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. All advertising materials mentioning features or use of this software
  14  *    must display the following acknowledgement:
  15  *      This product includes software developed by the University of
  16  *      California, Berkeley and its contributors.
  17  * 4. Neither the name of the University nor the names of its contributors
  18  *    may be used to endorse or promote products derived from this software
  19  *    without specific prior written permission.
  20  *
  21  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  22  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  23  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  24  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  25  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  26  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  27  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  28  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  29  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  30  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  31  * SUCH DAMAGE.
  32  *
  33  * @(#)mbuf.c   8.1 (Berkeley) 6/6/93
  34  * $FreeBSD: src/usr.bin/netstat/mbuf.c,v 1.17.2.3 2001/08/10 09:07:09 ru Exp $
  35  * $DragonFly: src/usr.bin/netstat/mbuf.c,v 1.7 2006/10/09 22:30:48 hsu Exp $
  36  */
  37
  38 #define _KERNEL_STRUCTURES
  39 #include <sys/param.h>
  40 #include <sys/mbuf.h>
  41 #include <sys/protosw.h>
  42 #include <sys/socket.h>
  43 #include <sys/sysctl.h>
  44
  45 #include <err.h>
  46 #include <stdio.h>
  47 #include <stdlib.h>
  48 #include "netstat.h"
  49
  50 #define YES     1
  51 typedef int bool;
  52
  53 static struct mbtypenames {
  54         int     mt_type;
  55         const char *mt_name;
  56 } mbtypenames[] = {
  57         { MT_DATA,      "data" },
  58         { MT_OOBDATA,   "oob data" },
  59         { MT_CONTROL,   "ancillary data" },
  60         { MT_HEADER,    "packet headers" },
  61         { MT_SONAME,    "socket names and addresses" },
  62         { 0, 0 }
  63 };
  64
  65 /*
  66  * Print mbuf statistics.
  67  */
  68 void
  69 mbpr(u_long mbaddr, u_long mbtaddr, u_long nmbcaddr, u_long nmbufaddr)
  70 {
  71         u_long totmem, totpossible;
  72         int i;
  73         struct mbstat mbstat;
  74         struct mbtypenames *mp;
  75         int name[3], nmbclusters, nmbufs, nmbtypes;
  76         size_t nmbclen, nmbuflen, mbstatlen, mbtypeslen;
  77         u_long *mbtypes;
  78         bool *seen;     /* "have we seen this type yet?" */
  79
  80         mbtypes = NULL;
  81         seen = 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         if ((mbtypes = malloc(mbtypeslen)) == NULL) {
  93                 warn("malloc: %lu bytes for mbtypes", (u_long)mbtypeslen);
  94                 goto err;
  95         }
  96
  97         nmbtypes = mbtypeslen / sizeof(*mbtypes);
  98         if ((seen = calloc(nmbtypes, sizeof(*seen))) == NULL) {
  99                 warn("calloc");
 100                 goto err;
 101         }
 102
 103         if (mbaddr) {
 104                 if (kread(mbaddr, (char *)&mbstat, sizeof mbstat))
 105                         goto err;
 106                 if (kread(mbtaddr, (char *)mbtypes, mbtypeslen))
 107                         goto err;
 108                 if (kread(nmbcaddr, (char *)&nmbclusters, sizeof(int)))
 109                         goto err;
 110                 if (kread(nmbufaddr, (char *)&nmbufs, sizeof(int)))
 111                         goto err;
 112         } else {
 113                 name[0] = CTL_KERN;
 114                 name[1] = KERN_IPC;
 115                 name[2] = KIPC_MBSTAT;
 116                 mbstatlen = sizeof mbstat;
 117                 if (sysctl(name, 3, &mbstat, &mbstatlen, 0, 0) < 0) {
 118                         warn("sysctl: retrieving mbstat");
 119                         goto err;
 120                 }
 121
 122                 if (sysctlbyname("kern.ipc.mbtypes", mbtypes, &mbtypeslen, NULL,
 123                     0) < 0) {
 124                         warn("sysctl: retrieving mbtypes");
 125                         goto err;
 126                 }
 127
 128                 name[2] = KIPC_NMBCLUSTERS;
 129                 nmbclen = sizeof(int);
 130                 if (sysctl(name, 3, &nmbclusters, &nmbclen, 0, 0) < 0) {
 131                         warn("sysctl: retrieving nmbclusters");
 132                         goto err;
 133                 }
 134
 135                 nmbuflen = sizeof(int);
 136                 if (sysctlbyname("kern.ipc.nmbufs", &nmbufs, &nmbuflen, 0, 0) < 0) {
 137                         warn("sysctl: retrieving nmbufs");
 138                         goto err;
 139                 }
 140         }
 141
 142 #undef MSIZE
 143 #define MSIZE           (mbstat.m_msize)
 144 #undef MCLBYTES
 145 #define MCLBYTES        (mbstat.m_mclbytes)
 146
 147         printf("%lu/%u mbufs in use (current/max):\n", mbstat.m_mbufs, nmbufs);
 148         printf("%lu/%u mbuf clusters in use (current/max)\n",
 149                 mbstat.m_clusters, nmbclusters);
 150         for (mp = mbtypenames; mp->mt_name; mp++)
 151                 if (mbtypes[mp->mt_type]) {
 152                         seen[mp->mt_type] = YES;
 153                         printf("\t%lu mbufs and mbuf clusters allocated to %s\n",
 154                             mbtypes[mp->mt_type], mp->mt_name);
 155                 }
 156         seen[MT_FREE] = YES;
 157         for (i = 0; i < nmbtypes; i++)
 158                 if (!seen[i] && mbtypes[i]) {
 159                         printf("\t%lu mbufs and mbuf clusters allocated to <mbuf type %d>\n",
 160                             mbtypes[i], i);
 161                 }
 162         totmem = mbstat.m_mbufs * MSIZE + mbstat.m_clusters * MCLBYTES;
 163         totpossible = nmbclusters * MCLBYTES + MSIZE * nmbufs;
 164         printf("%lu Kbytes allocated to network (%lu%% of mb_map in use)\n",
 165                 totmem / 1024, (totmem * 100) / totpossible);
 166         printf("%lu requests for memory denied\n", mbstat.m_drops);
 167         printf("%lu requests for memory delayed\n", mbstat.m_wait);
 168         printf("%lu calls to protocol drain routines\n", mbstat.m_drain);
 169
 170 err:
 171         if (mbtypes != NULL)
 172                 free(mbtypes);
 173         if (seen != NULL)
 174                 free(seen);
 175 }