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Annotation of src/usr.bin/netstat/mbuf.c, Revision 1.1

1.1     ! deraadt     1: /*     $NetBSD: mbuf.c,v 1.8 1995/10/03 21:42:41 thorpej 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. All advertising materials mentioning features or use of this software
        !            16:  *    must display the following acknowledgement:
        !            17:  *     This product includes software developed by the University of
        !            18:  *     California, Berkeley and its contributors.
        !            19:  * 4. Neither the name of the University nor the names of its contributors
        !            20:  *    may be used to endorse or promote products derived from this software
        !            21:  *    without specific prior written permission.
        !            22:  *
        !            23:  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
        !            24:  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
        !            25:  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
        !            26:  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
        !            27:  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
        !            28:  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
        !            29:  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
        !            30:  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
        !            31:  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
        !            32:  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
        !            33:  * SUCH DAMAGE.
        !            34:  */
        !            35:
        !            36: #ifndef lint
        !            37: #if 0
        !            38: static char sccsid[] = "from: @(#)mbuf.c       8.1 (Berkeley) 6/6/93";
        !            39: #else
        !            40: static char *rcsid = "$NetBSD: mbuf.c,v 1.8 1995/10/03 21:42:41 thorpej Exp $";
        !            41: #endif
        !            42: #endif /* not lint */
        !            43:
        !            44: #include <sys/param.h>
        !            45: #include <sys/protosw.h>
        !            46: #include <sys/socket.h>
        !            47: #include <sys/mbuf.h>
        !            48:
        !            49: #include <stdio.h>
        !            50: #include "netstat.h"
        !            51:
        !            52: #define        YES     1
        !            53: typedef int bool;
        !            54:
        !            55: struct mbstat mbstat;
        !            56:
        !            57: static struct mbtypes {
        !            58:        int     mt_type;
        !            59:        char    *mt_name;
        !            60: } mbtypes[] = {
        !            61:        { MT_DATA,      "data" },
        !            62:        { MT_OOBDATA,   "oob data" },
        !            63:        { MT_CONTROL,   "ancillary data" },
        !            64:        { MT_HEADER,    "packet headers" },
        !            65:        { MT_FTABLE,    "fragment reassembly queue headers" },  /* XXX */
        !            66:        { MT_SONAME,    "socket names and addresses" },
        !            67:        { MT_SOOPTS,    "socket options" },
        !            68:        { 0, 0 }
        !            69: };
        !            70:
        !            71: int nmbtypes = sizeof(mbstat.m_mtypes) / sizeof(short);
        !            72: bool seen[256];                        /* "have we seen this type yet?" */
        !            73:
        !            74: /*
        !            75:  * Print mbuf statistics.
        !            76:  */
        !            77: void
        !            78: mbpr(mbaddr)
        !            79:        u_long mbaddr;
        !            80: {
        !            81:        register int totmem, totfree, totmbufs;
        !            82:        register int i;
        !            83:        register struct mbtypes *mp;
        !            84:
        !            85:        if (nmbtypes != 256) {
        !            86:                fprintf(stderr,
        !            87:                    "%s: unexpected change to mbstat; check source\n", prog);
        !            88:                return;
        !            89:        }
        !            90:        if (mbaddr == 0) {
        !            91:                fprintf(stderr, "%s: mbstat: symbol not in namelist\n", prog);
        !            92:                return;
        !            93:        }
        !            94:        if (kread(mbaddr, (char *)&mbstat, sizeof (mbstat)))
        !            95:                return;
        !            96:        totmbufs = 0;
        !            97:        for (mp = mbtypes; mp->mt_name; mp++)
        !            98:                totmbufs += mbstat.m_mtypes[mp->mt_type];
        !            99:        printf("%u mbufs in use:\n", totmbufs);
        !           100:        for (mp = mbtypes; mp->mt_name; mp++)
        !           101:                if (mbstat.m_mtypes[mp->mt_type]) {
        !           102:                        seen[mp->mt_type] = YES;
        !           103:                        printf("\t%u mbufs allocated to %s\n",
        !           104:                            mbstat.m_mtypes[mp->mt_type], mp->mt_name);
        !           105:                }
        !           106:        seen[MT_FREE] = YES;
        !           107:        for (i = 0; i < nmbtypes; i++)
        !           108:                if (!seen[i] && mbstat.m_mtypes[i]) {
        !           109:                        printf("\t%u mbufs allocated to <mbuf type %d>\n",
        !           110:                            mbstat.m_mtypes[i], i);
        !           111:                }
        !           112:        printf("%u/%u mapped pages in use\n",
        !           113:                mbstat.m_clusters - mbstat.m_clfree, mbstat.m_clusters);
        !           114:        totmem = totmbufs * MSIZE + mbstat.m_clusters * MCLBYTES;
        !           115:        totfree = mbstat.m_clfree * MCLBYTES;
        !           116:        printf("%u Kbytes allocated to network (%d%% in use)\n",
        !           117:                totmem / 1024, (totmem - totfree) * 100 / totmem);
        !           118:        printf("%u requests for memory denied\n", mbstat.m_drops);
        !           119:        printf("%u requests for memory delayed\n", mbstat.m_wait);
        !           120:        printf("%u calls to protocol drain routines\n", mbstat.m_drain);
        !           121: }