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Annotation of 43BSD/ucb/netstat/mbuf.c, revision 1.1

1.1     ! root        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: }

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