1 /* 2 * Copyright (c) 2007 The DragonFly Project. All rights reserved. 3 * 4 * This code is derived from software contributed to The DragonFly Project 5 * by Matthew Dillon <dillon@backplane.com> 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 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 15 * the documentation and/or other materials provided with the 16 * distribution. 17 * 3. Neither the name of The DragonFly Project nor the names of its 18 * contributors may be used to endorse or promote products derived 19 * from this software without specific, prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 22 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 23 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS 24 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE 25 * COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, 26 * INCIDENTAL, SPECIAL, EXEMPLARY OR CONSEQUENTIAL DAMAGES (INCLUDING, 27 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 28 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED 29 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 30 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT 31 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 32 * SUCH DAMAGE. 33 */ 34 35 #include <sys/types.h> 36 #include <sys/stat.h> 37 #include <sys/syslimits.h> 38 #include <vfs/hammer/hammer_mount.h> 39 #include <vfs/hammer/hammer_disk.h> 40 41 #include <stdio.h> 42 #include <stdlib.h> 43 #include <stdarg.h> 44 #include <stddef.h> 45 #include <unistd.h> 46 #include <string.h> 47 #include <fcntl.h> 48 #include <err.h> 49 #include <mntopts.h> 50 51 static void test_master_id(int master_id); 52 static void extract_volumes(struct hammer_mount_info *info, char **av, int ac); 53 static void free_volumes(struct hammer_mount_info *info); 54 static void test_volumes(struct hammer_mount_info *info); 55 static void usage(void); 56 57 #define hwarnx(format, args...) warnx("WARNING: "format,## args) 58 59 #define MOPT_HAMMEROPTS \ 60 { "history", 1, HMNT_NOHISTORY, 1 }, \ 61 { "master=", 0, HMNT_MASTERID, 1 }, \ 62 { "mirror", 1, HMNT_NOMIRROR, 1 } 63 64 static struct mntopt mopts[] = { MOPT_STDOPTS, MOPT_HAMMEROPTS, 65 MOPT_UPDATE, MOPT_NULL }; 66 67 int 68 main(int ac, char **av) 69 { 70 struct hammer_mount_info info; 71 struct vfsconf vfc; 72 int mount_flags = 0; 73 int init_flags = 0; 74 int error; 75 int ch; 76 char *mountpt; 77 char *ptr; 78 79 bzero(&info, sizeof(info)); 80 81 while ((ch = getopt(ac, av, "o:T:u")) != -1) { 82 switch(ch) { 83 case 'T': 84 info.asof = strtoull(optarg, NULL, 0); 85 break; 86 case 'o': 87 getmntopts(optarg, mopts, &mount_flags, &info.hflags); 88 89 /* 90 * Handle extended flags with parameters. 91 */ 92 if (info.hflags & HMNT_MASTERID) { 93 ptr = strstr(optarg, "master="); 94 if (ptr) { 95 info.master_id = strtol(ptr + 7, NULL, 0); 96 test_master_id(info.master_id); 97 } 98 } 99 if (info.hflags & HMNT_NOMIRROR) { 100 ptr = strstr(optarg, "nomirror"); 101 if (ptr) 102 info.master_id = -1; 103 } 104 break; 105 case 'u': 106 init_flags |= MNT_UPDATE; 107 break; 108 default: 109 usage(); 110 /* not reached */ 111 } 112 } 113 ac -= optind; 114 av += optind; 115 mount_flags |= init_flags; 116 117 /* 118 * Only the mount point need be specified in update mode. 119 */ 120 if (init_flags & MNT_UPDATE) { 121 if (ac != 1) { 122 usage(); 123 /* not reached */ 124 } 125 mountpt = av[0]; 126 if (mount(vfc.vfc_name, mountpt, mount_flags, &info)) 127 err(1, "mountpoint %s", mountpt); 128 exit(0); 129 } 130 131 if (ac < 2) { 132 usage(); 133 /* not reached */ 134 } 135 136 /* 137 * Mount arguments: vol [vol...] mountpt 138 */ 139 extract_volumes(&info, av, ac - 1); 140 mountpt = av[ac - 1]; 141 142 /* 143 * Load the hammer module if necessary (this bit stolen from 144 * mount_null). 145 */ 146 error = getvfsbyname("hammer", &vfc); 147 if (error && vfsisloadable("hammer")) { 148 if (vfsload("hammer") != 0) 149 err(1, "vfsload(hammer)"); 150 endvfsent(); 151 error = getvfsbyname("hammer", &vfc); 152 } 153 if (error) 154 errx(1, "hammer filesystem is not available"); 155 156 if (mount(vfc.vfc_name, mountpt, mount_flags, &info)) { 157 perror("mount"); 158 test_volumes(&info); 159 exit(1); 160 } 161 free_volumes(&info); 162 163 return(0); 164 } 165 166 static void test_master_id(int master_id) 167 { 168 switch (master_id) { 169 case 0: 170 hwarnx("A master id of 0 is the default, " 171 "explicit settings should use 1-15"); 172 break; 173 case -1: 174 hwarnx("A master id of -1 is nomirror mode, " 175 "equivalent to -o nomirror option"); 176 break; 177 case 1 ... 15: /* gcc */ 178 /* Expected values via -o master= option */ 179 break; 180 default: 181 /* This will eventually fail in hammer_vfs_mount() */ 182 hwarnx("A master id of %d is not supported", master_id); 183 break; 184 } 185 } 186 187 /* 188 * Extract a volume list 189 */ 190 static 191 void 192 extract_volumes(struct hammer_mount_info *info, char **av, int ac) 193 { 194 int idx = 0; 195 int arymax = 32; 196 char **ary = malloc(sizeof(char *) * arymax); 197 char *ptr; 198 char *next; 199 char *orig; 200 201 while (ac) { 202 if (idx == arymax) { 203 arymax += 32; 204 ary = realloc(ary, sizeof(char *) * arymax); 205 } 206 if (strchr(*av, ':') == NULL) { 207 ary[idx++] = strdup(*av); 208 } else { 209 orig = next = strdup(*av); 210 while ((ptr = next) != NULL) { 211 if (idx == arymax) { 212 arymax += 32; 213 ary = realloc(ary, sizeof(char *) * 214 arymax); 215 } 216 if ((next = strchr(ptr, ':')) != NULL) 217 *next++ = 0; 218 ary[idx++] = strdup(ptr); 219 } 220 free(orig); 221 } 222 --ac; 223 ++av; 224 } 225 info->nvolumes = idx; 226 info->volumes = ary; 227 } 228 229 static 230 void 231 free_volumes(struct hammer_mount_info *info) 232 { 233 int i; 234 235 for (i = 0; i < info->nvolumes; i++) 236 free(info->volumes[i]); 237 free(info->volumes); 238 } 239 240 /* 241 * This function is based on __verify_volume() in sbin/hammer/ondisk.c. 242 */ 243 static 244 void 245 __verify_volume(hammer_volume_ondisk_t ondisk, 246 const char *vol_name, int vol_count) 247 { 248 if (ondisk->vol_signature != HAMMER_FSBUF_VOLUME) { 249 errx(1, "%s: Invalid volume signature %016jx", 250 vol_name, ondisk->vol_signature); 251 } 252 if (ondisk->vol_count != vol_count) { 253 errx(1, "%s: Invalid volume count %d, " 254 "volume header says %d volumes", 255 vol_name, vol_count, ondisk->vol_count); 256 } 257 if (ondisk->vol_rootvol != HAMMER_ROOT_VOLNO) { 258 errx(1, "%s: Invalid root volume# %d", 259 vol_name, ondisk->vol_rootvol); 260 } 261 } 262 263 /* 264 * This function prints a possible reason that mount(2) failed, 265 * which isn't really necessary as the real reason is likely to 266 * be in dmesg anyway, but was originally added by 1a607e3e. 267 */ 268 static 269 void 270 test_volumes(struct hammer_mount_info *info) 271 { 272 int i, fd; 273 char buf[2048]; /* sizeof(*ondisk) is 1928 */ 274 hammer_volume_ondisk_t ondisk = (hammer_volume_ondisk_t)buf; 275 276 for (i = 0; i < info->nvolumes; i++) { 277 const char *vol = info->volumes[i]; 278 fd = open(vol, O_RDONLY); 279 if (fd < 0) 280 err(1, "%s: Failed to open", vol); 281 282 bzero(buf, sizeof(buf)); 283 if (pread(fd, buf, sizeof(buf), 0) != sizeof(buf)) 284 err(1, "%s: Failed to read volume header", vol); 285 286 __verify_volume(ondisk, vol, info->nvolumes); 287 close(fd); 288 } 289 } 290 291 static 292 void 293 usage(void) 294 { 295 fprintf(stderr, "usage: mount_hammer [-o options] [-T transaction-id] " 296 "special ... node\n"); 297 fprintf(stderr, " mount_hammer [-o options] [-T transaction-id] " 298 "special[:special]* node\n"); 299 fprintf(stderr, " mount_hammer -u [-o options] node\n"); 300 exit(1); 301 } 302