text: /*	$NetBSD: t_io.c,v 1.17 2017/01/13 21:30:40 christos Exp $	*/
  
  /*-
   * Copyright (c) 2010 The NetBSD Foundation, Inc.
   * All rights reserved.
   *
   * Redistribution and use in source and binary forms, with or without
   * modification, are permitted provided that the following conditions
   * are met:
   * 1. Redistributions of source code must retain the above copyright
   *    notice, this list of conditions and the following disclaimer.
   * 2. Redistributions in binary form must reproduce the above copyright
   *    notice, this list of conditions and the following disclaimer in the
   *    documentation and/or other materials provided with the distribution.
   *
   * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
   * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
   * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
   * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
   * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
   * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
   * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
   * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
   * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
   * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
   * POSSIBILITY OF SUCH DAMAGE.
   */
  
  #include <sys/stat.h>
  #include <sys/statvfs.h>
  
  #include <atf-c.h>
  #include <fcntl.h>
  #include <libgen.h>
  #include <stdlib.h>
  #include <unistd.h>
  
  #include <rump/rump_syscalls.h>
  #include <rump/rump.h>
  
  #include "../common/h_fsmacros.h"
  #include "h_macros.h"
  
  #define TESTSTR "this is a string.  collect enough and you'll have Em"
  #define TESTSZ sizeof(TESTSTR)
  
  static void
  holywrite(const atf_tc_t *tc, const char *mp)
  {
  	char buf[1024];
  	char *b2, *b3;
  	size_t therange = getpagesize()+1;
  	int fd;
  
  	FSTEST_ENTER();
  
  	RL(fd = rump_sys_open("file", O_RDWR|O_CREAT|O_TRUNC, 0666));
  
  	memset(buf, 'A', sizeof(buf));
  	RL(rump_sys_pwrite(fd, buf, 1, getpagesize()));
  
  	memset(buf, 'B', sizeof(buf));
  	RL(rump_sys_pwrite(fd, buf, 2, getpagesize()-1));
  
  	REQUIRE_LIBC(b2 = malloc(2 * getpagesize()), NULL);
  	REQUIRE_LIBC(b3 = malloc(2 * getpagesize()), NULL);
  
  	RL(rump_sys_pread(fd, b2, therange, 0));
  
  	memset(b3, 0, therange);
  	memset(b3 + getpagesize() - 1, 'B', 2);
  
  	ATF_REQUIRE_EQ(memcmp(b2, b3, therange), 0);
  
  	rump_sys_close(fd);
  	FSTEST_EXIT();
  }
  
  static void
  extendbody(const atf_tc_t *tc, off_t seekcnt)
  {
  	char buf[TESTSZ+1];
  	struct stat sb;
  	int fd;
  
  	FSTEST_ENTER();
  	RL(fd = rump_sys_open("testfile",
  	    O_CREAT | O_RDWR | (seekcnt ? O_APPEND : 0)));
  	RL(rump_sys_ftruncate(fd, seekcnt));
  	RL(rump_sys_fstat(fd, &sb));
  	ATF_REQUIRE_EQ(sb.st_size, seekcnt);
  
  	ATF_REQUIRE_EQ(rump_sys_write(fd, TESTSTR, TESTSZ), TESTSZ);
  	ATF_REQUIRE_EQ(rump_sys_pread(fd, buf, TESTSZ, seekcnt), TESTSZ);
  	ATF_REQUIRE_STREQ(buf, TESTSTR);
  
  	RL(rump_sys_fstat(fd, &sb));
  	ATF_REQUIRE_EQ(sb.st_size, (off_t)TESTSZ + seekcnt);
  	RL(rump_sys_close(fd));
  	FSTEST_EXIT();
  }
  
  static void
  extendfile(const atf_tc_t *tc, const char *mp)
  {
  
  	extendbody(tc, 0);
  }
  
  static void
  extendfile_append(const atf_tc_t *tc, const char *mp)
  {
  
  	extendbody(tc, 37);
  }
  
  static void
  overwritebody(const atf_tc_t *tc, off_t count, bool dotrunc)
  {
  	char *buf;
  	int fd;
  
  	REQUIRE_LIBC(buf = malloc(count), NULL);
  	FSTEST_ENTER();
  	RL(fd = rump_sys_open("testi", O_CREAT | O_RDWR, 0666));
  	ATF_REQUIRE_EQ(rump_sys_write(fd, buf, count), count);
  	RL(rump_sys_close(fd));
  
  	RL(fd = rump_sys_open("testi", O_RDWR));
  	if (dotrunc)
  		RL(rump_sys_ftruncate(fd, 0));
  	ATF_REQUIRE_EQ(rump_sys_write(fd, buf, count), count);
  	RL(rump_sys_close(fd));
  	FSTEST_EXIT();
  }
  
  static void
  overwrite512(const atf_tc_t *tc, const char *mp)
  {
  
  	overwritebody(tc, 512, false);
  }
  
  static void
  overwrite64k(const atf_tc_t *tc, const char *mp)
  {
  
  	overwritebody(tc, 1<<16, false);
  }
  
  static void
  overwrite_trunc(const atf_tc_t *tc, const char *mp)
  {
  
  	overwritebody(tc, 1<<16, true);
  }
  
  static void
  shrinkfile(const atf_tc_t *tc, const char *mp)
  {
  	int fd;
  
  	FSTEST_ENTER();
  	RL(fd = rump_sys_open("file", O_RDWR|O_CREAT|O_TRUNC, 0666));
  	RL(rump_sys_ftruncate(fd, 2));
  	RL(rump_sys_ftruncate(fd, 1));
  	rump_sys_close(fd);
  	FSTEST_EXIT();
  }
  
  #define TBSIZE 9000
  static void
  read_after_unlink(const atf_tc_t *tc, const char *mp)
  {
  	char buf[TBSIZE], buf2[TBSIZE];
  	int fd;
  
  	FSTEST_ENTER();
  
  	/* create file and put some content into it */
  	RL(fd = rump_sys_open("file", O_RDWR|O_CREAT, 0666));
  	memset(buf, 'D', TBSIZE);
  	ATF_REQUIRE_EQ(rump_sys_write(fd, buf, TBSIZE), TBSIZE);
  	rump_sys_close(fd);
  
  	/* flush buffers from UBC to file system */
  	ATF_REQUIRE_ERRNO(EBUSY, rump_sys_unmount(mp, 0) == -1);
  
  	RL(fd = rump_sys_open("file", O_RDWR));
  	RL(rump_sys_unlink("file"));
  
  	ATF_REQUIRE_EQ(rump_sys_read(fd, buf2, TBSIZE), TBSIZE);
  	ATF_REQUIRE_EQ(memcmp(buf, buf2, TBSIZE), 0);
  	rump_sys_close(fd);
  
  	FSTEST_EXIT();
  }
  
  static void
  wrrd_after_unlink(const atf_tc_t *tc, const char *mp)
  {
  	int value = 0x11;
  	int v2;
  	int fd;
  
  	FSTEST_ENTER();
  
  	RL(fd = rump_sys_open("file", O_RDWR|O_CREAT, 0666));
  	RL(rump_sys_unlink("file"));
  
  	RL(rump_sys_pwrite(fd, &value, sizeof(value), 654321));
  
  	/*
  	 * We can't easily invalidate the buffer since we hold a
  	 * reference, but try to get them to flush anyway.
  	 */
  	RL(rump_sys_fsync(fd));
  	RL(rump_sys_pread(fd, &v2, sizeof(v2), 654321));
  	rump_sys_close(fd);
  
  	ATF_REQUIRE_EQ(value, v2);
  	FSTEST_EXIT();
  }
  
  static void
  read_fault(const atf_tc_t *tc, const char *mp)
  {
  	char ch = 123;
  	int fd;
  
  	FSTEST_ENTER();
  	RL(fd = rump_sys_open("file", O_CREAT | O_RDWR, 0777));
  	ATF_REQUIRE_EQ(rump_sys_write(fd, &ch, 1), 1);
  	RL(rump_sys_close(fd));
  	RL(fd = rump_sys_open("file", O_RDONLY | O_SYNC | O_RSYNC));
  	ATF_REQUIRE_ERRNO(EFAULT, rump_sys_read(fd, NULL, 1) == -1);
  	RL(rump_sys_close(fd));
  	FSTEST_EXIT();
  }
  
  ATF_TC_FSAPPLY(holywrite, "create a sparse file and fill hole");
  ATF_TC_FSAPPLY(extendfile, "check that extending a file works");
  ATF_TC_FSAPPLY(extendfile_append, "check that extending a file works "
  				  "with a append-only fd (PR kern/44307)");
  ATF_TC_FSAPPLY(overwrite512, "write a 512 byte file twice");
  ATF_TC_FSAPPLY(overwrite64k, "write a 64k byte file twice");
  ATF_TC_FSAPPLY(overwrite_trunc, "write 64k + truncate + rewrite");
  ATF_TC_FSAPPLY(shrinkfile, "shrink file");
  ATF_TC_FSAPPLY(read_after_unlink, "contents can be read off disk after unlink");
  ATF_TC_FSAPPLY(wrrd_after_unlink, "file can be written and read after unlink");
  ATF_TC_FSAPPLY(read_fault, "read at bad address must return EFAULT");
  
  ATF_TP_ADD_TCS(tp)
  {
  
  	ATF_TP_FSAPPLY(holywrite);
  	ATF_TP_FSAPPLY(extendfile);
  	ATF_TP_FSAPPLY(extendfile_append);
  	ATF_TP_FSAPPLY(overwrite512);
  	ATF_TP_FSAPPLY(overwrite64k);
  	ATF_TP_FSAPPLY(overwrite_trunc);
  	ATF_TP_FSAPPLY(shrinkfile);
  	ATF_TP_FSAPPLY(read_after_unlink);
  	ATF_TP_FSAPPLY(wrrd_after_unlink);
  	ATF_TP_FSAPPLY(read_fault);
  
  	return atf_no_error();
  }
  