185 lines
4.6 KiB
C
185 lines
4.6 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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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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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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#ifndef lint
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static 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 not lint
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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 not lint
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#include <sys/param.h>
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#include <sys/ioctl.h>
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#include <sys/syslog.h>
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#include <sys/ucred.h>
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#include <sys/wait.h>
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#include <sys/mount.h>
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#include <sys/time.h>
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#include <nfs/rpcv2.h>
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#include <nfs/nfsproto.h>
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#include <nfs/nfs.h>
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#include <err.h>
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#include <errno.h>
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#include <fcntl.h>
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#include <signal.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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/* Global defs */
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#ifdef DEBUG
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int debug = 1;
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#else
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int debug = 0;
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#endif
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void nonfs __P((int));
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void reapchild __P((int));
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void usage __P((void));
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/*
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* Nfsiod does asynchronous buffered I/O on behalf of the NFS client.
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* It does not have to be running for correct operation, but will
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* improve throughput.
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*/
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int
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main(argc, argv)
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int argc;
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char *argv[];
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{
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int ch, num_servers;
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struct vfsconf vfc;
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int error;
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error = getvfsbyname("nfs", &vfc);
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if (error && vfsisloadable("nfs")) {
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if (vfsload("nfs"))
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err(1, "vfsload(nfs)");
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endvfsent(); /* flush cache */
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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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#define MAXNFSDCNT 20
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#define DEFNFSDCNT 1
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num_servers = DEFNFSDCNT;
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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 || num_servers > MAXNFSDCNT) {
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warnx("nfsiod count %d; reset to %d",
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DEFNFSDCNT);
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num_servers = DEFNFSDCNT;
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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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/*
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* XXX
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* Backward compatibility, trailing number is the count of daemons.
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*/
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if (argc > 1)
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usage();
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if (argc == 1) {
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num_servers = atoi(argv[0]);
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if (num_servers < 1 || num_servers > MAXNFSDCNT) {
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warnx("nfsiod count %d; reset to %d", DEFNFSDCNT);
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num_servers = DEFNFSDCNT;
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}
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}
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if (debug == 0) {
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daemon(0, 0);
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(void)signal(SIGHUP, SIG_IGN);
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(void)signal(SIGINT, SIG_IGN);
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(void)signal(SIGQUIT, SIG_IGN);
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(void)signal(SIGSYS, nonfs);
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}
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(void)signal(SIGCHLD, reapchild);
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openlog("nfsiod:", LOG_PID, LOG_DAEMON);
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while (num_servers--)
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switch (fork()) {
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case -1:
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syslog(LOG_ERR, "fork: %m");
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exit (1);
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case 0:
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if (nfssvc(NFSSVC_BIOD, NULL) < 0) {
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syslog(LOG_ERR, "nfssvc: %m");
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exit (1);
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}
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exit(0);
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}
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exit (0);
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}
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void
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nonfs(signo)
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int signo;
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{
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syslog(LOG_ERR, "missing system call: NFS not available.");
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}
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void
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reapchild(signo)
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int signo;
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{
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while (wait3(NULL, WNOHANG, NULL) > 0) {
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/* nothing */
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};
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}
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void
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usage()
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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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