1 /* 2 * Copyright (c) 1989, 1993 3 * The Regents of the University of California. All rights reserved. 4 * 5 * This code is derived from software contributed to Berkeley by 6 * Rick Macklem at The University of Guelph. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 3. All advertising materials mentioning features or use of this software 17 * must display the following acknowledgement: 18 * This product includes software developed by the University of 19 * California, Berkeley and its contributors. 20 * 4. Neither the name of the University nor the names of its contributors 21 * may be used to endorse or promote products derived from this software 22 * without specific prior written permission. 23 * 24 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 25 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 26 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 27 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 28 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 29 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 30 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 31 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 32 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 33 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 34 * SUCH DAMAGE. 35 * 36 * @(#) Copyright (c) 1989, 1993 The Regents of the University of California. All rights reserved. 37 * @(#)nfsiod.c 8.4 (Berkeley) 5/3/95 38 * $FreeBSD: src/sbin/nfsiod/nfsiod.c,v 1.9 1999/08/28 00:13:55 peter Exp $ 39 * $DragonFly: src/sbin/nfsiod/nfsiod.c,v 1.4 2003/11/01 17:16:01 drhodus Exp $ 40 */ 41 42 #include <sys/param.h> 43 #include <sys/syslog.h> 44 #include <sys/wait.h> 45 #include <sys/mount.h> 46 #include <sys/time.h> 47 48 #include <nfs/rpcv2.h> 49 #include <nfs/nfs.h> 50 51 #include <err.h> 52 #include <stdio.h> 53 #include <stdlib.h> 54 #include <unistd.h> 55 56 /* Global defs */ 57 #ifdef DEBUG 58 int debug = 1; 59 #else 60 int debug = 0; 61 #endif 62 63 void nonfs(int); 64 void reapchild(int); 65 void usage(void); 66 67 /* 68 * Nfsiod does asynchronous buffered I/O on behalf of the NFS client. 69 * It does not have to be running for correct operation, but will 70 * improve throughput. 71 */ 72 int 73 main(int argc, char **argv) 74 { 75 int ch, num_servers; 76 struct vfsconf vfc; 77 int error; 78 79 error = getvfsbyname("nfs", &vfc); 80 if (error && vfsisloadable("nfs")) { 81 if (vfsload("nfs")) 82 err(1, "vfsload(nfs)"); 83 endvfsent(); /* flush cache */ 84 error = getvfsbyname("nfs", &vfc); 85 } 86 if(error) 87 errx(1, "NFS support is not available in the running kernel"); 88 89 #define MAXNFSDCNT 20 90 #define DEFNFSDCNT 1 91 num_servers = DEFNFSDCNT; 92 while ((ch = getopt(argc, argv, "n:")) != -1) 93 switch (ch) { 94 case 'n': 95 num_servers = atoi(optarg); 96 if (num_servers < 1 || num_servers > MAXNFSDCNT) { 97 warnx("nfsiod count %d; reset to %d", 98 num_servers, DEFNFSDCNT); 99 num_servers = DEFNFSDCNT; 100 } 101 break; 102 case '?': 103 default: 104 usage(); 105 } 106 argc -= optind; 107 argv += optind; 108 109 /* 110 * XXX 111 * Backward compatibility, trailing number is the count of daemons. 112 */ 113 if (argc > 1) 114 usage(); 115 if (argc == 1) { 116 num_servers = atoi(argv[0]); 117 if (num_servers < 1 || num_servers > MAXNFSDCNT) { 118 warnx("nfsiod count %d; reset to %d", num_servers, 119 DEFNFSDCNT); 120 num_servers = DEFNFSDCNT; 121 } 122 } 123 124 if (debug == 0) { 125 daemon(0, 0); 126 (void)signal(SIGHUP, SIG_IGN); 127 (void)signal(SIGINT, SIG_IGN); 128 (void)signal(SIGQUIT, SIG_IGN); 129 (void)signal(SIGSYS, nonfs); 130 } 131 (void)signal(SIGCHLD, reapchild); 132 133 openlog("nfsiod:", LOG_PID, LOG_DAEMON); 134 135 while (num_servers--) 136 switch (fork()) { 137 case -1: 138 syslog(LOG_ERR, "fork: %m"); 139 exit (1); 140 case 0: 141 if (nfssvc(NFSSVC_BIOD, NULL) < 0) { 142 syslog(LOG_ERR, "nfssvc: %m"); 143 exit (1); 144 } 145 exit(0); 146 } 147 exit (0); 148 } 149 150 void 151 nonfs(int signo) 152 { 153 syslog(LOG_ERR, "missing system call: NFS not available"); 154 } 155 156 void 157 reapchild(int signo) 158 { 159 160 while (wait3(NULL, WNOHANG, NULL) > 0) { 161 /* nothing */ 162 }; 163 } 164 165 void 166 usage(void) 167 { 168 (void)fprintf(stderr, "usage: nfsiod [-n num_servers]\n"); 169 exit(1); 170 } 171