4.3BSD - /usr/src/ucb/netstat/mbuf.c

   1: /*
   2:  * Copyright (c) 1983 Regents of the University of California.
   3:  * All rights reserved.  The Berkeley software License Agreement
   4:  * specifies the terms and conditions for redistribution.
   5:  */
   6: 
   7: #ifndef lint
   8: static char sccsid[] = "@(#)mbuf.c	5.1 (Berkeley) 6/4/85";
   9: #endif not lint
  10: 
  11: #include <stdio.h>
  12: #include <sys/param.h>
  13: #include <sys/mbuf.h>
  14: #define YES 1
  15: typedef int bool;
  16: 
  17: struct  mbstat mbstat;
  18: extern  int kmem;
  19: 
  20: static struct mbtypes {
  21:     int mt_type;
  22:     char    *mt_name;
  23: } mbtypes[] = {
  24:     { MT_DATA,  "data" },
  25:     { MT_HEADER,    "packet headers" },
  26:     { MT_SOCKET,    "socket structures" },
  27:     { MT_PCB,   "protocol control blocks" },
  28:     { MT_RTABLE,    "routing table entries" },
  29:     { MT_HTABLE,    "IMP host table entries" },
  30:     { MT_ATABLE,    "address resolution tables" },
  31:     { MT_FTABLE,    "fragment reassembly queue headers" },
  32:     { MT_SONAME,    "socket names and addresses" },
  33:     { MT_ZOMBIE,    "zombie process information" },
  34:     { MT_SOOPTS,    "socket options" },
  35:     { MT_RIGHTS,    "access rights" },
  36:     { MT_IFADDR,    "interface addresses" },
  37:     { 0, 0 }
  38: };
  39: 
  40: int nmbtypes = sizeof(mbstat.m_mtypes) / sizeof(short);
  41: bool seen[256];         /* "have we seen this type yet?" */
  42: 
  43: /*
  44:  * Print mbuf statistics.
  45:  */
  46: mbpr(mbaddr)
  47:     off_t mbaddr;
  48: {
  49:     register int totmem, totfree, totmbufs;
  50:     register int i;
  51:     register struct mbtypes *mp;
  52: 
  53:     if (nmbtypes != 256) {
  54:         fprintf(stderr, "unexpected change to mbstat; check source\n");
  55:         return;
  56:     }
  57:     if (mbaddr == 0) {
  58:         printf("mbstat: symbol not in namelist\n");
  59:         return;
  60:     }
  61:     klseek(kmem, mbaddr, 0);
  62:     if (read(kmem, &mbstat, sizeof (mbstat)) != sizeof (mbstat)) {
  63:         printf("mbstat: bad read\n");
  64:         return;
  65:     }
  66:     printf("%d/%d mbufs in use:\n",
  67:         mbstat.m_mbufs - mbstat.m_mtypes[MT_FREE], mbstat.m_mbufs);
  68:     totmbufs = 0;
  69:     for (mp = mbtypes; mp->mt_name; mp++)
  70:         if (mbstat.m_mtypes[mp->mt_type]) {
  71:             seen[mp->mt_type] = YES;
  72:             printf("\t%d mbufs allocated to %s\n",
  73:                 mbstat.m_mtypes[mp->mt_type], mp->mt_name);
  74:             totmbufs += mbstat.m_mtypes[mp->mt_type];
  75:         }
  76:     seen[MT_FREE] = YES;
  77:     for (i = 0; i < nmbtypes; i++)
  78:         if (!seen[i] && mbstat.m_mtypes[i]) {
  79:             printf("\t%d mbufs allocated to <mbuf type %d>\n",
  80:                 mbstat.m_mtypes[i], i);
  81:             totmbufs += mbstat.m_mtypes[i];
  82:         }
  83:     if (totmbufs != mbstat.m_mbufs - mbstat.m_mtypes[MT_FREE])
  84:         printf("*** %d mbufs missing ***\n",
  85:             (mbstat.m_mbufs - mbstat.m_mtypes[MT_FREE]) - totmbufs);
  86:     printf("%d/%d mapped pages in use\n",
  87:         mbstat.m_clusters - mbstat.m_clfree, mbstat.m_clusters);
  88:     totmem = mbstat.m_mbufs * MSIZE + mbstat.m_clusters * CLBYTES;
  89:     totfree = mbstat.m_mtypes[MT_FREE]*MSIZE + mbstat.m_clfree * CLBYTES;
  90:     printf("%d Kbytes allocated to network (%d%% in use)\n",
  91:         totmem / 1024, (totmem - totfree) * 100 / totmem);
  92:     printf("%d requests for memory denied\n", mbstat.m_drops);
  93: }

Defined functions

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Defined typedef's

Defined macros