usr.bin/systat/mbufs.c

   1 /*      $NetBSD: mbufs.c,v 1.14 2006/10/22 16:43:24 christos Exp $      */
   2
   3 /*-
   4  * Copyright (c) 1980, 1992, 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. Neither the name of the University nor the names of its contributors
  16  *    may be used to endorse or promote products derived from this software
  17  *    without specific prior written permission.
  18  *
  19  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  20  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  21  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  22  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  23  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  24  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  25  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  26  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  27  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  28  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  29  * SUCH DAMAGE.
  30  */
  31
  32 #include <sys/cdefs.h>
  33 #ifndef lint
  34 #if 0
  35 static char sccsid[] = "@(#)mbufs.c     8.1 (Berkeley) 6/6/93";
  36 #endif
  37 __RCSID("$NetBSD: mbufs.c,v 1.14 2006/10/22 16:43:24 christos Exp $");
  38 #endif /* not lint */
  39
  40 #include <sys/param.h>
  41 #include <sys/mbuf.h>
  42
  43 #include <stdlib.h>
  44
  45 #include "systat.h"
  46 #include "extern.h"
  47
  48 static struct mbstat *mb;
  49
  50 const char *mtnames[] = {
  51         "free",
  52         "data",
  53         "headers",
  54         "sockets",
  55         "pcbs",
  56         "routes",
  57         "hosts",
  58         "arps",
  59         "socknames",
  60         "zombies",
  61         "sockopts",
  62         "frags",
  63         "rights",
  64         "ifaddrs",
  65 };
  66
  67 #define NNAMES  (sizeof (mtnames) / sizeof (mtnames[0]))
  68
  69 WINDOW *
  70 openmbufs(void)
  71 {
  72
  73         return (subwin(stdscr, -1, 0, 5, 0));
  74 }
  75
  76 void
  77 closembufs(WINDOW *w)
  78 {
  79
  80         if (w == NULL)
  81                 return;
  82         wclear(w);
  83         wrefresh(w);
  84         delwin(w);
  85 }
  86
  87 void
  88 labelmbufs(void)
  89 {
  90
  91         wmove(wnd, 0, 0); wclrtoeol(wnd);
  92         mvwaddstr(wnd, 0, 10,
  93             "/0   /5   /10  /15  /20  /25  /30  /35  /40  /45  /50  /55  /60");
  94 }
  95
  96 void
  97 showmbufs(void)
  98 {
  99         int i, j, max, idx;
 100         char buf[10];
 101
 102         if (mb == 0)
 103                 return;
 104         for (j = 0; j < getmaxy(wnd); j++) {
 105                 max = 0, idx = -1;
 106                 for (i = 0; i < getmaxy(wnd); i++)
 107                         if (mb->m_mtypes[i] > max) {
 108                                 max = mb->m_mtypes[i];
 109                                 idx = i;
 110                         }
 111                 if (max == 0)
 112                         break;
 113                 if (j > (int)NNAMES)
 114                         mvwprintw(wnd, 1+j, 0, "%10d", idx);
 115                 else
 116                         mvwprintw(wnd, 1+j, 0, "%-10.10s", mtnames[idx]);
 117                 wmove(wnd, 1 + j, 10);
 118                 if (max > 60) {
 119                         snprintf(buf, sizeof buf, " %5d", max);
 120                         max = 60;
 121                         while (max--)
 122                                 waddch(wnd, 'X');
 123                         waddstr(wnd, buf);
 124                 } else {
 125                         wclrtoeol(wnd);
 126                         whline(wnd, 'X', max);
 127                 }
 128                 mb->m_mtypes[idx] = 0;
 129         }
 130         wmove(wnd, 1+j, 0); wclrtobot(wnd);
 131 }
 132
 133 static struct nlist namelist[] = {
 134 #define X_MBSTAT        0
 135         { .n_name = "_mbstat" },
 136         { .n_name = NULL }
 137 };
 138
 139 int
 140 initmbufs(void)
 141 {
 142
 143         if (namelist[X_MBSTAT].n_type == 0) {
 144                 if (kvm_nlist(kd, namelist)) {
 145                         nlisterr(namelist);
 146                         return(0);
 147                 }
 148                 if (namelist[X_MBSTAT].n_type == 0) {
 149                         error("No namelist");
 150                         return(0);
 151                 }
 152         }
 153         if (mb == 0)
 154                 mb = (struct mbstat *)calloc(1, sizeof (*mb));
 155         return(1);
 156 }
 157
 158 void
 159 fetchmbufs(void)
 160 {
 161
 162         if (namelist[X_MBSTAT].n_type == 0)
 163                 return;
 164         NREAD(X_MBSTAT, mb, sizeof (*mb));
 165 }