1/*	$OpenBSD: mbuf.c,v 1.45 2023/07/16 03:01:31 yasuoka Exp $	*/
2/*	$NetBSD: mbuf.c,v 1.9 1996/05/07 02:55:03 thorpej Exp $	*/
3
4/*
5 * Copyright (c) 1983, 1988, 1993
6 *	The Regents of the University of California.  All rights reserved.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
11 * 1. Redistributions of source code must retain the above copyright
12 *    notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 *    notice, this list of conditions and the following disclaimer in the
15 *    documentation and/or other materials provided with the distribution.
16 * 3. Neither the name of the University nor the names of its contributors
17 *    may be used to endorse or promote products derived from this software
18 *    without specific prior written permission.
19 *
20 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
23 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
24 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
30 * SUCH DAMAGE.
31 */
32
33#include <sys/socket.h>
34#include <sys/queue.h>
35#include <sys/mbuf.h>
36#include <sys/protosw.h>
37#include <sys/pool.h>
38#include <sys/sysctl.h>
39#include <net/if.h>
40#include <netinet/in.h>
41
42#include <errno.h>
43#include <limits.h>
44#include <stdio.h>
45#include <string.h>
46#include <unistd.h>
47#include "netstat.h"
48
49#define	YES	1
50typedef int bool;
51
52struct	mbstat mbstat;
53struct kinfo_pool mbpool, mclpools[MCLPOOLS];
54int	mclp;
55char	*mclnames[] = {
56	"mcl2k",
57	"mcl2k2",
58	"mcl4k",
59	"mcl8k",
60	"mcl9k",
61	"mcl12k",
62	"mcl16k",
63	"mcl64k"
64};
65char	**mclnamep = mclnames;
66
67static struct mbtypes {
68	int	mt_type;
69	char	*mt_name;
70} mbtypes[] = {
71	{ MT_DATA,	"data" },
72	{ MT_OOBDATA,	"oob data" },
73	{ MT_CONTROL,	"ancillary data" },
74	{ MT_HEADER,	"packet headers" },
75	{ MT_FTABLE,	"fragment reassembly queue headers" },	/* XXX */
76	{ MT_SONAME,	"socket names and addresses" },
77	{ MT_SOOPTS,	"socket options" },
78	{ 0, 0 }
79};
80
81int nmbtypes = sizeof(mbstat.m_mtypes) / sizeof(u_long);
82bool seen[MBSTAT_COUNT];		/* "have we seen this type yet?" */
83
84/*
85 * Print mbuf statistics.
86 */
87void
88mbpr(void)
89{
90	unsigned long totmem, totpeak, totmbufs;
91	int i, maxclusters, mib[4], npools;
92	struct kinfo_pool pool;
93	struct mbtypes *mp;
94	size_t size;
95
96	if (nmbtypes != MBSTAT_COUNT) {
97		fprintf(stderr,
98		    "%s: unexpected change to mbstat; check source\n",
99		    __progname);
100		return;
101	}
102
103	mib[0] = CTL_KERN;
104	mib[1] = KERN_MAXCLUSTERS;
105	size = sizeof(maxclusters);
106
107	if (sysctl(mib, 2, &maxclusters, &size, NULL, 0) == -1) {
108		printf("Can't retrieve value of maxclusters from the "
109		    "kernel: %s\n",  strerror(errno));
110		return;
111	}
112
113	mib[0] = CTL_KERN;
114	mib[1] = KERN_MBSTAT;
115	size = sizeof(mbstat);
116
117	if (sysctl(mib, 2, &mbstat, &size, NULL, 0) == -1) {
118		printf("Can't retrieve mbuf statistics from the kernel: %s\n",
119		    strerror(errno));
120		return;
121	}
122
123	mib[0] = CTL_KERN;
124	mib[1] = KERN_POOL;
125	mib[2] = KERN_POOL_NPOOLS;
126	size = sizeof(npools);
127
128	if (sysctl(mib, 3, &npools, &size, NULL, 0) == -1) {
129		printf("Can't figure out number of pools in kernel: %s\n",
130		    strerror(errno));
131		return;
132	}
133
134	for (i = 1; npools; i++) {
135		char name[32];
136
137		mib[0] = CTL_KERN;
138		mib[1] = KERN_POOL;
139		mib[2] = KERN_POOL_POOL;
140		mib[3] = i;
141		size = sizeof(pool);
142		if (sysctl(mib, 4, &pool, &size, NULL, 0) == -1) {
143			if (errno == ENOENT)
144				continue;
145			printf("error getting pool: %s\n",
146			    strerror(errno));
147			return;
148		}
149		npools--;
150		mib[2] = KERN_POOL_NAME;
151		size = sizeof(name);
152		if (sysctl(mib, 4, &name, &size, NULL, 0) == -1) {
153			printf("error getting pool name: %s\n",
154			    strerror(errno));
155			return;
156		}
157
158		if (!strncmp(name, "mbufpl", strlen("mbufpl")))
159			bcopy(&pool, &mbpool, sizeof(pool));
160		else if (mclp < sizeof(mclpools) / sizeof(mclpools[0]) &&
161		    !strncmp(name, *mclnamep, strlen(*mclnamep))) {
162			bcopy(&pool, &mclpools[mclp++],
163			    sizeof(pool));
164			mclnamep++;
165		}
166	}
167
168	totmbufs = 0;
169	for (mp = mbtypes; mp->mt_name; mp++)
170		totmbufs += (unsigned int)mbstat.m_mtypes[mp->mt_type];
171	printf("%lu mbuf%s in use:\n", totmbufs, plural(totmbufs));
172	for (mp = mbtypes; mp->mt_name; mp++)
173		if (mbstat.m_mtypes[mp->mt_type]) {
174			seen[mp->mt_type] = YES;
175			printf("\t%lu mbuf%s allocated to %s\n",
176			    mbstat.m_mtypes[mp->mt_type],
177			    plural(mbstat.m_mtypes[mp->mt_type]),
178			    mp->mt_name);
179		}
180	seen[MT_FREE] = YES;
181	for (i = 0; i < nmbtypes; i++)
182		if (!seen[i] && mbstat.m_mtypes[i]) {
183			printf("\t%lu mbuf%s allocated to <mbuf type %d>\n",
184			    mbstat.m_mtypes[i],
185			    plural(mbstat.m_mtypes[i]), i);
186		}
187	totmem = (unsigned long)mbpool.pr_npages * mbpool.pr_pgsize;
188	totpeak = (unsigned long)mbpool.pr_hiwat * mbpool.pr_pgsize;
189	for (i = 0; i < mclp; i++) {
190		printf("%u/%lu mbuf %d byte clusters in use"
191		    " (current/peak)\n",
192		    mclpools[i].pr_nout,
193		    (unsigned long)
194		    mclpools[i].pr_hiwat * mclpools[i].pr_itemsperpage,
195		    mclpools[i].pr_size);
196		totmem += (unsigned long)
197		    mclpools[i].pr_npages * mclpools[i].pr_pgsize;
198		totpeak += (unsigned long)
199		    mclpools[i].pr_hiwat * mclpools[i].pr_pgsize;
200	}
201
202	printf("%lu/%lu/%lu Kbytes allocated to network "
203	    "(current/peak/max)\n", totmem / 1024, totpeak / 1024,
204	    ((unsigned long)maxclusters * MCLBYTES) / 1024);
205	printf("%lu requests for memory denied\n", mbstat.m_drops);
206	printf("%lu requests for memory delayed\n", mbstat.m_wait);
207	printf("%lu calls to protocol drain routines\n", mbstat.m_drain);
208}
209