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