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/*
* Copyright (c) 1989, 1993
* The Regents of the University of California. All rights reserved.
*
* This code is derived from software contributed to Berkeley by
* Rick Macklem at The University of Guelph.
*
* 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.
* 4. 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.
*/
#if 0
#ifndef lint
static const char copyright[] =
"@(#) Copyright (c) 1989, 1993\n\
The Regents of the University of California. All rights reserved.\n";
#endif
#ifndef lint
static char sccsid[] = "@(#)nfsiod.c 8.4 (Berkeley) 5/3/95";
#endif
#endif
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include <sys/param.h>
#include <sys/syslog.h>
#include <sys/wait.h>
#include <sys/linker.h>
#include <sys/mount.h>
#include <sys/sysctl.h>
#include <err.h>
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#define MAXNFSDCNT 20
static void
usage(void)
{
(void)fprintf(stderr, "usage: nfsiod [-n num_servers]\n");
exit(1);
}
int
main(int argc, char *argv[])
{
int ch;
struct xvfsconf vfc;
int error;
unsigned int iodmin, iodmax, num_servers;
size_t len;
error = getvfsbyname("nfs", &vfc);
if (error) {
if (kldload("nfs") == -1)
err(1, "kldload(nfs)");
error = getvfsbyname("nfs", &vfc);
}
if (error)
errx(1, "NFS support is not available in the running kernel");
num_servers = 0;
while ((ch = getopt(argc, argv, "n:")) != -1)
switch (ch) {
case 'n':
num_servers = atoi(optarg);
if (num_servers < 1) {
warnx("nfsiod count %d; reset to %d",
num_servers, 1);
num_servers = 1;
}
if (num_servers > MAXNFSDCNT) {
warnx("nfsiod count %d; reset to %d",
num_servers, MAXNFSDCNT);
num_servers = MAXNFSDCNT;
}
break;
case '?':
default:
usage();
}
argc -= optind;
argv += optind;
if (argc > 0)
usage();
if (num_servers == 0)
exit(0); /* no change */
len = sizeof iodmin;
error = sysctlbyname("vfs.nfs.iodmin", &iodmin, &len, NULL, 0);
if (error < 0)
err(1, "sysctlbyname(\"vfs.nfs.iodmin\")");
len = sizeof iodmax;
error = sysctlbyname("vfs.nfs.iodmax", &iodmax, &len, NULL, 0);
if (error < 0)
err(1, "sysctlbyname(\"vfs.nfs.iodmax\")");
/* Catch the case where we're lowering num_servers below iodmin */
if (iodmin > num_servers) {
iodmin = num_servers;
error = sysctlbyname("vfs.nfs.iodmin", NULL, 0, &iodmin,
sizeof iodmin);
if (error < 0)
err(1, "sysctlbyname(\"vfs.nfs.iodmin\")");
}
iodmax = num_servers;
error = sysctlbyname("vfs.nfs.iodmax", NULL, 0, &iodmax, sizeof iodmax);
if (error < 0)
err(1, "sysctlbyname(\"vfs.nfs.iodmax\")");
exit (0);
}
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