| 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 1.5 2004/11/14 20:07:25 liamfoy Exp $ |
| 40 | */ |
| 41 | |
| 42 | #include <sys/param.h> |
| 43 | #include <sys/syslog.h> |
| 44 | #include <sys/wait.h> |
| 45 | #include <sys/mount.h> |
| 46 | |
| 47 | #include <nfs/rpcv2.h> |
| 48 | #include <nfs/nfs.h> |
| 49 | |
| 50 | #include <err.h> |
| 51 | #include <stdio.h> |
| 52 | #include <stdlib.h> |
| 53 | #include <unistd.h> |
| 54 | |
| 55 | /* Global defs */ |
| 56 | #ifdef DEBUG |
| 57 | int debug = 1; |
| 58 | #else |
| 59 | int debug = 0; |
| 60 | #endif |
| 61 | |
| 62 | static void nonfs(int); |
| 63 | static void reapchild(int); |
| 64 | static void usage(void); |
| 65 | |
| 66 | /* |
| 67 | * Nfsiod does asynchronous buffered I/O on behalf of the NFS client. |
| 68 | * It does not have to be running for correct operation, but will |
| 69 | * improve throughput. |
| 70 | */ |
| 71 | int |
| 72 | main(int argc, char **argv) |
| 73 | { |
| 74 | int ch, num_servers; |
| 75 | struct vfsconf vfc; |
| 76 | int error; |
| 77 | |
| 78 | error = getvfsbyname("nfs", &vfc); |
| 79 | if (error && vfsisloadable("nfs")) { |
| 80 | if (vfsload("nfs")) |
| 81 | err(1, "vfsload(nfs)"); |
| 82 | endvfsent(); /* flush cache */ |
| 83 | error = getvfsbyname("nfs", &vfc); |
| 84 | } |
| 85 | if(error) |
| 86 | errx(1, "NFS support is not available in the running kernel"); |
| 87 | |
| 88 | #define MAXNFSDCNT 20 |
| 89 | #define DEFNFSDCNT 1 |
| 90 | num_servers = DEFNFSDCNT; |
| 91 | while ((ch = getopt(argc, argv, "n:")) != -1) |
| 92 | switch (ch) { |
| 93 | case 'n': |
| 94 | num_servers = atoi(optarg); |
| 95 | if (num_servers < 1 || num_servers > MAXNFSDCNT) { |
| 96 | warnx("nfsiod count %d; reset to %d", |
| 97 | num_servers, DEFNFSDCNT); |
| 98 | num_servers = DEFNFSDCNT; |
| 99 | } |
| 100 | break; |
| 101 | default: |
| 102 | usage(); |
| 103 | } |
| 104 | argc -= optind; |
| 105 | argv += optind; |
| 106 | |
| 107 | /* |
| 108 | * XXX |
| 109 | * Backward compatibility, trailing number is the count of daemons. |
| 110 | */ |
| 111 | if (argc > 1) |
| 112 | usage(); |
| 113 | if (argc == 1) { |
| 114 | num_servers = atoi(argv[0]); |
| 115 | if (num_servers < 1 || num_servers > MAXNFSDCNT) { |
| 116 | warnx("nfsiod count %d; reset to %d", num_servers, |
| 117 | DEFNFSDCNT); |
| 118 | num_servers = DEFNFSDCNT; |
| 119 | } |
| 120 | } |
| 121 | |
| 122 | if (debug == 0) { |
| 123 | daemon(0, 0); |
| 124 | signal(SIGHUP, SIG_IGN); |
| 125 | signal(SIGINT, SIG_IGN); |
| 126 | signal(SIGQUIT, SIG_IGN); |
| 127 | signal(SIGSYS, nonfs); |
| 128 | } |
| 129 | signal(SIGCHLD, reapchild); |
| 130 | |
| 131 | openlog("nfsiod:", LOG_PID, LOG_DAEMON); |
| 132 | |
| 133 | while (num_servers--) |
| 134 | switch (fork()) { |
| 135 | case -1: |
| 136 | syslog(LOG_ERR, "fork: %m"); |
| 137 | exit (1); |
| 138 | case 0: |
| 139 | if (nfssvc(NFSSVC_BIOD, NULL) < 0) { |
| 140 | syslog(LOG_ERR, "nfssvc: %m"); |
| 141 | exit (1); |
| 142 | } |
| 143 | exit(0); |
| 144 | } |
| 145 | exit (0); |
| 146 | } |
| 147 | |
| 148 | static void |
| 149 | nonfs(int signo __unused) |
| 150 | { |
| 151 | syslog(LOG_ERR, "missing system call: NFS not available"); |
| 152 | } |
| 153 | |
| 154 | static void |
| 155 | reapchild(int signo __unused) |
| 156 | { |
| 157 | |
| 158 | while (wait3(NULL, WNOHANG, NULL) > 0) |
| 159 | ; |
| 160 | } |
| 161 | |
| 162 | static void |
| 163 | usage(void) |
| 164 | { |
| 165 | fprintf(stderr, "usage: nfsiod [-n num_servers]\n"); |
| 166 | exit(1); |
| 167 | } |