1 /* $OpenBSD: mbuf.c,v 1.30 2009/06/25 22:31:18 deraadt 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/param.h> 34 #include <sys/protosw.h> 35 #include <sys/socket.h> 36 #include <sys/mbuf.h> 37 #include <sys/pool.h> 38 #include <sys/sysctl.h> 39 #include <net/if.h> 40 41 #include <errno.h> 42 #include <kvm.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 pool mbpool, mclpools[MCLPOOLS]; 54 int mclp; 55 char *mclnames[] = { 56 "mcl2k", "mcl4k", "mcl8k", "mcl9k", "mcl12k", "mcl16k", "mcl64k" 57 }; 58 char **mclnamep = mclnames; 59 60 extern kvm_t *kvmd; 61 62 static struct mbtypes { 63 int mt_type; 64 char *mt_name; 65 } mbtypes[] = { 66 { MT_DATA, "data" }, 67 { MT_OOBDATA, "oob data" }, 68 { MT_CONTROL, "ancillary data" }, 69 { MT_HEADER, "packet headers" }, 70 { MT_FTABLE, "fragment reassembly queue headers" }, /* XXX */ 71 { MT_SONAME, "socket names and addresses" }, 72 { MT_SOOPTS, "socket options" }, 73 { 0, 0 } 74 }; 75 76 int nmbtypes = sizeof(mbstat.m_mtypes) / sizeof(short); 77 bool seen[256]; /* "have we seen this type yet?" */ 78 79 /* 80 * Print mbuf statistics. 81 */ 82 void 83 mbpr(void) 84 { 85 unsigned long totmem, totused, totmbufs; 86 int totpct; 87 int i, mib[4], npools; 88 struct pool pool; 89 struct mbtypes *mp; 90 size_t size; 91 int page_size = getpagesize(); 92 93 if (nmbtypes != 256) { 94 fprintf(stderr, 95 "%s: unexpected change to mbstat; check source\n", 96 __progname); 97 return; 98 } 99 100 mib[0] = CTL_KERN; 101 mib[1] = KERN_MBSTAT; 102 size = sizeof(mbstat); 103 104 if (sysctl(mib, 2, &mbstat, &size, NULL, 0) < 0) { 105 printf("Can't retrieve mbuf statistics from the kernel: %s\n", 106 strerror(errno)); 107 return; 108 } 109 110 mib[0] = CTL_KERN; 111 mib[1] = KERN_POOL; 112 mib[2] = KERN_POOL_NPOOLS; 113 size = sizeof(npools); 114 115 if (sysctl(mib, 3, &npools, &size, NULL, 0) < 0) { 116 printf("Can't figure out number of pools in kernel: %s\n", 117 strerror(errno)); 118 return; 119 } 120 121 for (i = 1; npools; i++) { 122 char name[32]; 123 124 mib[0] = CTL_KERN; 125 mib[1] = KERN_POOL; 126 mib[2] = KERN_POOL_POOL; 127 mib[3] = i; 128 size = sizeof(struct pool); 129 if (sysctl(mib, 4, &pool, &size, NULL, 0) < 0) { 130 if (errno == ENOENT) 131 continue; 132 printf("error getting pool: %s\n", 133 strerror(errno)); 134 return; 135 } 136 npools--; 137 mib[2] = KERN_POOL_NAME; 138 size = sizeof(name); 139 if (sysctl(mib, 4, &name, &size, NULL, 0) < 0) { 140 printf("error getting pool name: %s\n", 141 strerror(errno)); 142 return; 143 } 144 145 if (!strncmp(name, "mbpl", strlen("mbpl"))) 146 bcopy(&pool, &mbpool, sizeof(struct pool)); 147 else if (mclp < sizeof(mclpools) / sizeof(mclpools[0]) && 148 !strncmp(name, *mclnamep, strlen(*mclnamep))) { 149 bcopy(&pool, &mclpools[mclp++], 150 sizeof(struct pool)); 151 mclnamep++; 152 } 153 } 154 155 totmbufs = 0; 156 for (mp = mbtypes; mp->mt_name; mp++) 157 totmbufs += (unsigned int)mbstat.m_mtypes[mp->mt_type]; 158 printf("%lu mbuf%s in use:\n", totmbufs, plural(totmbufs)); 159 for (mp = mbtypes; mp->mt_name; mp++) 160 if (mbstat.m_mtypes[mp->mt_type]) { 161 seen[mp->mt_type] = YES; 162 printf("\t%u mbuf%s allocated to %s\n", 163 mbstat.m_mtypes[mp->mt_type], 164 plural(mbstat.m_mtypes[mp->mt_type]), 165 mp->mt_name); 166 } 167 seen[MT_FREE] = YES; 168 for (i = 0; i < nmbtypes; i++) 169 if (!seen[i] && mbstat.m_mtypes[i]) { 170 printf("\t%u mbuf%s allocated to <mbuf type %d>\n", 171 mbstat.m_mtypes[i], 172 plural(mbstat.m_mtypes[i]), i); 173 } 174 totmem = (mbpool.pr_npages * (unsigned long)page_size); 175 totused = mbpool.pr_nout * mbpool.pr_size; 176 for (i = 0; i < mclp; i++) { 177 printf("%u/%lu/%lu mbuf %d byte clusters in use (current/peak/max)\n", 178 mclpools[i].pr_nout, 179 (u_long)mclpools[i].pr_hiwat * mclpools[i].pr_itemsperpage, 180 (u_long)mclpools[i].pr_maxpages * mclpools[i].pr_itemsperpage, 181 mclpools[i].pr_size); 182 totmem += (mclpools[i].pr_npages * (unsigned long)page_size); 183 totused += mclpools[i].pr_nout * mclpools[i].pr_size; 184 } 185 186 totpct = (totmem == 0)? 0 : (totused/(totmem / 100)); 187 printf("%lu Kbytes allocated to network (%d%% in use)\n", 188 totmem / 1024, totpct); 189 printf("%lu requests for memory denied\n", mbstat.m_drops); 190 printf("%lu requests for memory delayed\n", mbstat.m_wait); 191 printf("%lu calls to protocol drain routines\n", mbstat.m_drain); 192 } 193