1 /* 2 * Copyright (c) 2008 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 * $DragonFly: src/sbin/hammer/cmd_pseudofs.c,v 1.12 2008/10/08 21:01:54 thomas Exp $ 35 */ 36 37 #include <libgen.h> 38 39 #include "hammer.h" 40 41 static int scanpfsid(struct hammer_ioc_pseudofs_rw *pfs, const char *path); 42 static void parse_pfsd_options(char **av, int ac, hammer_pseudofs_data_t pfsd); 43 static void init_pfsd(hammer_pseudofs_data_t pfsd, int is_slave); 44 static void pseudofs_usage(int code); 45 static int timetosecs(char *str); 46 47 /* 48 * Return a directory that contains path. 49 * If '/' is not found in the path then '.' is returned. 50 * A caller need to free the returned pointer. 51 */ 52 static char* 53 getdir(const char *path) 54 { 55 char *dirpath; 56 57 dirpath = strdup(path); 58 if (strrchr(dirpath, '/')) { 59 *strrchr(dirpath, '/') = 0; 60 if (strlen(dirpath) == 0) { 61 free(dirpath); 62 dirpath = strdup("/"); 63 } 64 } else { 65 free(dirpath); 66 dirpath = strdup("."); 67 } 68 69 return(dirpath); 70 } 71 72 /* 73 * Calculate the pfs_id given a path to a directory or a @@PFS or @@%llx:%d 74 * softlink. 75 */ 76 int 77 getpfs(struct hammer_ioc_pseudofs_rw *pfs, char *path) 78 { 79 int fd; 80 char *p; 81 82 bzero(pfs, sizeof(*pfs)); 83 pfs->ondisk = malloc(sizeof(*pfs->ondisk)); 84 bzero(pfs->ondisk, sizeof(*pfs->ondisk)); 85 pfs->bytes = sizeof(*pfs->ondisk); 86 87 /* 88 * Trailing '/' must be removed so that upon pfs-destroy 89 * the symlink can be deleted without problems. 90 * Root directory (/) must be excluded from this. 91 */ 92 p = path + (int)strlen(path) - 1; 93 assert(p >= path); 94 while (p != path && *p == '/') 95 *p-- = 0; 96 97 fd = scanpfsid(pfs, path); 98 if (fd < 0) { 99 /* 100 * Once it comes here the hammer command may fail even if 101 * this function returns valid file descriptor. 102 */ 103 fd = open(path, O_RDONLY); 104 if (fd >= 0) { 105 pfs->pfs_id = -1; 106 ioctl(fd, HAMMERIOC_GET_PSEUDOFS, pfs); 107 if (pfs->pfs_id == -1) { 108 close(fd); 109 fd = -1; 110 } 111 } 112 } 113 114 if (fd < 0) { 115 fprintf(stderr, "Cannot access PFS %s: %s\n", 116 path, strerror(errno)); 117 exit(1); 118 } 119 120 /* 121 * pfs.pfs_id should have been set to non -1. In this case fd 122 * could be any fd of HAMMER inodes since HAMMERIOC_GET_PSEUDOFS 123 * doesn't depend on inode attributes if it's set to a valid id. 124 */ 125 if (ioctl(fd, HAMMERIOC_GET_PSEUDOFS, pfs) < 0) { 126 fprintf(stderr, "Cannot access PFS %s: %s\n", 127 path, strerror(errno)); 128 exit(1); 129 } 130 return(fd); 131 } 132 133 /* 134 * Extract the PFS id from path. Return a file descriptor of 135 * the parent directory which is expected to be located under 136 * the root filesystem (not another PFS). 137 */ 138 static int 139 scanpfsid(struct hammer_ioc_pseudofs_rw *pfs, const char *path) 140 { 141 int fd; 142 int n; 143 const char *p; 144 char *dirpath; 145 char buf[64]; 146 uintmax_t dummy_tid; 147 struct stat st; 148 149 if (stat(path, &st)) { 150 /* possibly slave PFS */ 151 } else if (S_ISDIR(st.st_mode)) { 152 /* possibly master or slave PFS */ 153 } else { 154 return -1; /* neither */ 155 } 156 157 /* 158 * If the path is a link read the link. 159 */ 160 if (lstat(path, &st) == 0 && S_ISLNK(st.st_mode)) { 161 n = readlink(path, buf, sizeof(buf) - 1); 162 if (n < 0) 163 n = 0; 164 buf[n] = 0; 165 p = buf; 166 } else { 167 p = path; 168 } 169 170 /* 171 * The symlink created by pfs-master|slave is just a symlink. 172 * One could happen to remove a symlink and relink PFS as 173 * # ln -s ./@@-1:00001 ./link 174 * which results PFS having something extra before @@. 175 * One could also directly use the PFS and results the same. 176 * Get rid of it before we extract the PFS id. 177 */ 178 if (strchr(p, '/')) { 179 p = basename(p); 180 if (p == NULL) 181 err(1, "basename"); 182 } 183 184 /* 185 * Extract the PFS from the link. HAMMER will automatically 186 * convert @@PFS%05d links so if actually see one in that 187 * form the target PFS may not exist or may be corrupt. But 188 * we can extract the PFS id anyway. 189 */ 190 dirpath = getdir(path); 191 if (sscanf(p, "@@PFS%d", &pfs->pfs_id) == 1) { 192 fd = open(dirpath, O_RDONLY); 193 } else if (sscanf(p, "@@%jx:%d", &dummy_tid, &pfs->pfs_id) == 2) { 194 fd = open(dirpath, O_RDONLY); 195 } else { 196 fd = -1; /* Failed to scan PFS id */ 197 } 198 free(dirpath); 199 return(fd); 200 } 201 202 void 203 relpfs(int fd, struct hammer_ioc_pseudofs_rw *pfs) 204 { 205 if (fd >= 0) 206 close(fd); 207 if (pfs->ondisk) { 208 free(pfs->ondisk); 209 pfs->ondisk = NULL; 210 } 211 } 212 213 void 214 hammer_cmd_pseudofs_status(char **av, int ac) 215 { 216 struct hammer_ioc_pseudofs_rw pfs; 217 int i; 218 int fd; 219 220 if (ac == 0) 221 pseudofs_usage(1); 222 223 for (i = 0; i < ac; ++i) { 224 fd = getpfs(&pfs, av[i]); 225 printf("%s\t", av[i]); 226 if (fd < 0 || ioctl(fd, HAMMERIOC_GET_PSEUDOFS, &pfs) < 0) { 227 printf("Invalid PFS path %s\n", av[i]); 228 } else { 229 printf("PFS #%d {\n", pfs.pfs_id); 230 dump_pfsd(pfs.ondisk, fd); 231 printf("}\n"); 232 } 233 if (fd >= 0) 234 close(fd); 235 if (pfs.ondisk) 236 free(pfs.ondisk); 237 relpfs(fd, &pfs); 238 } 239 } 240 241 void 242 hammer_cmd_pseudofs_create(char **av, int ac, int is_slave) 243 { 244 struct hammer_ioc_pseudofs_rw pfs; 245 struct hammer_pseudofs_data pfsd; 246 struct stat st; 247 const char *path; 248 char *dirpath; 249 char *linkpath; 250 int pfs_id; 251 int fd; 252 int error; 253 254 if (ac == 0) 255 pseudofs_usage(1); 256 path = av[0]; 257 if (lstat(path, &st) == 0) { 258 fprintf(stderr, "Cannot create %s, file exists!\n", path); 259 exit(1); 260 } 261 262 /* 263 * Figure out the directory prefix, taking care of degenerate 264 * cases. 265 */ 266 dirpath = getdir(path); 267 fd = open(dirpath, O_RDONLY); 268 if (fd < 0) { 269 fprintf(stderr, "Cannot open directory %s\n", dirpath); 270 exit(1); 271 } 272 273 /* 274 * Avoid foot-shooting. Don't let the user create a PFS 275 * softlink via a PFS. PFS softlinks may only be accessed 276 * via the master filesystem. Checking it here ensures 277 * other PFS commands access PFS under the master filesystem. 278 */ 279 bzero(&pfs, sizeof(pfs)); 280 bzero(&pfsd, sizeof(pfsd)); 281 pfs.pfs_id = -1; 282 pfs.ondisk = &pfsd; 283 pfs.bytes = sizeof(pfsd); 284 285 ioctl(fd, HAMMERIOC_GET_PSEUDOFS, &pfs); 286 if (pfs.pfs_id != HAMMER_ROOT_PFSID) { 287 fprintf(stderr, 288 "You are attempting to access a PFS softlink " 289 "from a PFS. It may not represent the PFS\n" 290 "on the main filesystem mount that you " 291 "expect! You may only access PFS softlinks\n" 292 "via the main filesystem mount!\n"); 293 exit(1); 294 } 295 296 error = 0; 297 for (pfs_id = 0; pfs_id < HAMMER_MAX_PFS; ++pfs_id) { 298 bzero(&pfs, sizeof(pfs)); 299 bzero(&pfsd, sizeof(pfsd)); 300 pfs.pfs_id = pfs_id; 301 pfs.ondisk = &pfsd; 302 pfs.bytes = sizeof(pfsd); 303 pfs.version = HAMMER_IOC_PSEUDOFS_VERSION; 304 if (ioctl(fd, HAMMERIOC_GET_PSEUDOFS, &pfs) < 0) { 305 error = errno; 306 break; 307 } 308 } 309 if (pfs_id == HAMMER_MAX_PFS) { 310 fprintf(stderr, "Cannot create %s, all PFSs in use\n", path); 311 exit(1); 312 } else if (pfs_id == HAMMER_ROOT_PFSID) { 313 fprintf(stderr, "Fatal error: PFS#%d must exist\n", 314 HAMMER_ROOT_PFSID); 315 exit(1); 316 } 317 318 if (error != ENOENT) { 319 fprintf(stderr, "Cannot create %s, got %s during scan\n", 320 path, strerror(error)); 321 exit(1); 322 } 323 324 /* 325 * Create the new PFS 326 */ 327 printf("Creating PFS #%d\t", pfs_id); 328 init_pfsd(&pfsd, is_slave); 329 pfs.pfs_id = pfs_id; 330 pfs.ondisk = &pfsd; 331 pfs.bytes = sizeof(pfsd); 332 pfs.version = HAMMER_IOC_PSEUDOFS_VERSION; 333 334 if (ioctl(fd, HAMMERIOC_SET_PSEUDOFS, &pfs) < 0) { 335 printf("failed: %s\n", strerror(errno)); 336 } else { 337 /* special symlink, must be exactly 10 characters */ 338 asprintf(&linkpath, "@@PFS%05d", pfs_id); 339 if (symlink(linkpath, path) < 0) { 340 printf("failed: cannot create symlink: %s\n", 341 strerror(errno)); 342 } else { 343 printf("succeeded!\n"); 344 hammer_cmd_pseudofs_update(av, ac); 345 } 346 } 347 free(dirpath); 348 close(fd); 349 } 350 351 void 352 hammer_cmd_pseudofs_destroy(char **av, int ac) 353 { 354 struct hammer_ioc_pseudofs_rw pfs; 355 struct hammer_pseudofs_data pfsd; 356 struct stat st; 357 int fd; 358 int i; 359 360 if (ac == 0) 361 pseudofs_usage(1); 362 fd = getpfs(&pfs, av[0]); 363 364 if (pfs.pfs_id == HAMMER_ROOT_PFSID) { 365 fprintf(stderr, "You cannot destroy PFS#0\n"); 366 exit(1); 367 } 368 printf("You have requested that PFS#%d (%s) be destroyed\n", 369 pfs.pfs_id, pfs.ondisk->label); 370 printf("This will irrevocably destroy all data on this PFS!!!!!\n"); 371 printf("Do you really want to do this? "); 372 fflush(stdout); 373 if (getyn() == 0) { 374 fprintf(stderr, "No action taken on PFS#%d\n", pfs.pfs_id); 375 exit(1); 376 } 377 378 if (hammer_is_pfs_master(pfs.ondisk)) { 379 printf("This PFS is currently setup as a MASTER!\n"); 380 printf("Are you absolutely sure you want to destroy it? "); 381 fflush(stdout); 382 if (getyn() == 0) { 383 fprintf(stderr, "No action taken on PFS#%d\n", 384 pfs.pfs_id); 385 exit(1); 386 } 387 } 388 389 printf("Destroying PFS #%d (%s) in ", pfs.pfs_id, pfs.ondisk->label); 390 for (i = 5; i; --i) { 391 printf(" %d", i); 392 fflush(stdout); 393 sleep(1); 394 } 395 printf(".. starting destruction pass\n"); 396 fflush(stdout); 397 398 /* 399 * Save the original PFS data so we can restore if on failure. 400 * It fails to destroy, for example, if the PFS is still mounted. 401 */ 402 bcopy(pfs.ondisk, &pfsd, sizeof(pfsd)); 403 404 /* 405 * Set the sync_beg_tid and sync_end_tid's to 1, once we start the 406 * RMR the PFS is basically destroyed even if someone ^C's it. 407 */ 408 pfs.ondisk->mirror_flags |= HAMMER_PFSD_SLAVE; 409 pfs.ondisk->reserved01 = -1; 410 pfs.ondisk->sync_beg_tid = 1; 411 pfs.ondisk->sync_end_tid = 1; 412 413 if (ioctl(fd, HAMMERIOC_SET_PSEUDOFS, &pfs) < 0) { 414 fprintf(stderr, "Unable to update the PFS configuration: %s\n", 415 strerror(errno)); 416 exit(1); 417 } 418 419 /* 420 * Ok, do it. Remove the softlink on success. 421 */ 422 if (ioctl(fd, HAMMERIOC_RMR_PSEUDOFS, &pfs) == 0) { 423 printf("pfs-destroy of PFS#%d succeeded!\n", pfs.pfs_id); 424 if (lstat(av[0], &st) == 0 && S_ISLNK(st.st_mode)) { 425 if (remove(av[0]) < 0) { 426 fprintf(stderr, "Unable to remove softlink: %s " 427 "(but the PFS has been destroyed)\n", 428 av[0]); 429 /* exit status 0 anyway */ 430 } 431 } 432 } else { 433 printf("pfs-destroy of PFS#%d failed: %s\n", 434 pfs.pfs_id, strerror(errno)); 435 /* 436 * Restore the pfsd as we don't want to keep it downgraded. 437 * This simply restores ondisk PFS with the original data 438 * without creating a new root inode as it already exists. 439 */ 440 bcopy(&pfsd, pfs.ondisk, sizeof(pfsd)); 441 if (ioctl(fd, HAMMERIOC_SET_PSEUDOFS, &pfs) < 0) { 442 printf("Failed to restore the original PFS#%d data\n", 443 pfs.pfs_id); 444 exit(1); 445 } 446 } 447 relpfs(fd, &pfs); 448 } 449 450 void 451 hammer_cmd_pseudofs_upgrade(char **av, int ac) 452 { 453 struct hammer_ioc_pseudofs_rw pfs; 454 int fd; 455 456 if (ac == 0) 457 pseudofs_usage(1); 458 fd = getpfs(&pfs, av[0]); 459 460 if (pfs.pfs_id == HAMMER_ROOT_PFSID) { 461 fprintf(stderr, "You cannot upgrade PFS#0" 462 " (It should already be a master)\n"); 463 exit(1); 464 } else if (hammer_is_pfs_master(pfs.ondisk)) { 465 printf("It is already a master\n"); 466 exit(1); 467 } 468 469 if (ioctl(fd, HAMMERIOC_UPG_PSEUDOFS, &pfs) == 0) { 470 printf("pfs-upgrade of PFS#%d (%s) succeeded\n", 471 pfs.pfs_id, pfs.ondisk->label); 472 } else { 473 fprintf(stderr, "pfs-upgrade of PFS#%d (%s) failed: %s\n", 474 pfs.pfs_id, pfs.ondisk->label, strerror(errno)); 475 } 476 relpfs(fd, &pfs); 477 } 478 479 void 480 hammer_cmd_pseudofs_downgrade(char **av, int ac) 481 { 482 struct hammer_ioc_pseudofs_rw pfs; 483 int fd; 484 485 if (ac == 0) 486 pseudofs_usage(1); 487 fd = getpfs(&pfs, av[0]); 488 489 if (pfs.pfs_id == HAMMER_ROOT_PFSID) { 490 fprintf(stderr, "You cannot downgrade PFS#0\n"); 491 exit(1); 492 } else if (hammer_is_pfs_slave(pfs.ondisk)) { 493 printf("It is already a slave\n"); 494 exit(1); 495 } 496 497 if (ioctl(fd, HAMMERIOC_DGD_PSEUDOFS, &pfs) == 0) { 498 printf("pfs-downgrade of PFS#%d (%s) succeeded\n", 499 pfs.pfs_id, pfs.ondisk->label); 500 } else { 501 fprintf(stderr, "pfs-downgrade of PFS#%d (%s) failed: %s\n", 502 pfs.pfs_id, pfs.ondisk->label, strerror(errno)); 503 } 504 relpfs(fd, &pfs); 505 } 506 507 void 508 hammer_cmd_pseudofs_update(char **av, int ac) 509 { 510 struct hammer_ioc_pseudofs_rw pfs; 511 int fd; 512 513 if (ac == 0) 514 pseudofs_usage(1); 515 fd = getpfs(&pfs, av[0]); 516 517 printf("%s\n", av[0]); 518 fflush(stdout); 519 520 if (ioctl(fd, HAMMERIOC_GET_PSEUDOFS, &pfs) == 0) { 521 parse_pfsd_options(av + 1, ac - 1, pfs.ondisk); 522 if (hammer_is_pfs_slave(pfs.ondisk) && 523 pfs.pfs_id == HAMMER_ROOT_PFSID) { 524 printf("The real mount point cannot be made a PFS " 525 "slave, only PFS sub-directories can be made " 526 "slaves\n"); 527 exit(1); 528 } 529 pfs.bytes = sizeof(*pfs.ondisk); 530 if (ioctl(fd, HAMMERIOC_SET_PSEUDOFS, &pfs) == 0) { 531 if (ioctl(fd, HAMMERIOC_GET_PSEUDOFS, &pfs) == 0) { 532 dump_pfsd(pfs.ondisk, fd); 533 } else { 534 printf("Unable to retrieve PFS configuration " 535 "after successful update: %s\n", 536 strerror(errno)); 537 exit(1); 538 } 539 } else { 540 printf("Unable to adjust PFS configuration: %s\n", 541 strerror(errno)); 542 exit(1); 543 } 544 } 545 relpfs(fd, &pfs); 546 } 547 548 static void 549 init_pfsd(hammer_pseudofs_data_t pfsd, int is_slave) 550 { 551 uint32_t status; 552 553 bzero(pfsd, sizeof(*pfsd)); 554 pfsd->sync_beg_tid = 1; 555 pfsd->sync_end_tid = 1; 556 pfsd->sync_beg_ts = 0; 557 pfsd->sync_end_ts = 0; 558 uuid_create(&pfsd->shared_uuid, &status); 559 uuid_create(&pfsd->unique_uuid, &status); 560 if (is_slave) 561 pfsd->mirror_flags |= HAMMER_PFSD_SLAVE; 562 } 563 564 void 565 dump_pfsd(hammer_pseudofs_data_t pfsd, int fd) 566 { 567 struct hammer_ioc_version version; 568 uint32_t status; 569 char *str = NULL; 570 571 printf(" sync-beg-tid=0x%016jx\n", (uintmax_t)pfsd->sync_beg_tid); 572 printf(" sync-end-tid=0x%016jx\n", (uintmax_t)pfsd->sync_end_tid); 573 uuid_to_string(&pfsd->shared_uuid, &str, &status); 574 printf(" shared-uuid=%s\n", str); 575 free(str); 576 uuid_to_string(&pfsd->unique_uuid, &str, &status); 577 printf(" unique-uuid=%s\n", str); 578 free(str); 579 printf(" label=\"%s\"\n", pfsd->label); 580 if (pfsd->snapshots[0]) 581 printf(" snapshots=\"%s\"\n", pfsd->snapshots); 582 if (pfsd->prune_min < (60 * 60 * 24)) { 583 printf(" prune-min=%02d:%02d:%02d\n", 584 pfsd->prune_min / 60 / 60 % 24, 585 pfsd->prune_min / 60 % 60, 586 pfsd->prune_min % 60); 587 } else if (pfsd->prune_min % (60 * 60 * 24)) { 588 printf(" prune-min=%dd/%02d:%02d:%02d\n", 589 pfsd->prune_min / 60 / 60 / 24, 590 pfsd->prune_min / 60 / 60 % 24, 591 pfsd->prune_min / 60 % 60, 592 pfsd->prune_min % 60); 593 } else { 594 printf(" prune-min=%dd\n", pfsd->prune_min / 60 / 60 / 24); 595 } 596 597 if (hammer_is_pfs_slave(pfsd)) { 598 printf(" operating as a SLAVE\n"); 599 } else { 600 printf(" operating as a MASTER\n"); 601 } 602 603 /* 604 * Snapshots directory cannot be shown when there is no fd since 605 * hammer version can't be retrieved. mirror-dump passes -1 because 606 * its input came from mirror-read output thus no path is available 607 * to open(2). 608 */ 609 if (fd >= 0 && pfsd->snapshots[0] == 0) { 610 bzero(&version, sizeof(version)); 611 if (ioctl(fd, HAMMERIOC_GET_VERSION, &version) < 0) 612 return; 613 if (version.cur_version < 3) { 614 if (hammer_is_pfs_slave(pfsd)) { 615 printf(" snapshots directory not set for " 616 "slave\n"); 617 } else { 618 printf(" snapshots directory for master " 619 "defaults to <pfs>/snapshots\n"); 620 } 621 } else { 622 printf(" snapshots directory defaults to " 623 "/var/hammer/<pfs>\n"); 624 } 625 } 626 } 627 628 static void 629 parse_pfsd_options(char **av, int ac, hammer_pseudofs_data_t pfsd) 630 { 631 char *cmd; 632 char *ptr; 633 int len; 634 uint32_t status; 635 636 while (ac) { 637 cmd = *av; 638 if ((ptr = strchr(cmd, '=')) != NULL) 639 *ptr++ = 0; 640 641 /* 642 * Basic assignment value test 643 */ 644 if (ptr == NULL) { 645 fprintf(stderr, 646 "option %s requires an assignment\n", 647 cmd); 648 exit(1); 649 } 650 651 status = uuid_s_ok; 652 if (strcmp(cmd, "sync-beg-tid") == 0) { 653 pfsd->sync_beg_tid = strtoull(ptr, NULL, 16); 654 } else if (strcmp(cmd, "sync-end-tid") == 0) { 655 pfsd->sync_end_tid = strtoull(ptr, NULL, 16); 656 } else if (strcmp(cmd, "shared-uuid") == 0) { 657 uuid_from_string(ptr, &pfsd->shared_uuid, &status); 658 } else if (strcmp(cmd, "unique-uuid") == 0) { 659 uuid_from_string(ptr, &pfsd->unique_uuid, &status); 660 } else if (strcmp(cmd, "label") == 0) { 661 len = strlen(ptr); 662 if (ptr[0] == '"' && ptr[len-1] == '"') { 663 ptr[len-1] = 0; 664 ++ptr; 665 } else if (ptr[0] == '"') { 666 fprintf(stderr, 667 "option %s: malformed string\n", 668 cmd); 669 exit(1); 670 } 671 snprintf(pfsd->label, sizeof(pfsd->label), "%s", ptr); 672 } else if (strcmp(cmd, "snapshots") == 0) { 673 len = strlen(ptr); 674 if (ptr[0] != '/') { 675 fprintf(stderr, 676 "option %s: '%s' must be an " 677 "absolute path\n", cmd, ptr); 678 if (ptr[0] == 0) { 679 fprintf(stderr, 680 "use 'snapshots-clear' " 681 "to unset snapshots dir\n"); 682 } 683 exit(1); 684 } 685 if (len >= (int)sizeof(pfsd->snapshots)) { 686 fprintf(stderr, 687 "option %s: path too long, %d " 688 "character limit\n", cmd, len); 689 exit(1); 690 } 691 snprintf(pfsd->snapshots, sizeof(pfsd->snapshots), 692 "%s", ptr); 693 } else if (strcmp(cmd, "snapshots-clear") == 0) { 694 pfsd->snapshots[0] = 0; 695 } else if (strcmp(cmd, "prune-min") == 0) { 696 pfsd->prune_min = timetosecs(ptr); 697 if (pfsd->prune_min < 0) { 698 fprintf(stderr, 699 "option %s: illegal time spec, " 700 "use Nd or [Nd/]hh[:mm[:ss]]\n", ptr); 701 exit(1); 702 } 703 } else { 704 fprintf(stderr, "invalid option: %s\n", cmd); 705 exit(1); 706 } 707 if (status != uuid_s_ok) { 708 fprintf(stderr, "option %s: error parsing uuid %s\n", 709 cmd, ptr); 710 exit(1); 711 } 712 --ac; 713 ++av; 714 } 715 } 716 717 static 718 void 719 pseudofs_usage(int code) 720 { 721 fprintf(stderr, 722 "hammer pfs-status <dirpath> ...\n" 723 "hammer pfs-master <dirpath> [options]\n" 724 "hammer pfs-slave <dirpath> [options]\n" 725 "hammer pfs-update <dirpath> [options]\n" 726 "hammer pfs-upgrade <dirpath>\n" 727 "hammer pfs-downgrade <dirpath>\n" 728 "hammer pfs-destroy <dirpath>\n" 729 "\n" 730 "options:\n" 731 " sync-beg-tid=0x16llx\n" 732 " sync-end-tid=0x16llx\n" 733 " shared-uuid=0x16llx\n" 734 " unique-uuid=0x16llx\n" 735 " label=\"string\"\n" 736 " snapshots=\"/path\"\n" 737 " snapshots-clear\n" 738 " prune-min=Nd\n" 739 " prune-min=[Nd/]hh[:mm[:ss]]\n" 740 ); 741 exit(code); 742 } 743 744 /* 745 * Convert time in the form [Nd/]hh[:mm[:ss]] to seconds. 746 * 747 * Return -1 if a parse error occurs. 748 * Return 0x7FFFFFFF if the time exceeds the maximum allowed. 749 */ 750 static 751 int 752 timetosecs(char *str) 753 { 754 int days = 0; 755 int hrs = 0; 756 int mins = 0; 757 int secs = 0; 758 int n; 759 long long v; 760 char *ptr; 761 762 n = strtol(str, &ptr, 10); 763 if (n < 0) 764 return(-1); 765 if (*ptr == 'd') { 766 days = n; 767 ++ptr; 768 if (*ptr == '/') 769 n = strtol(ptr + 1, &ptr, 10); 770 else 771 n = 0; 772 } 773 if (n < 0) 774 return(-1); 775 hrs = n; 776 if (*ptr == ':') { 777 n = strtol(ptr + 1, &ptr, 10); 778 if (n < 0) 779 return(-1); 780 mins = n; 781 if (*ptr == ':') { 782 n = strtol(ptr + 1, &ptr, 10); 783 if (n < 0) 784 return(-1); 785 secs = n; 786 } 787 } 788 if (*ptr) 789 return(-1); 790 v = days * 24 * 60 * 60 + hrs * 60 * 60 + mins * 60 + secs; 791 if (v > 0x7FFFFFFF) 792 v = 0x7FFFFFFF; 793 return((int)v); 794 } 795