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