mbuf.c revision 23086 
1/*
2 * Copyright (c) 1983, 1988, 1993
3 *	The Regents of the University of California.  All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 *    notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 *    notice, this list of conditions and the following disclaimer in the
12 *    documentation and/or other materials provided with the distribution.
13 * 3. All advertising materials mentioning features or use of this software
14 *    must display the following acknowledgement:
15 *	This product includes software developed by the University of
16 *	California, Berkeley and its contributors.
17 * 4. Neither the name of the University nor the names of its contributors
18 *    may be used to endorse or promote products derived from this software
19 *    without specific prior written permission.
20 *
21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
31 * SUCH DAMAGE.
32 */
33
34#ifndef lint
35static char sccsid[] = "@(#)mbuf.c	8.1 (Berkeley) 6/6/93";
36#endif /* not lint */
37
38#include <sys/param.h>
39#include <sys/mbuf.h>
40#include <sys/protosw.h>
41#include <sys/socket.h>
42#include <sys/sysctl.h>
43
44#include <stdio.h>
45#include "netstat.h"
46
47#define	YES	1
48typedef int bool;
49
50struct	mbstat mbstat;
51
52static struct mbtypes {
53	int	mt_type;
54	char	*mt_name;
55} mbtypes[] = {
56	{ MT_DATA,	"data" },
57	{ MT_OOBDATA,	"oob data" },
58	{ MT_CONTROL,	"ancillary data" },
59	{ MT_HEADER,	"packet headers" },
60	{ MT_SOCKET,	"socket structures" },			/* XXX */
61	{ MT_PCB,	"protocol control blocks" },		/* XXX */
62	{ MT_RTABLE,	"routing table entries" },		/* XXX */
63	{ MT_HTABLE,	"IMP host table entries" },		/* XXX */
64	{ MT_ATABLE,	"address resolution tables" },
65	{ MT_FTABLE,	"fragment reassembly queue headers" },	/* XXX */
66	{ MT_SONAME,	"socket names and addresses" },
67	{ MT_SOOPTS,	"socket options" },
68	{ MT_RIGHTS,	"access rights" },
69	{ MT_IFADDR,	"interface addresses" },		/* XXX */
70	{ 0, 0 }
71};
72
73int nmbtypes = sizeof(mbstat.m_mtypes) / sizeof(short);
74bool seen[256];			/* "have we seen this type yet?" */
75
76/*
77 * Print mbuf statistics.
78 */
79void
80mbpr(mbaddr)
81	u_long mbaddr;
82{
83	register int totmem, totfree, totmbufs;
84	register int i;
85	register struct mbtypes *mp;
86	int name[3];
87	size_t mbstatlen;
88
89	name[0] = CTL_KERN;
90	name[1] = KERN_IPC;
91	name[2] = KIPC_MBSTAT;
92	mbstatlen = sizeof mbstat;
93
94	if (sysctl(name, 3, &mbstat, &mbstatlen, 0, 0) < 0) {
95		warn("sysctl: retrieving mbstat");
96		return;
97	}
98#undef MSIZE
99#define MSIZE		(mbstat.m_msize)
100#undef MCLBYTES
101#define	MCLBYTES	(mbstat.m_mclbytes)
102
103	if (nmbtypes != 256) {
104		warnx("unexpected change to mbstat; check source");
105		return;
106	}
107
108	totmbufs = 0;
109	for (mp = mbtypes; mp->mt_name; mp++)
110		totmbufs += mbstat.m_mtypes[mp->mt_type];
111	printf("%u/%u mbufs in use:\n", totmbufs, mbstat.m_mbufs);
112	for (mp = mbtypes; mp->mt_name; mp++)
113		if (mbstat.m_mtypes[mp->mt_type]) {
114			seen[mp->mt_type] = YES;
115			printf("\t%u mbufs allocated to %s\n",
116			    mbstat.m_mtypes[mp->mt_type], mp->mt_name);
117		}
118	seen[MT_FREE] = YES;
119	for (i = 0; i < nmbtypes; i++)
120		if (!seen[i] && mbstat.m_mtypes[i]) {
121			printf("\t%u mbufs allocated to <mbuf type %d>\n",
122			    mbstat.m_mtypes[i], i);
123		}
124	printf("%lu/%lu mbuf clusters in use\n",
125		mbstat.m_clusters - mbstat.m_clfree, mbstat.m_clusters);
126	totmem = mbstat.m_mbufs * MSIZE + mbstat.m_clusters * MCLBYTES;
127	totfree = mbstat.m_clfree * MCLBYTES +
128		MSIZE * (mbstat.m_mbufs - totmbufs);
129	printf("%u Kbytes allocated to network (%d%% in use)\n",
130		totmem / 1024, (totmem - totfree) * 100 / totmem);
131	printf("%lu requests for memory denied\n", mbstat.m_drops);
132	printf("%lu requests for memory delayed\n", mbstat.m_wait);
133	printf("%lu calls to protocol drain routines\n", mbstat.m_drain);
134}
135