mbufs.c revision 129906 
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 129906 2004-05-31 21:46:06Z bmilekic $");
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_FTABLE,	"frags"},
67	{ MT_CONTROL,	"control"},
68	{ MT_OOBDATA,	"oobdata"}
69};
70#define	NNAMES	(sizeof (mtnames) / sizeof (mtnames[0]))
71
72WINDOW *
73openmbufs()
74{
75	return (subwin(stdscr, LINES-5-1, 0, 5, 0));
76}
77
78void
79closembufs(w)
80	WINDOW *w;
81{
82	if (w == NULL)
83		return;
84	wclear(w);
85	wrefresh(w);
86	delwin(w);
87}
88
89void
90labelmbufs()
91{
92	wmove(wnd, 0, 0); wclrtoeol(wnd);
93	mvwaddstr(wnd, 0, 10,
94	    "/0   /5   /10  /15  /20  /25  /30  /35  /40  /45  /50  /55  /60");
95}
96
97void
98showmbufs()
99{
100	int i, j, max, idx;
101	u_long totmbufs;
102	char buf[10];
103	const char *mtname;
104
105	totmbufs = mbstat->m_mbufs;
106
107	/*
108	 * Print totals for different mbuf types.
109	 */
110	for (j = 0; j < wnd->_maxy; j++) {
111		max = 0, idx = -1;
112		for (i = 0; i < wnd->_maxy; i++) {
113			if (i == MT_NOTMBUF)
114				continue;
115			if (i >= nmbtypes)
116				break;
117			if (m_mbtypes[i] > max) {
118				max = m_mbtypes[i];
119				idx = i;
120			}
121		}
122		if (max == 0)
123			break;
124
125		mtname = NULL;
126		for (i = 0; i < (int)NNAMES; i++)
127			if (mtnames[i].mt_type == idx)
128				mtname = mtnames[i].mt_name;
129		if (mtname == NULL)
130			mvwprintw(wnd, 1+j, 0, "%10d", idx);
131		else
132			mvwprintw(wnd, 1+j, 0, "%-10.10s", mtname);
133		wmove(wnd, 1 + j, 10);
134		if (max > 60) {
135			snprintf(buf, sizeof(buf), " %d", max);
136			max = 60;
137			while (max--)
138				waddch(wnd, 'X');
139			waddstr(wnd, buf);
140		} else
141			while (max--)
142				waddch(wnd, 'X');
143		wclrtoeol(wnd);
144		m_mbtypes[idx] = 0;
145	}
146
147	/*
148	 * Print total number of free mbufs.
149	 */
150	if (totmbufs > 0) {
151		mvwprintw(wnd, 1+j, 0, "%-10.10s", "Mbufs");
152		if (totmbufs > 60) {
153			snprintf(buf, sizeof(buf), " %lu", totmbufs);
154			totmbufs = 60;
155			while(totmbufs--)
156				waddch(wnd, 'X');
157			waddstr(wnd, buf);
158		} else {
159			while(totmbufs--)
160				waddch(wnd, 'X');
161		}
162		wclrtoeol(wnd);
163		j++;
164	}
165	wmove(wnd, 1+j, 0); wclrtobot(wnd);
166}
167
168int
169initmbufs()
170{
171	int i;
172	size_t len;
173
174	len = sizeof *mbstat;
175	if ((mbstat = malloc(len)) == NULL) {
176		error("malloc mbstat failed");
177		return 0;
178	}
179	if (sysctlbyname("kern.ipc.mbstat", mbstat, &len, NULL, 0) < 0) {
180		error("sysctl retrieving mbstat");
181		return 0;
182	}
183	nmbtypes = mbstat->m_numtypes;
184	if ((m_mbtypes = calloc(nmbtypes, sizeof(long *))) == NULL) {
185		error("calloc m_mbtypes failed");
186		return 0;
187	}
188
189	return 1;
190}
191
192void
193fetchmbufs()
194{
195	size_t len;
196
197	len = sizeof *mbstat;
198	if (sysctlbyname("kern.ipc.mbstat", mbstat, &len, NULL, 0) < 0)
199		printw("sysctl: mbstat: %s", strerror(errno));
200}
201