usr.bin/netstat/mbuf.c

   1 /*      $NetBSD: mbuf.c,v 1.28 2008/01/17 14:53:18 yamt Exp $   */
   2
   3 /*
   4  * Copyright (c) 1983, 1988, 1993
   5  *      The Regents of the University of California.  All rights reserved.
   6  *
   7  * Redistribution and use in source and binary forms, with or without
   8  * modification, are permitted provided that the following conditions
   9  * are met:
  10  * 1. Redistributions of source code must retain the above copyright
  11  *    notice, this list of conditions and the following disclaimer.
  12  * 2. Redistributions in binary form must reproduce the above copyright
  13  *    notice, this list of conditions and the following disclaimer in the
  14  *    documentation and/or other materials provided with the distribution.
  15  * 3. Neither the name of the University nor the names of its contributors
  16  *    may be used to endorse or promote products derived from this software
  17  *    without specific prior written permission.
  18  *
  19  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  20  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  21  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  22  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  23  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  24  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  25  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  26  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  27  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  28  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  29  * SUCH DAMAGE.
  30  */
  31
  32 #include <sys/cdefs.h>
  33 #ifndef lint
  34 #if 0
  35 static char sccsid[] = "from: @(#)mbuf.c        8.1 (Berkeley) 6/6/93";
  36 #else
  37 __RCSID("$NetBSD: mbuf.c,v 1.28 2008/01/17 14:53:18 yamt Exp $");
  38 #endif
  39 #endif /* not lint */
  40
  41 #define __POOL_EXPOSE
  42
  43 #include <sys/param.h>
  44 #include <sys/protosw.h>
  45 #include <sys/socket.h>
  46 #include <sys/mbuf.h>
  47 #include <sys/pool.h>
  48 #include <sys/sysctl.h>
  49
  50 #include <stdio.h>
  51 #include <kvm.h>
  52 #include <stdlib.h>
  53 #include <limits.h>
  54 #include <errno.h>
  55 #include <err.h>
  56 #include <stdbool.h>
  57 #include "netstat.h"
  58
  59 #define YES     1
  60
  61 struct  mbstat mbstat;
  62 struct pool mbpool, mclpool;
  63 struct pool_allocator mbpa, mclpa;
  64
  65 static struct mbtypes {
  66         int             mt_type;
  67         const char      *mt_name;
  68 } mbtypes[] = {
  69         { MT_DATA,      "data" },
  70         { MT_OOBDATA,   "oob data" },
  71         { MT_CONTROL,   "ancillary data" },
  72         { MT_HEADER,    "packet headers" },
  73         { MT_FTABLE,    "fragment reassembly queue headers" },  /* XXX */
  74         { MT_SONAME,    "socket names and addresses" },
  75         { MT_SOOPTS,    "socket options" },
  76         { 0, 0 }
  77 };
  78
  79 const int nmbtypes = sizeof(mbstat.m_mtypes) / sizeof(short);
  80 bool seen[256];                 /* "have we seen this type yet?" */
  81
  82 int mbstats_ctl[] = { CTL_KERN, KERN_MBUF, MBUF_STATS };
  83 int mowners_ctl[] = { CTL_KERN, KERN_MBUF, MBUF_MOWNERS };
  84
  85 /*
  86  * Print mbuf statistics.
  87  */
  88 void
  89 mbpr(mbaddr, msizeaddr, mclbaddr, mbpooladdr, mclpooladdr)
  90         u_long mbaddr;
  91         u_long msizeaddr, mclbaddr;
  92         u_long mbpooladdr, mclpooladdr;
  93 {
  94         u_long totmem, totused, totpct;
  95         u_int totmbufs;
  96         int i, lines;
  97         struct mbtypes *mp;
  98         size_t len;
  99         void *data;
 100         struct mowner_user *mo;
 101         int mclbytes, msize;
 102
 103         if (nmbtypes != 256) {
 104                 fprintf(stderr,
 105                     "%s: unexpected change to mbstat; check source\n",
 106                         getprogname());
 107                 return;
 108         }
 109
 110         if (use_sysctl) {
 111                 size_t mbstatlen = sizeof(mbstat);
 112                 if (sysctl(mbstats_ctl,
 113                             sizeof(mbstats_ctl) / sizeof(mbstats_ctl[0]),
 114                             &mbstat, &mbstatlen, NULL, 0) < 0) {
 115                         warn("mbstat: sysctl failed");
 116                         return;
 117                 }
 118                 goto printit;
 119         }
 120
 121         if (mbaddr == 0) {
 122                 fprintf(stderr, "%s: mbstat: symbol not in namelist\n",
 123                     getprogname());
 124                 return;
 125         }
 126 /*XXX*/
 127         if (msizeaddr != 0)
 128                 kread(msizeaddr, (char *)&msize, sizeof (msize));
 129         else
 130                 msize = MSIZE;
 131         if (mclbaddr != 0)
 132                 kread(mclbaddr, (char *)&mclbytes, sizeof (mclbytes));
 133         else
 134                 mclbytes = MCLBYTES;
 135 /*XXX*/
 136
 137         if (kread(mbaddr, (char *)&mbstat, sizeof (mbstat)))
 138                 return;
 139
 140         if (kread(mbpooladdr, (char *)&mbpool, sizeof (mbpool)))
 141                 return;
 142
 143         if (kread(mclpooladdr, (char *)&mclpool, sizeof (mclpool)))
 144                 return;
 145
 146         mbpooladdr = (u_long) mbpool.pr_alloc;
 147         mclpooladdr = (u_long) mclpool.pr_alloc;
 148
 149         if (kread(mbpooladdr, (char *)&mbpa, sizeof (mbpa)))
 150                 return;
 151
 152         if (kread(mclpooladdr, (char *)&mclpa, sizeof (mclpa)))
 153                 return;
 154
 155     printit:
 156         totmbufs = 0;
 157         for (mp = mbtypes; mp->mt_name; mp++)
 158                 totmbufs += mbstat.m_mtypes[mp->mt_type];
 159         printf("%u mbufs in use:\n", totmbufs);
 160         for (mp = mbtypes; mp->mt_name; mp++)
 161                 if (mbstat.m_mtypes[mp->mt_type]) {
 162                         seen[mp->mt_type] = YES;
 163                         printf("\t%u mbufs allocated to %s\n",
 164                             mbstat.m_mtypes[mp->mt_type], mp->mt_name);
 165                 }
 166         seen[MT_FREE] = YES;
 167         for (i = 0; i < nmbtypes; i++)
 168                 if (!seen[i] && mbstat.m_mtypes[i]) {
 169                         printf("\t%u mbufs allocated to <mbuf type %d>\n",
 170                             mbstat.m_mtypes[i], i);
 171                 }
 172
 173         if (use_sysctl)         /* XXX */
 174                 goto dump_drain;
 175
 176         printf("%lu/%lu mapped pages in use\n",
 177                (u_long)(mclpool.pr_nget - mclpool.pr_nput),
 178                ((u_long)mclpool.pr_npages * mclpool.pr_itemsperpage));
 179         totmem = (mbpool.pr_npages << mbpa.pa_pageshift) +
 180             (mclpool.pr_npages << mclpa.pa_pageshift);
 181         totused = (mbpool.pr_nget - mbpool.pr_nput) * mbpool.pr_size +
 182             (mclpool.pr_nget - mclpool.pr_nput) * mclpool.pr_size;
 183         if (totmem == 0)
 184                 totpct = 0;
 185         else if (totused < (ULONG_MAX/100))
 186                 totpct = (totused * 100)/totmem;
 187         else {
 188                 u_long totmem1 = totmem/100;
 189                 u_long totused1 = totused/100;
 190                 totpct = (totused1 * 100)/totmem1;
 191         }
 192
 193         printf("%lu Kbytes allocated to network (%lu%% in use)\n",
 194             totmem / 1024, totpct);
 195
 196 dump_drain:
 197         printf("%lu calls to protocol drain routines\n", mbstat.m_drain);
 198
 199         if (sflag < 2)
 200                 return;
 201
 202         if (!use_sysctl)
 203                 return;
 204
 205         if (sysctl(mowners_ctl, sizeof(mowners_ctl)/sizeof(mowners_ctl[0]),
 206                     NULL, &len, NULL, 0) < 0) {
 207                 if (errno == ENOENT)
 208                         return;
 209                 warn("mowners: sysctl test");
 210                 return;
 211         }
 212         len += 10 * sizeof(*mo);                /* add some slop */
 213         data = malloc(len);
 214         if (data == NULL) {
 215                 warn("malloc(%lu)", (u_long)len);
 216                 return;
 217         }
 218
 219         if (sysctl(mowners_ctl, sizeof(mowners_ctl)/sizeof(mowners_ctl[0]),
 220                     data, &len, NULL, 0) < 0) {
 221                 warn("mowners: sysctl get");
 222                 free(data);
 223                 return;
 224         }
 225
 226         for (mo = (void *) data, lines = 0; len >= sizeof(*mo);
 227             len -= sizeof(*mo), mo++) {
 228                 char buf[32];
 229                 if (vflag == 1 &&
 230                     mo->mo_counter[MOWNER_COUNTER_CLAIMS] == 0 &&
 231                     mo->mo_counter[MOWNER_COUNTER_EXT_CLAIMS] == 0 &&
 232                     mo->mo_counter[MOWNER_COUNTER_CLUSTER_CLAIMS] == 0)
 233                         continue;
 234                 if (vflag == 0 &&
 235                     mo->mo_counter[MOWNER_COUNTER_CLAIMS] ==
 236                     mo->mo_counter[MOWNER_COUNTER_RELEASES] &&
 237                     mo->mo_counter[MOWNER_COUNTER_EXT_CLAIMS] ==
 238                     mo->mo_counter[MOWNER_COUNTER_EXT_RELEASES] &&
 239                     mo->mo_counter[MOWNER_COUNTER_CLUSTER_CLAIMS] ==
 240                     mo->mo_counter[MOWNER_COUNTER_CLUSTER_RELEASES])
 241                         continue;
 242                 snprintf(buf, sizeof(buf), "%16s %-13s",
 243                     mo->mo_name, mo->mo_descr);
 244                 if ((lines % 24) == 0 || lines > 24) {
 245                         printf("%30s %-8s %10s %10s %10s\n",
 246                             "", "", "small", "ext", "cluster");
 247                         lines = 1;
 248                 }
 249                 printf("%30s %-8s %10lu %10lu %10lu\n",
 250                     buf, "inuse",
 251                     mo->mo_counter[MOWNER_COUNTER_CLAIMS] -
 252                     mo->mo_counter[MOWNER_COUNTER_RELEASES],
 253                     mo->mo_counter[MOWNER_COUNTER_EXT_CLAIMS] -
 254                     mo->mo_counter[MOWNER_COUNTER_EXT_RELEASES],
 255                     mo->mo_counter[MOWNER_COUNTER_CLUSTER_CLAIMS] -
 256                     mo->mo_counter[MOWNER_COUNTER_CLUSTER_RELEASES]);
 257                 lines++;
 258                 if (vflag) {
 259                         printf("%30s %-8s %10lu %10lu %10lu\n",
 260                             "", "claims",
 261                             mo->mo_counter[MOWNER_COUNTER_CLAIMS],
 262                             mo->mo_counter[MOWNER_COUNTER_EXT_CLAIMS],
 263                             mo->mo_counter[MOWNER_COUNTER_CLUSTER_CLAIMS]);
 264                         printf("%30s %-8s %10lu %10lu %10lu\n",
 265                             "", "releases",
 266                             mo->mo_counter[MOWNER_COUNTER_RELEASES],
 267                             mo->mo_counter[MOWNER_COUNTER_EXT_RELEASES],
 268                             mo->mo_counter[MOWNER_COUNTER_CLUSTER_RELEASES]);
 269                         lines += 2;
 270                 }
 271         }
 272         free(data);
 273 }