Annotation of src/usr.bin/netstat/mbuf.c, Revision 1.19
1.19 ! millert 1: /* $OpenBSD: mbuf.c,v 1.18 2003/03/21 16:55:23 pb Exp $ */
1.2 deraadt 2: /* $NetBSD: mbuf.c,v 1.9 1996/05/07 02:55:03 thorpej Exp $ */
1.1 deraadt 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.
1.19 ! millert 16: * 3. Neither the name of the University nor the names of its contributors
1.1 deraadt 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: #ifndef lint
34: #if 0
35: static char sccsid[] = "from: @(#)mbuf.c 8.1 (Berkeley) 6/6/93";
36: #else
1.19 ! millert 37: static char *rcsid = "$OpenBSD: mbuf.c,v 1.18 2003/03/21 16:55:23 pb Exp $";
1.1 deraadt 38: #endif
39: #endif /* not lint */
1.8 provos 40:
1.1 deraadt 41: #include <sys/param.h>
42: #include <sys/protosw.h>
43: #include <sys/socket.h>
44: #include <sys/mbuf.h>
1.8 provos 45: #include <sys/pool.h>
1.13 angelos 46: #include <sys/sysctl.h>
47: #include <sys/errno.h>
1.1 deraadt 48:
1.13 angelos 49: #include <kvm.h>
1.5 millert 50: #include <limits.h>
1.1 deraadt 51: #include <stdio.h>
1.14 deraadt 52: #include <string.h>
1.17 deraadt 53: #include <unistd.h>
1.1 deraadt 54: #include "netstat.h"
55:
56: #define YES 1
57: typedef int bool;
58:
59: struct mbstat mbstat;
1.8 provos 60: struct pool mbpool, mclpool;
61:
1.13 angelos 62: extern kvm_t *kvmd;
1.1 deraadt 63:
64: static struct mbtypes {
65: int mt_type;
66: char *mt_name;
67: } mbtypes[] = {
68: { MT_DATA, "data" },
69: { MT_OOBDATA, "oob data" },
70: { MT_CONTROL, "ancillary data" },
71: { MT_HEADER, "packet headers" },
72: { MT_FTABLE, "fragment reassembly queue headers" }, /* XXX */
73: { MT_SONAME, "socket names and addresses" },
74: { MT_SOOPTS, "socket options" },
75: { 0, 0 }
76: };
77:
78: int nmbtypes = sizeof(mbstat.m_mtypes) / sizeof(short);
79: bool seen[256]; /* "have we seen this type yet?" */
80:
81: /*
82: * Print mbuf statistics.
83: */
84: void
1.17 deraadt 85: mbpr(u_long mbaddr, u_long mbpooladdr, u_long mclpooladdr)
1.1 deraadt 86: {
1.9 mpech 87: int totmem, totused, totmbufs, totpct;
1.13 angelos 88: int i, mib[4], npools, flag = 0;
89: struct pool pool;
1.9 mpech 90: struct mbtypes *mp;
1.13 angelos 91: size_t size;
1.10 art 92: int page_size = getpagesize();
1.1 deraadt 93:
94: if (nmbtypes != 256) {
95: fprintf(stderr,
1.2 deraadt 96: "%s: unexpected change to mbstat; check source\n",
1.11 mickey 97: __progname);
1.1 deraadt 98: return;
99: }
1.13 angelos 100:
101: if (kvmd == NULL) {
102: if (mbaddr == 0) {
103: fprintf(stderr, "%s: mbstat: symbol not in namelist\n",
104: __progname);
105: return;
106: }
107:
108: if (kread(mbaddr, (char *)&mbstat, sizeof (mbstat)))
109: return;
110: if (kread(mbpooladdr, (char *)&mbpool, sizeof (mbpool)))
111: return;
112:
113: if (kread(mclpooladdr, (char *)&mclpool, sizeof (mclpool)))
114: return;
115: } else {
1.16 angelos 116: mib[0] = CTL_KERN;
117: mib[1] = KERN_MBSTAT;
118: size = sizeof(mbstat);
119:
120: if (sysctl(mib, 2, &mbstat, &size, NULL, 0) < 0) {
121: printf("Can't retrieve mbuf statistics from the kernel: %s\n",
122: strerror(errno));
123: return;
124: }
125:
1.13 angelos 126: mib[0] = CTL_KERN;
127: mib[1] = KERN_POOL;
1.15 angelos 128: mib[2] = KERN_POOL_NPOOLS;
1.13 angelos 129: size = sizeof(npools);
130:
131: if (sysctl(mib, 3, &npools, &size, NULL, 0) < 0) {
132: printf("Can't figure out number of pools in kernel: %s\n",
133: strerror(errno));
134: return;
135: }
136:
137: for (i = 1; npools; i++) {
138: char name[32];
139:
140: mib[0] = CTL_KERN;
141: mib[1] = KERN_POOL;
142: mib[2] = KERN_POOL_POOL;
143: mib[3] = i;
144: size = sizeof(struct pool);
145: if (sysctl(mib, 4, &pool, &size, NULL, 0) < 0) {
146: if (errno == ENOENT)
147: continue;
148: printf("error getting pool: %s\n",
149: strerror(errno));
150: return;
151: }
152: npools--;
153: mib[2] = KERN_POOL_NAME;
154: size = sizeof(name);
155: if (sysctl(mib, 4, &name, &size, NULL, 0) < 0) {
156: printf("error getting pool name: %s\n",
157: strerror(errno));
158: return;
159: }
160:
161: if (!strncmp(name, "mbpl", strlen("mbpl"))) {
162: bcopy(&pool, &mbpool, sizeof(struct pool));
163: flag++;
164: } else {
165: if (!strncmp(name, "mclpl", strlen("mclpl"))) {
166: bcopy(&pool, &mclpool,
167: sizeof(struct pool));
168: flag++;
169: }
170: }
171:
172: if (flag == 2)
173: break;
174: }
1.1 deraadt 175: }
1.8 provos 176:
1.1 deraadt 177: totmbufs = 0;
178: for (mp = mbtypes; mp->mt_name; mp++)
179: totmbufs += mbstat.m_mtypes[mp->mt_type];
1.6 denny 180: printf("%u mbuf%s in use:\n", totmbufs, plural(totmbufs));
1.1 deraadt 181: for (mp = mbtypes; mp->mt_name; mp++)
182: if (mbstat.m_mtypes[mp->mt_type]) {
183: seen[mp->mt_type] = YES;
1.6 denny 184: printf("\t%u mbuf%s allocated to %s\n",
185: mbstat.m_mtypes[mp->mt_type],
186: plural((int)mbstat.m_mtypes[mp->mt_type]),
187: mp->mt_name);
1.1 deraadt 188: }
189: seen[MT_FREE] = YES;
190: for (i = 0; i < nmbtypes; i++)
191: if (!seen[i] && mbstat.m_mtypes[i]) {
1.6 denny 192: printf("\t%u mbuf%s allocated to <mbuf type %d>\n",
193: mbstat.m_mtypes[i],
194: plural((int)mbstat.m_mtypes[i]), i);
1.1 deraadt 195: }
1.18 pb 196: printf("%lu/%lu/%lu mbuf cluster pages in use (current/peak/max)\n",
1.11 mickey 197: (u_long)(mclpool.pr_nget - mclpool.pr_nput),
1.18 pb 198: (u_long)mclpool.pr_hiwat, (u_long)mclpool.pr_maxpages);
1.10 art 199: totmem = (mbpool.pr_npages * page_size) +
200: (mclpool.pr_npages * page_size);
1.11 mickey 201: totused = (mbpool.pr_nget - mbpool.pr_nput) * mbpool.pr_size +
1.8 provos 202: (mclpool.pr_nget - mclpool.pr_nput) * mclpool.pr_size;
203: totpct = (totmem == 0)? 0 : ((totused * 100)/totmem);
1.1 deraadt 204: printf("%u Kbytes allocated to network (%d%% in use)\n",
1.8 provos 205: totmem / 1024, totpct);
1.4 millert 206: printf("%lu requests for memory denied\n", mbstat.m_drops);
207: printf("%lu requests for memory delayed\n", mbstat.m_wait);
208: printf("%lu calls to protocol drain routines\n", mbstat.m_drain);
1.1 deraadt 209: }
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