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 sparedisks = 0;
  50         struct mddev_ident ident;
  51         char *configfile = NULL;
  52         char *cp;
  53         char *update = NULL;
  54         int scan = 0;
  55         int devmode = 0;
  56         int runstop = 0;
  57         int readonly = 0;
  58         int write_behind = 0;
  59         int bitmap_fd = -1;
  60         char *bitmap_file = NULL;
  61         char *backup_file = NULL;
  62         int invalid_backup = 0;
  63         int bitmap_chunk = UnSet;
  64         int SparcAdjust = 0;
  65         struct mddev_dev *devlist = NULL;
  66         struct mddev_dev **devlistend = & devlist;
  67         struct mddev_dev *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         int spare_sharing = 1;
 100         struct supertype *ss = NULL;
 101         int writemostly = 0;
 102         int re_add = 0;
 103         char *shortopt = short_options;
 104         int dosyslog = 0;
 105         int rebuild_map = 0;
 106         int auto_update_home = 0;
 107         char *subarray = NULL;
 108         char *remove_path = NULL;
 109         char *udev_filename = NULL;
 110
 111         int print_help = 0;
 112         FILE *outf;
 113
 114         int mdfd = -1;
 115
 116         srandom(time(0) ^ getpid());
 117
 118         ident.uuid_set=0;
 119         ident.level = UnSet;
 120         ident.raid_disks = UnSet;
 121         ident.super_minor= UnSet;
 122         ident.devices=0;
 123         ident.spare_group = NULL;
 124         ident.autof = 0;
 125         ident.st = NULL;
 126         ident.bitmap_fd = -1;
 127         ident.bitmap_file = NULL;
 128         ident.name[0] = 0;
 129         ident.container = NULL;
 130         ident.member = NULL;
 131
 132         while ((option_index = -1) ,
 133                (opt=getopt_long(argc, argv,
 134                                 shortopt, long_options,
 135                                 &option_index)) != -1) {
 136                 int newmode = mode;
 137                 /* firstly, some mode-independent options */
 138                 switch(opt) {
 139                 case HelpOptions:
 140                         print_help = 2;
 141                         continue;
 142                 case 'h':
 143                         print_help = 1;
 144                         continue;
 145
 146                 case 'V':
 147                         fputs(Version, stderr);
 148                         exit(0);
 149
 150                 case 'v': verbose++;
 151                         continue;
 152
 153                 case 'q': quiet++;
 154                         continue;
 155
 156                 case 'b':
 157                         if (mode == ASSEMBLE || mode == BUILD || mode == CREATE
 158                             || mode == GROW || mode == INCREMENTAL
 159                             || mode == MANAGE)
 160                                 break; /* b means bitmap */
 161                 case Brief:
 162                         brief = 1;
 163                         continue;
 164
 165                 case 'Y': export++;
 166                         continue;
 167
 168                 case HomeHost:
 169                         if (strcasecmp(optarg, "<ignore>") == 0)
 170                                 require_homehost = 0;
 171                         else
 172                                 homehost = optarg;
 173                         continue;
 174
 175                 case ':':
 176                 case '?':
 177                         fputs(Usage, stderr);
 178                         exit(2);
 179                 }
 180                 /* second, figure out the mode.
 181                  * Some options force the mode.  Others
 182                  * set the mode if it isn't already
 183                  */
 184
 185                 switch(opt) {
 186                 case ManageOpt:
 187                         newmode = MANAGE;
 188                         shortopt = short_bitmap_options;
 189                         break;
 190                 case 'a':
 191                 case Add:
 192                 case 'r':
 193                 case Remove:
 194                 case 'f':
 195                 case Fail:
 196                 case ReAdd: /* re-add */
 197                         if (!mode) {
 198                                 newmode = MANAGE;
 199                                 shortopt = short_bitmap_options;
 200                         }
 201                         break;
 202
 203                 case 'A': newmode = ASSEMBLE; shortopt = short_bitmap_auto_options; break;
 204                 case 'B': newmode = BUILD; shortopt = short_bitmap_auto_options; break;
 205                 case 'C': newmode = CREATE; shortopt = short_bitmap_auto_options; break;
 206                 case 'F': newmode = MONITOR;break;
 207                 case 'G': newmode = GROW;
 208                         shortopt = short_bitmap_options;
 209                         break;
 210                 case 'I': newmode = INCREMENTAL;
 211                         shortopt = short_bitmap_auto_options; break;
 212                 case AutoDetect:
 213                         newmode = AUTODETECT; break;
 214
 215                 case MiscOpt:
 216                 case 'D':
 217                 case 'E':
 218                 case 'X':
 219                 case 'Q': newmode = MISC; break;
 220                 case 'R':
 221                 case 'S':
 222                 case 'o':
 223                 case 'w':
 224                 case 'W':
 225                 case WaitOpt:
 226                 case Waitclean:
 227                 case DetailPlatform:
 228                 case KillSubarray:
 229                 case UpdateSubarray:
 230                         if (opt == KillSubarray || opt == UpdateSubarray) {
 231                                 if (subarray) {
 232                                         fprintf(stderr, Name ": subarray can only"
 233                                                 " be specified once\n");
 234                                         exit(2);
 235                                 }
 236                                 subarray = optarg;
 237                         }
 238                 case UdevRules:
 239                 case 'K': if (!mode) newmode = MISC; break;
 240                 case NoSharing: newmode = MONITOR; break;
 241                 }
 242                 if (mode && newmode == mode) {
 243                         /* everybody happy ! */
 244                 } else if (mode && newmode != mode) {
 245                         /* not allowed.. */
 246                         fprintf(stderr, Name ": ");
 247                         if (option_index >= 0)
 248                                 fprintf(stderr, "--%s", long_options[option_index].name);
 249                         else
 250                                 fprintf(stderr, "-%c", opt);
 251                         fprintf(stderr, " would set mdadm mode to \"%s\", but it is already set to \"%s\".\n",
 252                                 map_num(modes, newmode),
 253                                 map_num(modes, mode));
 254                         exit(2);
 255                 } else if (!mode && newmode) {
 256                         mode = newmode;
 257                 } else {
 258                         /* special case of -c --help */
 259                         if ((opt == 'c' || opt == ConfigFile) &&
 260                             ( strncmp(optarg, "--h", 3)==0 ||
 261                               strncmp(optarg, "-h", 2)==0)) {
 262                                 fputs(Help_config, stdout);
 263                                 exit(0);
 264                         }
 265
 266                         /* If first option is a device, don't force the mode yet */
 267                         if (opt == 1) {
 268                                 if (devs_found == 0) {
 269                                         dv = malloc(sizeof(*dv));
 270                                         if (dv == NULL) {
 271                                                 fprintf(stderr, Name ": malloc failed\n");
 272                                                 exit(3);
 273                                         }
 274                                         dv->devname = optarg;
 275                                         dv->disposition = devmode;
 276                                         dv->writemostly = writemostly;
 277                                         dv->re_add = re_add;
 278                                         dv->used = 0;
 279                                         dv->next = NULL;
 280                                         *devlistend = dv;
 281                                         devlistend = &dv->next;
 282
 283                                         devs_found++;
 284                                         continue;
 285                                 }
 286                                 /* No mode yet, and this is the second device ... */
 287                                 fprintf(stderr, Name ": An option must be given to set the mode before a second device\n"
 288                                         "       (%s) is listed\n", optarg);
 289                                 exit(2);
 290                         }
 291                         if (option_index >= 0)
 292                                 fprintf(stderr, Name ": --%s", long_options[option_index].name);
 293                         else
 294                                 fprintf(stderr, Name ": -%c", opt);
 295                         fprintf(stderr, " does not set the mode, and so cannot be the first option.\n");
 296                         exit(2);
 297                 }
 298
 299                 /* if we just set the mode, then done */
 300                 switch(opt) {
 301                 case ManageOpt:
 302                 case MiscOpt:
 303                 case 'A':
 304                 case 'B':
 305                 case 'C':
 306                 case 'F':
 307                 case 'G':
 308                 case 'I':
 309                 case AutoDetect:
 310                         continue;
 311                 }
 312                 if (opt == 1) {
 313                         /* an undecorated option - must be a device name.
 314                          */
 315                         if (devs_found > 0 && mode == MANAGE && !devmode) {
 316                                 fprintf(stderr, Name ": Must give one of -a/-r/-f"
 317                                         " for subsequent devices at %s\n", optarg);
 318                                 exit(2);
 319                         }
 320                         if (devs_found > 0 && mode == GROW && !devmode) {
 321                                 fprintf(stderr, Name ": Must give -a/--add for"
 322                                         " devices to add: %s\n", optarg);
 323                                 exit(2);
 324                         }
 325                         dv = malloc(sizeof(*dv));
 326                         if (dv == NULL) {
 327                                 fprintf(stderr, Name ": malloc failed\n");
 328                                 exit(3);
 329                         }
 330                         dv->devname = optarg;
 331                         dv->disposition = devmode;
 332                         dv->writemostly = writemostly;
 333                         dv->re_add = re_add;
 334                         dv->used = 0;
 335                         dv->next = NULL;
 336                         *devlistend = dv;
 337                         devlistend = &dv->next;
 338
 339                         devs_found++;
 340                         continue;
 341                 }
 342
 343                 /* We've got a mode, and opt is now something else which
 344                  * could depend on the mode */
 345 #define O(a,b) ((a<<16)|b)
 346                 switch (O(mode,opt)) {
 347                 case O(GROW,'c'):
 348                 case O(GROW,ChunkSize):
 349                 case O(CREATE,'c'):
 350                 case O(CREATE,ChunkSize):
 351                 case O(BUILD,'c'): /* chunk or rounding */
 352                 case O(BUILD,ChunkSize): /* chunk or rounding */
 353                         if (chunk) {
 354                                 fprintf(stderr, Name ": chunk/rounding may only be specified once. "
 355                                         "Second value is %s.\n", optarg);
 356                                 exit(2);
 357                         }
 358                         chunk = parse_size(optarg);
 359                         if (chunk < 8 || ((chunk-1)&chunk)) {
 360                                 fprintf(stderr, Name ": invalid chunk/rounding value: %s\n",
 361                                         optarg);
 362                                 exit(2);
 363                         }
 364                         /* Covert sectors to K */
 365                         chunk /= 2;
 366                         continue;
 367
 368 #if 0
 369                 case O(ASSEMBLE,AutoHomeHost):
 370                         auto_update_home = 1;
 371                         continue;
 372 #endif
 373                 case O(INCREMENTAL, 'e'):
 374                 case O(CREATE,'e'):
 375                 case O(ASSEMBLE,'e'):
 376                 case O(MISC,'e'): /* set metadata (superblock) information */
 377                         if (ss) {
 378                                 fprintf(stderr, Name ": metadata information already given\n");
 379                                 exit(2);
 380                         }
 381                         for(i=0; !ss && superlist[i]; i++)
 382                                 ss = superlist[i]->match_metadata_desc(optarg);
 383
 384                         if (!ss) {
 385                                 fprintf(stderr, Name ": unrecognised metadata identifier: %s\n", optarg);
 386                                 exit(2);
 387                         }
 388                         continue;
 389
 390                 case O(MANAGE,'W'):
 391                 case O(MANAGE,WriteMostly):
 392                 case O(BUILD,'W'):
 393                 case O(BUILD,WriteMostly):
 394                 case O(CREATE,'W'):
 395                 case O(CREATE,WriteMostly):
 396                         /* set write-mostly for following devices */
 397                         writemostly = 1;
 398                         continue;
 399
 400                 case O(MANAGE,'w'):
 401                         /* clear write-mostly for following devices */
 402                         writemostly = 2;
 403                         continue;
 404
 405
 406                 case O(GROW,'z'):
 407                 case O(CREATE,'z'):
 408                 case O(BUILD,'z'): /* size */
 409                         if (size >= 0) {
 410                                 fprintf(stderr, Name ": size may only be specified once. "
 411                                         "Second value is %s.\n", optarg);
 412                                 exit(2);
 413                         }
 414                         if (strcmp(optarg, "max")==0)
 415                                 size = 0;
 416                         else {
 417                                 size = parse_size(optarg);
 418                                 if (size < 8) {
 419                                         fprintf(stderr, Name ": invalid size: %s\n",
 420                                                 optarg);
 421                                         exit(2);
 422                                 }
 423                                 /* convert sectors to K */
 424                                 size /= 2;
 425                         }
 426                         continue;
 427
 428                 case O(GROW,'Z'): /* array size */
 429                         if (array_size >= 0) {
 430                                 fprintf(stderr, Name ": array-size may only be specified once. "
 431                                         "Second value is %s.\n", optarg);
 432                                 exit(2);
 433                         }
 434                         if (strcmp(optarg, "max") == 0)
 435                                 array_size = 0;
 436                         else {
 437                                 array_size = parse_size(optarg);
 438                                 if (array_size <= 0) {
 439                                         fprintf(stderr, Name ": invalid array size: %s\n",
 440                                                 optarg);
 441                                         exit(2);
 442                                 }
 443                         }
 444                         continue;
 445
 446                 case O(GROW,'l'):
 447                 case O(CREATE,'l'):
 448                 case O(BUILD,'l'): /* set raid level*/
 449                         if (level != UnSet) {
 450                                 fprintf(stderr, Name ": raid level may only be set once.  "
 451                                         "Second value is %s.\n", optarg);
 452                                 exit(2);
 453                         }
 454                         level = map_name(pers, optarg);
 455                         if (level == UnSet) {
 456                                 fprintf(stderr, Name ": invalid raid level: %s\n",
 457                                         optarg);
 458                                 exit(2);
 459                         }
 460                         if (level != 0 && level != LEVEL_LINEAR && level != 1 &&
 461                             level != LEVEL_MULTIPATH && level != LEVEL_FAULTY &&
 462                             level != 10 &&
 463                             mode == BUILD) {
 464                                 fprintf(stderr, Name ": Raid level %s not permitted with --build.\n",
 465                                         optarg);
 466                                 exit(2);
 467                         }
 468                         if (sparedisks > 0 && level < 1 && level >= -1) {
 469                                 fprintf(stderr, Name ": raid level %s is incompatible with spare-devices setting.\n",
 470                                         optarg);
 471                                 exit(2);
 472                         }
 473                         ident.level = level;
 474                         continue;
 475
 476                 case O(GROW, 'p'): /* new layout */
 477                 case O(GROW, Layout):
 478                         if (layout_str) {
 479                                 fprintf(stderr,Name ": layout may only be sent once.  "
 480                                         "Second value was %s\n", optarg);
 481                                 exit(2);
 482                         }
 483                         layout_str = optarg;
 484                         /* 'Grow' will parse the value */
 485                         continue;
 486
 487                 case O(CREATE,'p'): /* raid5 layout */
 488                 case O(CREATE,Layout):
 489                 case O(BUILD,'p'): /* faulty layout */
 490                 case O(BUILD,Layout):
 491                         if (layout != UnSet) {
 492                                 fprintf(stderr,Name ": layout may only be sent once.  "
 493                                         "Second value was %s\n", optarg);
 494                                 exit(2);
 495                         }
 496                         switch(level) {
 497                         default:
 498                                 fprintf(stderr, Name ": layout not meaningful for %s arrays.\n",
 499                                         map_num(pers, level));
 500                                 exit(2);
 501                         case UnSet:
 502                                 fprintf(stderr, Name ": raid level must be given before layout.\n");
 503                                 exit(2);
 504
 505                         case 5:
 506                                 layout = map_name(r5layout, optarg);
 507                                 if (layout==UnSet) {
 508                                         fprintf(stderr, Name ": layout %s not understood for raid5.\n",
 509                                                 optarg);
 510                                         exit(2);
 511                                 }
 512                                 break;
 513                         case 6:
 514                                 layout = map_name(r6layout, optarg);
 515                                 if (layout==UnSet) {
 516                                         fprintf(stderr, Name ": layout %s not understood for raid6.\n",
 517                                                 optarg);
 518                                         exit(2);
 519                                 }
 520                                 break;
 521
 522                         case 10:
 523                                 layout = parse_layout_10(optarg);
 524                                 if (layout < 0) {
 525                                         fprintf(stderr, Name ": layout for raid10 must be 'nNN', 'oNN' or 'fNN' where NN is a number, not %s\n", optarg);
 526                                         exit(2);
 527                                 }
 528                                 break;
 529                         case LEVEL_FAULTY:
 530                                 /* Faulty
 531                                  * modeNNN
 532                                  */
 533                                 layout = parse_layout_faulty(optarg);
 534                                 if (layout == -1) {
 535                                         fprintf(stderr, Name ": layout %s not understood for faulty.\n",
 536                                                 optarg);
 537                                         exit(2);
 538                                 }
 539                                 break;
 540                         }
 541                         continue;
 542
 543                 case O(CREATE,AssumeClean):
 544                 case O(BUILD,AssumeClean): /* assume clean */
 545                         assume_clean = 1;
 546                         continue;
 547
 548                 case O(GROW,'n'):
 549                 case O(CREATE,'n'):
 550                 case O(BUILD,'n'): /* number of raid disks */
 551                         if (raiddisks) {
 552                                 fprintf(stderr, Name ": raid-devices set twice: %d and %s\n",
 553                                         raiddisks, optarg);
 554                                 exit(2);
 555                         }
 556                         raiddisks = strtol(optarg, &c, 10);
 557                         if (!optarg[0] || *c || raiddisks<=0) {
 558                                 fprintf(stderr, Name ": invalid number of raid devices: %s\n",
 559                                         optarg);
 560                                 exit(2);
 561                         }
 562                         ident.raid_disks = raiddisks;
 563                         continue;
 564
 565                 case O(CREATE,'x'): /* number of spare (eXtra) discs */
 566                         if (sparedisks) {
 567                                 fprintf(stderr,Name ": spare-devices set twice: %d and %s\n",
 568                                         sparedisks, optarg);
 569                                 exit(2);
 570                         }
 571                         if (level != UnSet && level <= 0 && level >= -1) {
 572                                 fprintf(stderr, Name ": spare-devices setting is incompatible with raid level %d\n",
 573                                         level);
 574                                 exit(2);
 575                         }
 576                         sparedisks = strtol(optarg, &c, 10);
 577                         if (!optarg[0] || *c || sparedisks < 0) {
 578                                 fprintf(stderr, Name ": invalid number of spare-devices: %s\n",
 579                                         optarg);
 580                                 exit(2);
 581                         }
 582                         continue;
 583
 584                 case O(CREATE,'a'):
 585                 case O(CREATE,Auto):
 586                 case O(BUILD,'a'):
 587                 case O(BUILD,Auto):
 588                 case O(INCREMENTAL,'a'):
 589                 case O(INCREMENTAL,Auto):
 590                 case O(ASSEMBLE,'a'):
 591                 case O(ASSEMBLE,Auto): /* auto-creation of device node */
 592                         autof = parse_auto(optarg, "--auto flag", 0);
 593                         continue;
 594
 595                 case O(CREATE,Symlinks):
 596                 case O(BUILD,Symlinks):
 597                 case O(ASSEMBLE,Symlinks): /* auto creation of symlinks in /dev to /dev/md */
 598                         symlinks = optarg;
 599                         continue;
 600
 601                 case O(BUILD,'f'): /* force honouring '-n 1' */
 602                 case O(BUILD,Force): /* force honouring '-n 1' */
 603                 case O(GROW,'f'): /* ditto */
 604                 case O(GROW,Force): /* ditto */
 605                 case O(CREATE,'f'): /* force honouring of device list */
 606                 case O(CREATE,Force): /* force honouring of device list */
 607                 case O(ASSEMBLE,'f'): /* force assembly */
 608                 case O(ASSEMBLE,Force): /* force assembly */
 609                 case O(MISC,'f'): /* force zero */
 610                 case O(MISC,Force): /* force zero */
 611                         force=1;
 612                         continue;
 613
 614                         /* now for the Assemble options */
 615                 case O(CREATE,'u'): /* uuid of array */
 616                 case O(ASSEMBLE,'u'): /* uuid of array */
 617                         if (ident.uuid_set) {
 618                                 fprintf(stderr, Name ": uuid cannot be set twice.  "
 619                                         "Second value %s.\n", optarg);
 620                                 exit(2);
 621                         }
 622                         if (parse_uuid(optarg, ident.uuid))
 623                                 ident.uuid_set = 1;
 624                         else {
 625                                 fprintf(stderr,Name ": Bad uuid: %s\n", optarg);
 626                                 exit(2);
 627                         }
 628                         continue;
 629
 630                 case O(CREATE,'N'):
 631                 case O(ASSEMBLE,'N'):
 632                 case O(MISC,'N'):
 633                         if (ident.name[0]) {
 634                                 fprintf(stderr, Name ": name cannot be set twice.   "
 635                                         "Second value %s.\n", optarg);
 636                                 exit(2);
 637                         }
 638                         if (mode == MISC && !subarray) {
 639                                 fprintf(stderr, Name ": -N/--name only valid with --update-subarray in misc mode\n");
 640                                 exit(2);
 641                         }
 642                         if (strlen(optarg) > 32) {
 643                                 fprintf(stderr, Name ": name '%s' is too long, 32 chars max.\n",
 644                                         optarg);
 645                                 exit(2);
 646                         }
 647                         strcpy(ident.name, optarg);
 648                         continue;
 649
 650                 case O(ASSEMBLE,'m'): /* super-minor for array */
 651                 case O(ASSEMBLE,SuperMinor):
 652                         if (ident.super_minor != UnSet) {
 653                                 fprintf(stderr, Name ": super-minor cannot be set twice.  "
 654                                         "Second value: %s.\n", optarg);
 655                                 exit(2);
 656                         }
 657                         if (strcmp(optarg, "dev")==0)
 658                                 ident.super_minor = -2;
 659                         else {
 660                                 ident.super_minor = strtoul(optarg, &cp, 10);
 661                                 if (!optarg[0] || *cp) {
 662                                         fprintf(stderr, Name ": Bad super-minor number: %s.\n", optarg);
 663                                         exit(2);
 664                                 }
 665                         }
 666                         continue;
 667
 668                 case O(ASSEMBLE,'U'): /* update the superblock */
 669                 case O(MISC,'U'):
 670                         if (update) {
 671                                 fprintf(stderr, Name ": Can only update one aspect"
 672                                         " of superblock, both %s and %s given.\n",
 673                                         update, optarg);
 674                                 exit(2);
 675                         }
 676                         if (mode == MISC && !subarray) {
 677                                 fprintf(stderr, Name ": Only subarrays can be"
 678                                         " updated in misc mode\n");
 679                                 exit(2);
 680                         }
 681                         update = optarg;
 682                         if (strcmp(update, "sparc2.2")==0)
 683                                 continue;
 684                         if (strcmp(update, "super-minor") == 0)
 685                                 continue;
 686                         if (strcmp(update, "summaries")==0)
 687                                 continue;
 688                         if (strcmp(update, "resync")==0)
 689                                 continue;
 690                         if (strcmp(update, "uuid")==0)
 691                                 continue;
 692                         if (strcmp(update, "name")==0)
 693                                 continue;
 694                         if (strcmp(update, "homehost")==0)
 695                                 continue;
 696                         if (strcmp(update, "devicesize")==0)
 697                                 continue;
 698                         if (strcmp(update, "no-bitmap")==0)
 699                                 continue;
 700                         if (strcmp(update, "byteorder")==0) {
 701                                 if (ss) {
 702                                         fprintf(stderr,
 703                                                 Name ": must not set metadata"
 704                                                 " type with --update=byteorder.\n");
 705                                         exit(2);
 706                                 }
 707                                 for(i=0; !ss && superlist[i]; i++)
 708                                         ss = superlist[i]->match_metadata_desc(
 709                                                 "0.swap");
 710                                 if (!ss) {
 711                                         fprintf(stderr, Name ": INTERNAL ERROR"
 712                                                 " cannot find 0.swap\n");
 713                                         exit(2);
 714                                 }
 715
 716                                 continue;
 717                         }
 718                         if (strcmp(update,"?") == 0 ||
 719                             strcmp(update, "help") == 0) {
 720                                 outf = stdout;
 721                                 fprintf(outf, Name ": ");
 722                         } else {
 723                                 outf = stderr;
 724                                 fprintf(outf,
 725                                         Name ": '--update=%s' is invalid.  ",
 726                                         update);
 727                         }
 728                         fprintf(outf, "Valid --update options are:\n"
 729                 "     'sparc2.2', 'super-minor', 'uuid', 'name', 'resync',\n"
 730                 "     'summaries', 'homehost', 'byteorder', 'devicesize',\n"
 731                 "     'no-bitmap'\n");
 732                         exit(outf == stdout ? 0 : 2);
 733
 734                 case O(MANAGE,'U'):
 735                         /* update=devicesize is allowed with --re-add */
 736                         if (devmode != 'a' || re_add != 1) {
 737                                 fprintf(stderr, Name "--update in Manage mode only"
 738                                         " allowed with --re-add.\n");
 739                                 exit(1);
 740                         }
 741                         if (update) {
 742                                 fprintf(stderr, Name ": Can only update one aspect"
 743                                         " of superblock, both %s and %s given.\n",
 744                                         update, optarg);
 745                                 exit(2);
 746                         }
 747                         update = optarg;
 748                         if (strcmp(update, "devicesize") != 0) {
 749                                 fprintf(stderr, Name ": only 'devicesize' can be"
 750                                         " updated with --re-add\n");
 751                                 exit(2);
 752                         }
 753                         continue;
 754
 755                 case O(INCREMENTAL,NoDegraded):
 756                         fprintf(stderr, Name ": --no-degraded is deprecated in Incremental mode\n");
 757                 case O(ASSEMBLE,NoDegraded): /* --no-degraded */
 758                         runstop = -1; /* --stop isn't allowed for --assemble,
 759                                        * so we overload slightly */
 760                         continue;
 761
 762                 case O(ASSEMBLE,'c'):
 763                 case O(ASSEMBLE,ConfigFile):
 764                 case O(INCREMENTAL, 'c'):
 765                 case O(INCREMENTAL, ConfigFile):
 766                 case O(MISC, 'c'):
 767                 case O(MISC, ConfigFile):
 768                 case O(MONITOR,'c'):
 769                 case O(MONITOR,ConfigFile):
 770                         if (configfile) {
 771                                 fprintf(stderr, Name ": configfile cannot be set twice.  "
 772                                         "Second value is %s.\n", optarg);
 773                                 exit(2);
 774                         }
 775                         configfile = optarg;
 776                         set_conffile(configfile);
 777                         /* FIXME possibly check that config file exists.  Even parse it */
 778                         continue;
 779                 case O(ASSEMBLE,'s'): /* scan */
 780                 case O(MISC,'s'):
 781                 case O(MONITOR,'s'):
 782                 case O(INCREMENTAL,'s'):
 783                         scan = 1;
 784                         continue;
 785
 786                 case O(MONITOR,'m'): /* mail address */
 787                 case O(MONITOR,EMail):
 788                         if (mailaddr)
 789                                 fprintf(stderr, Name ": only specify one mailaddress. %s ignored.\n",
 790                                         optarg);
 791                         else
 792                                 mailaddr = optarg;
 793                         continue;
 794
 795                 case O(MONITOR,'p'): /* alert program */
 796                 case O(MONITOR,ProgramOpt): /* alert program */
 797                         if (program)
 798                                 fprintf(stderr, Name ": only specify one alter program. %s ignored.\n",
 799                                         optarg);
 800                         else
 801                                 program = optarg;
 802                         continue;
 803
 804                 case O(MONITOR,'r'): /* rebuild increments */
 805                 case O(MONITOR,Increment):
 806                         increments = atoi(optarg);
 807                         if (increments>99 || increments<1) {
 808                                 fprintf(stderr, Name ": please specify positive integer between 1 and 99 as rebuild increments.\n");
 809                                 exit(2);
 810                         }
 811                         continue;
 812
 813                 case O(MONITOR,'d'): /* delay in seconds */
 814                 case O(GROW, 'd'):
 815                 case O(BUILD,'d'): /* delay for bitmap updates */
 816                 case O(CREATE,'d'):
 817                         if (delay)
 818                                 fprintf(stderr, Name ": only specify delay once. %s ignored.\n",
 819                                         optarg);
 820                         else {
 821                                 delay = strtol(optarg, &c, 10);
 822                                 if (!optarg[0] || *c || delay<1) {
 823                                         fprintf(stderr, Name ": invalid delay: %s\n",
 824                                                 optarg);
 825                                         exit(2);
 826                                 }
 827                         }
 828                         continue;
 829                 case O(MONITOR,'f'): /* daemonise */
 830                 case O(MONITOR,Fork):
 831                         daemonise = 1;
 832                         continue;
 833                 case O(MONITOR,'i'): /* pid */
 834                         if (pidfile)
 835                                 fprintf(stderr, Name ": only specify one pid file. %s ignored.\n",
 836                                         optarg);
 837                         else
 838                                 pidfile = optarg;
 839                         continue;
 840                 case O(MONITOR,'1'): /* oneshot */
 841                         oneshot = 1;
 842                         continue;
 843                 case O(MONITOR,'t'): /* test */
 844                         test = 1;
 845                         continue;
 846                 case O(MONITOR,'y'): /* log messages to syslog */
 847                         openlog("mdadm", LOG_PID, SYSLOG_FACILITY);
 848                         dosyslog = 1;
 849                         continue;
 850                 case O(MONITOR, NoSharing):
 851                         spare_sharing = 0;
 852                         continue;
 853                         /* now the general management options.  Some are applicable
 854                          * to other modes. None have arguments.
 855                          */
 856                 case O(GROW,'a'):
 857                 case O(GROW,Add):
 858                 case O(MANAGE,'a'):
 859                 case O(MANAGE,Add): /* add a drive */
 860                         devmode = 'a';
 861                         re_add = 0;
 862                         continue;
 863                 case O(MANAGE,ReAdd):
 864                         devmode = 'a';
 865                         re_add = 1;
 866                         continue;
 867                 case O(MANAGE,'r'): /* remove a drive */
 868                 case O(MANAGE,Remove):
 869                         devmode = 'r';
 870                         continue;
 871                 case O(MANAGE,'f'): /* set faulty */
 872                 case O(MANAGE,Fail):
 873                 case O(INCREMENTAL,'f'):
 874                 case O(INCREMENTAL,Remove):
 875                 case O(INCREMENTAL,Fail): /* r for incremental is taken, use f
 876                                           * even though we will both fail and
 877                                           * remove the device */
 878                         devmode = 'f';
 879                         continue;
 880                 case O(INCREMENTAL,'R'):
 881                 case O(MANAGE,'R'):
 882                 case O(ASSEMBLE,'R'):
 883                 case O(BUILD,'R'):
 884                 case O(CREATE,'R'): /* Run the array */
 885                         if (runstop < 0) {
 886                                 fprintf(stderr, Name ": Cannot both Stop and Run an array\n");
 887                                 exit(2);
 888                         }
 889                         runstop = 1;
 890                         continue;
 891                 case O(MANAGE,'S'):
 892                         if (runstop > 0) {
 893                                 fprintf(stderr, Name ": Cannot both Run and Stop an array\n");
 894                                 exit(2);
 895                         }
 896                         runstop = -1;
 897                         continue;
 898                 case O(MANAGE,'t'):
 899                         test = 1;
 900                         continue;
 901
 902                 case O(MISC,'Q'):
 903                 case O(MISC,'D'):
 904                 case O(MISC,'E'):
 905                 case O(MISC,'K'):
 906                 case O(MISC,'R'):
 907                 case O(MISC,'S'):
 908                 case O(MISC,'X'):
 909                 case O(MISC,'o'):
 910                 case O(MISC,'w'):
 911                 case O(MISC,'W'):
 912                 case O(MISC, WaitOpt):
 913                 case O(MISC, Waitclean):
 914                 case O(MISC, DetailPlatform):
 915                 case O(MISC, KillSubarray):
 916                 case O(MISC, UpdateSubarray):
 917                         if (devmode && devmode != opt &&
 918                             (devmode == 'E' || (opt == 'E' && devmode != 'Q'))) {
 919                                 fprintf(stderr, Name ": --examine/-E cannot be given with ");
 920                                 if (devmode == 'E') {
 921                                         if (option_index >= 0)
 922                                                 fprintf(stderr, "--%s\n",
 923                                                         long_options[option_index].name);
 924                                         else
 925                                                 fprintf(stderr, "-%c\n", opt);
 926                                 } else if (isalpha(devmode))
 927                                         fprintf(stderr, "-%c\n", devmode);
 928                                 else
 929                                         fprintf(stderr, "previous option\n");
 930                                 exit(2);
 931                         }
 932                         devmode = opt;
 933                         continue;
 934                case O(MISC, UdevRules):
 935                        if (devmode && devmode != opt) {
 936                                fprintf(stderr, Name ": --udev-rules must"
 937                                        " be the only option.\n");
 938                        } else {
 939                                if (udev_filename)
 940                                        fprintf(stderr, Name ": only specify one udev "
 941                                                "rule filename. %s ignored.\n",
 942                                                optarg);
 943                                else
 944                                        udev_filename = optarg;
 945                        }
 946                        devmode = opt;
 947                        continue;
 948                 case O(MISC,'t'):
 949                         test = 1;
 950                         continue;
 951
 952                 case O(MISC, Sparc22):
 953                         if (devmode != 'E') {
 954                                 fprintf(stderr, Name ": --sparc2.2 only allowed with --examine\n");
 955                                 exit(2);
 956                         }
 957                         SparcAdjust = 1;
 958                         continue;
 959
 960                 case O(ASSEMBLE,'b'): /* here we simply set the bitmap file */
 961                 case O(ASSEMBLE,Bitmap):
 962                         if (!optarg) {
 963                                 fprintf(stderr, Name ": bitmap file needed with -b in --assemble mode\n");
 964                                 exit(2);
 965                         }
 966                         if (strcmp(optarg, "internal")==0) {
 967                                 fprintf(stderr, Name ": there is no need to specify --bitmap when assembling arrays with internal bitmaps\n");
 968                                 continue;
 969                         }
 970                         bitmap_fd = open(optarg, O_RDWR);
 971                         if (!*optarg || bitmap_fd < 0) {
 972                                 fprintf(stderr, Name ": cannot open bitmap file %s: %s\n", optarg, strerror(errno));
 973                                 exit(2);
 974                         }
 975                         ident.bitmap_fd = bitmap_fd; /* for Assemble */
 976                         continue;
 977
 978                 case O(ASSEMBLE, BackupFile):
 979                 case O(GROW, BackupFile):
 980                         /* Specify a file into which grow might place a backup,
 981                          * or from which assemble might recover a backup
 982                          */
 983                         if (backup_file) {
 984                                 fprintf(stderr, Name ": backup file already specified, rejecting %s\n", optarg);
 985                                 exit(2);
 986                         }
 987                         backup_file = optarg;
 988                         continue;
 989
 990                 case O(ASSEMBLE, InvalidBackup):
 991                         /* Acknowledge that the backupfile is invalid, but ask
 992                          * to continue anyway
 993                          */
 994                         invalid_backup = 1;
 995                         continue;
 996
 997                 case O(BUILD,'b'):
 998                 case O(BUILD,Bitmap):
 999                 case O(CREATE,'b'):
1000                 case O(CREATE,Bitmap): /* here we create the bitmap */
1001                         if (strcmp(optarg, "none") == 0) {
1002                                 fprintf(stderr, Name ": '--bitmap none' only"
1003                                         " support for --grow\n");
1004                                 exit(2);
1005                         }
1006                         /* FALL THROUGH */
1007                 case O(GROW,'b'):
1008                 case O(GROW,Bitmap):
1009                         if (strcmp(optarg, "internal")== 0 ||
1010                             strcmp(optarg, "none")== 0 ||
1011                             strchr(optarg, '/') != NULL) {
1012                                 bitmap_file = optarg;
1013                                 continue;
1014                         }
1015                         /* probable typo */
1016                         fprintf(stderr, Name ": bitmap file must contain a '/', or be 'internal', or 'none'\n"
1017                                 "       not '%s'\n", optarg);
1018                         exit(2);
1019
1020                 case O(GROW,BitmapChunk):
1021                 case O(BUILD,BitmapChunk):
1022                 case O(CREATE,BitmapChunk): /* bitmap chunksize */
1023                         bitmap_chunk = parse_size(optarg);
1024                         if (bitmap_chunk < 0 ||
1025                             bitmap_chunk & (bitmap_chunk - 1)) {
1026                                 fprintf(stderr,
1027                                         Name ": invalid bitmap chunksize: %s\n",
1028                                         optarg);
1029                                 exit(2);
1030                         }
1031                         /* convert sectors to B, chunk of 0 means 512B */
1032                         bitmap_chunk = bitmap_chunk ? bitmap_chunk * 512 : 512;
1033                         continue;
1034
1035                 case O(GROW, WriteBehind):
1036                 case O(BUILD, WriteBehind):
1037                 case O(CREATE, WriteBehind): /* write-behind mode */
1038                         write_behind = DEFAULT_MAX_WRITE_BEHIND;
1039                         if (optarg) {
1040                                 write_behind = strtol(optarg, &c, 10);
1041                                 if (write_behind < 0 || *c ||
1042                                     write_behind > 16383) {
1043                                         fprintf(stderr, Name ": Invalid value for maximum outstanding write-behind writes: %s.\n\tMust be between 0 and 16383.\n", optarg);
1044                                         exit(2);
1045                                 }
1046                         }
1047                         continue;
1048
1049                 case O(INCREMENTAL, 'r'):
1050                 case O(INCREMENTAL, RebuildMapOpt):
1051                         rebuild_map = 1;
1052                         continue;
1053                 case O(INCREMENTAL, IncrementalPath):
1054                         remove_path = optarg;
1055                         continue;
1056                 }
1057                 /* We have now processed all the valid options. Anything else is
1058                  * an error
1059                  */
1060                 if (option_index > 0)
1061                         fprintf(stderr, Name ":option --%s not valid in %s mode\n",
1062                                 long_options[option_index].name,
1063                                 map_num(modes, mode));
1064                 else
1065                         fprintf(stderr, Name ": option -%c not valid in %s mode\n",
1066                                 opt, map_num(modes, mode));
1067                 exit(2);
1068
1069         }
1070
1071         if (print_help) {
1072                 char *help_text = Help;
1073                 if (print_help == 2)
1074                         help_text = OptionHelp;
1075                 else
1076                         switch (mode) {
1077                         case ASSEMBLE : help_text = Help_assemble; break;
1078                         case BUILD    : help_text = Help_build; break;
1079                         case CREATE   : help_text = Help_create; break;
1080                         case MANAGE   : help_text = Help_manage; break;
1081                         case MISC     : help_text = Help_misc; break;
1082                         case MONITOR  : help_text = Help_monitor; break;
1083                         case GROW     : help_text = Help_grow; break;
1084                         case INCREMENTAL:help_text= Help_incr; break;
1085                         }
1086                 fputs(help_text,stdout);
1087                 exit(0);
1088         }
1089
1090         if (!mode && devs_found) {
1091                 mode = MISC;
1092                 devmode = 'Q';
1093                 if (devlist->disposition == 0)
1094                         devlist->disposition = devmode;
1095         }
1096         if (!mode) {
1097                 fputs(Usage, stderr);
1098                 exit(2);
1099         }
1100
1101         if (symlinks) {
1102                 struct createinfo *ci = conf_get_create_info();
1103
1104                 if (strcasecmp(symlinks, "yes") == 0)
1105                         ci->symlinks = 1;
1106                 else if (strcasecmp(symlinks, "no") == 0)
1107                         ci->symlinks = 0;
1108                 else {
1109                         fprintf(stderr, Name ": option --symlinks must be 'no' or 'yes'\n");
1110                         exit(2);
1111                 }
1112         }
1113         /* Ok, got the option parsing out of the way
1114          * hopefully it's mostly right but there might be some stuff
1115          * missing
1116          *
1117          * That is mosty checked in the per-mode stuff but...
1118          *
1119          * For @,B,C  and A without -s, the first device listed must be an md device
1120          * we check that here and open it.
1121          */
1122
1123         if (mode==MANAGE || mode == BUILD || mode == CREATE || mode == GROW ||
1124             (mode == ASSEMBLE && ! scan)) {
1125                 if (devs_found < 1) {
1126                         fprintf(stderr, Name ": an md device must be given in this mode\n");
1127                         exit(2);
1128                 }
1129                 if ((int)ident.super_minor == -2 && autof) {
1130                         fprintf(stderr, Name ": --super-minor=dev is incompatible with --auto\n");
1131                         exit(2);
1132                 }
1133                 if (mode == MANAGE || mode == GROW) {
1134                         mdfd = open_mddev(devlist->devname, 1);
1135                         if (mdfd < 0)
1136                                 exit(1);
1137                 } else
1138                         /* non-existent device is OK */
1139                         mdfd = open_mddev(devlist->devname, 0);
1140                 if (mdfd == -2) {
1141                         fprintf(stderr, Name ": device %s exists but is not an "
1142                                 "md array.\n", devlist->devname);
1143                         exit(1);
1144                 }
1145                 if ((int)ident.super_minor == -2) {
1146                         struct stat stb;
1147                         if (mdfd < 0) {
1148                                 fprintf(stderr, Name ": --super-minor=dev given, and "
1149                                         "listed device %s doesn't exist.\n",
1150                                         devlist->devname);
1151                                 exit(1);
1152                         }
1153                         fstat(mdfd, &stb);
1154                         ident.super_minor = minor(stb.st_rdev);
1155                 }
1156                 if (mdfd >= 0 && mode != MANAGE && mode != GROW) {
1157                         /* We don't really want this open yet, we just might
1158                          * have wanted to check some things
1159                          */
1160                         close(mdfd);
1161                         mdfd = -1;
1162                 }
1163         }
1164
1165         if (raiddisks) {
1166                 if (raiddisks == 1 &&  !force && level != -5) {
1167                         fprintf(stderr, Name ": '1' is an unusual number of drives for an array, so it is probably\n"
1168                                 "     a mistake.  If you really mean it you will need to specify --force before\n"
1169                                 "     setting the number of drives.\n");
1170                         exit(2);
1171                 }
1172         }
1173
1174         if (homehost == NULL)
1175                 homehost = conf_get_homehost(&require_homehost);
1176         if (homehost == NULL || strcmp(homehost, "<system>")==0) {
1177                 if (gethostname(sys_hostname, sizeof(sys_hostname)) == 0) {
1178                         sys_hostname[sizeof(sys_hostname)-1] = 0;
1179                         homehost = sys_hostname;
1180                 }
1181         }
1182
1183         if ((mode != MISC || devmode != 'E') &&
1184             geteuid() != 0) {
1185                 fprintf(stderr, Name ": must be super-user to perform this action\n");
1186                 exit(1);
1187         }
1188
1189         ident.autof = autof;
1190
1191         rv = 0;
1192         switch(mode) {
1193         case MANAGE:
1194                 /* readonly, add/remove, readwrite, runstop */
1195                 if (readonly>0)
1196                         rv = Manage_ro(devlist->devname, mdfd, readonly);
1197                 if (!rv && devs_found>1)
1198                         rv = Manage_subdevs(devlist->devname, mdfd,
1199                                             devlist->next, verbose-quiet, test,
1200                                             update);
1201                 if (!rv && readonly < 0)
1202                         rv = Manage_ro(devlist->devname, mdfd, readonly);
1203                 if (!rv && runstop)
1204                         rv = Manage_runstop(devlist->devname, mdfd, runstop, quiet);
1205                 break;
1206         case ASSEMBLE:
1207                 if (devs_found == 1 && ident.uuid_set == 0 &&
1208                     ident.super_minor == UnSet && ident.name[0] == 0 && !scan ) {
1209                         /* Only a device has been given, so get details from config file */
1210                         struct mddev_ident *array_ident = conf_get_ident(devlist->devname);
1211                         if (array_ident == NULL) {
1212                                 fprintf(stderr, Name ": %s not identified in config file.\n",
1213                                         devlist->devname);
1214                                 rv |= 1;
1215                                 if (mdfd >= 0)
1216                                         close(mdfd);
1217                         } else {
1218                                 if (array_ident->autof == 0)
1219                                         array_ident->autof = autof;
1220                                 rv |= Assemble(ss, devlist->devname, array_ident,
1221                                                NULL, backup_file, invalid_backup,
1222                                                readonly, runstop, update,
1223                                                homehost, require_homehost,
1224                                                verbose-quiet, force);
1225                         }
1226                 } else if (!scan)
1227                         rv = Assemble(ss, devlist->devname, &ident,
1228                                       devlist->next, backup_file, invalid_backup,
1229                                       readonly, runstop, update,
1230                                       homehost, require_homehost,
1231                                       verbose-quiet, force);
1232                 else if (devs_found>0) {
1233                         if (update && devs_found > 1) {
1234                                 fprintf(stderr, Name ": can only update a single array at a time\n");
1235                                 exit(1);
1236                         }
1237                         if (backup_file && devs_found > 1) {
1238                                 fprintf(stderr, Name ": can only assemble a single array when providing a backup file.\n");
1239                                 exit(1);
1240                         }
1241                         for (dv = devlist ; dv ; dv=dv->next) {
1242                                 struct mddev_ident *array_ident = conf_get_ident(dv->devname);
1243                                 if (array_ident == NULL) {
1244                                         fprintf(stderr, Name ": %s not identified in config file.\n",
1245                                                 dv->devname);
1246                                         rv |= 1;
1247                                         continue;
1248                                 }
1249                                 if (array_ident->autof == 0)
1250                                         array_ident->autof = autof;
1251                                 rv |= Assemble(ss, dv->devname, array_ident,
1252                                                NULL, backup_file, invalid_backup,
1253                                                readonly, runstop, update,
1254                                                homehost, require_homehost,
1255                                                verbose-quiet, force);
1256                         }
1257                 } else {
1258                         struct mddev_ident *a, *array_list =  conf_get_ident(NULL);
1259                         struct mddev_dev *devlist = conf_get_devs();
1260                         int cnt = 0;
1261                         int failures, successes;
1262                         if (devlist == NULL) {
1263                                 fprintf(stderr, Name ": No devices listed in conf file were found.\n");
1264                                 exit(1);
1265                         }
1266                         if (update) {
1267                                 fprintf(stderr, Name ": --update not meaningful with a --scan assembly.\n");
1268                                 exit(1);
1269                         }
1270                         if (backup_file) {
1271                                 fprintf(stderr, Name ": --backup_file not meaningful with a --scan assembly.\n");
1272                                 exit(1);
1273                         }
1274                         for (a = array_list; a ; a = a->next) {
1275                                 a->assembled = 0;
1276                                 if (a->autof == 0)
1277                                         a->autof = autof;
1278                         }
1279                         do {
1280                                 failures = 0;
1281                                 successes = 0;
1282                                 rv = 0;
1283                                 for (a = array_list; a ; a = a->next) {
1284                                         int r;
1285                                         if (a->assembled)
1286                                                 continue;
1287                                         if (a->devname &&
1288                                             strcasecmp(a->devname, "<ignore>") == 0)
1289                                                 continue;
1290
1291                                         r = Assemble(ss, a->devname,
1292                                                      a,
1293                                                      NULL, NULL, 0,
1294                                                      readonly, runstop, NULL,
1295                                                      homehost, require_homehost,
1296                                                      verbose-quiet, force);
1297                                         if (r == 0) {
1298                                                 a->assembled = 1;
1299                                                 successes++;
1300                                         } else
1301                                                 failures++;
1302                                         rv |= r;
1303                                         cnt++;
1304                                 }
1305                         } while (failures && successes);
1306                         if (homehost && cnt == 0) {
1307                                 /* Maybe we can auto-assemble something.
1308                                  * Repeatedly call Assemble in auto-assemble mode
1309                                  * until it fails
1310                                  */
1311                                 int rv2;
1312                                 int acnt;
1313                                 ident.autof = autof;
1314                                 do {
1315                                         struct mddev_dev *devlist = conf_get_devs();
1316                                         acnt = 0;
1317                                         do {
1318                                                 rv2 = Assemble(ss, NULL,
1319                                                                &ident,
1320                                                                devlist, NULL, 0,
1321                                                                readonly, runstop, NULL,
1322                                                                homehost, require_homehost,
1323                                                                verbose-quiet, force);
1324                                                 if (rv2==0) {
1325                                                         cnt++;
1326                                                         acnt++;
1327                                                 }
1328                                                 if (rv2 == 1)
1329                                                         /* found something so even though assembly failed  we
1330                                                          * want to avoid auto-updates
1331                                                          */
1332                                                         auto_update_home = 0;
1333                                         } while (rv2!=2);
1334                                         /* Incase there are stacked devices, we need to go around again */
1335                                 } while (acnt);
1336 #if 0
1337                                 if (cnt == 0 && auto_update_home && homehost) {
1338                                         /* Nothing found, maybe we need to bootstrap homehost info */
1339                                         do {
1340                                                 acnt = 0;
1341                                                 do {
1342                                                         rv2 = Assemble(
1343                                                                 ss, NULL,
1344                                                                 &ident,
1345                                                                 NULL, NULL, 0,
1346                                                                 readonly, runstop,
1347                                                                 "homehost",
1348                                                                 homehost,
1349                                                                 require_homehost,
1350                                                                 verbose-quiet, force);
1351                                                         if (rv2==0) {
1352                                                                 cnt++;
1353                                                                 acnt++;
1354                                                         }
1355                                                 } while (rv2!=2);
1356                                                 /* Incase there are stacked devices, we need to go around again */
1357                                         } while (acnt);
1358                                 }
1359 #endif
1360                                 if (cnt == 0 && rv == 0) {
1361                                         fprintf(stderr, Name ": No arrays found in config file or automatically\n");
1362                                         rv = 1;
1363                                 } else if (cnt)
1364                                         rv = 0;
1365                         } else if (cnt == 0 && rv == 0) {
1366                                 fprintf(stderr, Name ": No arrays found in config file\n");
1367                                 rv = 1;
1368                         }
1369                 }
1370                 break;
1371         case BUILD:
1372                 if (delay == 0) delay = DEFAULT_BITMAP_DELAY;
1373                 if (write_behind && !bitmap_file) {
1374                         fprintf(stderr, Name ": write-behind mode requires a bitmap.\n");
1375                         rv = 1;
1376                         break;
1377                 }
1378                 if (raiddisks == 0) {
1379                         fprintf(stderr, Name ": no raid-devices specified.\n");
1380                         rv = 1;
1381                         break;
1382                 }
1383
1384                 if (bitmap_file) {
1385                         if (strcmp(bitmap_file, "internal")==0) {
1386                                 fprintf(stderr, Name ": 'internal' bitmaps not supported with --build\n");
1387                                 rv |= 1;
1388                                 break;
1389                         }
1390                 }
1391                 rv = Build(devlist->devname, chunk, level, layout,
1392                            raiddisks, devlist->next, assume_clean,
1393                            bitmap_file, bitmap_chunk, write_behind,
1394                            delay, verbose-quiet, autof, size);
1395                 break;
1396         case CREATE:
1397                 if (delay == 0) delay = DEFAULT_BITMAP_DELAY;
1398                 if (write_behind && !bitmap_file) {
1399                         fprintf(stderr, Name ": write-behind mode requires a bitmap.\n");
1400                         rv = 1;
1401                         break;
1402                 }
1403                 if (raiddisks == 0) {
1404                         fprintf(stderr, Name ": no raid-devices specified.\n");
1405                         rv = 1;
1406                         break;
1407                 }
1408
1409                 rv = Create(ss, devlist->devname, chunk, level, layout, size<0 ? 0 : size,
1410                             raiddisks, sparedisks, ident.name, homehost,
1411                             ident.uuid_set ? ident.uuid : NULL,
1412                             devs_found-1, devlist->next, runstop, verbose-quiet, force, assume_clean,
1413                             bitmap_file, bitmap_chunk, write_behind, delay, autof);
1414                 break;
1415         case MISC:
1416                 if (devmode == 'E') {
1417                         if (devlist == NULL && !scan) {
1418                                 fprintf(stderr, Name ": No devices to examine\n");
1419                                 exit(2);
1420                         }
1421                         if (devlist == NULL)
1422                                 devlist = conf_get_devs();
1423                         if (devlist == NULL) {
1424                                 fprintf(stderr, Name ": No devices listed in %s\n", configfile?configfile:DefaultConfFile);
1425                                 exit(1);
1426                         }
1427                         if (brief && verbose)
1428                                 brief = 2;
1429                         rv = Examine(devlist, scan?(verbose>1?0:verbose+1):brief,
1430                                      export, scan,
1431                                      SparcAdjust, ss, homehost);
1432                 } else if (devmode == DetailPlatform) {
1433                         rv = Detail_Platform(ss ? ss->ss : NULL, ss ? scan : 1, verbose);
1434                 } else {
1435                         if (devlist == NULL) {
1436                                 if ((devmode=='D' || devmode == Waitclean) && scan) {
1437                                         /* apply --detail or --wait-clean to
1438                                          * all devices in /proc/mdstat
1439                                          */
1440                                         struct mdstat_ent *ms = mdstat_read(0, 1);
1441                                         struct mdstat_ent *e;
1442                                         struct map_ent *map = NULL;
1443                                         int members;
1444                                         int v = verbose>1?0:verbose+1;
1445
1446                                         for (members = 0; members <= 1; members++) {
1447                                         for (e=ms ; e ; e=e->next) {
1448                                                 char *name;
1449                                                 struct map_ent *me;
1450                                                 int member = e->metadata_version &&
1451                                                         strncmp(e->metadata_version,
1452                                                                 "external:/", 10) == 0;
1453                                                 if (members != member)
1454                                                         continue;
1455                                                 me = map_by_devnum(&map, e->devnum);
1456                                                 if (me && me->path
1457                                                     && strcmp(me->path, "/unknown") != 0)
1458                                                         name = me->path;
1459                                                 else
1460                                                         name = get_md_name(e->devnum);
1461
1462                                                 if (!name) {
1463                                                         fprintf(stderr, Name ": cannot find device file for %s\n",
1464                                                                 e->dev);
1465                                                         continue;
1466                                                 }
1467                                                 if (devmode == 'D')
1468                                                         rv |= Detail(name, v,
1469                                                                      export, test,
1470                                                                      homehost);
1471                                                 else
1472                                                         rv |= WaitClean(name, -1, v);
1473                                                 put_md_name(name);
1474                                         }
1475                                         }
1476                                         free_mdstat(ms);
1477                                 } else  if (devmode == 'S' && scan) {
1478                                         /* apply --stop to all devices in /proc/mdstat */
1479                                         /* Due to possible stacking of devices, repeat until
1480                                          * nothing more can be stopped
1481                                          */
1482                                         int progress=1, err;
1483                                         int last = 0;
1484                                         do {
1485                                                 struct mdstat_ent *ms = mdstat_read(0, 0);
1486                                                 struct mdstat_ent *e;
1487
1488                                                 if (!progress) last = 1;
1489                                                 progress = 0; err = 0;
1490                                                 for (e=ms ; e ; e=e->next) {
1491                                                         char *name = get_md_name(e->devnum);
1492
1493                                                         if (!name) {
1494                                                                 fprintf(stderr, Name ": cannot find device file for %s\n",
1495                                                                         e->dev);
1496                                                                 continue;
1497                                                         }
1498                                                         mdfd = open_mddev(name, 1);
1499                                                         if (mdfd >= 0) {
1500                                                                 if (Manage_runstop(name, mdfd, -1, quiet?1:last?0:-1))
1501                                                                         err = 1;
1502                                                                 else
1503                                                                         progress = 1;
1504                                                                 close(mdfd);
1505                                                         }
1506
1507                                                         put_md_name(name);
1508                                                 }
1509                                                 free_mdstat(ms);
1510                                         } while (!last && err);
1511                                         if (err) rv |= 1;
1512                                 } else if (devmode == UdevRules) {
1513                                         rv = Write_rules(udev_filename);
1514                                 } else {
1515                                         fprintf(stderr, Name ": No devices given.\n");
1516                                         exit(2);
1517                                 }
1518                         }
1519                         for (dv=devlist ; dv; dv=dv->next) {
1520                                 switch(dv->disposition) {
1521                                 case 'D':
1522                                         rv |= Detail(dv->devname,
1523                                                      brief?1+verbose:0,
1524                                                      export, test, homehost);
1525                                         continue;
1526                                 case 'K': /* Zero superblock */
1527                                         if (ss)
1528                                                 rv |= Kill(dv->devname, ss, force, quiet,0);
1529                                         else {
1530                                                 int q = quiet;
1531                                                 do {
1532                                                         rv |= Kill(dv->devname, NULL, force, q, 0);
1533                                                         q = 1;
1534                                                 } while (rv == 0);
1535                                                 rv &= ~2;
1536                                         }
1537                                         continue;
1538                                 case 'Q':
1539                                         rv |= Query(dv->devname); continue;
1540                                 case 'X':
1541                                         rv |= ExamineBitmap(dv->devname, brief, ss); continue;
1542                                 case 'W':
1543                                 case WaitOpt:
1544                                         rv |= Wait(dv->devname); continue;
1545                                 case Waitclean:
1546                                         rv |= WaitClean(dv->devname, -1, verbose-quiet); continue;
1547                                 case KillSubarray:
1548                                         rv |= Kill_subarray(dv->devname, subarray, quiet);
1549                                         continue;
1550                                 case UpdateSubarray:
1551                                         if (update == NULL) {
1552                                                 fprintf(stderr,
1553                                                         Name ": -U/--update must be specified with --update-subarray\n");
1554                                                 rv |= 1;
1555                                                 continue;
1556                                         }
1557                                         rv |= Update_subarray(dv->devname, subarray, update, &ident, quiet);
1558                                         continue;
1559                                 }
1560                                 mdfd = open_mddev(dv->devname, 1);
1561                                 if (mdfd>=0) {
1562                                         switch(dv->disposition) {
1563                                         case 'R':
1564                                                 rv |= Manage_runstop(dv->devname, mdfd, 1, quiet); break;
1565                                         case 'S':
1566                                                 rv |= Manage_runstop(dv->devname, mdfd, -1, quiet); break;
1567                                         case 'o':
1568                                                 rv |= Manage_ro(dv->devname, mdfd, 1); break;
1569                                         case 'w':
1570                                                 rv |= Manage_ro(dv->devname, mdfd, -1); break;
1571                                         }
1572                                         close(mdfd);
1573                                 } else
1574                                         rv |= 1;
1575                         }
1576                 }
1577                 break;
1578         case MONITOR:
1579                 if (!devlist && !scan) {
1580                         fprintf(stderr, Name ": Cannot monitor: need --scan or at least one device\n");
1581                         rv = 1;
1582                         break;
1583                 }
1584                 if (pidfile && !daemonise) {
1585                         fprintf(stderr, Name ": Cannot write a pid file when not in daemon mode\n");
1586                         rv = 1;
1587                         break;
1588                 }
1589                 if (delay == 0) {
1590                         if (get_linux_version() > 2006016)
1591                                 /* mdstat responds to poll */
1592                                 delay = 1000;
1593                         else
1594                                 delay = 60;
1595                 }
1596                 rv= Monitor(devlist, mailaddr, program,
1597                             delay?delay:60, daemonise, scan, oneshot,
1598                             dosyslog, test, pidfile, increments, spare_sharing);
1599                 break;
1600
1601         case GROW:
1602                 if (array_size >= 0) {
1603                         /* alway impose array size first, independent of
1604                          * anything else
1605                          * Do not allow level or raid_disks changes at the
1606                          * same time as that can be irreversibly destructive.
1607                          */
1608                         struct mdinfo sra;
1609                         int err;
1610                         if (raiddisks || level != UnSet) {
1611                                 fprintf(stderr, Name ": cannot change array size in same operation "
1612                                         "as changing raiddisks or level.\n"
1613                                         "    Change size first, then check that data is still intact.\n");
1614                                 rv = 1;
1615                                 break;
1616                         }
1617                         sysfs_init(&sra, mdfd, 0);
1618                         if (array_size == 0)
1619                                 err = sysfs_set_str(&sra, NULL, "array_size", "default");
1620                         else
1621                                 err = sysfs_set_num(&sra, NULL, "array_size", array_size / 2);
1622                         if (err < 0) {
1623                                 if (errno == E2BIG)
1624                                         fprintf(stderr, Name ": --array-size setting"
1625                                                 " is too large.\n");
1626                                 else
1627                                         fprintf(stderr, Name ": current kernel does"
1628                                                 " not support setting --array-size\n");
1629                                 rv = 1;
1630                                 break;
1631                         }
1632                 }
1633                 if (devs_found > 1 && raiddisks == 0) {
1634                         /* must be '-a'. */
1635                         if (size >= 0 || chunk || layout_str != NULL || bitmap_file) {
1636                                 fprintf(stderr, Name ": --add cannot be used with "
1637                                         "other geometry changes in --grow mode\n");
1638                                 rv = 1;
1639                                 break;
1640                         }
1641                         for (dv=devlist->next; dv ; dv=dv->next) {
1642                                 rv = Grow_Add_device(devlist->devname, mdfd,
1643                                                      dv->devname);
1644                                 if (rv)
1645                                         break;
1646                         }
1647                 } else if (bitmap_file) {
1648                         if (size >= 0 || raiddisks || chunk ||
1649                             layout_str != NULL || devs_found) {
1650                                 fprintf(stderr, Name ": --bitmap changes cannot be "
1651                                         "used with other geometry changes "
1652                                         "in --grow mode\n");
1653                                 rv = 1;
1654                                 break;
1655                         }
1656                         if (delay == 0)
1657                                 delay = DEFAULT_BITMAP_DELAY;
1658                         rv = Grow_addbitmap(devlist->devname, mdfd, bitmap_file,
1659                                             bitmap_chunk, delay, write_behind, force);
1660                 } else if (size >= 0 || raiddisks != 0 || layout_str != NULL
1661                            || chunk != 0 || level != UnSet) {
1662                         rv = Grow_reshape(devlist->devname, mdfd, quiet, backup_file,
1663                                           size, level, layout_str, chunk, raiddisks,
1664                                           devlist->next,
1665                                           force);
1666                 } else if (array_size < 0)
1667                         fprintf(stderr, Name ": no changes to --grow\n");
1668                 break;
1669         case INCREMENTAL:
1670                 if (rebuild_map) {
1671                         RebuildMap();
1672                 }
1673                 if (scan) {
1674                         if (runstop <= 0) {
1675                                 fprintf(stderr, Name
1676                          ": --incremental --scan meaningless without --run.\n");
1677                                 break;
1678                         }
1679                         if (devmode == 'f') {
1680                                 fprintf(stderr, Name
1681                          ": --incremental --scan --fail not supported.\n");
1682                                 break;
1683                         }
1684                         rv = IncrementalScan(verbose);
1685                 }
1686                 if (!devlist) {
1687                         if (!rebuild_map && !scan) {
1688                                 fprintf(stderr, Name
1689                                         ": --incremental requires a device.\n");
1690                                 rv = 1;
1691                         }
1692                         break;
1693                 }
1694                 if (devlist->next) {
1695                         fprintf(stderr, Name
1696                                ": --incremental can only handle one device.\n");
1697                         rv = 1;
1698                         break;
1699                 }
1700                 if (devmode == 'f')
1701                         rv = IncrementalRemove(devlist->devname, remove_path,
1702                                                verbose-quiet);
1703                 else
1704                         rv = Incremental(devlist->devname, verbose-quiet,
1705                                          runstop, ss, homehost,
1706                                          require_homehost, autof);
1707                 break;
1708         case AUTODETECT:
1709                 autodetect();
1710                 break;
1711         }
1712         exit(rv);
1713 }