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 *
openmbufs(void)57 openmbufs(void)
58 {
59
60 return (subwin(stdscr, -1, 0, 5, 0));
61 }
62
63 void
closembufs(WINDOW * w)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
labelmbufs(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
showmbufs(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
initmbufs(void)122 initmbufs(void)
123 {
124 if (mb == 0)
125 mb = calloc(1, sizeof (*mb));
126 return(1);
127 }
128
129 void
fetchmbufs(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