mdadm.c

   1 /*
   2  * mdadm - manage Linux "md" devices aka RAID arrays.
   3  *
   4  * Copyright (C) 2001-2012 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 static int scan_assemble(int autof, struct supertype *ss,
  34                          int readonly, int runstop,
  35                          struct mddev_ident *ident,
  36                          char *homehost, int require_homehost,
  37                          int verbose, int force,
  38                          int freeze_reshape);
  39 static int misc_scan(char devmode, int verbose, int export, int test,
  40                      char *homehost, char *prefer);
  41 static int stop_scan(int quiet);
  42 static int misc_list(struct mddev_dev *devlist,
  43                      int brief, int verbose, int export, int test,
  44                      char *homehost, char *prefer, char *subarray,
  45                      char *update, struct mddev_ident *ident,
  46                      struct supertype *ss, int force, int quiet);
  47
  48
  49 int main(int argc, char *argv[])
  50 {
  51         int mode = 0;
  52         int opt;
  53         int option_index;
  54         int rv;
  55         int i;
  56
  57         int chunk = 0;
  58         long long size = -1;
  59         long long array_size = -1;
  60         int level = UnSet;
  61         int layout = UnSet;
  62         char *layout_str = NULL;
  63         int raiddisks = 0;
  64         int sparedisks = 0;
  65         struct mddev_ident ident;
  66         char *configfile = NULL;
  67         char *update = NULL;
  68         int scan = 0;
  69         int devmode = 0;
  70         int runstop = 0;
  71         int readonly = 0;
  72         int write_behind = 0;
  73         int bitmap_fd = -1;
  74         char *bitmap_file = NULL;
  75         char *backup_file = NULL;
  76         int invalid_backup = 0;
  77         int bitmap_chunk = UnSet;
  78         int SparcAdjust = 0;
  79         struct mddev_dev *devlist = NULL;
  80         struct mddev_dev **devlistend = & devlist;
  81         struct mddev_dev *dv;
  82         int devs_found = 0;
  83         int verbose = 0;
  84         int quiet = 0;
  85         int brief = 0;
  86         int force = 0;
  87         int test = 0;
  88         int export = 0;
  89         int assume_clean = 0;
  90         char *prefer = NULL;
  91         char *symlinks = NULL;
  92         int grow_continue = 0;
  93         /* autof indicates whether and how to create device node.
  94          * bottom 3 bits are style.  Rest (when shifted) are number of parts
  95          * 0  - unset
  96          * 1  - don't create (no)
  97          * 2  - if is_standard, then create (yes)
  98          * 3  - create as 'md' - reject is_standard mdp (md)
  99          * 4  - create as 'mdp' - reject is_standard md (mdp)
 100          * 5  - default to md if not is_standard (md in config file)
 101          * 6  - default to mdp if not is_standard (part, or mdp in config file)
 102          */
 103         int autof = 0;
 104
 105         char *homehost = NULL;
 106         char sys_hostname[256];
 107         int require_homehost = 1;
 108         char *mailaddr = NULL;
 109         char *program = NULL;
 110         int increments = 20;
 111         int delay = 0;
 112         int daemonise = 0;
 113         char *pidfile = NULL;
 114         int oneshot = 0;
 115         int spare_sharing = 1;
 116         struct supertype *ss = NULL;
 117         int writemostly = 0;
 118         char *shortopt = short_options;
 119         int dosyslog = 0;
 120         int rebuild_map = 0;
 121         char *subarray = NULL;
 122         char *remove_path = NULL;
 123         char *udev_filename = NULL;
 124
 125         int print_help = 0;
 126         FILE *outf;
 127
 128         int mdfd = -1;
 129
 130         int freeze_reshape = 0;
 131
 132         srandom(time(0) ^ getpid());
 133
 134         ident.uuid_set=0;
 135         ident.level = UnSet;
 136         ident.raid_disks = UnSet;
 137         ident.super_minor= UnSet;
 138         ident.devices=0;
 139         ident.spare_group = NULL;
 140         ident.autof = 0;
 141         ident.st = NULL;
 142         ident.bitmap_fd = -1;
 143         ident.bitmap_file = NULL;
 144         ident.name[0] = 0;
 145         ident.container = NULL;
 146         ident.member = NULL;
 147
 148         while ((option_index = -1) ,
 149                (opt=getopt_long(argc, argv,
 150                                 shortopt, long_options,
 151                                 &option_index)) != -1) {
 152                 int newmode = mode;
 153                 /* firstly, some mode-independent options */
 154                 switch(opt) {
 155                 case HelpOptions:
 156                         print_help = 2;
 157                         continue;
 158                 case 'h':
 159                         print_help = 1;
 160                         continue;
 161
 162                 case 'V':
 163                         fputs(Version, stderr);
 164                         exit(0);
 165
 166                 case 'v': verbose++;
 167                         continue;
 168
 169                 case 'q': quiet++;
 170                         continue;
 171
 172                 case 'b':
 173                         if (mode == ASSEMBLE || mode == BUILD || mode == CREATE
 174                             || mode == GROW || mode == INCREMENTAL
 175                             || mode == MANAGE)
 176                                 break; /* b means bitmap */
 177                 case Brief:
 178                         brief = 1;
 179                         continue;
 180
 181                 case 'Y': export++;
 182                         continue;
 183
 184                 case HomeHost:
 185                         if (strcasecmp(optarg, "<ignore>") == 0)
 186                                 require_homehost = 0;
 187                         else
 188                                 homehost = optarg;
 189                         continue;
 190
 191                 /*
 192                  * --offroot sets first char of argv[0] to @. This is used
 193                  * by systemd to signal that the task was launched from
 194                  * initrd/initramfs and should be preserved during shutdown
 195                  */
 196                 case OffRootOpt:
 197                         argv[0][0] = '@';
 198                         __offroot = 1;
 199                         continue;
 200
 201                 case Prefer:
 202                         if (prefer)
 203                                 free(prefer);
 204                         if (asprintf(&prefer, "/%s/", optarg) <= 0)
 205                                 prefer = NULL;
 206                         continue;
 207
 208                 case ':':
 209                 case '?':
 210                         fputs(Usage, stderr);
 211                         exit(2);
 212                 }
 213                 /* second, figure out the mode.
 214                  * Some options force the mode.  Others
 215                  * set the mode if it isn't already
 216                  */
 217
 218                 switch(opt) {
 219                 case ManageOpt:
 220                         newmode = MANAGE;
 221                         shortopt = short_bitmap_options;
 222                         break;
 223                 case 'a':
 224                 case Add:
 225                 case 'r':
 226                 case Remove:
 227                 case 'f':
 228                 case Fail:
 229                 case ReAdd: /* re-add */
 230                         if (!mode) {
 231                                 newmode = MANAGE;
 232                                 shortopt = short_bitmap_options;
 233                         }
 234                         break;
 235
 236                 case 'A': newmode = ASSEMBLE;
 237                         shortopt = short_bitmap_auto_options;
 238                         break;
 239                 case 'B': newmode = BUILD;
 240                         shortopt = short_bitmap_auto_options;
 241                         break;
 242                 case 'C': newmode = CREATE;
 243                         shortopt = short_bitmap_auto_options;
 244                         break;
 245                 case 'F': newmode = MONITOR;
 246                         break;
 247                 case 'G': newmode = GROW;
 248                         shortopt = short_bitmap_options;
 249                         break;
 250                 case 'I': newmode = INCREMENTAL;
 251                         shortopt = short_bitmap_auto_options;
 252                         break;
 253                 case AutoDetect:
 254                         newmode = AUTODETECT;
 255                         break;
 256
 257                 case MiscOpt:
 258                 case 'D':
 259                 case 'E':
 260                 case 'X':
 261                 case 'Q':
 262                         newmode = MISC;
 263                         break;
 264
 265                 case 'R':
 266                 case 'S':
 267                 case 'o':
 268                 case 'w':
 269                 case 'W':
 270                 case WaitOpt:
 271                 case Waitclean:
 272                 case DetailPlatform:
 273                 case KillSubarray:
 274                 case UpdateSubarray:
 275                 case UdevRules:
 276                 case KillOpt:
 277                         if (!mode)
 278                                 newmode = MISC;
 279                         break;
 280
 281                 case NoSharing:
 282                         newmode = MONITOR;
 283                         break;
 284                 }
 285                 if (mode && newmode == mode) {
 286                         /* everybody happy ! */
 287                 } else if (mode && newmode != mode) {
 288                         /* not allowed.. */
 289                         pr_err("");
 290                         if (option_index >= 0)
 291                                 fprintf(stderr, "--%s", long_options[option_index].name);
 292                         else
 293                                 fprintf(stderr, "-%c", opt);
 294                         fprintf(stderr, " would set mdadm mode to \"%s\", but it is already set to \"%s\".\n",
 295                                 map_num(modes, newmode),
 296                                 map_num(modes, mode));
 297                         exit(2);
 298                 } else if (!mode && newmode) {
 299                         mode = newmode;
 300                         if (mode == MISC && devs_found) {
 301                                 pr_err("No action given for %s in --misc mode\n",
 302                                         devlist->devname);
 303                                 fprintf(stderr,"       Action options must come before device names\n");
 304                                 exit(2);
 305                         }
 306                 } else {
 307                         /* special case of -c --help */
 308                         if ((opt == 'c' || opt == ConfigFile) &&
 309                             ( strncmp(optarg, "--h", 3)==0 ||
 310                               strncmp(optarg, "-h", 2)==0)) {
 311                                 fputs(Help_config, stdout);
 312                                 exit(0);
 313                         }
 314
 315                         /* If first option is a device, don't force the mode yet */
 316                         if (opt == 1) {
 317                                 if (devs_found == 0) {
 318                                         dv = xmalloc(sizeof(*dv));
 319                                         dv->devname = optarg;
 320                                         dv->disposition = devmode;
 321                                         dv->writemostly = writemostly;
 322                                         dv->used = 0;
 323                                         dv->next = NULL;
 324                                         *devlistend = dv;
 325                                         devlistend = &dv->next;
 326
 327                                         devs_found++;
 328                                         continue;
 329                                 }
 330                                 /* No mode yet, and this is the second device ... */
 331                                 pr_err("An option must be given to set the mode before a second device\n"
 332                                         "       (%s) is listed\n", optarg);
 333                                 exit(2);
 334                         }
 335                         if (option_index >= 0)
 336                                 pr_err("--%s", long_options[option_index].name);
 337                         else
 338                                 pr_err("-%c", opt);
 339                         fprintf(stderr, " does not set the mode, and so cannot be the first option.\n");
 340                         exit(2);
 341                 }
 342
 343                 /* if we just set the mode, then done */
 344                 switch(opt) {
 345                 case ManageOpt:
 346                 case MiscOpt:
 347                 case 'A':
 348                 case 'B':
 349                 case 'C':
 350                 case 'F':
 351                 case 'G':
 352                 case 'I':
 353                 case AutoDetect:
 354                         continue;
 355                 }
 356                 if (opt == 1) {
 357                         /* an undecorated option - must be a device name.
 358                          */
 359                         if (devs_found > 0 && mode == MANAGE && !devmode) {
 360                                 pr_err("Must give one of -a/-r/-f"
 361                                         " for subsequent devices at %s\n", optarg);
 362                                 exit(2);
 363                         }
 364                         if (devs_found > 0 && mode == GROW && !devmode) {
 365                                 pr_err("Must give -a/--add for"
 366                                        " devices to add: %s\n", optarg);
 367                                 exit(2);
 368                         }
 369                         dv = xmalloc(sizeof(*dv));
 370                         dv->devname = optarg;
 371                         dv->disposition = devmode;
 372                         dv->writemostly = writemostly;
 373                         dv->used = 0;
 374                         dv->next = NULL;
 375                         *devlistend = dv;
 376                         devlistend = &dv->next;
 377
 378                         devs_found++;
 379                         continue;
 380                 }
 381
 382                 /* We've got a mode, and opt is now something else which
 383                  * could depend on the mode */
 384 #define O(a,b) ((a<<16)|b)
 385                 switch (O(mode,opt)) {
 386                 case O(GROW,'c'):
 387                 case O(GROW,ChunkSize):
 388                 case O(CREATE,'c'):
 389                 case O(CREATE,ChunkSize):
 390                 case O(BUILD,'c'): /* chunk or rounding */
 391                 case O(BUILD,ChunkSize): /* chunk or rounding */
 392                         if (chunk) {
 393                                 pr_err("chunk/rounding may only be specified once. "
 394                                         "Second value is %s.\n", optarg);
 395                                 exit(2);
 396                         }
 397                         chunk = parse_size(optarg);
 398                         if (chunk < 8 || (chunk&1)) {
 399                                 pr_err("invalid chunk/rounding value: %s\n",
 400                                         optarg);
 401                                 exit(2);
 402                         }
 403                         /* Convert sectors to K */
 404                         chunk /= 2;
 405                         continue;
 406
 407                 case O(INCREMENTAL, 'e'):
 408                 case O(CREATE,'e'):
 409                 case O(ASSEMBLE,'e'):
 410                 case O(MISC,'e'): /* set metadata (superblock) information */
 411                         if (ss) {
 412                                 pr_err("metadata information already given\n");
 413                                 exit(2);
 414                         }
 415                         for(i=0; !ss && superlist[i]; i++)
 416                                 ss = superlist[i]->match_metadata_desc(optarg);
 417
 418                         if (!ss) {
 419                                 pr_err("unrecognised metadata identifier: %s\n", optarg);
 420                                 exit(2);
 421                         }
 422                         continue;
 423
 424                 case O(MANAGE,'W'):
 425                 case O(MANAGE,WriteMostly):
 426                 case O(BUILD,'W'):
 427                 case O(BUILD,WriteMostly):
 428                 case O(CREATE,'W'):
 429                 case O(CREATE,WriteMostly):
 430                         /* set write-mostly for following devices */
 431                         writemostly = 1;
 432                         continue;
 433
 434                 case O(MANAGE,'w'):
 435                         /* clear write-mostly for following devices */
 436                         writemostly = 2;
 437                         continue;
 438
 439
 440                 case O(GROW,'z'):
 441                 case O(CREATE,'z'):
 442                 case O(BUILD,'z'): /* size */
 443                         if (size >= 0) {
 444                                 pr_err("size may only be specified once. "
 445                                         "Second value is %s.\n", optarg);
 446                                 exit(2);
 447                         }
 448                         if (strcmp(optarg, "max")==0)
 449                                 size = 0;
 450                         else {
 451                                 size = parse_size(optarg);
 452                                 if (size < 8) {
 453                                         pr_err("invalid size: %s\n",
 454                                                 optarg);
 455                                         exit(2);
 456                                 }
 457                                 /* convert sectors to K */
 458                                 size /= 2;
 459                         }
 460                         continue;
 461
 462                 case O(GROW,'Z'): /* array size */
 463                         if (array_size >= 0) {
 464                                 pr_err("array-size may only be specified once. "
 465                                         "Second value is %s.\n", optarg);
 466                                 exit(2);
 467                         }
 468                         if (strcmp(optarg, "max") == 0)
 469                                 array_size = 0;
 470                         else {
 471                                 array_size = parse_size(optarg);
 472                                 if (array_size <= 0) {
 473                                         pr_err("invalid array size: %s\n",
 474                                                 optarg);
 475                                         exit(2);
 476                                 }
 477                         }
 478                         continue;
 479
 480                 case O(GROW,'l'):
 481                 case O(CREATE,'l'):
 482                 case O(BUILD,'l'): /* set raid level*/
 483                         if (level != UnSet) {
 484                                 pr_err("raid level may only be set once.  "
 485                                         "Second value is %s.\n", optarg);
 486                                 exit(2);
 487                         }
 488                         level = map_name(pers, optarg);
 489                         if (level == UnSet) {
 490                                 pr_err("invalid raid level: %s\n",
 491                                         optarg);
 492                                 exit(2);
 493                         }
 494                         if (level != 0 && level != LEVEL_LINEAR && level != 1 &&
 495                             level != LEVEL_MULTIPATH && level != LEVEL_FAULTY &&
 496                             level != 10 &&
 497                             mode == BUILD) {
 498                                 pr_err("Raid level %s not permitted with --build.\n",
 499                                         optarg);
 500                                 exit(2);
 501                         }
 502                         if (sparedisks > 0 && level < 1 && level >= -1) {
 503                                 pr_err("raid level %s is incompatible with spare-devices setting.\n",
 504                                         optarg);
 505                                 exit(2);
 506                         }
 507                         ident.level = level;
 508                         continue;
 509
 510                 case O(GROW, 'p'): /* new layout */
 511                 case O(GROW, Layout):
 512                         if (layout_str) {
 513                                 pr_err("layout may only be sent once.  "
 514                                        "Second value was %s\n", optarg);
 515                                 exit(2);
 516                         }
 517                         layout_str = optarg;
 518                         /* 'Grow' will parse the value */
 519                         continue;
 520
 521                 case O(CREATE,'p'): /* raid5 layout */
 522                 case O(CREATE,Layout):
 523                 case O(BUILD,'p'): /* faulty layout */
 524                 case O(BUILD,Layout):
 525                         if (layout != UnSet) {
 526                                 pr_err("layout may only be sent once.  "
 527                                        "Second value was %s\n", optarg);
 528                                 exit(2);
 529                         }
 530                         switch(level) {
 531                         default:
 532                                 pr_err("layout not meaningful for %s arrays.\n",
 533                                         map_num(pers, level));
 534                                 exit(2);
 535                         case UnSet:
 536                                 pr_err("raid level must be given before layout.\n");
 537                                 exit(2);
 538
 539                         case 5:
 540                                 layout = map_name(r5layout, optarg);
 541                                 if (layout==UnSet) {
 542                                         pr_err("layout %s not understood for raid5.\n",
 543                                                 optarg);
 544                                         exit(2);
 545                                 }
 546                                 break;
 547                         case 6:
 548                                 layout = map_name(r6layout, optarg);
 549                                 if (layout==UnSet) {
 550                                         pr_err("layout %s not understood for raid6.\n",
 551                                                 optarg);
 552                                         exit(2);
 553                                 }
 554                                 break;
 555
 556                         case 10:
 557                                 layout = parse_layout_10(optarg);
 558                                 if (layout < 0) {
 559                                         pr_err("layout for raid10 must be 'nNN', 'oNN' or 'fNN' where NN is a number, not %s\n", optarg);
 560                                         exit(2);
 561                                 }
 562                                 break;
 563                         case LEVEL_FAULTY:
 564                                 /* Faulty
 565                                  * modeNNN
 566                                  */
 567                                 layout = parse_layout_faulty(optarg);
 568                                 if (layout == -1) {
 569                                         pr_err("layout %s not understood for faulty.\n",
 570                                                 optarg);
 571                                         exit(2);
 572                                 }
 573                                 break;
 574                         }
 575                         continue;
 576
 577                 case O(CREATE,AssumeClean):
 578                 case O(BUILD,AssumeClean): /* assume clean */
 579                 case O(GROW,AssumeClean):
 580                         assume_clean = 1;
 581                         continue;
 582
 583                 case O(GROW,'n'):
 584                 case O(CREATE,'n'):
 585                 case O(BUILD,'n'): /* number of raid disks */
 586                         if (raiddisks) {
 587                                 pr_err("raid-devices set twice: %d and %s\n",
 588                                         raiddisks, optarg);
 589                                 exit(2);
 590                         }
 591                         raiddisks = parse_num(optarg);
 592                         if (raiddisks <= 0) {
 593                                 pr_err("invalid number of raid devices: %s\n",
 594                                         optarg);
 595                                 exit(2);
 596                         }
 597                         ident.raid_disks = raiddisks;
 598                         continue;
 599
 600                 case O(CREATE,'x'): /* number of spare (eXtra) disks */
 601                         if (sparedisks) {
 602                                 pr_err("spare-devices set twice: %d and %s\n",
 603                                        sparedisks, optarg);
 604                                 exit(2);
 605                         }
 606                         if (level != UnSet && level <= 0 && level >= -1) {
 607                                 pr_err("spare-devices setting is incompatible with raid level %d\n",
 608                                         level);
 609                                 exit(2);
 610                         }
 611                         sparedisks = parse_num(optarg);
 612                         if (sparedisks < 0) {
 613                                 pr_err("invalid number of spare-devices: %s\n",
 614                                         optarg);
 615                                 exit(2);
 616                         }
 617                         continue;
 618
 619                 case O(CREATE,'a'):
 620                 case O(CREATE,Auto):
 621                 case O(BUILD,'a'):
 622                 case O(BUILD,Auto):
 623                 case O(INCREMENTAL,'a'):
 624                 case O(INCREMENTAL,Auto):
 625                 case O(ASSEMBLE,'a'):
 626                 case O(ASSEMBLE,Auto): /* auto-creation of device node */
 627                         autof = parse_auto(optarg, "--auto flag", 0);
 628                         continue;
 629
 630                 case O(CREATE,Symlinks):
 631                 case O(BUILD,Symlinks):
 632                 case O(ASSEMBLE,Symlinks): /* auto creation of symlinks in /dev to /dev/md */
 633                         symlinks = optarg;
 634                         continue;
 635
 636                 case O(BUILD,'f'): /* force honouring '-n 1' */
 637                 case O(BUILD,Force): /* force honouring '-n 1' */
 638                 case O(GROW,'f'): /* ditto */
 639                 case O(GROW,Force): /* ditto */
 640                 case O(CREATE,'f'): /* force honouring of device list */
 641                 case O(CREATE,Force): /* force honouring of device list */
 642                 case O(ASSEMBLE,'f'): /* force assembly */
 643                 case O(ASSEMBLE,Force): /* force assembly */
 644                 case O(MISC,'f'): /* force zero */
 645                 case O(MISC,Force): /* force zero */
 646                 case O(MANAGE,Force): /* add device which is too large */
 647                         force=1;
 648                         continue;
 649                         /* now for the Assemble options */
 650                 case O(ASSEMBLE, FreezeReshape):   /* Freeze reshape during
 651                                                     * initrd phase */
 652                 case O(INCREMENTAL, FreezeReshape):
 653                         freeze_reshape = 1;
 654                         continue;
 655                 case O(CREATE,'u'): /* uuid of array */
 656                 case O(ASSEMBLE,'u'): /* uuid of array */
 657                         if (ident.uuid_set) {
 658                                 pr_err("uuid cannot be set twice.  "
 659                                         "Second value %s.\n", optarg);
 660                                 exit(2);
 661                         }
 662                         if (parse_uuid(optarg, ident.uuid))
 663                                 ident.uuid_set = 1;
 664                         else {
 665                                 pr_err("Bad uuid: %s\n", optarg);
 666                                 exit(2);
 667                         }
 668                         continue;
 669
 670                 case O(CREATE,'N'):
 671                 case O(ASSEMBLE,'N'):
 672                 case O(MISC,'N'):
 673                         if (ident.name[0]) {
 674                                 pr_err("name cannot be set twice.   "
 675                                         "Second value %s.\n", optarg);
 676                                 exit(2);
 677                         }
 678                         if (mode == MISC && !subarray) {
 679                                 pr_err("-N/--name only valid with --update-subarray in misc mode\n");
 680                                 exit(2);
 681                         }
 682                         if (strlen(optarg) > 32) {
 683                                 pr_err("name '%s' is too long, 32 chars max.\n",
 684                                         optarg);
 685                                 exit(2);
 686                         }
 687                         strcpy(ident.name, optarg);
 688                         continue;
 689
 690                 case O(ASSEMBLE,'m'): /* super-minor for array */
 691                 case O(ASSEMBLE,SuperMinor):
 692                         if (ident.super_minor != UnSet) {
 693                                 pr_err("super-minor cannot be set twice.  "
 694                                         "Second value: %s.\n", optarg);
 695                                 exit(2);
 696                         }
 697                         if (strcmp(optarg, "dev")==0)
 698                                 ident.super_minor = -2;
 699                         else {
 700                                 ident.super_minor = parse_num(optarg);
 701                                 if (ident.super_minor < 0) {
 702                                         pr_err("Bad super-minor number: %s.\n", optarg);
 703                                         exit(2);
 704                                 }
 705                         }
 706                         continue;
 707
 708                 case O(ASSEMBLE,'o'):
 709                 case O(MANAGE,'o'):
 710                 case O(CREATE,'o'):
 711                         readonly = 1;
 712                         continue;
 713
 714                 case O(ASSEMBLE,'U'): /* update the superblock */
 715                 case O(MISC,'U'):
 716                         if (update) {
 717                                 pr_err("Can only update one aspect"
 718                                         " of superblock, both %s and %s given.\n",
 719                                         update, optarg);
 720                                 exit(2);
 721                         }
 722                         if (mode == MISC && !subarray) {
 723                                 pr_err("Only subarrays can be"
 724                                         " updated in misc mode\n");
 725                                 exit(2);
 726                         }
 727                         update = optarg;
 728                         if (strcmp(update, "sparc2.2")==0)
 729                                 continue;
 730                         if (strcmp(update, "super-minor") == 0)
 731                                 continue;
 732                         if (strcmp(update, "summaries")==0)
 733                                 continue;
 734                         if (strcmp(update, "resync")==0)
 735                                 continue;
 736                         if (strcmp(update, "uuid")==0)
 737                                 continue;
 738                         if (strcmp(update, "name")==0)
 739                                 continue;
 740                         if (strcmp(update, "homehost")==0)
 741                                 continue;
 742                         if (strcmp(update, "devicesize")==0)
 743                                 continue;
 744                         if (strcmp(update, "no-bitmap")==0)
 745                                 continue;
 746                         if (strcmp(update, "byteorder")==0) {
 747                                 if (ss) {
 748                                         pr_err("must not set metadata"
 749                                                " type with --update=byteorder.\n");
 750                                         exit(2);
 751                                 }
 752                                 for(i=0; !ss && superlist[i]; i++)
 753                                         ss = superlist[i]->match_metadata_desc(
 754                                                 "0.swap");
 755                                 if (!ss) {
 756                                         pr_err("INTERNAL ERROR"
 757                                                 " cannot find 0.swap\n");
 758                                         exit(2);
 759                                 }
 760
 761                                 continue;
 762                         }
 763                         if (strcmp(update,"?") == 0 ||
 764                             strcmp(update, "help") == 0) {
 765                                 outf = stdout;
 766                                 fprintf(outf, Name ": ");
 767                         } else {
 768                                 outf = stderr;
 769                                 fprintf(outf,
 770                                         Name ": '--update=%s' is invalid.  ",
 771                                         update);
 772                         }
 773                         fprintf(outf, "Valid --update options are:\n"
 774                 "     'sparc2.2', 'super-minor', 'uuid', 'name', 'resync',\n"
 775                 "     'summaries', 'homehost', 'byteorder', 'devicesize',\n"
 776                 "     'no-bitmap'\n");
 777                         exit(outf == stdout ? 0 : 2);
 778
 779                 case O(MANAGE,'U'):
 780                         /* update=devicesize is allowed with --re-add */
 781                         if (devmode != 'A') {
 782                                 pr_err("--update in Manage mode only"
 783                                         " allowed with --re-add.\n");
 784                                 exit(1);
 785                         }
 786                         if (update) {
 787                                 pr_err("Can only update one aspect"
 788                                         " of superblock, both %s and %s given.\n",
 789                                         update, optarg);
 790                                 exit(2);
 791                         }
 792                         update = optarg;
 793                         if (strcmp(update, "devicesize") != 0) {
 794                                 pr_err("only 'devicesize' can be"
 795                                         " updated with --re-add\n");
 796                                 exit(2);
 797                         }
 798                         continue;
 799
 800                 case O(INCREMENTAL,NoDegraded):
 801                         pr_err("--no-degraded is deprecated in Incremental mode\n");
 802                 case O(ASSEMBLE,NoDegraded): /* --no-degraded */
 803                         runstop = -1; /* --stop isn't allowed for --assemble,
 804                                        * so we overload slightly */
 805                         continue;
 806
 807                 case O(ASSEMBLE,'c'):
 808                 case O(ASSEMBLE,ConfigFile):
 809                 case O(INCREMENTAL, 'c'):
 810                 case O(INCREMENTAL, ConfigFile):
 811                 case O(MISC, 'c'):
 812                 case O(MISC, ConfigFile):
 813                 case O(MONITOR,'c'):
 814                 case O(MONITOR,ConfigFile):
 815                         if (configfile) {
 816                                 pr_err("configfile cannot be set twice.  "
 817                                         "Second value is %s.\n", optarg);
 818                                 exit(2);
 819                         }
 820                         configfile = optarg;
 821                         set_conffile(configfile);
 822                         /* FIXME possibly check that config file exists.  Even parse it */
 823                         continue;
 824                 case O(ASSEMBLE,'s'): /* scan */
 825                 case O(MISC,'s'):
 826                 case O(MONITOR,'s'):
 827                 case O(INCREMENTAL,'s'):
 828                         scan = 1;
 829                         continue;
 830
 831                 case O(MONITOR,'m'): /* mail address */
 832                 case O(MONITOR,EMail):
 833                         if (mailaddr)
 834                                 pr_err("only specify one mailaddress. %s ignored.\n",
 835                                         optarg);
 836                         else
 837                                 mailaddr = optarg;
 838                         continue;
 839
 840                 case O(MONITOR,'p'): /* alert program */
 841                 case O(MONITOR,ProgramOpt): /* alert program */
 842                         if (program)
 843                                 pr_err("only specify one alter program. %s ignored.\n",
 844                                         optarg);
 845                         else
 846                                 program = optarg;
 847                         continue;
 848
 849                 case O(MONITOR,'r'): /* rebuild increments */
 850                 case O(MONITOR,Increment):
 851                         increments = atoi(optarg);
 852                         if (increments > 99 || increments < 1) {
 853                                 pr_err("please specify positive integer between 1 and 99 as rebuild increments.\n");
 854                                 exit(2);
 855                         }
 856                         continue;
 857
 858                 case O(MONITOR,'d'): /* delay in seconds */
 859                 case O(GROW, 'd'):
 860                 case O(BUILD,'d'): /* delay for bitmap updates */
 861                 case O(CREATE,'d'):
 862                         if (delay)
 863                                 pr_err("only specify delay once. %s ignored.\n",
 864                                         optarg);
 865                         else {
 866                                 delay = parse_num(optarg);
 867                                 if (delay<1) {
 868                                         pr_err("invalid delay: %s\n",
 869                                                 optarg);
 870                                         exit(2);
 871                                 }
 872                         }
 873                         continue;
 874                 case O(MONITOR,'f'): /* daemonise */
 875                 case O(MONITOR,Fork):
 876                         daemonise = 1;
 877                         continue;
 878                 case O(MONITOR,'i'): /* pid */
 879                         if (pidfile)
 880                                 pr_err("only specify one pid file. %s ignored.\n",
 881                                         optarg);
 882                         else
 883                                 pidfile = optarg;
 884                         continue;
 885                 case O(MONITOR,'1'): /* oneshot */
 886                         oneshot = 1;
 887                         spare_sharing = 0;
 888                         continue;
 889                 case O(MONITOR,'t'): /* test */
 890                         test = 1;
 891                         continue;
 892                 case O(MONITOR,'y'): /* log messages to syslog */
 893                         openlog("mdadm", LOG_PID, SYSLOG_FACILITY);
 894                         dosyslog = 1;
 895                         continue;
 896                 case O(MONITOR, NoSharing):
 897                         spare_sharing = 0;
 898                         continue;
 899
 900                         /* now the general management options.  Some are applicable
 901                          * to other modes. None have arguments.
 902                          */
 903                 case O(GROW,'a'):
 904                 case O(GROW,Add):
 905                 case O(MANAGE,'a'):
 906                 case O(MANAGE,Add): /* add a drive */
 907                         devmode = 'a';
 908                         continue;
 909                 case O(MANAGE,ReAdd):
 910                         devmode = 'A';
 911                         continue;
 912                 case O(MANAGE,'r'): /* remove a drive */
 913                 case O(MANAGE,Remove):
 914                         devmode = 'r';
 915                         continue;
 916                 case O(MANAGE,'f'): /* set faulty */
 917                 case O(MANAGE,Fail):
 918                 case O(INCREMENTAL,'f'):
 919                 case O(INCREMENTAL,Remove):
 920                 case O(INCREMENTAL,Fail): /* r for incremental is taken, use f
 921                                            * even though we will both fail and
 922                                            * remove the device */
 923                         devmode = 'f';
 924                         continue;
 925                 case O(INCREMENTAL,'R'):
 926                 case O(MANAGE,'R'):
 927                 case O(ASSEMBLE,'R'):
 928                 case O(BUILD,'R'):
 929                 case O(CREATE,'R'): /* Run the array */
 930                         if (runstop < 0) {
 931                                 pr_err("Cannot both Stop and Run an array\n");
 932                                 exit(2);
 933                         }
 934                         runstop = 1;
 935                         continue;
 936                 case O(MANAGE,'S'):
 937                         if (runstop > 0) {
 938                                 pr_err("Cannot both Run and Stop an array\n");
 939                                 exit(2);
 940                         }
 941                         runstop = -1;
 942                         continue;
 943                 case O(MANAGE,'t'):
 944                         test = 1;
 945                         continue;
 946
 947                 case O(MISC,'Q'):
 948                 case O(MISC,'D'):
 949                 case O(MISC,'E'):
 950                 case O(MISC,KillOpt):
 951                 case O(MISC,'R'):
 952                 case O(MISC,'S'):
 953                 case O(MISC,'X'):
 954                 case O(MISC,'o'):
 955                 case O(MISC,'w'):
 956                 case O(MISC,'W'):
 957                 case O(MISC, WaitOpt):
 958                 case O(MISC, Waitclean):
 959                 case O(MISC, DetailPlatform):
 960                 case O(MISC, KillSubarray):
 961                 case O(MISC, UpdateSubarray):
 962                         if (opt == KillSubarray || opt == UpdateSubarray) {
 963                                 if (subarray) {
 964                                         pr_err("subarray can only"
 965                                                 " be specified once\n");
 966                                         exit(2);
 967                                 }
 968                                 subarray = optarg;
 969                         }
 970                         if (devmode && devmode != opt &&
 971                             (devmode == 'E' || (opt == 'E' && devmode != 'Q'))) {
 972                                 pr_err("--examine/-E cannot be given with ");
 973                                 if (devmode == 'E') {
 974                                         if (option_index >= 0)
 975                                                 fprintf(stderr, "--%s\n",
 976                                                         long_options[option_index].name);
 977                                         else
 978                                                 fprintf(stderr, "-%c\n", opt);
 979                                 } else if (isalpha(devmode))
 980                                         fprintf(stderr, "-%c\n", devmode);
 981                                 else
 982                                         fprintf(stderr, "previous option\n");
 983                                 exit(2);
 984                         }
 985                         devmode = opt;
 986                         continue;
 987                 case O(MISC, UdevRules):
 988                         if (devmode && devmode != opt) {
 989                                 pr_err("--udev-rules must"
 990                                        " be the only option.\n");
 991                         } else {
 992                                 if (udev_filename)
 993                                         pr_err("only specify one udev "
 994                                                 "rule filename. %s ignored.\n",
 995                                                 optarg);
 996                                 else
 997                                         udev_filename = optarg;
 998                         }
 999                         devmode = opt;
1000                         continue;
1001                 case O(MISC,'t'):
1002                         test = 1;
1003                         continue;
1004
1005                 case O(MISC, Sparc22):
1006                         if (devmode != 'E') {
1007                                 pr_err("--sparc2.2 only allowed with --examine\n");
1008                                 exit(2);
1009                         }
1010                         SparcAdjust = 1;
1011                         continue;
1012
1013                 case O(ASSEMBLE,'b'): /* here we simply set the bitmap file */
1014                 case O(ASSEMBLE,Bitmap):
1015                         if (!optarg) {
1016                                 pr_err("bitmap file needed with -b in --assemble mode\n");
1017                                 exit(2);
1018                         }
1019                         if (strcmp(optarg, "internal")==0) {
1020                                 pr_err("there is no need to specify --bitmap when assembling arrays with internal bitmaps\n");
1021                                 continue;
1022                         }
1023                         bitmap_fd = open(optarg, O_RDWR);
1024                         if (!*optarg || bitmap_fd < 0) {
1025                                 pr_err("cannot open bitmap file %s: %s\n", optarg, strerror(errno));
1026                                 exit(2);
1027                         }
1028                         ident.bitmap_fd = bitmap_fd; /* for Assemble */
1029                         continue;
1030
1031                 case O(ASSEMBLE, BackupFile):
1032                 case O(GROW, BackupFile):
1033                         /* Specify a file into which grow might place a backup,
1034                          * or from which assemble might recover a backup
1035                          */
1036                         if (backup_file) {
1037                                 pr_err("backup file already specified, rejecting %s\n", optarg);
1038                                 exit(2);
1039                         }
1040                         backup_file = optarg;
1041                         continue;
1042
1043                 case O(GROW, Continue):
1044                         /* Continue interrupted grow
1045                          */
1046                         grow_continue = 1;
1047                         continue;
1048                 case O(ASSEMBLE, InvalidBackup):
1049                         /* Acknowledge that the backupfile is invalid, but ask
1050                          * to continue anyway
1051                          */
1052                         invalid_backup = 1;
1053                         continue;
1054
1055                 case O(BUILD,'b'):
1056                 case O(BUILD,Bitmap):
1057                 case O(CREATE,'b'):
1058                 case O(CREATE,Bitmap): /* here we create the bitmap */
1059                         if (strcmp(optarg, "none") == 0) {
1060                                 pr_err("'--bitmap none' only"
1061                                         " supported for --grow\n");
1062                                 exit(2);
1063                         }
1064                         /* FALL THROUGH */
1065                 case O(GROW,'b'):
1066                 case O(GROW,Bitmap):
1067                         if (strcmp(optarg, "internal")== 0 ||
1068                             strcmp(optarg, "none")== 0 ||
1069                             strchr(optarg, '/') != NULL) {
1070                                 bitmap_file = optarg;
1071                                 continue;
1072                         }
1073                         /* probable typo */
1074                         pr_err("bitmap file must contain a '/', or be 'internal', or 'none'\n"
1075                                 "       not '%s'\n", optarg);
1076                         exit(2);
1077
1078                 case O(GROW,BitmapChunk):
1079                 case O(BUILD,BitmapChunk):
1080                 case O(CREATE,BitmapChunk): /* bitmap chunksize */
1081                         bitmap_chunk = parse_size(optarg);
1082                         if (bitmap_chunk <= 0 ||
1083                             bitmap_chunk & (bitmap_chunk - 1)) {
1084                                 pr_err("invalid bitmap chunksize: %s\n",
1085                                        optarg);
1086                                 exit(2);
1087                         }
1088                         bitmap_chunk = bitmap_chunk * 512;
1089                         continue;
1090
1091                 case O(GROW, WriteBehind):
1092                 case O(BUILD, WriteBehind):
1093                 case O(CREATE, WriteBehind): /* write-behind mode */
1094                         write_behind = DEFAULT_MAX_WRITE_BEHIND;
1095                         if (optarg) {
1096                                 write_behind = parse_num(optarg);
1097                                 if (write_behind < 0 ||
1098                                     write_behind > 16383) {
1099                                         pr_err("Invalid value for maximum outstanding write-behind writes: %s.\n\tMust be between 0 and 16383.\n", optarg);
1100                                         exit(2);
1101                                 }
1102                         }
1103                         continue;
1104
1105                 case O(INCREMENTAL, 'r'):
1106                 case O(INCREMENTAL, RebuildMapOpt):
1107                         rebuild_map = 1;
1108                         continue;
1109                 case O(INCREMENTAL, IncrementalPath):
1110                         remove_path = optarg;
1111                         continue;
1112                 }
1113                 /* We have now processed all the valid options. Anything else is
1114                  * an error
1115                  */
1116                 if (option_index > 0)
1117                         pr_err(":option --%s not valid in %s mode\n",
1118                                 long_options[option_index].name,
1119                                 map_num(modes, mode));
1120                 else
1121                         pr_err("option -%c not valid in %s mode\n",
1122                                 opt, map_num(modes, mode));
1123                 exit(2);
1124
1125         }
1126
1127         if (print_help) {
1128                 char *help_text;
1129                 if (print_help == 2)
1130                         help_text = OptionHelp;
1131                 else
1132                         help_text = mode_help[mode];
1133                 if (help_text == NULL)
1134                         help_text = Help;
1135                 fputs(help_text,stdout);
1136                 exit(0);
1137         }
1138
1139         if (!mode && devs_found) {
1140                 mode = MISC;
1141                 devmode = 'Q';
1142                 if (devlist->disposition == 0)
1143                         devlist->disposition = devmode;
1144         }
1145         if (!mode) {
1146                 fputs(Usage, stderr);
1147                 exit(2);
1148         }
1149
1150         if (symlinks) {
1151                 struct createinfo *ci = conf_get_create_info();
1152
1153                 if (strcasecmp(symlinks, "yes") == 0)
1154                         ci->symlinks = 1;
1155                 else if (strcasecmp(symlinks, "no") == 0)
1156                         ci->symlinks = 0;
1157                 else {
1158                         pr_err("option --symlinks must be 'no' or 'yes'\n");
1159                         exit(2);
1160                 }
1161         }
1162         /* Ok, got the option parsing out of the way
1163          * hopefully it's mostly right but there might be some stuff
1164          * missing
1165          *
1166          * That is mosty checked in the per-mode stuff but...
1167          *
1168          * For @,B,C and A without -s, the first device listed must be
1169          * an md device.  We check that here and open it.
1170          */
1171
1172         if (mode == MANAGE || mode == BUILD || mode == CREATE
1173             || mode == GROW
1174             || (mode == ASSEMBLE && ! scan)) {
1175                 if (devs_found < 1) {
1176                         pr_err("an md device must be given in this mode\n");
1177                         exit(2);
1178                 }
1179                 if ((int)ident.super_minor == -2 && autof) {
1180                         pr_err("--super-minor=dev is incompatible with --auto\n");
1181                         exit(2);
1182                 }
1183                 if (mode == MANAGE || mode == GROW) {
1184                         mdfd = open_mddev(devlist->devname, 1);
1185                         if (mdfd < 0)
1186                                 exit(1);
1187                 } else
1188                         /* non-existent device is OK */
1189                         mdfd = open_mddev(devlist->devname, 0);
1190                 if (mdfd == -2) {
1191                         pr_err("device %s exists but is not an "
1192                                 "md array.\n", devlist->devname);
1193                         exit(1);
1194                 }
1195                 if ((int)ident.super_minor == -2) {
1196                         struct stat stb;
1197                         if (mdfd < 0) {
1198                                 pr_err("--super-minor=dev given, and "
1199                                         "listed device %s doesn't exist.\n",
1200                                         devlist->devname);
1201                                 exit(1);
1202                         }
1203                         fstat(mdfd, &stb);
1204                         ident.super_minor = minor(stb.st_rdev);
1205                 }
1206                 if (mdfd >= 0 && mode != MANAGE && mode != GROW) {
1207                         /* We don't really want this open yet, we just might
1208                          * have wanted to check some things
1209                          */
1210                         close(mdfd);
1211                         mdfd = -1;
1212                 }
1213         }
1214
1215         if (raiddisks) {
1216                 if (raiddisks == 1 &&  !force && level != LEVEL_FAULTY) {
1217                         pr_err("'1' is an unusual number of drives for an array, so it is probably\n"
1218                                 "     a mistake.  If you really mean it you will need to specify --force before\n"
1219                                 "     setting the number of drives.\n");
1220                         exit(2);
1221                 }
1222         }
1223
1224         if (homehost == NULL)
1225                 homehost = conf_get_homehost(&require_homehost);
1226         if (homehost == NULL || strcasecmp(homehost, "<system>")==0) {
1227                 if (gethostname(sys_hostname, sizeof(sys_hostname)) == 0) {
1228                         sys_hostname[sizeof(sys_hostname)-1] = 0;
1229                         homehost = sys_hostname;
1230                 }
1231         }
1232         if (homehost && (!homehost[0] || strcasecmp(homehost, "<none>") == 0)) {
1233                 homehost = NULL;
1234                 require_homehost = 0;
1235         }
1236
1237         if ((mode == MISC && devmode == 'E')
1238             || (mode == MONITOR && spare_sharing == 0))
1239                 /* Anyone may try this */;
1240         else if (geteuid() != 0) {
1241                 pr_err("must be super-user to perform this action\n");
1242                 exit(1);
1243         }
1244
1245         ident.autof = autof;
1246
1247         rv = 0;
1248         switch(mode) {
1249         case MANAGE:
1250                 /* readonly, add/remove, readwrite, runstop */
1251                 if (readonly>0)
1252                         rv = Manage_ro(devlist->devname, mdfd, readonly);
1253                 if (!rv && devs_found>1)
1254                         rv = Manage_subdevs(devlist->devname, mdfd,
1255                                             devlist->next, verbose-quiet, test,
1256                                             update, force);
1257                 if (!rv && readonly < 0)
1258                         rv = Manage_ro(devlist->devname, mdfd, readonly);
1259                 if (!rv && runstop)
1260                         rv = Manage_runstop(devlist->devname, mdfd, runstop, quiet);
1261                 break;
1262         case ASSEMBLE:
1263                 if (devs_found == 1 && ident.uuid_set == 0 &&
1264                     ident.super_minor == UnSet && ident.name[0] == 0 && !scan ) {
1265                         /* Only a device has been given, so get details from config file */
1266                         struct mddev_ident *array_ident = conf_get_ident(devlist->devname);
1267                         if (array_ident == NULL) {
1268                                 pr_err("%s not identified in config file.\n",
1269                                         devlist->devname);
1270                                 rv |= 1;
1271                                 if (mdfd >= 0)
1272                                         close(mdfd);
1273                         } else {
1274                                 if (array_ident->autof == 0)
1275                                         array_ident->autof = autof;
1276                                 rv |= Assemble(ss, devlist->devname, array_ident,
1277                                                NULL, backup_file, invalid_backup,
1278                                                readonly, runstop, update,
1279                                                homehost, require_homehost,
1280                                                verbose-quiet, force,
1281                                                freeze_reshape);
1282                         }
1283                 } else if (!scan)
1284                         rv = Assemble(ss, devlist->devname, &ident,
1285                                       devlist->next, backup_file, invalid_backup,
1286                                       readonly, runstop, update,
1287                                       homehost, require_homehost,
1288                                       verbose-quiet, force,
1289                                       freeze_reshape);
1290                 else if (devs_found > 0) {
1291                         if (update && devs_found > 1) {
1292                                 pr_err("can only update a single array at a time\n");
1293                                 exit(1);
1294                         }
1295                         if (backup_file && devs_found > 1) {
1296                                 pr_err("can only assemble a single array when providing a backup file.\n");
1297                                 exit(1);
1298                         }
1299                         for (dv = devlist ; dv ; dv=dv->next) {
1300                                 struct mddev_ident *array_ident = conf_get_ident(dv->devname);
1301                                 if (array_ident == NULL) {
1302                                         pr_err("%s not identified in config file.\n",
1303                                                 dv->devname);
1304                                         rv |= 1;
1305                                         continue;
1306                                 }
1307                                 if (array_ident->autof == 0)
1308                                         array_ident->autof = autof;
1309                                 rv |= Assemble(ss, dv->devname, array_ident,
1310                                                NULL, backup_file, invalid_backup,
1311                                                readonly, runstop, update,
1312                                                homehost, require_homehost,
1313                                                verbose-quiet, force,
1314                                                freeze_reshape);
1315                         }
1316                 } else {
1317                         if (update) {
1318                                 pr_err("--update not meaningful with a --scan assembly.\n");
1319                                 exit(1);
1320                         }
1321                         if (backup_file) {
1322                                 pr_err("--backup_file not meaningful with a --scan assembly.\n");
1323                                 exit(1);
1324                         }
1325                         rv = scan_assemble(autof, ss, readonly, runstop,
1326                                            &ident, homehost,
1327                                            require_homehost,
1328                                            verbose - quiet,
1329                                            force, freeze_reshape);
1330                 }
1331
1332                 break;
1333         case BUILD:
1334                 if (delay == 0) delay = DEFAULT_BITMAP_DELAY;
1335                 if (write_behind && !bitmap_file) {
1336                         pr_err("write-behind mode requires a bitmap.\n");
1337                         rv = 1;
1338                         break;
1339                 }
1340                 if (raiddisks == 0) {
1341                         pr_err("no raid-devices specified.\n");
1342                         rv = 1;
1343                         break;
1344                 }
1345
1346                 if (bitmap_file) {
1347                         if (strcmp(bitmap_file, "internal")==0) {
1348                                 pr_err("'internal' bitmaps not supported with --build\n");
1349                                 rv |= 1;
1350                                 break;
1351                         }
1352                 }
1353                 rv = Build(devlist->devname, chunk, level, layout,
1354                            raiddisks, devlist->next, assume_clean,
1355                            bitmap_file, bitmap_chunk, write_behind,
1356                            delay, verbose-quiet, autof, size);
1357                 break;
1358         case CREATE:
1359                 if (delay == 0) delay = DEFAULT_BITMAP_DELAY;
1360                 if (write_behind && !bitmap_file) {
1361                         pr_err("write-behind mode requires a bitmap.\n");
1362                         rv = 1;
1363                         break;
1364                 }
1365                 if (raiddisks == 0) {
1366                         pr_err("no raid-devices specified.\n");
1367                         rv = 1;
1368                         break;
1369                 }
1370
1371                 rv = Create(ss, devlist->devname, chunk, level, layout, size<0 ? 0 : size,
1372                             raiddisks, sparedisks, ident.name, homehost,
1373                             ident.uuid_set ? ident.uuid : NULL,
1374                             devs_found-1, devlist->next, runstop,
1375                             readonly, verbose-quiet, force, assume_clean,
1376                             bitmap_file, bitmap_chunk, write_behind, delay, autof);
1377                 break;
1378         case MISC:
1379                 if (devmode == 'E') {
1380                         if (devlist == NULL && !scan) {
1381                                 pr_err("No devices to examine\n");
1382                                 exit(2);
1383                         }
1384                         if (devlist == NULL)
1385                                 devlist = conf_get_devs();
1386                         if (devlist == NULL) {
1387                                 pr_err("No devices listed in %s\n", configfile?configfile:DefaultConfFile);
1388                                 exit(1);
1389                         }
1390                         if (brief && verbose)
1391                                 brief = 2;
1392                         rv = Examine(devlist, scan?(verbose>1?0:verbose+1):brief,
1393                                      export, scan,
1394                                      SparcAdjust, ss, homehost);
1395                 } else if (devmode == DetailPlatform) {
1396                         rv = Detail_Platform(ss ? ss->ss : NULL, ss ? scan : 1, verbose);
1397                 } else if (devlist == NULL) {
1398                         if (devmode == 'S' && scan)
1399                                 rv = stop_scan(quiet);
1400                         else if ((devmode == 'D' || devmode == Waitclean) && scan)
1401                                 rv = misc_scan(devmode, verbose, export,
1402                                                test, homehost, prefer);
1403                         else if (devmode == UdevRules)
1404                                 rv = Write_rules(udev_filename);
1405                         else {
1406                                 pr_err("No devices given.\n");
1407                                 exit(2);
1408                         }
1409                 } else
1410                         rv = misc_list(devlist, brief, verbose, export, test,
1411                                        homehost, prefer, subarray, update,
1412                                        &ident,
1413                                        ss, force, quiet);
1414                 break;
1415         case MONITOR:
1416                 if (!devlist && !scan) {
1417                         pr_err("Cannot monitor: need --scan or at least one device\n");
1418                         rv = 1;
1419                         break;
1420                 }
1421                 if (pidfile && !daemonise) {
1422                         pr_err("Cannot write a pid file when not in daemon mode\n");
1423                         rv = 1;
1424                         break;
1425                 }
1426                 if (delay == 0) {
1427                         if (get_linux_version() > 2006016)
1428                                 /* mdstat responds to poll */
1429                                 delay = 1000;
1430                         else
1431                                 delay = 60;
1432                 }
1433                 rv= Monitor(devlist, mailaddr, program,
1434                             delay?delay:60, daemonise, scan, oneshot,
1435                             dosyslog, test, pidfile, increments,
1436                             spare_sharing, prefer);
1437                 break;
1438
1439         case GROW:
1440                 if (array_size >= 0) {
1441                         /* alway impose array size first, independent of
1442                          * anything else
1443                          * Do not allow level or raid_disks changes at the
1444                          * same time as that can be irreversibly destructive.
1445                          */
1446                         struct mdinfo sra;
1447                         int err;
1448                         if (raiddisks || level != UnSet) {
1449                                 pr_err("cannot change array size in same operation "
1450                                         "as changing raiddisks or level.\n"
1451                                         "    Change size first, then check that data is still intact.\n");
1452                                 rv = 1;
1453                                 break;
1454                         }
1455                         sysfs_init(&sra, mdfd, 0);
1456                         if (array_size == 0)
1457                                 err = sysfs_set_str(&sra, NULL, "array_size", "default");
1458                         else
1459                                 err = sysfs_set_num(&sra, NULL, "array_size", array_size / 2);
1460                         if (err < 0) {
1461                                 if (errno == E2BIG)
1462                                         pr_err("--array-size setting"
1463                                                 " is too large.\n");
1464                                 else
1465                                         pr_err("current kernel does"
1466                                                 " not support setting --array-size\n");
1467                                 rv = 1;
1468                                 break;
1469                         }
1470                 }
1471                 if (devs_found > 1 && raiddisks == 0) {
1472                         /* must be '-a'. */
1473                         if (size >= 0 || chunk || layout_str != NULL || bitmap_file) {
1474                                 pr_err("--add cannot be used with "
1475                                         "other geometry changes in --grow mode\n");
1476                                 rv = 1;
1477                                 break;
1478                         }
1479                         for (dv=devlist->next; dv ; dv=dv->next) {
1480                                 rv = Grow_Add_device(devlist->devname, mdfd,
1481                                                      dv->devname);
1482                                 if (rv)
1483                                         break;
1484                         }
1485                 } else if (bitmap_file) {
1486                         if (size >= 0 || raiddisks || chunk ||
1487                             layout_str != NULL || devs_found > 1) {
1488                                 pr_err("--bitmap changes cannot be "
1489                                         "used with other geometry changes "
1490                                         "in --grow mode\n");
1491                                 rv = 1;
1492                                 break;
1493                         }
1494                         if (delay == 0)
1495                                 delay = DEFAULT_BITMAP_DELAY;
1496                         rv = Grow_addbitmap(devlist->devname, mdfd, bitmap_file,
1497                                             bitmap_chunk, delay, write_behind, force);
1498                 } else if (grow_continue)
1499                         rv = Grow_continue_command(devlist->devname,
1500                                                    mdfd, backup_file,
1501                                                    verbose);
1502                 else if (size >= 0 || raiddisks != 0 || layout_str != NULL
1503                          || chunk != 0 || level != UnSet) {
1504                         rv = Grow_reshape(devlist->devname, mdfd, quiet, backup_file,
1505                                           size, level, layout_str, chunk, raiddisks,
1506                                           devlist->next,
1507                                           assume_clean, force);
1508                 } else if (array_size < 0)
1509                         pr_err("no changes to --grow\n");
1510                 break;
1511         case INCREMENTAL:
1512                 if (rebuild_map) {
1513                         RebuildMap();
1514                 }
1515                 if (scan) {
1516                         if (runstop <= 0) {
1517                                 pr_err("--incremental --scan meaningless without --run.\n");
1518                                 break;
1519                         }
1520                         if (devmode == 'f') {
1521                                 pr_err("--incremental --scan --fail not supported.\n");
1522                                 break;
1523                         }
1524                         rv = IncrementalScan(verbose);
1525                 }
1526                 if (!devlist) {
1527                         if (!rebuild_map && !scan) {
1528                                 pr_err("--incremental requires a device.\n");
1529                                 rv = 1;
1530                         }
1531                         break;
1532                 }
1533                 if (devlist->next) {
1534                         pr_err("--incremental can only handle one device.\n");
1535                         rv = 1;
1536                         break;
1537                 }
1538                 if (devmode == 'f')
1539                         rv = IncrementalRemove(devlist->devname, remove_path,
1540                                                verbose-quiet);
1541                 else
1542                         rv = Incremental(devlist->devname, verbose-quiet,
1543                                          runstop, ss, homehost,
1544                                          require_homehost, autof,
1545                                          freeze_reshape);
1546                 break;
1547         case AUTODETECT:
1548                 autodetect();
1549                 break;
1550         }
1551         exit(rv);
1552 }
1553
1554 static int scan_assemble(int autof, struct supertype *ss,
1555                          int readonly, int runstop,
1556                          struct mddev_ident *ident,
1557                          char *homehost, int require_homehost,
1558                          int verbose, int force,
1559                          int freeze_reshape)
1560 {
1561         struct mddev_ident *a, *array_list =  conf_get_ident(NULL);
1562         struct mddev_dev *devlist = conf_get_devs();
1563         struct map_ent *map = NULL;
1564         int cnt = 0;
1565         int rv = 0;
1566         int failures, successes;
1567
1568         if (conf_verify_devnames(array_list)) {
1569                 pr_err("Duplicate MD device names in "
1570                        "conf file were found.\n");
1571                 return 1;
1572         }
1573         if (devlist == NULL) {
1574                 pr_err("No devices listed in conf file were found.\n");
1575                 return 1;
1576         }
1577         for (a = array_list; a ; a = a->next) {
1578                 a->assembled = 0;
1579                 if (a->autof == 0)
1580                         a->autof = autof;
1581         }
1582         if (map_lock(&map))
1583                 pr_err("%s: failed to get "
1584                        "exclusive lock on mapfile\n",
1585                        __func__);
1586         do {
1587                 failures = 0;
1588                 successes = 0;
1589                 rv = 0;
1590                 for (a = array_list; a ; a = a->next) {
1591                         int r;
1592                         if (a->assembled)
1593                                 continue;
1594                         if (a->devname &&
1595                             strcasecmp(a->devname, "<ignore>") == 0)
1596                                 continue;
1597
1598                         r = Assemble(ss, a->devname,
1599                                      a,
1600                                      NULL, NULL, 0,
1601                                      readonly, runstop, NULL,
1602                                      homehost, require_homehost,
1603                                      verbose, force,
1604                                      freeze_reshape);
1605                         if (r == 0) {
1606                                 a->assembled = 1;
1607                                 successes++;
1608                         } else
1609                                 failures++;
1610                         rv |= r;
1611                         cnt++;
1612                 }
1613         } while (failures && successes);
1614         if (homehost && cnt == 0) {
1615                 /* Maybe we can auto-assemble something.
1616                  * Repeatedly call Assemble in auto-assemble mode
1617                  * until it fails
1618                  */
1619                 int rv2;
1620                 int acnt;
1621                 ident->autof = autof;
1622                 do {
1623                         struct mddev_dev *devlist = conf_get_devs();
1624                         acnt = 0;
1625                         do {
1626                                 rv2 = Assemble(ss, NULL,
1627                                                ident,
1628                                                devlist, NULL, 0,
1629                                                readonly,
1630                                                runstop, NULL,
1631                                                homehost,
1632                                                require_homehost,
1633                                                verbose,
1634                                                force,
1635                                                freeze_reshape);
1636                                 if (rv2==0) {
1637                                         cnt++;
1638                                         acnt++;
1639                                 }
1640                         } while (rv2!=2);
1641                         /* Incase there are stacked devices, we need to go around again */
1642                 } while (acnt);
1643                 if (cnt == 0 && rv == 0) {
1644                         pr_err("No arrays found in config file or automatically\n");
1645                         rv = 1;
1646                 } else if (cnt)
1647                         rv = 0;
1648         } else if (cnt == 0 && rv == 0) {
1649                 pr_err("No arrays found in config file\n");
1650                 rv = 1;
1651         }
1652         map_unlock(&map);
1653         return rv;
1654 }
1655
1656 static int misc_scan(char devmode, int verbose, int export, int test,
1657                      char *homehost, char *prefer)
1658 {
1659         /* apply --detail or --wait-clean to
1660          * all devices in /proc/mdstat
1661          */
1662         struct mdstat_ent *ms = mdstat_read(0, 1);
1663         struct mdstat_ent *e;
1664         struct map_ent *map = NULL;
1665         int members;
1666         int v = verbose>1?0:verbose+1;
1667         int rv = 0;
1668
1669         for (members = 0; members <= 1; members++) {
1670                 for (e=ms ; e ; e=e->next) {
1671                         char *name;
1672                         struct map_ent *me;
1673                         int member = e->metadata_version &&
1674                                 strncmp(e->metadata_version,
1675                                         "external:/", 10) == 0;
1676                         if (members != member)
1677                                 continue;
1678                         me = map_by_devnum(&map, e->devnum);
1679                         if (me && me->path
1680                             && strcmp(me->path, "/unknown") != 0)
1681                                 name = me->path;
1682                         else
1683                                 name = get_md_name(e->devnum);
1684
1685                         if (!name) {
1686                                 pr_err("cannot find device file for %s\n",
1687                                         e->dev);
1688                                 continue;
1689                         }
1690                         if (devmode == 'D')
1691                                 rv |= Detail(name, v,
1692                                              export, test,
1693                                              homehost, prefer);
1694                         else
1695                                 rv |= WaitClean(name, -1, v);
1696                         put_md_name(name);
1697                 }
1698         }
1699         free_mdstat(ms);
1700         return rv;
1701 }
1702
1703 static int stop_scan(int quiet)
1704 {
1705         /* apply --stop to all devices in /proc/mdstat */
1706         /* Due to possible stacking of devices, repeat until
1707          * nothing more can be stopped
1708          */
1709         int progress=1, err;
1710         int last = 0;
1711         int rv = 0;
1712         do {
1713                 struct mdstat_ent *ms = mdstat_read(0, 0);
1714                 struct mdstat_ent *e;
1715
1716                 if (!progress) last = 1;
1717                 progress = 0; err = 0;
1718                 for (e=ms ; e ; e=e->next) {
1719                         char *name = get_md_name(e->devnum);
1720                         int mdfd;
1721
1722                         if (!name) {
1723                                 pr_err("cannot find device file for %s\n",
1724                                         e->dev);
1725                                 continue;
1726                         }
1727                         mdfd = open_mddev(name, 1);
1728                         if (mdfd >= 0) {
1729                                 if (Manage_runstop(name, mdfd, -1, quiet?1:last?0:-1))
1730                                         err = 1;
1731                                 else
1732                                         progress = 1;
1733                                 close(mdfd);
1734                         }
1735
1736                         put_md_name(name);
1737                 }
1738                 free_mdstat(ms);
1739         } while (!last && err);
1740         if (err)
1741                 rv |= 1;
1742         return rv;
1743 }
1744
1745 static int misc_list(struct mddev_dev *devlist,
1746                      int brief, int verbose, int export, int test,
1747                      char *homehost, char *prefer, char *subarray,
1748                      char *update, struct mddev_ident *ident,
1749                      struct supertype *ss, int force, int quiet)
1750 {
1751         struct mddev_dev *dv;
1752         int rv = 0;
1753
1754         for (dv=devlist ; dv; dv=dv->next) {
1755                 int mdfd;
1756
1757                 switch(dv->disposition) {
1758                 case 'D':
1759                         rv |= Detail(dv->devname,
1760                                      brief?1+verbose:0,
1761                                      export, test, homehost, prefer);
1762                         continue;
1763                 case KillOpt: /* Zero superblock */
1764                         if (ss)
1765                                 rv |= Kill(dv->devname, ss, force, quiet,0);
1766                         else {
1767                                 int q = quiet;
1768                                 do {
1769                                         rv |= Kill(dv->devname, NULL, force, q, 0);
1770                                         q = 1;
1771                                 } while (rv == 0);
1772                                 rv &= ~2;
1773                         }
1774                         continue;
1775                 case 'Q':
1776                         rv |= Query(dv->devname); continue;
1777                 case 'X':
1778                         rv |= ExamineBitmap(dv->devname, brief, ss); continue;
1779                 case 'W':
1780                 case WaitOpt:
1781                         rv |= Wait(dv->devname); continue;
1782                 case Waitclean:
1783                         rv |= WaitClean(dv->devname, -1, verbose-quiet); continue;
1784                 case KillSubarray:
1785                         rv |= Kill_subarray(dv->devname, subarray, quiet);
1786                         continue;
1787                 case UpdateSubarray:
1788                         if (update == NULL) {
1789                                 pr_err("-U/--update must be specified with --update-subarray\n");
1790                                 rv |= 1;
1791                                 continue;
1792                         }
1793                         rv |= Update_subarray(dv->devname, subarray,
1794                                               update, ident, quiet);
1795                         continue;
1796                 }
1797                 mdfd = open_mddev(dv->devname, 1);
1798                 if (mdfd>=0) {
1799                         switch(dv->disposition) {
1800                         case 'R':
1801                                 rv |= Manage_runstop(dv->devname, mdfd, 1, quiet); break;
1802                         case 'S':
1803                                 rv |= Manage_runstop(dv->devname, mdfd, -1, quiet); break;
1804                         case 'o':
1805                                 rv |= Manage_ro(dv->devname, mdfd, 1); break;
1806                         case 'w':
1807                                 rv |= Manage_ro(dv->devname, mdfd, -1); break;
1808                         }
1809                         close(mdfd);
1810                 } else
1811                         rv |= 1;
1812         }
1813         return rv;
1814 }