mdadm.c

   1 /*
   2  * mdadm - manage Linux "md" devices aka RAID arrays.
   3  *
   4  * Copyright (C) 2001-2009 Neil Brown <neilb@suse.de>
   5  *
   6  *
   7  *    This program is free software; you can redistribute it and/or modify
   8  *    it under the terms of the GNU General Public License as published by
   9  *    the Free Software Foundation; either version 2 of the License, or
  10  *    (at your option) any later version.
  11  *
  12  *    This program is distributed in the hope that it will be useful,
  13  *    but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  *    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15  *    GNU General Public License for more details.
  16  *
  17  *    You should have received a copy of the GNU General Public License
  18  *    along with this program; if not, write to the Free Software
  19  *    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  20  *
  21  *    Author: Neil Brown
  22  *    Email: <neilb@suse.de>
  23  *
  24  *    Additions for bitmap and write-behind RAID options, Copyright (C) 2003-2004,
  25  *    Paul Clements, SteelEye Technology, Inc.
  26  */
  27
  28 #include "mdadm.h"
  29 #include "md_p.h"
  30 #include <ctype.h>
  31
  32
  33 int main(int argc, char *argv[])
  34 {
  35         int mode = 0;
  36         int opt;
  37         int option_index;
  38         char *c;
  39         int rv;
  40         int i;
  41
  42         int chunk = 0;
  43         long long size = -1;
  44         long long array_size = -1;
  45         int level = UnSet;
  46         int layout = UnSet;
  47         char *layout_str = NULL;
  48         int raiddisks = 0;
  49         int max_disks = MD_SB_DISKS; /* just a default */
  50         int sparedisks = 0;
  51         struct mddev_ident_s ident;
  52         char *configfile = NULL;
  53         char *cp;
  54         char *update = NULL;
  55         int scan = 0;
  56         char devmode = 0;
  57         int runstop = 0;
  58         int readonly = 0;
  59         int write_behind = 0;
  60         int bitmap_fd = -1;
  61         char *bitmap_file = NULL;
  62         char *backup_file = NULL;
  63         int bitmap_chunk = UnSet;
  64         int SparcAdjust = 0;
  65         mddev_dev_t devlist = NULL;
  66         mddev_dev_t *devlistend = & devlist;
  67         mddev_dev_t dv;
  68         int devs_found = 0;
  69         int verbose = 0;
  70         int quiet = 0;
  71         int brief = 0;
  72         int force = 0;
  73         int test = 0;
  74         int export = 0;
  75         int assume_clean = 0;
  76         char *symlinks = NULL;
  77         /* autof indicates whether and how to create device node.
  78          * bottom 3 bits are style.  Rest (when shifted) are number of parts
  79          * 0  - unset
  80          * 1  - don't create (no)
  81          * 2  - if is_standard, then create (yes)
  82          * 3  - create as 'md' - reject is_standard mdp (md)
  83          * 4  - create as 'mdp' - reject is_standard md (mdp)
  84          * 5  - default to md if not is_standard (md in config file)
  85          * 6  - default to mdp if not is_standard (part, or mdp in config file)
  86          */
  87         int autof = 0;
  88
  89         char *homehost = NULL;
  90         char sys_hostname[256];
  91         int require_homehost = 1;
  92         char *mailaddr = NULL;
  93         char *program = NULL;
  94         int increments = 20;
  95         int delay = 0;
  96         int daemonise = 0;
  97         char *pidfile = NULL;
  98         int oneshot = 0;
  99         struct supertype *ss = NULL;
 100         int writemostly = 0;
 101         int re_add = 0;
 102         char *shortopt = short_options;
 103         int dosyslog = 0;
 104         int rebuild_map = 0;
 105         int auto_update_home = 0;
 106         char *subarray = NULL;
 107
 108         int print_help = 0;
 109         FILE *outf;
 110
 111         int mdfd = -1;
 112
 113         srandom(time(0) ^ getpid());
 114
 115         ident.uuid_set=0;
 116         ident.level = UnSet;
 117         ident.raid_disks = UnSet;
 118         ident.super_minor= UnSet;
 119         ident.devices=0;
 120         ident.spare_group = NULL;
 121         ident.autof = 0;
 122         ident.st = NULL;
 123         ident.bitmap_fd = -1;
 124         ident.bitmap_file = NULL;
 125         ident.name[0] = 0;
 126         ident.container = NULL;
 127         ident.member = NULL;
 128
 129         while ((option_index = -1) ,
 130                (opt=getopt_long(argc, argv,
 131                                 shortopt, long_options,
 132                                 &option_index)) != -1) {
 133                 int newmode = mode;
 134                 /* firstly, some mode-independent options */
 135                 switch(opt) {
 136                 case 'h':
 137                         if (option_index > 0 &&
 138                             strcmp(long_options[option_index].name, "help-options")==0)
 139                                 print_help = 2;
 140                         else
 141                                 print_help = 1;
 142                         continue;
 143
 144                 case 'V':
 145                         fputs(Version, stderr);
 146                         exit(0);
 147
 148                 case 'v': verbose++;
 149                         continue;
 150
 151                 case 'q': quiet++;
 152                         continue;
 153
 154                 case 'b':
 155                         if (mode == ASSEMBLE || mode == BUILD || mode == CREATE || mode == GROW ||
 156                             mode == INCREMENTAL || mode == MANAGE)
 157                                 break; /* b means bitmap */
 158                         brief = 1;
 159                         continue;
 160
 161                 case 'Y': export++;
 162                         continue;
 163
 164                 case HomeHost:
 165                         if (strcasecmp(optarg, "<ignore>") == 0)
 166                                 require_homehost = 0;
 167                         else
 168                                 homehost = optarg;
 169                         continue;
 170
 171                 case ':':
 172                 case '?':
 173                         fputs(Usage, stderr);
 174                         exit(2);
 175                 }
 176                 /* second, figure out the mode.
 177                  * Some options force the mode.  Others
 178                  * set the mode if it isn't already
 179                  */
 180
 181                 switch(opt) {
 182                 case '@': /* just incase they say --manage */
 183                         newmode = MANAGE;
 184                         shortopt = short_bitmap_options;
 185                         break;
 186                 case 'a':
 187                 case 'r':
 188                 case 'f':
 189                 case ReAdd: /* re-add */
 190                         if (!mode) {
 191                                 newmode = MANAGE;
 192                                 shortopt = short_bitmap_options;
 193                         }
 194                         break;
 195
 196                 case 'A': newmode = ASSEMBLE; shortopt = short_bitmap_auto_options; break;
 197                 case 'B': newmode = BUILD; shortopt = short_bitmap_auto_options; break;
 198                 case 'C': newmode = CREATE; shortopt = short_bitmap_auto_options; break;
 199                 case 'F': newmode = MONITOR;break;
 200                 case 'G': newmode = GROW;
 201                         shortopt = short_bitmap_options;
 202                         break;
 203                 case 'I': newmode = INCREMENTAL;
 204                         shortopt = short_bitmap_auto_options; break;
 205                 case AutoDetect:
 206                         newmode = AUTODETECT; break;
 207
 208                 case '#':
 209                 case 'D':
 210                 case 'E':
 211                 case 'X':
 212                 case 'Q': newmode = MISC; break;
 213                 case 'R':
 214                 case 'S':
 215                 case 'o':
 216                 case 'w':
 217                 case 'W':
 218                 case Waitclean:
 219                 case DetailPlatform:
 220                 case KillSubarray:
 221                 case UpdateSubarray:
 222                         if (opt == KillSubarray || opt == UpdateSubarray) {
 223                                 if (subarray) {
 224                                         fprintf(stderr, Name ": subarray can only be specified once\n");
 225                                         exit(2);
 226                                 }
 227                                 subarray = optarg;
 228                         }
 229                 case 'K': if (!mode) newmode = MISC; break;
 230                 }
 231                 if (mode && newmode == mode) {
 232                         /* everybody happy ! */
 233                 } else if (mode && newmode != mode) {
 234                         /* not allowed.. */
 235                         fprintf(stderr, Name ": ");
 236                         if (option_index >= 0)
 237                                 fprintf(stderr, "--%s", long_options[option_index].name);
 238                         else
 239                                 fprintf(stderr, "-%c", opt);
 240                         fprintf(stderr, " would set mdadm mode to \"%s\", but it is already set to \"%s\".\n",
 241                                 map_num(modes, newmode),
 242                                 map_num(modes, mode));
 243                         exit(2);
 244                 } else if (!mode && newmode) {
 245                         mode = newmode;
 246                 } else {
 247                         /* special case of -c --help */
 248                         if (opt == 'c' &&
 249                             ( strncmp(optarg, "--h", 3)==0 ||
 250                               strncmp(optarg, "-h", 2)==0)) {
 251                                 fputs(Help_config, stdout);
 252                                 exit(0);
 253                         }
 254
 255                         /* If first option is a device, don't force the mode yet */
 256                         if (opt == 1) {
 257                                 if (devs_found == 0) {
 258                                         dv = malloc(sizeof(*dv));
 259                                         if (dv == NULL) {
 260                                                 fprintf(stderr, Name ": malloc failed\n");
 261                                                 exit(3);
 262                                         }
 263                                         dv->devname = optarg;
 264                                         dv->disposition = devmode;
 265                                         dv->writemostly = writemostly;
 266                                         dv->re_add = re_add;
 267                                         dv->used = 0;
 268                                         dv->content = NULL;
 269                                         dv->next = NULL;
 270                                         *devlistend = dv;
 271                                         devlistend = &dv->next;
 272
 273                                         devs_found++;
 274                                         continue;
 275                                 }
 276                                 /* No mode yet, and this is the second device ... */
 277                                 fprintf(stderr, Name ": An option must be given to set the mode before a second device\n"
 278                                         "       (%s) is listed\n", optarg);
 279                                 exit(2);
 280                         }
 281                         if (option_index >= 0)
 282                                 fprintf(stderr, Name ": --%s", long_options[option_index].name);
 283                         else
 284                                 fprintf(stderr, Name ": -%c", opt);
 285                         fprintf(stderr, " does not set the mode, and so cannot be the first option.\n");
 286                         exit(2);
 287                 }
 288
 289                 /* if we just set the mode, then done */
 290                 switch(opt) {
 291                 case '@':
 292                 case '#':
 293                 case 'A':
 294                 case 'B':
 295                 case 'C':
 296                 case 'F':
 297                 case 'G':
 298                 case 'I':
 299                 case AutoDetect:
 300                         continue;
 301                 }
 302                 if (opt == 1) {
 303                         /* an undecorated option - must be a device name.
 304                          */
 305                         if (devs_found > 0 && mode == '@' && !devmode) {
 306                                 fprintf(stderr, Name ": Must give one of -a/-r/-f for subsequent devices at %s\n", optarg);
 307                                 exit(2);
 308                         }
 309                         if (devs_found > 0 && mode == 'G' && !devmode) {
 310                                 fprintf(stderr, Name ": Must give one of -a for devices do add: %s\n", optarg);
 311                                 exit(2);
 312                         }
 313                         dv = malloc(sizeof(*dv));
 314                         if (dv == NULL) {
 315                                 fprintf(stderr, Name ": malloc failed\n");
 316                                 exit(3);
 317                         }
 318                         dv->devname = optarg;
 319                         dv->disposition = devmode;
 320                         dv->writemostly = writemostly;
 321                         dv->re_add = re_add;
 322                         dv->used = 0;
 323                         dv->content = NULL;
 324                         dv->next = NULL;
 325                         *devlistend = dv;
 326                         devlistend = &dv->next;
 327
 328                         devs_found++;
 329                         continue;
 330                 }
 331
 332                 /* We've got a mode, and opt is now something else which
 333                  * could depend on the mode */
 334 #define O(a,b) ((a<<8)|b)
 335                 switch (O(mode,opt)) {
 336                 case O(GROW,'c'):
 337                 case O(CREATE,'c'):
 338                 case O(BUILD,'c'): /* chunk or rounding */
 339                         if (chunk) {
 340                                 fprintf(stderr, Name ": chunk/rounding may only be specified once. "
 341                                         "Second value is %s.\n", optarg);
 342                                 exit(2);
 343                         }
 344                         chunk = strtol(optarg, &c, 10);
 345                         if (!optarg[0] || *c || chunk<4 || ((chunk-1)&chunk)) {
 346                                 fprintf(stderr, Name ": invalid chunk/rounding value: %s\n",
 347                                         optarg);
 348                                 exit(2);
 349                         }
 350                         continue;
 351
 352 #if 0
 353                 case O(ASSEMBLE,AutoHomeHost):
 354                         auto_update_home = 1;
 355                         continue;
 356 #endif
 357                 case O(INCREMENTAL, 'e'):
 358                 case O(CREATE,'e'):
 359                 case O(ASSEMBLE,'e'):
 360                 case O(MISC,'e'): /* set metadata (superblock) information */
 361                         if (ss) {
 362                                 fprintf(stderr, Name ": metadata information already given\n");
 363                                 exit(2);
 364                         }
 365                         for(i=0; !ss && superlist[i]; i++)
 366                                 ss = superlist[i]->match_metadata_desc(optarg);
 367
 368                         if (!ss) {
 369                                 fprintf(stderr, Name ": unrecognised metadata identifier: %s\n", optarg);
 370                                 exit(2);
 371                         }
 372                         max_disks = ss->max_devs;
 373                         continue;
 374
 375                 case O(MANAGE,'W'):
 376                 case O(BUILD,'W'):
 377                 case O(CREATE,'W'):
 378                         /* set write-mostly for following devices */
 379                         writemostly = 1;
 380                         continue;
 381
 382                 case O(MANAGE,'w'):
 383                         /* clear write-mostly for following devices */
 384                         writemostly = 2;
 385                         continue;
 386
 387
 388                 case O(GROW,'z'):
 389                 case O(CREATE,'z'):
 390                 case O(BUILD,'z'): /* size */
 391                         if (size >= 0) {
 392                                 fprintf(stderr, Name ": size may only be specified once. "
 393                                         "Second value is %s.\n", optarg);
 394                                 exit(2);
 395                         }
 396                         if (strcmp(optarg, "max")==0)
 397                                 size = 0;
 398                         else {
 399                                 size = parse_size(optarg);
 400                                 if (size < 8) {
 401                                         fprintf(stderr, Name ": invalid size: %s\n",
 402                                                 optarg);
 403                                         exit(2);
 404                                 }
 405                                 /* convert sectors to K */
 406                                 size /= 2;
 407                         }
 408                         continue;
 409
 410                 case O(GROW,'Z'): /* array size */
 411                         if (array_size >= 0) {
 412                                 fprintf(stderr, Name ": array-size may only be specified once. "
 413                                         "Second value is %s.\n", optarg);
 414                                 exit(2);
 415                         }
 416                         if (strcmp(optarg, "max") == 0)
 417                                 array_size = 0;
 418                         else {
 419                                 array_size = parse_size(optarg);
 420                                 if (array_size <= 0) {
 421                                         fprintf(stderr, Name ": invalid array size: %s\n",
 422                                                 optarg);
 423                                         exit(2);
 424                                 }
 425                         }
 426                         continue;
 427
 428                 case O(GROW,'l'):
 429                 case O(CREATE,'l'):
 430                 case O(BUILD,'l'): /* set raid level*/
 431                         if (level != UnSet) {
 432                                 fprintf(stderr, Name ": raid level may only be set once.  "
 433                                         "Second value is %s.\n", optarg);
 434                                 exit(2);
 435                         }
 436                         level = map_name(pers, optarg);
 437                         if (level == UnSet) {
 438                                 fprintf(stderr, Name ": invalid raid level: %s\n",
 439                                         optarg);
 440                                 exit(2);
 441                         }
 442                         if (level != 0 && level != LEVEL_LINEAR && level != 1 &&
 443                             level != LEVEL_MULTIPATH && level != LEVEL_FAULTY &&
 444                             level != 10 &&
 445                             mode == BUILD) {
 446                                 fprintf(stderr, Name ": Raid level %s not permitted with --build.\n",
 447                                         optarg);
 448                                 exit(2);
 449                         }
 450                         if (sparedisks > 0 && level < 1 && level >= -1) {
 451                                 fprintf(stderr, Name ": raid level %s is incompatible with spare-devices setting.\n",
 452                                         optarg);
 453                                 exit(2);
 454                         }
 455                         ident.level = level;
 456                         continue;
 457
 458                 case O(GROW, 'p'): /* new layout */
 459                         if (layout_str) {
 460                                 fprintf(stderr,Name ": layout may only be sent once.  "
 461                                         "Second value was %s\n", optarg);
 462                                 exit(2);
 463                         }
 464                         layout_str = optarg;
 465                         /* 'Grow' will parse the value */
 466                         continue;
 467
 468                 case O(CREATE,'p'): /* raid5 layout */
 469                 case O(BUILD,'p'): /* faulty layout */
 470                         if (layout != UnSet) {
 471                                 fprintf(stderr,Name ": layout may only be sent once.  "
 472                                         "Second value was %s\n", optarg);
 473                                 exit(2);
 474                         }
 475                         switch(level) {
 476                         default:
 477                                 fprintf(stderr, Name ": layout not meaningful for %s arrays.\n",
 478                                         map_num(pers, level));
 479                                 exit(2);
 480                         case UnSet:
 481                                 fprintf(stderr, Name ": raid level must be given before layout.\n");
 482                                 exit(2);
 483
 484                         case 5:
 485                                 layout = map_name(r5layout, optarg);
 486                                 if (layout==UnSet) {
 487                                         fprintf(stderr, Name ": layout %s not understood for raid5.\n",
 488                                                 optarg);
 489                                         exit(2);
 490                                 }
 491                                 break;
 492                         case 6:
 493                                 layout = map_name(r6layout, optarg);
 494                                 if (layout==UnSet) {
 495                                         fprintf(stderr, Name ": layout %s not understood for raid6.\n",
 496                                                 optarg);
 497                                         exit(2);
 498                                 }
 499                                 break;
 500
 501                         case 10:
 502                                 layout = parse_layout_10(optarg);
 503                                 if (layout < 0) {
 504                                         fprintf(stderr, Name ": layout for raid10 must be 'nNN', 'oNN' or 'fNN' where NN is a number, not %s\n", optarg);
 505                                         exit(2);
 506                                 }
 507                                 break;
 508                         case LEVEL_FAULTY:
 509                                 /* Faulty
 510                                  * modeNNN
 511                                  */
 512                                 layout = parse_layout_faulty(optarg);
 513                                 if (layout == -1) {
 514                                         fprintf(stderr, Name ": layout %s not understood for faulty.\n",
 515                                                 optarg);
 516                                         exit(2);
 517                                 }
 518                                 break;
 519                         }
 520                         continue;
 521
 522                 case O(CREATE,AssumeClean):
 523                 case O(BUILD,AssumeClean): /* assume clean */
 524                         assume_clean = 1;
 525                         continue;
 526
 527                 case O(GROW,'n'):
 528                 case O(CREATE,'n'):
 529                 case O(BUILD,'n'): /* number of raid disks */
 530                         if (raiddisks) {
 531                                 fprintf(stderr, Name ": raid-devices set twice: %d and %s\n",
 532                                         raiddisks, optarg);
 533                                 exit(2);
 534                         }
 535                         raiddisks = strtol(optarg, &c, 10);
 536                         if (!optarg[0] || *c || raiddisks<=0) {
 537                                 fprintf(stderr, Name ": invalid number of raid devices: %s\n",
 538                                         optarg);
 539                                 exit(2);
 540                         }
 541                         ident.raid_disks = raiddisks;
 542                         continue;
 543
 544                 case O(CREATE,'x'): /* number of spare (eXtra) discs */
 545                         if (sparedisks) {
 546                                 fprintf(stderr,Name ": spare-devices set twice: %d and %s\n",
 547                                         sparedisks, optarg);
 548                                 exit(2);
 549                         }
 550                         if (level != UnSet && level <= 0 && level >= -1) {
 551                                 fprintf(stderr, Name ": spare-devices setting is incompatible with raid level %d\n",
 552                                         level);
 553                                 exit(2);
 554                         }
 555                         sparedisks = strtol(optarg, &c, 10);
 556                         if (!optarg[0] || *c || sparedisks < 0) {
 557                                 fprintf(stderr, Name ": invalid number of spare-devices: %s\n",
 558                                         optarg);
 559                                 exit(2);
 560                         }
 561                         continue;
 562
 563                 case O(CREATE,'a'):
 564                 case O(BUILD,'a'):
 565                 case O(INCREMENTAL,'a'):
 566                 case O(ASSEMBLE,'a'): /* auto-creation of device node */
 567                         autof = parse_auto(optarg, "--auto flag", 0);
 568                         continue;
 569
 570                 case O(CREATE,Symlinks):
 571                 case O(BUILD,Symlinks):
 572                 case O(ASSEMBLE,Symlinks): /* auto creation of symlinks in /dev to /dev/md */
 573                         symlinks = optarg;
 574                         continue;
 575
 576                 case O(BUILD,'f'): /* force honouring '-n 1' */
 577                 case O(GROW,'f'): /* ditto */
 578                 case O(CREATE,'f'): /* force honouring of device list */
 579                 case O(ASSEMBLE,'f'): /* force assembly */
 580                 case O(MISC,'f'): /* force zero */
 581                         force=1;
 582                         continue;
 583
 584                         /* now for the Assemble options */
 585                 case O(CREATE,'u'): /* uuid of array */
 586                 case O(ASSEMBLE,'u'): /* uuid of array */
 587                         if (ident.uuid_set) {
 588                                 fprintf(stderr, Name ": uuid cannot be set twice.  "
 589                                         "Second value %s.\n", optarg);
 590                                 exit(2);
 591                         }
 592                         if (parse_uuid(optarg, ident.uuid))
 593                                 ident.uuid_set = 1;
 594                         else {
 595                                 fprintf(stderr,Name ": Bad uuid: %s\n", optarg);
 596                                 exit(2);
 597                         }
 598                         continue;
 599
 600                 case O(CREATE,'N'):
 601                 case O(ASSEMBLE,'N'):
 602                 case O(MISC,'N'):
 603                         if (ident.name[0]) {
 604                                 fprintf(stderr, Name ": name cannot be set twice.   "
 605                                         "Second value %s.\n", optarg);
 606                                 exit(2);
 607                         }
 608                         if (mode == MISC && !subarray) {
 609                                 fprintf(stderr, Name ": -N/--name only valid with --update-subarray in misc mode\n");
 610                                 exit(2);
 611                         }
 612                         if (strlen(optarg) > 32) {
 613                                 fprintf(stderr, Name ": name '%s' is too long, 32 chars max.\n",
 614                                         optarg);
 615                                 exit(2);
 616                         }
 617                         strcpy(ident.name, optarg);
 618                         continue;
 619
 620                 case O(ASSEMBLE,'m'): /* super-minor for array */
 621                         if (ident.super_minor != UnSet) {
 622                                 fprintf(stderr, Name ": super-minor cannot be set twice.  "
 623                                         "Second value: %s.\n", optarg);
 624                                 exit(2);
 625                         }
 626                         if (strcmp(optarg, "dev")==0)
 627                                 ident.super_minor = -2;
 628                         else {
 629                                 ident.super_minor = strtoul(optarg, &cp, 10);
 630                                 if (!optarg[0] || *cp) {
 631                                         fprintf(stderr, Name ": Bad super-minor number: %s.\n", optarg);
 632                                         exit(2);
 633                                 }
 634                         }
 635                         continue;
 636
 637                 case O(ASSEMBLE,'U'): /* update the superblock */
 638                 case O(MISC,'U'):
 639                         if (update) {
 640                                 fprintf(stderr, Name ": Can only update one aspect of superblock, both %s and %s given.\n",
 641                                         update, optarg);
 642                                 exit(2);
 643                         }
 644                         if (mode == MISC && !subarray) {
 645                                 fprintf(stderr, Name ": Only subarrays can be updated in misc mode\n");
 646                                 exit(2);
 647                         }
 648                         update = optarg;
 649                         if (strcmp(update, "sparc2.2")==0)
 650                                 continue;
 651                         if (strcmp(update, "super-minor") == 0)
 652                                 continue;
 653                         if (strcmp(update, "summaries")==0)
 654                                 continue;
 655                         if (strcmp(update, "resync")==0)
 656                                 continue;
 657                         if (strcmp(update, "uuid")==0)
 658                                 continue;
 659                         if (strcmp(update, "name")==0)
 660                                 continue;
 661                         if (strcmp(update, "homehost")==0)
 662                                 continue;
 663                         if (strcmp(update, "devicesize")==0)
 664                                 continue;
 665                         if (strcmp(update, "byteorder")==0) {
 666                                 if (ss) {
 667                                         fprintf(stderr, Name ": must not set metadata type with --update=byteorder.\n");
 668                                         exit(2);
 669                                 }
 670                                 for(i=0; !ss && superlist[i]; i++)
 671                                         ss = superlist[i]->match_metadata_desc("0.swap");
 672                                 if (!ss) {
 673                                         fprintf(stderr, Name ": INTERNAL ERROR cannot find 0.swap\n");
 674                                         exit(2);
 675                                 }
 676
 677                                 continue;
 678                         }
 679                         if (strcmp(update,"?") == 0 ||
 680                             strcmp(update, "help") == 0) {
 681                                 outf = stdout;
 682                                 fprintf(outf, Name ": ");
 683                         } else {
 684                                 outf = stderr;
 685                                 fprintf(outf,
 686                                         Name ": '--update=%s' is invalid.  ",
 687                                         update);
 688                         }
 689                         fprintf(outf, "Valid --update options are:\n"
 690                 "     'sparc2.2', 'super-minor', 'uuid', 'name', 'resync',\n"
 691                 "     'summaries', 'homehost', 'byteorder', 'devicesize'.\n");
 692                         exit(outf == stdout ? 0 : 2);
 693
 694                 case O(ASSEMBLE,NoDegraded): /* --no-degraded */
 695                         runstop = -1; /* --stop isn't allowed for --assemble,
 696                                        * so we overload slightly */
 697                         continue;
 698
 699                 case O(ASSEMBLE,'c'): /* config file */
 700                 case O(INCREMENTAL, 'c'):
 701                 case O(MISC, 'c'):
 702                 case O(MONITOR,'c'):
 703                         if (configfile) {
 704                                 fprintf(stderr, Name ": configfile cannot be set twice.  "
 705                                         "Second value is %s.\n", optarg);
 706                                 exit(2);
 707                         }
 708                         configfile = optarg;
 709                         set_conffile(configfile);
 710                         /* FIXME possibly check that config file exists.  Even parse it */
 711                         continue;
 712                 case O(ASSEMBLE,'s'): /* scan */
 713                 case O(MISC,'s'):
 714                 case O(MONITOR,'s'):
 715                 case O(INCREMENTAL,'s'):
 716                         scan = 1;
 717                         continue;
 718
 719                 case O(MONITOR,'m'): /* mail address */
 720                         if (mailaddr)
 721                                 fprintf(stderr, Name ": only specify one mailaddress. %s ignored.\n",
 722                                         optarg);
 723                         else
 724                                 mailaddr = optarg;
 725                         continue;
 726
 727                 case O(MONITOR,'p'): /* alert program */
 728                         if (program)
 729                                 fprintf(stderr, Name ": only specify one alter program. %s ignored.\n",
 730                                         optarg);
 731                         else
 732                                 program = optarg;
 733                         continue;
 734
 735                 case O(MONITOR,'r'): /* rebuild increments */
 736                         increments = atoi(optarg);
 737                         if (increments>99 || increments<1) {
 738                                 fprintf(stderr, Name ": please specify positive integer between 1 and 99 as rebuild increments.\n");
 739                                 exit(2);
 740                         }
 741                         continue;
 742
 743                 case O(MONITOR,'d'): /* delay in seconds */
 744                 case O(GROW, 'd'):
 745                 case O(BUILD,'d'): /* delay for bitmap updates */
 746                 case O(CREATE,'d'):
 747                         if (delay)
 748                                 fprintf(stderr, Name ": only specify delay once. %s ignored.\n",
 749                                         optarg);
 750                         else {
 751                                 delay = strtol(optarg, &c, 10);
 752                                 if (!optarg[0] || *c || delay<1) {
 753                                         fprintf(stderr, Name ": invalid delay: %s\n",
 754                                                 optarg);
 755                                         exit(2);
 756                                 }
 757                         }
 758                         continue;
 759                 case O(MONITOR,'f'): /* daemonise */
 760                         daemonise = 1;
 761                         continue;
 762                 case O(MONITOR,'i'): /* pid */
 763                         if (pidfile)
 764                                 fprintf(stderr, Name ": only specify one pid file. %s ignored.\n",
 765                                         optarg);
 766                         else
 767                                 pidfile = optarg;
 768                         continue;
 769                 case O(MONITOR,'1'): /* oneshot */
 770                         oneshot = 1;
 771                         continue;
 772                 case O(MONITOR,'t'): /* test */
 773                         test = 1;
 774                         continue;
 775                 case O(MONITOR,'y'): /* log messages to syslog */
 776                         openlog("mdadm", LOG_PID, SYSLOG_FACILITY);
 777                         dosyslog = 1;
 778                         continue;
 779
 780                         /* now the general management options.  Some are applicable
 781                          * to other modes. None have arguments.
 782                          */
 783                 case O(GROW,'a'):
 784                 case O(MANAGE,'a'): /* add a drive */
 785                         devmode = 'a';
 786                         re_add = 0;
 787                         continue;
 788                 case O(MANAGE,ReAdd):
 789                         devmode = 'a';
 790                         re_add = 1;
 791                         continue;
 792                 case O(MANAGE,'r'): /* remove a drive */
 793                         devmode = 'r';
 794                         continue;
 795                 case O(MANAGE,'f'): /* set faulty */
 796                 case O(INCREMENTAL,'f'): /* r for incremental is taken, use f
 797                                           * even though we will both fail and
 798                                           * remove the device */
 799                         devmode = 'f';
 800                         continue;
 801                 case O(INCREMENTAL,'R'):
 802                 case O(MANAGE,'R'):
 803                 case O(ASSEMBLE,'R'):
 804                 case O(BUILD,'R'):
 805                 case O(CREATE,'R'): /* Run the array */
 806                         if (runstop < 0) {
 807                                 fprintf(stderr, Name ": Cannot both Stop and Run an array\n");
 808                                 exit(2);
 809                         }
 810                         runstop = 1;
 811                         continue;
 812                 case O(MANAGE,'S'):
 813                         if (runstop > 0) {
 814                                 fprintf(stderr, Name ": Cannot both Run and Stop an array\n");
 815                                 exit(2);
 816                         }
 817                         runstop = -1;
 818                         continue;
 819                 case O(MANAGE,'t'):
 820                         test = 1;
 821                         continue;
 822
 823                 case O(MISC,'Q'):
 824                 case O(MISC,'D'):
 825                 case O(MISC,'E'):
 826                 case O(MISC,'K'):
 827                 case O(MISC,'R'):
 828                 case O(MISC,'S'):
 829                 case O(MISC,'X'):
 830                 case O(MISC,'o'):
 831                 case O(MISC,'w'):
 832                 case O(MISC,'W'):
 833                 case O(MISC, Waitclean):
 834                 case O(MISC, DetailPlatform):
 835                 case O(MISC, KillSubarray):
 836                 case O(MISC, UpdateSubarray):
 837                         if (devmode && devmode != opt &&
 838                             (devmode == 'E' || (opt == 'E' && devmode != 'Q'))) {
 839                                 fprintf(stderr, Name ": --examine/-E cannot be given with ");
 840                                 if (devmode == 'E') {
 841                                         if (option_index >= 0)
 842                                                 fprintf(stderr, "--%s\n",
 843                                                         long_options[option_index].name);
 844                                         else
 845                                                 fprintf(stderr, "-%c\n", opt);
 846                                 } else if (isalpha(devmode))
 847                                         fprintf(stderr, "-%c\n", devmode);
 848                                 else
 849                                         fprintf(stderr, "previous option\n");
 850                                 exit(2);
 851                         }
 852                         devmode = opt;
 853                         continue;
 854                 case O(MISC,'t'):
 855                         test = 1;
 856                         continue;
 857
 858                 case O(MISC, Sparc22):
 859                         if (devmode != 'E') {
 860                                 fprintf(stderr, Name ": --sparc2.2 only allowed with --examine\n");
 861                                 exit(2);
 862                         }
 863                         SparcAdjust = 1;
 864                         continue;
 865
 866                 case O(ASSEMBLE,'b'): /* here we simply set the bitmap file */
 867                         if (!optarg) {
 868                                 fprintf(stderr, Name ": bitmap file needed with -b in --assemble mode\n");
 869                                 exit(2);
 870                         }
 871                         if (strcmp(optarg, "internal")==0) {
 872                                 fprintf(stderr, Name ": there is no need to specify --bitmap when assembling arrays with internal bitmaps\n");
 873                                 continue;
 874                         }
 875                         bitmap_fd = open(optarg, O_RDWR);
 876                         if (!*optarg || bitmap_fd < 0) {
 877                                 fprintf(stderr, Name ": cannot open bitmap file %s: %s\n", optarg, strerror(errno));
 878                                 exit(2);
 879                         }
 880                         ident.bitmap_fd = bitmap_fd; /* for Assemble */
 881                         continue;
 882
 883                 case O(ASSEMBLE, BackupFile):
 884                 case O(GROW, BackupFile):
 885                         /* Specify a file into which grow might place a backup,
 886                          * or from which assemble might recover a backup
 887                          */
 888                         if (backup_file) {
 889                                 fprintf(stderr, Name ": backup file already specified, rejecting %s\n", optarg);
 890                                 exit(2);
 891                         }
 892                         backup_file = optarg;
 893                         continue;
 894
 895                 case O(BUILD,'b'):
 896                 case O(CREATE,'b'): /* here we create the bitmap */
 897                         if (strcmp(optarg, "none") == 0) {
 898                                 fprintf(stderr, Name ": '--bitmap none' only"
 899                                         " support for --grow\n");
 900                                 exit(2);
 901                         }
 902                         /* FALL THROUGH */
 903                 case O(GROW,'b'):
 904                         if (strcmp(optarg, "internal")== 0 ||
 905                             strcmp(optarg, "none")== 0 ||
 906                             strchr(optarg, '/') != NULL) {
 907                                 bitmap_file = optarg;
 908                                 continue;
 909                         }
 910                         /* probable typo */
 911                         fprintf(stderr, Name ": bitmap file must contain a '/', or be 'internal', or 'none'\n"
 912                                 "       not '%s'\n", optarg);
 913                         exit(2);
 914
 915                 case O(GROW,BitmapChunk):
 916                 case O(BUILD,BitmapChunk):
 917                 case O(CREATE,BitmapChunk): /* bitmap chunksize */
 918                         bitmap_chunk = strtol(optarg, &c, 10);
 919                         if (!optarg[0] || *c || bitmap_chunk < 0 ||
 920                                         bitmap_chunk & (bitmap_chunk - 1)) {
 921                                 fprintf(stderr, Name ": invalid bitmap chunksize: %s\n",
 922                                                 optarg);
 923                                 exit(2);
 924                         }
 925                         /* convert K to B, chunk of 0K means 512B */
 926                         bitmap_chunk = bitmap_chunk ? bitmap_chunk * 1024 : 512;
 927                         continue;
 928
 929                 case O(GROW, WriteBehind):
 930                 case O(BUILD, WriteBehind):
 931                 case O(CREATE, WriteBehind): /* write-behind mode */
 932                         write_behind = DEFAULT_MAX_WRITE_BEHIND;
 933                         if (optarg) {
 934                                 write_behind = strtol(optarg, &c, 10);
 935                                 if (write_behind < 0 || *c ||
 936                                     write_behind > 16383) {
 937                                         fprintf(stderr, Name ": Invalid value for maximum outstanding write-behind writes: %s.\n\tMust be between 0 and 16383.\n", optarg);
 938                                         exit(2);
 939                                 }
 940                         }
 941                         continue;
 942
 943                 case O(INCREMENTAL, 'r'):
 944                         rebuild_map = 1;
 945                         continue;
 946                 }
 947                 /* We have now processed all the valid options. Anything else is
 948                  * an error
 949                  */
 950                 if (option_index > 0)
 951                         fprintf(stderr, Name ":option --%s not valid in %s mode\n",
 952                                 long_options[option_index].name,
 953                                 map_num(modes, mode));
 954                 else
 955                         fprintf(stderr, Name ": option -%c not valid in %s mode\n",
 956                                 opt, map_num(modes, mode));
 957                 exit(2);
 958
 959         }
 960
 961         if (print_help) {
 962                 char *help_text = Help;
 963                 if (print_help == 2)
 964                         help_text = OptionHelp;
 965                 else
 966                         switch (mode) {
 967                         case ASSEMBLE : help_text = Help_assemble; break;
 968                         case BUILD    : help_text = Help_build; break;
 969                         case CREATE   : help_text = Help_create; break;
 970                         case MANAGE   : help_text = Help_manage; break;
 971                         case MISC     : help_text = Help_misc; break;
 972                         case MONITOR  : help_text = Help_monitor; break;
 973                         case GROW     : help_text = Help_grow; break;
 974                         case INCREMENTAL:help_text= Help_incr; break;
 975                         }
 976                 fputs(help_text,stdout);
 977                 exit(0);
 978         }
 979
 980         if (!mode && devs_found) {
 981                 mode = MISC;
 982                 devmode = 'Q';
 983                 if (devlist->disposition == 0)
 984                         devlist->disposition = devmode;
 985         }
 986         if (!mode) {
 987                 fputs(Usage, stderr);
 988                 exit(2);
 989         }
 990
 991         if (symlinks) {
 992                 struct createinfo *ci = conf_get_create_info();
 993
 994                 if (strcasecmp(symlinks, "yes") == 0)
 995                         ci->symlinks = 1;
 996                 else if (strcasecmp(symlinks, "no") == 0)
 997                         ci->symlinks = 0;
 998                 else {
 999                         fprintf(stderr, Name ": option --symlinks must be 'no' or 'yes'\n");
1000                         exit(2);
1001                 }
1002         }
1003         /* Ok, got the option parsing out of the way
1004          * hopefully it's mostly right but there might be some stuff
1005          * missing
1006          *
1007          * That is mosty checked in the per-mode stuff but...
1008          *
1009          * For @,B,C  and A without -s, the first device listed must be an md device
1010          * we check that here and open it.
1011          */
1012
1013         if (mode==MANAGE || mode == BUILD || mode == CREATE || mode == GROW ||
1014             (mode == ASSEMBLE && ! scan)) {
1015                 if (devs_found < 1) {
1016                         fprintf(stderr, Name ": an md device must be given in this mode\n");
1017                         exit(2);
1018                 }
1019                 if ((int)ident.super_minor == -2 && autof) {
1020                         fprintf(stderr, Name ": --super-minor=dev is incompatible with --auto\n");
1021                         exit(2);
1022                 }
1023                 if (mode == MANAGE || mode == GROW) {
1024                         mdfd = open_mddev(devlist->devname, 1);
1025                         if (mdfd < 0)
1026                                 exit(1);
1027                 } else
1028                         /* non-existent device is OK */
1029                         mdfd = open_mddev(devlist->devname, 0);
1030                 if (mdfd == -2) {
1031                         fprintf(stderr, Name ": device %s exists but is not an "
1032                                 "md array.\n", devlist->devname);
1033                         exit(1);
1034                 }
1035                 if ((int)ident.super_minor == -2) {
1036                         struct stat stb;
1037                         if (mdfd < 0) {
1038                                 fprintf(stderr, Name ": --super-minor=dev given, and "
1039                                         "listed device %s doesn't exist.\n",
1040                                         devlist->devname);
1041                                 exit(1);
1042                         }
1043                         fstat(mdfd, &stb);
1044                         ident.super_minor = minor(stb.st_rdev);
1045                 }
1046                 if (mdfd >= 0 && mode != MANAGE && mode != GROW) {
1047                         /* We don't really want this open yet, we just might
1048                          * have wanted to check some things
1049                          */
1050                         close(mdfd);
1051                         mdfd = -1;
1052                 }
1053         }
1054
1055         if (raiddisks) {
1056                 if (raiddisks > max_disks) {
1057                         fprintf(stderr, Name ": invalid number of raid devices: %d\n",
1058                                 raiddisks);
1059                         exit(2);
1060                 }
1061                 if (raiddisks == 1 &&  !force && level != -5) {
1062                         fprintf(stderr, Name ": '1' is an unusual number of drives for an array, so it is probably\n"
1063                                 "     a mistake.  If you really mean it you will need to specify --force before\n"
1064                                 "     setting the number of drives.\n");
1065                         exit(2);
1066                 }
1067         }
1068         if (sparedisks) {
1069                 if ( sparedisks > max_disks - raiddisks) {
1070                         fprintf(stderr, Name ": invalid number of spare-devices: %d\n",
1071                                 sparedisks);
1072                         exit(2);
1073                 }
1074         }
1075
1076         if (homehost == NULL)
1077                 homehost = conf_get_homehost(&require_homehost);
1078         if (homehost == NULL || strcmp(homehost, "<system>")==0) {
1079                 if (gethostname(sys_hostname, sizeof(sys_hostname)) == 0) {
1080                         sys_hostname[sizeof(sys_hostname)-1] = 0;
1081                         homehost = sys_hostname;
1082                 }
1083         }
1084
1085         if ((mode != MISC || devmode != 'E') &&
1086             geteuid() != 0) {
1087                 fprintf(stderr, Name ": must be super-user to perform this action\n");
1088                 exit(1);
1089         }
1090
1091         ident.autof = autof;
1092
1093         rv = 0;
1094         switch(mode) {
1095         case MANAGE:
1096                 /* readonly, add/remove, readwrite, runstop */
1097                 if (readonly>0)
1098                         rv = Manage_ro(devlist->devname, mdfd, readonly);
1099                 if (!rv && devs_found>1)
1100                         rv = Manage_subdevs(devlist->devname, mdfd,
1101                                             devlist->next, verbose-quiet, test);
1102                 if (!rv && readonly < 0)
1103                         rv = Manage_ro(devlist->devname, mdfd, readonly);
1104                 if (!rv && runstop)
1105                         rv = Manage_runstop(devlist->devname, mdfd, runstop, quiet);
1106                 break;
1107         case ASSEMBLE:
1108                 if (devs_found == 1 && ident.uuid_set == 0 &&
1109                     ident.super_minor == UnSet && ident.name[0] == 0 && !scan ) {
1110                         /* Only a device has been given, so get details from config file */
1111                         mddev_ident_t array_ident = conf_get_ident(devlist->devname);
1112                         if (array_ident == NULL) {
1113                                 fprintf(stderr, Name ": %s not identified in config file.\n",
1114                                         devlist->devname);
1115                                 rv |= 1;
1116                                 if (mdfd >= 0)
1117                                         close(mdfd);
1118                         } else {
1119                                 if (array_ident->autof == 0)
1120                                         array_ident->autof = autof;
1121                                 rv |= Assemble(ss, devlist->devname, array_ident,
1122                                                NULL, backup_file,
1123                                                readonly, runstop, update,
1124                                                homehost, require_homehost,
1125                                                verbose-quiet, force);
1126                         }
1127                 } else if (!scan)
1128                         rv = Assemble(ss, devlist->devname, &ident,
1129                                       devlist->next, backup_file,
1130                                       readonly, runstop, update,
1131                                       homehost, require_homehost,
1132                                       verbose-quiet, force);
1133                 else if (devs_found>0) {
1134                         if (update && devs_found > 1) {
1135                                 fprintf(stderr, Name ": can only update a single array at a time\n");
1136                                 exit(1);
1137                         }
1138                         if (backup_file && devs_found > 1) {
1139                                 fprintf(stderr, Name ": can only assemble a single array when providing a backup file.\n");
1140                                 exit(1);
1141                         }
1142                         for (dv = devlist ; dv ; dv=dv->next) {
1143                                 mddev_ident_t array_ident = conf_get_ident(dv->devname);
1144                                 if (array_ident == NULL) {
1145                                         fprintf(stderr, Name ": %s not identified in config file.\n",
1146                                                 dv->devname);
1147                                         rv |= 1;
1148                                         continue;
1149                                 }
1150                                 if (array_ident->autof == 0)
1151                                         array_ident->autof = autof;
1152                                 rv |= Assemble(ss, dv->devname, array_ident,
1153                                                NULL, backup_file,
1154                                                readonly, runstop, update,
1155                                                homehost, require_homehost,
1156                                                verbose-quiet, force);
1157                         }
1158                 } else {
1159                         mddev_ident_t a, array_list =  conf_get_ident(NULL);
1160                         mddev_dev_t devlist = conf_get_devs();
1161                         int cnt = 0;
1162                         int failures, successes;
1163                         if (devlist == NULL) {
1164                                 fprintf(stderr, Name ": No devices listed in conf file were found.\n");
1165                                 exit(1);
1166                         }
1167                         if (update) {
1168                                 fprintf(stderr, Name ": --update not meaningful with a --scan assembly.\n");
1169                                 exit(1);
1170                         }
1171                         if (backup_file) {
1172                                 fprintf(stderr, Name ": --backup_file not meaningful with a --scan assembly.\n");
1173                                 exit(1);
1174                         }
1175                         for (a = array_list; a ; a = a->next) {
1176                                 a->assembled = 0;
1177                                 if (a->autof == 0)
1178                                         a->autof = autof;
1179                         }
1180                         do {
1181                                 failures = 0;
1182                                 successes = 0;
1183                                 rv = 0;
1184                                 for (a = array_list; a ; a = a->next) {
1185                                         int r;
1186                                         if (a->assembled)
1187                                                 continue;
1188                                         if (a->devname &&
1189                                             strcasecmp(a->devname, "<ignore>") == 0)
1190                                                 continue;
1191
1192                                         r = Assemble(ss, a->devname,
1193                                                      a,
1194                                                      NULL, NULL,
1195                                                      readonly, runstop, NULL,
1196                                                      homehost, require_homehost,
1197                                                      verbose-quiet, force);
1198                                         if (r == 0) {
1199                                                 a->assembled = 1;
1200                                                 successes++;
1201                                         } else
1202                                                 failures++;
1203                                         rv |= r;
1204                                         cnt++;
1205                                 }
1206                         } while (failures && successes);
1207                         if (homehost && cnt == 0) {
1208                                 /* Maybe we can auto-assemble something.
1209                                  * Repeatedly call Assemble in auto-assemble mode
1210                                  * until it fails
1211                                  */
1212                                 int rv2;
1213                                 int acnt;
1214                                 ident.autof = autof;
1215                                 do {
1216                                         mddev_dev_t devlist = conf_get_devs();
1217                                         acnt = 0;
1218                                         do {
1219                                                 rv2 = Assemble(ss, NULL,
1220                                                                &ident,
1221                                                                devlist, NULL,
1222                                                                readonly, runstop, NULL,
1223                                                                homehost, require_homehost,
1224                                                                verbose-quiet, force);
1225                                                 if (rv2==0) {
1226                                                         cnt++;
1227                                                         acnt++;
1228                                                 }
1229                                                 if (rv2 == 1)
1230                                                         /* found something so even though assembly failed  we
1231                                                          * want to avoid auto-updates
1232                                                          */
1233                                                         auto_update_home = 0;
1234                                         } while (rv2!=2);
1235                                         /* Incase there are stacked devices, we need to go around again */
1236                                 } while (acnt);
1237 #if 0
1238                                 if (cnt == 0 && auto_update_home && homehost) {
1239                                         /* Nothing found, maybe we need to bootstrap homehost info */
1240                                         do {
1241                                                 acnt = 0;
1242                                                 do {
1243                                                         rv2 = Assemble(ss, NULL,
1244                                                                        &ident,
1245                                                                        NULL, NULL,
1246                                                                        readonly, runstop, "homehost",
1247                                                                        homehost, require_homehost,
1248                                                                        verbose-quiet, force);
1249                                                         if (rv2==0) {
1250                                                                 cnt++;
1251                                                                 acnt++;
1252                                                         }
1253                                                 } while (rv2!=2);
1254                                                 /* Incase there are stacked devices, we need to go around again */
1255                                         } while (acnt);
1256                                 }
1257 #endif
1258                                 if (cnt == 0 && rv == 0) {
1259                                         fprintf(stderr, Name ": No arrays found in config file or automatically\n");
1260                                         rv = 1;
1261                                 } else if (cnt)
1262                                         rv = 0;
1263                         } else if (cnt == 0 && rv == 0) {
1264                                 fprintf(stderr, Name ": No arrays found in config file\n");
1265                                 rv = 1;
1266                         }
1267                 }
1268                 break;
1269         case BUILD:
1270                 if (delay == 0) delay = DEFAULT_BITMAP_DELAY;
1271                 if (write_behind && !bitmap_file) {
1272                         fprintf(stderr, Name ": write-behind mode requires a bitmap.\n");
1273                         rv = 1;
1274                         break;
1275                 }
1276                 if (raiddisks == 0) {
1277                         fprintf(stderr, Name ": no raid-devices specified.\n");
1278                         rv = 1;
1279                         break;
1280                 }
1281
1282                 if (bitmap_file) {
1283                         if (strcmp(bitmap_file, "internal")==0) {
1284                                 fprintf(stderr, Name ": 'internal' bitmaps not supported with --build\n");
1285                                 rv |= 1;
1286                                 break;
1287                         }
1288                 }
1289                 rv = Build(devlist->devname, chunk, level, layout,
1290                            raiddisks, devlist->next, assume_clean,
1291                            bitmap_file, bitmap_chunk, write_behind,
1292                            delay, verbose-quiet, autof, size);
1293                 break;
1294         case CREATE:
1295                 if (delay == 0) delay = DEFAULT_BITMAP_DELAY;
1296                 if (write_behind && !bitmap_file) {
1297                         fprintf(stderr, Name ": write-behind mode requires a bitmap.\n");
1298                         rv = 1;
1299                         break;
1300                 }
1301                 if (raiddisks == 0) {
1302                         fprintf(stderr, Name ": no raid-devices specified.\n");
1303                         rv = 1;
1304                         break;
1305                 }
1306
1307                 rv = Create(ss, devlist->devname, chunk, level, layout, size<0 ? 0 : size,
1308                             raiddisks, sparedisks, ident.name, homehost,
1309                             ident.uuid_set ? ident.uuid : NULL,
1310                             devs_found-1, devlist->next, runstop, verbose-quiet, force, assume_clean,
1311                             bitmap_file, bitmap_chunk, write_behind, delay, autof);
1312                 break;
1313         case MISC:
1314                 if (devmode == 'E') {
1315                         if (devlist == NULL && !scan) {
1316                                 fprintf(stderr, Name ": No devices to examine\n");
1317                                 exit(2);
1318                         }
1319                         if (devlist == NULL)
1320                                 devlist = conf_get_devs();
1321                         if (devlist == NULL) {
1322                                 fprintf(stderr, Name ": No devices listed in %s\n", configfile?configfile:DefaultConfFile);
1323                                 exit(1);
1324                         }
1325                         if (brief && verbose)
1326                                 brief = 2;
1327                         rv = Examine(devlist, scan?(verbose>1?0:verbose+1):brief,
1328                                      export, scan,
1329                                      SparcAdjust, ss, homehost);
1330                 } else if (devmode == DetailPlatform) {
1331                         rv = Detail_Platform(ss ? ss->ss : NULL, ss ? scan : 1, verbose);
1332                 } else {
1333                         if (devlist == NULL) {
1334                                 if ((devmode=='D' || devmode == Waitclean) && scan) {
1335                                         /* apply --detail or --wait-clean to
1336                                          * all devices in /proc/mdstat
1337                                          */
1338                                         struct mdstat_ent *ms = mdstat_read(0, 1);
1339                                         struct mdstat_ent *e;
1340                                         struct map_ent *map = NULL;
1341                                         int members;
1342                                         int v = verbose>1?0:verbose+1;
1343
1344                                         for (members = 0; members <= 1; members++) {
1345                                         for (e=ms ; e ; e=e->next) {
1346                                                 char *name;
1347                                                 struct map_ent *me;
1348                                                 int member = e->metadata_version &&
1349                                                         strncmp(e->metadata_version,
1350                                                                 "external:/", 10) == 0;
1351                                                 if (members != member)
1352                                                         continue;
1353                                                 me = map_by_devnum(&map, e->devnum);
1354                                                 if (me && me->path
1355                                                     && strcmp(me->path, "/unknown") != 0)
1356                                                         name = me->path;
1357                                                 else
1358                                                         name = get_md_name(e->devnum);
1359
1360                                                 if (!name) {
1361                                                         fprintf(stderr, Name ": cannot find device file for %s\n",
1362                                                                 e->dev);
1363                                                         continue;
1364                                                 }
1365                                                 if (devmode == 'D')
1366                                                         rv |= Detail(name, v,
1367                                                                      export, test,
1368                                                                      homehost);
1369                                                 else
1370                                                         rv |= WaitClean(name, -1, v);
1371                                                 put_md_name(name);
1372                                         }
1373                                         }
1374                                         free_mdstat(ms);
1375                                 } else  if (devmode == 'S' && scan) {
1376                                         /* apply --stop to all devices in /proc/mdstat */
1377                                         /* Due to possible stacking of devices, repeat until
1378                                          * nothing more can be stopped
1379                                          */
1380                                         int progress=1, err;
1381                                         int last = 0;
1382                                         do {
1383                                                 struct mdstat_ent *ms = mdstat_read(0, 0);
1384                                                 struct mdstat_ent *e;
1385
1386                                                 if (!progress) last = 1;
1387                                                 progress = 0; err = 0;
1388                                                 for (e=ms ; e ; e=e->next) {
1389                                                         char *name = get_md_name(e->devnum);
1390
1391                                                         if (!name) {
1392                                                                 fprintf(stderr, Name ": cannot find device file for %s\n",
1393                                                                         e->dev);
1394                                                                 continue;
1395                                                         }
1396                                                         mdfd = open_mddev(name, 1);
1397                                                         if (mdfd >= 0) {
1398                                                                 if (Manage_runstop(name, mdfd, -1, quiet?1:last?0:-1))
1399                                                                         err = 1;
1400                                                                 else
1401                                                                         progress = 1;
1402                                                                 close(mdfd);
1403                                                         }
1404
1405                                                         put_md_name(name);
1406                                                 }
1407                                                 free_mdstat(ms);
1408                                         } while (!last && err);
1409                                         if (err) rv |= 1;
1410                                 } else {
1411                                         fprintf(stderr, Name ": No devices given.\n");
1412                                         exit(2);
1413                                 }
1414                         }
1415                         for (dv=devlist ; dv; dv=dv->next) {
1416                                 switch(dv->disposition) {
1417                                 case 'D':
1418                                         rv |= Detail(dv->devname,
1419                                                      brief?1+verbose:0,
1420                                                      export, test, homehost);
1421                                         continue;
1422                                 case 'K': /* Zero superblock */
1423                                         if (ss)
1424                                                 rv |= Kill(dv->devname, ss, force, quiet,0);
1425                                         else {
1426                                                 int q = quiet;
1427                                                 do {
1428                                                         rv |= Kill(dv->devname, NULL, force, q, 0);
1429                                                         q = 1;
1430                                                 } while (rv == 0);
1431                                                 rv &= ~2;
1432                                         }
1433                                         continue;
1434                                 case 'Q':
1435                                         rv |= Query(dv->devname); continue;
1436                                 case 'X':
1437                                         rv |= ExamineBitmap(dv->devname, brief, ss); continue;
1438                                 case 'W':
1439                                         rv |= Wait(dv->devname); continue;
1440                                 case Waitclean:
1441                                         rv |= WaitClean(dv->devname, -1, verbose-quiet); continue;
1442                                 case KillSubarray:
1443                                         rv |= Kill_subarray(dv->devname, subarray, quiet);
1444                                         continue;
1445                                 case UpdateSubarray:
1446                                         if (update == NULL) {
1447                                                 fprintf(stderr,
1448                                                         Name ": -U/--update must be specified with --update-subarray\n");
1449                                                 rv |= 1;
1450                                                 continue;
1451                                         }
1452                                         rv |= Update_subarray(dv->devname, subarray, update, &ident, quiet);
1453                                         continue;
1454                                 }
1455                                 mdfd = open_mddev(dv->devname, 1);
1456                                 if (mdfd>=0) {
1457                                         switch(dv->disposition) {
1458                                         case 'R':
1459                                                 rv |= Manage_runstop(dv->devname, mdfd, 1, quiet); break;
1460                                         case 'S':
1461                                                 rv |= Manage_runstop(dv->devname, mdfd, -1, quiet); break;
1462                                         case 'o':
1463                                                 rv |= Manage_ro(dv->devname, mdfd, 1); break;
1464                                         case 'w':
1465                                                 rv |= Manage_ro(dv->devname, mdfd, -1); break;
1466                                         }
1467                                         close(mdfd);
1468                                 } else
1469                                         rv |= 1;
1470                         }
1471                 }
1472                 break;
1473         case MONITOR:
1474                 if (!devlist && !scan) {
1475                         fprintf(stderr, Name ": Cannot monitor: need --scan or at least one device\n");
1476                         rv = 1;
1477                         break;
1478                 }
1479                 if (pidfile && !daemonise) {
1480                         fprintf(stderr, Name ": Cannot write a pid file when not in daemon mode\n");
1481                         rv = 1;
1482                         break;
1483                 }
1484                 if (delay == 0) {
1485                         if (get_linux_version() > 20616)
1486                                 /* mdstat responds to poll */
1487                                 delay = 1000;
1488                         else
1489                                 delay = 60;
1490                 }
1491                 rv= Monitor(devlist, mailaddr, program,
1492                             delay?delay:60, daemonise, scan, oneshot,
1493                             dosyslog, test, pidfile, increments);
1494                 break;
1495
1496         case GROW:
1497                 if (array_size >= 0) {
1498                         /* alway impose array size first, independent of
1499                          * anything else
1500                          * Do not allow level or raid_disks changes at the
1501                          * same time as that can be irreversibly destructive.
1502                          */
1503                         struct mdinfo sra;
1504                         int err;
1505                         if (raiddisks || level != UnSet) {
1506                                 fprintf(stderr, Name ": cannot change array size in same operation "
1507                                         "as changing raiddisks or level.\n"
1508                                         "    Change size first, then check that data is still intact.\n");
1509                                 rv = 1;
1510                                 break;
1511                         }
1512                         sysfs_init(&sra, mdfd, 0);
1513                         if (array_size == 0)
1514                                 err = sysfs_set_str(&sra, NULL, "array_size", "default");
1515                         else
1516                                 err = sysfs_set_num(&sra, NULL, "array_size", array_size / 2);
1517                         if (err < 0) {
1518                                 if (errno == E2BIG)
1519                                         fprintf(stderr, Name ": --array-size setting"
1520                                                 " is too large.\n");
1521                                 else
1522                                         fprintf(stderr, Name ": current kernel does"
1523                                                 " not support setting --array-size\n");
1524                                 rv = 1;
1525                                 break;
1526                         }
1527                 }
1528                 if (devs_found > 1) {
1529
1530                         /* must be '-a'. */
1531                         if (size >= 0 || raiddisks || chunk || layout_str != NULL || bitmap_file) {
1532                                 fprintf(stderr, Name ": --add cannot be used with other geometry changes in --grow mode\n");
1533                                 rv = 1;
1534                                 break;
1535                         }
1536                         for (dv=devlist->next; dv ; dv=dv->next) {
1537                                 rv = Grow_Add_device(devlist->devname, mdfd, dv->devname);
1538                                 if (rv)
1539                                         break;
1540                         }
1541                 } else if (bitmap_file) {
1542                         if (size >= 0 || raiddisks || chunk || layout_str != NULL) {
1543                                 fprintf(stderr, Name ": --bitmap changes cannot be used with other geometry changes in --grow mode\n");
1544                                 rv = 1;
1545                                 break;
1546                         }
1547                         if (delay == 0)
1548                                 delay = DEFAULT_BITMAP_DELAY;
1549                         rv = Grow_addbitmap(devlist->devname, mdfd, bitmap_file,
1550                                             bitmap_chunk, delay, write_behind, force);
1551                 } else if (size >= 0 || raiddisks != 0 || layout_str != NULL
1552                            || chunk != 0 || level != UnSet) {
1553                         rv = Grow_reshape(devlist->devname, mdfd, quiet, backup_file,
1554                                           size, level, layout_str, chunk, raiddisks);
1555                 } else if (array_size < 0)
1556                         fprintf(stderr, Name ": no changes to --grow\n");
1557                 break;
1558         case INCREMENTAL:
1559                 if (rebuild_map) {
1560                         RebuildMap();
1561                 }
1562                 if (scan) {
1563                         if (runstop <= 0) {
1564                                 fprintf(stderr, Name
1565                          ": --incremental --scan meaningless without --run.\n");
1566                                 break;
1567                         }
1568                         if (devmode == 'f') {
1569                                 fprintf(stderr, Name
1570                          ": --incremental --scan --fail not supported.\n");
1571                                 break;
1572                         }
1573                         rv = IncrementalScan(verbose);
1574                 }
1575                 if (!devlist) {
1576                         if (!rebuild_map && !scan) {
1577                                 fprintf(stderr, Name
1578                                         ": --incremental requires a device.\n");
1579                                 rv = 1;
1580                         }
1581                         break;
1582                 }
1583                 if (devlist->next) {
1584                         fprintf(stderr, Name
1585                                ": --incremental can only handle one device.\n");
1586                         rv = 1;
1587                         break;
1588                 }
1589                 if (devmode == 'f') {
1590                         rv = IncrementalRemove(devlist->devname, verbose-quiet);
1591                         break;
1592                 }
1593                 rv = Incremental(devlist->devname, verbose-quiet, runstop,
1594                                  ss, homehost, require_homehost, autof);
1595                 break;
1596         case AUTODETECT:
1597                 autodetect();
1598                 break;
1599         }
1600         exit(rv);
1601 }