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