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