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                         if (mode == CREATE &&
 469                             strcmp(optarg, "variable") == 0)
 470                                 data_offset = VARIABLE_OFFSET;
 471                         else
 472                                 data_offset = parse_size(optarg);
 473                         if (data_offset == INVALID_SECTORS) {
 474                                 fprintf(stderr, Name ": invalid data-offset: %s\n",
 475                                         optarg);
 476                                 exit(2);
 477                         }
 478                         continue;
 479
 480                 case O(GROW,'l'):
 481                 case O(CREATE,'l'):
 482                 case O(BUILD,'l'): /* set raid level*/
 483                         if (s.level != UnSet) {
 484                                 pr_err("raid level may only be set once.  "
 485                                         "Second value is %s.\n", optarg);
 486                                 exit(2);
 487                         }
 488                         s.level = map_name(pers, optarg);
 489                         if (s.level == UnSet) {
 490                                 pr_err("invalid raid level: %s\n",
 491                                         optarg);
 492                                 exit(2);
 493                         }
 494                         if (s.level != 0 && s.level != LEVEL_LINEAR && s.level != 1 &&
 495                             s.level != LEVEL_MULTIPATH && s.level != LEVEL_FAULTY &&
 496                             s.level != 10 &&
 497                             mode == BUILD) {
 498                                 pr_err("Raid level %s not permitted with --build.\n",
 499                                         optarg);
 500                                 exit(2);
 501                         }
 502                         if (s.sparedisks > 0 && s.level < 1 && s.level >= -1) {
 503                                 pr_err("raid level %s is incompatible with spare-devices setting.\n",
 504                                         optarg);
 505                                 exit(2);
 506                         }
 507                         ident.level = s.level;
 508                         continue;
 509
 510                 case O(GROW, 'p'): /* new layout */
 511                 case O(GROW, Layout):
 512                         if (s.layout_str) {
 513                                 pr_err("layout may only be sent once.  "
 514                                        "Second value was %s\n", optarg);
 515                                 exit(2);
 516                         }
 517                         s.layout_str = optarg;
 518                         /* 'Grow' will parse the value */
 519                         continue;
 520
 521                 case O(CREATE,'p'): /* raid5 layout */
 522                 case O(CREATE,Layout):
 523                 case O(BUILD,'p'): /* faulty layout */
 524                 case O(BUILD,Layout):
 525                         if (s.layout != UnSet) {
 526                                 pr_err("layout may only be sent once.  "
 527                                        "Second value was %s\n", optarg);
 528                                 exit(2);
 529                         }
 530                         switch(s.level) {
 531                         default:
 532                                 pr_err("layout not meaningful for %s arrays.\n",
 533                                         map_num(pers, s.level));
 534                                 exit(2);
 535                         case UnSet:
 536                                 pr_err("raid level must be given before layout.\n");
 537                                 exit(2);
 538
 539                         case 5:
 540                                 s.layout = map_name(r5layout, optarg);
 541                                 if (s.layout==UnSet) {
 542                                         pr_err("layout %s not understood for raid5.\n",
 543                                                 optarg);
 544                                         exit(2);
 545                                 }
 546                                 break;
 547                         case 6:
 548                                 s.layout = map_name(r6layout, optarg);
 549                                 if (s.layout==UnSet) {
 550                                         pr_err("layout %s not understood for raid6.\n",
 551                                                 optarg);
 552                                         exit(2);
 553                                 }
 554                                 break;
 555
 556                         case 10:
 557                                 s.layout = parse_layout_10(optarg);
 558                                 if (s.layout < 0) {
 559                                         pr_err("layout for raid10 must be 'nNN', 'oNN' or 'fNN' where NN is a number, not %s\n", optarg);
 560                                         exit(2);
 561                                 }
 562                                 break;
 563                         case LEVEL_FAULTY:
 564                                 /* Faulty
 565                                  * modeNNN
 566                                  */
 567                                 s.layout = parse_layout_faulty(optarg);
 568                                 if (s.layout == -1) {
 569                                         pr_err("layout %s not understood for faulty.\n",
 570                                                 optarg);
 571                                         exit(2);
 572                                 }
 573                                 break;
 574                         }
 575                         continue;
 576
 577                 case O(CREATE,AssumeClean):
 578                 case O(BUILD,AssumeClean): /* assume clean */
 579                 case O(GROW,AssumeClean):
 580                         s.assume_clean = 1;
 581                         continue;
 582
 583                 case O(GROW,'n'):
 584                 case O(CREATE,'n'):
 585                 case O(BUILD,'n'): /* number of raid disks */
 586                         if (s.raiddisks) {
 587                                 pr_err("raid-devices set twice: %d and %s\n",
 588                                         s.raiddisks, optarg);
 589                                 exit(2);
 590                         }
 591                         s.raiddisks = parse_num(optarg);
 592                         if (s.raiddisks <= 0) {
 593                                 pr_err("invalid number of raid devices: %s\n",
 594                                         optarg);
 595                                 exit(2);
 596                         }
 597                         ident.raid_disks = s.raiddisks;
 598                         continue;
 599
 600                 case O(CREATE,'x'): /* number of spare (eXtra) disks */
 601                         if (s.sparedisks) {
 602                                 pr_err("spare-devices set twice: %d and %s\n",
 603                                        s.sparedisks, optarg);
 604                                 exit(2);
 605                         }
 606                         if (s.level != UnSet && s.level <= 0 && s.level >= -1) {
 607                                 pr_err("spare-devices setting is incompatible with raid level %d\n",
 608                                         s.level);
 609                                 exit(2);
 610                         }
 611                         s.sparedisks = parse_num(optarg);
 612                         if (s.sparedisks < 0) {
 613                                 pr_err("invalid number of spare-devices: %s\n",
 614                                         optarg);
 615                                 exit(2);
 616                         }
 617                         continue;
 618
 619                 case O(CREATE,'a'):
 620                 case O(CREATE,Auto):
 621                 case O(BUILD,'a'):
 622                 case O(BUILD,Auto):
 623                 case O(INCREMENTAL,'a'):
 624                 case O(INCREMENTAL,Auto):
 625                 case O(ASSEMBLE,'a'):
 626                 case O(ASSEMBLE,Auto): /* auto-creation of device node */
 627                         c.autof = parse_auto(optarg, "--auto flag", 0);
 628                         continue;
 629
 630                 case O(CREATE,Symlinks):
 631                 case O(BUILD,Symlinks):
 632                 case O(ASSEMBLE,Symlinks): /* auto creation of symlinks in /dev to /dev/md */
 633                         symlinks = optarg;
 634                         continue;
 635
 636                 case O(BUILD,'f'): /* force honouring '-n 1' */
 637                 case O(BUILD,Force): /* force honouring '-n 1' */
 638                 case O(GROW,'f'): /* ditto */
 639                 case O(GROW,Force): /* ditto */
 640                 case O(CREATE,'f'): /* force honouring of device list */
 641                 case O(CREATE,Force): /* force honouring of device list */
 642                 case O(ASSEMBLE,'f'): /* force assembly */
 643                 case O(ASSEMBLE,Force): /* force assembly */
 644                 case O(MISC,'f'): /* force zero */
 645                 case O(MISC,Force): /* force zero */
 646                 case O(MANAGE,Force): /* add device which is too large */
 647                         c.force=1;
 648                         continue;
 649                         /* now for the Assemble options */
 650                 case O(ASSEMBLE, FreezeReshape):   /* Freeze reshape during
 651                                                     * initrd phase */
 652                 case O(INCREMENTAL, FreezeReshape):
 653                         c.freeze_reshape = 1;
 654                         continue;
 655                 case O(CREATE,'u'): /* uuid of array */
 656                 case O(ASSEMBLE,'u'): /* uuid of array */
 657                         if (ident.uuid_set) {
 658                                 pr_err("uuid cannot be set twice.  "
 659                                         "Second value %s.\n", optarg);
 660                                 exit(2);
 661                         }
 662                         if (parse_uuid(optarg, ident.uuid))
 663                                 ident.uuid_set = 1;
 664                         else {
 665                                 pr_err("Bad uuid: %s\n", optarg);
 666                                 exit(2);
 667                         }
 668                         continue;
 669
 670                 case O(CREATE,'N'):
 671                 case O(ASSEMBLE,'N'):
 672                 case O(MISC,'N'):
 673                         if (ident.name[0]) {
 674                                 pr_err("name cannot be set twice.   "
 675                                         "Second value %s.\n", optarg);
 676                                 exit(2);
 677                         }
 678                         if (mode == MISC && !c.subarray) {
 679                                 pr_err("-N/--name only valid with --update-subarray in misc mode\n");
 680                                 exit(2);
 681                         }
 682                         if (strlen(optarg) > 32) {
 683                                 pr_err("name '%s' is too long, 32 chars max.\n",
 684                                         optarg);
 685                                 exit(2);
 686                         }
 687                         strcpy(ident.name, optarg);
 688                         continue;
 689
 690                 case O(ASSEMBLE,'m'): /* super-minor for array */
 691                 case O(ASSEMBLE,SuperMinor):
 692                         if (ident.super_minor != UnSet) {
 693                                 pr_err("super-minor cannot be set twice.  "
 694                                         "Second value: %s.\n", optarg);
 695                                 exit(2);
 696                         }
 697                         if (strcmp(optarg, "dev")==0)
 698                                 ident.super_minor = -2;
 699                         else {
 700                                 ident.super_minor = parse_num(optarg);
 701                                 if (ident.super_minor < 0) {
 702                                         pr_err("Bad super-minor number: %s.\n", optarg);
 703                                         exit(2);
 704                                 }
 705                         }
 706                         continue;
 707
 708                 case O(ASSEMBLE,'o'):
 709                 case O(MANAGE,'o'):
 710                 case O(CREATE,'o'):
 711                         c.readonly = 1;
 712                         continue;
 713
 714                 case O(ASSEMBLE,'U'): /* update the superblock */
 715                 case O(MISC,'U'):
 716                         if (c.update) {
 717                                 pr_err("Can only update one aspect"
 718                                         " of superblock, both %s and %s given.\n",
 719                                         c.update, optarg);
 720                                 exit(2);
 721                         }
 722                         if (mode == MISC && !c.subarray) {
 723                                 pr_err("Only subarrays can be"
 724                                         " updated in misc mode\n");
 725                                 exit(2);
 726                         }
 727                         c.update = optarg;
 728                         if (strcmp(c.update, "sparc2.2")==0)
 729                                 continue;
 730                         if (strcmp(c.update, "super-minor") == 0)
 731                                 continue;
 732                         if (strcmp(c.update, "summaries")==0)
 733                                 continue;
 734                         if (strcmp(c.update, "resync")==0)
 735                                 continue;
 736                         if (strcmp(c.update, "uuid")==0)
 737                                 continue;
 738                         if (strcmp(c.update, "name")==0)
 739                                 continue;
 740                         if (strcmp(c.update, "homehost")==0)
 741                                 continue;
 742                         if (strcmp(c.update, "devicesize")==0)
 743                                 continue;
 744                         if (strcmp(c.update, "no-bitmap")==0)
 745                                 continue;
 746                         if (strcmp(c.update, "bbl") == 0)
 747                                 continue;
 748                         if (strcmp(c.update, "no-bbl") == 0)
 749                                 continue;
 750                         if (strcmp(c.update, "byteorder")==0) {
 751                                 if (ss) {
 752                                         pr_err("must not set metadata"
 753                                                " type with --update=byteorder.\n");
 754                                         exit(2);
 755                                 }
 756                                 for(i=0; !ss && superlist[i]; i++)
 757                                         ss = superlist[i]->match_metadata_desc(
 758                                                 "0.swap");
 759                                 if (!ss) {
 760                                         pr_err("INTERNAL ERROR"
 761                                                 " cannot find 0.swap\n");
 762                                         exit(2);
 763                                 }
 764
 765                                 continue;
 766                         }
 767                         if (strcmp(c.update,"?") == 0 ||
 768                             strcmp(c.update, "help") == 0) {
 769                                 outf = stdout;
 770                                 fprintf(outf, Name ": ");
 771                         } else {
 772                                 outf = stderr;
 773                                 fprintf(outf,
 774                                         Name ": '--update=%s' is invalid.  ",
 775                                         c.update);
 776                         }
 777                         fprintf(outf, "Valid --update options are:\n"
 778                 "     'sparc2.2', 'super-minor', 'uuid', 'name', 'resync',\n"
 779                 "     'summaries', 'homehost', 'byteorder', 'devicesize',\n"
 780                 "     'no-bitmap'\n");
 781                         exit(outf == stdout ? 0 : 2);
 782
 783                 case O(MANAGE,'U'):
 784                         /* update=devicesize is allowed with --re-add */
 785                         if (devmode != 'A') {
 786                                 pr_err("--update in Manage mode only"
 787                                         " allowed with --re-add.\n");
 788                                 exit(1);
 789                         }
 790                         if (c.update) {
 791                                 pr_err("Can only update one aspect"
 792                                         " of superblock, both %s and %s given.\n",
 793                                         c.update, optarg);
 794                                 exit(2);
 795                         }
 796                         c.update = optarg;
 797                         if (strcmp(c.update, "devicesize") != 0 &&
 798                             strcmp(c.update, "bbl") != 0 &&
 799                             strcmp(c.update, "no-bbl") != 0) {
 800                                 pr_err("only 'devicesize', 'bbl' and 'no-bbl' can be"
 801                                         " updated with --re-add\n");
 802                                 exit(2);
 803                         }
 804                         continue;
 805
 806                 case O(INCREMENTAL,NoDegraded):
 807                         pr_err("--no-degraded is deprecated in Incremental mode\n");
 808                 case O(ASSEMBLE,NoDegraded): /* --no-degraded */
 809                         c.runstop = -1; /* --stop isn't allowed for --assemble,
 810                                          * so we overload slightly */
 811                         continue;
 812
 813                 case O(ASSEMBLE,'c'):
 814                 case O(ASSEMBLE,ConfigFile):
 815                 case O(INCREMENTAL, 'c'):
 816                 case O(INCREMENTAL, ConfigFile):
 817                 case O(MISC, 'c'):
 818                 case O(MISC, ConfigFile):
 819                 case O(MONITOR,'c'):
 820                 case O(MONITOR,ConfigFile):
 821                         if (configfile) {
 822                                 pr_err("configfile cannot be set twice.  "
 823                                         "Second value is %s.\n", optarg);
 824                                 exit(2);
 825                         }
 826                         configfile = optarg;
 827                         set_conffile(configfile);
 828                         /* FIXME possibly check that config file exists.  Even parse it */
 829                         continue;
 830                 case O(ASSEMBLE,'s'): /* scan */
 831                 case O(MISC,'s'):
 832                 case O(MONITOR,'s'):
 833                 case O(INCREMENTAL,'s'):
 834                         c.scan = 1;
 835                         continue;
 836
 837                 case O(MONITOR,'m'): /* mail address */
 838                 case O(MONITOR,EMail):
 839                         if (mailaddr)
 840                                 pr_err("only specify one mailaddress. %s ignored.\n",
 841                                         optarg);
 842                         else
 843                                 mailaddr = optarg;
 844                         continue;
 845
 846                 case O(MONITOR,'p'): /* alert program */
 847                 case O(MONITOR,ProgramOpt): /* alert program */
 848                         if (program)
 849                                 pr_err("only specify one alter program. %s ignored.\n",
 850                                         optarg);
 851                         else
 852                                 program = optarg;
 853                         continue;
 854
 855                 case O(MONITOR,'r'): /* rebuild increments */
 856                 case O(MONITOR,Increment):
 857                         increments = atoi(optarg);
 858                         if (increments > 99 || increments < 1) {
 859                                 pr_err("please specify positive integer between 1 and 99 as rebuild increments.\n");
 860                                 exit(2);
 861                         }
 862                         continue;
 863
 864                 case O(MONITOR,'d'): /* delay in seconds */
 865                 case O(GROW, 'd'):
 866                 case O(BUILD,'d'): /* delay for bitmap updates */
 867                 case O(CREATE,'d'):
 868                         if (c.delay)
 869                                 pr_err("only specify delay once. %s ignored.\n",
 870                                         optarg);
 871                         else {
 872                                 c.delay = parse_num(optarg);
 873                                 if (c.delay < 1) {
 874                                         pr_err("invalid delay: %s\n",
 875                                                 optarg);
 876                                         exit(2);
 877                                 }
 878                         }
 879                         continue;
 880                 case O(MONITOR,'f'): /* daemonise */
 881                 case O(MONITOR,Fork):
 882                         daemonise = 1;
 883                         continue;
 884                 case O(MONITOR,'i'): /* pid */
 885                         if (pidfile)
 886                                 pr_err("only specify one pid file. %s ignored.\n",
 887                                         optarg);
 888                         else
 889                                 pidfile = optarg;
 890                         continue;
 891                 case O(MONITOR,'1'): /* oneshot */
 892                         oneshot = 1;
 893                         spare_sharing = 0;
 894                         continue;
 895                 case O(MONITOR,'t'): /* test */
 896                         c.test = 1;
 897                         continue;
 898                 case O(MONITOR,'y'): /* log messages to syslog */
 899                         openlog("mdadm", LOG_PID, SYSLOG_FACILITY);
 900                         dosyslog = 1;
 901                         continue;
 902                 case O(MONITOR, NoSharing):
 903                         spare_sharing = 0;
 904                         continue;
 905
 906                         /* now the general management options.  Some are applicable
 907                          * to other modes. None have arguments.
 908                          */
 909                 case O(GROW,'a'):
 910                 case O(GROW,Add):
 911                 case O(MANAGE,'a'):
 912                 case O(MANAGE,Add): /* add a drive */
 913                         devmode = 'a';
 914                         continue;
 915                 case O(MANAGE,ReAdd):
 916                         devmode = 'A';
 917                         continue;
 918                 case O(MANAGE,'r'): /* remove a drive */
 919                 case O(MANAGE,Remove):
 920                         devmode = 'r';
 921                         continue;
 922                 case O(MANAGE,'f'): /* set faulty */
 923                 case O(MANAGE,Fail):
 924                 case O(INCREMENTAL,'f'):
 925                 case O(INCREMENTAL,Remove):
 926                 case O(INCREMENTAL,Fail): /* r for incremental is taken, use f
 927                                            * even though we will both fail and
 928                                            * remove the device */
 929                         devmode = 'f';
 930                         continue;
 931                 case O(INCREMENTAL,'R'):
 932                 case O(MANAGE,'R'):
 933                 case O(ASSEMBLE,'R'):
 934                 case O(BUILD,'R'):
 935                 case O(CREATE,'R'): /* Run the array */
 936                         if (c.runstop < 0) {
 937                                 pr_err("Cannot both Stop and Run an array\n");
 938                                 exit(2);
 939                         }
 940                         c.runstop = 1;
 941                         continue;
 942                 case O(MANAGE,'S'):
 943                         if (c.runstop > 0) {
 944                                 pr_err("Cannot both Run and Stop an array\n");
 945                                 exit(2);
 946                         }
 947                         c.runstop = -1;
 948                         continue;
 949                 case O(MANAGE,'t'):
 950                         c.test = 1;
 951                         continue;
 952
 953                 case O(MISC,'Q'):
 954                 case O(MISC,'D'):
 955                 case O(MISC,'E'):
 956                 case O(MISC,KillOpt):
 957                 case O(MISC,'R'):
 958                 case O(MISC,'S'):
 959                 case O(MISC,'X'):
 960                 case O(MISC,'o'):
 961                 case O(MISC,'w'):
 962                 case O(MISC,'W'):
 963                 case O(MISC, WaitOpt):
 964                 case O(MISC, Waitclean):
 965                 case O(MISC, DetailPlatform):
 966                 case O(MISC, KillSubarray):
 967                 case O(MISC, UpdateSubarray):
 968                         if (opt == KillSubarray || opt == UpdateSubarray) {
 969                                 if (c.subarray) {
 970                                         pr_err("subarray can only"
 971                                                 " be specified once\n");
 972                                         exit(2);
 973                                 }
 974                                 c.subarray = optarg;
 975                         }
 976                         if (devmode && devmode != opt &&
 977                             (devmode == 'E' || (opt == 'E' && devmode != 'Q'))) {
 978                                 pr_err("--examine/-E cannot be given with ");
 979                                 if (devmode == 'E') {
 980                                         if (option_index >= 0)
 981                                                 fprintf(stderr, "--%s\n",
 982                                                         long_options[option_index].name);
 983                                         else
 984                                                 fprintf(stderr, "-%c\n", opt);
 985                                 } else if (isalpha(devmode))
 986                                         fprintf(stderr, "-%c\n", devmode);
 987                                 else
 988                                         fprintf(stderr, "previous option\n");
 989                                 exit(2);
 990                         }
 991                         devmode = opt;
 992                         continue;
 993                 case O(MISC, UdevRules):
 994                         if (devmode && devmode != opt) {
 995                                 pr_err("--udev-rules must"
 996                                        " be the only option.\n");
 997                         } else {
 998                                 if (udev_filename)
 999                                         pr_err("only specify one udev "
1000                                                 "rule filename. %s ignored.\n",
1001                                                 optarg);
1002                                 else
1003                                         udev_filename = optarg;
1004                         }
1005                         devmode = opt;
1006                         continue;
1007                 case O(MISC,'t'):
1008                         c.test = 1;
1009                         continue;
1010
1011                 case O(MISC, Sparc22):
1012                         if (devmode != 'E') {
1013                                 pr_err("--sparc2.2 only allowed with --examine\n");
1014                                 exit(2);
1015                         }
1016                         c.SparcAdjust = 1;
1017                         continue;
1018
1019                 case O(ASSEMBLE,'b'): /* here we simply set the bitmap file */
1020                 case O(ASSEMBLE,Bitmap):
1021                         if (!optarg) {
1022                                 pr_err("bitmap file needed with -b in --assemble mode\n");
1023                                 exit(2);
1024                         }
1025                         if (strcmp(optarg, "internal")==0) {
1026                                 pr_err("there is no need to specify --bitmap when assembling arrays with internal bitmaps\n");
1027                                 continue;
1028                         }
1029                         bitmap_fd = open(optarg, O_RDWR);
1030                         if (!*optarg || bitmap_fd < 0) {
1031                                 pr_err("cannot open bitmap file %s: %s\n", optarg, strerror(errno));
1032                                 exit(2);
1033                         }
1034                         ident.bitmap_fd = bitmap_fd; /* for Assemble */
1035                         continue;
1036
1037                 case O(ASSEMBLE, BackupFile):
1038                 case O(GROW, BackupFile):
1039                         /* Specify a file into which grow might place a backup,
1040                          * or from which assemble might recover a backup
1041                          */
1042                         if (c.backup_file) {
1043                                 pr_err("backup file already specified, rejecting %s\n", optarg);
1044                                 exit(2);
1045                         }
1046                         c.backup_file = optarg;
1047                         continue;
1048
1049                 case O(GROW, Continue):
1050                         /* Continue interrupted grow
1051                          */
1052                         grow_continue = 1;
1053                         continue;
1054                 case O(ASSEMBLE, InvalidBackup):
1055                         /* Acknowledge that the backupfile is invalid, but ask
1056                          * to continue anyway
1057                          */
1058                         c.invalid_backup = 1;
1059                         continue;
1060
1061                 case O(BUILD,'b'):
1062                 case O(BUILD,Bitmap):
1063                 case O(CREATE,'b'):
1064                 case O(CREATE,Bitmap): /* here we create the bitmap */
1065                         if (strcmp(optarg, "none") == 0) {
1066                                 pr_err("'--bitmap none' only"
1067                                         " supported for --grow\n");
1068                                 exit(2);
1069                         }
1070                         /* FALL THROUGH */
1071                 case O(GROW,'b'):
1072                 case O(GROW,Bitmap):
1073                         if (strcmp(optarg, "internal")== 0 ||
1074                             strcmp(optarg, "none")== 0 ||
1075                             strchr(optarg, '/') != NULL) {
1076                                 s.bitmap_file = optarg;
1077                                 continue;
1078                         }
1079                         /* probable typo */
1080                         pr_err("bitmap file must contain a '/', or be 'internal', or 'none'\n"
1081                                 "       not '%s'\n", optarg);
1082                         exit(2);
1083
1084                 case O(GROW,BitmapChunk):
1085                 case O(BUILD,BitmapChunk):
1086                 case O(CREATE,BitmapChunk): /* bitmap chunksize */
1087                         s.bitmap_chunk = parse_size(optarg);
1088                         if (s.bitmap_chunk == 0 ||
1089                             s.bitmap_chunk == INVALID_SECTORS ||
1090                             s.bitmap_chunk & (s.bitmap_chunk - 1)) {
1091                                 pr_err("invalid bitmap chunksize: %s\n",
1092                                        optarg);
1093                                 exit(2);
1094                         }
1095                         s.bitmap_chunk = s.bitmap_chunk * 512;
1096                         continue;
1097
1098                 case O(GROW, WriteBehind):
1099                 case O(BUILD, WriteBehind):
1100                 case O(CREATE, WriteBehind): /* write-behind mode */
1101                         s.write_behind = DEFAULT_MAX_WRITE_BEHIND;
1102                         if (optarg) {
1103                                 s.write_behind = parse_num(optarg);
1104                                 if (s.write_behind < 0 ||
1105                                     s.write_behind > 16383) {
1106                                         pr_err("Invalid value for maximum outstanding write-behind writes: %s.\n\tMust be between 0 and 16383.\n", optarg);
1107                                         exit(2);
1108                                 }
1109                         }
1110                         continue;
1111
1112                 case O(INCREMENTAL, 'r'):
1113                 case O(INCREMENTAL, RebuildMapOpt):
1114                         rebuild_map = 1;
1115                         continue;
1116                 case O(INCREMENTAL, IncrementalPath):
1117                         remove_path = optarg;
1118                         continue;
1119                 }
1120                 /* We have now processed all the valid options. Anything else is
1121                  * an error
1122                  */
1123                 if (option_index > 0)
1124                         pr_err(":option --%s not valid in %s mode\n",
1125                                 long_options[option_index].name,
1126                                 map_num(modes, mode));
1127                 else
1128                         pr_err("option -%c not valid in %s mode\n",
1129                                 opt, map_num(modes, mode));
1130                 exit(2);
1131
1132         }
1133
1134         if (print_help) {
1135                 char *help_text;
1136                 if (print_help == 2)
1137                         help_text = OptionHelp;
1138                 else
1139                         help_text = mode_help[mode];
1140                 if (help_text == NULL)
1141                         help_text = Help;
1142                 fputs(help_text,stdout);
1143                 exit(0);
1144         }
1145
1146         if (!mode && devs_found) {
1147                 mode = MISC;
1148                 devmode = 'Q';
1149                 if (devlist->disposition == 0)
1150                         devlist->disposition = devmode;
1151         }
1152         if (!mode) {
1153                 fputs(Usage, stderr);
1154                 exit(2);
1155         }
1156
1157         if (symlinks) {
1158                 struct createinfo *ci = conf_get_create_info();
1159
1160                 if (strcasecmp(symlinks, "yes") == 0)
1161                         ci->symlinks = 1;
1162                 else if (strcasecmp(symlinks, "no") == 0)
1163                         ci->symlinks = 0;
1164                 else {
1165                         pr_err("option --symlinks must be 'no' or 'yes'\n");
1166                         exit(2);
1167                 }
1168         }
1169         /* Ok, got the option parsing out of the way
1170          * hopefully it's mostly right but there might be some stuff
1171          * missing
1172          *
1173          * That is mosty checked in the per-mode stuff but...
1174          *
1175          * For @,B,C and A without -s, the first device listed must be
1176          * an md device.  We check that here and open it.
1177          */
1178
1179         if (mode == MANAGE || mode == BUILD || mode == CREATE
1180             || mode == GROW
1181             || (mode == ASSEMBLE && ! c.scan)) {
1182                 if (devs_found < 1) {
1183                         pr_err("an md device must be given in this mode\n");
1184                         exit(2);
1185                 }
1186                 if ((int)ident.super_minor == -2 && c.autof) {
1187                         pr_err("--super-minor=dev is incompatible with --auto\n");
1188                         exit(2);
1189                 }
1190                 if (mode == MANAGE || mode == GROW) {
1191                         mdfd = open_mddev(devlist->devname, 1);
1192                         if (mdfd < 0)
1193                                 exit(1);
1194                 } else
1195                         /* non-existent device is OK */
1196                         mdfd = open_mddev(devlist->devname, 0);
1197                 if (mdfd == -2) {
1198                         pr_err("device %s exists but is not an "
1199                                 "md array.\n", devlist->devname);
1200                         exit(1);
1201                 }
1202                 if ((int)ident.super_minor == -2) {
1203                         struct stat stb;
1204                         if (mdfd < 0) {
1205                                 pr_err("--super-minor=dev given, and "
1206                                         "listed device %s doesn't exist.\n",
1207                                         devlist->devname);
1208                                 exit(1);
1209                         }
1210                         fstat(mdfd, &stb);
1211                         ident.super_minor = minor(stb.st_rdev);
1212                 }
1213                 if (mdfd >= 0 && mode != MANAGE && mode != GROW) {
1214                         /* We don't really want this open yet, we just might
1215                          * have wanted to check some things
1216                          */
1217                         close(mdfd);
1218                         mdfd = -1;
1219                 }
1220         }
1221
1222         if (s.raiddisks) {
1223                 if (s.raiddisks == 1 &&  !c.force && s.level != LEVEL_FAULTY) {
1224                         pr_err("'1' is an unusual number of drives for an array, so it is probably\n"
1225                                 "     a mistake.  If you really mean it you will need to specify --force before\n"
1226                                 "     setting the number of drives.\n");
1227                         exit(2);
1228                 }
1229         }
1230
1231         if (c.homehost == NULL)
1232                 c.homehost = conf_get_homehost(&c.require_homehost);
1233         if (c.homehost == NULL || strcasecmp(c.homehost, "<system>")==0) {
1234                 if (gethostname(sys_hostname, sizeof(sys_hostname)) == 0) {
1235                         sys_hostname[sizeof(sys_hostname)-1] = 0;
1236                         c.homehost = sys_hostname;
1237                 }
1238         }
1239         if (c.homehost && (!c.homehost[0] || strcasecmp(c.homehost, "<none>") == 0)) {
1240                 c.homehost = NULL;
1241                 c.require_homehost = 0;
1242         }
1243
1244         if ((mode == MISC && devmode == 'E')
1245             || (mode == MONITOR && spare_sharing == 0))
1246                 /* Anyone may try this */;
1247         else if (geteuid() != 0) {
1248                 pr_err("must be super-user to perform this action\n");
1249                 exit(1);
1250         }
1251
1252         ident.autof = c.autof;
1253
1254         if (c.scan && c.verbose < 2)
1255                 /* --scan implied --brief unless -vv */
1256                 c.brief = 1;
1257
1258         rv = 0;
1259         switch(mode) {
1260         case MANAGE:
1261                 /* readonly, add/remove, readwrite, runstop */
1262                 if (c.readonly > 0)
1263                         rv = Manage_ro(devlist->devname, mdfd, c.readonly);
1264                 if (!rv && devs_found>1)
1265                         rv = Manage_subdevs(devlist->devname, mdfd,
1266                                             devlist->next, c.verbose, c.test,
1267                                             c.update, c.force);
1268                 if (!rv && c.readonly < 0)
1269                         rv = Manage_ro(devlist->devname, mdfd, c.readonly);
1270                 if (!rv && c.runstop)
1271                         rv = Manage_runstop(devlist->devname, mdfd, c.runstop, c.verbose, 0);
1272                 break;
1273         case ASSEMBLE:
1274                 if (devs_found == 1 && ident.uuid_set == 0 &&
1275                     ident.super_minor == UnSet && ident.name[0] == 0 && !c.scan ) {
1276                         /* Only a device has been given, so get details from config file */
1277                         struct mddev_ident *array_ident = conf_get_ident(devlist->devname);
1278                         if (array_ident == NULL) {
1279                                 pr_err("%s not identified in config file.\n",
1280                                         devlist->devname);
1281                                 rv |= 1;
1282                                 if (mdfd >= 0)
1283                                         close(mdfd);
1284                         } else {
1285                                 if (array_ident->autof == 0)
1286                                         array_ident->autof = c.autof;
1287                                 rv |= Assemble(ss, devlist->devname, array_ident,
1288                                                NULL, &c);
1289                         }
1290                 } else if (!c.scan)
1291                         rv = Assemble(ss, devlist->devname, &ident,
1292                                       devlist->next, &c);
1293                 else if (devs_found > 0) {
1294                         if (c.update && devs_found > 1) {
1295                                 pr_err("can only update a single array at a time\n");
1296                                 exit(1);
1297                         }
1298                         if (c.backup_file && devs_found > 1) {
1299                                 pr_err("can only assemble a single array when providing a backup file.\n");
1300                                 exit(1);
1301                         }
1302                         for (dv = devlist ; dv ; dv=dv->next) {
1303                                 struct mddev_ident *array_ident = conf_get_ident(dv->devname);
1304                                 if (array_ident == NULL) {
1305                                         pr_err("%s not identified in config file.\n",
1306                                                 dv->devname);
1307                                         rv |= 1;
1308                                         continue;
1309                                 }
1310                                 if (array_ident->autof == 0)
1311                                         array_ident->autof = c.autof;
1312                                 rv |= Assemble(ss, dv->devname, array_ident,
1313                                                NULL, &c);
1314                         }
1315                 } else {
1316                         if (c.update) {
1317                                 pr_err("--update not meaningful with a --scan assembly.\n");
1318                                 exit(1);
1319                         }
1320                         if (c.backup_file) {
1321                                 pr_err("--backup_file not meaningful with a --scan assembly.\n");
1322                                 exit(1);
1323                         }
1324                         rv = scan_assemble(ss, &c, &ident);
1325                 }
1326
1327                 break;
1328         case BUILD:
1329                 if (c.delay == 0)
1330                         c.delay = DEFAULT_BITMAP_DELAY;
1331                 if (s.write_behind && !s.bitmap_file) {
1332                         pr_err("write-behind mode requires a bitmap.\n");
1333                         rv = 1;
1334                         break;
1335                 }
1336                 if (s.raiddisks == 0) {
1337                         pr_err("no raid-devices specified.\n");
1338                         rv = 1;
1339                         break;
1340                 }
1341
1342                 if (s.bitmap_file) {
1343                         if (strcmp(s.bitmap_file, "internal")==0) {
1344                                 pr_err("'internal' bitmaps not supported with --build\n");
1345                                 rv |= 1;
1346                                 break;
1347                         }
1348                 }
1349                 rv = Build(devlist->devname, devlist->next, &s, &c);
1350                 break;
1351         case CREATE:
1352                 if (c.delay == 0)
1353                         c.delay = DEFAULT_BITMAP_DELAY;
1354                 if (s.write_behind && !s.bitmap_file) {
1355                         pr_err("write-behind mode requires a bitmap.\n");
1356                         rv = 1;
1357                         break;
1358                 }
1359                 if (s.raiddisks == 0) {
1360                         pr_err("no raid-devices specified.\n");
1361                         rv = 1;
1362                         break;
1363                 }
1364
1365                 rv = Create(ss, devlist->devname,
1366                             ident.name, ident.uuid_set ? ident.uuid : NULL,
1367                             devs_found-1, devlist->next,
1368                             &s, &c, data_offset);
1369                 break;
1370         case MISC:
1371                 if (devmode == 'E') {
1372                         if (devlist == NULL && !c.scan) {
1373                                 pr_err("No devices to examine\n");
1374                                 exit(2);
1375                         }
1376                         if (devlist == NULL)
1377                                 devlist = conf_get_devs();
1378                         if (devlist == NULL) {
1379                                 pr_err("No devices listed in %s\n", configfile?configfile:DefaultConfFile);
1380                                 exit(1);
1381                         }
1382                         rv = Examine(devlist, &c, ss);
1383                 } else if (devmode == DetailPlatform) {
1384                         rv = Detail_Platform(ss ? ss->ss : NULL, ss ? c.scan : 1,
1385                                              c.verbose, c.export,
1386                                              devlist ? devlist->devname : NULL);
1387                 } else if (devlist == NULL) {
1388                         if (devmode == 'S' && c.scan)
1389                                 rv = stop_scan(c.verbose);
1390                         else if ((devmode == 'D' || devmode == Waitclean) && c.scan)
1391                                 rv = misc_scan(devmode, &c);
1392                         else if (devmode == UdevRules)
1393                                 rv = Write_rules(udev_filename);
1394                         else {
1395                                 pr_err("No devices given.\n");
1396                                 exit(2);
1397                         }
1398                 } else
1399                         rv = misc_list(devlist, &ident, ss, &c);
1400                 break;
1401         case MONITOR:
1402                 if (!devlist && !c.scan) {
1403                         pr_err("Cannot monitor: need --scan or at least one device\n");
1404                         rv = 1;
1405                         break;
1406                 }
1407                 if (pidfile && !daemonise) {
1408                         pr_err("Cannot write a pid file when not in daemon mode\n");
1409                         rv = 1;
1410                         break;
1411                 }
1412                 if (c.delay == 0) {
1413                         if (get_linux_version() > 2006016)
1414                                 /* mdstat responds to poll */
1415                                 c.delay = 1000;
1416                         else
1417                                 c.delay = 60;
1418                 }
1419                 if (c.delay == 0)
1420                         c.delay = 60;
1421                 rv= Monitor(devlist, mailaddr, program,
1422                             &c, daemonise, oneshot,
1423                             dosyslog, pidfile, increments,
1424                             spare_sharing);
1425                 break;
1426
1427         case GROW:
1428                 if (array_size > 0) {
1429                         /* alway impose array size first, independent of
1430                          * anything else
1431                          * Do not allow level or raid_disks changes at the
1432                          * same time as that can be irreversibly destructive.
1433                          */
1434                         struct mdinfo sra;
1435                         int err;
1436                         if (s.raiddisks || s.level != UnSet) {
1437                                 pr_err("cannot change array size in same operation "
1438                                         "as changing raiddisks or level.\n"
1439                                         "    Change size first, then check that data is still intact.\n");
1440                                 rv = 1;
1441                                 break;
1442                         }
1443                         sysfs_init(&sra, mdfd, 0);
1444                         if (array_size == MAX_SIZE)
1445                                 err = sysfs_set_str(&sra, NULL, "array_size", "default");
1446                         else
1447                                 err = sysfs_set_num(&sra, NULL, "array_size", array_size / 2);
1448                         if (err < 0) {
1449                                 if (errno == E2BIG)
1450                                         pr_err("--array-size setting"
1451                                                 " is too large.\n");
1452                                 else
1453                                         pr_err("current kernel does"
1454                                                 " not support setting --array-size\n");
1455                                 rv = 1;
1456                                 break;
1457                         }
1458                 }
1459                 if (devs_found > 1 && s.raiddisks == 0) {
1460                         /* must be '-a'. */
1461                         if (s.size > 0 || s.chunk || s.layout_str != NULL || s.bitmap_file) {
1462                                 pr_err("--add cannot be used with "
1463                                         "other geometry changes in --grow mode\n");
1464                                 rv = 1;
1465                                 break;
1466                         }
1467                         for (dv=devlist->next; dv ; dv=dv->next) {
1468                                 rv = Grow_Add_device(devlist->devname, mdfd,
1469                                                      dv->devname);
1470                                 if (rv)
1471                                         break;
1472                         }
1473                 } else if (s.bitmap_file) {
1474                         if (s.size > 0 || s.raiddisks || s.chunk ||
1475                             s.layout_str != NULL || devs_found > 1) {
1476                                 pr_err("--bitmap changes cannot be "
1477                                         "used with other geometry changes "
1478                                         "in --grow mode\n");
1479                                 rv = 1;
1480                                 break;
1481                         }
1482                         if (c.delay == 0)
1483                                 c.delay = DEFAULT_BITMAP_DELAY;
1484                         rv = Grow_addbitmap(devlist->devname, mdfd, &c, &s);
1485                 } else if (grow_continue)
1486                         rv = Grow_continue_command(devlist->devname,
1487                                                    mdfd, c.backup_file,
1488                                                    c.verbose);
1489                 else if (s.size > 0 || s.raiddisks || s.layout_str != NULL
1490                          || s.chunk != 0 || s.level != UnSet) {
1491                         rv = Grow_reshape(devlist->devname, mdfd,
1492                                           devlist->next,
1493                                           data_offset, &c, &s);
1494                 } else if (array_size == 0)
1495                         pr_err("no changes to --grow\n");
1496                 break;
1497         case INCREMENTAL:
1498                 if (rebuild_map) {
1499                         RebuildMap();
1500                 }
1501                 if (c.scan) {
1502                         if (c.runstop <= 0) {
1503                                 pr_err("--incremental --scan meaningless without --run.\n");
1504                                 break;
1505                         }
1506                         if (devmode == 'f') {
1507                                 pr_err("--incremental --scan --fail not supported.\n");
1508                                 break;
1509                         }
1510                         rv = IncrementalScan(c.verbose);
1511                 }
1512                 if (!devlist) {
1513                         if (!rebuild_map && !c.scan) {
1514                                 pr_err("--incremental requires a device.\n");
1515                                 rv = 1;
1516                         }
1517                         break;
1518                 }
1519                 if (devlist->next) {
1520                         pr_err("--incremental can only handle one device.\n");
1521                         rv = 1;
1522                         break;
1523                 }
1524                 if (devmode == 'f')
1525                         rv = IncrementalRemove(devlist->devname, remove_path,
1526                                                c.verbose);
1527                 else
1528                         rv = Incremental(devlist->devname, &c, ss);
1529                 break;
1530         case AUTODETECT:
1531                 autodetect();
1532                 break;
1533         }
1534         exit(rv);
1535 }
1536
1537 static int scan_assemble(struct supertype *ss,
1538                          struct context *c,
1539                          struct mddev_ident *ident)
1540 {
1541         struct mddev_ident *a, *array_list =  conf_get_ident(NULL);
1542         struct mddev_dev *devlist = conf_get_devs();
1543         struct map_ent *map = NULL;
1544         int cnt = 0;
1545         int rv = 0;
1546         int failures, successes;
1547
1548         if (conf_verify_devnames(array_list)) {
1549                 pr_err("Duplicate MD device names in "
1550                        "conf file were found.\n");
1551                 return 1;
1552         }
1553         if (devlist == NULL) {
1554                 pr_err("No devices listed in conf file were found.\n");
1555                 return 1;
1556         }
1557         for (a = array_list; a ; a = a->next) {
1558                 a->assembled = 0;
1559                 if (a->autof == 0)
1560                         a->autof = c->autof;
1561         }
1562         if (map_lock(&map))
1563                 pr_err("%s: failed to get "
1564                        "exclusive lock on mapfile\n",
1565                        __func__);
1566         do {
1567                 failures = 0;
1568                 successes = 0;
1569                 rv = 0;
1570                 for (a = array_list; a ; a = a->next) {
1571                         int r;
1572                         if (a->assembled)
1573                                 continue;
1574                         if (a->devname &&
1575                             strcasecmp(a->devname, "<ignore>") == 0)
1576                                 continue;
1577
1578                         r = Assemble(ss, a->devname,
1579                                      a, NULL, c);
1580                         if (r == 0) {
1581                                 a->assembled = 1;
1582                                 successes++;
1583                         } else
1584                                 failures++;
1585                         rv |= r;
1586                         cnt++;
1587                 }
1588         } while (failures && successes);
1589         if (c->homehost && cnt == 0) {
1590                 /* Maybe we can auto-assemble something.
1591                  * Repeatedly call Assemble in auto-assemble mode
1592                  * until it fails
1593                  */
1594                 int rv2;
1595                 int acnt;
1596                 ident->autof = c->autof;
1597                 do {
1598                         struct mddev_dev *devlist = conf_get_devs();
1599                         acnt = 0;
1600                         do {
1601                                 rv2 = Assemble(ss, NULL,
1602                                                ident,
1603                                                devlist, c);
1604                                 if (rv2==0) {
1605                                         cnt++;
1606                                         acnt++;
1607                                 }
1608                         } while (rv2!=2);
1609                         /* Incase there are stacked devices, we need to go around again */
1610                 } while (acnt);
1611                 if (cnt == 0 && rv == 0) {
1612                         pr_err("No arrays found in config file or automatically\n");
1613                         rv = 1;
1614                 } else if (cnt)
1615                         rv = 0;
1616         } else if (cnt == 0 && rv == 0) {
1617                 pr_err("No arrays found in config file\n");
1618                 rv = 1;
1619         }
1620         map_unlock(&map);
1621         return rv;
1622 }
1623
1624 static int misc_scan(char devmode, struct context *c)
1625 {
1626         /* apply --detail or --wait-clean to
1627          * all devices in /proc/mdstat
1628          */
1629         struct mdstat_ent *ms = mdstat_read(0, 1);
1630         struct mdstat_ent *e;
1631         struct map_ent *map = NULL;
1632         int members;
1633         int rv = 0;
1634
1635         for (members = 0; members <= 1; members++) {
1636                 for (e=ms ; e ; e=e->next) {
1637                         char *name;
1638                         struct map_ent *me;
1639                         int member = e->metadata_version &&
1640                                 strncmp(e->metadata_version,
1641                                         "external:/", 10) == 0;
1642                         if (members != member)
1643                                 continue;
1644                         me = map_by_devnum(&map, e->devnum);
1645                         if (me && me->path
1646                             && strcmp(me->path, "/unknown") != 0)
1647                                 name = me->path;
1648                         else
1649                                 name = get_md_name(e->devnum);
1650
1651                         if (!name) {
1652                                 pr_err("cannot find device file for %s\n",
1653                                         e->dev);
1654                                 continue;
1655                         }
1656                         if (devmode == 'D')
1657                                 rv |= Detail(name, c);
1658                         else
1659                                 rv |= WaitClean(name, -1, c->verbose);
1660                         put_md_name(name);
1661                 }
1662         }
1663         free_mdstat(ms);
1664         return rv;
1665 }
1666
1667 static int stop_scan(int verbose)
1668 {
1669         /* apply --stop to all devices in /proc/mdstat */
1670         /* Due to possible stacking of devices, repeat until
1671          * nothing more can be stopped
1672          */
1673         int progress=1, err;
1674         int last = 0;
1675         int rv = 0;
1676         do {
1677                 struct mdstat_ent *ms = mdstat_read(0, 0);
1678                 struct mdstat_ent *e;
1679
1680                 if (!progress) last = 1;
1681                 progress = 0; err = 0;
1682                 for (e=ms ; e ; e=e->next) {
1683                         char *name = get_md_name(e->devnum);
1684                         int mdfd;
1685
1686                         if (!name) {
1687                                 pr_err("cannot find device file for %s\n",
1688                                         e->dev);
1689                                 continue;
1690                         }
1691                         mdfd = open_mddev(name, 1);
1692                         if (mdfd >= 0) {
1693                                 if (Manage_runstop(name, mdfd, -1, verbose, !last))
1694                                         err = 1;
1695                                 else
1696                                         progress = 1;
1697                                 close(mdfd);
1698                         }
1699
1700                         put_md_name(name);
1701                 }
1702                 free_mdstat(ms);
1703         } while (!last && err);
1704         if (err)
1705                 rv |= 1;
1706         return rv;
1707 }
1708
1709 static int misc_list(struct mddev_dev *devlist,
1710                      struct mddev_ident *ident,
1711                      struct supertype *ss, struct context *c)
1712 {
1713         struct mddev_dev *dv;
1714         int rv = 0;
1715
1716         for (dv=devlist ; dv; dv=dv->next) {
1717                 int mdfd;
1718
1719                 switch(dv->disposition) {
1720                 case 'D':
1721                         rv |= Detail(dv->devname, c);
1722                         continue;
1723                 case KillOpt: /* Zero superblock */
1724                         if (ss)
1725                                 rv |= Kill(dv->devname, ss, c->force, c->verbose,0);
1726                         else {
1727                                 int v = c->verbose;
1728                                 do {
1729                                         rv |= Kill(dv->devname, NULL, c->force, v, 0);
1730                                         v = -1;
1731                                 } while (rv == 0);
1732                                 rv &= ~2;
1733                         }
1734                         continue;
1735                 case 'Q':
1736                         rv |= Query(dv->devname); continue;
1737                 case 'X':
1738                         rv |= ExamineBitmap(dv->devname, c->brief, ss); continue;
1739                 case 'W':
1740                 case WaitOpt:
1741                         rv |= Wait(dv->devname); continue;
1742                 case Waitclean:
1743                         rv |= WaitClean(dv->devname, -1, c->verbose); continue;
1744                 case KillSubarray:
1745                         rv |= Kill_subarray(dv->devname, c->subarray, c->verbose);
1746                         continue;
1747                 case UpdateSubarray:
1748                         if (c->update == NULL) {
1749                                 pr_err("-U/--update must be specified with --update-subarray\n");
1750                                 rv |= 1;
1751                                 continue;
1752                         }
1753                         rv |= Update_subarray(dv->devname, c->subarray,
1754                                               c->update, ident, c->verbose);
1755                         continue;
1756                 }
1757                 mdfd = open_mddev(dv->devname, 1);
1758                 if (mdfd>=0) {
1759                         switch(dv->disposition) {
1760                         case 'R':
1761                                 rv |= Manage_runstop(dv->devname, mdfd, 1, c->verbose, 0); break;
1762                         case 'S':
1763                                 rv |= Manage_runstop(dv->devname, mdfd, -1, c->verbose, 0); break;
1764                         case 'o':
1765                                 rv |= Manage_ro(dv->devname, mdfd, 1); break;
1766                         case 'w':
1767                                 rv |= Manage_ro(dv->devname, mdfd, -1); break;
1768                         }
1769                         close(mdfd);
1770                 } else
1771                         rv |= 1;
1772         }
1773         return rv;
1774 }