Return to mbufs.c CVS log

Up to [local] / src / usr.bin / systat

New display engine for systat, based on pftop. Adds new views for pf
(status, state, rule, queue). While all displays work, some keyboard
comands are not implemented yet. Other features include better handling
of display resize and scrolling for long views. Committing now to fix
the remaining issues in the tree.
Testing and comments by otto@ and harding@, ok deraadt@

/*	$OpenBSD: mbufs.c,v 1.18 2008/06/12 22:26:01 canacar Exp $	*/
/*	$NetBSD: mbufs.c,v 1.2 1995/01/20 08:52:02 jtc Exp $	*/

/*-
 * Copyright (c) 1980, 1992, 1993
 *	The Regents of the University of California.  All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. Neither the name of the University nor the names of its contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 */

#include <sys/param.h>
#include <sys/types.h>
#include <sys/mbuf.h>
#include <sys/sysctl.h>

#include <stdlib.h>
#include <string.h>
#include <err.h>
#include <paths.h>
#include "systat.h"


void print_mb(void);
int read_mb(void);
int select_mb(void);
static void showmbuf(int);

static struct mbstat mb;

char *mtnames[] = {
	"free",
	"data",
	"headers",
	"sockets",
	"pcbs",
	"routes",
	"hosts",
	"arps",
	"socknames",
	"zombies",
	"sockopts",
	"frags",
	"rights",
	"ifaddrs",
};

#define NUM_TYPES (sizeof(mb.m_mtypes) / sizeof(mb.m_mtypes[0]))
#define	NNAMES	(sizeof (mtnames) / sizeof (mtnames[0]))

int mb_index[NUM_TYPES];
int mbuf_cnt = 0;


field_def fields_mb[] = {
	{"TYPE", 6, 16, 1, FLD_ALIGN_RIGHT, -1, 0, 0, 0},
	{"VALUE", 5, 8, 1, FLD_ALIGN_RIGHT, -1, 0, 0, 0},
	{"", 40, 80, 1, FLD_ALIGN_BAR, -1, 0, 0, 60},
};

#define FIELD_ADDR(x) (&fields_mb[x])

#define FLD_MB_NAME	FIELD_ADDR(0)
#define FLD_MB_VALUE	FIELD_ADDR(1)
#define FLD_MB_BAR	FIELD_ADDR(2)

/* Define views */
field_def *view_mb_0[] = {
	FLD_MB_NAME, FLD_MB_VALUE, FLD_MB_BAR, NULL
};


/* Define view managers */
struct view_manager mbuf_mgr = {
	"Mbufs", select_mb, read_mb, NULL, print_header,
	print_mb, keyboard_callback, NULL, NULL
};

field_view views_mb[] = {
	{view_mb_0, "mbufs", '4', &mbuf_mgr},
	{NULL, NULL, 0, NULL}
};


int
select_mb(void)
{
	int i, w = 50;

	read_mb();
	for (i = 0; i < NUM_TYPES; i++)
		if (w < (5 * mb.m_mtypes[i] / 4))
			w = 5 * mb.m_mtypes[i] / 4;

	w -= w % 10;
	FLD_MB_BAR->arg = w;

	return (0);
}

int
read_mb(void)
{
	int mib[2], i;
	size_t size = sizeof (mb);

	mib[0] = CTL_KERN;
	mib[1] = KERN_MBSTAT;

	if (sysctl(mib, 2, &mb, &size, NULL, 0) < 0) {
		error("sysctl(KERN_MBSTAT) failed");
		return 1;
	}

	mbuf_cnt = 0;
	memset(mb_index, 0, sizeof(mb_index));

	for (i = 0; i < NUM_TYPES; i++) {
		if (mb.m_mtypes[i])
			mb_index[mbuf_cnt++] = i;
	}

	num_disp = mbuf_cnt;

	return 0;
}


void
print_mb(void)
{
	int n, count = 0;

	for (n = dispstart; n < num_disp; n++) {
		showmbuf(n);
		count++;
		if (maxprint > 0 && count >= maxprint)
			break;
	}
}

int
initmembufs(void)
{
	field_view *v;

	for (v = views_mb; v->name != NULL; v++)
		add_view(v);

	return(1);
}


static void
showmbuf(int m)
{
	int i;

	i = mb_index[m];

	if (i < NNAMES)
		print_fld_str(FLD_MB_NAME, mtnames[i]);
	else
		print_fld_uint(FLD_MB_NAME, i);

	print_fld_uint(FLD_MB_VALUE, mb.m_mtypes[i]);
	print_fld_bar(FLD_MB_BAR, mb.m_mtypes[i]);

	end_line();
}