1 /* $OpenBSD: mbuf.c,v 1.31 2010/07/08 08:47:07 lum 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 <limits.h> 43 #include <stdio.h> 44 #include <string.h> 45 #include <unistd.h> 46 #include "netstat.h" 47 48 #define YES 1 49 typedef int bool; 50 51 struct mbstat mbstat; 52 struct pool mbpool, mclpools[MCLPOOLS]; 53 int mclp; 54 char *mclnames[] = { 55 "mcl2k", "mcl4k", "mcl8k", "mcl9k", "mcl12k", "mcl16k", "mcl64k" 56 }; 57 char **mclnamep = mclnames; 58 59 static struct mbtypes { 60 int mt_type; 61 char *mt_name; 62 } mbtypes[] = { 63 { MT_DATA, "data" }, 64 { MT_OOBDATA, "oob data" }, 65 { MT_CONTROL, "ancillary data" }, 66 { MT_HEADER, "packet headers" }, 67 { MT_FTABLE, "fragment reassembly queue headers" }, /* XXX */ 68 { MT_SONAME, "socket names and addresses" }, 69 { MT_SOOPTS, "socket options" }, 70 { 0, 0 } 71 }; 72 73 int nmbtypes = sizeof(mbstat.m_mtypes) / sizeof(short); 74 bool seen[256]; /* "have we seen this type yet?" */ 75 76 /* 77 * Print mbuf statistics. 78 */ 79 void 80 mbpr(void) 81 { 82 unsigned long totmem, totused, totmbufs; 83 int totpct; 84 int i, mib[4], npools; 85 struct pool pool; 86 struct mbtypes *mp; 87 size_t size; 88 int page_size = getpagesize(); 89 90 if (nmbtypes != 256) { 91 fprintf(stderr, 92 "%s: unexpected change to mbstat; check source\n", 93 __progname); 94 return; 95 } 96 97 mib[0] = CTL_KERN; 98 mib[1] = KERN_MBSTAT; 99 size = sizeof(mbstat); 100 101 if (sysctl(mib, 2, &mbstat, &size, NULL, 0) < 0) { 102 printf("Can't retrieve mbuf statistics from the kernel: %s\n", 103 strerror(errno)); 104 return; 105 } 106 107 mib[0] = CTL_KERN; 108 mib[1] = KERN_POOL; 109 mib[2] = KERN_POOL_NPOOLS; 110 size = sizeof(npools); 111 112 if (sysctl(mib, 3, &npools, &size, NULL, 0) < 0) { 113 printf("Can't figure out number of pools in kernel: %s\n", 114 strerror(errno)); 115 return; 116 } 117 118 for (i = 1; npools; i++) { 119 char name[32]; 120 121 mib[0] = CTL_KERN; 122 mib[1] = KERN_POOL; 123 mib[2] = KERN_POOL_POOL; 124 mib[3] = i; 125 size = sizeof(struct pool); 126 if (sysctl(mib, 4, &pool, &size, NULL, 0) < 0) { 127 if (errno == ENOENT) 128 continue; 129 printf("error getting pool: %s\n", 130 strerror(errno)); 131 return; 132 } 133 npools--; 134 mib[2] = KERN_POOL_NAME; 135 size = sizeof(name); 136 if (sysctl(mib, 4, &name, &size, NULL, 0) < 0) { 137 printf("error getting pool name: %s\n", 138 strerror(errno)); 139 return; 140 } 141 142 if (!strncmp(name, "mbpl", strlen("mbpl"))) 143 bcopy(&pool, &mbpool, sizeof(struct pool)); 144 else if (mclp < sizeof(mclpools) / sizeof(mclpools[0]) && 145 !strncmp(name, *mclnamep, strlen(*mclnamep))) { 146 bcopy(&pool, &mclpools[mclp++], 147 sizeof(struct pool)); 148 mclnamep++; 149 } 150 } 151 152 totmbufs = 0; 153 for (mp = mbtypes; mp->mt_name; mp++) 154 totmbufs += (unsigned int)mbstat.m_mtypes[mp->mt_type]; 155 printf("%lu mbuf%s in use:\n", totmbufs, plural(totmbufs)); 156 for (mp = mbtypes; mp->mt_name; mp++) 157 if (mbstat.m_mtypes[mp->mt_type]) { 158 seen[mp->mt_type] = YES; 159 printf("\t%u mbuf%s allocated to %s\n", 160 mbstat.m_mtypes[mp->mt_type], 161 plural(mbstat.m_mtypes[mp->mt_type]), 162 mp->mt_name); 163 } 164 seen[MT_FREE] = YES; 165 for (i = 0; i < nmbtypes; i++) 166 if (!seen[i] && mbstat.m_mtypes[i]) { 167 printf("\t%u mbuf%s allocated to <mbuf type %d>\n", 168 mbstat.m_mtypes[i], 169 plural(mbstat.m_mtypes[i]), i); 170 } 171 totmem = (mbpool.pr_npages * (unsigned long)page_size); 172 totused = mbpool.pr_nout * mbpool.pr_size; 173 for (i = 0; i < mclp; i++) { 174 printf("%u/%lu/%lu mbuf %d byte clusters in use (current/peak/max)\n", 175 mclpools[i].pr_nout, 176 (u_long)mclpools[i].pr_hiwat * mclpools[i].pr_itemsperpage, 177 (u_long)mclpools[i].pr_maxpages * mclpools[i].pr_itemsperpage, 178 mclpools[i].pr_size); 179 totmem += (mclpools[i].pr_npages * (unsigned long)page_size); 180 totused += mclpools[i].pr_nout * mclpools[i].pr_size; 181 } 182 183 totpct = (totmem == 0)? 0 : (totused/(totmem / 100)); 184 printf("%lu Kbytes allocated to network (%d%% in use)\n", 185 totmem / 1024, totpct); 186 printf("%lu requests for memory denied\n", mbstat.m_drops); 187 printf("%lu requests for memory delayed\n", mbstat.m_wait); 188 printf("%lu calls to protocol drain routines\n", mbstat.m_drain); 189 } 190