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 ident;
  52         char *configfile = NULL;
  53         char *cp;
  54         char *update = NULL;
  55         int scan = 0;
  56         int 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         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
 110         int print_help = 0;
 111         FILE *outf;
 112
 113         int mdfd = -1;
 114
 115         srandom(time(0) ^ getpid());
 116
 117         ident.uuid_set=0;
 118         ident.level = UnSet;
 119         ident.raid_disks = UnSet;
 120         ident.super_minor= UnSet;
 121         ident.devices=0;
 122         ident.spare_group = NULL;
 123         ident.autof = 0;
 124         ident.st = NULL;
 125         ident.bitmap_fd = -1;
 126         ident.bitmap_file = NULL;
 127         ident.name[0] = 0;
 128         ident.container = NULL;
 129         ident.member = NULL;
 130
 131         while ((option_index = -1) ,
 132                (opt=getopt_long(argc, argv,
 133                                 shortopt, long_options,
 134                                 &option_index)) != -1) {
 135                 int newmode = mode;
 136                 /* firstly, some mode-independent options */
 137                 switch(opt) {
 138                 case HelpOptions:
 139                         print_help = 2;
 140                         continue;
 141                 case 'h':
 142                         print_help = 1;
 143                         continue;
 144
 145                 case 'V':
 146                         fputs(Version, stderr);
 147                         exit(0);
 148
 149                 case 'v': verbose++;
 150                         continue;
 151
 152                 case 'q': quiet++;
 153                         continue;
 154
 155                 case 'b':
 156                         if (mode == ASSEMBLE || mode == BUILD || mode == CREATE
 157                             || mode == GROW || mode == INCREMENTAL
 158                             || mode == MANAGE)
 159                                 break; /* b means bitmap */
 160                 case Brief:
 161                         brief = 1;
 162                         continue;
 163
 164                 case 'Y': export++;
 165                         continue;
 166
 167                 case HomeHost:
 168                         if (strcasecmp(optarg, "<ignore>") == 0)
 169                                 require_homehost = 0;
 170                         else
 171                                 homehost = optarg;
 172                         continue;
 173
 174                 case ':':
 175                 case '?':
 176                         fputs(Usage, stderr);
 177                         exit(2);
 178                 }
 179                 /* second, figure out the mode.
 180                  * Some options force the mode.  Others
 181                  * set the mode if it isn't already
 182                  */
 183
 184                 switch(opt) {
 185                 case ManageOpt:
 186                         newmode = MANAGE;
 187                         shortopt = short_bitmap_options;
 188                         break;
 189                 case 'a':
 190                 case Add:
 191                 case 'r':
 192                 case Remove:
 193                 case 'f':
 194                 case Fail:
 195                 case ReAdd: /* re-add */
 196                         if (!mode) {
 197                                 newmode = MANAGE;
 198                                 shortopt = short_bitmap_options;
 199                         }
 200                         break;
 201
 202                 case 'A': newmode = ASSEMBLE; shortopt = short_bitmap_auto_options; break;
 203                 case 'B': newmode = BUILD; shortopt = short_bitmap_auto_options; break;
 204                 case 'C': newmode = CREATE; shortopt = short_bitmap_auto_options; break;
 205                 case 'F': newmode = MONITOR;break;
 206                 case 'G': newmode = GROW;
 207                         shortopt = short_bitmap_options;
 208                         break;
 209                 case 'I': newmode = INCREMENTAL;
 210                         shortopt = short_bitmap_auto_options; break;
 211                 case AutoDetect:
 212                         newmode = AUTODETECT; break;
 213
 214                 case MiscOpt:
 215                 case 'D':
 216                 case 'E':
 217                 case 'X':
 218                 case 'Q': newmode = MISC; break;
 219                 case 'R':
 220                 case 'S':
 221                 case 'o':
 222                 case 'w':
 223                 case 'W':
 224                 case WaitOpt:
 225                 case Waitclean:
 226                 case DetailPlatform:
 227                 case KillSubarray:
 228                 case UpdateSubarray:
 229                         if (opt == KillSubarray || opt == UpdateSubarray) {
 230                                 if (subarray) {
 231                                         fprintf(stderr, Name ": subarray can only"
 232                                                 " be specified once\n");
 233                                         exit(2);
 234                                 }
 235                                 subarray = optarg;
 236                         }
 237                 case 'K': if (!mode) newmode = MISC; break;
 238                 case NoSharing: newmode = MONITOR; break;
 239                 }
 240                 if (mode && newmode == mode) {
 241                         /* everybody happy ! */
 242                 } else if (mode && newmode != mode) {
 243                         /* not allowed.. */
 244                         fprintf(stderr, Name ": ");
 245                         if (option_index >= 0)
 246                                 fprintf(stderr, "--%s", long_options[option_index].name);
 247                         else
 248                                 fprintf(stderr, "-%c", opt);
 249                         fprintf(stderr, " would set mdadm mode to \"%s\", but it is already set to \"%s\".\n",
 250                                 map_num(modes, newmode),
 251                                 map_num(modes, mode));
 252                         exit(2);
 253                 } else if (!mode && newmode) {
 254                         mode = newmode;
 255                 } else {
 256                         /* special case of -c --help */
 257                         if ((opt == 'c' || opt == ConfigFile) &&
 258                             ( strncmp(optarg, "--h", 3)==0 ||
 259                               strncmp(optarg, "-h", 2)==0)) {
 260                                 fputs(Help_config, stdout);
 261                                 exit(0);
 262                         }
 263
 264                         /* If first option is a device, don't force the mode yet */
 265                         if (opt == 1) {
 266                                 if (devs_found == 0) {
 267                                         dv = malloc(sizeof(*dv));
 268                                         if (dv == NULL) {
 269                                                 fprintf(stderr, Name ": malloc failed\n");
 270                                                 exit(3);
 271                                         }
 272                                         dv->devname = optarg;
 273                                         dv->disposition = devmode;
 274                                         dv->writemostly = writemostly;
 275                                         dv->re_add = re_add;
 276                                         dv->used = 0;
 277                                         dv->next = NULL;
 278                                         *devlistend = dv;
 279                                         devlistend = &dv->next;
 280
 281                                         devs_found++;
 282                                         continue;
 283                                 }
 284                                 /* No mode yet, and this is the second device ... */
 285                                 fprintf(stderr, Name ": An option must be given to set the mode before a second device\n"
 286                                         "       (%s) is listed\n", optarg);
 287                                 exit(2);
 288                         }
 289                         if (option_index >= 0)
 290                                 fprintf(stderr, Name ": --%s", long_options[option_index].name);
 291                         else
 292                                 fprintf(stderr, Name ": -%c", opt);
 293                         fprintf(stderr, " does not set the mode, and so cannot be the first option.\n");
 294                         exit(2);
 295                 }
 296
 297                 /* if we just set the mode, then done */
 298                 switch(opt) {
 299                 case ManageOpt:
 300                 case MiscOpt:
 301                 case 'A':
 302                 case 'B':
 303                 case 'C':
 304                 case 'F':
 305                 case 'G':
 306                 case 'I':
 307                 case AutoDetect:
 308                         continue;
 309                 }
 310                 if (opt == 1) {
 311                         /* an undecorated option - must be a device name.
 312                          */
 313                         if (devs_found > 0 && mode == MANAGE && !devmode) {
 314                                 fprintf(stderr, Name ": Must give one of -a/-r/-f"
 315                                         " for subsequent devices at %s\n", optarg);
 316                                 exit(2);
 317                         }
 318                         if (devs_found > 0 && mode == GROW && !devmode) {
 319                                 fprintf(stderr, Name ": Must give -a/--add for"
 320                                         " devices to add: %s\n", optarg);
 321                                 exit(2);
 322                         }
 323                         dv = malloc(sizeof(*dv));
 324                         if (dv == NULL) {
 325                                 fprintf(stderr, Name ": malloc failed\n");
 326                                 exit(3);
 327                         }
 328                         dv->devname = optarg;
 329                         dv->disposition = devmode;
 330                         dv->writemostly = writemostly;
 331                         dv->re_add = re_add;
 332                         dv->used = 0;
 333                         dv->next = NULL;
 334                         *devlistend = dv;
 335                         devlistend = &dv->next;
 336
 337                         devs_found++;
 338                         continue;
 339                 }
 340
 341                 /* We've got a mode, and opt is now something else which
 342                  * could depend on the mode */
 343 #define O(a,b) ((a<<16)|b)
 344                 switch (O(mode,opt)) {
 345                 case O(GROW,'c'):
 346                 case O(GROW,ChunkSize):
 347                 case O(CREATE,'c'):
 348                 case O(CREATE,ChunkSize):
 349                 case O(BUILD,'c'): /* chunk or rounding */
 350                 case O(BUILD,ChunkSize): /* chunk or rounding */
 351                         if (chunk) {
 352                                 fprintf(stderr, Name ": chunk/rounding may only be specified once. "
 353                                         "Second value is %s.\n", optarg);
 354                                 exit(2);
 355                         }
 356                         chunk = strtol(optarg, &c, 10);
 357                         if (!optarg[0] || *c || chunk<4 || ((chunk-1)&chunk)) {
 358                                 fprintf(stderr, Name ": invalid chunk/rounding value: %s\n",
 359                                         optarg);
 360                                 exit(2);
 361                         }
 362                         continue;
 363
 364 #if 0
 365                 case O(ASSEMBLE,AutoHomeHost):
 366                         auto_update_home = 1;
 367                         continue;
 368 #endif
 369                 case O(INCREMENTAL, 'e'):
 370                 case O(CREATE,'e'):
 371                 case O(ASSEMBLE,'e'):
 372                 case O(MISC,'e'): /* set metadata (superblock) information */
 373                         if (ss) {
 374                                 fprintf(stderr, Name ": metadata information already given\n");
 375                                 exit(2);
 376                         }
 377                         for(i=0; !ss && superlist[i]; i++)
 378                                 ss = superlist[i]->match_metadata_desc(optarg);
 379
 380                         if (!ss) {
 381                                 fprintf(stderr, Name ": unrecognised metadata identifier: %s\n", optarg);
 382                                 exit(2);
 383                         }
 384                         max_disks = ss->max_devs;
 385                         continue;
 386
 387                 case O(MANAGE,'W'):
 388                 case O(MANAGE,WriteMostly):
 389                 case O(BUILD,'W'):
 390                 case O(BUILD,WriteMostly):
 391                 case O(CREATE,'W'):
 392                 case O(CREATE,WriteMostly):
 393                         /* set write-mostly for following devices */
 394                         writemostly = 1;
 395                         continue;
 396
 397                 case O(MANAGE,'w'):
 398                         /* clear write-mostly for following devices */
 399                         writemostly = 2;
 400                         continue;
 401
 402
 403                 case O(GROW,'z'):
 404                 case O(CREATE,'z'):
 405                 case O(BUILD,'z'): /* size */
 406                         if (size >= 0) {
 407                                 fprintf(stderr, Name ": size may only be specified once. "
 408                                         "Second value is %s.\n", optarg);
 409                                 exit(2);
 410                         }
 411                         if (strcmp(optarg, "max")==0)
 412                                 size = 0;
 413                         else {
 414                                 size = parse_size(optarg);
 415                                 if (size < 8) {
 416                                         fprintf(stderr, Name ": invalid size: %s\n",
 417                                                 optarg);
 418                                         exit(2);
 419                                 }
 420                                 /* convert sectors to K */
 421                                 size /= 2;
 422                         }
 423                         continue;
 424
 425                 case O(GROW,'Z'): /* array size */
 426                         if (array_size >= 0) {
 427                                 fprintf(stderr, Name ": array-size may only be specified once. "
 428                                         "Second value is %s.\n", optarg);
 429                                 exit(2);
 430                         }
 431                         if (strcmp(optarg, "max") == 0)
 432                                 array_size = 0;
 433                         else {
 434                                 array_size = parse_size(optarg);
 435                                 if (array_size <= 0) {
 436                                         fprintf(stderr, Name ": invalid array size: %s\n",
 437                                                 optarg);
 438                                         exit(2);
 439                                 }
 440                         }
 441                         continue;
 442
 443                 case O(GROW,'l'):
 444                 case O(CREATE,'l'):
 445                 case O(BUILD,'l'): /* set raid level*/
 446                         if (level != UnSet) {
 447                                 fprintf(stderr, Name ": raid level may only be set once.  "
 448                                         "Second value is %s.\n", optarg);
 449                                 exit(2);
 450                         }
 451                         level = map_name(pers, optarg);
 452                         if (level == UnSet) {
 453                                 fprintf(stderr, Name ": invalid raid level: %s\n",
 454                                         optarg);
 455                                 exit(2);
 456                         }
 457                         if (level != 0 && level != LEVEL_LINEAR && level != 1 &&
 458                             level != LEVEL_MULTIPATH && level != LEVEL_FAULTY &&
 459                             level != 10 &&
 460                             mode == BUILD) {
 461                                 fprintf(stderr, Name ": Raid level %s not permitted with --build.\n",
 462                                         optarg);
 463                                 exit(2);
 464                         }
 465                         if (sparedisks > 0 && level < 1 && level >= -1) {
 466                                 fprintf(stderr, Name ": raid level %s is incompatible with spare-devices setting.\n",
 467                                         optarg);
 468                                 exit(2);
 469                         }
 470                         ident.level = level;
 471                         continue;
 472
 473                 case O(GROW, 'p'): /* new layout */
 474                 case O(GROW, Layout):
 475                         if (layout_str) {
 476                                 fprintf(stderr,Name ": layout may only be sent once.  "
 477                                         "Second value was %s\n", optarg);
 478                                 exit(2);
 479                         }
 480                         layout_str = optarg;
 481                         /* 'Grow' will parse the value */
 482                         continue;
 483
 484                 case O(CREATE,'p'): /* raid5 layout */
 485                 case O(CREATE,Layout):
 486                 case O(BUILD,'p'): /* faulty layout */
 487                 case O(BUILD,Layout):
 488                         if (layout != UnSet) {
 489                                 fprintf(stderr,Name ": layout may only be sent once.  "
 490                                         "Second value was %s\n", optarg);
 491                                 exit(2);
 492                         }
 493                         switch(level) {
 494                         default:
 495                                 fprintf(stderr, Name ": layout not meaningful for %s arrays.\n",
 496                                         map_num(pers, level));
 497                                 exit(2);
 498                         case UnSet:
 499                                 fprintf(stderr, Name ": raid level must be given before layout.\n");
 500                                 exit(2);
 501
 502                         case 5:
 503                                 layout = map_name(r5layout, optarg);
 504                                 if (layout==UnSet) {
 505                                         fprintf(stderr, Name ": layout %s not understood for raid5.\n",
 506                                                 optarg);
 507                                         exit(2);
 508                                 }
 509                                 break;
 510                         case 6:
 511                                 layout = map_name(r6layout, optarg);
 512                                 if (layout==UnSet) {
 513                                         fprintf(stderr, Name ": layout %s not understood for raid6.\n",
 514                                                 optarg);
 515                                         exit(2);
 516                                 }
 517                                 break;
 518
 519                         case 10:
 520                                 layout = parse_layout_10(optarg);
 521                                 if (layout < 0) {
 522                                         fprintf(stderr, Name ": layout for raid10 must be 'nNN', 'oNN' or 'fNN' where NN is a number, not %s\n", optarg);
 523                                         exit(2);
 524                                 }
 525                                 break;
 526                         case LEVEL_FAULTY:
 527                                 /* Faulty
 528                                  * modeNNN
 529                                  */
 530                                 layout = parse_layout_faulty(optarg);
 531                                 if (layout == -1) {
 532                                         fprintf(stderr, Name ": layout %s not understood for faulty.\n",
 533                                                 optarg);
 534                                         exit(2);
 535                                 }
 536                                 break;
 537                         }
 538                         continue;
 539
 540                 case O(CREATE,AssumeClean):
 541                 case O(BUILD,AssumeClean): /* assume clean */
 542                         assume_clean = 1;
 543                         continue;
 544
 545                 case O(GROW,'n'):
 546                 case O(CREATE,'n'):
 547                 case O(BUILD,'n'): /* number of raid disks */
 548                         if (raiddisks) {
 549                                 fprintf(stderr, Name ": raid-devices set twice: %d and %s\n",
 550                                         raiddisks, optarg);
 551                                 exit(2);
 552                         }
 553                         raiddisks = strtol(optarg, &c, 10);
 554                         if (!optarg[0] || *c || raiddisks<=0) {
 555                                 fprintf(stderr, Name ": invalid number of raid devices: %s\n",
 556                                         optarg);
 557                                 exit(2);
 558                         }
 559                         ident.raid_disks = raiddisks;
 560                         continue;
 561
 562                 case O(CREATE,'x'): /* number of spare (eXtra) discs */
 563                         if (sparedisks) {
 564                                 fprintf(stderr,Name ": spare-devices set twice: %d and %s\n",
 565                                         sparedisks, optarg);
 566                                 exit(2);
 567                         }
 568                         if (level != UnSet && level <= 0 && level >= -1) {
 569                                 fprintf(stderr, Name ": spare-devices setting is incompatible with raid level %d\n",
 570                                         level);
 571                                 exit(2);
 572                         }
 573                         sparedisks = strtol(optarg, &c, 10);
 574                         if (!optarg[0] || *c || sparedisks < 0) {
 575                                 fprintf(stderr, Name ": invalid number of spare-devices: %s\n",
 576                                         optarg);
 577                                 exit(2);
 578                         }
 579                         continue;
 580
 581                 case O(CREATE,'a'):
 582                 case O(CREATE,Auto):
 583                 case O(BUILD,'a'):
 584                 case O(BUILD,Auto):
 585                 case O(INCREMENTAL,'a'):
 586                 case O(INCREMENTAL,Auto):
 587                 case O(ASSEMBLE,'a'):
 588                 case O(ASSEMBLE,Auto): /* auto-creation of device node */
 589                         autof = parse_auto(optarg, "--auto flag", 0);
 590                         continue;
 591
 592                 case O(CREATE,Symlinks):
 593                 case O(BUILD,Symlinks):
 594                 case O(ASSEMBLE,Symlinks): /* auto creation of symlinks in /dev to /dev/md */
 595                         symlinks = optarg;
 596                         continue;
 597
 598                 case O(BUILD,'f'): /* force honouring '-n 1' */
 599                 case O(BUILD,Force): /* force honouring '-n 1' */
 600                 case O(GROW,'f'): /* ditto */
 601                 case O(GROW,Force): /* ditto */
 602                 case O(CREATE,'f'): /* force honouring of device list */
 603                 case O(CREATE,Force): /* force honouring of device list */
 604                 case O(ASSEMBLE,'f'): /* force assembly */
 605                 case O(ASSEMBLE,Force): /* force assembly */
 606                 case O(MISC,'f'): /* force zero */
 607                 case O(MISC,Force): /* force zero */
 608                         force=1;
 609                         continue;
 610
 611                         /* now for the Assemble options */
 612                 case O(CREATE,'u'): /* uuid of array */
 613                 case O(ASSEMBLE,'u'): /* uuid of array */
 614                         if (ident.uuid_set) {
 615                                 fprintf(stderr, Name ": uuid cannot be set twice.  "
 616                                         "Second value %s.\n", optarg);
 617                                 exit(2);
 618                         }
 619                         if (parse_uuid(optarg, ident.uuid))
 620                                 ident.uuid_set = 1;
 621                         else {
 622                                 fprintf(stderr,Name ": Bad uuid: %s\n", optarg);
 623                                 exit(2);
 624                         }
 625                         continue;
 626
 627                 case O(CREATE,'N'):
 628                 case O(ASSEMBLE,'N'):
 629                 case O(MISC,'N'):
 630                         if (ident.name[0]) {
 631                                 fprintf(stderr, Name ": name cannot be set twice.   "
 632                                         "Second value %s.\n", optarg);
 633                                 exit(2);
 634                         }
 635                         if (mode == MISC && !subarray) {
 636                                 fprintf(stderr, Name ": -N/--name only valid with --update-subarray in misc mode\n");
 637                                 exit(2);
 638                         }
 639                         if (strlen(optarg) > 32) {
 640                                 fprintf(stderr, Name ": name '%s' is too long, 32 chars max.\n",
 641                                         optarg);
 642                                 exit(2);
 643                         }
 644                         strcpy(ident.name, optarg);
 645                         continue;
 646
 647                 case O(ASSEMBLE,'m'): /* super-minor for array */
 648                 case O(ASSEMBLE,SuperMinor):
 649                         if (ident.super_minor != UnSet) {
 650                                 fprintf(stderr, Name ": super-minor cannot be set twice.  "
 651                                         "Second value: %s.\n", optarg);
 652                                 exit(2);
 653                         }
 654                         if (strcmp(optarg, "dev")==0)
 655                                 ident.super_minor = -2;
 656                         else {
 657                                 ident.super_minor = strtoul(optarg, &cp, 10);
 658                                 if (!optarg[0] || *cp) {
 659                                         fprintf(stderr, Name ": Bad super-minor number: %s.\n", optarg);
 660                                         exit(2);
 661                                 }
 662                         }
 663                         continue;
 664
 665                 case O(ASSEMBLE,'U'): /* update the superblock */
 666                 case O(MISC,'U'):
 667                         if (update) {
 668                                 fprintf(stderr, Name ": Can only update one aspect of superblock, both %s and %s given.\n",
 669                                         update, optarg);
 670                                 exit(2);
 671                         }
 672                         if (mode == MISC && !subarray) {
 673                                 fprintf(stderr, Name ": Only subarrays can be updated in misc mode\n");
 674                                 exit(2);
 675                         }
 676                         update = optarg;
 677                         if (strcmp(update, "sparc2.2")==0)
 678                                 continue;
 679                         if (strcmp(update, "super-minor") == 0)
 680                                 continue;
 681                         if (strcmp(update, "summaries")==0)
 682                                 continue;
 683                         if (strcmp(update, "resync")==0)
 684                                 continue;
 685                         if (strcmp(update, "uuid")==0)
 686                                 continue;
 687                         if (strcmp(update, "name")==0)
 688                                 continue;
 689                         if (strcmp(update, "homehost")==0)
 690                                 continue;
 691                         if (strcmp(update, "devicesize")==0)
 692                                 continue;
 693                         if (strcmp(update, "byteorder")==0) {
 694                                 if (ss) {
 695                                         fprintf(stderr, Name ": must not set metadata type with --update=byteorder.\n");
 696                                         exit(2);
 697                                 }
 698                                 for(i=0; !ss && superlist[i]; i++)
 699                                         ss = superlist[i]->match_metadata_desc("0.swap");
 700                                 if (!ss) {
 701                                         fprintf(stderr, Name ": INTERNAL ERROR cannot find 0.swap\n");
 702                                         exit(2);
 703                                 }
 704
 705                                 continue;
 706                         }
 707                         if (strcmp(update,"?") == 0 ||
 708                             strcmp(update, "help") == 0) {
 709                                 outf = stdout;
 710                                 fprintf(outf, Name ": ");
 711                         } else {
 712                                 outf = stderr;
 713                                 fprintf(outf,
 714                                         Name ": '--update=%s' is invalid.  ",
 715                                         update);
 716                         }
 717                         fprintf(outf, "Valid --update options are:\n"
 718                 "     'sparc2.2', 'super-minor', 'uuid', 'name', 'resync',\n"
 719                 "     'summaries', 'homehost', 'byteorder', 'devicesize'.\n");
 720                         exit(outf == stdout ? 0 : 2);
 721
 722                 case O(INCREMENTAL,NoDegraded):
 723                         fprintf(stderr, Name ": --no-degraded is deprecated in Incremental mode\n");
 724                 case O(ASSEMBLE,NoDegraded): /* --no-degraded */
 725                         runstop = -1; /* --stop isn't allowed for --assemble,
 726                                        * so we overload slightly */
 727                         continue;
 728
 729                 case O(ASSEMBLE,'c'):
 730                 case O(ASSEMBLE,ConfigFile):
 731                 case O(INCREMENTAL, 'c'):
 732                 case O(INCREMENTAL, ConfigFile):
 733                 case O(MISC, 'c'):
 734                 case O(MISC, ConfigFile):
 735                 case O(MONITOR,'c'):
 736                 case O(MONITOR,ConfigFile):
 737                         if (configfile) {
 738                                 fprintf(stderr, Name ": configfile cannot be set twice.  "
 739                                         "Second value is %s.\n", optarg);
 740                                 exit(2);
 741                         }
 742                         configfile = optarg;
 743                         set_conffile(configfile);
 744                         /* FIXME possibly check that config file exists.  Even parse it */
 745                         continue;
 746                 case O(ASSEMBLE,'s'): /* scan */
 747                 case O(MISC,'s'):
 748                 case O(MONITOR,'s'):
 749                 case O(INCREMENTAL,'s'):
 750                         scan = 1;
 751                         continue;
 752
 753                 case O(MONITOR,'m'): /* mail address */
 754                 case O(MONITOR,EMail):
 755                         if (mailaddr)
 756                                 fprintf(stderr, Name ": only specify one mailaddress. %s ignored.\n",
 757                                         optarg);
 758                         else
 759                                 mailaddr = optarg;
 760                         continue;
 761
 762                 case O(MONITOR,'p'): /* alert program */
 763                 case O(MONITOR,ProgramOpt): /* alert program */
 764                         if (program)
 765                                 fprintf(stderr, Name ": only specify one alter program. %s ignored.\n",
 766                                         optarg);
 767                         else
 768                                 program = optarg;
 769                         continue;
 770
 771                 case O(MONITOR,'r'): /* rebuild increments */
 772                 case O(MONITOR,Increment):
 773                         increments = atoi(optarg);
 774                         if (increments>99 || increments<1) {
 775                                 fprintf(stderr, Name ": please specify positive integer between 1 and 99 as rebuild increments.\n");
 776                                 exit(2);
 777                         }
 778                         continue;
 779
 780                 case O(MONITOR,'d'): /* delay in seconds */
 781                 case O(GROW, 'd'):
 782                 case O(BUILD,'d'): /* delay for bitmap updates */
 783                 case O(CREATE,'d'):
 784                         if (delay)
 785                                 fprintf(stderr, Name ": only specify delay once. %s ignored.\n",
 786                                         optarg);
 787                         else {
 788                                 delay = strtol(optarg, &c, 10);
 789                                 if (!optarg[0] || *c || delay<1) {
 790                                         fprintf(stderr, Name ": invalid delay: %s\n",
 791                                                 optarg);
 792                                         exit(2);
 793                                 }
 794                         }
 795                         continue;
 796                 case O(MONITOR,'f'): /* daemonise */
 797                 case O(MONITOR,Fork):
 798                         daemonise = 1;
 799                         continue;
 800                 case O(MONITOR,'i'): /* pid */
 801                         if (pidfile)
 802                                 fprintf(stderr, Name ": only specify one pid file. %s ignored.\n",
 803                                         optarg);
 804                         else
 805                                 pidfile = optarg;
 806                         continue;
 807                 case O(MONITOR,'1'): /* oneshot */
 808                         oneshot = 1;
 809                         continue;
 810                 case O(MONITOR,'t'): /* test */
 811                         test = 1;
 812                         continue;
 813                 case O(MONITOR,'y'): /* log messages to syslog */
 814                         openlog("mdadm", LOG_PID, SYSLOG_FACILITY);
 815                         dosyslog = 1;
 816                         continue;
 817                 case O(MONITOR, NoSharing):
 818                         spare_sharing = 0;
 819                         continue;
 820                         /* now the general management options.  Some are applicable
 821                          * to other modes. None have arguments.
 822                          */
 823                 case O(GROW,'a'):
 824                 case O(GROW,Add):
 825                 case O(MANAGE,'a'):
 826                 case O(MANAGE,Add): /* add a drive */
 827                         devmode = 'a';
 828                         re_add = 0;
 829                         continue;
 830                 case O(MANAGE,ReAdd):
 831                         devmode = 'a';
 832                         re_add = 1;
 833                         continue;
 834                 case O(MANAGE,'r'): /* remove a drive */
 835                 case O(MANAGE,Remove):
 836                         devmode = 'r';
 837                         continue;
 838                 case O(MANAGE,'f'): /* set faulty */
 839                 case O(MANAGE,Fail):
 840                 case O(INCREMENTAL,'f'):
 841                 case O(INCREMENTAL,Remove):
 842                 case O(INCREMENTAL,Fail): /* r for incremental is taken, use f
 843                                           * even though we will both fail and
 844                                           * remove the device */
 845                         devmode = 'f';
 846                         continue;
 847                 case O(INCREMENTAL,'R'):
 848                 case O(MANAGE,'R'):
 849                 case O(ASSEMBLE,'R'):
 850                 case O(BUILD,'R'):
 851                 case O(CREATE,'R'): /* Run the array */
 852                         if (runstop < 0) {
 853                                 fprintf(stderr, Name ": Cannot both Stop and Run an array\n");
 854                                 exit(2);
 855                         }
 856                         runstop = 1;
 857                         continue;
 858                 case O(MANAGE,'S'):
 859                         if (runstop > 0) {
 860                                 fprintf(stderr, Name ": Cannot both Run and Stop an array\n");
 861                                 exit(2);
 862                         }
 863                         runstop = -1;
 864                         continue;
 865                 case O(MANAGE,'t'):
 866                         test = 1;
 867                         continue;
 868
 869                 case O(MISC,'Q'):
 870                 case O(MISC,'D'):
 871                 case O(MISC,'E'):
 872                 case O(MISC,'K'):
 873                 case O(MISC,'R'):
 874                 case O(MISC,'S'):
 875                 case O(MISC,'X'):
 876                 case O(MISC,'o'):
 877                 case O(MISC,'w'):
 878                 case O(MISC,'W'):
 879                 case O(MISC, WaitOpt):
 880                 case O(MISC, Waitclean):
 881                 case O(MISC, DetailPlatform):
 882                 case O(MISC, KillSubarray):
 883                 case O(MISC, UpdateSubarray):
 884                         if (devmode && devmode != opt &&
 885                             (devmode == 'E' || (opt == 'E' && devmode != 'Q'))) {
 886                                 fprintf(stderr, Name ": --examine/-E cannot be given with ");
 887                                 if (devmode == 'E') {
 888                                         if (option_index >= 0)
 889                                                 fprintf(stderr, "--%s\n",
 890                                                         long_options[option_index].name);
 891                                         else
 892                                                 fprintf(stderr, "-%c\n", opt);
 893                                 } else if (isalpha(devmode))
 894                                         fprintf(stderr, "-%c\n", devmode);
 895                                 else
 896                                         fprintf(stderr, "previous option\n");
 897                                 exit(2);
 898                         }
 899                         devmode = opt;
 900                         continue;
 901                 case O(MISC,'t'):
 902                         test = 1;
 903                         continue;
 904
 905                 case O(MISC, Sparc22):
 906                         if (devmode != 'E') {
 907                                 fprintf(stderr, Name ": --sparc2.2 only allowed with --examine\n");
 908                                 exit(2);
 909                         }
 910                         SparcAdjust = 1;
 911                         continue;
 912
 913                 case O(ASSEMBLE,'b'): /* here we simply set the bitmap file */
 914                 case O(ASSEMBLE,Bitmap):
 915                         if (!optarg) {
 916                                 fprintf(stderr, Name ": bitmap file needed with -b in --assemble mode\n");
 917                                 exit(2);
 918                         }
 919                         if (strcmp(optarg, "internal")==0) {
 920                                 fprintf(stderr, Name ": there is no need to specify --bitmap when assembling arrays with internal bitmaps\n");
 921                                 continue;
 922                         }
 923                         bitmap_fd = open(optarg, O_RDWR);
 924                         if (!*optarg || bitmap_fd < 0) {
 925                                 fprintf(stderr, Name ": cannot open bitmap file %s: %s\n", optarg, strerror(errno));
 926                                 exit(2);
 927                         }
 928                         ident.bitmap_fd = bitmap_fd; /* for Assemble */
 929                         continue;
 930
 931                 case O(ASSEMBLE, BackupFile):
 932                 case O(GROW, BackupFile):
 933                         /* Specify a file into which grow might place a backup,
 934                          * or from which assemble might recover a backup
 935                          */
 936                         if (backup_file) {
 937                                 fprintf(stderr, Name ": backup file already specified, rejecting %s\n", optarg);
 938                                 exit(2);
 939                         }
 940                         backup_file = optarg;
 941                         continue;
 942
 943                 case O(BUILD,'b'):
 944                 case O(BUILD,Bitmap):
 945                 case O(CREATE,'b'):
 946                 case O(CREATE,Bitmap): /* here we create the bitmap */
 947                         if (strcmp(optarg, "none") == 0) {
 948                                 fprintf(stderr, Name ": '--bitmap none' only"
 949                                         " support for --grow\n");
 950                                 exit(2);
 951                         }
 952                         /* FALL THROUGH */
 953                 case O(GROW,'b'):
 954                 case O(GROW,Bitmap):
 955                         if (strcmp(optarg, "internal")== 0 ||
 956                             strcmp(optarg, "none")== 0 ||
 957                             strchr(optarg, '/') != NULL) {
 958                                 bitmap_file = optarg;
 959                                 continue;
 960                         }
 961                         /* probable typo */
 962                         fprintf(stderr, Name ": bitmap file must contain a '/', or be 'internal', or 'none'\n"
 963                                 "       not '%s'\n", optarg);
 964                         exit(2);
 965
 966                 case O(GROW,BitmapChunk):
 967                 case O(BUILD,BitmapChunk):
 968                 case O(CREATE,BitmapChunk): /* bitmap chunksize */
 969                         bitmap_chunk = strtol(optarg, &c, 10);
 970                         if (!optarg[0] || *c || bitmap_chunk < 0 ||
 971                                         bitmap_chunk & (bitmap_chunk - 1)) {
 972                                 fprintf(stderr, Name ": invalid bitmap chunksize: %s\n",
 973                                                 optarg);
 974                                 exit(2);
 975                         }
 976                         /* convert K to B, chunk of 0K means 512B */
 977                         bitmap_chunk = bitmap_chunk ? bitmap_chunk * 1024 : 512;
 978                         continue;
 979
 980                 case O(GROW, WriteBehind):
 981                 case O(BUILD, WriteBehind):
 982                 case O(CREATE, WriteBehind): /* write-behind mode */
 983                         write_behind = DEFAULT_MAX_WRITE_BEHIND;
 984                         if (optarg) {
 985                                 write_behind = strtol(optarg, &c, 10);
 986                                 if (write_behind < 0 || *c ||
 987                                     write_behind > 16383) {
 988                                         fprintf(stderr, Name ": Invalid value for maximum outstanding write-behind writes: %s.\n\tMust be between 0 and 16383.\n", optarg);
 989                                         exit(2);
 990                                 }
 991                         }
 992                         continue;
 993
 994                 case O(INCREMENTAL, 'r'):
 995                 case O(INCREMENTAL, RebuildMapOpt):
 996                         rebuild_map = 1;
 997                         continue;
 998                 case O(INCREMENTAL, IncrementalPath):
 999                         remove_path = optarg;
1000                         continue;
1001                 }
1002                 /* We have now processed all the valid options. Anything else is
1003                  * an error
1004                  */
1005                 if (option_index > 0)
1006                         fprintf(stderr, Name ":option --%s not valid in %s mode\n",
1007                                 long_options[option_index].name,
1008                                 map_num(modes, mode));
1009                 else
1010                         fprintf(stderr, Name ": option -%c not valid in %s mode\n",
1011                                 opt, map_num(modes, mode));
1012                 exit(2);
1013
1014         }
1015
1016         if (print_help) {
1017                 char *help_text = Help;
1018                 if (print_help == 2)
1019                         help_text = OptionHelp;
1020                 else
1021                         switch (mode) {
1022                         case ASSEMBLE : help_text = Help_assemble; break;
1023                         case BUILD    : help_text = Help_build; break;
1024                         case CREATE   : help_text = Help_create; break;
1025                         case MANAGE   : help_text = Help_manage; break;
1026                         case MISC     : help_text = Help_misc; break;
1027                         case MONITOR  : help_text = Help_monitor; break;
1028                         case GROW     : help_text = Help_grow; break;
1029                         case INCREMENTAL:help_text= Help_incr; break;
1030                         }
1031                 fputs(help_text,stdout);
1032                 exit(0);
1033         }
1034
1035         if (!mode && devs_found) {
1036                 mode = MISC;
1037                 devmode = 'Q';
1038                 if (devlist->disposition == 0)
1039                         devlist->disposition = devmode;
1040         }
1041         if (!mode) {
1042                 fputs(Usage, stderr);
1043                 exit(2);
1044         }
1045
1046         if (symlinks) {
1047                 struct createinfo *ci = conf_get_create_info();
1048
1049                 if (strcasecmp(symlinks, "yes") == 0)
1050                         ci->symlinks = 1;
1051                 else if (strcasecmp(symlinks, "no") == 0)
1052                         ci->symlinks = 0;
1053                 else {
1054                         fprintf(stderr, Name ": option --symlinks must be 'no' or 'yes'\n");
1055                         exit(2);
1056                 }
1057         }
1058         /* Ok, got the option parsing out of the way
1059          * hopefully it's mostly right but there might be some stuff
1060          * missing
1061          *
1062          * That is mosty checked in the per-mode stuff but...
1063          *
1064          * For @,B,C  and A without -s, the first device listed must be an md device
1065          * we check that here and open it.
1066          */
1067
1068         if (mode==MANAGE || mode == BUILD || mode == CREATE || mode == GROW ||
1069             (mode == ASSEMBLE && ! scan)) {
1070                 if (devs_found < 1) {
1071                         fprintf(stderr, Name ": an md device must be given in this mode\n");
1072                         exit(2);
1073                 }
1074                 if ((int)ident.super_minor == -2 && autof) {
1075                         fprintf(stderr, Name ": --super-minor=dev is incompatible with --auto\n");
1076                         exit(2);
1077                 }
1078                 if (mode == MANAGE || mode == GROW) {
1079                         mdfd = open_mddev(devlist->devname, 1);
1080                         if (mdfd < 0)
1081                                 exit(1);
1082                 } else
1083                         /* non-existent device is OK */
1084                         mdfd = open_mddev(devlist->devname, 0);
1085                 if (mdfd == -2) {
1086                         fprintf(stderr, Name ": device %s exists but is not an "
1087                                 "md array.\n", devlist->devname);
1088                         exit(1);
1089                 }
1090                 if ((int)ident.super_minor == -2) {
1091                         struct stat stb;
1092                         if (mdfd < 0) {
1093                                 fprintf(stderr, Name ": --super-minor=dev given, and "
1094                                         "listed device %s doesn't exist.\n",
1095                                         devlist->devname);
1096                                 exit(1);
1097                         }
1098                         fstat(mdfd, &stb);
1099                         ident.super_minor = minor(stb.st_rdev);
1100                 }
1101                 if (mdfd >= 0 && mode != MANAGE && mode != GROW) {
1102                         /* We don't really want this open yet, we just might
1103                          * have wanted to check some things
1104                          */
1105                         close(mdfd);
1106                         mdfd = -1;
1107                 }
1108         }
1109
1110         if (raiddisks) {
1111                 if (raiddisks > max_disks) {
1112                         fprintf(stderr, Name ": invalid number of raid devices: %d\n",
1113                                 raiddisks);
1114                         exit(2);
1115                 }
1116                 if (raiddisks == 1 &&  !force && level != -5) {
1117                         fprintf(stderr, Name ": '1' is an unusual number of drives for an array, so it is probably\n"
1118                                 "     a mistake.  If you really mean it you will need to specify --force before\n"
1119                                 "     setting the number of drives.\n");
1120                         exit(2);
1121                 }
1122         }
1123         if (sparedisks) {
1124                 if ( sparedisks > max_disks - raiddisks) {
1125                         fprintf(stderr, Name ": invalid number of spare-devices: %d\n",
1126                                 sparedisks);
1127                         exit(2);
1128                 }
1129         }
1130
1131         if (homehost == NULL)
1132                 homehost = conf_get_homehost(&require_homehost);
1133         if (homehost == NULL || strcmp(homehost, "<system>")==0) {
1134                 if (gethostname(sys_hostname, sizeof(sys_hostname)) == 0) {
1135                         sys_hostname[sizeof(sys_hostname)-1] = 0;
1136                         homehost = sys_hostname;
1137                 }
1138         }
1139
1140         if ((mode != MISC || devmode != 'E') &&
1141             geteuid() != 0) {
1142                 fprintf(stderr, Name ": must be super-user to perform this action\n");
1143                 exit(1);
1144         }
1145
1146         ident.autof = autof;
1147
1148         rv = 0;
1149         switch(mode) {
1150         case MANAGE:
1151                 /* readonly, add/remove, readwrite, runstop */
1152                 if (readonly>0)
1153                         rv = Manage_ro(devlist->devname, mdfd, readonly);
1154                 if (!rv && devs_found>1)
1155                         rv = Manage_subdevs(devlist->devname, mdfd,
1156                                             devlist->next, verbose-quiet, test);
1157                 if (!rv && readonly < 0)
1158                         rv = Manage_ro(devlist->devname, mdfd, readonly);
1159                 if (!rv && runstop)
1160                         rv = Manage_runstop(devlist->devname, mdfd, runstop, quiet);
1161                 break;
1162         case ASSEMBLE:
1163                 if (devs_found == 1 && ident.uuid_set == 0 &&
1164                     ident.super_minor == UnSet && ident.name[0] == 0 && !scan ) {
1165                         /* Only a device has been given, so get details from config file */
1166                         struct mddev_ident *array_ident = conf_get_ident(devlist->devname);
1167                         if (array_ident == NULL) {
1168                                 fprintf(stderr, Name ": %s not identified in config file.\n",
1169                                         devlist->devname);
1170                                 rv |= 1;
1171                                 if (mdfd >= 0)
1172                                         close(mdfd);
1173                         } else {
1174                                 if (array_ident->autof == 0)
1175                                         array_ident->autof = autof;
1176                                 rv |= Assemble(ss, devlist->devname, array_ident,
1177                                                NULL, backup_file,
1178                                                readonly, runstop, update,
1179                                                homehost, require_homehost,
1180                                                verbose-quiet, force);
1181                         }
1182                 } else if (!scan)
1183                         rv = Assemble(ss, devlist->devname, &ident,
1184                                       devlist->next, backup_file,
1185                                       readonly, runstop, update,
1186                                       homehost, require_homehost,
1187                                       verbose-quiet, force);
1188                 else if (devs_found>0) {
1189                         if (update && devs_found > 1) {
1190                                 fprintf(stderr, Name ": can only update a single array at a time\n");
1191                                 exit(1);
1192                         }
1193                         if (backup_file && devs_found > 1) {
1194                                 fprintf(stderr, Name ": can only assemble a single array when providing a backup file.\n");
1195                                 exit(1);
1196                         }
1197                         for (dv = devlist ; dv ; dv=dv->next) {
1198                                 struct mddev_ident *array_ident = conf_get_ident(dv->devname);
1199                                 if (array_ident == NULL) {
1200                                         fprintf(stderr, Name ": %s not identified in config file.\n",
1201                                                 dv->devname);
1202                                         rv |= 1;
1203                                         continue;
1204                                 }
1205                                 if (array_ident->autof == 0)
1206                                         array_ident->autof = autof;
1207                                 rv |= Assemble(ss, dv->devname, array_ident,
1208                                                NULL, backup_file,
1209                                                readonly, runstop, update,
1210                                                homehost, require_homehost,
1211                                                verbose-quiet, force);
1212                         }
1213                 } else {
1214                         struct mddev_ident *a, *array_list =  conf_get_ident(NULL);
1215                         struct mddev_dev *devlist = conf_get_devs();
1216                         int cnt = 0;
1217                         int failures, successes;
1218                         if (devlist == NULL) {
1219                                 fprintf(stderr, Name ": No devices listed in conf file were found.\n");
1220                                 exit(1);
1221                         }
1222                         if (update) {
1223                                 fprintf(stderr, Name ": --update not meaningful with a --scan assembly.\n");
1224                                 exit(1);
1225                         }
1226                         if (backup_file) {
1227                                 fprintf(stderr, Name ": --backup_file not meaningful with a --scan assembly.\n");
1228                                 exit(1);
1229                         }
1230                         for (a = array_list; a ; a = a->next) {
1231                                 a->assembled = 0;
1232                                 if (a->autof == 0)
1233                                         a->autof = autof;
1234                         }
1235                         do {
1236                                 failures = 0;
1237                                 successes = 0;
1238                                 rv = 0;
1239                                 for (a = array_list; a ; a = a->next) {
1240                                         int r;
1241                                         if (a->assembled)
1242                                                 continue;
1243                                         if (a->devname &&
1244                                             strcasecmp(a->devname, "<ignore>") == 0)
1245                                                 continue;
1246
1247                                         r = Assemble(ss, a->devname,
1248                                                      a,
1249                                                      NULL, NULL,
1250                                                      readonly, runstop, NULL,
1251                                                      homehost, require_homehost,
1252                                                      verbose-quiet, force);
1253                                         if (r == 0) {
1254                                                 a->assembled = 1;
1255                                                 successes++;
1256                                         } else
1257                                                 failures++;
1258                                         rv |= r;
1259                                         cnt++;
1260                                 }
1261                         } while (failures && successes);
1262                         if (homehost && cnt == 0) {
1263                                 /* Maybe we can auto-assemble something.
1264                                  * Repeatedly call Assemble in auto-assemble mode
1265                                  * until it fails
1266                                  */
1267                                 int rv2;
1268                                 int acnt;
1269                                 ident.autof = autof;
1270                                 do {
1271                                         struct mddev_dev *devlist = conf_get_devs();
1272                                         acnt = 0;
1273                                         do {
1274                                                 rv2 = Assemble(ss, NULL,
1275                                                                &ident,
1276                                                                devlist, NULL,
1277                                                                readonly, runstop, NULL,
1278                                                                homehost, require_homehost,
1279                                                                verbose-quiet, force);
1280                                                 if (rv2==0) {
1281                                                         cnt++;
1282                                                         acnt++;
1283                                                 }
1284                                                 if (rv2 == 1)
1285                                                         /* found something so even though assembly failed  we
1286                                                          * want to avoid auto-updates
1287                                                          */
1288                                                         auto_update_home = 0;
1289                                         } while (rv2!=2);
1290                                         /* Incase there are stacked devices, we need to go around again */
1291                                 } while (acnt);
1292 #if 0
1293                                 if (cnt == 0 && auto_update_home && homehost) {
1294                                         /* Nothing found, maybe we need to bootstrap homehost info */
1295                                         do {
1296                                                 acnt = 0;
1297                                                 do {
1298                                                         rv2 = Assemble(ss, NULL,
1299                                                                        &ident,
1300                                                                        NULL, NULL,
1301                                                                        readonly, runstop, "homehost",
1302                                                                        homehost, require_homehost,
1303                                                                        verbose-quiet, force);
1304                                                         if (rv2==0) {
1305                                                                 cnt++;
1306                                                                 acnt++;
1307                                                         }
1308                                                 } while (rv2!=2);
1309                                                 /* Incase there are stacked devices, we need to go around again */
1310                                         } while (acnt);
1311                                 }
1312 #endif
1313                                 if (cnt == 0 && rv == 0) {
1314                                         fprintf(stderr, Name ": No arrays found in config file or automatically\n");
1315                                         rv = 1;
1316                                 } else if (cnt)
1317                                         rv = 0;
1318                         } else if (cnt == 0 && rv == 0) {
1319                                 fprintf(stderr, Name ": No arrays found in config file\n");
1320                                 rv = 1;
1321                         }
1322                 }
1323                 break;
1324         case BUILD:
1325                 if (delay == 0) delay = DEFAULT_BITMAP_DELAY;
1326                 if (write_behind && !bitmap_file) {
1327                         fprintf(stderr, Name ": write-behind mode requires a bitmap.\n");
1328                         rv = 1;
1329                         break;
1330                 }
1331                 if (raiddisks == 0) {
1332                         fprintf(stderr, Name ": no raid-devices specified.\n");
1333                         rv = 1;
1334                         break;
1335                 }
1336
1337                 if (bitmap_file) {
1338                         if (strcmp(bitmap_file, "internal")==0) {
1339                                 fprintf(stderr, Name ": 'internal' bitmaps not supported with --build\n");
1340                                 rv |= 1;
1341                                 break;
1342                         }
1343                 }
1344                 rv = Build(devlist->devname, chunk, level, layout,
1345                            raiddisks, devlist->next, assume_clean,
1346                            bitmap_file, bitmap_chunk, write_behind,
1347                            delay, verbose-quiet, autof, size);
1348                 break;
1349         case CREATE:
1350                 if (delay == 0) delay = DEFAULT_BITMAP_DELAY;
1351                 if (write_behind && !bitmap_file) {
1352                         fprintf(stderr, Name ": write-behind mode requires a bitmap.\n");
1353                         rv = 1;
1354                         break;
1355                 }
1356                 if (raiddisks == 0) {
1357                         fprintf(stderr, Name ": no raid-devices specified.\n");
1358                         rv = 1;
1359                         break;
1360                 }
1361
1362                 rv = Create(ss, devlist->devname, chunk, level, layout, size<0 ? 0 : size,
1363                             raiddisks, sparedisks, ident.name, homehost,
1364                             ident.uuid_set ? ident.uuid : NULL,
1365                             devs_found-1, devlist->next, runstop, verbose-quiet, force, assume_clean,
1366                             bitmap_file, bitmap_chunk, write_behind, delay, autof);
1367                 break;
1368         case MISC:
1369                 if (devmode == 'E') {
1370                         if (devlist == NULL && !scan) {
1371                                 fprintf(stderr, Name ": No devices to examine\n");
1372                                 exit(2);
1373                         }
1374                         if (devlist == NULL)
1375                                 devlist = conf_get_devs();
1376                         if (devlist == NULL) {
1377                                 fprintf(stderr, Name ": No devices listed in %s\n", configfile?configfile:DefaultConfFile);
1378                                 exit(1);
1379                         }
1380                         if (brief && verbose)
1381                                 brief = 2;
1382                         rv = Examine(devlist, scan?(verbose>1?0:verbose+1):brief,
1383                                      export, scan,
1384                                      SparcAdjust, ss, homehost);
1385                 } else if (devmode == DetailPlatform) {
1386                         rv = Detail_Platform(ss ? ss->ss : NULL, ss ? scan : 1, verbose);
1387                 } else {
1388                         if (devlist == NULL) {
1389                                 if ((devmode=='D' || devmode == Waitclean) && scan) {
1390                                         /* apply --detail or --wait-clean to
1391                                          * all devices in /proc/mdstat
1392                                          */
1393                                         struct mdstat_ent *ms = mdstat_read(0, 1);
1394                                         struct mdstat_ent *e;
1395                                         struct map_ent *map = NULL;
1396                                         int members;
1397                                         int v = verbose>1?0:verbose+1;
1398
1399                                         for (members = 0; members <= 1; members++) {
1400                                         for (e=ms ; e ; e=e->next) {
1401                                                 char *name;
1402                                                 struct map_ent *me;
1403                                                 int member = e->metadata_version &&
1404                                                         strncmp(e->metadata_version,
1405                                                                 "external:/", 10) == 0;
1406                                                 if (members != member)
1407                                                         continue;
1408                                                 me = map_by_devnum(&map, e->devnum);
1409                                                 if (me && me->path
1410                                                     && strcmp(me->path, "/unknown") != 0)
1411                                                         name = me->path;
1412                                                 else
1413                                                         name = get_md_name(e->devnum);
1414
1415                                                 if (!name) {
1416                                                         fprintf(stderr, Name ": cannot find device file for %s\n",
1417                                                                 e->dev);
1418                                                         continue;
1419                                                 }
1420                                                 if (devmode == 'D')
1421                                                         rv |= Detail(name, v,
1422                                                                      export, test,
1423                                                                      homehost);
1424                                                 else
1425                                                         rv |= WaitClean(name, -1, v);
1426                                                 put_md_name(name);
1427                                         }
1428                                         }
1429                                         free_mdstat(ms);
1430                                 } else  if (devmode == 'S' && scan) {
1431                                         /* apply --stop to all devices in /proc/mdstat */
1432                                         /* Due to possible stacking of devices, repeat until
1433                                          * nothing more can be stopped
1434                                          */
1435                                         int progress=1, err;
1436                                         int last = 0;
1437                                         do {
1438                                                 struct mdstat_ent *ms = mdstat_read(0, 0);
1439                                                 struct mdstat_ent *e;
1440
1441                                                 if (!progress) last = 1;
1442                                                 progress = 0; err = 0;
1443                                                 for (e=ms ; e ; e=e->next) {
1444                                                         char *name = get_md_name(e->devnum);
1445
1446                                                         if (!name) {
1447                                                                 fprintf(stderr, Name ": cannot find device file for %s\n",
1448                                                                         e->dev);
1449                                                                 continue;
1450                                                         }
1451                                                         mdfd = open_mddev(name, 1);
1452                                                         if (mdfd >= 0) {
1453                                                                 if (Manage_runstop(name, mdfd, -1, quiet?1:last?0:-1))
1454                                                                         err = 1;
1455                                                                 else
1456                                                                         progress = 1;
1457                                                                 close(mdfd);
1458                                                         }
1459
1460                                                         put_md_name(name);
1461                                                 }
1462                                                 free_mdstat(ms);
1463                                         } while (!last && err);
1464                                         if (err) rv |= 1;
1465                                 } else {
1466                                         fprintf(stderr, Name ": No devices given.\n");
1467                                         exit(2);
1468                                 }
1469                         }
1470                         for (dv=devlist ; dv; dv=dv->next) {
1471                                 switch(dv->disposition) {
1472                                 case 'D':
1473                                         rv |= Detail(dv->devname,
1474                                                      brief?1+verbose:0,
1475                                                      export, test, homehost);
1476                                         continue;
1477                                 case 'K': /* Zero superblock */
1478                                         if (ss)
1479                                                 rv |= Kill(dv->devname, ss, force, quiet,0);
1480                                         else {
1481                                                 int q = quiet;
1482                                                 do {
1483                                                         rv |= Kill(dv->devname, NULL, force, q, 0);
1484                                                         q = 1;
1485                                                 } while (rv == 0);
1486                                                 rv &= ~2;
1487                                         }
1488                                         continue;
1489                                 case 'Q':
1490                                         rv |= Query(dv->devname); continue;
1491                                 case 'X':
1492                                         rv |= ExamineBitmap(dv->devname, brief, ss); continue;
1493                                 case 'W':
1494                                 case WaitOpt:
1495                                         rv |= Wait(dv->devname); continue;
1496                                 case Waitclean:
1497                                         rv |= WaitClean(dv->devname, -1, verbose-quiet); continue;
1498                                 case KillSubarray:
1499                                         rv |= Kill_subarray(dv->devname, subarray, quiet);
1500                                         continue;
1501                                 case UpdateSubarray:
1502                                         if (update == NULL) {
1503                                                 fprintf(stderr,
1504                                                         Name ": -U/--update must be specified with --update-subarray\n");
1505                                                 rv |= 1;
1506                                                 continue;
1507                                         }
1508                                         rv |= Update_subarray(dv->devname, subarray, update, &ident, quiet);
1509                                         continue;
1510                                 }
1511                                 mdfd = open_mddev(dv->devname, 1);
1512                                 if (mdfd>=0) {
1513                                         switch(dv->disposition) {
1514                                         case 'R':
1515                                                 rv |= Manage_runstop(dv->devname, mdfd, 1, quiet); break;
1516                                         case 'S':
1517                                                 rv |= Manage_runstop(dv->devname, mdfd, -1, quiet); break;
1518                                         case 'o':
1519                                                 rv |= Manage_ro(dv->devname, mdfd, 1); break;
1520                                         case 'w':
1521                                                 rv |= Manage_ro(dv->devname, mdfd, -1); break;
1522                                         }
1523                                         close(mdfd);
1524                                 } else
1525                                         rv |= 1;
1526                         }
1527                 }
1528                 break;
1529         case MONITOR:
1530                 if (!devlist && !scan) {
1531                         fprintf(stderr, Name ": Cannot monitor: need --scan or at least one device\n");
1532                         rv = 1;
1533                         break;
1534                 }
1535                 if (pidfile && !daemonise) {
1536                         fprintf(stderr, Name ": Cannot write a pid file when not in daemon mode\n");
1537                         rv = 1;
1538                         break;
1539                 }
1540                 if (delay == 0) {
1541                         if (get_linux_version() > 2006016)
1542                                 /* mdstat responds to poll */
1543                                 delay = 1000;
1544                         else
1545                                 delay = 60;
1546                 }
1547                 rv= Monitor(devlist, mailaddr, program,
1548                             delay?delay:60, daemonise, scan, oneshot,
1549                             dosyslog, test, pidfile, increments, spare_sharing);
1550                 break;
1551
1552         case GROW:
1553                 if (array_size >= 0) {
1554                         /* alway impose array size first, independent of
1555                          * anything else
1556                          * Do not allow level or raid_disks changes at the
1557                          * same time as that can be irreversibly destructive.
1558                          */
1559                         struct mdinfo sra;
1560                         int err;
1561                         if (raiddisks || level != UnSet) {
1562                                 fprintf(stderr, Name ": cannot change array size in same operation "
1563                                         "as changing raiddisks or level.\n"
1564                                         "    Change size first, then check that data is still intact.\n");
1565                                 rv = 1;
1566                                 break;
1567                         }
1568                         sysfs_init(&sra, mdfd, 0);
1569                         if (array_size == 0)
1570                                 err = sysfs_set_str(&sra, NULL, "array_size", "default");
1571                         else
1572                                 err = sysfs_set_num(&sra, NULL, "array_size", array_size / 2);
1573                         if (err < 0) {
1574                                 if (errno == E2BIG)
1575                                         fprintf(stderr, Name ": --array-size setting"
1576                                                 " is too large.\n");
1577                                 else
1578                                         fprintf(stderr, Name ": current kernel does"
1579                                                 " not support setting --array-size\n");
1580                                 rv = 1;
1581                                 break;
1582                         }
1583                 }
1584                 if (devs_found > 1) {
1585
1586                         /* must be '-a'. */
1587                         if (size >= 0 || raiddisks || chunk || layout_str != NULL || bitmap_file) {
1588                                 fprintf(stderr, Name ": --add cannot be used with other geometry changes in --grow mode\n");
1589                                 rv = 1;
1590                                 break;
1591                         }
1592                         for (dv=devlist->next; dv ; dv=dv->next) {
1593                                 rv = Grow_Add_device(devlist->devname, mdfd, dv->devname);
1594                                 if (rv)
1595                                         break;
1596                         }
1597                 } else if (bitmap_file) {
1598                         if (size >= 0 || raiddisks || chunk || layout_str != NULL) {
1599                                 fprintf(stderr, Name ": --bitmap changes cannot be used with other geometry changes in --grow mode\n");
1600                                 rv = 1;
1601                                 break;
1602                         }
1603                         if (delay == 0)
1604                                 delay = DEFAULT_BITMAP_DELAY;
1605                         rv = Grow_addbitmap(devlist->devname, mdfd, bitmap_file,
1606                                             bitmap_chunk, delay, write_behind, force);
1607                 } else if (size >= 0 || raiddisks != 0 || layout_str != NULL
1608                            || chunk != 0 || level != UnSet) {
1609                         rv = Grow_reshape(devlist->devname, mdfd, quiet, backup_file,
1610                                           size, level, layout_str, chunk, raiddisks);
1611                 } else if (array_size < 0)
1612                         fprintf(stderr, Name ": no changes to --grow\n");
1613                 break;
1614         case INCREMENTAL:
1615                 if (rebuild_map) {
1616                         RebuildMap();
1617                 }
1618                 if (scan) {
1619                         if (runstop <= 0) {
1620                                 fprintf(stderr, Name
1621                          ": --incremental --scan meaningless without --run.\n");
1622                                 break;
1623                         }
1624                         if (devmode == 'f') {
1625                                 fprintf(stderr, Name
1626                          ": --incremental --scan --fail not supported.\n");
1627                                 break;
1628                         }
1629                         rv = IncrementalScan(verbose);
1630                 }
1631                 if (!devlist) {
1632                         if (!rebuild_map && !scan) {
1633                                 fprintf(stderr, Name
1634                                         ": --incremental requires a device.\n");
1635                                 rv = 1;
1636                         }
1637                         break;
1638                 }
1639                 if (devlist->next) {
1640                         fprintf(stderr, Name
1641                                ": --incremental can only handle one device.\n");
1642                         rv = 1;
1643                         break;
1644                 }
1645                 if (devmode == 'f')
1646                         rv = IncrementalRemove(devlist->devname, remove_path,
1647                                                verbose-quiet);
1648                 else
1649                         rv = Incremental(devlist->devname, verbose-quiet,
1650                                          runstop, ss, homehost,
1651                                          require_homehost, autof);
1652                 break;
1653         case AUTODETECT:
1654                 autodetect();
1655                 break;
1656         }
1657         exit(rv);
1658 }