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140 lines
4.0 KiB
C
140 lines
4.0 KiB
C
/*
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* Copyright (c) 1989, 1993
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* The Regents of the University of California. All rights reserved.
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*
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* This code is derived from software contributed to Berkeley by
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* Rick Macklem at The University of Guelph.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#if 0
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#ifndef lint
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static const char copyright[] =
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"@(#) Copyright (c) 1989, 1993\n\
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The Regents of the University of California. All rights reserved.\n";
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#endif
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#ifndef lint
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static char sccsid[] = "@(#)nfsiod.c 8.4 (Berkeley) 5/3/95";
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#endif
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#endif
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include <sys/param.h>
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#include <sys/syslog.h>
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#include <sys/wait.h>
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#include <sys/linker.h>
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#include <sys/mount.h>
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#include <sys/sysctl.h>
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#include <err.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <unistd.h>
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#define MAXNFSDCNT 20
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static void
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usage(void)
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{
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(void)fprintf(stderr, "usage: nfsiod [-n num_servers]\n");
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exit(1);
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}
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int
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main(int argc, char *argv[])
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{
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int ch;
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struct xvfsconf vfc;
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int error;
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unsigned int iodmin, iodmax, num_servers;
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size_t len;
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error = getvfsbyname("nfs", &vfc);
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if (error) {
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if (kldload("nfs") == -1)
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err(1, "kldload(nfs)");
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error = getvfsbyname("nfs", &vfc);
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}
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if (error)
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errx(1, "NFS support is not available in the running kernel");
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num_servers = 0;
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while ((ch = getopt(argc, argv, "n:")) != -1)
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switch (ch) {
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case 'n':
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num_servers = atoi(optarg);
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if (num_servers < 1) {
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warnx("nfsiod count %u; reset to %d",
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num_servers, 1);
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num_servers = 1;
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}
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if (num_servers > MAXNFSDCNT) {
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warnx("nfsiod count %u; reset to %d",
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num_servers, MAXNFSDCNT);
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num_servers = MAXNFSDCNT;
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}
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break;
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case '?':
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default:
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usage();
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}
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argc -= optind;
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argv += optind;
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if (argc > 0)
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usage();
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len = sizeof iodmin;
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error = sysctlbyname("vfs.nfs.iodmin", &iodmin, &len, NULL, 0);
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if (error < 0)
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err(1, "sysctlbyname(\"vfs.nfs.iodmin\")");
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len = sizeof iodmax;
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error = sysctlbyname("vfs.nfs.iodmax", &iodmax, &len, NULL, 0);
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if (error < 0)
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err(1, "sysctlbyname(\"vfs.nfs.iodmax\")");
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if (num_servers == 0) { /* no change */
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printf("vfs.nfs.iodmin=%u\nvfs.nfs.iodmax=%u\n",
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iodmin, iodmax);
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exit(0);
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}
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/* Catch the case where we're lowering num_servers below iodmin */
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if (iodmin > num_servers) {
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iodmin = num_servers;
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error = sysctlbyname("vfs.nfs.iodmin", NULL, 0, &iodmin,
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sizeof iodmin);
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if (error < 0)
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err(1, "sysctlbyname(\"vfs.nfs.iodmin\")");
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}
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iodmax = num_servers;
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error = sysctlbyname("vfs.nfs.iodmax", NULL, 0, &iodmax, sizeof iodmax);
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if (error < 0)
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err(1, "sysctlbyname(\"vfs.nfs.iodmax\")");
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exit (0);
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}
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