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 1.2 2003/06/17 04:27:34 dillon 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 __P((int)); 64 void reapchild __P((int)); 65 void usage __P((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(argc, argv) 74 int argc; 75 char *argv[]; 76 { 77 int ch, num_servers; 78 struct vfsconf vfc; 79 int error; 80 81 error = getvfsbyname("nfs", &vfc); 82 if (error && vfsisloadable("nfs")) { 83 if (vfsload("nfs")) 84 err(1, "vfsload(nfs)"); 85 endvfsent(); /* flush cache */ 86 error = getvfsbyname("nfs", &vfc); 87 } 88 if(error) 89 errx(1, "NFS support is not available in the running kernel"); 90 91 #define MAXNFSDCNT 20 92 #define DEFNFSDCNT 1 93 num_servers = DEFNFSDCNT; 94 while ((ch = getopt(argc, argv, "n:")) != -1) 95 switch (ch) { 96 case 'n': 97 num_servers = atoi(optarg); 98 if (num_servers < 1 || num_servers > MAXNFSDCNT) { 99 warnx("nfsiod count %d; reset to %d", 100 num_servers, DEFNFSDCNT); 101 num_servers = DEFNFSDCNT; 102 } 103 break; 104 case '?': 105 default: 106 usage(); 107 } 108 argc -= optind; 109 argv += optind; 110 111 /* 112 * XXX 113 * Backward compatibility, trailing number is the count of daemons. 114 */ 115 if (argc > 1) 116 usage(); 117 if (argc == 1) { 118 num_servers = atoi(argv[0]); 119 if (num_servers < 1 || num_servers > MAXNFSDCNT) { 120 warnx("nfsiod count %d; reset to %d", num_servers, 121 DEFNFSDCNT); 122 num_servers = DEFNFSDCNT; 123 } 124 } 125 126 if (debug == 0) { 127 daemon(0, 0); 128 (void)signal(SIGHUP, SIG_IGN); 129 (void)signal(SIGINT, SIG_IGN); 130 (void)signal(SIGQUIT, SIG_IGN); 131 (void)signal(SIGSYS, nonfs); 132 } 133 (void)signal(SIGCHLD, reapchild); 134 135 openlog("nfsiod:", LOG_PID, LOG_DAEMON); 136 137 while (num_servers--) 138 switch (fork()) { 139 case -1: 140 syslog(LOG_ERR, "fork: %m"); 141 exit (1); 142 case 0: 143 if (nfssvc(NFSSVC_BIOD, NULL) < 0) { 144 syslog(LOG_ERR, "nfssvc: %m"); 145 exit (1); 146 } 147 exit(0); 148 } 149 exit (0); 150 } 151 152 void 153 nonfs(signo) 154 int signo; 155 { 156 syslog(LOG_ERR, "missing system call: NFS not available"); 157 } 158 159 void 160 reapchild(signo) 161 int signo; 162 { 163 164 while (wait3(NULL, WNOHANG, NULL) > 0) { 165 /* nothing */ 166 }; 167 } 168 169 void 170 usage() 171 { 172 (void)fprintf(stderr, "usage: nfsiod [-n num_servers]\n"); 173 exit(1); 174 } 175