Home | History | Annotate | Line # | Download | only in systat 
      1 /*	$NetBSD: mbufs.c,v 1.16 2012/11/23 01:43:10 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 1.16 2012/11/23 01:43:10 christos Exp $");
     38 #endif /* not lint */
     39 
     40 #include <sys/param.h>
     41 #define MBUFTYPES
     42 #include <sys/mbuf.h>
     43 #include <sys/sysctl.h>
     44 
     45 #include <stdlib.h>
     46 #include <errno.h>
     47 #include <string.h>
     48 
     49 #include "systat.h"
     50 #include "extern.h"
     51 
     52 static struct mbstat *mb;
     53 
     54 #define	NNAMES	__arraycount(mbuftypes)
     55 
     56 WINDOW *
     57 openmbufs(void)
     58 {
     59 
     60 	return (subwin(stdscr, -1, 0, 5, 0));
     61 }
     62 
     63 void
     64 closembufs(WINDOW *w)
     65 {
     66 
     67 	if (w == NULL)
     68 		return;
     69 	wclear(w);
     70 	wrefresh(w);
     71 	delwin(w);
     72 }
     73 
     74 void
     75 labelmbufs(void)
     76 {
     77 
     78 	wmove(wnd, 0, 0); wclrtoeol(wnd);
     79 	mvwaddstr(wnd, 0, 10,
     80 	    "/0   /5   /10  /15  /20  /25  /30  /35  /40  /45  /50  /55  /60");
     81 }
     82 
     83 void
     84 showmbufs(void)
     85 {
     86 	int i, j, max, idx;
     87 	char buf[10];
     88 
     89 	if (mb == 0)
     90 		return;
     91 	for (j = 1; j <= getmaxy(wnd); j++) {
     92 		max = 0, idx = -1;
     93 		for (i = 0; i < getmaxy(wnd); i++)
     94 			if (mb->m_mtypes[i] > max) {
     95 				max = mb->m_mtypes[i];
     96 				idx = i;
     97 			}
     98 		if (max == 0)
     99 			break;
    100 		if (j >= (int)NNAMES)
    101 			mvwprintw(wnd, j, 0, "%10d", idx);
    102 		else
    103 			mvwprintw(wnd, j, 0, "%-10.10s", &mbuftypes[idx][2]);
    104 		wmove(wnd, j, 10);
    105 		if (max > 60) {
    106 			snprintf(buf, sizeof buf, " %5d", max);
    107 			max = 60;
    108 			while (max--)
    109 				waddch(wnd, 'X');
    110 			waddstr(wnd, buf);
    111 		} else {
    112 			wclrtoeol(wnd);
    113 			whline(wnd, 'X', max);
    114 		}
    115 		mb->m_mtypes[idx] = 0;
    116 	}
    117 	wmove(wnd, j, 0);
    118 	wclrtobot(wnd);
    119 }
    120 
    121 int
    122 initmbufs(void)
    123 {
    124 	if (mb == 0)
    125 		mb = calloc(1, sizeof (*mb));
    126 	return(1);
    127 }
    128 
    129 void
    130 fetchmbufs(void)
    131 {
    132 	size_t len = sizeof(*mb);
    133 	if (sysctlbyname("kern.mbuf.stats", mb, &len, NULL, 0))
    134 		error("error getting \"kern.mbuf.stats\": %s", strerror(errno));
    135 }
    136