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 1.6 2006/05/21 03:43:47 dillon 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         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         register int i, j, max, index;
  96         char buf[10];
  97         char *mtname;
  98
  99         if (mb == 0)
 100                 return;
 101         for (j = 0; j < wnd->_maxy; j++) {
 102                 max = 0, index = -1;
 103                 for (i = 0; i < wnd->_maxy; i++) {
 104                         if (i == MT_FREE)
 105                                 continue;
 106                         if (i >= nmbtypes)
 107                                 break;
 108                         if (m_mbtypes[i] > max) {
 109                                 max = m_mbtypes[i];
 110                                 index = i;
 111                         }
 112                 }
 113                 if (max == 0)
 114                         break;
 115
 116                 mtname = NULL;
 117                 for (i = 0; i < NNAMES; i++)
 118                         if (mtnames[i].mt_type == index)
 119                                 mtname = mtnames[i].mt_name;
 120                 if (mtname == NULL)
 121                         mvwprintw(wnd, 1+j, 0, "%10d", index);
 122                 else
 123                         mvwprintw(wnd, 1+j, 0, "%-10.10s", mtname);
 124                 wmove(wnd, 1 + j, 10);
 125                 if (max > 60) {
 126                         snprintf(buf, sizeof(buf), " %d", max);
 127                         max = 60;
 128                         while (max--)
 129                                 waddch(wnd, 'X');
 130                         waddstr(wnd, buf);
 131                 } else
 132                         while (max--)
 133                                 waddch(wnd, 'X');
 134                 wclrtoeol(wnd);
 135                 mb->m_mbufs -= m_mbtypes[index];
 136                 m_mbtypes[index] = 0;
 137         }
 138         if (mb->m_mbufs) {
 139                 mvwprintw(wnd, 1+j, 0, "%-10.10s", "free");
 140                 if (mb->m_mbufs > 60) {
 141                         snprintf(buf, sizeof(buf), " %ld", mb->m_mbufs);
 142                         mb->m_mbufs = 60;
 143                         while (mb->m_mbufs--)
 144                                 waddch(wnd, 'X');
 145                         waddstr(wnd, buf);
 146                 } else {
 147                         while(mb->m_mbufs--)
 148                                 waddch(wnd, 'X');
 149                 }
 150                 wclrtoeol(wnd);
 151                 j++;
 152         }
 153         wmove(wnd, 1+j, 0); wclrtobot(wnd);
 154 }
 155
 156 int
 157 initmbufs(void)
 158 {
 159         size_t len, mbtypeslen;
 160
 161         if (sysctlbyname("kern.ipc.mbtypes", NULL, &mbtypeslen, NULL, 0) < 0) {
 162                 error("sysctl getting mbtypes size failed");
 163                 return 0;
 164         }
 165         if ((m_mbtypes = calloc(1, mbtypeslen)) == NULL) {
 166                 error("calloc mbtypes failed");
 167                 return 0;
 168         }
 169         nmbtypes = mbtypeslen / sizeof(*m_mbtypes);
 170
 171         len = 0;
 172         if (sysctlbyname("kern.ipc.mbstat", 0, &len, 0, 0) < 0) {
 173                 error("sysctl getting mbstat size failed");
 174                 return 0;
 175         }
 176
 177         if (mb == 0)
 178                 mb = (struct mbstat *)calloc(1, sizeof *mb);
 179         return 1;
 180 }
 181
 182 void
 183 fetchmbufs(void)
 184 {
 185         size_t len;
 186
 187         len = sizeof *mb;
 188         if (sysctlbyname("kern.ipc.mbstat", mb, &len, 0, 0) < 0)
 189                 printw("sysctl: mbstat: %s", strerror(errno));
 190
 191         len = nmbtypes * sizeof *m_mbtypes;
 192         if (sysctlbyname("kern.ipc.mbtypes", m_mbtypes, &len, 0, 0) < 0)
 193                 printw("sysctl: mbtypes: %s", strerror(errno));
 194 }