mbufs.c revision 160607 
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 160607 2006-07-24 01:49:24Z rwatson $");
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#include <paths.h>
51
52#include "systat.h"
53#include "extern.h"
54
55static struct mbstat *mbstat;
56static long *m_mbtypes;
57static short nmbtypes;
58
59static struct mtnames {
60	short mt_type;
61	const char *mt_name;
62} mtnames[] = {
63	{ MT_DATA, 	"data"},
64	{ MT_HEADER,	"headers"},
65	{ MT_SONAME,	"socknames"},
66	{ MT_CONTROL,	"control"},
67	{ MT_OOBDATA,	"oobdata"}
68};
69#define	NNAMES	(sizeof (mtnames) / sizeof (mtnames[0]))
70
71WINDOW *
72openmbufs()
73{
74	return (subwin(stdscr, LINES-3-1, 0, MAINWIN_ROW, 0));
75}
76
77void
78closembufs(w)
79	WINDOW *w;
80{
81	if (w == NULL)
82		return;
83	wclear(w);
84	wrefresh(w);
85	delwin(w);
86}
87
88void
89labelmbufs()
90{
91	wmove(wnd, 0, 0); wclrtoeol(wnd);
92	mvwaddstr(wnd, 0, 10,
93	    "/0   /5   /10  /15  /20  /25  /30  /35  /40  /45  /50  /55  /60");
94}
95
96void
97showmbufs()
98{
99	int i, j, max, idx;
100	u_long totmbufs;
101	char buf[10];
102	const char *mtname;
103
104	totmbufs = mbstat->m_mbufs;
105
106	/*
107	 * Print totals for different mbuf types.
108	 */
109	for (j = 0; j < wnd->_maxy; j++) {
110		max = 0, idx = -1;
111		for (i = 0; i < wnd->_maxy; i++) {
112			if (i == MT_NOTMBUF)
113				continue;
114			if (i >= nmbtypes)
115				break;
116			if (m_mbtypes[i] > max) {
117				max = m_mbtypes[i];
118				idx = i;
119			}
120		}
121		if (max == 0)
122			break;
123
124		mtname = NULL;
125		for (i = 0; i < (int)NNAMES; i++)
126			if (mtnames[i].mt_type == idx)
127				mtname = mtnames[i].mt_name;
128		if (mtname == NULL)
129			mvwprintw(wnd, 1+j, 0, "%10d", idx);
130		else
131			mvwprintw(wnd, 1+j, 0, "%-10.10s", mtname);
132		wmove(wnd, 1 + j, 10);
133		if (max > 60) {
134			snprintf(buf, sizeof(buf), " %d", max);
135			max = 60;
136			while (max--)
137				waddch(wnd, 'X');
138			waddstr(wnd, buf);
139		} else
140			while (max--)
141				waddch(wnd, 'X');
142		wclrtoeol(wnd);
143		m_mbtypes[idx] = 0;
144	}
145
146	/*
147	 * Print total number of free mbufs.
148	 */
149	if (totmbufs > 0) {
150		mvwprintw(wnd, 1+j, 0, "%-10.10s", "Mbufs");
151		if (totmbufs > 60) {
152			snprintf(buf, sizeof(buf), " %lu", totmbufs);
153			totmbufs = 60;
154			while(totmbufs--)
155				waddch(wnd, 'X');
156			waddstr(wnd, buf);
157		} else {
158			while(totmbufs--)
159				waddch(wnd, 'X');
160		}
161		wclrtoeol(wnd);
162		j++;
163	}
164	wmove(wnd, 1+j, 0); wclrtobot(wnd);
165}
166
167int
168initmbufs()
169{
170	size_t len;
171
172	len = sizeof *mbstat;
173	if ((mbstat = malloc(len)) == NULL) {
174		error("malloc mbstat failed");
175		return 0;
176	}
177	if (sysctlbyname("kern.ipc.mbstat", mbstat, &len, NULL, 0) < 0) {
178		error("sysctl retrieving mbstat");
179		return 0;
180	}
181	nmbtypes = mbstat->m_numtypes;
182	if ((m_mbtypes = calloc(nmbtypes, sizeof(long *))) == NULL) {
183		error("calloc m_mbtypes failed");
184		return 0;
185	}
186
187	return 1;
188}
189
190void
191fetchmbufs()
192{
193	size_t len;
194
195	len = sizeof *mbstat;
196	if (sysctlbyname("kern.ipc.mbstat", mbstat, &len, NULL, 0) < 0)
197		printw("sysctl: mbstat: %s", strerror(errno));
198}
199