/*      $NetBSD: mbuf.c,v 1.36 2024/02/24 09:53:26 mlelstv Exp $        */

/*
 * Copyright (c) 1983, 1988, 1993
 *      The Regents of the University of California.  All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. Neither the name of the University nor the names of its contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 */

#include <sys/cdefs.h>
#ifndef lint
#if 0
static char sccsid[] = "from: @(#)mbuf.c        8.1 (Berkeley) 6/6/93";
#else
__RCSID("$NetBSD: mbuf.c,v 1.36 2024/02/24 09:53:26 mlelstv Exp $");
#endif
#endif /* not lint */

#define __POOL_EXPOSE

#include <sys/param.h>
#include <sys/protosw.h>
#include <sys/socket.h>
#include <sys/mbuf.h>
#include <sys/pool.h>
#include <sys/sysctl.h>

#include <stdio.h>
#include <kvm.h>
#include <stdlib.h>
#include <limits.h>
#include <errno.h>
#include <err.h>
#include "netstat.h"
#include "prog_ops.h"

#define YES     1

struct  mbstat mbstat;
struct pool mbpool, mclpool;
struct pool_allocator mbpa, mclpa;

static struct mbtypes {
        int             mt_type;
        const char      *mt_name;
} mbtypes[] = {
        { MT_DATA,      "data" },
        { MT_OOBDATA,   "oob data" },
        { MT_CONTROL,   "ancillary data" },
        { MT_HEADER,    "packet headers" },
        { MT_FTABLE,    "fragment reassembly queue headers" },  /* XXX */
        { MT_SONAME,    "socket names and addresses" },
        { MT_SOOPTS,    "socket options" },
        { 0, 0 }
};

const int nmbtypes = sizeof(mbstat.m_mtypes) / sizeof(short);
bool seen[256];                 /* "have we seen this type yet?" */

int mbstats_ctl[] = { CTL_KERN, KERN_MBUF, MBUF_STATS };
int mowners_ctl[] = { CTL_KERN, KERN_MBUF, MBUF_MOWNERS };

/*
 * Print mbuf statistics.
 */
void
mbpr(u_long mbaddr, u_long msizeaddr, u_long mclbaddr, u_long mbpooladdr,
        u_long mclpooladdr)
{
        u_long totmem, totused, totpct;
        u_int totmbufs;
        int i, lines;
        struct mbtypes *mp;
        size_t len;
        void *data;
        struct mowner_user *mo;
        int mclbytes, msize;

        if (nmbtypes != 256) {
                fprintf(stderr,
                    "%s: unexpected change to mbstat; check source\n",
                    getprogname());
                return;
        }

        if (use_sysctl) {
                size_t mbstatlen = sizeof(mbstat);
                if (prog_sysctl(mbstats_ctl,
                            sizeof(mbstats_ctl) / sizeof(mbstats_ctl[0]),
                            &mbstat, &mbstatlen, NULL, 0) < 0) {
                        warn("mbstat: sysctl failed");
                        return;
                }
                goto printit;
        }

        if (mbaddr == 0) {
                fprintf(stderr, "%s: mbstat: symbol not in namelist\n",
                    getprogname());
                return;
        }
/*XXX*/
        if (msizeaddr != 0)
                kread(msizeaddr, (char *)&msize, sizeof (msize));
        else
                msize = MSIZE;
        if (mclbaddr != 0)
                kread(mclbaddr, (char *)&mclbytes, sizeof (mclbytes));
        else
                mclbytes = MCLBYTES;
/*XXX*/

        if (kread(mbaddr, (char *)&mbstat, sizeof (mbstat)))
                return;

        if (kread(mbpooladdr, (char *)&mbpool, sizeof (mbpool)))
                return;

        if (kread(mclpooladdr, (char *)&mclpool, sizeof (mclpool)))
                return;

        mbpooladdr = (u_long) mbpool.pr_alloc;
        mclpooladdr = (u_long) mclpool.pr_alloc;

        if (kread(mbpooladdr, (char *)&mbpa, sizeof (mbpa)))
                return;

        if (kread(mclpooladdr, (char *)&mclpa, sizeof (mclpa)))
                return;

    printit:
        totmbufs = 0;
        for (mp = mbtypes; mp->mt_name; mp++)
                totmbufs += mbstat.m_mtypes[mp->mt_type];
        printf("%u mbufs in use:\n", totmbufs);
        for (mp = mbtypes; mp->mt_name; mp++)
                if (mbstat.m_mtypes[mp->mt_type]) {
                        seen[mp->mt_type] = YES;
                        printf("\t%u mbufs allocated to %s\n",
                            mbstat.m_mtypes[mp->mt_type], mp->mt_name);
                }
        seen[MT_FREE] = YES;
        for (i = 0; i < nmbtypes; i++)
                if (!seen[i] && mbstat.m_mtypes[i]) {
                        printf("\t%u mbufs allocated to <mbuf type %d>\n",
                            mbstat.m_mtypes[i], i);
                }

        if (use_sysctl)         /* XXX */
                goto dump_drain;

        printf("%lu/%lu mapped pages in use\n",
            (u_long)(mclpool.pr_nget - mclpool.pr_nput),
            ((u_long)mclpool.pr_npages * mclpool.pr_itemsperpage));
        totmem = (mbpool.pr_npages << mbpa.pa_pageshift) +
            (mclpool.pr_npages << mclpa.pa_pageshift);
        totused = (mbpool.pr_nget - mbpool.pr_nput) * mbpool.pr_size +
            (mclpool.pr_nget - mclpool.pr_nput) * mclpool.pr_size;
        if (totmem == 0)
                totpct = 0;
        else if (totused < (ULONG_MAX / 100))
                totpct = (totused * 100)/totmem;
        else {
                u_long totmem1 = totmem / 100;
                u_long totused1 = totused / 100;
                totpct = (totused1 * 100) / totmem1;
        }

        printf("%lu Kbytes allocated to network (%lu%% in use)\n",
            totmem / 1024, totpct);

dump_drain:
        printf("%lu calls to protocol drain routines\n", mbstat.m_drain);

        if (sflag < 2)
                return;

        if (!use_sysctl)
                return;

        if (prog_sysctl(mowners_ctl,
            sizeof(mowners_ctl)/sizeof(mowners_ctl[0]),
            NULL, &len, NULL, 0) < 0) {
                if (errno == ENOENT)
                        return;
                warn("mowners: sysctl test");
                return;
        }
        len += 10 * sizeof(*mo);                /* add some slop */
        data = malloc(len);
        if (data == NULL) {
                warn("malloc(%lu)", (u_long)len);
                return;
        }

        if (prog_sysctl(mowners_ctl,
            sizeof(mowners_ctl)/sizeof(mowners_ctl[0]),
            data, &len, NULL, 0) < 0) {
                warn("mowners: sysctl get");
                free(data);
                return;
        }

        for (mo = (void *) data, lines = 0; len >= sizeof(*mo);
            len -= sizeof(*mo), mo++) {
                char buf[34];
                if (vflag == 1 &&
                    mo->mo_counter[MOWNER_COUNTER_CLAIMS] == 0 &&
                    mo->mo_counter[MOWNER_COUNTER_EXT_CLAIMS] == 0 &&
                    mo->mo_counter[MOWNER_COUNTER_CLUSTER_CLAIMS] == 0)
                        continue;
                if (vflag == 0 &&
                    mo->mo_counter[MOWNER_COUNTER_CLAIMS] ==
                    mo->mo_counter[MOWNER_COUNTER_RELEASES] &&
                    mo->mo_counter[MOWNER_COUNTER_EXT_CLAIMS] ==
                    mo->mo_counter[MOWNER_COUNTER_EXT_RELEASES] &&
                    mo->mo_counter[MOWNER_COUNTER_CLUSTER_CLAIMS] ==
                    mo->mo_counter[MOWNER_COUNTER_CLUSTER_RELEASES])
                        continue;
                snprintf(buf, sizeof(buf), "%16.16s %-13.16s",
                    mo->mo_name, mo->mo_descr);
                if ((lines % 24) == 0 || lines > 24) {
                        printf("%30s %-8s %10s %10s %10s\n",
                            "", "", "small", "ext", "cluster");
                        lines = 1;
                }
                printf("%30s %-8s %10lu %10lu %10lu\n",
                    buf, "inuse",
                    mo->mo_counter[MOWNER_COUNTER_CLAIMS] -
                    mo->mo_counter[MOWNER_COUNTER_RELEASES],
                    mo->mo_counter[MOWNER_COUNTER_EXT_CLAIMS] -
                    mo->mo_counter[MOWNER_COUNTER_EXT_RELEASES],
                    mo->mo_counter[MOWNER_COUNTER_CLUSTER_CLAIMS] -
                    mo->mo_counter[MOWNER_COUNTER_CLUSTER_RELEASES]);
                lines++;
                if (vflag) {
                        printf("%30s %-8s %10lu %10lu %10lu\n",
                            "", "claims",
                            mo->mo_counter[MOWNER_COUNTER_CLAIMS],
                            mo->mo_counter[MOWNER_COUNTER_EXT_CLAIMS],
                            mo->mo_counter[MOWNER_COUNTER_CLUSTER_CLAIMS]);
                        printf("%30s %-8s %10lu %10lu %10lu\n",
                            "", "releases",
                            mo->mo_counter[MOWNER_COUNTER_RELEASES],
                            mo->mo_counter[MOWNER_COUNTER_EXT_RELEASES],
                            mo->mo_counter[MOWNER_COUNTER_CLUSTER_RELEASES]);
                        lines += 2;
                }
        }
        free(data);
}