usr.bin/netstat/mbuf.c

   1 /*
   2  * Copyright (c) 1983, 1988, 1993
   3  *      The Regents of the University of California.  All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions
   7  * are met:
   8  * 1. Redistributions of source code must retain the above copyright
   9  *    notice, this list of conditions and the following disclaimer.
  10  * 2. Redistributions in binary form must reproduce the above copyright
  11  *    notice, this list of conditions and the following disclaimer in the
  12  *    documentation and/or other materials provided with the distribution.
  13  * 3. Neither the name of the University nor the names of its contributors
  14  *    may be used to endorse or promote products derived from this software
  15  *    without specific prior written permission.
  16  *
  17  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  18  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  19  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  20  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  21  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  22  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  23  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  24  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  25  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  26  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  27  * SUCH DAMAGE.
  28  *
  29  * @(#)mbuf.c   8.1 (Berkeley) 6/6/93
  30  * $FreeBSD: src/usr.bin/netstat/mbuf.c,v 1.17.2.3 2001/08/10 09:07:09 ru Exp $
  31  */
  32
  33 #define _KERNEL_STRUCTURES
  34 #include <sys/param.h>
  35 #include <sys/mbuf.h>
  36 #include <sys/protosw.h>
  37 #include <sys/socket.h>
  38 #include <sys/sysctl.h>
  39
  40 #include <err.h>
  41 #include <stdbool.h>
  42 #include <stdio.h>
  43 #include <stdlib.h>
  44 #include "netstat.h"
  45
  46 #define YES     true
  47
  48 static struct mbtypenames {
  49         int     mt_type;
  50         const char *mt_name;
  51 } mbtypenames[] = {
  52         { MT_DATA,      "data" },
  53         { MT_OOBDATA,   "oob data" },
  54         { MT_CONTROL,   "ancillary data" },
  55         { MT_HEADER,    "packet headers" },
  56         { MT_SONAME,    "socket names and addresses" },
  57         { 0, 0 }
  58 };
  59
  60 /*
  61  * Print mbuf statistics.
  62  */
  63 void
  64 mbpr(u_long mbaddr, u_long mbtaddr, u_long nmbcaddr, u_long nmbjcaddr,
  65     u_long nmbufaddr, u_long ncpusaddr)
  66 {
  67         u_long totmem, totpossible;
  68         struct mbstat *mbstat;
  69         struct mbtypenames *mp;
  70         int name[3], nmbclusters, nmbjclusters, nmbufs, nmbtypes;
  71         size_t nmbclen, nmbjclen, nmbuflen, mbstatlen, mbtypeslen;
  72         u_long *mbtypes;
  73         int ncpus;
  74         int n;
  75         int i;
  76         bool *seen;     /* "have we seen this type yet?" */
  77
  78         mbtypes = NULL;
  79         seen = NULL;
  80         mbstat = NULL;
  81
  82         /*
  83          * XXX
  84          * We can't kread() mbtypeslen from a core image so we'll
  85          * bogusly assume it's the same as in the running kernel.
  86          */
  87         if (sysctlbyname("kern.ipc.mbtypes", NULL, &mbtypeslen, NULL, 0) < 0) {
  88                 warn("sysctl: retrieving mbtypes length");
  89                 goto err;
  90         }
  91         nmbtypes = mbtypeslen / sizeof(*mbtypes);
  92         if ((seen = calloc(nmbtypes, sizeof(*seen))) == NULL) {
  93                 warn("calloc");
  94                 goto err;
  95         }
  96
  97         if (mbaddr) {
  98                 if (kread(ncpusaddr, (char *)&ncpus, sizeof ncpus))
  99                         goto err;
 100                 mbstat = calloc(ncpus, sizeof(*mbstat));
 101                 if (kread(mbaddr, (char *)mbstat, sizeof *mbstat * ncpus))
 102                         goto err;
 103                 mbtypes = calloc(ncpus, mbtypeslen);
 104                 if (kread(mbtaddr, (char *)mbtypes, mbtypeslen * ncpus))
 105                         goto err;
 106                 if (kread(nmbcaddr, (char *)&nmbclusters, sizeof(int)))
 107                         goto err;
 108                 if (kread(nmbjcaddr, (char *)&nmbjclusters, sizeof(int)))
 109                         goto err;
 110                 if (kread(nmbufaddr, (char *)&nmbufs, sizeof(int)))
 111                         goto err;
 112                 for (n = 1; n < ncpus; ++n) {
 113                         mbstat[0].m_mbufs += mbstat[n].m_mbufs;
 114                         mbstat[0].m_clusters += mbstat[n].m_clusters;
 115                         mbstat[0].m_drops += mbstat[n].m_drops;
 116                         mbstat[0].m_wait += mbstat[n].m_wait;
 117                         mbstat[0].m_drain += mbstat[n].m_drain;
 118
 119                         for (i = 0; i < nmbtypes; ++i) {
 120                                 mbtypes[i] += mbtypes[n * nmbtypes + i];
 121                         }
 122                 }
 123         } else {
 124                 name[0] = CTL_KERN;
 125                 name[1] = KERN_IPC;
 126                 name[2] = KIPC_MBSTAT;
 127                 mbstat = malloc(sizeof(*mbstat));
 128                 mbstatlen = sizeof *mbstat;
 129                 /* fake ncpus, kernel will aggregate mbstat array for us */
 130                 if (sysctl(name, 3, mbstat, &mbstatlen, 0, 0) < 0) {
 131                         warn("sysctl: retrieving mbstat");
 132                         goto err;
 133                 }
 134
 135                 mbtypes = malloc(mbtypeslen);
 136                 if (sysctlbyname("kern.ipc.mbtypes", mbtypes, &mbtypeslen, NULL,
 137                     0) < 0) {
 138                         warn("sysctl: retrieving mbtypes");
 139                         goto err;
 140                 }
 141
 142                 name[2] = KIPC_NMBCLUSTERS;
 143                 nmbclen = sizeof(int);
 144                 if (sysctl(name, 3, &nmbclusters, &nmbclen, 0, 0) < 0) {
 145                         warn("sysctl: retrieving nmbclusters");
 146                         goto err;
 147                 }
 148
 149                 nmbjclen = sizeof(int);
 150                 if (sysctlbyname("kern.ipc.nmbjclusters",
 151                     &nmbjclusters, &nmbjclen, 0, 0) < 0) {
 152                         warn("sysctl: retrieving nmbjclusters");
 153                         goto err;
 154                 }
 155
 156                 nmbuflen = sizeof(int);
 157                 if (sysctlbyname("kern.ipc.nmbufs", &nmbufs, &nmbuflen, 0, 0) < 0) {
 158                         warn("sysctl: retrieving nmbufs");
 159                         goto err;
 160                 }
 161         }
 162
 163 #undef MSIZE
 164 #define MSIZE           (mbstat->m_msize)
 165 #undef MCLBYTES
 166 #define MCLBYTES        (mbstat->m_mclbytes)
 167 #undef MJUMPAGESIZE
 168 #define MJUMPAGESIZE    (mbstat->m_mjumpagesize)
 169
 170         printf("%lu/%u mbufs in use (current/max):\n", mbstat->m_mbufs, nmbufs);
 171         printf("%lu/%u mbuf clusters in use (current/max)\n",
 172                 mbstat->m_clusters, nmbclusters);
 173         printf("%lu/%u mbuf jumbo clusters in use (current/max)\n",
 174                 mbstat->m_jclusters, nmbjclusters);
 175         for (mp = mbtypenames; mp->mt_name; mp++)
 176                 if (mbtypes[mp->mt_type]) {
 177                         seen[mp->mt_type] = YES;
 178                         printf("\t%lu mbufs and mbuf clusters "
 179                                "allocated to %s\n",
 180                                mbtypes[mp->mt_type], mp->mt_name);
 181                 }
 182         seen[MT_FREE] = YES;
 183         for (i = 0; i < nmbtypes; i++)
 184                 if (!seen[i] && mbtypes[i]) {
 185                         printf("\t%lu mbufs and mbuf clusters allocated to <mbuf type %d>\n",
 186                             mbtypes[i], i);
 187                 }
 188         totmem = mbstat->m_mbufs * MSIZE + mbstat->m_clusters * MCLBYTES +
 189             mbstat->m_jclusters * MJUMPAGESIZE;
 190         totpossible =  MSIZE * nmbufs + nmbclusters * MCLBYTES +
 191             nmbjclusters * MJUMPAGESIZE;
 192         printf("%lu Kbytes allocated to network (%lu%% of mb_map in use)\n",
 193                 totmem / 1024, (totmem * 100) / totpossible);
 194         printf("%lu requests for memory denied\n", mbstat->m_drops);
 195         printf("%lu requests for memory delayed\n", mbstat->m_wait);
 196         printf("%lu calls to protocol drain routines\n", mbstat->m_drain);
 197
 198 err:
 199         if (mbstat != NULL)
 200                 free(mbstat);
 201         if (mbtypes != NULL)
 202                 free(mbtypes);
 203         if (seen != NULL)
 204                 free(seen);
 205 }