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/* $OpenBSD: mbuf.c,v 1.30 2009/06/25 22:31:18 deraadt Exp $ */
/* $NetBSD: mbuf.c,v 1.9 1996/05/07 02:55:03 thorpej 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/param.h>
#include <sys/protosw.h>
#include <sys/socket.h>
#include <sys/mbuf.h>
#include <sys/pool.h>
#include <sys/sysctl.h>
#include <net/if.h>
#include <errno.h>
#include <kvm.h>
#include <limits.h>
#include <stdio.h>
#include <string.h>
#include <unistd.h>
#include "netstat.h"
#define YES 1
typedef int bool;
struct mbstat mbstat;
struct pool mbpool, mclpools[MCLPOOLS];
int mclp;
char *mclnames[] = {
"mcl2k", "mcl4k", "mcl8k", "mcl9k", "mcl12k", "mcl16k", "mcl64k"
};
char **mclnamep = mclnames;
extern kvm_t *kvmd;
static struct mbtypes {
int mt_type;
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 }
};
int nmbtypes = sizeof(mbstat.m_mtypes) / sizeof(short);
bool seen[256]; /* "have we seen this type yet?" */
/*
* Print mbuf statistics.
*/
void
mbpr(void)
{
unsigned long totmem, totused, totmbufs;
int totpct;
int i, mib[4], npools;
struct pool pool;
struct mbtypes *mp;
size_t size;
int page_size = getpagesize();
if (nmbtypes != 256) {
fprintf(stderr,
"%s: unexpected change to mbstat; check source\n",
__progname);
return;
}
mib[0] = CTL_KERN;
mib[1] = KERN_MBSTAT;
size = sizeof(mbstat);
if (sysctl(mib, 2, &mbstat, &size, NULL, 0) < 0) {
printf("Can't retrieve mbuf statistics from the kernel: %s\n",
strerror(errno));
return;
}
mib[0] = CTL_KERN;
mib[1] = KERN_POOL;
mib[2] = KERN_POOL_NPOOLS;
size = sizeof(npools);
if (sysctl(mib, 3, &npools, &size, NULL, 0) < 0) {
printf("Can't figure out number of pools in kernel: %s\n",
strerror(errno));
return;
}
for (i = 1; npools; i++) {
char name[32];
mib[0] = CTL_KERN;
mib[1] = KERN_POOL;
mib[2] = KERN_POOL_POOL;
mib[3] = i;
size = sizeof(struct pool);
if (sysctl(mib, 4, &pool, &size, NULL, 0) < 0) {
if (errno == ENOENT)
continue;
printf("error getting pool: %s\n",
strerror(errno));
return;
}
npools--;
mib[2] = KERN_POOL_NAME;
size = sizeof(name);
if (sysctl(mib, 4, &name, &size, NULL, 0) < 0) {
printf("error getting pool name: %s\n",
strerror(errno));
return;
}
if (!strncmp(name, "mbpl", strlen("mbpl")))
bcopy(&pool, &mbpool, sizeof(struct pool));
else if (mclp < sizeof(mclpools) / sizeof(mclpools[0]) &&
!strncmp(name, *mclnamep, strlen(*mclnamep))) {
bcopy(&pool, &mclpools[mclp++],
sizeof(struct pool));
mclnamep++;
}
}
totmbufs = 0;
for (mp = mbtypes; mp->mt_name; mp++)
totmbufs += (unsigned int)mbstat.m_mtypes[mp->mt_type];
printf("%lu mbuf%s in use:\n", totmbufs, plural(totmbufs));
for (mp = mbtypes; mp->mt_name; mp++)
if (mbstat.m_mtypes[mp->mt_type]) {
seen[mp->mt_type] = YES;
printf("\t%u mbuf%s allocated to %s\n",
mbstat.m_mtypes[mp->mt_type],
plural(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 mbuf%s allocated to <mbuf type %d>\n",
mbstat.m_mtypes[i],
plural(mbstat.m_mtypes[i]), i);
}
totmem = (mbpool.pr_npages * (unsigned long)page_size);
totused = mbpool.pr_nout * mbpool.pr_size;
for (i = 0; i < mclp; i++) {
printf("%u/%lu/%lu mbuf %d byte clusters in use (current/peak/max)\n",
mclpools[i].pr_nout,
(u_long)mclpools[i].pr_hiwat * mclpools[i].pr_itemsperpage,
(u_long)mclpools[i].pr_maxpages * mclpools[i].pr_itemsperpage,
mclpools[i].pr_size);
totmem += (mclpools[i].pr_npages * (unsigned long)page_size);
totused += mclpools[i].pr_nout * mclpools[i].pr_size;
}
totpct = (totmem == 0)? 0 : (totused/(totmem / 100));
printf("%lu Kbytes allocated to network (%d%% in use)\n",
totmem / 1024, totpct);
printf("%lu requests for memory denied\n", mbstat.m_drops);
printf("%lu requests for memory delayed\n", mbstat.m_wait);
printf("%lu calls to protocol drain routines\n", mbstat.m_drain);
}
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