text: /*	$NetBSD: mbuf.c,v 1.33 2015/07/28 19:46:42 christos Exp $	*/
  
  /*
   * Copyright (c) 1983, 1988, 1993
   *	The Regents of the University of California.  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.
   * 3. Neither the name of the University nor the names of its contributors
   *    may be used to endorse or promote products derived from this software
   *    without specific prior written permission.
   *
   * THIS SOFTWARE IS PROVIDED BY THE REGENTS 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 REGENTS 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/cdefs.h>
  #ifndef lint
  #if 0
  static char sccsid[] = "from: @(#)mbuf.c	8.1 (Berkeley) 6/6/93";
  #else
  __RCSID("$NetBSD: mbuf.c,v 1.33 2015/07/28 19:46:42 christos Exp $");
  #endif
  #endif /* not lint */
  
  #define	__POOL_EXPOSE
  
  #include <sys/param.h>
  #include <sys/protosw.h>
  #include <sys/socket.h>
  #include <sys/mbuf.h>
  #include <sys/pool.h>
  #include <sys/sysctl.h>
  
  #include <stdio.h>
  #include <kvm.h>
  #include <stdlib.h>
  #include <limits.h>
  #include <errno.h>
  #include <err.h>
  #include "netstat.h"
  #include "prog_ops.h"
  
  #define	YES	1
  
  struct	mbstat mbstat;
  struct pool mbpool, mclpool;
  struct pool_allocator mbpa, mclpa;
  
  static struct mbtypes {
  	int		mt_type;
  	const char	*mt_name;
  } mbtypes[] = {
  	{ MT_DATA,	"data" },
  	{ MT_OOBDATA,	"oob data" },
  	{ MT_CONTROL,	"ancillary data" },
  	{ MT_HEADER,	"packet headers" },
  	{ MT_FTABLE,	"fragment reassembly queue headers" },	/* XXX */
  	{ MT_SONAME,	"socket names and addresses" },
  	{ MT_SOOPTS,	"socket options" },
  	{ 0, 0 }
  };
  
  const int nmbtypes = sizeof(mbstat.m_mtypes) / sizeof(short);
  bool seen[256];			/* "have we seen this type yet?" */
  
  int mbstats_ctl[] = { CTL_KERN, KERN_MBUF, MBUF_STATS };
  int mowners_ctl[] = { CTL_KERN, KERN_MBUF, MBUF_MOWNERS };
  
  /*
   * Print mbuf statistics.
   */
  void
  mbpr(u_long mbaddr, u_long msizeaddr, u_long mclbaddr, u_long mbpooladdr,
  	u_long mclpooladdr)
  {
  	u_long totmem, totused, totpct;
  	u_int totmbufs;
  	int i, lines;
  	struct mbtypes *mp;
  	size_t len;
  	void *data;
  	struct mowner_user *mo;
  	int mclbytes, msize;
  
  	if (nmbtypes != 256) {
  		fprintf(stderr,
  		    "%s: unexpected change to mbstat; check source\n",
  		        getprogname());
  		return;
  	}
  
  	if (use_sysctl) {
  		size_t mbstatlen = sizeof(mbstat);
  		if (prog_sysctl(mbstats_ctl,
  			    sizeof(mbstats_ctl) / sizeof(mbstats_ctl[0]),
  			    &mbstat, &mbstatlen, NULL, 0) < 0) {
  			warn("mbstat: sysctl failed");
  			return;
  		}
  		goto printit;
  	}
  
  	if (mbaddr == 0) {
  		fprintf(stderr, "%s: mbstat: symbol not in namelist\n",
  		    getprogname());
  		return;
  	}
  /*XXX*/
  	if (msizeaddr != 0)
  		kread(msizeaddr, (char *)&msize, sizeof (msize));
  	else
  		msize = MSIZE;
  	if (mclbaddr != 0)
  		kread(mclbaddr, (char *)&mclbytes, sizeof (mclbytes));
  	else
  		mclbytes = MCLBYTES;
  /*XXX*/
  
  	if (kread(mbaddr, (char *)&mbstat, sizeof (mbstat)))
  		return;
  
  	if (kread(mbpooladdr, (char *)&mbpool, sizeof (mbpool)))
  		return;
  
  	if (kread(mclpooladdr, (char *)&mclpool, sizeof (mclpool)))
  		return;
  
  	mbpooladdr = (u_long) mbpool.pr_alloc;
  	mclpooladdr = (u_long) mclpool.pr_alloc;
  
  	if (kread(mbpooladdr, (char *)&mbpa, sizeof (mbpa)))
  		return;
  
  	if (kread(mclpooladdr, (char *)&mclpa, sizeof (mclpa)))
  		return;
  
      printit:
  	totmbufs = 0;
  	for (mp = mbtypes; mp->mt_name; mp++)
  		totmbufs += mbstat.m_mtypes[mp->mt_type];
  	printf("%u mbufs in use:\n", totmbufs);
  	for (mp = mbtypes; mp->mt_name; mp++)
  		if (mbstat.m_mtypes[mp->mt_type]) {
  			seen[mp->mt_type] = YES;
  			printf("\t%u mbufs allocated to %s\n",
  			    mbstat.m_mtypes[mp->mt_type], mp->mt_name);
  		}
  	seen[MT_FREE] = YES;
  	for (i = 0; i < nmbtypes; i++)
  		if (!seen[i] && mbstat.m_mtypes[i]) {
  			printf("\t%u mbufs allocated to <mbuf type %d>\n",
  			    mbstat.m_mtypes[i], i);
  		}
  
  	if (use_sysctl)		/* XXX */
  		goto dump_drain;
  
  	printf("%lu/%lu mapped pages in use\n",
  	       (u_long)(mclpool.pr_nget - mclpool.pr_nput),
  	       ((u_long)mclpool.pr_npages * mclpool.pr_itemsperpage));
  	totmem = (mbpool.pr_npages << mbpa.pa_pageshift) +
  	    (mclpool.pr_npages << mclpa.pa_pageshift);
  	totused = (mbpool.pr_nget - mbpool.pr_nput) * mbpool.pr_size +
  	    (mclpool.pr_nget - mclpool.pr_nput) * mclpool.pr_size;
  	if (totmem == 0)
  		totpct = 0;
  	else if (totused < (ULONG_MAX/100))
  		totpct = (totused * 100)/totmem;
  	else {
  		u_long totmem1 = totmem/100;
  		u_long totused1 = totused/100;
  		totpct = (totused1 * 100)/totmem1;
  	}
  	
  	printf("%lu Kbytes allocated to network (%lu%% in use)\n",
  	    totmem / 1024, totpct);
  
  dump_drain:
  	printf("%lu calls to protocol drain routines\n", mbstat.m_drain);
  
   	if (sflag < 2)
  		return;
  
  	if (!use_sysctl)
  		return;
  
  	if (prog_sysctl(mowners_ctl,
  	    sizeof(mowners_ctl)/sizeof(mowners_ctl[0]),
  	    NULL, &len, NULL, 0) < 0) {
  		if (errno == ENOENT)
  			return;
  		warn("mowners: sysctl test");
  		return;
  	}
  	len += 10 * sizeof(*mo);		/* add some slop */
  	data = malloc(len);
  	if (data == NULL) {
  		warn("malloc(%lu)", (u_long)len);
  		return;
  	}
  
  	if (prog_sysctl(mowners_ctl,
  	    sizeof(mowners_ctl)/sizeof(mowners_ctl[0]),
  	    data, &len, NULL, 0) < 0) {
  		warn("mowners: sysctl get");
  		free(data);
  		return;
  	}
  
  	for (mo = (void *) data, lines = 0; len >= sizeof(*mo);
  	    len -= sizeof(*mo), mo++) {
  		char buf[32];
  		if (vflag == 1 &&
  		    mo->mo_counter[MOWNER_COUNTER_CLAIMS] == 0 &&
  		    mo->mo_counter[MOWNER_COUNTER_EXT_CLAIMS] == 0 &&
  		    mo->mo_counter[MOWNER_COUNTER_CLUSTER_CLAIMS] == 0)
  			continue;
  		if (vflag == 0 &&
  		    mo->mo_counter[MOWNER_COUNTER_CLAIMS] ==
  		    mo->mo_counter[MOWNER_COUNTER_RELEASES] &&
  		    mo->mo_counter[MOWNER_COUNTER_EXT_CLAIMS] ==
  		    mo->mo_counter[MOWNER_COUNTER_EXT_RELEASES] &&
  		    mo->mo_counter[MOWNER_COUNTER_CLUSTER_CLAIMS] ==
  		    mo->mo_counter[MOWNER_COUNTER_CLUSTER_RELEASES])
  			continue;
  		snprintf(buf, sizeof(buf), "%16s %-13s",
  		    mo->mo_name, mo->mo_descr);
  		if ((lines % 24) == 0 || lines > 24) {
  			printf("%30s %-8s %10s %10s %10s\n",
  			    "", "", "small", "ext", "cluster");
  			lines = 1;
  		}
  		printf("%30s %-8s %10lu %10lu %10lu\n",
  		    buf, "inuse",
  		    mo->mo_counter[MOWNER_COUNTER_CLAIMS] -
  		    mo->mo_counter[MOWNER_COUNTER_RELEASES],
  		    mo->mo_counter[MOWNER_COUNTER_EXT_CLAIMS] -
  		    mo->mo_counter[MOWNER_COUNTER_EXT_RELEASES],
  		    mo->mo_counter[MOWNER_COUNTER_CLUSTER_CLAIMS] -
  		    mo->mo_counter[MOWNER_COUNTER_CLUSTER_RELEASES]);
  		lines++;
  		if (vflag) {
  			printf("%30s %-8s %10lu %10lu %10lu\n",
  			    "", "claims",
  			    mo->mo_counter[MOWNER_COUNTER_CLAIMS],
  			    mo->mo_counter[MOWNER_COUNTER_EXT_CLAIMS],
  			    mo->mo_counter[MOWNER_COUNTER_CLUSTER_CLAIMS]);
  			printf("%30s %-8s %10lu %10lu %10lu\n",
  			    "", "releases",
  			    mo->mo_counter[MOWNER_COUNTER_RELEASES],
  			    mo->mo_counter[MOWNER_COUNTER_EXT_RELEASES],
  			    mo->mo_counter[MOWNER_COUNTER_CLUSTER_RELEASES]);
  			lines += 2;
  		}
  	}
  	free(data);
  }
  