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  * $DragonFly: src/sbin/hammer/hammer.c,v 1.44 2008/11/13 02:04:27 dillon Exp $
  35  */
  36
  37 #include "hammer.h"
  38 #include <signal.h>
  39 #include <math.h>
  40 #include <fstab.h>
  41
  42 static void hammer_parsedevs(const char *blkdevs);
  43 static void sigalrm(int signo);
  44 static void sigintr(int signo);
  45 static void usage(int exit_code);
  46
  47 int RecurseOpt;
  48 int VerboseOpt;
  49 int QuietOpt;
  50 int NoSyncOpt;
  51 int TwoWayPipeOpt;
  52 int TimeoutOpt;
  53 int DelayOpt = 5;
  54 char *SshPort;
  55 int ForceYesOpt = 0;
  56 int CompressOpt;
  57 int ForceOpt;
  58 int RunningIoctl;
  59 int DidInterrupt;
  60 int BulkOpt;
  61 u_int64_t BandwidthOpt;
  62 u_int64_t SplitupOpt = 4ULL * 1024ULL * 1024ULL * 1024ULL;
  63 u_int64_t MemoryLimit = 1024LLU * 1024 * 1024;
  64 const char *SplitupOptStr;
  65 const char *CyclePath;
  66 const char *LinkPath;
  67 const char *RestrictTarget;
  68
  69 int
  70 main(int ac, char **av)
  71 {
  72         char *blkdevs = NULL;
  73         char *ptr;
  74         char *restrictcmd = NULL;
  75         u_int32_t status;
  76         int ch;
  77         int cacheSize = 0;
  78
  79         while ((ch = getopt(ac, av,
  80                             "b:c:de:hf:i:m:p:qrs:t:v2yBC:FR:S:T:X")) != -1) {
  81                 switch(ch) {
  82                 case '2':
  83                         TwoWayPipeOpt = 1;
  84                         break;
  85                 case 'y':
  86                         ForceYesOpt = 1;
  87                         break;
  88                 case 'b':
  89                         BandwidthOpt = strtoull(optarg, &ptr, 0);
  90                         switch(*ptr) {
  91                         case 'g':
  92                         case 'G':
  93                                 BandwidthOpt *= 1024;
  94                                 /* fall through */
  95                         case 'm':
  96                         case 'M':
  97                                 BandwidthOpt *= 1024;
  98                                 /* fall through */
  99                         case 'k':
 100                         case 'K':
 101                                 BandwidthOpt *= 1024;
 102                                 break;
 103                         case '\0':
 104                                 /* bytes per second if no suffix */
 105                                 break;
 106                         default:
 107                                 usage(1);
 108                         }
 109                         break;
 110                 case 'S':
 111                         SplitupOptStr = strdup(optarg);
 112                         SplitupOpt = strtoull(optarg, &ptr, 0);
 113                         switch(*ptr) {
 114                         case 'g':
 115                         case 'G':
 116                                 SplitupOpt *= 1024;
 117                                 /* fall through */
 118                         case 'm':
 119                         case 'M':
 120                                 SplitupOpt *= 1024;
 121                                 /* fall through */
 122                         case 'k':
 123                         case 'K':
 124                                 SplitupOpt *= 1024;
 125                                 break;
 126                         case '\0':
 127                                 /* bytes per second if no suffix */
 128                                 break;
 129                         default:
 130                                 usage(1);
 131                         }
 132                         break;
 133                 case 'c':
 134                         CyclePath = optarg;
 135                         break;
 136                 case 'd':
 137                         ++DebugOpt;
 138                         break;
 139                 case 'e':
 140                         ScoreBoardFile = optarg;
 141                         break;
 142                 case 'h':
 143                         usage(0);
 144                         /* not reached */
 145                 case 'i':
 146                         DelayOpt = strtol(optarg, NULL, 0);
 147                         break;
 148                 case 'm':
 149                         MemoryLimit = strtouq(optarg, &ptr, 0);
 150                         switch(*ptr) {
 151                         case 't':
 152                         case 'T':
 153                                 MemoryLimit *= 1024;
 154                                 /* fall through */
 155                         case 'g':
 156                         case 'G':
 157                                 MemoryLimit *= 1024;
 158                                 /* fall through */
 159                         case 'm':
 160                         case 'M':
 161                                 MemoryLimit *= 1024;
 162                                 /* fall through */
 163                         case 'k':
 164                         case 'K':
 165                                 MemoryLimit *= 1024;
 166                                 /* fall through */
 167                         default:
 168                                 break;
 169                         }
 170
 171                         /* minimum limit */
 172                         if (MemoryLimit < 1024 * 1024)
 173                                 MemoryLimit = 1024 * 1024;
 174                         break;
 175                 case 'p':
 176                         SshPort = optarg;
 177                         break;
 178                 case 'r':
 179                         RecurseOpt = 1;
 180                         break;
 181                 case 'f':
 182                         blkdevs = optarg;
 183                         break;
 184                 case 's':
 185                         LinkPath = optarg;
 186                         break;
 187                 case 't':
 188                         TimeoutOpt = strtol(optarg, NULL, 0);
 189                         break;
 190                 case 'v':
 191                         if (QuietOpt > 0)
 192                                 --QuietOpt;
 193                         else
 194                                 ++VerboseOpt;
 195                         break;
 196                 case 'q':
 197                         if (VerboseOpt > 0)
 198                                 --VerboseOpt;
 199                         else
 200                                 ++QuietOpt;
 201                         break;
 202                 case 'B':
 203                         BulkOpt = 1;
 204                         break;
 205                 case 'C':
 206                         cacheSize = strtol(optarg, &ptr, 0);
 207                         switch(*ptr) {
 208                         case 'm':
 209                         case 'M':
 210                                 cacheSize *= 1024;
 211                                 /* fall through */
 212                         case 'k':
 213                         case 'K':
 214                                 cacheSize *= 1024;
 215                                 ++ptr;
 216                                 break;
 217                         case '\0':
 218                         case ':':
 219                                 /* bytes if no suffix */
 220                                 break;
 221                         default:
 222                                 usage(1);
 223                         }
 224                         if (*ptr == ':') {
 225                                 UseReadAhead = strtol(ptr + 1, NULL, 0);
 226                                 UseReadBehind = -UseReadAhead;
 227                         }
 228                         if (cacheSize < 1024 * 1024)
 229                                 cacheSize = 1024 * 1024;
 230                         if (UseReadAhead < 0)
 231                                 usage(1);
 232                         if (UseReadAhead * HAMMER_BUFSIZE / cacheSize / 16) {
 233                                 UseReadAhead = cacheSize / 16 / HAMMER_BUFSIZE;
 234                                 UseReadBehind = -UseReadAhead;
 235                         }
 236                         hammer_cache_set(cacheSize);
 237                         break;
 238                 case 'F':
 239                         ForceOpt = 1;
 240                         break;
 241                 case 'R':
 242                         if (restrictcmd == NULL)
 243                                 restrictcmd = optarg;
 244                         break;
 245                 case 'T':
 246                         if (RestrictTarget == NULL)
 247                                 RestrictTarget = optarg;
 248                         break;
 249                 case 'X':
 250                         CompressOpt = 1;
 251                         break;
 252                 default:
 253                         usage(1);
 254                         /* not reached */
 255                 }
 256         }
 257         ac -= optind;
 258         av += optind;
 259         if (ac < 1) {
 260                 usage(1);
 261                 /* not reached */
 262         }
 263
 264         signal(SIGALRM, sigalrm);
 265         signal(SIGINT, sigintr);
 266
 267         /*
 268          * Check command restriction (used by hammer ssh-remote).  Several
 269          * commands may be iterated with a comma.
 270          */
 271         if (restrictcmd) {
 272                 char *elm;
 273
 274                 ptr = strdup(restrictcmd);
 275                 while ((elm = strsep(&ptr, ",")) != NULL) {
 276                         if (strcmp(av[0], elm) == 0)
 277                                 break;
 278                 }
 279                 if (elm == NULL) {
 280                         fprintf(stderr, "hammer-remote: request does not match "
 281                                         "restricted command\n");
 282                         exit(1);
 283                 }
 284                 free(ptr);
 285         }
 286
 287         /*
 288          * Parse commands
 289          */
 290         if (strcmp(av[0], "synctid") == 0) {
 291                 hammer_cmd_synctid(av + 1, ac - 1);
 292                 exit(0);
 293         }
 294         if (strcmp(av[0], "namekey2") == 0) {
 295                 int64_t key;
 296                 int32_t crcx;
 297                 int len;
 298                 const char *aname = av[1];
 299
 300                 if (aname == NULL)
 301                         usage(1);
 302                 len = strlen(aname);
 303                 key = (u_int32_t)crc32(aname, len) & 0xFFFFFFFEU;
 304
 305                 switch(len) {
 306                 default:
 307                         crcx = crc32(aname + 3, len - 5);
 308                         crcx = crcx ^ (crcx >> 6) ^ (crcx >> 12);
 309                         key |= (int64_t)(crcx & 0x3F) << 42;
 310                         /* fall through */
 311                 case 5:
 312                 case 4:
 313                         /* fall through */
 314                 case 3:
 315                         key |= ((int64_t)(aname[2] & 0x1F) << 48);
 316                         /* fall through */
 317                 case 2:
 318                         key |= ((int64_t)(aname[1] & 0x1F) << 53) |
 319                                ((int64_t)(aname[len-2] & 0x1F) << 37);
 320                         /* fall through */
 321                 case 1:
 322                         key |= ((int64_t)(aname[0] & 0x1F) << 58) |
 323                                ((int64_t)(aname[len-1] & 0x1F) << 32);
 324                         /* fall through */
 325                 case 0:
 326                         break;
 327                 }
 328                 if (key == 0)
 329                         key |= 0x100000000LL;
 330                 printf("0x%016jx\n", (uintmax_t)key);
 331                 exit(0);
 332         }
 333         if (strcmp(av[0], "namekey1") == 0) {
 334                 int64_t key;
 335
 336                 if (av[1] == NULL)
 337                         usage(1);
 338                 key = (int64_t)(crc32(av[1], strlen(av[1])) & 0x7FFFFFFF) << 32;
 339                 if (key == 0)
 340                         key |= 0x100000000LL;
 341                 printf("0x%016jx\n", (uintmax_t)key);
 342                 exit(0);
 343         }
 344         if (strcmp(av[0], "namekey32") == 0) {
 345                 int32_t key;
 346
 347                 if (av[1] == NULL)
 348                         usage(1);
 349                 key = crc32(av[1], strlen(av[1])) & 0x7FFFFFFF;
 350                 if (key == 0)
 351                         ++key;
 352                 printf("0x%08x\n", key);
 353                 exit(0);
 354         }
 355         if (strcmp(av[0], "pfs-status") == 0) {
 356                 hammer_cmd_pseudofs_status(av + 1, ac - 1);
 357                 exit(0);
 358         }
 359         if (strcmp(av[0], "pfs-master") == 0) {
 360                 hammer_cmd_pseudofs_create(av + 1, ac - 1, 0);
 361                 exit(0);
 362         }
 363         if (strcmp(av[0], "pfs-slave") == 0) {
 364                 hammer_cmd_pseudofs_create(av + 1, ac - 1, 1);
 365                 exit(0);
 366         }
 367         if (strcmp(av[0], "pfs-update") == 0) {
 368                 hammer_cmd_pseudofs_update(av + 1, ac - 1);
 369                 exit(0);
 370         }
 371         if (strcmp(av[0], "pfs-upgrade") == 0) {
 372                 hammer_cmd_pseudofs_upgrade(av + 1, ac - 1);
 373                 exit(0);
 374         }
 375         if (strcmp(av[0], "pfs-downgrade") == 0) {
 376                 hammer_cmd_pseudofs_downgrade(av + 1, ac - 1);
 377                 exit(0);
 378         }
 379         if (strcmp(av[0], "pfs-destroy") == 0) {
 380                 hammer_cmd_pseudofs_destroy(av + 1, ac - 1);
 381                 exit(0);
 382         }
 383         if (strcmp(av[0], "status") == 0) {
 384                 hammer_cmd_status(av + 1, ac - 1);
 385                 exit(0);
 386         }
 387         if (strcmp(av[0], "prune") == 0) {
 388                 hammer_cmd_softprune(av + 1, ac - 1, 0);
 389                 exit(0);
 390         }
 391         if (strcmp(av[0], "config") == 0) {
 392                 hammer_cmd_config(av + 1, ac - 1);
 393                 exit(0);
 394         }
 395         if (strcmp(av[0], "viconfig") == 0) {
 396                 hammer_cmd_viconfig(av + 1, ac - 1);
 397                 exit(0);
 398         }
 399         if (strcmp(av[0], "cleanup") == 0) {
 400                 hammer_cmd_cleanup(av + 1, ac - 1);
 401                 exit(0);
 402         }
 403         if (strcmp(av[0], "info") == 0) {
 404                 hammer_cmd_info();
 405                 exit(0);
 406         }
 407         if (strcmp(av[0], "prune-everything") == 0) {
 408                 hammer_cmd_softprune(av + 1, ac - 1, 1);
 409                 exit(0);
 410         }
 411         if (strcmp(av[0], "ssh-remote") == 0) {
 412                 if (ac != 3)
 413                         usage(1);
 414                 hammer_cmd_sshremote(av[1], av[2]);
 415                 exit(0);
 416         }
 417         if (strcmp(av[0], "snap") == 0) {
 418                 hammer_cmd_snap(av + 1, ac - 1, 0, 1);
 419                 exit(0);
 420         }
 421         if (strcmp(av[0], "snaplo") == 0) {
 422                 hammer_cmd_snap(av + 1, ac - 1, 0, 0);
 423                 exit(0);
 424         }
 425         if (strcmp(av[0], "snapq") == 0) {
 426                 hammer_cmd_snap(av + 1, ac - 1, 1, 0);
 427                 exit(0);
 428         }
 429         if (strcmp(av[0], "snapls") == 0) {
 430                 hammer_cmd_snapls(av + 1, ac - 1);
 431                 exit(0);
 432         }
 433         if (strcmp(av[0], "snaprm") == 0) {
 434                 hammer_cmd_snaprm(av + 1, ac - 1);
 435                 exit(0);
 436         }
 437         if (strcmp(av[0], "snapshot") == 0) {
 438                 hammer_cmd_snapshot(av + 1, ac - 1);
 439                 exit(0);
 440         }
 441         if (strcmp(av[0], "bstats") == 0) {
 442                 hammer_cmd_bstats(av + 1, ac - 1);
 443                 exit(0);
 444         }
 445         if (strcmp(av[0], "iostats") == 0) {
 446                 hammer_cmd_iostats(av + 1, ac - 1);
 447                 exit(0);
 448         }
 449
 450         if (strncmp(av[0], "history", 7) == 0) {
 451                 hammer_cmd_history(av[0] + 7, av + 1, ac - 1);
 452                 exit(0);
 453         }
 454         if (strcmp(av[0], "rebalance") == 0) {
 455                 signal(SIGINT, sigalrm);
 456                 hammer_cmd_rebalance(av + 1, ac - 1);
 457                 exit(0);
 458         }
 459         if (strncmp(av[0], "reblock", 7) == 0) {
 460                 signal(SIGINT, sigalrm);
 461                 if (strcmp(av[0], "reblock") == 0)
 462                         hammer_cmd_reblock(av + 1, ac - 1, -1);
 463                 else if (strcmp(av[0], "reblock-btree") == 0)
 464                         hammer_cmd_reblock(av + 1, ac - 1, HAMMER_IOC_DO_BTREE);
 465                 else if (strcmp(av[0], "reblock-inodes") == 0)
 466                         hammer_cmd_reblock(av + 1, ac - 1, HAMMER_IOC_DO_INODES);
 467                 else if (strcmp(av[0], "reblock-dirs") == 0)
 468                         hammer_cmd_reblock(av + 1, ac - 1, HAMMER_IOC_DO_DIRS);
 469                 else if (strcmp(av[0], "reblock-data") == 0)
 470                         hammer_cmd_reblock(av + 1, ac - 1, HAMMER_IOC_DO_DATA);
 471                 else
 472                         usage(1);
 473                 exit(0);
 474         }
 475         if (strncmp(av[0], "mirror", 6) == 0) {
 476                 if (strcmp(av[0], "mirror-read") == 0)
 477                         hammer_cmd_mirror_read(av + 1, ac - 1, 0);
 478                 else if (strcmp(av[0], "mirror-read-stream") == 0)
 479                         hammer_cmd_mirror_read(av + 1, ac - 1, 1);
 480                 else if (strcmp(av[0], "mirror-write") == 0)
 481                         hammer_cmd_mirror_write(av + 1, ac - 1);
 482                 else if (strcmp(av[0], "mirror-copy") == 0)
 483                         hammer_cmd_mirror_copy(av + 1, ac - 1, 0);
 484                 else if (strcmp(av[0], "mirror-stream") == 0)
 485                         hammer_cmd_mirror_copy(av + 1, ac - 1, 1);
 486                 else if (strcmp(av[0], "mirror-dump") == 0)
 487                         hammer_cmd_mirror_dump();
 488                 else
 489                         usage(1);
 490                 exit(0);
 491         }
 492         if (strcmp(av[0], "dedup-simulate") == 0) {
 493                 hammer_cmd_dedup_simulate(av + 1, ac - 1);
 494                 exit(0);
 495         }
 496         if (strcmp(av[0], "dedup") == 0) {
 497                 hammer_cmd_dedup(av + 1, ac - 1);
 498                 exit(0);
 499         }
 500         if (strcmp(av[0], "version") == 0) {
 501                 hammer_cmd_get_version(av + 1, ac - 1);
 502                 exit(0);
 503         }
 504         if (strcmp(av[0], "version-upgrade") == 0) {
 505                 hammer_cmd_set_version(av + 1, ac - 1);
 506                 exit(0);
 507         }
 508         if (strcmp(av[0], "volume-add") == 0) {
 509                 hammer_cmd_volume_add(av + 1, ac - 1);
 510                 exit(0);
 511         }
 512         if (strcmp(av[0], "volume-del") == 0) {
 513                 hammer_cmd_volume_del(av + 1, ac - 1);
 514                 exit(0);
 515         }
 516         if (strcmp(av[0], "volume-list") == 0) {
 517                 hammer_cmd_volume_list(av + 1, ac - 1);
 518                 exit(0);
 519         }
 520
 521         uuid_name_lookup(&Hammer_FSType, "DragonFly HAMMER", &status);
 522         if (status != uuid_s_ok) {
 523                 errx(1, "uuids file does not have the DragonFly "
 524                         "HAMMER filesystem type");
 525         }
 526
 527         if (strcmp(av[0], "show") == 0) {
 528                 u_int32_t lo = 0;
 529                 intmax_t obj_id = (int64_t)HAMMER_MIN_OBJID;
 530
 531                 hammer_parsedevs(blkdevs);
 532                 if (ac > 1)
 533                         sscanf(av[1], "%08x:%jx", &lo, &obj_id);
 534                 hammer_cmd_show(-1, lo, (int64_t)obj_id, 0, NULL, NULL);
 535                 exit(0);
 536         }
 537         if (strcmp(av[0], "show-undo") == 0) {
 538                 hammer_parsedevs(blkdevs);
 539                 hammer_cmd_show_undo();
 540                 exit(0);
 541         }
 542         if (strcmp(av[0], "recover") == 0) {
 543                 hammer_parsedevs(blkdevs);
 544                 if (ac <= 1)
 545                         errx(1, "hammer recover required target directory");
 546                 hammer_cmd_recover(av[1]);
 547                 exit(0);
 548         }
 549         if (strcmp(av[0], "blockmap") == 0) {
 550                 hammer_parsedevs(blkdevs);
 551                 hammer_cmd_blockmap();
 552                 exit(0);
 553         }
 554         if (strcmp(av[0], "checkmap") == 0) {
 555                 hammer_parsedevs(blkdevs);
 556                 hammer_cmd_checkmap();
 557                 exit(0);
 558         }
 559         usage(1);
 560         /* not reached */
 561         return(0);
 562 }
 563
 564 /*
 565  * Parse the device specification.
 566  *
 567  * Multi-volume hammer devices are colon-separated.  Each element
 568  * may be further expanded via /etc/devtab.  One may also specify
 569  * a single element which is expanded into multiple elements via
 570  * /etc/devtab.
 571  */
 572 static
 573 void
 574 hammer_parsedevs(const char *blkdevs)
 575 {
 576         char *copy;
 577         char *volname;
 578
 579         if (blkdevs == NULL) {
 580                 errx(1, "A -f blkdevs specification is required "
 581                         "for this command");
 582         }
 583
 584         copy = strdup(blkdevs);
 585         while ((volname = copy) != NULL) {
 586                 if ((copy = strchr(copy, ':')) != NULL)
 587                         *copy++ = 0;
 588                 volname = getdevpath(volname, 0);
 589                 if (strchr(volname, ':'))
 590                         hammer_parsedevs(volname);
 591                 else
 592                         setup_volume(-1, volname, 0, O_RDONLY);
 593         }
 594 }
 595
 596 static
 597 void
 598 sigalrm(int signo __unused)
 599 {
 600         /* do nothing (interrupts HAMMER ioctl) */
 601 }
 602
 603 static
 604 void
 605 sigintr(int signo __unused)
 606 {
 607         if (RunningIoctl == 0)
 608                 _exit(1);
 609         DidInterrupt = 1;
 610         /* do nothing (interrupts HAMMER ioctl) */
 611 }
 612
 613 static
 614 void
 615 usage(int exit_code)
 616 {
 617         fprintf(stderr,
 618                 "hammer -h\n"
 619                 "hammer [-2BqrvXy] [-b bandwidth] [-C cachesize[:readahead]] [-c cyclefile]\n"
 620                 "       [-f blkdevs] [-i delay] [-t seconds] [-S splitup]\n"
 621                 "       command [argument ...]\n"
 622                 "hammer synctid <filesystem> [quick]\n"
 623                 "hammer bstats [interval]\n"
 624                 "hammer iostats [interval]\n"
 625                 "hammer history[@offset[,len]] <file> ...\n"
 626                 "hammer namekey1 <path>\n"
 627                 "hammer namekey2 <path>\n"
 628                 "hammer namekey32 <path>\n"
 629                 "hammer cleanup [<filesystem> ...]\n"
 630                 "hammer info\n"
 631                 "hammer snapshot [<filesystem>] <snapshot-dir>\n"
 632                 "hammer snapshot <filesystem> <snapshot-dir> [<note>]\n"
 633                 "hammer prune <softlink-dir>\n"
 634                 "hammer prune-everything <filesystem>\n"
 635                 "hammer rebalance <filesystem> [saturation_percentage]\n"
 636                 "hammer reblock[-btree|-inodes|-dirs|-data] "
 637                         "<filesystem> [fill_percentage]\n"
 638                 "hammer pfs-status <dirpath> ...\n"
 639                 "hammer pfs-master <dirpath> [options]\n"
 640                 "hammer pfs-slave <dirpath> [options]\n"
 641                 "hammer pfs-update <dirpath> [options]\n"
 642                 "hammer pfs-upgrade <dirpath>\n"
 643                 "hammer pfs-downgrade <dirpath>\n"
 644                 "hammer pfs-destroy <dirpath>\n"
 645                 "hammer mirror-read <filesystem> [begin-tid]\n"
 646                 "hammer mirror-read-stream <filesystem> [begin-tid]\n"
 647                 "hammer mirror-write <filesystem>\n"
 648                 "hammer mirror-dump\n"
 649                 "hammer mirror-copy [[user@]host:]<filesystem>"
 650                                   " [[user@]host:]<filesystem>\n"
 651                 "hammer mirror-stream [[user@]host:]<filesystem>"
 652                                     " [[user@]host:]<filesystem>\n"
 653                 "hammer ssh-remote command filesystem\n"
 654                 "hammer version <filesystem>\n"
 655                 "hammer version-upgrade <filesystem> <version> [force]\n"
 656                 "hammer volume-add <device> <filesystem>\n"
 657                 "hammer volume-del <device> <filesystem>\n"
 658                 "hammer volume-list <filesystem>\n"
 659         );
 660
 661         fprintf(stderr, "\nHAMMER utility version 3+ commands:\n");
 662
 663         fprintf(stderr,
 664                 "hammer config [<filesystem> [<configfile>]]\n"
 665                 "hammer viconfig [<filesystem>]\n"
 666                 "hammer snap <path> [<note>]\n"
 667                 "hammer snaplo <path> [<note>]\n"
 668                 "hammer snapq <dir> [<note>]\n"
 669                 "hammer snaprm <path> ...\n"
 670                 "hammer snaprm <transid> ...\n"
 671                 "hammer snaprm <filesystem> <transid> ...\n"
 672                 "hammer snapls [<path> ...]\n"
 673         );
 674
 675         fprintf(stderr, "\nHAMMER utility version 4+ commands:\n");
 676
 677         fprintf(stderr,
 678                 "hammer -f blkdevs blockmap\n"
 679                 "hammer -f blkdevs checkmap\n"
 680                 "hammer -f blkdevs [-qqq] show [lo:objid]\n"
 681                 "hammer -f blkdevs show-undo\n"
 682                 "hammer -f blkdevs recover <target_dir>\n"
 683         );
 684
 685         fprintf(stderr, "\nHAMMER utility version 5+ commands:\n");
 686
 687         fprintf(stderr,
 688                 "hammer dedup-simulate <filesystem>\n"
 689                 "hammer dedup <filesystem>\n"
 690         );
 691
 692         exit(exit_code);
 693 }
 694