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// SPDX-License-Identifier: GPL-2.0-or-later
/*
* sysfs.c sysfs ABI access functions for TMON program
*
* Copyright (C) 2013 Intel Corporation. All rights reserved.
*
* Author: Jacob Pan <[email protected]>
*/
#include <unistd.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <stdint.h>
#include <dirent.h>
#include <libintl.h>
#include <limits.h>
#include <ctype.h>
#include <time.h>
#include <syslog.h>
#include <sys/time.h>
#include <errno.h>
#include "tmon.h"
struct tmon_platform_data ptdata;
const char *trip_type_name[] = {
"critical",
"hot",
"passive",
"active",
};
int sysfs_set_ulong(char *path, char *filename, unsigned long val)
{
FILE *fd;
int ret = -1;
char filepath[PATH_MAX + 2]; /* NUL and '/' */
snprintf(filepath, sizeof(filepath), "%s/%s", path, filename);
fd = fopen(filepath, "w");
if (!fd) {
syslog(LOG_ERR, "Err: open %s: %s\n", __func__, filepath);
return ret;
}
ret = fprintf(fd, "%lu", val);
fclose(fd);
return 0;
}
/* history of thermal data, used for control algo */
#define NR_THERMAL_RECORDS 3
struct thermal_data_record trec[NR_THERMAL_RECORDS];
int cur_thermal_record; /* index to the trec array */
static int sysfs_get_ulong(char *path, char *filename, unsigned long *p_ulong)
{
FILE *fd;
int ret = -1;
char filepath[PATH_MAX + 2]; /* NUL and '/' */
snprintf(filepath, sizeof(filepath), "%s/%s", path, filename);
fd = fopen(filepath, "r");
if (!fd) {
syslog(LOG_ERR, "Err: open %s: %s\n", __func__, filepath);
return ret;
}
ret = fscanf(fd, "%lu", p_ulong);
fclose(fd);
return 0;
}
static int sysfs_get_string(char *path, char *filename, char *str)
{
FILE *fd;
int ret = -1;
char filepath[PATH_MAX + 2]; /* NUL and '/' */
snprintf(filepath, sizeof(filepath), "%s/%s", path, filename);
fd = fopen(filepath, "r");
if (!fd) {
syslog(LOG_ERR, "Err: open %s: %s\n", __func__, filepath);
return ret;
}
ret = fscanf(fd, "%256s", str);
fclose(fd);
return ret;
}
/* get states of the cooling device instance */
static int probe_cdev(struct cdev_info *cdi, char *path)
{
sysfs_get_string(path, "type", cdi->type);
sysfs_get_ulong(path, "max_state", &cdi->max_state);
sysfs_get_ulong(path, "cur_state", &cdi->cur_state);
syslog(LOG_INFO, "%s: %s: type %s, max %lu, curr %lu inst %d\n",
__func__, path,
cdi->type, cdi->max_state, cdi->cur_state, cdi->instance);
return 0;
}
static int str_to_trip_type(char *name)
{
int i;
for (i = 0; i < NR_THERMAL_TRIP_TYPE; i++) {
if (!strcmp(name, trip_type_name[i]))
return i;
}
return -ENOENT;
}
/* scan and fill in trip point info for a thermal zone and trip point id */
static int get_trip_point_data(char *tz_path, int tzid, int tpid)
{
char filename[256];
char temp_str[256];
int trip_type;
if (tpid >= MAX_NR_TRIP)
return -EINVAL;
/* check trip point type */
snprintf(filename, sizeof(filename), "trip_point_%d_type", tpid);
sysfs_get_string(tz_path, filename, temp_str);
trip_type = str_to_trip_type(temp_str);
if (trip_type < 0) {
syslog(LOG_ERR, "%s:%s no matching type\n", __func__, temp_str);
return -ENOENT;
}
ptdata.tzi[tzid].tp[tpid].type = trip_type;
syslog(LOG_INFO, "%s:tz:%d tp:%d:type:%s type id %d\n", __func__, tzid,
tpid, temp_str, trip_type);
/* TODO: check attribute */
return 0;
}
/* return instance id for file format such as trip_point_4_temp */
static int get_instance_id(char *name, int pos, int skip)
{
char *ch;
int i = 0;
ch = strtok(name, "_");
while (ch != NULL) {
++i;
syslog(LOG_INFO, "%s:%s:%s:%d", __func__, name, ch, i);
ch = strtok(NULL, "_");
if (pos == i)
return atol(ch + skip);
}
return -1;
}
/* Find trip point info of a thermal zone */
static int find_tzone_tp(char *tz_name, char *d_name, struct tz_info *tzi,
int tz_id)
{
int tp_id;
unsigned long temp_ulong;
if (strstr(d_name, "trip_point") &&
strstr(d_name, "temp")) {
/* check if trip point temp is non-zero
* ignore 0/invalid trip points
*/
sysfs_get_ulong(tz_name, d_name, &temp_ulong);
if (temp_ulong < MAX_TEMP_KC) {
tzi->nr_trip_pts++;
/* found a valid trip point */
tp_id = get_instance_id(d_name, 2, 0);
syslog(LOG_DEBUG, "tzone %s trip %d temp %lu tpnode %s",
tz_name, tp_id, temp_ulong, d_name);
if (tp_id < 0 || tp_id >= MAX_NR_TRIP) {
syslog(LOG_ERR, "Failed to find TP inst %s\n",
d_name);
return -1;
}
get_trip_point_data(tz_name, tz_id, tp_id);
tzi->tp[tp_id].temp = temp_ulong;
}
}
return 0;
}
/* check cooling devices for binding info. */
static int find_tzone_cdev(struct dirent *nl, char *tz_name,
struct tz_info *tzi, int tz_id, int cid)
{
unsigned long trip_instance = 0;
char cdev_name_linked[256];
char cdev_name[PATH_MAX];
char cdev_trip_name[PATH_MAX];
int cdev_id;
if (nl->d_type == DT_LNK) {
syslog(LOG_DEBUG, "TZ%d: cdev: %s cid %d\n", tz_id, nl->d_name,
cid);
tzi->nr_cdev++;
if (tzi->nr_cdev > ptdata.nr_cooling_dev) {
syslog(LOG_ERR, "Err: Too many cdev? %d\n",
tzi->nr_cdev);
return -EINVAL;
}
/* find the link to real cooling device record binding */
snprintf(cdev_name, sizeof(cdev_name) - 2, "%s/%s",
tz_name, nl->d_name);
memset(cdev_name_linked, 0, sizeof(cdev_name_linked));
if (readlink(cdev_name, cdev_name_linked,
sizeof(cdev_name_linked) - 1) != -1) {
cdev_id = get_instance_id(cdev_name_linked, 1,
sizeof("device") - 1);
syslog(LOG_DEBUG, "cdev %s linked to %s : %d\n",
cdev_name, cdev_name_linked, cdev_id);
tzi->cdev_binding |= (1 << cdev_id);
/* find the trip point in which the cdev is binded to
* in this tzone
*/
snprintf(cdev_trip_name, sizeof(cdev_trip_name) - 1,
"%s%s", nl->d_name, "_trip_point");
sysfs_get_ulong(tz_name, cdev_trip_name,
&trip_instance);
/* validate trip point range, e.g. trip could return -1
* when passive is enabled
*/
if (trip_instance > MAX_NR_TRIP)
trip_instance = 0;
tzi->trip_binding[cdev_id] |= 1 << trip_instance;
syslog(LOG_DEBUG, "cdev %s -> trip:%lu: 0x%lx %d\n",
cdev_name, trip_instance,
tzi->trip_binding[cdev_id],
cdev_id);
}
return 0;
}
return -ENODEV;
}
/*****************************************************************************
* Before calling scan_tzones, thermal sysfs must be probed to determine
* the number of thermal zones and cooling devices.
* We loop through each thermal zone and fill in tz_info struct, i.e.
* ptdata.tzi[]
root@jacob-chiefriver:~# tree -d /sys/class/thermal/thermal_zone0
/sys/class/thermal/thermal_zone0
|-- cdev0 -> ../cooling_device4
|-- cdev1 -> ../cooling_device3
|-- cdev10 -> ../cooling_device7
|-- cdev11 -> ../cooling_device6
|-- cdev12 -> ../cooling_device5
|-- cdev2 -> ../cooling_device2
|-- cdev3 -> ../cooling_device1
|-- cdev4 -> ../cooling_device0
|-- cdev5 -> ../cooling_device12
|-- cdev6 -> ../cooling_device11
|-- cdev7 -> ../cooling_device10
|-- cdev8 -> ../cooling_device9
|-- cdev9 -> ../cooling_device8
|-- device -> ../../../LNXSYSTM:00/device:62/LNXTHERM:00
|-- power
`-- subsystem -> ../../../../class/thermal
*****************************************************************************/
static int scan_tzones(void)
{
DIR *dir;
struct dirent **namelist;
char tz_name[256];
int i, j, n, k = 0;
if (!ptdata.nr_tz_sensor)
return -1;
for (i = 0; i <= ptdata.max_tz_instance; i++) {
memset(tz_name, 0, sizeof(tz_name));
snprintf(tz_name, 256, "%s/%s%d", THERMAL_SYSFS, TZONE, i);
dir = opendir(tz_name);
if (!dir) {
syslog(LOG_INFO, "Thermal zone %s skipped\n", tz_name);
continue;
}
/* keep track of valid tzones */
n = scandir(tz_name, &namelist, 0, alphasort);
if (n < 0)
syslog(LOG_ERR, "scandir failed in %s", tz_name);
else {
sysfs_get_string(tz_name, "type", ptdata.tzi[k].type);
ptdata.tzi[k].instance = i;
/* detect trip points and cdev attached to this tzone */
j = 0; /* index for cdev */
ptdata.tzi[k].nr_cdev = 0;
ptdata.tzi[k].nr_trip_pts = 0;
while (n--) {
char *temp_str;
if (find_tzone_tp(tz_name, namelist[n]->d_name,
&ptdata.tzi[k], k))
break;
temp_str = strstr(namelist[n]->d_name, "cdev");
if (!temp_str) {
free(namelist[n]);
continue;
}
if (!find_tzone_cdev(namelist[n], tz_name,
&ptdata.tzi[k], i, j))
j++; /* increment cdev index */
free(namelist[n]);
}
free(namelist);
}
/*TODO: reverse trip points */
closedir(dir);
syslog(LOG_INFO, "TZ %d has %d cdev\n", i,
ptdata.tzi[k].nr_cdev);
k++;
}
return 0;
}
static int scan_cdevs(void)
{
DIR *dir;
struct dirent **namelist;
char cdev_name[256];
int i, n, k = 0;
if (!ptdata.nr_cooling_dev) {
fprintf(stderr, "No cooling devices found\n");
return 0;
}
for (i = 0; i <= ptdata.max_cdev_instance; i++) {
memset(cdev_name, 0, sizeof(cdev_name));
snprintf(cdev_name, 256, "%s/%s%d", THERMAL_SYSFS, CDEV, i);
dir = opendir(cdev_name);
if (!dir) {
syslog(LOG_INFO, "Cooling dev %s skipped\n", cdev_name);
/* there is a gap in cooling device id, check again
* for the same index.
*/
continue;
}
n = scandir(cdev_name, &namelist, 0, alphasort);
if (n < 0)
syslog(LOG_ERR, "scandir failed in %s", cdev_name);
else {
sysfs_get_string(cdev_name, "type", ptdata.cdi[k].type);
ptdata.cdi[k].instance = i;
if (strstr(ptdata.cdi[k].type, ctrl_cdev)) {
ptdata.cdi[k].flag |= CDEV_FLAG_IN_CONTROL;
syslog(LOG_DEBUG, "control cdev id %d\n", i);
}
while (n--)
free(namelist[n]);
free(namelist);
}
closedir(dir);
k++;
}
return 0;
}
int probe_thermal_sysfs(void)
{
DIR *dir;
struct dirent **namelist;
int n;
dir = opendir(THERMAL_SYSFS);
if (!dir) {
fprintf(stderr, "\nNo thermal sysfs, exit\n");
return -1;
}
n = scandir(THERMAL_SYSFS, &namelist, 0, alphasort);
if (n < 0)
syslog(LOG_ERR, "scandir failed in thermal sysfs");
else {
/* detect number of thermal zones and cooling devices */
while (n--) {
int inst;
if (strstr(namelist[n]->d_name, CDEV)) {
inst = get_instance_id(namelist[n]->d_name, 1,
sizeof("device") - 1);
/* keep track of the max cooling device since
* there may be gaps.
*/
if (inst > ptdata.max_cdev_instance)
ptdata.max_cdev_instance = inst;
syslog(LOG_DEBUG, "found cdev: %s %d %d\n",
namelist[n]->d_name,
ptdata.nr_cooling_dev,
ptdata.max_cdev_instance);
ptdata.nr_cooling_dev++;
} else if (strstr(namelist[n]->d_name, TZONE)) {
inst = get_instance_id(namelist[n]->d_name, 1,
sizeof("zone") - 1);
if (inst > ptdata.max_tz_instance)
ptdata.max_tz_instance = inst;
syslog(LOG_DEBUG, "found tzone: %s %d %d\n",
namelist[n]->d_name,
ptdata.nr_tz_sensor,
ptdata.max_tz_instance);
ptdata.nr_tz_sensor++;
}
free(namelist[n]);
}
free(namelist);
}
syslog(LOG_INFO, "found %d tzone(s), %d cdev(s), target zone %d\n",
ptdata.nr_tz_sensor, ptdata.nr_cooling_dev,
target_thermal_zone);
closedir(dir);
if (!ptdata.nr_tz_sensor) {
fprintf(stderr, "\nNo thermal zones found, exit\n\n");
return -1;
}
ptdata.tzi = calloc(ptdata.max_tz_instance+1, sizeof(struct tz_info));
if (!ptdata.tzi) {
fprintf(stderr, "Err: allocate tz_info\n");
return -1;
}
/* we still show thermal zone information if there is no cdev */
if (ptdata.nr_cooling_dev) {
ptdata.cdi = calloc(ptdata.max_cdev_instance + 1,
sizeof(struct cdev_info));
if (!ptdata.cdi) {
free(ptdata.tzi);
fprintf(stderr, "Err: allocate cdev_info\n");
return -1;
}
}
/* now probe tzones */
if (scan_tzones())
return -1;
if (scan_cdevs())
return -1;
return 0;
}
/* convert sysfs zone instance to zone array index */
int zone_instance_to_index(int zone_inst)
{
int i;
for (i = 0; i < ptdata.nr_tz_sensor; i++)
if (ptdata.tzi[i].instance == zone_inst)
return i;
return -ENOENT;
}
/* read temperature of all thermal zones */
int update_thermal_data()
{
int i;
int next_thermal_record = cur_thermal_record + 1;
char tz_name[256];
static unsigned long samples;
if (!ptdata.nr_tz_sensor) {
syslog(LOG_ERR, "No thermal zones found!\n");
return -1;
}
/* circular buffer for keeping historic data */
if (next_thermal_record >= NR_THERMAL_RECORDS)
next_thermal_record = 0;
gettimeofday(&trec[next_thermal_record].tv, NULL);
if (tmon_log) {
fprintf(tmon_log, "%lu ", ++samples);
fprintf(tmon_log, "%3.1f ", p_param.t_target);
}
for (i = 0; i < ptdata.nr_tz_sensor; i++) {
memset(tz_name, 0, sizeof(tz_name));
snprintf(tz_name, 256, "%s/%s%d", THERMAL_SYSFS, TZONE,
ptdata.tzi[i].instance);
sysfs_get_ulong(tz_name, "temp",
&trec[next_thermal_record].temp[i]);
if (tmon_log)
fprintf(tmon_log, "%lu ",
trec[next_thermal_record].temp[i] / 1000);
}
cur_thermal_record = next_thermal_record;
for (i = 0; i < ptdata.nr_cooling_dev; i++) {
char cdev_name[256];
unsigned long val;
snprintf(cdev_name, 256, "%s/%s%d", THERMAL_SYSFS, CDEV,
ptdata.cdi[i].instance);
probe_cdev(&ptdata.cdi[i], cdev_name);
val = ptdata.cdi[i].cur_state;
if (val > 1000000)
val = 0;
if (tmon_log)
fprintf(tmon_log, "%lu ", val);
}
if (tmon_log) {
fprintf(tmon_log, "\n");
fflush(tmon_log);
}
return 0;
}
void set_ctrl_state(unsigned long state)
{
char ctrl_cdev_path[256];
int i;
unsigned long cdev_state;
if (no_control)
return;
/* set all ctrl cdev to the same state */
for (i = 0; i < ptdata.nr_cooling_dev; i++) {
if (ptdata.cdi[i].flag & CDEV_FLAG_IN_CONTROL) {
if (ptdata.cdi[i].max_state < 10) {
strcpy(ctrl_cdev, "None.");
return;
}
/* scale to percentage of max_state */
cdev_state = state * ptdata.cdi[i].max_state/100;
syslog(LOG_DEBUG,
"ctrl cdev %d set state %lu scaled to %lu\n",
ptdata.cdi[i].instance, state, cdev_state);
snprintf(ctrl_cdev_path, 256, "%s/%s%d", THERMAL_SYSFS,
CDEV, ptdata.cdi[i].instance);
syslog(LOG_DEBUG, "ctrl cdev path %s", ctrl_cdev_path);
sysfs_set_ulong(ctrl_cdev_path, "cur_state",
cdev_state);
}
}
}
void get_ctrl_state(unsigned long *state)
{
char ctrl_cdev_path[256];
int ctrl_cdev_id = -1;
int i;
/* TODO: take average of all ctrl types. also consider change based on
* uevent. Take the first reading for now.
*/
for (i = 0; i < ptdata.nr_cooling_dev; i++) {
if (ptdata.cdi[i].flag & CDEV_FLAG_IN_CONTROL) {
ctrl_cdev_id = ptdata.cdi[i].instance;
syslog(LOG_INFO, "ctrl cdev %d get state\n",
ptdata.cdi[i].instance);
break;
}
}
if (ctrl_cdev_id == -1) {
*state = 0;
return;
}
snprintf(ctrl_cdev_path, 256, "%s/%s%d", THERMAL_SYSFS,
CDEV, ctrl_cdev_id);
sysfs_get_ulong(ctrl_cdev_path, "cur_state", state);
}
void free_thermal_data(void)
{
free(ptdata.tzi);
free(ptdata.cdi);
}
| linux-master | tools/thermal/tmon/sysfs.c |
// SPDX-License-Identifier: GPL-2.0-or-later
/*
* pid.c PID controller for testing cooling devices
*
* Copyright (C) 2012 Intel Corporation. All rights reserved.
*
* Author Name Jacob Pan <[email protected]>
*/
#include <unistd.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <stdint.h>
#include <sys/types.h>
#include <dirent.h>
#include <libintl.h>
#include <ctype.h>
#include <assert.h>
#include <time.h>
#include <limits.h>
#include <math.h>
#include <sys/stat.h>
#include <syslog.h>
#include "tmon.h"
/**************************************************************************
* PID (Proportional-Integral-Derivative) controller is commonly used in
* linear control system, consider the process.
* G(s) = U(s)/E(s)
* kp = proportional gain
* ki = integral gain
* kd = derivative gain
* Ts
* We use type C Alan Bradley equation which takes set point off the
* output dependency in P and D term.
*
* y[k] = y[k-1] - kp*(x[k] - x[k-1]) + Ki*Ts*e[k] - Kd*(x[k]
* - 2*x[k-1]+x[k-2])/Ts
*
*
***********************************************************************/
struct pid_params p_param;
/* cached data from previous loop */
static double xk_1, xk_2; /* input temperature x[k-#] */
/*
* TODO: make PID parameters tuned automatically,
* 1. use CPU burn to produce open loop unit step response
* 2. calculate PID based on Ziegler-Nichols rule
*
* add a flag for tuning PID
*/
int init_thermal_controller(void)
{
/* init pid params */
p_param.ts = ticktime;
/* TODO: get it from TUI tuning tab */
p_param.kp = .36;
p_param.ki = 5.0;
p_param.kd = 0.19;
p_param.t_target = target_temp_user;
return 0;
}
void controller_reset(void)
{
/* TODO: relax control data when not over thermal limit */
syslog(LOG_DEBUG, "TC inactive, relax p-state\n");
p_param.y_k = 0.0;
xk_1 = 0.0;
xk_2 = 0.0;
set_ctrl_state(0);
}
/* To be called at time interval Ts. Type C PID controller.
* y[k] = y[k-1] - kp*(x[k] - x[k-1]) + Ki*Ts*e[k] - Kd*(x[k]
* - 2*x[k-1]+x[k-2])/Ts
* TODO: add low pass filter for D term
*/
#define GUARD_BAND (2)
void controller_handler(const double xk, double *yk)
{
double ek;
double p_term, i_term, d_term;
ek = p_param.t_target - xk; /* error */
if (ek >= 3.0) {
syslog(LOG_DEBUG, "PID: %3.1f Below set point %3.1f, stop\n",
xk, p_param.t_target);
controller_reset();
*yk = 0.0;
return;
}
/* compute intermediate PID terms */
p_term = -p_param.kp * (xk - xk_1);
i_term = p_param.kp * p_param.ki * p_param.ts * ek;
d_term = -p_param.kp * p_param.kd * (xk - 2 * xk_1 + xk_2) / p_param.ts;
/* compute output */
*yk += p_term + i_term + d_term;
/* update sample data */
xk_1 = xk;
xk_2 = xk_1;
/* clamp output adjustment range */
if (*yk < -LIMIT_HIGH)
*yk = -LIMIT_HIGH;
else if (*yk > -LIMIT_LOW)
*yk = -LIMIT_LOW;
p_param.y_k = *yk;
set_ctrl_state(lround(fabs(p_param.y_k)));
}
| linux-master | tools/thermal/tmon/pid.c |
// SPDX-License-Identifier: GPL-2.0-or-later
/*
* tmon.c Thermal Monitor (TMON) main function and entry point
*
* Copyright (C) 2012 Intel Corporation. All rights reserved.
*
* Author: Jacob Pan <[email protected]>
*/
#include <getopt.h>
#include <unistd.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <ncurses.h>
#include <ctype.h>
#include <time.h>
#include <signal.h>
#include <limits.h>
#include <sys/time.h>
#include <pthread.h>
#include <math.h>
#include <stdarg.h>
#include <syslog.h>
#include "tmon.h"
unsigned long ticktime = 1; /* seconds */
unsigned long no_control = 1; /* monitoring only or use cooling device for
* temperature control.
*/
double time_elapsed = 0.0;
unsigned long target_temp_user = 65; /* can be select by tui later */
int dialogue_on;
int tmon_exit;
static short daemon_mode;
static int logging; /* for recording thermal data to a file */
static int debug_on;
FILE *tmon_log;
/*cooling device used for the PID controller */
char ctrl_cdev[CDEV_NAME_SIZE] = "None";
int target_thermal_zone; /* user selected target zone instance */
static void start_daemon_mode(void);
pthread_t event_tid;
pthread_mutex_t input_lock;
void usage(void)
{
printf("Usage: tmon [OPTION...]\n");
printf(" -c, --control cooling device in control\n");
printf(" -d, --daemon run as daemon, no TUI\n");
printf(" -g, --debug debug message in syslog\n");
printf(" -h, --help show this help message\n");
printf(" -l, --log log data to /var/tmp/tmon.log\n");
printf(" -t, --time-interval sampling time interval, > 1 sec.\n");
printf(" -T, --target-temp initial target temperature\n");
printf(" -v, --version show version\n");
printf(" -z, --zone target thermal zone id\n");
exit(0);
}
void version(void)
{
printf("TMON version %s\n", VERSION);
exit(EXIT_SUCCESS);
}
static void tmon_cleanup(void)
{
syslog(LOG_INFO, "TMON exit cleanup\n");
fflush(stdout);
refresh();
if (tmon_log)
fclose(tmon_log);
if (event_tid) {
pthread_mutex_lock(&input_lock);
pthread_cancel(event_tid);
pthread_mutex_unlock(&input_lock);
pthread_mutex_destroy(&input_lock);
}
closelog();
/* relax control knobs, undo throttling */
set_ctrl_state(0);
keypad(stdscr, FALSE);
echo();
nocbreak();
close_windows();
endwin();
free_thermal_data();
exit(1);
}
static void tmon_sig_handler(int sig)
{
syslog(LOG_INFO, "TMON caught signal %d\n", sig);
refresh();
switch (sig) {
case SIGTERM:
printf("sigterm, exit and clean up\n");
fflush(stdout);
break;
case SIGKILL:
printf("sigkill, exit and clean up\n");
fflush(stdout);
break;
case SIGINT:
printf("ctrl-c, exit and clean up\n");
fflush(stdout);
break;
default:
break;
}
tmon_exit = true;
}
static void start_syslog(void)
{
if (debug_on)
setlogmask(LOG_UPTO(LOG_DEBUG));
else
setlogmask(LOG_UPTO(LOG_ERR));
openlog("tmon.log", LOG_CONS | LOG_PID | LOG_NDELAY, LOG_LOCAL0);
syslog(LOG_NOTICE, "TMON started by User %d", getuid());
}
static void prepare_logging(void)
{
int i;
struct stat logstat;
if (!logging)
return;
/* open local data log file */
tmon_log = fopen(TMON_LOG_FILE, "w+");
if (!tmon_log) {
syslog(LOG_ERR, "failed to open log file %s\n", TMON_LOG_FILE);
return;
}
if (lstat(TMON_LOG_FILE, &logstat) < 0) {
syslog(LOG_ERR, "Unable to stat log file %s\n", TMON_LOG_FILE);
fclose(tmon_log);
tmon_log = NULL;
return;
}
/* The log file must be a regular file owned by us */
if (S_ISLNK(logstat.st_mode)) {
syslog(LOG_ERR, "Log file is a symlink. Will not log\n");
fclose(tmon_log);
tmon_log = NULL;
return;
}
if (logstat.st_uid != getuid()) {
syslog(LOG_ERR, "We don't own the log file. Not logging\n");
fclose(tmon_log);
tmon_log = NULL;
return;
}
fprintf(tmon_log, "#----------- THERMAL SYSTEM CONFIG -------------\n");
for (i = 0; i < ptdata.nr_tz_sensor; i++) {
char binding_str[33]; /* size of long + 1 */
int j;
memset(binding_str, 0, sizeof(binding_str));
for (j = 0; j < 32; j++)
binding_str[j] = (ptdata.tzi[i].cdev_binding & (1 << j)) ?
'1' : '0';
fprintf(tmon_log, "#thermal zone %s%02d cdevs binding: %32s\n",
ptdata.tzi[i].type,
ptdata.tzi[i].instance,
binding_str);
for (j = 0; j < ptdata.tzi[i].nr_trip_pts; j++) {
fprintf(tmon_log, "#\tTP%02d type:%s, temp:%lu\n", j,
trip_type_name[ptdata.tzi[i].tp[j].type],
ptdata.tzi[i].tp[j].temp);
}
}
for (i = 0; i < ptdata.nr_cooling_dev; i++)
fprintf(tmon_log, "#cooling devices%02d: %s\n",
i, ptdata.cdi[i].type);
fprintf(tmon_log, "#---------- THERMAL DATA LOG STARTED -----------\n");
fprintf(tmon_log, "Samples TargetTemp ");
for (i = 0; i < ptdata.nr_tz_sensor; i++) {
fprintf(tmon_log, "%s%d ", ptdata.tzi[i].type,
ptdata.tzi[i].instance);
}
for (i = 0; i < ptdata.nr_cooling_dev; i++)
fprintf(tmon_log, "%s%d ", ptdata.cdi[i].type,
ptdata.cdi[i].instance);
fprintf(tmon_log, "\n");
}
static struct option opts[] = {
{ "control", 1, NULL, 'c' },
{ "daemon", 0, NULL, 'd' },
{ "time-interval", 1, NULL, 't' },
{ "target-temp", 1, NULL, 'T' },
{ "log", 0, NULL, 'l' },
{ "help", 0, NULL, 'h' },
{ "version", 0, NULL, 'v' },
{ "debug", 0, NULL, 'g' },
{ 0, 0, NULL, 0 }
};
int main(int argc, char **argv)
{
int err = 0;
int id2 = 0, c;
double yk = 0.0, temp; /* controller output */
int target_tz_index;
if (geteuid() != 0) {
printf("TMON needs to be run as root\n");
exit(EXIT_FAILURE);
}
while ((c = getopt_long(argc, argv, "c:dlht:T:vgz:", opts, &id2)) != -1) {
switch (c) {
case 'c':
no_control = 0;
strncpy(ctrl_cdev, optarg, CDEV_NAME_SIZE);
break;
case 'd':
start_daemon_mode();
printf("Run TMON in daemon mode\n");
break;
case 't':
ticktime = strtod(optarg, NULL);
if (ticktime < 1)
ticktime = 1;
break;
case 'T':
temp = strtod(optarg, NULL);
if (temp < 0) {
fprintf(stderr, "error: temperature must be positive\n");
return 1;
}
target_temp_user = temp;
break;
case 'l':
printf("Logging data to /var/tmp/tmon.log\n");
logging = 1;
break;
case 'h':
usage();
break;
case 'v':
version();
break;
case 'g':
debug_on = 1;
break;
case 'z':
target_thermal_zone = strtod(optarg, NULL);
break;
default:
break;
}
}
if (pthread_mutex_init(&input_lock, NULL) != 0) {
fprintf(stderr, "\n mutex init failed, exit\n");
return 1;
}
start_syslog();
if (signal(SIGINT, tmon_sig_handler) == SIG_ERR)
syslog(LOG_DEBUG, "Cannot handle SIGINT\n");
if (signal(SIGTERM, tmon_sig_handler) == SIG_ERR)
syslog(LOG_DEBUG, "Cannot handle SIGTERM\n");
if (probe_thermal_sysfs()) {
pthread_mutex_destroy(&input_lock);
closelog();
return -1;
}
initialize_curses();
setup_windows();
signal(SIGWINCH, resize_handler);
show_title_bar();
show_sensors_w();
show_cooling_device();
update_thermal_data();
show_data_w();
prepare_logging();
init_thermal_controller();
nodelay(stdscr, TRUE);
err = pthread_create(&event_tid, NULL, &handle_tui_events, NULL);
if (err != 0) {
printf("\ncan't create thread :[%s]", strerror(err));
tmon_cleanup();
exit(EXIT_FAILURE);
}
/* validate range of user selected target zone, default to the first
* instance if out of range
*/
target_tz_index = zone_instance_to_index(target_thermal_zone);
if (target_tz_index < 0) {
target_thermal_zone = ptdata.tzi[0].instance;
syslog(LOG_ERR, "target zone is not found, default to %d\n",
target_thermal_zone);
}
while (1) {
sleep(ticktime);
show_title_bar();
show_sensors_w();
update_thermal_data();
if (!dialogue_on) {
show_data_w();
show_cooling_device();
}
time_elapsed += ticktime;
controller_handler(trec[0].temp[target_tz_index] / 1000, &yk);
trec[0].pid_out_pct = yk;
if (!dialogue_on)
show_control_w();
if (tmon_exit)
break;
}
tmon_cleanup();
return 0;
}
static void start_daemon_mode(void)
{
daemon_mode = 1;
/* fork */
pid_t sid, pid = fork();
if (pid < 0)
exit(EXIT_FAILURE);
else if (pid > 0)
/* kill parent */
exit(EXIT_SUCCESS);
/* disable TUI, it may not be necessary, but saves some resource */
disable_tui();
/* change the file mode mask */
umask(S_IWGRP | S_IWOTH);
/* new SID for the daemon process */
sid = setsid();
if (sid < 0)
exit(EXIT_FAILURE);
/* change working directory */
if ((chdir("/")) < 0)
exit(EXIT_FAILURE);
sleep(10);
close(STDIN_FILENO);
close(STDOUT_FILENO);
close(STDERR_FILENO);
}
| linux-master | tools/thermal/tmon/tmon.c |
// SPDX-License-Identifier: GPL-2.0
/*
* cgroup_event_listener.c - Simple listener of cgroup events
*
* Copyright (C) Kirill A. Shutemov <[email protected]>
*/
#include <assert.h>
#include <err.h>
#include <errno.h>
#include <fcntl.h>
#include <libgen.h>
#include <limits.h>
#include <stdio.h>
#include <string.h>
#include <unistd.h>
#include <sys/eventfd.h>
#define USAGE_STR "Usage: cgroup_event_listener <path-to-control-file> <args>"
int main(int argc, char **argv)
{
int efd = -1;
int cfd = -1;
int event_control = -1;
char event_control_path[PATH_MAX];
char line[LINE_MAX];
int ret;
if (argc != 3)
errx(1, "%s", USAGE_STR);
cfd = open(argv[1], O_RDONLY);
if (cfd == -1)
err(1, "Cannot open %s", argv[1]);
ret = snprintf(event_control_path, PATH_MAX, "%s/cgroup.event_control",
dirname(argv[1]));
if (ret >= PATH_MAX)
errx(1, "Path to cgroup.event_control is too long");
event_control = open(event_control_path, O_WRONLY);
if (event_control == -1)
err(1, "Cannot open %s", event_control_path);
efd = eventfd(0, 0);
if (efd == -1)
err(1, "eventfd() failed");
ret = snprintf(line, LINE_MAX, "%d %d %s", efd, cfd, argv[2]);
if (ret >= LINE_MAX)
errx(1, "Arguments string is too long");
ret = write(event_control, line, strlen(line) + 1);
if (ret == -1)
err(1, "Cannot write to cgroup.event_control");
while (1) {
uint64_t result;
ret = read(efd, &result, sizeof(result));
if (ret == -1) {
if (errno == EINTR)
continue;
err(1, "Cannot read from eventfd");
}
assert(ret == sizeof(result));
ret = access(event_control_path, W_OK);
if ((ret == -1) && (errno == ENOENT)) {
puts("The cgroup seems to have removed.");
break;
}
if (ret == -1)
err(1, "cgroup.event_control is not accessible any more");
printf("%s %s: crossed\n", argv[1], argv[2]);
}
return 0;
}
| linux-master | tools/cgroup/cgroup_event_listener.c |
// SPDX-License-Identifier: GPL-2.0
/*
* led_hw_brightness_mon.c
*
* This program monitors LED brightness level changes having its origin
* in hardware/firmware, i.e. outside of kernel control.
* A timestamp and brightness value is printed each time the brightness changes.
*
* Usage: led_hw_brightness_mon <device-name>
*
* <device-name> is the name of the LED class device to be monitored. Pressing
* CTRL+C will exit.
*/
#include <errno.h>
#include <fcntl.h>
#include <poll.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <time.h>
#include <unistd.h>
#include <linux/uleds.h>
int main(int argc, char const *argv[])
{
int fd, ret;
char brightness_file_path[LED_MAX_NAME_SIZE + 11];
struct pollfd pollfd;
struct timespec ts;
char buf[11];
if (argc != 2) {
fprintf(stderr, "Requires <device-name> argument\n");
return 1;
}
snprintf(brightness_file_path, LED_MAX_NAME_SIZE,
"/sys/class/leds/%s/brightness_hw_changed", argv[1]);
fd = open(brightness_file_path, O_RDONLY);
if (fd == -1) {
printf("Failed to open %s file\n", brightness_file_path);
return 1;
}
/*
* read may fail if no hw brightness change has occurred so far,
* but it is required to avoid spurious poll notifications in
* the opposite case.
*/
read(fd, buf, sizeof(buf));
pollfd.fd = fd;
pollfd.events = POLLPRI;
while (1) {
ret = poll(&pollfd, 1, -1);
if (ret == -1) {
printf("Failed to poll %s file (%d)\n",
brightness_file_path, ret);
ret = 1;
break;
}
clock_gettime(CLOCK_MONOTONIC, &ts);
ret = read(fd, buf, sizeof(buf));
if (ret < 0)
break;
ret = lseek(pollfd.fd, 0, SEEK_SET);
if (ret < 0) {
printf("lseek failed (%d)\n", ret);
break;
}
printf("[%ld.%09ld] %d\n", ts.tv_sec, ts.tv_nsec, atoi(buf));
}
close(fd);
return ret;
}
| linux-master | tools/leds/led_hw_brightness_mon.c |
// SPDX-License-Identifier: GPL-2.0
/*
* uledmon.c
*
* This program creates a new userspace LED class device and monitors it. A
* timestamp and brightness value is printed each time the brightness changes.
*
* Usage: uledmon <device-name>
*
* <device-name> is the name of the LED class device to be created. Pressing
* CTRL+C will exit.
*/
#include <fcntl.h>
#include <stdio.h>
#include <string.h>
#include <time.h>
#include <unistd.h>
#include <linux/uleds.h>
int main(int argc, char const *argv[])
{
struct uleds_user_dev uleds_dev;
int fd, ret;
int brightness;
struct timespec ts;
if (argc != 2) {
fprintf(stderr, "Requires <device-name> argument\n");
return 1;
}
strncpy(uleds_dev.name, argv[1], LED_MAX_NAME_SIZE);
uleds_dev.max_brightness = 100;
fd = open("/dev/uleds", O_RDWR);
if (fd == -1) {
perror("Failed to open /dev/uleds");
return 1;
}
ret = write(fd, &uleds_dev, sizeof(uleds_dev));
if (ret == -1) {
perror("Failed to write to /dev/uleds");
close(fd);
return 1;
}
while (1) {
ret = read(fd, &brightness, sizeof(brightness));
if (ret == -1) {
perror("Failed to read from /dev/uleds");
close(fd);
return 1;
}
clock_gettime(CLOCK_MONOTONIC, &ts);
printf("[%ld.%09ld] %u\n", ts.tv_sec, ts.tv_nsec, brightness);
}
close(fd);
return 0;
}
| linux-master | tools/leds/uledmon.c |
/*
* Copyright © 2018 Alexey Dobriyan <[email protected]>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
/* Test that /proc/loadavg correctly reports last pid in pid namespace. */
#include <errno.h>
#include <sched.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <unistd.h>
#include <sys/wait.h>
int main(void)
{
pid_t pid;
int wstatus;
if (unshare(CLONE_NEWPID) == -1) {
if (errno == ENOSYS || errno == EPERM)
return 4;
return 1;
}
pid = fork();
if (pid == -1)
return 1;
if (pid == 0) {
char buf[128], *p;
int fd;
ssize_t rv;
fd = open("/proc/loadavg" , O_RDONLY);
if (fd == -1)
return 1;
rv = read(fd, buf, sizeof(buf));
if (rv < 3)
return 1;
p = buf + rv;
/* pid 1 */
if (!(p[-3] == ' ' && p[-2] == '1' && p[-1] == '\n'))
return 1;
pid = fork();
if (pid == -1)
return 1;
if (pid == 0)
return 0;
if (waitpid(pid, NULL, 0) == -1)
return 1;
lseek(fd, 0, SEEK_SET);
rv = read(fd, buf, sizeof(buf));
if (rv < 3)
return 1;
p = buf + rv;
/* pid 2 */
if (!(p[-3] == ' ' && p[-2] == '2' && p[-1] == '\n'))
return 1;
return 0;
}
if (waitpid(pid, &wstatus, 0) == -1)
return 1;
if (WIFEXITED(wstatus) && WEXITSTATUS(wstatus) == 0)
return 0;
return 1;
}
| linux-master | tools/testing/selftests/proc/proc-loadavg-001.c |
/*
* Copyright © 2018 Alexey Dobriyan <[email protected]>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <errno.h>
#include <unistd.h>
int main(void)
{
char buf[64];
int fd;
fd = open("/proc/self/wchan", O_RDONLY);
if (fd == -1) {
if (errno == ENOENT)
return 4;
return 1;
}
buf[0] = '\0';
if (read(fd, buf, sizeof(buf)) != 1)
return 1;
if (buf[0] != '0')
return 1;
return 0;
}
| linux-master | tools/testing/selftests/proc/proc-self-wchan.c |
/*
* Copyright (c) 2019 Alexey Dobriyan <[email protected]>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
/*
* Fork and exec tiny 1 page executable which precisely controls its VM.
* Test /proc/$PID/maps
* Test /proc/$PID/smaps
* Test /proc/$PID/smaps_rollup
* Test /proc/$PID/statm
*
* FIXME require CONFIG_TMPFS which can be disabled
* FIXME test other values from "smaps"
* FIXME support other archs
*/
#undef NDEBUG
#include <assert.h>
#include <errno.h>
#include <sched.h>
#include <signal.h>
#include <stdbool.h>
#include <stdint.h>
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <sys/mount.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <sys/wait.h>
#include <fcntl.h>
#include <unistd.h>
#include <sys/syscall.h>
#include <sys/uio.h>
#include <linux/kdev_t.h>
#include <sys/time.h>
#include <sys/resource.h>
#include "../kselftest.h"
static inline long sys_execveat(int dirfd, const char *pathname, char **argv, char **envp, int flags)
{
return syscall(SYS_execveat, dirfd, pathname, argv, envp, flags);
}
static void make_private_tmp(void)
{
if (unshare(CLONE_NEWNS) == -1) {
if (errno == ENOSYS || errno == EPERM) {
exit(4);
}
exit(1);
}
if (mount(NULL, "/", NULL, MS_PRIVATE|MS_REC, NULL) == -1) {
exit(1);
}
if (mount(NULL, "/tmp", "tmpfs", 0, NULL) == -1) {
exit(1);
}
}
static pid_t pid = -1;
static void ate(void)
{
if (pid > 0) {
kill(pid, SIGTERM);
}
}
struct elf64_hdr {
uint8_t e_ident[16];
uint16_t e_type;
uint16_t e_machine;
uint32_t e_version;
uint64_t e_entry;
uint64_t e_phoff;
uint64_t e_shoff;
uint32_t e_flags;
uint16_t e_ehsize;
uint16_t e_phentsize;
uint16_t e_phnum;
uint16_t e_shentsize;
uint16_t e_shnum;
uint16_t e_shstrndx;
};
struct elf64_phdr {
uint32_t p_type;
uint32_t p_flags;
uint64_t p_offset;
uint64_t p_vaddr;
uint64_t p_paddr;
uint64_t p_filesz;
uint64_t p_memsz;
uint64_t p_align;
};
#ifdef __x86_64__
#define PAGE_SIZE 4096
#define VADDR (1UL << 32)
#define MAPS_OFFSET 73
#define syscall 0x0f, 0x05
#define mov_rdi(x) \
0x48, 0xbf, \
(x)&0xff, ((x)>>8)&0xff, ((x)>>16)&0xff, ((x)>>24)&0xff, \
((x)>>32)&0xff, ((x)>>40)&0xff, ((x)>>48)&0xff, ((x)>>56)&0xff
#define mov_rsi(x) \
0x48, 0xbe, \
(x)&0xff, ((x)>>8)&0xff, ((x)>>16)&0xff, ((x)>>24)&0xff, \
((x)>>32)&0xff, ((x)>>40)&0xff, ((x)>>48)&0xff, ((x)>>56)&0xff
#define mov_eax(x) \
0xb8, (x)&0xff, ((x)>>8)&0xff, ((x)>>16)&0xff, ((x)>>24)&0xff
static const uint8_t payload[] = {
/* Casually unmap stack, vDSO and everything else. */
/* munmap */
mov_rdi(VADDR + 4096),
mov_rsi((1ULL << 47) - 4096 - VADDR - 4096),
mov_eax(11),
syscall,
/* Ping parent. */
/* write(0, &c, 1); */
0x31, 0xff, /* xor edi, edi */
0x48, 0x8d, 0x35, 0x00, 0x00, 0x00, 0x00, /* lea rsi, [rip] */
0xba, 0x01, 0x00, 0x00, 0x00, /* mov edx, 1 */
mov_eax(1),
syscall,
/* 1: pause(); */
mov_eax(34),
syscall,
0xeb, 0xf7, /* jmp 1b */
};
static int make_exe(const uint8_t *payload, size_t len)
{
struct elf64_hdr h;
struct elf64_phdr ph;
struct iovec iov[3] = {
{&h, sizeof(struct elf64_hdr)},
{&ph, sizeof(struct elf64_phdr)},
{(void *)payload, len},
};
int fd, fd1;
char buf[64];
memset(&h, 0, sizeof(h));
h.e_ident[0] = 0x7f;
h.e_ident[1] = 'E';
h.e_ident[2] = 'L';
h.e_ident[3] = 'F';
h.e_ident[4] = 2;
h.e_ident[5] = 1;
h.e_ident[6] = 1;
h.e_ident[7] = 0;
h.e_type = 2;
h.e_machine = 0x3e;
h.e_version = 1;
h.e_entry = VADDR + sizeof(struct elf64_hdr) + sizeof(struct elf64_phdr);
h.e_phoff = sizeof(struct elf64_hdr);
h.e_shoff = 0;
h.e_flags = 0;
h.e_ehsize = sizeof(struct elf64_hdr);
h.e_phentsize = sizeof(struct elf64_phdr);
h.e_phnum = 1;
h.e_shentsize = 0;
h.e_shnum = 0;
h.e_shstrndx = 0;
memset(&ph, 0, sizeof(ph));
ph.p_type = 1;
ph.p_flags = (1<<2)|1;
ph.p_offset = 0;
ph.p_vaddr = VADDR;
ph.p_paddr = 0;
ph.p_filesz = sizeof(struct elf64_hdr) + sizeof(struct elf64_phdr) + len;
ph.p_memsz = sizeof(struct elf64_hdr) + sizeof(struct elf64_phdr) + len;
ph.p_align = 4096;
fd = openat(AT_FDCWD, "/tmp", O_WRONLY|O_EXCL|O_TMPFILE, 0700);
if (fd == -1) {
exit(1);
}
if (writev(fd, iov, 3) != sizeof(struct elf64_hdr) + sizeof(struct elf64_phdr) + len) {
exit(1);
}
/* Avoid ETXTBSY on exec. */
snprintf(buf, sizeof(buf), "/proc/self/fd/%u", fd);
fd1 = open(buf, O_RDONLY|O_CLOEXEC);
close(fd);
return fd1;
}
#endif
/*
* 0: vsyscall VMA doesn't exist vsyscall=none
* 1: vsyscall VMA is --xp vsyscall=xonly
* 2: vsyscall VMA is r-xp vsyscall=emulate
*/
static volatile int g_vsyscall;
static const char *str_vsyscall;
static const char str_vsyscall_0[] = "";
static const char str_vsyscall_1[] =
"ffffffffff600000-ffffffffff601000 --xp 00000000 00:00 0 [vsyscall]\n";
static const char str_vsyscall_2[] =
"ffffffffff600000-ffffffffff601000 r-xp 00000000 00:00 0 [vsyscall]\n";
#ifdef __x86_64__
static void sigaction_SIGSEGV(int _, siginfo_t *__, void *___)
{
_exit(g_vsyscall);
}
/*
* vsyscall page can't be unmapped, probe it directly.
*/
static void vsyscall(void)
{
pid_t pid;
int wstatus;
pid = fork();
if (pid < 0) {
fprintf(stderr, "fork, errno %d\n", errno);
exit(1);
}
if (pid == 0) {
struct rlimit rlim = {0, 0};
(void)setrlimit(RLIMIT_CORE, &rlim);
/* Hide "segfault at ffffffffff600000" messages. */
struct sigaction act;
memset(&act, 0, sizeof(struct sigaction));
act.sa_flags = SA_SIGINFO;
act.sa_sigaction = sigaction_SIGSEGV;
(void)sigaction(SIGSEGV, &act, NULL);
g_vsyscall = 0;
/* gettimeofday(NULL, NULL); */
uint64_t rax = 0xffffffffff600000;
asm volatile (
"call *%[rax]"
: [rax] "+a" (rax)
: "D" (NULL), "S" (NULL)
: "rcx", "r11"
);
g_vsyscall = 1;
*(volatile int *)0xffffffffff600000UL;
g_vsyscall = 2;
exit(g_vsyscall);
}
waitpid(pid, &wstatus, 0);
if (WIFEXITED(wstatus)) {
g_vsyscall = WEXITSTATUS(wstatus);
} else {
fprintf(stderr, "error: wstatus %08x\n", wstatus);
exit(1);
}
}
int main(void)
{
int pipefd[2];
int exec_fd;
vsyscall();
switch (g_vsyscall) {
case 0:
str_vsyscall = str_vsyscall_0;
break;
case 1:
str_vsyscall = str_vsyscall_1;
break;
case 2:
str_vsyscall = str_vsyscall_2;
break;
default:
abort();
}
atexit(ate);
make_private_tmp();
/* Reserve fd 0 for 1-byte pipe ping from child. */
close(0);
if (open("/", O_RDONLY|O_DIRECTORY|O_PATH) != 0) {
return 1;
}
exec_fd = make_exe(payload, sizeof(payload));
if (pipe(pipefd) == -1) {
return 1;
}
if (dup2(pipefd[1], 0) != 0) {
return 1;
}
pid = fork();
if (pid == -1) {
return 1;
}
if (pid == 0) {
sys_execveat(exec_fd, "", NULL, NULL, AT_EMPTY_PATH);
return 1;
}
char _;
if (read(pipefd[0], &_, 1) != 1) {
return 1;
}
struct stat st;
if (fstat(exec_fd, &st) == -1) {
return 1;
}
/* Generate "head -n1 /proc/$PID/maps" */
char buf0[256];
memset(buf0, ' ', sizeof(buf0));
int len = snprintf(buf0, sizeof(buf0),
"%08lx-%08lx r-xp 00000000 %02lx:%02lx %llu",
VADDR, VADDR + PAGE_SIZE,
MAJOR(st.st_dev), MINOR(st.st_dev),
(unsigned long long)st.st_ino);
buf0[len] = ' ';
snprintf(buf0 + MAPS_OFFSET, sizeof(buf0) - MAPS_OFFSET,
"/tmp/#%llu (deleted)\n", (unsigned long long)st.st_ino);
/* Test /proc/$PID/maps */
{
const size_t len = strlen(buf0) + strlen(str_vsyscall);
char buf[256];
ssize_t rv;
int fd;
snprintf(buf, sizeof(buf), "/proc/%u/maps", pid);
fd = open(buf, O_RDONLY);
if (fd == -1) {
return 1;
}
rv = read(fd, buf, sizeof(buf));
assert(rv == len);
assert(memcmp(buf, buf0, strlen(buf0)) == 0);
if (g_vsyscall > 0) {
assert(memcmp(buf + strlen(buf0), str_vsyscall, strlen(str_vsyscall)) == 0);
}
}
/* Test /proc/$PID/smaps */
{
char buf[4096];
ssize_t rv;
int fd;
snprintf(buf, sizeof(buf), "/proc/%u/smaps", pid);
fd = open(buf, O_RDONLY);
if (fd == -1) {
return 1;
}
rv = read(fd, buf, sizeof(buf));
assert(0 <= rv && rv <= sizeof(buf));
assert(rv >= strlen(buf0));
assert(memcmp(buf, buf0, strlen(buf0)) == 0);
#define RSS1 "Rss: 4 kB\n"
#define RSS2 "Rss: 0 kB\n"
#define PSS1 "Pss: 4 kB\n"
#define PSS2 "Pss: 0 kB\n"
assert(memmem(buf, rv, RSS1, strlen(RSS1)) ||
memmem(buf, rv, RSS2, strlen(RSS2)));
assert(memmem(buf, rv, PSS1, strlen(PSS1)) ||
memmem(buf, rv, PSS2, strlen(PSS2)));
static const char *S[] = {
"Size: 4 kB\n",
"KernelPageSize: 4 kB\n",
"MMUPageSize: 4 kB\n",
"Anonymous: 0 kB\n",
"AnonHugePages: 0 kB\n",
"Shared_Hugetlb: 0 kB\n",
"Private_Hugetlb: 0 kB\n",
"Locked: 0 kB\n",
};
int i;
for (i = 0; i < ARRAY_SIZE(S); i++) {
assert(memmem(buf, rv, S[i], strlen(S[i])));
}
if (g_vsyscall > 0) {
assert(memmem(buf, rv, str_vsyscall, strlen(str_vsyscall)));
}
}
/* Test /proc/$PID/smaps_rollup */
{
char bufr[256];
memset(bufr, ' ', sizeof(bufr));
len = snprintf(bufr, sizeof(bufr),
"%08lx-%08lx ---p 00000000 00:00 0",
VADDR, VADDR + PAGE_SIZE);
bufr[len] = ' ';
snprintf(bufr + MAPS_OFFSET, sizeof(bufr) - MAPS_OFFSET,
"[rollup]\n");
char buf[1024];
ssize_t rv;
int fd;
snprintf(buf, sizeof(buf), "/proc/%u/smaps_rollup", pid);
fd = open(buf, O_RDONLY);
if (fd == -1) {
return 1;
}
rv = read(fd, buf, sizeof(buf));
assert(0 <= rv && rv <= sizeof(buf));
assert(rv >= strlen(bufr));
assert(memcmp(buf, bufr, strlen(bufr)) == 0);
assert(memmem(buf, rv, RSS1, strlen(RSS1)) ||
memmem(buf, rv, RSS2, strlen(RSS2)));
assert(memmem(buf, rv, PSS1, strlen(PSS1)) ||
memmem(buf, rv, PSS2, strlen(PSS2)));
static const char *S[] = {
"Anonymous: 0 kB\n",
"AnonHugePages: 0 kB\n",
"Shared_Hugetlb: 0 kB\n",
"Private_Hugetlb: 0 kB\n",
"Locked: 0 kB\n",
};
int i;
for (i = 0; i < ARRAY_SIZE(S); i++) {
assert(memmem(buf, rv, S[i], strlen(S[i])));
}
}
/* Test /proc/$PID/statm */
{
char buf[64];
ssize_t rv;
int fd;
snprintf(buf, sizeof(buf), "/proc/%u/statm", pid);
fd = open(buf, O_RDONLY);
if (fd == -1) {
return 1;
}
rv = read(fd, buf, sizeof(buf));
assert(rv == 7 * 2);
assert(buf[0] == '1'); /* ->total_vm */
assert(buf[1] == ' ');
assert(buf[2] == '0' || buf[2] == '1'); /* rss */
assert(buf[3] == ' ');
assert(buf[4] == '0' || buf[2] == '1'); /* file rss */
assert(buf[5] == ' ');
assert(buf[6] == '1'); /* ELF executable segments */
assert(buf[7] == ' ');
assert(buf[8] == '0');
assert(buf[9] == ' ');
assert(buf[10] == '0'); /* ->data_vm + ->stack_vm */
assert(buf[11] == ' ');
assert(buf[12] == '0');
assert(buf[13] == '\n');
}
return 0;
}
#else
int main(void)
{
return 4;
}
#endif
| linux-master | tools/testing/selftests/proc/proc-pid-vm.c |
/*
* Copyright © 2018 Alexey Dobriyan <[email protected]>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
// Test that boottime value in /proc/uptime and CLOCK_BOOTTIME increment
// monotonically. We don't test idle time monotonicity due to broken iowait
// task counting, cf: comment above get_cpu_idle_time_us()
#undef NDEBUG
#include <assert.h>
#include <stdint.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include "proc-uptime.h"
int main(void)
{
uint64_t start, u0, u1, c0, c1;
int fd;
fd = open("/proc/uptime", O_RDONLY);
assert(fd >= 0);
u0 = proc_uptime(fd);
start = u0;
c0 = clock_boottime();
do {
u1 = proc_uptime(fd);
c1 = clock_boottime();
/* Is /proc/uptime monotonic ? */
assert(u1 >= u0);
/* Is CLOCK_BOOTTIME monotonic ? */
assert(c1 >= c0);
/* Is CLOCK_BOOTTIME VS /proc/uptime monotonic ? */
assert(c0 >= u0);
u0 = u1;
c0 = c1;
} while (u1 - start < 100);
return 0;
}
| linux-master | tools/testing/selftests/proc/proc-uptime-001.c |
/*
* Copyright (c) 2021 Alexey Dobriyan <[email protected]>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
/*
* Test that "mount -t proc -o subset=pid" hides everything but pids,
* /proc/self and /proc/thread-self.
*/
#undef NDEBUG
#include <assert.h>
#include <errno.h>
#include <sched.h>
#include <stdbool.h>
#include <stdlib.h>
#include <string.h>
#include <sys/mount.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <dirent.h>
#include <unistd.h>
#include <stdio.h>
static inline bool streq(const char *a, const char *b)
{
return strcmp(a, b) == 0;
}
static void make_private_proc(void)
{
if (unshare(CLONE_NEWNS) == -1) {
if (errno == ENOSYS || errno == EPERM) {
exit(4);
}
exit(1);
}
if (mount(NULL, "/", NULL, MS_PRIVATE|MS_REC, NULL) == -1) {
exit(1);
}
if (mount(NULL, "/proc", "proc", 0, "subset=pid") == -1) {
exit(1);
}
}
static bool string_is_pid(const char *s)
{
while (1) {
switch (*s++) {
case '0':case '1':case '2':case '3':case '4':
case '5':case '6':case '7':case '8':case '9':
continue;
case '\0':
return true;
default:
return false;
}
}
}
int main(void)
{
make_private_proc();
DIR *d = opendir("/proc");
assert(d);
struct dirent *de;
bool dot = false;
bool dot_dot = false;
bool self = false;
bool thread_self = false;
while ((de = readdir(d))) {
if (streq(de->d_name, ".")) {
assert(!dot);
dot = true;
assert(de->d_type == DT_DIR);
} else if (streq(de->d_name, "..")) {
assert(!dot_dot);
dot_dot = true;
assert(de->d_type == DT_DIR);
} else if (streq(de->d_name, "self")) {
assert(!self);
self = true;
assert(de->d_type == DT_LNK);
} else if (streq(de->d_name, "thread-self")) {
assert(!thread_self);
thread_self = true;
assert(de->d_type == DT_LNK);
} else {
if (!string_is_pid(de->d_name)) {
fprintf(stderr, "d_name '%s'\n", de->d_name);
assert(0);
}
assert(de->d_type == DT_DIR);
}
}
char c;
int rv = readlink("/proc/cpuinfo", &c, 1);
assert(rv == -1 && errno == ENOENT);
int fd = open("/proc/cpuinfo", O_RDONLY);
assert(fd == -1 && errno == ENOENT);
return 0;
}
| linux-master | tools/testing/selftests/proc/proc-subset-pid.c |
/*
* Copyright © 2018 Alexey Dobriyan <[email protected]>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
/* Test readlink /proc/self/map_files/... */
#include <errno.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <stdio.h>
#include <unistd.h>
#include <sys/mman.h>
#include <stdlib.h>
static void pass(const char *fmt, unsigned long a, unsigned long b)
{
char name[64];
char buf[64];
snprintf(name, sizeof(name), fmt, a, b);
if (readlink(name, buf, sizeof(buf)) == -1)
exit(1);
}
static void fail(const char *fmt, unsigned long a, unsigned long b)
{
char name[64];
char buf[64];
snprintf(name, sizeof(name), fmt, a, b);
if (readlink(name, buf, sizeof(buf)) == -1 && errno == ENOENT)
return;
exit(1);
}
int main(void)
{
const unsigned int PAGE_SIZE = sysconf(_SC_PAGESIZE);
void *p;
int fd;
unsigned long a, b;
fd = open("/dev/zero", O_RDONLY);
if (fd == -1)
return 1;
p = mmap(NULL, PAGE_SIZE, PROT_NONE, MAP_PRIVATE|MAP_FILE, fd, 0);
if (p == MAP_FAILED)
return 1;
a = (unsigned long)p;
b = (unsigned long)p + PAGE_SIZE;
pass("/proc/self/map_files/%lx-%lx", a, b);
fail("/proc/self/map_files/ %lx-%lx", a, b);
fail("/proc/self/map_files/%lx -%lx", a, b);
fail("/proc/self/map_files/%lx- %lx", a, b);
fail("/proc/self/map_files/%lx-%lx ", a, b);
fail("/proc/self/map_files/0%lx-%lx", a, b);
fail("/proc/self/map_files/%lx-0%lx", a, b);
if (sizeof(long) == 4) {
fail("/proc/self/map_files/100000000%lx-%lx", a, b);
fail("/proc/self/map_files/%lx-100000000%lx", a, b);
} else if (sizeof(long) == 8) {
fail("/proc/self/map_files/10000000000000000%lx-%lx", a, b);
fail("/proc/self/map_files/%lx-10000000000000000%lx", a, b);
} else
return 1;
return 0;
}
| linux-master | tools/testing/selftests/proc/proc-self-map-files-001.c |
/*
* Copyright © 2018 Alexey Dobriyan <[email protected]>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
// Test that open(/proc/*/fd/*) opens the same file.
#undef NDEBUG
#include <assert.h>
#include <stdio.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <unistd.h>
int main(void)
{
int fd0, fd1, fd2;
struct stat st0, st1, st2;
char buf[64];
int rv;
fd0 = open("/", O_DIRECTORY|O_RDONLY);
assert(fd0 >= 0);
snprintf(buf, sizeof(buf), "/proc/self/fd/%u", fd0);
fd1 = open(buf, O_RDONLY);
assert(fd1 >= 0);
snprintf(buf, sizeof(buf), "/proc/thread-self/fd/%u", fd0);
fd2 = open(buf, O_RDONLY);
assert(fd2 >= 0);
rv = fstat(fd0, &st0);
assert(rv == 0);
rv = fstat(fd1, &st1);
assert(rv == 0);
rv = fstat(fd2, &st2);
assert(rv == 0);
assert(st0.st_dev == st1.st_dev);
assert(st0.st_ino == st1.st_ino);
assert(st0.st_dev == st2.st_dev);
assert(st0.st_ino == st2.st_ino);
return 0;
}
| linux-master | tools/testing/selftests/proc/fd-002-posix-eq.c |
/*
* Copyright © 2019 Alexey Dobriyan <[email protected]>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
/*
* Test that setns(CLONE_NEWNET) points to new /proc/net content even
* if old one is in dcache.
*
* FIXME /proc/net/unix is under CONFIG_UNIX which can be disabled.
*/
#undef NDEBUG
#include <assert.h>
#include <errno.h>
#include <sched.h>
#include <signal.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <sys/socket.h>
static pid_t pid = -1;
static void f(void)
{
if (pid > 0) {
kill(pid, SIGTERM);
}
}
int main(void)
{
int fd[2];
char _ = 0;
int nsfd;
atexit(f);
/* Check for priviledges and syscall availability straight away. */
if (unshare(CLONE_NEWNET) == -1) {
if (errno == ENOSYS || errno == EPERM) {
return 4;
}
return 1;
}
/* Distinguisher between two otherwise empty net namespaces. */
if (socket(AF_UNIX, SOCK_STREAM, 0) == -1) {
return 1;
}
if (pipe(fd) == -1) {
return 1;
}
pid = fork();
if (pid == -1) {
return 1;
}
if (pid == 0) {
if (unshare(CLONE_NEWNET) == -1) {
return 1;
}
if (write(fd[1], &_, 1) != 1) {
return 1;
}
pause();
return 0;
}
if (read(fd[0], &_, 1) != 1) {
return 1;
}
{
char buf[64];
snprintf(buf, sizeof(buf), "/proc/%u/ns/net", pid);
nsfd = open(buf, O_RDONLY);
if (nsfd == -1) {
return 1;
}
}
/* Reliably pin dentry into dcache. */
(void)open("/proc/net/unix", O_RDONLY);
if (setns(nsfd, CLONE_NEWNET) == -1) {
return 1;
}
kill(pid, SIGTERM);
pid = 0;
{
char buf[4096];
ssize_t rv;
int fd;
fd = open("/proc/net/unix", O_RDONLY);
if (fd == -1) {
return 1;
}
#define S "Num RefCount Protocol Flags Type St Inode Path\n"
rv = read(fd, buf, sizeof(buf));
assert(rv == strlen(S));
assert(memcmp(buf, S, strlen(S)) == 0);
}
return 0;
}
| linux-master | tools/testing/selftests/proc/setns-dcache.c |
/*
* Copyright © 2020 Alexey Gladkov <[email protected]>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
#include <assert.h>
#include <stdlib.h>
#include <stdio.h>
#include <sys/mount.h>
#include <sys/types.h>
#include <sys/stat.h>
int main(void)
{
struct stat proc_st1, proc_st2;
char procbuff[] = "/tmp/proc.XXXXXX/meminfo";
char procdir1[] = "/tmp/proc.XXXXXX";
char procdir2[] = "/tmp/proc.XXXXXX";
assert(mkdtemp(procdir1) != NULL);
assert(mkdtemp(procdir2) != NULL);
assert(!mount("proc", procdir1, "proc", 0, "hidepid=1"));
assert(!mount("proc", procdir2, "proc", 0, "hidepid=2"));
snprintf(procbuff, sizeof(procbuff), "%s/meminfo", procdir1);
assert(!stat(procbuff, &proc_st1));
snprintf(procbuff, sizeof(procbuff), "%s/meminfo", procdir2);
assert(!stat(procbuff, &proc_st2));
umount(procdir1);
umount(procdir2);
assert(proc_st1.st_dev != proc_st2.st_dev);
return 0;
}
| linux-master | tools/testing/selftests/proc/proc-multiple-procfs.c |
/*
* Copyright © 2019 Alexey Dobriyan <[email protected]>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
/*
* Test that setns(CLONE_NEWIPC) points to new /proc/sysvipc content even
* if old one is in dcache.
*/
#undef NDEBUG
#include <assert.h>
#include <errno.h>
#include <stdio.h>
#include <sched.h>
#include <signal.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <sys/ipc.h>
#include <sys/shm.h>
static pid_t pid = -1;
static void f(void)
{
if (pid > 0) {
kill(pid, SIGTERM);
}
}
int main(void)
{
int fd[2];
char _ = 0;
int nsfd;
atexit(f);
/* Check for priviledges and syscall availability straight away. */
if (unshare(CLONE_NEWIPC) == -1) {
if (errno == ENOSYS || errno == EPERM) {
return 4;
}
return 1;
}
/* Distinguisher between two otherwise empty IPC namespaces. */
if (shmget(IPC_PRIVATE, 1, IPC_CREAT) == -1) {
return 1;
}
if (pipe(fd) == -1) {
return 1;
}
pid = fork();
if (pid == -1) {
return 1;
}
if (pid == 0) {
if (unshare(CLONE_NEWIPC) == -1) {
return 1;
}
if (write(fd[1], &_, 1) != 1) {
return 1;
}
pause();
return 0;
}
if (read(fd[0], &_, 1) != 1) {
return 1;
}
{
char buf[64];
snprintf(buf, sizeof(buf), "/proc/%u/ns/ipc", pid);
nsfd = open(buf, O_RDONLY);
if (nsfd == -1) {
return 1;
}
}
/* Reliably pin dentry into dcache. */
(void)open("/proc/sysvipc/shm", O_RDONLY);
if (setns(nsfd, CLONE_NEWIPC) == -1) {
return 1;
}
kill(pid, SIGTERM);
pid = 0;
{
char buf[4096];
ssize_t rv;
int fd;
fd = open("/proc/sysvipc/shm", O_RDONLY);
if (fd == -1) {
return 1;
}
#define S32 " key shmid perms size cpid lpid nattch uid gid cuid cgid atime dtime ctime rss swap\n"
#define S64 " key shmid perms size cpid lpid nattch uid gid cuid cgid atime dtime ctime rss swap\n"
rv = read(fd, buf, sizeof(buf));
if (rv == strlen(S32)) {
assert(memcmp(buf, S32, strlen(S32)) == 0);
} else if (rv == strlen(S64)) {
assert(memcmp(buf, S64, strlen(S64)) == 0);
} else {
assert(0);
}
}
return 0;
}
| linux-master | tools/testing/selftests/proc/setns-sysvipc.c |
/*
* Copyright © 2018 Alexey Dobriyan <[email protected]>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
// Test that boottime value in /proc/uptime and CLOCK_BOOTTIME increment
// monotonically while shifting across CPUs. We don't test idle time
// monotonicity due to broken iowait task counting, cf: comment above
// get_cpu_idle_time_us()
#undef NDEBUG
#include <assert.h>
#include <errno.h>
#include <unistd.h>
#include <sys/syscall.h>
#include <stdlib.h>
#include <string.h>
#include <stdint.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include "proc-uptime.h"
static inline int sys_sched_getaffinity(pid_t pid, unsigned int len, unsigned long *m)
{
return syscall(SYS_sched_getaffinity, pid, len, m);
}
static inline int sys_sched_setaffinity(pid_t pid, unsigned int len, unsigned long *m)
{
return syscall(SYS_sched_setaffinity, pid, len, m);
}
int main(void)
{
uint64_t u0, u1, c0, c1;
unsigned int len;
unsigned long *m;
unsigned int cpu;
int fd;
/* find out "nr_cpu_ids" */
m = NULL;
len = 0;
do {
len += sizeof(unsigned long);
free(m);
m = malloc(len);
} while (sys_sched_getaffinity(0, len, m) == -1 && errno == EINVAL);
fd = open("/proc/uptime", O_RDONLY);
assert(fd >= 0);
u0 = proc_uptime(fd);
c0 = clock_boottime();
for (cpu = 0; cpu < len * 8; cpu++) {
memset(m, 0, len);
m[cpu / (8 * sizeof(unsigned long))] |= 1UL << (cpu % (8 * sizeof(unsigned long)));
/* CPU might not exist, ignore error */
sys_sched_setaffinity(0, len, m);
u1 = proc_uptime(fd);
c1 = clock_boottime();
/* Is /proc/uptime monotonic ? */
assert(u1 >= u0);
/* Is CLOCK_BOOTTIME monotonic ? */
assert(c1 >= c0);
/* Is CLOCK_BOOTTIME VS /proc/uptime monotonic ? */
assert(c0 >= u0);
u0 = u1;
c0 = c1;
}
return 0;
}
| linux-master | tools/testing/selftests/proc/proc-uptime-002.c |
/*
* Copyright © 2020 Alexey Gladkov <[email protected]>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
#include <assert.h>
#include <unistd.h>
#include <stdlib.h>
#include <errno.h>
#include <linux/mount.h>
#include <linux/unistd.h>
static inline int fsopen(const char *fsname, unsigned int flags)
{
return syscall(__NR_fsopen, fsname, flags);
}
static inline int fsconfig(int fd, unsigned int cmd, const char *key, const void *val, int aux)
{
return syscall(__NR_fsconfig, fd, cmd, key, val, aux);
}
int main(void)
{
int fsfd, ret;
int hidepid = 2;
assert((fsfd = fsopen("proc", 0)) != -1);
ret = fsconfig(fsfd, FSCONFIG_SET_BINARY, "hidepid", &hidepid, 0);
assert(ret == -1);
assert(errno == EINVAL);
assert(!fsconfig(fsfd, FSCONFIG_SET_STRING, "hidepid", "2", 0));
assert(!fsconfig(fsfd, FSCONFIG_SET_STRING, "hidepid", "invisible", 0));
assert(!close(fsfd));
return 0;
}
| linux-master | tools/testing/selftests/proc/proc-fsconfig-hidepid.c |
/*
* Copyright © 2018 Alexey Dobriyan <[email protected]>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
// Test
// 1) read and lseek on every file in /proc
// 2) readlink of every symlink in /proc
// 3) recursively (1) + (2) for every directory in /proc
// 4) write to /proc/*/clear_refs and /proc/*/task/*/clear_refs
// 5) write to /proc/sysrq-trigger
#undef NDEBUG
#include <assert.h>
#include <errno.h>
#include <sys/types.h>
#include <dirent.h>
#include <stdbool.h>
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <sys/stat.h>
#include <sys/vfs.h>
#include <fcntl.h>
#include <unistd.h>
#include "proc.h"
static void f_reg(DIR *d, const char *filename)
{
char buf[4096];
int fd;
ssize_t rv;
/* read from /proc/kmsg can block */
fd = openat(dirfd(d), filename, O_RDONLY|O_NONBLOCK);
if (fd == -1)
return;
/* struct proc_ops::proc_lseek is mandatory if file is seekable. */
(void)lseek(fd, 0, SEEK_SET);
rv = read(fd, buf, sizeof(buf));
assert((0 <= rv && rv <= sizeof(buf)) || rv == -1);
close(fd);
}
static void f_reg_write(DIR *d, const char *filename, const char *buf, size_t len)
{
int fd;
ssize_t rv;
fd = openat(dirfd(d), filename, O_WRONLY);
if (fd == -1)
return;
rv = write(fd, buf, len);
assert((0 <= rv && rv <= len) || rv == -1);
close(fd);
}
static void f_lnk(DIR *d, const char *filename)
{
char buf[4096];
ssize_t rv;
rv = readlinkat(dirfd(d), filename, buf, sizeof(buf));
assert((0 <= rv && rv <= sizeof(buf)) || rv == -1);
}
static void f(DIR *d, unsigned int level)
{
struct dirent *de;
de = xreaddir(d);
assert(de->d_type == DT_DIR);
assert(streq(de->d_name, "."));
de = xreaddir(d);
assert(de->d_type == DT_DIR);
assert(streq(de->d_name, ".."));
while ((de = xreaddir(d))) {
assert(!streq(de->d_name, "."));
assert(!streq(de->d_name, ".."));
switch (de->d_type) {
DIR *dd;
int fd;
case DT_REG:
if (level == 0 && streq(de->d_name, "sysrq-trigger")) {
f_reg_write(d, de->d_name, "h", 1);
} else if (level == 1 && streq(de->d_name, "clear_refs")) {
f_reg_write(d, de->d_name, "1", 1);
} else if (level == 3 && streq(de->d_name, "clear_refs")) {
f_reg_write(d, de->d_name, "1", 1);
} else {
f_reg(d, de->d_name);
}
break;
case DT_DIR:
fd = openat(dirfd(d), de->d_name, O_DIRECTORY|O_RDONLY);
if (fd == -1)
continue;
dd = fdopendir(fd);
if (!dd)
continue;
f(dd, level + 1);
closedir(dd);
break;
case DT_LNK:
f_lnk(d, de->d_name);
break;
default:
assert(0);
}
}
}
int main(void)
{
DIR *d;
struct statfs sfs;
d = opendir("/proc");
if (!d)
return 4;
/* Ensure /proc is proc. */
if (fstatfs(dirfd(d), &sfs) == -1) {
return 1;
}
if (sfs.f_type != 0x9fa0) {
fprintf(stderr, "error: unexpected f_type %lx\n", (long)sfs.f_type);
return 2;
}
f(d, 0);
return 0;
}
| linux-master | tools/testing/selftests/proc/read.c |
/*
* Copyright © 2018 Alexey Dobriyan <[email protected]>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
// Test that /proc/self gives correct TGID.
#undef NDEBUG
#include <assert.h>
#include <stdio.h>
#include <unistd.h>
#include "proc.h"
int main(void)
{
char buf1[64], buf2[64];
pid_t pid;
ssize_t rv;
pid = sys_getpid();
snprintf(buf1, sizeof(buf1), "%u", pid);
rv = readlink("/proc/self", buf2, sizeof(buf2));
assert(rv == strlen(buf1));
buf2[rv] = '\0';
assert(streq(buf1, buf2));
return 0;
}
| linux-master | tools/testing/selftests/proc/self.c |
/*
* Copyright © 2018 Alexey Dobriyan <[email protected]>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
/* Test readlink /proc/self/map_files/... with minimum address. */
#include <errno.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <stdio.h>
#include <unistd.h>
#include <sys/mman.h>
#include <stdlib.h>
static void pass(const char *fmt, unsigned long a, unsigned long b)
{
char name[64];
char buf[64];
snprintf(name, sizeof(name), fmt, a, b);
if (readlink(name, buf, sizeof(buf)) == -1)
exit(1);
}
static void fail(const char *fmt, unsigned long a, unsigned long b)
{
char name[64];
char buf[64];
snprintf(name, sizeof(name), fmt, a, b);
if (readlink(name, buf, sizeof(buf)) == -1 && errno == ENOENT)
return;
exit(1);
}
int main(void)
{
const int PAGE_SIZE = sysconf(_SC_PAGESIZE);
/*
* va_max must be enough bigger than vm.mmap_min_addr, which is
* 64KB/32KB by default. (depends on CONFIG_LSM_MMAP_MIN_ADDR)
*/
const unsigned long va_max = 1UL << 20;
unsigned long va;
void *p;
int fd;
unsigned long a, b;
fd = open("/dev/zero", O_RDONLY);
if (fd == -1)
return 1;
for (va = 0; va < va_max; va += PAGE_SIZE) {
p = mmap((void *)va, PAGE_SIZE, PROT_NONE, MAP_PRIVATE|MAP_FILE|MAP_FIXED, fd, 0);
if (p == (void *)va)
break;
}
if (va == va_max) {
fprintf(stderr, "error: mmap doesn't like you\n");
return 1;
}
a = (unsigned long)p;
b = (unsigned long)p + PAGE_SIZE;
pass("/proc/self/map_files/%lx-%lx", a, b);
fail("/proc/self/map_files/ %lx-%lx", a, b);
fail("/proc/self/map_files/%lx -%lx", a, b);
fail("/proc/self/map_files/%lx- %lx", a, b);
fail("/proc/self/map_files/%lx-%lx ", a, b);
fail("/proc/self/map_files/0%lx-%lx", a, b);
fail("/proc/self/map_files/%lx-0%lx", a, b);
if (sizeof(long) == 4) {
fail("/proc/self/map_files/100000000%lx-%lx", a, b);
fail("/proc/self/map_files/%lx-100000000%lx", a, b);
} else if (sizeof(long) == 8) {
fail("/proc/self/map_files/10000000000000000%lx-%lx", a, b);
fail("/proc/self/map_files/%lx-10000000000000000%lx", a, b);
} else
return 1;
return 0;
}
| linux-master | tools/testing/selftests/proc/proc-self-map-files-002.c |
/*
* Copyright © 2018 Alexey Dobriyan <[email protected]>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
// Test /proc/*/fd lookup.
#undef NDEBUG
#include <assert.h>
#include <dirent.h>
#include <errno.h>
#include <limits.h>
#include <sched.h>
#include <stdio.h>
#include <unistd.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include "proc.h"
/* lstat(2) has more "coverage" in case non-symlink pops up somehow. */
static void test_lookup_pass(const char *pathname)
{
struct stat st;
ssize_t rv;
memset(&st, 0, sizeof(struct stat));
rv = lstat(pathname, &st);
assert(rv == 0);
assert(S_ISLNK(st.st_mode));
}
static void test_lookup_fail(const char *pathname)
{
struct stat st;
ssize_t rv;
rv = lstat(pathname, &st);
assert(rv == -1 && errno == ENOENT);
}
static void test_lookup(unsigned int fd)
{
char buf[64];
unsigned int c;
unsigned int u;
int i;
snprintf(buf, sizeof(buf), "/proc/self/fd/%u", fd);
test_lookup_pass(buf);
/* leading junk */
for (c = 1; c <= 255; c++) {
if (c == '/')
continue;
snprintf(buf, sizeof(buf), "/proc/self/fd/%c%u", c, fd);
test_lookup_fail(buf);
}
/* trailing junk */
for (c = 1; c <= 255; c++) {
if (c == '/')
continue;
snprintf(buf, sizeof(buf), "/proc/self/fd/%u%c", fd, c);
test_lookup_fail(buf);
}
for (i = INT_MIN; i < INT_MIN + 1024; i++) {
snprintf(buf, sizeof(buf), "/proc/self/fd/%d", i);
test_lookup_fail(buf);
}
for (i = -1024; i < 0; i++) {
snprintf(buf, sizeof(buf), "/proc/self/fd/%d", i);
test_lookup_fail(buf);
}
for (u = INT_MAX - 1024; u <= (unsigned int)INT_MAX + 1024; u++) {
snprintf(buf, sizeof(buf), "/proc/self/fd/%u", u);
test_lookup_fail(buf);
}
for (u = UINT_MAX - 1024; u != 0; u++) {
snprintf(buf, sizeof(buf), "/proc/self/fd/%u", u);
test_lookup_fail(buf);
}
}
int main(void)
{
struct dirent *de;
unsigned int fd, target_fd;
if (unshare(CLONE_FILES) == -1)
return 1;
/* Wipe fdtable. */
do {
DIR *d;
d = opendir("/proc/self/fd");
if (!d)
return 1;
de = xreaddir(d);
assert(de->d_type == DT_DIR);
assert(streq(de->d_name, "."));
de = xreaddir(d);
assert(de->d_type == DT_DIR);
assert(streq(de->d_name, ".."));
next:
de = xreaddir(d);
if (de) {
unsigned long long fd_ull;
unsigned int fd;
char *end;
assert(de->d_type == DT_LNK);
fd_ull = xstrtoull(de->d_name, &end);
assert(*end == '\0');
assert(fd_ull == (unsigned int)fd_ull);
fd = fd_ull;
if (fd == dirfd(d))
goto next;
close(fd);
}
closedir(d);
} while (de);
/* Now fdtable is clean. */
fd = open("/", O_PATH|O_DIRECTORY);
assert(fd == 0);
test_lookup(fd);
close(fd);
/* Clean again! */
fd = open("/", O_PATH|O_DIRECTORY);
assert(fd == 0);
/* Default RLIMIT_NOFILE-1 */
target_fd = 1023;
while (target_fd > 0) {
if (dup2(fd, target_fd) == target_fd)
break;
target_fd /= 2;
}
assert(target_fd > 0);
close(fd);
test_lookup(target_fd);
close(target_fd);
return 0;
}
| linux-master | tools/testing/selftests/proc/fd-001-lookup.c |
#if defined __amd64__ || defined __i386__
/*
* Copyright (c) 2022 Alexey Dobriyan <[email protected]>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
/*
* Create a process without mappings by unmapping everything at once and
* holding it with ptrace(2). See what happens to
*
* /proc/${pid}/maps
* /proc/${pid}/numa_maps
* /proc/${pid}/smaps
* /proc/${pid}/smaps_rollup
*/
#undef NDEBUG
#include <assert.h>
#include <errno.h>
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <fcntl.h>
#include <sys/mman.h>
#include <sys/ptrace.h>
#include <sys/resource.h>
#include <sys/types.h>
#include <sys/wait.h>
#include <unistd.h>
#ifdef __amd64__
#define TEST_VSYSCALL
#endif
/*
* 0: vsyscall VMA doesn't exist vsyscall=none
* 1: vsyscall VMA is --xp vsyscall=xonly
* 2: vsyscall VMA is r-xp vsyscall=emulate
*/
static volatile int g_vsyscall;
static const char *g_proc_pid_maps_vsyscall;
static const char *g_proc_pid_smaps_vsyscall;
static const char proc_pid_maps_vsyscall_0[] = "";
static const char proc_pid_maps_vsyscall_1[] =
"ffffffffff600000-ffffffffff601000 --xp 00000000 00:00 0 [vsyscall]\n";
static const char proc_pid_maps_vsyscall_2[] =
"ffffffffff600000-ffffffffff601000 r-xp 00000000 00:00 0 [vsyscall]\n";
static const char proc_pid_smaps_vsyscall_0[] = "";
static const char proc_pid_smaps_vsyscall_1[] =
"ffffffffff600000-ffffffffff601000 r-xp 00000000 00:00 0 [vsyscall]\n"
"Size: 4 kB\n"
"KernelPageSize: 4 kB\n"
"MMUPageSize: 4 kB\n"
"Rss: 0 kB\n"
"Pss: 0 kB\n"
"Pss_Dirty: 0 kB\n"
"Shared_Clean: 0 kB\n"
"Shared_Dirty: 0 kB\n"
"Private_Clean: 0 kB\n"
"Private_Dirty: 0 kB\n"
"Referenced: 0 kB\n"
"Anonymous: 0 kB\n"
"LazyFree: 0 kB\n"
"AnonHugePages: 0 kB\n"
"ShmemPmdMapped: 0 kB\n"
"FilePmdMapped: 0 kB\n"
"Shared_Hugetlb: 0 kB\n"
"Private_Hugetlb: 0 kB\n"
"Swap: 0 kB\n"
"SwapPss: 0 kB\n"
"Locked: 0 kB\n"
"THPeligible: 0\n"
/*
* "ProtectionKey:" field is conditional. It is possible to check it as well,
* but I don't have such machine.
*/
;
static const char proc_pid_smaps_vsyscall_2[] =
"ffffffffff600000-ffffffffff601000 --xp 00000000 00:00 0 [vsyscall]\n"
"Size: 4 kB\n"
"KernelPageSize: 4 kB\n"
"MMUPageSize: 4 kB\n"
"Rss: 0 kB\n"
"Pss: 0 kB\n"
"Pss_Dirty: 0 kB\n"
"Shared_Clean: 0 kB\n"
"Shared_Dirty: 0 kB\n"
"Private_Clean: 0 kB\n"
"Private_Dirty: 0 kB\n"
"Referenced: 0 kB\n"
"Anonymous: 0 kB\n"
"LazyFree: 0 kB\n"
"AnonHugePages: 0 kB\n"
"ShmemPmdMapped: 0 kB\n"
"FilePmdMapped: 0 kB\n"
"Shared_Hugetlb: 0 kB\n"
"Private_Hugetlb: 0 kB\n"
"Swap: 0 kB\n"
"SwapPss: 0 kB\n"
"Locked: 0 kB\n"
"THPeligible: 0\n"
/*
* "ProtectionKey:" field is conditional. It is possible to check it as well,
* but I'm too tired.
*/
;
static void sigaction_SIGSEGV(int _, siginfo_t *__, void *___)
{
_exit(EXIT_FAILURE);
}
#ifdef TEST_VSYSCALL
static void sigaction_SIGSEGV_vsyscall(int _, siginfo_t *__, void *___)
{
_exit(g_vsyscall);
}
/*
* vsyscall page can't be unmapped, probe it directly.
*/
static void vsyscall(void)
{
pid_t pid;
int wstatus;
pid = fork();
if (pid < 0) {
fprintf(stderr, "fork, errno %d\n", errno);
exit(1);
}
if (pid == 0) {
setrlimit(RLIMIT_CORE, &(struct rlimit){});
/* Hide "segfault at ffffffffff600000" messages. */
struct sigaction act = {};
act.sa_flags = SA_SIGINFO;
act.sa_sigaction = sigaction_SIGSEGV_vsyscall;
sigaction(SIGSEGV, &act, NULL);
g_vsyscall = 0;
/* gettimeofday(NULL, NULL); */
uint64_t rax = 0xffffffffff600000;
asm volatile (
"call *%[rax]"
: [rax] "+a" (rax)
: "D" (NULL), "S" (NULL)
: "rcx", "r11"
);
g_vsyscall = 1;
*(volatile int *)0xffffffffff600000UL;
g_vsyscall = 2;
exit(g_vsyscall);
}
waitpid(pid, &wstatus, 0);
if (WIFEXITED(wstatus)) {
g_vsyscall = WEXITSTATUS(wstatus);
} else {
fprintf(stderr, "error: vsyscall wstatus %08x\n", wstatus);
exit(1);
}
}
#endif
static int test_proc_pid_maps(pid_t pid)
{
char buf[4096];
snprintf(buf, sizeof(buf), "/proc/%u/maps", pid);
int fd = open(buf, O_RDONLY);
if (fd == -1) {
perror("open /proc/${pid}/maps");
return EXIT_FAILURE;
} else {
ssize_t rv = read(fd, buf, sizeof(buf));
close(fd);
if (g_vsyscall == 0) {
assert(rv == 0);
} else {
size_t len = strlen(g_proc_pid_maps_vsyscall);
assert(rv == len);
assert(memcmp(buf, g_proc_pid_maps_vsyscall, len) == 0);
}
return EXIT_SUCCESS;
}
}
static int test_proc_pid_numa_maps(pid_t pid)
{
char buf[4096];
snprintf(buf, sizeof(buf), "/proc/%u/numa_maps", pid);
int fd = open(buf, O_RDONLY);
if (fd == -1) {
if (errno == ENOENT) {
/*
* /proc/${pid}/numa_maps is under CONFIG_NUMA,
* it doesn't necessarily exist.
*/
return EXIT_SUCCESS;
}
perror("open /proc/${pid}/numa_maps");
return EXIT_FAILURE;
} else {
ssize_t rv = read(fd, buf, sizeof(buf));
close(fd);
assert(rv == 0);
return EXIT_SUCCESS;
}
}
static int test_proc_pid_smaps(pid_t pid)
{
char buf[4096];
snprintf(buf, sizeof(buf), "/proc/%u/smaps", pid);
int fd = open(buf, O_RDONLY);
if (fd == -1) {
if (errno == ENOENT) {
/*
* /proc/${pid}/smaps is under CONFIG_PROC_PAGE_MONITOR,
* it doesn't necessarily exist.
*/
return EXIT_SUCCESS;
}
perror("open /proc/${pid}/smaps");
return EXIT_FAILURE;
} else {
ssize_t rv = read(fd, buf, sizeof(buf));
close(fd);
if (g_vsyscall == 0) {
assert(rv == 0);
} else {
size_t len = strlen(g_proc_pid_maps_vsyscall);
/* TODO "ProtectionKey:" */
assert(rv > len);
assert(memcmp(buf, g_proc_pid_maps_vsyscall, len) == 0);
}
return EXIT_SUCCESS;
}
}
static const char g_smaps_rollup[] =
"00000000-00000000 ---p 00000000 00:00 0 [rollup]\n"
"Rss: 0 kB\n"
"Pss: 0 kB\n"
"Pss_Dirty: 0 kB\n"
"Pss_Anon: 0 kB\n"
"Pss_File: 0 kB\n"
"Pss_Shmem: 0 kB\n"
"Shared_Clean: 0 kB\n"
"Shared_Dirty: 0 kB\n"
"Private_Clean: 0 kB\n"
"Private_Dirty: 0 kB\n"
"Referenced: 0 kB\n"
"Anonymous: 0 kB\n"
"KSM: 0 kB\n"
"LazyFree: 0 kB\n"
"AnonHugePages: 0 kB\n"
"ShmemPmdMapped: 0 kB\n"
"FilePmdMapped: 0 kB\n"
"Shared_Hugetlb: 0 kB\n"
"Private_Hugetlb: 0 kB\n"
"Swap: 0 kB\n"
"SwapPss: 0 kB\n"
"Locked: 0 kB\n"
;
static int test_proc_pid_smaps_rollup(pid_t pid)
{
char buf[4096];
snprintf(buf, sizeof(buf), "/proc/%u/smaps_rollup", pid);
int fd = open(buf, O_RDONLY);
if (fd == -1) {
if (errno == ENOENT) {
/*
* /proc/${pid}/smaps_rollup is under CONFIG_PROC_PAGE_MONITOR,
* it doesn't necessarily exist.
*/
return EXIT_SUCCESS;
}
perror("open /proc/${pid}/smaps_rollup");
return EXIT_FAILURE;
} else {
ssize_t rv = read(fd, buf, sizeof(buf));
close(fd);
assert(rv == sizeof(g_smaps_rollup) - 1);
assert(memcmp(buf, g_smaps_rollup, sizeof(g_smaps_rollup) - 1) == 0);
return EXIT_SUCCESS;
}
}
int main(void)
{
int rv = EXIT_SUCCESS;
#ifdef TEST_VSYSCALL
vsyscall();
#endif
switch (g_vsyscall) {
case 0:
g_proc_pid_maps_vsyscall = proc_pid_maps_vsyscall_0;
g_proc_pid_smaps_vsyscall = proc_pid_smaps_vsyscall_0;
break;
case 1:
g_proc_pid_maps_vsyscall = proc_pid_maps_vsyscall_1;
g_proc_pid_smaps_vsyscall = proc_pid_smaps_vsyscall_1;
break;
case 2:
g_proc_pid_maps_vsyscall = proc_pid_maps_vsyscall_2;
g_proc_pid_smaps_vsyscall = proc_pid_smaps_vsyscall_2;
break;
default:
abort();
}
pid_t pid = fork();
if (pid == -1) {
perror("fork");
return EXIT_FAILURE;
} else if (pid == 0) {
rv = ptrace(PTRACE_TRACEME, 0, NULL, NULL);
if (rv != 0) {
if (errno == EPERM) {
fprintf(stderr,
"Did you know? ptrace(PTRACE_TRACEME) doesn't work under strace.\n"
);
kill(getppid(), SIGTERM);
return EXIT_FAILURE;
}
perror("ptrace PTRACE_TRACEME");
return EXIT_FAILURE;
}
/*
* Hide "segfault at ..." messages. Signal handler won't run.
*/
struct sigaction act = {};
act.sa_flags = SA_SIGINFO;
act.sa_sigaction = sigaction_SIGSEGV;
sigaction(SIGSEGV, &act, NULL);
#ifdef __amd64__
munmap(NULL, ((size_t)1 << 47) - 4096);
#elif defined __i386__
{
size_t len;
for (len = -4096;; len -= 4096) {
munmap(NULL, len);
}
}
#else
#error "implement 'unmap everything'"
#endif
return EXIT_FAILURE;
} else {
/*
* TODO find reliable way to signal parent that munmap(2) completed.
* Child can't do it directly because it effectively doesn't exist
* anymore. Looking at child's VM files isn't 100% reliable either:
* due to a bug they may not become empty or empty-like.
*/
sleep(1);
if (rv == EXIT_SUCCESS) {
rv = test_proc_pid_maps(pid);
}
if (rv == EXIT_SUCCESS) {
rv = test_proc_pid_numa_maps(pid);
}
if (rv == EXIT_SUCCESS) {
rv = test_proc_pid_smaps(pid);
}
if (rv == EXIT_SUCCESS) {
rv = test_proc_pid_smaps_rollup(pid);
}
/*
* TODO test /proc/${pid}/statm, task_statm()
* ->start_code, ->end_code aren't updated by munmap().
* Output can be "0 0 0 2 0 0 0\n" where "2" can be anything.
*/
/* Cut the rope. */
int wstatus;
waitpid(pid, &wstatus, 0);
assert(WIFSTOPPED(wstatus));
assert(WSTOPSIG(wstatus) == SIGSEGV);
}
return rv;
}
#else
int main(void)
{
return 4;
}
#endif
| linux-master | tools/testing/selftests/proc/proc-empty-vm.c |
/*
* Copyright © 2018 Alexey Dobriyan <[email protected]>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
// Test that /proc/thread-self gives correct TGID/PID.
#undef NDEBUG
#include <assert.h>
#include <sched.h>
#include <stdio.h>
#include <unistd.h>
#include <sys/mman.h>
#include <sys/wait.h>
#include "proc.h"
int f(void *arg)
{
char buf1[64], buf2[64];
pid_t pid, tid;
ssize_t rv;
pid = sys_getpid();
tid = sys_gettid();
snprintf(buf1, sizeof(buf1), "%u/task/%u", pid, tid);
rv = readlink("/proc/thread-self", buf2, sizeof(buf2));
assert(rv == strlen(buf1));
buf2[rv] = '\0';
assert(streq(buf1, buf2));
if (arg)
exit(0);
return 0;
}
int main(void)
{
const int PAGE_SIZE = sysconf(_SC_PAGESIZE);
pid_t pid;
void *stack;
/* main thread */
f((void *)0);
stack = mmap(NULL, 2 * PAGE_SIZE, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0);
assert(stack != MAP_FAILED);
/* side thread */
pid = clone(f, stack + PAGE_SIZE, CLONE_THREAD|CLONE_SIGHAND|CLONE_VM, (void *)1);
assert(pid > 0);
pause();
return 0;
}
| linux-master | tools/testing/selftests/proc/thread-self.c |
/*
* Copyright © 2018 Alexey Dobriyan <[email protected]>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
// Test that /proc/$KERNEL_THREAD/fd/ is empty.
#undef NDEBUG
#include <sys/syscall.h>
#include <assert.h>
#include <dirent.h>
#include <limits.h>
#include <stdio.h>
#include <string.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <unistd.h>
#include "proc.h"
#define PF_KHTREAD 0x00200000
/*
* Test for kernel threadness atomically with openat().
*
* Return /proc/$PID/fd descriptor if process is kernel thread.
* Return -1 if a process is userspace process.
*/
static int kernel_thread_fd(unsigned int pid)
{
unsigned int flags = 0;
char buf[4096];
int dir_fd, fd;
ssize_t rv;
snprintf(buf, sizeof(buf), "/proc/%u", pid);
dir_fd = open(buf, O_RDONLY|O_DIRECTORY);
if (dir_fd == -1)
return -1;
/*
* Believe it or not, struct task_struct::flags is directly exposed
* to userspace!
*/
fd = openat(dir_fd, "stat", O_RDONLY);
if (fd == -1) {
close(dir_fd);
return -1;
}
rv = read(fd, buf, sizeof(buf));
close(fd);
if (0 < rv && rv <= sizeof(buf)) {
unsigned long long flags_ull;
char *p, *end;
int i;
assert(buf[rv - 1] == '\n');
buf[rv - 1] = '\0';
/* Search backwards: ->comm can contain whitespace and ')'. */
for (i = 0; i < 43; i++) {
p = strrchr(buf, ' ');
assert(p);
*p = '\0';
}
p = strrchr(buf, ' ');
assert(p);
flags_ull = xstrtoull(p + 1, &end);
assert(*end == '\0');
assert(flags_ull == (unsigned int)flags_ull);
flags = flags_ull;
}
fd = -1;
if (flags & PF_KHTREAD) {
fd = openat(dir_fd, "fd", O_RDONLY|O_DIRECTORY);
}
close(dir_fd);
return fd;
}
static void test_readdir(int fd)
{
DIR *d;
struct dirent *de;
d = fdopendir(fd);
assert(d);
de = xreaddir(d);
assert(streq(de->d_name, "."));
assert(de->d_type == DT_DIR);
de = xreaddir(d);
assert(streq(de->d_name, ".."));
assert(de->d_type == DT_DIR);
de = xreaddir(d);
assert(!de);
}
static inline int sys_statx(int dirfd, const char *pathname, int flags,
unsigned int mask, void *stx)
{
return syscall(SYS_statx, dirfd, pathname, flags, mask, stx);
}
static void test_lookup_fail(int fd, const char *pathname)
{
char stx[256] __attribute__((aligned(8)));
int rv;
rv = sys_statx(fd, pathname, AT_SYMLINK_NOFOLLOW, 0, (void *)stx);
assert(rv == -1 && errno == ENOENT);
}
static void test_lookup(int fd)
{
char buf[64];
unsigned int u;
int i;
for (i = INT_MIN; i < INT_MIN + 1024; i++) {
snprintf(buf, sizeof(buf), "%d", i);
test_lookup_fail(fd, buf);
}
for (i = -1024; i < 1024; i++) {
snprintf(buf, sizeof(buf), "%d", i);
test_lookup_fail(fd, buf);
}
for (u = INT_MAX - 1024; u < (unsigned int)INT_MAX + 1024; u++) {
snprintf(buf, sizeof(buf), "%u", u);
test_lookup_fail(fd, buf);
}
for (u = UINT_MAX - 1024; u != 0; u++) {
snprintf(buf, sizeof(buf), "%u", u);
test_lookup_fail(fd, buf);
}
}
int main(void)
{
unsigned int pid;
int fd;
/*
* In theory this will loop indefinitely if kernel threads are exiled
* from /proc.
*
* Start with kthreadd.
*/
pid = 2;
while ((fd = kernel_thread_fd(pid)) == -1 && pid < 1024) {
pid++;
}
/* EACCES if run as non-root. */
if (pid >= 1024)
return 1;
test_readdir(fd);
test_lookup(fd);
return 0;
}
| linux-master | tools/testing/selftests/proc/fd-003-kthread.c |
/*
* Copyright (c) 2021 Alexey Dobriyan <[email protected]>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
// Test that /proc/*/task never contains "0".
#include <sys/types.h>
#include <dirent.h>
#include <signal.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <pthread.h>
static pid_t pid = -1;
static void atexit_hook(void)
{
if (pid > 0) {
kill(pid, SIGKILL);
}
}
static void *f(void *_)
{
return NULL;
}
static void sigalrm(int _)
{
exit(0);
}
int main(void)
{
pid = fork();
if (pid == 0) {
/* child */
while (1) {
pthread_t pth;
pthread_create(&pth, NULL, f, NULL);
pthread_join(pth, NULL);
}
} else if (pid > 0) {
/* parent */
atexit(atexit_hook);
char buf[64];
snprintf(buf, sizeof(buf), "/proc/%u/task", pid);
signal(SIGALRM, sigalrm);
alarm(1);
while (1) {
DIR *d = opendir(buf);
struct dirent *de;
while ((de = readdir(d))) {
if (strcmp(de->d_name, "0") == 0) {
exit(1);
}
}
closedir(d);
}
return 0;
} else {
perror("fork");
return 1;
}
}
| linux-master | tools/testing/selftests/proc/proc-tid0.c |
/*
* Copyright © 2018 Alexey Dobriyan <[email protected]>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
#include <unistd.h>
#include <sys/syscall.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <errno.h>
#include <string.h>
#include <stdio.h>
static inline ssize_t sys_read(int fd, void *buf, size_t len)
{
return syscall(SYS_read, fd, buf, len);
}
int main(void)
{
char buf1[64];
char buf2[64];
int fd;
ssize_t rv;
fd = open("/proc/self/syscall", O_RDONLY);
if (fd == -1) {
if (errno == ENOENT)
return 4;
return 1;
}
/* Do direct system call as libc can wrap anything. */
snprintf(buf1, sizeof(buf1), "%ld 0x%lx 0x%lx 0x%lx",
(long)SYS_read, (long)fd, (long)buf2, (long)sizeof(buf2));
memset(buf2, 0, sizeof(buf2));
rv = sys_read(fd, buf2, sizeof(buf2));
if (rv < 0)
return 1;
if (rv < strlen(buf1))
return 1;
if (strncmp(buf1, buf2, strlen(buf1)) != 0)
return 1;
return 0;
}
| linux-master | tools/testing/selftests/proc/proc-self-syscall.c |
// SPDX-License-Identifier: GPL-2.0
#define _GNU_SOURCE
#include <errno.h>
#include <fcntl.h>
#include <sched.h>
#include <stdio.h>
#include <stdbool.h>
#include <sys/stat.h>
#include <sys/syscall.h>
#include <sys/types.h>
#include <sys/wait.h>
#include <time.h>
#include <unistd.h>
#include <string.h>
#include <pthread.h>
#include "log.h"
#include "timens.h"
#define OFFSET (36000)
struct thread_args {
char *tst_name;
struct timespec *now;
};
static void *tcheck(void *_args)
{
struct thread_args *args = _args;
struct timespec *now = args->now, tst;
int i;
for (i = 0; i < 2; i++) {
_gettime(CLOCK_MONOTONIC, &tst, i);
if (abs(tst.tv_sec - now->tv_sec) > 5) {
pr_fail("%s: in-thread: unexpected value: %ld (%ld)\n",
args->tst_name, tst.tv_sec, now->tv_sec);
return (void *)1UL;
}
}
return NULL;
}
static int check_in_thread(char *tst_name, struct timespec *now)
{
struct thread_args args = {
.tst_name = tst_name,
.now = now,
};
pthread_t th;
void *retval;
if (pthread_create(&th, NULL, tcheck, &args))
return pr_perror("thread");
if (pthread_join(th, &retval))
return pr_perror("pthread_join");
return !(retval == NULL);
}
static int check(char *tst_name, struct timespec *now)
{
struct timespec tst;
int i;
for (i = 0; i < 2; i++) {
_gettime(CLOCK_MONOTONIC, &tst, i);
if (abs(tst.tv_sec - now->tv_sec) > 5)
return pr_fail("%s: unexpected value: %ld (%ld)\n",
tst_name, tst.tv_sec, now->tv_sec);
}
if (check_in_thread(tst_name, now))
return 1;
ksft_test_result_pass("%s\n", tst_name);
return 0;
}
int main(int argc, char *argv[])
{
struct timespec now;
int status;
pid_t pid;
if (argc > 1) {
char *endptr;
ksft_cnt.ksft_pass = 1;
now.tv_sec = strtoul(argv[1], &endptr, 0);
if (*endptr != 0)
return pr_perror("strtoul");
return check("child after exec", &now);
}
nscheck();
ksft_set_plan(4);
clock_gettime(CLOCK_MONOTONIC, &now);
if (unshare_timens())
return 1;
if (_settime(CLOCK_MONOTONIC, OFFSET))
return 1;
if (check("parent before vfork", &now))
return 1;
pid = vfork();
if (pid < 0)
return pr_perror("fork");
if (pid == 0) {
char now_str[64];
char *cargv[] = {"exec", now_str, NULL};
char *cenv[] = {NULL};
/* Check for proper vvar offsets after execve. */
snprintf(now_str, sizeof(now_str), "%ld", now.tv_sec + OFFSET);
execve("/proc/self/exe", cargv, cenv);
pr_perror("execve");
_exit(1);
}
if (waitpid(pid, &status, 0) != pid)
return pr_perror("waitpid");
if (status)
ksft_exit_fail();
ksft_inc_pass_cnt();
ksft_test_result_pass("wait for child\n");
/* Check that we are still in the source timens. */
if (check("parent after vfork", &now))
return 1;
ksft_exit_pass();
return 0;
}
| linux-master | tools/testing/selftests/timens/vfork_exec.c |
// SPDX-License-Identifier: GPL-2.0
#define _GNU_SOURCE
#include <sched.h>
#include <sys/timerfd.h>
#include <sys/syscall.h>
#include <time.h>
#include <unistd.h>
#include <stdlib.h>
#include <stdio.h>
#include <stdint.h>
#include <pthread.h>
#include <signal.h>
#include <string.h>
#include "log.h"
#include "timens.h"
void test_sig(int sig)
{
if (sig == SIGUSR2)
pthread_exit(NULL);
}
struct thread_args {
struct timespec *now, *rem;
pthread_mutex_t *lock;
int clockid;
int abs;
};
void *call_nanosleep(void *_args)
{
struct thread_args *args = _args;
clock_nanosleep(args->clockid, args->abs ? TIMER_ABSTIME : 0, args->now, args->rem);
pthread_mutex_unlock(args->lock);
return NULL;
}
int run_test(int clockid, int abs)
{
struct timespec now = {}, rem;
struct thread_args args = { .now = &now, .rem = &rem, .clockid = clockid};
struct timespec start;
pthread_mutex_t lock;
pthread_t thread;
int j, ok, ret;
signal(SIGUSR1, test_sig);
signal(SIGUSR2, test_sig);
pthread_mutex_init(&lock, NULL);
pthread_mutex_lock(&lock);
if (clock_gettime(clockid, &start) == -1) {
if (errno == EINVAL && check_skip(clockid))
return 0;
return pr_perror("clock_gettime");
}
if (abs) {
now.tv_sec = start.tv_sec;
now.tv_nsec = start.tv_nsec;
}
now.tv_sec += 3600;
args.abs = abs;
args.lock = &lock;
ret = pthread_create(&thread, NULL, call_nanosleep, &args);
if (ret != 0) {
pr_err("Unable to create a thread: %s", strerror(ret));
return 1;
}
/* Wait when the thread will call clock_nanosleep(). */
ok = 0;
for (j = 0; j < 8; j++) {
/* The maximum timeout is about 5 seconds. */
usleep(10000 << j);
/* Try to interrupt clock_nanosleep(). */
pthread_kill(thread, SIGUSR1);
usleep(10000 << j);
/* Check whether clock_nanosleep() has been interrupted or not. */
if (pthread_mutex_trylock(&lock) == 0) {
/**/
ok = 1;
break;
}
}
if (!ok)
pthread_kill(thread, SIGUSR2);
pthread_join(thread, NULL);
pthread_mutex_destroy(&lock);
if (!ok) {
ksft_test_result_pass("clockid: %d abs:%d timeout\n", clockid, abs);
return 1;
}
if (rem.tv_sec < 3300 || rem.tv_sec > 3900) {
pr_fail("clockid: %d abs: %d remain: %ld\n",
clockid, abs, rem.tv_sec);
return 1;
}
ksft_test_result_pass("clockid: %d abs:%d\n", clockid, abs);
return 0;
}
int main(int argc, char *argv[])
{
int ret, nsfd;
nscheck();
ksft_set_plan(4);
check_supported_timers();
if (unshare_timens())
return 1;
if (_settime(CLOCK_MONOTONIC, 7 * 24 * 3600))
return 1;
if (_settime(CLOCK_BOOTTIME, 9 * 24 * 3600))
return 1;
nsfd = open("/proc/self/ns/time_for_children", O_RDONLY);
if (nsfd < 0)
return pr_perror("Unable to open timens_for_children");
if (setns(nsfd, CLONE_NEWTIME))
return pr_perror("Unable to set timens");
ret = 0;
ret |= run_test(CLOCK_MONOTONIC, 0);
ret |= run_test(CLOCK_MONOTONIC, 1);
ret |= run_test(CLOCK_BOOTTIME_ALARM, 0);
ret |= run_test(CLOCK_BOOTTIME_ALARM, 1);
if (ret)
ksft_exit_fail();
ksft_exit_pass();
return ret;
}
| linux-master | tools/testing/selftests/timens/clock_nanosleep.c |
// SPDX-License-Identifier: GPL-2.0
#define _GNU_SOURCE
#include <sched.h>
#include <sys/syscall.h>
#include <sys/types.h>
#include <sys/wait.h>
#include <time.h>
#include <unistd.h>
#include <stdlib.h>
#include <stdio.h>
#include <stdint.h>
#include <signal.h>
#include "log.h"
#include "timens.h"
int run_test(int clockid, struct timespec now)
{
struct itimerspec new_value;
long long elapsed;
timer_t fd;
int i;
if (check_skip(clockid))
return 0;
for (i = 0; i < 2; i++) {
struct sigevent sevp = {.sigev_notify = SIGEV_NONE};
int flags = 0;
new_value.it_value.tv_sec = 3600;
new_value.it_value.tv_nsec = 0;
new_value.it_interval.tv_sec = 1;
new_value.it_interval.tv_nsec = 0;
if (i == 1) {
new_value.it_value.tv_sec += now.tv_sec;
new_value.it_value.tv_nsec += now.tv_nsec;
}
if (timer_create(clockid, &sevp, &fd) == -1) {
if (errno == ENOSYS) {
ksft_test_result_skip("Posix Clocks & timers are supported\n");
return 0;
}
return pr_perror("timerfd_create");
}
if (i == 1)
flags |= TIMER_ABSTIME;
if (timer_settime(fd, flags, &new_value, NULL) == -1)
return pr_perror("timerfd_settime");
if (timer_gettime(fd, &new_value) == -1)
return pr_perror("timerfd_gettime");
elapsed = new_value.it_value.tv_sec;
if (abs(elapsed - 3600) > 60) {
ksft_test_result_fail("clockid: %d elapsed: %lld\n",
clockid, elapsed);
return 1;
}
}
ksft_test_result_pass("clockid=%d\n", clockid);
return 0;
}
int main(int argc, char *argv[])
{
int ret, status, len, fd;
char buf[4096];
pid_t pid;
struct timespec btime_now, mtime_now;
nscheck();
check_supported_timers();
ksft_set_plan(3);
clock_gettime(CLOCK_MONOTONIC, &mtime_now);
clock_gettime(CLOCK_BOOTTIME, &btime_now);
if (unshare_timens())
return 1;
len = snprintf(buf, sizeof(buf), "%d %d 0\n%d %d 0",
CLOCK_MONOTONIC, 70 * 24 * 3600,
CLOCK_BOOTTIME, 9 * 24 * 3600);
fd = open("/proc/self/timens_offsets", O_WRONLY);
if (fd < 0)
return pr_perror("/proc/self/timens_offsets");
if (write(fd, buf, len) != len)
return pr_perror("/proc/self/timens_offsets");
close(fd);
mtime_now.tv_sec += 70 * 24 * 3600;
btime_now.tv_sec += 9 * 24 * 3600;
pid = fork();
if (pid < 0)
return pr_perror("Unable to fork");
if (pid == 0) {
ret = 0;
ret |= run_test(CLOCK_BOOTTIME, btime_now);
ret |= run_test(CLOCK_MONOTONIC, mtime_now);
ret |= run_test(CLOCK_BOOTTIME_ALARM, btime_now);
if (ret)
ksft_exit_fail();
ksft_exit_pass();
return ret;
}
if (waitpid(pid, &status, 0) != pid)
return pr_perror("Unable to wait the child process");
if (WIFEXITED(status))
return WEXITSTATUS(status);
return 1;
}
| linux-master | tools/testing/selftests/timens/timer.c |
// SPDX-License-Identifier: GPL-2.0
#define _GNU_SOURCE
#include <errno.h>
#include <fcntl.h>
#include <sched.h>
#include <stdio.h>
#include <stdbool.h>
#include <sys/stat.h>
#include <sys/syscall.h>
#include <sys/types.h>
#include <sys/wait.h>
#include <time.h>
#include <unistd.h>
#include <string.h>
#include "log.h"
#include "timens.h"
#define OFFSET (36000)
int main(int argc, char *argv[])
{
struct timespec now, tst;
int status, i;
pid_t pid;
if (argc > 1) {
if (sscanf(argv[1], "%ld", &now.tv_sec) != 1)
return pr_perror("sscanf");
for (i = 0; i < 2; i++) {
_gettime(CLOCK_MONOTONIC, &tst, i);
if (abs(tst.tv_sec - now.tv_sec) > 5)
return pr_fail("%ld %ld\n", now.tv_sec, tst.tv_sec);
}
return 0;
}
nscheck();
ksft_set_plan(1);
clock_gettime(CLOCK_MONOTONIC, &now);
if (unshare_timens())
return 1;
if (_settime(CLOCK_MONOTONIC, OFFSET))
return 1;
for (i = 0; i < 2; i++) {
_gettime(CLOCK_MONOTONIC, &tst, i);
if (abs(tst.tv_sec - now.tv_sec) > 5)
return pr_fail("%ld %ld\n",
now.tv_sec, tst.tv_sec);
}
if (argc > 1)
return 0;
pid = fork();
if (pid < 0)
return pr_perror("fork");
if (pid == 0) {
char now_str[64];
char *cargv[] = {"exec", now_str, NULL};
char *cenv[] = {NULL};
/* Check that a child process is in the new timens. */
for (i = 0; i < 2; i++) {
_gettime(CLOCK_MONOTONIC, &tst, i);
if (abs(tst.tv_sec - now.tv_sec - OFFSET) > 5)
return pr_fail("%ld %ld\n",
now.tv_sec + OFFSET, tst.tv_sec);
}
/* Check for proper vvar offsets after execve. */
snprintf(now_str, sizeof(now_str), "%ld", now.tv_sec + OFFSET);
execve("/proc/self/exe", cargv, cenv);
return pr_perror("execve");
}
if (waitpid(pid, &status, 0) != pid)
return pr_perror("waitpid");
if (status)
ksft_exit_fail();
ksft_test_result_pass("exec\n");
ksft_exit_pass();
return 0;
}
| linux-master | tools/testing/selftests/timens/exec.c |
// SPDX-License-Identifier: GPL-2.0
#define _GNU_SOURCE
#include <sys/types.h>
#include <sys/stat.h>
#include <errno.h>
#include <fcntl.h>
#include <sched.h>
#include <time.h>
#include <stdio.h>
#include <unistd.h>
#include <sys/syscall.h>
#include <dlfcn.h>
#include "log.h"
#include "timens.h"
typedef int (*vgettime_t)(clockid_t, struct timespec *);
vgettime_t vdso_clock_gettime;
static void fill_function_pointers(void)
{
void *vdso = dlopen("linux-vdso.so.1",
RTLD_LAZY | RTLD_LOCAL | RTLD_NOLOAD);
if (!vdso)
vdso = dlopen("linux-gate.so.1",
RTLD_LAZY | RTLD_LOCAL | RTLD_NOLOAD);
if (!vdso)
vdso = dlopen("linux-vdso32.so.1",
RTLD_LAZY | RTLD_LOCAL | RTLD_NOLOAD);
if (!vdso)
vdso = dlopen("linux-vdso64.so.1",
RTLD_LAZY | RTLD_LOCAL | RTLD_NOLOAD);
if (!vdso) {
pr_err("[WARN]\tfailed to find vDSO\n");
return;
}
vdso_clock_gettime = (vgettime_t)dlsym(vdso, "__vdso_clock_gettime");
if (!vdso_clock_gettime)
vdso_clock_gettime = (vgettime_t)dlsym(vdso, "__kernel_clock_gettime");
if (!vdso_clock_gettime)
pr_err("Warning: failed to find clock_gettime in vDSO\n");
}
static void test(clock_t clockid, char *clockstr, bool in_ns)
{
struct timespec tp, start;
long i = 0;
const int timeout = 3;
vdso_clock_gettime(clockid, &start);
tp = start;
for (tp = start; start.tv_sec + timeout > tp.tv_sec ||
(start.tv_sec + timeout == tp.tv_sec &&
start.tv_nsec > tp.tv_nsec); i++) {
vdso_clock_gettime(clockid, &tp);
}
ksft_test_result_pass("%s:\tclock: %10s\tcycles:\t%10ld\n",
in_ns ? "ns" : "host", clockstr, i);
}
int main(int argc, char *argv[])
{
time_t offset = 10;
int nsfd;
ksft_set_plan(8);
fill_function_pointers();
test(CLOCK_MONOTONIC, "monotonic", false);
test(CLOCK_MONOTONIC_COARSE, "monotonic-coarse", false);
test(CLOCK_MONOTONIC_RAW, "monotonic-raw", false);
test(CLOCK_BOOTTIME, "boottime", false);
nscheck();
if (unshare_timens())
return 1;
nsfd = open("/proc/self/ns/time_for_children", O_RDONLY);
if (nsfd < 0)
return pr_perror("Can't open a time namespace");
if (_settime(CLOCK_MONOTONIC, offset))
return 1;
if (_settime(CLOCK_BOOTTIME, offset))
return 1;
if (setns(nsfd, CLONE_NEWTIME))
return pr_perror("setns");
test(CLOCK_MONOTONIC, "monotonic", true);
test(CLOCK_MONOTONIC_COARSE, "monotonic-coarse", true);
test(CLOCK_MONOTONIC_RAW, "monotonic-raw", true);
test(CLOCK_BOOTTIME, "boottime", true);
ksft_exit_pass();
return 0;
}
| linux-master | tools/testing/selftests/timens/gettime_perf.c |
// SPDX-License-Identifier: GPL-2.0
#define _GNU_SOURCE
#include <sched.h>
#include <sys/timerfd.h>
#include <sys/syscall.h>
#include <sys/types.h>
#include <sys/wait.h>
#include <time.h>
#include <unistd.h>
#include <stdlib.h>
#include <stdio.h>
#include <stdint.h>
#include "log.h"
#include "timens.h"
static int tclock_gettime(clock_t clockid, struct timespec *now)
{
if (clockid == CLOCK_BOOTTIME_ALARM)
clockid = CLOCK_BOOTTIME;
return clock_gettime(clockid, now);
}
int run_test(int clockid, struct timespec now)
{
struct itimerspec new_value;
long long elapsed;
int fd, i;
if (check_skip(clockid))
return 0;
if (tclock_gettime(clockid, &now))
return pr_perror("clock_gettime(%d)", clockid);
for (i = 0; i < 2; i++) {
int flags = 0;
new_value.it_value.tv_sec = 3600;
new_value.it_value.tv_nsec = 0;
new_value.it_interval.tv_sec = 1;
new_value.it_interval.tv_nsec = 0;
if (i == 1) {
new_value.it_value.tv_sec += now.tv_sec;
new_value.it_value.tv_nsec += now.tv_nsec;
}
fd = timerfd_create(clockid, 0);
if (fd == -1)
return pr_perror("timerfd_create(%d)", clockid);
if (i == 1)
flags |= TFD_TIMER_ABSTIME;
if (timerfd_settime(fd, flags, &new_value, NULL))
return pr_perror("timerfd_settime(%d)", clockid);
if (timerfd_gettime(fd, &new_value))
return pr_perror("timerfd_gettime(%d)", clockid);
elapsed = new_value.it_value.tv_sec;
if (abs(elapsed - 3600) > 60) {
ksft_test_result_fail("clockid: %d elapsed: %lld\n",
clockid, elapsed);
return 1;
}
close(fd);
}
ksft_test_result_pass("clockid=%d\n", clockid);
return 0;
}
int main(int argc, char *argv[])
{
int ret, status, len, fd;
char buf[4096];
pid_t pid;
struct timespec btime_now, mtime_now;
nscheck();
check_supported_timers();
ksft_set_plan(3);
clock_gettime(CLOCK_MONOTONIC, &mtime_now);
clock_gettime(CLOCK_BOOTTIME, &btime_now);
if (unshare_timens())
return 1;
len = snprintf(buf, sizeof(buf), "%d %d 0\n%d %d 0",
CLOCK_MONOTONIC, 70 * 24 * 3600,
CLOCK_BOOTTIME, 9 * 24 * 3600);
fd = open("/proc/self/timens_offsets", O_WRONLY);
if (fd < 0)
return pr_perror("/proc/self/timens_offsets");
if (write(fd, buf, len) != len)
return pr_perror("/proc/self/timens_offsets");
close(fd);
mtime_now.tv_sec += 70 * 24 * 3600;
btime_now.tv_sec += 9 * 24 * 3600;
pid = fork();
if (pid < 0)
return pr_perror("Unable to fork");
if (pid == 0) {
ret = 0;
ret |= run_test(CLOCK_BOOTTIME, btime_now);
ret |= run_test(CLOCK_MONOTONIC, mtime_now);
ret |= run_test(CLOCK_BOOTTIME_ALARM, btime_now);
if (ret)
ksft_exit_fail();
ksft_exit_pass();
return ret;
}
if (waitpid(pid, &status, 0) != pid)
return pr_perror("Unable to wait the child process");
if (WIFEXITED(status))
return WEXITSTATUS(status);
return 1;
}
| linux-master | tools/testing/selftests/timens/timerfd.c |
// SPDX-License-Identifier: GPL-2.0
#define _GNU_SOURCE
#include <errno.h>
#include <fcntl.h>
#include <sched.h>
#include <stdio.h>
#include <stdbool.h>
#include <sys/stat.h>
#include <sys/syscall.h>
#include <sys/types.h>
#include <time.h>
#include <unistd.h>
#include <string.h>
#include "log.h"
#include "timens.h"
/*
* Test shouldn't be run for a day, so add 10 days to child
* time and check parent's time to be in the same day.
*/
#define DAY_IN_SEC (60*60*24)
#define TEN_DAYS_IN_SEC (10*DAY_IN_SEC)
struct test_clock {
clockid_t id;
char *name;
/*
* off_id is -1 if a clock has own offset, or it contains an index
* which contains a right offset of this clock.
*/
int off_id;
time_t offset;
};
#define ct(clock, off_id) { clock, #clock, off_id }
static struct test_clock clocks[] = {
ct(CLOCK_BOOTTIME, -1),
ct(CLOCK_BOOTTIME_ALARM, 1),
ct(CLOCK_MONOTONIC, -1),
ct(CLOCK_MONOTONIC_COARSE, 1),
ct(CLOCK_MONOTONIC_RAW, 1),
};
#undef ct
static int child_ns, parent_ns = -1;
static int switch_ns(int fd)
{
if (setns(fd, CLONE_NEWTIME)) {
pr_perror("setns()");
return -1;
}
return 0;
}
static int init_namespaces(void)
{
char path[] = "/proc/self/ns/time_for_children";
struct stat st1, st2;
if (parent_ns == -1) {
parent_ns = open(path, O_RDONLY);
if (parent_ns <= 0)
return pr_perror("Unable to open %s", path);
}
if (fstat(parent_ns, &st1))
return pr_perror("Unable to stat the parent timens");
if (unshare_timens())
return -1;
child_ns = open(path, O_RDONLY);
if (child_ns <= 0)
return pr_perror("Unable to open %s", path);
if (fstat(child_ns, &st2))
return pr_perror("Unable to stat the timens");
if (st1.st_ino == st2.st_ino)
return pr_perror("The same child_ns after CLONE_NEWTIME");
return 0;
}
static int test_gettime(clockid_t clock_index, bool raw_syscall, time_t offset)
{
struct timespec child_ts_new, parent_ts_old, cur_ts;
char *entry = raw_syscall ? "syscall" : "vdso";
double precision = 0.0;
if (check_skip(clocks[clock_index].id))
return 0;
switch (clocks[clock_index].id) {
case CLOCK_MONOTONIC_COARSE:
case CLOCK_MONOTONIC_RAW:
precision = -2.0;
break;
}
if (switch_ns(parent_ns))
return pr_err("switch_ns(%d)", child_ns);
if (_gettime(clocks[clock_index].id, &parent_ts_old, raw_syscall))
return -1;
child_ts_new.tv_nsec = parent_ts_old.tv_nsec;
child_ts_new.tv_sec = parent_ts_old.tv_sec + offset;
if (switch_ns(child_ns))
return pr_err("switch_ns(%d)", child_ns);
if (_gettime(clocks[clock_index].id, &cur_ts, raw_syscall))
return -1;
if (difftime(cur_ts.tv_sec, child_ts_new.tv_sec) < precision) {
ksft_test_result_fail(
"Child's %s (%s) time has not changed: %lu -> %lu [%lu]\n",
clocks[clock_index].name, entry, parent_ts_old.tv_sec,
child_ts_new.tv_sec, cur_ts.tv_sec);
return -1;
}
if (switch_ns(parent_ns))
return pr_err("switch_ns(%d)", parent_ns);
if (_gettime(clocks[clock_index].id, &cur_ts, raw_syscall))
return -1;
if (difftime(cur_ts.tv_sec, parent_ts_old.tv_sec) > DAY_IN_SEC) {
ksft_test_result_fail(
"Parent's %s (%s) time has changed: %lu -> %lu [%lu]\n",
clocks[clock_index].name, entry, parent_ts_old.tv_sec,
child_ts_new.tv_sec, cur_ts.tv_sec);
/* Let's play nice and put it closer to original */
clock_settime(clocks[clock_index].id, &cur_ts);
return -1;
}
ksft_test_result_pass("Passed for %s (%s)\n",
clocks[clock_index].name, entry);
return 0;
}
int main(int argc, char *argv[])
{
unsigned int i;
time_t offset;
int ret = 0;
nscheck();
check_supported_timers();
ksft_set_plan(ARRAY_SIZE(clocks) * 2);
if (init_namespaces())
return 1;
/* Offsets have to be set before tasks enter the namespace. */
for (i = 0; i < ARRAY_SIZE(clocks); i++) {
if (clocks[i].off_id != -1)
continue;
offset = TEN_DAYS_IN_SEC + i * 1000;
clocks[i].offset = offset;
if (_settime(clocks[i].id, offset))
return 1;
}
for (i = 0; i < ARRAY_SIZE(clocks); i++) {
if (clocks[i].off_id != -1)
offset = clocks[clocks[i].off_id].offset;
else
offset = clocks[i].offset;
ret |= test_gettime(i, true, offset);
ret |= test_gettime(i, false, offset);
}
if (ret)
ksft_exit_fail();
ksft_exit_pass();
return !!ret;
}
| linux-master | tools/testing/selftests/timens/timens.c |
// SPDX-License-Identifier: GPL-2.0
#define _GNU_SOURCE
#include <errno.h>
#include <fcntl.h>
#include <math.h>
#include <sched.h>
#include <stdio.h>
#include <stdbool.h>
#include <stdlib.h>
#include <sys/stat.h>
#include <sys/syscall.h>
#include <sys/types.h>
#include <time.h>
#include <unistd.h>
#include "log.h"
#include "timens.h"
/*
* Test shouldn't be run for a day, so add 10 days to child
* time and check parent's time to be in the same day.
*/
#define MAX_TEST_TIME_SEC (60*5)
#define DAY_IN_SEC (60*60*24)
#define TEN_DAYS_IN_SEC (10*DAY_IN_SEC)
static int child_ns, parent_ns;
static int switch_ns(int fd)
{
if (setns(fd, CLONE_NEWTIME))
return pr_perror("setns()");
return 0;
}
static int init_namespaces(void)
{
char path[] = "/proc/self/ns/time_for_children";
struct stat st1, st2;
parent_ns = open(path, O_RDONLY);
if (parent_ns <= 0)
return pr_perror("Unable to open %s", path);
if (fstat(parent_ns, &st1))
return pr_perror("Unable to stat the parent timens");
if (unshare_timens())
return -1;
child_ns = open(path, O_RDONLY);
if (child_ns <= 0)
return pr_perror("Unable to open %s", path);
if (fstat(child_ns, &st2))
return pr_perror("Unable to stat the timens");
if (st1.st_ino == st2.st_ino)
return pr_err("The same child_ns after CLONE_NEWTIME");
if (_settime(CLOCK_BOOTTIME, TEN_DAYS_IN_SEC))
return -1;
return 0;
}
static int read_proc_uptime(struct timespec *uptime)
{
unsigned long up_sec, up_nsec;
FILE *proc;
proc = fopen("/proc/uptime", "r");
if (proc == NULL) {
pr_perror("Unable to open /proc/uptime");
return -1;
}
if (fscanf(proc, "%lu.%02lu", &up_sec, &up_nsec) != 2) {
if (errno) {
pr_perror("fscanf");
return -errno;
}
pr_err("failed to parse /proc/uptime");
return -1;
}
fclose(proc);
uptime->tv_sec = up_sec;
uptime->tv_nsec = up_nsec;
return 0;
}
static int read_proc_stat_btime(unsigned long long *boottime_sec)
{
FILE *proc;
char line_buf[2048];
proc = fopen("/proc/stat", "r");
if (proc == NULL) {
pr_perror("Unable to open /proc/stat");
return -1;
}
while (fgets(line_buf, 2048, proc)) {
if (sscanf(line_buf, "btime %llu", boottime_sec) != 1)
continue;
fclose(proc);
return 0;
}
if (errno) {
pr_perror("fscanf");
fclose(proc);
return -errno;
}
pr_err("failed to parse /proc/stat");
fclose(proc);
return -1;
}
static int check_uptime(void)
{
struct timespec uptime_new, uptime_old;
time_t uptime_expected;
double prec = MAX_TEST_TIME_SEC;
if (switch_ns(parent_ns))
return pr_err("switch_ns(%d)", parent_ns);
if (read_proc_uptime(&uptime_old))
return 1;
if (switch_ns(child_ns))
return pr_err("switch_ns(%d)", child_ns);
if (read_proc_uptime(&uptime_new))
return 1;
uptime_expected = uptime_old.tv_sec + TEN_DAYS_IN_SEC;
if (fabs(difftime(uptime_new.tv_sec, uptime_expected)) > prec) {
pr_fail("uptime in /proc/uptime: old %ld, new %ld [%ld]",
uptime_old.tv_sec, uptime_new.tv_sec,
uptime_old.tv_sec + TEN_DAYS_IN_SEC);
return 1;
}
ksft_test_result_pass("Passed for /proc/uptime\n");
return 0;
}
static int check_stat_btime(void)
{
unsigned long long btime_new, btime_old;
unsigned long long btime_expected;
if (switch_ns(parent_ns))
return pr_err("switch_ns(%d)", parent_ns);
if (read_proc_stat_btime(&btime_old))
return 1;
if (switch_ns(child_ns))
return pr_err("switch_ns(%d)", child_ns);
if (read_proc_stat_btime(&btime_new))
return 1;
btime_expected = btime_old - TEN_DAYS_IN_SEC;
if (btime_new != btime_expected) {
pr_fail("btime in /proc/stat: old %llu, new %llu [%llu]",
btime_old, btime_new, btime_expected);
return 1;
}
ksft_test_result_pass("Passed for /proc/stat btime\n");
return 0;
}
int main(int argc, char *argv[])
{
int ret = 0;
nscheck();
ksft_set_plan(2);
if (init_namespaces())
return 1;
ret |= check_uptime();
ret |= check_stat_btime();
if (ret)
ksft_exit_fail();
ksft_exit_pass();
return ret;
}
| linux-master | tools/testing/selftests/timens/procfs.c |
// SPDX-License-Identifier: GPL-2.0
#define _GNU_SOURCE
#include <sched.h>
#include <linux/unistd.h>
#include <linux/futex.h>
#include <stdio.h>
#include <string.h>
#include <sys/syscall.h>
#include <sys/types.h>
#include <sys/wait.h>
#include <time.h>
#include <unistd.h>
#include "log.h"
#include "timens.h"
#define NSEC_PER_SEC 1000000000ULL
static int run_test(int clockid)
{
int futex_op = FUTEX_WAIT_BITSET;
struct timespec timeout, end;
int val = 0;
if (clockid == CLOCK_REALTIME)
futex_op |= FUTEX_CLOCK_REALTIME;
clock_gettime(clockid, &timeout);
timeout.tv_nsec += NSEC_PER_SEC / 10; // 100ms
if (timeout.tv_nsec > NSEC_PER_SEC) {
timeout.tv_sec++;
timeout.tv_nsec -= NSEC_PER_SEC;
}
if (syscall(__NR_futex, &val, futex_op, 0,
&timeout, 0, FUTEX_BITSET_MATCH_ANY) >= 0) {
ksft_test_result_fail("futex didn't return ETIMEDOUT\n");
return 1;
}
if (errno != ETIMEDOUT) {
ksft_test_result_fail("futex didn't return ETIMEDOUT: %s\n",
strerror(errno));
return 1;
}
clock_gettime(clockid, &end);
if (end.tv_sec < timeout.tv_sec ||
(end.tv_sec == timeout.tv_sec && end.tv_nsec < timeout.tv_nsec)) {
ksft_test_result_fail("futex slept less than 100ms\n");
return 1;
}
ksft_test_result_pass("futex with the %d clockid\n", clockid);
return 0;
}
int main(int argc, char *argv[])
{
int status, len, fd;
char buf[4096];
pid_t pid;
struct timespec mtime_now;
nscheck();
ksft_set_plan(2);
clock_gettime(CLOCK_MONOTONIC, &mtime_now);
if (unshare_timens())
return 1;
len = snprintf(buf, sizeof(buf), "%d %d 0",
CLOCK_MONOTONIC, 70 * 24 * 3600);
fd = open("/proc/self/timens_offsets", O_WRONLY);
if (fd < 0)
return pr_perror("/proc/self/timens_offsets");
if (write(fd, buf, len) != len)
return pr_perror("/proc/self/timens_offsets");
close(fd);
pid = fork();
if (pid < 0)
return pr_perror("Unable to fork");
if (pid == 0) {
int ret = 0;
ret |= run_test(CLOCK_REALTIME);
ret |= run_test(CLOCK_MONOTONIC);
if (ret)
ksft_exit_fail();
ksft_exit_pass();
return 0;
}
if (waitpid(pid, &status, 0) != pid)
return pr_perror("Unable to wait the child process");
if (WIFEXITED(status))
return WEXITSTATUS(status);
return 1;
}
| linux-master | tools/testing/selftests/timens/futex.c |
// SPDX-License-Identifier: GPL-2.0-or-later
/******************************************************************************
*
* Copyright © International Business Machines Corp., 2009
*
* DESCRIPTION
* Block on a futex and wait for timeout.
*
* AUTHOR
* Darren Hart <[email protected]>
*
* HISTORY
* 2009-Nov-6: Initial version by Darren Hart <[email protected]>
* 2021-Apr-26: More test cases by André Almeida <[email protected]>
*
*****************************************************************************/
#include <pthread.h>
#include "futextest.h"
#include "futex2test.h"
#include "logging.h"
#define TEST_NAME "futex-wait-timeout"
static long timeout_ns = 100000; /* 100us default timeout */
static futex_t futex_pi;
static pthread_barrier_t barrier;
void usage(char *prog)
{
printf("Usage: %s\n", prog);
printf(" -c Use color\n");
printf(" -h Display this help message\n");
printf(" -t N Timeout in nanoseconds (default: 100,000)\n");
printf(" -v L Verbosity level: %d=QUIET %d=CRITICAL %d=INFO\n",
VQUIET, VCRITICAL, VINFO);
}
/*
* Get a PI lock and hold it forever, so the main thread lock_pi will block
* and we can test the timeout
*/
void *get_pi_lock(void *arg)
{
int ret;
volatile futex_t lock = 0;
ret = futex_lock_pi(&futex_pi, NULL, 0, 0);
if (ret != 0)
error("futex_lock_pi failed\n", ret);
pthread_barrier_wait(&barrier);
/* Blocks forever */
ret = futex_wait(&lock, 0, NULL, 0);
error("futex_wait failed\n", ret);
return NULL;
}
/*
* Check if the function returned the expected error
*/
static void test_timeout(int res, int *ret, char *test_name, int err)
{
if (!res || errno != err) {
ksft_test_result_fail("%s returned %d\n", test_name,
res < 0 ? errno : res);
*ret = RET_FAIL;
} else {
ksft_test_result_pass("%s succeeds\n", test_name);
}
}
/*
* Calculate absolute timeout and correct overflow
*/
static int futex_get_abs_timeout(clockid_t clockid, struct timespec *to,
long timeout_ns)
{
if (clock_gettime(clockid, to)) {
error("clock_gettime failed\n", errno);
return errno;
}
to->tv_nsec += timeout_ns;
if (to->tv_nsec >= 1000000000) {
to->tv_sec++;
to->tv_nsec -= 1000000000;
}
return 0;
}
int main(int argc, char *argv[])
{
futex_t f1 = FUTEX_INITIALIZER;
int res, ret = RET_PASS;
struct timespec to;
pthread_t thread;
int c;
struct futex_waitv waitv = {
.uaddr = (uintptr_t)&f1,
.val = f1,
.flags = FUTEX_32,
.__reserved = 0
};
while ((c = getopt(argc, argv, "cht:v:")) != -1) {
switch (c) {
case 'c':
log_color(1);
break;
case 'h':
usage(basename(argv[0]));
exit(0);
case 't':
timeout_ns = atoi(optarg);
break;
case 'v':
log_verbosity(atoi(optarg));
break;
default:
usage(basename(argv[0]));
exit(1);
}
}
ksft_print_header();
ksft_set_plan(9);
ksft_print_msg("%s: Block on a futex and wait for timeout\n",
basename(argv[0]));
ksft_print_msg("\tArguments: timeout=%ldns\n", timeout_ns);
pthread_barrier_init(&barrier, NULL, 2);
pthread_create(&thread, NULL, get_pi_lock, NULL);
/* initialize relative timeout */
to.tv_sec = 0;
to.tv_nsec = timeout_ns;
res = futex_wait(&f1, f1, &to, 0);
test_timeout(res, &ret, "futex_wait relative", ETIMEDOUT);
/* FUTEX_WAIT_BITSET with CLOCK_REALTIME */
if (futex_get_abs_timeout(CLOCK_REALTIME, &to, timeout_ns))
return RET_FAIL;
res = futex_wait_bitset(&f1, f1, &to, 1, FUTEX_CLOCK_REALTIME);
test_timeout(res, &ret, "futex_wait_bitset realtime", ETIMEDOUT);
/* FUTEX_WAIT_BITSET with CLOCK_MONOTONIC */
if (futex_get_abs_timeout(CLOCK_MONOTONIC, &to, timeout_ns))
return RET_FAIL;
res = futex_wait_bitset(&f1, f1, &to, 1, 0);
test_timeout(res, &ret, "futex_wait_bitset monotonic", ETIMEDOUT);
/* FUTEX_WAIT_REQUEUE_PI with CLOCK_REALTIME */
if (futex_get_abs_timeout(CLOCK_REALTIME, &to, timeout_ns))
return RET_FAIL;
res = futex_wait_requeue_pi(&f1, f1, &futex_pi, &to, FUTEX_CLOCK_REALTIME);
test_timeout(res, &ret, "futex_wait_requeue_pi realtime", ETIMEDOUT);
/* FUTEX_WAIT_REQUEUE_PI with CLOCK_MONOTONIC */
if (futex_get_abs_timeout(CLOCK_MONOTONIC, &to, timeout_ns))
return RET_FAIL;
res = futex_wait_requeue_pi(&f1, f1, &futex_pi, &to, 0);
test_timeout(res, &ret, "futex_wait_requeue_pi monotonic", ETIMEDOUT);
/* Wait until the other thread calls futex_lock_pi() */
pthread_barrier_wait(&barrier);
pthread_barrier_destroy(&barrier);
/*
* FUTEX_LOCK_PI with CLOCK_REALTIME
* Due to historical reasons, FUTEX_LOCK_PI supports only realtime
* clock, but requires the caller to not set CLOCK_REALTIME flag.
*
* If you call FUTEX_LOCK_PI with a monotonic clock, it'll be
* interpreted as a realtime clock, and (unless you mess your machine's
* time or your time machine) the monotonic clock value is always
* smaller than realtime and the syscall will timeout immediately.
*/
if (futex_get_abs_timeout(CLOCK_REALTIME, &to, timeout_ns))
return RET_FAIL;
res = futex_lock_pi(&futex_pi, &to, 0, 0);
test_timeout(res, &ret, "futex_lock_pi realtime", ETIMEDOUT);
/* Test operations that don't support FUTEX_CLOCK_REALTIME */
res = futex_lock_pi(&futex_pi, NULL, 0, FUTEX_CLOCK_REALTIME);
test_timeout(res, &ret, "futex_lock_pi invalid timeout flag", ENOSYS);
/* futex_waitv with CLOCK_MONOTONIC */
if (futex_get_abs_timeout(CLOCK_MONOTONIC, &to, timeout_ns))
return RET_FAIL;
res = futex_waitv(&waitv, 1, 0, &to, CLOCK_MONOTONIC);
test_timeout(res, &ret, "futex_waitv monotonic", ETIMEDOUT);
/* futex_waitv with CLOCK_REALTIME */
if (futex_get_abs_timeout(CLOCK_REALTIME, &to, timeout_ns))
return RET_FAIL;
res = futex_waitv(&waitv, 1, 0, &to, CLOCK_REALTIME);
test_timeout(res, &ret, "futex_waitv realtime", ETIMEDOUT);
ksft_print_cnts();
return ret;
}
| linux-master | tools/testing/selftests/futex/functional/futex_wait_timeout.c |
// SPDX-License-Identifier: GPL-2.0-or-later
/******************************************************************************
*
* Copyright © International Business Machines Corp., 2006-2008
*
* DESCRIPTION
* This test exercises the futex_wait_requeue_pi() signal handling both
* before and after the requeue. The first should be restarted by the
* kernel. The latter should return EWOULDBLOCK to the waiter.
*
* AUTHORS
* Darren Hart <[email protected]>
*
* HISTORY
* 2008-May-5: Initial version by Darren Hart <[email protected]>
*
*****************************************************************************/
#include <errno.h>
#include <getopt.h>
#include <limits.h>
#include <pthread.h>
#include <signal.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "atomic.h"
#include "futextest.h"
#include "logging.h"
#define TEST_NAME "futex-requeue-pi-signal-restart"
#define DELAY_US 100
futex_t f1 = FUTEX_INITIALIZER;
futex_t f2 = FUTEX_INITIALIZER;
atomic_t requeued = ATOMIC_INITIALIZER;
int waiter_ret = 0;
void usage(char *prog)
{
printf("Usage: %s\n", prog);
printf(" -c Use color\n");
printf(" -h Display this help message\n");
printf(" -v L Verbosity level: %d=QUIET %d=CRITICAL %d=INFO\n",
VQUIET, VCRITICAL, VINFO);
}
int create_rt_thread(pthread_t *pth, void*(*func)(void *), void *arg,
int policy, int prio)
{
struct sched_param schedp;
pthread_attr_t attr;
int ret;
pthread_attr_init(&attr);
memset(&schedp, 0, sizeof(schedp));
ret = pthread_attr_setinheritsched(&attr, PTHREAD_EXPLICIT_SCHED);
if (ret) {
error("pthread_attr_setinheritsched\n", ret);
return -1;
}
ret = pthread_attr_setschedpolicy(&attr, policy);
if (ret) {
error("pthread_attr_setschedpolicy\n", ret);
return -1;
}
schedp.sched_priority = prio;
ret = pthread_attr_setschedparam(&attr, &schedp);
if (ret) {
error("pthread_attr_setschedparam\n", ret);
return -1;
}
ret = pthread_create(pth, &attr, func, arg);
if (ret) {
error("pthread_create\n", ret);
return -1;
}
return 0;
}
void handle_signal(int signo)
{
info("signal received %s requeue\n",
requeued.val ? "after" : "prior to");
}
void *waiterfn(void *arg)
{
unsigned int old_val;
int res;
waiter_ret = RET_PASS;
info("Waiter running\n");
info("Calling FUTEX_LOCK_PI on f2=%x @ %p\n", f2, &f2);
old_val = f1;
res = futex_wait_requeue_pi(&f1, old_val, &(f2), NULL,
FUTEX_PRIVATE_FLAG);
if (!requeued.val || errno != EWOULDBLOCK) {
fail("unexpected return from futex_wait_requeue_pi: %d (%s)\n",
res, strerror(errno));
info("w2:futex: %x\n", f2);
if (!res)
futex_unlock_pi(&f2, FUTEX_PRIVATE_FLAG);
waiter_ret = RET_FAIL;
}
info("Waiter exiting with %d\n", waiter_ret);
pthread_exit(NULL);
}
int main(int argc, char *argv[])
{
unsigned int old_val;
struct sigaction sa;
pthread_t waiter;
int c, res, ret = RET_PASS;
while ((c = getopt(argc, argv, "chv:")) != -1) {
switch (c) {
case 'c':
log_color(1);
break;
case 'h':
usage(basename(argv[0]));
exit(0);
case 'v':
log_verbosity(atoi(optarg));
break;
default:
usage(basename(argv[0]));
exit(1);
}
}
ksft_print_header();
ksft_set_plan(1);
ksft_print_msg("%s: Test signal handling during requeue_pi\n",
basename(argv[0]));
ksft_print_msg("\tArguments: <none>\n");
sa.sa_handler = handle_signal;
sigemptyset(&sa.sa_mask);
sa.sa_flags = 0;
if (sigaction(SIGUSR1, &sa, NULL)) {
error("sigaction\n", errno);
exit(1);
}
info("m1:f2: %x\n", f2);
info("Creating waiter\n");
res = create_rt_thread(&waiter, waiterfn, NULL, SCHED_FIFO, 1);
if (res) {
error("Creating waiting thread failed", res);
ret = RET_ERROR;
goto out;
}
info("Calling FUTEX_LOCK_PI on f2=%x @ %p\n", f2, &f2);
info("m2:f2: %x\n", f2);
futex_lock_pi(&f2, 0, 0, FUTEX_PRIVATE_FLAG);
info("m3:f2: %x\n", f2);
while (1) {
/*
* signal the waiter before requeue, waiter should automatically
* restart futex_wait_requeue_pi() in the kernel. Wait for the
* waiter to block on f1 again.
*/
info("Issuing SIGUSR1 to waiter\n");
pthread_kill(waiter, SIGUSR1);
usleep(DELAY_US);
info("Requeueing waiter via FUTEX_CMP_REQUEUE_PI\n");
old_val = f1;
res = futex_cmp_requeue_pi(&f1, old_val, &(f2), 1, 0,
FUTEX_PRIVATE_FLAG);
/*
* If res is non-zero, we either requeued the waiter or hit an
* error, break out and handle it. If it is zero, then the
* signal may have hit before the waiter was blocked on f1.
* Try again.
*/
if (res > 0) {
atomic_set(&requeued, 1);
break;
} else if (res < 0) {
error("FUTEX_CMP_REQUEUE_PI failed\n", errno);
ret = RET_ERROR;
break;
}
}
info("m4:f2: %x\n", f2);
/*
* Signal the waiter after requeue, waiter should return from
* futex_wait_requeue_pi() with EWOULDBLOCK. Join the thread here so the
* futex_unlock_pi() can't happen before the signal wakeup is detected
* in the kernel.
*/
info("Issuing SIGUSR1 to waiter\n");
pthread_kill(waiter, SIGUSR1);
info("Waiting for waiter to return\n");
pthread_join(waiter, NULL);
info("Calling FUTEX_UNLOCK_PI on mutex=%x @ %p\n", f2, &f2);
futex_unlock_pi(&f2, FUTEX_PRIVATE_FLAG);
info("m5:f2: %x\n", f2);
out:
if (ret == RET_PASS && waiter_ret)
ret = waiter_ret;
print_result(TEST_NAME, ret);
return ret;
}
| linux-master | tools/testing/selftests/futex/functional/futex_requeue_pi_signal_restart.c |
// SPDX-License-Identifier: GPL-2.0-or-later
/******************************************************************************
*
* Copyright FUJITSU LIMITED 2010
* Copyright KOSAKI Motohiro <[email protected]>
*
* DESCRIPTION
* Internally, Futex has two handling mode, anon and file. The private file
* mapping is special. At first it behave as file, but after write anything
* it behave as anon. This test is intent to test such case.
*
* AUTHOR
* KOSAKI Motohiro <[email protected]>
*
* HISTORY
* 2010-Jan-6: Initial version by KOSAKI Motohiro <[email protected]>
*
*****************************************************************************/
#include <stdio.h>
#include <stdlib.h>
#include <syscall.h>
#include <unistd.h>
#include <errno.h>
#include <linux/futex.h>
#include <pthread.h>
#include <libgen.h>
#include <signal.h>
#include "logging.h"
#include "futextest.h"
#define TEST_NAME "futex-wait-private-mapped-file"
#define PAGE_SZ 4096
char pad[PAGE_SZ] = {1};
futex_t val = 1;
char pad2[PAGE_SZ] = {1};
#define WAKE_WAIT_US 3000000
struct timespec wait_timeout = { .tv_sec = 5, .tv_nsec = 0};
void usage(char *prog)
{
printf("Usage: %s\n", prog);
printf(" -c Use color\n");
printf(" -h Display this help message\n");
printf(" -v L Verbosity level: %d=QUIET %d=CRITICAL %d=INFO\n",
VQUIET, VCRITICAL, VINFO);
}
void *thr_futex_wait(void *arg)
{
int ret;
info("futex wait\n");
ret = futex_wait(&val, 1, &wait_timeout, 0);
if (ret && errno != EWOULDBLOCK && errno != ETIMEDOUT) {
error("futex error.\n", errno);
print_result(TEST_NAME, RET_ERROR);
exit(RET_ERROR);
}
if (ret && errno == ETIMEDOUT)
fail("waiter timedout\n");
info("futex_wait: ret = %d, errno = %d\n", ret, errno);
return NULL;
}
int main(int argc, char **argv)
{
pthread_t thr;
int ret = RET_PASS;
int res;
int c;
while ((c = getopt(argc, argv, "chv:")) != -1) {
switch (c) {
case 'c':
log_color(1);
break;
case 'h':
usage(basename(argv[0]));
exit(0);
case 'v':
log_verbosity(atoi(optarg));
break;
default:
usage(basename(argv[0]));
exit(1);
}
}
ksft_print_header();
ksft_set_plan(1);
ksft_print_msg(
"%s: Test the futex value of private file mappings in FUTEX_WAIT\n",
basename(argv[0]));
ret = pthread_create(&thr, NULL, thr_futex_wait, NULL);
if (ret < 0) {
fprintf(stderr, "pthread_create error\n");
ret = RET_ERROR;
goto out;
}
info("wait a while\n");
usleep(WAKE_WAIT_US);
val = 2;
res = futex_wake(&val, 1, 0);
info("futex_wake %d\n", res);
if (res != 1) {
fail("FUTEX_WAKE didn't find the waiting thread.\n");
ret = RET_FAIL;
}
info("join\n");
pthread_join(thr, NULL);
out:
print_result(TEST_NAME, ret);
return ret;
}
| linux-master | tools/testing/selftests/futex/functional/futex_wait_private_mapped_file.c |
// SPDX-License-Identifier: GPL-2.0-or-later
/*
* Copyright Collabora Ltd., 2021
*
* futex cmp requeue test by André Almeida <[email protected]>
*/
#include <pthread.h>
#include <sys/shm.h>
#include <sys/mman.h>
#include <fcntl.h>
#include "logging.h"
#include "futextest.h"
#define TEST_NAME "futex-wait"
#define timeout_ns 30000000
#define WAKE_WAIT_US 10000
#define SHM_PATH "futex_shm_file"
void *futex;
void usage(char *prog)
{
printf("Usage: %s\n", prog);
printf(" -c Use color\n");
printf(" -h Display this help message\n");
printf(" -v L Verbosity level: %d=QUIET %d=CRITICAL %d=INFO\n",
VQUIET, VCRITICAL, VINFO);
}
static void *waiterfn(void *arg)
{
struct timespec to;
unsigned int flags = 0;
if (arg)
flags = *((unsigned int *) arg);
to.tv_sec = 0;
to.tv_nsec = timeout_ns;
if (futex_wait(futex, 0, &to, flags))
printf("waiter failed errno %d\n", errno);
return NULL;
}
int main(int argc, char *argv[])
{
int res, ret = RET_PASS, fd, c, shm_id;
u_int32_t f_private = 0, *shared_data;
unsigned int flags = FUTEX_PRIVATE_FLAG;
pthread_t waiter;
void *shm;
futex = &f_private;
while ((c = getopt(argc, argv, "cht:v:")) != -1) {
switch (c) {
case 'c':
log_color(1);
break;
case 'h':
usage(basename(argv[0]));
exit(0);
case 'v':
log_verbosity(atoi(optarg));
break;
default:
usage(basename(argv[0]));
exit(1);
}
}
ksft_print_header();
ksft_set_plan(3);
ksft_print_msg("%s: Test futex_wait\n", basename(argv[0]));
/* Testing a private futex */
info("Calling private futex_wait on futex: %p\n", futex);
if (pthread_create(&waiter, NULL, waiterfn, (void *) &flags))
error("pthread_create failed\n", errno);
usleep(WAKE_WAIT_US);
info("Calling private futex_wake on futex: %p\n", futex);
res = futex_wake(futex, 1, FUTEX_PRIVATE_FLAG);
if (res != 1) {
ksft_test_result_fail("futex_wake private returned: %d %s\n",
errno, strerror(errno));
ret = RET_FAIL;
} else {
ksft_test_result_pass("futex_wake private succeeds\n");
}
/* Testing an anon page shared memory */
shm_id = shmget(IPC_PRIVATE, 4096, IPC_CREAT | 0666);
if (shm_id < 0) {
perror("shmget");
exit(1);
}
shared_data = shmat(shm_id, NULL, 0);
*shared_data = 0;
futex = shared_data;
info("Calling shared (page anon) futex_wait on futex: %p\n", futex);
if (pthread_create(&waiter, NULL, waiterfn, NULL))
error("pthread_create failed\n", errno);
usleep(WAKE_WAIT_US);
info("Calling shared (page anon) futex_wake on futex: %p\n", futex);
res = futex_wake(futex, 1, 0);
if (res != 1) {
ksft_test_result_fail("futex_wake shared (page anon) returned: %d %s\n",
errno, strerror(errno));
ret = RET_FAIL;
} else {
ksft_test_result_pass("futex_wake shared (page anon) succeeds\n");
}
/* Testing a file backed shared memory */
fd = open(SHM_PATH, O_RDWR | O_CREAT, S_IRUSR | S_IWUSR);
if (fd < 0) {
perror("open");
exit(1);
}
if (ftruncate(fd, sizeof(f_private))) {
perror("ftruncate");
exit(1);
}
shm = mmap(NULL, sizeof(f_private), PROT_READ | PROT_WRITE, MAP_SHARED, fd, 0);
if (shm == MAP_FAILED) {
perror("mmap");
exit(1);
}
memcpy(shm, &f_private, sizeof(f_private));
futex = shm;
info("Calling shared (file backed) futex_wait on futex: %p\n", futex);
if (pthread_create(&waiter, NULL, waiterfn, NULL))
error("pthread_create failed\n", errno);
usleep(WAKE_WAIT_US);
info("Calling shared (file backed) futex_wake on futex: %p\n", futex);
res = futex_wake(shm, 1, 0);
if (res != 1) {
ksft_test_result_fail("futex_wake shared (file backed) returned: %d %s\n",
errno, strerror(errno));
ret = RET_FAIL;
} else {
ksft_test_result_pass("futex_wake shared (file backed) succeeds\n");
}
/* Freeing resources */
shmdt(shared_data);
munmap(shm, sizeof(f_private));
remove(SHM_PATH);
close(fd);
ksft_print_cnts();
return ret;
}
| linux-master | tools/testing/selftests/futex/functional/futex_wait.c |
// SPDX-License-Identifier: GPL-2.0-or-later
/******************************************************************************
*
* Copyright © International Business Machines Corp., 2009
*
* DESCRIPTION
* Test if FUTEX_WAIT op returns -EWOULDBLOCK if the futex value differs
* from the expected one.
*
* AUTHOR
* Gowrishankar <[email protected]>
*
* HISTORY
* 2009-Nov-14: Initial version by Gowrishankar <[email protected]>
*
*****************************************************************************/
#include <errno.h>
#include <getopt.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <time.h>
#include "futextest.h"
#include "futex2test.h"
#include "logging.h"
#define TEST_NAME "futex-wait-wouldblock"
#define timeout_ns 100000
void usage(char *prog)
{
printf("Usage: %s\n", prog);
printf(" -c Use color\n");
printf(" -h Display this help message\n");
printf(" -v L Verbosity level: %d=QUIET %d=CRITICAL %d=INFO\n",
VQUIET, VCRITICAL, VINFO);
}
int main(int argc, char *argv[])
{
struct timespec to = {.tv_sec = 0, .tv_nsec = timeout_ns};
futex_t f1 = FUTEX_INITIALIZER;
int res, ret = RET_PASS;
int c;
struct futex_waitv waitv = {
.uaddr = (uintptr_t)&f1,
.val = f1+1,
.flags = FUTEX_32,
.__reserved = 0
};
while ((c = getopt(argc, argv, "cht:v:")) != -1) {
switch (c) {
case 'c':
log_color(1);
break;
case 'h':
usage(basename(argv[0]));
exit(0);
case 'v':
log_verbosity(atoi(optarg));
break;
default:
usage(basename(argv[0]));
exit(1);
}
}
ksft_print_header();
ksft_set_plan(2);
ksft_print_msg("%s: Test the unexpected futex value in FUTEX_WAIT\n",
basename(argv[0]));
info("Calling futex_wait on f1: %u @ %p with val=%u\n", f1, &f1, f1+1);
res = futex_wait(&f1, f1+1, &to, FUTEX_PRIVATE_FLAG);
if (!res || errno != EWOULDBLOCK) {
ksft_test_result_fail("futex_wait returned: %d %s\n",
res ? errno : res,
res ? strerror(errno) : "");
ret = RET_FAIL;
} else {
ksft_test_result_pass("futex_wait\n");
}
if (clock_gettime(CLOCK_MONOTONIC, &to)) {
error("clock_gettime failed\n", errno);
return errno;
}
to.tv_nsec += timeout_ns;
if (to.tv_nsec >= 1000000000) {
to.tv_sec++;
to.tv_nsec -= 1000000000;
}
info("Calling futex_waitv on f1: %u @ %p with val=%u\n", f1, &f1, f1+1);
res = futex_waitv(&waitv, 1, 0, &to, CLOCK_MONOTONIC);
if (!res || errno != EWOULDBLOCK) {
ksft_test_result_pass("futex_waitv returned: %d %s\n",
res ? errno : res,
res ? strerror(errno) : "");
ret = RET_FAIL;
} else {
ksft_test_result_pass("futex_waitv\n");
}
ksft_print_cnts();
return ret;
}
| linux-master | tools/testing/selftests/futex/functional/futex_wait_wouldblock.c |
// SPDX-License-Identifier: GPL-2.0-or-later
/******************************************************************************
*
* Copyright FUJITSU LIMITED 2010
* Copyright KOSAKI Motohiro <[email protected]>
*
* DESCRIPTION
* Wait on uninitialized heap. It shold be zero and FUTEX_WAIT should
* return immediately. This test is intent to test zero page handling in
* futex.
*
* AUTHOR
* KOSAKI Motohiro <[email protected]>
*
* HISTORY
* 2010-Jan-6: Initial version by KOSAKI Motohiro <[email protected]>
*
*****************************************************************************/
#include <pthread.h>
#include <stdio.h>
#include <stdlib.h>
#include <sys/mman.h>
#include <syscall.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <unistd.h>
#include <errno.h>
#include <linux/futex.h>
#include <libgen.h>
#include "logging.h"
#include "futextest.h"
#define TEST_NAME "futex-wait-uninitialized-heap"
#define WAIT_US 5000000
static int child_blocked = 1;
static int child_ret;
void *buf;
void usage(char *prog)
{
printf("Usage: %s\n", prog);
printf(" -c Use color\n");
printf(" -h Display this help message\n");
printf(" -v L Verbosity level: %d=QUIET %d=CRITICAL %d=INFO\n",
VQUIET, VCRITICAL, VINFO);
}
void *wait_thread(void *arg)
{
int res;
child_ret = RET_PASS;
res = futex_wait(buf, 1, NULL, 0);
child_blocked = 0;
if (res != 0 && errno != EWOULDBLOCK) {
error("futex failure\n", errno);
child_ret = RET_ERROR;
}
pthread_exit(NULL);
}
int main(int argc, char **argv)
{
int c, ret = RET_PASS;
long page_size;
pthread_t thr;
while ((c = getopt(argc, argv, "chv:")) != -1) {
switch (c) {
case 'c':
log_color(1);
break;
case 'h':
usage(basename(argv[0]));
exit(0);
case 'v':
log_verbosity(atoi(optarg));
break;
default:
usage(basename(argv[0]));
exit(1);
}
}
page_size = sysconf(_SC_PAGESIZE);
buf = mmap(NULL, page_size, PROT_READ|PROT_WRITE,
MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
if (buf == (void *)-1) {
error("mmap\n", errno);
exit(1);
}
ksft_print_header();
ksft_set_plan(1);
ksft_print_msg("%s: Test the uninitialized futex value in FUTEX_WAIT\n",
basename(argv[0]));
ret = pthread_create(&thr, NULL, wait_thread, NULL);
if (ret) {
error("pthread_create\n", errno);
ret = RET_ERROR;
goto out;
}
info("waiting %dus for child to return\n", WAIT_US);
usleep(WAIT_US);
ret = child_ret;
if (child_blocked) {
fail("child blocked in kernel\n");
ret = RET_FAIL;
}
out:
print_result(TEST_NAME, ret);
return ret;
}
| linux-master | tools/testing/selftests/futex/functional/futex_wait_uninitialized_heap.c |
// SPDX-License-Identifier: GPL-2.0-or-later
/*
* futex_waitv() test by André Almeida <[email protected]>
*
* Copyright 2021 Collabora Ltd.
*/
#include <errno.h>
#include <error.h>
#include <getopt.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <time.h>
#include <pthread.h>
#include <stdint.h>
#include <sys/shm.h>
#include "futextest.h"
#include "futex2test.h"
#include "logging.h"
#define TEST_NAME "futex-wait"
#define WAKE_WAIT_US 10000
#define NR_FUTEXES 30
static struct futex_waitv waitv[NR_FUTEXES];
u_int32_t futexes[NR_FUTEXES] = {0};
void usage(char *prog)
{
printf("Usage: %s\n", prog);
printf(" -c Use color\n");
printf(" -h Display this help message\n");
printf(" -v L Verbosity level: %d=QUIET %d=CRITICAL %d=INFO\n",
VQUIET, VCRITICAL, VINFO);
}
void *waiterfn(void *arg)
{
struct timespec to;
int res;
/* setting absolute timeout for futex2 */
if (clock_gettime(CLOCK_MONOTONIC, &to))
error("gettime64 failed\n", errno);
to.tv_sec++;
res = futex_waitv(waitv, NR_FUTEXES, 0, &to, CLOCK_MONOTONIC);
if (res < 0) {
ksft_test_result_fail("futex_waitv returned: %d %s\n",
errno, strerror(errno));
} else if (res != NR_FUTEXES - 1) {
ksft_test_result_fail("futex_waitv returned: %d, expecting %d\n",
res, NR_FUTEXES - 1);
}
return NULL;
}
int main(int argc, char *argv[])
{
pthread_t waiter;
int res, ret = RET_PASS;
struct timespec to;
int c, i;
while ((c = getopt(argc, argv, "cht:v:")) != -1) {
switch (c) {
case 'c':
log_color(1);
break;
case 'h':
usage(basename(argv[0]));
exit(0);
case 'v':
log_verbosity(atoi(optarg));
break;
default:
usage(basename(argv[0]));
exit(1);
}
}
ksft_print_header();
ksft_set_plan(7);
ksft_print_msg("%s: Test FUTEX_WAITV\n",
basename(argv[0]));
for (i = 0; i < NR_FUTEXES; i++) {
waitv[i].uaddr = (uintptr_t)&futexes[i];
waitv[i].flags = FUTEX_32 | FUTEX_PRIVATE_FLAG;
waitv[i].val = 0;
waitv[i].__reserved = 0;
}
/* Private waitv */
if (pthread_create(&waiter, NULL, waiterfn, NULL))
error("pthread_create failed\n", errno);
usleep(WAKE_WAIT_US);
res = futex_wake(u64_to_ptr(waitv[NR_FUTEXES - 1].uaddr), 1, FUTEX_PRIVATE_FLAG);
if (res != 1) {
ksft_test_result_fail("futex_wake private returned: %d %s\n",
res ? errno : res,
res ? strerror(errno) : "");
ret = RET_FAIL;
} else {
ksft_test_result_pass("futex_waitv private\n");
}
/* Shared waitv */
for (i = 0; i < NR_FUTEXES; i++) {
int shm_id = shmget(IPC_PRIVATE, 4096, IPC_CREAT | 0666);
if (shm_id < 0) {
perror("shmget");
exit(1);
}
unsigned int *shared_data = shmat(shm_id, NULL, 0);
*shared_data = 0;
waitv[i].uaddr = (uintptr_t)shared_data;
waitv[i].flags = FUTEX_32;
waitv[i].val = 0;
waitv[i].__reserved = 0;
}
if (pthread_create(&waiter, NULL, waiterfn, NULL))
error("pthread_create failed\n", errno);
usleep(WAKE_WAIT_US);
res = futex_wake(u64_to_ptr(waitv[NR_FUTEXES - 1].uaddr), 1, 0);
if (res != 1) {
ksft_test_result_fail("futex_wake shared returned: %d %s\n",
res ? errno : res,
res ? strerror(errno) : "");
ret = RET_FAIL;
} else {
ksft_test_result_pass("futex_waitv shared\n");
}
for (i = 0; i < NR_FUTEXES; i++)
shmdt(u64_to_ptr(waitv[i].uaddr));
/* Testing a waiter without FUTEX_32 flag */
waitv[0].flags = FUTEX_PRIVATE_FLAG;
if (clock_gettime(CLOCK_MONOTONIC, &to))
error("gettime64 failed\n", errno);
to.tv_sec++;
res = futex_waitv(waitv, NR_FUTEXES, 0, &to, CLOCK_MONOTONIC);
if (res == EINVAL) {
ksft_test_result_fail("futex_waitv private returned: %d %s\n",
res ? errno : res,
res ? strerror(errno) : "");
ret = RET_FAIL;
} else {
ksft_test_result_pass("futex_waitv without FUTEX_32\n");
}
/* Testing a waiter with an unaligned address */
waitv[0].flags = FUTEX_PRIVATE_FLAG | FUTEX_32;
waitv[0].uaddr = 1;
if (clock_gettime(CLOCK_MONOTONIC, &to))
error("gettime64 failed\n", errno);
to.tv_sec++;
res = futex_waitv(waitv, NR_FUTEXES, 0, &to, CLOCK_MONOTONIC);
if (res == EINVAL) {
ksft_test_result_fail("futex_wake private returned: %d %s\n",
res ? errno : res,
res ? strerror(errno) : "");
ret = RET_FAIL;
} else {
ksft_test_result_pass("futex_waitv with an unaligned address\n");
}
/* Testing a NULL address for waiters.uaddr */
waitv[0].uaddr = 0x00000000;
if (clock_gettime(CLOCK_MONOTONIC, &to))
error("gettime64 failed\n", errno);
to.tv_sec++;
res = futex_waitv(waitv, NR_FUTEXES, 0, &to, CLOCK_MONOTONIC);
if (res == EINVAL) {
ksft_test_result_fail("futex_waitv private returned: %d %s\n",
res ? errno : res,
res ? strerror(errno) : "");
ret = RET_FAIL;
} else {
ksft_test_result_pass("futex_waitv NULL address in waitv.uaddr\n");
}
/* Testing a NULL address for *waiters */
if (clock_gettime(CLOCK_MONOTONIC, &to))
error("gettime64 failed\n", errno);
to.tv_sec++;
res = futex_waitv(NULL, NR_FUTEXES, 0, &to, CLOCK_MONOTONIC);
if (res == EINVAL) {
ksft_test_result_fail("futex_waitv private returned: %d %s\n",
res ? errno : res,
res ? strerror(errno) : "");
ret = RET_FAIL;
} else {
ksft_test_result_pass("futex_waitv NULL address in *waiters\n");
}
/* Testing an invalid clockid */
if (clock_gettime(CLOCK_MONOTONIC, &to))
error("gettime64 failed\n", errno);
to.tv_sec++;
res = futex_waitv(NULL, NR_FUTEXES, 0, &to, CLOCK_TAI);
if (res == EINVAL) {
ksft_test_result_fail("futex_waitv private returned: %d %s\n",
res ? errno : res,
res ? strerror(errno) : "");
ret = RET_FAIL;
} else {
ksft_test_result_pass("futex_waitv invalid clockid\n");
}
ksft_print_cnts();
return ret;
}
| linux-master | tools/testing/selftests/futex/functional/futex_waitv.c |
// SPDX-License-Identifier: GPL-2.0-or-later
/******************************************************************************
*
* Copyright © International Business Machines Corp., 2006-2008
*
* DESCRIPTION
* This test excercises the futex syscall op codes needed for requeuing
* priority inheritance aware POSIX condition variables and mutexes.
*
* AUTHORS
* Sripathi Kodi <[email protected]>
* Darren Hart <[email protected]>
*
* HISTORY
* 2008-Jan-13: Initial version by Sripathi Kodi <[email protected]>
* 2009-Nov-6: futex test adaptation by Darren Hart <[email protected]>
*
*****************************************************************************/
#include <errno.h>
#include <limits.h>
#include <pthread.h>
#include <stdio.h>
#include <stdlib.h>
#include <signal.h>
#include <string.h>
#include "atomic.h"
#include "futextest.h"
#include "logging.h"
#define TEST_NAME "futex-requeue-pi"
#define MAX_WAKE_ITERS 1000
#define THREAD_MAX 10
#define SIGNAL_PERIOD_US 100
atomic_t waiters_blocked = ATOMIC_INITIALIZER;
atomic_t waiters_woken = ATOMIC_INITIALIZER;
futex_t f1 = FUTEX_INITIALIZER;
futex_t f2 = FUTEX_INITIALIZER;
futex_t wake_complete = FUTEX_INITIALIZER;
/* Test option defaults */
static long timeout_ns;
static int broadcast;
static int owner;
static int locked;
struct thread_arg {
long id;
struct timespec *timeout;
int lock;
int ret;
};
#define THREAD_ARG_INITIALIZER { 0, NULL, 0, 0 }
void usage(char *prog)
{
printf("Usage: %s\n", prog);
printf(" -b Broadcast wakeup (all waiters)\n");
printf(" -c Use color\n");
printf(" -h Display this help message\n");
printf(" -l Lock the pi futex across requeue\n");
printf(" -o Use a third party pi futex owner during requeue (cancels -l)\n");
printf(" -t N Timeout in nanoseconds (default: 0)\n");
printf(" -v L Verbosity level: %d=QUIET %d=CRITICAL %d=INFO\n",
VQUIET, VCRITICAL, VINFO);
}
int create_rt_thread(pthread_t *pth, void*(*func)(void *), void *arg,
int policy, int prio)
{
int ret;
struct sched_param schedp;
pthread_attr_t attr;
pthread_attr_init(&attr);
memset(&schedp, 0, sizeof(schedp));
ret = pthread_attr_setinheritsched(&attr, PTHREAD_EXPLICIT_SCHED);
if (ret) {
error("pthread_attr_setinheritsched\n", ret);
return -1;
}
ret = pthread_attr_setschedpolicy(&attr, policy);
if (ret) {
error("pthread_attr_setschedpolicy\n", ret);
return -1;
}
schedp.sched_priority = prio;
ret = pthread_attr_setschedparam(&attr, &schedp);
if (ret) {
error("pthread_attr_setschedparam\n", ret);
return -1;
}
ret = pthread_create(pth, &attr, func, arg);
if (ret) {
error("pthread_create\n", ret);
return -1;
}
return 0;
}
void *waiterfn(void *arg)
{
struct thread_arg *args = (struct thread_arg *)arg;
futex_t old_val;
info("Waiter %ld: running\n", args->id);
/* Each thread sleeps for a different amount of time
* This is to avoid races, because we don't lock the
* external mutex here */
usleep(1000 * (long)args->id);
old_val = f1;
atomic_inc(&waiters_blocked);
info("Calling futex_wait_requeue_pi: %p (%u) -> %p\n",
&f1, f1, &f2);
args->ret = futex_wait_requeue_pi(&f1, old_val, &f2, args->timeout,
FUTEX_PRIVATE_FLAG);
info("waiter %ld woke with %d %s\n", args->id, args->ret,
args->ret < 0 ? strerror(errno) : "");
atomic_inc(&waiters_woken);
if (args->ret < 0) {
if (args->timeout && errno == ETIMEDOUT)
args->ret = 0;
else {
args->ret = RET_ERROR;
error("futex_wait_requeue_pi\n", errno);
}
futex_lock_pi(&f2, NULL, 0, FUTEX_PRIVATE_FLAG);
}
futex_unlock_pi(&f2, FUTEX_PRIVATE_FLAG);
info("Waiter %ld: exiting with %d\n", args->id, args->ret);
pthread_exit((void *)&args->ret);
}
void *broadcast_wakerfn(void *arg)
{
struct thread_arg *args = (struct thread_arg *)arg;
int nr_requeue = INT_MAX;
int task_count = 0;
futex_t old_val;
int nr_wake = 1;
int i = 0;
info("Waker: waiting for waiters to block\n");
while (waiters_blocked.val < THREAD_MAX)
usleep(1000);
usleep(1000);
info("Waker: Calling broadcast\n");
if (args->lock) {
info("Calling FUTEX_LOCK_PI on mutex=%x @ %p\n", f2, &f2);
futex_lock_pi(&f2, NULL, 0, FUTEX_PRIVATE_FLAG);
}
continue_requeue:
old_val = f1;
args->ret = futex_cmp_requeue_pi(&f1, old_val, &f2, nr_wake, nr_requeue,
FUTEX_PRIVATE_FLAG);
if (args->ret < 0) {
args->ret = RET_ERROR;
error("FUTEX_CMP_REQUEUE_PI failed\n", errno);
} else if (++i < MAX_WAKE_ITERS) {
task_count += args->ret;
if (task_count < THREAD_MAX - waiters_woken.val)
goto continue_requeue;
} else {
error("max broadcast iterations (%d) reached with %d/%d tasks woken or requeued\n",
0, MAX_WAKE_ITERS, task_count, THREAD_MAX);
args->ret = RET_ERROR;
}
futex_wake(&wake_complete, 1, FUTEX_PRIVATE_FLAG);
if (args->lock)
futex_unlock_pi(&f2, FUTEX_PRIVATE_FLAG);
if (args->ret > 0)
args->ret = task_count;
info("Waker: exiting with %d\n", args->ret);
pthread_exit((void *)&args->ret);
}
void *signal_wakerfn(void *arg)
{
struct thread_arg *args = (struct thread_arg *)arg;
unsigned int old_val;
int nr_requeue = 0;
int task_count = 0;
int nr_wake = 1;
int i = 0;
info("Waker: waiting for waiters to block\n");
while (waiters_blocked.val < THREAD_MAX)
usleep(1000);
usleep(1000);
while (task_count < THREAD_MAX && waiters_woken.val < THREAD_MAX) {
info("task_count: %d, waiters_woken: %d\n",
task_count, waiters_woken.val);
if (args->lock) {
info("Calling FUTEX_LOCK_PI on mutex=%x @ %p\n",
f2, &f2);
futex_lock_pi(&f2, NULL, 0, FUTEX_PRIVATE_FLAG);
}
info("Waker: Calling signal\n");
/* cond_signal */
old_val = f1;
args->ret = futex_cmp_requeue_pi(&f1, old_val, &f2,
nr_wake, nr_requeue,
FUTEX_PRIVATE_FLAG);
if (args->ret < 0)
args->ret = -errno;
info("futex: %x\n", f2);
if (args->lock) {
info("Calling FUTEX_UNLOCK_PI on mutex=%x @ %p\n",
f2, &f2);
futex_unlock_pi(&f2, FUTEX_PRIVATE_FLAG);
}
info("futex: %x\n", f2);
if (args->ret < 0) {
error("FUTEX_CMP_REQUEUE_PI failed\n", errno);
args->ret = RET_ERROR;
break;
}
task_count += args->ret;
usleep(SIGNAL_PERIOD_US);
i++;
/* we have to loop at least THREAD_MAX times */
if (i > MAX_WAKE_ITERS + THREAD_MAX) {
error("max signaling iterations (%d) reached, giving up on pending waiters.\n",
0, MAX_WAKE_ITERS + THREAD_MAX);
args->ret = RET_ERROR;
break;
}
}
futex_wake(&wake_complete, 1, FUTEX_PRIVATE_FLAG);
if (args->ret >= 0)
args->ret = task_count;
info("Waker: exiting with %d\n", args->ret);
info("Waker: waiters_woken: %d\n", waiters_woken.val);
pthread_exit((void *)&args->ret);
}
void *third_party_blocker(void *arg)
{
struct thread_arg *args = (struct thread_arg *)arg;
int ret2 = 0;
args->ret = futex_lock_pi(&f2, NULL, 0, FUTEX_PRIVATE_FLAG);
if (args->ret)
goto out;
args->ret = futex_wait(&wake_complete, wake_complete, NULL,
FUTEX_PRIVATE_FLAG);
ret2 = futex_unlock_pi(&f2, FUTEX_PRIVATE_FLAG);
out:
if (args->ret || ret2) {
error("third_party_blocker() futex error", 0);
args->ret = RET_ERROR;
}
pthread_exit((void *)&args->ret);
}
int unit_test(int broadcast, long lock, int third_party_owner, long timeout_ns)
{
void *(*wakerfn)(void *) = signal_wakerfn;
struct thread_arg blocker_arg = THREAD_ARG_INITIALIZER;
struct thread_arg waker_arg = THREAD_ARG_INITIALIZER;
pthread_t waiter[THREAD_MAX], waker, blocker;
struct timespec ts, *tsp = NULL;
struct thread_arg args[THREAD_MAX];
int *waiter_ret;
int i, ret = RET_PASS;
if (timeout_ns) {
time_t secs;
info("timeout_ns = %ld\n", timeout_ns);
ret = clock_gettime(CLOCK_MONOTONIC, &ts);
secs = (ts.tv_nsec + timeout_ns) / 1000000000;
ts.tv_nsec = ((int64_t)ts.tv_nsec + timeout_ns) % 1000000000;
ts.tv_sec += secs;
info("ts.tv_sec = %ld\n", ts.tv_sec);
info("ts.tv_nsec = %ld\n", ts.tv_nsec);
tsp = &ts;
}
if (broadcast)
wakerfn = broadcast_wakerfn;
if (third_party_owner) {
if (create_rt_thread(&blocker, third_party_blocker,
(void *)&blocker_arg, SCHED_FIFO, 1)) {
error("Creating third party blocker thread failed\n",
errno);
ret = RET_ERROR;
goto out;
}
}
atomic_set(&waiters_woken, 0);
for (i = 0; i < THREAD_MAX; i++) {
args[i].id = i;
args[i].timeout = tsp;
info("Starting thread %d\n", i);
if (create_rt_thread(&waiter[i], waiterfn, (void *)&args[i],
SCHED_FIFO, 1)) {
error("Creating waiting thread failed\n", errno);
ret = RET_ERROR;
goto out;
}
}
waker_arg.lock = lock;
if (create_rt_thread(&waker, wakerfn, (void *)&waker_arg,
SCHED_FIFO, 1)) {
error("Creating waker thread failed\n", errno);
ret = RET_ERROR;
goto out;
}
/* Wait for threads to finish */
/* Store the first error or failure encountered in waiter_ret */
waiter_ret = &args[0].ret;
for (i = 0; i < THREAD_MAX; i++)
pthread_join(waiter[i],
*waiter_ret ? NULL : (void **)&waiter_ret);
if (third_party_owner)
pthread_join(blocker, NULL);
pthread_join(waker, NULL);
out:
if (!ret) {
if (*waiter_ret)
ret = *waiter_ret;
else if (waker_arg.ret < 0)
ret = waker_arg.ret;
else if (blocker_arg.ret)
ret = blocker_arg.ret;
}
return ret;
}
int main(int argc, char *argv[])
{
int c, ret;
while ((c = getopt(argc, argv, "bchlot:v:")) != -1) {
switch (c) {
case 'b':
broadcast = 1;
break;
case 'c':
log_color(1);
break;
case 'h':
usage(basename(argv[0]));
exit(0);
case 'l':
locked = 1;
break;
case 'o':
owner = 1;
locked = 0;
break;
case 't':
timeout_ns = atoi(optarg);
break;
case 'v':
log_verbosity(atoi(optarg));
break;
default:
usage(basename(argv[0]));
exit(1);
}
}
ksft_print_header();
ksft_set_plan(1);
ksft_print_msg("%s: Test requeue functionality\n", basename(argv[0]));
ksft_print_msg(
"\tArguments: broadcast=%d locked=%d owner=%d timeout=%ldns\n",
broadcast, locked, owner, timeout_ns);
/*
* FIXME: unit_test is obsolete now that we parse options and the
* various style of runs are done by run.sh - simplify the code and move
* unit_test into main()
*/
ret = unit_test(broadcast, locked, owner, timeout_ns);
print_result(TEST_NAME, ret);
return ret;
}
| linux-master | tools/testing/selftests/futex/functional/futex_requeue_pi.c |
// SPDX-License-Identifier: GPL-2.0-or-later
/******************************************************************************
*
* Copyright © International Business Machines Corp., 2009
*
* DESCRIPTION
* 1. Block a thread using FUTEX_WAIT
* 2. Attempt to use FUTEX_CMP_REQUEUE_PI on the futex from 1.
* 3. The kernel must detect the mismatch and return -EINVAL.
*
* AUTHOR
* Darren Hart <[email protected]>
*
* HISTORY
* 2009-Nov-9: Initial version by Darren Hart <[email protected]>
*
*****************************************************************************/
#include <errno.h>
#include <getopt.h>
#include <pthread.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <time.h>
#include "futextest.h"
#include "logging.h"
#define TEST_NAME "futex-requeue-pi-mismatched-ops"
futex_t f1 = FUTEX_INITIALIZER;
futex_t f2 = FUTEX_INITIALIZER;
int child_ret = 0;
void usage(char *prog)
{
printf("Usage: %s\n", prog);
printf(" -c Use color\n");
printf(" -h Display this help message\n");
printf(" -v L Verbosity level: %d=QUIET %d=CRITICAL %d=INFO\n",
VQUIET, VCRITICAL, VINFO);
}
void *blocking_child(void *arg)
{
child_ret = futex_wait(&f1, f1, NULL, FUTEX_PRIVATE_FLAG);
if (child_ret < 0) {
child_ret = -errno;
error("futex_wait\n", errno);
}
return (void *)&child_ret;
}
int main(int argc, char *argv[])
{
int ret = RET_PASS;
pthread_t child;
int c;
while ((c = getopt(argc, argv, "chv:")) != -1) {
switch (c) {
case 'c':
log_color(1);
break;
case 'h':
usage(basename(argv[0]));
exit(0);
case 'v':
log_verbosity(atoi(optarg));
break;
default:
usage(basename(argv[0]));
exit(1);
}
}
ksft_print_header();
ksft_set_plan(1);
ksft_print_msg("%s: Detect mismatched requeue_pi operations\n",
basename(argv[0]));
if (pthread_create(&child, NULL, blocking_child, NULL)) {
error("pthread_create\n", errno);
ret = RET_ERROR;
goto out;
}
/* Allow the child to block in the kernel. */
sleep(1);
/*
* The kernel should detect the waiter did not setup the
* q->requeue_pi_key and return -EINVAL. If it does not,
* it likely gave the lock to the child, which is now hung
* in the kernel.
*/
ret = futex_cmp_requeue_pi(&f1, f1, &f2, 1, 0, FUTEX_PRIVATE_FLAG);
if (ret < 0) {
if (errno == EINVAL) {
/*
* The kernel correctly detected the mismatched
* requeue_pi target and aborted. Wake the child with
* FUTEX_WAKE.
*/
ret = futex_wake(&f1, 1, FUTEX_PRIVATE_FLAG);
if (ret == 1) {
ret = RET_PASS;
} else if (ret < 0) {
error("futex_wake\n", errno);
ret = RET_ERROR;
} else {
error("futex_wake did not wake the child\n", 0);
ret = RET_ERROR;
}
} else {
error("futex_cmp_requeue_pi\n", errno);
ret = RET_ERROR;
}
} else if (ret > 0) {
fail("futex_cmp_requeue_pi failed to detect the mismatch\n");
ret = RET_FAIL;
} else {
error("futex_cmp_requeue_pi found no waiters\n", 0);
ret = RET_ERROR;
}
pthread_join(child, NULL);
if (!ret)
ret = child_ret;
out:
/* If the kernel crashes, we shouldn't return at all. */
print_result(TEST_NAME, ret);
return ret;
}
| linux-master | tools/testing/selftests/futex/functional/futex_requeue_pi_mismatched_ops.c |
// SPDX-License-Identifier: GPL-2.0-or-later
/*
* Copyright Collabora Ltd., 2021
*
* futex cmp requeue test by André Almeida <[email protected]>
*/
#include <pthread.h>
#include <limits.h>
#include "logging.h"
#include "futextest.h"
#define TEST_NAME "futex-requeue"
#define timeout_ns 30000000
#define WAKE_WAIT_US 10000
volatile futex_t *f1;
void usage(char *prog)
{
printf("Usage: %s\n", prog);
printf(" -c Use color\n");
printf(" -h Display this help message\n");
printf(" -v L Verbosity level: %d=QUIET %d=CRITICAL %d=INFO\n",
VQUIET, VCRITICAL, VINFO);
}
void *waiterfn(void *arg)
{
struct timespec to;
to.tv_sec = 0;
to.tv_nsec = timeout_ns;
if (futex_wait(f1, *f1, &to, 0))
printf("waiter failed errno %d\n", errno);
return NULL;
}
int main(int argc, char *argv[])
{
pthread_t waiter[10];
int res, ret = RET_PASS;
int c, i;
volatile futex_t _f1 = 0;
volatile futex_t f2 = 0;
f1 = &_f1;
while ((c = getopt(argc, argv, "cht:v:")) != -1) {
switch (c) {
case 'c':
log_color(1);
break;
case 'h':
usage(basename(argv[0]));
exit(0);
case 'v':
log_verbosity(atoi(optarg));
break;
default:
usage(basename(argv[0]));
exit(1);
}
}
ksft_print_header();
ksft_set_plan(2);
ksft_print_msg("%s: Test futex_requeue\n",
basename(argv[0]));
/*
* Requeue a waiter from f1 to f2, and wake f2.
*/
if (pthread_create(&waiter[0], NULL, waiterfn, NULL))
error("pthread_create failed\n", errno);
usleep(WAKE_WAIT_US);
info("Requeuing 1 futex from f1 to f2\n");
res = futex_cmp_requeue(f1, 0, &f2, 0, 1, 0);
if (res != 1) {
ksft_test_result_fail("futex_requeue simple returned: %d %s\n",
res ? errno : res,
res ? strerror(errno) : "");
ret = RET_FAIL;
}
info("Waking 1 futex at f2\n");
res = futex_wake(&f2, 1, 0);
if (res != 1) {
ksft_test_result_fail("futex_requeue simple returned: %d %s\n",
res ? errno : res,
res ? strerror(errno) : "");
ret = RET_FAIL;
} else {
ksft_test_result_pass("futex_requeue simple succeeds\n");
}
/*
* Create 10 waiters at f1. At futex_requeue, wake 3 and requeue 7.
* At futex_wake, wake INT_MAX (should be exactly 7).
*/
for (i = 0; i < 10; i++) {
if (pthread_create(&waiter[i], NULL, waiterfn, NULL))
error("pthread_create failed\n", errno);
}
usleep(WAKE_WAIT_US);
info("Waking 3 futexes at f1 and requeuing 7 futexes from f1 to f2\n");
res = futex_cmp_requeue(f1, 0, &f2, 3, 7, 0);
if (res != 10) {
ksft_test_result_fail("futex_requeue many returned: %d %s\n",
res ? errno : res,
res ? strerror(errno) : "");
ret = RET_FAIL;
}
info("Waking INT_MAX futexes at f2\n");
res = futex_wake(&f2, INT_MAX, 0);
if (res != 7) {
ksft_test_result_fail("futex_requeue many returned: %d %s\n",
res ? errno : res,
res ? strerror(errno) : "");
ret = RET_FAIL;
} else {
ksft_test_result_pass("futex_requeue many succeeds\n");
}
ksft_print_cnts();
return ret;
}
| linux-master | tools/testing/selftests/futex/functional/futex_requeue.c |
// SPDX-License-Identifier: GPL-2.0-or-later
/*
* Author: Alexey Gladkov <[email protected]>
*/
#define _GNU_SOURCE
#include <sys/types.h>
#include <sys/wait.h>
#include <sys/time.h>
#include <sys/resource.h>
#include <sys/prctl.h>
#include <sys/stat.h>
#include <unistd.h>
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <sched.h>
#include <signal.h>
#include <limits.h>
#include <fcntl.h>
#include <errno.h>
#include <err.h>
#define NR_CHILDS 2
static char *service_prog;
static uid_t user = 60000;
static uid_t group = 60000;
static void setrlimit_nproc(rlim_t n)
{
pid_t pid = getpid();
struct rlimit limit = {
.rlim_cur = n,
.rlim_max = n
};
warnx("(pid=%d): Setting RLIMIT_NPROC=%ld", pid, n);
if (setrlimit(RLIMIT_NPROC, &limit) < 0)
err(EXIT_FAILURE, "(pid=%d): setrlimit(RLIMIT_NPROC)", pid);
}
static pid_t fork_child(void)
{
pid_t pid = fork();
if (pid < 0)
err(EXIT_FAILURE, "fork");
if (pid > 0)
return pid;
pid = getpid();
warnx("(pid=%d): New process starting ...", pid);
if (prctl(PR_SET_PDEATHSIG, SIGKILL) < 0)
err(EXIT_FAILURE, "(pid=%d): prctl(PR_SET_PDEATHSIG)", pid);
signal(SIGUSR1, SIG_DFL);
warnx("(pid=%d): Changing to uid=%d, gid=%d", pid, user, group);
if (setgid(group) < 0)
err(EXIT_FAILURE, "(pid=%d): setgid(%d)", pid, group);
if (setuid(user) < 0)
err(EXIT_FAILURE, "(pid=%d): setuid(%d)", pid, user);
warnx("(pid=%d): Service running ...", pid);
warnx("(pid=%d): Unshare user namespace", pid);
if (unshare(CLONE_NEWUSER) < 0)
err(EXIT_FAILURE, "unshare(CLONE_NEWUSER)");
char *const argv[] = { "service", NULL };
char *const envp[] = { "I_AM_SERVICE=1", NULL };
warnx("(pid=%d): Executing real service ...", pid);
execve(service_prog, argv, envp);
err(EXIT_FAILURE, "(pid=%d): execve", pid);
}
int main(int argc, char **argv)
{
size_t i;
pid_t child[NR_CHILDS];
int wstatus[NR_CHILDS];
int childs = NR_CHILDS;
pid_t pid;
if (getenv("I_AM_SERVICE")) {
pause();
exit(EXIT_SUCCESS);
}
service_prog = argv[0];
pid = getpid();
warnx("(pid=%d) Starting testcase", pid);
/*
* This rlimit is not a problem for root because it can be exceeded.
*/
setrlimit_nproc(1);
for (i = 0; i < NR_CHILDS; i++) {
child[i] = fork_child();
wstatus[i] = 0;
usleep(250000);
}
while (1) {
for (i = 0; i < NR_CHILDS; i++) {
if (child[i] <= 0)
continue;
errno = 0;
pid_t ret = waitpid(child[i], &wstatus[i], WNOHANG);
if (!ret || (!WIFEXITED(wstatus[i]) && !WIFSIGNALED(wstatus[i])))
continue;
if (ret < 0 && errno != ECHILD)
warn("(pid=%d): waitpid(%d)", pid, child[i]);
child[i] *= -1;
childs -= 1;
}
if (!childs)
break;
usleep(250000);
for (i = 0; i < NR_CHILDS; i++) {
if (child[i] <= 0)
continue;
kill(child[i], SIGUSR1);
}
}
for (i = 0; i < NR_CHILDS; i++) {
if (WIFEXITED(wstatus[i]))
warnx("(pid=%d): pid %d exited, status=%d",
pid, -child[i], WEXITSTATUS(wstatus[i]));
else if (WIFSIGNALED(wstatus[i]))
warnx("(pid=%d): pid %d killed by signal %d",
pid, -child[i], WTERMSIG(wstatus[i]));
if (WIFSIGNALED(wstatus[i]) && WTERMSIG(wstatus[i]) == SIGUSR1)
continue;
warnx("(pid=%d): Test failed", pid);
exit(EXIT_FAILURE);
}
warnx("(pid=%d): Test passed", pid);
exit(EXIT_SUCCESS);
}
| linux-master | tools/testing/selftests/rlimits/rlimits-per-userns.c |
// SPDX-License-Identifier: GPL-2.0
/* Test triggering of loading of firmware from different mount
* namespaces. Expect firmware to be always loaded from the mount
* namespace of PID 1. */
#define _GNU_SOURCE
#include <errno.h>
#include <fcntl.h>
#include <sched.h>
#include <stdarg.h>
#include <stdbool.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/mount.h>
#include <sys/stat.h>
#include <sys/types.h>
#include <sys/wait.h>
#include <unistd.h>
#ifndef CLONE_NEWNS
# define CLONE_NEWNS 0x00020000
#endif
static char *fw_path = NULL;
static void die(char *fmt, ...)
{
va_list ap;
va_start(ap, fmt);
vfprintf(stderr, fmt, ap);
va_end(ap);
if (fw_path)
unlink(fw_path);
umount("/lib/firmware");
exit(EXIT_FAILURE);
}
static void trigger_fw(const char *fw_name, const char *sys_path)
{
int fd;
fd = open(sys_path, O_WRONLY);
if (fd < 0)
die("open failed: %s\n",
strerror(errno));
if (write(fd, fw_name, strlen(fw_name)) != strlen(fw_name))
exit(EXIT_FAILURE);
close(fd);
}
static void setup_fw(const char *fw_path)
{
int fd;
const char fw[] = "ABCD0123";
fd = open(fw_path, O_WRONLY | O_CREAT, 0600);
if (fd < 0)
die("open failed: %s\n",
strerror(errno));
if (write(fd, fw, sizeof(fw) -1) != sizeof(fw) -1)
die("write failed: %s\n",
strerror(errno));
close(fd);
}
static bool test_fw_in_ns(const char *fw_name, const char *sys_path, bool block_fw_in_parent_ns)
{
pid_t child;
if (block_fw_in_parent_ns)
if (mount("test", "/lib/firmware", "tmpfs", MS_RDONLY, NULL) == -1)
die("blocking firmware in parent ns failed\n");
child = fork();
if (child == -1) {
die("fork failed: %s\n",
strerror(errno));
}
if (child != 0) { /* parent */
pid_t pid;
int status;
pid = waitpid(child, &status, 0);
if (pid == -1) {
die("waitpid failed: %s\n",
strerror(errno));
}
if (pid != child) {
die("waited for %d got %d\n",
child, pid);
}
if (!WIFEXITED(status)) {
die("child did not terminate cleanly\n");
}
if (block_fw_in_parent_ns)
umount("/lib/firmware");
return WEXITSTATUS(status) == EXIT_SUCCESS;
}
if (unshare(CLONE_NEWNS) != 0) {
die("unshare(CLONE_NEWNS) failed: %s\n",
strerror(errno));
}
if (mount(NULL, "/", NULL, MS_SLAVE|MS_REC, NULL) == -1)
die("remount root in child ns failed\n");
if (!block_fw_in_parent_ns) {
if (mount("test", "/lib/firmware", "tmpfs", MS_RDONLY, NULL) == -1)
die("blocking firmware in child ns failed\n");
} else
umount("/lib/firmware");
trigger_fw(fw_name, sys_path);
exit(EXIT_SUCCESS);
}
int main(int argc, char **argv)
{
const char *fw_name = "test-firmware.bin";
char *sys_path;
if (argc != 2)
die("usage: %s sys_path\n", argv[0]);
/* Mount tmpfs to /lib/firmware so we don't have to assume
that it is writable for us.*/
if (mount("test", "/lib/firmware", "tmpfs", 0, NULL) == -1)
die("mounting tmpfs to /lib/firmware failed\n");
sys_path = argv[1];
if (asprintf(&fw_path, "/lib/firmware/%s", fw_name) < 0)
die("error: failed to build full fw_path\n");
setup_fw(fw_path);
setvbuf(stdout, NULL, _IONBF, 0);
/* Positive case: firmware in PID1 mount namespace */
printf("Testing with firmware in parent namespace (assumed to be same file system as PID1)\n");
if (!test_fw_in_ns(fw_name, sys_path, false))
die("error: failed to access firmware\n");
/* Negative case: firmware in child mount namespace, expected to fail */
printf("Testing with firmware in child namespace\n");
if (test_fw_in_ns(fw_name, sys_path, true))
die("error: firmware access did not fail\n");
unlink(fw_path);
free(fw_path);
umount("/lib/firmware");
exit(EXIT_SUCCESS);
}
| linux-master | tools/testing/selftests/firmware/fw_namespace.c |
// SPDX-License-Identifier: LGPL-2.1
/*
* rseq.c
*
* Copyright (C) 2016 Mathieu Desnoyers <[email protected]>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; only
* version 2.1 of the License.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*/
#define _GNU_SOURCE
#include <errno.h>
#include <sched.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <syscall.h>
#include <assert.h>
#include <signal.h>
#include <limits.h>
#include <dlfcn.h>
#include <stddef.h>
#include <sys/auxv.h>
#include <linux/auxvec.h>
#include <linux/compiler.h>
#include "../kselftest.h"
#include "rseq.h"
/*
* Define weak versions to play nice with binaries that are statically linked
* against a libc that doesn't support registering its own rseq.
*/
__weak ptrdiff_t __rseq_offset;
__weak unsigned int __rseq_size;
__weak unsigned int __rseq_flags;
static const ptrdiff_t *libc_rseq_offset_p = &__rseq_offset;
static const unsigned int *libc_rseq_size_p = &__rseq_size;
static const unsigned int *libc_rseq_flags_p = &__rseq_flags;
/* Offset from the thread pointer to the rseq area. */
ptrdiff_t rseq_offset;
/*
* Size of the registered rseq area. 0 if the registration was
* unsuccessful.
*/
unsigned int rseq_size = -1U;
/* Flags used during rseq registration. */
unsigned int rseq_flags;
/*
* rseq feature size supported by the kernel. 0 if the registration was
* unsuccessful.
*/
unsigned int rseq_feature_size = -1U;
static int rseq_ownership;
static int rseq_reg_success; /* At least one rseq registration has succeded. */
/* Allocate a large area for the TLS. */
#define RSEQ_THREAD_AREA_ALLOC_SIZE 1024
/* Original struct rseq feature size is 20 bytes. */
#define ORIG_RSEQ_FEATURE_SIZE 20
/* Original struct rseq allocation size is 32 bytes. */
#define ORIG_RSEQ_ALLOC_SIZE 32
static
__thread struct rseq_abi __rseq_abi __attribute__((tls_model("initial-exec"), aligned(RSEQ_THREAD_AREA_ALLOC_SIZE))) = {
.cpu_id = RSEQ_ABI_CPU_ID_UNINITIALIZED,
};
static int sys_rseq(struct rseq_abi *rseq_abi, uint32_t rseq_len,
int flags, uint32_t sig)
{
return syscall(__NR_rseq, rseq_abi, rseq_len, flags, sig);
}
static int sys_getcpu(unsigned *cpu, unsigned *node)
{
return syscall(__NR_getcpu, cpu, node, NULL);
}
int rseq_available(void)
{
int rc;
rc = sys_rseq(NULL, 0, 0, 0);
if (rc != -1)
abort();
switch (errno) {
case ENOSYS:
return 0;
case EINVAL:
return 1;
default:
abort();
}
}
int rseq_register_current_thread(void)
{
int rc;
if (!rseq_ownership) {
/* Treat libc's ownership as a successful registration. */
return 0;
}
rc = sys_rseq(&__rseq_abi, rseq_size, 0, RSEQ_SIG);
if (rc) {
if (RSEQ_READ_ONCE(rseq_reg_success)) {
/* Incoherent success/failure within process. */
abort();
}
return -1;
}
assert(rseq_current_cpu_raw() >= 0);
RSEQ_WRITE_ONCE(rseq_reg_success, 1);
return 0;
}
int rseq_unregister_current_thread(void)
{
int rc;
if (!rseq_ownership) {
/* Treat libc's ownership as a successful unregistration. */
return 0;
}
rc = sys_rseq(&__rseq_abi, rseq_size, RSEQ_ABI_FLAG_UNREGISTER, RSEQ_SIG);
if (rc)
return -1;
return 0;
}
static
unsigned int get_rseq_feature_size(void)
{
unsigned long auxv_rseq_feature_size, auxv_rseq_align;
auxv_rseq_align = getauxval(AT_RSEQ_ALIGN);
assert(!auxv_rseq_align || auxv_rseq_align <= RSEQ_THREAD_AREA_ALLOC_SIZE);
auxv_rseq_feature_size = getauxval(AT_RSEQ_FEATURE_SIZE);
assert(!auxv_rseq_feature_size || auxv_rseq_feature_size <= RSEQ_THREAD_AREA_ALLOC_SIZE);
if (auxv_rseq_feature_size)
return auxv_rseq_feature_size;
else
return ORIG_RSEQ_FEATURE_SIZE;
}
static __attribute__((constructor))
void rseq_init(void)
{
/*
* If the libc's registered rseq size isn't already valid, it may be
* because the binary is dynamically linked and not necessarily due to
* libc not having registered a restartable sequence. Try to find the
* symbols if that's the case.
*/
if (!*libc_rseq_size_p) {
libc_rseq_offset_p = dlsym(RTLD_NEXT, "__rseq_offset");
libc_rseq_size_p = dlsym(RTLD_NEXT, "__rseq_size");
libc_rseq_flags_p = dlsym(RTLD_NEXT, "__rseq_flags");
}
if (libc_rseq_size_p && libc_rseq_offset_p && libc_rseq_flags_p &&
*libc_rseq_size_p != 0) {
/* rseq registration owned by glibc */
rseq_offset = *libc_rseq_offset_p;
rseq_size = *libc_rseq_size_p;
rseq_flags = *libc_rseq_flags_p;
rseq_feature_size = get_rseq_feature_size();
if (rseq_feature_size > rseq_size)
rseq_feature_size = rseq_size;
return;
}
rseq_ownership = 1;
if (!rseq_available()) {
rseq_size = 0;
rseq_feature_size = 0;
return;
}
rseq_offset = (void *)&__rseq_abi - rseq_thread_pointer();
rseq_flags = 0;
rseq_feature_size = get_rseq_feature_size();
if (rseq_feature_size == ORIG_RSEQ_FEATURE_SIZE)
rseq_size = ORIG_RSEQ_ALLOC_SIZE;
else
rseq_size = RSEQ_THREAD_AREA_ALLOC_SIZE;
}
static __attribute__((destructor))
void rseq_exit(void)
{
if (!rseq_ownership)
return;
rseq_offset = 0;
rseq_size = -1U;
rseq_feature_size = -1U;
rseq_ownership = 0;
}
int32_t rseq_fallback_current_cpu(void)
{
int32_t cpu;
cpu = sched_getcpu();
if (cpu < 0) {
perror("sched_getcpu()");
abort();
}
return cpu;
}
int32_t rseq_fallback_current_node(void)
{
uint32_t cpu_id, node_id;
int ret;
ret = sys_getcpu(&cpu_id, &node_id);
if (ret) {
perror("sys_getcpu()");
return ret;
}
return (int32_t) node_id;
}
| linux-master | tools/testing/selftests/rseq/rseq.c |
// SPDX-License-Identifier: LGPL-2.1
#define _GNU_SOURCE
#include <assert.h>
#include <linux/membarrier.h>
#include <pthread.h>
#include <sched.h>
#include <stdatomic.h>
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <syscall.h>
#include <unistd.h>
#include <poll.h>
#include <sys/types.h>
#include <signal.h>
#include <errno.h>
#include <stddef.h>
#include <stdbool.h>
static inline pid_t rseq_gettid(void)
{
return syscall(__NR_gettid);
}
#define NR_INJECT 9
static int loop_cnt[NR_INJECT + 1];
static int loop_cnt_1 asm("asm_loop_cnt_1") __attribute__((used));
static int loop_cnt_2 asm("asm_loop_cnt_2") __attribute__((used));
static int loop_cnt_3 asm("asm_loop_cnt_3") __attribute__((used));
static int loop_cnt_4 asm("asm_loop_cnt_4") __attribute__((used));
static int loop_cnt_5 asm("asm_loop_cnt_5") __attribute__((used));
static int loop_cnt_6 asm("asm_loop_cnt_6") __attribute__((used));
static int opt_modulo, verbose;
static int opt_yield, opt_signal, opt_sleep,
opt_disable_rseq, opt_threads = 200,
opt_disable_mod = 0, opt_test = 's';
static long long opt_reps = 5000;
static __thread __attribute__((tls_model("initial-exec")))
unsigned int signals_delivered;
#ifndef BENCHMARK
static __thread __attribute__((tls_model("initial-exec"), unused))
unsigned int yield_mod_cnt, nr_abort;
#define printf_verbose(fmt, ...) \
do { \
if (verbose) \
printf(fmt, ## __VA_ARGS__); \
} while (0)
#ifdef __i386__
#define INJECT_ASM_REG "eax"
#define RSEQ_INJECT_CLOBBER \
, INJECT_ASM_REG
#define RSEQ_INJECT_ASM(n) \
"mov asm_loop_cnt_" #n ", %%" INJECT_ASM_REG "\n\t" \
"test %%" INJECT_ASM_REG ",%%" INJECT_ASM_REG "\n\t" \
"jz 333f\n\t" \
"222:\n\t" \
"dec %%" INJECT_ASM_REG "\n\t" \
"jnz 222b\n\t" \
"333:\n\t"
#elif defined(__x86_64__)
#define INJECT_ASM_REG_P "rax"
#define INJECT_ASM_REG "eax"
#define RSEQ_INJECT_CLOBBER \
, INJECT_ASM_REG_P \
, INJECT_ASM_REG
#define RSEQ_INJECT_ASM(n) \
"lea asm_loop_cnt_" #n "(%%rip), %%" INJECT_ASM_REG_P "\n\t" \
"mov (%%" INJECT_ASM_REG_P "), %%" INJECT_ASM_REG "\n\t" \
"test %%" INJECT_ASM_REG ",%%" INJECT_ASM_REG "\n\t" \
"jz 333f\n\t" \
"222:\n\t" \
"dec %%" INJECT_ASM_REG "\n\t" \
"jnz 222b\n\t" \
"333:\n\t"
#elif defined(__s390__)
#define RSEQ_INJECT_INPUT \
, [loop_cnt_1]"m"(loop_cnt[1]) \
, [loop_cnt_2]"m"(loop_cnt[2]) \
, [loop_cnt_3]"m"(loop_cnt[3]) \
, [loop_cnt_4]"m"(loop_cnt[4]) \
, [loop_cnt_5]"m"(loop_cnt[5]) \
, [loop_cnt_6]"m"(loop_cnt[6])
#define INJECT_ASM_REG "r12"
#define RSEQ_INJECT_CLOBBER \
, INJECT_ASM_REG
#define RSEQ_INJECT_ASM(n) \
"l %%" INJECT_ASM_REG ", %[loop_cnt_" #n "]\n\t" \
"ltr %%" INJECT_ASM_REG ", %%" INJECT_ASM_REG "\n\t" \
"je 333f\n\t" \
"222:\n\t" \
"ahi %%" INJECT_ASM_REG ", -1\n\t" \
"jnz 222b\n\t" \
"333:\n\t"
#elif defined(__ARMEL__)
#define RSEQ_INJECT_INPUT \
, [loop_cnt_1]"m"(loop_cnt[1]) \
, [loop_cnt_2]"m"(loop_cnt[2]) \
, [loop_cnt_3]"m"(loop_cnt[3]) \
, [loop_cnt_4]"m"(loop_cnt[4]) \
, [loop_cnt_5]"m"(loop_cnt[5]) \
, [loop_cnt_6]"m"(loop_cnt[6])
#define INJECT_ASM_REG "r4"
#define RSEQ_INJECT_CLOBBER \
, INJECT_ASM_REG
#define RSEQ_INJECT_ASM(n) \
"ldr " INJECT_ASM_REG ", %[loop_cnt_" #n "]\n\t" \
"cmp " INJECT_ASM_REG ", #0\n\t" \
"beq 333f\n\t" \
"222:\n\t" \
"subs " INJECT_ASM_REG ", #1\n\t" \
"bne 222b\n\t" \
"333:\n\t"
#elif defined(__AARCH64EL__)
#define RSEQ_INJECT_INPUT \
, [loop_cnt_1] "Qo" (loop_cnt[1]) \
, [loop_cnt_2] "Qo" (loop_cnt[2]) \
, [loop_cnt_3] "Qo" (loop_cnt[3]) \
, [loop_cnt_4] "Qo" (loop_cnt[4]) \
, [loop_cnt_5] "Qo" (loop_cnt[5]) \
, [loop_cnt_6] "Qo" (loop_cnt[6])
#define INJECT_ASM_REG RSEQ_ASM_TMP_REG32
#define RSEQ_INJECT_ASM(n) \
" ldr " INJECT_ASM_REG ", %[loop_cnt_" #n "]\n" \
" cbz " INJECT_ASM_REG ", 333f\n" \
"222:\n" \
" sub " INJECT_ASM_REG ", " INJECT_ASM_REG ", #1\n" \
" cbnz " INJECT_ASM_REG ", 222b\n" \
"333:\n"
#elif defined(__PPC__)
#define RSEQ_INJECT_INPUT \
, [loop_cnt_1]"m"(loop_cnt[1]) \
, [loop_cnt_2]"m"(loop_cnt[2]) \
, [loop_cnt_3]"m"(loop_cnt[3]) \
, [loop_cnt_4]"m"(loop_cnt[4]) \
, [loop_cnt_5]"m"(loop_cnt[5]) \
, [loop_cnt_6]"m"(loop_cnt[6])
#define INJECT_ASM_REG "r18"
#define RSEQ_INJECT_CLOBBER \
, INJECT_ASM_REG
#define RSEQ_INJECT_ASM(n) \
"lwz %%" INJECT_ASM_REG ", %[loop_cnt_" #n "]\n\t" \
"cmpwi %%" INJECT_ASM_REG ", 0\n\t" \
"beq 333f\n\t" \
"222:\n\t" \
"subic. %%" INJECT_ASM_REG ", %%" INJECT_ASM_REG ", 1\n\t" \
"bne 222b\n\t" \
"333:\n\t"
#elif defined(__mips__)
#define RSEQ_INJECT_INPUT \
, [loop_cnt_1]"m"(loop_cnt[1]) \
, [loop_cnt_2]"m"(loop_cnt[2]) \
, [loop_cnt_3]"m"(loop_cnt[3]) \
, [loop_cnt_4]"m"(loop_cnt[4]) \
, [loop_cnt_5]"m"(loop_cnt[5]) \
, [loop_cnt_6]"m"(loop_cnt[6])
#define INJECT_ASM_REG "$5"
#define RSEQ_INJECT_CLOBBER \
, INJECT_ASM_REG
#define RSEQ_INJECT_ASM(n) \
"lw " INJECT_ASM_REG ", %[loop_cnt_" #n "]\n\t" \
"beqz " INJECT_ASM_REG ", 333f\n\t" \
"222:\n\t" \
"addiu " INJECT_ASM_REG ", -1\n\t" \
"bnez " INJECT_ASM_REG ", 222b\n\t" \
"333:\n\t"
#elif defined(__riscv)
#define RSEQ_INJECT_INPUT \
, [loop_cnt_1]"m"(loop_cnt[1]) \
, [loop_cnt_2]"m"(loop_cnt[2]) \
, [loop_cnt_3]"m"(loop_cnt[3]) \
, [loop_cnt_4]"m"(loop_cnt[4]) \
, [loop_cnt_5]"m"(loop_cnt[5]) \
, [loop_cnt_6]"m"(loop_cnt[6])
#define INJECT_ASM_REG "t1"
#define RSEQ_INJECT_CLOBBER \
, INJECT_ASM_REG
#define RSEQ_INJECT_ASM(n) \
"lw " INJECT_ASM_REG ", %[loop_cnt_" #n "]\n\t" \
"beqz " INJECT_ASM_REG ", 333f\n\t" \
"222:\n\t" \
"addi " INJECT_ASM_REG "," INJECT_ASM_REG ", -1\n\t" \
"bnez " INJECT_ASM_REG ", 222b\n\t" \
"333:\n\t"
#else
#error unsupported target
#endif
#define RSEQ_INJECT_FAILED \
nr_abort++;
#define RSEQ_INJECT_C(n) \
{ \
int loc_i, loc_nr_loops = loop_cnt[n]; \
\
for (loc_i = 0; loc_i < loc_nr_loops; loc_i++) { \
rseq_barrier(); \
} \
if (loc_nr_loops == -1 && opt_modulo) { \
if (yield_mod_cnt == opt_modulo - 1) { \
if (opt_sleep > 0) \
poll(NULL, 0, opt_sleep); \
if (opt_yield) \
sched_yield(); \
if (opt_signal) \
raise(SIGUSR1); \
yield_mod_cnt = 0; \
} else { \
yield_mod_cnt++; \
} \
} \
}
#else
#define printf_verbose(fmt, ...)
#endif /* BENCHMARK */
#include "rseq.h"
static enum rseq_mo opt_mo = RSEQ_MO_RELAXED;
#ifdef RSEQ_ARCH_HAS_OFFSET_DEREF_ADDV
#define TEST_MEMBARRIER
static int sys_membarrier(int cmd, int flags, int cpu_id)
{
return syscall(__NR_membarrier, cmd, flags, cpu_id);
}
#endif
#ifdef BUILDOPT_RSEQ_PERCPU_MM_CID
# define RSEQ_PERCPU RSEQ_PERCPU_MM_CID
static
int get_current_cpu_id(void)
{
return rseq_current_mm_cid();
}
static
bool rseq_validate_cpu_id(void)
{
return rseq_mm_cid_available();
}
# ifdef TEST_MEMBARRIER
/*
* Membarrier does not currently support targeting a mm_cid, so
* issue the barrier on all cpus.
*/
static
int rseq_membarrier_expedited(int cpu)
{
return sys_membarrier(MEMBARRIER_CMD_PRIVATE_EXPEDITED_RSEQ,
0, 0);
}
# endif /* TEST_MEMBARRIER */
#else
# define RSEQ_PERCPU RSEQ_PERCPU_CPU_ID
static
int get_current_cpu_id(void)
{
return rseq_cpu_start();
}
static
bool rseq_validate_cpu_id(void)
{
return rseq_current_cpu_raw() >= 0;
}
# ifdef TEST_MEMBARRIER
static
int rseq_membarrier_expedited(int cpu)
{
return sys_membarrier(MEMBARRIER_CMD_PRIVATE_EXPEDITED_RSEQ,
MEMBARRIER_CMD_FLAG_CPU, cpu);
}
# endif /* TEST_MEMBARRIER */
#endif
struct percpu_lock_entry {
intptr_t v;
} __attribute__((aligned(128)));
struct percpu_lock {
struct percpu_lock_entry c[CPU_SETSIZE];
};
struct test_data_entry {
intptr_t count;
} __attribute__((aligned(128)));
struct spinlock_test_data {
struct percpu_lock lock;
struct test_data_entry c[CPU_SETSIZE];
};
struct spinlock_thread_test_data {
struct spinlock_test_data *data;
long long reps;
int reg;
};
struct inc_test_data {
struct test_data_entry c[CPU_SETSIZE];
};
struct inc_thread_test_data {
struct inc_test_data *data;
long long reps;
int reg;
};
struct percpu_list_node {
intptr_t data;
struct percpu_list_node *next;
};
struct percpu_list_entry {
struct percpu_list_node *head;
} __attribute__((aligned(128)));
struct percpu_list {
struct percpu_list_entry c[CPU_SETSIZE];
};
#define BUFFER_ITEM_PER_CPU 100
struct percpu_buffer_node {
intptr_t data;
};
struct percpu_buffer_entry {
intptr_t offset;
intptr_t buflen;
struct percpu_buffer_node **array;
} __attribute__((aligned(128)));
struct percpu_buffer {
struct percpu_buffer_entry c[CPU_SETSIZE];
};
#define MEMCPY_BUFFER_ITEM_PER_CPU 100
struct percpu_memcpy_buffer_node {
intptr_t data1;
uint64_t data2;
};
struct percpu_memcpy_buffer_entry {
intptr_t offset;
intptr_t buflen;
struct percpu_memcpy_buffer_node *array;
} __attribute__((aligned(128)));
struct percpu_memcpy_buffer {
struct percpu_memcpy_buffer_entry c[CPU_SETSIZE];
};
/* A simple percpu spinlock. Grabs lock on current cpu. */
static int rseq_this_cpu_lock(struct percpu_lock *lock)
{
int cpu;
for (;;) {
int ret;
cpu = get_current_cpu_id();
if (cpu < 0) {
fprintf(stderr, "pid: %d: tid: %d, cpu: %d: cid: %d\n",
getpid(), (int) rseq_gettid(), rseq_current_cpu_raw(), cpu);
abort();
}
ret = rseq_cmpeqv_storev(RSEQ_MO_RELAXED, RSEQ_PERCPU,
&lock->c[cpu].v,
0, 1, cpu);
if (rseq_likely(!ret))
break;
/* Retry if comparison fails or rseq aborts. */
}
/*
* Acquire semantic when taking lock after control dependency.
* Matches rseq_smp_store_release().
*/
rseq_smp_acquire__after_ctrl_dep();
return cpu;
}
static void rseq_percpu_unlock(struct percpu_lock *lock, int cpu)
{
assert(lock->c[cpu].v == 1);
/*
* Release lock, with release semantic. Matches
* rseq_smp_acquire__after_ctrl_dep().
*/
rseq_smp_store_release(&lock->c[cpu].v, 0);
}
void *test_percpu_spinlock_thread(void *arg)
{
struct spinlock_thread_test_data *thread_data = arg;
struct spinlock_test_data *data = thread_data->data;
long long i, reps;
if (!opt_disable_rseq && thread_data->reg &&
rseq_register_current_thread())
abort();
reps = thread_data->reps;
for (i = 0; i < reps; i++) {
int cpu = rseq_this_cpu_lock(&data->lock);
data->c[cpu].count++;
rseq_percpu_unlock(&data->lock, cpu);
#ifndef BENCHMARK
if (i != 0 && !(i % (reps / 10)))
printf_verbose("tid %d: count %lld\n",
(int) rseq_gettid(), i);
#endif
}
printf_verbose("tid %d: number of rseq abort: %d, signals delivered: %u\n",
(int) rseq_gettid(), nr_abort, signals_delivered);
if (!opt_disable_rseq && thread_data->reg &&
rseq_unregister_current_thread())
abort();
return NULL;
}
/*
* A simple test which implements a sharded counter using a per-cpu
* lock. Obviously real applications might prefer to simply use a
* per-cpu increment; however, this is reasonable for a test and the
* lock can be extended to synchronize more complicated operations.
*/
void test_percpu_spinlock(void)
{
const int num_threads = opt_threads;
int i, ret;
uint64_t sum;
pthread_t test_threads[num_threads];
struct spinlock_test_data data;
struct spinlock_thread_test_data thread_data[num_threads];
memset(&data, 0, sizeof(data));
for (i = 0; i < num_threads; i++) {
thread_data[i].reps = opt_reps;
if (opt_disable_mod <= 0 || (i % opt_disable_mod))
thread_data[i].reg = 1;
else
thread_data[i].reg = 0;
thread_data[i].data = &data;
ret = pthread_create(&test_threads[i], NULL,
test_percpu_spinlock_thread,
&thread_data[i]);
if (ret) {
errno = ret;
perror("pthread_create");
abort();
}
}
for (i = 0; i < num_threads; i++) {
ret = pthread_join(test_threads[i], NULL);
if (ret) {
errno = ret;
perror("pthread_join");
abort();
}
}
sum = 0;
for (i = 0; i < CPU_SETSIZE; i++)
sum += data.c[i].count;
assert(sum == (uint64_t)opt_reps * num_threads);
}
void *test_percpu_inc_thread(void *arg)
{
struct inc_thread_test_data *thread_data = arg;
struct inc_test_data *data = thread_data->data;
long long i, reps;
if (!opt_disable_rseq && thread_data->reg &&
rseq_register_current_thread())
abort();
reps = thread_data->reps;
for (i = 0; i < reps; i++) {
int ret;
do {
int cpu;
cpu = get_current_cpu_id();
ret = rseq_addv(RSEQ_MO_RELAXED, RSEQ_PERCPU,
&data->c[cpu].count, 1, cpu);
} while (rseq_unlikely(ret));
#ifndef BENCHMARK
if (i != 0 && !(i % (reps / 10)))
printf_verbose("tid %d: count %lld\n",
(int) rseq_gettid(), i);
#endif
}
printf_verbose("tid %d: number of rseq abort: %d, signals delivered: %u\n",
(int) rseq_gettid(), nr_abort, signals_delivered);
if (!opt_disable_rseq && thread_data->reg &&
rseq_unregister_current_thread())
abort();
return NULL;
}
void test_percpu_inc(void)
{
const int num_threads = opt_threads;
int i, ret;
uint64_t sum;
pthread_t test_threads[num_threads];
struct inc_test_data data;
struct inc_thread_test_data thread_data[num_threads];
memset(&data, 0, sizeof(data));
for (i = 0; i < num_threads; i++) {
thread_data[i].reps = opt_reps;
if (opt_disable_mod <= 0 || (i % opt_disable_mod))
thread_data[i].reg = 1;
else
thread_data[i].reg = 0;
thread_data[i].data = &data;
ret = pthread_create(&test_threads[i], NULL,
test_percpu_inc_thread,
&thread_data[i]);
if (ret) {
errno = ret;
perror("pthread_create");
abort();
}
}
for (i = 0; i < num_threads; i++) {
ret = pthread_join(test_threads[i], NULL);
if (ret) {
errno = ret;
perror("pthread_join");
abort();
}
}
sum = 0;
for (i = 0; i < CPU_SETSIZE; i++)
sum += data.c[i].count;
assert(sum == (uint64_t)opt_reps * num_threads);
}
void this_cpu_list_push(struct percpu_list *list,
struct percpu_list_node *node,
int *_cpu)
{
int cpu;
for (;;) {
intptr_t *targetptr, newval, expect;
int ret;
cpu = get_current_cpu_id();
/* Load list->c[cpu].head with single-copy atomicity. */
expect = (intptr_t)RSEQ_READ_ONCE(list->c[cpu].head);
newval = (intptr_t)node;
targetptr = (intptr_t *)&list->c[cpu].head;
node->next = (struct percpu_list_node *)expect;
ret = rseq_cmpeqv_storev(RSEQ_MO_RELAXED, RSEQ_PERCPU,
targetptr, expect, newval, cpu);
if (rseq_likely(!ret))
break;
/* Retry if comparison fails or rseq aborts. */
}
if (_cpu)
*_cpu = cpu;
}
/*
* Unlike a traditional lock-less linked list; the availability of a
* rseq primitive allows us to implement pop without concerns over
* ABA-type races.
*/
struct percpu_list_node *this_cpu_list_pop(struct percpu_list *list,
int *_cpu)
{
struct percpu_list_node *node = NULL;
int cpu;
for (;;) {
struct percpu_list_node *head;
intptr_t *targetptr, expectnot, *load;
long offset;
int ret;
cpu = get_current_cpu_id();
targetptr = (intptr_t *)&list->c[cpu].head;
expectnot = (intptr_t)NULL;
offset = offsetof(struct percpu_list_node, next);
load = (intptr_t *)&head;
ret = rseq_cmpnev_storeoffp_load(RSEQ_MO_RELAXED, RSEQ_PERCPU,
targetptr, expectnot,
offset, load, cpu);
if (rseq_likely(!ret)) {
node = head;
break;
}
if (ret > 0)
break;
/* Retry if rseq aborts. */
}
if (_cpu)
*_cpu = cpu;
return node;
}
/*
* __percpu_list_pop is not safe against concurrent accesses. Should
* only be used on lists that are not concurrently modified.
*/
struct percpu_list_node *__percpu_list_pop(struct percpu_list *list, int cpu)
{
struct percpu_list_node *node;
node = list->c[cpu].head;
if (!node)
return NULL;
list->c[cpu].head = node->next;
return node;
}
void *test_percpu_list_thread(void *arg)
{
long long i, reps;
struct percpu_list *list = (struct percpu_list *)arg;
if (!opt_disable_rseq && rseq_register_current_thread())
abort();
reps = opt_reps;
for (i = 0; i < reps; i++) {
struct percpu_list_node *node;
node = this_cpu_list_pop(list, NULL);
if (opt_yield)
sched_yield(); /* encourage shuffling */
if (node)
this_cpu_list_push(list, node, NULL);
}
printf_verbose("tid %d: number of rseq abort: %d, signals delivered: %u\n",
(int) rseq_gettid(), nr_abort, signals_delivered);
if (!opt_disable_rseq && rseq_unregister_current_thread())
abort();
return NULL;
}
/* Simultaneous modification to a per-cpu linked list from many threads. */
void test_percpu_list(void)
{
const int num_threads = opt_threads;
int i, j, ret;
uint64_t sum = 0, expected_sum = 0;
struct percpu_list list;
pthread_t test_threads[num_threads];
cpu_set_t allowed_cpus;
memset(&list, 0, sizeof(list));
/* Generate list entries for every usable cpu. */
sched_getaffinity(0, sizeof(allowed_cpus), &allowed_cpus);
for (i = 0; i < CPU_SETSIZE; i++) {
if (!CPU_ISSET(i, &allowed_cpus))
continue;
for (j = 1; j <= 100; j++) {
struct percpu_list_node *node;
expected_sum += j;
node = malloc(sizeof(*node));
assert(node);
node->data = j;
node->next = list.c[i].head;
list.c[i].head = node;
}
}
for (i = 0; i < num_threads; i++) {
ret = pthread_create(&test_threads[i], NULL,
test_percpu_list_thread, &list);
if (ret) {
errno = ret;
perror("pthread_create");
abort();
}
}
for (i = 0; i < num_threads; i++) {
ret = pthread_join(test_threads[i], NULL);
if (ret) {
errno = ret;
perror("pthread_join");
abort();
}
}
for (i = 0; i < CPU_SETSIZE; i++) {
struct percpu_list_node *node;
if (!CPU_ISSET(i, &allowed_cpus))
continue;
while ((node = __percpu_list_pop(&list, i))) {
sum += node->data;
free(node);
}
}
/*
* All entries should now be accounted for (unless some external
* actor is interfering with our allowed affinity while this
* test is running).
*/
assert(sum == expected_sum);
}
bool this_cpu_buffer_push(struct percpu_buffer *buffer,
struct percpu_buffer_node *node,
int *_cpu)
{
bool result = false;
int cpu;
for (;;) {
intptr_t *targetptr_spec, newval_spec;
intptr_t *targetptr_final, newval_final;
intptr_t offset;
int ret;
cpu = get_current_cpu_id();
offset = RSEQ_READ_ONCE(buffer->c[cpu].offset);
if (offset == buffer->c[cpu].buflen)
break;
newval_spec = (intptr_t)node;
targetptr_spec = (intptr_t *)&buffer->c[cpu].array[offset];
newval_final = offset + 1;
targetptr_final = &buffer->c[cpu].offset;
ret = rseq_cmpeqv_trystorev_storev(opt_mo, RSEQ_PERCPU,
targetptr_final, offset, targetptr_spec,
newval_spec, newval_final, cpu);
if (rseq_likely(!ret)) {
result = true;
break;
}
/* Retry if comparison fails or rseq aborts. */
}
if (_cpu)
*_cpu = cpu;
return result;
}
struct percpu_buffer_node *this_cpu_buffer_pop(struct percpu_buffer *buffer,
int *_cpu)
{
struct percpu_buffer_node *head;
int cpu;
for (;;) {
intptr_t *targetptr, newval;
intptr_t offset;
int ret;
cpu = get_current_cpu_id();
/* Load offset with single-copy atomicity. */
offset = RSEQ_READ_ONCE(buffer->c[cpu].offset);
if (offset == 0) {
head = NULL;
break;
}
head = RSEQ_READ_ONCE(buffer->c[cpu].array[offset - 1]);
newval = offset - 1;
targetptr = (intptr_t *)&buffer->c[cpu].offset;
ret = rseq_cmpeqv_cmpeqv_storev(RSEQ_MO_RELAXED, RSEQ_PERCPU,
targetptr, offset,
(intptr_t *)&buffer->c[cpu].array[offset - 1],
(intptr_t)head, newval, cpu);
if (rseq_likely(!ret))
break;
/* Retry if comparison fails or rseq aborts. */
}
if (_cpu)
*_cpu = cpu;
return head;
}
/*
* __percpu_buffer_pop is not safe against concurrent accesses. Should
* only be used on buffers that are not concurrently modified.
*/
struct percpu_buffer_node *__percpu_buffer_pop(struct percpu_buffer *buffer,
int cpu)
{
struct percpu_buffer_node *head;
intptr_t offset;
offset = buffer->c[cpu].offset;
if (offset == 0)
return NULL;
head = buffer->c[cpu].array[offset - 1];
buffer->c[cpu].offset = offset - 1;
return head;
}
void *test_percpu_buffer_thread(void *arg)
{
long long i, reps;
struct percpu_buffer *buffer = (struct percpu_buffer *)arg;
if (!opt_disable_rseq && rseq_register_current_thread())
abort();
reps = opt_reps;
for (i = 0; i < reps; i++) {
struct percpu_buffer_node *node;
node = this_cpu_buffer_pop(buffer, NULL);
if (opt_yield)
sched_yield(); /* encourage shuffling */
if (node) {
if (!this_cpu_buffer_push(buffer, node, NULL)) {
/* Should increase buffer size. */
abort();
}
}
}
printf_verbose("tid %d: number of rseq abort: %d, signals delivered: %u\n",
(int) rseq_gettid(), nr_abort, signals_delivered);
if (!opt_disable_rseq && rseq_unregister_current_thread())
abort();
return NULL;
}
/* Simultaneous modification to a per-cpu buffer from many threads. */
void test_percpu_buffer(void)
{
const int num_threads = opt_threads;
int i, j, ret;
uint64_t sum = 0, expected_sum = 0;
struct percpu_buffer buffer;
pthread_t test_threads[num_threads];
cpu_set_t allowed_cpus;
memset(&buffer, 0, sizeof(buffer));
/* Generate list entries for every usable cpu. */
sched_getaffinity(0, sizeof(allowed_cpus), &allowed_cpus);
for (i = 0; i < CPU_SETSIZE; i++) {
if (!CPU_ISSET(i, &allowed_cpus))
continue;
/* Worse-case is every item in same CPU. */
buffer.c[i].array =
malloc(sizeof(*buffer.c[i].array) * CPU_SETSIZE *
BUFFER_ITEM_PER_CPU);
assert(buffer.c[i].array);
buffer.c[i].buflen = CPU_SETSIZE * BUFFER_ITEM_PER_CPU;
for (j = 1; j <= BUFFER_ITEM_PER_CPU; j++) {
struct percpu_buffer_node *node;
expected_sum += j;
/*
* We could theoretically put the word-sized
* "data" directly in the buffer. However, we
* want to model objects that would not fit
* within a single word, so allocate an object
* for each node.
*/
node = malloc(sizeof(*node));
assert(node);
node->data = j;
buffer.c[i].array[j - 1] = node;
buffer.c[i].offset++;
}
}
for (i = 0; i < num_threads; i++) {
ret = pthread_create(&test_threads[i], NULL,
test_percpu_buffer_thread, &buffer);
if (ret) {
errno = ret;
perror("pthread_create");
abort();
}
}
for (i = 0; i < num_threads; i++) {
ret = pthread_join(test_threads[i], NULL);
if (ret) {
errno = ret;
perror("pthread_join");
abort();
}
}
for (i = 0; i < CPU_SETSIZE; i++) {
struct percpu_buffer_node *node;
if (!CPU_ISSET(i, &allowed_cpus))
continue;
while ((node = __percpu_buffer_pop(&buffer, i))) {
sum += node->data;
free(node);
}
free(buffer.c[i].array);
}
/*
* All entries should now be accounted for (unless some external
* actor is interfering with our allowed affinity while this
* test is running).
*/
assert(sum == expected_sum);
}
bool this_cpu_memcpy_buffer_push(struct percpu_memcpy_buffer *buffer,
struct percpu_memcpy_buffer_node item,
int *_cpu)
{
bool result = false;
int cpu;
for (;;) {
intptr_t *targetptr_final, newval_final, offset;
char *destptr, *srcptr;
size_t copylen;
int ret;
cpu = get_current_cpu_id();
/* Load offset with single-copy atomicity. */
offset = RSEQ_READ_ONCE(buffer->c[cpu].offset);
if (offset == buffer->c[cpu].buflen)
break;
destptr = (char *)&buffer->c[cpu].array[offset];
srcptr = (char *)&item;
/* copylen must be <= 4kB. */
copylen = sizeof(item);
newval_final = offset + 1;
targetptr_final = &buffer->c[cpu].offset;
ret = rseq_cmpeqv_trymemcpy_storev(
opt_mo, RSEQ_PERCPU,
targetptr_final, offset,
destptr, srcptr, copylen,
newval_final, cpu);
if (rseq_likely(!ret)) {
result = true;
break;
}
/* Retry if comparison fails or rseq aborts. */
}
if (_cpu)
*_cpu = cpu;
return result;
}
bool this_cpu_memcpy_buffer_pop(struct percpu_memcpy_buffer *buffer,
struct percpu_memcpy_buffer_node *item,
int *_cpu)
{
bool result = false;
int cpu;
for (;;) {
intptr_t *targetptr_final, newval_final, offset;
char *destptr, *srcptr;
size_t copylen;
int ret;
cpu = get_current_cpu_id();
/* Load offset with single-copy atomicity. */
offset = RSEQ_READ_ONCE(buffer->c[cpu].offset);
if (offset == 0)
break;
destptr = (char *)item;
srcptr = (char *)&buffer->c[cpu].array[offset - 1];
/* copylen must be <= 4kB. */
copylen = sizeof(*item);
newval_final = offset - 1;
targetptr_final = &buffer->c[cpu].offset;
ret = rseq_cmpeqv_trymemcpy_storev(RSEQ_MO_RELAXED, RSEQ_PERCPU,
targetptr_final, offset, destptr, srcptr, copylen,
newval_final, cpu);
if (rseq_likely(!ret)) {
result = true;
break;
}
/* Retry if comparison fails or rseq aborts. */
}
if (_cpu)
*_cpu = cpu;
return result;
}
/*
* __percpu_memcpy_buffer_pop is not safe against concurrent accesses. Should
* only be used on buffers that are not concurrently modified.
*/
bool __percpu_memcpy_buffer_pop(struct percpu_memcpy_buffer *buffer,
struct percpu_memcpy_buffer_node *item,
int cpu)
{
intptr_t offset;
offset = buffer->c[cpu].offset;
if (offset == 0)
return false;
memcpy(item, &buffer->c[cpu].array[offset - 1], sizeof(*item));
buffer->c[cpu].offset = offset - 1;
return true;
}
void *test_percpu_memcpy_buffer_thread(void *arg)
{
long long i, reps;
struct percpu_memcpy_buffer *buffer = (struct percpu_memcpy_buffer *)arg;
if (!opt_disable_rseq && rseq_register_current_thread())
abort();
reps = opt_reps;
for (i = 0; i < reps; i++) {
struct percpu_memcpy_buffer_node item;
bool result;
result = this_cpu_memcpy_buffer_pop(buffer, &item, NULL);
if (opt_yield)
sched_yield(); /* encourage shuffling */
if (result) {
if (!this_cpu_memcpy_buffer_push(buffer, item, NULL)) {
/* Should increase buffer size. */
abort();
}
}
}
printf_verbose("tid %d: number of rseq abort: %d, signals delivered: %u\n",
(int) rseq_gettid(), nr_abort, signals_delivered);
if (!opt_disable_rseq && rseq_unregister_current_thread())
abort();
return NULL;
}
/* Simultaneous modification to a per-cpu buffer from many threads. */
void test_percpu_memcpy_buffer(void)
{
const int num_threads = opt_threads;
int i, j, ret;
uint64_t sum = 0, expected_sum = 0;
struct percpu_memcpy_buffer buffer;
pthread_t test_threads[num_threads];
cpu_set_t allowed_cpus;
memset(&buffer, 0, sizeof(buffer));
/* Generate list entries for every usable cpu. */
sched_getaffinity(0, sizeof(allowed_cpus), &allowed_cpus);
for (i = 0; i < CPU_SETSIZE; i++) {
if (!CPU_ISSET(i, &allowed_cpus))
continue;
/* Worse-case is every item in same CPU. */
buffer.c[i].array =
malloc(sizeof(*buffer.c[i].array) * CPU_SETSIZE *
MEMCPY_BUFFER_ITEM_PER_CPU);
assert(buffer.c[i].array);
buffer.c[i].buflen = CPU_SETSIZE * MEMCPY_BUFFER_ITEM_PER_CPU;
for (j = 1; j <= MEMCPY_BUFFER_ITEM_PER_CPU; j++) {
expected_sum += 2 * j + 1;
/*
* We could theoretically put the word-sized
* "data" directly in the buffer. However, we
* want to model objects that would not fit
* within a single word, so allocate an object
* for each node.
*/
buffer.c[i].array[j - 1].data1 = j;
buffer.c[i].array[j - 1].data2 = j + 1;
buffer.c[i].offset++;
}
}
for (i = 0; i < num_threads; i++) {
ret = pthread_create(&test_threads[i], NULL,
test_percpu_memcpy_buffer_thread,
&buffer);
if (ret) {
errno = ret;
perror("pthread_create");
abort();
}
}
for (i = 0; i < num_threads; i++) {
ret = pthread_join(test_threads[i], NULL);
if (ret) {
errno = ret;
perror("pthread_join");
abort();
}
}
for (i = 0; i < CPU_SETSIZE; i++) {
struct percpu_memcpy_buffer_node item;
if (!CPU_ISSET(i, &allowed_cpus))
continue;
while (__percpu_memcpy_buffer_pop(&buffer, &item, i)) {
sum += item.data1;
sum += item.data2;
}
free(buffer.c[i].array);
}
/*
* All entries should now be accounted for (unless some external
* actor is interfering with our allowed affinity while this
* test is running).
*/
assert(sum == expected_sum);
}
static void test_signal_interrupt_handler(int signo)
{
signals_delivered++;
}
static int set_signal_handler(void)
{
int ret = 0;
struct sigaction sa;
sigset_t sigset;
ret = sigemptyset(&sigset);
if (ret < 0) {
perror("sigemptyset");
return ret;
}
sa.sa_handler = test_signal_interrupt_handler;
sa.sa_mask = sigset;
sa.sa_flags = 0;
ret = sigaction(SIGUSR1, &sa, NULL);
if (ret < 0) {
perror("sigaction");
return ret;
}
printf_verbose("Signal handler set for SIGUSR1\n");
return ret;
}
/* Test MEMBARRIER_CMD_PRIVATE_RESTART_RSEQ_ON_CPU membarrier command. */
#ifdef TEST_MEMBARRIER
struct test_membarrier_thread_args {
int stop;
intptr_t percpu_list_ptr;
};
/* Worker threads modify data in their "active" percpu lists. */
void *test_membarrier_worker_thread(void *arg)
{
struct test_membarrier_thread_args *args =
(struct test_membarrier_thread_args *)arg;
const int iters = opt_reps;
int i;
if (rseq_register_current_thread()) {
fprintf(stderr, "Error: rseq_register_current_thread(...) failed(%d): %s\n",
errno, strerror(errno));
abort();
}
/* Wait for initialization. */
while (!atomic_load(&args->percpu_list_ptr)) {}
for (i = 0; i < iters; ++i) {
int ret;
do {
int cpu = get_current_cpu_id();
ret = rseq_offset_deref_addv(RSEQ_MO_RELAXED, RSEQ_PERCPU,
&args->percpu_list_ptr,
sizeof(struct percpu_list_entry) * cpu, 1, cpu);
} while (rseq_unlikely(ret));
}
if (rseq_unregister_current_thread()) {
fprintf(stderr, "Error: rseq_unregister_current_thread(...) failed(%d): %s\n",
errno, strerror(errno));
abort();
}
return NULL;
}
void test_membarrier_init_percpu_list(struct percpu_list *list)
{
int i;
memset(list, 0, sizeof(*list));
for (i = 0; i < CPU_SETSIZE; i++) {
struct percpu_list_node *node;
node = malloc(sizeof(*node));
assert(node);
node->data = 0;
node->next = NULL;
list->c[i].head = node;
}
}
void test_membarrier_free_percpu_list(struct percpu_list *list)
{
int i;
for (i = 0; i < CPU_SETSIZE; i++)
free(list->c[i].head);
}
/*
* The manager thread swaps per-cpu lists that worker threads see,
* and validates that there are no unexpected modifications.
*/
void *test_membarrier_manager_thread(void *arg)
{
struct test_membarrier_thread_args *args =
(struct test_membarrier_thread_args *)arg;
struct percpu_list list_a, list_b;
intptr_t expect_a = 0, expect_b = 0;
int cpu_a = 0, cpu_b = 0;
if (rseq_register_current_thread()) {
fprintf(stderr, "Error: rseq_register_current_thread(...) failed(%d): %s\n",
errno, strerror(errno));
abort();
}
/* Init lists. */
test_membarrier_init_percpu_list(&list_a);
test_membarrier_init_percpu_list(&list_b);
atomic_store(&args->percpu_list_ptr, (intptr_t)&list_a);
while (!atomic_load(&args->stop)) {
/* list_a is "active". */
cpu_a = rand() % CPU_SETSIZE;
/*
* As list_b is "inactive", we should never see changes
* to list_b.
*/
if (expect_b != atomic_load(&list_b.c[cpu_b].head->data)) {
fprintf(stderr, "Membarrier test failed\n");
abort();
}
/* Make list_b "active". */
atomic_store(&args->percpu_list_ptr, (intptr_t)&list_b);
if (rseq_membarrier_expedited(cpu_a) &&
errno != ENXIO /* missing CPU */) {
perror("sys_membarrier");
abort();
}
/*
* Cpu A should now only modify list_b, so the values
* in list_a should be stable.
*/
expect_a = atomic_load(&list_a.c[cpu_a].head->data);
cpu_b = rand() % CPU_SETSIZE;
/*
* As list_a is "inactive", we should never see changes
* to list_a.
*/
if (expect_a != atomic_load(&list_a.c[cpu_a].head->data)) {
fprintf(stderr, "Membarrier test failed\n");
abort();
}
/* Make list_a "active". */
atomic_store(&args->percpu_list_ptr, (intptr_t)&list_a);
if (rseq_membarrier_expedited(cpu_b) &&
errno != ENXIO /* missing CPU*/) {
perror("sys_membarrier");
abort();
}
/* Remember a value from list_b. */
expect_b = atomic_load(&list_b.c[cpu_b].head->data);
}
test_membarrier_free_percpu_list(&list_a);
test_membarrier_free_percpu_list(&list_b);
if (rseq_unregister_current_thread()) {
fprintf(stderr, "Error: rseq_unregister_current_thread(...) failed(%d): %s\n",
errno, strerror(errno));
abort();
}
return NULL;
}
void test_membarrier(void)
{
const int num_threads = opt_threads;
struct test_membarrier_thread_args thread_args;
pthread_t worker_threads[num_threads];
pthread_t manager_thread;
int i, ret;
if (sys_membarrier(MEMBARRIER_CMD_REGISTER_PRIVATE_EXPEDITED_RSEQ, 0, 0)) {
perror("sys_membarrier");
abort();
}
thread_args.stop = 0;
thread_args.percpu_list_ptr = 0;
ret = pthread_create(&manager_thread, NULL,
test_membarrier_manager_thread, &thread_args);
if (ret) {
errno = ret;
perror("pthread_create");
abort();
}
for (i = 0; i < num_threads; i++) {
ret = pthread_create(&worker_threads[i], NULL,
test_membarrier_worker_thread, &thread_args);
if (ret) {
errno = ret;
perror("pthread_create");
abort();
}
}
for (i = 0; i < num_threads; i++) {
ret = pthread_join(worker_threads[i], NULL);
if (ret) {
errno = ret;
perror("pthread_join");
abort();
}
}
atomic_store(&thread_args.stop, 1);
ret = pthread_join(manager_thread, NULL);
if (ret) {
errno = ret;
perror("pthread_join");
abort();
}
}
#else /* TEST_MEMBARRIER */
void test_membarrier(void)
{
fprintf(stderr, "rseq_offset_deref_addv is not implemented on this architecture. "
"Skipping membarrier test.\n");
}
#endif
static void show_usage(int argc, char **argv)
{
printf("Usage : %s <OPTIONS>\n",
argv[0]);
printf("OPTIONS:\n");
printf(" [-1 loops] Number of loops for delay injection 1\n");
printf(" [-2 loops] Number of loops for delay injection 2\n");
printf(" [-3 loops] Number of loops for delay injection 3\n");
printf(" [-4 loops] Number of loops for delay injection 4\n");
printf(" [-5 loops] Number of loops for delay injection 5\n");
printf(" [-6 loops] Number of loops for delay injection 6\n");
printf(" [-7 loops] Number of loops for delay injection 7 (-1 to enable -m)\n");
printf(" [-8 loops] Number of loops for delay injection 8 (-1 to enable -m)\n");
printf(" [-9 loops] Number of loops for delay injection 9 (-1 to enable -m)\n");
printf(" [-m N] Yield/sleep/kill every modulo N (default 0: disabled) (>= 0)\n");
printf(" [-y] Yield\n");
printf(" [-k] Kill thread with signal\n");
printf(" [-s S] S: =0: disabled (default), >0: sleep time (ms)\n");
printf(" [-t N] Number of threads (default 200)\n");
printf(" [-r N] Number of repetitions per thread (default 5000)\n");
printf(" [-d] Disable rseq system call (no initialization)\n");
printf(" [-D M] Disable rseq for each M threads\n");
printf(" [-T test] Choose test: (s)pinlock, (l)ist, (b)uffer, (m)emcpy, (i)ncrement, membarrie(r)\n");
printf(" [-M] Push into buffer and memcpy buffer with memory barriers.\n");
printf(" [-v] Verbose output.\n");
printf(" [-h] Show this help.\n");
printf("\n");
}
int main(int argc, char **argv)
{
int i;
for (i = 1; i < argc; i++) {
if (argv[i][0] != '-')
continue;
switch (argv[i][1]) {
case '1':
case '2':
case '3':
case '4':
case '5':
case '6':
case '7':
case '8':
case '9':
if (argc < i + 2) {
show_usage(argc, argv);
goto error;
}
loop_cnt[argv[i][1] - '0'] = atol(argv[i + 1]);
i++;
break;
case 'm':
if (argc < i + 2) {
show_usage(argc, argv);
goto error;
}
opt_modulo = atol(argv[i + 1]);
if (opt_modulo < 0) {
show_usage(argc, argv);
goto error;
}
i++;
break;
case 's':
if (argc < i + 2) {
show_usage(argc, argv);
goto error;
}
opt_sleep = atol(argv[i + 1]);
if (opt_sleep < 0) {
show_usage(argc, argv);
goto error;
}
i++;
break;
case 'y':
opt_yield = 1;
break;
case 'k':
opt_signal = 1;
break;
case 'd':
opt_disable_rseq = 1;
break;
case 'D':
if (argc < i + 2) {
show_usage(argc, argv);
goto error;
}
opt_disable_mod = atol(argv[i + 1]);
if (opt_disable_mod < 0) {
show_usage(argc, argv);
goto error;
}
i++;
break;
case 't':
if (argc < i + 2) {
show_usage(argc, argv);
goto error;
}
opt_threads = atol(argv[i + 1]);
if (opt_threads < 0) {
show_usage(argc, argv);
goto error;
}
i++;
break;
case 'r':
if (argc < i + 2) {
show_usage(argc, argv);
goto error;
}
opt_reps = atoll(argv[i + 1]);
if (opt_reps < 0) {
show_usage(argc, argv);
goto error;
}
i++;
break;
case 'h':
show_usage(argc, argv);
goto end;
case 'T':
if (argc < i + 2) {
show_usage(argc, argv);
goto error;
}
opt_test = *argv[i + 1];
switch (opt_test) {
case 's':
case 'l':
case 'i':
case 'b':
case 'm':
case 'r':
break;
default:
show_usage(argc, argv);
goto error;
}
i++;
break;
case 'v':
verbose = 1;
break;
case 'M':
opt_mo = RSEQ_MO_RELEASE;
break;
default:
show_usage(argc, argv);
goto error;
}
}
loop_cnt_1 = loop_cnt[1];
loop_cnt_2 = loop_cnt[2];
loop_cnt_3 = loop_cnt[3];
loop_cnt_4 = loop_cnt[4];
loop_cnt_5 = loop_cnt[5];
loop_cnt_6 = loop_cnt[6];
if (set_signal_handler())
goto error;
if (!opt_disable_rseq && rseq_register_current_thread())
goto error;
if (!opt_disable_rseq && !rseq_validate_cpu_id()) {
fprintf(stderr, "Error: cpu id getter unavailable\n");
goto error;
}
switch (opt_test) {
case 's':
printf_verbose("spinlock\n");
test_percpu_spinlock();
break;
case 'l':
printf_verbose("linked list\n");
test_percpu_list();
break;
case 'b':
printf_verbose("buffer\n");
test_percpu_buffer();
break;
case 'm':
printf_verbose("memcpy buffer\n");
test_percpu_memcpy_buffer();
break;
case 'i':
printf_verbose("counter increment\n");
test_percpu_inc();
break;
case 'r':
printf_verbose("membarrier\n");
test_membarrier();
break;
}
if (!opt_disable_rseq && rseq_unregister_current_thread())
abort();
end:
return 0;
error:
return -1;
}
| linux-master | tools/testing/selftests/rseq/param_test.c |
// SPDX-License-Identifier: LGPL-2.1
#define _GNU_SOURCE
#include <assert.h>
#include <pthread.h>
#include <sched.h>
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <stddef.h>
#include "../kselftest.h"
#include "rseq.h"
#ifdef BUILDOPT_RSEQ_PERCPU_MM_CID
# define RSEQ_PERCPU RSEQ_PERCPU_MM_CID
static
int get_current_cpu_id(void)
{
return rseq_current_mm_cid();
}
static
bool rseq_validate_cpu_id(void)
{
return rseq_mm_cid_available();
}
#else
# define RSEQ_PERCPU RSEQ_PERCPU_CPU_ID
static
int get_current_cpu_id(void)
{
return rseq_cpu_start();
}
static
bool rseq_validate_cpu_id(void)
{
return rseq_current_cpu_raw() >= 0;
}
#endif
struct percpu_lock_entry {
intptr_t v;
} __attribute__((aligned(128)));
struct percpu_lock {
struct percpu_lock_entry c[CPU_SETSIZE];
};
struct test_data_entry {
intptr_t count;
} __attribute__((aligned(128)));
struct spinlock_test_data {
struct percpu_lock lock;
struct test_data_entry c[CPU_SETSIZE];
int reps;
};
struct percpu_list_node {
intptr_t data;
struct percpu_list_node *next;
};
struct percpu_list_entry {
struct percpu_list_node *head;
} __attribute__((aligned(128)));
struct percpu_list {
struct percpu_list_entry c[CPU_SETSIZE];
};
/* A simple percpu spinlock. Returns the cpu lock was acquired on. */
int rseq_this_cpu_lock(struct percpu_lock *lock)
{
int cpu;
for (;;) {
int ret;
cpu = get_current_cpu_id();
ret = rseq_cmpeqv_storev(RSEQ_MO_RELAXED, RSEQ_PERCPU,
&lock->c[cpu].v, 0, 1, cpu);
if (rseq_likely(!ret))
break;
/* Retry if comparison fails or rseq aborts. */
}
/*
* Acquire semantic when taking lock after control dependency.
* Matches rseq_smp_store_release().
*/
rseq_smp_acquire__after_ctrl_dep();
return cpu;
}
void rseq_percpu_unlock(struct percpu_lock *lock, int cpu)
{
assert(lock->c[cpu].v == 1);
/*
* Release lock, with release semantic. Matches
* rseq_smp_acquire__after_ctrl_dep().
*/
rseq_smp_store_release(&lock->c[cpu].v, 0);
}
void *test_percpu_spinlock_thread(void *arg)
{
struct spinlock_test_data *data = arg;
int i, cpu;
if (rseq_register_current_thread()) {
fprintf(stderr, "Error: rseq_register_current_thread(...) failed(%d): %s\n",
errno, strerror(errno));
abort();
}
for (i = 0; i < data->reps; i++) {
cpu = rseq_this_cpu_lock(&data->lock);
data->c[cpu].count++;
rseq_percpu_unlock(&data->lock, cpu);
}
if (rseq_unregister_current_thread()) {
fprintf(stderr, "Error: rseq_unregister_current_thread(...) failed(%d): %s\n",
errno, strerror(errno));
abort();
}
return NULL;
}
/*
* A simple test which implements a sharded counter using a per-cpu
* lock. Obviously real applications might prefer to simply use a
* per-cpu increment; however, this is reasonable for a test and the
* lock can be extended to synchronize more complicated operations.
*/
void test_percpu_spinlock(void)
{
const int num_threads = 200;
int i;
uint64_t sum;
pthread_t test_threads[num_threads];
struct spinlock_test_data data;
memset(&data, 0, sizeof(data));
data.reps = 5000;
for (i = 0; i < num_threads; i++)
pthread_create(&test_threads[i], NULL,
test_percpu_spinlock_thread, &data);
for (i = 0; i < num_threads; i++)
pthread_join(test_threads[i], NULL);
sum = 0;
for (i = 0; i < CPU_SETSIZE; i++)
sum += data.c[i].count;
assert(sum == (uint64_t)data.reps * num_threads);
}
void this_cpu_list_push(struct percpu_list *list,
struct percpu_list_node *node,
int *_cpu)
{
int cpu;
for (;;) {
intptr_t *targetptr, newval, expect;
int ret;
cpu = get_current_cpu_id();
/* Load list->c[cpu].head with single-copy atomicity. */
expect = (intptr_t)RSEQ_READ_ONCE(list->c[cpu].head);
newval = (intptr_t)node;
targetptr = (intptr_t *)&list->c[cpu].head;
node->next = (struct percpu_list_node *)expect;
ret = rseq_cmpeqv_storev(RSEQ_MO_RELAXED, RSEQ_PERCPU,
targetptr, expect, newval, cpu);
if (rseq_likely(!ret))
break;
/* Retry if comparison fails or rseq aborts. */
}
if (_cpu)
*_cpu = cpu;
}
/*
* Unlike a traditional lock-less linked list; the availability of a
* rseq primitive allows us to implement pop without concerns over
* ABA-type races.
*/
struct percpu_list_node *this_cpu_list_pop(struct percpu_list *list,
int *_cpu)
{
for (;;) {
struct percpu_list_node *head;
intptr_t *targetptr, expectnot, *load;
long offset;
int ret, cpu;
cpu = get_current_cpu_id();
targetptr = (intptr_t *)&list->c[cpu].head;
expectnot = (intptr_t)NULL;
offset = offsetof(struct percpu_list_node, next);
load = (intptr_t *)&head;
ret = rseq_cmpnev_storeoffp_load(RSEQ_MO_RELAXED, RSEQ_PERCPU,
targetptr, expectnot,
offset, load, cpu);
if (rseq_likely(!ret)) {
if (_cpu)
*_cpu = cpu;
return head;
}
if (ret > 0)
return NULL;
/* Retry if rseq aborts. */
}
}
/*
* __percpu_list_pop is not safe against concurrent accesses. Should
* only be used on lists that are not concurrently modified.
*/
struct percpu_list_node *__percpu_list_pop(struct percpu_list *list, int cpu)
{
struct percpu_list_node *node;
node = list->c[cpu].head;
if (!node)
return NULL;
list->c[cpu].head = node->next;
return node;
}
void *test_percpu_list_thread(void *arg)
{
int i;
struct percpu_list *list = (struct percpu_list *)arg;
if (rseq_register_current_thread()) {
fprintf(stderr, "Error: rseq_register_current_thread(...) failed(%d): %s\n",
errno, strerror(errno));
abort();
}
for (i = 0; i < 100000; i++) {
struct percpu_list_node *node;
node = this_cpu_list_pop(list, NULL);
sched_yield(); /* encourage shuffling */
if (node)
this_cpu_list_push(list, node, NULL);
}
if (rseq_unregister_current_thread()) {
fprintf(stderr, "Error: rseq_unregister_current_thread(...) failed(%d): %s\n",
errno, strerror(errno));
abort();
}
return NULL;
}
/* Simultaneous modification to a per-cpu linked list from many threads. */
void test_percpu_list(void)
{
int i, j;
uint64_t sum = 0, expected_sum = 0;
struct percpu_list list;
pthread_t test_threads[200];
cpu_set_t allowed_cpus;
memset(&list, 0, sizeof(list));
/* Generate list entries for every usable cpu. */
sched_getaffinity(0, sizeof(allowed_cpus), &allowed_cpus);
for (i = 0; i < CPU_SETSIZE; i++) {
if (!CPU_ISSET(i, &allowed_cpus))
continue;
for (j = 1; j <= 100; j++) {
struct percpu_list_node *node;
expected_sum += j;
node = malloc(sizeof(*node));
assert(node);
node->data = j;
node->next = list.c[i].head;
list.c[i].head = node;
}
}
for (i = 0; i < 200; i++)
pthread_create(&test_threads[i], NULL,
test_percpu_list_thread, &list);
for (i = 0; i < 200; i++)
pthread_join(test_threads[i], NULL);
for (i = 0; i < CPU_SETSIZE; i++) {
struct percpu_list_node *node;
if (!CPU_ISSET(i, &allowed_cpus))
continue;
while ((node = __percpu_list_pop(&list, i))) {
sum += node->data;
free(node);
}
}
/*
* All entries should now be accounted for (unless some external
* actor is interfering with our allowed affinity while this
* test is running).
*/
assert(sum == expected_sum);
}
int main(int argc, char **argv)
{
if (rseq_register_current_thread()) {
fprintf(stderr, "Error: rseq_register_current_thread(...) failed(%d): %s\n",
errno, strerror(errno));
goto error;
}
if (!rseq_validate_cpu_id()) {
fprintf(stderr, "Error: cpu id getter unavailable\n");
goto error;
}
printf("spinlock\n");
test_percpu_spinlock();
printf("percpu_list\n");
test_percpu_list();
if (rseq_unregister_current_thread()) {
fprintf(stderr, "Error: rseq_unregister_current_thread(...) failed(%d): %s\n",
errno, strerror(errno));
goto error;
}
return 0;
error:
return -1;
}
| linux-master | tools/testing/selftests/rseq/basic_percpu_ops_test.c |
// SPDX-License-Identifier: LGPL-2.1
/*
* Basic test coverage for critical regions and rseq_current_cpu().
*/
#define _GNU_SOURCE
#include <assert.h>
#include <sched.h>
#include <signal.h>
#include <stdio.h>
#include <string.h>
#include <sys/time.h>
#include "rseq.h"
void test_cpu_pointer(void)
{
cpu_set_t affinity, test_affinity;
int i;
sched_getaffinity(0, sizeof(affinity), &affinity);
CPU_ZERO(&test_affinity);
for (i = 0; i < CPU_SETSIZE; i++) {
if (CPU_ISSET(i, &affinity)) {
int node;
CPU_SET(i, &test_affinity);
sched_setaffinity(0, sizeof(test_affinity),
&test_affinity);
assert(sched_getcpu() == i);
assert(rseq_current_cpu() == i);
assert(rseq_current_cpu_raw() == i);
assert(rseq_cpu_start() == i);
node = rseq_fallback_current_node();
assert(rseq_current_node_id() == node);
CPU_CLR(i, &test_affinity);
}
}
sched_setaffinity(0, sizeof(affinity), &affinity);
}
int main(int argc, char **argv)
{
if (rseq_register_current_thread()) {
fprintf(stderr, "Error: rseq_register_current_thread(...) failed(%d): %s\n",
errno, strerror(errno));
goto init_thread_error;
}
printf("testing current cpu\n");
test_cpu_pointer();
if (rseq_unregister_current_thread()) {
fprintf(stderr, "Error: rseq_unregister_current_thread(...) failed(%d): %s\n",
errno, strerror(errno));
goto init_thread_error;
}
return 0;
init_thread_error:
return -1;
}
| linux-master | tools/testing/selftests/rseq/basic_test.c |
// SPDX-License-Identifier: GPL-2.0
#define _GNU_SOURCE
#include <stdio.h>
#include <errno.h>
#include <pwd.h>
#include <grp.h>
#include <string.h>
#include <syscall.h>
#include <sys/capability.h>
#include <sys/types.h>
#include <sys/mount.h>
#include <sys/prctl.h>
#include <sys/wait.h>
#include <stdlib.h>
#include <unistd.h>
#include <fcntl.h>
#include <stdbool.h>
#include <stdarg.h>
/*
* NOTES about this test:
* - requries libcap-dev to be installed on test system
* - requires securityfs to me mounted at /sys/kernel/security, e.g.:
* mount -n -t securityfs -o nodev,noexec,nosuid securityfs /sys/kernel/security
* - needs CONFIG_SECURITYFS and CONFIG_SAFESETID to be enabled
*/
#ifndef CLONE_NEWUSER
# define CLONE_NEWUSER 0x10000000
#endif
#define ROOT_UGID 0
#define RESTRICTED_PARENT_UGID 1
#define ALLOWED_CHILD1_UGID 2
#define ALLOWED_CHILD2_UGID 3
#define NO_POLICY_UGID 4
#define UGID_POLICY_STRING "1:2\n1:3\n2:2\n3:3\n"
char* add_uid_whitelist_policy_file = "/sys/kernel/security/safesetid/uid_allowlist_policy";
char* add_gid_whitelist_policy_file = "/sys/kernel/security/safesetid/gid_allowlist_policy";
static void die(char *fmt, ...)
{
va_list ap;
va_start(ap, fmt);
vfprintf(stderr, fmt, ap);
va_end(ap);
exit(EXIT_FAILURE);
}
static bool vmaybe_write_file(bool enoent_ok, char *filename, char *fmt, va_list ap)
{
char buf[4096];
int fd;
ssize_t written;
int buf_len;
buf_len = vsnprintf(buf, sizeof(buf), fmt, ap);
if (buf_len < 0) {
printf("vsnprintf failed: %s\n",
strerror(errno));
return false;
}
if (buf_len >= sizeof(buf)) {
printf("vsnprintf output truncated\n");
return false;
}
fd = open(filename, O_WRONLY);
if (fd < 0) {
if ((errno == ENOENT) && enoent_ok)
return true;
return false;
}
written = write(fd, buf, buf_len);
if (written != buf_len) {
if (written >= 0) {
printf("short write to %s\n", filename);
return false;
} else {
printf("write to %s failed: %s\n",
filename, strerror(errno));
return false;
}
}
if (close(fd) != 0) {
printf("close of %s failed: %s\n",
filename, strerror(errno));
return false;
}
return true;
}
static bool write_file(char *filename, char *fmt, ...)
{
va_list ap;
bool ret;
va_start(ap, fmt);
ret = vmaybe_write_file(false, filename, fmt, ap);
va_end(ap);
return ret;
}
static void ensure_user_exists(uid_t uid)
{
struct passwd p;
FILE *fd;
char name_str[10];
if (getpwuid(uid) == NULL) {
memset(&p,0x00,sizeof(p));
fd=fopen("/etc/passwd","a");
if (fd == NULL)
die("couldn't open file\n");
if (fseek(fd, 0, SEEK_END))
die("couldn't fseek\n");
snprintf(name_str, 10, "user %d", uid);
p.pw_name=name_str;
p.pw_uid=uid;
p.pw_gid=uid;
p.pw_gecos="Test account";
p.pw_dir="/dev/null";
p.pw_shell="/bin/false";
int value = putpwent(&p,fd);
if (value != 0)
die("putpwent failed\n");
if (fclose(fd))
die("fclose failed\n");
}
}
static void ensure_group_exists(gid_t gid)
{
struct group g;
FILE *fd;
char name_str[10];
if (getgrgid(gid) == NULL) {
memset(&g,0x00,sizeof(g));
fd=fopen("/etc/group","a");
if (fd == NULL)
die("couldn't open group file\n");
if (fseek(fd, 0, SEEK_END))
die("couldn't fseek group file\n");
snprintf(name_str, 10, "group %d", gid);
g.gr_name=name_str;
g.gr_gid=gid;
g.gr_passwd=NULL;
g.gr_mem=NULL;
int value = putgrent(&g,fd);
if (value != 0)
die("putgrent failed\n");
if (fclose(fd))
die("fclose failed\n");
}
}
static void ensure_securityfs_mounted(void)
{
int fd = open(add_uid_whitelist_policy_file, O_WRONLY);
if (fd < 0) {
if (errno == ENOENT) {
// Need to mount securityfs
if (mount("securityfs", "/sys/kernel/security",
"securityfs", 0, NULL) < 0)
die("mounting securityfs failed\n");
} else {
die("couldn't find securityfs for unknown reason\n");
}
} else {
if (close(fd) != 0) {
die("close of %s failed: %s\n",
add_uid_whitelist_policy_file, strerror(errno));
}
}
}
static void write_uid_policies()
{
static char *policy_str = UGID_POLICY_STRING;
ssize_t written;
int fd;
fd = open(add_uid_whitelist_policy_file, O_WRONLY);
if (fd < 0)
die("can't open add_uid_whitelist_policy file\n");
written = write(fd, policy_str, strlen(policy_str));
if (written != strlen(policy_str)) {
if (written >= 0) {
die("short write to %s\n", add_uid_whitelist_policy_file);
} else {
die("write to %s failed: %s\n",
add_uid_whitelist_policy_file, strerror(errno));
}
}
if (close(fd) != 0) {
die("close of %s failed: %s\n",
add_uid_whitelist_policy_file, strerror(errno));
}
}
static void write_gid_policies()
{
static char *policy_str = UGID_POLICY_STRING;
ssize_t written;
int fd;
fd = open(add_gid_whitelist_policy_file, O_WRONLY);
if (fd < 0)
die("can't open add_gid_whitelist_policy file\n");
written = write(fd, policy_str, strlen(policy_str));
if (written != strlen(policy_str)) {
if (written >= 0) {
die("short write to %s\n", add_gid_whitelist_policy_file);
} else {
die("write to %s failed: %s\n",
add_gid_whitelist_policy_file, strerror(errno));
}
}
if (close(fd) != 0) {
die("close of %s failed: %s\n",
add_gid_whitelist_policy_file, strerror(errno));
}
}
static bool test_userns(bool expect_success)
{
uid_t uid;
char map_file_name[32];
size_t sz = sizeof(map_file_name);
pid_t cpid;
bool success;
uid = getuid();
int clone_flags = CLONE_NEWUSER;
cpid = syscall(SYS_clone, clone_flags, NULL);
if (cpid == -1) {
printf("clone failed");
return false;
}
if (cpid == 0) { /* Code executed by child */
// Give parent 1 second to write map file
sleep(1);
exit(EXIT_SUCCESS);
} else { /* Code executed by parent */
if(snprintf(map_file_name, sz, "/proc/%d/uid_map", cpid) < 0) {
printf("preparing file name string failed");
return false;
}
success = write_file(map_file_name, "0 %d 1", uid);
return success == expect_success;
}
printf("should not reach here");
return false;
}
static void test_setuid(uid_t child_uid, bool expect_success)
{
pid_t cpid, w;
int wstatus;
cpid = fork();
if (cpid == -1) {
die("fork\n");
}
if (cpid == 0) { /* Code executed by child */
if (setuid(child_uid) < 0)
exit(EXIT_FAILURE);
if (getuid() == child_uid)
exit(EXIT_SUCCESS);
else
exit(EXIT_FAILURE);
} else { /* Code executed by parent */
do {
w = waitpid(cpid, &wstatus, WUNTRACED | WCONTINUED);
if (w == -1) {
die("waitpid\n");
}
if (WIFEXITED(wstatus)) {
if (WEXITSTATUS(wstatus) == EXIT_SUCCESS) {
if (expect_success) {
return;
} else {
die("unexpected success\n");
}
} else {
if (expect_success) {
die("unexpected failure\n");
} else {
return;
}
}
} else if (WIFSIGNALED(wstatus)) {
if (WTERMSIG(wstatus) == 9) {
if (expect_success)
die("killed unexpectedly\n");
else
return;
} else {
die("unexpected signal: %d\n", wstatus);
}
} else {
die("unexpected status: %d\n", wstatus);
}
} while (!WIFEXITED(wstatus) && !WIFSIGNALED(wstatus));
}
die("should not reach here\n");
}
static void test_setgid(gid_t child_gid, bool expect_success)
{
pid_t cpid, w;
int wstatus;
cpid = fork();
if (cpid == -1) {
die("fork\n");
}
if (cpid == 0) { /* Code executed by child */
if (setgid(child_gid) < 0)
exit(EXIT_FAILURE);
if (getgid() == child_gid)
exit(EXIT_SUCCESS);
else
exit(EXIT_FAILURE);
} else { /* Code executed by parent */
do {
w = waitpid(cpid, &wstatus, WUNTRACED | WCONTINUED);
if (w == -1) {
die("waitpid\n");
}
if (WIFEXITED(wstatus)) {
if (WEXITSTATUS(wstatus) == EXIT_SUCCESS) {
if (expect_success) {
return;
} else {
die("unexpected success\n");
}
} else {
if (expect_success) {
die("unexpected failure\n");
} else {
return;
}
}
} else if (WIFSIGNALED(wstatus)) {
if (WTERMSIG(wstatus) == 9) {
if (expect_success)
die("killed unexpectedly\n");
else
return;
} else {
die("unexpected signal: %d\n", wstatus);
}
} else {
die("unexpected status: %d\n", wstatus);
}
} while (!WIFEXITED(wstatus) && !WIFSIGNALED(wstatus));
}
die("should not reach here\n");
}
static void test_setgroups(gid_t* child_groups, size_t len, bool expect_success)
{
pid_t cpid, w;
int wstatus;
gid_t groupset[len];
int i, j;
cpid = fork();
if (cpid == -1) {
die("fork\n");
}
if (cpid == 0) { /* Code executed by child */
if (setgroups(len, child_groups) != 0)
exit(EXIT_FAILURE);
if (getgroups(len, groupset) != len)
exit(EXIT_FAILURE);
for (i = 0; i < len; i++) {
for (j = 0; j < len; j++) {
if (child_groups[i] == groupset[j])
break;
if (j == len - 1)
exit(EXIT_FAILURE);
}
}
exit(EXIT_SUCCESS);
} else { /* Code executed by parent */
do {
w = waitpid(cpid, &wstatus, WUNTRACED | WCONTINUED);
if (w == -1) {
die("waitpid\n");
}
if (WIFEXITED(wstatus)) {
if (WEXITSTATUS(wstatus) == EXIT_SUCCESS) {
if (expect_success) {
return;
} else {
die("unexpected success\n");
}
} else {
if (expect_success) {
die("unexpected failure\n");
} else {
return;
}
}
} else if (WIFSIGNALED(wstatus)) {
if (WTERMSIG(wstatus) == 9) {
if (expect_success)
die("killed unexpectedly\n");
else
return;
} else {
die("unexpected signal: %d\n", wstatus);
}
} else {
die("unexpected status: %d\n", wstatus);
}
} while (!WIFEXITED(wstatus) && !WIFSIGNALED(wstatus));
}
die("should not reach here\n");
}
static void ensure_users_exist(void)
{
ensure_user_exists(ROOT_UGID);
ensure_user_exists(RESTRICTED_PARENT_UGID);
ensure_user_exists(ALLOWED_CHILD1_UGID);
ensure_user_exists(ALLOWED_CHILD2_UGID);
ensure_user_exists(NO_POLICY_UGID);
}
static void ensure_groups_exist(void)
{
ensure_group_exists(ROOT_UGID);
ensure_group_exists(RESTRICTED_PARENT_UGID);
ensure_group_exists(ALLOWED_CHILD1_UGID);
ensure_group_exists(ALLOWED_CHILD2_UGID);
ensure_group_exists(NO_POLICY_UGID);
}
static void drop_caps(bool setid_retained)
{
cap_value_t cap_values[] = {CAP_SETUID, CAP_SETGID};
cap_t caps;
caps = cap_get_proc();
if (setid_retained)
cap_set_flag(caps, CAP_EFFECTIVE, 2, cap_values, CAP_SET);
else
cap_clear(caps);
cap_set_proc(caps);
cap_free(caps);
}
int main(int argc, char **argv)
{
ensure_groups_exist();
ensure_users_exist();
ensure_securityfs_mounted();
write_uid_policies();
write_gid_policies();
if (prctl(PR_SET_KEEPCAPS, 1L))
die("Error with set keepcaps\n");
// First test to make sure we can write userns mappings from a non-root
// user that doesn't have any restrictions (as long as it has
// CAP_SETUID);
if (setgid(NO_POLICY_UGID) < 0)
die("Error with set gid(%d)\n", NO_POLICY_UGID);
if (setuid(NO_POLICY_UGID) < 0)
die("Error with set uid(%d)\n", NO_POLICY_UGID);
// Take away all but setid caps
drop_caps(true);
// Need PR_SET_DUMPABLE flag set so we can write /proc/[pid]/uid_map
// from non-root parent process.
if (prctl(PR_SET_DUMPABLE, 1, 0, 0, 0))
die("Error with set dumpable\n");
if (!test_userns(true)) {
die("test_userns failed when it should work\n");
}
// Now switch to a user/group with restrictions
if (setgid(RESTRICTED_PARENT_UGID) < 0)
die("Error with set gid(%d)\n", RESTRICTED_PARENT_UGID);
if (setuid(RESTRICTED_PARENT_UGID) < 0)
die("Error with set uid(%d)\n", RESTRICTED_PARENT_UGID);
test_setuid(ROOT_UGID, false);
test_setuid(ALLOWED_CHILD1_UGID, true);
test_setuid(ALLOWED_CHILD2_UGID, true);
test_setuid(NO_POLICY_UGID, false);
test_setgid(ROOT_UGID, false);
test_setgid(ALLOWED_CHILD1_UGID, true);
test_setgid(ALLOWED_CHILD2_UGID, true);
test_setgid(NO_POLICY_UGID, false);
gid_t allowed_supp_groups[2] = {ALLOWED_CHILD1_UGID, ALLOWED_CHILD2_UGID};
gid_t disallowed_supp_groups[2] = {ROOT_UGID, NO_POLICY_UGID};
test_setgroups(allowed_supp_groups, 2, true);
test_setgroups(disallowed_supp_groups, 2, false);
if (!test_userns(false)) {
die("test_userns worked when it should fail\n");
}
// Now take away all caps
drop_caps(false);
test_setuid(2, false);
test_setuid(3, false);
test_setuid(4, false);
test_setgid(2, false);
test_setgid(3, false);
test_setgid(4, false);
// NOTE: this test doesn't clean up users that were created in
// /etc/passwd or flush policies that were added to the LSM.
printf("test successful!\n");
return EXIT_SUCCESS;
}
| linux-master | tools/testing/selftests/safesetid/safesetid-test.c |
// SPDX-License-Identifier: GPL-2.0-only
/*
* Exercise /dev/mem mmap cases that have been troublesome in the past
*
* (c) Copyright 2007 Hewlett-Packard Development Company, L.P.
* Bjorn Helgaas <[email protected]>
*/
#include <stdlib.h>
#include <stdio.h>
#include <sys/types.h>
#include <dirent.h>
#include <fcntl.h>
#include <fnmatch.h>
#include <string.h>
#include <sys/ioctl.h>
#include <sys/mman.h>
#include <sys/stat.h>
#include <unistd.h>
#include <linux/pci.h>
int sum;
static int map_mem(char *path, off_t offset, size_t length, int touch)
{
int fd, rc;
void *addr;
int *c;
fd = open(path, O_RDWR);
if (fd == -1) {
perror(path);
return -1;
}
if (fnmatch("/proc/bus/pci/*", path, 0) == 0) {
rc = ioctl(fd, PCIIOC_MMAP_IS_MEM);
if (rc == -1)
perror("PCIIOC_MMAP_IS_MEM ioctl");
}
addr = mmap(NULL, length, PROT_READ|PROT_WRITE, MAP_SHARED, fd, offset);
if (addr == MAP_FAILED)
return 1;
if (touch) {
c = (int *) addr;
while (c < (int *) (addr + length))
sum += *c++;
}
rc = munmap(addr, length);
if (rc == -1) {
perror("munmap");
return -1;
}
close(fd);
return 0;
}
static int scan_tree(char *path, char *file, off_t offset, size_t length, int touch)
{
struct dirent **namelist;
char *name, *path2;
int i, n, r, rc = 0, result = 0;
struct stat buf;
n = scandir(path, &namelist, 0, alphasort);
if (n < 0) {
perror("scandir");
return -1;
}
for (i = 0; i < n; i++) {
name = namelist[i]->d_name;
if (fnmatch(".", name, 0) == 0)
goto skip;
if (fnmatch("..", name, 0) == 0)
goto skip;
path2 = malloc(strlen(path) + strlen(name) + 3);
strcpy(path2, path);
strcat(path2, "/");
strcat(path2, name);
if (fnmatch(file, name, 0) == 0) {
rc = map_mem(path2, offset, length, touch);
if (rc == 0)
fprintf(stderr, "PASS: %s 0x%lx-0x%lx is %s\n", path2, offset, offset + length, touch ? "readable" : "mappable");
else if (rc > 0)
fprintf(stderr, "PASS: %s 0x%lx-0x%lx not mappable\n", path2, offset, offset + length);
else {
fprintf(stderr, "FAIL: %s 0x%lx-0x%lx not accessible\n", path2, offset, offset + length);
return rc;
}
} else {
r = lstat(path2, &buf);
if (r == 0 && S_ISDIR(buf.st_mode)) {
rc = scan_tree(path2, file, offset, length, touch);
if (rc < 0)
return rc;
}
}
result |= rc;
free(path2);
skip:
free(namelist[i]);
}
free(namelist);
return result;
}
char buf[1024];
static int read_rom(char *path)
{
int fd, rc;
size_t size = 0;
fd = open(path, O_RDWR);
if (fd == -1) {
perror(path);
return -1;
}
rc = write(fd, "1", 2);
if (rc <= 0) {
close(fd);
perror("write");
return -1;
}
do {
rc = read(fd, buf, sizeof(buf));
if (rc > 0)
size += rc;
} while (rc > 0);
close(fd);
return size;
}
static int scan_rom(char *path, char *file)
{
struct dirent **namelist;
char *name, *path2;
int i, n, r, rc = 0, result = 0;
struct stat buf;
n = scandir(path, &namelist, 0, alphasort);
if (n < 0) {
perror("scandir");
return -1;
}
for (i = 0; i < n; i++) {
name = namelist[i]->d_name;
if (fnmatch(".", name, 0) == 0)
goto skip;
if (fnmatch("..", name, 0) == 0)
goto skip;
path2 = malloc(strlen(path) + strlen(name) + 3);
strcpy(path2, path);
strcat(path2, "/");
strcat(path2, name);
if (fnmatch(file, name, 0) == 0) {
rc = read_rom(path2);
/*
* It's OK if the ROM is unreadable. Maybe there
* is no ROM, or some other error occurred. The
* important thing is that no MCA happened.
*/
if (rc > 0)
fprintf(stderr, "PASS: %s read %d bytes\n", path2, rc);
else {
fprintf(stderr, "PASS: %s not readable\n", path2);
return rc;
}
} else {
r = lstat(path2, &buf);
if (r == 0 && S_ISDIR(buf.st_mode)) {
rc = scan_rom(path2, file);
if (rc < 0)
return rc;
}
}
result |= rc;
free(path2);
skip:
free(namelist[i]);
}
free(namelist);
return result;
}
int main(void)
{
int rc;
if (map_mem("/dev/mem", 0, 0xA0000, 1) == 0)
fprintf(stderr, "PASS: /dev/mem 0x0-0xa0000 is readable\n");
else
fprintf(stderr, "FAIL: /dev/mem 0x0-0xa0000 not accessible\n");
/*
* It's not safe to blindly read the VGA frame buffer. If you know
* how to poke the card the right way, it should respond, but it's
* not safe in general. Many machines, e.g., Intel chipsets, cover
* up a non-responding card by just returning -1, but others will
* report the failure as a machine check.
*/
if (map_mem("/dev/mem", 0xA0000, 0x20000, 0) == 0)
fprintf(stderr, "PASS: /dev/mem 0xa0000-0xc0000 is mappable\n");
else
fprintf(stderr, "FAIL: /dev/mem 0xa0000-0xc0000 not accessible\n");
if (map_mem("/dev/mem", 0xC0000, 0x40000, 1) == 0)
fprintf(stderr, "PASS: /dev/mem 0xc0000-0x100000 is readable\n");
else
fprintf(stderr, "FAIL: /dev/mem 0xc0000-0x100000 not accessible\n");
/*
* Often you can map all the individual pieces above (0-0xA0000,
* 0xA0000-0xC0000, and 0xC0000-0x100000), but can't map the whole
* thing at once. This is because the individual pieces use different
* attributes, and there's no single attribute supported over the
* whole region.
*/
rc = map_mem("/dev/mem", 0, 1024*1024, 0);
if (rc == 0)
fprintf(stderr, "PASS: /dev/mem 0x0-0x100000 is mappable\n");
else if (rc > 0)
fprintf(stderr, "PASS: /dev/mem 0x0-0x100000 not mappable\n");
else
fprintf(stderr, "FAIL: /dev/mem 0x0-0x100000 not accessible\n");
scan_tree("/sys/class/pci_bus", "legacy_mem", 0, 0xA0000, 1);
scan_tree("/sys/class/pci_bus", "legacy_mem", 0xA0000, 0x20000, 0);
scan_tree("/sys/class/pci_bus", "legacy_mem", 0xC0000, 0x40000, 1);
scan_tree("/sys/class/pci_bus", "legacy_mem", 0, 1024*1024, 0);
scan_rom("/sys/devices", "rom");
scan_tree("/proc/bus/pci", "??.?", 0, 0xA0000, 1);
scan_tree("/proc/bus/pci", "??.?", 0xA0000, 0x20000, 0);
scan_tree("/proc/bus/pci", "??.?", 0xC0000, 0x40000, 1);
scan_tree("/proc/bus/pci", "??.?", 0, 1024*1024, 0);
return rc;
}
| linux-master | tools/testing/selftests/ia64/aliasing-test.c |
// SPDX-License-Identifier: GPL-2.0
/*
* Stas Sergeev <[email protected]>
*
* test sigaltstack(SS_ONSTACK | SS_AUTODISARM)
* If that succeeds, then swapcontext() can be used inside sighandler safely.
*
*/
#define _GNU_SOURCE
#include <signal.h>
#include <stdio.h>
#include <stdlib.h>
#include <sys/mman.h>
#include <ucontext.h>
#include <alloca.h>
#include <string.h>
#include <assert.h>
#include <errno.h>
#include <sys/auxv.h>
#include "../kselftest.h"
#include "current_stack_pointer.h"
#ifndef SS_AUTODISARM
#define SS_AUTODISARM (1U << 31)
#endif
#ifndef AT_MINSIGSTKSZ
#define AT_MINSIGSTKSZ 51
#endif
static unsigned int stack_size;
static void *sstack, *ustack;
static ucontext_t uc, sc;
static const char *msg = "[OK]\tStack preserved";
static const char *msg2 = "[FAIL]\tStack corrupted";
struct stk_data {
char msg[128];
int flag;
};
void my_usr1(int sig, siginfo_t *si, void *u)
{
char *aa;
int err;
stack_t stk;
struct stk_data *p;
if (sp < (unsigned long)sstack ||
sp >= (unsigned long)sstack + stack_size) {
ksft_exit_fail_msg("SP is not on sigaltstack\n");
}
/* put some data on stack. other sighandler will try to overwrite it */
aa = alloca(1024);
assert(aa);
p = (struct stk_data *)(aa + 512);
strcpy(p->msg, msg);
p->flag = 1;
ksft_print_msg("[RUN]\tsignal USR1\n");
err = sigaltstack(NULL, &stk);
if (err) {
ksft_exit_fail_msg("sigaltstack() - %s\n", strerror(errno));
exit(EXIT_FAILURE);
}
if (stk.ss_flags != SS_DISABLE)
ksft_test_result_fail("tss_flags=%x, should be SS_DISABLE\n",
stk.ss_flags);
else
ksft_test_result_pass(
"sigaltstack is disabled in sighandler\n");
swapcontext(&sc, &uc);
ksft_print_msg("%s\n", p->msg);
if (!p->flag) {
ksft_exit_fail_msg("[RUN]\tAborting\n");
exit(EXIT_FAILURE);
}
}
void my_usr2(int sig, siginfo_t *si, void *u)
{
char *aa;
struct stk_data *p;
ksft_print_msg("[RUN]\tsignal USR2\n");
aa = alloca(1024);
/* dont run valgrind on this */
/* try to find the data stored by previous sighandler */
p = memmem(aa, 1024, msg, strlen(msg));
if (p) {
ksft_test_result_fail("sigaltstack re-used\n");
/* corrupt the data */
strcpy(p->msg, msg2);
/* tell other sighandler that his data is corrupted */
p->flag = 0;
}
}
static void switch_fn(void)
{
ksft_print_msg("[RUN]\tswitched to user ctx\n");
raise(SIGUSR2);
setcontext(&sc);
}
int main(void)
{
struct sigaction act;
stack_t stk;
int err;
/* Make sure more than the required minimum. */
stack_size = getauxval(AT_MINSIGSTKSZ) + SIGSTKSZ;
ksft_print_msg("[NOTE]\tthe stack size is %lu\n", stack_size);
ksft_print_header();
ksft_set_plan(3);
sigemptyset(&act.sa_mask);
act.sa_flags = SA_ONSTACK | SA_SIGINFO;
act.sa_sigaction = my_usr1;
sigaction(SIGUSR1, &act, NULL);
act.sa_sigaction = my_usr2;
sigaction(SIGUSR2, &act, NULL);
sstack = mmap(NULL, stack_size, PROT_READ | PROT_WRITE,
MAP_PRIVATE | MAP_ANONYMOUS | MAP_STACK, -1, 0);
if (sstack == MAP_FAILED) {
ksft_exit_fail_msg("mmap() - %s\n", strerror(errno));
return EXIT_FAILURE;
}
err = sigaltstack(NULL, &stk);
if (err) {
ksft_exit_fail_msg("sigaltstack() - %s\n", strerror(errno));
exit(EXIT_FAILURE);
}
if (stk.ss_flags == SS_DISABLE) {
ksft_test_result_pass(
"Initial sigaltstack state was SS_DISABLE\n");
} else {
ksft_exit_fail_msg("Initial sigaltstack state was %x; "
"should have been SS_DISABLE\n", stk.ss_flags);
return EXIT_FAILURE;
}
stk.ss_sp = sstack;
stk.ss_size = stack_size;
stk.ss_flags = SS_ONSTACK | SS_AUTODISARM;
err = sigaltstack(&stk, NULL);
if (err) {
if (errno == EINVAL) {
ksft_test_result_skip(
"[NOTE]\tThe running kernel doesn't support SS_AUTODISARM\n");
/*
* If test cases for the !SS_AUTODISARM variant were
* added, we could still run them. We don't have any
* test cases like that yet, so just exit and report
* success.
*/
return 0;
} else {
ksft_exit_fail_msg(
"sigaltstack(SS_ONSTACK | SS_AUTODISARM) %s\n",
strerror(errno));
return EXIT_FAILURE;
}
}
ustack = mmap(NULL, stack_size, PROT_READ | PROT_WRITE,
MAP_PRIVATE | MAP_ANONYMOUS | MAP_STACK, -1, 0);
if (ustack == MAP_FAILED) {
ksft_exit_fail_msg("mmap() - %s\n", strerror(errno));
return EXIT_FAILURE;
}
getcontext(&uc);
uc.uc_link = NULL;
uc.uc_stack.ss_sp = ustack;
uc.uc_stack.ss_size = stack_size;
makecontext(&uc, switch_fn, 0);
raise(SIGUSR1);
err = sigaltstack(NULL, &stk);
if (err) {
ksft_exit_fail_msg("sigaltstack() - %s\n", strerror(errno));
exit(EXIT_FAILURE);
}
if (stk.ss_flags != SS_AUTODISARM) {
ksft_exit_fail_msg("ss_flags=%x, should be SS_AUTODISARM\n",
stk.ss_flags);
exit(EXIT_FAILURE);
}
ksft_test_result_pass(
"sigaltstack is still SS_AUTODISARM after signal\n");
ksft_exit_pass();
return 0;
}
| linux-master | tools/testing/selftests/sigaltstack/sas.c |
// SPDX-License-Identifier: GPL-2.0
#define _GNU_SOURCE
#include <sched.h>
#include <stdio.h>
#include <errno.h>
#include <string.h>
#include <sys/stat.h>
#include <sys/types.h>
#include <sys/mount.h>
#include <sys/wait.h>
#include <stdlib.h>
#include <unistd.h>
#include <fcntl.h>
#include <stdbool.h>
#include <stdarg.h>
#include <sys/syscall.h>
#include "../kselftest_harness.h"
#ifndef CLONE_NEWNS
#define CLONE_NEWNS 0x00020000
#endif
#ifndef CLONE_NEWUSER
#define CLONE_NEWUSER 0x10000000
#endif
#ifndef MS_SHARED
#define MS_SHARED (1 << 20)
#endif
#ifndef MS_PRIVATE
#define MS_PRIVATE (1<<18)
#endif
#ifndef MOVE_MOUNT_SET_GROUP
#define MOVE_MOUNT_SET_GROUP 0x00000100
#endif
#ifndef MOVE_MOUNT_F_EMPTY_PATH
#define MOVE_MOUNT_F_EMPTY_PATH 0x00000004
#endif
#ifndef MOVE_MOUNT_T_EMPTY_PATH
#define MOVE_MOUNT_T_EMPTY_PATH 0x00000040
#endif
static ssize_t write_nointr(int fd, const void *buf, size_t count)
{
ssize_t ret;
do {
ret = write(fd, buf, count);
} while (ret < 0 && errno == EINTR);
return ret;
}
static int write_file(const char *path, const void *buf, size_t count)
{
int fd;
ssize_t ret;
fd = open(path, O_WRONLY | O_CLOEXEC | O_NOCTTY | O_NOFOLLOW);
if (fd < 0)
return -1;
ret = write_nointr(fd, buf, count);
close(fd);
if (ret < 0 || (size_t)ret != count)
return -1;
return 0;
}
static int create_and_enter_userns(void)
{
uid_t uid;
gid_t gid;
char map[100];
uid = getuid();
gid = getgid();
if (unshare(CLONE_NEWUSER))
return -1;
if (write_file("/proc/self/setgroups", "deny", sizeof("deny") - 1) &&
errno != ENOENT)
return -1;
snprintf(map, sizeof(map), "0 %d 1", uid);
if (write_file("/proc/self/uid_map", map, strlen(map)))
return -1;
snprintf(map, sizeof(map), "0 %d 1", gid);
if (write_file("/proc/self/gid_map", map, strlen(map)))
return -1;
if (setgid(0))
return -1;
if (setuid(0))
return -1;
return 0;
}
static int prepare_unpriv_mountns(void)
{
if (create_and_enter_userns())
return -1;
if (unshare(CLONE_NEWNS))
return -1;
if (mount(NULL, "/", NULL, MS_REC | MS_PRIVATE, 0))
return -1;
return 0;
}
static char *get_field(char *src, int nfields)
{
int i;
char *p = src;
for (i = 0; i < nfields; i++) {
while (*p && *p != ' ' && *p != '\t')
p++;
if (!*p)
break;
p++;
}
return p;
}
static void null_endofword(char *word)
{
while (*word && *word != ' ' && *word != '\t')
word++;
*word = '\0';
}
static bool is_shared_mount(const char *path)
{
size_t len = 0;
char *line = NULL;
FILE *f = NULL;
f = fopen("/proc/self/mountinfo", "re");
if (!f)
return false;
while (getline(&line, &len, f) != -1) {
char *opts, *target;
target = get_field(line, 4);
if (!target)
continue;
opts = get_field(target, 2);
if (!opts)
continue;
null_endofword(target);
if (strcmp(target, path) != 0)
continue;
null_endofword(opts);
if (strstr(opts, "shared:"))
return true;
}
free(line);
fclose(f);
return false;
}
/* Attempt to de-conflict with the selftests tree. */
#ifndef SKIP
#define SKIP(s, ...) XFAIL(s, ##__VA_ARGS__)
#endif
#define SET_GROUP_FROM "/tmp/move_mount_set_group_supported_from"
#define SET_GROUP_TO "/tmp/move_mount_set_group_supported_to"
static bool move_mount_set_group_supported(void)
{
int ret;
if (mount("testing", "/tmp", "tmpfs", MS_NOATIME | MS_NODEV,
"size=100000,mode=700"))
return -1;
if (mount(NULL, "/tmp", NULL, MS_PRIVATE, 0))
return -1;
if (mkdir(SET_GROUP_FROM, 0777))
return -1;
if (mkdir(SET_GROUP_TO, 0777))
return -1;
if (mount("testing", SET_GROUP_FROM, "tmpfs", MS_NOATIME | MS_NODEV,
"size=100000,mode=700"))
return -1;
if (mount(SET_GROUP_FROM, SET_GROUP_TO, NULL, MS_BIND, NULL))
return -1;
if (mount(NULL, SET_GROUP_FROM, NULL, MS_SHARED, 0))
return -1;
ret = syscall(SYS_move_mount, AT_FDCWD, SET_GROUP_FROM,
AT_FDCWD, SET_GROUP_TO, MOVE_MOUNT_SET_GROUP);
umount2("/tmp", MNT_DETACH);
return ret >= 0;
}
FIXTURE(move_mount_set_group) {
};
#define SET_GROUP_A "/tmp/A"
FIXTURE_SETUP(move_mount_set_group)
{
bool ret;
ASSERT_EQ(prepare_unpriv_mountns(), 0);
ret = move_mount_set_group_supported();
ASSERT_GE(ret, 0);
if (!ret)
SKIP(return, "move_mount(MOVE_MOUNT_SET_GROUP) is not supported");
umount2("/tmp", MNT_DETACH);
ASSERT_EQ(mount("testing", "/tmp", "tmpfs", MS_NOATIME | MS_NODEV,
"size=100000,mode=700"), 0);
ASSERT_EQ(mkdir(SET_GROUP_A, 0777), 0);
ASSERT_EQ(mount("testing", SET_GROUP_A, "tmpfs", MS_NOATIME | MS_NODEV,
"size=100000,mode=700"), 0);
}
FIXTURE_TEARDOWN(move_mount_set_group)
{
bool ret;
ret = move_mount_set_group_supported();
ASSERT_GE(ret, 0);
if (!ret)
SKIP(return, "move_mount(MOVE_MOUNT_SET_GROUP) is not supported");
umount2("/tmp", MNT_DETACH);
}
#define __STACK_SIZE (8 * 1024 * 1024)
static pid_t do_clone(int (*fn)(void *), void *arg, int flags)
{
void *stack;
stack = malloc(__STACK_SIZE);
if (!stack)
return -ENOMEM;
#ifdef __ia64__
return __clone2(fn, stack, __STACK_SIZE, flags | SIGCHLD, arg, NULL);
#else
return clone(fn, stack + __STACK_SIZE, flags | SIGCHLD, arg, NULL);
#endif
}
static int wait_for_pid(pid_t pid)
{
int status, ret;
again:
ret = waitpid(pid, &status, 0);
if (ret == -1) {
if (errno == EINTR)
goto again;
return -1;
}
if (!WIFEXITED(status))
return -1;
return WEXITSTATUS(status);
}
struct child_args {
int unsfd;
int mntnsfd;
bool shared;
int mntfd;
};
static int get_nestedns_mount_cb(void *data)
{
struct child_args *ca = (struct child_args *)data;
int ret;
ret = prepare_unpriv_mountns();
if (ret)
return 1;
if (ca->shared) {
ret = mount(NULL, SET_GROUP_A, NULL, MS_SHARED, 0);
if (ret)
return 1;
}
ret = open("/proc/self/ns/user", O_RDONLY);
if (ret < 0)
return 1;
ca->unsfd = ret;
ret = open("/proc/self/ns/mnt", O_RDONLY);
if (ret < 0)
return 1;
ca->mntnsfd = ret;
ret = open(SET_GROUP_A, O_RDONLY);
if (ret < 0)
return 1;
ca->mntfd = ret;
return 0;
}
TEST_F(move_mount_set_group, complex_sharing_copying)
{
struct child_args ca_from = {
.shared = true,
};
struct child_args ca_to = {
.shared = false,
};
pid_t pid;
bool ret;
ret = move_mount_set_group_supported();
ASSERT_GE(ret, 0);
if (!ret)
SKIP(return, "move_mount(MOVE_MOUNT_SET_GROUP) is not supported");
pid = do_clone(get_nestedns_mount_cb, (void *)&ca_from, CLONE_VFORK |
CLONE_VM | CLONE_FILES); ASSERT_GT(pid, 0);
ASSERT_EQ(wait_for_pid(pid), 0);
pid = do_clone(get_nestedns_mount_cb, (void *)&ca_to, CLONE_VFORK |
CLONE_VM | CLONE_FILES); ASSERT_GT(pid, 0);
ASSERT_EQ(wait_for_pid(pid), 0);
ASSERT_EQ(syscall(SYS_move_mount, ca_from.mntfd, "",
ca_to.mntfd, "", MOVE_MOUNT_SET_GROUP
| MOVE_MOUNT_F_EMPTY_PATH | MOVE_MOUNT_T_EMPTY_PATH),
0);
ASSERT_EQ(setns(ca_to.mntnsfd, CLONE_NEWNS), 0);
ASSERT_EQ(is_shared_mount(SET_GROUP_A), 1);
}
TEST_HARNESS_MAIN
| linux-master | tools/testing/selftests/move_mount_set_group/move_mount_set_group_test.c |
// SPDX-License-Identifier: GPL-2.0
#include <errno.h>
#include <stdbool.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/stat.h>
#include <unistd.h>
#include <linux/limits.h>
#include "../kselftest.h"
#define MIN_TTY_PATH_LEN 8
static bool tty_valid(char *tty)
{
if (strlen(tty) < MIN_TTY_PATH_LEN)
return false;
if (strncmp(tty, "/dev/tty", MIN_TTY_PATH_LEN) == 0 ||
strncmp(tty, "/dev/pts", MIN_TTY_PATH_LEN) == 0)
return true;
return false;
}
static int write_dev_tty(void)
{
FILE *f;
int r = 0;
f = fopen("/dev/tty", "r+");
if (!f)
return -errno;
r = fprintf(f, "hello, world!\n");
if (r != strlen("hello, world!\n"))
r = -EIO;
fclose(f);
return r;
}
int main(int argc, char **argv)
{
int r;
char tty[PATH_MAX] = {};
struct stat st1, st2;
ksft_print_header();
ksft_set_plan(1);
r = readlink("/proc/self/fd/0", tty, PATH_MAX);
if (r < 0)
ksft_exit_fail_msg("readlink on /proc/self/fd/0 failed: %m\n");
if (!tty_valid(tty))
ksft_exit_skip("invalid tty path '%s'\n", tty);
r = stat(tty, &st1);
if (r < 0)
ksft_exit_fail_msg("stat failed on tty path '%s': %m\n", tty);
/* We need to wait at least 8 seconds in order to observe timestamp change */
/* https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=fbf47635315ab308c9b58a1ea0906e711a9228de */
sleep(10);
r = write_dev_tty();
if (r < 0)
ksft_exit_fail_msg("failed to write to /dev/tty: %s\n",
strerror(-r));
r = stat(tty, &st2);
if (r < 0)
ksft_exit_fail_msg("stat failed on tty path '%s': %m\n", tty);
/* We wrote to the terminal so timestamps should have been updated */
if (st1.st_atim.tv_sec == st2.st_atim.tv_sec &&
st1.st_mtim.tv_sec == st2.st_mtim.tv_sec) {
ksft_test_result_fail("tty timestamps not updated\n");
ksft_exit_fail();
}
ksft_test_result_pass(
"timestamps of terminal '%s' updated after write to /dev/tty\n", tty);
return EXIT_SUCCESS;
}
| linux-master | tools/testing/selftests/tty/tty_tstamp_update.c |
// SPDX-License-Identifier: GPL-2.0
#include <math.h>
#include <unistd.h>
#include <stdio.h>
#include <stdlib.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <sys/timeb.h>
#include <sched.h>
#include <errno.h>
int main(int argc, char **argv) {
int cpu, fd;
long long msr;
char msr_file_name[64];
if (argc != 2)
return 1;
errno = 0;
cpu = strtol(argv[1], (char **) NULL, 10);
if (errno)
return 1;
sprintf(msr_file_name, "/dev/cpu/%d/msr", cpu);
fd = open(msr_file_name, O_RDONLY);
if (fd == -1) {
perror("Failed to open");
return 1;
}
pread(fd, &msr, sizeof(msr), 0x199);
printf("msr 0x199: 0x%llx\n", msr);
return 0;
}
| linux-master | tools/testing/selftests/intel_pstate/msr.c |
// SPDX-License-Identifier: GPL-2.0
#include <math.h>
#include <unistd.h>
#include <stdio.h>
#include <stdlib.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <sys/timeb.h>
#include <sched.h>
#include <errno.h>
#include <string.h>
#include <time.h>
#include "../kselftest.h"
#define MSEC_PER_SEC 1000L
#define NSEC_PER_MSEC 1000000L
void usage(char *name) {
printf ("Usage: %s cpunum\n", name);
}
int main(int argc, char **argv) {
unsigned int i, cpu, fd;
char msr_file_name[64];
long long tsc, old_tsc, new_tsc;
long long aperf, old_aperf, new_aperf;
long long mperf, old_mperf, new_mperf;
struct timespec before, after;
long long int start, finish, total;
cpu_set_t cpuset;
if (argc != 2) {
usage(argv[0]);
return 1;
}
errno = 0;
cpu = strtol(argv[1], (char **) NULL, 10);
if (errno) {
usage(argv[0]);
return 1;
}
sprintf(msr_file_name, "/dev/cpu/%d/msr", cpu);
fd = open(msr_file_name, O_RDONLY);
if (fd == -1) {
printf("/dev/cpu/%d/msr: %s\n", cpu, strerror(errno));
return KSFT_SKIP;
}
CPU_ZERO(&cpuset);
CPU_SET(cpu, &cpuset);
if (sched_setaffinity(0, sizeof(cpu_set_t), &cpuset)) {
perror("Failed to set cpu affinity");
return 1;
}
if (clock_gettime(CLOCK_MONOTONIC, &before) < 0) {
perror("clock_gettime");
return 1;
}
pread(fd, &old_tsc, sizeof(old_tsc), 0x10);
pread(fd, &old_aperf, sizeof(old_mperf), 0xe7);
pread(fd, &old_mperf, sizeof(old_aperf), 0xe8);
for (i=0; i<0x8fffffff; i++) {
sqrt(i);
}
if (clock_gettime(CLOCK_MONOTONIC, &after) < 0) {
perror("clock_gettime");
return 1;
}
pread(fd, &new_tsc, sizeof(new_tsc), 0x10);
pread(fd, &new_aperf, sizeof(new_mperf), 0xe7);
pread(fd, &new_mperf, sizeof(new_aperf), 0xe8);
tsc = new_tsc-old_tsc;
aperf = new_aperf-old_aperf;
mperf = new_mperf-old_mperf;
start = before.tv_sec*MSEC_PER_SEC + before.tv_nsec/NSEC_PER_MSEC;
finish = after.tv_sec*MSEC_PER_SEC + after.tv_nsec/NSEC_PER_MSEC;
total = finish - start;
printf("runTime: %4.2f\n", 1.0*total/MSEC_PER_SEC);
printf("freq: %7.0f\n", tsc / (1.0*aperf / (1.0 * mperf)) / total);
return 0;
}
| linux-master | tools/testing/selftests/intel_pstate/aperf.c |
#include <errno.h>
#include <error.h>
#include <getopt.h>
#include <stdbool.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <sys/time.h>
#include <sys/socket.h>
#include <sys/select.h>
#include <sys/ioctl.h>
#include <arpa/inet.h>
#include <net/if.h>
#include <asm/types.h>
#include <linux/net_tstamp.h>
#include <linux/errqueue.h>
#include "../kselftest.h"
struct options {
int so_timestamp;
int so_timestampns;
int so_timestamping;
};
struct tstamps {
bool tstamp;
bool tstampns;
bool swtstamp;
bool hwtstamp;
};
struct socket_type {
char *friendly_name;
int type;
int protocol;
bool enabled;
};
struct test_case {
struct options sockopt;
struct tstamps expected;
bool enabled;
bool warn_on_fail;
};
struct sof_flag {
int mask;
char *name;
};
static struct sof_flag sof_flags[] = {
#define SOF_FLAG(f) { f, #f }
SOF_FLAG(SOF_TIMESTAMPING_SOFTWARE),
SOF_FLAG(SOF_TIMESTAMPING_RX_SOFTWARE),
SOF_FLAG(SOF_TIMESTAMPING_RX_HARDWARE),
};
static struct socket_type socket_types[] = {
{ "ip", SOCK_RAW, IPPROTO_EGP },
{ "udp", SOCK_DGRAM, IPPROTO_UDP },
{ "tcp", SOCK_STREAM, IPPROTO_TCP },
};
static struct test_case test_cases[] = {
{ {}, {} },
{
{ .so_timestamp = 1 },
{ .tstamp = true }
},
{
{ .so_timestampns = 1 },
{ .tstampns = true }
},
{
{ .so_timestamp = 1, .so_timestampns = 1 },
{ .tstampns = true }
},
{
{ .so_timestamping = SOF_TIMESTAMPING_RX_SOFTWARE },
{}
},
{
/* Loopback device does not support hw timestamps. */
{ .so_timestamping = SOF_TIMESTAMPING_RX_HARDWARE },
{}
},
{
{ .so_timestamping = SOF_TIMESTAMPING_SOFTWARE },
.warn_on_fail = true
},
{
{ .so_timestamping = SOF_TIMESTAMPING_RX_SOFTWARE
| SOF_TIMESTAMPING_RX_HARDWARE },
{}
},
{
{ .so_timestamping = SOF_TIMESTAMPING_SOFTWARE
| SOF_TIMESTAMPING_RX_SOFTWARE },
{ .swtstamp = true }
},
{
{ .so_timestamp = 1, .so_timestamping = SOF_TIMESTAMPING_SOFTWARE
| SOF_TIMESTAMPING_RX_SOFTWARE },
{ .tstamp = true, .swtstamp = true }
},
};
static struct option long_options[] = {
{ "list_tests", no_argument, 0, 'l' },
{ "test_num", required_argument, 0, 'n' },
{ "op_size", required_argument, 0, 's' },
{ "tcp", no_argument, 0, 't' },
{ "udp", no_argument, 0, 'u' },
{ "ip", no_argument, 0, 'i' },
{ "strict", no_argument, 0, 'S' },
{ "ipv4", no_argument, 0, '4' },
{ "ipv6", no_argument, 0, '6' },
{ NULL, 0, NULL, 0 },
};
static int next_port = 19999;
static int op_size = 10 * 1024;
void print_test_case(struct test_case *t)
{
int f = 0;
printf("sockopts {");
if (t->sockopt.so_timestamp)
printf(" SO_TIMESTAMP ");
if (t->sockopt.so_timestampns)
printf(" SO_TIMESTAMPNS ");
if (t->sockopt.so_timestamping) {
printf(" SO_TIMESTAMPING: {");
for (f = 0; f < ARRAY_SIZE(sof_flags); f++)
if (t->sockopt.so_timestamping & sof_flags[f].mask)
printf(" %s |", sof_flags[f].name);
printf("}");
}
printf("} expected cmsgs: {");
if (t->expected.tstamp)
printf(" SCM_TIMESTAMP ");
if (t->expected.tstampns)
printf(" SCM_TIMESTAMPNS ");
if (t->expected.swtstamp || t->expected.hwtstamp) {
printf(" SCM_TIMESTAMPING {");
if (t->expected.swtstamp)
printf("0");
if (t->expected.swtstamp && t->expected.hwtstamp)
printf(",");
if (t->expected.hwtstamp)
printf("2");
printf("}");
}
printf("}\n");
}
void do_send(int src)
{
int r;
char *buf = malloc(op_size);
memset(buf, 'z', op_size);
r = write(src, buf, op_size);
if (r < 0)
error(1, errno, "Failed to sendmsg");
free(buf);
}
bool do_recv(int rcv, int read_size, struct tstamps expected)
{
const int CMSG_SIZE = 1024;
struct scm_timestamping *ts;
struct tstamps actual = {};
char cmsg_buf[CMSG_SIZE];
struct iovec recv_iov;
struct cmsghdr *cmsg;
bool failed = false;
struct msghdr hdr;
int flags = 0;
int r;
memset(&hdr, 0, sizeof(hdr));
hdr.msg_iov = &recv_iov;
hdr.msg_iovlen = 1;
recv_iov.iov_base = malloc(read_size);
recv_iov.iov_len = read_size;
hdr.msg_control = cmsg_buf;
hdr.msg_controllen = sizeof(cmsg_buf);
r = recvmsg(rcv, &hdr, flags);
if (r < 0)
error(1, errno, "Failed to recvmsg");
if (r != read_size)
error(1, 0, "Only received %d bytes of payload.", r);
if (hdr.msg_flags & (MSG_TRUNC | MSG_CTRUNC))
error(1, 0, "Message was truncated.");
for (cmsg = CMSG_FIRSTHDR(&hdr); cmsg != NULL;
cmsg = CMSG_NXTHDR(&hdr, cmsg)) {
if (cmsg->cmsg_level != SOL_SOCKET)
error(1, 0, "Unexpected cmsg_level %d",
cmsg->cmsg_level);
switch (cmsg->cmsg_type) {
case SCM_TIMESTAMP:
actual.tstamp = true;
break;
case SCM_TIMESTAMPNS:
actual.tstampns = true;
break;
case SCM_TIMESTAMPING:
ts = (struct scm_timestamping *)CMSG_DATA(cmsg);
actual.swtstamp = !!ts->ts[0].tv_sec;
if (ts->ts[1].tv_sec != 0)
error(0, 0, "ts[1] should not be set.");
actual.hwtstamp = !!ts->ts[2].tv_sec;
break;
default:
error(1, 0, "Unexpected cmsg_type %d", cmsg->cmsg_type);
}
}
#define VALIDATE(field) \
do { \
if (expected.field != actual.field) { \
if (expected.field) \
error(0, 0, "Expected " #field " to be set."); \
else \
error(0, 0, \
"Expected " #field " to not be set."); \
failed = true; \
} \
} while (0)
VALIDATE(tstamp);
VALIDATE(tstampns);
VALIDATE(swtstamp);
VALIDATE(hwtstamp);
#undef VALIDATE
free(recv_iov.iov_base);
return failed;
}
void config_so_flags(int rcv, struct options o)
{
int on = 1;
if (setsockopt(rcv, SOL_SOCKET, SO_REUSEADDR, &on, sizeof(on)) < 0)
error(1, errno, "Failed to enable SO_REUSEADDR");
if (o.so_timestamp &&
setsockopt(rcv, SOL_SOCKET, SO_TIMESTAMP,
&o.so_timestamp, sizeof(o.so_timestamp)) < 0)
error(1, errno, "Failed to enable SO_TIMESTAMP");
if (o.so_timestampns &&
setsockopt(rcv, SOL_SOCKET, SO_TIMESTAMPNS,
&o.so_timestampns, sizeof(o.so_timestampns)) < 0)
error(1, errno, "Failed to enable SO_TIMESTAMPNS");
if (o.so_timestamping &&
setsockopt(rcv, SOL_SOCKET, SO_TIMESTAMPING,
&o.so_timestamping, sizeof(o.so_timestamping)) < 0)
error(1, errno, "Failed to set SO_TIMESTAMPING");
}
bool run_test_case(struct socket_type *s, int test_num, char ip_version,
bool strict)
{
union {
struct sockaddr_in6 addr6;
struct sockaddr_in addr4;
struct sockaddr addr_un;
} addr;
int read_size = op_size;
int src, dst, rcv, port;
socklen_t addr_size;
bool failed = false;
port = (s->type == SOCK_RAW) ? 0 : next_port++;
memset(&addr, 0, sizeof(addr));
if (ip_version == '4') {
addr.addr4.sin_family = AF_INET;
addr.addr4.sin_addr.s_addr = htonl(INADDR_LOOPBACK);
addr.addr4.sin_port = htons(port);
addr_size = sizeof(addr.addr4);
if (s->type == SOCK_RAW)
read_size += 20; /* for IPv4 header */
} else {
addr.addr6.sin6_family = AF_INET6;
addr.addr6.sin6_addr = in6addr_loopback;
addr.addr6.sin6_port = htons(port);
addr_size = sizeof(addr.addr6);
}
printf("Starting testcase %d over ipv%c...\n", test_num, ip_version);
src = socket(addr.addr_un.sa_family, s->type,
s->protocol);
if (src < 0)
error(1, errno, "Failed to open src socket");
dst = socket(addr.addr_un.sa_family, s->type,
s->protocol);
if (dst < 0)
error(1, errno, "Failed to open dst socket");
if (bind(dst, &addr.addr_un, addr_size) < 0)
error(1, errno, "Failed to bind to port %d", port);
if (s->type == SOCK_STREAM && (listen(dst, 1) < 0))
error(1, errno, "Failed to listen");
if (connect(src, &addr.addr_un, addr_size) < 0)
error(1, errno, "Failed to connect");
if (s->type == SOCK_STREAM) {
rcv = accept(dst, NULL, NULL);
if (rcv < 0)
error(1, errno, "Failed to accept");
close(dst);
} else {
rcv = dst;
}
config_so_flags(rcv, test_cases[test_num].sockopt);
usleep(20000); /* setsockopt for SO_TIMESTAMPING is asynchronous */
do_send(src);
failed = do_recv(rcv, read_size, test_cases[test_num].expected);
close(rcv);
close(src);
if (failed) {
printf("FAILURE in testcase %d over ipv%c ", test_num,
ip_version);
print_test_case(&test_cases[test_num]);
if (!strict && test_cases[test_num].warn_on_fail)
failed = false;
}
return failed;
}
int main(int argc, char **argv)
{
bool all_protocols = true;
bool all_tests = true;
bool cfg_ipv4 = false;
bool cfg_ipv6 = false;
bool strict = false;
int arg_index = 0;
int failures = 0;
int s, t, opt;
while ((opt = getopt_long(argc, argv, "", long_options,
&arg_index)) != -1) {
switch (opt) {
case 'l':
for (t = 0; t < ARRAY_SIZE(test_cases); t++) {
printf("%d\t", t);
print_test_case(&test_cases[t]);
}
return 0;
case 'n':
t = atoi(optarg);
if (t >= ARRAY_SIZE(test_cases))
error(1, 0, "Invalid test case: %d", t);
all_tests = false;
test_cases[t].enabled = true;
break;
case 's':
op_size = atoi(optarg);
break;
case 't':
all_protocols = false;
socket_types[2].enabled = true;
break;
case 'u':
all_protocols = false;
socket_types[1].enabled = true;
break;
case 'i':
all_protocols = false;
socket_types[0].enabled = true;
break;
case 'S':
strict = true;
break;
case '4':
cfg_ipv4 = true;
break;
case '6':
cfg_ipv6 = true;
break;
default:
error(1, 0, "Failed to parse parameters.");
}
}
for (s = 0; s < ARRAY_SIZE(socket_types); s++) {
if (!all_protocols && !socket_types[s].enabled)
continue;
printf("Testing %s...\n", socket_types[s].friendly_name);
for (t = 0; t < ARRAY_SIZE(test_cases); t++) {
if (!all_tests && !test_cases[t].enabled)
continue;
if (cfg_ipv4 || !cfg_ipv6)
if (run_test_case(&socket_types[s], t, '4',
strict))
failures++;
if (cfg_ipv6 || !cfg_ipv4)
if (run_test_case(&socket_types[s], t, '6',
strict))
failures++;
}
}
if (!failures)
printf("PASSED.\n");
return failures;
}
| linux-master | tools/testing/selftests/net/rxtimestamp.c |
// SPDX-License-Identifier: GPL-2.0-only
/*
* Copyright 2013 Google Inc.
* Author: Willem de Bruijn ([email protected])
*
* A basic test of packet socket fanout behavior.
*
* Control:
* - create fanout fails as expected with illegal flag combinations
* - join fanout fails as expected with diverging types or flags
*
* Datapath:
* Open a pair of packet sockets and a pair of INET sockets, send a known
* number of packets across the two INET sockets and count the number of
* packets enqueued onto the two packet sockets.
*
* The test currently runs for
* - PACKET_FANOUT_HASH
* - PACKET_FANOUT_HASH with PACKET_FANOUT_FLAG_ROLLOVER
* - PACKET_FANOUT_LB
* - PACKET_FANOUT_CPU
* - PACKET_FANOUT_ROLLOVER
* - PACKET_FANOUT_CBPF
* - PACKET_FANOUT_EBPF
*
* Todo:
* - functionality: PACKET_FANOUT_FLAG_DEFRAG
*/
#define _GNU_SOURCE /* for sched_setaffinity */
#include <arpa/inet.h>
#include <errno.h>
#include <fcntl.h>
#include <linux/unistd.h> /* for __NR_bpf */
#include <linux/filter.h>
#include <linux/bpf.h>
#include <linux/if_packet.h>
#include <net/if.h>
#include <net/ethernet.h>
#include <netinet/ip.h>
#include <netinet/udp.h>
#include <poll.h>
#include <sched.h>
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/mman.h>
#include <sys/socket.h>
#include <sys/stat.h>
#include <sys/types.h>
#include <unistd.h>
#include "psock_lib.h"
#include "../kselftest.h"
#define RING_NUM_FRAMES 20
static uint32_t cfg_max_num_members;
/* Open a socket in a given fanout mode.
* @return -1 if mode is bad, a valid socket otherwise */
static int sock_fanout_open(uint16_t typeflags, uint16_t group_id)
{
struct sockaddr_ll addr = {0};
struct fanout_args args;
int fd, val, err;
fd = socket(PF_PACKET, SOCK_RAW, 0);
if (fd < 0) {
perror("socket packet");
exit(1);
}
pair_udp_setfilter(fd);
addr.sll_family = AF_PACKET;
addr.sll_protocol = htons(ETH_P_IP);
addr.sll_ifindex = if_nametoindex("lo");
if (addr.sll_ifindex == 0) {
perror("if_nametoindex");
exit(1);
}
if (bind(fd, (void *) &addr, sizeof(addr))) {
perror("bind packet");
exit(1);
}
if (cfg_max_num_members) {
args.id = group_id;
args.type_flags = typeflags;
args.max_num_members = cfg_max_num_members;
err = setsockopt(fd, SOL_PACKET, PACKET_FANOUT, &args,
sizeof(args));
} else {
val = (((int) typeflags) << 16) | group_id;
err = setsockopt(fd, SOL_PACKET, PACKET_FANOUT, &val,
sizeof(val));
}
if (err) {
if (close(fd)) {
perror("close packet");
exit(1);
}
return -1;
}
return fd;
}
static void sock_fanout_set_cbpf(int fd)
{
struct sock_filter bpf_filter[] = {
BPF_STMT(BPF_LD | BPF_B | BPF_ABS, 80), /* ldb [80] */
BPF_STMT(BPF_RET | BPF_A, 0), /* ret A */
};
struct sock_fprog bpf_prog;
bpf_prog.filter = bpf_filter;
bpf_prog.len = ARRAY_SIZE(bpf_filter);
if (setsockopt(fd, SOL_PACKET, PACKET_FANOUT_DATA, &bpf_prog,
sizeof(bpf_prog))) {
perror("fanout data cbpf");
exit(1);
}
}
static void sock_fanout_getopts(int fd, uint16_t *typeflags, uint16_t *group_id)
{
int sockopt;
socklen_t sockopt_len = sizeof(sockopt);
if (getsockopt(fd, SOL_PACKET, PACKET_FANOUT,
&sockopt, &sockopt_len)) {
perror("failed to getsockopt");
exit(1);
}
*typeflags = sockopt >> 16;
*group_id = sockopt & 0xfffff;
}
static void sock_fanout_set_ebpf(int fd)
{
static char log_buf[65536];
const int len_off = __builtin_offsetof(struct __sk_buff, len);
struct bpf_insn prog[] = {
{ BPF_ALU64 | BPF_MOV | BPF_X, 6, 1, 0, 0 },
{ BPF_LDX | BPF_W | BPF_MEM, 0, 6, len_off, 0 },
{ BPF_JMP | BPF_JGE | BPF_K, 0, 0, 1, DATA_LEN },
{ BPF_JMP | BPF_JA | BPF_K, 0, 0, 4, 0 },
{ BPF_LD | BPF_B | BPF_ABS, 0, 0, 0, 0x50 },
{ BPF_JMP | BPF_JEQ | BPF_K, 0, 0, 2, DATA_CHAR },
{ BPF_JMP | BPF_JEQ | BPF_K, 0, 0, 1, DATA_CHAR_1 },
{ BPF_ALU | BPF_MOV | BPF_K, 0, 0, 0, 0 },
{ BPF_JMP | BPF_EXIT, 0, 0, 0, 0 }
};
union bpf_attr attr;
int pfd;
memset(&attr, 0, sizeof(attr));
attr.prog_type = BPF_PROG_TYPE_SOCKET_FILTER;
attr.insns = (unsigned long) prog;
attr.insn_cnt = ARRAY_SIZE(prog);
attr.license = (unsigned long) "GPL";
attr.log_buf = (unsigned long) log_buf,
attr.log_size = sizeof(log_buf),
attr.log_level = 1,
pfd = syscall(__NR_bpf, BPF_PROG_LOAD, &attr, sizeof(attr));
if (pfd < 0) {
perror("bpf");
fprintf(stderr, "bpf verifier:\n%s\n", log_buf);
exit(1);
}
if (setsockopt(fd, SOL_PACKET, PACKET_FANOUT_DATA, &pfd, sizeof(pfd))) {
perror("fanout data ebpf");
exit(1);
}
if (close(pfd)) {
perror("close ebpf");
exit(1);
}
}
static char *sock_fanout_open_ring(int fd)
{
struct tpacket_req req = {
.tp_block_size = getpagesize(),
.tp_frame_size = getpagesize(),
.tp_block_nr = RING_NUM_FRAMES,
.tp_frame_nr = RING_NUM_FRAMES,
};
char *ring;
int val = TPACKET_V2;
if (setsockopt(fd, SOL_PACKET, PACKET_VERSION, (void *) &val,
sizeof(val))) {
perror("packetsock ring setsockopt version");
exit(1);
}
if (setsockopt(fd, SOL_PACKET, PACKET_RX_RING, (void *) &req,
sizeof(req))) {
perror("packetsock ring setsockopt");
exit(1);
}
ring = mmap(0, req.tp_block_size * req.tp_block_nr,
PROT_READ | PROT_WRITE, MAP_SHARED, fd, 0);
if (ring == MAP_FAILED) {
perror("packetsock ring mmap");
exit(1);
}
return ring;
}
static int sock_fanout_read_ring(int fd, void *ring)
{
struct tpacket2_hdr *header = ring;
int count = 0;
while (count < RING_NUM_FRAMES && header->tp_status & TP_STATUS_USER) {
count++;
header = ring + (count * getpagesize());
}
return count;
}
static int sock_fanout_read(int fds[], char *rings[], const int expect[])
{
int ret[2];
ret[0] = sock_fanout_read_ring(fds[0], rings[0]);
ret[1] = sock_fanout_read_ring(fds[1], rings[1]);
fprintf(stderr, "info: count=%d,%d, expect=%d,%d\n",
ret[0], ret[1], expect[0], expect[1]);
if ((!(ret[0] == expect[0] && ret[1] == expect[1])) &&
(!(ret[0] == expect[1] && ret[1] == expect[0]))) {
fprintf(stderr, "warning: incorrect queue lengths\n");
return 1;
}
return 0;
}
/* Test illegal mode + flag combination */
static void test_control_single(void)
{
fprintf(stderr, "test: control single socket\n");
if (sock_fanout_open(PACKET_FANOUT_ROLLOVER |
PACKET_FANOUT_FLAG_ROLLOVER, 0) != -1) {
fprintf(stderr, "ERROR: opened socket with dual rollover\n");
exit(1);
}
}
/* Test illegal group with different modes or flags */
static void test_control_group(void)
{
int fds[2];
fprintf(stderr, "test: control multiple sockets\n");
fds[0] = sock_fanout_open(PACKET_FANOUT_HASH, 0);
if (fds[0] == -1) {
fprintf(stderr, "ERROR: failed to open HASH socket\n");
exit(1);
}
if (sock_fanout_open(PACKET_FANOUT_HASH |
PACKET_FANOUT_FLAG_DEFRAG, 0) != -1) {
fprintf(stderr, "ERROR: joined group with wrong flag defrag\n");
exit(1);
}
if (sock_fanout_open(PACKET_FANOUT_HASH |
PACKET_FANOUT_FLAG_ROLLOVER, 0) != -1) {
fprintf(stderr, "ERROR: joined group with wrong flag ro\n");
exit(1);
}
if (sock_fanout_open(PACKET_FANOUT_CPU, 0) != -1) {
fprintf(stderr, "ERROR: joined group with wrong mode\n");
exit(1);
}
fds[1] = sock_fanout_open(PACKET_FANOUT_HASH, 0);
if (fds[1] == -1) {
fprintf(stderr, "ERROR: failed to join group\n");
exit(1);
}
if (close(fds[1]) || close(fds[0])) {
fprintf(stderr, "ERROR: closing sockets\n");
exit(1);
}
}
/* Test illegal max_num_members values */
static void test_control_group_max_num_members(void)
{
int fds[3];
fprintf(stderr, "test: control multiple sockets, max_num_members\n");
/* expected failure on greater than PACKET_FANOUT_MAX */
cfg_max_num_members = (1 << 16) + 1;
if (sock_fanout_open(PACKET_FANOUT_HASH, 0) != -1) {
fprintf(stderr, "ERROR: max_num_members > PACKET_FANOUT_MAX\n");
exit(1);
}
cfg_max_num_members = 256;
fds[0] = sock_fanout_open(PACKET_FANOUT_HASH, 0);
if (fds[0] == -1) {
fprintf(stderr, "ERROR: failed open\n");
exit(1);
}
/* expected failure on joining group with different max_num_members */
cfg_max_num_members = 257;
if (sock_fanout_open(PACKET_FANOUT_HASH, 0) != -1) {
fprintf(stderr, "ERROR: set different max_num_members\n");
exit(1);
}
/* success on joining group with same max_num_members */
cfg_max_num_members = 256;
fds[1] = sock_fanout_open(PACKET_FANOUT_HASH, 0);
if (fds[1] == -1) {
fprintf(stderr, "ERROR: failed to join group\n");
exit(1);
}
/* success on joining group with max_num_members unspecified */
cfg_max_num_members = 0;
fds[2] = sock_fanout_open(PACKET_FANOUT_HASH, 0);
if (fds[2] == -1) {
fprintf(stderr, "ERROR: failed to join group\n");
exit(1);
}
if (close(fds[2]) || close(fds[1]) || close(fds[0])) {
fprintf(stderr, "ERROR: closing sockets\n");
exit(1);
}
}
/* Test creating a unique fanout group ids */
static void test_unique_fanout_group_ids(void)
{
int fds[3];
uint16_t typeflags, first_group_id, second_group_id;
fprintf(stderr, "test: unique ids\n");
fds[0] = sock_fanout_open(PACKET_FANOUT_HASH |
PACKET_FANOUT_FLAG_UNIQUEID, 0);
if (fds[0] == -1) {
fprintf(stderr, "ERROR: failed to create a unique id group.\n");
exit(1);
}
sock_fanout_getopts(fds[0], &typeflags, &first_group_id);
if (typeflags != PACKET_FANOUT_HASH) {
fprintf(stderr, "ERROR: unexpected typeflags %x\n", typeflags);
exit(1);
}
if (sock_fanout_open(PACKET_FANOUT_CPU, first_group_id) != -1) {
fprintf(stderr, "ERROR: joined group with wrong type.\n");
exit(1);
}
fds[1] = sock_fanout_open(PACKET_FANOUT_HASH, first_group_id);
if (fds[1] == -1) {
fprintf(stderr,
"ERROR: failed to join previously created group.\n");
exit(1);
}
fds[2] = sock_fanout_open(PACKET_FANOUT_HASH |
PACKET_FANOUT_FLAG_UNIQUEID, 0);
if (fds[2] == -1) {
fprintf(stderr,
"ERROR: failed to create a second unique id group.\n");
exit(1);
}
sock_fanout_getopts(fds[2], &typeflags, &second_group_id);
if (sock_fanout_open(PACKET_FANOUT_HASH | PACKET_FANOUT_FLAG_UNIQUEID,
second_group_id) != -1) {
fprintf(stderr,
"ERROR: specified a group id when requesting unique id\n");
exit(1);
}
if (close(fds[0]) || close(fds[1]) || close(fds[2])) {
fprintf(stderr, "ERROR: closing sockets\n");
exit(1);
}
}
static int test_datapath(uint16_t typeflags, int port_off,
const int expect1[], const int expect2[])
{
const int expect0[] = { 0, 0 };
char *rings[2];
uint8_t type = typeflags & 0xFF;
int fds[2], fds_udp[2][2], ret;
fprintf(stderr, "\ntest: datapath 0x%hx ports %hu,%hu\n",
typeflags, (uint16_t)PORT_BASE,
(uint16_t)(PORT_BASE + port_off));
fds[0] = sock_fanout_open(typeflags, 0);
fds[1] = sock_fanout_open(typeflags, 0);
if (fds[0] == -1 || fds[1] == -1) {
fprintf(stderr, "ERROR: failed open\n");
exit(1);
}
if (type == PACKET_FANOUT_CBPF)
sock_fanout_set_cbpf(fds[0]);
else if (type == PACKET_FANOUT_EBPF)
sock_fanout_set_ebpf(fds[0]);
rings[0] = sock_fanout_open_ring(fds[0]);
rings[1] = sock_fanout_open_ring(fds[1]);
pair_udp_open(fds_udp[0], PORT_BASE);
pair_udp_open(fds_udp[1], PORT_BASE + port_off);
sock_fanout_read(fds, rings, expect0);
/* Send data, but not enough to overflow a queue */
pair_udp_send(fds_udp[0], 15);
pair_udp_send_char(fds_udp[1], 5, DATA_CHAR_1);
ret = sock_fanout_read(fds, rings, expect1);
/* Send more data, overflow the queue */
pair_udp_send_char(fds_udp[0], 15, DATA_CHAR_1);
/* TODO: ensure consistent order between expect1 and expect2 */
ret |= sock_fanout_read(fds, rings, expect2);
if (munmap(rings[1], RING_NUM_FRAMES * getpagesize()) ||
munmap(rings[0], RING_NUM_FRAMES * getpagesize())) {
fprintf(stderr, "close rings\n");
exit(1);
}
if (close(fds_udp[1][1]) || close(fds_udp[1][0]) ||
close(fds_udp[0][1]) || close(fds_udp[0][0]) ||
close(fds[1]) || close(fds[0])) {
fprintf(stderr, "close datapath\n");
exit(1);
}
return ret;
}
static int set_cpuaffinity(int cpuid)
{
cpu_set_t mask;
CPU_ZERO(&mask);
CPU_SET(cpuid, &mask);
if (sched_setaffinity(0, sizeof(mask), &mask)) {
if (errno != EINVAL) {
fprintf(stderr, "setaffinity %d\n", cpuid);
exit(1);
}
return 1;
}
return 0;
}
int main(int argc, char **argv)
{
const int expect_hash[2][2] = { { 15, 5 }, { 20, 5 } };
const int expect_hash_rb[2][2] = { { 15, 5 }, { 20, 15 } };
const int expect_lb[2][2] = { { 10, 10 }, { 18, 17 } };
const int expect_rb[2][2] = { { 15, 5 }, { 20, 15 } };
const int expect_cpu0[2][2] = { { 20, 0 }, { 20, 0 } };
const int expect_cpu1[2][2] = { { 0, 20 }, { 0, 20 } };
const int expect_bpf[2][2] = { { 15, 5 }, { 15, 20 } };
const int expect_uniqueid[2][2] = { { 20, 20}, { 20, 20 } };
int port_off = 2, tries = 20, ret;
test_control_single();
test_control_group();
test_control_group_max_num_members();
test_unique_fanout_group_ids();
/* PACKET_FANOUT_MAX */
cfg_max_num_members = 1 << 16;
/* find a set of ports that do not collide onto the same socket */
ret = test_datapath(PACKET_FANOUT_HASH, port_off,
expect_hash[0], expect_hash[1]);
while (ret) {
fprintf(stderr, "info: trying alternate ports (%d)\n", tries);
ret = test_datapath(PACKET_FANOUT_HASH, ++port_off,
expect_hash[0], expect_hash[1]);
if (!--tries) {
fprintf(stderr, "too many collisions\n");
return 1;
}
}
ret |= test_datapath(PACKET_FANOUT_HASH | PACKET_FANOUT_FLAG_ROLLOVER,
port_off, expect_hash_rb[0], expect_hash_rb[1]);
ret |= test_datapath(PACKET_FANOUT_LB,
port_off, expect_lb[0], expect_lb[1]);
ret |= test_datapath(PACKET_FANOUT_ROLLOVER,
port_off, expect_rb[0], expect_rb[1]);
ret |= test_datapath(PACKET_FANOUT_CBPF,
port_off, expect_bpf[0], expect_bpf[1]);
ret |= test_datapath(PACKET_FANOUT_EBPF,
port_off, expect_bpf[0], expect_bpf[1]);
set_cpuaffinity(0);
ret |= test_datapath(PACKET_FANOUT_CPU, port_off,
expect_cpu0[0], expect_cpu0[1]);
if (!set_cpuaffinity(1))
/* TODO: test that choice alternates with previous */
ret |= test_datapath(PACKET_FANOUT_CPU, port_off,
expect_cpu1[0], expect_cpu1[1]);
ret |= test_datapath(PACKET_FANOUT_FLAG_UNIQUEID, port_off,
expect_uniqueid[0], expect_uniqueid[1]);
if (ret)
return 1;
printf("OK. All tests passed\n");
return 0;
}
| linux-master | tools/testing/selftests/net/psock_fanout.c |
// SPDX-License-Identifier: GPL-2.0
/* Test program for SIOC{G,S}HWTSTAMP
* Copyright 2013 Solarflare Communications
* Author: Ben Hutchings
*/
#include <errno.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/socket.h>
#include <sys/ioctl.h>
#include <linux/if.h>
#include <linux/net_tstamp.h>
#include <linux/sockios.h>
#include "kselftest.h"
static int
lookup_value(const char **names, int size, const char *name)
{
int value;
for (value = 0; value < size; value++)
if (names[value] && strcasecmp(names[value], name) == 0)
return value;
return -1;
}
static const char *
lookup_name(const char **names, int size, int value)
{
return (value >= 0 && value < size) ? names[value] : NULL;
}
static void list_names(FILE *f, const char **names, int size)
{
int value;
for (value = 0; value < size; value++)
if (names[value])
fprintf(f, " %s\n", names[value]);
}
static const char *tx_types[] = {
#define TX_TYPE(name) [HWTSTAMP_TX_ ## name] = #name
TX_TYPE(OFF),
TX_TYPE(ON),
TX_TYPE(ONESTEP_SYNC)
#undef TX_TYPE
};
#define N_TX_TYPES ((int)(ARRAY_SIZE(tx_types)))
static const char *rx_filters[] = {
#define RX_FILTER(name) [HWTSTAMP_FILTER_ ## name] = #name
RX_FILTER(NONE),
RX_FILTER(ALL),
RX_FILTER(SOME),
RX_FILTER(PTP_V1_L4_EVENT),
RX_FILTER(PTP_V1_L4_SYNC),
RX_FILTER(PTP_V1_L4_DELAY_REQ),
RX_FILTER(PTP_V2_L4_EVENT),
RX_FILTER(PTP_V2_L4_SYNC),
RX_FILTER(PTP_V2_L4_DELAY_REQ),
RX_FILTER(PTP_V2_L2_EVENT),
RX_FILTER(PTP_V2_L2_SYNC),
RX_FILTER(PTP_V2_L2_DELAY_REQ),
RX_FILTER(PTP_V2_EVENT),
RX_FILTER(PTP_V2_SYNC),
RX_FILTER(PTP_V2_DELAY_REQ),
#undef RX_FILTER
};
#define N_RX_FILTERS ((int)(ARRAY_SIZE(rx_filters)))
static void usage(void)
{
fputs("Usage: hwtstamp_config if_name [tx_type rx_filter]\n"
"tx_type is any of (case-insensitive):\n",
stderr);
list_names(stderr, tx_types, N_TX_TYPES);
fputs("rx_filter is any of (case-insensitive):\n", stderr);
list_names(stderr, rx_filters, N_RX_FILTERS);
}
int main(int argc, char **argv)
{
struct ifreq ifr;
struct hwtstamp_config config;
const char *name;
int sock;
if ((argc != 2 && argc != 4) || (strlen(argv[1]) >= IFNAMSIZ)) {
usage();
return 2;
}
if (argc == 4) {
config.flags = 0;
config.tx_type = lookup_value(tx_types, N_TX_TYPES, argv[2]);
config.rx_filter = lookup_value(rx_filters, N_RX_FILTERS, argv[3]);
if (config.tx_type < 0 || config.rx_filter < 0) {
usage();
return 2;
}
}
sock = socket(AF_INET, SOCK_DGRAM, 0);
if (sock < 0) {
perror("socket");
return 1;
}
strcpy(ifr.ifr_name, argv[1]);
ifr.ifr_data = (caddr_t)&config;
if (ioctl(sock, (argc == 2) ? SIOCGHWTSTAMP : SIOCSHWTSTAMP, &ifr)) {
perror("ioctl");
return 1;
}
printf("flags = %#x\n", config.flags);
name = lookup_name(tx_types, N_TX_TYPES, config.tx_type);
if (name)
printf("tx_type = %s\n", name);
else
printf("tx_type = %d\n", config.tx_type);
name = lookup_name(rx_filters, N_RX_FILTERS, config.rx_filter);
if (name)
printf("rx_filter = %s\n", name);
else
printf("rx_filter = %d\n", config.rx_filter);
return 0;
}
| linux-master | tools/testing/selftests/net/hwtstamp_config.c |
// SPDX-License-Identifier: GPL-2.0
/* Copyright (c) 2022 Meta Platforms, Inc. and affiliates. */
/* Test listening on the same port 443 with multiple VIPS.
* Each VIP:443 will have multiple sk listening on by using
* SO_REUSEPORT.
*/
#include <unistd.h>
#include <stdio.h>
#include <stdlib.h>
#include <error.h>
#include <errno.h>
#include <time.h>
#include <arpa/inet.h>
#define IP6_LADDR_START "2401:dead::1"
#define IP6_LPORT 443
#define NSEC_PER_SEC 1000000000L
#define NSEC_PER_USEC 1000L
static unsigned int nr_socks_per_vip;
static unsigned int nr_vips;
static int *bind_reuseport_sock6(void)
{
int *lfds, *cur_fd, err, optvalue = 1;
struct sockaddr_in6 sa6 = {};
unsigned int i, j;
sa6.sin6_family = AF_INET6;
sa6.sin6_port = htons(IP6_LPORT);
err = inet_pton(AF_INET6, IP6_LADDR_START, &sa6.sin6_addr);
if (err != 1)
error(1, err, "inet_pton(%s)", IP6_LADDR_START);
lfds = malloc(nr_vips * nr_socks_per_vip * sizeof(lfds[0]));
if (!lfds)
error(1, errno, "cannot alloc array of lfds");
cur_fd = lfds;
for (i = 0; i < nr_vips; i++) {
for (j = 0; j < nr_socks_per_vip; j++) {
*cur_fd = socket(AF_INET6, SOCK_STREAM, 0);
if (*cur_fd == -1)
error(1, errno,
"lfds[%u,%u] = socket(AF_INET6)", i, j);
err = setsockopt(*cur_fd, SOL_SOCKET, SO_REUSEPORT,
&optvalue, sizeof(optvalue));
if (err)
error(1, errno,
"setsockopt(lfds[%u,%u], SO_REUSEPORT)",
i, j);
err = bind(*cur_fd, (struct sockaddr *)&sa6,
sizeof(sa6));
if (err)
error(1, errno, "bind(lfds[%u,%u])", i, j);
cur_fd++;
}
sa6.sin6_addr.s6_addr32[3]++;
}
return lfds;
}
int main(int argc, const char *argv[])
{
struct timespec start_ts, end_ts;
unsigned long start_ns, end_ns;
unsigned int nr_lsocks;
int *lfds, i, err;
if (argc != 3 || atoi(argv[1]) <= 0 || atoi(argv[2]) <= 0)
error(1, 0, "Usage: %s <nr_vips> <nr_socks_per_vip>\n",
argv[0]);
nr_vips = atoi(argv[1]);
nr_socks_per_vip = atoi(argv[2]);
nr_lsocks = nr_vips * nr_socks_per_vip;
lfds = bind_reuseport_sock6();
clock_gettime(CLOCK_MONOTONIC, &start_ts);
for (i = 0; i < nr_lsocks; i++) {
err = listen(lfds[i], 0);
if (err)
error(1, errno, "listen(lfds[%d])", i);
}
clock_gettime(CLOCK_MONOTONIC, &end_ts);
start_ns = start_ts.tv_sec * NSEC_PER_SEC + start_ts.tv_nsec;
end_ns = end_ts.tv_sec * NSEC_PER_SEC + end_ts.tv_nsec;
printf("listen %d socks took %lu.%lu\n", nr_lsocks,
(end_ns - start_ns) / NSEC_PER_SEC,
(end_ns - start_ns) / NSEC_PER_USEC);
for (i = 0; i < nr_lsocks; i++)
close(lfds[i]);
free(lfds);
return 0;
}
| linux-master | tools/testing/selftests/net/stress_reuseport_listen.c |
// SPDX-License-Identifier: GPL-2.0
/* Test hardware checksum offload: Rx + Tx, IPv4 + IPv6, TCP + UDP.
*
* The test runs on two machines to exercise the NIC. For this reason it
* is not integrated in kselftests.
*
* CMD=$((./csum -[46] -[tu] -S $SADDR -D $DADDR -[RT] -r 1 $EXTRA_ARGS))
*
* Rx:
*
* The sender sends packets with a known checksum field using PF_INET(6)
* SOCK_RAW sockets.
*
* good packet: $CMD [-t]
* bad packet: $CMD [-t] -E
*
* The receiver reads UDP packets with a UDP socket. This is not an
* option for TCP packets ('-t'). Optionally insert an iptables filter
* to avoid these entering the real protocol stack.
*
* The receiver also reads all packets with a PF_PACKET socket, to
* observe whether both good and bad packets arrive on the host. And to
* read the optional TP_STATUS_CSUM_VALID bit. This requires setting
* option PACKET_AUXDATA, and works only for CHECKSUM_UNNECESSARY.
*
* Tx:
*
* The sender needs to build CHECKSUM_PARTIAL packets to exercise tx
* checksum offload.
*
* The sender can sends packets with a UDP socket.
*
* Optionally crafts a packet that sums up to zero to verify that the
* device writes negative zero 0xFFFF in this case to distinguish from
* 0x0000 (checksum disabled), as required by RFC 768. Hit this case
* by choosing a specific source port.
*
* good packet: $CMD -U
* zero csum: $CMD -U -Z
*
* The sender can also build packets with PF_PACKET with PACKET_VNET_HDR,
* to cover more protocols. PF_PACKET requires passing src and dst mac
* addresses.
*
* good packet: $CMD -s $smac -d $dmac -p [-t]
*
* Argument '-z' sends UDP packets with a 0x000 checksum disabled field,
* to verify that the NIC passes these packets unmodified.
*
* Argument '-e' adds a transport mode encapsulation header between
* network and transport header. This will fail for devices that parse
* headers. Should work on devices that implement protocol agnostic tx
* checksum offload (NETIF_F_HW_CSUM).
*
* Argument '-r $SEED' optionally randomizes header, payload and length
* to increase coverage between packets sent. SEED 1 further chooses a
* different seed for each run (and logs this for reproducibility). It
* is advised to enable this for extra coverage in continuous testing.
*/
#define _GNU_SOURCE
#include <arpa/inet.h>
#include <asm/byteorder.h>
#include <errno.h>
#include <error.h>
#include <linux/filter.h>
#include <linux/if_packet.h>
#include <linux/ipv6.h>
#include <linux/virtio_net.h>
#include <net/ethernet.h>
#include <net/if.h>
#include <netinet/if_ether.h>
#include <netinet/in.h>
#include <netinet/ip.h>
#include <netinet/ip6.h>
#include <netinet/tcp.h>
#include <netinet/udp.h>
#include <poll.h>
#include <sched.h>
#include <stdbool.h>
#include <stddef.h>
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/socket.h>
#include <sys/stat.h>
#include <sys/time.h>
#include <sys/types.h>
#include <unistd.h>
#include "kselftest.h"
static bool cfg_bad_csum;
static int cfg_family = PF_INET6;
static int cfg_num_pkt = 4;
static bool cfg_do_rx = true;
static bool cfg_do_tx = true;
static bool cfg_encap;
static char *cfg_ifname = "eth0";
static char *cfg_mac_dst;
static char *cfg_mac_src;
static int cfg_proto = IPPROTO_UDP;
static int cfg_payload_char = 'a';
static int cfg_payload_len = 100;
static uint16_t cfg_port_dst = 34000;
static uint16_t cfg_port_src = 33000;
static uint16_t cfg_port_src_encap = 33001;
static unsigned int cfg_random_seed;
static int cfg_rcvbuf = 1 << 22; /* be able to queue large cfg_num_pkt */
static bool cfg_send_pfpacket;
static bool cfg_send_udp;
static int cfg_timeout_ms = 2000;
static bool cfg_zero_disable; /* skip checksum: set to zero (udp only) */
static bool cfg_zero_sum; /* create packet that adds up to zero */
static struct sockaddr_in cfg_daddr4 = {.sin_family = AF_INET};
static struct sockaddr_in cfg_saddr4 = {.sin_family = AF_INET};
static struct sockaddr_in6 cfg_daddr6 = {.sin6_family = AF_INET6};
static struct sockaddr_in6 cfg_saddr6 = {.sin6_family = AF_INET6};
#define ENC_HEADER_LEN (sizeof(struct udphdr) + sizeof(struct udp_encap_hdr))
#define MAX_HEADER_LEN (sizeof(struct ipv6hdr) + ENC_HEADER_LEN + sizeof(struct tcphdr))
#define MAX_PAYLOAD_LEN 1024
/* Trivial demo encap. Stand-in for transport layer protocols like ESP or PSP */
struct udp_encap_hdr {
uint8_t nexthdr;
uint8_t padding[3];
};
/* Ipaddrs, for pseudo csum. Global var is ugly, pass through funcs was worse */
static void *iph_addr_p;
static unsigned long gettimeofday_ms(void)
{
struct timeval tv;
gettimeofday(&tv, NULL);
return (tv.tv_sec * 1000UL) + (tv.tv_usec / 1000UL);
}
static uint32_t checksum_nofold(char *data, size_t len, uint32_t sum)
{
uint16_t *words = (uint16_t *)data;
int i;
for (i = 0; i < len / 2; i++)
sum += words[i];
if (len & 1)
sum += ((unsigned char *)data)[len - 1];
return sum;
}
static uint16_t checksum_fold(void *data, size_t len, uint32_t sum)
{
sum = checksum_nofold(data, len, sum);
while (sum > 0xFFFF)
sum = (sum & 0xFFFF) + (sum >> 16);
return ~sum;
}
static uint16_t checksum(void *th, uint16_t proto, size_t len)
{
uint32_t sum;
int alen;
alen = cfg_family == PF_INET6 ? 32 : 8;
sum = checksum_nofold(iph_addr_p, alen, 0);
sum += htons(proto);
sum += htons(len);
/* With CHECKSUM_PARTIAL kernel expects non-inverted pseudo csum */
if (cfg_do_tx && cfg_send_pfpacket)
return ~checksum_fold(NULL, 0, sum);
else
return checksum_fold(th, len, sum);
}
static void *build_packet_ipv4(void *_iph, uint8_t proto, unsigned int len)
{
struct iphdr *iph = _iph;
memset(iph, 0, sizeof(*iph));
iph->version = 4;
iph->ihl = 5;
iph->ttl = 8;
iph->protocol = proto;
iph->saddr = cfg_saddr4.sin_addr.s_addr;
iph->daddr = cfg_daddr4.sin_addr.s_addr;
iph->tot_len = htons(sizeof(*iph) + len);
iph->check = checksum_fold(iph, sizeof(*iph), 0);
iph_addr_p = &iph->saddr;
return iph + 1;
}
static void *build_packet_ipv6(void *_ip6h, uint8_t proto, unsigned int len)
{
struct ipv6hdr *ip6h = _ip6h;
memset(ip6h, 0, sizeof(*ip6h));
ip6h->version = 6;
ip6h->payload_len = htons(len);
ip6h->nexthdr = proto;
ip6h->hop_limit = 64;
ip6h->saddr = cfg_saddr6.sin6_addr;
ip6h->daddr = cfg_daddr6.sin6_addr;
iph_addr_p = &ip6h->saddr;
return ip6h + 1;
}
static void *build_packet_udp(void *_uh)
{
struct udphdr *uh = _uh;
uh->source = htons(cfg_port_src);
uh->dest = htons(cfg_port_dst);
uh->len = htons(sizeof(*uh) + cfg_payload_len);
uh->check = 0;
/* choose source port so that uh->check adds up to zero */
if (cfg_zero_sum) {
uh->source = 0;
uh->source = checksum(uh, IPPROTO_UDP, sizeof(*uh) + cfg_payload_len);
fprintf(stderr, "tx: changing sport: %hu -> %hu\n",
cfg_port_src, ntohs(uh->source));
cfg_port_src = ntohs(uh->source);
}
if (cfg_zero_disable)
uh->check = 0;
else
uh->check = checksum(uh, IPPROTO_UDP, sizeof(*uh) + cfg_payload_len);
if (cfg_bad_csum)
uh->check = ~uh->check;
fprintf(stderr, "tx: sending checksum: 0x%x\n", uh->check);
return uh + 1;
}
static void *build_packet_tcp(void *_th)
{
struct tcphdr *th = _th;
th->source = htons(cfg_port_src);
th->dest = htons(cfg_port_dst);
th->doff = 5;
th->check = 0;
th->check = checksum(th, IPPROTO_TCP, sizeof(*th) + cfg_payload_len);
if (cfg_bad_csum)
th->check = ~th->check;
fprintf(stderr, "tx: sending checksum: 0x%x\n", th->check);
return th + 1;
}
static char *build_packet_udp_encap(void *_uh)
{
struct udphdr *uh = _uh;
struct udp_encap_hdr *eh = _uh + sizeof(*uh);
/* outer dst == inner dst, to simplify BPF filter
* outer src != inner src, to demultiplex on recv
*/
uh->dest = htons(cfg_port_dst);
uh->source = htons(cfg_port_src_encap);
uh->check = 0;
uh->len = htons(sizeof(*uh) +
sizeof(*eh) +
sizeof(struct tcphdr) +
cfg_payload_len);
eh->nexthdr = IPPROTO_TCP;
return build_packet_tcp(eh + 1);
}
static char *build_packet(char *buf, int max_len, int *len)
{
uint8_t proto;
char *off;
int tlen;
if (cfg_random_seed) {
int *buf32 = (void *)buf;
int i;
for (i = 0; i < (max_len / sizeof(int)); i++)
buf32[i] = rand();
} else {
memset(buf, cfg_payload_char, max_len);
}
if (cfg_proto == IPPROTO_UDP)
tlen = sizeof(struct udphdr) + cfg_payload_len;
else
tlen = sizeof(struct tcphdr) + cfg_payload_len;
if (cfg_encap) {
proto = IPPROTO_UDP;
tlen += ENC_HEADER_LEN;
} else {
proto = cfg_proto;
}
if (cfg_family == PF_INET)
off = build_packet_ipv4(buf, proto, tlen);
else
off = build_packet_ipv6(buf, proto, tlen);
if (cfg_encap)
off = build_packet_udp_encap(off);
else if (cfg_proto == IPPROTO_UDP)
off = build_packet_udp(off);
else
off = build_packet_tcp(off);
/* only pass the payload, but still compute headers for cfg_zero_sum */
if (cfg_send_udp) {
*len = cfg_payload_len;
return off;
}
*len = off - buf + cfg_payload_len;
return buf;
}
static int open_inet(int ipproto, int protocol)
{
int fd;
fd = socket(cfg_family, ipproto, protocol);
if (fd == -1)
error(1, errno, "socket inet");
if (cfg_family == PF_INET6) {
/* may have been updated by cfg_zero_sum */
cfg_saddr6.sin6_port = htons(cfg_port_src);
if (bind(fd, (void *)&cfg_saddr6, sizeof(cfg_saddr6)))
error(1, errno, "bind dgram 6");
if (connect(fd, (void *)&cfg_daddr6, sizeof(cfg_daddr6)))
error(1, errno, "connect dgram 6");
} else {
/* may have been updated by cfg_zero_sum */
cfg_saddr4.sin_port = htons(cfg_port_src);
if (bind(fd, (void *)&cfg_saddr4, sizeof(cfg_saddr4)))
error(1, errno, "bind dgram 4");
if (connect(fd, (void *)&cfg_daddr4, sizeof(cfg_daddr4)))
error(1, errno, "connect dgram 4");
}
return fd;
}
static int open_packet(void)
{
int fd, one = 1;
fd = socket(PF_PACKET, SOCK_RAW, 0);
if (fd == -1)
error(1, errno, "socket packet");
if (setsockopt(fd, SOL_PACKET, PACKET_VNET_HDR, &one, sizeof(one)))
error(1, errno, "setsockopt packet_vnet_ndr");
return fd;
}
static void send_inet(int fd, const char *buf, int len)
{
int ret;
ret = write(fd, buf, len);
if (ret == -1)
error(1, errno, "write");
if (ret != len)
error(1, 0, "write: %d", ret);
}
static void eth_str_to_addr(const char *str, unsigned char *eth)
{
if (sscanf(str, "%hhx:%hhx:%hhx:%hhx:%hhx:%hhx",
ð[0], ð[1], ð[2], ð[3], ð[4], ð[5]) != 6)
error(1, 0, "cannot parse mac addr %s", str);
}
static void send_packet(int fd, const char *buf, int len)
{
struct virtio_net_hdr vh = {0};
struct sockaddr_ll addr = {0};
struct msghdr msg = {0};
struct ethhdr eth;
struct iovec iov[3];
int ret;
addr.sll_family = AF_PACKET;
addr.sll_halen = ETH_ALEN;
addr.sll_ifindex = if_nametoindex(cfg_ifname);
if (!addr.sll_ifindex)
error(1, errno, "if_nametoindex %s", cfg_ifname);
vh.flags = VIRTIO_NET_HDR_F_NEEDS_CSUM;
if (cfg_family == PF_INET6) {
vh.csum_start = sizeof(struct ethhdr) + sizeof(struct ipv6hdr);
addr.sll_protocol = htons(ETH_P_IPV6);
} else {
vh.csum_start = sizeof(struct ethhdr) + sizeof(struct iphdr);
addr.sll_protocol = htons(ETH_P_IP);
}
if (cfg_encap)
vh.csum_start += ENC_HEADER_LEN;
if (cfg_proto == IPPROTO_TCP) {
vh.csum_offset = __builtin_offsetof(struct tcphdr, check);
vh.hdr_len = vh.csum_start + sizeof(struct tcphdr);
} else {
vh.csum_offset = __builtin_offsetof(struct udphdr, check);
vh.hdr_len = vh.csum_start + sizeof(struct udphdr);
}
eth_str_to_addr(cfg_mac_src, eth.h_source);
eth_str_to_addr(cfg_mac_dst, eth.h_dest);
eth.h_proto = addr.sll_protocol;
iov[0].iov_base = &vh;
iov[0].iov_len = sizeof(vh);
iov[1].iov_base = ð
iov[1].iov_len = sizeof(eth);
iov[2].iov_base = (void *)buf;
iov[2].iov_len = len;
msg.msg_iov = iov;
msg.msg_iovlen = ARRAY_SIZE(iov);
msg.msg_name = &addr;
msg.msg_namelen = sizeof(addr);
ret = sendmsg(fd, &msg, 0);
if (ret == -1)
error(1, errno, "sendmsg packet");
if (ret != sizeof(vh) + sizeof(eth) + len)
error(1, errno, "sendmsg packet: %u", ret);
}
static int recv_prepare_udp(void)
{
int fd;
fd = socket(cfg_family, SOCK_DGRAM, 0);
if (fd == -1)
error(1, errno, "socket r");
if (setsockopt(fd, SOL_SOCKET, SO_RCVBUF,
&cfg_rcvbuf, sizeof(cfg_rcvbuf)))
error(1, errno, "setsockopt SO_RCVBUF r");
if (cfg_family == PF_INET6) {
if (bind(fd, (void *)&cfg_daddr6, sizeof(cfg_daddr6)))
error(1, errno, "bind r");
} else {
if (bind(fd, (void *)&cfg_daddr4, sizeof(cfg_daddr4)))
error(1, errno, "bind r");
}
return fd;
}
/* Filter out all traffic that is not cfg_proto with our destination port.
*
* Otherwise background noise may cause PF_PACKET receive queue overflow,
* dropping the expected packets and failing the test.
*/
static void __recv_prepare_packet_filter(int fd, int off_nexthdr, int off_dport)
{
struct sock_filter filter[] = {
BPF_STMT(BPF_LD + BPF_B + BPF_ABS, SKF_AD_OFF + SKF_AD_PKTTYPE),
BPF_JUMP(BPF_JMP + BPF_JEQ + BPF_K, PACKET_HOST, 0, 4),
BPF_STMT(BPF_LD + BPF_B + BPF_ABS, off_nexthdr),
BPF_JUMP(BPF_JMP + BPF_JEQ + BPF_K, cfg_encap ? IPPROTO_UDP : cfg_proto, 0, 2),
BPF_STMT(BPF_LD + BPF_H + BPF_ABS, off_dport),
BPF_JUMP(BPF_JMP + BPF_JEQ + BPF_K, cfg_port_dst, 1, 0),
BPF_STMT(BPF_RET + BPF_K, 0),
BPF_STMT(BPF_RET + BPF_K, 0xFFFF),
};
struct sock_fprog prog = {};
prog.filter = filter;
prog.len = ARRAY_SIZE(filter);
if (setsockopt(fd, SOL_SOCKET, SO_ATTACH_FILTER, &prog, sizeof(prog)))
error(1, errno, "setsockopt filter");
}
static void recv_prepare_packet_filter(int fd)
{
const int off_dport = offsetof(struct tcphdr, dest); /* same for udp */
if (cfg_family == AF_INET)
__recv_prepare_packet_filter(fd, offsetof(struct iphdr, protocol),
sizeof(struct iphdr) + off_dport);
else
__recv_prepare_packet_filter(fd, offsetof(struct ipv6hdr, nexthdr),
sizeof(struct ipv6hdr) + off_dport);
}
static void recv_prepare_packet_bind(int fd)
{
struct sockaddr_ll laddr = {0};
laddr.sll_family = AF_PACKET;
if (cfg_family == PF_INET)
laddr.sll_protocol = htons(ETH_P_IP);
else
laddr.sll_protocol = htons(ETH_P_IPV6);
laddr.sll_ifindex = if_nametoindex(cfg_ifname);
if (!laddr.sll_ifindex)
error(1, 0, "if_nametoindex %s", cfg_ifname);
if (bind(fd, (void *)&laddr, sizeof(laddr)))
error(1, errno, "bind pf_packet");
}
static int recv_prepare_packet(void)
{
int fd, one = 1;
fd = socket(PF_PACKET, SOCK_DGRAM, 0);
if (fd == -1)
error(1, errno, "socket p");
if (setsockopt(fd, SOL_SOCKET, SO_RCVBUF,
&cfg_rcvbuf, sizeof(cfg_rcvbuf)))
error(1, errno, "setsockopt SO_RCVBUF p");
/* enable auxdata to recv checksum status (valid vs unknown) */
if (setsockopt(fd, SOL_PACKET, PACKET_AUXDATA, &one, sizeof(one)))
error(1, errno, "setsockopt auxdata");
/* install filter to restrict packet flow to match */
recv_prepare_packet_filter(fd);
/* bind to address family to start packet flow */
recv_prepare_packet_bind(fd);
return fd;
}
static int recv_udp(int fd)
{
static char buf[MAX_PAYLOAD_LEN];
int ret, count = 0;
while (1) {
ret = recv(fd, buf, sizeof(buf), MSG_DONTWAIT);
if (ret == -1 && errno == EAGAIN)
break;
if (ret == -1)
error(1, errno, "recv r");
fprintf(stderr, "rx: udp: len=%u\n", ret);
count++;
}
return count;
}
static int recv_verify_csum(void *th, int len, uint16_t sport, uint16_t csum_field)
{
uint16_t csum;
csum = checksum(th, cfg_proto, len);
fprintf(stderr, "rx: pkt: sport=%hu len=%u csum=0x%hx verify=0x%hx\n",
sport, len, csum_field, csum);
/* csum must be zero unless cfg_bad_csum indicates bad csum */
if (csum && !cfg_bad_csum) {
fprintf(stderr, "pkt: bad csum\n");
return 1;
} else if (cfg_bad_csum && !csum) {
fprintf(stderr, "pkt: good csum, while bad expected\n");
return 1;
}
if (cfg_zero_sum && csum_field != 0xFFFF) {
fprintf(stderr, "pkt: zero csum: field should be 0xFFFF, is 0x%hx\n", csum_field);
return 1;
}
return 0;
}
static int recv_verify_packet_tcp(void *th, int len)
{
struct tcphdr *tcph = th;
if (len < sizeof(*tcph) || tcph->dest != htons(cfg_port_dst))
return -1;
return recv_verify_csum(th, len, ntohs(tcph->source), tcph->check);
}
static int recv_verify_packet_udp_encap(void *th, int len)
{
struct udp_encap_hdr *eh = th;
if (len < sizeof(*eh) || eh->nexthdr != IPPROTO_TCP)
return -1;
return recv_verify_packet_tcp(eh + 1, len - sizeof(*eh));
}
static int recv_verify_packet_udp(void *th, int len)
{
struct udphdr *udph = th;
if (len < sizeof(*udph))
return -1;
if (udph->dest != htons(cfg_port_dst))
return -1;
if (udph->source == htons(cfg_port_src_encap))
return recv_verify_packet_udp_encap(udph + 1,
len - sizeof(*udph));
return recv_verify_csum(th, len, ntohs(udph->source), udph->check);
}
static int recv_verify_packet_ipv4(void *nh, int len)
{
struct iphdr *iph = nh;
uint16_t proto = cfg_encap ? IPPROTO_UDP : cfg_proto;
if (len < sizeof(*iph) || iph->protocol != proto)
return -1;
iph_addr_p = &iph->saddr;
if (proto == IPPROTO_TCP)
return recv_verify_packet_tcp(iph + 1, len - sizeof(*iph));
else
return recv_verify_packet_udp(iph + 1, len - sizeof(*iph));
}
static int recv_verify_packet_ipv6(void *nh, int len)
{
struct ipv6hdr *ip6h = nh;
uint16_t proto = cfg_encap ? IPPROTO_UDP : cfg_proto;
if (len < sizeof(*ip6h) || ip6h->nexthdr != proto)
return -1;
iph_addr_p = &ip6h->saddr;
if (proto == IPPROTO_TCP)
return recv_verify_packet_tcp(ip6h + 1, len - sizeof(*ip6h));
else
return recv_verify_packet_udp(ip6h + 1, len - sizeof(*ip6h));
}
/* return whether auxdata includes TP_STATUS_CSUM_VALID */
static bool recv_verify_packet_csum(struct msghdr *msg)
{
struct tpacket_auxdata *aux = NULL;
struct cmsghdr *cm;
if (msg->msg_flags & MSG_CTRUNC)
error(1, 0, "cmsg: truncated");
for (cm = CMSG_FIRSTHDR(msg); cm; cm = CMSG_NXTHDR(msg, cm)) {
if (cm->cmsg_level != SOL_PACKET ||
cm->cmsg_type != PACKET_AUXDATA)
error(1, 0, "cmsg: level=%d type=%d\n",
cm->cmsg_level, cm->cmsg_type);
if (cm->cmsg_len != CMSG_LEN(sizeof(struct tpacket_auxdata)))
error(1, 0, "cmsg: len=%lu expected=%lu",
cm->cmsg_len, CMSG_LEN(sizeof(struct tpacket_auxdata)));
aux = (void *)CMSG_DATA(cm);
}
if (!aux)
error(1, 0, "cmsg: no auxdata");
return aux->tp_status & TP_STATUS_CSUM_VALID;
}
static int recv_packet(int fd)
{
static char _buf[MAX_HEADER_LEN + MAX_PAYLOAD_LEN];
unsigned long total = 0, bad_csums = 0, bad_validations = 0;
char ctrl[CMSG_SPACE(sizeof(struct tpacket_auxdata))];
struct pkt *buf = (void *)_buf;
struct msghdr msg = {0};
struct iovec iov;
int len, ret;
iov.iov_base = _buf;
iov.iov_len = sizeof(_buf);
msg.msg_iov = &iov;
msg.msg_iovlen = 1;
msg.msg_control = ctrl;
msg.msg_controllen = sizeof(ctrl);
while (1) {
msg.msg_flags = 0;
len = recvmsg(fd, &msg, MSG_DONTWAIT);
if (len == -1 && errno == EAGAIN)
break;
if (len == -1)
error(1, errno, "recv p");
if (cfg_family == PF_INET6)
ret = recv_verify_packet_ipv6(buf, len);
else
ret = recv_verify_packet_ipv4(buf, len);
if (ret == -1 /* skip: non-matching */)
continue;
total++;
if (ret == 1)
bad_csums++;
/* Fail if kernel returns valid for known bad csum.
* Do not fail if kernel does not validate a good csum:
* Absence of validation does not imply invalid.
*/
if (recv_verify_packet_csum(&msg) && cfg_bad_csum) {
fprintf(stderr, "cmsg: expected bad csum, pf_packet returns valid\n");
bad_validations++;
}
}
if (bad_csums || bad_validations)
error(1, 0, "rx: errors at pf_packet: total=%lu bad_csums=%lu bad_valids=%lu\n",
total, bad_csums, bad_validations);
return total;
}
static void parse_args(int argc, char *const argv[])
{
const char *daddr = NULL, *saddr = NULL;
int c;
while ((c = getopt(argc, argv, "46d:D:eEi:l:L:n:r:PRs:S:tTuUzZ")) != -1) {
switch (c) {
case '4':
cfg_family = PF_INET;
break;
case '6':
cfg_family = PF_INET6;
break;
case 'd':
cfg_mac_dst = optarg;
break;
case 'D':
daddr = optarg;
break;
case 'e':
cfg_encap = true;
break;
case 'E':
cfg_bad_csum = true;
break;
case 'i':
cfg_ifname = optarg;
break;
case 'l':
cfg_payload_len = strtol(optarg, NULL, 0);
break;
case 'L':
cfg_timeout_ms = strtol(optarg, NULL, 0) * 1000;
break;
case 'n':
cfg_num_pkt = strtol(optarg, NULL, 0);
break;
case 'r':
cfg_random_seed = strtol(optarg, NULL, 0);
break;
case 'P':
cfg_send_pfpacket = true;
break;
case 'R':
/* only Rx: used with two machine tests */
cfg_do_tx = false;
break;
case 's':
cfg_mac_src = optarg;
break;
case 'S':
saddr = optarg;
break;
case 't':
cfg_proto = IPPROTO_TCP;
break;
case 'T':
/* only Tx: used with two machine tests */
cfg_do_rx = false;
break;
case 'u':
cfg_proto = IPPROTO_UDP;
break;
case 'U':
/* send using real udp socket,
* to exercise tx checksum offload
*/
cfg_send_udp = true;
break;
case 'z':
cfg_zero_disable = true;
break;
case 'Z':
cfg_zero_sum = true;
break;
default:
error(1, 0, "unknown arg %c", c);
}
}
if (!daddr || !saddr)
error(1, 0, "Must pass -D <daddr> and -S <saddr>");
if (cfg_do_tx && cfg_send_pfpacket && (!cfg_mac_src || !cfg_mac_dst))
error(1, 0, "Transmit with pf_packet requires mac addresses");
if (cfg_payload_len > MAX_PAYLOAD_LEN)
error(1, 0, "Payload length exceeds max");
if (cfg_proto != IPPROTO_UDP && (cfg_zero_sum || cfg_zero_disable))
error(1, 0, "Only UDP supports zero csum");
if (cfg_zero_sum && !cfg_send_udp)
error(1, 0, "Zero checksum conversion requires -U for tx csum offload");
if (cfg_zero_sum && cfg_bad_csum)
error(1, 0, "Cannot combine zero checksum conversion and invalid checksum");
if (cfg_zero_sum && cfg_random_seed)
error(1, 0, "Cannot combine zero checksum conversion with randomization");
if (cfg_family == PF_INET6) {
cfg_saddr6.sin6_port = htons(cfg_port_src);
cfg_daddr6.sin6_port = htons(cfg_port_dst);
if (inet_pton(cfg_family, daddr, &cfg_daddr6.sin6_addr) != 1)
error(1, errno, "Cannot parse ipv6 -D");
if (inet_pton(cfg_family, saddr, &cfg_saddr6.sin6_addr) != 1)
error(1, errno, "Cannot parse ipv6 -S");
} else {
cfg_saddr4.sin_port = htons(cfg_port_src);
cfg_daddr4.sin_port = htons(cfg_port_dst);
if (inet_pton(cfg_family, daddr, &cfg_daddr4.sin_addr) != 1)
error(1, errno, "Cannot parse ipv4 -D");
if (inet_pton(cfg_family, saddr, &cfg_saddr4.sin_addr) != 1)
error(1, errno, "Cannot parse ipv4 -S");
}
if (cfg_do_tx && cfg_random_seed) {
/* special case: time-based seed */
if (cfg_random_seed == 1)
cfg_random_seed = (unsigned int)gettimeofday_ms();
srand(cfg_random_seed);
fprintf(stderr, "randomization seed: %u\n", cfg_random_seed);
}
}
static void do_tx(void)
{
static char _buf[MAX_HEADER_LEN + MAX_PAYLOAD_LEN];
char *buf;
int fd, len, i;
buf = build_packet(_buf, sizeof(_buf), &len);
if (cfg_send_pfpacket)
fd = open_packet();
else if (cfg_send_udp)
fd = open_inet(SOCK_DGRAM, 0);
else
fd = open_inet(SOCK_RAW, IPPROTO_RAW);
for (i = 0; i < cfg_num_pkt; i++) {
if (cfg_send_pfpacket)
send_packet(fd, buf, len);
else
send_inet(fd, buf, len);
/* randomize each packet individually to increase coverage */
if (cfg_random_seed) {
cfg_payload_len = rand() % MAX_PAYLOAD_LEN;
buf = build_packet(_buf, sizeof(_buf), &len);
}
}
if (close(fd))
error(1, errno, "close tx");
}
static void do_rx(int fdp, int fdr)
{
unsigned long count_udp = 0, count_pkt = 0;
long tleft, tstop;
struct pollfd pfd;
tstop = gettimeofday_ms() + cfg_timeout_ms;
tleft = cfg_timeout_ms;
do {
pfd.events = POLLIN;
pfd.fd = fdp;
if (poll(&pfd, 1, tleft) == -1)
error(1, errno, "poll");
if (pfd.revents & POLLIN)
count_pkt += recv_packet(fdp);
if (cfg_proto == IPPROTO_UDP)
count_udp += recv_udp(fdr);
tleft = tstop - gettimeofday_ms();
} while (tleft > 0);
if (close(fdr))
error(1, errno, "close r");
if (close(fdp))
error(1, errno, "close p");
if (count_pkt < cfg_num_pkt)
error(1, 0, "rx: missing packets at pf_packet: %lu < %u",
count_pkt, cfg_num_pkt);
if (cfg_proto == IPPROTO_UDP) {
if (cfg_bad_csum && count_udp)
error(1, 0, "rx: unexpected packets at udp");
if (!cfg_bad_csum && !count_udp)
error(1, 0, "rx: missing packets at udp");
}
}
int main(int argc, char *const argv[])
{
int fdp = -1, fdr = -1; /* -1 to silence -Wmaybe-uninitialized */
parse_args(argc, argv);
/* open receive sockets before transmitting */
if (cfg_do_rx) {
fdp = recv_prepare_packet();
fdr = recv_prepare_udp();
}
if (cfg_do_tx)
do_tx();
if (cfg_do_rx)
do_rx(fdp, fdr);
fprintf(stderr, "OK\n");
return 0;
}
| linux-master | tools/testing/selftests/net/csum.c |
// SPDX-License-Identifier: GPL-2.0 OR BSD-3-Clause
// Copyright (c) 2023 Cloudflare
/* Test IP_LOCAL_PORT_RANGE socket option: IPv4 + IPv6, TCP + UDP.
*
* Tests assume that net.ipv4.ip_local_port_range is [40000, 49999].
* Don't run these directly but with ip_local_port_range.sh script.
*/
#include <fcntl.h>
#include <netinet/ip.h>
#include "../kselftest_harness.h"
#ifndef IP_LOCAL_PORT_RANGE
#define IP_LOCAL_PORT_RANGE 51
#endif
static __u32 pack_port_range(__u16 lo, __u16 hi)
{
return (hi << 16) | (lo << 0);
}
static void unpack_port_range(__u32 range, __u16 *lo, __u16 *hi)
{
*lo = range & 0xffff;
*hi = range >> 16;
}
static int get_so_domain(int fd)
{
int domain, err;
socklen_t len;
len = sizeof(domain);
err = getsockopt(fd, SOL_SOCKET, SO_DOMAIN, &domain, &len);
if (err)
return -1;
return domain;
}
static int bind_to_loopback_any_port(int fd)
{
union {
struct sockaddr sa;
struct sockaddr_in v4;
struct sockaddr_in6 v6;
} addr;
socklen_t addr_len;
memset(&addr, 0, sizeof(addr));
switch (get_so_domain(fd)) {
case AF_INET:
addr.v4.sin_family = AF_INET;
addr.v4.sin_port = htons(0);
addr.v4.sin_addr.s_addr = htonl(INADDR_LOOPBACK);
addr_len = sizeof(addr.v4);
break;
case AF_INET6:
addr.v6.sin6_family = AF_INET6;
addr.v6.sin6_port = htons(0);
addr.v6.sin6_addr = in6addr_loopback;
addr_len = sizeof(addr.v6);
break;
default:
return -1;
}
return bind(fd, &addr.sa, addr_len);
}
static int get_sock_port(int fd)
{
union {
struct sockaddr sa;
struct sockaddr_in v4;
struct sockaddr_in6 v6;
} addr;
socklen_t addr_len;
int err;
addr_len = sizeof(addr);
memset(&addr, 0, sizeof(addr));
err = getsockname(fd, &addr.sa, &addr_len);
if (err)
return -1;
switch (addr.sa.sa_family) {
case AF_INET:
return ntohs(addr.v4.sin_port);
case AF_INET6:
return ntohs(addr.v6.sin6_port);
default:
errno = EAFNOSUPPORT;
return -1;
}
}
static int get_ip_local_port_range(int fd, __u32 *range)
{
socklen_t len;
__u32 val;
int err;
len = sizeof(val);
err = getsockopt(fd, SOL_IP, IP_LOCAL_PORT_RANGE, &val, &len);
if (err)
return -1;
*range = val;
return 0;
}
FIXTURE(ip_local_port_range) {};
FIXTURE_SETUP(ip_local_port_range)
{
}
FIXTURE_TEARDOWN(ip_local_port_range)
{
}
FIXTURE_VARIANT(ip_local_port_range) {
int so_domain;
int so_type;
int so_protocol;
};
FIXTURE_VARIANT_ADD(ip_local_port_range, ip4_tcp) {
.so_domain = AF_INET,
.so_type = SOCK_STREAM,
.so_protocol = 0,
};
FIXTURE_VARIANT_ADD(ip_local_port_range, ip4_udp) {
.so_domain = AF_INET,
.so_type = SOCK_DGRAM,
.so_protocol = 0,
};
FIXTURE_VARIANT_ADD(ip_local_port_range, ip4_stcp) {
.so_domain = AF_INET,
.so_type = SOCK_STREAM,
.so_protocol = IPPROTO_SCTP,
};
FIXTURE_VARIANT_ADD(ip_local_port_range, ip6_tcp) {
.so_domain = AF_INET6,
.so_type = SOCK_STREAM,
.so_protocol = 0,
};
FIXTURE_VARIANT_ADD(ip_local_port_range, ip6_udp) {
.so_domain = AF_INET6,
.so_type = SOCK_DGRAM,
.so_protocol = 0,
};
FIXTURE_VARIANT_ADD(ip_local_port_range, ip6_stcp) {
.so_domain = AF_INET6,
.so_type = SOCK_STREAM,
.so_protocol = IPPROTO_SCTP,
};
TEST_F(ip_local_port_range, invalid_option_value)
{
__u16 val16;
__u32 val32;
__u64 val64;
int fd, err;
fd = socket(variant->so_domain, variant->so_type, variant->so_protocol);
ASSERT_GE(fd, 0) TH_LOG("socket failed");
/* Too few bytes */
val16 = 40000;
err = setsockopt(fd, SOL_IP, IP_LOCAL_PORT_RANGE, &val16, sizeof(val16));
EXPECT_TRUE(err) TH_LOG("expected setsockopt(IP_LOCAL_PORT_RANGE) to fail");
EXPECT_EQ(errno, EINVAL);
/* Empty range: low port > high port */
val32 = pack_port_range(40222, 40111);
err = setsockopt(fd, SOL_IP, IP_LOCAL_PORT_RANGE, &val32, sizeof(val32));
EXPECT_TRUE(err) TH_LOG("expected setsockopt(IP_LOCAL_PORT_RANGE) to fail");
EXPECT_EQ(errno, EINVAL);
/* Too many bytes */
val64 = pack_port_range(40333, 40444);
err = setsockopt(fd, SOL_IP, IP_LOCAL_PORT_RANGE, &val64, sizeof(val64));
EXPECT_TRUE(err) TH_LOG("expected setsockopt(IP_LOCAL_PORT_RANGE) to fail");
EXPECT_EQ(errno, EINVAL);
err = close(fd);
ASSERT_TRUE(!err) TH_LOG("close failed");
}
TEST_F(ip_local_port_range, port_range_out_of_netns_range)
{
const struct test {
__u16 range_lo;
__u16 range_hi;
} tests[] = {
{ 30000, 39999 }, /* socket range below netns range */
{ 50000, 59999 }, /* socket range above netns range */
};
const struct test *t;
for (t = tests; t < tests + ARRAY_SIZE(tests); t++) {
/* Bind a couple of sockets, not just one, to check
* that the range wasn't clamped to a single port from
* the netns range. That is [40000, 40000] or [49999,
* 49999], respectively for each test case.
*/
int fds[2], i;
TH_LOG("lo %5hu, hi %5hu", t->range_lo, t->range_hi);
for (i = 0; i < ARRAY_SIZE(fds); i++) {
int fd, err, port;
__u32 range;
fd = socket(variant->so_domain, variant->so_type, variant->so_protocol);
ASSERT_GE(fd, 0) TH_LOG("#%d: socket failed", i);
range = pack_port_range(t->range_lo, t->range_hi);
err = setsockopt(fd, SOL_IP, IP_LOCAL_PORT_RANGE, &range, sizeof(range));
ASSERT_TRUE(!err) TH_LOG("#%d: setsockopt(IP_LOCAL_PORT_RANGE) failed", i);
err = bind_to_loopback_any_port(fd);
ASSERT_TRUE(!err) TH_LOG("#%d: bind failed", i);
/* Check that socket port range outside of ephemeral range is ignored */
port = get_sock_port(fd);
ASSERT_GE(port, 40000) TH_LOG("#%d: expected port within netns range", i);
ASSERT_LE(port, 49999) TH_LOG("#%d: expected port within netns range", i);
fds[i] = fd;
}
for (i = 0; i < ARRAY_SIZE(fds); i++)
ASSERT_TRUE(close(fds[i]) == 0) TH_LOG("#%d: close failed", i);
}
}
TEST_F(ip_local_port_range, single_port_range)
{
const struct test {
__u16 range_lo;
__u16 range_hi;
__u16 expected;
} tests[] = {
/* single port range within ephemeral range */
{ 45000, 45000, 45000 },
/* first port in the ephemeral range (clamp from above) */
{ 0, 40000, 40000 },
/* last port in the ephemeral range (clamp from below) */
{ 49999, 0, 49999 },
};
const struct test *t;
for (t = tests; t < tests + ARRAY_SIZE(tests); t++) {
int fd, err, port;
__u32 range;
TH_LOG("lo %5hu, hi %5hu, expected %5hu",
t->range_lo, t->range_hi, t->expected);
fd = socket(variant->so_domain, variant->so_type, variant->so_protocol);
ASSERT_GE(fd, 0) TH_LOG("socket failed");
range = pack_port_range(t->range_lo, t->range_hi);
err = setsockopt(fd, SOL_IP, IP_LOCAL_PORT_RANGE, &range, sizeof(range));
ASSERT_TRUE(!err) TH_LOG("setsockopt(IP_LOCAL_PORT_RANGE) failed");
err = bind_to_loopback_any_port(fd);
ASSERT_TRUE(!err) TH_LOG("bind failed");
port = get_sock_port(fd);
ASSERT_EQ(port, t->expected) TH_LOG("unexpected local port");
err = close(fd);
ASSERT_TRUE(!err) TH_LOG("close failed");
}
}
TEST_F(ip_local_port_range, exhaust_8_port_range)
{
__u8 port_set = 0;
int i, fd, err;
__u32 range;
__u16 port;
int fds[8];
for (i = 0; i < ARRAY_SIZE(fds); i++) {
fd = socket(variant->so_domain, variant->so_type, variant->so_protocol);
ASSERT_GE(fd, 0) TH_LOG("socket failed");
range = pack_port_range(40000, 40007);
err = setsockopt(fd, SOL_IP, IP_LOCAL_PORT_RANGE, &range, sizeof(range));
ASSERT_TRUE(!err) TH_LOG("setsockopt(IP_LOCAL_PORT_RANGE) failed");
err = bind_to_loopback_any_port(fd);
ASSERT_TRUE(!err) TH_LOG("bind failed");
port = get_sock_port(fd);
ASSERT_GE(port, 40000) TH_LOG("expected port within sockopt range");
ASSERT_LE(port, 40007) TH_LOG("expected port within sockopt range");
port_set |= 1 << (port - 40000);
fds[i] = fd;
}
/* Check that all every port from the test range is in use */
ASSERT_EQ(port_set, 0xff) TH_LOG("expected all ports to be busy");
/* Check that bind() fails because the whole range is busy */
fd = socket(variant->so_domain, variant->so_type, variant->so_protocol);
ASSERT_GE(fd, 0) TH_LOG("socket failed");
range = pack_port_range(40000, 40007);
err = setsockopt(fd, SOL_IP, IP_LOCAL_PORT_RANGE, &range, sizeof(range));
ASSERT_TRUE(!err) TH_LOG("setsockopt(IP_LOCAL_PORT_RANGE) failed");
err = bind_to_loopback_any_port(fd);
ASSERT_TRUE(err) TH_LOG("expected bind to fail");
ASSERT_EQ(errno, EADDRINUSE);
err = close(fd);
ASSERT_TRUE(!err) TH_LOG("close failed");
for (i = 0; i < ARRAY_SIZE(fds); i++) {
err = close(fds[i]);
ASSERT_TRUE(!err) TH_LOG("close failed");
}
}
TEST_F(ip_local_port_range, late_bind)
{
union {
struct sockaddr sa;
struct sockaddr_in v4;
struct sockaddr_in6 v6;
} addr;
socklen_t addr_len;
const int one = 1;
int fd, err;
__u32 range;
__u16 port;
if (variant->so_protocol == IPPROTO_SCTP)
SKIP(return, "SCTP doesn't support IP_BIND_ADDRESS_NO_PORT");
fd = socket(variant->so_domain, variant->so_type, 0);
ASSERT_GE(fd, 0) TH_LOG("socket failed");
range = pack_port_range(40100, 40199);
err = setsockopt(fd, SOL_IP, IP_LOCAL_PORT_RANGE, &range, sizeof(range));
ASSERT_TRUE(!err) TH_LOG("setsockopt(IP_LOCAL_PORT_RANGE) failed");
err = setsockopt(fd, SOL_IP, IP_BIND_ADDRESS_NO_PORT, &one, sizeof(one));
ASSERT_TRUE(!err) TH_LOG("setsockopt(IP_BIND_ADDRESS_NO_PORT) failed");
err = bind_to_loopback_any_port(fd);
ASSERT_TRUE(!err) TH_LOG("bind failed");
port = get_sock_port(fd);
ASSERT_EQ(port, 0) TH_LOG("getsockname failed");
/* Invalid destination */
memset(&addr, 0, sizeof(addr));
switch (variant->so_domain) {
case AF_INET:
addr.v4.sin_family = AF_INET;
addr.v4.sin_port = htons(0);
addr.v4.sin_addr.s_addr = htonl(INADDR_ANY);
addr_len = sizeof(addr.v4);
break;
case AF_INET6:
addr.v6.sin6_family = AF_INET6;
addr.v6.sin6_port = htons(0);
addr.v6.sin6_addr = in6addr_any;
addr_len = sizeof(addr.v6);
break;
default:
ASSERT_TRUE(false) TH_LOG("unsupported socket domain");
}
/* connect() doesn't need to succeed for late bind to happen */
connect(fd, &addr.sa, addr_len);
port = get_sock_port(fd);
ASSERT_GE(port, 40100);
ASSERT_LE(port, 40199);
err = close(fd);
ASSERT_TRUE(!err) TH_LOG("close failed");
}
TEST_F(ip_local_port_range, get_port_range)
{
__u16 lo, hi;
__u32 range;
int fd, err;
fd = socket(variant->so_domain, variant->so_type, variant->so_protocol);
ASSERT_GE(fd, 0) TH_LOG("socket failed");
/* Get range before it will be set */
err = get_ip_local_port_range(fd, &range);
ASSERT_TRUE(!err) TH_LOG("getsockopt(IP_LOCAL_PORT_RANGE) failed");
unpack_port_range(range, &lo, &hi);
ASSERT_EQ(lo, 0) TH_LOG("unexpected low port");
ASSERT_EQ(hi, 0) TH_LOG("unexpected high port");
range = pack_port_range(12345, 54321);
err = setsockopt(fd, SOL_IP, IP_LOCAL_PORT_RANGE, &range, sizeof(range));
ASSERT_TRUE(!err) TH_LOG("setsockopt(IP_LOCAL_PORT_RANGE) failed");
/* Get range after it has been set */
err = get_ip_local_port_range(fd, &range);
ASSERT_TRUE(!err) TH_LOG("getsockopt(IP_LOCAL_PORT_RANGE) failed");
unpack_port_range(range, &lo, &hi);
ASSERT_EQ(lo, 12345) TH_LOG("unexpected low port");
ASSERT_EQ(hi, 54321) TH_LOG("unexpected high port");
/* Unset the port range */
range = pack_port_range(0, 0);
err = setsockopt(fd, SOL_IP, IP_LOCAL_PORT_RANGE, &range, sizeof(range));
ASSERT_TRUE(!err) TH_LOG("setsockopt(IP_LOCAL_PORT_RANGE) failed");
/* Get range after it has been unset */
err = get_ip_local_port_range(fd, &range);
ASSERT_TRUE(!err) TH_LOG("getsockopt(IP_LOCAL_PORT_RANGE) failed");
unpack_port_range(range, &lo, &hi);
ASSERT_EQ(lo, 0) TH_LOG("unexpected low port");
ASSERT_EQ(hi, 0) TH_LOG("unexpected high port");
err = close(fd);
ASSERT_TRUE(!err) TH_LOG("close failed");
}
TEST_HARNESS_MAIN
| linux-master | tools/testing/selftests/net/ip_local_port_range.c |
// SPDX-License-Identifier: GPL-2.0-only
/*
* Copyright 2018 Google Inc.
* Author: Soheil Hassas Yeganeh ([email protected])
*
* Simple example on how to use TCP_INQ and TCP_CM_INQ.
*/
#define _GNU_SOURCE
#include <error.h>
#include <netinet/in.h>
#include <netinet/tcp.h>
#include <pthread.h>
#include <stdio.h>
#include <errno.h>
#include <stdlib.h>
#include <string.h>
#include <sys/socket.h>
#include <unistd.h>
#ifndef TCP_INQ
#define TCP_INQ 36
#endif
#ifndef TCP_CM_INQ
#define TCP_CM_INQ TCP_INQ
#endif
#define BUF_SIZE 8192
#define CMSG_SIZE 32
static int family = AF_INET6;
static socklen_t addr_len = sizeof(struct sockaddr_in6);
static int port = 4974;
static void setup_loopback_addr(int family, struct sockaddr_storage *sockaddr)
{
struct sockaddr_in6 *addr6 = (void *) sockaddr;
struct sockaddr_in *addr4 = (void *) sockaddr;
switch (family) {
case PF_INET:
memset(addr4, 0, sizeof(*addr4));
addr4->sin_family = AF_INET;
addr4->sin_addr.s_addr = htonl(INADDR_LOOPBACK);
addr4->sin_port = htons(port);
break;
case PF_INET6:
memset(addr6, 0, sizeof(*addr6));
addr6->sin6_family = AF_INET6;
addr6->sin6_addr = in6addr_loopback;
addr6->sin6_port = htons(port);
break;
default:
error(1, 0, "illegal family");
}
}
void *start_server(void *arg)
{
int server_fd = (int)(unsigned long)arg;
struct sockaddr_in addr;
socklen_t addrlen = sizeof(addr);
char *buf;
int fd;
int r;
buf = malloc(BUF_SIZE);
for (;;) {
fd = accept(server_fd, (struct sockaddr *)&addr, &addrlen);
if (fd == -1) {
perror("accept");
break;
}
do {
r = send(fd, buf, BUF_SIZE, 0);
} while (r < 0 && errno == EINTR);
if (r < 0)
perror("send");
if (r != BUF_SIZE)
fprintf(stderr, "can only send %d bytes\n", r);
/* TCP_INQ can overestimate in-queue by one byte if we send
* the FIN packet. Sleep for 1 second, so that the client
* likely invoked recvmsg().
*/
sleep(1);
close(fd);
}
free(buf);
close(server_fd);
pthread_exit(0);
}
int main(int argc, char *argv[])
{
struct sockaddr_storage listen_addr, addr;
int c, one = 1, inq = -1;
pthread_t server_thread;
char cmsgbuf[CMSG_SIZE];
struct iovec iov[1];
struct cmsghdr *cm;
struct msghdr msg;
int server_fd, fd;
char *buf;
while ((c = getopt(argc, argv, "46p:")) != -1) {
switch (c) {
case '4':
family = PF_INET;
addr_len = sizeof(struct sockaddr_in);
break;
case '6':
family = PF_INET6;
addr_len = sizeof(struct sockaddr_in6);
break;
case 'p':
port = atoi(optarg);
break;
}
}
server_fd = socket(family, SOCK_STREAM, 0);
if (server_fd < 0)
error(1, errno, "server socket");
setup_loopback_addr(family, &listen_addr);
if (setsockopt(server_fd, SOL_SOCKET, SO_REUSEADDR,
&one, sizeof(one)) != 0)
error(1, errno, "setsockopt(SO_REUSEADDR)");
if (bind(server_fd, (const struct sockaddr *)&listen_addr,
addr_len) == -1)
error(1, errno, "bind");
if (listen(server_fd, 128) == -1)
error(1, errno, "listen");
if (pthread_create(&server_thread, NULL, start_server,
(void *)(unsigned long)server_fd) != 0)
error(1, errno, "pthread_create");
fd = socket(family, SOCK_STREAM, 0);
if (fd < 0)
error(1, errno, "client socket");
setup_loopback_addr(family, &addr);
if (connect(fd, (const struct sockaddr *)&addr, addr_len) == -1)
error(1, errno, "connect");
if (setsockopt(fd, SOL_TCP, TCP_INQ, &one, sizeof(one)) != 0)
error(1, errno, "setsockopt(TCP_INQ)");
msg.msg_name = NULL;
msg.msg_namelen = 0;
msg.msg_iov = iov;
msg.msg_iovlen = 1;
msg.msg_control = cmsgbuf;
msg.msg_controllen = sizeof(cmsgbuf);
msg.msg_flags = 0;
buf = malloc(BUF_SIZE);
iov[0].iov_base = buf;
iov[0].iov_len = BUF_SIZE / 2;
if (recvmsg(fd, &msg, 0) != iov[0].iov_len)
error(1, errno, "recvmsg");
if (msg.msg_flags & MSG_CTRUNC)
error(1, 0, "control message is truncated");
for (cm = CMSG_FIRSTHDR(&msg); cm; cm = CMSG_NXTHDR(&msg, cm))
if (cm->cmsg_level == SOL_TCP && cm->cmsg_type == TCP_CM_INQ)
inq = *((int *) CMSG_DATA(cm));
if (inq != BUF_SIZE - iov[0].iov_len) {
fprintf(stderr, "unexpected inq: %d\n", inq);
exit(1);
}
printf("PASSED\n");
free(buf);
close(fd);
return 0;
}
| linux-master | tools/testing/selftests/net/tcp_inq.c |
// SPDX-License-Identifier: GPL-2.0
/* Test IPV6_FLOWINFO cmsg on send and recv */
#define _GNU_SOURCE
#include <arpa/inet.h>
#include <asm/byteorder.h>
#include <error.h>
#include <errno.h>
#include <fcntl.h>
#include <limits.h>
#include <linux/icmpv6.h>
#include <linux/in6.h>
#include <stdbool.h>
#include <stdio.h>
#include <stdint.h>
#include <stdlib.h>
#include <string.h>
#include <sys/socket.h>
#include <sys/stat.h>
#include <sys/time.h>
#include <sys/types.h>
#include <unistd.h>
/* uapi/glibc weirdness may leave this undefined */
#ifndef IPV6_FLOWINFO
#define IPV6_FLOWINFO 11
#endif
#ifndef IPV6_FLOWLABEL_MGR
#define IPV6_FLOWLABEL_MGR 32
#endif
#ifndef IPV6_FLOWINFO_SEND
#define IPV6_FLOWINFO_SEND 33
#endif
#define FLOWLABEL_WILDCARD ((uint32_t) -1)
static const char cfg_data[] = "a";
static uint32_t cfg_label = 1;
static bool use_ping;
static bool use_flowinfo_send;
static struct icmp6hdr icmp6 = {
.icmp6_type = ICMPV6_ECHO_REQUEST
};
static struct sockaddr_in6 addr = {
.sin6_family = AF_INET6,
.sin6_addr = IN6ADDR_LOOPBACK_INIT,
};
static void do_send(int fd, bool with_flowlabel, uint32_t flowlabel)
{
char control[CMSG_SPACE(sizeof(flowlabel))] = {0};
struct msghdr msg = {0};
struct iovec iov = {
.iov_base = (char *)cfg_data,
.iov_len = sizeof(cfg_data)
};
int ret;
if (use_ping) {
iov.iov_base = &icmp6;
iov.iov_len = sizeof(icmp6);
}
msg.msg_iov = &iov;
msg.msg_iovlen = 1;
if (use_flowinfo_send) {
msg.msg_name = &addr;
msg.msg_namelen = sizeof(addr);
} else if (with_flowlabel) {
struct cmsghdr *cm;
cm = (void *)control;
cm->cmsg_len = CMSG_LEN(sizeof(flowlabel));
cm->cmsg_level = SOL_IPV6;
cm->cmsg_type = IPV6_FLOWINFO;
*(uint32_t *)CMSG_DATA(cm) = htonl(flowlabel);
msg.msg_control = control;
msg.msg_controllen = sizeof(control);
}
ret = sendmsg(fd, &msg, 0);
if (ret == -1)
error(1, errno, "send");
if (with_flowlabel)
fprintf(stderr, "sent with label %u\n", flowlabel);
else
fprintf(stderr, "sent without label\n");
}
static void do_recv(int fd, bool with_flowlabel, uint32_t expect)
{
char control[CMSG_SPACE(sizeof(expect))];
char data[sizeof(cfg_data)];
struct msghdr msg = {0};
struct iovec iov = {0};
struct cmsghdr *cm;
uint32_t flowlabel;
int ret;
iov.iov_base = data;
iov.iov_len = sizeof(data);
msg.msg_iov = &iov;
msg.msg_iovlen = 1;
memset(control, 0, sizeof(control));
msg.msg_control = control;
msg.msg_controllen = sizeof(control);
ret = recvmsg(fd, &msg, 0);
if (ret == -1)
error(1, errno, "recv");
if (use_ping)
goto parse_cmsg;
if (msg.msg_flags & (MSG_TRUNC | MSG_CTRUNC))
error(1, 0, "recv: truncated");
if (ret != sizeof(cfg_data))
error(1, 0, "recv: length mismatch");
if (memcmp(data, cfg_data, sizeof(data)))
error(1, 0, "recv: data mismatch");
parse_cmsg:
cm = CMSG_FIRSTHDR(&msg);
if (with_flowlabel) {
if (!cm)
error(1, 0, "recv: missing cmsg");
if (CMSG_NXTHDR(&msg, cm))
error(1, 0, "recv: too many cmsg");
if (cm->cmsg_level != SOL_IPV6 ||
cm->cmsg_type != IPV6_FLOWINFO)
error(1, 0, "recv: unexpected cmsg level or type");
flowlabel = ntohl(*(uint32_t *)CMSG_DATA(cm));
fprintf(stderr, "recv with label %u\n", flowlabel);
if (expect != FLOWLABEL_WILDCARD && expect != flowlabel) {
fprintf(stderr, "recv: incorrect flowlabel %u != %u\n",
flowlabel, expect);
error(1, 0, "recv: flowlabel is wrong");
}
} else {
fprintf(stderr, "recv without label\n");
}
}
static bool get_autoflowlabel_enabled(void)
{
int fd, ret;
char val;
fd = open("/proc/sys/net/ipv6/auto_flowlabels", O_RDONLY);
if (fd == -1)
error(1, errno, "open sysctl");
ret = read(fd, &val, 1);
if (ret == -1)
error(1, errno, "read sysctl");
if (ret == 0)
error(1, 0, "read sysctl: 0");
if (close(fd))
error(1, errno, "close sysctl");
return val == '1';
}
static void flowlabel_get(int fd, uint32_t label, uint8_t share, uint16_t flags)
{
struct in6_flowlabel_req req = {
.flr_action = IPV6_FL_A_GET,
.flr_label = htonl(label),
.flr_flags = flags,
.flr_share = share,
};
/* do not pass IPV6_ADDR_ANY or IPV6_ADDR_MAPPED */
req.flr_dst.s6_addr[0] = 0xfd;
req.flr_dst.s6_addr[15] = 0x1;
if (setsockopt(fd, SOL_IPV6, IPV6_FLOWLABEL_MGR, &req, sizeof(req)))
error(1, errno, "setsockopt flowlabel get");
}
static void parse_opts(int argc, char **argv)
{
int c;
while ((c = getopt(argc, argv, "l:ps")) != -1) {
switch (c) {
case 'l':
cfg_label = strtoul(optarg, NULL, 0);
break;
case 'p':
use_ping = true;
break;
case 's':
use_flowinfo_send = true;
break;
default:
error(1, 0, "%s: parse error", argv[0]);
}
}
}
int main(int argc, char **argv)
{
const int one = 1;
int fdt, fdr;
int prot = 0;
addr.sin6_port = htons(8000);
parse_opts(argc, argv);
if (use_ping) {
fprintf(stderr, "attempting to use ping sockets\n");
prot = IPPROTO_ICMPV6;
}
fdt = socket(PF_INET6, SOCK_DGRAM, prot);
if (fdt == -1)
error(1, errno, "socket t");
fdr = use_ping ? fdt : socket(PF_INET6, SOCK_DGRAM, 0);
if (fdr == -1)
error(1, errno, "socket r");
if (connect(fdt, (void *)&addr, sizeof(addr)))
error(1, errno, "connect");
if (!use_ping && bind(fdr, (void *)&addr, sizeof(addr)))
error(1, errno, "bind");
flowlabel_get(fdt, cfg_label, IPV6_FL_S_EXCL, IPV6_FL_F_CREATE);
if (setsockopt(fdr, SOL_IPV6, IPV6_FLOWINFO, &one, sizeof(one)))
error(1, errno, "setsockopt flowinfo");
if (get_autoflowlabel_enabled()) {
fprintf(stderr, "send no label: recv auto flowlabel\n");
do_send(fdt, false, 0);
do_recv(fdr, true, FLOWLABEL_WILDCARD);
} else {
fprintf(stderr, "send no label: recv no label (auto off)\n");
do_send(fdt, false, 0);
do_recv(fdr, false, 0);
}
if (use_flowinfo_send) {
fprintf(stderr, "using IPV6_FLOWINFO_SEND to send label\n");
addr.sin6_flowinfo = htonl(cfg_label);
if (setsockopt(fdt, SOL_IPV6, IPV6_FLOWINFO_SEND, &one,
sizeof(one)) == -1)
error(1, errno, "setsockopt flowinfo_send");
}
fprintf(stderr, "send label\n");
do_send(fdt, true, cfg_label);
do_recv(fdr, true, cfg_label);
if (close(fdr))
error(1, errno, "close r");
if (!use_ping && close(fdt))
error(1, errno, "close t");
return 0;
}
| linux-master | tools/testing/selftests/net/ipv6_flowlabel.c |
// SPDX-License-Identifier: GPL-2.0
#define _GNU_SOURCE
#include <arpa/inet.h>
#include <error.h>
#include <errno.h>
#include <limits.h>
#include <linux/errqueue.h>
#include <linux/if_packet.h>
#include <linux/socket.h>
#include <linux/sockios.h>
#include <net/ethernet.h>
#include <net/if.h>
#include <netinet/ip.h>
#include <netinet/ip6.h>
#include <netinet/tcp.h>
#include <netinet/udp.h>
#include <poll.h>
#include <sched.h>
#include <stdbool.h>
#include <stdio.h>
#include <stdint.h>
#include <stdlib.h>
#include <string.h>
#include <sys/ioctl.h>
#include <sys/socket.h>
#include <sys/stat.h>
#include <sys/time.h>
#include <sys/types.h>
#include <sys/wait.h>
#include <unistd.h>
#ifndef UDP_GRO
#define UDP_GRO 104
#endif
static int cfg_port = 8000;
static bool cfg_tcp;
static bool cfg_verify;
static bool cfg_read_all;
static bool cfg_gro_segment;
static int cfg_family = PF_INET6;
static int cfg_alen = sizeof(struct sockaddr_in6);
static int cfg_expected_pkt_nr;
static int cfg_expected_pkt_len;
static int cfg_expected_gso_size;
static int cfg_connect_timeout_ms;
static int cfg_rcv_timeout_ms;
static struct sockaddr_storage cfg_bind_addr;
static bool interrupted;
static unsigned long packets, bytes;
static void sigint_handler(int signum)
{
if (signum == SIGINT)
interrupted = true;
}
static void setup_sockaddr(int domain, const char *str_addr, void *sockaddr)
{
struct sockaddr_in6 *addr6 = (void *) sockaddr;
struct sockaddr_in *addr4 = (void *) sockaddr;
switch (domain) {
case PF_INET:
addr4->sin_family = AF_INET;
addr4->sin_port = htons(cfg_port);
if (inet_pton(AF_INET, str_addr, &(addr4->sin_addr)) != 1)
error(1, 0, "ipv4 parse error: %s", str_addr);
break;
case PF_INET6:
addr6->sin6_family = AF_INET6;
addr6->sin6_port = htons(cfg_port);
if (inet_pton(AF_INET6, str_addr, &(addr6->sin6_addr)) != 1)
error(1, 0, "ipv6 parse error: %s", str_addr);
break;
default:
error(1, 0, "illegal domain");
}
}
static unsigned long gettimeofday_ms(void)
{
struct timeval tv;
gettimeofday(&tv, NULL);
return (tv.tv_sec * 1000) + (tv.tv_usec / 1000);
}
static void do_poll(int fd, int timeout_ms)
{
struct pollfd pfd;
int ret;
pfd.events = POLLIN;
pfd.revents = 0;
pfd.fd = fd;
do {
ret = poll(&pfd, 1, 10);
if (interrupted)
break;
if (ret == -1)
error(1, errno, "poll");
if (ret == 0) {
if (!timeout_ms)
continue;
timeout_ms -= 10;
if (timeout_ms <= 0) {
interrupted = true;
break;
}
/* no events and more time to wait, do poll again */
continue;
}
if (pfd.revents != POLLIN)
error(1, errno, "poll: 0x%x expected 0x%x\n",
pfd.revents, POLLIN);
} while (!ret);
}
static int do_socket(bool do_tcp)
{
int fd, val;
fd = socket(cfg_family, cfg_tcp ? SOCK_STREAM : SOCK_DGRAM, 0);
if (fd == -1)
error(1, errno, "socket");
val = 1 << 21;
if (setsockopt(fd, SOL_SOCKET, SO_RCVBUF, &val, sizeof(val)))
error(1, errno, "setsockopt rcvbuf");
val = 1;
if (setsockopt(fd, SOL_SOCKET, SO_REUSEPORT, &val, sizeof(val)))
error(1, errno, "setsockopt reuseport");
if (bind(fd, (void *)&cfg_bind_addr, cfg_alen))
error(1, errno, "bind");
if (do_tcp) {
int accept_fd = fd;
if (listen(accept_fd, 1))
error(1, errno, "listen");
do_poll(accept_fd, cfg_connect_timeout_ms);
if (interrupted)
exit(0);
fd = accept(accept_fd, NULL, NULL);
if (fd == -1)
error(1, errno, "accept");
if (close(accept_fd))
error(1, errno, "close accept fd");
}
return fd;
}
/* Flush all outstanding bytes for the tcp receive queue */
static void do_flush_tcp(int fd)
{
int ret;
while (true) {
/* MSG_TRUNC flushes up to len bytes */
ret = recv(fd, NULL, 1 << 21, MSG_TRUNC | MSG_DONTWAIT);
if (ret == -1 && errno == EAGAIN)
return;
if (ret == -1)
error(1, errno, "flush");
if (ret == 0) {
/* client detached */
exit(0);
}
packets++;
bytes += ret;
}
}
static char sanitized_char(char val)
{
return (val >= 'a' && val <= 'z') ? val : '.';
}
static void do_verify_udp(const char *data, int len)
{
char cur = data[0];
int i;
/* verify contents */
if (cur < 'a' || cur > 'z')
error(1, 0, "data initial byte out of range");
for (i = 1; i < len; i++) {
if (cur == 'z')
cur = 'a';
else
cur++;
if (data[i] != cur)
error(1, 0, "data[%d]: len %d, %c(%hhu) != %c(%hhu)\n",
i, len,
sanitized_char(data[i]), data[i],
sanitized_char(cur), cur);
}
}
static int recv_msg(int fd, char *buf, int len, int *gso_size)
{
char control[CMSG_SPACE(sizeof(int))] = {0};
struct msghdr msg = {0};
struct iovec iov = {0};
struct cmsghdr *cmsg;
int ret;
iov.iov_base = buf;
iov.iov_len = len;
msg.msg_iov = &iov;
msg.msg_iovlen = 1;
msg.msg_control = control;
msg.msg_controllen = sizeof(control);
*gso_size = -1;
ret = recvmsg(fd, &msg, MSG_TRUNC | MSG_DONTWAIT);
if (ret != -1) {
for (cmsg = CMSG_FIRSTHDR(&msg); cmsg != NULL;
cmsg = CMSG_NXTHDR(&msg, cmsg)) {
if (cmsg->cmsg_level == SOL_UDP
&& cmsg->cmsg_type == UDP_GRO) {
*gso_size = *(int *)CMSG_DATA(cmsg);
break;
}
}
}
return ret;
}
/* Flush all outstanding datagrams. Verify first few bytes of each. */
static void do_flush_udp(int fd)
{
static char rbuf[ETH_MAX_MTU];
int ret, len, gso_size = 0, budget = 256;
len = cfg_read_all ? sizeof(rbuf) : 0;
while (budget--) {
/* MSG_TRUNC will make return value full datagram length */
if (!cfg_expected_gso_size)
ret = recv(fd, rbuf, len, MSG_TRUNC | MSG_DONTWAIT);
else
ret = recv_msg(fd, rbuf, len, &gso_size);
if (ret == -1 && errno == EAGAIN)
break;
if (ret == -1)
error(1, errno, "recv");
if (cfg_expected_pkt_len && ret != cfg_expected_pkt_len)
error(1, 0, "recv: bad packet len, got %d,"
" expected %d\n", ret, cfg_expected_pkt_len);
if (len && cfg_verify) {
if (ret == 0)
error(1, errno, "recv: 0 byte datagram\n");
do_verify_udp(rbuf, ret);
}
if (cfg_expected_gso_size && cfg_expected_gso_size != gso_size)
error(1, 0, "recv: bad gso size, got %d, expected %d "
"(-1 == no gso cmsg))\n", gso_size,
cfg_expected_gso_size);
packets++;
bytes += ret;
if (cfg_expected_pkt_nr && packets >= cfg_expected_pkt_nr)
break;
}
}
static void usage(const char *filepath)
{
error(1, 0, "Usage: %s [-C connect_timeout] [-Grtv] [-b addr] [-p port]"
" [-l pktlen] [-n packetnr] [-R rcv_timeout] [-S gsosize]",
filepath);
}
static void parse_opts(int argc, char **argv)
{
const char *bind_addr = NULL;
int c;
while ((c = getopt(argc, argv, "4b:C:Gl:n:p:rR:S:tv")) != -1) {
switch (c) {
case '4':
cfg_family = PF_INET;
cfg_alen = sizeof(struct sockaddr_in);
break;
case 'b':
bind_addr = optarg;
break;
case 'C':
cfg_connect_timeout_ms = strtoul(optarg, NULL, 0);
break;
case 'G':
cfg_gro_segment = true;
break;
case 'l':
cfg_expected_pkt_len = strtoul(optarg, NULL, 0);
break;
case 'n':
cfg_expected_pkt_nr = strtoul(optarg, NULL, 0);
break;
case 'p':
cfg_port = strtoul(optarg, NULL, 0);
break;
case 'r':
cfg_read_all = true;
break;
case 'R':
cfg_rcv_timeout_ms = strtoul(optarg, NULL, 0);
break;
case 'S':
cfg_expected_gso_size = strtol(optarg, NULL, 0);
break;
case 't':
cfg_tcp = true;
break;
case 'v':
cfg_verify = true;
cfg_read_all = true;
break;
default:
exit(1);
}
}
if (!bind_addr)
bind_addr = cfg_family == PF_INET6 ? "::" : "0.0.0.0";
setup_sockaddr(cfg_family, bind_addr, &cfg_bind_addr);
if (optind != argc)
usage(argv[0]);
if (cfg_tcp && cfg_verify)
error(1, 0, "TODO: implement verify mode for tcp");
}
static void do_recv(void)
{
int timeout_ms = cfg_tcp ? cfg_rcv_timeout_ms : cfg_connect_timeout_ms;
unsigned long tnow, treport;
int fd;
fd = do_socket(cfg_tcp);
if (cfg_gro_segment && !cfg_tcp) {
int val = 1;
if (setsockopt(fd, IPPROTO_UDP, UDP_GRO, &val, sizeof(val)))
error(1, errno, "setsockopt UDP_GRO");
}
treport = gettimeofday_ms() + 1000;
do {
do_poll(fd, timeout_ms);
if (cfg_tcp)
do_flush_tcp(fd);
else
do_flush_udp(fd);
tnow = gettimeofday_ms();
if (tnow > treport) {
if (packets)
fprintf(stderr,
"%s rx: %6lu MB/s %8lu calls/s\n",
cfg_tcp ? "tcp" : "udp",
bytes >> 20, packets);
bytes = packets = 0;
treport = tnow + 1000;
}
timeout_ms = cfg_rcv_timeout_ms;
} while (!interrupted);
if (cfg_expected_pkt_nr && (packets != cfg_expected_pkt_nr))
error(1, 0, "wrong packet number! got %ld, expected %d\n",
packets, cfg_expected_pkt_nr);
if (close(fd))
error(1, errno, "close");
}
int main(int argc, char **argv)
{
parse_opts(argc, argv);
signal(SIGINT, sigint_handler);
do_recv();
return 0;
}
| linux-master | tools/testing/selftests/net/udpgso_bench_rx.c |
// SPDX-License-Identifier: GPL-2.0
/*
* Test functionality of BPF filters with SO_REUSEPORT. Same test as
* in reuseport_bpf_cpu, only as one socket per NUMA node.
*/
#define _GNU_SOURCE
#include <arpa/inet.h>
#include <errno.h>
#include <error.h>
#include <linux/filter.h>
#include <linux/bpf.h>
#include <linux/in.h>
#include <linux/unistd.h>
#include <sched.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/epoll.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <unistd.h>
#include <numa.h>
#include "../kselftest.h"
static const int PORT = 8888;
static void build_rcv_group(int *rcv_fd, size_t len, int family, int proto)
{
struct sockaddr_storage addr;
struct sockaddr_in *addr4;
struct sockaddr_in6 *addr6;
size_t i;
int opt;
switch (family) {
case AF_INET:
addr4 = (struct sockaddr_in *)&addr;
addr4->sin_family = AF_INET;
addr4->sin_addr.s_addr = htonl(INADDR_ANY);
addr4->sin_port = htons(PORT);
break;
case AF_INET6:
addr6 = (struct sockaddr_in6 *)&addr;
addr6->sin6_family = AF_INET6;
addr6->sin6_addr = in6addr_any;
addr6->sin6_port = htons(PORT);
break;
default:
error(1, 0, "Unsupported family %d", family);
}
for (i = 0; i < len; ++i) {
rcv_fd[i] = socket(family, proto, 0);
if (rcv_fd[i] < 0)
error(1, errno, "failed to create receive socket");
opt = 1;
if (setsockopt(rcv_fd[i], SOL_SOCKET, SO_REUSEPORT, &opt,
sizeof(opt)))
error(1, errno, "failed to set SO_REUSEPORT");
if (bind(rcv_fd[i], (struct sockaddr *)&addr, sizeof(addr)))
error(1, errno, "failed to bind receive socket");
if (proto == SOCK_STREAM && listen(rcv_fd[i], len * 10))
error(1, errno, "failed to listen on receive port");
}
}
static void attach_bpf(int fd)
{
static char bpf_log_buf[65536];
static const char bpf_license[] = "";
int bpf_fd;
const struct bpf_insn prog[] = {
/* R0 = bpf_get_numa_node_id() */
{ BPF_JMP | BPF_CALL, 0, 0, 0, BPF_FUNC_get_numa_node_id },
/* return R0 */
{ BPF_JMP | BPF_EXIT, 0, 0, 0, 0 }
};
union bpf_attr attr;
memset(&attr, 0, sizeof(attr));
attr.prog_type = BPF_PROG_TYPE_SOCKET_FILTER;
attr.insn_cnt = ARRAY_SIZE(prog);
attr.insns = (unsigned long) &prog;
attr.license = (unsigned long) &bpf_license;
attr.log_buf = (unsigned long) &bpf_log_buf;
attr.log_size = sizeof(bpf_log_buf);
attr.log_level = 1;
bpf_fd = syscall(__NR_bpf, BPF_PROG_LOAD, &attr, sizeof(attr));
if (bpf_fd < 0)
error(1, errno, "ebpf error. log:\n%s\n", bpf_log_buf);
if (setsockopt(fd, SOL_SOCKET, SO_ATTACH_REUSEPORT_EBPF, &bpf_fd,
sizeof(bpf_fd)))
error(1, errno, "failed to set SO_ATTACH_REUSEPORT_EBPF");
close(bpf_fd);
}
static void send_from_node(int node_id, int family, int proto)
{
struct sockaddr_storage saddr, daddr;
struct sockaddr_in *saddr4, *daddr4;
struct sockaddr_in6 *saddr6, *daddr6;
int fd;
switch (family) {
case AF_INET:
saddr4 = (struct sockaddr_in *)&saddr;
saddr4->sin_family = AF_INET;
saddr4->sin_addr.s_addr = htonl(INADDR_ANY);
saddr4->sin_port = 0;
daddr4 = (struct sockaddr_in *)&daddr;
daddr4->sin_family = AF_INET;
daddr4->sin_addr.s_addr = htonl(INADDR_LOOPBACK);
daddr4->sin_port = htons(PORT);
break;
case AF_INET6:
saddr6 = (struct sockaddr_in6 *)&saddr;
saddr6->sin6_family = AF_INET6;
saddr6->sin6_addr = in6addr_any;
saddr6->sin6_port = 0;
daddr6 = (struct sockaddr_in6 *)&daddr;
daddr6->sin6_family = AF_INET6;
daddr6->sin6_addr = in6addr_loopback;
daddr6->sin6_port = htons(PORT);
break;
default:
error(1, 0, "Unsupported family %d", family);
}
if (numa_run_on_node(node_id) < 0)
error(1, errno, "failed to pin to node");
fd = socket(family, proto, 0);
if (fd < 0)
error(1, errno, "failed to create send socket");
if (bind(fd, (struct sockaddr *)&saddr, sizeof(saddr)))
error(1, errno, "failed to bind send socket");
if (connect(fd, (struct sockaddr *)&daddr, sizeof(daddr)))
error(1, errno, "failed to connect send socket");
if (send(fd, "a", 1, 0) < 0)
error(1, errno, "failed to send message");
close(fd);
}
static
void receive_on_node(int *rcv_fd, int len, int epfd, int node_id, int proto)
{
struct epoll_event ev;
int i, fd;
char buf[8];
i = epoll_wait(epfd, &ev, 1, -1);
if (i < 0)
error(1, errno, "epoll_wait failed");
if (proto == SOCK_STREAM) {
fd = accept(ev.data.fd, NULL, NULL);
if (fd < 0)
error(1, errno, "failed to accept");
i = recv(fd, buf, sizeof(buf), 0);
close(fd);
} else {
i = recv(ev.data.fd, buf, sizeof(buf), 0);
}
if (i < 0)
error(1, errno, "failed to recv");
for (i = 0; i < len; ++i)
if (ev.data.fd == rcv_fd[i])
break;
if (i == len)
error(1, 0, "failed to find socket");
fprintf(stderr, "send node %d, receive socket %d\n", node_id, i);
if (node_id != i)
error(1, 0, "node id/receive socket mismatch");
}
static void test(int *rcv_fd, int len, int family, int proto)
{
struct epoll_event ev;
int epfd, node;
build_rcv_group(rcv_fd, len, family, proto);
attach_bpf(rcv_fd[0]);
epfd = epoll_create(1);
if (epfd < 0)
error(1, errno, "failed to create epoll");
for (node = 0; node < len; ++node) {
ev.events = EPOLLIN;
ev.data.fd = rcv_fd[node];
if (epoll_ctl(epfd, EPOLL_CTL_ADD, rcv_fd[node], &ev))
error(1, errno, "failed to register sock epoll");
}
/* Forward iterate */
for (node = 0; node < len; ++node) {
if (!numa_bitmask_isbitset(numa_nodes_ptr, node))
continue;
send_from_node(node, family, proto);
receive_on_node(rcv_fd, len, epfd, node, proto);
}
/* Reverse iterate */
for (node = len - 1; node >= 0; --node) {
if (!numa_bitmask_isbitset(numa_nodes_ptr, node))
continue;
send_from_node(node, family, proto);
receive_on_node(rcv_fd, len, epfd, node, proto);
}
close(epfd);
for (node = 0; node < len; ++node)
close(rcv_fd[node]);
}
int main(void)
{
int *rcv_fd, nodes;
if (numa_available() < 0)
ksft_exit_skip("no numa api support\n");
nodes = numa_max_node() + 1;
rcv_fd = calloc(nodes, sizeof(int));
if (!rcv_fd)
error(1, 0, "failed to allocate array");
fprintf(stderr, "---- IPv4 UDP ----\n");
test(rcv_fd, nodes, AF_INET, SOCK_DGRAM);
fprintf(stderr, "---- IPv6 UDP ----\n");
test(rcv_fd, nodes, AF_INET6, SOCK_DGRAM);
fprintf(stderr, "---- IPv4 TCP ----\n");
test(rcv_fd, nodes, AF_INET, SOCK_STREAM);
fprintf(stderr, "---- IPv6 TCP ----\n");
test(rcv_fd, nodes, AF_INET6, SOCK_STREAM);
free(rcv_fd);
fprintf(stderr, "SUCCESS\n");
return 0;
}
| linux-master | tools/testing/selftests/net/reuseport_bpf_numa.c |
// SPDX-License-Identifier: GPL-2.0
#define _GNU_SOURCE
#include <stddef.h>
#include <arpa/inet.h>
#include <error.h>
#include <errno.h>
#include <net/if.h>
#include <linux/in.h>
#include <linux/netlink.h>
#include <linux/rtnetlink.h>
#include <netinet/if_ether.h>
#include <netinet/ip.h>
#include <netinet/ip6.h>
#include <netinet/udp.h>
#include <stdbool.h>
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <sys/ioctl.h>
#include <sys/socket.h>
#include <sys/stat.h>
#include <sys/time.h>
#include <sys/types.h>
#include <unistd.h>
#ifndef ETH_MAX_MTU
#define ETH_MAX_MTU 0xFFFFU
#endif
#ifndef UDP_SEGMENT
#define UDP_SEGMENT 103
#endif
#ifndef UDP_MAX_SEGMENTS
#define UDP_MAX_SEGMENTS (1 << 6UL)
#endif
#define CONST_MTU_TEST 1500
#define CONST_HDRLEN_V4 (sizeof(struct iphdr) + sizeof(struct udphdr))
#define CONST_HDRLEN_V6 (sizeof(struct ip6_hdr) + sizeof(struct udphdr))
#define CONST_MSS_V4 (CONST_MTU_TEST - CONST_HDRLEN_V4)
#define CONST_MSS_V6 (CONST_MTU_TEST - CONST_HDRLEN_V6)
#define CONST_MAX_SEGS_V4 (ETH_MAX_MTU / CONST_MSS_V4)
#define CONST_MAX_SEGS_V6 (ETH_MAX_MTU / CONST_MSS_V6)
static bool cfg_do_ipv4;
static bool cfg_do_ipv6;
static bool cfg_do_connected;
static bool cfg_do_connectionless;
static bool cfg_do_msgmore;
static bool cfg_do_setsockopt;
static int cfg_specific_test_id = -1;
static const char cfg_ifname[] = "lo";
static unsigned short cfg_port = 9000;
static char buf[ETH_MAX_MTU];
struct testcase {
int tlen; /* send() buffer size, may exceed mss */
bool tfail; /* send() call is expected to fail */
int gso_len; /* mss after applying gso */
int r_num_mss; /* recv(): number of calls of full mss */
int r_len_last; /* recv(): size of last non-mss dgram, if any */
};
const struct in6_addr addr6 = IN6ADDR_LOOPBACK_INIT;
const struct in_addr addr4 = { .s_addr = __constant_htonl(INADDR_LOOPBACK + 2) };
struct testcase testcases_v4[] = {
{
/* no GSO: send a single byte */
.tlen = 1,
.r_len_last = 1,
},
{
/* no GSO: send a single MSS */
.tlen = CONST_MSS_V4,
.r_num_mss = 1,
},
{
/* no GSO: send a single MSS + 1B: fail */
.tlen = CONST_MSS_V4 + 1,
.tfail = true,
},
{
/* send a single MSS: will fall back to no GSO */
.tlen = CONST_MSS_V4,
.gso_len = CONST_MSS_V4,
.r_num_mss = 1,
},
{
/* send a single MSS + 1B */
.tlen = CONST_MSS_V4 + 1,
.gso_len = CONST_MSS_V4,
.r_num_mss = 1,
.r_len_last = 1,
},
{
/* send exactly 2 MSS */
.tlen = CONST_MSS_V4 * 2,
.gso_len = CONST_MSS_V4,
.r_num_mss = 2,
},
{
/* send 2 MSS + 1B */
.tlen = (CONST_MSS_V4 * 2) + 1,
.gso_len = CONST_MSS_V4,
.r_num_mss = 2,
.r_len_last = 1,
},
{
/* send MAX segs */
.tlen = (ETH_MAX_MTU / CONST_MSS_V4) * CONST_MSS_V4,
.gso_len = CONST_MSS_V4,
.r_num_mss = (ETH_MAX_MTU / CONST_MSS_V4),
},
{
/* send MAX bytes */
.tlen = ETH_MAX_MTU - CONST_HDRLEN_V4,
.gso_len = CONST_MSS_V4,
.r_num_mss = CONST_MAX_SEGS_V4,
.r_len_last = ETH_MAX_MTU - CONST_HDRLEN_V4 -
(CONST_MAX_SEGS_V4 * CONST_MSS_V4),
},
{
/* send MAX + 1: fail */
.tlen = ETH_MAX_MTU - CONST_HDRLEN_V4 + 1,
.gso_len = CONST_MSS_V4,
.tfail = true,
},
{
/* send a single 1B MSS: will fall back to no GSO */
.tlen = 1,
.gso_len = 1,
.r_num_mss = 1,
},
{
/* send 2 1B segments */
.tlen = 2,
.gso_len = 1,
.r_num_mss = 2,
},
{
/* send 2B + 2B + 1B segments */
.tlen = 5,
.gso_len = 2,
.r_num_mss = 2,
.r_len_last = 1,
},
{
/* send max number of min sized segments */
.tlen = UDP_MAX_SEGMENTS,
.gso_len = 1,
.r_num_mss = UDP_MAX_SEGMENTS,
},
{
/* send max number + 1 of min sized segments: fail */
.tlen = UDP_MAX_SEGMENTS + 1,
.gso_len = 1,
.tfail = true,
},
{
/* EOL */
}
};
#ifndef IP6_MAX_MTU
#define IP6_MAX_MTU (ETH_MAX_MTU + sizeof(struct ip6_hdr))
#endif
struct testcase testcases_v6[] = {
{
/* no GSO: send a single byte */
.tlen = 1,
.r_len_last = 1,
},
{
/* no GSO: send a single MSS */
.tlen = CONST_MSS_V6,
.r_num_mss = 1,
},
{
/* no GSO: send a single MSS + 1B: fail */
.tlen = CONST_MSS_V6 + 1,
.tfail = true,
},
{
/* send a single MSS: will fall back to no GSO */
.tlen = CONST_MSS_V6,
.gso_len = CONST_MSS_V6,
.r_num_mss = 1,
},
{
/* send a single MSS + 1B */
.tlen = CONST_MSS_V6 + 1,
.gso_len = CONST_MSS_V6,
.r_num_mss = 1,
.r_len_last = 1,
},
{
/* send exactly 2 MSS */
.tlen = CONST_MSS_V6 * 2,
.gso_len = CONST_MSS_V6,
.r_num_mss = 2,
},
{
/* send 2 MSS + 1B */
.tlen = (CONST_MSS_V6 * 2) + 1,
.gso_len = CONST_MSS_V6,
.r_num_mss = 2,
.r_len_last = 1,
},
{
/* send MAX segs */
.tlen = (IP6_MAX_MTU / CONST_MSS_V6) * CONST_MSS_V6,
.gso_len = CONST_MSS_V6,
.r_num_mss = (IP6_MAX_MTU / CONST_MSS_V6),
},
{
/* send MAX bytes */
.tlen = IP6_MAX_MTU - CONST_HDRLEN_V6,
.gso_len = CONST_MSS_V6,
.r_num_mss = CONST_MAX_SEGS_V6,
.r_len_last = IP6_MAX_MTU - CONST_HDRLEN_V6 -
(CONST_MAX_SEGS_V6 * CONST_MSS_V6),
},
{
/* send MAX + 1: fail */
.tlen = IP6_MAX_MTU - CONST_HDRLEN_V6 + 1,
.gso_len = CONST_MSS_V6,
.tfail = true,
},
{
/* send a single 1B MSS: will fall back to no GSO */
.tlen = 1,
.gso_len = 1,
.r_num_mss = 1,
},
{
/* send 2 1B segments */
.tlen = 2,
.gso_len = 1,
.r_num_mss = 2,
},
{
/* send 2B + 2B + 1B segments */
.tlen = 5,
.gso_len = 2,
.r_num_mss = 2,
.r_len_last = 1,
},
{
/* send max number of min sized segments */
.tlen = UDP_MAX_SEGMENTS,
.gso_len = 1,
.r_num_mss = UDP_MAX_SEGMENTS,
},
{
/* send max number + 1 of min sized segments: fail */
.tlen = UDP_MAX_SEGMENTS + 1,
.gso_len = 1,
.tfail = true,
},
{
/* EOL */
}
};
static unsigned int get_device_mtu(int fd, const char *ifname)
{
struct ifreq ifr;
memset(&ifr, 0, sizeof(ifr));
strcpy(ifr.ifr_name, ifname);
if (ioctl(fd, SIOCGIFMTU, &ifr))
error(1, errno, "ioctl get mtu");
return ifr.ifr_mtu;
}
static void __set_device_mtu(int fd, const char *ifname, unsigned int mtu)
{
struct ifreq ifr;
memset(&ifr, 0, sizeof(ifr));
ifr.ifr_mtu = mtu;
strcpy(ifr.ifr_name, ifname);
if (ioctl(fd, SIOCSIFMTU, &ifr))
error(1, errno, "ioctl set mtu");
}
static void set_device_mtu(int fd, int mtu)
{
int val;
val = get_device_mtu(fd, cfg_ifname);
fprintf(stderr, "device mtu (orig): %u\n", val);
__set_device_mtu(fd, cfg_ifname, mtu);
val = get_device_mtu(fd, cfg_ifname);
if (val != mtu)
error(1, 0, "unable to set device mtu to %u\n", val);
fprintf(stderr, "device mtu (test): %u\n", val);
}
static void set_pmtu_discover(int fd, bool is_ipv4)
{
int level, name, val;
if (is_ipv4) {
level = SOL_IP;
name = IP_MTU_DISCOVER;
val = IP_PMTUDISC_DO;
} else {
level = SOL_IPV6;
name = IPV6_MTU_DISCOVER;
val = IPV6_PMTUDISC_DO;
}
if (setsockopt(fd, level, name, &val, sizeof(val)))
error(1, errno, "setsockopt path mtu");
}
static unsigned int get_path_mtu(int fd, bool is_ipv4)
{
socklen_t vallen;
unsigned int mtu;
int ret;
vallen = sizeof(mtu);
if (is_ipv4)
ret = getsockopt(fd, SOL_IP, IP_MTU, &mtu, &vallen);
else
ret = getsockopt(fd, SOL_IPV6, IPV6_MTU, &mtu, &vallen);
if (ret)
error(1, errno, "getsockopt mtu");
fprintf(stderr, "path mtu (read): %u\n", mtu);
return mtu;
}
/* very wordy version of system("ip route add dev lo mtu 1500 127.0.0.3/32") */
static void set_route_mtu(int mtu, bool is_ipv4)
{
struct sockaddr_nl nladdr = { .nl_family = AF_NETLINK };
struct nlmsghdr *nh;
struct rtattr *rta;
struct rtmsg *rt;
char data[NLMSG_ALIGN(sizeof(*nh)) +
NLMSG_ALIGN(sizeof(*rt)) +
NLMSG_ALIGN(RTA_LENGTH(sizeof(addr6))) +
NLMSG_ALIGN(RTA_LENGTH(sizeof(int))) +
NLMSG_ALIGN(RTA_LENGTH(0) + RTA_LENGTH(sizeof(int)))];
int fd, ret, alen, off = 0;
alen = is_ipv4 ? sizeof(addr4) : sizeof(addr6);
fd = socket(AF_NETLINK, SOCK_RAW, NETLINK_ROUTE);
if (fd == -1)
error(1, errno, "socket netlink");
memset(data, 0, sizeof(data));
nh = (void *)data;
nh->nlmsg_type = RTM_NEWROUTE;
nh->nlmsg_flags = NLM_F_REQUEST | NLM_F_CREATE;
off += NLMSG_ALIGN(sizeof(*nh));
rt = (void *)(data + off);
rt->rtm_family = is_ipv4 ? AF_INET : AF_INET6;
rt->rtm_table = RT_TABLE_MAIN;
rt->rtm_dst_len = alen << 3;
rt->rtm_protocol = RTPROT_BOOT;
rt->rtm_scope = RT_SCOPE_UNIVERSE;
rt->rtm_type = RTN_UNICAST;
off += NLMSG_ALIGN(sizeof(*rt));
rta = (void *)(data + off);
rta->rta_type = RTA_DST;
rta->rta_len = RTA_LENGTH(alen);
if (is_ipv4)
memcpy(RTA_DATA(rta), &addr4, alen);
else
memcpy(RTA_DATA(rta), &addr6, alen);
off += NLMSG_ALIGN(rta->rta_len);
rta = (void *)(data + off);
rta->rta_type = RTA_OIF;
rta->rta_len = RTA_LENGTH(sizeof(int));
*((int *)(RTA_DATA(rta))) = 1; //if_nametoindex("lo");
off += NLMSG_ALIGN(rta->rta_len);
/* MTU is a subtype in a metrics type */
rta = (void *)(data + off);
rta->rta_type = RTA_METRICS;
rta->rta_len = RTA_LENGTH(0) + RTA_LENGTH(sizeof(int));
off += NLMSG_ALIGN(rta->rta_len);
/* now fill MTU subtype. Note that it fits within above rta_len */
rta = (void *)(((char *) rta) + RTA_LENGTH(0));
rta->rta_type = RTAX_MTU;
rta->rta_len = RTA_LENGTH(sizeof(int));
*((int *)(RTA_DATA(rta))) = mtu;
nh->nlmsg_len = off;
ret = sendto(fd, data, off, 0, (void *)&nladdr, sizeof(nladdr));
if (ret != off)
error(1, errno, "send netlink: %uB != %uB\n", ret, off);
if (close(fd))
error(1, errno, "close netlink");
fprintf(stderr, "route mtu (test): %u\n", mtu);
}
static bool __send_one(int fd, struct msghdr *msg, int flags)
{
int ret;
ret = sendmsg(fd, msg, flags);
if (ret == -1 &&
(errno == EMSGSIZE || errno == ENOMEM || errno == EINVAL))
return false;
if (ret == -1)
error(1, errno, "sendmsg");
if (ret != msg->msg_iov->iov_len)
error(1, 0, "sendto: %d != %llu", ret,
(unsigned long long)msg->msg_iov->iov_len);
if (msg->msg_flags)
error(1, 0, "sendmsg: return flags 0x%x\n", msg->msg_flags);
return true;
}
static bool send_one(int fd, int len, int gso_len,
struct sockaddr *addr, socklen_t alen)
{
char control[CMSG_SPACE(sizeof(uint16_t))] = {0};
struct msghdr msg = {0};
struct iovec iov = {0};
struct cmsghdr *cm;
iov.iov_base = buf;
iov.iov_len = len;
msg.msg_iov = &iov;
msg.msg_iovlen = 1;
msg.msg_name = addr;
msg.msg_namelen = alen;
if (gso_len && !cfg_do_setsockopt) {
msg.msg_control = control;
msg.msg_controllen = sizeof(control);
cm = CMSG_FIRSTHDR(&msg);
cm->cmsg_level = SOL_UDP;
cm->cmsg_type = UDP_SEGMENT;
cm->cmsg_len = CMSG_LEN(sizeof(uint16_t));
*((uint16_t *) CMSG_DATA(cm)) = gso_len;
}
/* If MSG_MORE, send 1 byte followed by remainder */
if (cfg_do_msgmore && len > 1) {
iov.iov_len = 1;
if (!__send_one(fd, &msg, MSG_MORE))
error(1, 0, "send 1B failed");
iov.iov_base++;
iov.iov_len = len - 1;
}
return __send_one(fd, &msg, 0);
}
static int recv_one(int fd, int flags)
{
int ret;
ret = recv(fd, buf, sizeof(buf), flags);
if (ret == -1 && errno == EAGAIN && (flags & MSG_DONTWAIT))
return 0;
if (ret == -1)
error(1, errno, "recv");
return ret;
}
static void run_one(struct testcase *test, int fdt, int fdr,
struct sockaddr *addr, socklen_t alen)
{
int i, ret, val, mss;
bool sent;
fprintf(stderr, "ipv%d tx:%d gso:%d %s\n",
addr->sa_family == AF_INET ? 4 : 6,
test->tlen, test->gso_len,
test->tfail ? "(fail)" : "");
val = test->gso_len;
if (cfg_do_setsockopt) {
if (setsockopt(fdt, SOL_UDP, UDP_SEGMENT, &val, sizeof(val)))
error(1, errno, "setsockopt udp segment");
}
sent = send_one(fdt, test->tlen, test->gso_len, addr, alen);
if (sent && test->tfail)
error(1, 0, "send succeeded while expecting failure");
if (!sent && !test->tfail)
error(1, 0, "send failed while expecting success");
if (!sent)
return;
if (test->gso_len)
mss = test->gso_len;
else
mss = addr->sa_family == AF_INET ? CONST_MSS_V4 : CONST_MSS_V6;
/* Recv all full MSS datagrams */
for (i = 0; i < test->r_num_mss; i++) {
ret = recv_one(fdr, 0);
if (ret != mss)
error(1, 0, "recv.%d: %d != %d", i, ret, mss);
}
/* Recv the non-full last datagram, if tlen was not a multiple of mss */
if (test->r_len_last) {
ret = recv_one(fdr, 0);
if (ret != test->r_len_last)
error(1, 0, "recv.%d: %d != %d (last)",
i, ret, test->r_len_last);
}
/* Verify received all data */
ret = recv_one(fdr, MSG_DONTWAIT);
if (ret)
error(1, 0, "recv: unexpected datagram");
}
static void run_all(int fdt, int fdr, struct sockaddr *addr, socklen_t alen)
{
struct testcase *tests, *test;
tests = addr->sa_family == AF_INET ? testcases_v4 : testcases_v6;
for (test = tests; test->tlen; test++) {
/* if a specific test is given, then skip all others */
if (cfg_specific_test_id == -1 ||
cfg_specific_test_id == test - tests)
run_one(test, fdt, fdr, addr, alen);
}
}
static void run_test(struct sockaddr *addr, socklen_t alen)
{
struct timeval tv = { .tv_usec = 100 * 1000 };
int fdr, fdt, val;
fdr = socket(addr->sa_family, SOCK_DGRAM, 0);
if (fdr == -1)
error(1, errno, "socket r");
if (bind(fdr, addr, alen))
error(1, errno, "bind");
/* Have tests fail quickly instead of hang */
if (setsockopt(fdr, SOL_SOCKET, SO_RCVTIMEO, &tv, sizeof(tv)))
error(1, errno, "setsockopt rcv timeout");
fdt = socket(addr->sa_family, SOCK_DGRAM, 0);
if (fdt == -1)
error(1, errno, "socket t");
/* Do not fragment these datagrams: only succeed if GSO works */
set_pmtu_discover(fdt, addr->sa_family == AF_INET);
if (cfg_do_connectionless) {
set_device_mtu(fdt, CONST_MTU_TEST);
run_all(fdt, fdr, addr, alen);
}
if (cfg_do_connected) {
set_device_mtu(fdt, CONST_MTU_TEST + 100);
set_route_mtu(CONST_MTU_TEST, addr->sa_family == AF_INET);
if (connect(fdt, addr, alen))
error(1, errno, "connect");
val = get_path_mtu(fdt, addr->sa_family == AF_INET);
if (val != CONST_MTU_TEST)
error(1, 0, "bad path mtu %u\n", val);
run_all(fdt, fdr, addr, 0 /* use connected addr */);
}
if (close(fdt))
error(1, errno, "close t");
if (close(fdr))
error(1, errno, "close r");
}
static void run_test_v4(void)
{
struct sockaddr_in addr = {0};
addr.sin_family = AF_INET;
addr.sin_port = htons(cfg_port);
addr.sin_addr = addr4;
run_test((void *)&addr, sizeof(addr));
}
static void run_test_v6(void)
{
struct sockaddr_in6 addr = {0};
addr.sin6_family = AF_INET6;
addr.sin6_port = htons(cfg_port);
addr.sin6_addr = addr6;
run_test((void *)&addr, sizeof(addr));
}
static void parse_opts(int argc, char **argv)
{
int c;
while ((c = getopt(argc, argv, "46cCmst:")) != -1) {
switch (c) {
case '4':
cfg_do_ipv4 = true;
break;
case '6':
cfg_do_ipv6 = true;
break;
case 'c':
cfg_do_connected = true;
break;
case 'C':
cfg_do_connectionless = true;
break;
case 'm':
cfg_do_msgmore = true;
break;
case 's':
cfg_do_setsockopt = true;
break;
case 't':
cfg_specific_test_id = strtoul(optarg, NULL, 0);
break;
default:
error(1, 0, "%s: parse error", argv[0]);
}
}
}
int main(int argc, char **argv)
{
parse_opts(argc, argv);
if (cfg_do_ipv4)
run_test_v4();
if (cfg_do_ipv6)
run_test_v6();
fprintf(stderr, "OK\n");
return 0;
}
| linux-master | tools/testing/selftests/net/udpgso.c |
// SPDX-License-Identifier: GPL-2.0-only
/*
* This program demonstrates how the various time stamping features in
* the Linux kernel work. It emulates the behavior of a PTP
* implementation in stand-alone master mode by sending PTPv1 Sync
* multicasts once every second. It looks for similar packets, but
* beyond that doesn't actually implement PTP.
*
* Outgoing packets are time stamped with SO_TIMESTAMPING with or
* without hardware support.
*
* Incoming packets are time stamped with SO_TIMESTAMPING with or
* without hardware support, SIOCGSTAMP[NS] (per-socket time stamp) and
* SO_TIMESTAMP[NS].
*
* Copyright (C) 2009 Intel Corporation.
* Author: Patrick Ohly <[email protected]>
*/
#include <stdio.h>
#include <stdlib.h>
#include <errno.h>
#include <string.h>
#include <sys/time.h>
#include <sys/socket.h>
#include <sys/select.h>
#include <sys/ioctl.h>
#include <arpa/inet.h>
#include <net/if.h>
#include <asm/types.h>
#include <linux/net_tstamp.h>
#include <linux/errqueue.h>
#include <linux/sockios.h>
#ifndef SO_TIMESTAMPING
# define SO_TIMESTAMPING 37
# define SCM_TIMESTAMPING SO_TIMESTAMPING
#endif
#ifndef SO_TIMESTAMPNS
# define SO_TIMESTAMPNS 35
#endif
static void usage(const char *error)
{
if (error)
printf("invalid option: %s\n", error);
printf("timestamping <interface> [bind_phc_index] [option]*\n\n"
"Options:\n"
" IP_MULTICAST_LOOP - looping outgoing multicasts\n"
" SO_TIMESTAMP - normal software time stamping, ms resolution\n"
" SO_TIMESTAMPNS - more accurate software time stamping\n"
" SOF_TIMESTAMPING_TX_HARDWARE - hardware time stamping of outgoing packets\n"
" SOF_TIMESTAMPING_TX_SOFTWARE - software fallback for outgoing packets\n"
" SOF_TIMESTAMPING_RX_HARDWARE - hardware time stamping of incoming packets\n"
" SOF_TIMESTAMPING_RX_SOFTWARE - software fallback for incoming packets\n"
" SOF_TIMESTAMPING_SOFTWARE - request reporting of software time stamps\n"
" SOF_TIMESTAMPING_RAW_HARDWARE - request reporting of raw HW time stamps\n"
" SOF_TIMESTAMPING_BIND_PHC - request to bind a PHC of PTP vclock\n"
" SIOCGSTAMP - check last socket time stamp\n"
" SIOCGSTAMPNS - more accurate socket time stamp\n"
" PTPV2 - use PTPv2 messages\n");
exit(1);
}
static void bail(const char *error)
{
printf("%s: %s\n", error, strerror(errno));
exit(1);
}
static const unsigned char sync[] = {
0x00, 0x01, 0x00, 0x01,
0x5f, 0x44, 0x46, 0x4c,
0x54, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00,
0x01, 0x01,
/* fake uuid */
0x00, 0x01,
0x02, 0x03, 0x04, 0x05,
0x00, 0x01, 0x00, 0x37,
0x00, 0x00, 0x00, 0x08,
0x00, 0x00, 0x00, 0x00,
0x49, 0x05, 0xcd, 0x01,
0x29, 0xb1, 0x8d, 0xb0,
0x00, 0x00, 0x00, 0x00,
0x00, 0x01,
/* fake uuid */
0x00, 0x01,
0x02, 0x03, 0x04, 0x05,
0x00, 0x00, 0x00, 0x37,
0x00, 0x00, 0x00, 0x04,
0x44, 0x46, 0x4c, 0x54,
0x00, 0x00, 0xf0, 0x60,
0x00, 0x01, 0x00, 0x00,
0x00, 0x00, 0x00, 0x01,
0x00, 0x00, 0xf0, 0x60,
0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x04,
0x44, 0x46, 0x4c, 0x54,
0x00, 0x01,
/* fake uuid */
0x00, 0x01,
0x02, 0x03, 0x04, 0x05,
0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00
};
static const unsigned char sync_v2[] = {
0x00, 0x02, 0x00, 0x2C,
0x00, 0x00, 0x02, 0x00,
0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0xFF,
0xFE, 0x00, 0x00, 0x00,
0x00, 0x01, 0x00, 0x01,
0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00,
};
static void sendpacket(int sock, struct sockaddr *addr, socklen_t addr_len, int ptpv2)
{
size_t sync_len = ptpv2 ? sizeof(sync_v2) : sizeof(sync);
const void *sync_p = ptpv2 ? sync_v2 : sync;
struct timeval now;
int res;
res = sendto(sock, sync_p, sync_len, 0, addr, addr_len);
gettimeofday(&now, 0);
if (res < 0)
printf("%s: %s\n", "send", strerror(errno));
else
printf("%ld.%06ld: sent %d bytes\n",
(long)now.tv_sec, (long)now.tv_usec,
res);
}
static void printpacket(struct msghdr *msg, int res,
char *data,
int sock, int recvmsg_flags,
int siocgstamp, int siocgstampns, int ptpv2)
{
struct sockaddr_in *from_addr = (struct sockaddr_in *)msg->msg_name;
size_t sync_len = ptpv2 ? sizeof(sync_v2) : sizeof(sync);
const void *sync_p = ptpv2 ? sync_v2 : sync;
struct cmsghdr *cmsg;
struct timeval tv;
struct timespec ts;
struct timeval now;
gettimeofday(&now, 0);
printf("%ld.%06ld: received %s data, %d bytes from %s, %zu bytes control messages\n",
(long)now.tv_sec, (long)now.tv_usec,
(recvmsg_flags & MSG_ERRQUEUE) ? "error" : "regular",
res,
inet_ntoa(from_addr->sin_addr),
msg->msg_controllen);
for (cmsg = CMSG_FIRSTHDR(msg);
cmsg;
cmsg = CMSG_NXTHDR(msg, cmsg)) {
printf(" cmsg len %zu: ", cmsg->cmsg_len);
switch (cmsg->cmsg_level) {
case SOL_SOCKET:
printf("SOL_SOCKET ");
switch (cmsg->cmsg_type) {
case SO_TIMESTAMP: {
struct timeval *stamp =
(struct timeval *)CMSG_DATA(cmsg);
printf("SO_TIMESTAMP %ld.%06ld",
(long)stamp->tv_sec,
(long)stamp->tv_usec);
break;
}
case SO_TIMESTAMPNS: {
struct timespec *stamp =
(struct timespec *)CMSG_DATA(cmsg);
printf("SO_TIMESTAMPNS %ld.%09ld",
(long)stamp->tv_sec,
(long)stamp->tv_nsec);
break;
}
case SO_TIMESTAMPING: {
struct timespec *stamp =
(struct timespec *)CMSG_DATA(cmsg);
printf("SO_TIMESTAMPING ");
printf("SW %ld.%09ld ",
(long)stamp->tv_sec,
(long)stamp->tv_nsec);
stamp++;
/* skip deprecated HW transformed */
stamp++;
printf("HW raw %ld.%09ld",
(long)stamp->tv_sec,
(long)stamp->tv_nsec);
break;
}
default:
printf("type %d", cmsg->cmsg_type);
break;
}
break;
case IPPROTO_IP:
printf("IPPROTO_IP ");
switch (cmsg->cmsg_type) {
case IP_RECVERR: {
struct sock_extended_err *err =
(struct sock_extended_err *)CMSG_DATA(cmsg);
printf("IP_RECVERR ee_errno '%s' ee_origin %d => %s",
strerror(err->ee_errno),
err->ee_origin,
#ifdef SO_EE_ORIGIN_TIMESTAMPING
err->ee_origin == SO_EE_ORIGIN_TIMESTAMPING ?
"bounced packet" : "unexpected origin"
#else
"probably SO_EE_ORIGIN_TIMESTAMPING"
#endif
);
if (res < sync_len)
printf(" => truncated data?!");
else if (!memcmp(sync_p, data + res - sync_len, sync_len))
printf(" => GOT OUR DATA BACK (HURRAY!)");
break;
}
case IP_PKTINFO: {
struct in_pktinfo *pktinfo =
(struct in_pktinfo *)CMSG_DATA(cmsg);
printf("IP_PKTINFO interface index %u",
pktinfo->ipi_ifindex);
break;
}
default:
printf("type %d", cmsg->cmsg_type);
break;
}
break;
default:
printf("level %d type %d",
cmsg->cmsg_level,
cmsg->cmsg_type);
break;
}
printf("\n");
}
if (siocgstamp) {
if (ioctl(sock, SIOCGSTAMP, &tv))
printf(" %s: %s\n", "SIOCGSTAMP", strerror(errno));
else
printf("SIOCGSTAMP %ld.%06ld\n",
(long)tv.tv_sec,
(long)tv.tv_usec);
}
if (siocgstampns) {
if (ioctl(sock, SIOCGSTAMPNS, &ts))
printf(" %s: %s\n", "SIOCGSTAMPNS", strerror(errno));
else
printf("SIOCGSTAMPNS %ld.%09ld\n",
(long)ts.tv_sec,
(long)ts.tv_nsec);
}
}
static void recvpacket(int sock, int recvmsg_flags,
int siocgstamp, int siocgstampns, int ptpv2)
{
char data[256];
struct msghdr msg;
struct iovec entry;
struct sockaddr_in from_addr;
struct {
struct cmsghdr cm;
char control[512];
} control;
int res;
memset(&msg, 0, sizeof(msg));
msg.msg_iov = &entry;
msg.msg_iovlen = 1;
entry.iov_base = data;
entry.iov_len = sizeof(data);
msg.msg_name = (caddr_t)&from_addr;
msg.msg_namelen = sizeof(from_addr);
msg.msg_control = &control;
msg.msg_controllen = sizeof(control);
res = recvmsg(sock, &msg, recvmsg_flags|MSG_DONTWAIT);
if (res < 0) {
printf("%s %s: %s\n",
"recvmsg",
(recvmsg_flags & MSG_ERRQUEUE) ? "error" : "regular",
strerror(errno));
} else {
printpacket(&msg, res, data,
sock, recvmsg_flags,
siocgstamp, siocgstampns, ptpv2);
}
}
int main(int argc, char **argv)
{
int so_timestamp = 0;
int so_timestampns = 0;
int siocgstamp = 0;
int siocgstampns = 0;
int ip_multicast_loop = 0;
int ptpv2 = 0;
char *interface;
int i;
int enabled = 1;
int sock;
struct ifreq device;
struct ifreq hwtstamp;
struct hwtstamp_config hwconfig, hwconfig_requested;
struct so_timestamping so_timestamping_get = { 0, 0 };
struct so_timestamping so_timestamping = { 0, 0 };
struct sockaddr_in addr;
struct ip_mreq imr;
struct in_addr iaddr;
int val;
socklen_t len;
struct timeval next;
size_t if_len;
if (argc < 2)
usage(0);
interface = argv[1];
if_len = strlen(interface);
if (if_len >= IFNAMSIZ) {
printf("interface name exceeds IFNAMSIZ\n");
exit(1);
}
if (argc >= 3 && sscanf(argv[2], "%d", &so_timestamping.bind_phc) == 1)
val = 3;
else
val = 2;
for (i = val; i < argc; i++) {
if (!strcasecmp(argv[i], "SO_TIMESTAMP"))
so_timestamp = 1;
else if (!strcasecmp(argv[i], "SO_TIMESTAMPNS"))
so_timestampns = 1;
else if (!strcasecmp(argv[i], "SIOCGSTAMP"))
siocgstamp = 1;
else if (!strcasecmp(argv[i], "SIOCGSTAMPNS"))
siocgstampns = 1;
else if (!strcasecmp(argv[i], "IP_MULTICAST_LOOP"))
ip_multicast_loop = 1;
else if (!strcasecmp(argv[i], "PTPV2"))
ptpv2 = 1;
else if (!strcasecmp(argv[i], "SOF_TIMESTAMPING_TX_HARDWARE"))
so_timestamping.flags |= SOF_TIMESTAMPING_TX_HARDWARE;
else if (!strcasecmp(argv[i], "SOF_TIMESTAMPING_TX_SOFTWARE"))
so_timestamping.flags |= SOF_TIMESTAMPING_TX_SOFTWARE;
else if (!strcasecmp(argv[i], "SOF_TIMESTAMPING_RX_HARDWARE"))
so_timestamping.flags |= SOF_TIMESTAMPING_RX_HARDWARE;
else if (!strcasecmp(argv[i], "SOF_TIMESTAMPING_RX_SOFTWARE"))
so_timestamping.flags |= SOF_TIMESTAMPING_RX_SOFTWARE;
else if (!strcasecmp(argv[i], "SOF_TIMESTAMPING_SOFTWARE"))
so_timestamping.flags |= SOF_TIMESTAMPING_SOFTWARE;
else if (!strcasecmp(argv[i], "SOF_TIMESTAMPING_RAW_HARDWARE"))
so_timestamping.flags |= SOF_TIMESTAMPING_RAW_HARDWARE;
else if (!strcasecmp(argv[i], "SOF_TIMESTAMPING_BIND_PHC"))
so_timestamping.flags |= SOF_TIMESTAMPING_BIND_PHC;
else
usage(argv[i]);
}
sock = socket(PF_INET, SOCK_DGRAM, IPPROTO_UDP);
if (sock < 0)
bail("socket");
memset(&device, 0, sizeof(device));
memcpy(device.ifr_name, interface, if_len + 1);
if (ioctl(sock, SIOCGIFADDR, &device) < 0)
bail("getting interface IP address");
memset(&hwtstamp, 0, sizeof(hwtstamp));
memcpy(hwtstamp.ifr_name, interface, if_len + 1);
hwtstamp.ifr_data = (void *)&hwconfig;
memset(&hwconfig, 0, sizeof(hwconfig));
hwconfig.tx_type =
(so_timestamping.flags & SOF_TIMESTAMPING_TX_HARDWARE) ?
HWTSTAMP_TX_ON : HWTSTAMP_TX_OFF;
hwconfig.rx_filter =
(so_timestamping.flags & SOF_TIMESTAMPING_RX_HARDWARE) ?
ptpv2 ? HWTSTAMP_FILTER_PTP_V2_L4_SYNC :
HWTSTAMP_FILTER_PTP_V1_L4_SYNC : HWTSTAMP_FILTER_NONE;
hwconfig_requested = hwconfig;
if (ioctl(sock, SIOCSHWTSTAMP, &hwtstamp) < 0) {
if ((errno == EINVAL || errno == ENOTSUP) &&
hwconfig_requested.tx_type == HWTSTAMP_TX_OFF &&
hwconfig_requested.rx_filter == HWTSTAMP_FILTER_NONE)
printf("SIOCSHWTSTAMP: disabling hardware time stamping not possible\n");
else
bail("SIOCSHWTSTAMP");
}
printf("SIOCSHWTSTAMP: tx_type %d requested, got %d; rx_filter %d requested, got %d\n",
hwconfig_requested.tx_type, hwconfig.tx_type,
hwconfig_requested.rx_filter, hwconfig.rx_filter);
/* bind to PTP port */
addr.sin_family = AF_INET;
addr.sin_addr.s_addr = htonl(INADDR_ANY);
addr.sin_port = htons(319 /* PTP event port */);
if (bind(sock,
(struct sockaddr *)&addr,
sizeof(struct sockaddr_in)) < 0)
bail("bind");
if (setsockopt(sock, SOL_SOCKET, SO_BINDTODEVICE, interface, if_len))
bail("bind device");
/* set multicast group for outgoing packets */
inet_aton("224.0.1.130", &iaddr); /* alternate PTP domain 1 */
addr.sin_addr = iaddr;
imr.imr_multiaddr.s_addr = iaddr.s_addr;
imr.imr_interface.s_addr =
((struct sockaddr_in *)&device.ifr_addr)->sin_addr.s_addr;
if (setsockopt(sock, IPPROTO_IP, IP_MULTICAST_IF,
&imr.imr_interface.s_addr, sizeof(struct in_addr)) < 0)
bail("set multicast");
/* join multicast group, loop our own packet */
if (setsockopt(sock, IPPROTO_IP, IP_ADD_MEMBERSHIP,
&imr, sizeof(struct ip_mreq)) < 0)
bail("join multicast group");
if (setsockopt(sock, IPPROTO_IP, IP_MULTICAST_LOOP,
&ip_multicast_loop, sizeof(enabled)) < 0) {
bail("loop multicast");
}
/* set socket options for time stamping */
if (so_timestamp &&
setsockopt(sock, SOL_SOCKET, SO_TIMESTAMP,
&enabled, sizeof(enabled)) < 0)
bail("setsockopt SO_TIMESTAMP");
if (so_timestampns &&
setsockopt(sock, SOL_SOCKET, SO_TIMESTAMPNS,
&enabled, sizeof(enabled)) < 0)
bail("setsockopt SO_TIMESTAMPNS");
if (so_timestamping.flags &&
setsockopt(sock, SOL_SOCKET, SO_TIMESTAMPING, &so_timestamping,
sizeof(so_timestamping)) < 0)
bail("setsockopt SO_TIMESTAMPING");
/* request IP_PKTINFO for debugging purposes */
if (setsockopt(sock, SOL_IP, IP_PKTINFO,
&enabled, sizeof(enabled)) < 0)
printf("%s: %s\n", "setsockopt IP_PKTINFO", strerror(errno));
/* verify socket options */
len = sizeof(val);
if (getsockopt(sock, SOL_SOCKET, SO_TIMESTAMP, &val, &len) < 0)
printf("%s: %s\n", "getsockopt SO_TIMESTAMP", strerror(errno));
else
printf("SO_TIMESTAMP %d\n", val);
if (getsockopt(sock, SOL_SOCKET, SO_TIMESTAMPNS, &val, &len) < 0)
printf("%s: %s\n", "getsockopt SO_TIMESTAMPNS",
strerror(errno));
else
printf("SO_TIMESTAMPNS %d\n", val);
len = sizeof(so_timestamping_get);
if (getsockopt(sock, SOL_SOCKET, SO_TIMESTAMPING, &so_timestamping_get,
&len) < 0) {
printf("%s: %s\n", "getsockopt SO_TIMESTAMPING",
strerror(errno));
} else {
printf("SO_TIMESTAMPING flags %d, bind phc %d\n",
so_timestamping_get.flags, so_timestamping_get.bind_phc);
if (so_timestamping_get.flags != so_timestamping.flags ||
so_timestamping_get.bind_phc != so_timestamping.bind_phc)
printf(" not expected, flags %d, bind phc %d\n",
so_timestamping.flags, so_timestamping.bind_phc);
}
/* send packets forever every five seconds */
gettimeofday(&next, 0);
next.tv_sec = (next.tv_sec + 1) / 5 * 5;
next.tv_usec = 0;
while (1) {
struct timeval now;
struct timeval delta;
long delta_us;
int res;
fd_set readfs, errorfs;
gettimeofday(&now, 0);
delta_us = (long)(next.tv_sec - now.tv_sec) * 1000000 +
(long)(next.tv_usec - now.tv_usec);
if (delta_us > 0) {
/* continue waiting for timeout or data */
delta.tv_sec = delta_us / 1000000;
delta.tv_usec = delta_us % 1000000;
FD_ZERO(&readfs);
FD_ZERO(&errorfs);
FD_SET(sock, &readfs);
FD_SET(sock, &errorfs);
printf("%ld.%06ld: select %ldus\n",
(long)now.tv_sec, (long)now.tv_usec,
delta_us);
res = select(sock + 1, &readfs, 0, &errorfs, &delta);
gettimeofday(&now, 0);
printf("%ld.%06ld: select returned: %d, %s\n",
(long)now.tv_sec, (long)now.tv_usec,
res,
res < 0 ? strerror(errno) : "success");
if (res > 0) {
if (FD_ISSET(sock, &readfs))
printf("ready for reading\n");
if (FD_ISSET(sock, &errorfs))
printf("has error\n");
recvpacket(sock, 0,
siocgstamp,
siocgstampns, ptpv2);
recvpacket(sock, MSG_ERRQUEUE,
siocgstamp,
siocgstampns, ptpv2);
}
} else {
/* write one packet */
sendpacket(sock,
(struct sockaddr *)&addr,
sizeof(addr), ptpv2);
next.tv_sec += 5;
continue;
}
}
return 0;
}
| linux-master | tools/testing/selftests/net/timestamping.c |
// SPDX-License-Identifier: GPL-2.0
#define _GNU_SOURCE
#include <errno.h>
#include <fcntl.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <net/if.h>
#include <linux/if_tun.h>
#include <linux/netlink.h>
#include <linux/rtnetlink.h>
#include <sys/ioctl.h>
#include <sys/socket.h>
#include <linux/virtio_net.h>
#include <netinet/ip.h>
#include <netinet/udp.h>
#include "../kselftest_harness.h"
static const char param_dev_tap_name[] = "xmacvtap0";
static const char param_dev_dummy_name[] = "xdummy0";
static unsigned char param_hwaddr_src[] = { 0x00, 0xfe, 0x98, 0x14, 0x22, 0x42 };
static unsigned char param_hwaddr_dest[] = {
0x00, 0xfe, 0x98, 0x94, 0xd2, 0x43
};
#define MAX_RTNL_PAYLOAD (2048)
#define PKT_DATA 0xCB
#define TEST_PACKET_SZ (sizeof(struct virtio_net_hdr) + ETH_HLEN + ETH_MAX_MTU)
static struct rtattr *rtattr_add(struct nlmsghdr *nh, unsigned short type,
unsigned short len)
{
struct rtattr *rta =
(struct rtattr *)((uint8_t *)nh + RTA_ALIGN(nh->nlmsg_len));
rta->rta_type = type;
rta->rta_len = RTA_LENGTH(len);
nh->nlmsg_len = RTA_ALIGN(nh->nlmsg_len) + RTA_ALIGN(rta->rta_len);
return rta;
}
static struct rtattr *rtattr_begin(struct nlmsghdr *nh, unsigned short type)
{
return rtattr_add(nh, type, 0);
}
static void rtattr_end(struct nlmsghdr *nh, struct rtattr *attr)
{
uint8_t *end = (uint8_t *)nh + nh->nlmsg_len;
attr->rta_len = end - (uint8_t *)attr;
}
static struct rtattr *rtattr_add_str(struct nlmsghdr *nh, unsigned short type,
const char *s)
{
struct rtattr *rta = rtattr_add(nh, type, strlen(s));
memcpy(RTA_DATA(rta), s, strlen(s));
return rta;
}
static struct rtattr *rtattr_add_strsz(struct nlmsghdr *nh, unsigned short type,
const char *s)
{
struct rtattr *rta = rtattr_add(nh, type, strlen(s) + 1);
strcpy(RTA_DATA(rta), s);
return rta;
}
static struct rtattr *rtattr_add_any(struct nlmsghdr *nh, unsigned short type,
const void *arr, size_t len)
{
struct rtattr *rta = rtattr_add(nh, type, len);
memcpy(RTA_DATA(rta), arr, len);
return rta;
}
static int dev_create(const char *dev, const char *link_type,
int (*fill_rtattr)(struct nlmsghdr *nh),
int (*fill_info_data)(struct nlmsghdr *nh))
{
struct {
struct nlmsghdr nh;
struct ifinfomsg info;
unsigned char data[MAX_RTNL_PAYLOAD];
} req;
struct rtattr *link_info, *info_data;
int ret, rtnl;
rtnl = socket(AF_NETLINK, SOCK_DGRAM, NETLINK_ROUTE);
if (rtnl < 0) {
fprintf(stderr, "%s: socket %s\n", __func__, strerror(errno));
return 1;
}
memset(&req, 0, sizeof(req));
req.nh.nlmsg_len = NLMSG_LENGTH(sizeof(req.info));
req.nh.nlmsg_flags = NLM_F_REQUEST | NLM_F_CREATE;
req.nh.nlmsg_type = RTM_NEWLINK;
req.info.ifi_family = AF_UNSPEC;
req.info.ifi_type = 1;
req.info.ifi_index = 0;
req.info.ifi_flags = IFF_BROADCAST | IFF_UP;
req.info.ifi_change = 0xffffffff;
rtattr_add_str(&req.nh, IFLA_IFNAME, dev);
if (fill_rtattr) {
ret = fill_rtattr(&req.nh);
if (ret)
return ret;
}
link_info = rtattr_begin(&req.nh, IFLA_LINKINFO);
rtattr_add_strsz(&req.nh, IFLA_INFO_KIND, link_type);
if (fill_info_data) {
info_data = rtattr_begin(&req.nh, IFLA_INFO_DATA);
ret = fill_info_data(&req.nh);
if (ret)
return ret;
rtattr_end(&req.nh, info_data);
}
rtattr_end(&req.nh, link_info);
ret = send(rtnl, &req, req.nh.nlmsg_len, 0);
if (ret < 0)
fprintf(stderr, "%s: send %s\n", __func__, strerror(errno));
ret = (unsigned int)ret != req.nh.nlmsg_len;
close(rtnl);
return ret;
}
static int dev_delete(const char *dev)
{
struct {
struct nlmsghdr nh;
struct ifinfomsg info;
unsigned char data[MAX_RTNL_PAYLOAD];
} req;
int ret, rtnl;
rtnl = socket(AF_NETLINK, SOCK_DGRAM, NETLINK_ROUTE);
if (rtnl < 0) {
fprintf(stderr, "%s: socket %s\n", __func__, strerror(errno));
return 1;
}
memset(&req, 0, sizeof(req));
req.nh.nlmsg_len = NLMSG_LENGTH(sizeof(req.info));
req.nh.nlmsg_flags = NLM_F_REQUEST;
req.nh.nlmsg_type = RTM_DELLINK;
req.info.ifi_family = AF_UNSPEC;
rtattr_add_str(&req.nh, IFLA_IFNAME, dev);
ret = send(rtnl, &req, req.nh.nlmsg_len, 0);
if (ret < 0)
fprintf(stderr, "%s: send %s\n", __func__, strerror(errno));
ret = (unsigned int)ret != req.nh.nlmsg_len;
close(rtnl);
return ret;
}
static int macvtap_fill_rtattr(struct nlmsghdr *nh)
{
int ifindex;
ifindex = if_nametoindex(param_dev_dummy_name);
if (ifindex == 0) {
fprintf(stderr, "%s: ifindex %s\n", __func__, strerror(errno));
return -errno;
}
rtattr_add_any(nh, IFLA_LINK, &ifindex, sizeof(ifindex));
rtattr_add_any(nh, IFLA_ADDRESS, param_hwaddr_src, ETH_ALEN);
return 0;
}
static int opentap(const char *devname)
{
int ifindex;
char buf[256];
int fd;
struct ifreq ifr;
ifindex = if_nametoindex(devname);
if (ifindex == 0) {
fprintf(stderr, "%s: ifindex %s\n", __func__, strerror(errno));
return -errno;
}
sprintf(buf, "/dev/tap%d", ifindex);
fd = open(buf, O_RDWR | O_NONBLOCK);
if (fd < 0) {
fprintf(stderr, "%s: open %s\n", __func__, strerror(errno));
return -errno;
}
memset(&ifr, 0, sizeof(ifr));
strcpy(ifr.ifr_name, devname);
ifr.ifr_flags = IFF_TAP | IFF_NO_PI | IFF_VNET_HDR | IFF_MULTI_QUEUE;
if (ioctl(fd, TUNSETIFF, &ifr, sizeof(ifr)) < 0)
return -errno;
return fd;
}
size_t build_eth(uint8_t *buf, uint16_t proto)
{
struct ethhdr *eth = (struct ethhdr *)buf;
eth->h_proto = htons(proto);
memcpy(eth->h_source, param_hwaddr_src, ETH_ALEN);
memcpy(eth->h_dest, param_hwaddr_dest, ETH_ALEN);
return ETH_HLEN;
}
static uint32_t add_csum(const uint8_t *buf, int len)
{
uint32_t sum = 0;
uint16_t *sbuf = (uint16_t *)buf;
while (len > 1) {
sum += *sbuf++;
len -= 2;
}
if (len)
sum += *(uint8_t *)sbuf;
return sum;
}
static uint16_t finish_ip_csum(uint32_t sum)
{
uint16_t lo = sum & 0xffff;
uint16_t hi = sum >> 16;
return ~(lo + hi);
}
static uint16_t build_ip_csum(const uint8_t *buf, int len,
uint32_t sum)
{
sum += add_csum(buf, len);
return finish_ip_csum(sum);
}
static int build_ipv4_header(uint8_t *buf, int payload_len)
{
struct iphdr *iph = (struct iphdr *)buf;
iph->ihl = 5;
iph->version = 4;
iph->ttl = 8;
iph->tot_len =
htons(sizeof(*iph) + sizeof(struct udphdr) + payload_len);
iph->id = htons(1337);
iph->protocol = IPPROTO_UDP;
iph->saddr = htonl((172 << 24) | (17 << 16) | 2);
iph->daddr = htonl((172 << 24) | (17 << 16) | 1);
iph->check = build_ip_csum(buf, iph->ihl << 2, 0);
return iph->ihl << 2;
}
static int build_udp_packet(uint8_t *buf, int payload_len, bool csum_off)
{
const int ip4alen = sizeof(uint32_t);
struct udphdr *udph = (struct udphdr *)buf;
int len = sizeof(*udph) + payload_len;
uint32_t sum = 0;
udph->source = htons(22);
udph->dest = htons(58822);
udph->len = htons(len);
memset(buf + sizeof(struct udphdr), PKT_DATA, payload_len);
sum = add_csum(buf - 2 * ip4alen, 2 * ip4alen);
sum += htons(IPPROTO_UDP) + udph->len;
if (!csum_off)
sum += add_csum(buf, len);
udph->check = finish_ip_csum(sum);
return sizeof(*udph) + payload_len;
}
size_t build_test_packet_valid_udp_gso(uint8_t *buf, size_t payload_len)
{
uint8_t *cur = buf;
struct virtio_net_hdr *vh = (struct virtio_net_hdr *)buf;
vh->hdr_len = ETH_HLEN + sizeof(struct iphdr) + sizeof(struct udphdr);
vh->flags = VIRTIO_NET_HDR_F_NEEDS_CSUM;
vh->csum_start = ETH_HLEN + sizeof(struct iphdr);
vh->csum_offset = __builtin_offsetof(struct udphdr, check);
vh->gso_type = VIRTIO_NET_HDR_GSO_UDP;
vh->gso_size = ETH_DATA_LEN - sizeof(struct iphdr);
cur += sizeof(*vh);
cur += build_eth(cur, ETH_P_IP);
cur += build_ipv4_header(cur, payload_len);
cur += build_udp_packet(cur, payload_len, true);
return cur - buf;
}
size_t build_test_packet_valid_udp_csum(uint8_t *buf, size_t payload_len)
{
uint8_t *cur = buf;
struct virtio_net_hdr *vh = (struct virtio_net_hdr *)buf;
vh->flags = VIRTIO_NET_HDR_F_DATA_VALID;
vh->gso_type = VIRTIO_NET_HDR_GSO_NONE;
cur += sizeof(*vh);
cur += build_eth(cur, ETH_P_IP);
cur += build_ipv4_header(cur, payload_len);
cur += build_udp_packet(cur, payload_len, false);
return cur - buf;
}
size_t build_test_packet_crash_tap_invalid_eth_proto(uint8_t *buf,
size_t payload_len)
{
uint8_t *cur = buf;
struct virtio_net_hdr *vh = (struct virtio_net_hdr *)buf;
vh->hdr_len = ETH_HLEN + sizeof(struct iphdr) + sizeof(struct udphdr);
vh->flags = 0;
vh->gso_type = VIRTIO_NET_HDR_GSO_UDP;
vh->gso_size = ETH_DATA_LEN - sizeof(struct iphdr);
cur += sizeof(*vh);
cur += build_eth(cur, 0);
cur += sizeof(struct iphdr) + sizeof(struct udphdr);
cur += build_ipv4_header(cur, payload_len);
cur += build_udp_packet(cur, payload_len, true);
cur += payload_len;
return cur - buf;
}
FIXTURE(tap)
{
int fd;
};
FIXTURE_SETUP(tap)
{
int ret;
ret = dev_create(param_dev_dummy_name, "dummy", NULL, NULL);
EXPECT_EQ(ret, 0);
ret = dev_create(param_dev_tap_name, "macvtap", macvtap_fill_rtattr,
NULL);
EXPECT_EQ(ret, 0);
self->fd = opentap(param_dev_tap_name);
ASSERT_GE(self->fd, 0);
}
FIXTURE_TEARDOWN(tap)
{
int ret;
if (self->fd != -1)
close(self->fd);
ret = dev_delete(param_dev_tap_name);
EXPECT_EQ(ret, 0);
ret = dev_delete(param_dev_dummy_name);
EXPECT_EQ(ret, 0);
}
TEST_F(tap, test_packet_valid_udp_gso)
{
uint8_t pkt[TEST_PACKET_SZ];
size_t off;
int ret;
memset(pkt, 0, sizeof(pkt));
off = build_test_packet_valid_udp_gso(pkt, 1021);
ret = write(self->fd, pkt, off);
ASSERT_EQ(ret, off);
}
TEST_F(tap, test_packet_valid_udp_csum)
{
uint8_t pkt[TEST_PACKET_SZ];
size_t off;
int ret;
memset(pkt, 0, sizeof(pkt));
off = build_test_packet_valid_udp_csum(pkt, 1024);
ret = write(self->fd, pkt, off);
ASSERT_EQ(ret, off);
}
TEST_F(tap, test_packet_crash_tap_invalid_eth_proto)
{
uint8_t pkt[TEST_PACKET_SZ];
size_t off;
int ret;
memset(pkt, 0, sizeof(pkt));
off = build_test_packet_crash_tap_invalid_eth_proto(pkt, 1024);
ret = write(self->fd, pkt, off);
ASSERT_EQ(ret, -1);
ASSERT_EQ(errno, EINVAL);
}
TEST_HARNESS_MAIN
| linux-master | tools/testing/selftests/net/tap.c |
// SPDX-License-Identifier: GPL-2.0-only
/*
* Copyright 2014 Google Inc.
* Author: [email protected] (Willem de Bruijn)
*
* Test software tx timestamping, including
*
* - SCHED, SND and ACK timestamps
* - RAW, UDP and TCP
* - IPv4 and IPv6
* - various packet sizes (to test GSO and TSO)
*
* Consult the command line arguments for help on running
* the various testcases.
*
* This test requires a dummy TCP server.
* A simple `nc6 [-u] -l -p $DESTPORT` will do
*/
#define _GNU_SOURCE
#include <arpa/inet.h>
#include <asm/types.h>
#include <error.h>
#include <errno.h>
#include <inttypes.h>
#include <linux/errqueue.h>
#include <linux/if_ether.h>
#include <linux/if_packet.h>
#include <linux/ipv6.h>
#include <linux/net_tstamp.h>
#include <netdb.h>
#include <net/if.h>
#include <netinet/in.h>
#include <netinet/ip.h>
#include <netinet/udp.h>
#include <netinet/tcp.h>
#include <poll.h>
#include <stdarg.h>
#include <stdbool.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/epoll.h>
#include <sys/ioctl.h>
#include <sys/select.h>
#include <sys/socket.h>
#include <sys/time.h>
#include <sys/types.h>
#include <time.h>
#include <unistd.h>
#define NSEC_PER_USEC 1000L
#define USEC_PER_SEC 1000000L
#define NSEC_PER_SEC 1000000000LL
/* command line parameters */
static int cfg_proto = SOCK_STREAM;
static int cfg_ipproto = IPPROTO_TCP;
static int cfg_num_pkts = 4;
static int do_ipv4 = 1;
static int do_ipv6 = 1;
static int cfg_payload_len = 10;
static int cfg_poll_timeout = 100;
static int cfg_delay_snd;
static int cfg_delay_ack;
static int cfg_delay_tolerance_usec = 500;
static bool cfg_show_payload;
static bool cfg_do_pktinfo;
static bool cfg_busy_poll;
static int cfg_sleep_usec = 50 * 1000;
static bool cfg_loop_nodata;
static bool cfg_use_cmsg;
static bool cfg_use_pf_packet;
static bool cfg_use_epoll;
static bool cfg_epollet;
static bool cfg_do_listen;
static uint16_t dest_port = 9000;
static bool cfg_print_nsec;
static struct sockaddr_in daddr;
static struct sockaddr_in6 daddr6;
static struct timespec ts_usr;
static int saved_tskey = -1;
static int saved_tskey_type = -1;
struct timing_event {
int64_t min;
int64_t max;
int64_t total;
int count;
};
static struct timing_event usr_enq;
static struct timing_event usr_snd;
static struct timing_event usr_ack;
static bool test_failed;
static int64_t timespec_to_ns64(struct timespec *ts)
{
return ts->tv_sec * NSEC_PER_SEC + ts->tv_nsec;
}
static int64_t timespec_to_us64(struct timespec *ts)
{
return ts->tv_sec * USEC_PER_SEC + ts->tv_nsec / NSEC_PER_USEC;
}
static void init_timing_event(struct timing_event *te)
{
te->min = INT64_MAX;
te->max = 0;
te->total = 0;
te->count = 0;
}
static void add_timing_event(struct timing_event *te,
struct timespec *t_start, struct timespec *t_end)
{
int64_t ts_delta = timespec_to_ns64(t_end) - timespec_to_ns64(t_start);
te->count++;
if (ts_delta < te->min)
te->min = ts_delta;
if (ts_delta > te->max)
te->max = ts_delta;
te->total += ts_delta;
}
static void validate_key(int tskey, int tstype)
{
int stepsize;
/* compare key for each subsequent request
* must only test for one type, the first one requested
*/
if (saved_tskey == -1)
saved_tskey_type = tstype;
else if (saved_tskey_type != tstype)
return;
stepsize = cfg_proto == SOCK_STREAM ? cfg_payload_len : 1;
if (tskey != saved_tskey + stepsize) {
fprintf(stderr, "ERROR: key %d, expected %d\n",
tskey, saved_tskey + stepsize);
test_failed = true;
}
saved_tskey = tskey;
}
static void validate_timestamp(struct timespec *cur, int min_delay)
{
int64_t cur64, start64;
int max_delay;
cur64 = timespec_to_us64(cur);
start64 = timespec_to_us64(&ts_usr);
max_delay = min_delay + cfg_delay_tolerance_usec;
if (cur64 < start64 + min_delay || cur64 > start64 + max_delay) {
fprintf(stderr, "ERROR: %" PRId64 " us expected between %d and %d\n",
cur64 - start64, min_delay, max_delay);
test_failed = true;
}
}
static void __print_ts_delta_formatted(int64_t ts_delta)
{
if (cfg_print_nsec)
fprintf(stderr, "%" PRId64 " ns", ts_delta);
else
fprintf(stderr, "%" PRId64 " us", ts_delta / NSEC_PER_USEC);
}
static void __print_timestamp(const char *name, struct timespec *cur,
uint32_t key, int payload_len)
{
int64_t ts_delta;
if (!(cur->tv_sec | cur->tv_nsec))
return;
if (cfg_print_nsec)
fprintf(stderr, " %s: %lu s %lu ns (seq=%u, len=%u)",
name, cur->tv_sec, cur->tv_nsec,
key, payload_len);
else
fprintf(stderr, " %s: %lu s %lu us (seq=%u, len=%u)",
name, cur->tv_sec, cur->tv_nsec / NSEC_PER_USEC,
key, payload_len);
if (cur != &ts_usr) {
ts_delta = timespec_to_ns64(cur) - timespec_to_ns64(&ts_usr);
fprintf(stderr, " (USR +");
__print_ts_delta_formatted(ts_delta);
fprintf(stderr, ")");
}
fprintf(stderr, "\n");
}
static void print_timestamp_usr(void)
{
if (clock_gettime(CLOCK_REALTIME, &ts_usr))
error(1, errno, "clock_gettime");
__print_timestamp(" USR", &ts_usr, 0, 0);
}
static void print_timestamp(struct scm_timestamping *tss, int tstype,
int tskey, int payload_len)
{
const char *tsname;
validate_key(tskey, tstype);
switch (tstype) {
case SCM_TSTAMP_SCHED:
tsname = " ENQ";
validate_timestamp(&tss->ts[0], 0);
add_timing_event(&usr_enq, &ts_usr, &tss->ts[0]);
break;
case SCM_TSTAMP_SND:
tsname = " SND";
validate_timestamp(&tss->ts[0], cfg_delay_snd);
add_timing_event(&usr_snd, &ts_usr, &tss->ts[0]);
break;
case SCM_TSTAMP_ACK:
tsname = " ACK";
validate_timestamp(&tss->ts[0], cfg_delay_ack);
add_timing_event(&usr_ack, &ts_usr, &tss->ts[0]);
break;
default:
error(1, 0, "unknown timestamp type: %u",
tstype);
}
__print_timestamp(tsname, &tss->ts[0], tskey, payload_len);
}
static void print_timing_event(char *name, struct timing_event *te)
{
if (!te->count)
return;
fprintf(stderr, " %s: count=%d", name, te->count);
fprintf(stderr, ", avg=");
__print_ts_delta_formatted((int64_t)(te->total / te->count));
fprintf(stderr, ", min=");
__print_ts_delta_formatted(te->min);
fprintf(stderr, ", max=");
__print_ts_delta_formatted(te->max);
fprintf(stderr, "\n");
}
/* TODO: convert to check_and_print payload once API is stable */
static void print_payload(char *data, int len)
{
int i;
if (!len)
return;
if (len > 70)
len = 70;
fprintf(stderr, "payload: ");
for (i = 0; i < len; i++)
fprintf(stderr, "%02hhx ", data[i]);
fprintf(stderr, "\n");
}
static void print_pktinfo(int family, int ifindex, void *saddr, void *daddr)
{
char sa[INET6_ADDRSTRLEN], da[INET6_ADDRSTRLEN];
fprintf(stderr, " pktinfo: ifindex=%u src=%s dst=%s\n",
ifindex,
saddr ? inet_ntop(family, saddr, sa, sizeof(sa)) : "unknown",
daddr ? inet_ntop(family, daddr, da, sizeof(da)) : "unknown");
}
static void __epoll(int epfd)
{
struct epoll_event events;
int ret;
memset(&events, 0, sizeof(events));
ret = epoll_wait(epfd, &events, 1, cfg_poll_timeout);
if (ret != 1)
error(1, errno, "epoll_wait");
}
static void __poll(int fd)
{
struct pollfd pollfd;
int ret;
memset(&pollfd, 0, sizeof(pollfd));
pollfd.fd = fd;
ret = poll(&pollfd, 1, cfg_poll_timeout);
if (ret != 1)
error(1, errno, "poll");
}
static void __recv_errmsg_cmsg(struct msghdr *msg, int payload_len)
{
struct sock_extended_err *serr = NULL;
struct scm_timestamping *tss = NULL;
struct cmsghdr *cm;
int batch = 0;
for (cm = CMSG_FIRSTHDR(msg);
cm && cm->cmsg_len;
cm = CMSG_NXTHDR(msg, cm)) {
if (cm->cmsg_level == SOL_SOCKET &&
cm->cmsg_type == SCM_TIMESTAMPING) {
tss = (void *) CMSG_DATA(cm);
} else if ((cm->cmsg_level == SOL_IP &&
cm->cmsg_type == IP_RECVERR) ||
(cm->cmsg_level == SOL_IPV6 &&
cm->cmsg_type == IPV6_RECVERR) ||
(cm->cmsg_level == SOL_PACKET &&
cm->cmsg_type == PACKET_TX_TIMESTAMP)) {
serr = (void *) CMSG_DATA(cm);
if (serr->ee_errno != ENOMSG ||
serr->ee_origin != SO_EE_ORIGIN_TIMESTAMPING) {
fprintf(stderr, "unknown ip error %d %d\n",
serr->ee_errno,
serr->ee_origin);
serr = NULL;
}
} else if (cm->cmsg_level == SOL_IP &&
cm->cmsg_type == IP_PKTINFO) {
struct in_pktinfo *info = (void *) CMSG_DATA(cm);
print_pktinfo(AF_INET, info->ipi_ifindex,
&info->ipi_spec_dst, &info->ipi_addr);
} else if (cm->cmsg_level == SOL_IPV6 &&
cm->cmsg_type == IPV6_PKTINFO) {
struct in6_pktinfo *info6 = (void *) CMSG_DATA(cm);
print_pktinfo(AF_INET6, info6->ipi6_ifindex,
NULL, &info6->ipi6_addr);
} else
fprintf(stderr, "unknown cmsg %d,%d\n",
cm->cmsg_level, cm->cmsg_type);
if (serr && tss) {
print_timestamp(tss, serr->ee_info, serr->ee_data,
payload_len);
serr = NULL;
tss = NULL;
batch++;
}
}
if (batch > 1)
fprintf(stderr, "batched %d timestamps\n", batch);
}
static int recv_errmsg(int fd)
{
static char ctrl[1024 /* overprovision*/];
static struct msghdr msg;
struct iovec entry;
static char *data;
int ret = 0;
data = malloc(cfg_payload_len);
if (!data)
error(1, 0, "malloc");
memset(&msg, 0, sizeof(msg));
memset(&entry, 0, sizeof(entry));
memset(ctrl, 0, sizeof(ctrl));
entry.iov_base = data;
entry.iov_len = cfg_payload_len;
msg.msg_iov = &entry;
msg.msg_iovlen = 1;
msg.msg_name = NULL;
msg.msg_namelen = 0;
msg.msg_control = ctrl;
msg.msg_controllen = sizeof(ctrl);
ret = recvmsg(fd, &msg, MSG_ERRQUEUE);
if (ret == -1 && errno != EAGAIN)
error(1, errno, "recvmsg");
if (ret >= 0) {
__recv_errmsg_cmsg(&msg, ret);
if (cfg_show_payload)
print_payload(data, cfg_payload_len);
}
free(data);
return ret == -1;
}
static uint16_t get_ip_csum(const uint16_t *start, int num_words,
unsigned long sum)
{
int i;
for (i = 0; i < num_words; i++)
sum += start[i];
while (sum >> 16)
sum = (sum & 0xFFFF) + (sum >> 16);
return ~sum;
}
static uint16_t get_udp_csum(const struct udphdr *udph, int alen)
{
unsigned long pseudo_sum, csum_len;
const void *csum_start = udph;
pseudo_sum = htons(IPPROTO_UDP);
pseudo_sum += udph->len;
/* checksum ip(v6) addresses + udp header + payload */
csum_start -= alen * 2;
csum_len = ntohs(udph->len) + alen * 2;
return get_ip_csum(csum_start, csum_len >> 1, pseudo_sum);
}
static int fill_header_ipv4(void *p)
{
struct iphdr *iph = p;
memset(iph, 0, sizeof(*iph));
iph->ihl = 5;
iph->version = 4;
iph->ttl = 2;
iph->saddr = daddr.sin_addr.s_addr; /* set for udp csum calc */
iph->daddr = daddr.sin_addr.s_addr;
iph->protocol = IPPROTO_UDP;
/* kernel writes saddr, csum, len */
return sizeof(*iph);
}
static int fill_header_ipv6(void *p)
{
struct ipv6hdr *ip6h = p;
memset(ip6h, 0, sizeof(*ip6h));
ip6h->version = 6;
ip6h->payload_len = htons(sizeof(struct udphdr) + cfg_payload_len);
ip6h->nexthdr = IPPROTO_UDP;
ip6h->hop_limit = 64;
ip6h->saddr = daddr6.sin6_addr;
ip6h->daddr = daddr6.sin6_addr;
/* kernel does not write saddr in case of ipv6 */
return sizeof(*ip6h);
}
static void fill_header_udp(void *p, bool is_ipv4)
{
struct udphdr *udph = p;
udph->source = ntohs(dest_port + 1); /* spoof */
udph->dest = ntohs(dest_port);
udph->len = ntohs(sizeof(*udph) + cfg_payload_len);
udph->check = 0;
udph->check = get_udp_csum(udph, is_ipv4 ? sizeof(struct in_addr) :
sizeof(struct in6_addr));
}
static void do_test(int family, unsigned int report_opt)
{
char control[CMSG_SPACE(sizeof(uint32_t))];
struct sockaddr_ll laddr;
unsigned int sock_opt;
struct cmsghdr *cmsg;
struct msghdr msg;
struct iovec iov;
char *buf;
int fd, i, val = 1, total_len, epfd = 0;
init_timing_event(&usr_enq);
init_timing_event(&usr_snd);
init_timing_event(&usr_ack);
total_len = cfg_payload_len;
if (cfg_use_pf_packet || cfg_proto == SOCK_RAW) {
total_len += sizeof(struct udphdr);
if (cfg_use_pf_packet || cfg_ipproto == IPPROTO_RAW) {
if (family == PF_INET)
total_len += sizeof(struct iphdr);
else
total_len += sizeof(struct ipv6hdr);
}
/* special case, only rawv6_sendmsg:
* pass proto in sin6_port if not connected
* also see ANK comment in net/ipv4/raw.c
*/
daddr6.sin6_port = htons(cfg_ipproto);
}
buf = malloc(total_len);
if (!buf)
error(1, 0, "malloc");
fd = socket(cfg_use_pf_packet ? PF_PACKET : family,
cfg_proto, cfg_ipproto);
if (fd < 0)
error(1, errno, "socket");
if (cfg_use_epoll) {
struct epoll_event ev;
memset(&ev, 0, sizeof(ev));
ev.data.fd = fd;
if (cfg_epollet)
ev.events |= EPOLLET;
epfd = epoll_create(1);
if (epfd <= 0)
error(1, errno, "epoll_create");
if (epoll_ctl(epfd, EPOLL_CTL_ADD, fd, &ev))
error(1, errno, "epoll_ctl");
}
/* reset expected key on each new socket */
saved_tskey = -1;
if (cfg_proto == SOCK_STREAM) {
if (setsockopt(fd, IPPROTO_TCP, TCP_NODELAY,
(char*) &val, sizeof(val)))
error(1, 0, "setsockopt no nagle");
if (family == PF_INET) {
if (connect(fd, (void *) &daddr, sizeof(daddr)))
error(1, errno, "connect ipv4");
} else {
if (connect(fd, (void *) &daddr6, sizeof(daddr6)))
error(1, errno, "connect ipv6");
}
}
if (cfg_do_pktinfo) {
if (family == AF_INET6) {
if (setsockopt(fd, SOL_IPV6, IPV6_RECVPKTINFO,
&val, sizeof(val)))
error(1, errno, "setsockopt pktinfo ipv6");
} else {
if (setsockopt(fd, SOL_IP, IP_PKTINFO,
&val, sizeof(val)))
error(1, errno, "setsockopt pktinfo ipv4");
}
}
sock_opt = SOF_TIMESTAMPING_SOFTWARE |
SOF_TIMESTAMPING_OPT_CMSG |
SOF_TIMESTAMPING_OPT_ID;
if (!cfg_use_cmsg)
sock_opt |= report_opt;
if (cfg_loop_nodata)
sock_opt |= SOF_TIMESTAMPING_OPT_TSONLY;
if (setsockopt(fd, SOL_SOCKET, SO_TIMESTAMPING,
(char *) &sock_opt, sizeof(sock_opt)))
error(1, 0, "setsockopt timestamping");
for (i = 0; i < cfg_num_pkts; i++) {
memset(&msg, 0, sizeof(msg));
memset(buf, 'a' + i, total_len);
if (cfg_use_pf_packet || cfg_proto == SOCK_RAW) {
int off = 0;
if (cfg_use_pf_packet || cfg_ipproto == IPPROTO_RAW) {
if (family == PF_INET)
off = fill_header_ipv4(buf);
else
off = fill_header_ipv6(buf);
}
fill_header_udp(buf + off, family == PF_INET);
}
print_timestamp_usr();
iov.iov_base = buf;
iov.iov_len = total_len;
if (cfg_proto != SOCK_STREAM) {
if (cfg_use_pf_packet) {
memset(&laddr, 0, sizeof(laddr));
laddr.sll_family = AF_PACKET;
laddr.sll_ifindex = 1;
laddr.sll_protocol = htons(family == AF_INET ? ETH_P_IP : ETH_P_IPV6);
laddr.sll_halen = ETH_ALEN;
msg.msg_name = (void *)&laddr;
msg.msg_namelen = sizeof(laddr);
} else if (family == PF_INET) {
msg.msg_name = (void *)&daddr;
msg.msg_namelen = sizeof(daddr);
} else {
msg.msg_name = (void *)&daddr6;
msg.msg_namelen = sizeof(daddr6);
}
}
msg.msg_iov = &iov;
msg.msg_iovlen = 1;
if (cfg_use_cmsg) {
memset(control, 0, sizeof(control));
msg.msg_control = control;
msg.msg_controllen = sizeof(control);
cmsg = CMSG_FIRSTHDR(&msg);
cmsg->cmsg_level = SOL_SOCKET;
cmsg->cmsg_type = SO_TIMESTAMPING;
cmsg->cmsg_len = CMSG_LEN(sizeof(uint32_t));
*((uint32_t *) CMSG_DATA(cmsg)) = report_opt;
}
val = sendmsg(fd, &msg, 0);
if (val != total_len)
error(1, errno, "send");
/* wait for all errors to be queued, else ACKs arrive OOO */
if (cfg_sleep_usec)
usleep(cfg_sleep_usec);
if (!cfg_busy_poll) {
if (cfg_use_epoll)
__epoll(epfd);
else
__poll(fd);
}
while (!recv_errmsg(fd)) {}
}
print_timing_event("USR-ENQ", &usr_enq);
print_timing_event("USR-SND", &usr_snd);
print_timing_event("USR-ACK", &usr_ack);
if (close(fd))
error(1, errno, "close");
free(buf);
usleep(100 * NSEC_PER_USEC);
}
static void __attribute__((noreturn)) usage(const char *filepath)
{
fprintf(stderr, "\nUsage: %s [options] hostname\n"
"\nwhere options are:\n"
" -4: only IPv4\n"
" -6: only IPv6\n"
" -h: show this message\n"
" -b: busy poll to read from error queue\n"
" -c N: number of packets for each test\n"
" -C: use cmsg to set tstamp recording options\n"
" -e: use level-triggered epoll() instead of poll()\n"
" -E: use event-triggered epoll() instead of poll()\n"
" -F: poll()/epoll() waits forever for an event\n"
" -I: request PKTINFO\n"
" -l N: send N bytes at a time\n"
" -L listen on hostname and port\n"
" -n: set no-payload option\n"
" -N: print timestamps and durations in nsec (instead of usec)\n"
" -p N: connect to port N\n"
" -P: use PF_PACKET\n"
" -r: use raw\n"
" -R: use raw (IP_HDRINCL)\n"
" -S N: usec to sleep before reading error queue\n"
" -t N: tolerance (usec) for timestamp validation\n"
" -u: use udp\n"
" -v: validate SND delay (usec)\n"
" -V: validate ACK delay (usec)\n"
" -x: show payload (up to 70 bytes)\n",
filepath);
exit(1);
}
static void parse_opt(int argc, char **argv)
{
int proto_count = 0;
int c;
while ((c = getopt(argc, argv,
"46bc:CeEFhIl:LnNp:PrRS:t:uv:V:x")) != -1) {
switch (c) {
case '4':
do_ipv6 = 0;
break;
case '6':
do_ipv4 = 0;
break;
case 'b':
cfg_busy_poll = true;
break;
case 'c':
cfg_num_pkts = strtoul(optarg, NULL, 10);
break;
case 'C':
cfg_use_cmsg = true;
break;
case 'e':
cfg_use_epoll = true;
break;
case 'E':
cfg_use_epoll = true;
cfg_epollet = true;
case 'F':
cfg_poll_timeout = -1;
break;
case 'I':
cfg_do_pktinfo = true;
break;
case 'l':
cfg_payload_len = strtoul(optarg, NULL, 10);
break;
case 'L':
cfg_do_listen = true;
break;
case 'n':
cfg_loop_nodata = true;
break;
case 'N':
cfg_print_nsec = true;
break;
case 'p':
dest_port = strtoul(optarg, NULL, 10);
break;
case 'P':
proto_count++;
cfg_use_pf_packet = true;
cfg_proto = SOCK_DGRAM;
cfg_ipproto = 0;
break;
case 'r':
proto_count++;
cfg_proto = SOCK_RAW;
cfg_ipproto = IPPROTO_UDP;
break;
case 'R':
proto_count++;
cfg_proto = SOCK_RAW;
cfg_ipproto = IPPROTO_RAW;
break;
case 'S':
cfg_sleep_usec = strtoul(optarg, NULL, 10);
break;
case 't':
cfg_delay_tolerance_usec = strtoul(optarg, NULL, 10);
break;
case 'u':
proto_count++;
cfg_proto = SOCK_DGRAM;
cfg_ipproto = IPPROTO_UDP;
break;
case 'v':
cfg_delay_snd = strtoul(optarg, NULL, 10);
break;
case 'V':
cfg_delay_ack = strtoul(optarg, NULL, 10);
break;
case 'x':
cfg_show_payload = true;
break;
case 'h':
default:
usage(argv[0]);
}
}
if (!cfg_payload_len)
error(1, 0, "payload may not be nonzero");
if (cfg_proto != SOCK_STREAM && cfg_payload_len > 1472)
error(1, 0, "udp packet might exceed expected MTU");
if (!do_ipv4 && !do_ipv6)
error(1, 0, "pass -4 or -6, not both");
if (proto_count > 1)
error(1, 0, "pass -P, -r, -R or -u, not multiple");
if (cfg_do_pktinfo && cfg_use_pf_packet)
error(1, 0, "cannot ask for pktinfo over pf_packet");
if (cfg_busy_poll && cfg_use_epoll)
error(1, 0, "pass epoll or busy_poll, not both");
if (optind != argc - 1)
error(1, 0, "missing required hostname argument");
}
static void resolve_hostname(const char *hostname)
{
struct addrinfo hints = { .ai_family = do_ipv4 ? AF_INET : AF_INET6 };
struct addrinfo *addrs, *cur;
int have_ipv4 = 0, have_ipv6 = 0;
retry:
if (getaddrinfo(hostname, NULL, &hints, &addrs))
error(1, errno, "getaddrinfo");
cur = addrs;
while (cur && !have_ipv4 && !have_ipv6) {
if (!have_ipv4 && cur->ai_family == AF_INET) {
memcpy(&daddr, cur->ai_addr, sizeof(daddr));
daddr.sin_port = htons(dest_port);
have_ipv4 = 1;
}
else if (!have_ipv6 && cur->ai_family == AF_INET6) {
memcpy(&daddr6, cur->ai_addr, sizeof(daddr6));
daddr6.sin6_port = htons(dest_port);
have_ipv6 = 1;
}
cur = cur->ai_next;
}
if (addrs)
freeaddrinfo(addrs);
if (do_ipv6 && hints.ai_family != AF_INET6) {
hints.ai_family = AF_INET6;
goto retry;
}
do_ipv4 &= have_ipv4;
do_ipv6 &= have_ipv6;
}
static void do_listen(int family, void *addr, int alen)
{
int fd, type;
type = cfg_proto == SOCK_RAW ? SOCK_DGRAM : cfg_proto;
fd = socket(family, type, 0);
if (fd == -1)
error(1, errno, "socket rx");
if (bind(fd, addr, alen))
error(1, errno, "bind rx");
if (type == SOCK_STREAM && listen(fd, 10))
error(1, errno, "listen rx");
/* leave fd open, will be closed on process exit.
* this enables connect() to succeed and avoids icmp replies
*/
}
static void do_main(int family)
{
fprintf(stderr, "family: %s %s\n",
family == PF_INET ? "INET" : "INET6",
cfg_use_pf_packet ? "(PF_PACKET)" : "");
fprintf(stderr, "test SND\n");
do_test(family, SOF_TIMESTAMPING_TX_SOFTWARE);
fprintf(stderr, "test ENQ\n");
do_test(family, SOF_TIMESTAMPING_TX_SCHED);
fprintf(stderr, "test ENQ + SND\n");
do_test(family, SOF_TIMESTAMPING_TX_SCHED |
SOF_TIMESTAMPING_TX_SOFTWARE);
if (cfg_proto == SOCK_STREAM) {
fprintf(stderr, "\ntest ACK\n");
do_test(family, SOF_TIMESTAMPING_TX_ACK);
fprintf(stderr, "\ntest SND + ACK\n");
do_test(family, SOF_TIMESTAMPING_TX_SOFTWARE |
SOF_TIMESTAMPING_TX_ACK);
fprintf(stderr, "\ntest ENQ + SND + ACK\n");
do_test(family, SOF_TIMESTAMPING_TX_SCHED |
SOF_TIMESTAMPING_TX_SOFTWARE |
SOF_TIMESTAMPING_TX_ACK);
}
}
const char *sock_names[] = { NULL, "TCP", "UDP", "RAW" };
int main(int argc, char **argv)
{
if (argc == 1)
usage(argv[0]);
parse_opt(argc, argv);
resolve_hostname(argv[argc - 1]);
fprintf(stderr, "protocol: %s\n", sock_names[cfg_proto]);
fprintf(stderr, "payload: %u\n", cfg_payload_len);
fprintf(stderr, "server port: %u\n", dest_port);
fprintf(stderr, "\n");
if (do_ipv4) {
if (cfg_do_listen)
do_listen(PF_INET, &daddr, sizeof(daddr));
do_main(PF_INET);
}
if (do_ipv6) {
if (cfg_do_listen)
do_listen(PF_INET6, &daddr6, sizeof(daddr6));
do_main(PF_INET6);
}
return test_failed;
}
| linux-master | tools/testing/selftests/net/txtimestamp.c |
// SPDX-License-Identifier: GPL-2.0
#define _GNU_SOURCE
#include <sched.h>
#include <unistd.h>
#include <stdio.h>
#include <errno.h>
#include <string.h>
#include <stdlib.h>
#include <stdint.h>
#include <sys/types.h>
#include <sys/socket.h>
#ifndef SO_NETNS_COOKIE
#define SO_NETNS_COOKIE 71
#endif
#define pr_err(fmt, ...) \
({ \
fprintf(stderr, "%s:%d:" fmt ": %m\n", \
__func__, __LINE__, ##__VA_ARGS__); \
1; \
})
int main(int argc, char *argvp[])
{
uint64_t cookie1, cookie2;
socklen_t vallen;
int sock1, sock2;
sock1 = socket(AF_INET, SOCK_STREAM, 0);
if (sock1 < 0)
return pr_err("Unable to create TCP socket");
vallen = sizeof(cookie1);
if (getsockopt(sock1, SOL_SOCKET, SO_NETNS_COOKIE, &cookie1, &vallen) != 0)
return pr_err("getsockopt(SOL_SOCKET, SO_NETNS_COOKIE)");
if (!cookie1)
return pr_err("SO_NETNS_COOKIE returned zero cookie");
if (unshare(CLONE_NEWNET))
return pr_err("unshare");
sock2 = socket(AF_INET, SOCK_STREAM, 0);
if (sock2 < 0)
return pr_err("Unable to create TCP socket");
vallen = sizeof(cookie2);
if (getsockopt(sock2, SOL_SOCKET, SO_NETNS_COOKIE, &cookie2, &vallen) != 0)
return pr_err("getsockopt(SOL_SOCKET, SO_NETNS_COOKIE)");
if (!cookie2)
return pr_err("SO_NETNS_COOKIE returned zero cookie");
if (cookie1 == cookie2)
return pr_err("SO_NETNS_COOKIE returned identical cookies for distinct ns");
close(sock1);
close(sock2);
return 0;
}
| linux-master | tools/testing/selftests/net/so_netns_cookie.c |
// SPDX-License-Identifier: GPL-2.0
#include <arpa/inet.h>
#include <error.h>
#include <errno.h>
#include <unistd.h>
int main(void)
{
int fd1, fd2, one = 1;
struct sockaddr_in6 bind_addr = {
.sin6_family = AF_INET6,
.sin6_port = htons(20000),
.sin6_flowinfo = htonl(0),
.sin6_addr = {},
.sin6_scope_id = 0,
};
inet_pton(AF_INET6, "::", &bind_addr.sin6_addr);
fd1 = socket(AF_INET6, SOCK_STREAM, IPPROTO_IP);
if (fd1 < 0) {
error(1, errno, "socket fd1");
return -1;
}
if (setsockopt(fd1, SOL_SOCKET, SO_REUSEADDR, &one, sizeof(one))) {
error(1, errno, "setsockopt(SO_REUSEADDR) fd1");
goto out_err1;
}
if (bind(fd1, (struct sockaddr *)&bind_addr, sizeof(bind_addr))) {
error(1, errno, "bind fd1");
goto out_err1;
}
if (listen(fd1, 0)) {
error(1, errno, "listen");
goto out_err1;
}
fd2 = socket(AF_INET6, SOCK_STREAM, IPPROTO_IP);
if (fd2 < 0) {
error(1, errno, "socket fd2");
goto out_err1;
}
if (connect(fd2, (struct sockaddr *)&bind_addr, sizeof(bind_addr))) {
error(1, errno, "bind fd2");
goto out_err2;
}
close(fd2);
close(fd1);
return 0;
out_err2:
close(fd2);
out_err1:
close(fd1);
return -1;
}
| linux-master | tools/testing/selftests/net/sk_connect_zero_addr.c |
// SPDX-License-Identifier: GPL-2.0
/* nettest - used for functional tests of networking APIs
*
* Copyright (c) 2013-2019 David Ahern <[email protected]>. All rights reserved.
*/
#define _GNU_SOURCE
#include <features.h>
#include <sys/types.h>
#include <sys/ioctl.h>
#include <sys/socket.h>
#include <sys/wait.h>
#include <linux/tcp.h>
#include <linux/udp.h>
#include <arpa/inet.h>
#include <net/if.h>
#include <netinet/in.h>
#include <netinet/ip.h>
#include <netdb.h>
#include <fcntl.h>
#include <libgen.h>
#include <limits.h>
#include <sched.h>
#include <stdarg.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <time.h>
#include <errno.h>
#include <getopt.h>
#include <linux/xfrm.h>
#include <linux/ipsec.h>
#include <linux/pfkeyv2.h>
#ifndef IPV6_UNICAST_IF
#define IPV6_UNICAST_IF 76
#endif
#ifndef IPV6_MULTICAST_IF
#define IPV6_MULTICAST_IF 17
#endif
#define DEFAULT_PORT 12345
#define NS_PREFIX "/run/netns/"
#ifndef MAX
#define MAX(a, b) ((a) > (b) ? (a) : (b))
#endif
#ifndef MIN
#define MIN(a, b) ((a) < (b) ? (a) : (b))
#endif
struct sock_args {
/* local address */
const char *local_addr_str;
const char *client_local_addr_str;
union {
struct in_addr in;
struct in6_addr in6;
} local_addr;
/* remote address */
const char *remote_addr_str;
union {
struct in_addr in;
struct in6_addr in6;
} remote_addr;
int scope_id; /* remote scope; v6 send only */
struct in_addr grp; /* multicast group */
unsigned int has_local_ip:1,
has_remote_ip:1,
has_grp:1,
has_expected_laddr:1,
has_expected_raddr:1,
bind_test_only:1,
client_dontroute:1,
server_dontroute:1;
unsigned short port;
int type; /* DGRAM, STREAM, RAW */
int protocol;
int version; /* AF_INET/AF_INET6 */
int use_setsockopt;
int use_freebind;
int use_cmsg;
uint8_t dsfield;
const char *dev;
const char *server_dev;
int ifindex;
const char *clientns;
const char *serverns;
const char *password;
const char *client_pw;
/* prefix for MD5 password */
const char *md5_prefix_str;
union {
struct sockaddr_in v4;
struct sockaddr_in6 v6;
} md5_prefix;
unsigned int prefix_len;
/* 0: default, -1: force off, +1: force on */
int bind_key_ifindex;
/* expected addresses and device index for connection */
const char *expected_dev;
const char *expected_server_dev;
int expected_ifindex;
/* local address */
const char *expected_laddr_str;
union {
struct in_addr in;
struct in6_addr in6;
} expected_laddr;
/* remote address */
const char *expected_raddr_str;
union {
struct in_addr in;
struct in6_addr in6;
} expected_raddr;
/* ESP in UDP encap test */
int use_xfrm;
/* use send() and connect() instead of sendto */
int datagram_connect;
};
static int server_mode;
static unsigned int prog_timeout = 5;
static unsigned int interactive;
static int iter = 1;
static char *msg = "Hello world!";
static int msglen;
static int quiet;
static int try_broadcast = 1;
static char *timestamp(char *timebuf, int buflen)
{
time_t now;
now = time(NULL);
if (strftime(timebuf, buflen, "%T", localtime(&now)) == 0) {
memset(timebuf, 0, buflen);
strncpy(timebuf, "00:00:00", buflen-1);
}
return timebuf;
}
static void log_msg(const char *format, ...)
{
char timebuf[64];
va_list args;
if (quiet)
return;
fprintf(stdout, "%s %s:",
timestamp(timebuf, sizeof(timebuf)),
server_mode ? "server" : "client");
va_start(args, format);
vfprintf(stdout, format, args);
va_end(args);
fflush(stdout);
}
static void log_error(const char *format, ...)
{
char timebuf[64];
va_list args;
if (quiet)
return;
fprintf(stderr, "%s %s:",
timestamp(timebuf, sizeof(timebuf)),
server_mode ? "server" : "client");
va_start(args, format);
vfprintf(stderr, format, args);
va_end(args);
fflush(stderr);
}
static void log_err_errno(const char *fmt, ...)
{
char timebuf[64];
va_list args;
if (quiet)
return;
fprintf(stderr, "%s %s: ",
timestamp(timebuf, sizeof(timebuf)),
server_mode ? "server" : "client");
va_start(args, fmt);
vfprintf(stderr, fmt, args);
va_end(args);
fprintf(stderr, ": %d: %s\n", errno, strerror(errno));
fflush(stderr);
}
static void log_address(const char *desc, struct sockaddr *sa)
{
char addrstr[64];
if (quiet)
return;
if (sa->sa_family == AF_INET) {
struct sockaddr_in *s = (struct sockaddr_in *) sa;
log_msg("%s %s:%d\n",
desc,
inet_ntop(AF_INET, &s->sin_addr, addrstr,
sizeof(addrstr)),
ntohs(s->sin_port));
} else if (sa->sa_family == AF_INET6) {
struct sockaddr_in6 *s6 = (struct sockaddr_in6 *) sa;
log_msg("%s [%s]:%d\n",
desc,
inet_ntop(AF_INET6, &s6->sin6_addr, addrstr,
sizeof(addrstr)),
ntohs(s6->sin6_port));
}
fflush(stdout);
}
static int switch_ns(const char *ns)
{
char path[PATH_MAX];
int fd, ret;
if (geteuid())
log_error("warning: likely need root to set netns %s!\n", ns);
snprintf(path, sizeof(path), "%s%s", NS_PREFIX, ns);
fd = open(path, 0);
if (fd < 0) {
log_err_errno("Failed to open netns path; can not switch netns");
return 1;
}
ret = setns(fd, CLONE_NEWNET);
close(fd);
return ret;
}
static int tcp_md5sig(int sd, void *addr, socklen_t alen, struct sock_args *args)
{
int keylen = strlen(args->password);
struct tcp_md5sig md5sig = {};
int opt = TCP_MD5SIG;
int rc;
md5sig.tcpm_keylen = keylen;
memcpy(md5sig.tcpm_key, args->password, keylen);
if (args->prefix_len) {
opt = TCP_MD5SIG_EXT;
md5sig.tcpm_flags |= TCP_MD5SIG_FLAG_PREFIX;
md5sig.tcpm_prefixlen = args->prefix_len;
addr = &args->md5_prefix;
}
memcpy(&md5sig.tcpm_addr, addr, alen);
if ((args->ifindex && args->bind_key_ifindex >= 0) || args->bind_key_ifindex >= 1) {
opt = TCP_MD5SIG_EXT;
md5sig.tcpm_flags |= TCP_MD5SIG_FLAG_IFINDEX;
md5sig.tcpm_ifindex = args->ifindex;
log_msg("TCP_MD5SIG_FLAG_IFINDEX set tcpm_ifindex=%d\n", md5sig.tcpm_ifindex);
} else {
log_msg("TCP_MD5SIG_FLAG_IFINDEX off\n", md5sig.tcpm_ifindex);
}
rc = setsockopt(sd, IPPROTO_TCP, opt, &md5sig, sizeof(md5sig));
if (rc < 0) {
/* ENOENT is harmless. Returned when a password is cleared */
if (errno == ENOENT)
rc = 0;
else
log_err_errno("setsockopt(TCP_MD5SIG)");
}
return rc;
}
static int tcp_md5_remote(int sd, struct sock_args *args)
{
struct sockaddr_in sin = {
.sin_family = AF_INET,
};
struct sockaddr_in6 sin6 = {
.sin6_family = AF_INET6,
};
void *addr;
int alen;
switch (args->version) {
case AF_INET:
sin.sin_port = htons(args->port);
sin.sin_addr = args->md5_prefix.v4.sin_addr;
addr = &sin;
alen = sizeof(sin);
break;
case AF_INET6:
sin6.sin6_port = htons(args->port);
sin6.sin6_addr = args->md5_prefix.v6.sin6_addr;
addr = &sin6;
alen = sizeof(sin6);
break;
default:
log_error("unknown address family\n");
exit(1);
}
if (tcp_md5sig(sd, addr, alen, args))
return -1;
return 0;
}
static int get_ifidx(const char *ifname)
{
struct ifreq ifdata;
int sd, rc;
if (!ifname || *ifname == '\0')
return -1;
memset(&ifdata, 0, sizeof(ifdata));
strcpy(ifdata.ifr_name, ifname);
sd = socket(PF_INET, SOCK_DGRAM, IPPROTO_IP);
if (sd < 0) {
log_err_errno("socket failed");
return -1;
}
rc = ioctl(sd, SIOCGIFINDEX, (char *)&ifdata);
close(sd);
if (rc != 0) {
log_err_errno("ioctl(SIOCGIFINDEX) failed");
return -1;
}
return ifdata.ifr_ifindex;
}
static int bind_to_device(int sd, const char *name)
{
int rc;
rc = setsockopt(sd, SOL_SOCKET, SO_BINDTODEVICE, name, strlen(name)+1);
if (rc < 0)
log_err_errno("setsockopt(SO_BINDTODEVICE)");
return rc;
}
static int get_bind_to_device(int sd, char *name, size_t len)
{
int rc;
socklen_t optlen = len;
name[0] = '\0';
rc = getsockopt(sd, SOL_SOCKET, SO_BINDTODEVICE, name, &optlen);
if (rc < 0)
log_err_errno("setsockopt(SO_BINDTODEVICE)");
return rc;
}
static int check_device(int sd, struct sock_args *args)
{
int ifindex = 0;
char name[32];
if (get_bind_to_device(sd, name, sizeof(name)))
*name = '\0';
else
ifindex = get_ifidx(name);
log_msg(" bound to device %s/%d\n",
*name ? name : "<none>", ifindex);
if (!args->expected_ifindex)
return 0;
if (args->expected_ifindex != ifindex) {
log_error("Device index mismatch: expected %d have %d\n",
args->expected_ifindex, ifindex);
return 1;
}
log_msg("Device index matches: expected %d have %d\n",
args->expected_ifindex, ifindex);
return 0;
}
static int set_pktinfo_v4(int sd)
{
int one = 1;
int rc;
rc = setsockopt(sd, SOL_IP, IP_PKTINFO, &one, sizeof(one));
if (rc < 0 && rc != -ENOTSUP)
log_err_errno("setsockopt(IP_PKTINFO)");
return rc;
}
static int set_recvpktinfo_v6(int sd)
{
int one = 1;
int rc;
rc = setsockopt(sd, SOL_IPV6, IPV6_RECVPKTINFO, &one, sizeof(one));
if (rc < 0 && rc != -ENOTSUP)
log_err_errno("setsockopt(IPV6_RECVPKTINFO)");
return rc;
}
static int set_recverr_v4(int sd)
{
int one = 1;
int rc;
rc = setsockopt(sd, SOL_IP, IP_RECVERR, &one, sizeof(one));
if (rc < 0 && rc != -ENOTSUP)
log_err_errno("setsockopt(IP_RECVERR)");
return rc;
}
static int set_recverr_v6(int sd)
{
int one = 1;
int rc;
rc = setsockopt(sd, SOL_IPV6, IPV6_RECVERR, &one, sizeof(one));
if (rc < 0 && rc != -ENOTSUP)
log_err_errno("setsockopt(IPV6_RECVERR)");
return rc;
}
static int set_unicast_if(int sd, int ifindex, int version)
{
int opt = IP_UNICAST_IF;
int level = SOL_IP;
int rc;
ifindex = htonl(ifindex);
if (version == AF_INET6) {
opt = IPV6_UNICAST_IF;
level = SOL_IPV6;
}
rc = setsockopt(sd, level, opt, &ifindex, sizeof(ifindex));
if (rc < 0)
log_err_errno("setsockopt(IP_UNICAST_IF)");
return rc;
}
static int set_multicast_if(int sd, int ifindex)
{
struct ip_mreqn mreq = { .imr_ifindex = ifindex };
int rc;
rc = setsockopt(sd, SOL_IP, IP_MULTICAST_IF, &mreq, sizeof(mreq));
if (rc < 0)
log_err_errno("setsockopt(IP_MULTICAST_IF)");
return rc;
}
static int set_membership(int sd, uint32_t grp, uint32_t addr, int ifindex)
{
uint32_t if_addr = addr;
struct ip_mreqn mreq;
int rc;
if (addr == htonl(INADDR_ANY) && !ifindex) {
log_error("Either local address or device needs to be given for multicast membership\n");
return -1;
}
mreq.imr_multiaddr.s_addr = grp;
mreq.imr_address.s_addr = if_addr;
mreq.imr_ifindex = ifindex;
rc = setsockopt(sd, IPPROTO_IP, IP_ADD_MEMBERSHIP, &mreq, sizeof(mreq));
if (rc < 0) {
log_err_errno("setsockopt(IP_ADD_MEMBERSHIP)");
return -1;
}
return 0;
}
static int set_freebind(int sd, int version)
{
unsigned int one = 1;
int rc = 0;
switch (version) {
case AF_INET:
if (setsockopt(sd, SOL_IP, IP_FREEBIND, &one, sizeof(one))) {
log_err_errno("setsockopt(IP_FREEBIND)");
rc = -1;
}
break;
case AF_INET6:
if (setsockopt(sd, SOL_IPV6, IPV6_FREEBIND, &one, sizeof(one))) {
log_err_errno("setsockopt(IPV6_FREEBIND");
rc = -1;
}
break;
}
return rc;
}
static int set_broadcast(int sd)
{
unsigned int one = 1;
int rc = 0;
if (setsockopt(sd, SOL_SOCKET, SO_BROADCAST, &one, sizeof(one)) != 0) {
log_err_errno("setsockopt(SO_BROADCAST)");
rc = -1;
}
return rc;
}
static int set_reuseport(int sd)
{
unsigned int one = 1;
int rc = 0;
if (setsockopt(sd, SOL_SOCKET, SO_REUSEPORT, &one, sizeof(one)) != 0) {
log_err_errno("setsockopt(SO_REUSEPORT)");
rc = -1;
}
return rc;
}
static int set_reuseaddr(int sd)
{
unsigned int one = 1;
int rc = 0;
if (setsockopt(sd, SOL_SOCKET, SO_REUSEADDR, &one, sizeof(one)) != 0) {
log_err_errno("setsockopt(SO_REUSEADDR)");
rc = -1;
}
return rc;
}
static int set_dsfield(int sd, int version, int dsfield)
{
if (!dsfield)
return 0;
switch (version) {
case AF_INET:
if (setsockopt(sd, SOL_IP, IP_TOS, &dsfield,
sizeof(dsfield)) < 0) {
log_err_errno("setsockopt(IP_TOS)");
return -1;
}
break;
case AF_INET6:
if (setsockopt(sd, SOL_IPV6, IPV6_TCLASS, &dsfield,
sizeof(dsfield)) < 0) {
log_err_errno("setsockopt(IPV6_TCLASS)");
return -1;
}
break;
default:
log_error("Invalid address family\n");
return -1;
}
return 0;
}
static int set_dontroute(int sd)
{
unsigned int one = 1;
if (setsockopt(sd, SOL_SOCKET, SO_DONTROUTE, &one, sizeof(one)) < 0) {
log_err_errno("setsockopt(SO_DONTROUTE)");
return -1;
}
return 0;
}
static int str_to_uint(const char *str, int min, int max, unsigned int *value)
{
int number;
char *end;
errno = 0;
number = (unsigned int) strtoul(str, &end, 0);
/* entire string should be consumed by conversion
* and value should be between min and max
*/
if (((*end == '\0') || (*end == '\n')) && (end != str) &&
(errno != ERANGE) && (min <= number) && (number <= max)) {
*value = number;
return 0;
}
return -1;
}
static int resolve_devices(struct sock_args *args)
{
if (args->dev) {
args->ifindex = get_ifidx(args->dev);
if (args->ifindex < 0) {
log_error("Invalid device name\n");
return 1;
}
}
if (args->expected_dev) {
unsigned int tmp;
if (str_to_uint(args->expected_dev, 0, INT_MAX, &tmp) == 0) {
args->expected_ifindex = (int)tmp;
} else {
args->expected_ifindex = get_ifidx(args->expected_dev);
if (args->expected_ifindex < 0) {
fprintf(stderr, "Invalid expected device\n");
return 1;
}
}
}
return 0;
}
static int expected_addr_match(struct sockaddr *sa, void *expected,
const char *desc)
{
char addrstr[64];
int rc = 0;
if (sa->sa_family == AF_INET) {
struct sockaddr_in *s = (struct sockaddr_in *) sa;
struct in_addr *exp_in = (struct in_addr *) expected;
if (s->sin_addr.s_addr != exp_in->s_addr) {
log_error("%s address does not match expected %s\n",
desc,
inet_ntop(AF_INET, exp_in,
addrstr, sizeof(addrstr)));
rc = 1;
}
} else if (sa->sa_family == AF_INET6) {
struct sockaddr_in6 *s6 = (struct sockaddr_in6 *) sa;
struct in6_addr *exp_in = (struct in6_addr *) expected;
if (memcmp(&s6->sin6_addr, exp_in, sizeof(*exp_in))) {
log_error("%s address does not match expected %s\n",
desc,
inet_ntop(AF_INET6, exp_in,
addrstr, sizeof(addrstr)));
rc = 1;
}
} else {
log_error("%s address does not match expected - unknown family\n",
desc);
rc = 1;
}
if (!rc)
log_msg("%s address matches expected\n", desc);
return rc;
}
static int show_sockstat(int sd, struct sock_args *args)
{
struct sockaddr_in6 local_addr, remote_addr;
socklen_t alen = sizeof(local_addr);
struct sockaddr *sa;
const char *desc;
int rc = 0;
desc = server_mode ? "server local:" : "client local:";
sa = (struct sockaddr *) &local_addr;
if (getsockname(sd, sa, &alen) == 0) {
log_address(desc, sa);
if (args->has_expected_laddr) {
rc = expected_addr_match(sa, &args->expected_laddr,
"local");
}
} else {
log_err_errno("getsockname failed");
}
sa = (struct sockaddr *) &remote_addr;
desc = server_mode ? "server peer:" : "client peer:";
if (getpeername(sd, sa, &alen) == 0) {
log_address(desc, sa);
if (args->has_expected_raddr) {
rc |= expected_addr_match(sa, &args->expected_raddr,
"remote");
}
} else {
log_err_errno("getpeername failed");
}
return rc;
}
enum addr_type {
ADDR_TYPE_LOCAL,
ADDR_TYPE_REMOTE,
ADDR_TYPE_MCAST,
ADDR_TYPE_EXPECTED_LOCAL,
ADDR_TYPE_EXPECTED_REMOTE,
ADDR_TYPE_MD5_PREFIX,
};
static int convert_addr(struct sock_args *args, const char *_str,
enum addr_type atype)
{
int pfx_len_max = args->version == AF_INET6 ? 128 : 32;
int family = args->version;
char *str, *dev, *sep;
struct in6_addr *in6;
struct in_addr *in;
const char *desc;
void *addr;
int rc = 0;
str = strdup(_str);
if (!str)
return -ENOMEM;
switch (atype) {
case ADDR_TYPE_LOCAL:
desc = "local";
addr = &args->local_addr;
break;
case ADDR_TYPE_REMOTE:
desc = "remote";
addr = &args->remote_addr;
break;
case ADDR_TYPE_MCAST:
desc = "mcast grp";
addr = &args->grp;
break;
case ADDR_TYPE_EXPECTED_LOCAL:
desc = "expected local";
addr = &args->expected_laddr;
break;
case ADDR_TYPE_EXPECTED_REMOTE:
desc = "expected remote";
addr = &args->expected_raddr;
break;
case ADDR_TYPE_MD5_PREFIX:
desc = "md5 prefix";
if (family == AF_INET) {
args->md5_prefix.v4.sin_family = AF_INET;
addr = &args->md5_prefix.v4.sin_addr;
} else if (family == AF_INET6) {
args->md5_prefix.v6.sin6_family = AF_INET6;
addr = &args->md5_prefix.v6.sin6_addr;
} else
return 1;
sep = strchr(str, '/');
if (sep) {
*sep = '\0';
sep++;
if (str_to_uint(sep, 1, pfx_len_max,
&args->prefix_len) != 0) {
fprintf(stderr, "Invalid port\n");
return 1;
}
} else {
args->prefix_len = 0;
}
break;
default:
log_error("unknown address type\n");
exit(1);
}
switch (family) {
case AF_INET:
in = (struct in_addr *) addr;
if (str) {
if (inet_pton(AF_INET, str, in) == 0) {
log_error("Invalid %s IP address\n", desc);
rc = -1;
goto out;
}
} else {
in->s_addr = htonl(INADDR_ANY);
}
break;
case AF_INET6:
dev = strchr(str, '%');
if (dev) {
*dev = '\0';
dev++;
}
in6 = (struct in6_addr *) addr;
if (str) {
if (inet_pton(AF_INET6, str, in6) == 0) {
log_error("Invalid %s IPv6 address\n", desc);
rc = -1;
goto out;
}
} else {
*in6 = in6addr_any;
}
if (dev) {
args->scope_id = get_ifidx(dev);
if (args->scope_id < 0) {
log_error("Invalid scope on %s IPv6 address\n",
desc);
rc = -1;
goto out;
}
}
break;
default:
log_error("Invalid address family\n");
}
out:
free(str);
return rc;
}
static int validate_addresses(struct sock_args *args)
{
if (args->local_addr_str &&
convert_addr(args, args->local_addr_str, ADDR_TYPE_LOCAL) < 0)
return 1;
if (args->remote_addr_str &&
convert_addr(args, args->remote_addr_str, ADDR_TYPE_REMOTE) < 0)
return 1;
if (args->md5_prefix_str &&
convert_addr(args, args->md5_prefix_str,
ADDR_TYPE_MD5_PREFIX) < 0)
return 1;
if (args->expected_laddr_str &&
convert_addr(args, args->expected_laddr_str,
ADDR_TYPE_EXPECTED_LOCAL))
return 1;
if (args->expected_raddr_str &&
convert_addr(args, args->expected_raddr_str,
ADDR_TYPE_EXPECTED_REMOTE))
return 1;
return 0;
}
static int get_index_from_cmsg(struct msghdr *m)
{
struct cmsghdr *cm;
int ifindex = 0;
char buf[64];
for (cm = (struct cmsghdr *)CMSG_FIRSTHDR(m);
m->msg_controllen != 0 && cm;
cm = (struct cmsghdr *)CMSG_NXTHDR(m, cm)) {
if (cm->cmsg_level == SOL_IP &&
cm->cmsg_type == IP_PKTINFO) {
struct in_pktinfo *pi;
pi = (struct in_pktinfo *)(CMSG_DATA(cm));
inet_ntop(AF_INET, &pi->ipi_addr, buf, sizeof(buf));
ifindex = pi->ipi_ifindex;
} else if (cm->cmsg_level == SOL_IPV6 &&
cm->cmsg_type == IPV6_PKTINFO) {
struct in6_pktinfo *pi6;
pi6 = (struct in6_pktinfo *)(CMSG_DATA(cm));
inet_ntop(AF_INET6, &pi6->ipi6_addr, buf, sizeof(buf));
ifindex = pi6->ipi6_ifindex;
}
}
if (ifindex) {
log_msg(" pktinfo: ifindex %d dest addr %s\n",
ifindex, buf);
}
return ifindex;
}
static int send_msg_no_cmsg(int sd, void *addr, socklen_t alen)
{
int err;
again:
err = sendto(sd, msg, msglen, 0, addr, alen);
if (err < 0) {
if (errno == EACCES && try_broadcast) {
try_broadcast = 0;
if (!set_broadcast(sd))
goto again;
errno = EACCES;
}
log_err_errno("sendto failed");
return 1;
}
return 0;
}
static int send_msg_cmsg(int sd, void *addr, socklen_t alen,
int ifindex, int version)
{
unsigned char cmsgbuf[64];
struct iovec iov[2];
struct cmsghdr *cm;
struct msghdr m;
int err;
iov[0].iov_base = msg;
iov[0].iov_len = msglen;
m.msg_iov = iov;
m.msg_iovlen = 1;
m.msg_name = (caddr_t)addr;
m.msg_namelen = alen;
memset(cmsgbuf, 0, sizeof(cmsgbuf));
cm = (struct cmsghdr *)cmsgbuf;
m.msg_control = (caddr_t)cm;
if (version == AF_INET) {
struct in_pktinfo *pi;
cm->cmsg_level = SOL_IP;
cm->cmsg_type = IP_PKTINFO;
cm->cmsg_len = CMSG_LEN(sizeof(struct in_pktinfo));
pi = (struct in_pktinfo *)(CMSG_DATA(cm));
pi->ipi_ifindex = ifindex;
m.msg_controllen = cm->cmsg_len;
} else if (version == AF_INET6) {
struct in6_pktinfo *pi6;
cm->cmsg_level = SOL_IPV6;
cm->cmsg_type = IPV6_PKTINFO;
cm->cmsg_len = CMSG_LEN(sizeof(struct in6_pktinfo));
pi6 = (struct in6_pktinfo *)(CMSG_DATA(cm));
pi6->ipi6_ifindex = ifindex;
m.msg_controllen = cm->cmsg_len;
}
again:
err = sendmsg(sd, &m, 0);
if (err < 0) {
if (errno == EACCES && try_broadcast) {
try_broadcast = 0;
if (!set_broadcast(sd))
goto again;
errno = EACCES;
}
log_err_errno("sendmsg failed");
return 1;
}
return 0;
}
static int send_msg(int sd, void *addr, socklen_t alen, struct sock_args *args)
{
if (args->type == SOCK_STREAM) {
if (write(sd, msg, msglen) < 0) {
log_err_errno("write failed sending msg to peer");
return 1;
}
} else if (args->datagram_connect) {
if (send(sd, msg, msglen, 0) < 0) {
log_err_errno("send failed sending msg to peer");
return 1;
}
} else if (args->ifindex && args->use_cmsg) {
if (send_msg_cmsg(sd, addr, alen, args->ifindex, args->version))
return 1;
} else {
if (send_msg_no_cmsg(sd, addr, alen))
return 1;
}
log_msg("Sent message:\n");
log_msg(" %.24s%s\n", msg, msglen > 24 ? " ..." : "");
return 0;
}
static int socket_read_dgram(int sd, struct sock_args *args)
{
unsigned char addr[sizeof(struct sockaddr_in6)];
struct sockaddr *sa = (struct sockaddr *) addr;
socklen_t alen = sizeof(addr);
struct iovec iov[2];
struct msghdr m = {
.msg_name = (caddr_t)addr,
.msg_namelen = alen,
.msg_iov = iov,
.msg_iovlen = 1,
};
unsigned char cmsgbuf[256];
struct cmsghdr *cm = (struct cmsghdr *)cmsgbuf;
char buf[16*1024];
int ifindex;
int len;
iov[0].iov_base = (caddr_t)buf;
iov[0].iov_len = sizeof(buf);
memset(cmsgbuf, 0, sizeof(cmsgbuf));
m.msg_control = (caddr_t)cm;
m.msg_controllen = sizeof(cmsgbuf);
len = recvmsg(sd, &m, 0);
if (len == 0) {
log_msg("peer closed connection.\n");
return 0;
} else if (len < 0) {
log_msg("failed to read message: %d: %s\n",
errno, strerror(errno));
return -1;
}
buf[len] = '\0';
log_address("Message from:", sa);
log_msg(" %.24s%s\n", buf, len > 24 ? " ..." : "");
ifindex = get_index_from_cmsg(&m);
if (args->expected_ifindex) {
if (args->expected_ifindex != ifindex) {
log_error("Device index mismatch: expected %d have %d\n",
args->expected_ifindex, ifindex);
return -1;
}
log_msg("Device index matches: expected %d have %d\n",
args->expected_ifindex, ifindex);
}
if (!interactive && server_mode) {
if (sa->sa_family == AF_INET6) {
struct sockaddr_in6 *s6 = (struct sockaddr_in6 *) sa;
struct in6_addr *in6 = &s6->sin6_addr;
if (IN6_IS_ADDR_V4MAPPED(in6)) {
const uint32_t *pa = (uint32_t *) &in6->s6_addr;
struct in_addr in4;
struct sockaddr_in *sin;
sin = (struct sockaddr_in *) addr;
pa += 3;
in4.s_addr = *pa;
sin->sin_addr = in4;
sin->sin_family = AF_INET;
if (send_msg_cmsg(sd, addr, alen,
ifindex, AF_INET) < 0)
goto out_err;
}
}
again:
iov[0].iov_len = len;
if (args->version == AF_INET6) {
struct sockaddr_in6 *s6 = (struct sockaddr_in6 *) sa;
if (args->dev) {
/* avoid PKTINFO conflicts with bindtodev */
if (sendto(sd, buf, len, 0,
(void *) addr, alen) < 0)
goto out_err;
} else {
/* kernel is allowing scope_id to be set to VRF
* index for LLA. for sends to global address
* reset scope id
*/
s6->sin6_scope_id = ifindex;
if (sendmsg(sd, &m, 0) < 0)
goto out_err;
}
} else {
int err;
err = sendmsg(sd, &m, 0);
if (err < 0) {
if (errno == EACCES && try_broadcast) {
try_broadcast = 0;
if (!set_broadcast(sd))
goto again;
errno = EACCES;
}
goto out_err;
}
}
log_msg("Sent message:\n");
log_msg(" %.24s%s\n", buf, len > 24 ? " ..." : "");
}
return 1;
out_err:
log_err_errno("failed to send msg to peer");
return -1;
}
static int socket_read_stream(int sd)
{
char buf[1024];
int len;
len = read(sd, buf, sizeof(buf)-1);
if (len == 0) {
log_msg("client closed connection.\n");
return 0;
} else if (len < 0) {
log_msg("failed to read message\n");
return -1;
}
buf[len] = '\0';
log_msg("Incoming message:\n");
log_msg(" %.24s%s\n", buf, len > 24 ? " ..." : "");
if (!interactive && server_mode) {
if (write(sd, buf, len) < 0) {
log_err_errno("failed to send buf");
return -1;
}
log_msg("Sent message:\n");
log_msg(" %.24s%s\n", buf, len > 24 ? " ..." : "");
}
return 1;
}
static int socket_read(int sd, struct sock_args *args)
{
if (args->type == SOCK_STREAM)
return socket_read_stream(sd);
return socket_read_dgram(sd, args);
}
static int stdin_to_socket(int sd, int type, void *addr, socklen_t alen)
{
char buf[1024];
int len;
if (fgets(buf, sizeof(buf), stdin) == NULL)
return 0;
len = strlen(buf);
if (type == SOCK_STREAM) {
if (write(sd, buf, len) < 0) {
log_err_errno("failed to send buf");
return -1;
}
} else {
int err;
again:
err = sendto(sd, buf, len, 0, addr, alen);
if (err < 0) {
if (errno == EACCES && try_broadcast) {
try_broadcast = 0;
if (!set_broadcast(sd))
goto again;
errno = EACCES;
}
log_err_errno("failed to send msg to peer");
return -1;
}
}
log_msg("Sent message:\n");
log_msg(" %.24s%s\n", buf, len > 24 ? " ..." : "");
return 1;
}
static void set_recv_attr(int sd, int version)
{
if (version == AF_INET6) {
set_recvpktinfo_v6(sd);
set_recverr_v6(sd);
} else {
set_pktinfo_v4(sd);
set_recverr_v4(sd);
}
}
static int msg_loop(int client, int sd, void *addr, socklen_t alen,
struct sock_args *args)
{
struct timeval timeout = { .tv_sec = prog_timeout }, *ptval = NULL;
fd_set rfds;
int nfds;
int rc;
if (args->type != SOCK_STREAM)
set_recv_attr(sd, args->version);
if (msg) {
msglen = strlen(msg);
/* client sends first message */
if (client) {
if (send_msg(sd, addr, alen, args))
return 1;
}
if (!interactive) {
ptval = &timeout;
if (!prog_timeout)
timeout.tv_sec = 5;
}
}
nfds = interactive ? MAX(fileno(stdin), sd) + 1 : sd + 1;
while (1) {
FD_ZERO(&rfds);
FD_SET(sd, &rfds);
if (interactive)
FD_SET(fileno(stdin), &rfds);
rc = select(nfds, &rfds, NULL, NULL, ptval);
if (rc < 0) {
if (errno == EINTR)
continue;
rc = 1;
log_err_errno("select failed");
break;
} else if (rc == 0) {
log_error("Timed out waiting for response\n");
rc = 2;
break;
}
if (FD_ISSET(sd, &rfds)) {
rc = socket_read(sd, args);
if (rc < 0) {
rc = 1;
break;
}
if (rc == 0)
break;
}
rc = 0;
if (FD_ISSET(fileno(stdin), &rfds)) {
if (stdin_to_socket(sd, args->type, addr, alen) <= 0)
break;
}
if (interactive)
continue;
if (iter != -1) {
--iter;
if (iter == 0)
break;
}
log_msg("Going into quiet mode\n");
quiet = 1;
if (client) {
if (send_msg(sd, addr, alen, args)) {
rc = 1;
break;
}
}
}
return rc;
}
static int msock_init(struct sock_args *args, int server)
{
uint32_t if_addr = htonl(INADDR_ANY);
struct sockaddr_in laddr = {
.sin_family = AF_INET,
.sin_port = htons(args->port),
};
int one = 1;
int sd;
if (!server && args->has_local_ip)
if_addr = args->local_addr.in.s_addr;
sd = socket(PF_INET, SOCK_DGRAM, 0);
if (sd < 0) {
log_err_errno("socket");
return -1;
}
if (setsockopt(sd, SOL_SOCKET, SO_REUSEADDR,
(char *)&one, sizeof(one)) < 0) {
log_err_errno("Setting SO_REUSEADDR error");
goto out_err;
}
if (setsockopt(sd, SOL_SOCKET, SO_BROADCAST,
(char *)&one, sizeof(one)) < 0)
log_err_errno("Setting SO_BROADCAST error");
if (set_dsfield(sd, AF_INET, args->dsfield) != 0)
goto out_err;
if (server) {
if (args->server_dontroute && set_dontroute(sd) != 0)
goto out_err;
} else {
if (args->client_dontroute && set_dontroute(sd) != 0)
goto out_err;
}
if (args->dev && bind_to_device(sd, args->dev) != 0)
goto out_err;
else if (args->use_setsockopt &&
set_multicast_if(sd, args->ifindex))
goto out_err;
laddr.sin_addr.s_addr = if_addr;
if (bind(sd, (struct sockaddr *) &laddr, sizeof(laddr)) < 0) {
log_err_errno("bind failed");
goto out_err;
}
if (server &&
set_membership(sd, args->grp.s_addr,
args->local_addr.in.s_addr, args->ifindex))
goto out_err;
return sd;
out_err:
close(sd);
return -1;
}
static int msock_server(struct sock_args *args)
{
return msock_init(args, 1);
}
static int msock_client(struct sock_args *args)
{
return msock_init(args, 0);
}
static int bind_socket(int sd, struct sock_args *args)
{
struct sockaddr_in serv_addr = {
.sin_family = AF_INET,
};
struct sockaddr_in6 serv6_addr = {
.sin6_family = AF_INET6,
};
void *addr;
socklen_t alen;
if (!args->has_local_ip && args->type == SOCK_RAW)
return 0;
switch (args->version) {
case AF_INET:
serv_addr.sin_port = htons(args->port);
serv_addr.sin_addr = args->local_addr.in;
addr = &serv_addr;
alen = sizeof(serv_addr);
break;
case AF_INET6:
serv6_addr.sin6_port = htons(args->port);
serv6_addr.sin6_addr = args->local_addr.in6;
addr = &serv6_addr;
alen = sizeof(serv6_addr);
break;
default:
log_error("Invalid address family\n");
return -1;
}
if (bind(sd, addr, alen) < 0) {
log_err_errno("error binding socket");
return -1;
}
return 0;
}
static int config_xfrm_policy(int sd, struct sock_args *args)
{
struct xfrm_userpolicy_info policy = {};
int type = UDP_ENCAP_ESPINUDP;
int xfrm_af = IP_XFRM_POLICY;
int level = SOL_IP;
if (args->type != SOCK_DGRAM) {
log_error("Invalid socket type. Only DGRAM could be used for XFRM\n");
return 1;
}
policy.action = XFRM_POLICY_ALLOW;
policy.sel.family = args->version;
if (args->version == AF_INET6) {
xfrm_af = IPV6_XFRM_POLICY;
level = SOL_IPV6;
}
policy.dir = XFRM_POLICY_OUT;
if (setsockopt(sd, level, xfrm_af, &policy, sizeof(policy)) < 0)
return 1;
policy.dir = XFRM_POLICY_IN;
if (setsockopt(sd, level, xfrm_af, &policy, sizeof(policy)) < 0)
return 1;
if (setsockopt(sd, IPPROTO_UDP, UDP_ENCAP, &type, sizeof(type)) < 0) {
log_err_errno("Failed to set xfrm encap");
return 1;
}
return 0;
}
static int lsock_init(struct sock_args *args)
{
long flags;
int sd;
sd = socket(args->version, args->type, args->protocol);
if (sd < 0) {
log_err_errno("Error opening socket");
return -1;
}
if (set_reuseaddr(sd) != 0)
goto err;
if (set_reuseport(sd) != 0)
goto err;
if (set_dsfield(sd, args->version, args->dsfield) != 0)
goto err;
if (args->server_dontroute && set_dontroute(sd) != 0)
goto err;
if (args->dev && bind_to_device(sd, args->dev) != 0)
goto err;
else if (args->use_setsockopt &&
set_unicast_if(sd, args->ifindex, args->version))
goto err;
if (args->use_freebind && set_freebind(sd, args->version))
goto err;
if (bind_socket(sd, args))
goto err;
if (args->bind_test_only)
goto out;
if (args->type == SOCK_STREAM && listen(sd, 1) < 0) {
log_err_errno("listen failed");
goto err;
}
flags = fcntl(sd, F_GETFL);
if ((flags < 0) || (fcntl(sd, F_SETFL, flags|O_NONBLOCK) < 0)) {
log_err_errno("Failed to set non-blocking option");
goto err;
}
if (fcntl(sd, F_SETFD, FD_CLOEXEC) < 0)
log_err_errno("Failed to set close-on-exec flag");
if (args->use_xfrm && config_xfrm_policy(sd, args)) {
log_err_errno("Failed to set xfrm policy");
goto err;
}
out:
return sd;
err:
close(sd);
return -1;
}
static void ipc_write(int fd, int message)
{
/* Not in both_mode, so there's no process to signal */
if (fd < 0)
return;
if (write(fd, &message, sizeof(message)) < 0)
log_err_errno("Failed to send client status");
}
static int do_server(struct sock_args *args, int ipc_fd)
{
/* ipc_fd = -1 if no parent process to signal */
struct timeval timeout = { .tv_sec = prog_timeout }, *ptval = NULL;
unsigned char addr[sizeof(struct sockaddr_in6)] = {};
socklen_t alen = sizeof(addr);
int lsd, csd = -1;
fd_set rfds;
int rc;
if (args->serverns) {
if (switch_ns(args->serverns)) {
log_error("Could not set server netns to %s\n",
args->serverns);
goto err_exit;
}
log_msg("Switched server netns\n");
}
args->dev = args->server_dev;
args->expected_dev = args->expected_server_dev;
if (resolve_devices(args) || validate_addresses(args))
goto err_exit;
if (prog_timeout)
ptval = &timeout;
if (args->has_grp)
lsd = msock_server(args);
else
lsd = lsock_init(args);
if (lsd < 0)
goto err_exit;
if (args->bind_test_only) {
close(lsd);
ipc_write(ipc_fd, 1);
return 0;
}
if (args->type != SOCK_STREAM) {
ipc_write(ipc_fd, 1);
rc = msg_loop(0, lsd, (void *) addr, alen, args);
close(lsd);
return rc;
}
if (args->password && tcp_md5_remote(lsd, args)) {
close(lsd);
goto err_exit;
}
ipc_write(ipc_fd, 1);
while (1) {
log_msg("waiting for client connection.\n");
FD_ZERO(&rfds);
FD_SET(lsd, &rfds);
rc = select(lsd+1, &rfds, NULL, NULL, ptval);
if (rc == 0) {
rc = 2;
break;
}
if (rc < 0) {
if (errno == EINTR)
continue;
log_err_errno("select failed");
break;
}
if (FD_ISSET(lsd, &rfds)) {
csd = accept(lsd, (void *) addr, &alen);
if (csd < 0) {
log_err_errno("accept failed");
break;
}
rc = show_sockstat(csd, args);
if (rc)
break;
rc = check_device(csd, args);
if (rc)
break;
}
rc = msg_loop(0, csd, (void *) addr, alen, args);
close(csd);
if (!interactive)
break;
}
close(lsd);
return rc;
err_exit:
ipc_write(ipc_fd, 0);
return 1;
}
static int wait_for_connect(int sd)
{
struct timeval _tv = { .tv_sec = prog_timeout }, *tv = NULL;
fd_set wfd;
int val = 0, sz = sizeof(val);
int rc;
FD_ZERO(&wfd);
FD_SET(sd, &wfd);
if (prog_timeout)
tv = &_tv;
rc = select(FD_SETSIZE, NULL, &wfd, NULL, tv);
if (rc == 0) {
log_error("connect timed out\n");
return -2;
} else if (rc < 0) {
log_err_errno("select failed");
return -3;
}
if (getsockopt(sd, SOL_SOCKET, SO_ERROR, &val, (socklen_t *)&sz) < 0) {
log_err_errno("getsockopt(SO_ERROR) failed");
return -4;
}
if (val != 0) {
log_error("connect failed: %d: %s\n", val, strerror(val));
return -1;
}
return 0;
}
static int connectsock(void *addr, socklen_t alen, struct sock_args *args)
{
int sd, rc = -1;
long flags;
sd = socket(args->version, args->type, args->protocol);
if (sd < 0) {
log_err_errno("Failed to create socket");
return -1;
}
flags = fcntl(sd, F_GETFL);
if ((flags < 0) || (fcntl(sd, F_SETFL, flags|O_NONBLOCK) < 0)) {
log_err_errno("Failed to set non-blocking option");
goto err;
}
if (set_reuseport(sd) != 0)
goto err;
if (set_dsfield(sd, args->version, args->dsfield) != 0)
goto err;
if (args->client_dontroute && set_dontroute(sd) != 0)
goto err;
if (args->dev && bind_to_device(sd, args->dev) != 0)
goto err;
else if (args->use_setsockopt &&
set_unicast_if(sd, args->ifindex, args->version))
goto err;
if (args->has_local_ip && bind_socket(sd, args))
goto err;
if (args->type != SOCK_STREAM && !args->datagram_connect)
goto out;
if (args->password && tcp_md5sig(sd, addr, alen, args))
goto err;
if (args->bind_test_only)
goto out;
if (connect(sd, addr, alen) < 0) {
if (errno != EINPROGRESS) {
log_err_errno("Failed to connect to remote host");
rc = -1;
goto err;
}
rc = wait_for_connect(sd);
if (rc < 0)
goto err;
}
out:
return sd;
err:
close(sd);
return rc;
}
static int do_client(struct sock_args *args)
{
struct sockaddr_in sin = {
.sin_family = AF_INET,
};
struct sockaddr_in6 sin6 = {
.sin6_family = AF_INET6,
};
void *addr;
int alen;
int rc = 0;
int sd;
if (!args->has_remote_ip && !args->has_grp) {
fprintf(stderr, "remote IP or multicast group not given\n");
return 1;
}
if (args->clientns) {
if (switch_ns(args->clientns)) {
log_error("Could not set client netns to %s\n",
args->clientns);
return 1;
}
log_msg("Switched client netns\n");
}
args->local_addr_str = args->client_local_addr_str;
if (resolve_devices(args) || validate_addresses(args))
return 1;
if ((args->use_setsockopt || args->use_cmsg) && !args->ifindex) {
fprintf(stderr, "Device binding not specified\n");
return 1;
}
if (args->use_setsockopt || args->use_cmsg)
args->dev = NULL;
switch (args->version) {
case AF_INET:
sin.sin_port = htons(args->port);
if (args->has_grp)
sin.sin_addr = args->grp;
else
sin.sin_addr = args->remote_addr.in;
addr = &sin;
alen = sizeof(sin);
break;
case AF_INET6:
sin6.sin6_port = htons(args->port);
sin6.sin6_addr = args->remote_addr.in6;
sin6.sin6_scope_id = args->scope_id;
addr = &sin6;
alen = sizeof(sin6);
break;
}
args->password = args->client_pw;
if (args->has_grp)
sd = msock_client(args);
else
sd = connectsock(addr, alen, args);
if (sd < 0)
return -sd;
if (args->bind_test_only)
goto out;
if (args->type == SOCK_STREAM) {
rc = show_sockstat(sd, args);
if (rc != 0)
goto out;
}
rc = msg_loop(1, sd, addr, alen, args);
out:
close(sd);
return rc;
}
static char *random_msg(int len)
{
int i, n = 0, olen = len + 1;
char *m;
if (len <= 0)
return NULL;
m = malloc(olen);
if (!m)
return NULL;
while (len > 26) {
i = snprintf(m + n, olen - n, "%.26s",
"abcdefghijklmnopqrstuvwxyz");
n += i;
len -= i;
}
i = snprintf(m + n, olen - n, "%.*s", len,
"abcdefghijklmnopqrstuvwxyz");
return m;
}
static int ipc_child(int fd, struct sock_args *args)
{
char *outbuf, *errbuf;
int rc = 1;
outbuf = malloc(4096);
errbuf = malloc(4096);
if (!outbuf || !errbuf) {
fprintf(stderr, "server: Failed to allocate buffers for stdout and stderr\n");
goto out;
}
setbuffer(stdout, outbuf, 4096);
setbuffer(stderr, errbuf, 4096);
server_mode = 1; /* to tell log_msg in case we are in both_mode */
/* when running in both mode, address validation applies
* solely to client side
*/
args->has_expected_laddr = 0;
args->has_expected_raddr = 0;
rc = do_server(args, fd);
out:
free(outbuf);
free(errbuf);
return rc;
}
static int ipc_parent(int cpid, int fd, struct sock_args *args)
{
int client_status;
int status;
int buf;
/* do the client-side function here in the parent process,
* waiting to be told when to continue
*/
if (read(fd, &buf, sizeof(buf)) <= 0) {
log_err_errno("Failed to read IPC status from status");
return 1;
}
if (!buf) {
log_error("Server failed; can not continue\n");
return 1;
}
log_msg("Server is ready\n");
client_status = do_client(args);
log_msg("parent is done!\n");
if (kill(cpid, 0) == 0)
kill(cpid, SIGKILL);
wait(&status);
return client_status;
}
#define GETOPT_STR "sr:l:c:Q:p:t:g:P:DRn:M:X:m:d:I:BN:O:SUCi6xL:0:1:2:3:Fbqf"
#define OPT_FORCE_BIND_KEY_IFINDEX 1001
#define OPT_NO_BIND_KEY_IFINDEX 1002
#define OPT_CLIENT_DONTROUTE 1003
#define OPT_SERVER_DONTROUTE 1004
static struct option long_opts[] = {
{"force-bind-key-ifindex", 0, 0, OPT_FORCE_BIND_KEY_IFINDEX},
{"no-bind-key-ifindex", 0, 0, OPT_NO_BIND_KEY_IFINDEX},
{"client-dontroute", 0, 0, OPT_CLIENT_DONTROUTE},
{"server-dontroute", 0, 0, OPT_SERVER_DONTROUTE},
{0, 0, 0, 0}
};
static void print_usage(char *prog)
{
printf(
"usage: %s OPTS\n"
"Required:\n"
" -r addr remote address to connect to (client mode only)\n"
" -p port port to connect to (client mode)/listen on (server mode)\n"
" (default: %d)\n"
" -s server mode (default: client mode)\n"
" -t timeout seconds (default: none)\n"
"\n"
"Optional:\n"
" -B do both client and server via fork and IPC\n"
" -N ns set client to network namespace ns (requires root)\n"
" -O ns set server to network namespace ns (requires root)\n"
" -F Restart server loop\n"
" -6 IPv6 (default is IPv4)\n"
" -P proto protocol for socket: icmp, ospf (default: none)\n"
" -D|R datagram (D) / raw (R) socket (default stream)\n"
" -l addr local address to bind to in server mode\n"
" -c addr local address to bind to in client mode\n"
" -Q dsfield DS Field value of the socket (the IP_TOS or\n"
" IPV6_TCLASS socket option)\n"
" -x configure XFRM policy on socket\n"
"\n"
" -d dev bind socket to given device name\n"
" -I dev bind socket to given device name - server mode\n"
" -S use setsockopt (IP_UNICAST_IF or IP_MULTICAST_IF)\n"
" to set device binding\n"
" -U Use connect() and send() for datagram sockets\n"
" -f bind socket with the IP[V6]_FREEBIND option\n"
" -C use cmsg and IP_PKTINFO to specify device binding\n"
"\n"
" -L len send random message of given length\n"
" -n num number of times to send message\n"
"\n"
" -M password use MD5 sum protection\n"
" -X password MD5 password for client mode\n"
" -m prefix/len prefix and length to use for MD5 key\n"
" --no-bind-key-ifindex: Force TCP_MD5SIG_FLAG_IFINDEX off\n"
" --force-bind-key-ifindex: Force TCP_MD5SIG_FLAG_IFINDEX on\n"
" (default: only if -I is passed)\n"
" --client-dontroute: don't use gateways for client socket: send\n"
" packets only if destination is on link (see\n"
" SO_DONTROUTE in socket(7))\n"
" --server-dontroute: don't use gateways for server socket: send\n"
" packets only if destination is on link (see\n"
" SO_DONTROUTE in socket(7))\n"
"\n"
" -g grp multicast group (e.g., 239.1.1.1)\n"
" -i interactive mode (default is echo and terminate)\n"
"\n"
" -0 addr Expected local address\n"
" -1 addr Expected remote address\n"
" -2 dev Expected device name (or index) to receive packet\n"
" -3 dev Expected device name (or index) to receive packets - server mode\n"
"\n"
" -b Bind test only.\n"
" -q Be quiet. Run test without printing anything.\n"
, prog, DEFAULT_PORT);
}
int main(int argc, char *argv[])
{
struct sock_args args = {
.version = AF_INET,
.type = SOCK_STREAM,
.port = DEFAULT_PORT,
};
struct protoent *pe;
int both_mode = 0;
unsigned int tmp;
int forever = 0;
int fd[2];
int cpid;
/* process inputs */
extern char *optarg;
int rc = 0;
/*
* process input args
*/
while ((rc = getopt_long(argc, argv, GETOPT_STR, long_opts, NULL)) != -1) {
switch (rc) {
case 'B':
both_mode = 1;
break;
case 's':
server_mode = 1;
break;
case 'F':
forever = 1;
break;
case 'l':
args.has_local_ip = 1;
args.local_addr_str = optarg;
break;
case 'r':
args.has_remote_ip = 1;
args.remote_addr_str = optarg;
break;
case 'c':
args.has_local_ip = 1;
args.client_local_addr_str = optarg;
break;
case 'Q':
if (str_to_uint(optarg, 0, 255, &tmp) != 0) {
fprintf(stderr, "Invalid DS Field\n");
return 1;
}
args.dsfield = tmp;
break;
case 'p':
if (str_to_uint(optarg, 1, 65535, &tmp) != 0) {
fprintf(stderr, "Invalid port\n");
return 1;
}
args.port = (unsigned short) tmp;
break;
case 't':
if (str_to_uint(optarg, 0, INT_MAX,
&prog_timeout) != 0) {
fprintf(stderr, "Invalid timeout\n");
return 1;
}
break;
case 'D':
args.type = SOCK_DGRAM;
break;
case 'R':
args.type = SOCK_RAW;
args.port = 0;
if (!args.protocol)
args.protocol = IPPROTO_RAW;
break;
case 'P':
pe = getprotobyname(optarg);
if (pe) {
args.protocol = pe->p_proto;
} else {
if (str_to_uint(optarg, 0, 0xffff, &tmp) != 0) {
fprintf(stderr, "Invalid protocol\n");
return 1;
}
args.protocol = tmp;
}
break;
case 'n':
iter = atoi(optarg);
break;
case 'N':
args.clientns = optarg;
break;
case 'O':
args.serverns = optarg;
break;
case 'L':
msg = random_msg(atoi(optarg));
break;
case 'M':
args.password = optarg;
break;
case OPT_FORCE_BIND_KEY_IFINDEX:
args.bind_key_ifindex = 1;
break;
case OPT_NO_BIND_KEY_IFINDEX:
args.bind_key_ifindex = -1;
break;
case OPT_CLIENT_DONTROUTE:
args.client_dontroute = 1;
break;
case OPT_SERVER_DONTROUTE:
args.server_dontroute = 1;
break;
case 'X':
args.client_pw = optarg;
break;
case 'm':
args.md5_prefix_str = optarg;
break;
case 'S':
args.use_setsockopt = 1;
break;
case 'f':
args.use_freebind = 1;
break;
case 'C':
args.use_cmsg = 1;
break;
case 'd':
args.dev = optarg;
break;
case 'I':
args.server_dev = optarg;
break;
case 'i':
interactive = 1;
break;
case 'g':
args.has_grp = 1;
if (convert_addr(&args, optarg, ADDR_TYPE_MCAST) < 0)
return 1;
args.type = SOCK_DGRAM;
break;
case '6':
args.version = AF_INET6;
break;
case 'b':
args.bind_test_only = 1;
break;
case '0':
args.has_expected_laddr = 1;
args.expected_laddr_str = optarg;
break;
case '1':
args.has_expected_raddr = 1;
args.expected_raddr_str = optarg;
break;
case '2':
args.expected_dev = optarg;
break;
case '3':
args.expected_server_dev = optarg;
break;
case 'q':
quiet = 1;
break;
case 'x':
args.use_xfrm = 1;
break;
case 'U':
args.datagram_connect = 1;
break;
default:
print_usage(argv[0]);
return 1;
}
}
if (args.password &&
((!args.has_remote_ip && !args.md5_prefix_str) ||
args.type != SOCK_STREAM)) {
log_error("MD5 passwords apply to TCP only and require a remote ip for the password\n");
return 1;
}
if (args.md5_prefix_str && !args.password) {
log_error("Prefix range for MD5 protection specified without a password\n");
return 1;
}
if (iter == 0) {
fprintf(stderr, "Invalid number of messages to send\n");
return 1;
}
if (args.type == SOCK_STREAM && !args.protocol)
args.protocol = IPPROTO_TCP;
if (args.type == SOCK_DGRAM && !args.protocol)
args.protocol = IPPROTO_UDP;
if ((args.type == SOCK_STREAM || args.type == SOCK_DGRAM) &&
args.port == 0) {
fprintf(stderr, "Invalid port number\n");
return 1;
}
if ((both_mode || !server_mode) && !args.has_grp &&
!args.has_remote_ip && !args.has_local_ip) {
fprintf(stderr,
"Local (server mode) or remote IP (client IP) required\n");
return 1;
}
if (interactive) {
prog_timeout = 0;
msg = NULL;
}
if (both_mode) {
if (pipe(fd) < 0) {
perror("pipe");
exit(1);
}
cpid = fork();
if (cpid < 0) {
perror("fork");
exit(1);
}
if (cpid)
return ipc_parent(cpid, fd[0], &args);
return ipc_child(fd[1], &args);
}
if (server_mode) {
do {
rc = do_server(&args, -1);
} while (forever);
return rc;
}
return do_client(&args);
}
| linux-master | tools/testing/selftests/net/nettest.c |
// SPDX-License-Identifier: GPL-2.0
#include <arpa/inet.h>
#include <error.h>
#include <errno.h>
#include <unistd.h>
int main(void)
{
int fd1, fd2, one = 1;
struct sockaddr_in6 bind_addr = {
.sin6_family = AF_INET6,
.sin6_port = htons(20000),
.sin6_flowinfo = htonl(0),
.sin6_addr = {},
.sin6_scope_id = 0,
};
inet_pton(AF_INET6, "::", &bind_addr.sin6_addr);
fd1 = socket(AF_INET6, SOCK_STREAM, IPPROTO_IP);
if (fd1 < 0) {
error(1, errno, "socket fd1");
return -1;
}
if (setsockopt(fd1, SOL_SOCKET, SO_REUSEADDR, &one, sizeof(one))) {
error(1, errno, "setsockopt(SO_REUSEADDR) fd1");
goto out_err1;
}
if (bind(fd1, (struct sockaddr *)&bind_addr, sizeof(bind_addr))) {
error(1, errno, "bind fd1");
goto out_err1;
}
if (sendto(fd1, NULL, 0, MSG_FASTOPEN, (struct sockaddr *)&bind_addr,
sizeof(bind_addr))) {
error(1, errno, "sendto fd1");
goto out_err1;
}
fd2 = socket(AF_INET6, SOCK_STREAM, IPPROTO_IP);
if (fd2 < 0) {
error(1, errno, "socket fd2");
goto out_err1;
}
if (setsockopt(fd2, SOL_SOCKET, SO_REUSEADDR, &one, sizeof(one))) {
error(1, errno, "setsockopt(SO_REUSEADDR) fd2");
goto out_err2;
}
if (bind(fd2, (struct sockaddr *)&bind_addr, sizeof(bind_addr))) {
error(1, errno, "bind fd2");
goto out_err2;
}
if (sendto(fd2, NULL, 0, MSG_FASTOPEN, (struct sockaddr *)&bind_addr,
sizeof(bind_addr)) != -1) {
error(1, errno, "sendto fd2");
goto out_err2;
}
if (listen(fd2, 0)) {
error(1, errno, "listen");
goto out_err2;
}
close(fd2);
close(fd1);
return 0;
out_err2:
close(fd2);
out_err1:
close(fd1);
return -1;
}
| linux-master | tools/testing/selftests/net/sk_bind_sendto_listen.c |
// SPDX-License-Identifier: GPL-2.0
#include <stdio.h>
#include <errno.h>
#include <unistd.h>
#include <string.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include "../kselftest.h"
struct socket_testcase {
int domain;
int type;
int protocol;
/* 0 = valid file descriptor
* -foo = error foo
*/
int expect;
/* If non-zero, accept EAFNOSUPPORT to handle the case
* of the protocol not being configured into the kernel.
*/
int nosupport_ok;
};
static struct socket_testcase tests[] = {
{ AF_MAX, 0, 0, -EAFNOSUPPORT, 0 },
{ AF_INET, SOCK_STREAM, IPPROTO_TCP, 0, 1 },
{ AF_INET, SOCK_DGRAM, IPPROTO_TCP, -EPROTONOSUPPORT, 1 },
{ AF_INET, SOCK_DGRAM, IPPROTO_UDP, 0, 1 },
{ AF_INET, SOCK_STREAM, IPPROTO_UDP, -EPROTONOSUPPORT, 1 },
};
#define ERR_STRING_SZ 64
static int run_tests(void)
{
char err_string1[ERR_STRING_SZ];
char err_string2[ERR_STRING_SZ];
int i, err;
err = 0;
for (i = 0; i < ARRAY_SIZE(tests); i++) {
struct socket_testcase *s = &tests[i];
int fd;
fd = socket(s->domain, s->type, s->protocol);
if (fd < 0) {
if (s->nosupport_ok &&
errno == EAFNOSUPPORT)
continue;
if (s->expect < 0 &&
errno == -s->expect)
continue;
strerror_r(-s->expect, err_string1, ERR_STRING_SZ);
strerror_r(errno, err_string2, ERR_STRING_SZ);
fprintf(stderr, "socket(%d, %d, %d) expected "
"err (%s) got (%s)\n",
s->domain, s->type, s->protocol,
err_string1, err_string2);
err = -1;
break;
} else {
close(fd);
if (s->expect < 0) {
strerror_r(errno, err_string1, ERR_STRING_SZ);
fprintf(stderr, "socket(%d, %d, %d) expected "
"success got err (%s)\n",
s->domain, s->type, s->protocol,
err_string1);
err = -1;
break;
}
}
}
return err;
}
int main(void)
{
int err = run_tests();
return err;
}
| linux-master | tools/testing/selftests/net/socket.c |
// SPDX-License-Identifier: GPL-2.0
#define _GNU_SOURCE
#include <errno.h>
#include <fcntl.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <linux/if.h>
#include <linux/if_tun.h>
#include <linux/netlink.h>
#include <linux/rtnetlink.h>
#include <sys/ioctl.h>
#include <sys/socket.h>
#include "../kselftest_harness.h"
static int tun_attach(int fd, char *dev)
{
struct ifreq ifr;
memset(&ifr, 0, sizeof(ifr));
strcpy(ifr.ifr_name, dev);
ifr.ifr_flags = IFF_ATTACH_QUEUE;
return ioctl(fd, TUNSETQUEUE, (void *) &ifr);
}
static int tun_detach(int fd, char *dev)
{
struct ifreq ifr;
memset(&ifr, 0, sizeof(ifr));
strcpy(ifr.ifr_name, dev);
ifr.ifr_flags = IFF_DETACH_QUEUE;
return ioctl(fd, TUNSETQUEUE, (void *) &ifr);
}
static int tun_alloc(char *dev)
{
struct ifreq ifr;
int fd, err;
fd = open("/dev/net/tun", O_RDWR);
if (fd < 0) {
fprintf(stderr, "can't open tun: %s\n", strerror(errno));
return fd;
}
memset(&ifr, 0, sizeof(ifr));
strcpy(ifr.ifr_name, dev);
ifr.ifr_flags = IFF_TAP | IFF_NAPI | IFF_MULTI_QUEUE;
err = ioctl(fd, TUNSETIFF, (void *) &ifr);
if (err < 0) {
fprintf(stderr, "can't TUNSETIFF: %s\n", strerror(errno));
close(fd);
return err;
}
strcpy(dev, ifr.ifr_name);
return fd;
}
static int tun_delete(char *dev)
{
struct {
struct nlmsghdr nh;
struct ifinfomsg ifm;
unsigned char data[64];
} req;
struct rtattr *rta;
int ret, rtnl;
rtnl = socket(AF_NETLINK, SOCK_DGRAM, NETLINK_ROUTE);
if (rtnl < 0) {
fprintf(stderr, "can't open rtnl: %s\n", strerror(errno));
return 1;
}
memset(&req, 0, sizeof(req));
req.nh.nlmsg_len = NLMSG_ALIGN(NLMSG_LENGTH(sizeof(req.ifm)));
req.nh.nlmsg_flags = NLM_F_REQUEST;
req.nh.nlmsg_type = RTM_DELLINK;
req.ifm.ifi_family = AF_UNSPEC;
rta = (struct rtattr *)(((char *)&req) + NLMSG_ALIGN(req.nh.nlmsg_len));
rta->rta_type = IFLA_IFNAME;
rta->rta_len = RTA_LENGTH(IFNAMSIZ);
req.nh.nlmsg_len += rta->rta_len;
memcpy(RTA_DATA(rta), dev, IFNAMSIZ);
ret = send(rtnl, &req, req.nh.nlmsg_len, 0);
if (ret < 0)
fprintf(stderr, "can't send: %s\n", strerror(errno));
ret = (unsigned int)ret != req.nh.nlmsg_len;
close(rtnl);
return ret;
}
FIXTURE(tun)
{
char ifname[IFNAMSIZ];
int fd, fd2;
};
FIXTURE_SETUP(tun)
{
memset(self->ifname, 0, sizeof(self->ifname));
self->fd = tun_alloc(self->ifname);
ASSERT_GE(self->fd, 0);
self->fd2 = tun_alloc(self->ifname);
ASSERT_GE(self->fd2, 0);
}
FIXTURE_TEARDOWN(tun)
{
if (self->fd >= 0)
close(self->fd);
if (self->fd2 >= 0)
close(self->fd2);
}
TEST_F(tun, delete_detach_close) {
EXPECT_EQ(tun_delete(self->ifname), 0);
EXPECT_EQ(tun_detach(self->fd, self->ifname), -1);
EXPECT_EQ(errno, 22);
}
TEST_F(tun, detach_delete_close) {
EXPECT_EQ(tun_detach(self->fd, self->ifname), 0);
EXPECT_EQ(tun_delete(self->ifname), 0);
}
TEST_F(tun, detach_close_delete) {
EXPECT_EQ(tun_detach(self->fd, self->ifname), 0);
close(self->fd);
self->fd = -1;
EXPECT_EQ(tun_delete(self->ifname), 0);
}
TEST_F(tun, reattach_delete_close) {
EXPECT_EQ(tun_detach(self->fd, self->ifname), 0);
EXPECT_EQ(tun_attach(self->fd, self->ifname), 0);
EXPECT_EQ(tun_delete(self->ifname), 0);
}
TEST_F(tun, reattach_close_delete) {
EXPECT_EQ(tun_detach(self->fd, self->ifname), 0);
EXPECT_EQ(tun_attach(self->fd, self->ifname), 0);
close(self->fd);
self->fd = -1;
EXPECT_EQ(tun_delete(self->ifname), 0);
}
TEST_HARNESS_MAIN
| linux-master | tools/testing/selftests/net/tun.c |
/*
* Test functionality of BPF filters for SO_REUSEPORT. The tests below will use
* a BPF program (both classic and extended) to read the first word from an
* incoming packet (expected to be in network byte-order), calculate a modulus
* of that number, and then dispatch the packet to the Nth socket using the
* result. These tests are run for each supported address family and protocol.
* Additionally, a few edge cases in the implementation are tested.
*/
#include <errno.h>
#include <error.h>
#include <fcntl.h>
#include <linux/bpf.h>
#include <linux/filter.h>
#include <linux/unistd.h>
#include <netinet/in.h>
#include <netinet/tcp.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/epoll.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <sys/resource.h>
#include <unistd.h>
#include "../kselftest.h"
struct test_params {
int recv_family;
int send_family;
int protocol;
size_t recv_socks;
uint16_t recv_port;
uint16_t send_port_min;
};
static size_t sockaddr_size(void)
{
return sizeof(struct sockaddr_storage);
}
static struct sockaddr *new_any_sockaddr(int family, uint16_t port)
{
struct sockaddr_storage *addr;
struct sockaddr_in *addr4;
struct sockaddr_in6 *addr6;
addr = malloc(sizeof(struct sockaddr_storage));
memset(addr, 0, sizeof(struct sockaddr_storage));
switch (family) {
case AF_INET:
addr4 = (struct sockaddr_in *)addr;
addr4->sin_family = AF_INET;
addr4->sin_addr.s_addr = htonl(INADDR_ANY);
addr4->sin_port = htons(port);
break;
case AF_INET6:
addr6 = (struct sockaddr_in6 *)addr;
addr6->sin6_family = AF_INET6;
addr6->sin6_addr = in6addr_any;
addr6->sin6_port = htons(port);
break;
default:
error(1, 0, "Unsupported family %d", family);
}
return (struct sockaddr *)addr;
}
static struct sockaddr *new_loopback_sockaddr(int family, uint16_t port)
{
struct sockaddr *addr = new_any_sockaddr(family, port);
struct sockaddr_in *addr4;
struct sockaddr_in6 *addr6;
switch (family) {
case AF_INET:
addr4 = (struct sockaddr_in *)addr;
addr4->sin_addr.s_addr = htonl(INADDR_LOOPBACK);
break;
case AF_INET6:
addr6 = (struct sockaddr_in6 *)addr;
addr6->sin6_addr = in6addr_loopback;
break;
default:
error(1, 0, "Unsupported family %d", family);
}
return addr;
}
static void attach_ebpf(int fd, uint16_t mod)
{
static char bpf_log_buf[65536];
static const char bpf_license[] = "GPL";
int bpf_fd;
const struct bpf_insn prog[] = {
/* BPF_MOV64_REG(BPF_REG_6, BPF_REG_1) */
{ BPF_ALU64 | BPF_MOV | BPF_X, BPF_REG_6, BPF_REG_1, 0, 0 },
/* BPF_LD_ABS(BPF_W, 0) R0 = (uint32_t)skb[0] */
{ BPF_LD | BPF_ABS | BPF_W, 0, 0, 0, 0 },
/* BPF_ALU64_IMM(BPF_MOD, BPF_REG_0, mod) */
{ BPF_ALU64 | BPF_MOD | BPF_K, BPF_REG_0, 0, 0, mod },
/* BPF_EXIT_INSN() */
{ BPF_JMP | BPF_EXIT, 0, 0, 0, 0 }
};
union bpf_attr attr;
memset(&attr, 0, sizeof(attr));
attr.prog_type = BPF_PROG_TYPE_SOCKET_FILTER;
attr.insn_cnt = ARRAY_SIZE(prog);
attr.insns = (unsigned long) &prog;
attr.license = (unsigned long) &bpf_license;
attr.log_buf = (unsigned long) &bpf_log_buf;
attr.log_size = sizeof(bpf_log_buf);
attr.log_level = 1;
attr.kern_version = 0;
bpf_fd = syscall(__NR_bpf, BPF_PROG_LOAD, &attr, sizeof(attr));
if (bpf_fd < 0)
error(1, errno, "ebpf error. log:\n%s\n", bpf_log_buf);
if (setsockopt(fd, SOL_SOCKET, SO_ATTACH_REUSEPORT_EBPF, &bpf_fd,
sizeof(bpf_fd)))
error(1, errno, "failed to set SO_ATTACH_REUSEPORT_EBPF");
close(bpf_fd);
}
static void attach_cbpf(int fd, uint16_t mod)
{
struct sock_filter code[] = {
/* A = (uint32_t)skb[0] */
{ BPF_LD | BPF_W | BPF_ABS, 0, 0, 0 },
/* A = A % mod */
{ BPF_ALU | BPF_MOD, 0, 0, mod },
/* return A */
{ BPF_RET | BPF_A, 0, 0, 0 },
};
struct sock_fprog p = {
.len = ARRAY_SIZE(code),
.filter = code,
};
if (setsockopt(fd, SOL_SOCKET, SO_ATTACH_REUSEPORT_CBPF, &p, sizeof(p)))
error(1, errno, "failed to set SO_ATTACH_REUSEPORT_CBPF");
}
static void build_recv_group(const struct test_params p, int fd[], uint16_t mod,
void (*attach_bpf)(int, uint16_t))
{
struct sockaddr * const addr =
new_any_sockaddr(p.recv_family, p.recv_port);
int i, opt;
for (i = 0; i < p.recv_socks; ++i) {
fd[i] = socket(p.recv_family, p.protocol, 0);
if (fd[i] < 0)
error(1, errno, "failed to create recv %d", i);
opt = 1;
if (setsockopt(fd[i], SOL_SOCKET, SO_REUSEPORT, &opt,
sizeof(opt)))
error(1, errno, "failed to set SO_REUSEPORT on %d", i);
if (i == 0)
attach_bpf(fd[i], mod);
if (bind(fd[i], addr, sockaddr_size()))
error(1, errno, "failed to bind recv socket %d", i);
if (p.protocol == SOCK_STREAM) {
opt = 4;
if (setsockopt(fd[i], SOL_TCP, TCP_FASTOPEN, &opt,
sizeof(opt)))
error(1, errno,
"failed to set TCP_FASTOPEN on %d", i);
if (listen(fd[i], p.recv_socks * 10))
error(1, errno, "failed to listen on socket");
}
}
free(addr);
}
static void send_from(struct test_params p, uint16_t sport, char *buf,
size_t len)
{
struct sockaddr * const saddr = new_any_sockaddr(p.send_family, sport);
struct sockaddr * const daddr =
new_loopback_sockaddr(p.send_family, p.recv_port);
const int fd = socket(p.send_family, p.protocol, 0), one = 1;
if (fd < 0)
error(1, errno, "failed to create send socket");
if (setsockopt(fd, SOL_SOCKET, SO_REUSEADDR, &one, sizeof(one)))
error(1, errno, "failed to set reuseaddr");
if (bind(fd, saddr, sockaddr_size()))
error(1, errno, "failed to bind send socket");
if (sendto(fd, buf, len, MSG_FASTOPEN, daddr, sockaddr_size()) < 0)
error(1, errno, "failed to send message");
close(fd);
free(saddr);
free(daddr);
}
static void test_recv_order(const struct test_params p, int fd[], int mod)
{
char recv_buf[8], send_buf[8];
struct msghdr msg;
struct iovec recv_io = { recv_buf, 8 };
struct epoll_event ev;
int epfd, conn, i, sport, expected;
uint32_t data, ndata;
epfd = epoll_create(1);
if (epfd < 0)
error(1, errno, "failed to create epoll");
for (i = 0; i < p.recv_socks; ++i) {
ev.events = EPOLLIN;
ev.data.fd = fd[i];
if (epoll_ctl(epfd, EPOLL_CTL_ADD, fd[i], &ev))
error(1, errno, "failed to register sock %d epoll", i);
}
memset(&msg, 0, sizeof(msg));
msg.msg_iov = &recv_io;
msg.msg_iovlen = 1;
for (data = 0; data < p.recv_socks * 2; ++data) {
sport = p.send_port_min + data;
ndata = htonl(data);
memcpy(send_buf, &ndata, sizeof(ndata));
send_from(p, sport, send_buf, sizeof(ndata));
i = epoll_wait(epfd, &ev, 1, -1);
if (i < 0)
error(1, errno, "epoll wait failed");
if (p.protocol == SOCK_STREAM) {
conn = accept(ev.data.fd, NULL, NULL);
if (conn < 0)
error(1, errno, "error accepting");
i = recvmsg(conn, &msg, 0);
close(conn);
} else {
i = recvmsg(ev.data.fd, &msg, 0);
}
if (i < 0)
error(1, errno, "recvmsg error");
if (i != sizeof(ndata))
error(1, 0, "expected size %zd got %d",
sizeof(ndata), i);
for (i = 0; i < p.recv_socks; ++i)
if (ev.data.fd == fd[i])
break;
memcpy(&ndata, recv_buf, sizeof(ndata));
fprintf(stderr, "Socket %d: %d\n", i, ntohl(ndata));
expected = (sport % mod);
if (i != expected)
error(1, 0, "expected socket %d", expected);
}
}
static void test_reuseport_ebpf(struct test_params p)
{
int i, fd[p.recv_socks];
fprintf(stderr, "Testing EBPF mod %zd...\n", p.recv_socks);
build_recv_group(p, fd, p.recv_socks, attach_ebpf);
test_recv_order(p, fd, p.recv_socks);
p.send_port_min += p.recv_socks * 2;
fprintf(stderr, "Reprograming, testing mod %zd...\n", p.recv_socks / 2);
attach_ebpf(fd[0], p.recv_socks / 2);
test_recv_order(p, fd, p.recv_socks / 2);
for (i = 0; i < p.recv_socks; ++i)
close(fd[i]);
}
static void test_reuseport_cbpf(struct test_params p)
{
int i, fd[p.recv_socks];
fprintf(stderr, "Testing CBPF mod %zd...\n", p.recv_socks);
build_recv_group(p, fd, p.recv_socks, attach_cbpf);
test_recv_order(p, fd, p.recv_socks);
p.send_port_min += p.recv_socks * 2;
fprintf(stderr, "Reprograming, testing mod %zd...\n", p.recv_socks / 2);
attach_cbpf(fd[0], p.recv_socks / 2);
test_recv_order(p, fd, p.recv_socks / 2);
for (i = 0; i < p.recv_socks; ++i)
close(fd[i]);
}
static void test_extra_filter(const struct test_params p)
{
struct sockaddr * const addr =
new_any_sockaddr(p.recv_family, p.recv_port);
int fd1, fd2, opt;
fprintf(stderr, "Testing too many filters...\n");
fd1 = socket(p.recv_family, p.protocol, 0);
if (fd1 < 0)
error(1, errno, "failed to create socket 1");
fd2 = socket(p.recv_family, p.protocol, 0);
if (fd2 < 0)
error(1, errno, "failed to create socket 2");
opt = 1;
if (setsockopt(fd1, SOL_SOCKET, SO_REUSEPORT, &opt, sizeof(opt)))
error(1, errno, "failed to set SO_REUSEPORT on socket 1");
if (setsockopt(fd2, SOL_SOCKET, SO_REUSEPORT, &opt, sizeof(opt)))
error(1, errno, "failed to set SO_REUSEPORT on socket 2");
attach_ebpf(fd1, 10);
attach_ebpf(fd2, 10);
if (bind(fd1, addr, sockaddr_size()))
error(1, errno, "failed to bind recv socket 1");
if (!bind(fd2, addr, sockaddr_size()) || errno != EADDRINUSE)
error(1, errno, "bind socket 2 should fail with EADDRINUSE");
free(addr);
}
static void test_filter_no_reuseport(const struct test_params p)
{
struct sockaddr * const addr =
new_any_sockaddr(p.recv_family, p.recv_port);
const char bpf_license[] = "GPL";
struct bpf_insn ecode[] = {
{ BPF_ALU64 | BPF_MOV | BPF_K, BPF_REG_0, 0, 0, 10 },
{ BPF_JMP | BPF_EXIT, 0, 0, 0, 0 }
};
struct sock_filter ccode[] = {{ BPF_RET | BPF_A, 0, 0, 0 }};
union bpf_attr eprog;
struct sock_fprog cprog;
int fd, bpf_fd;
fprintf(stderr, "Testing filters on non-SO_REUSEPORT socket...\n");
memset(&eprog, 0, sizeof(eprog));
eprog.prog_type = BPF_PROG_TYPE_SOCKET_FILTER;
eprog.insn_cnt = ARRAY_SIZE(ecode);
eprog.insns = (unsigned long) &ecode;
eprog.license = (unsigned long) &bpf_license;
eprog.kern_version = 0;
memset(&cprog, 0, sizeof(cprog));
cprog.len = ARRAY_SIZE(ccode);
cprog.filter = ccode;
bpf_fd = syscall(__NR_bpf, BPF_PROG_LOAD, &eprog, sizeof(eprog));
if (bpf_fd < 0)
error(1, errno, "ebpf error");
fd = socket(p.recv_family, p.protocol, 0);
if (fd < 0)
error(1, errno, "failed to create socket 1");
if (bind(fd, addr, sockaddr_size()))
error(1, errno, "failed to bind recv socket 1");
errno = 0;
if (!setsockopt(fd, SOL_SOCKET, SO_ATTACH_REUSEPORT_EBPF, &bpf_fd,
sizeof(bpf_fd)) || errno != EINVAL)
error(1, errno, "setsockopt should have returned EINVAL");
errno = 0;
if (!setsockopt(fd, SOL_SOCKET, SO_ATTACH_REUSEPORT_CBPF, &cprog,
sizeof(cprog)) || errno != EINVAL)
error(1, errno, "setsockopt should have returned EINVAL");
free(addr);
}
static void test_filter_without_bind(void)
{
int fd1, fd2, opt = 1;
fprintf(stderr, "Testing filter add without bind...\n");
fd1 = socket(AF_INET, SOCK_DGRAM, 0);
if (fd1 < 0)
error(1, errno, "failed to create socket 1");
fd2 = socket(AF_INET, SOCK_DGRAM, 0);
if (fd2 < 0)
error(1, errno, "failed to create socket 2");
if (setsockopt(fd1, SOL_SOCKET, SO_REUSEPORT, &opt, sizeof(opt)))
error(1, errno, "failed to set SO_REUSEPORT on socket 1");
if (setsockopt(fd2, SOL_SOCKET, SO_REUSEPORT, &opt, sizeof(opt)))
error(1, errno, "failed to set SO_REUSEPORT on socket 2");
attach_ebpf(fd1, 10);
attach_cbpf(fd2, 10);
close(fd1);
close(fd2);
}
void enable_fastopen(void)
{
int fd = open("/proc/sys/net/ipv4/tcp_fastopen", 0);
int rw_mask = 3; /* bit 1: client side; bit-2 server side */
int val, size;
char buf[16];
if (fd < 0)
error(1, errno, "Unable to open tcp_fastopen sysctl");
if (read(fd, buf, sizeof(buf)) <= 0)
error(1, errno, "Unable to read tcp_fastopen sysctl");
val = atoi(buf);
close(fd);
if ((val & rw_mask) != rw_mask) {
fd = open("/proc/sys/net/ipv4/tcp_fastopen", O_RDWR);
if (fd < 0)
error(1, errno,
"Unable to open tcp_fastopen sysctl for writing");
val |= rw_mask;
size = snprintf(buf, 16, "%d", val);
if (write(fd, buf, size) <= 0)
error(1, errno, "Unable to write tcp_fastopen sysctl");
close(fd);
}
}
static struct rlimit rlim_old;
static __attribute__((constructor)) void main_ctor(void)
{
getrlimit(RLIMIT_MEMLOCK, &rlim_old);
if (rlim_old.rlim_cur != RLIM_INFINITY) {
struct rlimit rlim_new;
rlim_new.rlim_cur = rlim_old.rlim_cur + (1UL << 20);
rlim_new.rlim_max = rlim_old.rlim_max + (1UL << 20);
setrlimit(RLIMIT_MEMLOCK, &rlim_new);
}
}
static __attribute__((destructor)) void main_dtor(void)
{
setrlimit(RLIMIT_MEMLOCK, &rlim_old);
}
int main(void)
{
fprintf(stderr, "---- IPv4 UDP ----\n");
/* NOTE: UDP socket lookups traverse a different code path when there
* are > 10 sockets in a group. Run the bpf test through both paths.
*/
test_reuseport_ebpf((struct test_params) {
.recv_family = AF_INET,
.send_family = AF_INET,
.protocol = SOCK_DGRAM,
.recv_socks = 10,
.recv_port = 8000,
.send_port_min = 9000});
test_reuseport_ebpf((struct test_params) {
.recv_family = AF_INET,
.send_family = AF_INET,
.protocol = SOCK_DGRAM,
.recv_socks = 20,
.recv_port = 8000,
.send_port_min = 9000});
test_reuseport_cbpf((struct test_params) {
.recv_family = AF_INET,
.send_family = AF_INET,
.protocol = SOCK_DGRAM,
.recv_socks = 10,
.recv_port = 8001,
.send_port_min = 9020});
test_reuseport_cbpf((struct test_params) {
.recv_family = AF_INET,
.send_family = AF_INET,
.protocol = SOCK_DGRAM,
.recv_socks = 20,
.recv_port = 8001,
.send_port_min = 9020});
test_extra_filter((struct test_params) {
.recv_family = AF_INET,
.protocol = SOCK_DGRAM,
.recv_port = 8002});
test_filter_no_reuseport((struct test_params) {
.recv_family = AF_INET,
.protocol = SOCK_DGRAM,
.recv_port = 8008});
fprintf(stderr, "---- IPv6 UDP ----\n");
test_reuseport_ebpf((struct test_params) {
.recv_family = AF_INET6,
.send_family = AF_INET6,
.protocol = SOCK_DGRAM,
.recv_socks = 10,
.recv_port = 8003,
.send_port_min = 9040});
test_reuseport_ebpf((struct test_params) {
.recv_family = AF_INET6,
.send_family = AF_INET6,
.protocol = SOCK_DGRAM,
.recv_socks = 20,
.recv_port = 8003,
.send_port_min = 9040});
test_reuseport_cbpf((struct test_params) {
.recv_family = AF_INET6,
.send_family = AF_INET6,
.protocol = SOCK_DGRAM,
.recv_socks = 10,
.recv_port = 8004,
.send_port_min = 9060});
test_reuseport_cbpf((struct test_params) {
.recv_family = AF_INET6,
.send_family = AF_INET6,
.protocol = SOCK_DGRAM,
.recv_socks = 20,
.recv_port = 8004,
.send_port_min = 9060});
test_extra_filter((struct test_params) {
.recv_family = AF_INET6,
.protocol = SOCK_DGRAM,
.recv_port = 8005});
test_filter_no_reuseport((struct test_params) {
.recv_family = AF_INET6,
.protocol = SOCK_DGRAM,
.recv_port = 8009});
fprintf(stderr, "---- IPv6 UDP w/ mapped IPv4 ----\n");
test_reuseport_ebpf((struct test_params) {
.recv_family = AF_INET6,
.send_family = AF_INET,
.protocol = SOCK_DGRAM,
.recv_socks = 20,
.recv_port = 8006,
.send_port_min = 9080});
test_reuseport_ebpf((struct test_params) {
.recv_family = AF_INET6,
.send_family = AF_INET,
.protocol = SOCK_DGRAM,
.recv_socks = 10,
.recv_port = 8006,
.send_port_min = 9080});
test_reuseport_cbpf((struct test_params) {
.recv_family = AF_INET6,
.send_family = AF_INET,
.protocol = SOCK_DGRAM,
.recv_socks = 10,
.recv_port = 8007,
.send_port_min = 9100});
test_reuseport_cbpf((struct test_params) {
.recv_family = AF_INET6,
.send_family = AF_INET,
.protocol = SOCK_DGRAM,
.recv_socks = 20,
.recv_port = 8007,
.send_port_min = 9100});
/* TCP fastopen is required for the TCP tests */
enable_fastopen();
fprintf(stderr, "---- IPv4 TCP ----\n");
test_reuseport_ebpf((struct test_params) {
.recv_family = AF_INET,
.send_family = AF_INET,
.protocol = SOCK_STREAM,
.recv_socks = 10,
.recv_port = 8008,
.send_port_min = 9120});
test_reuseport_cbpf((struct test_params) {
.recv_family = AF_INET,
.send_family = AF_INET,
.protocol = SOCK_STREAM,
.recv_socks = 10,
.recv_port = 8009,
.send_port_min = 9160});
test_extra_filter((struct test_params) {
.recv_family = AF_INET,
.protocol = SOCK_STREAM,
.recv_port = 8010});
test_filter_no_reuseport((struct test_params) {
.recv_family = AF_INET,
.protocol = SOCK_STREAM,
.recv_port = 8011});
fprintf(stderr, "---- IPv6 TCP ----\n");
test_reuseport_ebpf((struct test_params) {
.recv_family = AF_INET6,
.send_family = AF_INET6,
.protocol = SOCK_STREAM,
.recv_socks = 10,
.recv_port = 8012,
.send_port_min = 9200});
test_reuseport_cbpf((struct test_params) {
.recv_family = AF_INET6,
.send_family = AF_INET6,
.protocol = SOCK_STREAM,
.recv_socks = 10,
.recv_port = 8013,
.send_port_min = 9240});
test_extra_filter((struct test_params) {
.recv_family = AF_INET6,
.protocol = SOCK_STREAM,
.recv_port = 8014});
test_filter_no_reuseport((struct test_params) {
.recv_family = AF_INET6,
.protocol = SOCK_STREAM,
.recv_port = 8015});
fprintf(stderr, "---- IPv6 TCP w/ mapped IPv4 ----\n");
test_reuseport_ebpf((struct test_params) {
.recv_family = AF_INET6,
.send_family = AF_INET,
.protocol = SOCK_STREAM,
.recv_socks = 10,
.recv_port = 8016,
.send_port_min = 9320});
test_reuseport_cbpf((struct test_params) {
.recv_family = AF_INET6,
.send_family = AF_INET,
.protocol = SOCK_STREAM,
.recv_socks = 10,
.recv_port = 8017,
.send_port_min = 9360});
test_filter_without_bind();
fprintf(stderr, "SUCCESS\n");
return 0;
}
| linux-master | tools/testing/selftests/net/reuseport_bpf.c |
// SPDX-License-Identifier: GPL-2.0
/*
* This testsuite provides conformance testing for GRO coalescing.
*
* Test cases:
* 1.data
* Data packets of the same size and same header setup with correct
* sequence numbers coalesce. The one exception being the last data
* packet coalesced: it can be smaller than the rest and coalesced
* as long as it is in the same flow.
* 2.ack
* Pure ACK does not coalesce.
* 3.flags
* Specific test cases: no packets with PSH, SYN, URG, RST set will
* be coalesced.
* 4.tcp
* Packets with incorrect checksum, non-consecutive seqno and
* different TCP header options shouldn't coalesce. Nit: given that
* some extension headers have paddings, such as timestamp, headers
* that are padding differently would not be coalesced.
* 5.ip:
* Packets with different (ECN, TTL, TOS) header, ip options or
* ip fragments (ipv6) shouldn't coalesce.
* 6.large:
* Packets larger than GRO_MAX_SIZE packets shouldn't coalesce.
*
* MSS is defined as 4096 - header because if it is too small
* (i.e. 1500 MTU - header), it will result in many packets,
* increasing the "large" test case's flakiness. This is because
* due to time sensitivity in the coalescing window, the receiver
* may not coalesce all of the packets.
*
* Note the timing issue applies to all of the test cases, so some
* flakiness is to be expected.
*
*/
#define _GNU_SOURCE
#include <arpa/inet.h>
#include <errno.h>
#include <error.h>
#include <getopt.h>
#include <linux/filter.h>
#include <linux/if_packet.h>
#include <linux/ipv6.h>
#include <net/ethernet.h>
#include <net/if.h>
#include <netinet/in.h>
#include <netinet/ip.h>
#include <netinet/ip6.h>
#include <netinet/tcp.h>
#include <stdbool.h>
#include <stddef.h>
#include <stdio.h>
#include <stdarg.h>
#include <string.h>
#include <unistd.h>
#include "../kselftest.h"
#define DPORT 8000
#define SPORT 1500
#define PAYLOAD_LEN 100
#define NUM_PACKETS 4
#define START_SEQ 100
#define START_ACK 100
#define ETH_P_NONE 0
#define TOTAL_HDR_LEN (ETH_HLEN + sizeof(struct ipv6hdr) + sizeof(struct tcphdr))
#define MSS (4096 - sizeof(struct tcphdr) - sizeof(struct ipv6hdr))
#define MAX_PAYLOAD (IP_MAXPACKET - sizeof(struct tcphdr) - sizeof(struct ipv6hdr))
#define NUM_LARGE_PKT (MAX_PAYLOAD / MSS)
#define MAX_HDR_LEN (ETH_HLEN + sizeof(struct ipv6hdr) + sizeof(struct tcphdr))
static const char *addr6_src = "fdaa::2";
static const char *addr6_dst = "fdaa::1";
static const char *addr4_src = "192.168.1.200";
static const char *addr4_dst = "192.168.1.100";
static int proto = -1;
static uint8_t src_mac[ETH_ALEN], dst_mac[ETH_ALEN];
static char *testname = "data";
static char *ifname = "eth0";
static char *smac = "aa:00:00:00:00:02";
static char *dmac = "aa:00:00:00:00:01";
static bool verbose;
static bool tx_socket = true;
static int tcp_offset = -1;
static int total_hdr_len = -1;
static int ethhdr_proto = -1;
static void vlog(const char *fmt, ...)
{
va_list args;
if (verbose) {
va_start(args, fmt);
vfprintf(stderr, fmt, args);
va_end(args);
}
}
static void setup_sock_filter(int fd)
{
const int dport_off = tcp_offset + offsetof(struct tcphdr, dest);
const int ethproto_off = offsetof(struct ethhdr, h_proto);
int optlen = 0;
int ipproto_off;
int next_off;
if (proto == PF_INET)
next_off = offsetof(struct iphdr, protocol);
else
next_off = offsetof(struct ipv6hdr, nexthdr);
ipproto_off = ETH_HLEN + next_off;
if (strcmp(testname, "ip") == 0) {
if (proto == PF_INET)
optlen = sizeof(struct ip_timestamp);
else
optlen = sizeof(struct ip6_frag);
}
struct sock_filter filter[] = {
BPF_STMT(BPF_LD + BPF_H + BPF_ABS, ethproto_off),
BPF_JUMP(BPF_JMP + BPF_JEQ + BPF_K, ntohs(ethhdr_proto), 0, 7),
BPF_STMT(BPF_LD + BPF_B + BPF_ABS, ipproto_off),
BPF_JUMP(BPF_JMP + BPF_JEQ + BPF_K, IPPROTO_TCP, 0, 5),
BPF_STMT(BPF_LD + BPF_H + BPF_ABS, dport_off),
BPF_JUMP(BPF_JMP + BPF_JEQ + BPF_K, DPORT, 2, 0),
BPF_STMT(BPF_LD + BPF_H + BPF_ABS, dport_off + optlen),
BPF_JUMP(BPF_JMP + BPF_JEQ + BPF_K, DPORT, 0, 1),
BPF_STMT(BPF_RET + BPF_K, 0xFFFFFFFF),
BPF_STMT(BPF_RET + BPF_K, 0),
};
struct sock_fprog bpf = {
.len = ARRAY_SIZE(filter),
.filter = filter,
};
if (setsockopt(fd, SOL_SOCKET, SO_ATTACH_FILTER, &bpf, sizeof(bpf)) < 0)
error(1, errno, "error setting filter");
}
static uint32_t checksum_nofold(void *data, size_t len, uint32_t sum)
{
uint16_t *words = data;
int i;
for (i = 0; i < len / 2; i++)
sum += words[i];
if (len & 1)
sum += ((char *)data)[len - 1];
return sum;
}
static uint16_t checksum_fold(void *data, size_t len, uint32_t sum)
{
sum = checksum_nofold(data, len, sum);
while (sum > 0xFFFF)
sum = (sum & 0xFFFF) + (sum >> 16);
return ~sum;
}
static uint16_t tcp_checksum(void *buf, int payload_len)
{
struct pseudo_header6 {
struct in6_addr saddr;
struct in6_addr daddr;
uint16_t protocol;
uint16_t payload_len;
} ph6;
struct pseudo_header4 {
struct in_addr saddr;
struct in_addr daddr;
uint16_t protocol;
uint16_t payload_len;
} ph4;
uint32_t sum = 0;
if (proto == PF_INET6) {
if (inet_pton(AF_INET6, addr6_src, &ph6.saddr) != 1)
error(1, errno, "inet_pton6 source ip pseudo");
if (inet_pton(AF_INET6, addr6_dst, &ph6.daddr) != 1)
error(1, errno, "inet_pton6 dest ip pseudo");
ph6.protocol = htons(IPPROTO_TCP);
ph6.payload_len = htons(sizeof(struct tcphdr) + payload_len);
sum = checksum_nofold(&ph6, sizeof(ph6), 0);
} else if (proto == PF_INET) {
if (inet_pton(AF_INET, addr4_src, &ph4.saddr) != 1)
error(1, errno, "inet_pton source ip pseudo");
if (inet_pton(AF_INET, addr4_dst, &ph4.daddr) != 1)
error(1, errno, "inet_pton dest ip pseudo");
ph4.protocol = htons(IPPROTO_TCP);
ph4.payload_len = htons(sizeof(struct tcphdr) + payload_len);
sum = checksum_nofold(&ph4, sizeof(ph4), 0);
}
return checksum_fold(buf, sizeof(struct tcphdr) + payload_len, sum);
}
static void read_MAC(uint8_t *mac_addr, char *mac)
{
if (sscanf(mac, "%hhx:%hhx:%hhx:%hhx:%hhx:%hhx",
&mac_addr[0], &mac_addr[1], &mac_addr[2],
&mac_addr[3], &mac_addr[4], &mac_addr[5]) != 6)
error(1, 0, "sscanf");
}
static void fill_datalinklayer(void *buf)
{
struct ethhdr *eth = buf;
memcpy(eth->h_dest, dst_mac, ETH_ALEN);
memcpy(eth->h_source, src_mac, ETH_ALEN);
eth->h_proto = ethhdr_proto;
}
static void fill_networklayer(void *buf, int payload_len)
{
struct ipv6hdr *ip6h = buf;
struct iphdr *iph = buf;
if (proto == PF_INET6) {
memset(ip6h, 0, sizeof(*ip6h));
ip6h->version = 6;
ip6h->payload_len = htons(sizeof(struct tcphdr) + payload_len);
ip6h->nexthdr = IPPROTO_TCP;
ip6h->hop_limit = 8;
if (inet_pton(AF_INET6, addr6_src, &ip6h->saddr) != 1)
error(1, errno, "inet_pton source ip6");
if (inet_pton(AF_INET6, addr6_dst, &ip6h->daddr) != 1)
error(1, errno, "inet_pton dest ip6");
} else if (proto == PF_INET) {
memset(iph, 0, sizeof(*iph));
iph->version = 4;
iph->ihl = 5;
iph->ttl = 8;
iph->protocol = IPPROTO_TCP;
iph->tot_len = htons(sizeof(struct tcphdr) +
payload_len + sizeof(struct iphdr));
iph->frag_off = htons(0x4000); /* DF = 1, MF = 0 */
if (inet_pton(AF_INET, addr4_src, &iph->saddr) != 1)
error(1, errno, "inet_pton source ip");
if (inet_pton(AF_INET, addr4_dst, &iph->daddr) != 1)
error(1, errno, "inet_pton dest ip");
iph->check = checksum_fold(buf, sizeof(struct iphdr), 0);
}
}
static void fill_transportlayer(void *buf, int seq_offset, int ack_offset,
int payload_len, int fin)
{
struct tcphdr *tcph = buf;
memset(tcph, 0, sizeof(*tcph));
tcph->source = htons(SPORT);
tcph->dest = htons(DPORT);
tcph->seq = ntohl(START_SEQ + seq_offset);
tcph->ack_seq = ntohl(START_ACK + ack_offset);
tcph->ack = 1;
tcph->fin = fin;
tcph->doff = 5;
tcph->window = htons(TCP_MAXWIN);
tcph->urg_ptr = 0;
tcph->check = tcp_checksum(tcph, payload_len);
}
static void write_packet(int fd, char *buf, int len, struct sockaddr_ll *daddr)
{
int ret = -1;
ret = sendto(fd, buf, len, 0, (struct sockaddr *)daddr, sizeof(*daddr));
if (ret == -1)
error(1, errno, "sendto failure");
if (ret != len)
error(1, errno, "sendto wrong length");
}
static void create_packet(void *buf, int seq_offset, int ack_offset,
int payload_len, int fin)
{
memset(buf, 0, total_hdr_len);
memset(buf + total_hdr_len, 'a', payload_len);
fill_transportlayer(buf + tcp_offset, seq_offset, ack_offset,
payload_len, fin);
fill_networklayer(buf + ETH_HLEN, payload_len);
fill_datalinklayer(buf);
}
/* send one extra flag, not first and not last pkt */
static void send_flags(int fd, struct sockaddr_ll *daddr, int psh, int syn,
int rst, int urg)
{
static char flag_buf[MAX_HDR_LEN + PAYLOAD_LEN];
static char buf[MAX_HDR_LEN + PAYLOAD_LEN];
int payload_len, pkt_size, flag, i;
struct tcphdr *tcph;
payload_len = PAYLOAD_LEN * psh;
pkt_size = total_hdr_len + payload_len;
flag = NUM_PACKETS / 2;
create_packet(flag_buf, flag * payload_len, 0, payload_len, 0);
tcph = (struct tcphdr *)(flag_buf + tcp_offset);
tcph->psh = psh;
tcph->syn = syn;
tcph->rst = rst;
tcph->urg = urg;
tcph->check = 0;
tcph->check = tcp_checksum(tcph, payload_len);
for (i = 0; i < NUM_PACKETS + 1; i++) {
if (i == flag) {
write_packet(fd, flag_buf, pkt_size, daddr);
continue;
}
create_packet(buf, i * PAYLOAD_LEN, 0, PAYLOAD_LEN, 0);
write_packet(fd, buf, total_hdr_len + PAYLOAD_LEN, daddr);
}
}
/* Test for data of same length, smaller than previous
* and of different lengths
*/
static void send_data_pkts(int fd, struct sockaddr_ll *daddr,
int payload_len1, int payload_len2)
{
static char buf[ETH_HLEN + IP_MAXPACKET];
create_packet(buf, 0, 0, payload_len1, 0);
write_packet(fd, buf, total_hdr_len + payload_len1, daddr);
create_packet(buf, payload_len1, 0, payload_len2, 0);
write_packet(fd, buf, total_hdr_len + payload_len2, daddr);
}
/* If incoming segments make tracked segment length exceed
* legal IP datagram length, do not coalesce
*/
static void send_large(int fd, struct sockaddr_ll *daddr, int remainder)
{
static char pkts[NUM_LARGE_PKT][TOTAL_HDR_LEN + MSS];
static char last[TOTAL_HDR_LEN + MSS];
static char new_seg[TOTAL_HDR_LEN + MSS];
int i;
for (i = 0; i < NUM_LARGE_PKT; i++)
create_packet(pkts[i], i * MSS, 0, MSS, 0);
create_packet(last, NUM_LARGE_PKT * MSS, 0, remainder, 0);
create_packet(new_seg, (NUM_LARGE_PKT + 1) * MSS, 0, remainder, 0);
for (i = 0; i < NUM_LARGE_PKT; i++)
write_packet(fd, pkts[i], total_hdr_len + MSS, daddr);
write_packet(fd, last, total_hdr_len + remainder, daddr);
write_packet(fd, new_seg, total_hdr_len + remainder, daddr);
}
/* Pure acks and dup acks don't coalesce */
static void send_ack(int fd, struct sockaddr_ll *daddr)
{
static char buf[MAX_HDR_LEN];
create_packet(buf, 0, 0, 0, 0);
write_packet(fd, buf, total_hdr_len, daddr);
write_packet(fd, buf, total_hdr_len, daddr);
create_packet(buf, 0, 1, 0, 0);
write_packet(fd, buf, total_hdr_len, daddr);
}
static void recompute_packet(char *buf, char *no_ext, int extlen)
{
struct tcphdr *tcphdr = (struct tcphdr *)(buf + tcp_offset);
struct ipv6hdr *ip6h = (struct ipv6hdr *)(buf + ETH_HLEN);
struct iphdr *iph = (struct iphdr *)(buf + ETH_HLEN);
memmove(buf, no_ext, total_hdr_len);
memmove(buf + total_hdr_len + extlen,
no_ext + total_hdr_len, PAYLOAD_LEN);
tcphdr->doff = tcphdr->doff + (extlen / 4);
tcphdr->check = 0;
tcphdr->check = tcp_checksum(tcphdr, PAYLOAD_LEN + extlen);
if (proto == PF_INET) {
iph->tot_len = htons(ntohs(iph->tot_len) + extlen);
iph->check = 0;
iph->check = checksum_fold(iph, sizeof(struct iphdr), 0);
} else {
ip6h->payload_len = htons(ntohs(ip6h->payload_len) + extlen);
}
}
static void tcp_write_options(char *buf, int kind, int ts)
{
struct tcp_option_ts {
uint8_t kind;
uint8_t len;
uint32_t tsval;
uint32_t tsecr;
} *opt_ts = (void *)buf;
struct tcp_option_window {
uint8_t kind;
uint8_t len;
uint8_t shift;
} *opt_window = (void *)buf;
switch (kind) {
case TCPOPT_NOP:
buf[0] = TCPOPT_NOP;
break;
case TCPOPT_WINDOW:
memset(opt_window, 0, sizeof(struct tcp_option_window));
opt_window->kind = TCPOPT_WINDOW;
opt_window->len = TCPOLEN_WINDOW;
opt_window->shift = 0;
break;
case TCPOPT_TIMESTAMP:
memset(opt_ts, 0, sizeof(struct tcp_option_ts));
opt_ts->kind = TCPOPT_TIMESTAMP;
opt_ts->len = TCPOLEN_TIMESTAMP;
opt_ts->tsval = ts;
opt_ts->tsecr = 0;
break;
default:
error(1, 0, "unimplemented TCP option");
break;
}
}
/* TCP with options is always a permutation of {TS, NOP, NOP}.
* Implement different orders to verify coalescing stops.
*/
static void add_standard_tcp_options(char *buf, char *no_ext, int ts, int order)
{
switch (order) {
case 0:
tcp_write_options(buf + total_hdr_len, TCPOPT_NOP, 0);
tcp_write_options(buf + total_hdr_len + 1, TCPOPT_NOP, 0);
tcp_write_options(buf + total_hdr_len + 2 /* two NOP opts */,
TCPOPT_TIMESTAMP, ts);
break;
case 1:
tcp_write_options(buf + total_hdr_len, TCPOPT_NOP, 0);
tcp_write_options(buf + total_hdr_len + 1,
TCPOPT_TIMESTAMP, ts);
tcp_write_options(buf + total_hdr_len + 1 + TCPOLEN_TIMESTAMP,
TCPOPT_NOP, 0);
break;
case 2:
tcp_write_options(buf + total_hdr_len, TCPOPT_TIMESTAMP, ts);
tcp_write_options(buf + total_hdr_len + TCPOLEN_TIMESTAMP + 1,
TCPOPT_NOP, 0);
tcp_write_options(buf + total_hdr_len + TCPOLEN_TIMESTAMP + 2,
TCPOPT_NOP, 0);
break;
default:
error(1, 0, "unknown order");
break;
}
recompute_packet(buf, no_ext, TCPOLEN_TSTAMP_APPA);
}
/* Packets with invalid checksum don't coalesce. */
static void send_changed_checksum(int fd, struct sockaddr_ll *daddr)
{
static char buf[MAX_HDR_LEN + PAYLOAD_LEN];
struct tcphdr *tcph = (struct tcphdr *)(buf + tcp_offset);
int pkt_size = total_hdr_len + PAYLOAD_LEN;
create_packet(buf, 0, 0, PAYLOAD_LEN, 0);
write_packet(fd, buf, pkt_size, daddr);
create_packet(buf, PAYLOAD_LEN, 0, PAYLOAD_LEN, 0);
tcph->check = tcph->check - 1;
write_packet(fd, buf, pkt_size, daddr);
}
/* Packets with non-consecutive sequence number don't coalesce.*/
static void send_changed_seq(int fd, struct sockaddr_ll *daddr)
{
static char buf[MAX_HDR_LEN + PAYLOAD_LEN];
struct tcphdr *tcph = (struct tcphdr *)(buf + tcp_offset);
int pkt_size = total_hdr_len + PAYLOAD_LEN;
create_packet(buf, 0, 0, PAYLOAD_LEN, 0);
write_packet(fd, buf, pkt_size, daddr);
create_packet(buf, PAYLOAD_LEN, 0, PAYLOAD_LEN, 0);
tcph->seq = ntohl(htonl(tcph->seq) + 1);
tcph->check = 0;
tcph->check = tcp_checksum(tcph, PAYLOAD_LEN);
write_packet(fd, buf, pkt_size, daddr);
}
/* Packet with different timestamp option or different timestamps
* don't coalesce.
*/
static void send_changed_ts(int fd, struct sockaddr_ll *daddr)
{
static char buf[MAX_HDR_LEN + PAYLOAD_LEN];
static char extpkt[sizeof(buf) + TCPOLEN_TSTAMP_APPA];
int pkt_size = total_hdr_len + PAYLOAD_LEN + TCPOLEN_TSTAMP_APPA;
create_packet(buf, 0, 0, PAYLOAD_LEN, 0);
add_standard_tcp_options(extpkt, buf, 0, 0);
write_packet(fd, extpkt, pkt_size, daddr);
create_packet(buf, PAYLOAD_LEN, 0, PAYLOAD_LEN, 0);
add_standard_tcp_options(extpkt, buf, 0, 0);
write_packet(fd, extpkt, pkt_size, daddr);
create_packet(buf, PAYLOAD_LEN * 2, 0, PAYLOAD_LEN, 0);
add_standard_tcp_options(extpkt, buf, 100, 0);
write_packet(fd, extpkt, pkt_size, daddr);
create_packet(buf, PAYLOAD_LEN * 3, 0, PAYLOAD_LEN, 0);
add_standard_tcp_options(extpkt, buf, 100, 1);
write_packet(fd, extpkt, pkt_size, daddr);
create_packet(buf, PAYLOAD_LEN * 4, 0, PAYLOAD_LEN, 0);
add_standard_tcp_options(extpkt, buf, 100, 2);
write_packet(fd, extpkt, pkt_size, daddr);
}
/* Packet with different tcp options don't coalesce. */
static void send_diff_opt(int fd, struct sockaddr_ll *daddr)
{
static char buf[MAX_HDR_LEN + PAYLOAD_LEN];
static char extpkt1[sizeof(buf) + TCPOLEN_TSTAMP_APPA];
static char extpkt2[sizeof(buf) + TCPOLEN_MAXSEG];
int extpkt1_size = total_hdr_len + PAYLOAD_LEN + TCPOLEN_TSTAMP_APPA;
int extpkt2_size = total_hdr_len + PAYLOAD_LEN + TCPOLEN_MAXSEG;
create_packet(buf, 0, 0, PAYLOAD_LEN, 0);
add_standard_tcp_options(extpkt1, buf, 0, 0);
write_packet(fd, extpkt1, extpkt1_size, daddr);
create_packet(buf, PAYLOAD_LEN, 0, PAYLOAD_LEN, 0);
add_standard_tcp_options(extpkt1, buf, 0, 0);
write_packet(fd, extpkt1, extpkt1_size, daddr);
create_packet(buf, PAYLOAD_LEN * 2, 0, PAYLOAD_LEN, 0);
tcp_write_options(extpkt2 + MAX_HDR_LEN, TCPOPT_NOP, 0);
tcp_write_options(extpkt2 + MAX_HDR_LEN + 1, TCPOPT_WINDOW, 0);
recompute_packet(extpkt2, buf, TCPOLEN_WINDOW + 1);
write_packet(fd, extpkt2, extpkt2_size, daddr);
}
static void add_ipv4_ts_option(void *buf, void *optpkt)
{
struct ip_timestamp *ts = (struct ip_timestamp *)(optpkt + tcp_offset);
int optlen = sizeof(struct ip_timestamp);
struct iphdr *iph;
if (optlen % 4)
error(1, 0, "ipv4 timestamp length is not a multiple of 4B");
ts->ipt_code = IPOPT_TS;
ts->ipt_len = optlen;
ts->ipt_ptr = 5;
ts->ipt_flg = IPOPT_TS_TSONLY;
memcpy(optpkt, buf, tcp_offset);
memcpy(optpkt + tcp_offset + optlen, buf + tcp_offset,
sizeof(struct tcphdr) + PAYLOAD_LEN);
iph = (struct iphdr *)(optpkt + ETH_HLEN);
iph->ihl = 5 + (optlen / 4);
iph->tot_len = htons(ntohs(iph->tot_len) + optlen);
iph->check = 0;
iph->check = checksum_fold(iph, sizeof(struct iphdr) + optlen, 0);
}
/* IPv4 options shouldn't coalesce */
static void send_ip_options(int fd, struct sockaddr_ll *daddr)
{
static char buf[MAX_HDR_LEN + PAYLOAD_LEN];
static char optpkt[sizeof(buf) + sizeof(struct ip_timestamp)];
int optlen = sizeof(struct ip_timestamp);
int pkt_size = total_hdr_len + PAYLOAD_LEN + optlen;
create_packet(buf, 0, 0, PAYLOAD_LEN, 0);
write_packet(fd, buf, total_hdr_len + PAYLOAD_LEN, daddr);
create_packet(buf, PAYLOAD_LEN * 1, 0, PAYLOAD_LEN, 0);
add_ipv4_ts_option(buf, optpkt);
write_packet(fd, optpkt, pkt_size, daddr);
create_packet(buf, PAYLOAD_LEN * 2, 0, PAYLOAD_LEN, 0);
write_packet(fd, buf, total_hdr_len + PAYLOAD_LEN, daddr);
}
/* IPv4 fragments shouldn't coalesce */
static void send_fragment4(int fd, struct sockaddr_ll *daddr)
{
static char buf[IP_MAXPACKET];
struct iphdr *iph = (struct iphdr *)(buf + ETH_HLEN);
int pkt_size = total_hdr_len + PAYLOAD_LEN;
create_packet(buf, 0, 0, PAYLOAD_LEN, 0);
write_packet(fd, buf, pkt_size, daddr);
/* Once fragmented, packet would retain the total_len.
* Tcp header is prepared as if rest of data is in follow-up frags,
* but follow up frags aren't actually sent.
*/
memset(buf + total_hdr_len, 'a', PAYLOAD_LEN * 2);
fill_transportlayer(buf + tcp_offset, PAYLOAD_LEN, 0, PAYLOAD_LEN * 2, 0);
fill_networklayer(buf + ETH_HLEN, PAYLOAD_LEN);
fill_datalinklayer(buf);
iph->frag_off = htons(0x6000); // DF = 1, MF = 1
iph->check = 0;
iph->check = checksum_fold(iph, sizeof(struct iphdr), 0);
write_packet(fd, buf, pkt_size, daddr);
}
/* IPv4 packets with different ttl don't coalesce.*/
static void send_changed_ttl(int fd, struct sockaddr_ll *daddr)
{
int pkt_size = total_hdr_len + PAYLOAD_LEN;
static char buf[MAX_HDR_LEN + PAYLOAD_LEN];
struct iphdr *iph = (struct iphdr *)(buf + ETH_HLEN);
create_packet(buf, 0, 0, PAYLOAD_LEN, 0);
write_packet(fd, buf, pkt_size, daddr);
create_packet(buf, PAYLOAD_LEN, 0, PAYLOAD_LEN, 0);
iph->ttl = 7;
iph->check = 0;
iph->check = checksum_fold(iph, sizeof(struct iphdr), 0);
write_packet(fd, buf, pkt_size, daddr);
}
/* Packets with different tos don't coalesce.*/
static void send_changed_tos(int fd, struct sockaddr_ll *daddr)
{
int pkt_size = total_hdr_len + PAYLOAD_LEN;
static char buf[MAX_HDR_LEN + PAYLOAD_LEN];
struct iphdr *iph = (struct iphdr *)(buf + ETH_HLEN);
struct ipv6hdr *ip6h = (struct ipv6hdr *)(buf + ETH_HLEN);
create_packet(buf, 0, 0, PAYLOAD_LEN, 0);
write_packet(fd, buf, pkt_size, daddr);
create_packet(buf, PAYLOAD_LEN, 0, PAYLOAD_LEN, 0);
if (proto == PF_INET) {
iph->tos = 1;
iph->check = 0;
iph->check = checksum_fold(iph, sizeof(struct iphdr), 0);
} else if (proto == PF_INET6) {
ip6h->priority = 0xf;
}
write_packet(fd, buf, pkt_size, daddr);
}
/* Packets with different ECN don't coalesce.*/
static void send_changed_ECN(int fd, struct sockaddr_ll *daddr)
{
int pkt_size = total_hdr_len + PAYLOAD_LEN;
static char buf[MAX_HDR_LEN + PAYLOAD_LEN];
struct iphdr *iph = (struct iphdr *)(buf + ETH_HLEN);
create_packet(buf, 0, 0, PAYLOAD_LEN, 0);
write_packet(fd, buf, pkt_size, daddr);
create_packet(buf, PAYLOAD_LEN, 0, PAYLOAD_LEN, 0);
if (proto == PF_INET) {
buf[ETH_HLEN + 1] ^= 0x2; // ECN set to 10
iph->check = 0;
iph->check = checksum_fold(iph, sizeof(struct iphdr), 0);
} else {
buf[ETH_HLEN + 1] ^= 0x20; // ECN set to 10
}
write_packet(fd, buf, pkt_size, daddr);
}
/* IPv6 fragments and packets with extensions don't coalesce.*/
static void send_fragment6(int fd, struct sockaddr_ll *daddr)
{
static char buf[MAX_HDR_LEN + PAYLOAD_LEN];
static char extpkt[MAX_HDR_LEN + PAYLOAD_LEN +
sizeof(struct ip6_frag)];
struct ipv6hdr *ip6h = (struct ipv6hdr *)(buf + ETH_HLEN);
struct ip6_frag *frag = (void *)(extpkt + tcp_offset);
int extlen = sizeof(struct ip6_frag);
int bufpkt_len = total_hdr_len + PAYLOAD_LEN;
int extpkt_len = bufpkt_len + extlen;
int i;
for (i = 0; i < 2; i++) {
create_packet(buf, PAYLOAD_LEN * i, 0, PAYLOAD_LEN, 0);
write_packet(fd, buf, bufpkt_len, daddr);
}
create_packet(buf, PAYLOAD_LEN * 2, 0, PAYLOAD_LEN, 0);
memset(extpkt, 0, extpkt_len);
ip6h->nexthdr = IPPROTO_FRAGMENT;
ip6h->payload_len = htons(ntohs(ip6h->payload_len) + extlen);
frag->ip6f_nxt = IPPROTO_TCP;
memcpy(extpkt, buf, tcp_offset);
memcpy(extpkt + tcp_offset + extlen, buf + tcp_offset,
sizeof(struct tcphdr) + PAYLOAD_LEN);
write_packet(fd, extpkt, extpkt_len, daddr);
create_packet(buf, PAYLOAD_LEN * 3, 0, PAYLOAD_LEN, 0);
write_packet(fd, buf, bufpkt_len, daddr);
}
static void bind_packetsocket(int fd)
{
struct sockaddr_ll daddr = {};
daddr.sll_family = AF_PACKET;
daddr.sll_protocol = ethhdr_proto;
daddr.sll_ifindex = if_nametoindex(ifname);
if (daddr.sll_ifindex == 0)
error(1, errno, "if_nametoindex");
if (bind(fd, (void *)&daddr, sizeof(daddr)) < 0)
error(1, errno, "could not bind socket");
}
static void set_timeout(int fd)
{
struct timeval timeout;
timeout.tv_sec = 3;
timeout.tv_usec = 0;
if (setsockopt(fd, SOL_SOCKET, SO_RCVTIMEO, (char *)&timeout,
sizeof(timeout)) < 0)
error(1, errno, "cannot set timeout, setsockopt failed");
}
static void check_recv_pkts(int fd, int *correct_payload,
int correct_num_pkts)
{
static char buffer[IP_MAXPACKET + ETH_HLEN + 1];
struct iphdr *iph = (struct iphdr *)(buffer + ETH_HLEN);
struct ipv6hdr *ip6h = (struct ipv6hdr *)(buffer + ETH_HLEN);
struct tcphdr *tcph;
bool bad_packet = false;
int tcp_ext_len = 0;
int ip_ext_len = 0;
int pkt_size = -1;
int data_len = 0;
int num_pkt = 0;
int i;
vlog("Expected {");
for (i = 0; i < correct_num_pkts; i++)
vlog("%d ", correct_payload[i]);
vlog("}, Total %d packets\nReceived {", correct_num_pkts);
while (1) {
pkt_size = recv(fd, buffer, IP_MAXPACKET + ETH_HLEN + 1, 0);
if (pkt_size < 0)
error(1, errno, "could not receive");
if (iph->version == 4)
ip_ext_len = (iph->ihl - 5) * 4;
else if (ip6h->version == 6 && ip6h->nexthdr != IPPROTO_TCP)
ip_ext_len = sizeof(struct ip6_frag);
tcph = (struct tcphdr *)(buffer + tcp_offset + ip_ext_len);
if (tcph->fin)
break;
tcp_ext_len = (tcph->doff - 5) * 4;
data_len = pkt_size - total_hdr_len - tcp_ext_len - ip_ext_len;
/* Min ethernet frame payload is 46(ETH_ZLEN - ETH_HLEN) by RFC 802.3.
* Ipv4/tcp packets without at least 6 bytes of data will be padded.
* Packet sockets are protocol agnostic, and will not trim the padding.
*/
if (pkt_size == ETH_ZLEN && iph->version == 4) {
data_len = ntohs(iph->tot_len)
- sizeof(struct tcphdr) - sizeof(struct iphdr);
}
vlog("%d ", data_len);
if (data_len != correct_payload[num_pkt]) {
vlog("[!=%d]", correct_payload[num_pkt]);
bad_packet = true;
}
num_pkt++;
}
vlog("}, Total %d packets.\n", num_pkt);
if (num_pkt != correct_num_pkts)
error(1, 0, "incorrect number of packets");
if (bad_packet)
error(1, 0, "incorrect packet geometry");
printf("Test succeeded\n\n");
}
static void gro_sender(void)
{
static char fin_pkt[MAX_HDR_LEN];
struct sockaddr_ll daddr = {};
int txfd = -1;
txfd = socket(PF_PACKET, SOCK_RAW, IPPROTO_RAW);
if (txfd < 0)
error(1, errno, "socket creation");
memset(&daddr, 0, sizeof(daddr));
daddr.sll_ifindex = if_nametoindex(ifname);
if (daddr.sll_ifindex == 0)
error(1, errno, "if_nametoindex");
daddr.sll_family = AF_PACKET;
memcpy(daddr.sll_addr, dst_mac, ETH_ALEN);
daddr.sll_halen = ETH_ALEN;
create_packet(fin_pkt, PAYLOAD_LEN * 2, 0, 0, 1);
if (strcmp(testname, "data") == 0) {
send_data_pkts(txfd, &daddr, PAYLOAD_LEN, PAYLOAD_LEN);
write_packet(txfd, fin_pkt, total_hdr_len, &daddr);
send_data_pkts(txfd, &daddr, PAYLOAD_LEN, PAYLOAD_LEN / 2);
write_packet(txfd, fin_pkt, total_hdr_len, &daddr);
send_data_pkts(txfd, &daddr, PAYLOAD_LEN / 2, PAYLOAD_LEN);
write_packet(txfd, fin_pkt, total_hdr_len, &daddr);
} else if (strcmp(testname, "ack") == 0) {
send_ack(txfd, &daddr);
write_packet(txfd, fin_pkt, total_hdr_len, &daddr);
} else if (strcmp(testname, "flags") == 0) {
send_flags(txfd, &daddr, 1, 0, 0, 0);
write_packet(txfd, fin_pkt, total_hdr_len, &daddr);
send_flags(txfd, &daddr, 0, 1, 0, 0);
write_packet(txfd, fin_pkt, total_hdr_len, &daddr);
send_flags(txfd, &daddr, 0, 0, 1, 0);
write_packet(txfd, fin_pkt, total_hdr_len, &daddr);
send_flags(txfd, &daddr, 0, 0, 0, 1);
write_packet(txfd, fin_pkt, total_hdr_len, &daddr);
} else if (strcmp(testname, "tcp") == 0) {
send_changed_checksum(txfd, &daddr);
write_packet(txfd, fin_pkt, total_hdr_len, &daddr);
send_changed_seq(txfd, &daddr);
write_packet(txfd, fin_pkt, total_hdr_len, &daddr);
send_changed_ts(txfd, &daddr);
write_packet(txfd, fin_pkt, total_hdr_len, &daddr);
send_diff_opt(txfd, &daddr);
write_packet(txfd, fin_pkt, total_hdr_len, &daddr);
} else if (strcmp(testname, "ip") == 0) {
send_changed_ECN(txfd, &daddr);
write_packet(txfd, fin_pkt, total_hdr_len, &daddr);
send_changed_tos(txfd, &daddr);
write_packet(txfd, fin_pkt, total_hdr_len, &daddr);
if (proto == PF_INET) {
/* Modified packets may be received out of order.
* Sleep function added to enforce test boundaries
* so that fin pkts are not received prior to other pkts.
*/
sleep(1);
send_changed_ttl(txfd, &daddr);
write_packet(txfd, fin_pkt, total_hdr_len, &daddr);
sleep(1);
send_ip_options(txfd, &daddr);
sleep(1);
write_packet(txfd, fin_pkt, total_hdr_len, &daddr);
sleep(1);
send_fragment4(txfd, &daddr);
sleep(1);
write_packet(txfd, fin_pkt, total_hdr_len, &daddr);
} else if (proto == PF_INET6) {
send_fragment6(txfd, &daddr);
write_packet(txfd, fin_pkt, total_hdr_len, &daddr);
}
} else if (strcmp(testname, "large") == 0) {
/* 20 is the difference between min iphdr size
* and min ipv6hdr size. Like MAX_HDR_SIZE,
* MAX_PAYLOAD is defined with the larger header of the two.
*/
int offset = proto == PF_INET ? 20 : 0;
int remainder = (MAX_PAYLOAD + offset) % MSS;
send_large(txfd, &daddr, remainder);
write_packet(txfd, fin_pkt, total_hdr_len, &daddr);
send_large(txfd, &daddr, remainder + 1);
write_packet(txfd, fin_pkt, total_hdr_len, &daddr);
} else {
error(1, 0, "Unknown testcase");
}
if (close(txfd))
error(1, errno, "socket close");
}
static void gro_receiver(void)
{
static int correct_payload[NUM_PACKETS];
int rxfd = -1;
rxfd = socket(PF_PACKET, SOCK_RAW, htons(ETH_P_NONE));
if (rxfd < 0)
error(1, 0, "socket creation");
setup_sock_filter(rxfd);
set_timeout(rxfd);
bind_packetsocket(rxfd);
memset(correct_payload, 0, sizeof(correct_payload));
if (strcmp(testname, "data") == 0) {
printf("pure data packet of same size: ");
correct_payload[0] = PAYLOAD_LEN * 2;
check_recv_pkts(rxfd, correct_payload, 1);
printf("large data packets followed by a smaller one: ");
correct_payload[0] = PAYLOAD_LEN * 1.5;
check_recv_pkts(rxfd, correct_payload, 1);
printf("small data packets followed by a larger one: ");
correct_payload[0] = PAYLOAD_LEN / 2;
correct_payload[1] = PAYLOAD_LEN;
check_recv_pkts(rxfd, correct_payload, 2);
} else if (strcmp(testname, "ack") == 0) {
printf("duplicate ack and pure ack: ");
check_recv_pkts(rxfd, correct_payload, 3);
} else if (strcmp(testname, "flags") == 0) {
correct_payload[0] = PAYLOAD_LEN * 3;
correct_payload[1] = PAYLOAD_LEN * 2;
printf("psh flag ends coalescing: ");
check_recv_pkts(rxfd, correct_payload, 2);
correct_payload[0] = PAYLOAD_LEN * 2;
correct_payload[1] = 0;
correct_payload[2] = PAYLOAD_LEN * 2;
printf("syn flag ends coalescing: ");
check_recv_pkts(rxfd, correct_payload, 3);
printf("rst flag ends coalescing: ");
check_recv_pkts(rxfd, correct_payload, 3);
printf("urg flag ends coalescing: ");
check_recv_pkts(rxfd, correct_payload, 3);
} else if (strcmp(testname, "tcp") == 0) {
correct_payload[0] = PAYLOAD_LEN;
correct_payload[1] = PAYLOAD_LEN;
correct_payload[2] = PAYLOAD_LEN;
correct_payload[3] = PAYLOAD_LEN;
printf("changed checksum does not coalesce: ");
check_recv_pkts(rxfd, correct_payload, 2);
printf("Wrong Seq number doesn't coalesce: ");
check_recv_pkts(rxfd, correct_payload, 2);
printf("Different timestamp doesn't coalesce: ");
correct_payload[0] = PAYLOAD_LEN * 2;
check_recv_pkts(rxfd, correct_payload, 4);
printf("Different options doesn't coalesce: ");
correct_payload[0] = PAYLOAD_LEN * 2;
check_recv_pkts(rxfd, correct_payload, 2);
} else if (strcmp(testname, "ip") == 0) {
correct_payload[0] = PAYLOAD_LEN;
correct_payload[1] = PAYLOAD_LEN;
printf("different ECN doesn't coalesce: ");
check_recv_pkts(rxfd, correct_payload, 2);
printf("different tos doesn't coalesce: ");
check_recv_pkts(rxfd, correct_payload, 2);
if (proto == PF_INET) {
printf("different ttl doesn't coalesce: ");
check_recv_pkts(rxfd, correct_payload, 2);
printf("ip options doesn't coalesce: ");
correct_payload[2] = PAYLOAD_LEN;
check_recv_pkts(rxfd, correct_payload, 3);
printf("fragmented ip4 doesn't coalesce: ");
check_recv_pkts(rxfd, correct_payload, 2);
} else if (proto == PF_INET6) {
/* GRO doesn't check for ipv6 hop limit when flushing.
* Hence no corresponding test to the ipv4 case.
*/
printf("fragmented ip6 doesn't coalesce: ");
correct_payload[0] = PAYLOAD_LEN * 2;
check_recv_pkts(rxfd, correct_payload, 2);
}
} else if (strcmp(testname, "large") == 0) {
int offset = proto == PF_INET ? 20 : 0;
int remainder = (MAX_PAYLOAD + offset) % MSS;
correct_payload[0] = (MAX_PAYLOAD + offset);
correct_payload[1] = remainder;
printf("Shouldn't coalesce if exceed IP max pkt size: ");
check_recv_pkts(rxfd, correct_payload, 2);
/* last segment sent individually, doesn't start new segment */
correct_payload[0] = correct_payload[0] - remainder;
correct_payload[1] = remainder + 1;
correct_payload[2] = remainder + 1;
check_recv_pkts(rxfd, correct_payload, 3);
} else {
error(1, 0, "Test case error, should never trigger");
}
if (close(rxfd))
error(1, 0, "socket close");
}
static void parse_args(int argc, char **argv)
{
static const struct option opts[] = {
{ "daddr", required_argument, NULL, 'd' },
{ "dmac", required_argument, NULL, 'D' },
{ "iface", required_argument, NULL, 'i' },
{ "ipv4", no_argument, NULL, '4' },
{ "ipv6", no_argument, NULL, '6' },
{ "rx", no_argument, NULL, 'r' },
{ "saddr", required_argument, NULL, 's' },
{ "smac", required_argument, NULL, 'S' },
{ "test", required_argument, NULL, 't' },
{ "verbose", no_argument, NULL, 'v' },
{ 0, 0, 0, 0 }
};
int c;
while ((c = getopt_long(argc, argv, "46d:D:i:rs:S:t:v", opts, NULL)) != -1) {
switch (c) {
case '4':
proto = PF_INET;
ethhdr_proto = htons(ETH_P_IP);
break;
case '6':
proto = PF_INET6;
ethhdr_proto = htons(ETH_P_IPV6);
break;
case 'd':
addr4_dst = addr6_dst = optarg;
break;
case 'D':
dmac = optarg;
break;
case 'i':
ifname = optarg;
break;
case 'r':
tx_socket = false;
break;
case 's':
addr4_src = addr6_src = optarg;
break;
case 'S':
smac = optarg;
break;
case 't':
testname = optarg;
break;
case 'v':
verbose = true;
break;
default:
error(1, 0, "%s invalid option %c\n", __func__, c);
break;
}
}
}
int main(int argc, char **argv)
{
parse_args(argc, argv);
if (proto == PF_INET) {
tcp_offset = ETH_HLEN + sizeof(struct iphdr);
total_hdr_len = tcp_offset + sizeof(struct tcphdr);
} else if (proto == PF_INET6) {
tcp_offset = ETH_HLEN + sizeof(struct ipv6hdr);
total_hdr_len = MAX_HDR_LEN;
} else {
error(1, 0, "Protocol family is not ipv4 or ipv6");
}
read_MAC(src_mac, smac);
read_MAC(dst_mac, dmac);
if (tx_socket)
gro_sender();
else
gro_receiver();
fprintf(stderr, "Gro::%s test passed.\n", testname);
return 0;
}
| linux-master | tools/testing/selftests/net/gro.c |
/* SPDX-License-Identifier: MIT */
/* based on linux-kernel/tools/testing/selftests/net/msg_zerocopy.c */
#include <assert.h>
#include <errno.h>
#include <error.h>
#include <fcntl.h>
#include <limits.h>
#include <stdbool.h>
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <arpa/inet.h>
#include <linux/errqueue.h>
#include <linux/if_packet.h>
#include <linux/io_uring.h>
#include <linux/ipv6.h>
#include <linux/socket.h>
#include <linux/sockios.h>
#include <net/ethernet.h>
#include <net/if.h>
#include <netinet/in.h>
#include <netinet/ip.h>
#include <netinet/ip6.h>
#include <netinet/tcp.h>
#include <netinet/udp.h>
#include <sys/ioctl.h>
#include <sys/mman.h>
#include <sys/resource.h>
#include <sys/socket.h>
#include <sys/stat.h>
#include <sys/time.h>
#include <sys/types.h>
#include <sys/un.h>
#include <sys/wait.h>
#define NOTIF_TAG 0xfffffffULL
#define NONZC_TAG 0
#define ZC_TAG 1
enum {
MODE_NONZC = 0,
MODE_ZC = 1,
MODE_ZC_FIXED = 2,
MODE_MIXED = 3,
};
static bool cfg_cork = false;
static int cfg_mode = MODE_ZC_FIXED;
static int cfg_nr_reqs = 8;
static int cfg_family = PF_UNSPEC;
static int cfg_payload_len;
static int cfg_port = 8000;
static int cfg_runtime_ms = 4200;
static socklen_t cfg_alen;
static struct sockaddr_storage cfg_dst_addr;
static char payload[IP_MAXPACKET] __attribute__((aligned(4096)));
struct io_sq_ring {
unsigned *head;
unsigned *tail;
unsigned *ring_mask;
unsigned *ring_entries;
unsigned *flags;
unsigned *array;
};
struct io_cq_ring {
unsigned *head;
unsigned *tail;
unsigned *ring_mask;
unsigned *ring_entries;
struct io_uring_cqe *cqes;
};
struct io_uring_sq {
unsigned *khead;
unsigned *ktail;
unsigned *kring_mask;
unsigned *kring_entries;
unsigned *kflags;
unsigned *kdropped;
unsigned *array;
struct io_uring_sqe *sqes;
unsigned sqe_head;
unsigned sqe_tail;
size_t ring_sz;
};
struct io_uring_cq {
unsigned *khead;
unsigned *ktail;
unsigned *kring_mask;
unsigned *kring_entries;
unsigned *koverflow;
struct io_uring_cqe *cqes;
size_t ring_sz;
};
struct io_uring {
struct io_uring_sq sq;
struct io_uring_cq cq;
int ring_fd;
};
#ifdef __alpha__
# ifndef __NR_io_uring_setup
# define __NR_io_uring_setup 535
# endif
# ifndef __NR_io_uring_enter
# define __NR_io_uring_enter 536
# endif
# ifndef __NR_io_uring_register
# define __NR_io_uring_register 537
# endif
#else /* !__alpha__ */
# ifndef __NR_io_uring_setup
# define __NR_io_uring_setup 425
# endif
# ifndef __NR_io_uring_enter
# define __NR_io_uring_enter 426
# endif
# ifndef __NR_io_uring_register
# define __NR_io_uring_register 427
# endif
#endif
#if defined(__x86_64) || defined(__i386__)
#define read_barrier() __asm__ __volatile__("":::"memory")
#define write_barrier() __asm__ __volatile__("":::"memory")
#else
#define read_barrier() __sync_synchronize()
#define write_barrier() __sync_synchronize()
#endif
static int io_uring_setup(unsigned int entries, struct io_uring_params *p)
{
return syscall(__NR_io_uring_setup, entries, p);
}
static int io_uring_enter(int fd, unsigned int to_submit,
unsigned int min_complete,
unsigned int flags, sigset_t *sig)
{
return syscall(__NR_io_uring_enter, fd, to_submit, min_complete,
flags, sig, _NSIG / 8);
}
static int io_uring_register_buffers(struct io_uring *ring,
const struct iovec *iovecs,
unsigned nr_iovecs)
{
int ret;
ret = syscall(__NR_io_uring_register, ring->ring_fd,
IORING_REGISTER_BUFFERS, iovecs, nr_iovecs);
return (ret < 0) ? -errno : ret;
}
static int io_uring_mmap(int fd, struct io_uring_params *p,
struct io_uring_sq *sq, struct io_uring_cq *cq)
{
size_t size;
void *ptr;
int ret;
sq->ring_sz = p->sq_off.array + p->sq_entries * sizeof(unsigned);
ptr = mmap(0, sq->ring_sz, PROT_READ | PROT_WRITE,
MAP_SHARED | MAP_POPULATE, fd, IORING_OFF_SQ_RING);
if (ptr == MAP_FAILED)
return -errno;
sq->khead = ptr + p->sq_off.head;
sq->ktail = ptr + p->sq_off.tail;
sq->kring_mask = ptr + p->sq_off.ring_mask;
sq->kring_entries = ptr + p->sq_off.ring_entries;
sq->kflags = ptr + p->sq_off.flags;
sq->kdropped = ptr + p->sq_off.dropped;
sq->array = ptr + p->sq_off.array;
size = p->sq_entries * sizeof(struct io_uring_sqe);
sq->sqes = mmap(0, size, PROT_READ | PROT_WRITE,
MAP_SHARED | MAP_POPULATE, fd, IORING_OFF_SQES);
if (sq->sqes == MAP_FAILED) {
ret = -errno;
err:
munmap(sq->khead, sq->ring_sz);
return ret;
}
cq->ring_sz = p->cq_off.cqes + p->cq_entries * sizeof(struct io_uring_cqe);
ptr = mmap(0, cq->ring_sz, PROT_READ | PROT_WRITE,
MAP_SHARED | MAP_POPULATE, fd, IORING_OFF_CQ_RING);
if (ptr == MAP_FAILED) {
ret = -errno;
munmap(sq->sqes, p->sq_entries * sizeof(struct io_uring_sqe));
goto err;
}
cq->khead = ptr + p->cq_off.head;
cq->ktail = ptr + p->cq_off.tail;
cq->kring_mask = ptr + p->cq_off.ring_mask;
cq->kring_entries = ptr + p->cq_off.ring_entries;
cq->koverflow = ptr + p->cq_off.overflow;
cq->cqes = ptr + p->cq_off.cqes;
return 0;
}
static int io_uring_queue_init(unsigned entries, struct io_uring *ring,
unsigned flags)
{
struct io_uring_params p;
int fd, ret;
memset(ring, 0, sizeof(*ring));
memset(&p, 0, sizeof(p));
p.flags = flags;
fd = io_uring_setup(entries, &p);
if (fd < 0)
return fd;
ret = io_uring_mmap(fd, &p, &ring->sq, &ring->cq);
if (!ret)
ring->ring_fd = fd;
else
close(fd);
return ret;
}
static int io_uring_submit(struct io_uring *ring)
{
struct io_uring_sq *sq = &ring->sq;
const unsigned mask = *sq->kring_mask;
unsigned ktail, submitted, to_submit;
int ret;
read_barrier();
if (*sq->khead != *sq->ktail) {
submitted = *sq->kring_entries;
goto submit;
}
if (sq->sqe_head == sq->sqe_tail)
return 0;
ktail = *sq->ktail;
to_submit = sq->sqe_tail - sq->sqe_head;
for (submitted = 0; submitted < to_submit; submitted++) {
read_barrier();
sq->array[ktail++ & mask] = sq->sqe_head++ & mask;
}
if (!submitted)
return 0;
if (*sq->ktail != ktail) {
write_barrier();
*sq->ktail = ktail;
write_barrier();
}
submit:
ret = io_uring_enter(ring->ring_fd, submitted, 0,
IORING_ENTER_GETEVENTS, NULL);
return ret < 0 ? -errno : ret;
}
static inline void io_uring_prep_send(struct io_uring_sqe *sqe, int sockfd,
const void *buf, size_t len, int flags)
{
memset(sqe, 0, sizeof(*sqe));
sqe->opcode = (__u8) IORING_OP_SEND;
sqe->fd = sockfd;
sqe->addr = (unsigned long) buf;
sqe->len = len;
sqe->msg_flags = (__u32) flags;
}
static inline void io_uring_prep_sendzc(struct io_uring_sqe *sqe, int sockfd,
const void *buf, size_t len, int flags,
unsigned zc_flags)
{
io_uring_prep_send(sqe, sockfd, buf, len, flags);
sqe->opcode = (__u8) IORING_OP_SEND_ZC;
sqe->ioprio = zc_flags;
}
static struct io_uring_sqe *io_uring_get_sqe(struct io_uring *ring)
{
struct io_uring_sq *sq = &ring->sq;
if (sq->sqe_tail + 1 - sq->sqe_head > *sq->kring_entries)
return NULL;
return &sq->sqes[sq->sqe_tail++ & *sq->kring_mask];
}
static int io_uring_wait_cqe(struct io_uring *ring, struct io_uring_cqe **cqe_ptr)
{
struct io_uring_cq *cq = &ring->cq;
const unsigned mask = *cq->kring_mask;
unsigned head = *cq->khead;
int ret;
*cqe_ptr = NULL;
do {
read_barrier();
if (head != *cq->ktail) {
*cqe_ptr = &cq->cqes[head & mask];
break;
}
ret = io_uring_enter(ring->ring_fd, 0, 1,
IORING_ENTER_GETEVENTS, NULL);
if (ret < 0)
return -errno;
} while (1);
return 0;
}
static inline void io_uring_cqe_seen(struct io_uring *ring)
{
*(&ring->cq)->khead += 1;
write_barrier();
}
static unsigned long gettimeofday_ms(void)
{
struct timeval tv;
gettimeofday(&tv, NULL);
return (tv.tv_sec * 1000) + (tv.tv_usec / 1000);
}
static void do_setsockopt(int fd, int level, int optname, int val)
{
if (setsockopt(fd, level, optname, &val, sizeof(val)))
error(1, errno, "setsockopt %d.%d: %d", level, optname, val);
}
static int do_setup_tx(int domain, int type, int protocol)
{
int fd;
fd = socket(domain, type, protocol);
if (fd == -1)
error(1, errno, "socket t");
do_setsockopt(fd, SOL_SOCKET, SO_SNDBUF, 1 << 21);
if (connect(fd, (void *) &cfg_dst_addr, cfg_alen))
error(1, errno, "connect");
return fd;
}
static void do_tx(int domain, int type, int protocol)
{
struct io_uring_sqe *sqe;
struct io_uring_cqe *cqe;
unsigned long packets = 0, bytes = 0;
struct io_uring ring;
struct iovec iov;
uint64_t tstop;
int i, fd, ret;
int compl_cqes = 0;
fd = do_setup_tx(domain, type, protocol);
ret = io_uring_queue_init(512, &ring, 0);
if (ret)
error(1, ret, "io_uring: queue init");
iov.iov_base = payload;
iov.iov_len = cfg_payload_len;
ret = io_uring_register_buffers(&ring, &iov, 1);
if (ret)
error(1, ret, "io_uring: buffer registration");
tstop = gettimeofday_ms() + cfg_runtime_ms;
do {
if (cfg_cork)
do_setsockopt(fd, IPPROTO_UDP, UDP_CORK, 1);
for (i = 0; i < cfg_nr_reqs; i++) {
unsigned zc_flags = 0;
unsigned buf_idx = 0;
unsigned mode = cfg_mode;
unsigned msg_flags = MSG_WAITALL;
if (cfg_mode == MODE_MIXED)
mode = rand() % 3;
sqe = io_uring_get_sqe(&ring);
if (mode == MODE_NONZC) {
io_uring_prep_send(sqe, fd, payload,
cfg_payload_len, msg_flags);
sqe->user_data = NONZC_TAG;
} else {
io_uring_prep_sendzc(sqe, fd, payload,
cfg_payload_len,
msg_flags, zc_flags);
if (mode == MODE_ZC_FIXED) {
sqe->ioprio |= IORING_RECVSEND_FIXED_BUF;
sqe->buf_index = buf_idx;
}
sqe->user_data = ZC_TAG;
}
}
ret = io_uring_submit(&ring);
if (ret != cfg_nr_reqs)
error(1, ret, "submit");
if (cfg_cork)
do_setsockopt(fd, IPPROTO_UDP, UDP_CORK, 0);
for (i = 0; i < cfg_nr_reqs; i++) {
ret = io_uring_wait_cqe(&ring, &cqe);
if (ret)
error(1, ret, "wait cqe");
if (cqe->user_data != NONZC_TAG &&
cqe->user_data != ZC_TAG)
error(1, -EINVAL, "invalid cqe->user_data");
if (cqe->flags & IORING_CQE_F_NOTIF) {
if (cqe->flags & IORING_CQE_F_MORE)
error(1, -EINVAL, "invalid notif flags");
if (compl_cqes <= 0)
error(1, -EINVAL, "notification mismatch");
compl_cqes--;
i--;
io_uring_cqe_seen(&ring);
continue;
}
if (cqe->flags & IORING_CQE_F_MORE) {
if (cqe->user_data != ZC_TAG)
error(1, cqe->res, "unexpected F_MORE");
compl_cqes++;
}
if (cqe->res >= 0) {
packets++;
bytes += cqe->res;
} else if (cqe->res != -EAGAIN) {
error(1, cqe->res, "send failed");
}
io_uring_cqe_seen(&ring);
}
} while (gettimeofday_ms() < tstop);
while (compl_cqes) {
ret = io_uring_wait_cqe(&ring, &cqe);
if (ret)
error(1, ret, "wait cqe");
if (cqe->flags & IORING_CQE_F_MORE)
error(1, -EINVAL, "invalid notif flags");
if (!(cqe->flags & IORING_CQE_F_NOTIF))
error(1, -EINVAL, "missing notif flag");
io_uring_cqe_seen(&ring);
compl_cqes--;
}
fprintf(stderr, "tx=%lu (MB=%lu), tx/s=%lu (MB/s=%lu)\n",
packets, bytes >> 20,
packets / (cfg_runtime_ms / 1000),
(bytes >> 20) / (cfg_runtime_ms / 1000));
if (close(fd))
error(1, errno, "close");
}
static void do_test(int domain, int type, int protocol)
{
int i;
for (i = 0; i < IP_MAXPACKET; i++)
payload[i] = 'a' + (i % 26);
do_tx(domain, type, protocol);
}
static void usage(const char *filepath)
{
error(1, 0, "Usage: %s (-4|-6) (udp|tcp) -D<dst_ip> [-s<payload size>] "
"[-t<time s>] [-n<batch>] [-p<port>] [-m<mode>]", filepath);
}
static void parse_opts(int argc, char **argv)
{
const int max_payload_len = sizeof(payload) -
sizeof(struct ipv6hdr) -
sizeof(struct tcphdr) -
40 /* max tcp options */;
struct sockaddr_in6 *addr6 = (void *) &cfg_dst_addr;
struct sockaddr_in *addr4 = (void *) &cfg_dst_addr;
char *daddr = NULL;
int c;
if (argc <= 1)
usage(argv[0]);
cfg_payload_len = max_payload_len;
while ((c = getopt(argc, argv, "46D:p:s:t:n:c:m:")) != -1) {
switch (c) {
case '4':
if (cfg_family != PF_UNSPEC)
error(1, 0, "Pass one of -4 or -6");
cfg_family = PF_INET;
cfg_alen = sizeof(struct sockaddr_in);
break;
case '6':
if (cfg_family != PF_UNSPEC)
error(1, 0, "Pass one of -4 or -6");
cfg_family = PF_INET6;
cfg_alen = sizeof(struct sockaddr_in6);
break;
case 'D':
daddr = optarg;
break;
case 'p':
cfg_port = strtoul(optarg, NULL, 0);
break;
case 's':
cfg_payload_len = strtoul(optarg, NULL, 0);
break;
case 't':
cfg_runtime_ms = 200 + strtoul(optarg, NULL, 10) * 1000;
break;
case 'n':
cfg_nr_reqs = strtoul(optarg, NULL, 0);
break;
case 'c':
cfg_cork = strtol(optarg, NULL, 0);
break;
case 'm':
cfg_mode = strtol(optarg, NULL, 0);
break;
}
}
switch (cfg_family) {
case PF_INET:
memset(addr4, 0, sizeof(*addr4));
addr4->sin_family = AF_INET;
addr4->sin_port = htons(cfg_port);
if (daddr &&
inet_pton(AF_INET, daddr, &(addr4->sin_addr)) != 1)
error(1, 0, "ipv4 parse error: %s", daddr);
break;
case PF_INET6:
memset(addr6, 0, sizeof(*addr6));
addr6->sin6_family = AF_INET6;
addr6->sin6_port = htons(cfg_port);
if (daddr &&
inet_pton(AF_INET6, daddr, &(addr6->sin6_addr)) != 1)
error(1, 0, "ipv6 parse error: %s", daddr);
break;
default:
error(1, 0, "illegal domain");
}
if (cfg_payload_len > max_payload_len)
error(1, 0, "-s: payload exceeds max (%d)", max_payload_len);
if (optind != argc - 1)
usage(argv[0]);
}
int main(int argc, char **argv)
{
const char *cfg_test = argv[argc - 1];
parse_opts(argc, argv);
if (!strcmp(cfg_test, "tcp"))
do_test(cfg_family, SOCK_STREAM, 0);
else if (!strcmp(cfg_test, "udp"))
do_test(cfg_family, SOCK_DGRAM, 0);
else
error(1, 0, "unknown cfg_test %s", cfg_test);
return 0;
}
| linux-master | tools/testing/selftests/net/io_uring_zerocopy_tx.c |
// SPDX-License-Identifier: GPL-2.0+
/*
* Author: Justin Iurman ([email protected])
*
* IOAM tester for IPv6, see ioam6.sh for details on each test case.
*/
#include <arpa/inet.h>
#include <errno.h>
#include <limits.h>
#include <linux/const.h>
#include <linux/if_ether.h>
#include <linux/ioam6.h>
#include <linux/ipv6.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
struct ioam_config {
__u32 id;
__u64 wide;
__u16 ingr_id;
__u16 egr_id;
__u32 ingr_wide;
__u32 egr_wide;
__u32 ns_data;
__u64 ns_wide;
__u32 sc_id;
__u8 hlim;
char *sc_data;
};
/*
* Be careful if you modify structs below - everything MUST be kept synchronized
* with configurations inside ioam6.sh and always reflect the same.
*/
static struct ioam_config node1 = {
.id = 1,
.wide = 11111111,
.ingr_id = 0xffff, /* default value */
.egr_id = 101,
.ingr_wide = 0xffffffff, /* default value */
.egr_wide = 101101,
.ns_data = 0xdeadbee0,
.ns_wide = 0xcafec0caf00dc0de,
.sc_id = 777,
.sc_data = "something that will be 4n-aligned",
.hlim = 64,
};
static struct ioam_config node2 = {
.id = 2,
.wide = 22222222,
.ingr_id = 201,
.egr_id = 202,
.ingr_wide = 201201,
.egr_wide = 202202,
.ns_data = 0xdeadbee1,
.ns_wide = 0xcafec0caf11dc0de,
.sc_id = 666,
.sc_data = "Hello there -Obi",
.hlim = 63,
};
static struct ioam_config node3 = {
.id = 3,
.wide = 33333333,
.ingr_id = 301,
.egr_id = 0xffff, /* default value */
.ingr_wide = 301301,
.egr_wide = 0xffffffff, /* default value */
.ns_data = 0xdeadbee2,
.ns_wide = 0xcafec0caf22dc0de,
.sc_id = 0xffffff, /* default value */
.sc_data = NULL,
.hlim = 62,
};
enum {
/**********
* OUTPUT *
**********/
TEST_OUT_UNDEF_NS,
TEST_OUT_NO_ROOM,
TEST_OUT_BIT0,
TEST_OUT_BIT1,
TEST_OUT_BIT2,
TEST_OUT_BIT3,
TEST_OUT_BIT4,
TEST_OUT_BIT5,
TEST_OUT_BIT6,
TEST_OUT_BIT7,
TEST_OUT_BIT8,
TEST_OUT_BIT9,
TEST_OUT_BIT10,
TEST_OUT_BIT11,
TEST_OUT_BIT22,
TEST_OUT_FULL_SUPP_TRACE,
/*********
* INPUT *
*********/
TEST_IN_UNDEF_NS,
TEST_IN_NO_ROOM,
TEST_IN_OFLAG,
TEST_IN_BIT0,
TEST_IN_BIT1,
TEST_IN_BIT2,
TEST_IN_BIT3,
TEST_IN_BIT4,
TEST_IN_BIT5,
TEST_IN_BIT6,
TEST_IN_BIT7,
TEST_IN_BIT8,
TEST_IN_BIT9,
TEST_IN_BIT10,
TEST_IN_BIT11,
TEST_IN_BIT22,
TEST_IN_FULL_SUPP_TRACE,
/**********
* GLOBAL *
**********/
TEST_FWD_FULL_SUPP_TRACE,
__TEST_MAX,
};
static int check_ioam_header(int tid, struct ioam6_trace_hdr *ioam6h,
__u32 trace_type, __u16 ioam_ns)
{
if (__be16_to_cpu(ioam6h->namespace_id) != ioam_ns ||
__be32_to_cpu(ioam6h->type_be32) != (trace_type << 8))
return 1;
switch (tid) {
case TEST_OUT_UNDEF_NS:
case TEST_IN_UNDEF_NS:
return ioam6h->overflow ||
ioam6h->nodelen != 1 ||
ioam6h->remlen != 1;
case TEST_OUT_NO_ROOM:
case TEST_IN_NO_ROOM:
case TEST_IN_OFLAG:
return !ioam6h->overflow ||
ioam6h->nodelen != 2 ||
ioam6h->remlen != 1;
case TEST_OUT_BIT0:
case TEST_IN_BIT0:
case TEST_OUT_BIT1:
case TEST_IN_BIT1:
case TEST_OUT_BIT2:
case TEST_IN_BIT2:
case TEST_OUT_BIT3:
case TEST_IN_BIT3:
case TEST_OUT_BIT4:
case TEST_IN_BIT4:
case TEST_OUT_BIT5:
case TEST_IN_BIT5:
case TEST_OUT_BIT6:
case TEST_IN_BIT6:
case TEST_OUT_BIT7:
case TEST_IN_BIT7:
case TEST_OUT_BIT11:
case TEST_IN_BIT11:
return ioam6h->overflow ||
ioam6h->nodelen != 1 ||
ioam6h->remlen;
case TEST_OUT_BIT8:
case TEST_IN_BIT8:
case TEST_OUT_BIT9:
case TEST_IN_BIT9:
case TEST_OUT_BIT10:
case TEST_IN_BIT10:
return ioam6h->overflow ||
ioam6h->nodelen != 2 ||
ioam6h->remlen;
case TEST_OUT_BIT22:
case TEST_IN_BIT22:
return ioam6h->overflow ||
ioam6h->nodelen ||
ioam6h->remlen;
case TEST_OUT_FULL_SUPP_TRACE:
case TEST_IN_FULL_SUPP_TRACE:
case TEST_FWD_FULL_SUPP_TRACE:
return ioam6h->overflow ||
ioam6h->nodelen != 15 ||
ioam6h->remlen;
default:
break;
}
return 1;
}
static int check_ioam6_data(__u8 **p, struct ioam6_trace_hdr *ioam6h,
const struct ioam_config cnf)
{
unsigned int len;
__u8 aligned;
__u64 raw64;
__u32 raw32;
if (ioam6h->type.bit0) {
raw32 = __be32_to_cpu(*((__u32 *)*p));
if (cnf.hlim != (raw32 >> 24) || cnf.id != (raw32 & 0xffffff))
return 1;
*p += sizeof(__u32);
}
if (ioam6h->type.bit1) {
raw32 = __be32_to_cpu(*((__u32 *)*p));
if (cnf.ingr_id != (raw32 >> 16) ||
cnf.egr_id != (raw32 & 0xffff))
return 1;
*p += sizeof(__u32);
}
if (ioam6h->type.bit2)
*p += sizeof(__u32);
if (ioam6h->type.bit3)
*p += sizeof(__u32);
if (ioam6h->type.bit4) {
if (__be32_to_cpu(*((__u32 *)*p)) != 0xffffffff)
return 1;
*p += sizeof(__u32);
}
if (ioam6h->type.bit5) {
if (__be32_to_cpu(*((__u32 *)*p)) != cnf.ns_data)
return 1;
*p += sizeof(__u32);
}
if (ioam6h->type.bit6)
*p += sizeof(__u32);
if (ioam6h->type.bit7) {
if (__be32_to_cpu(*((__u32 *)*p)) != 0xffffffff)
return 1;
*p += sizeof(__u32);
}
if (ioam6h->type.bit8) {
raw64 = __be64_to_cpu(*((__u64 *)*p));
if (cnf.hlim != (raw64 >> 56) ||
cnf.wide != (raw64 & 0xffffffffffffff))
return 1;
*p += sizeof(__u64);
}
if (ioam6h->type.bit9) {
if (__be32_to_cpu(*((__u32 *)*p)) != cnf.ingr_wide)
return 1;
*p += sizeof(__u32);
if (__be32_to_cpu(*((__u32 *)*p)) != cnf.egr_wide)
return 1;
*p += sizeof(__u32);
}
if (ioam6h->type.bit10) {
if (__be64_to_cpu(*((__u64 *)*p)) != cnf.ns_wide)
return 1;
*p += sizeof(__u64);
}
if (ioam6h->type.bit11) {
if (__be32_to_cpu(*((__u32 *)*p)) != 0xffffffff)
return 1;
*p += sizeof(__u32);
}
if (ioam6h->type.bit12) {
if (__be32_to_cpu(*((__u32 *)*p)) != 0xffffffff)
return 1;
*p += sizeof(__u32);
}
if (ioam6h->type.bit13) {
if (__be32_to_cpu(*((__u32 *)*p)) != 0xffffffff)
return 1;
*p += sizeof(__u32);
}
if (ioam6h->type.bit14) {
if (__be32_to_cpu(*((__u32 *)*p)) != 0xffffffff)
return 1;
*p += sizeof(__u32);
}
if (ioam6h->type.bit15) {
if (__be32_to_cpu(*((__u32 *)*p)) != 0xffffffff)
return 1;
*p += sizeof(__u32);
}
if (ioam6h->type.bit16) {
if (__be32_to_cpu(*((__u32 *)*p)) != 0xffffffff)
return 1;
*p += sizeof(__u32);
}
if (ioam6h->type.bit17) {
if (__be32_to_cpu(*((__u32 *)*p)) != 0xffffffff)
return 1;
*p += sizeof(__u32);
}
if (ioam6h->type.bit18) {
if (__be32_to_cpu(*((__u32 *)*p)) != 0xffffffff)
return 1;
*p += sizeof(__u32);
}
if (ioam6h->type.bit19) {
if (__be32_to_cpu(*((__u32 *)*p)) != 0xffffffff)
return 1;
*p += sizeof(__u32);
}
if (ioam6h->type.bit20) {
if (__be32_to_cpu(*((__u32 *)*p)) != 0xffffffff)
return 1;
*p += sizeof(__u32);
}
if (ioam6h->type.bit21) {
if (__be32_to_cpu(*((__u32 *)*p)) != 0xffffffff)
return 1;
*p += sizeof(__u32);
}
if (ioam6h->type.bit22) {
len = cnf.sc_data ? strlen(cnf.sc_data) : 0;
aligned = cnf.sc_data ? __ALIGN_KERNEL(len, 4) : 0;
raw32 = __be32_to_cpu(*((__u32 *)*p));
if (aligned != (raw32 >> 24) * 4 ||
cnf.sc_id != (raw32 & 0xffffff))
return 1;
*p += sizeof(__u32);
if (cnf.sc_data) {
if (strncmp((char *)*p, cnf.sc_data, len))
return 1;
*p += len;
aligned -= len;
while (aligned--) {
if (**p != '\0')
return 1;
*p += sizeof(__u8);
}
}
}
return 0;
}
static int check_ioam_header_and_data(int tid, struct ioam6_trace_hdr *ioam6h,
__u32 trace_type, __u16 ioam_ns)
{
__u8 *p;
if (check_ioam_header(tid, ioam6h, trace_type, ioam_ns))
return 1;
p = ioam6h->data + ioam6h->remlen * 4;
switch (tid) {
case TEST_OUT_BIT0:
case TEST_OUT_BIT1:
case TEST_OUT_BIT2:
case TEST_OUT_BIT3:
case TEST_OUT_BIT4:
case TEST_OUT_BIT5:
case TEST_OUT_BIT6:
case TEST_OUT_BIT7:
case TEST_OUT_BIT8:
case TEST_OUT_BIT9:
case TEST_OUT_BIT10:
case TEST_OUT_BIT11:
case TEST_OUT_BIT22:
case TEST_OUT_FULL_SUPP_TRACE:
return check_ioam6_data(&p, ioam6h, node1);
case TEST_IN_BIT0:
case TEST_IN_BIT1:
case TEST_IN_BIT2:
case TEST_IN_BIT3:
case TEST_IN_BIT4:
case TEST_IN_BIT5:
case TEST_IN_BIT6:
case TEST_IN_BIT7:
case TEST_IN_BIT8:
case TEST_IN_BIT9:
case TEST_IN_BIT10:
case TEST_IN_BIT11:
case TEST_IN_BIT22:
case TEST_IN_FULL_SUPP_TRACE:
{
__u32 tmp32 = node2.egr_wide;
__u16 tmp16 = node2.egr_id;
int res;
node2.egr_id = 0xffff;
node2.egr_wide = 0xffffffff;
res = check_ioam6_data(&p, ioam6h, node2);
node2.egr_id = tmp16;
node2.egr_wide = tmp32;
return res;
}
case TEST_FWD_FULL_SUPP_TRACE:
if (check_ioam6_data(&p, ioam6h, node3))
return 1;
if (check_ioam6_data(&p, ioam6h, node2))
return 1;
return check_ioam6_data(&p, ioam6h, node1);
default:
break;
}
return 1;
}
static int str2id(const char *tname)
{
if (!strcmp("out_undef_ns", tname))
return TEST_OUT_UNDEF_NS;
if (!strcmp("out_no_room", tname))
return TEST_OUT_NO_ROOM;
if (!strcmp("out_bit0", tname))
return TEST_OUT_BIT0;
if (!strcmp("out_bit1", tname))
return TEST_OUT_BIT1;
if (!strcmp("out_bit2", tname))
return TEST_OUT_BIT2;
if (!strcmp("out_bit3", tname))
return TEST_OUT_BIT3;
if (!strcmp("out_bit4", tname))
return TEST_OUT_BIT4;
if (!strcmp("out_bit5", tname))
return TEST_OUT_BIT5;
if (!strcmp("out_bit6", tname))
return TEST_OUT_BIT6;
if (!strcmp("out_bit7", tname))
return TEST_OUT_BIT7;
if (!strcmp("out_bit8", tname))
return TEST_OUT_BIT8;
if (!strcmp("out_bit9", tname))
return TEST_OUT_BIT9;
if (!strcmp("out_bit10", tname))
return TEST_OUT_BIT10;
if (!strcmp("out_bit11", tname))
return TEST_OUT_BIT11;
if (!strcmp("out_bit22", tname))
return TEST_OUT_BIT22;
if (!strcmp("out_full_supp_trace", tname))
return TEST_OUT_FULL_SUPP_TRACE;
if (!strcmp("in_undef_ns", tname))
return TEST_IN_UNDEF_NS;
if (!strcmp("in_no_room", tname))
return TEST_IN_NO_ROOM;
if (!strcmp("in_oflag", tname))
return TEST_IN_OFLAG;
if (!strcmp("in_bit0", tname))
return TEST_IN_BIT0;
if (!strcmp("in_bit1", tname))
return TEST_IN_BIT1;
if (!strcmp("in_bit2", tname))
return TEST_IN_BIT2;
if (!strcmp("in_bit3", tname))
return TEST_IN_BIT3;
if (!strcmp("in_bit4", tname))
return TEST_IN_BIT4;
if (!strcmp("in_bit5", tname))
return TEST_IN_BIT5;
if (!strcmp("in_bit6", tname))
return TEST_IN_BIT6;
if (!strcmp("in_bit7", tname))
return TEST_IN_BIT7;
if (!strcmp("in_bit8", tname))
return TEST_IN_BIT8;
if (!strcmp("in_bit9", tname))
return TEST_IN_BIT9;
if (!strcmp("in_bit10", tname))
return TEST_IN_BIT10;
if (!strcmp("in_bit11", tname))
return TEST_IN_BIT11;
if (!strcmp("in_bit22", tname))
return TEST_IN_BIT22;
if (!strcmp("in_full_supp_trace", tname))
return TEST_IN_FULL_SUPP_TRACE;
if (!strcmp("fwd_full_supp_trace", tname))
return TEST_FWD_FULL_SUPP_TRACE;
return -1;
}
static int ipv6_addr_equal(const struct in6_addr *a1, const struct in6_addr *a2)
{
return ((a1->s6_addr32[0] ^ a2->s6_addr32[0]) |
(a1->s6_addr32[1] ^ a2->s6_addr32[1]) |
(a1->s6_addr32[2] ^ a2->s6_addr32[2]) |
(a1->s6_addr32[3] ^ a2->s6_addr32[3])) == 0;
}
static int get_u32(__u32 *val, const char *arg, int base)
{
unsigned long res;
char *ptr;
if (!arg || !*arg)
return -1;
res = strtoul(arg, &ptr, base);
if (!ptr || ptr == arg || *ptr)
return -1;
if (res == ULONG_MAX && errno == ERANGE)
return -1;
if (res > 0xFFFFFFFFUL)
return -1;
*val = res;
return 0;
}
static int get_u16(__u16 *val, const char *arg, int base)
{
unsigned long res;
char *ptr;
if (!arg || !*arg)
return -1;
res = strtoul(arg, &ptr, base);
if (!ptr || ptr == arg || *ptr)
return -1;
if (res == ULONG_MAX && errno == ERANGE)
return -1;
if (res > 0xFFFFUL)
return -1;
*val = res;
return 0;
}
static int (*func[__TEST_MAX])(int, struct ioam6_trace_hdr *, __u32, __u16) = {
[TEST_OUT_UNDEF_NS] = check_ioam_header,
[TEST_OUT_NO_ROOM] = check_ioam_header,
[TEST_OUT_BIT0] = check_ioam_header_and_data,
[TEST_OUT_BIT1] = check_ioam_header_and_data,
[TEST_OUT_BIT2] = check_ioam_header_and_data,
[TEST_OUT_BIT3] = check_ioam_header_and_data,
[TEST_OUT_BIT4] = check_ioam_header_and_data,
[TEST_OUT_BIT5] = check_ioam_header_and_data,
[TEST_OUT_BIT6] = check_ioam_header_and_data,
[TEST_OUT_BIT7] = check_ioam_header_and_data,
[TEST_OUT_BIT8] = check_ioam_header_and_data,
[TEST_OUT_BIT9] = check_ioam_header_and_data,
[TEST_OUT_BIT10] = check_ioam_header_and_data,
[TEST_OUT_BIT11] = check_ioam_header_and_data,
[TEST_OUT_BIT22] = check_ioam_header_and_data,
[TEST_OUT_FULL_SUPP_TRACE] = check_ioam_header_and_data,
[TEST_IN_UNDEF_NS] = check_ioam_header,
[TEST_IN_NO_ROOM] = check_ioam_header,
[TEST_IN_OFLAG] = check_ioam_header,
[TEST_IN_BIT0] = check_ioam_header_and_data,
[TEST_IN_BIT1] = check_ioam_header_and_data,
[TEST_IN_BIT2] = check_ioam_header_and_data,
[TEST_IN_BIT3] = check_ioam_header_and_data,
[TEST_IN_BIT4] = check_ioam_header_and_data,
[TEST_IN_BIT5] = check_ioam_header_and_data,
[TEST_IN_BIT6] = check_ioam_header_and_data,
[TEST_IN_BIT7] = check_ioam_header_and_data,
[TEST_IN_BIT8] = check_ioam_header_and_data,
[TEST_IN_BIT9] = check_ioam_header_and_data,
[TEST_IN_BIT10] = check_ioam_header_and_data,
[TEST_IN_BIT11] = check_ioam_header_and_data,
[TEST_IN_BIT22] = check_ioam_header_and_data,
[TEST_IN_FULL_SUPP_TRACE] = check_ioam_header_and_data,
[TEST_FWD_FULL_SUPP_TRACE] = check_ioam_header_and_data,
};
int main(int argc, char **argv)
{
int fd, size, hoplen, tid, ret = 1;
struct in6_addr src, dst;
struct ioam6_hdr *opt;
struct ipv6hdr *ip6h;
__u8 buffer[400], *p;
__u16 ioam_ns;
__u32 tr_type;
if (argc != 7)
goto out;
tid = str2id(argv[2]);
if (tid < 0 || !func[tid])
goto out;
if (inet_pton(AF_INET6, argv[3], &src) != 1 ||
inet_pton(AF_INET6, argv[4], &dst) != 1)
goto out;
if (get_u32(&tr_type, argv[5], 16) ||
get_u16(&ioam_ns, argv[6], 0))
goto out;
fd = socket(AF_PACKET, SOCK_DGRAM, __cpu_to_be16(ETH_P_IPV6));
if (!fd)
goto out;
if (setsockopt(fd, SOL_SOCKET, SO_BINDTODEVICE,
argv[1], strlen(argv[1])))
goto close;
recv:
size = recv(fd, buffer, sizeof(buffer), 0);
if (size <= 0)
goto close;
ip6h = (struct ipv6hdr *)buffer;
if (!ipv6_addr_equal(&ip6h->saddr, &src) ||
!ipv6_addr_equal(&ip6h->daddr, &dst))
goto recv;
if (ip6h->nexthdr != IPPROTO_HOPOPTS)
goto close;
p = buffer + sizeof(*ip6h);
hoplen = (p[1] + 1) << 3;
p += sizeof(struct ipv6_hopopt_hdr);
while (hoplen > 0) {
opt = (struct ioam6_hdr *)p;
if (opt->opt_type == IPV6_TLV_IOAM &&
opt->type == IOAM6_TYPE_PREALLOC) {
p += sizeof(*opt);
ret = func[tid](tid, (struct ioam6_trace_hdr *)p,
tr_type, ioam_ns);
break;
}
p += opt->opt_len + 2;
hoplen -= opt->opt_len + 2;
}
close:
close(fd);
out:
return ret;
}
| linux-master | tools/testing/selftests/net/ioam6_parser.c |
// SPDX-License-Identifier: GPL-2.0
/*
* ipsec.c - Check xfrm on veth inside a net-ns.
* Copyright (c) 2018 Dmitry Safonov
*/
#define _GNU_SOURCE
#include <arpa/inet.h>
#include <asm/types.h>
#include <errno.h>
#include <fcntl.h>
#include <limits.h>
#include <linux/limits.h>
#include <linux/netlink.h>
#include <linux/random.h>
#include <linux/rtnetlink.h>
#include <linux/veth.h>
#include <linux/xfrm.h>
#include <netinet/in.h>
#include <net/if.h>
#include <sched.h>
#include <stdbool.h>
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/mman.h>
#include <sys/socket.h>
#include <sys/stat.h>
#include <sys/syscall.h>
#include <sys/types.h>
#include <sys/wait.h>
#include <time.h>
#include <unistd.h>
#include "../kselftest.h"
#define printk(fmt, ...) \
ksft_print_msg("%d[%u] " fmt "\n", getpid(), __LINE__, ##__VA_ARGS__)
#define pr_err(fmt, ...) printk(fmt ": %m", ##__VA_ARGS__)
#define BUILD_BUG_ON(condition) ((void)sizeof(char[1 - 2*!!(condition)]))
#define IPV4_STR_SZ 16 /* xxx.xxx.xxx.xxx is longest + \0 */
#define MAX_PAYLOAD 2048
#define XFRM_ALGO_KEY_BUF_SIZE 512
#define MAX_PROCESSES (1 << 14) /* /16 mask divided by /30 subnets */
#define INADDR_A ((in_addr_t) 0x0a000000) /* 10.0.0.0 */
#define INADDR_B ((in_addr_t) 0xc0a80000) /* 192.168.0.0 */
/* /30 mask for one veth connection */
#define PREFIX_LEN 30
#define child_ip(nr) (4*nr + 1)
#define grchild_ip(nr) (4*nr + 2)
#define VETH_FMT "ktst-%d"
#define VETH_LEN 12
#define XFRM_ALGO_NR_KEYS 29
static int nsfd_parent = -1;
static int nsfd_childa = -1;
static int nsfd_childb = -1;
static long page_size;
/*
* ksft_cnt is static in kselftest, so isn't shared with children.
* We have to send a test result back to parent and count there.
* results_fd is a pipe with test feedback from children.
*/
static int results_fd[2];
const unsigned int ping_delay_nsec = 50 * 1000 * 1000;
const unsigned int ping_timeout = 300;
const unsigned int ping_count = 100;
const unsigned int ping_success = 80;
struct xfrm_key_entry {
char algo_name[35];
int key_len;
};
struct xfrm_key_entry xfrm_key_entries[] = {
{"digest_null", 0},
{"ecb(cipher_null)", 0},
{"cbc(des)", 64},
{"hmac(md5)", 128},
{"cmac(aes)", 128},
{"xcbc(aes)", 128},
{"cbc(cast5)", 128},
{"cbc(serpent)", 128},
{"hmac(sha1)", 160},
{"hmac(rmd160)", 160},
{"cbc(des3_ede)", 192},
{"hmac(sha256)", 256},
{"cbc(aes)", 256},
{"cbc(camellia)", 256},
{"cbc(twofish)", 256},
{"rfc3686(ctr(aes))", 288},
{"hmac(sha384)", 384},
{"cbc(blowfish)", 448},
{"hmac(sha512)", 512},
{"rfc4106(gcm(aes))-128", 160},
{"rfc4543(gcm(aes))-128", 160},
{"rfc4309(ccm(aes))-128", 152},
{"rfc4106(gcm(aes))-192", 224},
{"rfc4543(gcm(aes))-192", 224},
{"rfc4309(ccm(aes))-192", 216},
{"rfc4106(gcm(aes))-256", 288},
{"rfc4543(gcm(aes))-256", 288},
{"rfc4309(ccm(aes))-256", 280},
{"rfc7539(chacha20,poly1305)-128", 0}
};
static void randomize_buffer(void *buf, size_t buflen)
{
int *p = (int *)buf;
size_t words = buflen / sizeof(int);
size_t leftover = buflen % sizeof(int);
if (!buflen)
return;
while (words--)
*p++ = rand();
if (leftover) {
int tmp = rand();
memcpy(buf + buflen - leftover, &tmp, leftover);
}
return;
}
static int unshare_open(void)
{
const char *netns_path = "/proc/self/ns/net";
int fd;
if (unshare(CLONE_NEWNET) != 0) {
pr_err("unshare()");
return -1;
}
fd = open(netns_path, O_RDONLY);
if (fd <= 0) {
pr_err("open(%s)", netns_path);
return -1;
}
return fd;
}
static int switch_ns(int fd)
{
if (setns(fd, CLONE_NEWNET)) {
pr_err("setns()");
return -1;
}
return 0;
}
/*
* Running the test inside a new parent net namespace to bother less
* about cleanup on error-path.
*/
static int init_namespaces(void)
{
nsfd_parent = unshare_open();
if (nsfd_parent <= 0)
return -1;
nsfd_childa = unshare_open();
if (nsfd_childa <= 0)
return -1;
if (switch_ns(nsfd_parent))
return -1;
nsfd_childb = unshare_open();
if (nsfd_childb <= 0)
return -1;
if (switch_ns(nsfd_parent))
return -1;
return 0;
}
static int netlink_sock(int *sock, uint32_t *seq_nr, int proto)
{
if (*sock > 0) {
seq_nr++;
return 0;
}
*sock = socket(AF_NETLINK, SOCK_RAW | SOCK_CLOEXEC, proto);
if (*sock <= 0) {
pr_err("socket(AF_NETLINK)");
return -1;
}
randomize_buffer(seq_nr, sizeof(*seq_nr));
return 0;
}
static inline struct rtattr *rtattr_hdr(struct nlmsghdr *nh)
{
return (struct rtattr *)((char *)(nh) + RTA_ALIGN((nh)->nlmsg_len));
}
static int rtattr_pack(struct nlmsghdr *nh, size_t req_sz,
unsigned short rta_type, const void *payload, size_t size)
{
/* NLMSG_ALIGNTO == RTA_ALIGNTO, nlmsg_len already aligned */
struct rtattr *attr = rtattr_hdr(nh);
size_t nl_size = RTA_ALIGN(nh->nlmsg_len) + RTA_LENGTH(size);
if (req_sz < nl_size) {
printk("req buf is too small: %zu < %zu", req_sz, nl_size);
return -1;
}
nh->nlmsg_len = nl_size;
attr->rta_len = RTA_LENGTH(size);
attr->rta_type = rta_type;
memcpy(RTA_DATA(attr), payload, size);
return 0;
}
static struct rtattr *_rtattr_begin(struct nlmsghdr *nh, size_t req_sz,
unsigned short rta_type, const void *payload, size_t size)
{
struct rtattr *ret = rtattr_hdr(nh);
if (rtattr_pack(nh, req_sz, rta_type, payload, size))
return 0;
return ret;
}
static inline struct rtattr *rtattr_begin(struct nlmsghdr *nh, size_t req_sz,
unsigned short rta_type)
{
return _rtattr_begin(nh, req_sz, rta_type, 0, 0);
}
static inline void rtattr_end(struct nlmsghdr *nh, struct rtattr *attr)
{
char *nlmsg_end = (char *)nh + nh->nlmsg_len;
attr->rta_len = nlmsg_end - (char *)attr;
}
static int veth_pack_peerb(struct nlmsghdr *nh, size_t req_sz,
const char *peer, int ns)
{
struct ifinfomsg pi;
struct rtattr *peer_attr;
memset(&pi, 0, sizeof(pi));
pi.ifi_family = AF_UNSPEC;
pi.ifi_change = 0xFFFFFFFF;
peer_attr = _rtattr_begin(nh, req_sz, VETH_INFO_PEER, &pi, sizeof(pi));
if (!peer_attr)
return -1;
if (rtattr_pack(nh, req_sz, IFLA_IFNAME, peer, strlen(peer)))
return -1;
if (rtattr_pack(nh, req_sz, IFLA_NET_NS_FD, &ns, sizeof(ns)))
return -1;
rtattr_end(nh, peer_attr);
return 0;
}
static int netlink_check_answer(int sock)
{
struct nlmsgerror {
struct nlmsghdr hdr;
int error;
struct nlmsghdr orig_msg;
} answer;
if (recv(sock, &answer, sizeof(answer), 0) < 0) {
pr_err("recv()");
return -1;
} else if (answer.hdr.nlmsg_type != NLMSG_ERROR) {
printk("expected NLMSG_ERROR, got %d", (int)answer.hdr.nlmsg_type);
return -1;
} else if (answer.error) {
printk("NLMSG_ERROR: %d: %s",
answer.error, strerror(-answer.error));
return answer.error;
}
return 0;
}
static int veth_add(int sock, uint32_t seq, const char *peera, int ns_a,
const char *peerb, int ns_b)
{
uint16_t flags = NLM_F_REQUEST | NLM_F_ACK | NLM_F_EXCL | NLM_F_CREATE;
struct {
struct nlmsghdr nh;
struct ifinfomsg info;
char attrbuf[MAX_PAYLOAD];
} req;
const char veth_type[] = "veth";
struct rtattr *link_info, *info_data;
memset(&req, 0, sizeof(req));
req.nh.nlmsg_len = NLMSG_LENGTH(sizeof(req.info));
req.nh.nlmsg_type = RTM_NEWLINK;
req.nh.nlmsg_flags = flags;
req.nh.nlmsg_seq = seq;
req.info.ifi_family = AF_UNSPEC;
req.info.ifi_change = 0xFFFFFFFF;
if (rtattr_pack(&req.nh, sizeof(req), IFLA_IFNAME, peera, strlen(peera)))
return -1;
if (rtattr_pack(&req.nh, sizeof(req), IFLA_NET_NS_FD, &ns_a, sizeof(ns_a)))
return -1;
link_info = rtattr_begin(&req.nh, sizeof(req), IFLA_LINKINFO);
if (!link_info)
return -1;
if (rtattr_pack(&req.nh, sizeof(req), IFLA_INFO_KIND, veth_type, sizeof(veth_type)))
return -1;
info_data = rtattr_begin(&req.nh, sizeof(req), IFLA_INFO_DATA);
if (!info_data)
return -1;
if (veth_pack_peerb(&req.nh, sizeof(req), peerb, ns_b))
return -1;
rtattr_end(&req.nh, info_data);
rtattr_end(&req.nh, link_info);
if (send(sock, &req, req.nh.nlmsg_len, 0) < 0) {
pr_err("send()");
return -1;
}
return netlink_check_answer(sock);
}
static int ip4_addr_set(int sock, uint32_t seq, const char *intf,
struct in_addr addr, uint8_t prefix)
{
uint16_t flags = NLM_F_REQUEST | NLM_F_ACK | NLM_F_EXCL | NLM_F_CREATE;
struct {
struct nlmsghdr nh;
struct ifaddrmsg info;
char attrbuf[MAX_PAYLOAD];
} req;
memset(&req, 0, sizeof(req));
req.nh.nlmsg_len = NLMSG_LENGTH(sizeof(req.info));
req.nh.nlmsg_type = RTM_NEWADDR;
req.nh.nlmsg_flags = flags;
req.nh.nlmsg_seq = seq;
req.info.ifa_family = AF_INET;
req.info.ifa_prefixlen = prefix;
req.info.ifa_index = if_nametoindex(intf);
#ifdef DEBUG
{
char addr_str[IPV4_STR_SZ] = {};
strncpy(addr_str, inet_ntoa(addr), IPV4_STR_SZ - 1);
printk("ip addr set %s", addr_str);
}
#endif
if (rtattr_pack(&req.nh, sizeof(req), IFA_LOCAL, &addr, sizeof(addr)))
return -1;
if (rtattr_pack(&req.nh, sizeof(req), IFA_ADDRESS, &addr, sizeof(addr)))
return -1;
if (send(sock, &req, req.nh.nlmsg_len, 0) < 0) {
pr_err("send()");
return -1;
}
return netlink_check_answer(sock);
}
static int link_set_up(int sock, uint32_t seq, const char *intf)
{
struct {
struct nlmsghdr nh;
struct ifinfomsg info;
char attrbuf[MAX_PAYLOAD];
} req;
memset(&req, 0, sizeof(req));
req.nh.nlmsg_len = NLMSG_LENGTH(sizeof(req.info));
req.nh.nlmsg_type = RTM_NEWLINK;
req.nh.nlmsg_flags = NLM_F_REQUEST | NLM_F_ACK;
req.nh.nlmsg_seq = seq;
req.info.ifi_family = AF_UNSPEC;
req.info.ifi_change = 0xFFFFFFFF;
req.info.ifi_index = if_nametoindex(intf);
req.info.ifi_flags = IFF_UP;
req.info.ifi_change = IFF_UP;
if (send(sock, &req, req.nh.nlmsg_len, 0) < 0) {
pr_err("send()");
return -1;
}
return netlink_check_answer(sock);
}
static int ip4_route_set(int sock, uint32_t seq, const char *intf,
struct in_addr src, struct in_addr dst)
{
struct {
struct nlmsghdr nh;
struct rtmsg rt;
char attrbuf[MAX_PAYLOAD];
} req;
unsigned int index = if_nametoindex(intf);
memset(&req, 0, sizeof(req));
req.nh.nlmsg_len = NLMSG_LENGTH(sizeof(req.rt));
req.nh.nlmsg_type = RTM_NEWROUTE;
req.nh.nlmsg_flags = NLM_F_REQUEST | NLM_F_ACK | NLM_F_CREATE;
req.nh.nlmsg_seq = seq;
req.rt.rtm_family = AF_INET;
req.rt.rtm_dst_len = 32;
req.rt.rtm_table = RT_TABLE_MAIN;
req.rt.rtm_protocol = RTPROT_BOOT;
req.rt.rtm_scope = RT_SCOPE_LINK;
req.rt.rtm_type = RTN_UNICAST;
if (rtattr_pack(&req.nh, sizeof(req), RTA_DST, &dst, sizeof(dst)))
return -1;
if (rtattr_pack(&req.nh, sizeof(req), RTA_PREFSRC, &src, sizeof(src)))
return -1;
if (rtattr_pack(&req.nh, sizeof(req), RTA_OIF, &index, sizeof(index)))
return -1;
if (send(sock, &req, req.nh.nlmsg_len, 0) < 0) {
pr_err("send()");
return -1;
}
return netlink_check_answer(sock);
}
static int tunnel_set_route(int route_sock, uint32_t *route_seq, char *veth,
struct in_addr tunsrc, struct in_addr tundst)
{
if (ip4_addr_set(route_sock, (*route_seq)++, "lo",
tunsrc, PREFIX_LEN)) {
printk("Failed to set ipv4 addr");
return -1;
}
if (ip4_route_set(route_sock, (*route_seq)++, veth, tunsrc, tundst)) {
printk("Failed to set ipv4 route");
return -1;
}
return 0;
}
static int init_child(int nsfd, char *veth, unsigned int src, unsigned int dst)
{
struct in_addr intsrc = inet_makeaddr(INADDR_B, src);
struct in_addr tunsrc = inet_makeaddr(INADDR_A, src);
struct in_addr tundst = inet_makeaddr(INADDR_A, dst);
int route_sock = -1, ret = -1;
uint32_t route_seq;
if (switch_ns(nsfd))
return -1;
if (netlink_sock(&route_sock, &route_seq, NETLINK_ROUTE)) {
printk("Failed to open netlink route socket in child");
return -1;
}
if (ip4_addr_set(route_sock, route_seq++, veth, intsrc, PREFIX_LEN)) {
printk("Failed to set ipv4 addr");
goto err;
}
if (link_set_up(route_sock, route_seq++, veth)) {
printk("Failed to bring up %s", veth);
goto err;
}
if (tunnel_set_route(route_sock, &route_seq, veth, tunsrc, tundst)) {
printk("Failed to add tunnel route on %s", veth);
goto err;
}
ret = 0;
err:
close(route_sock);
return ret;
}
#define ALGO_LEN 64
enum desc_type {
CREATE_TUNNEL = 0,
ALLOCATE_SPI,
MONITOR_ACQUIRE,
EXPIRE_STATE,
EXPIRE_POLICY,
SPDINFO_ATTRS,
};
const char *desc_name[] = {
"create tunnel",
"alloc spi",
"monitor acquire",
"expire state",
"expire policy",
"spdinfo attributes",
""
};
struct xfrm_desc {
enum desc_type type;
uint8_t proto;
char a_algo[ALGO_LEN];
char e_algo[ALGO_LEN];
char c_algo[ALGO_LEN];
char ae_algo[ALGO_LEN];
unsigned int icv_len;
/* unsigned key_len; */
};
enum msg_type {
MSG_ACK = 0,
MSG_EXIT,
MSG_PING,
MSG_XFRM_PREPARE,
MSG_XFRM_ADD,
MSG_XFRM_DEL,
MSG_XFRM_CLEANUP,
};
struct test_desc {
enum msg_type type;
union {
struct {
in_addr_t reply_ip;
unsigned int port;
} ping;
struct xfrm_desc xfrm_desc;
} body;
};
struct test_result {
struct xfrm_desc desc;
unsigned int res;
};
static void write_test_result(unsigned int res, struct xfrm_desc *d)
{
struct test_result tr = {};
ssize_t ret;
tr.desc = *d;
tr.res = res;
ret = write(results_fd[1], &tr, sizeof(tr));
if (ret != sizeof(tr))
pr_err("Failed to write the result in pipe %zd", ret);
}
static void write_msg(int fd, struct test_desc *msg, bool exit_of_fail)
{
ssize_t bytes = write(fd, msg, sizeof(*msg));
/* Make sure that write/read is atomic to a pipe */
BUILD_BUG_ON(sizeof(struct test_desc) > PIPE_BUF);
if (bytes < 0) {
pr_err("write()");
if (exit_of_fail)
exit(KSFT_FAIL);
}
if (bytes != sizeof(*msg)) {
pr_err("sent part of the message %zd/%zu", bytes, sizeof(*msg));
if (exit_of_fail)
exit(KSFT_FAIL);
}
}
static void read_msg(int fd, struct test_desc *msg, bool exit_of_fail)
{
ssize_t bytes = read(fd, msg, sizeof(*msg));
if (bytes < 0) {
pr_err("read()");
if (exit_of_fail)
exit(KSFT_FAIL);
}
if (bytes != sizeof(*msg)) {
pr_err("got incomplete message %zd/%zu", bytes, sizeof(*msg));
if (exit_of_fail)
exit(KSFT_FAIL);
}
}
static int udp_ping_init(struct in_addr listen_ip, unsigned int u_timeout,
unsigned int *server_port, int sock[2])
{
struct sockaddr_in server;
struct timeval t = { .tv_sec = 0, .tv_usec = u_timeout };
socklen_t s_len = sizeof(server);
sock[0] = socket(AF_INET, SOCK_DGRAM, 0);
if (sock[0] < 0) {
pr_err("socket()");
return -1;
}
server.sin_family = AF_INET;
server.sin_port = 0;
memcpy(&server.sin_addr.s_addr, &listen_ip, sizeof(struct in_addr));
if (bind(sock[0], (struct sockaddr *)&server, s_len)) {
pr_err("bind()");
goto err_close_server;
}
if (getsockname(sock[0], (struct sockaddr *)&server, &s_len)) {
pr_err("getsockname()");
goto err_close_server;
}
*server_port = ntohs(server.sin_port);
if (setsockopt(sock[0], SOL_SOCKET, SO_RCVTIMEO, (const char *)&t, sizeof t)) {
pr_err("setsockopt()");
goto err_close_server;
}
sock[1] = socket(AF_INET, SOCK_DGRAM, 0);
if (sock[1] < 0) {
pr_err("socket()");
goto err_close_server;
}
return 0;
err_close_server:
close(sock[0]);
return -1;
}
static int udp_ping_send(int sock[2], in_addr_t dest_ip, unsigned int port,
char *buf, size_t buf_len)
{
struct sockaddr_in server;
const struct sockaddr *dest_addr = (struct sockaddr *)&server;
char *sock_buf[buf_len];
ssize_t r_bytes, s_bytes;
server.sin_family = AF_INET;
server.sin_port = htons(port);
server.sin_addr.s_addr = dest_ip;
s_bytes = sendto(sock[1], buf, buf_len, 0, dest_addr, sizeof(server));
if (s_bytes < 0) {
pr_err("sendto()");
return -1;
} else if (s_bytes != buf_len) {
printk("send part of the message: %zd/%zu", s_bytes, sizeof(server));
return -1;
}
r_bytes = recv(sock[0], sock_buf, buf_len, 0);
if (r_bytes < 0) {
if (errno != EAGAIN)
pr_err("recv()");
return -1;
} else if (r_bytes == 0) { /* EOF */
printk("EOF on reply to ping");
return -1;
} else if (r_bytes != buf_len || memcmp(buf, sock_buf, buf_len)) {
printk("ping reply packet is corrupted %zd/%zu", r_bytes, buf_len);
return -1;
}
return 0;
}
static int udp_ping_reply(int sock[2], in_addr_t dest_ip, unsigned int port,
char *buf, size_t buf_len)
{
struct sockaddr_in server;
const struct sockaddr *dest_addr = (struct sockaddr *)&server;
char *sock_buf[buf_len];
ssize_t r_bytes, s_bytes;
server.sin_family = AF_INET;
server.sin_port = htons(port);
server.sin_addr.s_addr = dest_ip;
r_bytes = recv(sock[0], sock_buf, buf_len, 0);
if (r_bytes < 0) {
if (errno != EAGAIN)
pr_err("recv()");
return -1;
}
if (r_bytes == 0) { /* EOF */
printk("EOF on reply to ping");
return -1;
}
if (r_bytes != buf_len || memcmp(buf, sock_buf, buf_len)) {
printk("ping reply packet is corrupted %zd/%zu", r_bytes, buf_len);
return -1;
}
s_bytes = sendto(sock[1], buf, buf_len, 0, dest_addr, sizeof(server));
if (s_bytes < 0) {
pr_err("sendto()");
return -1;
} else if (s_bytes != buf_len) {
printk("send part of the message: %zd/%zu", s_bytes, sizeof(server));
return -1;
}
return 0;
}
typedef int (*ping_f)(int sock[2], in_addr_t dest_ip, unsigned int port,
char *buf, size_t buf_len);
static int do_ping(int cmd_fd, char *buf, size_t buf_len, struct in_addr from,
bool init_side, int d_port, in_addr_t to, ping_f func)
{
struct test_desc msg;
unsigned int s_port, i, ping_succeeded = 0;
int ping_sock[2];
char to_str[IPV4_STR_SZ] = {}, from_str[IPV4_STR_SZ] = {};
if (udp_ping_init(from, ping_timeout, &s_port, ping_sock)) {
printk("Failed to init ping");
return -1;
}
memset(&msg, 0, sizeof(msg));
msg.type = MSG_PING;
msg.body.ping.port = s_port;
memcpy(&msg.body.ping.reply_ip, &from, sizeof(from));
write_msg(cmd_fd, &msg, 0);
if (init_side) {
/* The other end sends ip to ping */
read_msg(cmd_fd, &msg, 0);
if (msg.type != MSG_PING)
return -1;
to = msg.body.ping.reply_ip;
d_port = msg.body.ping.port;
}
for (i = 0; i < ping_count ; i++) {
struct timespec sleep_time = {
.tv_sec = 0,
.tv_nsec = ping_delay_nsec,
};
ping_succeeded += !func(ping_sock, to, d_port, buf, page_size);
nanosleep(&sleep_time, 0);
}
close(ping_sock[0]);
close(ping_sock[1]);
strncpy(to_str, inet_ntoa(*(struct in_addr *)&to), IPV4_STR_SZ - 1);
strncpy(from_str, inet_ntoa(from), IPV4_STR_SZ - 1);
if (ping_succeeded < ping_success) {
printk("ping (%s) %s->%s failed %u/%u times",
init_side ? "send" : "reply", from_str, to_str,
ping_count - ping_succeeded, ping_count);
return -1;
}
#ifdef DEBUG
printk("ping (%s) %s->%s succeeded %u/%u times",
init_side ? "send" : "reply", from_str, to_str,
ping_succeeded, ping_count);
#endif
return 0;
}
static int xfrm_fill_key(char *name, char *buf,
size_t buf_len, unsigned int *key_len)
{
int i;
for (i = 0; i < XFRM_ALGO_NR_KEYS; i++) {
if (strncmp(name, xfrm_key_entries[i].algo_name, ALGO_LEN) == 0)
*key_len = xfrm_key_entries[i].key_len;
}
if (*key_len > buf_len) {
printk("Can't pack a key - too big for buffer");
return -1;
}
randomize_buffer(buf, *key_len);
return 0;
}
static int xfrm_state_pack_algo(struct nlmsghdr *nh, size_t req_sz,
struct xfrm_desc *desc)
{
struct {
union {
struct xfrm_algo alg;
struct xfrm_algo_aead aead;
struct xfrm_algo_auth auth;
} u;
char buf[XFRM_ALGO_KEY_BUF_SIZE];
} alg = {};
size_t alen, elen, clen, aelen;
unsigned short type;
alen = strlen(desc->a_algo);
elen = strlen(desc->e_algo);
clen = strlen(desc->c_algo);
aelen = strlen(desc->ae_algo);
/* Verify desc */
switch (desc->proto) {
case IPPROTO_AH:
if (!alen || elen || clen || aelen) {
printk("BUG: buggy ah desc");
return -1;
}
strncpy(alg.u.alg.alg_name, desc->a_algo, ALGO_LEN - 1);
if (xfrm_fill_key(desc->a_algo, alg.u.alg.alg_key,
sizeof(alg.buf), &alg.u.alg.alg_key_len))
return -1;
type = XFRMA_ALG_AUTH;
break;
case IPPROTO_COMP:
if (!clen || elen || alen || aelen) {
printk("BUG: buggy comp desc");
return -1;
}
strncpy(alg.u.alg.alg_name, desc->c_algo, ALGO_LEN - 1);
if (xfrm_fill_key(desc->c_algo, alg.u.alg.alg_key,
sizeof(alg.buf), &alg.u.alg.alg_key_len))
return -1;
type = XFRMA_ALG_COMP;
break;
case IPPROTO_ESP:
if (!((alen && elen) ^ aelen) || clen) {
printk("BUG: buggy esp desc");
return -1;
}
if (aelen) {
alg.u.aead.alg_icv_len = desc->icv_len;
strncpy(alg.u.aead.alg_name, desc->ae_algo, ALGO_LEN - 1);
if (xfrm_fill_key(desc->ae_algo, alg.u.aead.alg_key,
sizeof(alg.buf), &alg.u.aead.alg_key_len))
return -1;
type = XFRMA_ALG_AEAD;
} else {
strncpy(alg.u.alg.alg_name, desc->e_algo, ALGO_LEN - 1);
type = XFRMA_ALG_CRYPT;
if (xfrm_fill_key(desc->e_algo, alg.u.alg.alg_key,
sizeof(alg.buf), &alg.u.alg.alg_key_len))
return -1;
if (rtattr_pack(nh, req_sz, type, &alg, sizeof(alg)))
return -1;
strncpy(alg.u.alg.alg_name, desc->a_algo, ALGO_LEN);
type = XFRMA_ALG_AUTH;
if (xfrm_fill_key(desc->a_algo, alg.u.alg.alg_key,
sizeof(alg.buf), &alg.u.alg.alg_key_len))
return -1;
}
break;
default:
printk("BUG: unknown proto in desc");
return -1;
}
if (rtattr_pack(nh, req_sz, type, &alg, sizeof(alg)))
return -1;
return 0;
}
static inline uint32_t gen_spi(struct in_addr src)
{
return htonl(inet_lnaof(src));
}
static int xfrm_state_add(int xfrm_sock, uint32_t seq, uint32_t spi,
struct in_addr src, struct in_addr dst,
struct xfrm_desc *desc)
{
struct {
struct nlmsghdr nh;
struct xfrm_usersa_info info;
char attrbuf[MAX_PAYLOAD];
} req;
memset(&req, 0, sizeof(req));
req.nh.nlmsg_len = NLMSG_LENGTH(sizeof(req.info));
req.nh.nlmsg_type = XFRM_MSG_NEWSA;
req.nh.nlmsg_flags = NLM_F_REQUEST | NLM_F_ACK;
req.nh.nlmsg_seq = seq;
/* Fill selector. */
memcpy(&req.info.sel.daddr, &dst, sizeof(dst));
memcpy(&req.info.sel.saddr, &src, sizeof(src));
req.info.sel.family = AF_INET;
req.info.sel.prefixlen_d = PREFIX_LEN;
req.info.sel.prefixlen_s = PREFIX_LEN;
/* Fill id */
memcpy(&req.info.id.daddr, &dst, sizeof(dst));
/* Note: zero-spi cannot be deleted */
req.info.id.spi = spi;
req.info.id.proto = desc->proto;
memcpy(&req.info.saddr, &src, sizeof(src));
/* Fill lifteme_cfg */
req.info.lft.soft_byte_limit = XFRM_INF;
req.info.lft.hard_byte_limit = XFRM_INF;
req.info.lft.soft_packet_limit = XFRM_INF;
req.info.lft.hard_packet_limit = XFRM_INF;
req.info.family = AF_INET;
req.info.mode = XFRM_MODE_TUNNEL;
if (xfrm_state_pack_algo(&req.nh, sizeof(req), desc))
return -1;
if (send(xfrm_sock, &req, req.nh.nlmsg_len, 0) < 0) {
pr_err("send()");
return -1;
}
return netlink_check_answer(xfrm_sock);
}
static bool xfrm_usersa_found(struct xfrm_usersa_info *info, uint32_t spi,
struct in_addr src, struct in_addr dst,
struct xfrm_desc *desc)
{
if (memcmp(&info->sel.daddr, &dst, sizeof(dst)))
return false;
if (memcmp(&info->sel.saddr, &src, sizeof(src)))
return false;
if (info->sel.family != AF_INET ||
info->sel.prefixlen_d != PREFIX_LEN ||
info->sel.prefixlen_s != PREFIX_LEN)
return false;
if (info->id.spi != spi || info->id.proto != desc->proto)
return false;
if (memcmp(&info->id.daddr, &dst, sizeof(dst)))
return false;
if (memcmp(&info->saddr, &src, sizeof(src)))
return false;
if (info->lft.soft_byte_limit != XFRM_INF ||
info->lft.hard_byte_limit != XFRM_INF ||
info->lft.soft_packet_limit != XFRM_INF ||
info->lft.hard_packet_limit != XFRM_INF)
return false;
if (info->family != AF_INET || info->mode != XFRM_MODE_TUNNEL)
return false;
/* XXX: check xfrm algo, see xfrm_state_pack_algo(). */
return true;
}
static int xfrm_state_check(int xfrm_sock, uint32_t seq, uint32_t spi,
struct in_addr src, struct in_addr dst,
struct xfrm_desc *desc)
{
struct {
struct nlmsghdr nh;
char attrbuf[MAX_PAYLOAD];
} req;
struct {
struct nlmsghdr nh;
union {
struct xfrm_usersa_info info;
int error;
};
char attrbuf[MAX_PAYLOAD];
} answer;
struct xfrm_address_filter filter = {};
bool found = false;
memset(&req, 0, sizeof(req));
req.nh.nlmsg_len = NLMSG_LENGTH(0);
req.nh.nlmsg_type = XFRM_MSG_GETSA;
req.nh.nlmsg_flags = NLM_F_REQUEST | NLM_F_DUMP;
req.nh.nlmsg_seq = seq;
/*
* Add dump filter by source address as there may be other tunnels
* in this netns (if tests run in parallel).
*/
filter.family = AF_INET;
filter.splen = 0x1f; /* 0xffffffff mask see addr_match() */
memcpy(&filter.saddr, &src, sizeof(src));
if (rtattr_pack(&req.nh, sizeof(req), XFRMA_ADDRESS_FILTER,
&filter, sizeof(filter)))
return -1;
if (send(xfrm_sock, &req, req.nh.nlmsg_len, 0) < 0) {
pr_err("send()");
return -1;
}
while (1) {
if (recv(xfrm_sock, &answer, sizeof(answer), 0) < 0) {
pr_err("recv()");
return -1;
}
if (answer.nh.nlmsg_type == NLMSG_ERROR) {
printk("NLMSG_ERROR: %d: %s",
answer.error, strerror(-answer.error));
return -1;
} else if (answer.nh.nlmsg_type == NLMSG_DONE) {
if (found)
return 0;
printk("didn't find allocated xfrm state in dump");
return -1;
} else if (answer.nh.nlmsg_type == XFRM_MSG_NEWSA) {
if (xfrm_usersa_found(&answer.info, spi, src, dst, desc))
found = true;
}
}
}
static int xfrm_set(int xfrm_sock, uint32_t *seq,
struct in_addr src, struct in_addr dst,
struct in_addr tunsrc, struct in_addr tundst,
struct xfrm_desc *desc)
{
int err;
err = xfrm_state_add(xfrm_sock, (*seq)++, gen_spi(src), src, dst, desc);
if (err) {
printk("Failed to add xfrm state");
return -1;
}
err = xfrm_state_add(xfrm_sock, (*seq)++, gen_spi(src), dst, src, desc);
if (err) {
printk("Failed to add xfrm state");
return -1;
}
/* Check dumps for XFRM_MSG_GETSA */
err = xfrm_state_check(xfrm_sock, (*seq)++, gen_spi(src), src, dst, desc);
err |= xfrm_state_check(xfrm_sock, (*seq)++, gen_spi(src), dst, src, desc);
if (err) {
printk("Failed to check xfrm state");
return -1;
}
return 0;
}
static int xfrm_policy_add(int xfrm_sock, uint32_t seq, uint32_t spi,
struct in_addr src, struct in_addr dst, uint8_t dir,
struct in_addr tunsrc, struct in_addr tundst, uint8_t proto)
{
struct {
struct nlmsghdr nh;
struct xfrm_userpolicy_info info;
char attrbuf[MAX_PAYLOAD];
} req;
struct xfrm_user_tmpl tmpl;
memset(&req, 0, sizeof(req));
memset(&tmpl, 0, sizeof(tmpl));
req.nh.nlmsg_len = NLMSG_LENGTH(sizeof(req.info));
req.nh.nlmsg_type = XFRM_MSG_NEWPOLICY;
req.nh.nlmsg_flags = NLM_F_REQUEST | NLM_F_ACK;
req.nh.nlmsg_seq = seq;
/* Fill selector. */
memcpy(&req.info.sel.daddr, &dst, sizeof(tundst));
memcpy(&req.info.sel.saddr, &src, sizeof(tunsrc));
req.info.sel.family = AF_INET;
req.info.sel.prefixlen_d = PREFIX_LEN;
req.info.sel.prefixlen_s = PREFIX_LEN;
/* Fill lifteme_cfg */
req.info.lft.soft_byte_limit = XFRM_INF;
req.info.lft.hard_byte_limit = XFRM_INF;
req.info.lft.soft_packet_limit = XFRM_INF;
req.info.lft.hard_packet_limit = XFRM_INF;
req.info.dir = dir;
/* Fill tmpl */
memcpy(&tmpl.id.daddr, &dst, sizeof(dst));
/* Note: zero-spi cannot be deleted */
tmpl.id.spi = spi;
tmpl.id.proto = proto;
tmpl.family = AF_INET;
memcpy(&tmpl.saddr, &src, sizeof(src));
tmpl.mode = XFRM_MODE_TUNNEL;
tmpl.aalgos = (~(uint32_t)0);
tmpl.ealgos = (~(uint32_t)0);
tmpl.calgos = (~(uint32_t)0);
if (rtattr_pack(&req.nh, sizeof(req), XFRMA_TMPL, &tmpl, sizeof(tmpl)))
return -1;
if (send(xfrm_sock, &req, req.nh.nlmsg_len, 0) < 0) {
pr_err("send()");
return -1;
}
return netlink_check_answer(xfrm_sock);
}
static int xfrm_prepare(int xfrm_sock, uint32_t *seq,
struct in_addr src, struct in_addr dst,
struct in_addr tunsrc, struct in_addr tundst, uint8_t proto)
{
if (xfrm_policy_add(xfrm_sock, (*seq)++, gen_spi(src), src, dst,
XFRM_POLICY_OUT, tunsrc, tundst, proto)) {
printk("Failed to add xfrm policy");
return -1;
}
if (xfrm_policy_add(xfrm_sock, (*seq)++, gen_spi(src), dst, src,
XFRM_POLICY_IN, tunsrc, tundst, proto)) {
printk("Failed to add xfrm policy");
return -1;
}
return 0;
}
static int xfrm_policy_del(int xfrm_sock, uint32_t seq,
struct in_addr src, struct in_addr dst, uint8_t dir,
struct in_addr tunsrc, struct in_addr tundst)
{
struct {
struct nlmsghdr nh;
struct xfrm_userpolicy_id id;
char attrbuf[MAX_PAYLOAD];
} req;
memset(&req, 0, sizeof(req));
req.nh.nlmsg_len = NLMSG_LENGTH(sizeof(req.id));
req.nh.nlmsg_type = XFRM_MSG_DELPOLICY;
req.nh.nlmsg_flags = NLM_F_REQUEST | NLM_F_ACK;
req.nh.nlmsg_seq = seq;
/* Fill id */
memcpy(&req.id.sel.daddr, &dst, sizeof(tundst));
memcpy(&req.id.sel.saddr, &src, sizeof(tunsrc));
req.id.sel.family = AF_INET;
req.id.sel.prefixlen_d = PREFIX_LEN;
req.id.sel.prefixlen_s = PREFIX_LEN;
req.id.dir = dir;
if (send(xfrm_sock, &req, req.nh.nlmsg_len, 0) < 0) {
pr_err("send()");
return -1;
}
return netlink_check_answer(xfrm_sock);
}
static int xfrm_cleanup(int xfrm_sock, uint32_t *seq,
struct in_addr src, struct in_addr dst,
struct in_addr tunsrc, struct in_addr tundst)
{
if (xfrm_policy_del(xfrm_sock, (*seq)++, src, dst,
XFRM_POLICY_OUT, tunsrc, tundst)) {
printk("Failed to add xfrm policy");
return -1;
}
if (xfrm_policy_del(xfrm_sock, (*seq)++, dst, src,
XFRM_POLICY_IN, tunsrc, tundst)) {
printk("Failed to add xfrm policy");
return -1;
}
return 0;
}
static int xfrm_state_del(int xfrm_sock, uint32_t seq, uint32_t spi,
struct in_addr src, struct in_addr dst, uint8_t proto)
{
struct {
struct nlmsghdr nh;
struct xfrm_usersa_id id;
char attrbuf[MAX_PAYLOAD];
} req;
xfrm_address_t saddr = {};
memset(&req, 0, sizeof(req));
req.nh.nlmsg_len = NLMSG_LENGTH(sizeof(req.id));
req.nh.nlmsg_type = XFRM_MSG_DELSA;
req.nh.nlmsg_flags = NLM_F_REQUEST | NLM_F_ACK;
req.nh.nlmsg_seq = seq;
memcpy(&req.id.daddr, &dst, sizeof(dst));
req.id.family = AF_INET;
req.id.proto = proto;
/* Note: zero-spi cannot be deleted */
req.id.spi = spi;
memcpy(&saddr, &src, sizeof(src));
if (rtattr_pack(&req.nh, sizeof(req), XFRMA_SRCADDR, &saddr, sizeof(saddr)))
return -1;
if (send(xfrm_sock, &req, req.nh.nlmsg_len, 0) < 0) {
pr_err("send()");
return -1;
}
return netlink_check_answer(xfrm_sock);
}
static int xfrm_delete(int xfrm_sock, uint32_t *seq,
struct in_addr src, struct in_addr dst,
struct in_addr tunsrc, struct in_addr tundst, uint8_t proto)
{
if (xfrm_state_del(xfrm_sock, (*seq)++, gen_spi(src), src, dst, proto)) {
printk("Failed to remove xfrm state");
return -1;
}
if (xfrm_state_del(xfrm_sock, (*seq)++, gen_spi(src), dst, src, proto)) {
printk("Failed to remove xfrm state");
return -1;
}
return 0;
}
static int xfrm_state_allocspi(int xfrm_sock, uint32_t *seq,
uint32_t spi, uint8_t proto)
{
struct {
struct nlmsghdr nh;
struct xfrm_userspi_info spi;
} req;
struct {
struct nlmsghdr nh;
union {
struct xfrm_usersa_info info;
int error;
};
} answer;
memset(&req, 0, sizeof(req));
req.nh.nlmsg_len = NLMSG_LENGTH(sizeof(req.spi));
req.nh.nlmsg_type = XFRM_MSG_ALLOCSPI;
req.nh.nlmsg_flags = NLM_F_REQUEST;
req.nh.nlmsg_seq = (*seq)++;
req.spi.info.family = AF_INET;
req.spi.min = spi;
req.spi.max = spi;
req.spi.info.id.proto = proto;
if (send(xfrm_sock, &req, req.nh.nlmsg_len, 0) < 0) {
pr_err("send()");
return KSFT_FAIL;
}
if (recv(xfrm_sock, &answer, sizeof(answer), 0) < 0) {
pr_err("recv()");
return KSFT_FAIL;
} else if (answer.nh.nlmsg_type == XFRM_MSG_NEWSA) {
uint32_t new_spi = htonl(answer.info.id.spi);
if (new_spi != spi) {
printk("allocated spi is different from requested: %#x != %#x",
new_spi, spi);
return KSFT_FAIL;
}
return KSFT_PASS;
} else if (answer.nh.nlmsg_type != NLMSG_ERROR) {
printk("expected NLMSG_ERROR, got %d", (int)answer.nh.nlmsg_type);
return KSFT_FAIL;
}
printk("NLMSG_ERROR: %d: %s", answer.error, strerror(-answer.error));
return (answer.error) ? KSFT_FAIL : KSFT_PASS;
}
static int netlink_sock_bind(int *sock, uint32_t *seq, int proto, uint32_t groups)
{
struct sockaddr_nl snl = {};
socklen_t addr_len;
int ret = -1;
snl.nl_family = AF_NETLINK;
snl.nl_groups = groups;
if (netlink_sock(sock, seq, proto)) {
printk("Failed to open xfrm netlink socket");
return -1;
}
if (bind(*sock, (struct sockaddr *)&snl, sizeof(snl)) < 0) {
pr_err("bind()");
goto out_close;
}
addr_len = sizeof(snl);
if (getsockname(*sock, (struct sockaddr *)&snl, &addr_len) < 0) {
pr_err("getsockname()");
goto out_close;
}
if (addr_len != sizeof(snl)) {
printk("Wrong address length %d", addr_len);
goto out_close;
}
if (snl.nl_family != AF_NETLINK) {
printk("Wrong address family %d", snl.nl_family);
goto out_close;
}
return 0;
out_close:
close(*sock);
return ret;
}
static int xfrm_monitor_acquire(int xfrm_sock, uint32_t *seq, unsigned int nr)
{
struct {
struct nlmsghdr nh;
union {
struct xfrm_user_acquire acq;
int error;
};
char attrbuf[MAX_PAYLOAD];
} req;
struct xfrm_user_tmpl xfrm_tmpl = {};
int xfrm_listen = -1, ret = KSFT_FAIL;
uint32_t seq_listen;
if (netlink_sock_bind(&xfrm_listen, &seq_listen, NETLINK_XFRM, XFRMNLGRP_ACQUIRE))
return KSFT_FAIL;
memset(&req, 0, sizeof(req));
req.nh.nlmsg_len = NLMSG_LENGTH(sizeof(req.acq));
req.nh.nlmsg_type = XFRM_MSG_ACQUIRE;
req.nh.nlmsg_flags = NLM_F_REQUEST | NLM_F_ACK;
req.nh.nlmsg_seq = (*seq)++;
req.acq.policy.sel.family = AF_INET;
req.acq.aalgos = 0xfeed;
req.acq.ealgos = 0xbaad;
req.acq.calgos = 0xbabe;
xfrm_tmpl.family = AF_INET;
xfrm_tmpl.id.proto = IPPROTO_ESP;
if (rtattr_pack(&req.nh, sizeof(req), XFRMA_TMPL, &xfrm_tmpl, sizeof(xfrm_tmpl)))
goto out_close;
if (send(xfrm_sock, &req, req.nh.nlmsg_len, 0) < 0) {
pr_err("send()");
goto out_close;
}
if (recv(xfrm_sock, &req, sizeof(req), 0) < 0) {
pr_err("recv()");
goto out_close;
} else if (req.nh.nlmsg_type != NLMSG_ERROR) {
printk("expected NLMSG_ERROR, got %d", (int)req.nh.nlmsg_type);
goto out_close;
}
if (req.error) {
printk("NLMSG_ERROR: %d: %s", req.error, strerror(-req.error));
ret = req.error;
goto out_close;
}
if (recv(xfrm_listen, &req, sizeof(req), 0) < 0) {
pr_err("recv()");
goto out_close;
}
if (req.acq.aalgos != 0xfeed || req.acq.ealgos != 0xbaad
|| req.acq.calgos != 0xbabe) {
printk("xfrm_user_acquire has changed %x %x %x",
req.acq.aalgos, req.acq.ealgos, req.acq.calgos);
goto out_close;
}
ret = KSFT_PASS;
out_close:
close(xfrm_listen);
return ret;
}
static int xfrm_expire_state(int xfrm_sock, uint32_t *seq,
unsigned int nr, struct xfrm_desc *desc)
{
struct {
struct nlmsghdr nh;
union {
struct xfrm_user_expire expire;
int error;
};
} req;
struct in_addr src, dst;
int xfrm_listen = -1, ret = KSFT_FAIL;
uint32_t seq_listen;
src = inet_makeaddr(INADDR_B, child_ip(nr));
dst = inet_makeaddr(INADDR_B, grchild_ip(nr));
if (xfrm_state_add(xfrm_sock, (*seq)++, gen_spi(src), src, dst, desc)) {
printk("Failed to add xfrm state");
return KSFT_FAIL;
}
if (netlink_sock_bind(&xfrm_listen, &seq_listen, NETLINK_XFRM, XFRMNLGRP_EXPIRE))
return KSFT_FAIL;
memset(&req, 0, sizeof(req));
req.nh.nlmsg_len = NLMSG_LENGTH(sizeof(req.expire));
req.nh.nlmsg_type = XFRM_MSG_EXPIRE;
req.nh.nlmsg_flags = NLM_F_REQUEST | NLM_F_ACK;
req.nh.nlmsg_seq = (*seq)++;
memcpy(&req.expire.state.id.daddr, &dst, sizeof(dst));
req.expire.state.id.spi = gen_spi(src);
req.expire.state.id.proto = desc->proto;
req.expire.state.family = AF_INET;
req.expire.hard = 0xff;
if (send(xfrm_sock, &req, req.nh.nlmsg_len, 0) < 0) {
pr_err("send()");
goto out_close;
}
if (recv(xfrm_sock, &req, sizeof(req), 0) < 0) {
pr_err("recv()");
goto out_close;
} else if (req.nh.nlmsg_type != NLMSG_ERROR) {
printk("expected NLMSG_ERROR, got %d", (int)req.nh.nlmsg_type);
goto out_close;
}
if (req.error) {
printk("NLMSG_ERROR: %d: %s", req.error, strerror(-req.error));
ret = req.error;
goto out_close;
}
if (recv(xfrm_listen, &req, sizeof(req), 0) < 0) {
pr_err("recv()");
goto out_close;
}
if (req.expire.hard != 0x1) {
printk("expire.hard is not set: %x", req.expire.hard);
goto out_close;
}
ret = KSFT_PASS;
out_close:
close(xfrm_listen);
return ret;
}
static int xfrm_expire_policy(int xfrm_sock, uint32_t *seq,
unsigned int nr, struct xfrm_desc *desc)
{
struct {
struct nlmsghdr nh;
union {
struct xfrm_user_polexpire expire;
int error;
};
} req;
struct in_addr src, dst, tunsrc, tundst;
int xfrm_listen = -1, ret = KSFT_FAIL;
uint32_t seq_listen;
src = inet_makeaddr(INADDR_B, child_ip(nr));
dst = inet_makeaddr(INADDR_B, grchild_ip(nr));
tunsrc = inet_makeaddr(INADDR_A, child_ip(nr));
tundst = inet_makeaddr(INADDR_A, grchild_ip(nr));
if (xfrm_policy_add(xfrm_sock, (*seq)++, gen_spi(src), src, dst,
XFRM_POLICY_OUT, tunsrc, tundst, desc->proto)) {
printk("Failed to add xfrm policy");
return KSFT_FAIL;
}
if (netlink_sock_bind(&xfrm_listen, &seq_listen, NETLINK_XFRM, XFRMNLGRP_EXPIRE))
return KSFT_FAIL;
memset(&req, 0, sizeof(req));
req.nh.nlmsg_len = NLMSG_LENGTH(sizeof(req.expire));
req.nh.nlmsg_type = XFRM_MSG_POLEXPIRE;
req.nh.nlmsg_flags = NLM_F_REQUEST | NLM_F_ACK;
req.nh.nlmsg_seq = (*seq)++;
/* Fill selector. */
memcpy(&req.expire.pol.sel.daddr, &dst, sizeof(tundst));
memcpy(&req.expire.pol.sel.saddr, &src, sizeof(tunsrc));
req.expire.pol.sel.family = AF_INET;
req.expire.pol.sel.prefixlen_d = PREFIX_LEN;
req.expire.pol.sel.prefixlen_s = PREFIX_LEN;
req.expire.pol.dir = XFRM_POLICY_OUT;
req.expire.hard = 0xff;
if (send(xfrm_sock, &req, req.nh.nlmsg_len, 0) < 0) {
pr_err("send()");
goto out_close;
}
if (recv(xfrm_sock, &req, sizeof(req), 0) < 0) {
pr_err("recv()");
goto out_close;
} else if (req.nh.nlmsg_type != NLMSG_ERROR) {
printk("expected NLMSG_ERROR, got %d", (int)req.nh.nlmsg_type);
goto out_close;
}
if (req.error) {
printk("NLMSG_ERROR: %d: %s", req.error, strerror(-req.error));
ret = req.error;
goto out_close;
}
if (recv(xfrm_listen, &req, sizeof(req), 0) < 0) {
pr_err("recv()");
goto out_close;
}
if (req.expire.hard != 0x1) {
printk("expire.hard is not set: %x", req.expire.hard);
goto out_close;
}
ret = KSFT_PASS;
out_close:
close(xfrm_listen);
return ret;
}
static int xfrm_spdinfo_set_thresh(int xfrm_sock, uint32_t *seq,
unsigned thresh4_l, unsigned thresh4_r,
unsigned thresh6_l, unsigned thresh6_r,
bool add_bad_attr)
{
struct {
struct nlmsghdr nh;
union {
uint32_t unused;
int error;
};
char attrbuf[MAX_PAYLOAD];
} req;
struct xfrmu_spdhthresh thresh;
memset(&req, 0, sizeof(req));
req.nh.nlmsg_len = NLMSG_LENGTH(sizeof(req.unused));
req.nh.nlmsg_type = XFRM_MSG_NEWSPDINFO;
req.nh.nlmsg_flags = NLM_F_REQUEST | NLM_F_ACK;
req.nh.nlmsg_seq = (*seq)++;
thresh.lbits = thresh4_l;
thresh.rbits = thresh4_r;
if (rtattr_pack(&req.nh, sizeof(req), XFRMA_SPD_IPV4_HTHRESH, &thresh, sizeof(thresh)))
return -1;
thresh.lbits = thresh6_l;
thresh.rbits = thresh6_r;
if (rtattr_pack(&req.nh, sizeof(req), XFRMA_SPD_IPV6_HTHRESH, &thresh, sizeof(thresh)))
return -1;
if (add_bad_attr) {
BUILD_BUG_ON(XFRMA_IF_ID <= XFRMA_SPD_MAX + 1);
if (rtattr_pack(&req.nh, sizeof(req), XFRMA_IF_ID, NULL, 0)) {
pr_err("adding attribute failed: no space");
return -1;
}
}
if (send(xfrm_sock, &req, req.nh.nlmsg_len, 0) < 0) {
pr_err("send()");
return -1;
}
if (recv(xfrm_sock, &req, sizeof(req), 0) < 0) {
pr_err("recv()");
return -1;
} else if (req.nh.nlmsg_type != NLMSG_ERROR) {
printk("expected NLMSG_ERROR, got %d", (int)req.nh.nlmsg_type);
return -1;
}
if (req.error) {
printk("NLMSG_ERROR: %d: %s", req.error, strerror(-req.error));
return -1;
}
return 0;
}
static int xfrm_spdinfo_attrs(int xfrm_sock, uint32_t *seq)
{
struct {
struct nlmsghdr nh;
union {
uint32_t unused;
int error;
};
char attrbuf[MAX_PAYLOAD];
} req;
if (xfrm_spdinfo_set_thresh(xfrm_sock, seq, 32, 31, 120, 16, false)) {
pr_err("Can't set SPD HTHRESH");
return KSFT_FAIL;
}
memset(&req, 0, sizeof(req));
req.nh.nlmsg_len = NLMSG_LENGTH(sizeof(req.unused));
req.nh.nlmsg_type = XFRM_MSG_GETSPDINFO;
req.nh.nlmsg_flags = NLM_F_REQUEST;
req.nh.nlmsg_seq = (*seq)++;
if (send(xfrm_sock, &req, req.nh.nlmsg_len, 0) < 0) {
pr_err("send()");
return KSFT_FAIL;
}
if (recv(xfrm_sock, &req, sizeof(req), 0) < 0) {
pr_err("recv()");
return KSFT_FAIL;
} else if (req.nh.nlmsg_type == XFRM_MSG_NEWSPDINFO) {
size_t len = NLMSG_PAYLOAD(&req.nh, sizeof(req.unused));
struct rtattr *attr = (void *)req.attrbuf;
int got_thresh = 0;
for (; RTA_OK(attr, len); attr = RTA_NEXT(attr, len)) {
if (attr->rta_type == XFRMA_SPD_IPV4_HTHRESH) {
struct xfrmu_spdhthresh *t = RTA_DATA(attr);
got_thresh++;
if (t->lbits != 32 || t->rbits != 31) {
pr_err("thresh differ: %u, %u",
t->lbits, t->rbits);
return KSFT_FAIL;
}
}
if (attr->rta_type == XFRMA_SPD_IPV6_HTHRESH) {
struct xfrmu_spdhthresh *t = RTA_DATA(attr);
got_thresh++;
if (t->lbits != 120 || t->rbits != 16) {
pr_err("thresh differ: %u, %u",
t->lbits, t->rbits);
return KSFT_FAIL;
}
}
}
if (got_thresh != 2) {
pr_err("only %d thresh returned by XFRM_MSG_GETSPDINFO", got_thresh);
return KSFT_FAIL;
}
} else if (req.nh.nlmsg_type != NLMSG_ERROR) {
printk("expected NLMSG_ERROR, got %d", (int)req.nh.nlmsg_type);
return KSFT_FAIL;
} else {
printk("NLMSG_ERROR: %d: %s", req.error, strerror(-req.error));
return -1;
}
/* Restore the default */
if (xfrm_spdinfo_set_thresh(xfrm_sock, seq, 32, 32, 128, 128, false)) {
pr_err("Can't restore SPD HTHRESH");
return KSFT_FAIL;
}
/*
* At this moment xfrm uses nlmsg_parse_deprecated(), which
* implies NL_VALIDATE_LIBERAL - ignoring attributes with
* (type > maxtype). nla_parse_depricated_strict() would enforce
* it. Or even stricter nla_parse().
* Right now it's not expected to fail, but to be ignored.
*/
if (xfrm_spdinfo_set_thresh(xfrm_sock, seq, 32, 32, 128, 128, true))
return KSFT_PASS;
return KSFT_PASS;
}
static int child_serv(int xfrm_sock, uint32_t *seq,
unsigned int nr, int cmd_fd, void *buf, struct xfrm_desc *desc)
{
struct in_addr src, dst, tunsrc, tundst;
struct test_desc msg;
int ret = KSFT_FAIL;
src = inet_makeaddr(INADDR_B, child_ip(nr));
dst = inet_makeaddr(INADDR_B, grchild_ip(nr));
tunsrc = inet_makeaddr(INADDR_A, child_ip(nr));
tundst = inet_makeaddr(INADDR_A, grchild_ip(nr));
/* UDP pinging without xfrm */
if (do_ping(cmd_fd, buf, page_size, src, true, 0, 0, udp_ping_send)) {
printk("ping failed before setting xfrm");
return KSFT_FAIL;
}
memset(&msg, 0, sizeof(msg));
msg.type = MSG_XFRM_PREPARE;
memcpy(&msg.body.xfrm_desc, desc, sizeof(*desc));
write_msg(cmd_fd, &msg, 1);
if (xfrm_prepare(xfrm_sock, seq, src, dst, tunsrc, tundst, desc->proto)) {
printk("failed to prepare xfrm");
goto cleanup;
}
memset(&msg, 0, sizeof(msg));
msg.type = MSG_XFRM_ADD;
memcpy(&msg.body.xfrm_desc, desc, sizeof(*desc));
write_msg(cmd_fd, &msg, 1);
if (xfrm_set(xfrm_sock, seq, src, dst, tunsrc, tundst, desc)) {
printk("failed to set xfrm");
goto delete;
}
/* UDP pinging with xfrm tunnel */
if (do_ping(cmd_fd, buf, page_size, tunsrc,
true, 0, 0, udp_ping_send)) {
printk("ping failed for xfrm");
goto delete;
}
ret = KSFT_PASS;
delete:
/* xfrm delete */
memset(&msg, 0, sizeof(msg));
msg.type = MSG_XFRM_DEL;
memcpy(&msg.body.xfrm_desc, desc, sizeof(*desc));
write_msg(cmd_fd, &msg, 1);
if (xfrm_delete(xfrm_sock, seq, src, dst, tunsrc, tundst, desc->proto)) {
printk("failed ping to remove xfrm");
ret = KSFT_FAIL;
}
cleanup:
memset(&msg, 0, sizeof(msg));
msg.type = MSG_XFRM_CLEANUP;
memcpy(&msg.body.xfrm_desc, desc, sizeof(*desc));
write_msg(cmd_fd, &msg, 1);
if (xfrm_cleanup(xfrm_sock, seq, src, dst, tunsrc, tundst)) {
printk("failed ping to cleanup xfrm");
ret = KSFT_FAIL;
}
return ret;
}
static int child_f(unsigned int nr, int test_desc_fd, int cmd_fd, void *buf)
{
struct xfrm_desc desc;
struct test_desc msg;
int xfrm_sock = -1;
uint32_t seq;
if (switch_ns(nsfd_childa))
exit(KSFT_FAIL);
if (netlink_sock(&xfrm_sock, &seq, NETLINK_XFRM)) {
printk("Failed to open xfrm netlink socket");
exit(KSFT_FAIL);
}
/* Check that seq sock is ready, just for sure. */
memset(&msg, 0, sizeof(msg));
msg.type = MSG_ACK;
write_msg(cmd_fd, &msg, 1);
read_msg(cmd_fd, &msg, 1);
if (msg.type != MSG_ACK) {
printk("Ack failed");
exit(KSFT_FAIL);
}
for (;;) {
ssize_t received = read(test_desc_fd, &desc, sizeof(desc));
int ret;
if (received == 0) /* EOF */
break;
if (received != sizeof(desc)) {
pr_err("read() returned %zd", received);
exit(KSFT_FAIL);
}
switch (desc.type) {
case CREATE_TUNNEL:
ret = child_serv(xfrm_sock, &seq, nr,
cmd_fd, buf, &desc);
break;
case ALLOCATE_SPI:
ret = xfrm_state_allocspi(xfrm_sock, &seq,
-1, desc.proto);
break;
case MONITOR_ACQUIRE:
ret = xfrm_monitor_acquire(xfrm_sock, &seq, nr);
break;
case EXPIRE_STATE:
ret = xfrm_expire_state(xfrm_sock, &seq, nr, &desc);
break;
case EXPIRE_POLICY:
ret = xfrm_expire_policy(xfrm_sock, &seq, nr, &desc);
break;
case SPDINFO_ATTRS:
ret = xfrm_spdinfo_attrs(xfrm_sock, &seq);
break;
default:
printk("Unknown desc type %d", desc.type);
exit(KSFT_FAIL);
}
write_test_result(ret, &desc);
}
close(xfrm_sock);
msg.type = MSG_EXIT;
write_msg(cmd_fd, &msg, 1);
exit(KSFT_PASS);
}
static void grand_child_serv(unsigned int nr, int cmd_fd, void *buf,
struct test_desc *msg, int xfrm_sock, uint32_t *seq)
{
struct in_addr src, dst, tunsrc, tundst;
bool tun_reply;
struct xfrm_desc *desc = &msg->body.xfrm_desc;
src = inet_makeaddr(INADDR_B, grchild_ip(nr));
dst = inet_makeaddr(INADDR_B, child_ip(nr));
tunsrc = inet_makeaddr(INADDR_A, grchild_ip(nr));
tundst = inet_makeaddr(INADDR_A, child_ip(nr));
switch (msg->type) {
case MSG_EXIT:
exit(KSFT_PASS);
case MSG_ACK:
write_msg(cmd_fd, msg, 1);
break;
case MSG_PING:
tun_reply = memcmp(&dst, &msg->body.ping.reply_ip, sizeof(in_addr_t));
/* UDP pinging without xfrm */
if (do_ping(cmd_fd, buf, page_size, tun_reply ? tunsrc : src,
false, msg->body.ping.port,
msg->body.ping.reply_ip, udp_ping_reply)) {
printk("ping failed before setting xfrm");
}
break;
case MSG_XFRM_PREPARE:
if (xfrm_prepare(xfrm_sock, seq, src, dst, tunsrc, tundst,
desc->proto)) {
xfrm_cleanup(xfrm_sock, seq, src, dst, tunsrc, tundst);
printk("failed to prepare xfrm");
}
break;
case MSG_XFRM_ADD:
if (xfrm_set(xfrm_sock, seq, src, dst, tunsrc, tundst, desc)) {
xfrm_cleanup(xfrm_sock, seq, src, dst, tunsrc, tundst);
printk("failed to set xfrm");
}
break;
case MSG_XFRM_DEL:
if (xfrm_delete(xfrm_sock, seq, src, dst, tunsrc, tundst,
desc->proto)) {
xfrm_cleanup(xfrm_sock, seq, src, dst, tunsrc, tundst);
printk("failed to remove xfrm");
}
break;
case MSG_XFRM_CLEANUP:
if (xfrm_cleanup(xfrm_sock, seq, src, dst, tunsrc, tundst)) {
printk("failed to cleanup xfrm");
}
break;
default:
printk("got unknown msg type %d", msg->type);
}
}
static int grand_child_f(unsigned int nr, int cmd_fd, void *buf)
{
struct test_desc msg;
int xfrm_sock = -1;
uint32_t seq;
if (switch_ns(nsfd_childb))
exit(KSFT_FAIL);
if (netlink_sock(&xfrm_sock, &seq, NETLINK_XFRM)) {
printk("Failed to open xfrm netlink socket");
exit(KSFT_FAIL);
}
do {
read_msg(cmd_fd, &msg, 1);
grand_child_serv(nr, cmd_fd, buf, &msg, xfrm_sock, &seq);
} while (1);
close(xfrm_sock);
exit(KSFT_FAIL);
}
static int start_child(unsigned int nr, char *veth, int test_desc_fd[2])
{
int cmd_sock[2];
void *data_map;
pid_t child;
if (init_child(nsfd_childa, veth, child_ip(nr), grchild_ip(nr)))
return -1;
if (init_child(nsfd_childb, veth, grchild_ip(nr), child_ip(nr)))
return -1;
child = fork();
if (child < 0) {
pr_err("fork()");
return -1;
} else if (child) {
/* in parent - selftest */
return switch_ns(nsfd_parent);
}
if (close(test_desc_fd[1])) {
pr_err("close()");
return -1;
}
/* child */
data_map = mmap(0, page_size, PROT_READ | PROT_WRITE,
MAP_SHARED | MAP_ANONYMOUS, -1, 0);
if (data_map == MAP_FAILED) {
pr_err("mmap()");
return -1;
}
randomize_buffer(data_map, page_size);
if (socketpair(PF_LOCAL, SOCK_SEQPACKET, 0, cmd_sock)) {
pr_err("socketpair()");
return -1;
}
child = fork();
if (child < 0) {
pr_err("fork()");
return -1;
} else if (child) {
if (close(cmd_sock[0])) {
pr_err("close()");
return -1;
}
return child_f(nr, test_desc_fd[0], cmd_sock[1], data_map);
}
if (close(cmd_sock[1])) {
pr_err("close()");
return -1;
}
return grand_child_f(nr, cmd_sock[0], data_map);
}
static void exit_usage(char **argv)
{
printk("Usage: %s [nr_process]", argv[0]);
exit(KSFT_FAIL);
}
static int __write_desc(int test_desc_fd, struct xfrm_desc *desc)
{
ssize_t ret;
ret = write(test_desc_fd, desc, sizeof(*desc));
if (ret == sizeof(*desc))
return 0;
pr_err("Writing test's desc failed %ld", ret);
return -1;
}
static int write_desc(int proto, int test_desc_fd,
char *a, char *e, char *c, char *ae)
{
struct xfrm_desc desc = {};
desc.type = CREATE_TUNNEL;
desc.proto = proto;
if (a)
strncpy(desc.a_algo, a, ALGO_LEN - 1);
if (e)
strncpy(desc.e_algo, e, ALGO_LEN - 1);
if (c)
strncpy(desc.c_algo, c, ALGO_LEN - 1);
if (ae)
strncpy(desc.ae_algo, ae, ALGO_LEN - 1);
return __write_desc(test_desc_fd, &desc);
}
int proto_list[] = { IPPROTO_AH, IPPROTO_COMP, IPPROTO_ESP };
char *ah_list[] = {
"digest_null", "hmac(md5)", "hmac(sha1)", "hmac(sha256)",
"hmac(sha384)", "hmac(sha512)", "hmac(rmd160)",
"xcbc(aes)", "cmac(aes)"
};
char *comp_list[] = {
"deflate",
#if 0
/* No compression backend realization */
"lzs", "lzjh"
#endif
};
char *e_list[] = {
"ecb(cipher_null)", "cbc(des)", "cbc(des3_ede)", "cbc(cast5)",
"cbc(blowfish)", "cbc(aes)", "cbc(serpent)", "cbc(camellia)",
"cbc(twofish)", "rfc3686(ctr(aes))"
};
char *ae_list[] = {
#if 0
/* not implemented */
"rfc4106(gcm(aes))", "rfc4309(ccm(aes))", "rfc4543(gcm(aes))",
"rfc7539esp(chacha20,poly1305)"
#endif
};
const unsigned int proto_plan = ARRAY_SIZE(ah_list) + ARRAY_SIZE(comp_list) \
+ (ARRAY_SIZE(ah_list) * ARRAY_SIZE(e_list)) \
+ ARRAY_SIZE(ae_list);
static int write_proto_plan(int fd, int proto)
{
unsigned int i;
switch (proto) {
case IPPROTO_AH:
for (i = 0; i < ARRAY_SIZE(ah_list); i++) {
if (write_desc(proto, fd, ah_list[i], 0, 0, 0))
return -1;
}
break;
case IPPROTO_COMP:
for (i = 0; i < ARRAY_SIZE(comp_list); i++) {
if (write_desc(proto, fd, 0, 0, comp_list[i], 0))
return -1;
}
break;
case IPPROTO_ESP:
for (i = 0; i < ARRAY_SIZE(ah_list); i++) {
int j;
for (j = 0; j < ARRAY_SIZE(e_list); j++) {
if (write_desc(proto, fd, ah_list[i],
e_list[j], 0, 0))
return -1;
}
}
for (i = 0; i < ARRAY_SIZE(ae_list); i++) {
if (write_desc(proto, fd, 0, 0, 0, ae_list[i]))
return -1;
}
break;
default:
printk("BUG: Specified unknown proto %d", proto);
return -1;
}
return 0;
}
/*
* Some structures in xfrm uapi header differ in size between
* 64-bit and 32-bit ABI:
*
* 32-bit UABI | 64-bit UABI
* -------------------------------------|-------------------------------------
* sizeof(xfrm_usersa_info) = 220 | sizeof(xfrm_usersa_info) = 224
* sizeof(xfrm_userpolicy_info) = 164 | sizeof(xfrm_userpolicy_info) = 168
* sizeof(xfrm_userspi_info) = 228 | sizeof(xfrm_userspi_info) = 232
* sizeof(xfrm_user_acquire) = 276 | sizeof(xfrm_user_acquire) = 280
* sizeof(xfrm_user_expire) = 224 | sizeof(xfrm_user_expire) = 232
* sizeof(xfrm_user_polexpire) = 168 | sizeof(xfrm_user_polexpire) = 176
*
* Check the affected by the UABI difference structures.
* Also, check translation for xfrm_set_spdinfo: it has it's own attributes
* which needs to be correctly copied, but not translated.
*/
const unsigned int compat_plan = 5;
static int write_compat_struct_tests(int test_desc_fd)
{
struct xfrm_desc desc = {};
desc.type = ALLOCATE_SPI;
desc.proto = IPPROTO_AH;
strncpy(desc.a_algo, ah_list[0], ALGO_LEN - 1);
if (__write_desc(test_desc_fd, &desc))
return -1;
desc.type = MONITOR_ACQUIRE;
if (__write_desc(test_desc_fd, &desc))
return -1;
desc.type = EXPIRE_STATE;
if (__write_desc(test_desc_fd, &desc))
return -1;
desc.type = EXPIRE_POLICY;
if (__write_desc(test_desc_fd, &desc))
return -1;
desc.type = SPDINFO_ATTRS;
if (__write_desc(test_desc_fd, &desc))
return -1;
return 0;
}
static int write_test_plan(int test_desc_fd)
{
unsigned int i;
pid_t child;
child = fork();
if (child < 0) {
pr_err("fork()");
return -1;
}
if (child) {
if (close(test_desc_fd))
printk("close(): %m");
return 0;
}
if (write_compat_struct_tests(test_desc_fd))
exit(KSFT_FAIL);
for (i = 0; i < ARRAY_SIZE(proto_list); i++) {
if (write_proto_plan(test_desc_fd, proto_list[i]))
exit(KSFT_FAIL);
}
exit(KSFT_PASS);
}
static int children_cleanup(void)
{
unsigned ret = KSFT_PASS;
while (1) {
int status;
pid_t p = wait(&status);
if ((p < 0) && errno == ECHILD)
break;
if (p < 0) {
pr_err("wait()");
return KSFT_FAIL;
}
if (!WIFEXITED(status)) {
ret = KSFT_FAIL;
continue;
}
if (WEXITSTATUS(status) == KSFT_FAIL)
ret = KSFT_FAIL;
}
return ret;
}
typedef void (*print_res)(const char *, ...);
static int check_results(void)
{
struct test_result tr = {};
struct xfrm_desc *d = &tr.desc;
int ret = KSFT_PASS;
while (1) {
ssize_t received = read(results_fd[0], &tr, sizeof(tr));
print_res result;
if (received == 0) /* EOF */
break;
if (received != sizeof(tr)) {
pr_err("read() returned %zd", received);
return KSFT_FAIL;
}
switch (tr.res) {
case KSFT_PASS:
result = ksft_test_result_pass;
break;
case KSFT_FAIL:
default:
result = ksft_test_result_fail;
ret = KSFT_FAIL;
}
result(" %s: [%u, '%s', '%s', '%s', '%s', %u]\n",
desc_name[d->type], (unsigned int)d->proto, d->a_algo,
d->e_algo, d->c_algo, d->ae_algo, d->icv_len);
}
return ret;
}
int main(int argc, char **argv)
{
unsigned int nr_process = 1;
int route_sock = -1, ret = KSFT_SKIP;
int test_desc_fd[2];
uint32_t route_seq;
unsigned int i;
if (argc > 2)
exit_usage(argv);
if (argc > 1) {
char *endptr;
errno = 0;
nr_process = strtol(argv[1], &endptr, 10);
if ((errno == ERANGE && (nr_process == LONG_MAX || nr_process == LONG_MIN))
|| (errno != 0 && nr_process == 0)
|| (endptr == argv[1]) || (*endptr != '\0')) {
printk("Failed to parse [nr_process]");
exit_usage(argv);
}
if (nr_process > MAX_PROCESSES || !nr_process) {
printk("nr_process should be between [1; %u]",
MAX_PROCESSES);
exit_usage(argv);
}
}
srand(time(NULL));
page_size = sysconf(_SC_PAGESIZE);
if (page_size < 1)
ksft_exit_skip("sysconf(): %m\n");
if (pipe2(test_desc_fd, O_DIRECT) < 0)
ksft_exit_skip("pipe(): %m\n");
if (pipe2(results_fd, O_DIRECT) < 0)
ksft_exit_skip("pipe(): %m\n");
if (init_namespaces())
ksft_exit_skip("Failed to create namespaces\n");
if (netlink_sock(&route_sock, &route_seq, NETLINK_ROUTE))
ksft_exit_skip("Failed to open netlink route socket\n");
for (i = 0; i < nr_process; i++) {
char veth[VETH_LEN];
snprintf(veth, VETH_LEN, VETH_FMT, i);
if (veth_add(route_sock, route_seq++, veth, nsfd_childa, veth, nsfd_childb)) {
close(route_sock);
ksft_exit_fail_msg("Failed to create veth device");
}
if (start_child(i, veth, test_desc_fd)) {
close(route_sock);
ksft_exit_fail_msg("Child %u failed to start", i);
}
}
if (close(route_sock) || close(test_desc_fd[0]) || close(results_fd[1]))
ksft_exit_fail_msg("close(): %m");
ksft_set_plan(proto_plan + compat_plan);
if (write_test_plan(test_desc_fd[1]))
ksft_exit_fail_msg("Failed to write test plan to pipe");
ret = check_results();
if (children_cleanup() == KSFT_FAIL)
exit(KSFT_FAIL);
exit(ret);
}
| linux-master | tools/testing/selftests/net/ipsec.c |
// SPDX-License-Identifier: GPL-2.0
/* Copyright Amazon.com Inc. or its affiliates. */
#define _GNU_SOURCE
#include <sched.h>
#include <netinet/in.h>
#include <sys/socket.h>
#include <sys/sysinfo.h>
#include "../kselftest_harness.h"
#define CLIENT_PER_SERVER 32 /* More sockets, more reliable */
#define NR_SERVER self->nproc
#define NR_CLIENT (CLIENT_PER_SERVER * NR_SERVER)
FIXTURE(so_incoming_cpu)
{
int nproc;
int *servers;
union {
struct sockaddr addr;
struct sockaddr_in in_addr;
};
socklen_t addrlen;
};
enum when_to_set {
BEFORE_REUSEPORT,
BEFORE_LISTEN,
AFTER_LISTEN,
AFTER_ALL_LISTEN,
};
FIXTURE_VARIANT(so_incoming_cpu)
{
int when_to_set;
};
FIXTURE_VARIANT_ADD(so_incoming_cpu, before_reuseport)
{
.when_to_set = BEFORE_REUSEPORT,
};
FIXTURE_VARIANT_ADD(so_incoming_cpu, before_listen)
{
.when_to_set = BEFORE_LISTEN,
};
FIXTURE_VARIANT_ADD(so_incoming_cpu, after_listen)
{
.when_to_set = AFTER_LISTEN,
};
FIXTURE_VARIANT_ADD(so_incoming_cpu, after_all_listen)
{
.when_to_set = AFTER_ALL_LISTEN,
};
FIXTURE_SETUP(so_incoming_cpu)
{
self->nproc = get_nprocs();
ASSERT_LE(2, self->nproc);
self->servers = malloc(sizeof(int) * NR_SERVER);
ASSERT_NE(self->servers, NULL);
self->in_addr.sin_family = AF_INET;
self->in_addr.sin_addr.s_addr = htonl(INADDR_LOOPBACK);
self->in_addr.sin_port = htons(0);
self->addrlen = sizeof(struct sockaddr_in);
}
FIXTURE_TEARDOWN(so_incoming_cpu)
{
int i;
for (i = 0; i < NR_SERVER; i++)
close(self->servers[i]);
free(self->servers);
}
void set_so_incoming_cpu(struct __test_metadata *_metadata, int fd, int cpu)
{
int ret;
ret = setsockopt(fd, SOL_SOCKET, SO_INCOMING_CPU, &cpu, sizeof(int));
ASSERT_EQ(ret, 0);
}
int create_server(struct __test_metadata *_metadata,
FIXTURE_DATA(so_incoming_cpu) *self,
const FIXTURE_VARIANT(so_incoming_cpu) *variant,
int cpu)
{
int fd, ret;
fd = socket(AF_INET, SOCK_STREAM | SOCK_NONBLOCK, 0);
ASSERT_NE(fd, -1);
if (variant->when_to_set == BEFORE_REUSEPORT)
set_so_incoming_cpu(_metadata, fd, cpu);
ret = setsockopt(fd, SOL_SOCKET, SO_REUSEPORT, &(int){1}, sizeof(int));
ASSERT_EQ(ret, 0);
ret = bind(fd, &self->addr, self->addrlen);
ASSERT_EQ(ret, 0);
if (variant->when_to_set == BEFORE_LISTEN)
set_so_incoming_cpu(_metadata, fd, cpu);
/* We don't use CLIENT_PER_SERVER here not to block
* this test at connect() if SO_INCOMING_CPU is broken.
*/
ret = listen(fd, NR_CLIENT);
ASSERT_EQ(ret, 0);
if (variant->when_to_set == AFTER_LISTEN)
set_so_incoming_cpu(_metadata, fd, cpu);
return fd;
}
void create_servers(struct __test_metadata *_metadata,
FIXTURE_DATA(so_incoming_cpu) *self,
const FIXTURE_VARIANT(so_incoming_cpu) *variant)
{
int i, ret;
for (i = 0; i < NR_SERVER; i++) {
self->servers[i] = create_server(_metadata, self, variant, i);
if (i == 0) {
ret = getsockname(self->servers[i], &self->addr, &self->addrlen);
ASSERT_EQ(ret, 0);
}
}
if (variant->when_to_set == AFTER_ALL_LISTEN) {
for (i = 0; i < NR_SERVER; i++)
set_so_incoming_cpu(_metadata, self->servers[i], i);
}
}
void create_clients(struct __test_metadata *_metadata,
FIXTURE_DATA(so_incoming_cpu) *self)
{
cpu_set_t cpu_set;
int i, j, fd, ret;
for (i = 0; i < NR_SERVER; i++) {
CPU_ZERO(&cpu_set);
CPU_SET(i, &cpu_set);
ASSERT_EQ(CPU_COUNT(&cpu_set), 1);
ASSERT_NE(CPU_ISSET(i, &cpu_set), 0);
/* Make sure SYN will be processed on the i-th CPU
* and finally distributed to the i-th listener.
*/
ret = sched_setaffinity(0, sizeof(cpu_set), &cpu_set);
ASSERT_EQ(ret, 0);
for (j = 0; j < CLIENT_PER_SERVER; j++) {
fd = socket(AF_INET, SOCK_STREAM, 0);
ASSERT_NE(fd, -1);
ret = connect(fd, &self->addr, self->addrlen);
ASSERT_EQ(ret, 0);
close(fd);
}
}
}
void verify_incoming_cpu(struct __test_metadata *_metadata,
FIXTURE_DATA(so_incoming_cpu) *self)
{
int i, j, fd, cpu, ret, total = 0;
socklen_t len = sizeof(int);
for (i = 0; i < NR_SERVER; i++) {
for (j = 0; j < CLIENT_PER_SERVER; j++) {
/* If we see -EAGAIN here, SO_INCOMING_CPU is broken */
fd = accept(self->servers[i], &self->addr, &self->addrlen);
ASSERT_NE(fd, -1);
ret = getsockopt(fd, SOL_SOCKET, SO_INCOMING_CPU, &cpu, &len);
ASSERT_EQ(ret, 0);
ASSERT_EQ(cpu, i);
close(fd);
total++;
}
}
ASSERT_EQ(total, NR_CLIENT);
TH_LOG("SO_INCOMING_CPU is very likely to be "
"working correctly with %d sockets.", total);
}
TEST_F(so_incoming_cpu, test1)
{
create_servers(_metadata, self, variant);
create_clients(_metadata, self);
verify_incoming_cpu(_metadata, self);
}
TEST_F(so_incoming_cpu, test2)
{
int server;
create_servers(_metadata, self, variant);
/* No CPU specified */
server = create_server(_metadata, self, variant, -1);
close(server);
create_clients(_metadata, self);
verify_incoming_cpu(_metadata, self);
}
TEST_F(so_incoming_cpu, test3)
{
int server, client;
create_servers(_metadata, self, variant);
/* No CPU specified */
server = create_server(_metadata, self, variant, -1);
create_clients(_metadata, self);
/* Never receive any requests */
client = accept(server, &self->addr, &self->addrlen);
ASSERT_EQ(client, -1);
verify_incoming_cpu(_metadata, self);
}
TEST_HARNESS_MAIN
| linux-master | tools/testing/selftests/net/so_incoming_cpu.c |
// SPDX-License-Identifier: GPL-2.0
/* Test that sockets listening on a specific address are preferred
* over sockets listening on addr_any.
*/
#define _GNU_SOURCE
#include <arpa/inet.h>
#include <errno.h>
#include <error.h>
#include <linux/dccp.h>
#include <linux/in.h>
#include <linux/unistd.h>
#include <stdbool.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/epoll.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <unistd.h>
#ifndef SOL_DCCP
#define SOL_DCCP 269
#endif
static const char *IP4_ADDR = "127.0.0.1";
static const char *IP6_ADDR = "::1";
static const char *IP4_MAPPED6 = "::ffff:127.0.0.1";
static const int PORT = 8888;
static void build_rcv_fd(int family, int proto, int *rcv_fds, int count,
const char *addr_str)
{
struct sockaddr_in addr4 = {0};
struct sockaddr_in6 addr6 = {0};
struct sockaddr *addr;
int opt, i, sz;
memset(&addr, 0, sizeof(addr));
switch (family) {
case AF_INET:
addr4.sin_family = family;
if (!addr_str)
addr4.sin_addr.s_addr = htonl(INADDR_ANY);
else if (!inet_pton(family, addr_str, &addr4.sin_addr.s_addr))
error(1, errno, "inet_pton failed: %s", addr_str);
addr4.sin_port = htons(PORT);
sz = sizeof(addr4);
addr = (struct sockaddr *)&addr4;
break;
case AF_INET6:
addr6.sin6_family = AF_INET6;
if (!addr_str)
addr6.sin6_addr = in6addr_any;
else if (!inet_pton(family, addr_str, &addr6.sin6_addr))
error(1, errno, "inet_pton failed: %s", addr_str);
addr6.sin6_port = htons(PORT);
sz = sizeof(addr6);
addr = (struct sockaddr *)&addr6;
break;
default:
error(1, 0, "Unsupported family %d", family);
/* clang does not recognize error() above as terminating
* the program, so it complains that saddr, sz are
* not initialized when this code path is taken. Silence it.
*/
return;
}
for (i = 0; i < count; ++i) {
rcv_fds[i] = socket(family, proto, 0);
if (rcv_fds[i] < 0)
error(1, errno, "failed to create receive socket");
opt = 1;
if (setsockopt(rcv_fds[i], SOL_SOCKET, SO_REUSEPORT, &opt,
sizeof(opt)))
error(1, errno, "failed to set SO_REUSEPORT");
if (bind(rcv_fds[i], addr, sz))
error(1, errno, "failed to bind receive socket");
if (proto == SOCK_STREAM && listen(rcv_fds[i], 10))
error(1, errno, "tcp: failed to listen on receive port");
else if (proto == SOCK_DCCP) {
if (setsockopt(rcv_fds[i], SOL_DCCP,
DCCP_SOCKOPT_SERVICE,
&(int) {htonl(42)}, sizeof(int)))
error(1, errno, "failed to setsockopt");
if (listen(rcv_fds[i], 10))
error(1, errno, "dccp: failed to listen on receive port");
}
}
}
static int connect_and_send(int family, int proto)
{
struct sockaddr_in saddr4 = {0};
struct sockaddr_in daddr4 = {0};
struct sockaddr_in6 saddr6 = {0};
struct sockaddr_in6 daddr6 = {0};
struct sockaddr *saddr, *daddr;
int fd, sz;
switch (family) {
case AF_INET:
saddr4.sin_family = AF_INET;
saddr4.sin_addr.s_addr = htonl(INADDR_ANY);
saddr4.sin_port = 0;
daddr4.sin_family = AF_INET;
if (!inet_pton(family, IP4_ADDR, &daddr4.sin_addr.s_addr))
error(1, errno, "inet_pton failed: %s", IP4_ADDR);
daddr4.sin_port = htons(PORT);
sz = sizeof(saddr4);
saddr = (struct sockaddr *)&saddr4;
daddr = (struct sockaddr *)&daddr4;
break;
case AF_INET6:
saddr6.sin6_family = AF_INET6;
saddr6.sin6_addr = in6addr_any;
daddr6.sin6_family = AF_INET6;
if (!inet_pton(family, IP6_ADDR, &daddr6.sin6_addr))
error(1, errno, "inet_pton failed: %s", IP6_ADDR);
daddr6.sin6_port = htons(PORT);
sz = sizeof(saddr6);
saddr = (struct sockaddr *)&saddr6;
daddr = (struct sockaddr *)&daddr6;
break;
default:
error(1, 0, "Unsupported family %d", family);
/* clang does not recognize error() above as terminating
* the program, so it complains that saddr, daddr, sz are
* not initialized when this code path is taken. Silence it.
*/
return -1;
}
fd = socket(family, proto, 0);
if (fd < 0)
error(1, errno, "failed to create send socket");
if (proto == SOCK_DCCP &&
setsockopt(fd, SOL_DCCP, DCCP_SOCKOPT_SERVICE,
&(int){htonl(42)}, sizeof(int)))
error(1, errno, "failed to setsockopt");
if (bind(fd, saddr, sz))
error(1, errno, "failed to bind send socket");
if (connect(fd, daddr, sz))
error(1, errno, "failed to connect send socket");
if (send(fd, "a", 1, 0) < 0)
error(1, errno, "failed to send message");
return fd;
}
static int receive_once(int epfd, int proto)
{
struct epoll_event ev;
int i, fd;
char buf[8];
i = epoll_wait(epfd, &ev, 1, 3);
if (i < 0)
error(1, errno, "epoll_wait failed");
if (proto == SOCK_STREAM || proto == SOCK_DCCP) {
fd = accept(ev.data.fd, NULL, NULL);
if (fd < 0)
error(1, errno, "failed to accept");
i = recv(fd, buf, sizeof(buf), 0);
close(fd);
} else {
i = recv(ev.data.fd, buf, sizeof(buf), 0);
}
if (i < 0)
error(1, errno, "failed to recv");
return ev.data.fd;
}
static void test(int *rcv_fds, int count, int family, int proto, int fd)
{
struct epoll_event ev;
int epfd, i, send_fd, recv_fd;
epfd = epoll_create(1);
if (epfd < 0)
error(1, errno, "failed to create epoll");
ev.events = EPOLLIN;
for (i = 0; i < count; ++i) {
ev.data.fd = rcv_fds[i];
if (epoll_ctl(epfd, EPOLL_CTL_ADD, rcv_fds[i], &ev))
error(1, errno, "failed to register sock epoll");
}
send_fd = connect_and_send(family, proto);
recv_fd = receive_once(epfd, proto);
if (recv_fd != fd)
error(1, 0, "received on an unexpected socket");
close(send_fd);
close(epfd);
}
static void run_one_test(int fam_send, int fam_rcv, int proto,
const char *addr_str)
{
/* Below we test that a socket listening on a specific address
* is always selected in preference over a socket listening
* on addr_any. Bugs where this is not the case often result
* in sockets created first or last to get picked. So below
* we make sure that there are always addr_any sockets created
* before and after a specific socket is created.
*/
int rcv_fds[10], i;
build_rcv_fd(AF_INET, proto, rcv_fds, 2, NULL);
build_rcv_fd(AF_INET6, proto, rcv_fds + 2, 2, NULL);
build_rcv_fd(fam_rcv, proto, rcv_fds + 4, 1, addr_str);
build_rcv_fd(AF_INET, proto, rcv_fds + 5, 2, NULL);
build_rcv_fd(AF_INET6, proto, rcv_fds + 7, 2, NULL);
test(rcv_fds, 9, fam_send, proto, rcv_fds[4]);
for (i = 0; i < 9; ++i)
close(rcv_fds[i]);
fprintf(stderr, "pass\n");
}
static void test_proto(int proto, const char *proto_str)
{
if (proto == SOCK_DCCP) {
int test_fd;
test_fd = socket(AF_INET, proto, 0);
if (test_fd < 0) {
if (errno == ESOCKTNOSUPPORT) {
fprintf(stderr, "DCCP not supported: skipping DCCP tests\n");
return;
} else
error(1, errno, "failed to create a DCCP socket");
}
close(test_fd);
}
fprintf(stderr, "%s IPv4 ... ", proto_str);
run_one_test(AF_INET, AF_INET, proto, IP4_ADDR);
fprintf(stderr, "%s IPv6 ... ", proto_str);
run_one_test(AF_INET6, AF_INET6, proto, IP6_ADDR);
fprintf(stderr, "%s IPv4 mapped to IPv6 ... ", proto_str);
run_one_test(AF_INET, AF_INET6, proto, IP4_MAPPED6);
}
int main(void)
{
test_proto(SOCK_DGRAM, "UDP");
test_proto(SOCK_STREAM, "TCP");
test_proto(SOCK_DCCP, "DCCP");
fprintf(stderr, "SUCCESS\n");
return 0;
}
| linux-master | tools/testing/selftests/net/reuseport_addr_any.c |
// SPDX-License-Identifier: GPL-2.0
/*
* Test functionality of BPF filters with SO_REUSEPORT. This program creates
* an SO_REUSEPORT receiver group containing one socket per CPU core. It then
* creates a BPF program that will select a socket from this group based
* on the core id that receives the packet. The sending code artificially
* moves itself to run on different core ids and sends one message from
* each core. Since these packets are delivered over loopback, they should
* arrive on the same core that sent them. The receiving code then ensures
* that the packet was received on the socket for the corresponding core id.
* This entire process is done for several different core id permutations
* and for each IPv4/IPv6 and TCP/UDP combination.
*/
#define _GNU_SOURCE
#include <arpa/inet.h>
#include <errno.h>
#include <error.h>
#include <linux/filter.h>
#include <linux/in.h>
#include <linux/unistd.h>
#include <sched.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/epoll.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <unistd.h>
static const int PORT = 8888;
static void build_rcv_group(int *rcv_fd, size_t len, int family, int proto)
{
struct sockaddr_storage addr;
struct sockaddr_in *addr4;
struct sockaddr_in6 *addr6;
size_t i;
int opt;
switch (family) {
case AF_INET:
addr4 = (struct sockaddr_in *)&addr;
addr4->sin_family = AF_INET;
addr4->sin_addr.s_addr = htonl(INADDR_ANY);
addr4->sin_port = htons(PORT);
break;
case AF_INET6:
addr6 = (struct sockaddr_in6 *)&addr;
addr6->sin6_family = AF_INET6;
addr6->sin6_addr = in6addr_any;
addr6->sin6_port = htons(PORT);
break;
default:
error(1, 0, "Unsupported family %d", family);
}
for (i = 0; i < len; ++i) {
rcv_fd[i] = socket(family, proto, 0);
if (rcv_fd[i] < 0)
error(1, errno, "failed to create receive socket");
opt = 1;
if (setsockopt(rcv_fd[i], SOL_SOCKET, SO_REUSEPORT, &opt,
sizeof(opt)))
error(1, errno, "failed to set SO_REUSEPORT");
if (bind(rcv_fd[i], (struct sockaddr *)&addr, sizeof(addr)))
error(1, errno, "failed to bind receive socket");
if (proto == SOCK_STREAM && listen(rcv_fd[i], len * 10))
error(1, errno, "failed to listen on receive port");
}
}
static void attach_bpf(int fd)
{
struct sock_filter code[] = {
/* A = raw_smp_processor_id() */
{ BPF_LD | BPF_W | BPF_ABS, 0, 0, SKF_AD_OFF + SKF_AD_CPU },
/* return A */
{ BPF_RET | BPF_A, 0, 0, 0 },
};
struct sock_fprog p = {
.len = 2,
.filter = code,
};
if (setsockopt(fd, SOL_SOCKET, SO_ATTACH_REUSEPORT_CBPF, &p, sizeof(p)))
error(1, errno, "failed to set SO_ATTACH_REUSEPORT_CBPF");
}
static void send_from_cpu(int cpu_id, int family, int proto)
{
struct sockaddr_storage saddr, daddr;
struct sockaddr_in *saddr4, *daddr4;
struct sockaddr_in6 *saddr6, *daddr6;
cpu_set_t cpu_set;
int fd;
switch (family) {
case AF_INET:
saddr4 = (struct sockaddr_in *)&saddr;
saddr4->sin_family = AF_INET;
saddr4->sin_addr.s_addr = htonl(INADDR_ANY);
saddr4->sin_port = 0;
daddr4 = (struct sockaddr_in *)&daddr;
daddr4->sin_family = AF_INET;
daddr4->sin_addr.s_addr = htonl(INADDR_LOOPBACK);
daddr4->sin_port = htons(PORT);
break;
case AF_INET6:
saddr6 = (struct sockaddr_in6 *)&saddr;
saddr6->sin6_family = AF_INET6;
saddr6->sin6_addr = in6addr_any;
saddr6->sin6_port = 0;
daddr6 = (struct sockaddr_in6 *)&daddr;
daddr6->sin6_family = AF_INET6;
daddr6->sin6_addr = in6addr_loopback;
daddr6->sin6_port = htons(PORT);
break;
default:
error(1, 0, "Unsupported family %d", family);
}
memset(&cpu_set, 0, sizeof(cpu_set));
CPU_SET(cpu_id, &cpu_set);
if (sched_setaffinity(0, sizeof(cpu_set), &cpu_set) < 0)
error(1, errno, "failed to pin to cpu");
fd = socket(family, proto, 0);
if (fd < 0)
error(1, errno, "failed to create send socket");
if (bind(fd, (struct sockaddr *)&saddr, sizeof(saddr)))
error(1, errno, "failed to bind send socket");
if (connect(fd, (struct sockaddr *)&daddr, sizeof(daddr)))
error(1, errno, "failed to connect send socket");
if (send(fd, "a", 1, 0) < 0)
error(1, errno, "failed to send message");
close(fd);
}
static
void receive_on_cpu(int *rcv_fd, int len, int epfd, int cpu_id, int proto)
{
struct epoll_event ev;
int i, fd;
char buf[8];
i = epoll_wait(epfd, &ev, 1, -1);
if (i < 0)
error(1, errno, "epoll_wait failed");
if (proto == SOCK_STREAM) {
fd = accept(ev.data.fd, NULL, NULL);
if (fd < 0)
error(1, errno, "failed to accept");
i = recv(fd, buf, sizeof(buf), 0);
close(fd);
} else {
i = recv(ev.data.fd, buf, sizeof(buf), 0);
}
if (i < 0)
error(1, errno, "failed to recv");
for (i = 0; i < len; ++i)
if (ev.data.fd == rcv_fd[i])
break;
if (i == len)
error(1, 0, "failed to find socket");
fprintf(stderr, "send cpu %d, receive socket %d\n", cpu_id, i);
if (cpu_id != i)
error(1, 0, "cpu id/receive socket mismatch");
}
static void test(int *rcv_fd, int len, int family, int proto)
{
struct epoll_event ev;
int epfd, cpu;
build_rcv_group(rcv_fd, len, family, proto);
attach_bpf(rcv_fd[0]);
epfd = epoll_create(1);
if (epfd < 0)
error(1, errno, "failed to create epoll");
for (cpu = 0; cpu < len; ++cpu) {
ev.events = EPOLLIN;
ev.data.fd = rcv_fd[cpu];
if (epoll_ctl(epfd, EPOLL_CTL_ADD, rcv_fd[cpu], &ev))
error(1, errno, "failed to register sock epoll");
}
/* Forward iterate */
for (cpu = 0; cpu < len; ++cpu) {
send_from_cpu(cpu, family, proto);
receive_on_cpu(rcv_fd, len, epfd, cpu, proto);
}
/* Reverse iterate */
for (cpu = len - 1; cpu >= 0; --cpu) {
send_from_cpu(cpu, family, proto);
receive_on_cpu(rcv_fd, len, epfd, cpu, proto);
}
/* Even cores */
for (cpu = 0; cpu < len; cpu += 2) {
send_from_cpu(cpu, family, proto);
receive_on_cpu(rcv_fd, len, epfd, cpu, proto);
}
/* Odd cores */
for (cpu = 1; cpu < len; cpu += 2) {
send_from_cpu(cpu, family, proto);
receive_on_cpu(rcv_fd, len, epfd, cpu, proto);
}
close(epfd);
for (cpu = 0; cpu < len; ++cpu)
close(rcv_fd[cpu]);
}
int main(void)
{
int *rcv_fd, cpus;
cpus = sysconf(_SC_NPROCESSORS_ONLN);
if (cpus <= 0)
error(1, errno, "failed counting cpus");
rcv_fd = calloc(cpus, sizeof(int));
if (!rcv_fd)
error(1, 0, "failed to allocate array");
fprintf(stderr, "---- IPv4 UDP ----\n");
test(rcv_fd, cpus, AF_INET, SOCK_DGRAM);
fprintf(stderr, "---- IPv6 UDP ----\n");
test(rcv_fd, cpus, AF_INET6, SOCK_DGRAM);
fprintf(stderr, "---- IPv4 TCP ----\n");
test(rcv_fd, cpus, AF_INET, SOCK_STREAM);
fprintf(stderr, "---- IPv6 TCP ----\n");
test(rcv_fd, cpus, AF_INET6, SOCK_STREAM);
free(rcv_fd);
fprintf(stderr, "SUCCESS\n");
return 0;
}
| linux-master | tools/testing/selftests/net/reuseport_bpf_cpu.c |
// SPDX-License-Identifier: GPL-2.0-only
/*
* Copyright 2018 Google Inc.
* Author: Eric Dumazet ([email protected])
*
* Reference program demonstrating tcp mmap() usage,
* and SO_RCVLOWAT hints for receiver.
*
* Note : NIC with header split is needed to use mmap() on TCP :
* Each incoming frame must be a multiple of PAGE_SIZE bytes of TCP payload.
*
* How to use on loopback interface :
*
* ifconfig lo mtu 61512 # 15*4096 + 40 (ipv6 header) + 32 (TCP with TS option header)
* tcp_mmap -s -z &
* tcp_mmap -H ::1 -z
*
* Or leave default lo mtu, but use -M option to set TCP_MAXSEG option to (4096 + 12)
* (4096 : page size on x86, 12: TCP TS option length)
* tcp_mmap -s -z -M $((4096+12)) &
* tcp_mmap -H ::1 -z -M $((4096+12))
*
* Note: -z option on sender uses MSG_ZEROCOPY, which forces a copy when packets go through loopback interface.
* We might use sendfile() instead, but really this test program is about mmap(), for receivers ;)
*
* $ ./tcp_mmap -s & # Without mmap()
* $ for i in {1..4}; do ./tcp_mmap -H ::1 -z ; done
* received 32768 MB (0 % mmap'ed) in 14.1157 s, 19.4732 Gbit
* cpu usage user:0.057 sys:7.815, 240.234 usec per MB, 65531 c-switches
* received 32768 MB (0 % mmap'ed) in 14.6833 s, 18.7204 Gbit
* cpu usage user:0.043 sys:8.103, 248.596 usec per MB, 65524 c-switches
* received 32768 MB (0 % mmap'ed) in 11.143 s, 24.6682 Gbit
* cpu usage user:0.044 sys:6.576, 202.026 usec per MB, 65519 c-switches
* received 32768 MB (0 % mmap'ed) in 14.9056 s, 18.4413 Gbit
* cpu usage user:0.036 sys:8.193, 251.129 usec per MB, 65530 c-switches
* $ kill %1 # kill tcp_mmap server
*
* $ ./tcp_mmap -s -z & # With mmap()
* $ for i in {1..4}; do ./tcp_mmap -H ::1 -z ; done
* received 32768 MB (99.9939 % mmap'ed) in 6.73792 s, 40.7956 Gbit
* cpu usage user:0.045 sys:2.827, 87.6465 usec per MB, 65532 c-switches
* received 32768 MB (99.9939 % mmap'ed) in 7.26732 s, 37.8238 Gbit
* cpu usage user:0.037 sys:3.087, 95.3369 usec per MB, 65532 c-switches
* received 32768 MB (99.9939 % mmap'ed) in 7.61661 s, 36.0893 Gbit
* cpu usage user:0.046 sys:3.559, 110.016 usec per MB, 65529 c-switches
* received 32768 MB (99.9939 % mmap'ed) in 7.43764 s, 36.9577 Gbit
* cpu usage user:0.035 sys:3.467, 106.873 usec per MB, 65530 c-switches
*/
#define _GNU_SOURCE
#include <pthread.h>
#include <sys/types.h>
#include <fcntl.h>
#include <error.h>
#include <sys/socket.h>
#include <sys/mman.h>
#include <sys/resource.h>
#include <unistd.h>
#include <string.h>
#include <stdlib.h>
#include <stdio.h>
#include <errno.h>
#include <time.h>
#include <sys/time.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <poll.h>
#include <linux/tcp.h>
#include <assert.h>
#include <openssl/pem.h>
#ifndef MSG_ZEROCOPY
#define MSG_ZEROCOPY 0x4000000
#endif
#ifndef min
#define min(a, b) ((a) < (b) ? (a) : (b))
#endif
#define FILE_SZ (1ULL << 35)
static int cfg_family = AF_INET6;
static socklen_t cfg_alen = sizeof(struct sockaddr_in6);
static int cfg_port = 8787;
static int rcvbuf; /* Default: autotuning. Can be set with -r <integer> option */
static int sndbuf; /* Default: autotuning. Can be set with -w <integer> option */
static int zflg; /* zero copy option. (MSG_ZEROCOPY for sender, mmap() for receiver */
static int xflg; /* hash received data (simple xor) (-h option) */
static int keepflag; /* -k option: receiver shall keep all received file in memory (no munmap() calls) */
static int integrity; /* -i option: sender and receiver compute sha256 over the data.*/
static size_t chunk_size = 512*1024;
static size_t map_align;
unsigned long htotal;
unsigned int digest_len;
static inline void prefetch(const void *x)
{
#if defined(__x86_64__)
asm volatile("prefetcht0 %P0" : : "m" (*(const char *)x));
#endif
}
void hash_zone(void *zone, unsigned int length)
{
unsigned long temp = htotal;
while (length >= 8*sizeof(long)) {
prefetch(zone + 384);
temp ^= *(unsigned long *)zone;
temp ^= *(unsigned long *)(zone + sizeof(long));
temp ^= *(unsigned long *)(zone + 2*sizeof(long));
temp ^= *(unsigned long *)(zone + 3*sizeof(long));
temp ^= *(unsigned long *)(zone + 4*sizeof(long));
temp ^= *(unsigned long *)(zone + 5*sizeof(long));
temp ^= *(unsigned long *)(zone + 6*sizeof(long));
temp ^= *(unsigned long *)(zone + 7*sizeof(long));
zone += 8*sizeof(long);
length -= 8*sizeof(long);
}
while (length >= 1) {
temp ^= *(unsigned char *)zone;
zone += 1;
length--;
}
htotal = temp;
}
#define ALIGN_UP(x, align_to) (((x) + ((align_to)-1)) & ~((align_to)-1))
#define ALIGN_PTR_UP(p, ptr_align_to) ((typeof(p))ALIGN_UP((unsigned long)(p), ptr_align_to))
static void *mmap_large_buffer(size_t need, size_t *allocated)
{
void *buffer;
size_t sz;
/* Attempt to use huge pages if possible. */
sz = ALIGN_UP(need, map_align);
buffer = mmap(NULL, sz, PROT_READ | PROT_WRITE,
MAP_PRIVATE | MAP_ANONYMOUS | MAP_HUGETLB, -1, 0);
if (buffer == (void *)-1) {
sz = need;
buffer = mmap(NULL, sz, PROT_READ | PROT_WRITE,
MAP_PRIVATE | MAP_ANONYMOUS | MAP_POPULATE,
-1, 0);
if (buffer != (void *)-1)
fprintf(stderr, "MAP_HUGETLB attempt failed, look at /sys/kernel/mm/hugepages for optimal performance\n");
}
*allocated = sz;
return buffer;
}
static uint32_t tcp_info_get_rcv_mss(int fd)
{
socklen_t sz = sizeof(struct tcp_info);
struct tcp_info info;
if (getsockopt(fd, IPPROTO_TCP, TCP_INFO, &info, &sz)) {
fprintf(stderr, "Error fetching TCP_INFO\n");
return 0;
}
return info.tcpi_rcv_mss;
}
void *child_thread(void *arg)
{
unsigned char digest[SHA256_DIGEST_LENGTH];
unsigned long total_mmap = 0, total = 0;
struct tcp_zerocopy_receive zc;
unsigned char *buffer = NULL;
unsigned long delta_usec;
EVP_MD_CTX *ctx = NULL;
int flags = MAP_SHARED;
struct timeval t0, t1;
void *raddr = NULL;
void *addr = NULL;
double throughput;
struct rusage ru;
size_t buffer_sz;
int lu, fd;
fd = (int)(unsigned long)arg;
gettimeofday(&t0, NULL);
fcntl(fd, F_SETFL, O_NDELAY);
buffer = mmap_large_buffer(chunk_size, &buffer_sz);
if (buffer == (void *)-1) {
perror("mmap");
goto error;
}
if (zflg) {
raddr = mmap(NULL, chunk_size + map_align, PROT_READ, flags, fd, 0);
if (raddr == (void *)-1) {
perror("mmap");
zflg = 0;
} else {
addr = ALIGN_PTR_UP(raddr, map_align);
}
}
if (integrity) {
ctx = EVP_MD_CTX_new();
if (!ctx) {
perror("cannot enable SHA computing");
goto error;
}
EVP_DigestInit_ex(ctx, EVP_sha256(), NULL);
}
while (1) {
struct pollfd pfd = { .fd = fd, .events = POLLIN, };
int sub;
poll(&pfd, 1, 10000);
if (zflg) {
socklen_t zc_len = sizeof(zc);
int res;
memset(&zc, 0, sizeof(zc));
zc.address = (__u64)((unsigned long)addr);
zc.length = min(chunk_size, FILE_SZ - total);
res = getsockopt(fd, IPPROTO_TCP, TCP_ZEROCOPY_RECEIVE,
&zc, &zc_len);
if (res == -1)
break;
if (zc.length) {
assert(zc.length <= chunk_size);
if (integrity)
EVP_DigestUpdate(ctx, addr, zc.length);
total_mmap += zc.length;
if (xflg)
hash_zone(addr, zc.length);
/* It is more efficient to unmap the pages right now,
* instead of doing this in next TCP_ZEROCOPY_RECEIVE.
*/
madvise(addr, zc.length, MADV_DONTNEED);
total += zc.length;
}
if (zc.recv_skip_hint) {
assert(zc.recv_skip_hint <= chunk_size);
lu = read(fd, buffer, min(zc.recv_skip_hint,
FILE_SZ - total));
if (lu > 0) {
if (integrity)
EVP_DigestUpdate(ctx, buffer, lu);
if (xflg)
hash_zone(buffer, lu);
total += lu;
}
if (lu == 0)
goto end;
}
continue;
}
sub = 0;
while (sub < chunk_size) {
lu = read(fd, buffer + sub, min(chunk_size - sub,
FILE_SZ - total));
if (lu == 0)
goto end;
if (lu < 0)
break;
if (integrity)
EVP_DigestUpdate(ctx, buffer + sub, lu);
if (xflg)
hash_zone(buffer + sub, lu);
total += lu;
sub += lu;
}
}
end:
gettimeofday(&t1, NULL);
delta_usec = (t1.tv_sec - t0.tv_sec) * 1000000 + t1.tv_usec - t0.tv_usec;
if (integrity) {
fcntl(fd, F_SETFL, 0);
EVP_DigestFinal_ex(ctx, digest, &digest_len);
lu = read(fd, buffer, SHA256_DIGEST_LENGTH);
if (lu != SHA256_DIGEST_LENGTH)
perror("Error: Cannot read SHA256\n");
if (memcmp(digest, buffer,
SHA256_DIGEST_LENGTH))
fprintf(stderr, "Error: SHA256 of the data is not right\n");
else
printf("\nSHA256 is correct\n");
}
throughput = 0;
if (delta_usec)
throughput = total * 8.0 / (double)delta_usec / 1000.0;
getrusage(RUSAGE_THREAD, &ru);
if (total > 1024*1024) {
unsigned long total_usec;
unsigned long mb = total >> 20;
total_usec = 1000000*ru.ru_utime.tv_sec + ru.ru_utime.tv_usec +
1000000*ru.ru_stime.tv_sec + ru.ru_stime.tv_usec;
printf("received %lg MB (%lg %% mmap'ed) in %lg s, %lg Gbit\n"
" cpu usage user:%lg sys:%lg, %lg usec per MB, %lu c-switches, rcv_mss %u\n",
total / (1024.0 * 1024.0),
100.0*total_mmap/total,
(double)delta_usec / 1000000.0,
throughput,
(double)ru.ru_utime.tv_sec + (double)ru.ru_utime.tv_usec / 1000000.0,
(double)ru.ru_stime.tv_sec + (double)ru.ru_stime.tv_usec / 1000000.0,
(double)total_usec/mb,
ru.ru_nvcsw,
tcp_info_get_rcv_mss(fd));
}
error:
munmap(buffer, buffer_sz);
close(fd);
if (zflg)
munmap(raddr, chunk_size + map_align);
pthread_exit(0);
}
static void apply_rcvsnd_buf(int fd)
{
if (rcvbuf && setsockopt(fd, SOL_SOCKET,
SO_RCVBUF, &rcvbuf, sizeof(rcvbuf)) == -1) {
perror("setsockopt SO_RCVBUF");
}
if (sndbuf && setsockopt(fd, SOL_SOCKET,
SO_SNDBUF, &sndbuf, sizeof(sndbuf)) == -1) {
perror("setsockopt SO_SNDBUF");
}
}
static void setup_sockaddr(int domain, const char *str_addr,
struct sockaddr_storage *sockaddr)
{
struct sockaddr_in6 *addr6 = (void *) sockaddr;
struct sockaddr_in *addr4 = (void *) sockaddr;
switch (domain) {
case PF_INET:
memset(addr4, 0, sizeof(*addr4));
addr4->sin_family = AF_INET;
addr4->sin_port = htons(cfg_port);
if (str_addr &&
inet_pton(AF_INET, str_addr, &(addr4->sin_addr)) != 1)
error(1, 0, "ipv4 parse error: %s", str_addr);
break;
case PF_INET6:
memset(addr6, 0, sizeof(*addr6));
addr6->sin6_family = AF_INET6;
addr6->sin6_port = htons(cfg_port);
if (str_addr &&
inet_pton(AF_INET6, str_addr, &(addr6->sin6_addr)) != 1)
error(1, 0, "ipv6 parse error: %s", str_addr);
break;
default:
error(1, 0, "illegal domain");
}
}
static void do_accept(int fdlisten)
{
pthread_attr_t attr;
int rcvlowat;
pthread_attr_init(&attr);
pthread_attr_setdetachstate(&attr, PTHREAD_CREATE_DETACHED);
rcvlowat = chunk_size;
if (setsockopt(fdlisten, SOL_SOCKET, SO_RCVLOWAT,
&rcvlowat, sizeof(rcvlowat)) == -1) {
perror("setsockopt SO_RCVLOWAT");
}
apply_rcvsnd_buf(fdlisten);
while (1) {
struct sockaddr_in addr;
socklen_t addrlen = sizeof(addr);
pthread_t th;
int fd, res;
fd = accept(fdlisten, (struct sockaddr *)&addr, &addrlen);
if (fd == -1) {
perror("accept");
continue;
}
res = pthread_create(&th, &attr, child_thread,
(void *)(unsigned long)fd);
if (res) {
errno = res;
perror("pthread_create");
close(fd);
}
}
}
/* Each thread should reserve a big enough vma to avoid
* spinlock collisions in ptl locks.
* This size is 2MB on x86_64, and is exported in /proc/meminfo.
*/
static unsigned long default_huge_page_size(void)
{
FILE *f = fopen("/proc/meminfo", "r");
unsigned long hps = 0;
size_t linelen = 0;
char *line = NULL;
if (!f)
return 0;
while (getline(&line, &linelen, f) > 0) {
if (sscanf(line, "Hugepagesize: %lu kB", &hps) == 1) {
hps <<= 10;
break;
}
}
free(line);
fclose(f);
return hps;
}
static void randomize(void *target, size_t count)
{
static int urandom = -1;
ssize_t got;
urandom = open("/dev/urandom", O_RDONLY);
if (urandom < 0) {
perror("open /dev/urandom");
exit(1);
}
got = read(urandom, target, count);
if (got != count) {
perror("read /dev/urandom");
exit(1);
}
}
int main(int argc, char *argv[])
{
unsigned char digest[SHA256_DIGEST_LENGTH];
struct sockaddr_storage listenaddr, addr;
unsigned int max_pacing_rate = 0;
EVP_MD_CTX *ctx = NULL;
unsigned char *buffer;
uint64_t total = 0;
char *host = NULL;
int fd, c, on = 1;
size_t buffer_sz;
int sflg = 0;
int mss = 0;
while ((c = getopt(argc, argv, "46p:svr:w:H:zxkP:M:C:a:i")) != -1) {
switch (c) {
case '4':
cfg_family = PF_INET;
cfg_alen = sizeof(struct sockaddr_in);
break;
case '6':
cfg_family = PF_INET6;
cfg_alen = sizeof(struct sockaddr_in6);
break;
case 'p':
cfg_port = atoi(optarg);
break;
case 'H':
host = optarg;
break;
case 's': /* server : listen for incoming connections */
sflg++;
break;
case 'r':
rcvbuf = atoi(optarg);
break;
case 'w':
sndbuf = atoi(optarg);
break;
case 'z':
zflg = 1;
break;
case 'M':
mss = atoi(optarg);
break;
case 'x':
xflg = 1;
break;
case 'k':
keepflag = 1;
break;
case 'P':
max_pacing_rate = atoi(optarg) ;
break;
case 'C':
chunk_size = atol(optarg);
break;
case 'a':
map_align = atol(optarg);
break;
case 'i':
integrity = 1;
break;
default:
exit(1);
}
}
if (!map_align) {
map_align = default_huge_page_size();
/* if really /proc/meminfo is not helping,
* we use the default x86_64 hugepagesize.
*/
if (!map_align)
map_align = 2*1024*1024;
}
if (sflg) {
int fdlisten = socket(cfg_family, SOCK_STREAM, 0);
if (fdlisten == -1) {
perror("socket");
exit(1);
}
apply_rcvsnd_buf(fdlisten);
setsockopt(fdlisten, SOL_SOCKET, SO_REUSEADDR, &on, sizeof(on));
setup_sockaddr(cfg_family, host, &listenaddr);
if (mss &&
setsockopt(fdlisten, IPPROTO_TCP, TCP_MAXSEG,
&mss, sizeof(mss)) == -1) {
perror("setsockopt TCP_MAXSEG");
exit(1);
}
if (bind(fdlisten, (const struct sockaddr *)&listenaddr, cfg_alen) == -1) {
perror("bind");
exit(1);
}
if (listen(fdlisten, 128) == -1) {
perror("listen");
exit(1);
}
do_accept(fdlisten);
}
buffer = mmap_large_buffer(chunk_size, &buffer_sz);
if (buffer == (unsigned char *)-1) {
perror("mmap");
exit(1);
}
fd = socket(cfg_family, SOCK_STREAM, 0);
if (fd == -1) {
perror("socket");
exit(1);
}
apply_rcvsnd_buf(fd);
setup_sockaddr(cfg_family, host, &addr);
if (mss &&
setsockopt(fd, IPPROTO_TCP, TCP_MAXSEG, &mss, sizeof(mss)) == -1) {
perror("setsockopt TCP_MAXSEG");
exit(1);
}
if (connect(fd, (const struct sockaddr *)&addr, cfg_alen) == -1) {
perror("connect");
exit(1);
}
if (max_pacing_rate &&
setsockopt(fd, SOL_SOCKET, SO_MAX_PACING_RATE,
&max_pacing_rate, sizeof(max_pacing_rate)) == -1)
perror("setsockopt SO_MAX_PACING_RATE");
if (zflg && setsockopt(fd, SOL_SOCKET, SO_ZEROCOPY,
&on, sizeof(on)) == -1) {
perror("setsockopt SO_ZEROCOPY, (-z option disabled)");
zflg = 0;
}
if (integrity) {
randomize(buffer, buffer_sz);
ctx = EVP_MD_CTX_new();
if (!ctx) {
perror("cannot enable SHA computing");
exit(1);
}
EVP_DigestInit_ex(ctx, EVP_sha256(), NULL);
}
while (total < FILE_SZ) {
size_t offset = total % chunk_size;
int64_t wr = FILE_SZ - total;
if (wr > chunk_size - offset)
wr = chunk_size - offset;
/* Note : we just want to fill the pipe with random bytes */
wr = send(fd, buffer + offset,
(size_t)wr, zflg ? MSG_ZEROCOPY : 0);
if (wr <= 0)
break;
if (integrity)
EVP_DigestUpdate(ctx, buffer + offset, wr);
total += wr;
}
if (integrity && total == FILE_SZ) {
EVP_DigestFinal_ex(ctx, digest, &digest_len);
send(fd, digest, (size_t)SHA256_DIGEST_LENGTH, 0);
}
close(fd);
munmap(buffer, buffer_sz);
return 0;
}
| linux-master | tools/testing/selftests/net/tcp_mmap.c |
// SPDX-License-Identifier: GPL-2.0
/* Copyright Amazon.com Inc. or its affiliates. */
#include <sys/socket.h>
#include <netinet/in.h>
#include "../kselftest_harness.h"
FIXTURE(bind_timewait)
{
struct sockaddr_in addr;
socklen_t addrlen;
};
FIXTURE_VARIANT(bind_timewait)
{
__u32 addr_const;
};
FIXTURE_VARIANT_ADD(bind_timewait, localhost)
{
.addr_const = INADDR_LOOPBACK
};
FIXTURE_VARIANT_ADD(bind_timewait, addrany)
{
.addr_const = INADDR_ANY
};
FIXTURE_SETUP(bind_timewait)
{
self->addr.sin_family = AF_INET;
self->addr.sin_port = 0;
self->addr.sin_addr.s_addr = htonl(variant->addr_const);
self->addrlen = sizeof(self->addr);
}
FIXTURE_TEARDOWN(bind_timewait)
{
}
void create_timewait_socket(struct __test_metadata *_metadata,
FIXTURE_DATA(bind_timewait) *self)
{
int server_fd, client_fd, child_fd, ret;
struct sockaddr_in addr;
socklen_t addrlen;
server_fd = socket(AF_INET, SOCK_STREAM, 0);
ASSERT_GT(server_fd, 0);
ret = bind(server_fd, (struct sockaddr *)&self->addr, self->addrlen);
ASSERT_EQ(ret, 0);
ret = listen(server_fd, 1);
ASSERT_EQ(ret, 0);
ret = getsockname(server_fd, (struct sockaddr *)&self->addr, &self->addrlen);
ASSERT_EQ(ret, 0);
client_fd = socket(AF_INET, SOCK_STREAM, 0);
ASSERT_GT(client_fd, 0);
ret = connect(client_fd, (struct sockaddr *)&self->addr, self->addrlen);
ASSERT_EQ(ret, 0);
addrlen = sizeof(addr);
child_fd = accept(server_fd, (struct sockaddr *)&addr, &addrlen);
ASSERT_GT(child_fd, 0);
close(child_fd);
close(client_fd);
close(server_fd);
}
TEST_F(bind_timewait, 1)
{
int fd, ret;
create_timewait_socket(_metadata, self);
fd = socket(AF_INET, SOCK_STREAM, 0);
ASSERT_GT(fd, 0);
ret = bind(fd, (struct sockaddr *)&self->addr, self->addrlen);
ASSERT_EQ(ret, -1);
ASSERT_EQ(errno, EADDRINUSE);
close(fd);
}
TEST_HARNESS_MAIN
| linux-master | tools/testing/selftests/net/bind_timewait.c |
// SPDX-License-Identifier: GPL-2.0
/* Copyright Amazon.com Inc. or its affiliates. */
#include <sys/socket.h>
#include <netinet/in.h>
#include "../kselftest_harness.h"
struct in6_addr in6addr_v4mapped_any = {
.s6_addr = {
0, 0, 0, 0,
0, 0, 0, 0,
0, 0, 255, 255,
0, 0, 0, 0
}
};
struct in6_addr in6addr_v4mapped_loopback = {
.s6_addr = {
0, 0, 0, 0,
0, 0, 0, 0,
0, 0, 255, 255,
127, 0, 0, 1
}
};
FIXTURE(bind_wildcard)
{
struct sockaddr_in addr4;
struct sockaddr_in6 addr6;
};
FIXTURE_VARIANT(bind_wildcard)
{
const __u32 addr4_const;
const struct in6_addr *addr6_const;
int expected_errno;
};
FIXTURE_VARIANT_ADD(bind_wildcard, v4_any_v6_any)
{
.addr4_const = INADDR_ANY,
.addr6_const = &in6addr_any,
.expected_errno = EADDRINUSE,
};
FIXTURE_VARIANT_ADD(bind_wildcard, v4_any_v6_local)
{
.addr4_const = INADDR_ANY,
.addr6_const = &in6addr_loopback,
.expected_errno = 0,
};
FIXTURE_VARIANT_ADD(bind_wildcard, v4_any_v6_v4mapped_any)
{
.addr4_const = INADDR_ANY,
.addr6_const = &in6addr_v4mapped_any,
.expected_errno = EADDRINUSE,
};
FIXTURE_VARIANT_ADD(bind_wildcard, v4_any_v6_v4mapped_local)
{
.addr4_const = INADDR_ANY,
.addr6_const = &in6addr_v4mapped_loopback,
.expected_errno = EADDRINUSE,
};
FIXTURE_VARIANT_ADD(bind_wildcard, v4_local_v6_any)
{
.addr4_const = INADDR_LOOPBACK,
.addr6_const = &in6addr_any,
.expected_errno = EADDRINUSE,
};
FIXTURE_VARIANT_ADD(bind_wildcard, v4_local_v6_local)
{
.addr4_const = INADDR_LOOPBACK,
.addr6_const = &in6addr_loopback,
.expected_errno = 0,
};
FIXTURE_VARIANT_ADD(bind_wildcard, v4_local_v6_v4mapped_any)
{
.addr4_const = INADDR_LOOPBACK,
.addr6_const = &in6addr_v4mapped_any,
.expected_errno = EADDRINUSE,
};
FIXTURE_VARIANT_ADD(bind_wildcard, v4_local_v6_v4mapped_local)
{
.addr4_const = INADDR_LOOPBACK,
.addr6_const = &in6addr_v4mapped_loopback,
.expected_errno = EADDRINUSE,
};
FIXTURE_SETUP(bind_wildcard)
{
self->addr4.sin_family = AF_INET;
self->addr4.sin_port = htons(0);
self->addr4.sin_addr.s_addr = htonl(variant->addr4_const);
self->addr6.sin6_family = AF_INET6;
self->addr6.sin6_port = htons(0);
self->addr6.sin6_addr = *variant->addr6_const;
}
FIXTURE_TEARDOWN(bind_wildcard)
{
}
void bind_sockets(struct __test_metadata *_metadata,
FIXTURE_DATA(bind_wildcard) *self,
int expected_errno,
struct sockaddr *addr1, socklen_t addrlen1,
struct sockaddr *addr2, socklen_t addrlen2)
{
int fd[2];
int ret;
fd[0] = socket(addr1->sa_family, SOCK_STREAM, 0);
ASSERT_GT(fd[0], 0);
ret = bind(fd[0], addr1, addrlen1);
ASSERT_EQ(ret, 0);
ret = getsockname(fd[0], addr1, &addrlen1);
ASSERT_EQ(ret, 0);
((struct sockaddr_in *)addr2)->sin_port = ((struct sockaddr_in *)addr1)->sin_port;
fd[1] = socket(addr2->sa_family, SOCK_STREAM, 0);
ASSERT_GT(fd[1], 0);
ret = bind(fd[1], addr2, addrlen2);
if (expected_errno) {
ASSERT_EQ(ret, -1);
ASSERT_EQ(errno, expected_errno);
} else {
ASSERT_EQ(ret, 0);
}
close(fd[1]);
close(fd[0]);
}
TEST_F(bind_wildcard, v4_v6)
{
bind_sockets(_metadata, self, variant->expected_errno,
(struct sockaddr *)&self->addr4, sizeof(self->addr4),
(struct sockaddr *)&self->addr6, sizeof(self->addr6));
}
TEST_F(bind_wildcard, v6_v4)
{
bind_sockets(_metadata, self, variant->expected_errno,
(struct sockaddr *)&self->addr6, sizeof(self->addr6),
(struct sockaddr *)&self->addr4, sizeof(self->addr4));
}
TEST_HARNESS_MAIN
| linux-master | tools/testing/selftests/net/bind_wildcard.c |
/*
* Test for the regression introduced by
*
* b9470c27607b ("inet: kill smallest_size and smallest_port")
*
* If we open an ipv4 socket on a port with reuseaddr we shouldn't reset the tb
* when we open the ipv6 conterpart, which is what was happening previously.
*/
#include <errno.h>
#include <error.h>
#include <arpa/inet.h>
#include <netinet/in.h>
#include <stdbool.h>
#include <stdio.h>
#include <sys/socket.h>
#include <sys/types.h>
#include <unistd.h>
#define PORT 9999
int open_port(int ipv6, int any)
{
int fd = -1;
int reuseaddr = 1;
int v6only = 1;
int addrlen;
int ret = -1;
struct sockaddr *addr;
int family = ipv6 ? AF_INET6 : AF_INET;
struct sockaddr_in6 addr6 = {
.sin6_family = AF_INET6,
.sin6_port = htons(PORT),
.sin6_addr = in6addr_any
};
struct sockaddr_in addr4 = {
.sin_family = AF_INET,
.sin_port = htons(PORT),
.sin_addr.s_addr = any ? htonl(INADDR_ANY) : inet_addr("127.0.0.1"),
};
if (ipv6) {
addr = (struct sockaddr*)&addr6;
addrlen = sizeof(addr6);
} else {
addr = (struct sockaddr*)&addr4;
addrlen = sizeof(addr4);
}
if ((fd = socket(family, SOCK_STREAM, IPPROTO_TCP)) < 0) {
perror("socket");
goto out;
}
if (ipv6 && setsockopt(fd, IPPROTO_IPV6, IPV6_V6ONLY, (void*)&v6only,
sizeof(v6only)) < 0) {
perror("setsockopt IPV6_V6ONLY");
goto out;
}
if (setsockopt(fd, SOL_SOCKET, SO_REUSEADDR, &reuseaddr,
sizeof(reuseaddr)) < 0) {
perror("setsockopt SO_REUSEADDR");
goto out;
}
if (bind(fd, addr, addrlen) < 0) {
perror("bind");
goto out;
}
if (any)
return fd;
if (listen(fd, 1) < 0) {
perror("listen");
goto out;
}
return fd;
out:
close(fd);
return ret;
}
int main(void)
{
int listenfd;
int fd1, fd2;
fprintf(stderr, "Opening 127.0.0.1:%d\n", PORT);
listenfd = open_port(0, 0);
if (listenfd < 0)
error(1, errno, "Couldn't open listen socket");
fprintf(stderr, "Opening INADDR_ANY:%d\n", PORT);
fd1 = open_port(0, 1);
if (fd1 >= 0)
error(1, 0, "Was allowed to create an ipv4 reuseport on a already bound non-reuseport socket");
fprintf(stderr, "Opening in6addr_any:%d\n", PORT);
fd1 = open_port(1, 1);
if (fd1 < 0)
error(1, errno, "Couldn't open ipv6 reuseport");
fprintf(stderr, "Opening INADDR_ANY:%d\n", PORT);
fd2 = open_port(0, 1);
if (fd2 >= 0)
error(1, 0, "Was allowed to create an ipv4 reuseport on a already bound non-reuseport socket");
close(fd1);
fprintf(stderr, "Opening INADDR_ANY:%d after closing ipv6 socket\n", PORT);
fd1 = open_port(0, 1);
if (fd1 >= 0)
error(1, 0, "Was allowed to create an ipv4 reuseport on an already bound non-reuseport socket with no ipv6");
fprintf(stderr, "Success");
return 0;
}
| linux-master | tools/testing/selftests/net/reuseaddr_conflict.c |
// SPDX-License-Identifier: GPL-2.0
/* Test IPV6_FLOWINFO_MGR */
#define _GNU_SOURCE
#include <arpa/inet.h>
#include <error.h>
#include <errno.h>
#include <limits.h>
#include <linux/in6.h>
#include <stdbool.h>
#include <stdio.h>
#include <stdint.h>
#include <stdlib.h>
#include <string.h>
#include <sys/socket.h>
#include <sys/stat.h>
#include <sys/time.h>
#include <sys/types.h>
#include <sys/wait.h>
#include <unistd.h>
/* uapi/glibc weirdness may leave this undefined */
#ifndef IPV6_FLOWLABEL_MGR
#define IPV6_FLOWLABEL_MGR 32
#endif
/* from net/ipv6/ip6_flowlabel.c */
#define FL_MIN_LINGER 6
#define explain(x) \
do { if (cfg_verbose) fprintf(stderr, " " x "\n"); } while (0)
#define __expect(x) \
do { \
if (!(x)) \
fprintf(stderr, "[OK] " #x "\n"); \
else \
error(1, 0, "[ERR] " #x " (line %d)", __LINE__); \
} while (0)
#define expect_pass(x) __expect(x)
#define expect_fail(x) __expect(!(x))
static bool cfg_long_running;
static bool cfg_verbose;
static int flowlabel_get(int fd, uint32_t label, uint8_t share, uint16_t flags)
{
struct in6_flowlabel_req req = {
.flr_action = IPV6_FL_A_GET,
.flr_label = htonl(label),
.flr_flags = flags,
.flr_share = share,
};
/* do not pass IPV6_ADDR_ANY or IPV6_ADDR_MAPPED */
req.flr_dst.s6_addr[0] = 0xfd;
req.flr_dst.s6_addr[15] = 0x1;
return setsockopt(fd, SOL_IPV6, IPV6_FLOWLABEL_MGR, &req, sizeof(req));
}
static int flowlabel_put(int fd, uint32_t label)
{
struct in6_flowlabel_req req = {
.flr_action = IPV6_FL_A_PUT,
.flr_label = htonl(label),
};
return setsockopt(fd, SOL_IPV6, IPV6_FLOWLABEL_MGR, &req, sizeof(req));
}
static void run_tests(int fd)
{
int wstatus;
pid_t pid;
explain("cannot get non-existent label");
expect_fail(flowlabel_get(fd, 1, IPV6_FL_S_ANY, 0));
explain("cannot put non-existent label");
expect_fail(flowlabel_put(fd, 1));
explain("cannot create label greater than 20 bits");
expect_fail(flowlabel_get(fd, 0x1FFFFF, IPV6_FL_S_ANY,
IPV6_FL_F_CREATE));
explain("create a new label (FL_F_CREATE)");
expect_pass(flowlabel_get(fd, 1, IPV6_FL_S_ANY, IPV6_FL_F_CREATE));
explain("can get the label (without FL_F_CREATE)");
expect_pass(flowlabel_get(fd, 1, IPV6_FL_S_ANY, 0));
explain("can get it again with create flag set, too");
expect_pass(flowlabel_get(fd, 1, IPV6_FL_S_ANY, IPV6_FL_F_CREATE));
explain("cannot get it again with the exclusive (FL_FL_EXCL) flag");
expect_fail(flowlabel_get(fd, 1, IPV6_FL_S_ANY,
IPV6_FL_F_CREATE | IPV6_FL_F_EXCL));
explain("can now put exactly three references");
expect_pass(flowlabel_put(fd, 1));
expect_pass(flowlabel_put(fd, 1));
expect_pass(flowlabel_put(fd, 1));
expect_fail(flowlabel_put(fd, 1));
explain("create a new exclusive label (FL_S_EXCL)");
expect_pass(flowlabel_get(fd, 2, IPV6_FL_S_EXCL, IPV6_FL_F_CREATE));
explain("cannot get it again in non-exclusive mode");
expect_fail(flowlabel_get(fd, 2, IPV6_FL_S_ANY, IPV6_FL_F_CREATE));
explain("cannot get it again in exclusive mode either");
expect_fail(flowlabel_get(fd, 2, IPV6_FL_S_EXCL, IPV6_FL_F_CREATE));
expect_pass(flowlabel_put(fd, 2));
if (cfg_long_running) {
explain("cannot reuse the label, due to linger");
expect_fail(flowlabel_get(fd, 2, IPV6_FL_S_ANY,
IPV6_FL_F_CREATE));
explain("after sleep, can reuse");
sleep(FL_MIN_LINGER * 2 + 1);
expect_pass(flowlabel_get(fd, 2, IPV6_FL_S_ANY,
IPV6_FL_F_CREATE));
}
explain("create a new user-private label (FL_S_USER)");
expect_pass(flowlabel_get(fd, 3, IPV6_FL_S_USER, IPV6_FL_F_CREATE));
explain("cannot get it again in non-exclusive mode");
expect_fail(flowlabel_get(fd, 3, IPV6_FL_S_ANY, 0));
explain("cannot get it again in exclusive mode");
expect_fail(flowlabel_get(fd, 3, IPV6_FL_S_EXCL, 0));
explain("can get it again in user mode");
expect_pass(flowlabel_get(fd, 3, IPV6_FL_S_USER, 0));
explain("child process can get it too, but not after setuid(nobody)");
pid = fork();
if (pid == -1)
error(1, errno, "fork");
if (!pid) {
expect_pass(flowlabel_get(fd, 3, IPV6_FL_S_USER, 0));
if (setuid(USHRT_MAX))
fprintf(stderr, "[INFO] skip setuid child test\n");
else
expect_fail(flowlabel_get(fd, 3, IPV6_FL_S_USER, 0));
exit(0);
}
if (wait(&wstatus) == -1)
error(1, errno, "wait");
if (!WIFEXITED(wstatus) || WEXITSTATUS(wstatus) != 0)
error(1, errno, "wait: unexpected child result");
explain("create a new process-private label (FL_S_PROCESS)");
expect_pass(flowlabel_get(fd, 4, IPV6_FL_S_PROCESS, IPV6_FL_F_CREATE));
explain("can get it again");
expect_pass(flowlabel_get(fd, 4, IPV6_FL_S_PROCESS, 0));
explain("child process cannot can get it");
pid = fork();
if (pid == -1)
error(1, errno, "fork");
if (!pid) {
expect_fail(flowlabel_get(fd, 4, IPV6_FL_S_PROCESS, 0));
exit(0);
}
if (wait(&wstatus) == -1)
error(1, errno, "wait");
if (!WIFEXITED(wstatus) || WEXITSTATUS(wstatus) != 0)
error(1, errno, "wait: unexpected child result");
}
static void parse_opts(int argc, char **argv)
{
int c;
while ((c = getopt(argc, argv, "lv")) != -1) {
switch (c) {
case 'l':
cfg_long_running = true;
break;
case 'v':
cfg_verbose = true;
break;
default:
error(1, 0, "%s: parse error", argv[0]);
}
}
}
int main(int argc, char **argv)
{
int fd;
parse_opts(argc, argv);
fd = socket(PF_INET6, SOCK_DGRAM, 0);
if (fd == -1)
error(1, errno, "socket");
run_tests(fd);
if (close(fd))
error(1, errno, "close");
return 0;
}
| linux-master | tools/testing/selftests/net/ipv6_flowlabel_mgr.c |
/* Evaluate MSG_ZEROCOPY
*
* Send traffic between two processes over one of the supported
* protocols and modes:
*
* PF_INET/PF_INET6
* - SOCK_STREAM
* - SOCK_DGRAM
* - SOCK_DGRAM with UDP_CORK
* - SOCK_RAW
* - SOCK_RAW with IP_HDRINCL
*
* PF_PACKET
* - SOCK_DGRAM
* - SOCK_RAW
*
* PF_RDS
* - SOCK_SEQPACKET
*
* Start this program on two connected hosts, one in send mode and
* the other with option '-r' to put it in receiver mode.
*
* If zerocopy mode ('-z') is enabled, the sender will verify that
* the kernel queues completions on the error queue for all zerocopy
* transfers.
*/
#define _GNU_SOURCE
#include <arpa/inet.h>
#include <error.h>
#include <errno.h>
#include <limits.h>
#include <linux/errqueue.h>
#include <linux/if_packet.h>
#include <linux/ipv6.h>
#include <linux/socket.h>
#include <linux/sockios.h>
#include <net/ethernet.h>
#include <net/if.h>
#include <netinet/ip.h>
#include <netinet/ip6.h>
#include <netinet/tcp.h>
#include <netinet/udp.h>
#include <poll.h>
#include <sched.h>
#include <stdbool.h>
#include <stdio.h>
#include <stdint.h>
#include <stdlib.h>
#include <string.h>
#include <sys/ioctl.h>
#include <sys/socket.h>
#include <sys/stat.h>
#include <sys/time.h>
#include <sys/types.h>
#include <sys/wait.h>
#include <unistd.h>
#include <linux/rds.h>
#ifndef SO_EE_ORIGIN_ZEROCOPY
#define SO_EE_ORIGIN_ZEROCOPY 5
#endif
#ifndef SO_ZEROCOPY
#define SO_ZEROCOPY 60
#endif
#ifndef SO_EE_CODE_ZEROCOPY_COPIED
#define SO_EE_CODE_ZEROCOPY_COPIED 1
#endif
#ifndef MSG_ZEROCOPY
#define MSG_ZEROCOPY 0x4000000
#endif
static int cfg_cork;
static bool cfg_cork_mixed;
static int cfg_cpu = -1; /* default: pin to last cpu */
static int cfg_family = PF_UNSPEC;
static int cfg_ifindex = 1;
static int cfg_payload_len;
static int cfg_port = 8000;
static bool cfg_rx;
static int cfg_runtime_ms = 4200;
static int cfg_verbose;
static int cfg_waittime_ms = 500;
static bool cfg_zerocopy;
static socklen_t cfg_alen;
static struct sockaddr_storage cfg_dst_addr;
static struct sockaddr_storage cfg_src_addr;
static char payload[IP_MAXPACKET];
static long packets, bytes, completions, expected_completions;
static int zerocopied = -1;
static uint32_t next_completion;
static unsigned long gettimeofday_ms(void)
{
struct timeval tv;
gettimeofday(&tv, NULL);
return (tv.tv_sec * 1000) + (tv.tv_usec / 1000);
}
static uint16_t get_ip_csum(const uint16_t *start, int num_words)
{
unsigned long sum = 0;
int i;
for (i = 0; i < num_words; i++)
sum += start[i];
while (sum >> 16)
sum = (sum & 0xFFFF) + (sum >> 16);
return ~sum;
}
static int do_setcpu(int cpu)
{
cpu_set_t mask;
CPU_ZERO(&mask);
CPU_SET(cpu, &mask);
if (sched_setaffinity(0, sizeof(mask), &mask))
fprintf(stderr, "cpu: unable to pin, may increase variance.\n");
else if (cfg_verbose)
fprintf(stderr, "cpu: %u\n", cpu);
return 0;
}
static void do_setsockopt(int fd, int level, int optname, int val)
{
if (setsockopt(fd, level, optname, &val, sizeof(val)))
error(1, errno, "setsockopt %d.%d: %d", level, optname, val);
}
static int do_poll(int fd, int events)
{
struct pollfd pfd;
int ret;
pfd.events = events;
pfd.revents = 0;
pfd.fd = fd;
ret = poll(&pfd, 1, cfg_waittime_ms);
if (ret == -1)
error(1, errno, "poll");
return ret && (pfd.revents & events);
}
static int do_accept(int fd)
{
int fda = fd;
fd = accept(fda, NULL, NULL);
if (fd == -1)
error(1, errno, "accept");
if (close(fda))
error(1, errno, "close listen sock");
return fd;
}
static void add_zcopy_cookie(struct msghdr *msg, uint32_t cookie)
{
struct cmsghdr *cm;
if (!msg->msg_control)
error(1, errno, "NULL cookie");
cm = (void *)msg->msg_control;
cm->cmsg_len = CMSG_LEN(sizeof(cookie));
cm->cmsg_level = SOL_RDS;
cm->cmsg_type = RDS_CMSG_ZCOPY_COOKIE;
memcpy(CMSG_DATA(cm), &cookie, sizeof(cookie));
}
static bool do_sendmsg(int fd, struct msghdr *msg, bool do_zerocopy, int domain)
{
int ret, len, i, flags;
static uint32_t cookie;
char ckbuf[CMSG_SPACE(sizeof(cookie))];
len = 0;
for (i = 0; i < msg->msg_iovlen; i++)
len += msg->msg_iov[i].iov_len;
flags = MSG_DONTWAIT;
if (do_zerocopy) {
flags |= MSG_ZEROCOPY;
if (domain == PF_RDS) {
memset(&msg->msg_control, 0, sizeof(msg->msg_control));
msg->msg_controllen = CMSG_SPACE(sizeof(cookie));
msg->msg_control = (struct cmsghdr *)ckbuf;
add_zcopy_cookie(msg, ++cookie);
}
}
ret = sendmsg(fd, msg, flags);
if (ret == -1 && errno == EAGAIN)
return false;
if (ret == -1)
error(1, errno, "send");
if (cfg_verbose && ret != len)
fprintf(stderr, "send: ret=%u != %u\n", ret, len);
if (len) {
packets++;
bytes += ret;
if (do_zerocopy && ret)
expected_completions++;
}
if (do_zerocopy && domain == PF_RDS) {
msg->msg_control = NULL;
msg->msg_controllen = 0;
}
return true;
}
static void do_sendmsg_corked(int fd, struct msghdr *msg)
{
bool do_zerocopy = cfg_zerocopy;
int i, payload_len, extra_len;
/* split up the packet. for non-multiple, make first buffer longer */
payload_len = cfg_payload_len / cfg_cork;
extra_len = cfg_payload_len - (cfg_cork * payload_len);
do_setsockopt(fd, IPPROTO_UDP, UDP_CORK, 1);
for (i = 0; i < cfg_cork; i++) {
/* in mixed-frags mode, alternate zerocopy and copy frags
* start with non-zerocopy, to ensure attach later works
*/
if (cfg_cork_mixed)
do_zerocopy = (i & 1);
msg->msg_iov[0].iov_len = payload_len + extra_len;
extra_len = 0;
do_sendmsg(fd, msg, do_zerocopy,
(cfg_dst_addr.ss_family == AF_INET ?
PF_INET : PF_INET6));
}
do_setsockopt(fd, IPPROTO_UDP, UDP_CORK, 0);
}
static int setup_iph(struct iphdr *iph, uint16_t payload_len)
{
struct sockaddr_in *daddr = (void *) &cfg_dst_addr;
struct sockaddr_in *saddr = (void *) &cfg_src_addr;
memset(iph, 0, sizeof(*iph));
iph->version = 4;
iph->tos = 0;
iph->ihl = 5;
iph->ttl = 2;
iph->saddr = saddr->sin_addr.s_addr;
iph->daddr = daddr->sin_addr.s_addr;
iph->protocol = IPPROTO_EGP;
iph->tot_len = htons(sizeof(*iph) + payload_len);
iph->check = get_ip_csum((void *) iph, iph->ihl << 1);
return sizeof(*iph);
}
static int setup_ip6h(struct ipv6hdr *ip6h, uint16_t payload_len)
{
struct sockaddr_in6 *daddr = (void *) &cfg_dst_addr;
struct sockaddr_in6 *saddr = (void *) &cfg_src_addr;
memset(ip6h, 0, sizeof(*ip6h));
ip6h->version = 6;
ip6h->payload_len = htons(payload_len);
ip6h->nexthdr = IPPROTO_EGP;
ip6h->hop_limit = 2;
ip6h->saddr = saddr->sin6_addr;
ip6h->daddr = daddr->sin6_addr;
return sizeof(*ip6h);
}
static void setup_sockaddr(int domain, const char *str_addr,
struct sockaddr_storage *sockaddr)
{
struct sockaddr_in6 *addr6 = (void *) sockaddr;
struct sockaddr_in *addr4 = (void *) sockaddr;
switch (domain) {
case PF_INET:
memset(addr4, 0, sizeof(*addr4));
addr4->sin_family = AF_INET;
addr4->sin_port = htons(cfg_port);
if (str_addr &&
inet_pton(AF_INET, str_addr, &(addr4->sin_addr)) != 1)
error(1, 0, "ipv4 parse error: %s", str_addr);
break;
case PF_INET6:
memset(addr6, 0, sizeof(*addr6));
addr6->sin6_family = AF_INET6;
addr6->sin6_port = htons(cfg_port);
if (str_addr &&
inet_pton(AF_INET6, str_addr, &(addr6->sin6_addr)) != 1)
error(1, 0, "ipv6 parse error: %s", str_addr);
break;
default:
error(1, 0, "illegal domain");
}
}
static int do_setup_tx(int domain, int type, int protocol)
{
int fd;
fd = socket(domain, type, protocol);
if (fd == -1)
error(1, errno, "socket t");
do_setsockopt(fd, SOL_SOCKET, SO_SNDBUF, 1 << 21);
if (cfg_zerocopy)
do_setsockopt(fd, SOL_SOCKET, SO_ZEROCOPY, 1);
if (domain != PF_PACKET && domain != PF_RDS)
if (connect(fd, (void *) &cfg_dst_addr, cfg_alen))
error(1, errno, "connect");
if (domain == PF_RDS) {
if (bind(fd, (void *) &cfg_src_addr, cfg_alen))
error(1, errno, "bind");
}
return fd;
}
static uint32_t do_process_zerocopy_cookies(struct rds_zcopy_cookies *ck)
{
int i;
if (ck->num > RDS_MAX_ZCOOKIES)
error(1, 0, "Returned %d cookies, max expected %d\n",
ck->num, RDS_MAX_ZCOOKIES);
for (i = 0; i < ck->num; i++)
if (cfg_verbose >= 2)
fprintf(stderr, "%d\n", ck->cookies[i]);
return ck->num;
}
static bool do_recvmsg_completion(int fd)
{
char cmsgbuf[CMSG_SPACE(sizeof(struct rds_zcopy_cookies))];
struct rds_zcopy_cookies *ck;
struct cmsghdr *cmsg;
struct msghdr msg;
bool ret = false;
memset(&msg, 0, sizeof(msg));
msg.msg_control = cmsgbuf;
msg.msg_controllen = sizeof(cmsgbuf);
if (recvmsg(fd, &msg, MSG_DONTWAIT))
return ret;
if (msg.msg_flags & MSG_CTRUNC)
error(1, errno, "recvmsg notification: truncated");
for (cmsg = CMSG_FIRSTHDR(&msg); cmsg; cmsg = CMSG_NXTHDR(&msg, cmsg)) {
if (cmsg->cmsg_level == SOL_RDS &&
cmsg->cmsg_type == RDS_CMSG_ZCOPY_COMPLETION) {
ck = (struct rds_zcopy_cookies *)CMSG_DATA(cmsg);
completions += do_process_zerocopy_cookies(ck);
ret = true;
break;
}
error(0, 0, "ignoring cmsg at level %d type %d\n",
cmsg->cmsg_level, cmsg->cmsg_type);
}
return ret;
}
static bool do_recv_completion(int fd, int domain)
{
struct sock_extended_err *serr;
struct msghdr msg = {};
struct cmsghdr *cm;
uint32_t hi, lo, range;
int ret, zerocopy;
char control[100];
if (domain == PF_RDS)
return do_recvmsg_completion(fd);
msg.msg_control = control;
msg.msg_controllen = sizeof(control);
ret = recvmsg(fd, &msg, MSG_ERRQUEUE);
if (ret == -1 && errno == EAGAIN)
return false;
if (ret == -1)
error(1, errno, "recvmsg notification");
if (msg.msg_flags & MSG_CTRUNC)
error(1, errno, "recvmsg notification: truncated");
cm = CMSG_FIRSTHDR(&msg);
if (!cm)
error(1, 0, "cmsg: no cmsg");
if (!((cm->cmsg_level == SOL_IP && cm->cmsg_type == IP_RECVERR) ||
(cm->cmsg_level == SOL_IPV6 && cm->cmsg_type == IPV6_RECVERR) ||
(cm->cmsg_level == SOL_PACKET && cm->cmsg_type == PACKET_TX_TIMESTAMP)))
error(1, 0, "serr: wrong type: %d.%d",
cm->cmsg_level, cm->cmsg_type);
serr = (void *) CMSG_DATA(cm);
if (serr->ee_origin != SO_EE_ORIGIN_ZEROCOPY)
error(1, 0, "serr: wrong origin: %u", serr->ee_origin);
if (serr->ee_errno != 0)
error(1, 0, "serr: wrong error code: %u", serr->ee_errno);
hi = serr->ee_data;
lo = serr->ee_info;
range = hi - lo + 1;
/* Detect notification gaps. These should not happen often, if at all.
* Gaps can occur due to drops, reordering and retransmissions.
*/
if (lo != next_completion)
fprintf(stderr, "gap: %u..%u does not append to %u\n",
lo, hi, next_completion);
next_completion = hi + 1;
zerocopy = !(serr->ee_code & SO_EE_CODE_ZEROCOPY_COPIED);
if (zerocopied == -1)
zerocopied = zerocopy;
else if (zerocopied != zerocopy) {
fprintf(stderr, "serr: inconsistent\n");
zerocopied = zerocopy;
}
if (cfg_verbose >= 2)
fprintf(stderr, "completed: %u (h=%u l=%u)\n",
range, hi, lo);
completions += range;
return true;
}
/* Read all outstanding messages on the errqueue */
static void do_recv_completions(int fd, int domain)
{
while (do_recv_completion(fd, domain)) {}
}
/* Wait for all remaining completions on the errqueue */
static void do_recv_remaining_completions(int fd, int domain)
{
int64_t tstop = gettimeofday_ms() + cfg_waittime_ms;
while (completions < expected_completions &&
gettimeofday_ms() < tstop) {
if (do_poll(fd, domain == PF_RDS ? POLLIN : POLLERR))
do_recv_completions(fd, domain);
}
if (completions < expected_completions)
fprintf(stderr, "missing notifications: %lu < %lu\n",
completions, expected_completions);
}
static void do_tx(int domain, int type, int protocol)
{
struct iovec iov[3] = { {0} };
struct sockaddr_ll laddr;
struct msghdr msg = {0};
struct ethhdr eth;
union {
struct ipv6hdr ip6h;
struct iphdr iph;
} nh;
uint64_t tstop;
int fd;
fd = do_setup_tx(domain, type, protocol);
if (domain == PF_PACKET) {
uint16_t proto = cfg_family == PF_INET ? ETH_P_IP : ETH_P_IPV6;
/* sock_raw passes ll header as data */
if (type == SOCK_RAW) {
memset(eth.h_dest, 0x06, ETH_ALEN);
memset(eth.h_source, 0x02, ETH_ALEN);
eth.h_proto = htons(proto);
iov[0].iov_base = ð
iov[0].iov_len = sizeof(eth);
msg.msg_iovlen++;
}
/* both sock_raw and sock_dgram expect name */
memset(&laddr, 0, sizeof(laddr));
laddr.sll_family = AF_PACKET;
laddr.sll_ifindex = cfg_ifindex;
laddr.sll_protocol = htons(proto);
laddr.sll_halen = ETH_ALEN;
memset(laddr.sll_addr, 0x06, ETH_ALEN);
msg.msg_name = &laddr;
msg.msg_namelen = sizeof(laddr);
}
/* packet and raw sockets with hdrincl must pass network header */
if (domain == PF_PACKET || protocol == IPPROTO_RAW) {
if (cfg_family == PF_INET)
iov[1].iov_len = setup_iph(&nh.iph, cfg_payload_len);
else
iov[1].iov_len = setup_ip6h(&nh.ip6h, cfg_payload_len);
iov[1].iov_base = (void *) &nh;
msg.msg_iovlen++;
}
if (domain == PF_RDS) {
msg.msg_name = &cfg_dst_addr;
msg.msg_namelen = (cfg_dst_addr.ss_family == AF_INET ?
sizeof(struct sockaddr_in) :
sizeof(struct sockaddr_in6));
}
iov[2].iov_base = payload;
iov[2].iov_len = cfg_payload_len;
msg.msg_iovlen++;
msg.msg_iov = &iov[3 - msg.msg_iovlen];
tstop = gettimeofday_ms() + cfg_runtime_ms;
do {
if (cfg_cork)
do_sendmsg_corked(fd, &msg);
else
do_sendmsg(fd, &msg, cfg_zerocopy, domain);
while (!do_poll(fd, POLLOUT)) {
if (cfg_zerocopy)
do_recv_completions(fd, domain);
}
} while (gettimeofday_ms() < tstop);
if (cfg_zerocopy)
do_recv_remaining_completions(fd, domain);
if (close(fd))
error(1, errno, "close");
fprintf(stderr, "tx=%lu (%lu MB) txc=%lu zc=%c\n",
packets, bytes >> 20, completions,
zerocopied == 1 ? 'y' : 'n');
}
static int do_setup_rx(int domain, int type, int protocol)
{
int fd;
/* If tx over PF_PACKET, rx over PF_INET(6)/SOCK_RAW,
* to recv the only copy of the packet, not a clone
*/
if (domain == PF_PACKET)
error(1, 0, "Use PF_INET/SOCK_RAW to read");
if (type == SOCK_RAW && protocol == IPPROTO_RAW)
error(1, 0, "IPPROTO_RAW: not supported on Rx");
fd = socket(domain, type, protocol);
if (fd == -1)
error(1, errno, "socket r");
do_setsockopt(fd, SOL_SOCKET, SO_RCVBUF, 1 << 21);
do_setsockopt(fd, SOL_SOCKET, SO_RCVLOWAT, 1 << 16);
do_setsockopt(fd, SOL_SOCKET, SO_REUSEPORT, 1);
if (bind(fd, (void *) &cfg_dst_addr, cfg_alen))
error(1, errno, "bind");
if (type == SOCK_STREAM) {
if (listen(fd, 1))
error(1, errno, "listen");
fd = do_accept(fd);
}
return fd;
}
/* Flush all outstanding bytes for the tcp receive queue */
static void do_flush_tcp(int fd)
{
int ret;
/* MSG_TRUNC flushes up to len bytes */
ret = recv(fd, NULL, 1 << 21, MSG_TRUNC | MSG_DONTWAIT);
if (ret == -1 && errno == EAGAIN)
return;
if (ret == -1)
error(1, errno, "flush");
if (!ret)
return;
packets++;
bytes += ret;
}
/* Flush all outstanding datagrams. Verify first few bytes of each. */
static void do_flush_datagram(int fd, int type)
{
int ret, off = 0;
char buf[64];
/* MSG_TRUNC will return full datagram length */
ret = recv(fd, buf, sizeof(buf), MSG_DONTWAIT | MSG_TRUNC);
if (ret == -1 && errno == EAGAIN)
return;
/* raw ipv4 return with header, raw ipv6 without */
if (cfg_family == PF_INET && type == SOCK_RAW) {
off += sizeof(struct iphdr);
ret -= sizeof(struct iphdr);
}
if (ret == -1)
error(1, errno, "recv");
if (ret != cfg_payload_len)
error(1, 0, "recv: ret=%u != %u", ret, cfg_payload_len);
if (ret > sizeof(buf) - off)
ret = sizeof(buf) - off;
if (memcmp(buf + off, payload, ret))
error(1, 0, "recv: data mismatch");
packets++;
bytes += cfg_payload_len;
}
static void do_rx(int domain, int type, int protocol)
{
const int cfg_receiver_wait_ms = 400;
uint64_t tstop;
int fd;
fd = do_setup_rx(domain, type, protocol);
tstop = gettimeofday_ms() + cfg_runtime_ms + cfg_receiver_wait_ms;
do {
if (type == SOCK_STREAM)
do_flush_tcp(fd);
else
do_flush_datagram(fd, type);
do_poll(fd, POLLIN);
} while (gettimeofday_ms() < tstop);
if (close(fd))
error(1, errno, "close");
fprintf(stderr, "rx=%lu (%lu MB)\n", packets, bytes >> 20);
}
static void do_test(int domain, int type, int protocol)
{
int i;
if (cfg_cork && (domain == PF_PACKET || type != SOCK_DGRAM))
error(1, 0, "can only cork udp sockets");
do_setcpu(cfg_cpu);
for (i = 0; i < IP_MAXPACKET; i++)
payload[i] = 'a' + (i % 26);
if (cfg_rx)
do_rx(domain, type, protocol);
else
do_tx(domain, type, protocol);
}
static void usage(const char *filepath)
{
error(1, 0, "Usage: %s [options] <test>", filepath);
}
static void parse_opts(int argc, char **argv)
{
const int max_payload_len = sizeof(payload) -
sizeof(struct ipv6hdr) -
sizeof(struct tcphdr) -
40 /* max tcp options */;
int c;
char *daddr = NULL, *saddr = NULL;
char *cfg_test;
cfg_payload_len = max_payload_len;
while ((c = getopt(argc, argv, "46c:C:D:i:mp:rs:S:t:vz")) != -1) {
switch (c) {
case '4':
if (cfg_family != PF_UNSPEC)
error(1, 0, "Pass one of -4 or -6");
cfg_family = PF_INET;
cfg_alen = sizeof(struct sockaddr_in);
break;
case '6':
if (cfg_family != PF_UNSPEC)
error(1, 0, "Pass one of -4 or -6");
cfg_family = PF_INET6;
cfg_alen = sizeof(struct sockaddr_in6);
break;
case 'c':
cfg_cork = strtol(optarg, NULL, 0);
break;
case 'C':
cfg_cpu = strtol(optarg, NULL, 0);
break;
case 'D':
daddr = optarg;
break;
case 'i':
cfg_ifindex = if_nametoindex(optarg);
if (cfg_ifindex == 0)
error(1, errno, "invalid iface: %s", optarg);
break;
case 'm':
cfg_cork_mixed = true;
break;
case 'p':
cfg_port = strtoul(optarg, NULL, 0);
break;
case 'r':
cfg_rx = true;
break;
case 's':
cfg_payload_len = strtoul(optarg, NULL, 0);
break;
case 'S':
saddr = optarg;
break;
case 't':
cfg_runtime_ms = 200 + strtoul(optarg, NULL, 10) * 1000;
break;
case 'v':
cfg_verbose++;
break;
case 'z':
cfg_zerocopy = true;
break;
}
}
cfg_test = argv[argc - 1];
if (strcmp(cfg_test, "rds") == 0) {
if (!daddr)
error(1, 0, "-D <server addr> required for PF_RDS\n");
if (!cfg_rx && !saddr)
error(1, 0, "-S <client addr> required for PF_RDS\n");
}
setup_sockaddr(cfg_family, daddr, &cfg_dst_addr);
setup_sockaddr(cfg_family, saddr, &cfg_src_addr);
if (cfg_payload_len > max_payload_len)
error(1, 0, "-s: payload exceeds max (%d)", max_payload_len);
if (cfg_cork_mixed && (!cfg_zerocopy || !cfg_cork))
error(1, 0, "-m: cork_mixed requires corking and zerocopy");
if (optind != argc - 1)
usage(argv[0]);
}
int main(int argc, char **argv)
{
const char *cfg_test;
parse_opts(argc, argv);
cfg_test = argv[argc - 1];
if (!strcmp(cfg_test, "packet"))
do_test(PF_PACKET, SOCK_RAW, 0);
else if (!strcmp(cfg_test, "packet_dgram"))
do_test(PF_PACKET, SOCK_DGRAM, 0);
else if (!strcmp(cfg_test, "raw"))
do_test(cfg_family, SOCK_RAW, IPPROTO_EGP);
else if (!strcmp(cfg_test, "raw_hdrincl"))
do_test(cfg_family, SOCK_RAW, IPPROTO_RAW);
else if (!strcmp(cfg_test, "tcp"))
do_test(cfg_family, SOCK_STREAM, 0);
else if (!strcmp(cfg_test, "udp"))
do_test(cfg_family, SOCK_DGRAM, 0);
else if (!strcmp(cfg_test, "rds"))
do_test(PF_RDS, SOCK_SEQPACKET, 0);
else
error(1, 0, "unknown cfg_test %s", cfg_test);
return 0;
}
| linux-master | tools/testing/selftests/net/msg_zerocopy.c |
// SPDX-License-Identifier: GPL-2.0
#define _GNU_SOURCE
#include <arpa/inet.h>
#include <errno.h>
#include <error.h>
#include <linux/in.h>
#include <netinet/ip.h>
#include <netinet/ip6.h>
#include <netinet/udp.h>
#include <stdbool.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <time.h>
#include <unistd.h>
static bool cfg_do_ipv4;
static bool cfg_do_ipv6;
static bool cfg_verbose;
static bool cfg_overlap;
static bool cfg_permissive;
static unsigned short cfg_port = 9000;
const struct in_addr addr4 = { .s_addr = __constant_htonl(INADDR_LOOPBACK + 2) };
const struct in6_addr addr6 = IN6ADDR_LOOPBACK_INIT;
#define IP4_HLEN (sizeof(struct iphdr))
#define IP6_HLEN (sizeof(struct ip6_hdr))
#define UDP_HLEN (sizeof(struct udphdr))
/* IPv6 fragment header lenth. */
#define FRAG_HLEN 8
static int payload_len;
static int max_frag_len;
#define MSG_LEN_MAX 10000 /* Max UDP payload length. */
#define IP4_MF (1u << 13) /* IPv4 MF flag. */
#define IP6_MF (1) /* IPv6 MF flag. */
#define CSUM_MANGLED_0 (0xffff)
static uint8_t udp_payload[MSG_LEN_MAX];
static uint8_t ip_frame[IP_MAXPACKET];
static uint32_t ip_id = 0xabcd;
static int msg_counter;
static int frag_counter;
static unsigned int seed;
/* Receive a UDP packet. Validate it matches udp_payload. */
static void recv_validate_udp(int fd_udp)
{
ssize_t ret;
static uint8_t recv_buff[MSG_LEN_MAX];
ret = recv(fd_udp, recv_buff, payload_len, 0);
msg_counter++;
if (cfg_overlap) {
if (ret == -1 && (errno == ETIMEDOUT || errno == EAGAIN))
return; /* OK */
if (!cfg_permissive) {
if (ret != -1)
error(1, 0, "recv: expected timeout; got %d",
(int)ret);
error(1, errno, "recv: expected timeout: %d", errno);
}
}
if (ret == -1)
error(1, errno, "recv: payload_len = %d max_frag_len = %d",
payload_len, max_frag_len);
if (ret != payload_len)
error(1, 0, "recv: wrong size: %d vs %d", (int)ret, payload_len);
if (memcmp(udp_payload, recv_buff, payload_len))
error(1, 0, "recv: wrong data");
}
static uint32_t raw_checksum(uint8_t *buf, int len, uint32_t sum)
{
int i;
for (i = 0; i < (len & ~1U); i += 2) {
sum += (u_int16_t)ntohs(*((u_int16_t *)(buf + i)));
if (sum > 0xffff)
sum -= 0xffff;
}
if (i < len) {
sum += buf[i] << 8;
if (sum > 0xffff)
sum -= 0xffff;
}
return sum;
}
static uint16_t udp_checksum(struct ip *iphdr, struct udphdr *udphdr)
{
uint32_t sum = 0;
uint16_t res;
sum = raw_checksum((uint8_t *)&iphdr->ip_src, 2 * sizeof(iphdr->ip_src),
IPPROTO_UDP + (uint32_t)(UDP_HLEN + payload_len));
sum = raw_checksum((uint8_t *)udphdr, UDP_HLEN, sum);
sum = raw_checksum((uint8_t *)udp_payload, payload_len, sum);
res = 0xffff & ~sum;
if (res)
return htons(res);
else
return CSUM_MANGLED_0;
}
static uint16_t udp6_checksum(struct ip6_hdr *iphdr, struct udphdr *udphdr)
{
uint32_t sum = 0;
uint16_t res;
sum = raw_checksum((uint8_t *)&iphdr->ip6_src, 2 * sizeof(iphdr->ip6_src),
IPPROTO_UDP);
sum = raw_checksum((uint8_t *)&udphdr->len, sizeof(udphdr->len), sum);
sum = raw_checksum((uint8_t *)udphdr, UDP_HLEN, sum);
sum = raw_checksum((uint8_t *)udp_payload, payload_len, sum);
res = 0xffff & ~sum;
if (res)
return htons(res);
else
return CSUM_MANGLED_0;
}
static void send_fragment(int fd_raw, struct sockaddr *addr, socklen_t alen,
int offset, bool ipv6)
{
int frag_len;
int res;
int payload_offset = offset > 0 ? offset - UDP_HLEN : 0;
uint8_t *frag_start = ipv6 ? ip_frame + IP6_HLEN + FRAG_HLEN :
ip_frame + IP4_HLEN;
if (offset == 0) {
struct udphdr udphdr;
udphdr.source = htons(cfg_port + 1);
udphdr.dest = htons(cfg_port);
udphdr.len = htons(UDP_HLEN + payload_len);
udphdr.check = 0;
if (ipv6)
udphdr.check = udp6_checksum((struct ip6_hdr *)ip_frame, &udphdr);
else
udphdr.check = udp_checksum((struct ip *)ip_frame, &udphdr);
memcpy(frag_start, &udphdr, UDP_HLEN);
}
if (ipv6) {
struct ip6_hdr *ip6hdr = (struct ip6_hdr *)ip_frame;
struct ip6_frag *fraghdr = (struct ip6_frag *)(ip_frame + IP6_HLEN);
if (payload_len - payload_offset <= max_frag_len && offset > 0) {
/* This is the last fragment. */
frag_len = FRAG_HLEN + payload_len - payload_offset;
fraghdr->ip6f_offlg = htons(offset);
} else {
frag_len = FRAG_HLEN + max_frag_len;
fraghdr->ip6f_offlg = htons(offset | IP6_MF);
}
ip6hdr->ip6_plen = htons(frag_len);
if (offset == 0)
memcpy(frag_start + UDP_HLEN, udp_payload,
frag_len - FRAG_HLEN - UDP_HLEN);
else
memcpy(frag_start, udp_payload + payload_offset,
frag_len - FRAG_HLEN);
frag_len += IP6_HLEN;
} else {
struct ip *iphdr = (struct ip *)ip_frame;
if (payload_len - payload_offset <= max_frag_len && offset > 0) {
/* This is the last fragment. */
frag_len = IP4_HLEN + payload_len - payload_offset;
iphdr->ip_off = htons(offset / 8);
} else {
frag_len = IP4_HLEN + max_frag_len;
iphdr->ip_off = htons(offset / 8 | IP4_MF);
}
iphdr->ip_len = htons(frag_len);
if (offset == 0)
memcpy(frag_start + UDP_HLEN, udp_payload,
frag_len - IP4_HLEN - UDP_HLEN);
else
memcpy(frag_start, udp_payload + payload_offset,
frag_len - IP4_HLEN);
}
res = sendto(fd_raw, ip_frame, frag_len, 0, addr, alen);
if (res < 0 && errno != EPERM)
error(1, errno, "send_fragment");
if (res >= 0 && res != frag_len)
error(1, 0, "send_fragment: %d vs %d", res, frag_len);
frag_counter++;
}
static void send_udp_frags(int fd_raw, struct sockaddr *addr,
socklen_t alen, bool ipv6)
{
struct ip *iphdr = (struct ip *)ip_frame;
struct ip6_hdr *ip6hdr = (struct ip6_hdr *)ip_frame;
int res;
int offset;
int frag_len;
/* Send the UDP datagram using raw IP fragments: the 0th fragment
* has the UDP header; other fragments are pieces of udp_payload
* split in chunks of frag_len size.
*
* Odd fragments (1st, 3rd, 5th, etc.) are sent out first, then
* even fragments (0th, 2nd, etc.) are sent out.
*/
if (ipv6) {
struct ip6_frag *fraghdr = (struct ip6_frag *)(ip_frame + IP6_HLEN);
((struct sockaddr_in6 *)addr)->sin6_port = 0;
memset(ip6hdr, 0, sizeof(*ip6hdr));
ip6hdr->ip6_flow = htonl(6<<28); /* Version. */
ip6hdr->ip6_nxt = IPPROTO_FRAGMENT;
ip6hdr->ip6_hops = 255;
ip6hdr->ip6_src = addr6;
ip6hdr->ip6_dst = addr6;
fraghdr->ip6f_nxt = IPPROTO_UDP;
fraghdr->ip6f_reserved = 0;
fraghdr->ip6f_ident = htonl(ip_id++);
} else {
memset(iphdr, 0, sizeof(*iphdr));
iphdr->ip_hl = 5;
iphdr->ip_v = 4;
iphdr->ip_tos = 0;
iphdr->ip_id = htons(ip_id++);
iphdr->ip_ttl = 0x40;
iphdr->ip_p = IPPROTO_UDP;
iphdr->ip_src.s_addr = htonl(INADDR_LOOPBACK);
iphdr->ip_dst = addr4;
iphdr->ip_sum = 0;
}
/* Occasionally test in-order fragments. */
if (!cfg_overlap && (rand() % 100 < 15)) {
offset = 0;
while (offset < (UDP_HLEN + payload_len)) {
send_fragment(fd_raw, addr, alen, offset, ipv6);
offset += max_frag_len;
}
return;
}
/* Occasionally test IPv4 "runs" (see net/ipv4/ip_fragment.c) */
if (!cfg_overlap && (rand() % 100 < 20) &&
(payload_len > 9 * max_frag_len)) {
offset = 6 * max_frag_len;
while (offset < (UDP_HLEN + payload_len)) {
send_fragment(fd_raw, addr, alen, offset, ipv6);
offset += max_frag_len;
}
offset = 3 * max_frag_len;
while (offset < 6 * max_frag_len) {
send_fragment(fd_raw, addr, alen, offset, ipv6);
offset += max_frag_len;
}
offset = 0;
while (offset < 3 * max_frag_len) {
send_fragment(fd_raw, addr, alen, offset, ipv6);
offset += max_frag_len;
}
return;
}
/* Odd fragments. */
offset = max_frag_len;
while (offset < (UDP_HLEN + payload_len)) {
send_fragment(fd_raw, addr, alen, offset, ipv6);
/* IPv4 ignores duplicates, so randomly send a duplicate. */
if (rand() % 100 == 1)
send_fragment(fd_raw, addr, alen, offset, ipv6);
offset += 2 * max_frag_len;
}
if (cfg_overlap) {
/* Send an extra random fragment.
*
* Duplicates and some fragments completely inside
* previously sent fragments are dropped/ignored. So
* random offset and frag_len can result in a dropped
* fragment instead of a dropped queue/packet. Thus we
* hard-code offset and frag_len.
*/
if (max_frag_len * 4 < payload_len || max_frag_len < 16) {
/* not enough payload for random offset and frag_len. */
offset = 8;
frag_len = UDP_HLEN + max_frag_len;
} else {
offset = rand() % (payload_len / 2);
frag_len = 2 * max_frag_len + 1 + rand() % 256;
}
if (ipv6) {
struct ip6_frag *fraghdr = (struct ip6_frag *)(ip_frame + IP6_HLEN);
/* sendto() returns EINVAL if offset + frag_len is too small. */
/* In IPv6 if !!(frag_len % 8), the fragment is dropped. */
frag_len &= ~0x7;
fraghdr->ip6f_offlg = htons(offset / 8 | IP6_MF);
ip6hdr->ip6_plen = htons(frag_len);
frag_len += IP6_HLEN;
} else {
frag_len += IP4_HLEN;
iphdr->ip_off = htons(offset / 8 | IP4_MF);
iphdr->ip_len = htons(frag_len);
}
res = sendto(fd_raw, ip_frame, frag_len, 0, addr, alen);
if (res < 0 && errno != EPERM)
error(1, errno, "sendto overlap: %d", frag_len);
if (res >= 0 && res != frag_len)
error(1, 0, "sendto overlap: %d vs %d", (int)res, frag_len);
frag_counter++;
}
/* Event fragments. */
offset = 0;
while (offset < (UDP_HLEN + payload_len)) {
send_fragment(fd_raw, addr, alen, offset, ipv6);
/* IPv4 ignores duplicates, so randomly send a duplicate. */
if (rand() % 100 == 1)
send_fragment(fd_raw, addr, alen, offset, ipv6);
offset += 2 * max_frag_len;
}
}
static void run_test(struct sockaddr *addr, socklen_t alen, bool ipv6)
{
int fd_tx_raw, fd_rx_udp;
/* Frag queue timeout is set to one second in the calling script;
* socket timeout should be just a bit longer to avoid tests interfering
* with each other.
*/
struct timeval tv = { .tv_sec = 1, .tv_usec = 10 };
int idx;
int min_frag_len = 8;
/* Initialize the payload. */
for (idx = 0; idx < MSG_LEN_MAX; ++idx)
udp_payload[idx] = idx % 256;
/* Open sockets. */
fd_tx_raw = socket(addr->sa_family, SOCK_RAW, IPPROTO_RAW);
if (fd_tx_raw == -1)
error(1, errno, "socket tx_raw");
fd_rx_udp = socket(addr->sa_family, SOCK_DGRAM, 0);
if (fd_rx_udp == -1)
error(1, errno, "socket rx_udp");
if (bind(fd_rx_udp, addr, alen))
error(1, errno, "bind");
/* Fail fast. */
if (setsockopt(fd_rx_udp, SOL_SOCKET, SO_RCVTIMEO, &tv, sizeof(tv)))
error(1, errno, "setsockopt rcv timeout");
for (payload_len = min_frag_len; payload_len < MSG_LEN_MAX;
payload_len += (rand() % 4096)) {
if (cfg_verbose)
printf("payload_len: %d\n", payload_len);
if (cfg_overlap) {
/* With overlaps, one send/receive pair below takes
* at least one second (== timeout) to run, so there
* is not enough test time to run a nested loop:
* the full overlap test takes 20-30 seconds.
*/
max_frag_len = min_frag_len +
rand() % (1500 - FRAG_HLEN - min_frag_len);
send_udp_frags(fd_tx_raw, addr, alen, ipv6);
recv_validate_udp(fd_rx_udp);
} else {
/* Without overlaps, each packet reassembly (== one
* send/receive pair below) takes very little time to
* run, so we can easily afford more thourough testing
* with a nested loop: the full non-overlap test takes
* less than one second).
*/
max_frag_len = min_frag_len;
do {
send_udp_frags(fd_tx_raw, addr, alen, ipv6);
recv_validate_udp(fd_rx_udp);
max_frag_len += 8 * (rand() % 8);
} while (max_frag_len < (1500 - FRAG_HLEN) &&
max_frag_len <= payload_len);
}
}
/* Cleanup. */
if (close(fd_tx_raw))
error(1, errno, "close tx_raw");
if (close(fd_rx_udp))
error(1, errno, "close rx_udp");
if (cfg_verbose)
printf("processed %d messages, %d fragments\n",
msg_counter, frag_counter);
fprintf(stderr, "PASS\n");
}
static void run_test_v4(void)
{
struct sockaddr_in addr = {0};
addr.sin_family = AF_INET;
addr.sin_port = htons(cfg_port);
addr.sin_addr = addr4;
run_test((void *)&addr, sizeof(addr), false /* !ipv6 */);
}
static void run_test_v6(void)
{
struct sockaddr_in6 addr = {0};
addr.sin6_family = AF_INET6;
addr.sin6_port = htons(cfg_port);
addr.sin6_addr = addr6;
run_test((void *)&addr, sizeof(addr), true /* ipv6 */);
}
static void parse_opts(int argc, char **argv)
{
int c;
while ((c = getopt(argc, argv, "46opv")) != -1) {
switch (c) {
case '4':
cfg_do_ipv4 = true;
break;
case '6':
cfg_do_ipv6 = true;
break;
case 'o':
cfg_overlap = true;
break;
case 'p':
cfg_permissive = true;
break;
case 'v':
cfg_verbose = true;
break;
default:
error(1, 0, "%s: parse error", argv[0]);
}
}
}
int main(int argc, char **argv)
{
parse_opts(argc, argv);
seed = time(NULL);
srand(seed);
/* Print the seed to track/reproduce potential failures. */
printf("seed = %d\n", seed);
if (cfg_do_ipv4)
run_test_v4();
if (cfg_do_ipv6)
run_test_v6();
return 0;
}
| linux-master | tools/testing/selftests/net/ip_defrag.c |
// SPDX-License-Identifier: GPL-2.0
#define _GNU_SOURCE
#include <arpa/inet.h>
#include <errno.h>
#include <error.h>
#include <fcntl.h>
#include <limits.h>
#include <linux/filter.h>
#include <linux/bpf.h>
#include <linux/if_packet.h>
#include <linux/if_vlan.h>
#include <linux/virtio_net.h>
#include <net/if.h>
#include <net/ethernet.h>
#include <netinet/ip.h>
#include <netinet/udp.h>
#include <poll.h>
#include <sched.h>
#include <stdbool.h>
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/mman.h>
#include <sys/socket.h>
#include <sys/stat.h>
#include <sys/types.h>
#include <unistd.h>
#include "psock_lib.h"
static bool cfg_use_bind;
static bool cfg_use_csum_off;
static bool cfg_use_csum_off_bad;
static bool cfg_use_dgram;
static bool cfg_use_gso;
static bool cfg_use_qdisc_bypass;
static bool cfg_use_vlan;
static bool cfg_use_vnet;
static char *cfg_ifname = "lo";
static int cfg_mtu = 1500;
static int cfg_payload_len = DATA_LEN;
static int cfg_truncate_len = INT_MAX;
static uint16_t cfg_port = 8000;
/* test sending up to max mtu + 1 */
#define TEST_SZ (sizeof(struct virtio_net_hdr) + ETH_HLEN + ETH_MAX_MTU + 1)
static char tbuf[TEST_SZ], rbuf[TEST_SZ];
static unsigned long add_csum_hword(const uint16_t *start, int num_u16)
{
unsigned long sum = 0;
int i;
for (i = 0; i < num_u16; i++)
sum += start[i];
return sum;
}
static uint16_t build_ip_csum(const uint16_t *start, int num_u16,
unsigned long sum)
{
sum += add_csum_hword(start, num_u16);
while (sum >> 16)
sum = (sum & 0xffff) + (sum >> 16);
return ~sum;
}
static int build_vnet_header(void *header)
{
struct virtio_net_hdr *vh = header;
vh->hdr_len = ETH_HLEN + sizeof(struct iphdr) + sizeof(struct udphdr);
if (cfg_use_csum_off) {
vh->flags |= VIRTIO_NET_HDR_F_NEEDS_CSUM;
vh->csum_start = ETH_HLEN + sizeof(struct iphdr);
vh->csum_offset = __builtin_offsetof(struct udphdr, check);
/* position check field exactly one byte beyond end of packet */
if (cfg_use_csum_off_bad)
vh->csum_start += sizeof(struct udphdr) + cfg_payload_len -
vh->csum_offset - 1;
}
if (cfg_use_gso) {
vh->gso_type = VIRTIO_NET_HDR_GSO_UDP;
vh->gso_size = cfg_mtu - sizeof(struct iphdr);
}
return sizeof(*vh);
}
static int build_eth_header(void *header)
{
struct ethhdr *eth = header;
if (cfg_use_vlan) {
uint16_t *tag = header + ETH_HLEN;
eth->h_proto = htons(ETH_P_8021Q);
tag[1] = htons(ETH_P_IP);
return ETH_HLEN + 4;
}
eth->h_proto = htons(ETH_P_IP);
return ETH_HLEN;
}
static int build_ipv4_header(void *header, int payload_len)
{
struct iphdr *iph = header;
iph->ihl = 5;
iph->version = 4;
iph->ttl = 8;
iph->tot_len = htons(sizeof(*iph) + sizeof(struct udphdr) + payload_len);
iph->id = htons(1337);
iph->protocol = IPPROTO_UDP;
iph->saddr = htonl((172 << 24) | (17 << 16) | 2);
iph->daddr = htonl((172 << 24) | (17 << 16) | 1);
iph->check = build_ip_csum((void *) iph, iph->ihl << 1, 0);
return iph->ihl << 2;
}
static int build_udp_header(void *header, int payload_len)
{
const int alen = sizeof(uint32_t);
struct udphdr *udph = header;
int len = sizeof(*udph) + payload_len;
udph->source = htons(9);
udph->dest = htons(cfg_port);
udph->len = htons(len);
if (cfg_use_csum_off)
udph->check = build_ip_csum(header - (2 * alen), alen,
htons(IPPROTO_UDP) + udph->len);
else
udph->check = 0;
return sizeof(*udph);
}
static int build_packet(int payload_len)
{
int off = 0;
off += build_vnet_header(tbuf);
off += build_eth_header(tbuf + off);
off += build_ipv4_header(tbuf + off, payload_len);
off += build_udp_header(tbuf + off, payload_len);
if (off + payload_len > sizeof(tbuf))
error(1, 0, "payload length exceeds max");
memset(tbuf + off, DATA_CHAR, payload_len);
return off + payload_len;
}
static void do_bind(int fd)
{
struct sockaddr_ll laddr = {0};
laddr.sll_family = AF_PACKET;
laddr.sll_protocol = htons(ETH_P_IP);
laddr.sll_ifindex = if_nametoindex(cfg_ifname);
if (!laddr.sll_ifindex)
error(1, errno, "if_nametoindex");
if (bind(fd, (void *)&laddr, sizeof(laddr)))
error(1, errno, "bind");
}
static void do_send(int fd, char *buf, int len)
{
int ret;
if (!cfg_use_vnet) {
buf += sizeof(struct virtio_net_hdr);
len -= sizeof(struct virtio_net_hdr);
}
if (cfg_use_dgram) {
buf += ETH_HLEN;
len -= ETH_HLEN;
}
if (cfg_use_bind) {
ret = write(fd, buf, len);
} else {
struct sockaddr_ll laddr = {0};
laddr.sll_protocol = htons(ETH_P_IP);
laddr.sll_ifindex = if_nametoindex(cfg_ifname);
if (!laddr.sll_ifindex)
error(1, errno, "if_nametoindex");
ret = sendto(fd, buf, len, 0, (void *)&laddr, sizeof(laddr));
}
if (ret == -1)
error(1, errno, "write");
if (ret != len)
error(1, 0, "write: %u %u", ret, len);
fprintf(stderr, "tx: %u\n", ret);
}
static int do_tx(void)
{
const int one = 1;
int fd, len;
fd = socket(PF_PACKET, cfg_use_dgram ? SOCK_DGRAM : SOCK_RAW, 0);
if (fd == -1)
error(1, errno, "socket t");
if (cfg_use_bind)
do_bind(fd);
if (cfg_use_qdisc_bypass &&
setsockopt(fd, SOL_PACKET, PACKET_QDISC_BYPASS, &one, sizeof(one)))
error(1, errno, "setsockopt qdisc bypass");
if (cfg_use_vnet &&
setsockopt(fd, SOL_PACKET, PACKET_VNET_HDR, &one, sizeof(one)))
error(1, errno, "setsockopt vnet");
len = build_packet(cfg_payload_len);
if (cfg_truncate_len < len)
len = cfg_truncate_len;
do_send(fd, tbuf, len);
if (close(fd))
error(1, errno, "close t");
return len;
}
static int setup_rx(void)
{
struct timeval tv = { .tv_usec = 100 * 1000 };
struct sockaddr_in raddr = {0};
int fd;
fd = socket(PF_INET, SOCK_DGRAM, 0);
if (fd == -1)
error(1, errno, "socket r");
if (setsockopt(fd, SOL_SOCKET, SO_RCVTIMEO, &tv, sizeof(tv)))
error(1, errno, "setsockopt rcv timeout");
raddr.sin_family = AF_INET;
raddr.sin_port = htons(cfg_port);
raddr.sin_addr.s_addr = htonl(INADDR_ANY);
if (bind(fd, (void *)&raddr, sizeof(raddr)))
error(1, errno, "bind r");
return fd;
}
static void do_rx(int fd, int expected_len, char *expected)
{
int ret;
ret = recv(fd, rbuf, sizeof(rbuf), 0);
if (ret == -1)
error(1, errno, "recv");
if (ret != expected_len)
error(1, 0, "recv: %u != %u", ret, expected_len);
if (memcmp(rbuf, expected, ret))
error(1, 0, "recv: data mismatch");
fprintf(stderr, "rx: %u\n", ret);
}
static int setup_sniffer(void)
{
struct timeval tv = { .tv_usec = 100 * 1000 };
int fd;
fd = socket(PF_PACKET, SOCK_RAW, 0);
if (fd == -1)
error(1, errno, "socket p");
if (setsockopt(fd, SOL_SOCKET, SO_RCVTIMEO, &tv, sizeof(tv)))
error(1, errno, "setsockopt rcv timeout");
pair_udp_setfilter(fd);
do_bind(fd);
return fd;
}
static void parse_opts(int argc, char **argv)
{
int c;
while ((c = getopt(argc, argv, "bcCdgl:qt:vV")) != -1) {
switch (c) {
case 'b':
cfg_use_bind = true;
break;
case 'c':
cfg_use_csum_off = true;
break;
case 'C':
cfg_use_csum_off_bad = true;
break;
case 'd':
cfg_use_dgram = true;
break;
case 'g':
cfg_use_gso = true;
break;
case 'l':
cfg_payload_len = strtoul(optarg, NULL, 0);
break;
case 'q':
cfg_use_qdisc_bypass = true;
break;
case 't':
cfg_truncate_len = strtoul(optarg, NULL, 0);
break;
case 'v':
cfg_use_vnet = true;
break;
case 'V':
cfg_use_vlan = true;
break;
default:
error(1, 0, "%s: parse error", argv[0]);
}
}
if (cfg_use_vlan && cfg_use_dgram)
error(1, 0, "option vlan (-V) conflicts with dgram (-d)");
if (cfg_use_csum_off && !cfg_use_vnet)
error(1, 0, "option csum offload (-c) requires vnet (-v)");
if (cfg_use_csum_off_bad && !cfg_use_csum_off)
error(1, 0, "option csum bad (-C) requires csum offload (-c)");
if (cfg_use_gso && !cfg_use_csum_off)
error(1, 0, "option gso (-g) requires csum offload (-c)");
}
static void run_test(void)
{
int fdr, fds, total_len;
fdr = setup_rx();
fds = setup_sniffer();
total_len = do_tx();
/* BPF filter accepts only this length, vlan changes MAC */
if (cfg_payload_len == DATA_LEN && !cfg_use_vlan)
do_rx(fds, total_len - sizeof(struct virtio_net_hdr),
tbuf + sizeof(struct virtio_net_hdr));
do_rx(fdr, cfg_payload_len, tbuf + total_len - cfg_payload_len);
if (close(fds))
error(1, errno, "close s");
if (close(fdr))
error(1, errno, "close r");
}
int main(int argc, char **argv)
{
parse_opts(argc, argv);
if (system("ip link set dev lo mtu 1500"))
error(1, errno, "ip link set mtu");
if (system("ip addr add dev lo 172.17.0.1/24"))
error(1, errno, "ip addr add");
if (system("sysctl -w net.ipv4.conf.lo.accept_local=1"))
error(1, errno, "sysctl lo.accept_local");
run_test();
fprintf(stderr, "OK\n\n");
return 0;
}
| linux-master | tools/testing/selftests/net/psock_snd.c |
// SPDX-License-Identifier: GPL-2.0-or-later
#include <errno.h>
#include <error.h>
#include <netdb.h>
#include <stdbool.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <time.h>
#include <unistd.h>
#include <linux/errqueue.h>
#include <linux/icmp.h>
#include <linux/icmpv6.h>
#include <linux/net_tstamp.h>
#include <linux/types.h>
#include <linux/udp.h>
#include <sys/socket.h>
#include "../kselftest.h"
enum {
ERN_SUCCESS = 0,
/* Well defined errors, callers may depend on these */
ERN_SEND = 1,
/* Informational, can reorder */
ERN_HELP,
ERN_SEND_SHORT,
ERN_SOCK_CREATE,
ERN_RESOLVE,
ERN_CMSG_WR,
ERN_SOCKOPT,
ERN_GETTIME,
ERN_RECVERR,
ERN_CMSG_RD,
ERN_CMSG_RCV,
};
struct option_cmsg_u32 {
bool ena;
unsigned int val;
};
struct options {
bool silent_send;
const char *host;
const char *service;
unsigned int size;
struct {
unsigned int mark;
unsigned int dontfrag;
unsigned int tclass;
unsigned int hlimit;
} sockopt;
struct {
unsigned int family;
unsigned int type;
unsigned int proto;
} sock;
struct option_cmsg_u32 mark;
struct {
bool ena;
unsigned int delay;
} txtime;
struct {
bool ena;
} ts;
struct {
struct option_cmsg_u32 dontfrag;
struct option_cmsg_u32 tclass;
struct option_cmsg_u32 hlimit;
struct option_cmsg_u32 exthdr;
} v6;
} opt = {
.size = 13,
.sock = {
.family = AF_UNSPEC,
.type = SOCK_DGRAM,
.proto = IPPROTO_UDP,
},
};
static struct timespec time_start_real;
static struct timespec time_start_mono;
static void __attribute__((noreturn)) cs_usage(const char *bin)
{
printf("Usage: %s [opts] <dst host> <dst port / service>\n", bin);
printf("Options:\n"
"\t\t-s Silent send() failures\n"
"\t\t-S send() size\n"
"\t\t-4/-6 Force IPv4 / IPv6 only\n"
"\t\t-p prot Socket protocol\n"
"\t\t (u = UDP (default); i = ICMP; r = RAW)\n"
"\n"
"\t\t-m val Set SO_MARK with given value\n"
"\t\t-M val Set SO_MARK via setsockopt\n"
"\t\t-d val Set SO_TXTIME with given delay (usec)\n"
"\t\t-t Enable time stamp reporting\n"
"\t\t-f val Set don't fragment via cmsg\n"
"\t\t-F val Set don't fragment via setsockopt\n"
"\t\t-c val Set TCLASS via cmsg\n"
"\t\t-C val Set TCLASS via setsockopt\n"
"\t\t-l val Set HOPLIMIT via cmsg\n"
"\t\t-L val Set HOPLIMIT via setsockopt\n"
"\t\t-H type Add an IPv6 header option\n"
"\t\t (h = HOP; d = DST; r = RTDST)"
"");
exit(ERN_HELP);
}
static void cs_parse_args(int argc, char *argv[])
{
int o;
while ((o = getopt(argc, argv, "46sS:p:m:M:d:tf:F:c:C:l:L:H:")) != -1) {
switch (o) {
case 's':
opt.silent_send = true;
break;
case 'S':
opt.size = atoi(optarg);
break;
case '4':
opt.sock.family = AF_INET;
break;
case '6':
opt.sock.family = AF_INET6;
break;
case 'p':
if (*optarg == 'u' || *optarg == 'U') {
opt.sock.proto = IPPROTO_UDP;
} else if (*optarg == 'i' || *optarg == 'I') {
opt.sock.proto = IPPROTO_ICMP;
} else if (*optarg == 'r') {
opt.sock.type = SOCK_RAW;
} else {
printf("Error: unknown protocol: %s\n", optarg);
cs_usage(argv[0]);
}
break;
case 'm':
opt.mark.ena = true;
opt.mark.val = atoi(optarg);
break;
case 'M':
opt.sockopt.mark = atoi(optarg);
break;
case 'd':
opt.txtime.ena = true;
opt.txtime.delay = atoi(optarg);
break;
case 't':
opt.ts.ena = true;
break;
case 'f':
opt.v6.dontfrag.ena = true;
opt.v6.dontfrag.val = atoi(optarg);
break;
case 'F':
opt.sockopt.dontfrag = atoi(optarg);
break;
case 'c':
opt.v6.tclass.ena = true;
opt.v6.tclass.val = atoi(optarg);
break;
case 'C':
opt.sockopt.tclass = atoi(optarg);
break;
case 'l':
opt.v6.hlimit.ena = true;
opt.v6.hlimit.val = atoi(optarg);
break;
case 'L':
opt.sockopt.hlimit = atoi(optarg);
break;
case 'H':
opt.v6.exthdr.ena = true;
switch (optarg[0]) {
case 'h':
opt.v6.exthdr.val = IPV6_HOPOPTS;
break;
case 'd':
opt.v6.exthdr.val = IPV6_DSTOPTS;
break;
case 'r':
opt.v6.exthdr.val = IPV6_RTHDRDSTOPTS;
break;
default:
printf("Error: hdr type: %s\n", optarg);
break;
}
break;
}
}
if (optind != argc - 2)
cs_usage(argv[0]);
opt.host = argv[optind];
opt.service = argv[optind + 1];
}
static void memrnd(void *s, size_t n)
{
int *dword = s;
char *byte;
for (; n >= 4; n -= 4)
*dword++ = rand();
byte = (void *)dword;
while (n--)
*byte++ = rand();
}
static void
ca_write_cmsg_u32(char *cbuf, size_t cbuf_sz, size_t *cmsg_len,
int level, int optname, struct option_cmsg_u32 *uopt)
{
struct cmsghdr *cmsg;
if (!uopt->ena)
return;
cmsg = (struct cmsghdr *)(cbuf + *cmsg_len);
*cmsg_len += CMSG_SPACE(sizeof(__u32));
if (cbuf_sz < *cmsg_len)
error(ERN_CMSG_WR, EFAULT, "cmsg buffer too small");
cmsg->cmsg_level = level;
cmsg->cmsg_type = optname;
cmsg->cmsg_len = CMSG_LEN(sizeof(__u32));
*(__u32 *)CMSG_DATA(cmsg) = uopt->val;
}
static void
cs_write_cmsg(int fd, struct msghdr *msg, char *cbuf, size_t cbuf_sz)
{
struct cmsghdr *cmsg;
size_t cmsg_len;
msg->msg_control = cbuf;
cmsg_len = 0;
ca_write_cmsg_u32(cbuf, cbuf_sz, &cmsg_len,
SOL_SOCKET, SO_MARK, &opt.mark);
ca_write_cmsg_u32(cbuf, cbuf_sz, &cmsg_len,
SOL_IPV6, IPV6_DONTFRAG, &opt.v6.dontfrag);
ca_write_cmsg_u32(cbuf, cbuf_sz, &cmsg_len,
SOL_IPV6, IPV6_TCLASS, &opt.v6.tclass);
ca_write_cmsg_u32(cbuf, cbuf_sz, &cmsg_len,
SOL_IPV6, IPV6_HOPLIMIT, &opt.v6.hlimit);
if (opt.txtime.ena) {
struct sock_txtime so_txtime = {
.clockid = CLOCK_MONOTONIC,
};
__u64 txtime;
if (setsockopt(fd, SOL_SOCKET, SO_TXTIME,
&so_txtime, sizeof(so_txtime)))
error(ERN_SOCKOPT, errno, "setsockopt TXTIME");
txtime = time_start_mono.tv_sec * (1000ULL * 1000 * 1000) +
time_start_mono.tv_nsec +
opt.txtime.delay * 1000;
cmsg = (struct cmsghdr *)(cbuf + cmsg_len);
cmsg_len += CMSG_SPACE(sizeof(txtime));
if (cbuf_sz < cmsg_len)
error(ERN_CMSG_WR, EFAULT, "cmsg buffer too small");
cmsg->cmsg_level = SOL_SOCKET;
cmsg->cmsg_type = SCM_TXTIME;
cmsg->cmsg_len = CMSG_LEN(sizeof(txtime));
memcpy(CMSG_DATA(cmsg), &txtime, sizeof(txtime));
}
if (opt.ts.ena) {
__u32 val = SOF_TIMESTAMPING_SOFTWARE |
SOF_TIMESTAMPING_OPT_TSONLY;
if (setsockopt(fd, SOL_SOCKET, SO_TIMESTAMPING,
&val, sizeof(val)))
error(ERN_SOCKOPT, errno, "setsockopt TIMESTAMPING");
cmsg = (struct cmsghdr *)(cbuf + cmsg_len);
cmsg_len += CMSG_SPACE(sizeof(__u32));
if (cbuf_sz < cmsg_len)
error(ERN_CMSG_WR, EFAULT, "cmsg buffer too small");
cmsg->cmsg_level = SOL_SOCKET;
cmsg->cmsg_type = SO_TIMESTAMPING;
cmsg->cmsg_len = CMSG_LEN(sizeof(__u32));
*(__u32 *)CMSG_DATA(cmsg) = SOF_TIMESTAMPING_TX_SCHED |
SOF_TIMESTAMPING_TX_SOFTWARE;
}
if (opt.v6.exthdr.ena) {
cmsg = (struct cmsghdr *)(cbuf + cmsg_len);
cmsg_len += CMSG_SPACE(8);
if (cbuf_sz < cmsg_len)
error(ERN_CMSG_WR, EFAULT, "cmsg buffer too small");
cmsg->cmsg_level = SOL_IPV6;
cmsg->cmsg_type = opt.v6.exthdr.val;
cmsg->cmsg_len = CMSG_LEN(8);
*(__u64 *)CMSG_DATA(cmsg) = 0;
}
if (cmsg_len)
msg->msg_controllen = cmsg_len;
else
msg->msg_control = NULL;
}
static const char *cs_ts_info2str(unsigned int info)
{
static const char *names[] = {
[SCM_TSTAMP_SND] = "SND",
[SCM_TSTAMP_SCHED] = "SCHED",
[SCM_TSTAMP_ACK] = "ACK",
};
if (info < ARRAY_SIZE(names))
return names[info];
return "unknown";
}
static void
cs_read_cmsg(int fd, struct msghdr *msg, char *cbuf, size_t cbuf_sz)
{
struct sock_extended_err *see;
struct scm_timestamping *ts;
struct cmsghdr *cmsg;
int i, err;
if (!opt.ts.ena)
return;
msg->msg_control = cbuf;
msg->msg_controllen = cbuf_sz;
while (true) {
ts = NULL;
see = NULL;
memset(cbuf, 0, cbuf_sz);
err = recvmsg(fd, msg, MSG_ERRQUEUE);
if (err < 0) {
if (errno == EAGAIN)
break;
error(ERN_RECVERR, errno, "recvmsg ERRQ");
}
for (cmsg = CMSG_FIRSTHDR(msg); cmsg != NULL;
cmsg = CMSG_NXTHDR(msg, cmsg)) {
if (cmsg->cmsg_level == SOL_SOCKET &&
cmsg->cmsg_type == SO_TIMESTAMPING_OLD) {
if (cmsg->cmsg_len < sizeof(*ts))
error(ERN_CMSG_RD, EINVAL, "TS cmsg");
ts = (void *)CMSG_DATA(cmsg);
}
if ((cmsg->cmsg_level == SOL_IP &&
cmsg->cmsg_type == IP_RECVERR) ||
(cmsg->cmsg_level == SOL_IPV6 &&
cmsg->cmsg_type == IPV6_RECVERR)) {
if (cmsg->cmsg_len < sizeof(*see))
error(ERN_CMSG_RD, EINVAL, "sock_err cmsg");
see = (void *)CMSG_DATA(cmsg);
}
}
if (!ts)
error(ERN_CMSG_RCV, ENOENT, "TS cmsg not found");
if (!see)
error(ERN_CMSG_RCV, ENOENT, "sock_err cmsg not found");
for (i = 0; i < 3; i++) {
unsigned long long rel_time;
if (!ts->ts[i].tv_sec && !ts->ts[i].tv_nsec)
continue;
rel_time = (ts->ts[i].tv_sec - time_start_real.tv_sec) *
(1000ULL * 1000) +
(ts->ts[i].tv_nsec - time_start_real.tv_nsec) /
1000;
printf(" %5s ts%d %lluus\n",
cs_ts_info2str(see->ee_info),
i, rel_time);
}
}
}
static void ca_set_sockopts(int fd)
{
if (opt.sockopt.mark &&
setsockopt(fd, SOL_SOCKET, SO_MARK,
&opt.sockopt.mark, sizeof(opt.sockopt.mark)))
error(ERN_SOCKOPT, errno, "setsockopt SO_MARK");
if (opt.sockopt.dontfrag &&
setsockopt(fd, SOL_IPV6, IPV6_DONTFRAG,
&opt.sockopt.dontfrag, sizeof(opt.sockopt.dontfrag)))
error(ERN_SOCKOPT, errno, "setsockopt IPV6_DONTFRAG");
if (opt.sockopt.tclass &&
setsockopt(fd, SOL_IPV6, IPV6_TCLASS,
&opt.sockopt.tclass, sizeof(opt.sockopt.tclass)))
error(ERN_SOCKOPT, errno, "setsockopt IPV6_TCLASS");
if (opt.sockopt.hlimit &&
setsockopt(fd, SOL_IPV6, IPV6_UNICAST_HOPS,
&opt.sockopt.hlimit, sizeof(opt.sockopt.hlimit)))
error(ERN_SOCKOPT, errno, "setsockopt IPV6_HOPLIMIT");
}
int main(int argc, char *argv[])
{
struct addrinfo hints, *ai;
struct iovec iov[1];
struct msghdr msg;
char cbuf[1024];
char *buf;
int err;
int fd;
cs_parse_args(argc, argv);
buf = malloc(opt.size);
memrnd(buf, opt.size);
memset(&hints, 0, sizeof(hints));
hints.ai_family = opt.sock.family;
ai = NULL;
err = getaddrinfo(opt.host, opt.service, &hints, &ai);
if (err) {
fprintf(stderr, "Can't resolve address [%s]:%s\n",
opt.host, opt.service);
return ERN_SOCK_CREATE;
}
if (ai->ai_family == AF_INET6 && opt.sock.proto == IPPROTO_ICMP)
opt.sock.proto = IPPROTO_ICMPV6;
fd = socket(ai->ai_family, opt.sock.type, opt.sock.proto);
if (fd < 0) {
fprintf(stderr, "Can't open socket: %s\n", strerror(errno));
freeaddrinfo(ai);
return ERN_RESOLVE;
}
if (opt.sock.proto == IPPROTO_ICMP) {
buf[0] = ICMP_ECHO;
buf[1] = 0;
} else if (opt.sock.proto == IPPROTO_ICMPV6) {
buf[0] = ICMPV6_ECHO_REQUEST;
buf[1] = 0;
} else if (opt.sock.type == SOCK_RAW) {
struct udphdr hdr = { 1, 2, htons(opt.size), 0 };
struct sockaddr_in6 *sin6 = (void *)ai->ai_addr;
memcpy(buf, &hdr, sizeof(hdr));
sin6->sin6_port = htons(opt.sock.proto);
}
ca_set_sockopts(fd);
if (clock_gettime(CLOCK_REALTIME, &time_start_real))
error(ERN_GETTIME, errno, "gettime REALTIME");
if (clock_gettime(CLOCK_MONOTONIC, &time_start_mono))
error(ERN_GETTIME, errno, "gettime MONOTONIC");
iov[0].iov_base = buf;
iov[0].iov_len = opt.size;
memset(&msg, 0, sizeof(msg));
msg.msg_name = ai->ai_addr;
msg.msg_namelen = ai->ai_addrlen;
msg.msg_iov = iov;
msg.msg_iovlen = 1;
cs_write_cmsg(fd, &msg, cbuf, sizeof(cbuf));
err = sendmsg(fd, &msg, 0);
if (err < 0) {
if (!opt.silent_send)
fprintf(stderr, "send failed: %s\n", strerror(errno));
err = ERN_SEND;
goto err_out;
} else if (err != (int)opt.size) {
fprintf(stderr, "short send\n");
err = ERN_SEND_SHORT;
goto err_out;
} else {
err = ERN_SUCCESS;
}
/* Make sure all timestamps have time to loop back */
usleep(opt.txtime.delay);
cs_read_cmsg(fd, &msg, cbuf, sizeof(cbuf));
err_out:
close(fd);
freeaddrinfo(ai);
return err;
}
| linux-master | tools/testing/selftests/net/cmsg_sender.c |
// SPDX-License-Identifier: GPL-2.0-only
/*
* This code is taken from the Android Open Source Project and the author
* (Maciej Żenczykowski) has gave permission to relicense it under the
* GPLv2. Therefore this program is free software;
* You can redistribute it and/or modify it under the terms of the GNU
* General Public License version 2 as published by the Free Software
* Foundation
* The original headers, including the original license headers, are
* included below for completeness.
*
* Copyright (C) 2019 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include <linux/bpf.h>
#include <linux/if.h>
#include <linux/if_ether.h>
#include <linux/if_packet.h>
#include <linux/in.h>
#include <linux/in6.h>
#include <linux/ip.h>
#include <linux/ipv6.h>
#include <linux/pkt_cls.h>
#include <linux/swab.h>
#include <stdbool.h>
#include <stdint.h>
#include <linux/udp.h>
#include <bpf/bpf_helpers.h>
#include <bpf/bpf_endian.h>
#define IP_DF 0x4000 // Flag: "Don't Fragment"
SEC("schedcls/ingress6/nat_6")
int sched_cls_ingress6_nat_6_prog(struct __sk_buff *skb)
{
const int l2_header_size = sizeof(struct ethhdr);
void *data = (void *)(long)skb->data;
const void *data_end = (void *)(long)skb->data_end;
const struct ethhdr * const eth = data; // used iff is_ethernet
const struct ipv6hdr * const ip6 = (void *)(eth + 1);
// Require ethernet dst mac address to be our unicast address.
if (skb->pkt_type != PACKET_HOST)
return TC_ACT_OK;
// Must be meta-ethernet IPv6 frame
if (skb->protocol != bpf_htons(ETH_P_IPV6))
return TC_ACT_OK;
// Must have (ethernet and) ipv6 header
if (data + l2_header_size + sizeof(*ip6) > data_end)
return TC_ACT_OK;
// Ethertype - if present - must be IPv6
if (eth->h_proto != bpf_htons(ETH_P_IPV6))
return TC_ACT_OK;
// IP version must be 6
if (ip6->version != 6)
return TC_ACT_OK;
// Maximum IPv6 payload length that can be translated to IPv4
if (bpf_ntohs(ip6->payload_len) > 0xFFFF - sizeof(struct iphdr))
return TC_ACT_OK;
switch (ip6->nexthdr) {
case IPPROTO_TCP: // For TCP & UDP the checksum neutrality of the chosen IPv6
case IPPROTO_UDP: // address means there is no need to update their checksums.
case IPPROTO_GRE: // We do not need to bother looking at GRE/ESP headers,
case IPPROTO_ESP: // since there is never a checksum to update.
break;
default: // do not know how to handle anything else
return TC_ACT_OK;
}
struct ethhdr eth2; // used iff is_ethernet
eth2 = *eth; // Copy over the ethernet header (src/dst mac)
eth2.h_proto = bpf_htons(ETH_P_IP); // But replace the ethertype
struct iphdr ip = {
.version = 4, // u4
.ihl = sizeof(struct iphdr) / sizeof(__u32), // u4
.tos = (ip6->priority << 4) + (ip6->flow_lbl[0] >> 4), // u8
.tot_len = bpf_htons(bpf_ntohs(ip6->payload_len) + sizeof(struct iphdr)), // u16
.id = 0, // u16
.frag_off = bpf_htons(IP_DF), // u16
.ttl = ip6->hop_limit, // u8
.protocol = ip6->nexthdr, // u8
.check = 0, // u16
.saddr = 0x0201a8c0, // u32
.daddr = 0x0101a8c0, // u32
};
// Calculate the IPv4 one's complement checksum of the IPv4 header.
__wsum sum4 = 0;
for (int i = 0; i < sizeof(ip) / sizeof(__u16); ++i)
sum4 += ((__u16 *)&ip)[i];
// Note that sum4 is guaranteed to be non-zero by virtue of ip.version == 4
sum4 = (sum4 & 0xFFFF) + (sum4 >> 16); // collapse u32 into range 1 .. 0x1FFFE
sum4 = (sum4 & 0xFFFF) + (sum4 >> 16); // collapse any potential carry into u16
ip.check = (__u16)~sum4; // sum4 cannot be zero, so this is never 0xFFFF
// Calculate the *negative* IPv6 16-bit one's complement checksum of the IPv6 header.
__wsum sum6 = 0;
// We'll end up with a non-zero sum due to ip6->version == 6 (which has '0' bits)
for (int i = 0; i < sizeof(*ip6) / sizeof(__u16); ++i)
sum6 += ~((__u16 *)ip6)[i]; // note the bitwise negation
// Note that there is no L4 checksum update: we are relying on the checksum neutrality
// of the ipv6 address chosen by netd's ClatdController.
// Packet mutations begin - point of no return, but if this first modification fails
// the packet is probably still pristine, so let clatd handle it.
if (bpf_skb_change_proto(skb, bpf_htons(ETH_P_IP), 0))
return TC_ACT_OK;
bpf_csum_update(skb, sum6);
data = (void *)(long)skb->data;
data_end = (void *)(long)skb->data_end;
if (data + l2_header_size + sizeof(struct iphdr) > data_end)
return TC_ACT_SHOT;
struct ethhdr *new_eth = data;
// Copy over the updated ethernet header
*new_eth = eth2;
// Copy over the new ipv4 header.
*(struct iphdr *)(new_eth + 1) = ip;
return bpf_redirect(skb->ifindex, BPF_F_INGRESS);
}
SEC("schedcls/egress4/snat4")
int sched_cls_egress4_snat4_prog(struct __sk_buff *skb)
{
const int l2_header_size = sizeof(struct ethhdr);
void *data = (void *)(long)skb->data;
const void *data_end = (void *)(long)skb->data_end;
const struct ethhdr *const eth = data; // used iff is_ethernet
const struct iphdr *const ip4 = (void *)(eth + 1);
// Must be meta-ethernet IPv4 frame
if (skb->protocol != bpf_htons(ETH_P_IP))
return TC_ACT_OK;
// Must have ipv4 header
if (data + l2_header_size + sizeof(struct ipv6hdr) > data_end)
return TC_ACT_OK;
// Ethertype - if present - must be IPv4
if (eth->h_proto != bpf_htons(ETH_P_IP))
return TC_ACT_OK;
// IP version must be 4
if (ip4->version != 4)
return TC_ACT_OK;
// We cannot handle IP options, just standard 20 byte == 5 dword minimal IPv4 header
if (ip4->ihl != 5)
return TC_ACT_OK;
// Maximum IPv6 payload length that can be translated to IPv4
if (bpf_htons(ip4->tot_len) > 0xFFFF - sizeof(struct ipv6hdr))
return TC_ACT_OK;
// Calculate the IPv4 one's complement checksum of the IPv4 header.
__wsum sum4 = 0;
for (int i = 0; i < sizeof(*ip4) / sizeof(__u16); ++i)
sum4 += ((__u16 *)ip4)[i];
// Note that sum4 is guaranteed to be non-zero by virtue of ip4->version == 4
sum4 = (sum4 & 0xFFFF) + (sum4 >> 16); // collapse u32 into range 1 .. 0x1FFFE
sum4 = (sum4 & 0xFFFF) + (sum4 >> 16); // collapse any potential carry into u16
// for a correct checksum we should get *a* zero, but sum4 must be positive, ie 0xFFFF
if (sum4 != 0xFFFF)
return TC_ACT_OK;
// Minimum IPv4 total length is the size of the header
if (bpf_ntohs(ip4->tot_len) < sizeof(*ip4))
return TC_ACT_OK;
// We are incapable of dealing with IPv4 fragments
if (ip4->frag_off & ~bpf_htons(IP_DF))
return TC_ACT_OK;
switch (ip4->protocol) {
case IPPROTO_TCP: // For TCP & UDP the checksum neutrality of the chosen IPv6
case IPPROTO_GRE: // address means there is no need to update their checksums.
case IPPROTO_ESP: // We do not need to bother looking at GRE/ESP headers,
break; // since there is never a checksum to update.
case IPPROTO_UDP: // See above comment, but must also have UDP header...
if (data + sizeof(*ip4) + sizeof(struct udphdr) > data_end)
return TC_ACT_OK;
const struct udphdr *uh = (const struct udphdr *)(ip4 + 1);
// If IPv4/UDP checksum is 0 then fallback to clatd so it can calculate the
// checksum. Otherwise the network or more likely the NAT64 gateway might
// drop the packet because in most cases IPv6/UDP packets with a zero checksum
// are invalid. See RFC 6935. TODO: calculate checksum via bpf_csum_diff()
if (!uh->check)
return TC_ACT_OK;
break;
default: // do not know how to handle anything else
return TC_ACT_OK;
}
struct ethhdr eth2; // used iff is_ethernet
eth2 = *eth; // Copy over the ethernet header (src/dst mac)
eth2.h_proto = bpf_htons(ETH_P_IPV6); // But replace the ethertype
struct ipv6hdr ip6 = {
.version = 6, // __u8:4
.priority = ip4->tos >> 4, // __u8:4
.flow_lbl = {(ip4->tos & 0xF) << 4, 0, 0}, // __u8[3]
.payload_len = bpf_htons(bpf_ntohs(ip4->tot_len) - 20), // __be16
.nexthdr = ip4->protocol, // __u8
.hop_limit = ip4->ttl, // __u8
};
ip6.saddr.in6_u.u6_addr32[0] = bpf_htonl(0x20010db8);
ip6.saddr.in6_u.u6_addr32[1] = 0;
ip6.saddr.in6_u.u6_addr32[2] = 0;
ip6.saddr.in6_u.u6_addr32[3] = bpf_htonl(1);
ip6.daddr.in6_u.u6_addr32[0] = bpf_htonl(0x20010db8);
ip6.daddr.in6_u.u6_addr32[1] = 0;
ip6.daddr.in6_u.u6_addr32[2] = 0;
ip6.daddr.in6_u.u6_addr32[3] = bpf_htonl(2);
// Calculate the IPv6 16-bit one's complement checksum of the IPv6 header.
__wsum sum6 = 0;
// We'll end up with a non-zero sum due to ip6.version == 6
for (int i = 0; i < sizeof(ip6) / sizeof(__u16); ++i)
sum6 += ((__u16 *)&ip6)[i];
// Packet mutations begin - point of no return, but if this first modification fails
// the packet is probably still pristine, so let clatd handle it.
if (bpf_skb_change_proto(skb, bpf_htons(ETH_P_IPV6), 0))
return TC_ACT_OK;
// This takes care of updating the skb->csum field for a CHECKSUM_COMPLETE packet.
// In such a case, skb->csum is a 16-bit one's complement sum of the entire payload,
// thus we need to subtract out the ipv4 header's sum, and add in the ipv6 header's sum.
// However, we've already verified the ipv4 checksum is correct and thus 0.
// Thus we only need to add the ipv6 header's sum.
//
// bpf_csum_update() always succeeds if the skb is CHECKSUM_COMPLETE and returns an error
// (-ENOTSUPP) if it isn't. So we just ignore the return code (see above for more details).
bpf_csum_update(skb, sum6);
// bpf_skb_change_proto() invalidates all pointers - reload them.
data = (void *)(long)skb->data;
data_end = (void *)(long)skb->data_end;
// I cannot think of any valid way for this error condition to trigger, however I do
// believe the explicit check is required to keep the in kernel ebpf verifier happy.
if (data + l2_header_size + sizeof(ip6) > data_end)
return TC_ACT_SHOT;
struct ethhdr *new_eth = data;
// Copy over the updated ethernet header
*new_eth = eth2;
// Copy over the new ipv4 header.
*(struct ipv6hdr *)(new_eth + 1) = ip6;
return TC_ACT_OK;
}
char _license[] SEC("license") = ("GPL");
| linux-master | tools/testing/selftests/net/nat6to4.c |
// SPDX-License-Identifier: GPL-2.0
/*
* Test key rotation for TFO.
* New keys are 'rotated' in two steps:
* 1) Add new key as the 'backup' key 'behind' the primary key
* 2) Make new key the primary by swapping the backup and primary keys
*
* The rotation is done in stages using multiple sockets bound
* to the same port via SO_REUSEPORT. This simulates key rotation
* behind say a load balancer. We verify that across the rotation
* there are no cases in which a cookie is not accepted by verifying
* that TcpExtTCPFastOpenPassiveFail remains 0.
*/
#define _GNU_SOURCE
#include <arpa/inet.h>
#include <errno.h>
#include <error.h>
#include <stdbool.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/epoll.h>
#include <unistd.h>
#include <netinet/tcp.h>
#include <fcntl.h>
#include <time.h>
#include "../kselftest.h"
#ifndef TCP_FASTOPEN_KEY
#define TCP_FASTOPEN_KEY 33
#endif
#define N_LISTEN 10
#define PROC_FASTOPEN_KEY "/proc/sys/net/ipv4/tcp_fastopen_key"
#define KEY_LENGTH 16
static bool do_ipv6;
static bool do_sockopt;
static bool do_rotate;
static int key_len = KEY_LENGTH;
static int rcv_fds[N_LISTEN];
static int proc_fd;
static const char *IP4_ADDR = "127.0.0.1";
static const char *IP6_ADDR = "::1";
static const int PORT = 8891;
static void get_keys(int fd, uint32_t *keys)
{
char buf[128];
socklen_t len = KEY_LENGTH * 2;
if (do_sockopt) {
if (getsockopt(fd, SOL_TCP, TCP_FASTOPEN_KEY, keys, &len))
error(1, errno, "Unable to get key");
return;
}
lseek(proc_fd, 0, SEEK_SET);
if (read(proc_fd, buf, sizeof(buf)) <= 0)
error(1, errno, "Unable to read %s", PROC_FASTOPEN_KEY);
if (sscanf(buf, "%x-%x-%x-%x,%x-%x-%x-%x", keys, keys + 1, keys + 2,
keys + 3, keys + 4, keys + 5, keys + 6, keys + 7) != 8)
error(1, 0, "Unable to parse %s", PROC_FASTOPEN_KEY);
}
static void set_keys(int fd, uint32_t *keys)
{
char buf[128];
if (do_sockopt) {
if (setsockopt(fd, SOL_TCP, TCP_FASTOPEN_KEY, keys,
key_len))
error(1, errno, "Unable to set key");
return;
}
if (do_rotate)
snprintf(buf, 128, "%08x-%08x-%08x-%08x,%08x-%08x-%08x-%08x",
keys[0], keys[1], keys[2], keys[3], keys[4], keys[5],
keys[6], keys[7]);
else
snprintf(buf, 128, "%08x-%08x-%08x-%08x",
keys[0], keys[1], keys[2], keys[3]);
lseek(proc_fd, 0, SEEK_SET);
if (write(proc_fd, buf, sizeof(buf)) <= 0)
error(1, errno, "Unable to write %s", PROC_FASTOPEN_KEY);
}
static void build_rcv_fd(int family, int proto, int *rcv_fds)
{
struct sockaddr_in addr4 = {0};
struct sockaddr_in6 addr6 = {0};
struct sockaddr *addr;
int opt = 1, i, sz;
int qlen = 100;
uint32_t keys[8];
switch (family) {
case AF_INET:
addr4.sin_family = family;
addr4.sin_addr.s_addr = htonl(INADDR_ANY);
addr4.sin_port = htons(PORT);
sz = sizeof(addr4);
addr = (struct sockaddr *)&addr4;
break;
case AF_INET6:
addr6.sin6_family = AF_INET6;
addr6.sin6_addr = in6addr_any;
addr6.sin6_port = htons(PORT);
sz = sizeof(addr6);
addr = (struct sockaddr *)&addr6;
break;
default:
error(1, 0, "Unsupported family %d", family);
/* clang does not recognize error() above as terminating
* the program, so it complains that saddr, sz are
* not initialized when this code path is taken. Silence it.
*/
return;
}
for (i = 0; i < ARRAY_SIZE(keys); i++)
keys[i] = rand();
for (i = 0; i < N_LISTEN; i++) {
rcv_fds[i] = socket(family, proto, 0);
if (rcv_fds[i] < 0)
error(1, errno, "failed to create receive socket");
if (setsockopt(rcv_fds[i], SOL_SOCKET, SO_REUSEPORT, &opt,
sizeof(opt)))
error(1, errno, "failed to set SO_REUSEPORT");
if (bind(rcv_fds[i], addr, sz))
error(1, errno, "failed to bind receive socket");
if (setsockopt(rcv_fds[i], SOL_TCP, TCP_FASTOPEN, &qlen,
sizeof(qlen)))
error(1, errno, "failed to set TCP_FASTOPEN");
set_keys(rcv_fds[i], keys);
if (proto == SOCK_STREAM && listen(rcv_fds[i], 10))
error(1, errno, "failed to listen on receive port");
}
}
static int connect_and_send(int family, int proto)
{
struct sockaddr_in saddr4 = {0};
struct sockaddr_in daddr4 = {0};
struct sockaddr_in6 saddr6 = {0};
struct sockaddr_in6 daddr6 = {0};
struct sockaddr *saddr, *daddr;
int fd, sz, ret;
char data[1];
switch (family) {
case AF_INET:
saddr4.sin_family = AF_INET;
saddr4.sin_addr.s_addr = htonl(INADDR_ANY);
saddr4.sin_port = 0;
daddr4.sin_family = AF_INET;
if (!inet_pton(family, IP4_ADDR, &daddr4.sin_addr.s_addr))
error(1, errno, "inet_pton failed: %s", IP4_ADDR);
daddr4.sin_port = htons(PORT);
sz = sizeof(saddr4);
saddr = (struct sockaddr *)&saddr4;
daddr = (struct sockaddr *)&daddr4;
break;
case AF_INET6:
saddr6.sin6_family = AF_INET6;
saddr6.sin6_addr = in6addr_any;
daddr6.sin6_family = AF_INET6;
if (!inet_pton(family, IP6_ADDR, &daddr6.sin6_addr))
error(1, errno, "inet_pton failed: %s", IP6_ADDR);
daddr6.sin6_port = htons(PORT);
sz = sizeof(saddr6);
saddr = (struct sockaddr *)&saddr6;
daddr = (struct sockaddr *)&daddr6;
break;
default:
error(1, 0, "Unsupported family %d", family);
/* clang does not recognize error() above as terminating
* the program, so it complains that saddr, daddr, sz are
* not initialized when this code path is taken. Silence it.
*/
return -1;
}
fd = socket(family, proto, 0);
if (fd < 0)
error(1, errno, "failed to create send socket");
if (bind(fd, saddr, sz))
error(1, errno, "failed to bind send socket");
data[0] = 'a';
ret = sendto(fd, data, 1, MSG_FASTOPEN, daddr, sz);
if (ret != 1)
error(1, errno, "failed to sendto");
return fd;
}
static bool is_listen_fd(int fd)
{
int i;
for (i = 0; i < N_LISTEN; i++) {
if (rcv_fds[i] == fd)
return true;
}
return false;
}
static void rotate_key(int fd)
{
static int iter;
static uint32_t new_key[4];
uint32_t keys[8];
uint32_t tmp_key[4];
int i;
if (iter < N_LISTEN) {
/* first set new key as backups */
if (iter == 0) {
for (i = 0; i < ARRAY_SIZE(new_key); i++)
new_key[i] = rand();
}
get_keys(fd, keys);
memcpy(keys + 4, new_key, KEY_LENGTH);
set_keys(fd, keys);
} else {
/* swap the keys */
get_keys(fd, keys);
memcpy(tmp_key, keys + 4, KEY_LENGTH);
memcpy(keys + 4, keys, KEY_LENGTH);
memcpy(keys, tmp_key, KEY_LENGTH);
set_keys(fd, keys);
}
if (++iter >= (N_LISTEN * 2))
iter = 0;
}
static void run_one_test(int family)
{
struct epoll_event ev;
int i, send_fd;
int n_loops = 10000;
int rotate_key_fd = 0;
int key_rotate_interval = 50;
int fd, epfd;
char buf[1];
build_rcv_fd(family, SOCK_STREAM, rcv_fds);
epfd = epoll_create(1);
if (epfd < 0)
error(1, errno, "failed to create epoll");
ev.events = EPOLLIN;
for (i = 0; i < N_LISTEN; i++) {
ev.data.fd = rcv_fds[i];
if (epoll_ctl(epfd, EPOLL_CTL_ADD, rcv_fds[i], &ev))
error(1, errno, "failed to register sock epoll");
}
while (n_loops--) {
send_fd = connect_and_send(family, SOCK_STREAM);
if (do_rotate && ((n_loops % key_rotate_interval) == 0)) {
rotate_key(rcv_fds[rotate_key_fd]);
if (++rotate_key_fd >= N_LISTEN)
rotate_key_fd = 0;
}
while (1) {
i = epoll_wait(epfd, &ev, 1, -1);
if (i < 0)
error(1, errno, "epoll_wait failed");
if (is_listen_fd(ev.data.fd)) {
fd = accept(ev.data.fd, NULL, NULL);
if (fd < 0)
error(1, errno, "failed to accept");
ev.data.fd = fd;
if (epoll_ctl(epfd, EPOLL_CTL_ADD, fd, &ev))
error(1, errno, "failed epoll add");
continue;
}
i = recv(ev.data.fd, buf, sizeof(buf), 0);
if (i != 1)
error(1, errno, "failed recv data");
if (epoll_ctl(epfd, EPOLL_CTL_DEL, ev.data.fd, NULL))
error(1, errno, "failed epoll del");
close(ev.data.fd);
break;
}
close(send_fd);
}
for (i = 0; i < N_LISTEN; i++)
close(rcv_fds[i]);
}
static void parse_opts(int argc, char **argv)
{
int c;
while ((c = getopt(argc, argv, "46sr")) != -1) {
switch (c) {
case '4':
do_ipv6 = false;
break;
case '6':
do_ipv6 = true;
break;
case 's':
do_sockopt = true;
break;
case 'r':
do_rotate = true;
key_len = KEY_LENGTH * 2;
break;
default:
error(1, 0, "%s: parse error", argv[0]);
}
}
}
int main(int argc, char **argv)
{
parse_opts(argc, argv);
proc_fd = open(PROC_FASTOPEN_KEY, O_RDWR);
if (proc_fd < 0)
error(1, errno, "Unable to open %s", PROC_FASTOPEN_KEY);
srand(time(NULL));
if (do_ipv6)
run_one_test(AF_INET6);
else
run_one_test(AF_INET);
close(proc_fd);
fprintf(stderr, "PASS\n");
return 0;
}
| linux-master | tools/testing/selftests/net/tcp_fastopen_backup_key.c |
// SPDX-License-Identifier: GPL-2.0
/*
* This times how long it takes to bind to a port when the port already
* has multiple sockets in its bhash table.
*
* In the setup(), we populate the port's bhash table with
* MAX_THREADS * MAX_CONNECTIONS number of entries.
*/
#include <unistd.h>
#include <stdio.h>
#include <netdb.h>
#include <pthread.h>
#include <string.h>
#include <stdbool.h>
#define MAX_THREADS 600
#define MAX_CONNECTIONS 40
static const char *setup_addr_v6 = "::1";
static const char *setup_addr_v4 = "127.0.0.1";
static const char *setup_addr;
static const char *bind_addr;
static const char *port;
bool use_v6;
int ret;
static int fd_array[MAX_THREADS][MAX_CONNECTIONS];
static int bind_socket(int opt, const char *addr)
{
struct addrinfo *res, hint = {};
int sock_fd, reuse = 1, err;
int domain = use_v6 ? AF_INET6 : AF_INET;
sock_fd = socket(domain, SOCK_STREAM, 0);
if (sock_fd < 0) {
perror("socket fd err");
return sock_fd;
}
hint.ai_family = domain;
hint.ai_socktype = SOCK_STREAM;
err = getaddrinfo(addr, port, &hint, &res);
if (err) {
perror("getaddrinfo failed");
goto cleanup;
}
if (opt) {
err = setsockopt(sock_fd, SOL_SOCKET, opt, &reuse, sizeof(reuse));
if (err) {
perror("setsockopt failed");
goto cleanup;
}
}
err = bind(sock_fd, res->ai_addr, res->ai_addrlen);
if (err) {
perror("failed to bind to port");
goto cleanup;
}
return sock_fd;
cleanup:
close(sock_fd);
return err;
}
static void *setup(void *arg)
{
int sock_fd, i;
int *array = (int *)arg;
for (i = 0; i < MAX_CONNECTIONS; i++) {
sock_fd = bind_socket(SO_REUSEADDR | SO_REUSEPORT, setup_addr);
if (sock_fd < 0) {
ret = sock_fd;
pthread_exit(&ret);
}
array[i] = sock_fd;
}
return NULL;
}
int main(int argc, const char *argv[])
{
int listener_fd, sock_fd, i, j;
pthread_t tid[MAX_THREADS];
clock_t begin, end;
if (argc != 4) {
printf("Usage: listener <port> <ipv6 | ipv4> <bind-addr>\n");
return -1;
}
port = argv[1];
use_v6 = strcmp(argv[2], "ipv6") == 0;
bind_addr = argv[3];
setup_addr = use_v6 ? setup_addr_v6 : setup_addr_v4;
listener_fd = bind_socket(SO_REUSEADDR | SO_REUSEPORT, setup_addr);
if (listen(listener_fd, 100) < 0) {
perror("listen failed");
return -1;
}
/* Set up threads to populate the bhash table entry for the port */
for (i = 0; i < MAX_THREADS; i++)
pthread_create(&tid[i], NULL, setup, fd_array[i]);
for (i = 0; i < MAX_THREADS; i++)
pthread_join(tid[i], NULL);
if (ret)
goto done;
begin = clock();
/* Bind to the same port on a different address */
sock_fd = bind_socket(0, bind_addr);
if (sock_fd < 0)
goto done;
end = clock();
printf("time spent = %f\n", (double)(end - begin) / CLOCKS_PER_SEC);
/* clean up */
close(sock_fd);
done:
close(listener_fd);
for (i = 0; i < MAX_THREADS; i++) {
for (j = 0; i < MAX_THREADS; i++)
close(fd_array[i][j]);
}
return 0;
}
| linux-master | tools/testing/selftests/net/bind_bhash.c |
// SPDX-License-Identifier: GPL-2.0
/*
* Verify that consecutive sends over packet tx_ring are mirrored
* with their original content intact.
*/
#define _GNU_SOURCE
#include <arpa/inet.h>
#include <assert.h>
#include <error.h>
#include <errno.h>
#include <fcntl.h>
#include <linux/filter.h>
#include <linux/if_packet.h>
#include <net/ethernet.h>
#include <net/if.h>
#include <netinet/in.h>
#include <netinet/ip.h>
#include <netinet/udp.h>
#include <poll.h>
#include <pthread.h>
#include <sched.h>
#include <sys/ioctl.h>
#include <sys/mman.h>
#include <sys/socket.h>
#include <sys/time.h>
#include <sys/types.h>
#include <sys/utsname.h>
#include <stdbool.h>
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
const int eth_off = TPACKET_HDRLEN - sizeof(struct sockaddr_ll);
const int cfg_frame_size = 1000;
static void build_packet(void *buffer, size_t blen, char payload_char)
{
struct udphdr *udph;
struct ethhdr *eth;
struct iphdr *iph;
size_t off = 0;
memset(buffer, 0, blen);
eth = buffer;
eth->h_proto = htons(ETH_P_IP);
off += sizeof(*eth);
iph = buffer + off;
iph->ttl = 8;
iph->ihl = 5;
iph->version = 4;
iph->saddr = htonl(INADDR_LOOPBACK);
iph->daddr = htonl(INADDR_LOOPBACK + 1);
iph->protocol = IPPROTO_UDP;
iph->tot_len = htons(blen - off);
iph->check = 0;
off += sizeof(*iph);
udph = buffer + off;
udph->dest = htons(8000);
udph->source = htons(8001);
udph->len = htons(blen - off);
udph->check = 0;
off += sizeof(*udph);
memset(buffer + off, payload_char, blen - off);
}
static int setup_rx(void)
{
int fdr;
fdr = socket(PF_PACKET, SOCK_RAW, htons(ETH_P_IP));
if (fdr == -1)
error(1, errno, "socket r");
return fdr;
}
static int setup_tx(char **ring)
{
struct sockaddr_ll laddr = {};
struct tpacket_req req = {};
int fdt;
fdt = socket(PF_PACKET, SOCK_RAW, 0);
if (fdt == -1)
error(1, errno, "socket t");
laddr.sll_family = AF_PACKET;
laddr.sll_protocol = htons(0);
laddr.sll_ifindex = if_nametoindex("lo");
if (!laddr.sll_ifindex)
error(1, errno, "if_nametoindex");
if (bind(fdt, (void *)&laddr, sizeof(laddr)))
error(1, errno, "bind fdt");
req.tp_block_size = getpagesize();
req.tp_block_nr = 1;
req.tp_frame_size = getpagesize();
req.tp_frame_nr = 1;
if (setsockopt(fdt, SOL_PACKET, PACKET_TX_RING,
(void *)&req, sizeof(req)))
error(1, errno, "setsockopt ring");
*ring = mmap(0, req.tp_block_size * req.tp_block_nr,
PROT_READ | PROT_WRITE, MAP_SHARED, fdt, 0);
if (*ring == MAP_FAILED)
error(1, errno, "mmap");
return fdt;
}
static void send_pkt(int fdt, void *slot, char payload_char)
{
struct tpacket_hdr *header = slot;
int ret;
while (header->tp_status != TP_STATUS_AVAILABLE)
usleep(1000);
build_packet(slot + eth_off, cfg_frame_size, payload_char);
header->tp_len = cfg_frame_size;
header->tp_status = TP_STATUS_SEND_REQUEST;
ret = sendto(fdt, NULL, 0, 0, NULL, 0);
if (ret == -1)
error(1, errno, "kick tx");
}
static int read_verify_pkt(int fdr, char payload_char)
{
char buf[100];
int ret;
ret = read(fdr, buf, sizeof(buf));
if (ret != sizeof(buf))
error(1, errno, "read");
if (buf[60] != payload_char) {
printf("wrong pattern: 0x%x != 0x%x\n", buf[60], payload_char);
return 1;
}
printf("read: %c (0x%x)\n", buf[60], buf[60]);
return 0;
}
int main(int argc, char **argv)
{
const char payload_patterns[] = "ab";
char *ring;
int fdr, fdt, ret = 0;
fdr = setup_rx();
fdt = setup_tx(&ring);
send_pkt(fdt, ring, payload_patterns[0]);
send_pkt(fdt, ring, payload_patterns[1]);
ret |= read_verify_pkt(fdr, payload_patterns[0]);
ret |= read_verify_pkt(fdr, payload_patterns[1]);
if (close(fdt))
error(1, errno, "close t");
if (close(fdr))
error(1, errno, "close r");
return ret;
}
| linux-master | tools/testing/selftests/net/txring_overwrite.c |
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