mbufs.c revision 200420 
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: head/usr.bin/systat/mbufs.c 200420 2009-12-11 23:35:38Z delphij $");
37
38#ifdef lint
39static 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
51#include "systat.h"
52#include "extern.h"
53
54static struct mbstat *mbstat;
55static long *m_mbtypes;
56static short nmbtypes;
57
58static struct mtnames {
59	short mt_type;
60	const char *mt_name;
61} mtnames[] = {
62	{ MT_DATA, 	"data"},
63	{ MT_HEADER,	"headers"},
64	{ MT_SONAME,	"socknames"},
65	{ MT_CONTROL,	"control"},
66	{ MT_OOBDATA,	"oobdata"}
67};
68#define	NNAMES	(sizeof (mtnames) / sizeof (mtnames[0]))
69
70WINDOW *
71openmbufs(void)
72{
73	return (subwin(stdscr, LINES-3-1, 0, MAINWIN_ROW, 0));
74}
75
76void
77closembufs(WINDOW *w)
78{
79	if (w == NULL)
80		return;
81	wclear(w);
82	wrefresh(w);
83	delwin(w);
84}
85
86void
87labelmbufs(void)
88{
89	wmove(wnd, 0, 0); wclrtoeol(wnd);
90	mvwaddstr(wnd, 0, 10,
91	    "/0   /5   /10  /15  /20  /25  /30  /35  /40  /45  /50  /55  /60");
92}
93
94void
95showmbufs(void)
96{
97	int i, j, max, idx;
98	u_long totmbufs;
99	char buf[10];
100	const char *mtname;
101
102	totmbufs = mbstat->m_mbufs;
103
104	/*
105	 * Print totals for different mbuf types.
106	 */
107	for (j = 0; j < wnd->_maxy; j++) {
108		max = 0, idx = -1;
109		for (i = 0; i < wnd->_maxy; i++) {
110			if (i == MT_NOTMBUF)
111				continue;
112			if (i >= nmbtypes)
113				break;
114			if (m_mbtypes[i] > max) {
115				max = m_mbtypes[i];
116				idx = i;
117			}
118		}
119		if (max == 0)
120			break;
121
122		mtname = NULL;
123		for (i = 0; i < (int)NNAMES; i++)
124			if (mtnames[i].mt_type == idx)
125				mtname = mtnames[i].mt_name;
126		if (mtname == NULL)
127			mvwprintw(wnd, 1+j, 0, "%10d", idx);
128		else
129			mvwprintw(wnd, 1+j, 0, "%-10.10s", mtname);
130		wmove(wnd, 1 + j, 10);
131		if (max > 60) {
132			snprintf(buf, sizeof(buf), " %d", max);
133			max = 60;
134			while (max--)
135				waddch(wnd, 'X');
136			waddstr(wnd, buf);
137		} else
138			while (max--)
139				waddch(wnd, 'X');
140		wclrtoeol(wnd);
141		m_mbtypes[idx] = 0;
142	}
143
144	/*
145	 * Print total number of free mbufs.
146	 */
147	if (totmbufs > 0) {
148		mvwprintw(wnd, 1+j, 0, "%-10.10s", "Mbufs");
149		if (totmbufs > 60) {
150			snprintf(buf, sizeof(buf), " %lu", totmbufs);
151			totmbufs = 60;
152			while(totmbufs--)
153				waddch(wnd, 'X');
154			waddstr(wnd, buf);
155		} else {
156			while(totmbufs--)
157				waddch(wnd, 'X');
158		}
159		wclrtoeol(wnd);
160		j++;
161	}
162	wmove(wnd, 1+j, 0); wclrtobot(wnd);
163}
164
165int
166initmbufs(void)
167{
168	size_t len;
169
170	len = sizeof *mbstat;
171	if ((mbstat = malloc(len)) == NULL) {
172		error("malloc mbstat failed");
173		return 0;
174	}
175	if (sysctlbyname("kern.ipc.mbstat", mbstat, &len, NULL, 0) < 0) {
176		error("sysctl retrieving mbstat");
177		return 0;
178	}
179	nmbtypes = mbstat->m_numtypes;
180	if ((m_mbtypes = calloc(nmbtypes, sizeof(long *))) == NULL) {
181		error("calloc m_mbtypes failed");
182		return 0;
183	}
184
185	return 1;
186}
187
188void
189fetchmbufs(void)
190{
191	size_t len;
192
193	len = sizeof *mbstat;
194	if (sysctlbyname("kern.ipc.mbstat", mbstat, &len, NULL, 0) < 0)
195		printw("sysctl: mbstat: %s", strerror(errno));
196}
197