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  * @(#)mbufs.c  8.1 (Berkeley) 6/6/93
  34  * $FreeBSD: src/usr.bin/systat/mbufs.c,v 1.10.2.1 2000/08/26 09:36:55 ps Exp $
  35  * $DragonFly: src/usr.bin/systat/mbufs.c,v 1.8 2008/11/10 04:59:45 swildner Exp $
  36  */
  37
  38 #define _KERNEL_STRUCTURES
  39 #include <sys/param.h>
  40 #include <sys/types.h>
  41 #include <sys/mbuf.h>
  42 #include <sys/sysctl.h>
  43
  44 #include <errno.h>
  45 #include <stdlib.h>
  46 #include <string.h>
  47 #include <paths.h>
  48 #include "systat.h"
  49 #include "extern.h"
  50
  51 static struct mbstat *mb;
  52 static u_long *m_mbtypes;
  53 static int nmbtypes;
  54
  55 static struct mtnames {
  56         int mt_type;
  57         const char *mt_name;
  58 } mtnames[] = {
  59         { MT_DATA,      "data"},
  60         { MT_HEADER,    "headers"},
  61         { MT_SONAME,    "socknames"},
  62         { MT_CONTROL,   "control"},
  63         { MT_OOBDATA,   "oobdata"}
  64 };
  65
  66 #define NNAMES  (sizeof (mtnames) / sizeof (mtnames[0]))
  67
  68 WINDOW *
  69 openmbufs(void)
  70 {
  71         return (subwin(stdscr, LINES-5-1, 0, 5, 0));
  72 }
  73
  74 void
  75 closembufs(WINDOW *w)
  76 {
  77         if (w == NULL)
  78                 return;
  79         wclear(w);
  80         wrefresh(w);
  81         delwin(w);
  82 }
  83
  84 void
  85 labelmbufs(void)
  86 {
  87         wmove(wnd, 0, 0); wclrtoeol(wnd);
  88         mvwaddstr(wnd, 0, 10,
  89             "/0   /5   /10  /15  /20  /25  /30  /35  /40  /45  /50  /55  /60");
  90 }
  91
  92 void
  93 showmbufs(void)
  94 {
  95         int i, j, idx;
  96         u_long max;
  97         char buf[10];
  98         const char *mtname;
  99
 100         if (mb == 0)
 101                 return;
 102         for (j = 0; j < wnd->_maxy; j++) {
 103                 max = 0, idx = -1;
 104                 for (i = 0; i < wnd->_maxy; i++) {
 105                         if (i == MT_FREE)
 106                                 continue;
 107                         if (i >= nmbtypes)
 108                                 break;
 109                         if (m_mbtypes[i] > max) {
 110                                 max = m_mbtypes[i];
 111                                 idx = i;
 112                         }
 113                 }
 114                 if (max == 0)
 115                         break;
 116
 117                 mtname = NULL;
 118                 for (i = 0; i < (int)NNAMES; i++)
 119                         if (mtnames[i].mt_type == idx)
 120                                 mtname = mtnames[i].mt_name;
 121                 if (mtname == NULL)
 122                         mvwprintw(wnd, 1+j, 0, "%10d", idx);
 123                 else
 124                         mvwprintw(wnd, 1+j, 0, "%-10.10s", mtname);
 125                 wmove(wnd, 1 + j, 10);
 126                 if (max > 60) {
 127                         snprintf(buf, sizeof(buf), " %lu", max);
 128                         max = 60;
 129                         while (max--)
 130                                 waddch(wnd, 'X');
 131                         waddstr(wnd, buf);
 132                 } else
 133                         while (max--)
 134                                 waddch(wnd, 'X');
 135                 wclrtoeol(wnd);
 136                 mb->m_mbufs -= m_mbtypes[idx];
 137                 m_mbtypes[idx] = 0;
 138         }
 139         if (mb->m_mbufs) {
 140                 mvwprintw(wnd, 1+j, 0, "%-10.10s", "free");
 141                 if (mb->m_mbufs > 60) {
 142                         snprintf(buf, sizeof(buf), " %ld", mb->m_mbufs);
 143                         mb->m_mbufs = 60;
 144                         while (mb->m_mbufs--)
 145                                 waddch(wnd, 'X');
 146                         waddstr(wnd, buf);
 147                 } else {
 148                         while(mb->m_mbufs--)
 149                                 waddch(wnd, 'X');
 150                 }
 151                 wclrtoeol(wnd);
 152                 j++;
 153         }
 154         wmove(wnd, 1+j, 0); wclrtobot(wnd);
 155 }
 156
 157 int
 158 initmbufs(void)
 159 {
 160         size_t len, mbtypeslen;
 161
 162         if (sysctlbyname("kern.ipc.mbtypes", NULL, &mbtypeslen, NULL, 0) < 0) {
 163                 error("sysctl getting mbtypes size failed");
 164                 return 0;
 165         }
 166         if ((m_mbtypes = calloc(1, mbtypeslen)) == NULL) {
 167                 error("calloc mbtypes failed");
 168                 return 0;
 169         }
 170         nmbtypes = mbtypeslen / sizeof(*m_mbtypes);
 171
 172         len = 0;
 173         if (sysctlbyname("kern.ipc.mbstat", 0, &len, 0, 0) < 0) {
 174                 error("sysctl getting mbstat size failed");
 175                 return 0;
 176         }
 177
 178         if (mb == 0)
 179                 mb = (struct mbstat *)calloc(1, sizeof *mb);
 180         return 1;
 181 }
 182
 183 void
 184 fetchmbufs(void)
 185 {
 186         size_t len;
 187
 188         len = sizeof *mb;
 189         if (sysctlbyname("kern.ipc.mbstat", mb, &len, 0, 0) < 0)
 190                 printw("sysctl: mbstat: %s", strerror(errno));
 191
 192         len = nmbtypes * sizeof *m_mbtypes;
 193         if (sysctlbyname("kern.ipc.mbtypes", m_mbtypes, &len, 0, 0) < 0)
 194                 printw("sysctl: mbtypes: %s", strerror(errno));
 195 }