1 /* $OpenBSD: mbuf.c,v 1.19 2003/06/03 02:56:13 millert 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 #ifndef lint 34 #if 0 35 static char sccsid[] = "from: @(#)mbuf.c 8.1 (Berkeley) 6/6/93"; 36 #else 37 static char *rcsid = "$OpenBSD: mbuf.c,v 1.19 2003/06/03 02:56:13 millert Exp $"; 38 #endif 39 #endif /* not lint */ 40 41 #include <sys/param.h> 42 #include <sys/protosw.h> 43 #include <sys/socket.h> 44 #include <sys/mbuf.h> 45 #include <sys/pool.h> 46 #include <sys/sysctl.h> 47 #include <sys/errno.h> 48 49 #include <kvm.h> 50 #include <limits.h> 51 #include <stdio.h> 52 #include <string.h> 53 #include <unistd.h> 54 #include "netstat.h" 55 56 #define YES 1 57 typedef int bool; 58 59 struct mbstat mbstat; 60 struct pool mbpool, mclpool; 61 62 extern kvm_t *kvmd; 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 85 mbpr(u_long mbaddr, u_long mbpooladdr, u_long mclpooladdr) 86 { 87 int totmem, totused, totmbufs, totpct; 88 int i, mib[4], npools, flag = 0; 89 struct pool pool; 90 struct mbtypes *mp; 91 size_t size; 92 int page_size = getpagesize(); 93 94 if (nmbtypes != 256) { 95 fprintf(stderr, 96 "%s: unexpected change to mbstat; check source\n", 97 __progname); 98 return; 99 } 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 { 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 } 125 126 mib[0] = CTL_KERN; 127 mib[1] = KERN_POOL; 128 mib[2] = KERN_POOL_NPOOLS; 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 } 175 } 176 177 totmbufs = 0; 178 for (mp = mbtypes; mp->mt_name; mp++) 179 totmbufs += mbstat.m_mtypes[mp->mt_type]; 180 printf("%u mbuf%s in use:\n", totmbufs, plural(totmbufs)); 181 for (mp = mbtypes; mp->mt_name; mp++) 182 if (mbstat.m_mtypes[mp->mt_type]) { 183 seen[mp->mt_type] = YES; 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); 188 } 189 seen[MT_FREE] = YES; 190 for (i = 0; i < nmbtypes; i++) 191 if (!seen[i] && mbstat.m_mtypes[i]) { 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); 195 } 196 printf("%lu/%lu/%lu mbuf cluster pages in use (current/peak/max)\n", 197 (u_long)(mclpool.pr_nget - mclpool.pr_nput), 198 (u_long)mclpool.pr_hiwat, (u_long)mclpool.pr_maxpages); 199 totmem = (mbpool.pr_npages * page_size) + 200 (mclpool.pr_npages * page_size); 201 totused = (mbpool.pr_nget - mbpool.pr_nput) * mbpool.pr_size + 202 (mclpool.pr_nget - mclpool.pr_nput) * mclpool.pr_size; 203 totpct = (totmem == 0)? 0 : ((totused * 100)/totmem); 204 printf("%u Kbytes allocated to network (%d%% in use)\n", 205 totmem / 1024, totpct); 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); 209 } 210