1 /* 2 * Copyright (c) 2011-2015 The DragonFly Project. All rights reserved. 3 * 4 * This code is derived from software contributed to The DragonFly Project 5 * by Matthew Dillon <dillon@dragonflybsd.org> 6 * by Venkatesh Srinivas <vsrinivas@dragonflybsd.org> 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 * 12 * 1. Redistributions of source code must retain the above copyright 13 * notice, this list of conditions and the following disclaimer. 14 * 2. Redistributions in binary form must reproduce the above copyright 15 * notice, this list of conditions and the following disclaimer in 16 * the documentation and/or other materials provided with the 17 * distribution. 18 * 3. Neither the name of The DragonFly Project nor the names of its 19 * contributors may be used to endorse or promote products derived 20 * from this software without specific, prior written permission. 21 * 22 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 23 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 24 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS 25 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE 26 * COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, 27 * INCIDENTAL, SPECIAL, EXEMPLARY OR CONSEQUENTIAL DAMAGES (INCLUDING, 28 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 29 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED 30 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 31 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT 32 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 33 * SUCH DAMAGE. 34 */ 35 #include <sys/types.h> 36 #include <sys/param.h> 37 #include <sys/mount.h> 38 #include <sys/socket.h> 39 #include <netinet/in.h> 40 #include <vfs/hammer2/hammer2_mount.h> 41 42 #include <stdio.h> 43 #include <stdlib.h> 44 #include <stdarg.h> 45 #include <string.h> 46 #include <unistd.h> 47 #include <dmsg.h> 48 #include <mntopts.h> 49 50 static int cluster_connect(const char *volume); 51 static void usage(const char *ctl, ...); 52 53 static struct mntopt mopts[] = { 54 MOPT_STDOPTS, 55 { "update", 0, MNT_UPDATE, 0 }, 56 { "local", 0, HMNT2_LOCAL, 1 }, 57 MOPT_NULL 58 }; 59 60 /* 61 * Usage: mount_hammer2 [volume] [mtpt] 62 */ 63 int 64 main(int ac, char *av[]) 65 { 66 struct hammer2_mount_info info; 67 struct vfsconf vfc; 68 char *mountpt; 69 char *devpath; 70 int error; 71 int ch; 72 int mount_flags; 73 int init_flags; 74 75 bzero(&info, sizeof(info)); 76 mount_flags = 0; 77 init_flags = 0; 78 79 while ((ch = getopt(ac, av, "o:u")) != -1) { 80 switch(ch) { 81 case 'o': 82 getmntopts(optarg, mopts, &mount_flags, &info.hflags); 83 break; 84 case 'u': 85 init_flags |= MNT_UPDATE; 86 break; 87 default: 88 usage("unknown option: -%c", ch); 89 /* not reached */ 90 } 91 } 92 ac -= optind; 93 av += optind; 94 mount_flags |= init_flags; 95 96 error = getvfsbyname("hammer2", &vfc); 97 if (error) { 98 fprintf(stderr, "hammer2 vfs not loaded\n"); 99 exit(1); 100 } 101 102 /* 103 * Only the mount point need be specified in update mode. 104 */ 105 if (init_flags & MNT_UPDATE) { 106 if (ac != 1) { 107 usage("missing parameter (mountpoint)"); 108 /* not reached */ 109 } 110 mountpt = av[0]; 111 if (mount(vfc.vfc_name, mountpt, mount_flags, &info)) 112 usage("mount %s: %s", mountpt, strerror(errno)); 113 exit(0); 114 } 115 116 /* 117 * New mount 118 */ 119 if (ac != 2) { 120 usage("missing parameter(s) (dev@LABEL mountpt)"); 121 /* not reached */ 122 } 123 124 devpath = strdup(av[0]); 125 mountpt = av[1]; 126 127 /* 128 * Automatically add @LOCAL if no label specified. 129 */ 130 if (strchr(devpath, '@') == NULL) { 131 asprintf(&devpath, "%s@LOCAL", devpath); 132 } 133 134 /* 135 * Connect to the cluster controller. This handles both remote 136 * mounts and device cache/master/slave mounts. 137 * 138 * When doing remote mounts that are allowed to run in the background 139 * the mount program will fork, detach, print a message, and exit(0) 140 * the originator while retrying in the background. 141 */ 142 info.cluster_fd = cluster_connect(devpath); 143 if (info.cluster_fd < 0) { 144 fprintf(stderr, 145 "hammer2_mount: cluster_connect(%s) failed\n", 146 devpath); 147 exit(1); 148 } 149 150 /* 151 * Try to mount it, prefix if necessary. 152 */ 153 if (devpath[0] != '/' && devpath[0] != '@') { 154 char *p2; 155 asprintf(&p2, "/dev/%s", devpath); 156 free(devpath); 157 devpath = p2; 158 } 159 info.volume = devpath; 160 161 error = mount(vfc.vfc_name, mountpt, mount_flags, &info); 162 if (error < 0) { 163 if (errno == ERANGE) { 164 fprintf(stderr, 165 "%s integrated with %s\n", 166 info.volume, mountpt); 167 } else { 168 perror("mount: "); 169 exit(1); 170 } 171 } 172 free(devpath); 173 174 /* 175 * XXX fork a backgrounded reconnector process to handle connection 176 * failures. XXX 177 */ 178 179 return (0); 180 } 181 182 /* 183 * Connect to the cluster controller. We can connect to a local or remote 184 * cluster controller, depending. For a multi-node cluster we always want 185 * to connect to the local controller and let it maintain the connections 186 * to the multiple remote nodes. 187 */ 188 static 189 int 190 cluster_connect(const char *volume __unused) 191 { 192 struct sockaddr_in lsin; 193 int fd; 194 195 /* 196 * This starts the hammer2 service if it isn't already running, 197 * so we can connect to it. 198 */ 199 system("/sbin/hammer2 -q service"); 200 201 /* 202 * Connect us to the service but leave the rest to the kernel. 203 * If the connection is lost during the mount 204 */ 205 if ((fd = socket(AF_INET, SOCK_STREAM, 0)) < 0) { 206 perror("socket"); 207 return(-1); 208 } 209 bzero(&lsin, sizeof(lsin)); 210 lsin.sin_family = AF_INET; 211 lsin.sin_addr.s_addr = htonl(INADDR_LOOPBACK); 212 lsin.sin_port = htons(DMSG_LISTEN_PORT); 213 214 if (connect(fd, (struct sockaddr *)&lsin, sizeof(lsin)) < 0) { 215 close(fd); 216 fprintf(stderr, "mount_hammer2: unable to connect to " 217 "cluster controller\n"); 218 return(-1); 219 } 220 221 return(fd); 222 } 223 224 static 225 void 226 usage(const char *ctl, ...) 227 { 228 va_list va; 229 230 va_start(va, ctl); 231 fprintf(stderr, "hammer2_mount: "); 232 vfprintf(stderr, ctl, va); 233 va_end(va); 234 fprintf(stderr, "\n"); 235 fprintf(stderr, " hammer2_mount -u [-o opts] mountpt\n"); 236 fprintf(stderr, " hammer2_mount [-o opts] dev@LABEL mountpt\n"); 237 fprintf(stderr, "\n"); 238 fprintf(stderr, "options:\n" 239 " <standard_mount_opts>\n" 240 " local\t- disable PFS clustering for whole device\n" 241 ); 242 exit(1); 243 } 244