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. All advertising materials mentioning features or use of this software
  14  *    must display the following acknowledgement:
  15  *      This product includes software developed by the University of
  16  *      California, Berkeley and its contributors.
  17  * 4. Neither the name of the University nor the names of its contributors
  18  *    may be used to endorse or promote products derived from this software
  19  *    without specific prior written permission.
  20  *
  21  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  22  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  23  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  24  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  25  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  26  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  27  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  28  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  29  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  30  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  31  * SUCH DAMAGE.
  32  */
  33
  34 #include <sys/cdefs.h>
  35
  36 __FBSDID("$FreeBSD$");
  37
  38 #ifdef lint
  39 static const char sccsid[] = "@(#)mbufs.c       8.1 (Berkeley) 6/6/93";
  40 #endif
  41
  42 #include <sys/param.h>
  43 #include <sys/types.h>
  44 #include <sys/mbuf.h>
  45 #include <sys/sysctl.h>
  46
  47 #include <errno.h>
  48 #include <stdlib.h>
  49 #include <string.h>
  50 #include <paths.h>
  51
  52 #include "systat.h"
  53 #include "extern.h"
  54
  55 static struct mbstat *mbstat;
  56 static long *m_mbtypes;
  57 static short nmbtypes;
  58
  59 static struct mtnames {
  60         short mt_type;
  61         const char *mt_name;
  62 } mtnames[] = {
  63         { MT_DATA,      "data"},
  64         { MT_HEADER,    "headers"},
  65         { MT_SONAME,    "socknames"},
  66         { MT_CONTROL,   "control"},
  67         { MT_OOBDATA,   "oobdata"}
  68 };
  69 #define NNAMES  (sizeof (mtnames) / sizeof (mtnames[0]))
  70
  71 WINDOW *
  72 openmbufs(void)
  73 {
  74         return (subwin(stdscr, LINES-3-1, 0, MAINWIN_ROW, 0));
  75 }
  76
  77 void
  78 closembufs(WINDOW *w)
  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         wmove(wnd, 0, 0); wclrtoeol(wnd);
  91         mvwaddstr(wnd, 0, 10,
  92             "/0   /5   /10  /15  /20  /25  /30  /35  /40  /45  /50  /55  /60");
  93 }
  94
  95 void
  96 showmbufs(void)
  97 {
  98         int i, j, max, idx;
  99         u_long totmbufs;
 100         char buf[10];
 101         const char *mtname;
 102
 103         totmbufs = mbstat->m_mbufs;
 104
 105         /*
 106          * Print totals for different mbuf types.
 107          */
 108         for (j = 0; j < wnd->_maxy; j++) {
 109                 max = 0, idx = -1;
 110                 for (i = 0; i < wnd->_maxy; i++) {
 111                         if (i == MT_NOTMBUF)
 112                                 continue;
 113                         if (i >= nmbtypes)
 114                                 break;
 115                         if (m_mbtypes[i] > max) {
 116                                 max = m_mbtypes[i];
 117                                 idx = i;
 118                         }
 119                 }
 120                 if (max == 0)
 121                         break;
 122
 123                 mtname = NULL;
 124                 for (i = 0; i < (int)NNAMES; i++)
 125                         if (mtnames[i].mt_type == idx)
 126                                 mtname = mtnames[i].mt_name;
 127                 if (mtname == NULL)
 128                         mvwprintw(wnd, 1+j, 0, "%10d", idx);
 129                 else
 130                         mvwprintw(wnd, 1+j, 0, "%-10.10s", mtname);
 131                 wmove(wnd, 1 + j, 10);
 132                 if (max > 60) {
 133                         snprintf(buf, sizeof(buf), " %d", max);
 134                         max = 60;
 135                         while (max--)
 136                                 waddch(wnd, 'X');
 137                         waddstr(wnd, buf);
 138                 } else
 139                         while (max--)
 140                                 waddch(wnd, 'X');
 141                 wclrtoeol(wnd);
 142                 m_mbtypes[idx] = 0;
 143         }
 144
 145         /*
 146          * Print total number of free mbufs.
 147          */
 148         if (totmbufs > 0) {
 149                 mvwprintw(wnd, 1+j, 0, "%-10.10s", "Mbufs");
 150                 if (totmbufs > 60) {
 151                         snprintf(buf, sizeof(buf), " %lu", totmbufs);
 152                         totmbufs = 60;
 153                         while(totmbufs--)
 154                                 waddch(wnd, 'X');
 155                         waddstr(wnd, buf);
 156                 } else {
 157                         while(totmbufs--)
 158                                 waddch(wnd, 'X');
 159                 }
 160                 wclrtoeol(wnd);
 161                 j++;
 162         }
 163         wmove(wnd, 1+j, 0); wclrtobot(wnd);
 164 }
 165
 166 int
 167 initmbufs(void)
 168 {
 169         size_t len;
 170
 171         len = sizeof *mbstat;
 172         if ((mbstat = malloc(len)) == NULL) {
 173                 error("malloc mbstat failed");
 174                 return 0;
 175         }
 176         if (sysctlbyname("kern.ipc.mbstat", mbstat, &len, NULL, 0) < 0) {
 177                 error("sysctl retrieving mbstat");
 178                 return 0;
 179         }
 180         nmbtypes = mbstat->m_numtypes;
 181         if ((m_mbtypes = calloc(nmbtypes, sizeof(long *))) == NULL) {
 182                 error("calloc m_mbtypes failed");
 183                 return 0;
 184         }
 185
 186         return 1;
 187 }
 188
 189 void
 190 fetchmbufs(void)
 191 {
 192         size_t len;
 193
 194         len = sizeof *mbstat;
 195         if (sysctlbyname("kern.ipc.mbstat", mbstat, &len, NULL, 0) < 0)
 196                 printw("sysctl: mbstat: %s", strerror(errno));
 197 }