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