1 /* $OpenBSD: mbuf.c,v 1.46 2024/08/29 10:44:40 bluhm 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
50 typedef int bool;
51
52 struct mbstat mbstat;
53 struct kinfo_pool mbpool, mclpools[MCLPOOLS];
54 int mclp;
55 char *mclnames[] = {
56 "mcl2k",
57 "mcl2k2",
58 "mcl4k",
59 "mcl8k",
60 "mcl9k",
61 "mcl12k",
62 "mcl16k",
63 "mcl64k"
64 };
65 char **mclnamep = mclnames;
66
67 static 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
81 int nmbtypes = sizeof(mbstat.m_mtypes) / sizeof(u_long);
82 bool seen[MBSTAT_TYPES]; /* "have we seen this type yet?" */
83
84 /*
85 * Print mbuf statistics.
86 */
87 void
mbpr(void)88 mbpr(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_TYPES) {
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 printf("%lu defrag mbuf allocation\n", mbstat.m_defrag_alloc);
209 printf("%lu prepend mbuf allocation\n", mbstat.m_prepend_alloc);
210 printf("%lu pullup mbuf allocation\n", mbstat.m_pullup_alloc);
211 printf("%lu pullup memory copy\n", mbstat.m_pullup_copy);
212 printf("%lu pulldown mbuf allocation\n", mbstat.m_pulldown_alloc);
213 printf("%lu pulldown memory copy\n", mbstat.m_pulldown_copy);
214 }
215