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  * $DragonFly: src/usr.bin/netstat/mbuf.c,v 1.7 2006/10/09 22:30:48 hsu Exp $
  32  */
  33
  34 #define _KERNEL_STRUCTURES
  35 #include <sys/param.h>
  36 #include <sys/mbuf.h>
  37 #include <sys/protosw.h>
  38 #include <sys/socket.h>
  39 #include <sys/sysctl.h>
  40
  41 #include <err.h>
  42 #include <stdio.h>
  43 #include <stdlib.h>
  44 #include "netstat.h"
  45
  46 #define YES     1
  47 typedef int bool;
  48
  49 static struct mbtypenames {
  50         int     mt_type;
  51         const char *mt_name;
  52 } mbtypenames[] = {
  53         { MT_DATA,      "data" },
  54         { MT_OOBDATA,   "oob data" },
  55         { MT_CONTROL,   "ancillary data" },
  56         { MT_HEADER,    "packet headers" },
  57         { MT_SONAME,    "socket names and addresses" },
  58         { 0, 0 }
  59 };
  60
  61 /*
  62  * Print mbuf statistics.
  63  */
  64 void
  65 mbpr(u_long mbaddr, u_long mbtaddr, u_long nmbcaddr, u_long nmbjcaddr,
  66     u_long nmbufaddr, u_long ncpusaddr)
  67 {
  68         u_long totmem, totpossible;
  69         struct mbstat *mbstat;
  70         struct mbtypenames *mp;
  71         int name[3], nmbclusters, nmbjclusters, nmbufs, nmbtypes;
  72         size_t nmbclen, nmbjclen, nmbuflen, mbstatlen, mbtypeslen;
  73         u_long *mbtypes;
  74         int ncpus;
  75         int n;
  76         int i;
  77         bool *seen;     /* "have we seen this type yet?" */
  78
  79         mbtypes = NULL;
  80         seen = NULL;
  81         mbstat = NULL;
  82
  83         /*
  84          * XXX
  85          * We can't kread() mbtypeslen from a core image so we'll
  86          * bogusly assume it's the same as in the running kernel.
  87          */
  88         if (sysctlbyname("kern.ipc.mbtypes", NULL, &mbtypeslen, NULL, 0) < 0) {
  89                 warn("sysctl: retrieving mbtypes length");
  90                 goto err;
  91         }
  92         nmbtypes = mbtypeslen / sizeof(*mbtypes);
  93         if ((seen = calloc(nmbtypes, sizeof(*seen))) == NULL) {
  94                 warn("calloc");
  95                 goto err;
  96         }
  97
  98         if (mbaddr) {
  99                 if (kread(ncpusaddr, (char *)&ncpus, sizeof ncpus))
 100                         goto err;
 101                 mbstat = calloc(ncpus, sizeof(*mbstat));
 102                 if (kread(mbaddr, (char *)mbstat, sizeof *mbstat * ncpus))
 103                         goto err;
 104                 mbtypes = calloc(ncpus, mbtypeslen);
 105                 if (kread(mbtaddr, (char *)mbtypes, mbtypeslen * ncpus))
 106                         goto err;
 107                 if (kread(nmbcaddr, (char *)&nmbclusters, sizeof(int)))
 108                         goto err;
 109                 if (kread(nmbjcaddr, (char *)&nmbjclusters, sizeof(int)))
 110                         goto err;
 111                 if (kread(nmbufaddr, (char *)&nmbufs, sizeof(int)))
 112                         goto err;
 113                 for (n = 1; n < ncpus; ++n) {
 114                         mbstat[0].m_mbufs += mbstat[n].m_mbufs;
 115                         mbstat[0].m_clusters += mbstat[n].m_clusters;
 116                         mbstat[0].m_drops += mbstat[n].m_drops;
 117                         mbstat[0].m_wait += mbstat[n].m_wait;
 118                         mbstat[0].m_drain += mbstat[n].m_drain;
 119
 120                         for (i = 0; i < nmbtypes; ++i) {
 121                                 mbtypes[i] += mbtypes[n * nmbtypes + i];
 122                         }
 123                 }
 124         } else {
 125                 name[0] = CTL_KERN;
 126                 name[1] = KERN_IPC;
 127                 name[2] = KIPC_MBSTAT;
 128                 mbstat = malloc(sizeof(*mbstat));
 129                 mbstatlen = sizeof *mbstat;
 130                 /* fake ncpus, kernel will aggregate mbstat array for us */
 131                 if (sysctl(name, 3, mbstat, &mbstatlen, 0, 0) < 0) {
 132                         warn("sysctl: retrieving mbstat");
 133                         goto err;
 134                 }
 135
 136                 mbtypes = malloc(mbtypeslen);
 137                 if (sysctlbyname("kern.ipc.mbtypes", mbtypes, &mbtypeslen, NULL,
 138                     0) < 0) {
 139                         warn("sysctl: retrieving mbtypes");
 140                         goto err;
 141                 }
 142
 143                 name[2] = KIPC_NMBCLUSTERS;
 144                 nmbclen = sizeof(int);
 145                 if (sysctl(name, 3, &nmbclusters, &nmbclen, 0, 0) < 0) {
 146                         warn("sysctl: retrieving nmbclusters");
 147                         goto err;
 148                 }
 149
 150                 nmbjclen = sizeof(int);
 151                 if (sysctlbyname("kern.ipc.nmbjclusters",
 152                     &nmbjclusters, &nmbjclen, 0, 0) < 0) {
 153                         warn("sysctl: retrieving nmbjclusters");
 154                         goto err;
 155                 }
 156
 157                 nmbuflen = sizeof(int);
 158                 if (sysctlbyname("kern.ipc.nmbufs", &nmbufs, &nmbuflen, 0, 0) < 0) {
 159                         warn("sysctl: retrieving nmbufs");
 160                         goto err;
 161                 }
 162         }
 163
 164 #undef MSIZE
 165 #define MSIZE           (mbstat->m_msize)
 166 #undef MCLBYTES
 167 #define MCLBYTES        (mbstat->m_mclbytes)
 168 #undef MJUMPAGESIZE
 169 #define MJUMPAGESIZE    (mbstat->m_mjumpagesize)
 170
 171         printf("%lu/%u mbufs in use (current/max):\n", mbstat->m_mbufs, nmbufs);
 172         printf("%lu/%u mbuf clusters in use (current/max)\n",
 173                 mbstat->m_clusters, nmbclusters);
 174         printf("%lu/%u mbuf jumbo clusters in use (current/max)\n",
 175                 mbstat->m_jclusters, nmbjclusters);
 176         for (mp = mbtypenames; mp->mt_name; mp++)
 177                 if (mbtypes[mp->mt_type]) {
 178                         seen[mp->mt_type] = YES;
 179                         printf("\t%lu mbufs and mbuf clusters "
 180                                "allocated to %s\n",
 181                                mbtypes[mp->mt_type], mp->mt_name);
 182                 }
 183         seen[MT_FREE] = YES;
 184         for (i = 0; i < nmbtypes; i++)
 185                 if (!seen[i] && mbtypes[i]) {
 186                         printf("\t%lu mbufs and mbuf clusters allocated to <mbuf type %d>\n",
 187                             mbtypes[i], i);
 188                 }
 189         totmem = mbstat->m_mbufs * MSIZE + mbstat->m_clusters * MCLBYTES +
 190             mbstat->m_jclusters * MJUMPAGESIZE;
 191         totpossible =  MSIZE * nmbufs + nmbclusters * MCLBYTES +
 192             nmbjclusters * MJUMPAGESIZE;
 193         printf("%lu Kbytes allocated to network (%lu%% of mb_map in use)\n",
 194                 totmem / 1024, (totmem * 100) / totpossible);
 195         printf("%lu requests for memory denied\n", mbstat->m_drops);
 196         printf("%lu requests for memory delayed\n", mbstat->m_wait);
 197         printf("%lu calls to protocol drain routines\n", mbstat->m_drain);
 198
 199 err:
 200         if (mbstat != NULL)
 201                 free(mbstat);
 202         if (mbtypes != NULL)
 203                 free(mbtypes);
 204         if (seen != NULL)
 205                 free(seen);
 206 }