sbin/hammer/cmd_pseudofs.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 "hammer.h"
  38
  39 static void parse_pfsd_options(char **av, int ac, hammer_pseudofs_data_t pfsd);
  40 static void init_pfsd(hammer_pseudofs_data_t pfsd, int is_slave);
  41 static void dump_pfsd(hammer_pseudofs_data_t pfsd);
  42 static void pseudofs_usage(int code);
  43 static int getyn(void);
  44 static int timetosecs(char *str);
  45
  46 /*
  47  * Calculate the pfs_id given a path to a directory or a @@PFS or @@%llx:%d
  48  * softlink.
  49  */
  50 int
  51 getpfs(struct hammer_ioc_pseudofs_rw *pfs, const char *path)
  52 {
  53         uintmax_t dummy_tid;
  54         struct stat st;
  55         char *dirpath;
  56         char buf[64];
  57         int fd;
  58         int n;
  59
  60         bzero(pfs, sizeof(*pfs));
  61         pfs->ondisk = malloc(sizeof(*pfs->ondisk));
  62         bzero(pfs->ondisk, sizeof(*pfs->ondisk));
  63         pfs->bytes = sizeof(*pfs->ondisk);
  64
  65         /*
  66          * Calculate the directory containing the softlink
  67          */
  68         dirpath = strdup(path);
  69         if (strrchr(dirpath, '/')) {
  70                 *strrchr(dirpath, '/') = 0;
  71                 if (strlen(dirpath) == 0) {
  72                         free(dirpath);
  73                         dirpath = strdup("/");
  74                 }
  75         } else {
  76                 free(dirpath);
  77                 dirpath = strdup(".");
  78         }
  79
  80         if (lstat(path, &st) == 0 && S_ISLNK(st.st_mode)) {
  81                 /*
  82                  * Avoid foot-shooting.  Don't let the user access a PFS
  83                  * softlink via a PFS.  PFS softlinks may only be accessed
  84                  * via the master filesystem.
  85                  */
  86                 fd = open(dirpath, O_RDONLY);
  87                 if (fd < 0)
  88                         goto done;
  89                 pfs->pfs_id = -1;
  90                 ioctl(fd, HAMMERIOC_GET_PSEUDOFS, pfs);
  91                 if (pfs->pfs_id != 0) {
  92                         fprintf(stderr,
  93                                 "You are attempting to access a PFS softlink "
  94                                 "from a PFS.  It may not represent the PFS\n"
  95                                 "on the main filesystem mount that you "
  96                                 "expect!  You may only access PFS softlinks\n"
  97                                 "via the main filesystem mount!\n");
  98                         exit(1);
  99                 }
 100                 close(fd);
 101
 102                 /*
 103                  * Extract the PFS from the link.  HAMMER will automatically
 104                  * convert @@PFS%05d links so if actually see one in that
 105                  * form the target PFS may not exist or may be corrupt.  But
 106                  * we can extract the PFS id anyway.
 107                  */
 108                 n = readlink(path, buf, sizeof(buf) - 1);
 109                 if (n < 0)
 110                         n = 0;
 111                 buf[n] = 0;
 112                 if (sscanf(buf, "@@PFS%d", &pfs->pfs_id) == 1) {
 113                         fd = open(dirpath, O_RDONLY);
 114                         goto done;
 115                 }
 116                 if (sscanf(buf, "@@%jx:%d", &dummy_tid, &pfs->pfs_id) == 2) {
 117                         fd = open(dirpath, O_RDONLY);
 118                         goto done;
 119                 }
 120         }
 121
 122         /*
 123          * Try to open the path and request the pfs_id that way.
 124          */
 125         fd = open(path, O_RDONLY);
 126         if (fd >= 0) {
 127                 pfs->pfs_id = -1;
 128                 ioctl(fd, HAMMERIOC_GET_PSEUDOFS, pfs);
 129                 if (pfs->pfs_id == -1) {
 130                         close(fd);
 131                         fd = -1;
 132                 }
 133         }
 134
 135         /*
 136          * Cleanup
 137          */
 138 done:
 139         if (fd < 0) {
 140                 fprintf(stderr, "Cannot access PFS %s: %s\n",
 141                         path, strerror(errno));
 142                 exit(1);
 143         }
 144         if (ioctl(fd, HAMMERIOC_GET_PSEUDOFS, pfs) < 0) {
 145                 fprintf(stderr, "Cannot access PFS %s: %s\n",
 146                         path, strerror(errno));
 147                 exit(1);
 148         }
 149         free(dirpath);
 150         return(fd);
 151 }
 152
 153 void
 154 relpfs(int fd, struct hammer_ioc_pseudofs_rw *pfs)
 155 {
 156         close(fd);
 157         if (pfs->ondisk) {
 158                 free(pfs->ondisk);
 159                 pfs->ondisk = NULL;
 160         }
 161 }
 162
 163 void
 164 hammer_cmd_pseudofs_status(char **av, int ac)
 165 {
 166         struct hammer_ioc_pseudofs_rw pfs;
 167         int i;
 168         int fd;
 169
 170         if (ac == 0)
 171                 pseudofs_usage(1);
 172
 173         for (i = 0; i < ac; ++i) {
 174                 printf("%s\t", av[i]);
 175                 fd = getpfs(&pfs, av[i]);
 176                 if (fd < 0 || ioctl(fd, HAMMERIOC_GET_PSEUDOFS, &pfs) < 0) {
 177                         printf("Not a HAMMER root\n");
 178                 } else {
 179                         printf("PFS #%d {\n", pfs.pfs_id);
 180                         dump_pfsd(pfs.ondisk);
 181                         printf("}\n");
 182                 }
 183                 if (fd >= 0)
 184                         close(fd);
 185                 if (pfs.ondisk)
 186                         free(pfs.ondisk);
 187         }
 188 }
 189
 190 void
 191 hammer_cmd_pseudofs_create(char **av, int ac, int is_slave)
 192 {
 193         struct hammer_ioc_pseudofs_rw pfs;
 194         struct hammer_pseudofs_data pfsd;
 195         struct stat st;
 196         const char *path;
 197         char *dirpath;
 198         char *linkpath;
 199         int pfs_id;
 200         int fd;
 201         int error;
 202
 203         if (ac == 0)
 204                 pseudofs_usage(1);
 205         path = av[0];
 206         if (lstat(path, &st) == 0) {
 207                 fprintf(stderr, "Cannot create %s, file exists!\n", path);
 208                 exit(1);
 209         }
 210
 211         /*
 212          * Figure out the directory prefix, taking care of degenerate
 213          * cases.
 214          */
 215         dirpath = strdup(path);
 216         if (strrchr(dirpath, '/') != NULL) {
 217                 *strrchr(dirpath, '/') = 0;
 218                 if (dirpath[0] == 0) {
 219                         free(dirpath);
 220                         dirpath = strdup("/");
 221                 }
 222         } else {
 223                 free(dirpath);
 224                 dirpath = strdup(".");
 225         }
 226         fd = open(dirpath, O_RDONLY);
 227         if (fd < 0) {
 228                 fprintf(stderr, "Cannot open directory %s\n", dirpath);
 229                 exit(1);
 230         }
 231
 232         error = 0;
 233         for (pfs_id = 0; pfs_id < HAMMER_MAX_PFS; ++pfs_id) {
 234                 bzero(&pfs, sizeof(pfs));
 235                 bzero(&pfsd, sizeof(pfsd));
 236                 pfs.pfs_id = pfs_id;
 237                 pfs.ondisk = &pfsd;
 238                 pfs.bytes = sizeof(pfsd);
 239                 pfs.version = HAMMER_IOC_PSEUDOFS_VERSION;
 240                 if (ioctl(fd, HAMMERIOC_GET_PSEUDOFS, &pfs) < 0) {
 241                         error = errno;
 242                         break;
 243                 }
 244         }
 245         if (pfs_id == HAMMER_MAX_PFS) {
 246                 fprintf(stderr, "Cannot create %s, all PFSs in use\n", path);
 247                 exit(1);
 248         }
 249         if (error != ENOENT) {
 250                 fprintf(stderr, "Cannot create %s, got %s during scan\n",
 251                         path, strerror(error));
 252                 exit(1);
 253         }
 254
 255         /*
 256          * Create the new PFS
 257          */
 258         printf("Creating PFS #%d\t", pfs_id);
 259         bzero(&pfsd, sizeof(pfsd));
 260         init_pfsd(&pfsd, is_slave);
 261         pfs.pfs_id = pfs_id;
 262         pfs.ondisk = &pfsd;
 263         pfs.bytes = sizeof(pfsd);
 264         pfs.version = HAMMER_IOC_PSEUDOFS_VERSION;
 265
 266         if (ioctl(fd, HAMMERIOC_SET_PSEUDOFS, &pfs) < 0) {
 267                 printf("failed: %s\n", strerror(errno));
 268         } else {
 269                 /* special symlink, must be exactly 10 characters */
 270                 asprintf(&linkpath, "@@PFS%05d", pfs_id);
 271                 if (symlink(linkpath, path) < 0) {
 272                         printf("failed: cannot create symlink: %s\n",
 273                                 strerror(errno));
 274                 } else {
 275                         printf("succeeded!\n");
 276                         hammer_cmd_pseudofs_update(av, ac);
 277                 }
 278         }
 279         close(fd);
 280 }
 281
 282 void
 283 hammer_cmd_pseudofs_destroy(char **av, int ac)
 284 {
 285         struct hammer_ioc_pseudofs_rw pfs;
 286         struct stat st;
 287         int fd;
 288         int i;
 289
 290         if (ac == 0)
 291                 pseudofs_usage(1);
 292         bzero(&pfs, sizeof(pfs));
 293         fd = getpfs(&pfs, av[0]);
 294
 295         if (pfs.pfs_id == 0) {
 296                 fprintf(stderr, "You cannot destroy PFS#0\n");
 297                 exit(1);
 298         }
 299         printf("You have requested that PFS#%d (%s) be destroyed\n",
 300                 pfs.pfs_id, pfs.ondisk->label);
 301         printf("This will irrevocably destroy all data on this PFS!!!!!\n");
 302         printf("Do you really want to do this? ");
 303         fflush(stdout);
 304         if (getyn() == 0) {
 305                 fprintf(stderr, "No action taken on PFS#%d\n", pfs.pfs_id);
 306                 exit(1);
 307         }
 308
 309         if ((pfs.ondisk->mirror_flags & HAMMER_PFSD_SLAVE) == 0) {
 310                 printf("This PFS is currently setup as a MASTER!\n");
 311                 printf("Are you absolutely sure you want to destroy it? ");
 312                 fflush(stdout);
 313                 if (getyn() == 0) {
 314                         fprintf(stderr, "No action taken on PFS#%d\n",
 315                                 pfs.pfs_id);
 316                         exit(1);
 317                 }
 318         }
 319
 320         printf("Destroying PFS #%d (%s) in ", pfs.pfs_id, pfs.ondisk->label);
 321         for (i = 5; i; --i) {
 322                 printf(" %d", i);
 323                 fflush(stdout);
 324                 sleep(1);
 325         }
 326         printf(".. starting destruction pass\n");
 327         fflush(stdout);
 328
 329         /*
 330          * Set the sync_beg_tid and sync_end_tid's to 1, once we start the
 331          * RMR the PFS is basically destroyed even if someone ^C's it.
 332          */
 333         pfs.ondisk->mirror_flags |= HAMMER_PFSD_SLAVE;
 334         pfs.ondisk->reserved01 = -1;
 335         pfs.ondisk->sync_beg_tid = 1;
 336         pfs.ondisk->sync_end_tid = 1;
 337
 338         if (ioctl(fd, HAMMERIOC_SET_PSEUDOFS, &pfs) < 0) {
 339                 fprintf(stderr, "Unable to update the PFS configuration: %s\n",
 340                         strerror(errno));
 341                 exit(1);
 342         }
 343
 344         /*
 345          * Ok, do it.  Remove the softlink on success.
 346          */
 347         if (ioctl(fd, HAMMERIOC_RMR_PSEUDOFS, &pfs) == 0) {
 348                 printf("pfs-destroy of PFS#%d succeeded!\n", pfs.pfs_id);
 349                 if (lstat(av[0], &st) == 0 && S_ISLNK(st.st_mode)) {
 350                         if (remove(av[0]) < 0) {
 351                                 fprintf(stderr, "Unable to remove softlink: %s "
 352                                         "(but the PFS has been destroyed)\n",
 353                                         av[0]);
 354                                 /* exit status 0 anyway */
 355                         }
 356                 }
 357         } else {
 358                 printf("pfs-destroy of PFS#%d failed: %s\n",
 359                         pfs.pfs_id, strerror(errno));
 360         }
 361 }
 362
 363 void
 364 hammer_cmd_pseudofs_upgrade(char **av, int ac)
 365 {
 366         struct hammer_ioc_pseudofs_rw pfs;
 367         int fd;
 368
 369         if (ac == 0)
 370                 pseudofs_usage(1);
 371         bzero(&pfs, sizeof(pfs));
 372         fd = getpfs(&pfs, av[0]);
 373
 374         if (pfs.pfs_id == 0) {
 375                 fprintf(stderr, "You cannot upgrade PFS#0"
 376                                 " (It should already be a master)\n");
 377                 exit(1);
 378         }
 379         if (ioctl(fd, HAMMERIOC_UPG_PSEUDOFS, &pfs) == 0) {
 380                 printf("pfs-upgrade of PFS#%d (%s) succeeded\n",
 381                         pfs.pfs_id, pfs.ondisk->label);
 382         } else {
 383                 fprintf(stderr, "pfs-upgrade of PFS#%d (%s) failed: %s\n",
 384                         pfs.pfs_id, pfs.ondisk->label, strerror(errno));
 385         }
 386 }
 387
 388 void
 389 hammer_cmd_pseudofs_downgrade(char **av, int ac)
 390 {
 391         struct hammer_ioc_pseudofs_rw pfs;
 392         int fd;
 393
 394         if (ac == 0)
 395                 pseudofs_usage(1);
 396         bzero(&pfs, sizeof(pfs));
 397         fd = getpfs(&pfs, av[0]);
 398
 399         if (pfs.pfs_id == 0) {
 400                 fprintf(stderr, "You cannot downgrade PFS#0\n");
 401                 exit(1);
 402         }
 403
 404         if (ioctl(fd, HAMMERIOC_DGD_PSEUDOFS, &pfs) == 0) {
 405                 printf("pfs-downgrade of PFS#%d (%s) succeeded\n",
 406                         pfs.pfs_id, pfs.ondisk->label);
 407         } else {
 408                 fprintf(stderr, "pfs-upgrade of PFS#%d (%s) failed: %s\n",
 409                         pfs.pfs_id, pfs.ondisk->label, strerror(errno));
 410         }
 411 }
 412
 413 void
 414 hammer_cmd_pseudofs_update(char **av, int ac)
 415 {
 416         struct hammer_ioc_pseudofs_rw pfs;
 417         int fd;
 418
 419         if (ac == 0)
 420                 pseudofs_usage(1);
 421         bzero(&pfs, sizeof(pfs));
 422         fd = getpfs(&pfs, av[0]);
 423
 424         printf("%s\n", av[0]);
 425         fflush(stdout);
 426
 427         if (ioctl(fd, HAMMERIOC_GET_PSEUDOFS, &pfs) == 0) {
 428                 parse_pfsd_options(av + 1, ac - 1, pfs.ondisk);
 429                 if ((pfs.ondisk->mirror_flags & HAMMER_PFSD_SLAVE) &&
 430                     pfs.pfs_id == 0) {
 431                         printf("The real mount point cannot be made a PFS "
 432                                "slave, only PFS sub-directories can be made "
 433                                "slaves\n");
 434                         exit(1);
 435                 }
 436                 pfs.bytes = sizeof(*pfs.ondisk);
 437                 if (ioctl(fd, HAMMERIOC_SET_PSEUDOFS, &pfs) == 0) {
 438                         if (ioctl(fd, HAMMERIOC_GET_PSEUDOFS, &pfs) == 0) {
 439                                 dump_pfsd(pfs.ondisk);
 440                         } else {
 441                                 printf("Unable to retrieve pfs configuration "
 442                                         "after successful update: %s\n",
 443                                         strerror(errno));
 444                                 exit(1);
 445                         }
 446                 } else {
 447                         printf("Unable to adjust pfs configuration: %s\n",
 448                                 strerror(errno));
 449                         exit(1);
 450                 }
 451         }
 452 }
 453
 454 static void
 455 init_pfsd(hammer_pseudofs_data_t pfsd, int is_slave)
 456 {
 457         uint32_t status;
 458
 459         pfsd->sync_beg_tid = 1;
 460         pfsd->sync_end_tid = 1;
 461         pfsd->sync_beg_ts = 0;
 462         pfsd->sync_end_ts = 0;
 463         uuid_create(&pfsd->shared_uuid, &status);
 464         uuid_create(&pfsd->unique_uuid, &status);
 465         if (is_slave)
 466                 pfsd->mirror_flags |= HAMMER_PFSD_SLAVE;
 467 }
 468
 469 static
 470 void
 471 dump_pfsd(hammer_pseudofs_data_t pfsd)
 472 {
 473         u_int32_t status;
 474         char *str = NULL;
 475
 476         printf("    sync-beg-tid=0x%016jx\n", (uintmax_t)pfsd->sync_beg_tid);
 477         printf("    sync-end-tid=0x%016jx\n", (uintmax_t)pfsd->sync_end_tid);
 478         uuid_to_string(&pfsd->shared_uuid, &str, &status);
 479         printf("    shared-uuid=%s\n", str);
 480         uuid_to_string(&pfsd->unique_uuid, &str, &status);
 481         printf("    unique-uuid=%s\n", str);
 482         if (pfsd->mirror_flags & HAMMER_PFSD_SLAVE) {
 483                 printf("    slave\n");
 484         }
 485         printf("    label=\"%s\"\n", pfsd->label);
 486         if (pfsd->snapshots[0])
 487                 printf("    snapshots=\"%s\"\n", pfsd->snapshots);
 488         if (pfsd->prune_min < (60 * 60 * 24)) {
 489                 printf("    prune-min=%02d:%02d:%02d\n",
 490                         pfsd->prune_min / 60 / 60 % 24,
 491                         pfsd->prune_min / 60 % 60,
 492                         pfsd->prune_min % 60);
 493         } else if (pfsd->prune_min % (60 * 60 * 24)) {
 494                 printf("    prune-min=%dd/%02d:%02d:%02d\n",
 495                         pfsd->prune_min / 60 / 60 / 24,
 496                         pfsd->prune_min / 60 / 60 % 24,
 497                         pfsd->prune_min / 60 % 60,
 498                         pfsd->prune_min % 60);
 499         } else {
 500                 printf("    prune-min=%dd\n", pfsd->prune_min / 60 / 60 / 24);
 501         }
 502
 503         if (pfsd->mirror_flags & HAMMER_PFSD_SLAVE) {
 504                 printf("    operating as a SLAVE\n");
 505                 if (pfsd->snapshots[0] == 0)
 506                         printf("    snapshots directory not set for slave\n");
 507         } else {
 508                 printf("    operating as a MASTER\n");
 509                 if (pfsd->snapshots[0] == 0) {
 510                         printf("    snapshots dir for master "
 511                                "defaults to <fs>/snapshots\n");
 512                 }
 513         }
 514 }
 515
 516 static void
 517 parse_pfsd_options(char **av, int ac, hammer_pseudofs_data_t pfsd)
 518 {
 519         char *cmd;
 520         char *ptr;
 521         int len;
 522         uint32_t status;
 523
 524         while (ac) {
 525                 cmd = *av;
 526                 if ((ptr = strchr(cmd, '=')) != NULL)
 527                         *ptr++ = 0;
 528
 529                 /*
 530                  * Basic assignment value test
 531                  */
 532                 if (ptr == NULL) {
 533                         fprintf(stderr,
 534                                 "option %s requires an assignment\n",
 535                                 cmd);
 536                         exit(1);
 537                 }
 538
 539                 status = uuid_s_ok;
 540                 if (strcmp(cmd, "sync-beg-tid") == 0) {
 541                         pfsd->sync_beg_tid = strtoull(ptr, NULL, 16);
 542                 } else if (strcmp(cmd, "sync-end-tid") == 0) {
 543                         pfsd->sync_end_tid = strtoull(ptr, NULL, 16);
 544                 } else if (strcmp(cmd, "shared-uuid") == 0) {
 545                         uuid_from_string(ptr, &pfsd->shared_uuid, &status);
 546                 } else if (strcmp(cmd, "unique-uuid") == 0) {
 547                         uuid_from_string(ptr, &pfsd->unique_uuid, &status);
 548                 } else if (strcmp(cmd, "label") == 0) {
 549                         len = strlen(ptr);
 550                         if (ptr[0] == '"' && ptr[len-1] == '"') {
 551                                 ptr[len-1] = 0;
 552                                 ++ptr;
 553                         } else if (ptr[0] == '"') {
 554                                 fprintf(stderr,
 555                                         "option %s: malformed string\n",
 556                                         cmd);
 557                                 exit(1);
 558                         }
 559                         snprintf(pfsd->label, sizeof(pfsd->label), "%s", ptr);
 560                 } else if (strcmp(cmd, "snapshots") == 0) {
 561                         len = strlen(ptr);
 562                         if (ptr[0] != '/') {
 563                                 fprintf(stderr,
 564                                         "option %s: '%s' must be an "
 565                                         "absolute path\n", cmd, ptr);
 566                                 if (ptr[0] == 0) {
 567                                         fprintf(stderr,
 568                                                 "use 'snapshots-clear' "
 569                                                 "to unset snapshots dir\n");
 570                                 }
 571                                 exit(1);
 572                         }
 573                         if (len >= (int)sizeof(pfsd->snapshots)) {
 574                                 fprintf(stderr,
 575                                         "option %s: path too long, %d "
 576                                         "character limit\n", cmd, len);
 577                                 exit(1);
 578                         }
 579                         snprintf(pfsd->snapshots, sizeof(pfsd->snapshots),
 580                                  "%s", ptr);
 581                 } else if (strcmp(cmd, "snapshots-clear") == 0) {
 582                         pfsd->snapshots[0] = 0;
 583                 } else if (strcmp(cmd, "prune-min") == 0) {
 584                         pfsd->prune_min = timetosecs(ptr);
 585                         if (pfsd->prune_min < 0) {
 586                                 fprintf(stderr,
 587                                         "option %s: illegal time spec, "
 588                                         "use Nd or [Nd/]hh[:mm[:ss]]\n", ptr);
 589                                 exit(1);
 590                         }
 591                 } else {
 592                         fprintf(stderr, "invalid option: %s\n", cmd);
 593                         exit(1);
 594                 }
 595                 if (status != uuid_s_ok) {
 596                         fprintf(stderr, "option %s: error parsing uuid %s\n",
 597                                 cmd, ptr);
 598                         exit(1);
 599                 }
 600                 --ac;
 601                 ++av;
 602         }
 603 }
 604
 605 static
 606 void
 607 pseudofs_usage(int code)
 608 {
 609         fprintf(stderr,
 610                 "hammer pfs-status <dirpath> ...\n"
 611                 "hammer pfs-master <dirpath> [options]\n"
 612                 "hammer pfs-slave <dirpath> [options]\n"
 613                 "hammer pfs-update <dirpath> [options]\n"
 614                 "hammer pfs-upgrade <dirpath>\n"
 615                 "hammer pfs-downgrade <dirpath>\n"
 616                 "hammer pfs-destroy <dirpath>\n"
 617                 "\n"
 618                 "options:\n"
 619                 "    sync-beg-tid=0x16llx\n"
 620                 "    sync-end-tid=0x16llx\n"
 621                 "    shared-uuid=0x16llx\n"
 622                 "    unique-uuid=0x16llx\n"
 623                 "    label=\"string\"\n"
 624                 "    snapshots=\"/path\"\n"
 625                 "    snapshots-clear\n"
 626                 "    prune-min=Nd\n"
 627                 "    prune-min=[Nd/]hh[:mm[:ss]]\n"
 628         );
 629         exit(code);
 630 }
 631
 632 static
 633 int
 634 getyn(void)
 635 {
 636         char buf[256];
 637         int len;
 638
 639         if (fgets(buf, sizeof(buf), stdin) == NULL)
 640                 return(0);
 641         len = strlen(buf);
 642         while (len && (buf[len-1] == '\n' || buf[len-1] == '\r'))
 643                 --len;
 644         buf[len] = 0;
 645         if (strcmp(buf, "y") == 0 ||
 646             strcmp(buf, "yes") == 0 ||
 647             strcmp(buf, "Y") == 0 ||
 648             strcmp(buf, "YES") == 0) {
 649                 return(1);
 650         }
 651         return(0);
 652 }
 653
 654 /*
 655  * Convert time in the form [Nd/][hh[:mm[:ss]]] to seconds.
 656  *
 657  * Return -1 if a parse error occurs.
 658  * Return 0x7FFFFFFF if the time exceeds the maximum allowed.
 659  */
 660 static
 661 int
 662 timetosecs(char *str)
 663 {
 664         int days = 0;
 665         int hrs = 0;
 666         int mins = 0;
 667         int secs = 0;
 668         int n;
 669         long long v;
 670         char *ptr;
 671
 672         n = strtol(str, &ptr, 10);
 673         if (n < 0)
 674                 return(-1);
 675         if (*ptr == 'd') {
 676                 days = n;
 677                 ++ptr;
 678                 if (*ptr == '/')
 679                     n = strtol(ptr + 1, &ptr, 10);
 680                 else
 681                     n = 0;
 682         }
 683         if (n < 0)
 684                 return(-1);
 685         hrs = n;
 686         if (*ptr == ':') {
 687                 n = strtol(ptr + 1, &ptr, 10);
 688                 if (n < 0)
 689                         return(-1);
 690                 mins = n;
 691                 if (*ptr == ':') {
 692                         n = strtol(ptr + 1, &ptr, 10);
 693                         if (n < 0)
 694                                 return(-1);
 695                         secs = n;
 696                 }
 697         }
 698         if (*ptr)
 699                 return(-1);
 700         v = days * 24 * 60 * 60 + hrs *  60 * 60 + mins * 60 + secs;
 701         if (v > 0x7FFFFFFF)
 702                 v = 0x7FFFFFFF;
 703         return((int)v);
 704 }