usr.bin/systat/mbufs.c

   1 /*-
   2  * Copyright (c) 1980, 1992, 1993
   3  *      The Regents of the University of California.  All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions
   7  * are met:
   8  * 1. Redistributions of source code must retain the above copyright
   9  *    notice, this list of conditions and the following disclaimer.
  10  * 2. Redistributions in binary form must reproduce the above copyright
  11  *    notice, this list of conditions and the following disclaimer in the
  12  *    documentation and/or other materials provided with the distribution.
  13  * 3. Neither the name of the University nor the names of its contributors
  14  *    may be used to endorse or promote products derived from this software
  15  *    without specific prior written permission.
  16  *
  17  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  18  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  19  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  20  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  21  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  22  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  23  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  24  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  25  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  26  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  27  * SUCH DAMAGE.
  28  *
  29  * @(#)mbufs.c  8.1 (Berkeley) 6/6/93
  30  * $FreeBSD: src/usr.bin/systat/mbufs.c,v 1.10.2.1 2000/08/26 09:36:55 ps Exp $
  31  */
  32
  33 #define _KERNEL_STRUCTURES
  34 #include <sys/param.h>
  35 #include <sys/types.h>
  36 #include <sys/mbuf.h>
  37 #include <sys/sysctl.h>
  38
  39 #include <errno.h>
  40 #include <stdlib.h>
  41 #include <string.h>
  42 #include <paths.h>
  43 #include "systat.h"
  44 #include "extern.h"
  45
  46 static struct mbstat *mb;
  47 static u_long *m_mbtypes;
  48 static int nmbtypes;
  49
  50 static struct mtnames {
  51         int mt_type;
  52         const char *mt_name;
  53 } mtnames[] = {
  54         { MT_DATA,      "data"},
  55         { MT_HEADER,    "headers"},
  56         { MT_SONAME,    "socknames"},
  57         { MT_CONTROL,   "control"},
  58         { MT_OOBDATA,   "oobdata"}
  59 };
  60
  61 #define NNAMES  NELEM(mtnames)
  62
  63 WINDOW *
  64 openmbufs(void)
  65 {
  66         return (subwin(stdscr, LINES-5-1, 0, 5, 0));
  67 }
  68
  69 void
  70 closembufs(WINDOW *w)
  71 {
  72         if (w == NULL)
  73                 return;
  74         wclear(w);
  75         wrefresh(w);
  76         delwin(w);
  77 }
  78
  79 void
  80 labelmbufs(void)
  81 {
  82         wmove(wnd, 0, 0); wclrtoeol(wnd);
  83         mvwaddstr(wnd, 0, 10,
  84             "/0   /5   /10  /15  /20  /25  /30  /35  /40  /45  /50  /55  /60");
  85 }
  86
  87 void
  88 showmbufs(void)
  89 {
  90         int i, j, idx;
  91         u_long max;
  92         char buf[10];
  93         const char *mtname;
  94
  95         if (mb == NULL)
  96                 return;
  97         for (j = 0; j < wnd->_maxy; j++) {
  98                 max = 0, idx = -1;
  99                 for (i = 0; i < wnd->_maxy; i++) {
 100                         if (i == MT_FREE)
 101                                 continue;
 102                         if (i >= nmbtypes)
 103                                 break;
 104                         if (m_mbtypes[i] > max) {
 105                                 max = m_mbtypes[i];
 106                                 idx = i;
 107                         }
 108                 }
 109                 if (max == 0)
 110                         break;
 111
 112                 mtname = NULL;
 113                 for (i = 0; i < (int)NNAMES; i++)
 114                         if (mtnames[i].mt_type == idx)
 115                                 mtname = mtnames[i].mt_name;
 116                 if (mtname == NULL)
 117                         mvwprintw(wnd, 1+j, 0, "%10d", idx);
 118                 else
 119                         mvwprintw(wnd, 1+j, 0, "%-10.10s", mtname);
 120                 wmove(wnd, 1 + j, 10);
 121                 if (max > 60) {
 122                         snprintf(buf, sizeof(buf), " %lu", max);
 123                         max = 60;
 124                         while (max--)
 125                                 waddch(wnd, 'X');
 126                         waddstr(wnd, buf);
 127                 } else
 128                         while (max--)
 129                                 waddch(wnd, 'X');
 130                 wclrtoeol(wnd);
 131                 mb->m_mbufs -= m_mbtypes[idx];
 132                 m_mbtypes[idx] = 0;
 133         }
 134         if (mb->m_mbufs) {
 135                 mvwprintw(wnd, 1+j, 0, "%-10.10s", "free");
 136                 if (mb->m_mbufs > 60) {
 137                         snprintf(buf, sizeof(buf), " %ld", mb->m_mbufs);
 138                         mb->m_mbufs = 60;
 139                         while (mb->m_mbufs--)
 140                                 waddch(wnd, 'X');
 141                         waddstr(wnd, buf);
 142                 } else {
 143                         while(mb->m_mbufs--)
 144                                 waddch(wnd, 'X');
 145                 }
 146                 wclrtoeol(wnd);
 147                 j++;
 148         }
 149         wmove(wnd, 1+j, 0); wclrtobot(wnd);
 150 }
 151
 152 int
 153 initmbufs(void)
 154 {
 155         size_t len, mbtypeslen;
 156
 157         if (sysctlbyname("kern.ipc.mbtypes", NULL, &mbtypeslen, NULL, 0) < 0) {
 158                 error("sysctl getting mbtypes size failed");
 159                 return 0;
 160         }
 161         if ((m_mbtypes = calloc(1, mbtypeslen)) == NULL) {
 162                 error("calloc mbtypes failed");
 163                 return 0;
 164         }
 165         nmbtypes = mbtypeslen / sizeof(*m_mbtypes);
 166
 167         len = 0;
 168         if (sysctlbyname("kern.ipc.mbstat", 0, &len, 0, 0) < 0) {
 169                 error("sysctl getting mbstat size failed");
 170                 return 0;
 171         }
 172
 173         if (mb == NULL)
 174                 mb = (struct mbstat *)calloc(1, sizeof *mb);
 175         return 1;
 176 }
 177
 178 void
 179 fetchmbufs(void)
 180 {
 181         size_t len;
 182
 183         len = sizeof *mb;
 184         if (sysctlbyname("kern.ipc.mbstat", mb, &len, 0, 0) < 0)
 185                 printw("sysctl: mbstat: %s", strerror(errno));
 186
 187         len = nmbtypes * sizeof *m_mbtypes;
 188         if (sysctlbyname("kern.ipc.mbtypes", m_mbtypes, &len, 0, 0) < 0)
 189                 printw("sysctl: mbtypes: %s", strerror(errno));
 190 }