freebsd-dev/usr.bin/netstat/mbuf.c
Andrey A. Chernov 881377bc7d Add (unsigned) cast to prevent overflow in %
Submitted by:  "Alex G. Bulushev" <bag@demos.su>
1997-11-10 08:03:36 +00:00

152 lines
4.8 KiB
C

/*
* 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. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the University of
* California, Berkeley and its contributors.
* 4. 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.
*/
#ifndef lint
#if 0
static char sccsid[] = "@(#)mbuf.c 8.1 (Berkeley) 6/6/93";
#endif
static const char rcsid[] =
"$Id: mbuf.c,v 1.8 1997/08/17 09:12:43 peter Exp $";
#endif /* not lint */
#include <sys/param.h>
#include <sys/mbuf.h>
#include <sys/protosw.h>
#include <sys/socket.h>
#include <sys/sysctl.h>
#include <err.h>
#include <stdio.h>
#include "netstat.h"
#define YES 1
typedef int bool;
struct mbstat mbstat;
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" },
#ifdef MT_SOCKET
{ MT_SOCKET, "socket structures" }, /* XXX */
#endif
#ifdef MT_PCB
{ MT_PCB, "protocol control blocks" }, /* XXX */
#endif
{ MT_RTABLE, "routing table entries" }, /* XXX */
#ifdef MT_HTABLE
{ MT_HTABLE, "IMP host table entries" }, /* XXX */
#endif
#ifdef MT_ATABLE
{ MT_ATABLE, "address resolution tables" },
#endif
{ MT_FTABLE, "fragment reassembly queue headers" }, /* XXX */
{ MT_SONAME, "socket names and addresses" },
{ MT_SOOPTS, "socket options" },
#ifdef MT_RIGHTS
{ MT_RIGHTS, "access rights" },
#endif
#ifdef MT_IFADDR
{ MT_IFADDR, "interface addresses" }, /* XXX */
#endif
{ 0, 0 }
};
int nmbtypes = sizeof(mbstat.m_mtypes) / sizeof(short);
bool seen[256]; /* "have we seen this type yet?" */
/*
* Print mbuf statistics.
*/
void
mbpr(mbaddr)
u_long mbaddr;
{
register int totmem, totfree, totmbufs;
register int i;
register struct mbtypes *mp;
int name[3];
size_t mbstatlen;
name[0] = CTL_KERN;
name[1] = KERN_IPC;
name[2] = KIPC_MBSTAT;
mbstatlen = sizeof mbstat;
if (sysctl(name, 3, &mbstat, &mbstatlen, 0, 0) < 0) {
warn("sysctl: retrieving mbstat");
return;
}
#undef MSIZE
#define MSIZE (mbstat.m_msize)
#undef MCLBYTES
#define MCLBYTES (mbstat.m_mclbytes)
if (nmbtypes != 256) {
warnx("unexpected change to mbstat; check source");
return;
}
totmbufs = 0;
for (mp = mbtypes; mp->mt_name; mp++)
totmbufs += mbstat.m_mtypes[mp->mt_type];
printf("%u/%u mbufs in use:\n", totmbufs, mbstat.m_mbufs);
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);
}
printf("%lu/%lu mbuf clusters in use\n",
mbstat.m_clusters - mbstat.m_clfree, mbstat.m_clusters);
totmem = mbstat.m_mbufs * MSIZE + mbstat.m_clusters * MCLBYTES;
totfree = mbstat.m_clfree * MCLBYTES +
MSIZE * (mbstat.m_mbufs - totmbufs);
printf("%u Kbytes allocated to network (%d%% in use)\n",
totmem / 1024, (unsigned) (totmem - totfree) * 100 / totmem);
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);
}