sbin/hammer/hammer.c

   1 /*
   2  * Copyright (c) 2007 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
  35 #include "hammer.h"
  36
  37 static void hammer_parsedevs(const char *blkdevs);
  38 static void sigalrm(int signo);
  39 static void sigintr(int signo);
  40 static void usage(int exit_code);
  41
  42 int RecurseOpt;
  43 int VerboseOpt;
  44 int QuietOpt;
  45 int NoSyncOpt;
  46 int TwoWayPipeOpt;
  47 int TimeoutOpt;
  48 int DelayOpt = 5;
  49 char *SshPort;
  50 int ForceYesOpt = 0;
  51 int CompressOpt;
  52 int ForceOpt;
  53 int RunningIoctl;
  54 int DidInterrupt;
  55 int BulkOpt;
  56 int AllPFS;
  57 u_int64_t BandwidthOpt;
  58 u_int64_t SplitupOpt = 4ULL * 1024ULL * 1024ULL * 1024ULL;
  59 u_int64_t MemoryLimit = 1024LLU * 1024 * 1024;
  60 const char *SplitupOptStr;
  61 const char *CyclePath;
  62 const char *RestrictTarget;
  63
  64 int
  65 main(int ac, char **av)
  66 {
  67         char *blkdevs = NULL;
  68         char *ptr;
  69         char *restrictcmd = NULL;
  70         u_int32_t status;
  71         int ch;
  72         int cacheSize = 0;
  73
  74         while ((ch = getopt(ac, av,
  75                             "b:c:de:hf:i:m:p:qrt:v2yABC:FR:S:T:X")) != -1) {
  76                 switch(ch) {
  77                 case '2':
  78                         TwoWayPipeOpt = 1;
  79                         break;
  80                 case 'y':
  81                         ForceYesOpt = 1;
  82                         break;
  83                 case 'b':
  84                         BandwidthOpt = strtoull(optarg, &ptr, 0);
  85                         switch(*ptr) {
  86                         case 'g':
  87                         case 'G':
  88                                 BandwidthOpt *= 1024;
  89                                 /* fall through */
  90                         case 'm':
  91                         case 'M':
  92                                 BandwidthOpt *= 1024;
  93                                 /* fall through */
  94                         case 'k':
  95                         case 'K':
  96                                 BandwidthOpt *= 1024;
  97                                 break;
  98                         case '\0':
  99                                 /* bytes per second if no suffix */
 100                                 break;
 101                         default:
 102                                 usage(1);
 103                         }
 104                         break;
 105                 case 'S':
 106                         SplitupOptStr = strdup(optarg);
 107                         SplitupOpt = strtoull(optarg, &ptr, 0);
 108                         switch(*ptr) {
 109                         case 'g':
 110                         case 'G':
 111                                 SplitupOpt *= 1024;
 112                                 /* fall through */
 113                         case 'm':
 114                         case 'M':
 115                                 SplitupOpt *= 1024;
 116                                 /* fall through */
 117                         case 'k':
 118                         case 'K':
 119                                 SplitupOpt *= 1024;
 120                                 break;
 121                         case '\0':
 122                                 /* bytes per second if no suffix */
 123                                 break;
 124                         default:
 125                                 usage(1);
 126                         }
 127                         break;
 128                 case 'c':
 129                         CyclePath = optarg;
 130                         break;
 131                 case 'd':
 132                         ++DebugOpt;
 133                         break;
 134                 case 'e':
 135                         ScoreBoardFile = optarg;
 136                         break;
 137                 case 'h':
 138                         usage(0);
 139                         /* not reached */
 140                 case 'i':
 141                         DelayOpt = strtol(optarg, NULL, 0);
 142                         break;
 143                 case 'm':
 144                         MemoryLimit = strtouq(optarg, &ptr, 0);
 145                         switch(*ptr) {
 146                         case 't':
 147                         case 'T':
 148                                 MemoryLimit *= 1024;
 149                                 /* fall through */
 150                         case 'g':
 151                         case 'G':
 152                                 MemoryLimit *= 1024;
 153                                 /* fall through */
 154                         case 'm':
 155                         case 'M':
 156                                 MemoryLimit *= 1024;
 157                                 /* fall through */
 158                         case 'k':
 159                         case 'K':
 160                                 MemoryLimit *= 1024;
 161                                 /* fall through */
 162                         default:
 163                                 break;
 164                         }
 165
 166                         /* minimum limit */
 167                         if (MemoryLimit < 1024 * 1024)
 168                                 MemoryLimit = 1024 * 1024;
 169                         break;
 170                 case 'p':
 171                         SshPort = optarg;
 172                         break;
 173                 case 'r':
 174                         RecurseOpt = 1;
 175                         break;
 176                 case 'f':
 177                         blkdevs = optarg;
 178                         break;
 179                 case 't':
 180                         TimeoutOpt = strtol(optarg, NULL, 0);
 181                         break;
 182                 case 'v':
 183                         if (QuietOpt > 0)
 184                                 --QuietOpt;
 185                         else
 186                                 ++VerboseOpt;
 187                         break;
 188                 case 'q':
 189                         if (VerboseOpt > 0)
 190                                 --VerboseOpt;
 191                         else
 192                                 ++QuietOpt;
 193                         break;
 194                 case 'A':
 195                         AllPFS = 1;
 196                         break;
 197                 case 'B':
 198                         BulkOpt = 1;
 199                         break;
 200                 case 'C':
 201                         cacheSize = strtol(optarg, &ptr, 0);
 202                         switch(*ptr) {
 203                         case 'm':
 204                         case 'M':
 205                                 cacheSize *= 1024;
 206                                 /* fall through */
 207                         case 'k':
 208                         case 'K':
 209                                 cacheSize *= 1024;
 210                                 ++ptr;
 211                                 break;
 212                         case '\0':
 213                         case ':':
 214                                 /* bytes if no suffix */
 215                                 break;
 216                         default:
 217                                 usage(1);
 218                         }
 219                         if (*ptr == ':') {
 220                                 UseReadAhead = strtol(ptr + 1, NULL, 0);
 221                                 UseReadBehind = -UseReadAhead;
 222                         }
 223                         if (cacheSize < 1024 * 1024)
 224                                 cacheSize = 1024 * 1024;
 225                         if (UseReadAhead < 0)
 226                                 usage(1);
 227                         if (UseReadAhead * HAMMER_BUFSIZE / cacheSize / 16) {
 228                                 UseReadAhead = cacheSize / 16 / HAMMER_BUFSIZE;
 229                                 UseReadBehind = -UseReadAhead;
 230                         }
 231                         hammer_cache_set(cacheSize);
 232                         break;
 233                 case 'F':
 234                         ForceOpt = 1;
 235                         break;
 236                 case 'R':
 237                         if (restrictcmd == NULL)
 238                                 restrictcmd = optarg;
 239                         break;
 240                 case 'T':
 241                         if (RestrictTarget == NULL)
 242                                 RestrictTarget = optarg;
 243                         break;
 244                 case 'X':
 245                         CompressOpt = 1;
 246                         break;
 247                 default:
 248                         usage(1);
 249                         /* not reached */
 250                 }
 251         }
 252         ac -= optind;
 253         av += optind;
 254         if (ac < 1) {
 255                 usage(1);
 256                 /* not reached */
 257         }
 258
 259         signal(SIGALRM, sigalrm);
 260         signal(SIGINT, sigintr);
 261
 262         /*
 263          * Check command restriction (used by hammer ssh-remote).  Several
 264          * commands may be iterated with a comma.
 265          */
 266         if (restrictcmd) {
 267                 char *elm;
 268
 269                 ptr = strdup(restrictcmd);
 270                 while ((elm = strsep(&ptr, ",")) != NULL) {
 271                         if (strcmp(av[0], elm) == 0)
 272                                 break;
 273                 }
 274                 if (elm == NULL) {
 275                         fprintf(stderr, "hammer-remote: request does not match "
 276                                         "restricted command\n");
 277                         exit(1);
 278                 }
 279                 free(ptr);
 280         }
 281
 282         /*
 283          * Parse commands
 284          */
 285         if (strcmp(av[0], "synctid") == 0) {
 286                 hammer_cmd_synctid(av + 1, ac - 1);
 287                 exit(0);
 288         }
 289         if (strcmp(av[0], "namekey2") == 0) {
 290                 int64_t key;
 291                 int32_t crcx;
 292                 int len;
 293                 const char *aname = av[1];
 294
 295                 if (aname == NULL)
 296                         usage(1);
 297                 len = strlen(aname);
 298                 key = (u_int32_t)crc32(aname, len) & 0xFFFFFFFEU;
 299
 300                 switch(len) {
 301                 default:
 302                         crcx = crc32(aname + 3, len - 5);
 303                         crcx = crcx ^ (crcx >> 6) ^ (crcx >> 12);
 304                         key |= (int64_t)(crcx & 0x3F) << 42;
 305                         /* fall through */
 306                 case 5:
 307                 case 4:
 308                         /* fall through */
 309                 case 3:
 310                         key |= ((int64_t)(aname[2] & 0x1F) << 48);
 311                         /* fall through */
 312                 case 2:
 313                         key |= ((int64_t)(aname[1] & 0x1F) << 53) |
 314                                ((int64_t)(aname[len-2] & 0x1F) << 37);
 315                         /* fall through */
 316                 case 1:
 317                         key |= ((int64_t)(aname[0] & 0x1F) << 58) |
 318                                ((int64_t)(aname[len-1] & 0x1F) << 32);
 319                         /* fall through */
 320                 case 0:
 321                         break;
 322                 }
 323                 if (key == 0)
 324                         key |= 0x100000000LL;
 325                 printf("0x%016jx\n", (uintmax_t)key);
 326                 exit(0);
 327         }
 328         if (strcmp(av[0], "namekey1") == 0) {
 329                 int64_t key;
 330
 331                 if (av[1] == NULL)
 332                         usage(1);
 333                 key = (int64_t)(crc32(av[1], strlen(av[1])) & 0x7FFFFFFF) << 32;
 334                 if (key == 0)
 335                         key |= 0x100000000LL;
 336                 printf("0x%016jx\n", (uintmax_t)key);
 337                 exit(0);
 338         }
 339         if (strcmp(av[0], "namekey32") == 0) {
 340                 int32_t key;
 341
 342                 if (av[1] == NULL)
 343                         usage(1);
 344                 key = crc32(av[1], strlen(av[1])) & 0x7FFFFFFF;
 345                 if (key == 0)
 346                         ++key;
 347                 printf("0x%08x\n", key);
 348                 exit(0);
 349         }
 350         if (strcmp(av[0], "pfs-status") == 0) {
 351                 hammer_cmd_pseudofs_status(av + 1, ac - 1);
 352                 exit(0);
 353         }
 354         if (strcmp(av[0], "pfs-master") == 0) {
 355                 hammer_cmd_pseudofs_create(av + 1, ac - 1, 0);
 356                 exit(0);
 357         }
 358         if (strcmp(av[0], "pfs-slave") == 0) {
 359                 hammer_cmd_pseudofs_create(av + 1, ac - 1, 1);
 360                 exit(0);
 361         }
 362         if (strcmp(av[0], "pfs-update") == 0) {
 363                 hammer_cmd_pseudofs_update(av + 1, ac - 1);
 364                 exit(0);
 365         }
 366         if (strcmp(av[0], "pfs-upgrade") == 0) {
 367                 hammer_cmd_pseudofs_upgrade(av + 1, ac - 1);
 368                 exit(0);
 369         }
 370         if (strcmp(av[0], "pfs-downgrade") == 0) {
 371                 hammer_cmd_pseudofs_downgrade(av + 1, ac - 1);
 372                 exit(0);
 373         }
 374         if (strcmp(av[0], "pfs-destroy") == 0) {
 375                 hammer_cmd_pseudofs_destroy(av + 1, ac - 1);
 376                 exit(0);
 377         }
 378         if (strcmp(av[0], "prune") == 0) {
 379                 hammer_cmd_softprune(av + 1, ac - 1, 0);
 380                 exit(0);
 381         }
 382         if (strcmp(av[0], "config") == 0) {
 383                 hammer_cmd_config(av + 1, ac - 1);
 384                 exit(0);
 385         }
 386         if (strcmp(av[0], "viconfig") == 0) {
 387                 hammer_cmd_viconfig(av + 1, ac - 1);
 388                 exit(0);
 389         }
 390         if (strcmp(av[0], "cleanup") == 0) {
 391                 hammer_cmd_cleanup(av + 1, ac - 1);
 392                 exit(0);
 393         }
 394         if (strcmp(av[0], "abort-cleanup") == 0) {
 395                 hammer_cmd_abort_cleanup(av + 1, ac - 1);
 396                 exit(0);
 397         }
 398         if (strcmp(av[0], "info") == 0) {
 399                 hammer_cmd_info(av + 1, ac - 1);
 400                 exit(0);
 401         }
 402         if (strcmp(av[0], "prune-everything") == 0) {
 403                 hammer_cmd_softprune(av + 1, ac - 1, 1);
 404                 exit(0);
 405         }
 406         if (strcmp(av[0], "ssh-remote") == 0) {
 407                 if (ac != 3)
 408                         usage(1);
 409                 hammer_cmd_sshremote(av[1], av[2]);
 410                 exit(0);
 411         }
 412         if (strcmp(av[0], "snap") == 0) {
 413                 hammer_cmd_snap(av + 1, ac - 1, 0, 1);
 414                 exit(0);
 415         }
 416         if (strcmp(av[0], "snaplo") == 0) {
 417                 hammer_cmd_snap(av + 1, ac - 1, 0, 0);
 418                 exit(0);
 419         }
 420         if (strcmp(av[0], "snapq") == 0) {
 421                 hammer_cmd_snap(av + 1, ac - 1, 1, 0);
 422                 exit(0);
 423         }
 424         if (strcmp(av[0], "snapls") == 0) {
 425                 hammer_cmd_snapls(av + 1, ac - 1);
 426                 exit(0);
 427         }
 428         if (strcmp(av[0], "snaprm") == 0) {
 429                 hammer_cmd_snaprm(av + 1, ac - 1);
 430                 exit(0);
 431         }
 432         if (strcmp(av[0], "snapshot") == 0) {
 433                 hammer_cmd_snapshot(av + 1, ac - 1);
 434                 exit(0);
 435         }
 436         if (strcmp(av[0], "bstats") == 0) {
 437                 hammer_cmd_bstats(av + 1, ac - 1);
 438                 exit(0);
 439         }
 440         if (strcmp(av[0], "iostats") == 0) {
 441                 hammer_cmd_iostats(av + 1, ac - 1);
 442                 exit(0);
 443         }
 444         if (strcmp(av[0], "stats") == 0) {
 445                 hammer_cmd_stats(av + 1, ac - 1);
 446                 exit(0);
 447         }
 448
 449         if (strncmp(av[0], "history", 7) == 0) {
 450                 hammer_cmd_history(av[0] + 7, av + 1, ac - 1);
 451                 exit(0);
 452         }
 453         if (strcmp(av[0], "rebalance") == 0) {
 454                 signal(SIGINT, sigalrm);
 455                 hammer_cmd_rebalance(av + 1, ac - 1);
 456                 exit(0);
 457         }
 458         if (strncmp(av[0], "reblock", 7) == 0) {
 459                 signal(SIGINT, sigalrm);
 460                 if (strcmp(av[0], "reblock") == 0)
 461                         hammer_cmd_reblock(av + 1, ac - 1, HAMMER_IOC_DO_FLAGS);
 462                 else if (strcmp(av[0], "reblock-btree") == 0)
 463                         hammer_cmd_reblock(av + 1, ac - 1, HAMMER_IOC_DO_BTREE);
 464                 else if (strcmp(av[0], "reblock-inodes") == 0)
 465                         hammer_cmd_reblock(av + 1, ac - 1, HAMMER_IOC_DO_INODES);
 466                 else if (strcmp(av[0], "reblock-dirs") == 0)
 467                         hammer_cmd_reblock(av + 1, ac - 1, HAMMER_IOC_DO_DIRS);
 468                 else if (strcmp(av[0], "reblock-data") == 0)
 469                         hammer_cmd_reblock(av + 1, ac - 1, HAMMER_IOC_DO_DATA);
 470                 else
 471                         usage(1);
 472                 exit(0);
 473         }
 474         if (strncmp(av[0], "mirror", 6) == 0) {
 475                 if (strcmp(av[0], "mirror-read") == 0)
 476                         hammer_cmd_mirror_read(av + 1, ac - 1, 0);
 477                 else if (strcmp(av[0], "mirror-read-stream") == 0)
 478                         hammer_cmd_mirror_read(av + 1, ac - 1, 1);
 479                 else if (strcmp(av[0], "mirror-write") == 0)
 480                         hammer_cmd_mirror_write(av + 1, ac - 1);
 481                 else if (strcmp(av[0], "mirror-copy") == 0)
 482                         hammer_cmd_mirror_copy(av + 1, ac - 1, 0);
 483                 else if (strcmp(av[0], "mirror-stream") == 0)
 484                         hammer_cmd_mirror_copy(av + 1, ac - 1, 1);
 485                 else if (strcmp(av[0], "mirror-dump") == 0)
 486                         hammer_cmd_mirror_dump(av + 1, ac - 1);
 487                 else
 488                         usage(1);
 489                 exit(0);
 490         }
 491         if (strcmp(av[0], "dedup-simulate") == 0) {
 492                 hammer_cmd_dedup_simulate(av + 1, ac - 1);
 493                 exit(0);
 494         }
 495         if (strcmp(av[0], "dedup") == 0) {
 496                 hammer_cmd_dedup(av + 1, ac - 1);
 497                 exit(0);
 498         }
 499         if (strcmp(av[0], "version") == 0) {
 500                 hammer_cmd_get_version(av + 1, ac - 1);
 501                 exit(0);
 502         }
 503         if (strcmp(av[0], "version-upgrade") == 0) {
 504                 hammer_cmd_set_version(av + 1, ac - 1);
 505                 exit(0);
 506         }
 507         if (strcmp(av[0], "volume-add") == 0) {
 508                 hammer_cmd_volume_add(av + 1, ac - 1);
 509                 exit(0);
 510         }
 511         if (strcmp(av[0], "volume-del") == 0) {
 512                 hammer_cmd_volume_del(av + 1, ac - 1);
 513                 exit(0);
 514         }
 515         if (strcmp(av[0], "volume-list") == 0) {
 516                 hammer_cmd_volume_list(av + 1, ac - 1, av[0]);
 517                 exit(0);
 518         }
 519         if (strcmp(av[0], "volume-blkdevs") == 0) {
 520                 hammer_cmd_volume_blkdevs(av + 1, ac - 1, av[0]);
 521                 exit(0);
 522         }
 523
 524         uuid_name_lookup(&Hammer_FSType, "DragonFly HAMMER", &status);
 525         if (status != uuid_s_ok) {
 526                 errx(1, "uuids file does not have the DragonFly "
 527                         "HAMMER filesystem type");
 528         }
 529
 530         if (strcmp(av[0], "show") == 0) {
 531                 const char *arg = NULL;
 532                 int filter = -1;
 533
 534                 hammer_parsedevs(blkdevs);
 535                 if (ac > 1)
 536                         arg = av[1];
 537                 if (ac > 2) {
 538                         if (strcmp(av[2], "filter") == 0)
 539                                 filter = 1;
 540                         else if (strcmp(av[2], "nofilter") == 0)
 541                                 filter = 0;
 542                 }
 543                 hammer_cmd_show(-1, arg, filter, 0, NULL, NULL);
 544                 exit(0);
 545         }
 546         if (strcmp(av[0], "show-undo") == 0) {
 547                 hammer_parsedevs(blkdevs);
 548                 hammer_cmd_show_undo();
 549                 exit(0);
 550         }
 551         if (strcmp(av[0], "recover") == 0) {
 552                 hammer_parsedevs(blkdevs);
 553                 if (ac <= 1)
 554                         errx(1, "hammer recover required target directory");
 555                 hammer_cmd_recover(av[1]);
 556                 exit(0);
 557         }
 558         if (strcmp(av[0], "blockmap") == 0) {
 559                 hammer_parsedevs(blkdevs);
 560                 hammer_cmd_blockmap();
 561                 exit(0);
 562         }
 563         if (strcmp(av[0], "checkmap") == 0) {
 564                 hammer_parsedevs(blkdevs);
 565                 hammer_cmd_checkmap();
 566                 exit(0);
 567         }
 568         usage(1);
 569         /* not reached */
 570         return(0);
 571 }
 572
 573 /*
 574  * Parse the device specification.
 575  *
 576  * Multi-volume hammer devices are colon-separated.  Each element
 577  * may be further expanded via /etc/devtab.  One may also specify
 578  * a single element which is expanded into multiple elements via
 579  * /etc/devtab.
 580  */
 581 static
 582 void
 583 hammer_parsedevs(const char *blkdevs)
 584 {
 585         struct volume_info *vol = NULL;
 586         char *copy;
 587         char *volname;
 588         int volnum = 0;
 589
 590         if (blkdevs == NULL) {
 591                 errx(1, "A -f blkdevs specification is required "
 592                         "for this command");
 593         }
 594
 595         copy = strdup(blkdevs);
 596         while ((volname = copy) != NULL) {
 597                 if ((copy = strchr(copy, ':')) != NULL)
 598                         *copy++ = 0;
 599                 volname = getdevpath(volname, 0);
 600                 if (strchr(volname, ':'))
 601                         hammer_parsedevs(volname);
 602                 else {
 603                         vol = setup_volume(-1, volname, 0, O_RDONLY);
 604                         assert(vol);
 605                         ++volnum;
 606                 }
 607                 free(volname);
 608         }
 609         free(copy);
 610
 611         /*
 612          * All volumes have the same vol_count.
 613          */
 614         assert(vol);
 615         if (volnum != vol->ondisk->vol_count)
 616                 errx(1, "Volume header says %d volumes, but %d specified.",
 617                         vol->ondisk->vol_count, volnum);
 618
 619         assert(NumVolumes == 0);
 620         NumVolumes = volnum;
 621 }
 622
 623 static
 624 void
 625 sigalrm(int signo __unused)
 626 {
 627         /* do nothing (interrupts HAMMER ioctl) */
 628 }
 629
 630 static
 631 void
 632 sigintr(int signo __unused)
 633 {
 634         if (RunningIoctl == 0)
 635                 _exit(1);
 636         DidInterrupt = 1;
 637         /* do nothing (interrupts HAMMER ioctl) */
 638 }
 639
 640 static
 641 void
 642 usage(int exit_code)
 643 {
 644         fprintf(stderr,
 645                 "hammer -h\n"
 646                 "hammer [-2ABFqrvXy] [-b bandwidth] [-C cachesize[:readahead]] \n"
 647                 "       [-R restrictcmd] [-T restrictpath] [-c cyclefile]\n"
 648                 "       [-e scoreboardfile] [-f blkdevs] [-i delay] [-p ssh-port]\n"
 649                 "       [-S splitsize] [-t seconds] [-m memlimit] command [argument ...]\n"
 650                 "hammer synctid <filesystem> [quick]\n"
 651                 "hammer bstats [interval]\n"
 652                 "hammer iostats [interval]\n"
 653                 "hammer stats [interval]\n"
 654                 "hammer history[@offset[,len]] <file> ...\n"
 655                 "hammer namekey1 <path>\n"
 656                 "hammer namekey2 <path>\n"
 657                 "hammer namekey32 <path>\n"
 658                 "hammer cleanup [<filesystem> ...]\n"
 659                 "hammer abort-cleanup\n"
 660                 "hammer info [<dirpath> ...]\n"
 661                 "hammer snapshot [<filesystem>] <snapshot-dir>\n"
 662                 "hammer snapshot <filesystem> <snapshot-dir> [<note>]\n"
 663                 "hammer prune <softlink-dir>\n"
 664                 "hammer prune-everything <filesystem>\n"
 665                 "hammer rebalance <filesystem> [saturation_percentage]\n"
 666                 "hammer reblock[-btree|-inodes|-dirs|-data] "
 667                         "<filesystem> [fill_percentage]\n"
 668                 "hammer pfs-status <dirpath> ...\n"
 669                 "hammer pfs-master <dirpath> [options]\n"
 670                 "hammer pfs-slave <dirpath> [options]\n"
 671                 "hammer pfs-update <dirpath> [options]\n"
 672                 "hammer pfs-upgrade <dirpath>\n"
 673                 "hammer pfs-downgrade <dirpath>\n"
 674                 "hammer pfs-destroy <dirpath>\n"
 675                 "hammer mirror-read <filesystem> [begin-tid]\n"
 676                 "hammer mirror-read-stream <filesystem> [begin-tid]\n"
 677                 "hammer mirror-write <filesystem>\n"
 678                 "hammer mirror-dump [header]\n"
 679                 "hammer mirror-copy [[user@]host:]<filesystem>"
 680                                   " [[user@]host:]<filesystem>\n"
 681                 "hammer mirror-stream [[user@]host:]<filesystem>"
 682                                     " [[user@]host:]<filesystem>\n"
 683                 "hammer ssh-remote command filesystem\n"
 684                 "hammer version <filesystem>\n"
 685                 "hammer version-upgrade <filesystem> <version> [force]\n"
 686                 "hammer volume-add <device> <filesystem>\n"
 687                 "hammer volume-del <device> <filesystem>\n"
 688                 "hammer volume-list <filesystem>\n"
 689                 "hammer volume-blkdevs <filesystem>\n"
 690         );
 691
 692         fprintf(stderr, "\nHAMMER utility version 3+ commands:\n");
 693
 694         fprintf(stderr,
 695                 "hammer config [<filesystem> [<configfile>]]\n"
 696                 "hammer viconfig [<filesystem>]\n"
 697                 "hammer snap <path> [<note>]\n"
 698                 "hammer snaplo <path> [<note>]\n"
 699                 "hammer snapq <dir> [<note>]\n"
 700                 "hammer snaprm <path> ...\n"
 701                 "hammer snaprm <transid> ...\n"
 702                 "hammer snaprm <filesystem> <transid> ...\n"
 703                 "hammer snapls [<path> ...]\n"
 704         );
 705
 706         fprintf(stderr, "\nHAMMER utility version 4+ commands:\n");
 707
 708         fprintf(stderr,
 709                 "hammer -f blkdevs blockmap\n"
 710                 "hammer -f blkdevs checkmap\n"
 711                 "hammer -f blkdevs [-qqq] show [lo:objid]\n"
 712                 "hammer -f blkdevs show-undo\n"
 713                 "hammer -f blkdevs recover <target_dir>\n"
 714         );
 715
 716         fprintf(stderr, "\nHAMMER utility version 5+ commands:\n");
 717
 718         fprintf(stderr,
 719                 "hammer dedup-simulate <filesystem>\n"
 720                 "hammer dedup <filesystem>\n"
 721         );
 722
 723         exit(exit_code);
 724 }
 725