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