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