/*      $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);
}

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