sbin/hammer/cmd_pfs.c

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