purge pending output when fielding SIGINT (signal handling still
[unix-history] / usr / src / usr.bin / netstat / mbuf.c
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5ff67f98 1/*
b36fc510 2 * Copyright (c) 1983, 1988 Regents of the University of California.
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3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms are permitted
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6 * provided that the above copyright notice and this paragraph are
7 * duplicated in all such forms and that any documentation,
8 * advertising materials, and other materials related to such
9 * distribution and use acknowledge that the software was developed
10 * by the University of California, Berkeley. The name of the
11 * University may not be used to endorse or promote products derived
12 * from this software without specific prior written permission.
13 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
14 * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
15 * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
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16 */
17
bad4305f 18#ifndef lint
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19static char sccsid[] = "@(#)mbuf.c 5.6 (Berkeley) %G%";
20#endif /* not lint */
bad4305f 21
7c69b0a9 22#include <stdio.h>
24bf5f10 23#include <sys/param.h>
bad4305f 24#include <sys/mbuf.h>
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25#define YES 1
26typedef int bool;
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27
28struct mbstat mbstat;
29extern int kmem;
30
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31static struct mbtypes {
32 int mt_type;
33 char *mt_name;
34} mbtypes[] = {
35 { MT_DATA, "data" },
36 { MT_HEADER, "packet headers" },
37 { MT_SOCKET, "socket structures" },
38 { MT_PCB, "protocol control blocks" },
39 { MT_RTABLE, "routing table entries" },
40 { MT_HTABLE, "IMP host table entries" },
02c6746b 41 { MT_ATABLE, "address resolution tables" },
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42 { MT_FTABLE, "fragment reassembly queue headers" },
43 { MT_SONAME, "socket names and addresses" },
02c6746b 44 { MT_SOOPTS, "socket options" },
1ab9ab56 45 { MT_RIGHTS, "access rights" },
7c69b0a9 46 { MT_IFADDR, "interface addresses" },
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47 { 0, 0 }
48};
49
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50int nmbtypes = sizeof(mbstat.m_mtypes) / sizeof(short);
51bool seen[256]; /* "have we seen this type yet?" */
52
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53/*
54 * Print mbuf statistics.
55 */
56mbpr(mbaddr)
57 off_t mbaddr;
58{
02c6746b 59 register int totmem, totfree, totmbufs;
7c69b0a9 60 register int i;
02c6746b 61 register struct mbtypes *mp;
24bf5f10 62
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63 if (nmbtypes != 256) {
64 fprintf(stderr, "unexpected change to mbstat; check source\n");
65 return;
66 }
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67 if (mbaddr == 0) {
68 printf("mbstat: symbol not in namelist\n");
69 return;
70 }
bad4305f 71 klseek(kmem, mbaddr, 0);
f7c99b06 72 if (read(kmem, (char *)&mbstat, sizeof (mbstat)) != sizeof (mbstat)) {
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73 printf("mbstat: bad read\n");
74 return;
75 }
f9ae784a 76 printf("%u/%u mbufs in use:\n",
1ab9ab56 77 mbstat.m_mbufs - mbstat.m_mtypes[MT_FREE], mbstat.m_mbufs);
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78 totmbufs = 0;
79 for (mp = mbtypes; mp->mt_name; mp++)
80 if (mbstat.m_mtypes[mp->mt_type]) {
7c69b0a9 81 seen[mp->mt_type] = YES;
f9ae784a 82 printf("\t%u mbufs allocated to %s\n",
7c69b0a9 83 mbstat.m_mtypes[mp->mt_type], mp->mt_name);
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84 totmbufs += mbstat.m_mtypes[mp->mt_type];
85 }
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86 seen[MT_FREE] = YES;
87 for (i = 0; i < nmbtypes; i++)
88 if (!seen[i] && mbstat.m_mtypes[i]) {
f9ae784a 89 printf("\t%u mbufs allocated to <mbuf type %d>\n",
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90 mbstat.m_mtypes[i], i);
91 totmbufs += mbstat.m_mtypes[i];
92 }
1ab9ab56 93 if (totmbufs != mbstat.m_mbufs - mbstat.m_mtypes[MT_FREE])
f9ae784a 94 printf("*** %u mbufs missing ***\n",
1ab9ab56 95 (mbstat.m_mbufs - mbstat.m_mtypes[MT_FREE]) - totmbufs);
f9ae784a 96 printf("%u/%u mapped pages in use\n",
24bf5f10 97 mbstat.m_clusters - mbstat.m_clfree, mbstat.m_clusters);
3a23a111 98 totmem = mbstat.m_mbufs * MSIZE + mbstat.m_clusters * CLBYTES;
c7d38858 99 totfree = mbstat.m_mtypes[MT_FREE]*MSIZE + mbstat.m_clfree * CLBYTES;
f9ae784a 100 printf("%u Kbytes allocated to network (%d%% in use)\n",
c1567c4d 101 totmem / 1024, (totmem - totfree) * 100 / totmem);
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102 printf("%u requests for memory denied\n", mbstat.m_drops);
103 printf("%u requests for memory delayed\n", mbstat.m_wait);
104 printf("%u calls to protocol drain routines\n", mbstat.m_drain);
bad4305f 105}