mdadm.c

   1 /*
   2  * mdadm - manage Linux "md" devices aka RAID arrays.
   3  *
   4  * Copyright (C) 2001-2012 Neil Brown <neilb@suse.de>
   5  *
   6  *
   7  *    This program is free software; you can redistribute it and/or modify
   8  *    it under the terms of the GNU General Public License as published by
   9  *    the Free Software Foundation; either version 2 of the License, or
  10  *    (at your option) any later version.
  11  *
  12  *    This program is distributed in the hope that it will be useful,
  13  *    but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  *    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15  *    GNU General Public License for more details.
  16  *
  17  *    You should have received a copy of the GNU General Public License
  18  *    along with this program; if not, write to the Free Software
  19  *    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  20  *
  21  *    Author: Neil Brown
  22  *    Email: <neilb@suse.de>
  23  *
  24  *    Additions for bitmap and write-behind RAID options, Copyright (C) 2003-2004,
  25  *    Paul Clements, SteelEye Technology, Inc.
  26  */
  27
  28 #include "mdadm.h"
  29 #include "md_p.h"
  30 #include <ctype.h>
  31
  32
  33 static int scan_assemble(int autof, struct supertype *ss,
  34                          int readonly, int runstop,
  35                          struct mddev_ident *ident,
  36                          char *homehost, int require_homehost,
  37                          int verbose, int force,
  38                          int freeze_reshape);
  39 static int misc_scan(char devmode, int verbose, int export, int test,
  40                      char *homehost, char *prefer);
  41 static int stop_scan(int verbose);
  42 static int misc_list(struct mddev_dev *devlist,
  43                      int brief, int verbose, int export, int test,
  44                      char *homehost, char *prefer, char *subarray,
  45                      char *update, struct mddev_ident *ident,
  46                      struct supertype *ss, int force);
  47
  48
  49 int main(int argc, char *argv[])
  50 {
  51         int mode = 0;
  52         int opt;
  53         int option_index;
  54         int rv;
  55         int i;
  56
  57         int chunk = 0;
  58         long long size = -1;
  59         long long array_size = -1;
  60         int level = UnSet;
  61         int layout = UnSet;
  62         char *layout_str = NULL;
  63         int raiddisks = 0;
  64         int sparedisks = 0;
  65         struct mddev_ident ident;
  66         char *configfile = NULL;
  67         int devmode = 0;
  68         int write_behind = 0;
  69         int bitmap_fd = -1;
  70         char *bitmap_file = NULL;
  71         int bitmap_chunk = UnSet;
  72         struct mddev_dev *devlist = NULL;
  73         struct mddev_dev **devlistend = & devlist;
  74         struct mddev_dev *dv;
  75         int devs_found = 0;
  76         int assume_clean = 0;
  77         char *symlinks = NULL;
  78         int grow_continue = 0;
  79         /* autof indicates whether and how to create device node.
  80          * bottom 3 bits are style.  Rest (when shifted) are number of parts
  81          * 0  - unset
  82          * 1  - don't create (no)
  83          * 2  - if is_standard, then create (yes)
  84          * 3  - create as 'md' - reject is_standard mdp (md)
  85          * 4  - create as 'mdp' - reject is_standard md (mdp)
  86          * 5  - default to md if not is_standard (md in config file)
  87          * 6  - default to mdp if not is_standard (part, or mdp in config file)
  88          */
  89         struct context c = {
  90                 .require_homehost = 1,
  91         };
  92
  93         char sys_hostname[256];
  94         char *mailaddr = NULL;
  95         char *program = NULL;
  96         int increments = 20;
  97         int daemonise = 0;
  98         char *pidfile = NULL;
  99         int oneshot = 0;
 100         int spare_sharing = 1;
 101         struct supertype *ss = NULL;
 102         int writemostly = 0;
 103         char *shortopt = short_options;
 104         int dosyslog = 0;
 105         int rebuild_map = 0;
 106         char *remove_path = NULL;
 107         char *udev_filename = NULL;
 108
 109         int print_help = 0;
 110         FILE *outf;
 111
 112         int mdfd = -1;
 113
 114         srandom(time(0) ^ getpid());
 115
 116         ident.uuid_set=0;
 117         ident.level = UnSet;
 118         ident.raid_disks = UnSet;
 119         ident.super_minor= UnSet;
 120         ident.devices=0;
 121         ident.spare_group = NULL;
 122         ident.autof = 0;
 123         ident.st = NULL;
 124         ident.bitmap_fd = -1;
 125         ident.bitmap_file = NULL;
 126         ident.name[0] = 0;
 127         ident.container = NULL;
 128         ident.member = NULL;
 129
 130         while ((option_index = -1) ,
 131                (opt=getopt_long(argc, argv,
 132                                 shortopt, long_options,
 133                                 &option_index)) != -1) {
 134                 int newmode = mode;
 135                 /* firstly, some mode-independent options */
 136                 switch(opt) {
 137                 case HelpOptions:
 138                         print_help = 2;
 139                         continue;
 140                 case 'h':
 141                         print_help = 1;
 142                         continue;
 143
 144                 case 'V':
 145                         fputs(Version, stderr);
 146                         exit(0);
 147
 148                 case 'v': c.verbose++;
 149                         continue;
 150
 151                 case 'q': c.quiet++;
 152                         continue;
 153
 154                 case 'b':
 155                         if (mode == ASSEMBLE || mode == BUILD || mode == CREATE
 156                             || mode == GROW || mode == INCREMENTAL
 157                             || mode == MANAGE)
 158                                 break; /* b means bitmap */
 159                 case Brief:
 160                         c.brief = 1;
 161                         continue;
 162
 163                 case 'Y': c.export++;
 164                         continue;
 165
 166                 case HomeHost:
 167                         if (strcasecmp(optarg, "<ignore>") == 0)
 168                                 c.require_homehost = 0;
 169                         else
 170                                 c.homehost = optarg;
 171                         continue;
 172
 173                 /*
 174                  * --offroot sets first char of argv[0] to @. This is used
 175                  * by systemd to signal that the task was launched from
 176                  * initrd/initramfs and should be preserved during shutdown
 177                  */
 178                 case OffRootOpt:
 179                         argv[0][0] = '@';
 180                         __offroot = 1;
 181                         continue;
 182
 183                 case Prefer:
 184                         if (c.prefer)
 185                                 free(c.prefer);
 186                         if (asprintf(&c.prefer, "/%s/", optarg) <= 0)
 187                                 c.prefer = NULL;
 188                         continue;
 189
 190                 case ':':
 191                 case '?':
 192                         fputs(Usage, stderr);
 193                         exit(2);
 194                 }
 195                 /* second, figure out the mode.
 196                  * Some options force the mode.  Others
 197                  * set the mode if it isn't already
 198                  */
 199
 200                 switch(opt) {
 201                 case ManageOpt:
 202                         newmode = MANAGE;
 203                         shortopt = short_bitmap_options;
 204                         break;
 205                 case 'a':
 206                 case Add:
 207                 case 'r':
 208                 case Remove:
 209                 case 'f':
 210                 case Fail:
 211                 case ReAdd: /* re-add */
 212                         if (!mode) {
 213                                 newmode = MANAGE;
 214                                 shortopt = short_bitmap_options;
 215                         }
 216                         break;
 217
 218                 case 'A': newmode = ASSEMBLE;
 219                         shortopt = short_bitmap_auto_options;
 220                         break;
 221                 case 'B': newmode = BUILD;
 222                         shortopt = short_bitmap_auto_options;
 223                         break;
 224                 case 'C': newmode = CREATE;
 225                         shortopt = short_bitmap_auto_options;
 226                         break;
 227                 case 'F': newmode = MONITOR;
 228                         break;
 229                 case 'G': newmode = GROW;
 230                         shortopt = short_bitmap_options;
 231                         break;
 232                 case 'I': newmode = INCREMENTAL;
 233                         shortopt = short_bitmap_auto_options;
 234                         break;
 235                 case AutoDetect:
 236                         newmode = AUTODETECT;
 237                         break;
 238
 239                 case MiscOpt:
 240                 case 'D':
 241                 case 'E':
 242                 case 'X':
 243                 case 'Q':
 244                         newmode = MISC;
 245                         break;
 246
 247                 case 'R':
 248                 case 'S':
 249                 case 'o':
 250                 case 'w':
 251                 case 'W':
 252                 case WaitOpt:
 253                 case Waitclean:
 254                 case DetailPlatform:
 255                 case KillSubarray:
 256                 case UpdateSubarray:
 257                 case UdevRules:
 258                 case KillOpt:
 259                         if (!mode)
 260                                 newmode = MISC;
 261                         break;
 262
 263                 case NoSharing:
 264                         newmode = MONITOR;
 265                         break;
 266                 }
 267                 if (mode && newmode == mode) {
 268                         /* everybody happy ! */
 269                 } else if (mode && newmode != mode) {
 270                         /* not allowed.. */
 271                         pr_err("");
 272                         if (option_index >= 0)
 273                                 fprintf(stderr, "--%s", long_options[option_index].name);
 274                         else
 275                                 fprintf(stderr, "-%c", opt);
 276                         fprintf(stderr, " would set mdadm mode to \"%s\", but it is already set to \"%s\".\n",
 277                                 map_num(modes, newmode),
 278                                 map_num(modes, mode));
 279                         exit(2);
 280                 } else if (!mode && newmode) {
 281                         mode = newmode;
 282                         if (mode == MISC && devs_found) {
 283                                 pr_err("No action given for %s in --misc mode\n",
 284                                         devlist->devname);
 285                                 fprintf(stderr,"       Action options must come before device names\n");
 286                                 exit(2);
 287                         }
 288                 } else {
 289                         /* special case of -c --help */
 290                         if ((opt == 'c' || opt == ConfigFile) &&
 291                             ( strncmp(optarg, "--h", 3)==0 ||
 292                               strncmp(optarg, "-h", 2)==0)) {
 293                                 fputs(Help_config, stdout);
 294                                 exit(0);
 295                         }
 296
 297                         /* If first option is a device, don't force the mode yet */
 298                         if (opt == 1) {
 299                                 if (devs_found == 0) {
 300                                         dv = xmalloc(sizeof(*dv));
 301                                         dv->devname = optarg;
 302                                         dv->disposition = devmode;
 303                                         dv->writemostly = writemostly;
 304                                         dv->used = 0;
 305                                         dv->next = NULL;
 306                                         *devlistend = dv;
 307                                         devlistend = &dv->next;
 308
 309                                         devs_found++;
 310                                         continue;
 311                                 }
 312                                 /* No mode yet, and this is the second device ... */
 313                                 pr_err("An option must be given to set the mode before a second device\n"
 314                                         "       (%s) is listed\n", optarg);
 315                                 exit(2);
 316                         }
 317                         if (option_index >= 0)
 318                                 pr_err("--%s", long_options[option_index].name);
 319                         else
 320                                 pr_err("-%c", opt);
 321                         fprintf(stderr, " does not set the mode, and so cannot be the first option.\n");
 322                         exit(2);
 323                 }
 324
 325                 /* if we just set the mode, then done */
 326                 switch(opt) {
 327                 case ManageOpt:
 328                 case MiscOpt:
 329                 case 'A':
 330                 case 'B':
 331                 case 'C':
 332                 case 'F':
 333                 case 'G':
 334                 case 'I':
 335                 case AutoDetect:
 336                         continue;
 337                 }
 338                 if (opt == 1) {
 339                         /* an undecorated option - must be a device name.
 340                          */
 341                         if (devs_found > 0 && mode == MANAGE && !devmode) {
 342                                 pr_err("Must give one of -a/-r/-f"
 343                                         " for subsequent devices at %s\n", optarg);
 344                                 exit(2);
 345                         }
 346                         if (devs_found > 0 && mode == GROW && !devmode) {
 347                                 pr_err("Must give -a/--add for"
 348                                        " devices to add: %s\n", optarg);
 349                                 exit(2);
 350                         }
 351                         dv = xmalloc(sizeof(*dv));
 352                         dv->devname = optarg;
 353                         dv->disposition = devmode;
 354                         dv->writemostly = writemostly;
 355                         dv->used = 0;
 356                         dv->next = NULL;
 357                         *devlistend = dv;
 358                         devlistend = &dv->next;
 359
 360                         devs_found++;
 361                         continue;
 362                 }
 363
 364                 /* We've got a mode, and opt is now something else which
 365                  * could depend on the mode */
 366 #define O(a,b) ((a<<16)|b)
 367                 switch (O(mode,opt)) {
 368                 case O(GROW,'c'):
 369                 case O(GROW,ChunkSize):
 370                 case O(CREATE,'c'):
 371                 case O(CREATE,ChunkSize):
 372                 case O(BUILD,'c'): /* chunk or rounding */
 373                 case O(BUILD,ChunkSize): /* chunk or rounding */
 374                         if (chunk) {
 375                                 pr_err("chunk/rounding may only be specified once. "
 376                                         "Second value is %s.\n", optarg);
 377                                 exit(2);
 378                         }
 379                         chunk = parse_size(optarg);
 380                         if (chunk < 8 || (chunk&1)) {
 381                                 pr_err("invalid chunk/rounding value: %s\n",
 382                                         optarg);
 383                                 exit(2);
 384                         }
 385                         /* Convert sectors to K */
 386                         chunk /= 2;
 387                         continue;
 388
 389                 case O(INCREMENTAL, 'e'):
 390                 case O(CREATE,'e'):
 391                 case O(ASSEMBLE,'e'):
 392                 case O(MISC,'e'): /* set metadata (superblock) information */
 393                         if (ss) {
 394                                 pr_err("metadata information already given\n");
 395                                 exit(2);
 396                         }
 397                         for(i=0; !ss && superlist[i]; i++)
 398                                 ss = superlist[i]->match_metadata_desc(optarg);
 399
 400                         if (!ss) {
 401                                 pr_err("unrecognised metadata identifier: %s\n", optarg);
 402                                 exit(2);
 403                         }
 404                         continue;
 405
 406                 case O(MANAGE,'W'):
 407                 case O(MANAGE,WriteMostly):
 408                 case O(BUILD,'W'):
 409                 case O(BUILD,WriteMostly):
 410                 case O(CREATE,'W'):
 411                 case O(CREATE,WriteMostly):
 412                         /* set write-mostly for following devices */
 413                         writemostly = 1;
 414                         continue;
 415
 416                 case O(MANAGE,'w'):
 417                         /* clear write-mostly for following devices */
 418                         writemostly = 2;
 419                         continue;
 420
 421
 422                 case O(GROW,'z'):
 423                 case O(CREATE,'z'):
 424                 case O(BUILD,'z'): /* size */
 425                         if (size >= 0) {
 426                                 pr_err("size may only be specified once. "
 427                                         "Second value is %s.\n", optarg);
 428                                 exit(2);
 429                         }
 430                         if (strcmp(optarg, "max")==0)
 431                                 size = 0;
 432                         else {
 433                                 size = parse_size(optarg);
 434                                 if (size < 8) {
 435                                         pr_err("invalid size: %s\n",
 436                                                 optarg);
 437                                         exit(2);
 438                                 }
 439                                 /* convert sectors to K */
 440                                 size /= 2;
 441                         }
 442                         continue;
 443
 444                 case O(GROW,'Z'): /* array size */
 445                         if (array_size >= 0) {
 446                                 pr_err("array-size may only be specified once. "
 447                                         "Second value is %s.\n", optarg);
 448                                 exit(2);
 449                         }
 450                         if (strcmp(optarg, "max") == 0)
 451                                 array_size = 0;
 452                         else {
 453                                 array_size = parse_size(optarg);
 454                                 if (array_size <= 0) {
 455                                         pr_err("invalid array size: %s\n",
 456                                                 optarg);
 457                                         exit(2);
 458                                 }
 459                         }
 460                         continue;
 461
 462                 case O(GROW,'l'):
 463                 case O(CREATE,'l'):
 464                 case O(BUILD,'l'): /* set raid level*/
 465                         if (level != UnSet) {
 466                                 pr_err("raid level may only be set once.  "
 467                                         "Second value is %s.\n", optarg);
 468                                 exit(2);
 469                         }
 470                         level = map_name(pers, optarg);
 471                         if (level == UnSet) {
 472                                 pr_err("invalid raid level: %s\n",
 473                                         optarg);
 474                                 exit(2);
 475                         }
 476                         if (level != 0 && level != LEVEL_LINEAR && level != 1 &&
 477                             level != LEVEL_MULTIPATH && level != LEVEL_FAULTY &&
 478                             level != 10 &&
 479                             mode == BUILD) {
 480                                 pr_err("Raid level %s not permitted with --build.\n",
 481                                         optarg);
 482                                 exit(2);
 483                         }
 484                         if (sparedisks > 0 && level < 1 && level >= -1) {
 485                                 pr_err("raid level %s is incompatible with spare-devices setting.\n",
 486                                         optarg);
 487                                 exit(2);
 488                         }
 489                         ident.level = level;
 490                         continue;
 491
 492                 case O(GROW, 'p'): /* new layout */
 493                 case O(GROW, Layout):
 494                         if (layout_str) {
 495                                 pr_err("layout may only be sent once.  "
 496                                        "Second value was %s\n", optarg);
 497                                 exit(2);
 498                         }
 499                         layout_str = optarg;
 500                         /* 'Grow' will parse the value */
 501                         continue;
 502
 503                 case O(CREATE,'p'): /* raid5 layout */
 504                 case O(CREATE,Layout):
 505                 case O(BUILD,'p'): /* faulty layout */
 506                 case O(BUILD,Layout):
 507                         if (layout != UnSet) {
 508                                 pr_err("layout may only be sent once.  "
 509                                        "Second value was %s\n", optarg);
 510                                 exit(2);
 511                         }
 512                         switch(level) {
 513                         default:
 514                                 pr_err("layout not meaningful for %s arrays.\n",
 515                                         map_num(pers, level));
 516                                 exit(2);
 517                         case UnSet:
 518                                 pr_err("raid level must be given before layout.\n");
 519                                 exit(2);
 520
 521                         case 5:
 522                                 layout = map_name(r5layout, optarg);
 523                                 if (layout==UnSet) {
 524                                         pr_err("layout %s not understood for raid5.\n",
 525                                                 optarg);
 526                                         exit(2);
 527                                 }
 528                                 break;
 529                         case 6:
 530                                 layout = map_name(r6layout, optarg);
 531                                 if (layout==UnSet) {
 532                                         pr_err("layout %s not understood for raid6.\n",
 533                                                 optarg);
 534                                         exit(2);
 535                                 }
 536                                 break;
 537
 538                         case 10:
 539                                 layout = parse_layout_10(optarg);
 540                                 if (layout < 0) {
 541                                         pr_err("layout for raid10 must be 'nNN', 'oNN' or 'fNN' where NN is a number, not %s\n", optarg);
 542                                         exit(2);
 543                                 }
 544                                 break;
 545                         case LEVEL_FAULTY:
 546                                 /* Faulty
 547                                  * modeNNN
 548                                  */
 549                                 layout = parse_layout_faulty(optarg);
 550                                 if (layout == -1) {
 551                                         pr_err("layout %s not understood for faulty.\n",
 552                                                 optarg);
 553                                         exit(2);
 554                                 }
 555                                 break;
 556                         }
 557                         continue;
 558
 559                 case O(CREATE,AssumeClean):
 560                 case O(BUILD,AssumeClean): /* assume clean */
 561                 case O(GROW,AssumeClean):
 562                         assume_clean = 1;
 563                         continue;
 564
 565                 case O(GROW,'n'):
 566                 case O(CREATE,'n'):
 567                 case O(BUILD,'n'): /* number of raid disks */
 568                         if (raiddisks) {
 569                                 pr_err("raid-devices set twice: %d and %s\n",
 570                                         raiddisks, optarg);
 571                                 exit(2);
 572                         }
 573                         raiddisks = parse_num(optarg);
 574                         if (raiddisks <= 0) {
 575                                 pr_err("invalid number of raid devices: %s\n",
 576                                         optarg);
 577                                 exit(2);
 578                         }
 579                         ident.raid_disks = raiddisks;
 580                         continue;
 581
 582                 case O(CREATE,'x'): /* number of spare (eXtra) disks */
 583                         if (sparedisks) {
 584                                 pr_err("spare-devices set twice: %d and %s\n",
 585                                        sparedisks, optarg);
 586                                 exit(2);
 587                         }
 588                         if (level != UnSet && level <= 0 && level >= -1) {
 589                                 pr_err("spare-devices setting is incompatible with raid level %d\n",
 590                                         level);
 591                                 exit(2);
 592                         }
 593                         sparedisks = parse_num(optarg);
 594                         if (sparedisks < 0) {
 595                                 pr_err("invalid number of spare-devices: %s\n",
 596                                         optarg);
 597                                 exit(2);
 598                         }
 599                         continue;
 600
 601                 case O(CREATE,'a'):
 602                 case O(CREATE,Auto):
 603                 case O(BUILD,'a'):
 604                 case O(BUILD,Auto):
 605                 case O(INCREMENTAL,'a'):
 606                 case O(INCREMENTAL,Auto):
 607                 case O(ASSEMBLE,'a'):
 608                 case O(ASSEMBLE,Auto): /* auto-creation of device node */
 609                         c.autof = parse_auto(optarg, "--auto flag", 0);
 610                         continue;
 611
 612                 case O(CREATE,Symlinks):
 613                 case O(BUILD,Symlinks):
 614                 case O(ASSEMBLE,Symlinks): /* auto creation of symlinks in /dev to /dev/md */
 615                         symlinks = optarg;
 616                         continue;
 617
 618                 case O(BUILD,'f'): /* force honouring '-n 1' */
 619                 case O(BUILD,Force): /* force honouring '-n 1' */
 620                 case O(GROW,'f'): /* ditto */
 621                 case O(GROW,Force): /* ditto */
 622                 case O(CREATE,'f'): /* force honouring of device list */
 623                 case O(CREATE,Force): /* force honouring of device list */
 624                 case O(ASSEMBLE,'f'): /* force assembly */
 625                 case O(ASSEMBLE,Force): /* force assembly */
 626                 case O(MISC,'f'): /* force zero */
 627                 case O(MISC,Force): /* force zero */
 628                 case O(MANAGE,Force): /* add device which is too large */
 629                         c.force=1;
 630                         continue;
 631                         /* now for the Assemble options */
 632                 case O(ASSEMBLE, FreezeReshape):   /* Freeze reshape during
 633                                                     * initrd phase */
 634                 case O(INCREMENTAL, FreezeReshape):
 635                         c.freeze_reshape = 1;
 636                         continue;
 637                 case O(CREATE,'u'): /* uuid of array */
 638                 case O(ASSEMBLE,'u'): /* uuid of array */
 639                         if (ident.uuid_set) {
 640                                 pr_err("uuid cannot be set twice.  "
 641                                         "Second value %s.\n", optarg);
 642                                 exit(2);
 643                         }
 644                         if (parse_uuid(optarg, ident.uuid))
 645                                 ident.uuid_set = 1;
 646                         else {
 647                                 pr_err("Bad uuid: %s\n", optarg);
 648                                 exit(2);
 649                         }
 650                         continue;
 651
 652                 case O(CREATE,'N'):
 653                 case O(ASSEMBLE,'N'):
 654                 case O(MISC,'N'):
 655                         if (ident.name[0]) {
 656                                 pr_err("name cannot be set twice.   "
 657                                         "Second value %s.\n", optarg);
 658                                 exit(2);
 659                         }
 660                         if (mode == MISC && !c.subarray) {
 661                                 pr_err("-N/--name only valid with --update-subarray in misc mode\n");
 662                                 exit(2);
 663                         }
 664                         if (strlen(optarg) > 32) {
 665                                 pr_err("name '%s' is too long, 32 chars max.\n",
 666                                         optarg);
 667                                 exit(2);
 668                         }
 669                         strcpy(ident.name, optarg);
 670                         continue;
 671
 672                 case O(ASSEMBLE,'m'): /* super-minor for array */
 673                 case O(ASSEMBLE,SuperMinor):
 674                         if (ident.super_minor != UnSet) {
 675                                 pr_err("super-minor cannot be set twice.  "
 676                                         "Second value: %s.\n", optarg);
 677                                 exit(2);
 678                         }
 679                         if (strcmp(optarg, "dev")==0)
 680                                 ident.super_minor = -2;
 681                         else {
 682                                 ident.super_minor = parse_num(optarg);
 683                                 if (ident.super_minor < 0) {
 684                                         pr_err("Bad super-minor number: %s.\n", optarg);
 685                                         exit(2);
 686                                 }
 687                         }
 688                         continue;
 689
 690                 case O(ASSEMBLE,'o'):
 691                 case O(MANAGE,'o'):
 692                 case O(CREATE,'o'):
 693                         c.readonly = 1;
 694                         continue;
 695
 696                 case O(ASSEMBLE,'U'): /* update the superblock */
 697                 case O(MISC,'U'):
 698                         if (c.update) {
 699                                 pr_err("Can only update one aspect"
 700                                         " of superblock, both %s and %s given.\n",
 701                                         c.update, optarg);
 702                                 exit(2);
 703                         }
 704                         if (mode == MISC && !c.subarray) {
 705                                 pr_err("Only subarrays can be"
 706                                         " updated in misc mode\n");
 707                                 exit(2);
 708                         }
 709                         c.update = optarg;
 710                         if (strcmp(c.update, "sparc2.2")==0)
 711                                 continue;
 712                         if (strcmp(c.update, "super-minor") == 0)
 713                                 continue;
 714                         if (strcmp(c.update, "summaries")==0)
 715                                 continue;
 716                         if (strcmp(c.update, "resync")==0)
 717                                 continue;
 718                         if (strcmp(c.update, "uuid")==0)
 719                                 continue;
 720                         if (strcmp(c.update, "name")==0)
 721                                 continue;
 722                         if (strcmp(c.update, "homehost")==0)
 723                                 continue;
 724                         if (strcmp(c.update, "devicesize")==0)
 725                                 continue;
 726                         if (strcmp(c.update, "no-bitmap")==0)
 727                                 continue;
 728                         if (strcmp(c.update, "byteorder")==0) {
 729                                 if (ss) {
 730                                         pr_err("must not set metadata"
 731                                                " type with --update=byteorder.\n");
 732                                         exit(2);
 733                                 }
 734                                 for(i=0; !ss && superlist[i]; i++)
 735                                         ss = superlist[i]->match_metadata_desc(
 736                                                 "0.swap");
 737                                 if (!ss) {
 738                                         pr_err("INTERNAL ERROR"
 739                                                 " cannot find 0.swap\n");
 740                                         exit(2);
 741                                 }
 742
 743                                 continue;
 744                         }
 745                         if (strcmp(c.update,"?") == 0 ||
 746                             strcmp(c.update, "help") == 0) {
 747                                 outf = stdout;
 748                                 fprintf(outf, Name ": ");
 749                         } else {
 750                                 outf = stderr;
 751                                 fprintf(outf,
 752                                         Name ": '--update=%s' is invalid.  ",
 753                                         c.update);
 754                         }
 755                         fprintf(outf, "Valid --update options are:\n"
 756                 "     'sparc2.2', 'super-minor', 'uuid', 'name', 'resync',\n"
 757                 "     'summaries', 'homehost', 'byteorder', 'devicesize',\n"
 758                 "     'no-bitmap'\n");
 759                         exit(outf == stdout ? 0 : 2);
 760
 761                 case O(MANAGE,'U'):
 762                         /* update=devicesize is allowed with --re-add */
 763                         if (devmode != 'A') {
 764                                 pr_err("--update in Manage mode only"
 765                                         " allowed with --re-add.\n");
 766                                 exit(1);
 767                         }
 768                         if (c.update) {
 769                                 pr_err("Can only update one aspect"
 770                                         " of superblock, both %s and %s given.\n",
 771                                         c.update, optarg);
 772                                 exit(2);
 773                         }
 774                         c.update = optarg;
 775                         if (strcmp(c.update, "devicesize") != 0) {
 776                                 pr_err("only 'devicesize' can be"
 777                                         " updated with --re-add\n");
 778                                 exit(2);
 779                         }
 780                         continue;
 781
 782                 case O(INCREMENTAL,NoDegraded):
 783                         pr_err("--no-degraded is deprecated in Incremental mode\n");
 784                 case O(ASSEMBLE,NoDegraded): /* --no-degraded */
 785                         c.runstop = -1; /* --stop isn't allowed for --assemble,
 786                                          * so we overload slightly */
 787                         continue;
 788
 789                 case O(ASSEMBLE,'c'):
 790                 case O(ASSEMBLE,ConfigFile):
 791                 case O(INCREMENTAL, 'c'):
 792                 case O(INCREMENTAL, ConfigFile):
 793                 case O(MISC, 'c'):
 794                 case O(MISC, ConfigFile):
 795                 case O(MONITOR,'c'):
 796                 case O(MONITOR,ConfigFile):
 797                         if (configfile) {
 798                                 pr_err("configfile cannot be set twice.  "
 799                                         "Second value is %s.\n", optarg);
 800                                 exit(2);
 801                         }
 802                         configfile = optarg;
 803                         set_conffile(configfile);
 804                         /* FIXME possibly check that config file exists.  Even parse it */
 805                         continue;
 806                 case O(ASSEMBLE,'s'): /* scan */
 807                 case O(MISC,'s'):
 808                 case O(MONITOR,'s'):
 809                 case O(INCREMENTAL,'s'):
 810                         c.scan = 1;
 811                         continue;
 812
 813                 case O(MONITOR,'m'): /* mail address */
 814                 case O(MONITOR,EMail):
 815                         if (mailaddr)
 816                                 pr_err("only specify one mailaddress. %s ignored.\n",
 817                                         optarg);
 818                         else
 819                                 mailaddr = optarg;
 820                         continue;
 821
 822                 case O(MONITOR,'p'): /* alert program */
 823                 case O(MONITOR,ProgramOpt): /* alert program */
 824                         if (program)
 825                                 pr_err("only specify one alter program. %s ignored.\n",
 826                                         optarg);
 827                         else
 828                                 program = optarg;
 829                         continue;
 830
 831                 case O(MONITOR,'r'): /* rebuild increments */
 832                 case O(MONITOR,Increment):
 833                         increments = atoi(optarg);
 834                         if (increments > 99 || increments < 1) {
 835                                 pr_err("please specify positive integer between 1 and 99 as rebuild increments.\n");
 836                                 exit(2);
 837                         }
 838                         continue;
 839
 840                 case O(MONITOR,'d'): /* delay in seconds */
 841                 case O(GROW, 'd'):
 842                 case O(BUILD,'d'): /* delay for bitmap updates */
 843                 case O(CREATE,'d'):
 844                         if (c.delay)
 845                                 pr_err("only specify delay once. %s ignored.\n",
 846                                         optarg);
 847                         else {
 848                                 c.delay = parse_num(optarg);
 849                                 if (c.delay < 1) {
 850                                         pr_err("invalid delay: %s\n",
 851                                                 optarg);
 852                                         exit(2);
 853                                 }
 854                         }
 855                         continue;
 856                 case O(MONITOR,'f'): /* daemonise */
 857                 case O(MONITOR,Fork):
 858                         daemonise = 1;
 859                         continue;
 860                 case O(MONITOR,'i'): /* pid */
 861                         if (pidfile)
 862                                 pr_err("only specify one pid file. %s ignored.\n",
 863                                         optarg);
 864                         else
 865                                 pidfile = optarg;
 866                         continue;
 867                 case O(MONITOR,'1'): /* oneshot */
 868                         oneshot = 1;
 869                         spare_sharing = 0;
 870                         continue;
 871                 case O(MONITOR,'t'): /* test */
 872                         c.test = 1;
 873                         continue;
 874                 case O(MONITOR,'y'): /* log messages to syslog */
 875                         openlog("mdadm", LOG_PID, SYSLOG_FACILITY);
 876                         dosyslog = 1;
 877                         continue;
 878                 case O(MONITOR, NoSharing):
 879                         spare_sharing = 0;
 880                         continue;
 881
 882                         /* now the general management options.  Some are applicable
 883                          * to other modes. None have arguments.
 884                          */
 885                 case O(GROW,'a'):
 886                 case O(GROW,Add):
 887                 case O(MANAGE,'a'):
 888                 case O(MANAGE,Add): /* add a drive */
 889                         devmode = 'a';
 890                         continue;
 891                 case O(MANAGE,ReAdd):
 892                         devmode = 'A';
 893                         continue;
 894                 case O(MANAGE,'r'): /* remove a drive */
 895                 case O(MANAGE,Remove):
 896                         devmode = 'r';
 897                         continue;
 898                 case O(MANAGE,'f'): /* set faulty */
 899                 case O(MANAGE,Fail):
 900                 case O(INCREMENTAL,'f'):
 901                 case O(INCREMENTAL,Remove):
 902                 case O(INCREMENTAL,Fail): /* r for incremental is taken, use f
 903                                            * even though we will both fail and
 904                                            * remove the device */
 905                         devmode = 'f';
 906                         continue;
 907                 case O(INCREMENTAL,'R'):
 908                 case O(MANAGE,'R'):
 909                 case O(ASSEMBLE,'R'):
 910                 case O(BUILD,'R'):
 911                 case O(CREATE,'R'): /* Run the array */
 912                         if (c.runstop < 0) {
 913                                 pr_err("Cannot both Stop and Run an array\n");
 914                                 exit(2);
 915                         }
 916                         c.runstop = 1;
 917                         continue;
 918                 case O(MANAGE,'S'):
 919                         if (c.runstop > 0) {
 920                                 pr_err("Cannot both Run and Stop an array\n");
 921                                 exit(2);
 922                         }
 923                         c.runstop = -1;
 924                         continue;
 925                 case O(MANAGE,'t'):
 926                         c.test = 1;
 927                         continue;
 928
 929                 case O(MISC,'Q'):
 930                 case O(MISC,'D'):
 931                 case O(MISC,'E'):
 932                 case O(MISC,KillOpt):
 933                 case O(MISC,'R'):
 934                 case O(MISC,'S'):
 935                 case O(MISC,'X'):
 936                 case O(MISC,'o'):
 937                 case O(MISC,'w'):
 938                 case O(MISC,'W'):
 939                 case O(MISC, WaitOpt):
 940                 case O(MISC, Waitclean):
 941                 case O(MISC, DetailPlatform):
 942                 case O(MISC, KillSubarray):
 943                 case O(MISC, UpdateSubarray):
 944                         if (opt == KillSubarray || opt == UpdateSubarray) {
 945                                 if (c.subarray) {
 946                                         pr_err("subarray can only"
 947                                                 " be specified once\n");
 948                                         exit(2);
 949                                 }
 950                                 c.subarray = optarg;
 951                         }
 952                         if (devmode && devmode != opt &&
 953                             (devmode == 'E' || (opt == 'E' && devmode != 'Q'))) {
 954                                 pr_err("--examine/-E cannot be given with ");
 955                                 if (devmode == 'E') {
 956                                         if (option_index >= 0)
 957                                                 fprintf(stderr, "--%s\n",
 958                                                         long_options[option_index].name);
 959                                         else
 960                                                 fprintf(stderr, "-%c\n", opt);
 961                                 } else if (isalpha(devmode))
 962                                         fprintf(stderr, "-%c\n", devmode);
 963                                 else
 964                                         fprintf(stderr, "previous option\n");
 965                                 exit(2);
 966                         }
 967                         devmode = opt;
 968                         continue;
 969                 case O(MISC, UdevRules):
 970                         if (devmode && devmode != opt) {
 971                                 pr_err("--udev-rules must"
 972                                        " be the only option.\n");
 973                         } else {
 974                                 if (udev_filename)
 975                                         pr_err("only specify one udev "
 976                                                 "rule filename. %s ignored.\n",
 977                                                 optarg);
 978                                 else
 979                                         udev_filename = optarg;
 980                         }
 981                         devmode = opt;
 982                         continue;
 983                 case O(MISC,'t'):
 984                         c.test = 1;
 985                         continue;
 986
 987                 case O(MISC, Sparc22):
 988                         if (devmode != 'E') {
 989                                 pr_err("--sparc2.2 only allowed with --examine\n");
 990                                 exit(2);
 991                         }
 992                         c.SparcAdjust = 1;
 993                         continue;
 994
 995                 case O(ASSEMBLE,'b'): /* here we simply set the bitmap file */
 996                 case O(ASSEMBLE,Bitmap):
 997                         if (!optarg) {
 998                                 pr_err("bitmap file needed with -b in --assemble mode\n");
 999                                 exit(2);
1000                         }
1001                         if (strcmp(optarg, "internal")==0) {
1002                                 pr_err("there is no need to specify --bitmap when assembling arrays with internal bitmaps\n");
1003                                 continue;
1004                         }
1005                         bitmap_fd = open(optarg, O_RDWR);
1006                         if (!*optarg || bitmap_fd < 0) {
1007                                 pr_err("cannot open bitmap file %s: %s\n", optarg, strerror(errno));
1008                                 exit(2);
1009                         }
1010                         ident.bitmap_fd = bitmap_fd; /* for Assemble */
1011                         continue;
1012
1013                 case O(ASSEMBLE, BackupFile):
1014                 case O(GROW, BackupFile):
1015                         /* Specify a file into which grow might place a backup,
1016                          * or from which assemble might recover a backup
1017                          */
1018                         if (c.backup_file) {
1019                                 pr_err("backup file already specified, rejecting %s\n", optarg);
1020                                 exit(2);
1021                         }
1022                         c.backup_file = optarg;
1023                         continue;
1024
1025                 case O(GROW, Continue):
1026                         /* Continue interrupted grow
1027                          */
1028                         grow_continue = 1;
1029                         continue;
1030                 case O(ASSEMBLE, InvalidBackup):
1031                         /* Acknowledge that the backupfile is invalid, but ask
1032                          * to continue anyway
1033                          */
1034                         c.invalid_backup = 1;
1035                         continue;
1036
1037                 case O(BUILD,'b'):
1038                 case O(BUILD,Bitmap):
1039                 case O(CREATE,'b'):
1040                 case O(CREATE,Bitmap): /* here we create the bitmap */
1041                         if (strcmp(optarg, "none") == 0) {
1042                                 pr_err("'--bitmap none' only"
1043                                         " supported for --grow\n");
1044                                 exit(2);
1045                         }
1046                         /* FALL THROUGH */
1047                 case O(GROW,'b'):
1048                 case O(GROW,Bitmap):
1049                         if (strcmp(optarg, "internal")== 0 ||
1050                             strcmp(optarg, "none")== 0 ||
1051                             strchr(optarg, '/') != NULL) {
1052                                 bitmap_file = optarg;
1053                                 continue;
1054                         }
1055                         /* probable typo */
1056                         pr_err("bitmap file must contain a '/', or be 'internal', or 'none'\n"
1057                                 "       not '%s'\n", optarg);
1058                         exit(2);
1059
1060                 case O(GROW,BitmapChunk):
1061                 case O(BUILD,BitmapChunk):
1062                 case O(CREATE,BitmapChunk): /* bitmap chunksize */
1063                         bitmap_chunk = parse_size(optarg);
1064                         if (bitmap_chunk <= 0 ||
1065                             bitmap_chunk & (bitmap_chunk - 1)) {
1066                                 pr_err("invalid bitmap chunksize: %s\n",
1067                                        optarg);
1068                                 exit(2);
1069                         }
1070                         bitmap_chunk = bitmap_chunk * 512;
1071                         continue;
1072
1073                 case O(GROW, WriteBehind):
1074                 case O(BUILD, WriteBehind):
1075                 case O(CREATE, WriteBehind): /* write-behind mode */
1076                         write_behind = DEFAULT_MAX_WRITE_BEHIND;
1077                         if (optarg) {
1078                                 write_behind = parse_num(optarg);
1079                                 if (write_behind < 0 ||
1080                                     write_behind > 16383) {
1081                                         pr_err("Invalid value for maximum outstanding write-behind writes: %s.\n\tMust be between 0 and 16383.\n", optarg);
1082                                         exit(2);
1083                                 }
1084                         }
1085                         continue;
1086
1087                 case O(INCREMENTAL, 'r'):
1088                 case O(INCREMENTAL, RebuildMapOpt):
1089                         rebuild_map = 1;
1090                         continue;
1091                 case O(INCREMENTAL, IncrementalPath):
1092                         remove_path = optarg;
1093                         continue;
1094                 }
1095                 /* We have now processed all the valid options. Anything else is
1096                  * an error
1097                  */
1098                 if (option_index > 0)
1099                         pr_err(":option --%s not valid in %s mode\n",
1100                                 long_options[option_index].name,
1101                                 map_num(modes, mode));
1102                 else
1103                         pr_err("option -%c not valid in %s mode\n",
1104                                 opt, map_num(modes, mode));
1105                 exit(2);
1106
1107         }
1108
1109         if (print_help) {
1110                 char *help_text;
1111                 if (print_help == 2)
1112                         help_text = OptionHelp;
1113                 else
1114                         help_text = mode_help[mode];
1115                 if (help_text == NULL)
1116                         help_text = Help;
1117                 fputs(help_text,stdout);
1118                 exit(0);
1119         }
1120
1121         if (!mode && devs_found) {
1122                 mode = MISC;
1123                 devmode = 'Q';
1124                 if (devlist->disposition == 0)
1125                         devlist->disposition = devmode;
1126         }
1127         if (!mode) {
1128                 fputs(Usage, stderr);
1129                 exit(2);
1130         }
1131
1132         if (symlinks) {
1133                 struct createinfo *ci = conf_get_create_info();
1134
1135                 if (strcasecmp(symlinks, "yes") == 0)
1136                         ci->symlinks = 1;
1137                 else if (strcasecmp(symlinks, "no") == 0)
1138                         ci->symlinks = 0;
1139                 else {
1140                         pr_err("option --symlinks must be 'no' or 'yes'\n");
1141                         exit(2);
1142                 }
1143         }
1144         /* Ok, got the option parsing out of the way
1145          * hopefully it's mostly right but there might be some stuff
1146          * missing
1147          *
1148          * That is mosty checked in the per-mode stuff but...
1149          *
1150          * For @,B,C and A without -s, the first device listed must be
1151          * an md device.  We check that here and open it.
1152          */
1153
1154         if (mode == MANAGE || mode == BUILD || mode == CREATE
1155             || mode == GROW
1156             || (mode == ASSEMBLE && ! c.scan)) {
1157                 if (devs_found < 1) {
1158                         pr_err("an md device must be given in this mode\n");
1159                         exit(2);
1160                 }
1161                 if ((int)ident.super_minor == -2 && c.autof) {
1162                         pr_err("--super-minor=dev is incompatible with --auto\n");
1163                         exit(2);
1164                 }
1165                 if (mode == MANAGE || mode == GROW) {
1166                         mdfd = open_mddev(devlist->devname, 1);
1167                         if (mdfd < 0)
1168                                 exit(1);
1169                 } else
1170                         /* non-existent device is OK */
1171                         mdfd = open_mddev(devlist->devname, 0);
1172                 if (mdfd == -2) {
1173                         pr_err("device %s exists but is not an "
1174                                 "md array.\n", devlist->devname);
1175                         exit(1);
1176                 }
1177                 if ((int)ident.super_minor == -2) {
1178                         struct stat stb;
1179                         if (mdfd < 0) {
1180                                 pr_err("--super-minor=dev given, and "
1181                                         "listed device %s doesn't exist.\n",
1182                                         devlist->devname);
1183                                 exit(1);
1184                         }
1185                         fstat(mdfd, &stb);
1186                         ident.super_minor = minor(stb.st_rdev);
1187                 }
1188                 if (mdfd >= 0 && mode != MANAGE && mode != GROW) {
1189                         /* We don't really want this open yet, we just might
1190                          * have wanted to check some things
1191                          */
1192                         close(mdfd);
1193                         mdfd = -1;
1194                 }
1195         }
1196
1197         if (raiddisks) {
1198                 if (raiddisks == 1 &&  !c.force && level != LEVEL_FAULTY) {
1199                         pr_err("'1' is an unusual number of drives for an array, so it is probably\n"
1200                                 "     a mistake.  If you really mean it you will need to specify --force before\n"
1201                                 "     setting the number of drives.\n");
1202                         exit(2);
1203                 }
1204         }
1205
1206         if (c.homehost == NULL)
1207                 c.homehost = conf_get_homehost(&c.require_homehost);
1208         if (c.homehost == NULL || strcasecmp(c.homehost, "<system>")==0) {
1209                 if (gethostname(sys_hostname, sizeof(sys_hostname)) == 0) {
1210                         sys_hostname[sizeof(sys_hostname)-1] = 0;
1211                         c.homehost = sys_hostname;
1212                 }
1213         }
1214         if (c.homehost && (!c.homehost[0] || strcasecmp(c.homehost, "<none>") == 0)) {
1215                 c.homehost = NULL;
1216                 c.require_homehost = 0;
1217         }
1218
1219         if ((mode == MISC && devmode == 'E')
1220             || (mode == MONITOR && spare_sharing == 0))
1221                 /* Anyone may try this */;
1222         else if (geteuid() != 0) {
1223                 pr_err("must be super-user to perform this action\n");
1224                 exit(1);
1225         }
1226
1227         ident.autof = c.autof;
1228
1229         rv = 0;
1230         switch(mode) {
1231         case MANAGE:
1232                 /* readonly, add/remove, readwrite, runstop */
1233                 if (c.readonly > 0)
1234                         rv = Manage_ro(devlist->devname, mdfd, c.readonly);
1235                 if (!rv && devs_found>1)
1236                         rv = Manage_subdevs(devlist->devname, mdfd,
1237                                             devlist->next, c.verbose-c.quiet, c.test,
1238                                             c.update, c.force);
1239                 if (!rv && c.readonly < 0)
1240                         rv = Manage_ro(devlist->devname, mdfd, c.readonly);
1241                 if (!rv && c.runstop)
1242                         rv = Manage_runstop(devlist->devname, mdfd, c.runstop, c.verbose-c.quiet, 0);
1243                 break;
1244         case ASSEMBLE:
1245                 if (devs_found == 1 && ident.uuid_set == 0 &&
1246                     ident.super_minor == UnSet && ident.name[0] == 0 && !c.scan ) {
1247                         /* Only a device has been given, so get details from config file */
1248                         struct mddev_ident *array_ident = conf_get_ident(devlist->devname);
1249                         if (array_ident == NULL) {
1250                                 pr_err("%s not identified in config file.\n",
1251                                         devlist->devname);
1252                                 rv |= 1;
1253                                 if (mdfd >= 0)
1254                                         close(mdfd);
1255                         } else {
1256                                 if (array_ident->autof == 0)
1257                                         array_ident->autof = c.autof;
1258                                 rv |= Assemble(ss, devlist->devname, array_ident,
1259                                                NULL, c.backup_file, c.invalid_backup,
1260                                                c.readonly, c.runstop, c.update,
1261                                                c.homehost, c.require_homehost,
1262                                                c.verbose-c.quiet, c.force,
1263                                                c.freeze_reshape);
1264                         }
1265                 } else if (!c.scan)
1266                         rv = Assemble(ss, devlist->devname, &ident,
1267                                       devlist->next, c.backup_file, c.invalid_backup,
1268                                       c.readonly, c.runstop, c.update,
1269                                       c.homehost, c.require_homehost,
1270                                       c.verbose-c.quiet, c.force,
1271                                       c.freeze_reshape);
1272                 else if (devs_found > 0) {
1273                         if (c.update && devs_found > 1) {
1274                                 pr_err("can only update a single array at a time\n");
1275                                 exit(1);
1276                         }
1277                         if (c.backup_file && devs_found > 1) {
1278                                 pr_err("can only assemble a single array when providing a backup file.\n");
1279                                 exit(1);
1280                         }
1281                         for (dv = devlist ; dv ; dv=dv->next) {
1282                                 struct mddev_ident *array_ident = conf_get_ident(dv->devname);
1283                                 if (array_ident == NULL) {
1284                                         pr_err("%s not identified in config file.\n",
1285                                                 dv->devname);
1286                                         rv |= 1;
1287                                         continue;
1288                                 }
1289                                 if (array_ident->autof == 0)
1290                                         array_ident->autof = c.autof;
1291                                 rv |= Assemble(ss, dv->devname, array_ident,
1292                                                NULL, c.backup_file, c.invalid_backup,
1293                                                c.readonly, c.runstop, c.update,
1294                                                c.homehost, c.require_homehost,
1295                                                c.verbose-c.quiet, c.force,
1296                                                c.freeze_reshape);
1297                         }
1298                 } else {
1299                         if (c.update) {
1300                                 pr_err("--update not meaningful with a --scan assembly.\n");
1301                                 exit(1);
1302                         }
1303                         if (c.backup_file) {
1304                                 pr_err("--backup_file not meaningful with a --scan assembly.\n");
1305                                 exit(1);
1306                         }
1307                         rv = scan_assemble(c.autof, ss, c.readonly, c.runstop,
1308                                            &ident, c.homehost,
1309                                            c.require_homehost,
1310                                            c.verbose - c.quiet,
1311                                            c.force, c.freeze_reshape);
1312                 }
1313
1314                 break;
1315         case BUILD:
1316                 if (c.delay == 0)
1317                         c.delay = DEFAULT_BITMAP_DELAY;
1318                 if (write_behind && !bitmap_file) {
1319                         pr_err("write-behind mode requires a bitmap.\n");
1320                         rv = 1;
1321                         break;
1322                 }
1323                 if (raiddisks == 0) {
1324                         pr_err("no raid-devices specified.\n");
1325                         rv = 1;
1326                         break;
1327                 }
1328
1329                 if (bitmap_file) {
1330                         if (strcmp(bitmap_file, "internal")==0) {
1331                                 pr_err("'internal' bitmaps not supported with --build\n");
1332                                 rv |= 1;
1333                                 break;
1334                         }
1335                 }
1336                 rv = Build(devlist->devname, chunk, level, layout,
1337                            raiddisks, devlist->next, assume_clean,
1338                            bitmap_file, bitmap_chunk, write_behind,
1339                            c.delay, c.verbose-c.quiet, c.autof, size);
1340                 break;
1341         case CREATE:
1342                 if (c.delay == 0)
1343                         c.delay = DEFAULT_BITMAP_DELAY;
1344                 if (write_behind && !bitmap_file) {
1345                         pr_err("write-behind mode requires a bitmap.\n");
1346                         rv = 1;
1347                         break;
1348                 }
1349                 if (raiddisks == 0) {
1350                         pr_err("no raid-devices specified.\n");
1351                         rv = 1;
1352                         break;
1353                 }
1354
1355                 rv = Create(ss, devlist->devname, chunk, level, layout, size<0 ? 0 : size,
1356                             raiddisks, sparedisks, ident.name, c.homehost,
1357                             ident.uuid_set ? ident.uuid : NULL,
1358                             devs_found-1, devlist->next, c.runstop,
1359                             c.readonly, c.verbose-c.quiet, c.force, assume_clean,
1360                             bitmap_file, bitmap_chunk, write_behind, c.delay, c.autof);
1361                 break;
1362         case MISC:
1363                 if (devmode == 'E') {
1364                         if (devlist == NULL && !c.scan) {
1365                                 pr_err("No devices to examine\n");
1366                                 exit(2);
1367                         }
1368                         if (devlist == NULL)
1369                                 devlist = conf_get_devs();
1370                         if (devlist == NULL) {
1371                                 pr_err("No devices listed in %s\n", configfile?configfile:DefaultConfFile);
1372                                 exit(1);
1373                         }
1374                         if (c.brief && c.verbose > 0)
1375                                 c.brief = 2;
1376                         rv = Examine(devlist, c.scan?(c.verbose>1?0:c.verbose):c.brief,
1377                                      c.export, c.scan,
1378                                      c.SparcAdjust, ss, c.homehost);
1379                 } else if (devmode == DetailPlatform) {
1380                         rv = Detail_Platform(ss ? ss->ss : NULL, ss ? c.scan : 1, c.verbose-c.quiet);
1381                 } else if (devlist == NULL) {
1382                         if (devmode == 'S' && c.scan)
1383                                 rv = stop_scan(c.verbose-c.quiet);
1384                         else if ((devmode == 'D' || devmode == Waitclean) && c.scan)
1385                                 rv = misc_scan(devmode, c.verbose-c.quiet, c.export,
1386                                                c.test, c.homehost, c.prefer);
1387                         else if (devmode == UdevRules)
1388                                 rv = Write_rules(udev_filename);
1389                         else {
1390                                 pr_err("No devices given.\n");
1391                                 exit(2);
1392                         }
1393                 } else
1394                         rv = misc_list(devlist, c.brief, c.verbose-c.quiet, c.export, c.test,
1395                                        c.homehost, c.prefer, c.subarray, c.update,
1396                                        &ident,
1397                                        ss, c.force);
1398                 break;
1399         case MONITOR:
1400                 if (!devlist && !c.scan) {
1401                         pr_err("Cannot monitor: need --scan or at least one device\n");
1402                         rv = 1;
1403                         break;
1404                 }
1405                 if (pidfile && !daemonise) {
1406                         pr_err("Cannot write a pid file when not in daemon mode\n");
1407                         rv = 1;
1408                         break;
1409                 }
1410                 if (c.delay == 0) {
1411                         if (get_linux_version() > 2006016)
1412                                 /* mdstat responds to poll */
1413                                 c.delay = 1000;
1414                         else
1415                                 c.delay = 60;
1416                 }
1417                 rv= Monitor(devlist, mailaddr, program,
1418                             c.delay?c.delay:60, daemonise, c.scan, oneshot,
1419                             dosyslog, c.test, pidfile, increments,
1420                             spare_sharing, c.prefer);
1421                 break;
1422
1423         case GROW:
1424                 if (array_size >= 0) {
1425                         /* alway impose array size first, independent of
1426                          * anything else
1427                          * Do not allow level or raid_disks changes at the
1428                          * same time as that can be irreversibly destructive.
1429                          */
1430                         struct mdinfo sra;
1431                         int err;
1432                         if (raiddisks || level != UnSet) {
1433                                 pr_err("cannot change array size in same operation "
1434                                         "as changing raiddisks or level.\n"
1435                                         "    Change size first, then check that data is still intact.\n");
1436                                 rv = 1;
1437                                 break;
1438                         }
1439                         sysfs_init(&sra, mdfd, 0);
1440                         if (array_size == 0)
1441                                 err = sysfs_set_str(&sra, NULL, "array_size", "default");
1442                         else
1443                                 err = sysfs_set_num(&sra, NULL, "array_size", array_size / 2);
1444                         if (err < 0) {
1445                                 if (errno == E2BIG)
1446                                         pr_err("--array-size setting"
1447                                                 " is too large.\n");
1448                                 else
1449                                         pr_err("current kernel does"
1450                                                 " not support setting --array-size\n");
1451                                 rv = 1;
1452                                 break;
1453                         }
1454                 }
1455                 if (devs_found > 1 && raiddisks == 0) {
1456                         /* must be '-a'. */
1457                         if (size >= 0 || chunk || layout_str != NULL || bitmap_file) {
1458                                 pr_err("--add cannot be used with "
1459                                         "other geometry changes in --grow mode\n");
1460                                 rv = 1;
1461                                 break;
1462                         }
1463                         for (dv=devlist->next; dv ; dv=dv->next) {
1464                                 rv = Grow_Add_device(devlist->devname, mdfd,
1465                                                      dv->devname);
1466                                 if (rv)
1467                                         break;
1468                         }
1469                 } else if (bitmap_file) {
1470                         if (size >= 0 || raiddisks || chunk ||
1471                             layout_str != NULL || devs_found > 1) {
1472                                 pr_err("--bitmap changes cannot be "
1473                                         "used with other geometry changes "
1474                                         "in --grow mode\n");
1475                                 rv = 1;
1476                                 break;
1477                         }
1478                         if (c.delay == 0)
1479                                 c.delay = DEFAULT_BITMAP_DELAY;
1480                         rv = Grow_addbitmap(devlist->devname, mdfd, bitmap_file,
1481                                             bitmap_chunk, c.delay, write_behind, c.force);
1482                 } else if (grow_continue)
1483                         rv = Grow_continue_command(devlist->devname,
1484                                                    mdfd, c.backup_file,
1485                                                    c.verbose-c.quiet);
1486                 else if (size >= 0 || raiddisks != 0 || layout_str != NULL
1487                          || chunk != 0 || level != UnSet) {
1488                         rv = Grow_reshape(devlist->devname, mdfd, c.verbose-c.quiet, c.backup_file,
1489                                           size, level, layout_str, chunk, raiddisks,
1490                                           devlist->next,
1491                                           assume_clean, c.force);
1492                 } else if (array_size < 0)
1493                         pr_err("no changes to --grow\n");
1494                 break;
1495         case INCREMENTAL:
1496                 if (rebuild_map) {
1497                         RebuildMap();
1498                 }
1499                 if (c.scan) {
1500                         if (c.runstop <= 0) {
1501                                 pr_err("--incremental --scan meaningless without --run.\n");
1502                                 break;
1503                         }
1504                         if (devmode == 'f') {
1505                                 pr_err("--incremental --scan --fail not supported.\n");
1506                                 break;
1507                         }
1508                         rv = IncrementalScan(c.verbose-c.quiet);
1509                 }
1510                 if (!devlist) {
1511                         if (!rebuild_map && !c.scan) {
1512                                 pr_err("--incremental requires a device.\n");
1513                                 rv = 1;
1514                         }
1515                         break;
1516                 }
1517                 if (devlist->next) {
1518                         pr_err("--incremental can only handle one device.\n");
1519                         rv = 1;
1520                         break;
1521                 }
1522                 if (devmode == 'f')
1523                         rv = IncrementalRemove(devlist->devname, remove_path,
1524                                                c.verbose-c.quiet);
1525                 else
1526                         rv = Incremental(devlist->devname, c.verbose-c.quiet,
1527                                          c.runstop, ss, c.homehost,
1528                                          c.require_homehost, c.autof,
1529                                          c.freeze_reshape);
1530                 break;
1531         case AUTODETECT:
1532                 autodetect();
1533                 break;
1534         }
1535         exit(rv);
1536 }
1537
1538 static int scan_assemble(int autof, struct supertype *ss,
1539                          int readonly, int runstop,
1540                          struct mddev_ident *ident,
1541                          char *homehost, int require_homehost,
1542                          int verbose, int force,
1543                          int freeze_reshape)
1544 {
1545         struct mddev_ident *a, *array_list =  conf_get_ident(NULL);
1546         struct mddev_dev *devlist = conf_get_devs();
1547         struct map_ent *map = NULL;
1548         int cnt = 0;
1549         int rv = 0;
1550         int failures, successes;
1551
1552         if (conf_verify_devnames(array_list)) {
1553                 pr_err("Duplicate MD device names in "
1554                        "conf file were found.\n");
1555                 return 1;
1556         }
1557         if (devlist == NULL) {
1558                 pr_err("No devices listed in conf file were found.\n");
1559                 return 1;
1560         }
1561         for (a = array_list; a ; a = a->next) {
1562                 a->assembled = 0;
1563                 if (a->autof == 0)
1564                         a->autof = autof;
1565         }
1566         if (map_lock(&map))
1567                 pr_err("%s: failed to get "
1568                        "exclusive lock on mapfile\n",
1569                        __func__);
1570         do {
1571                 failures = 0;
1572                 successes = 0;
1573                 rv = 0;
1574                 for (a = array_list; a ; a = a->next) {
1575                         int r;
1576                         if (a->assembled)
1577                                 continue;
1578                         if (a->devname &&
1579                             strcasecmp(a->devname, "<ignore>") == 0)
1580                                 continue;
1581
1582                         r = Assemble(ss, a->devname,
1583                                      a,
1584                                      NULL, NULL, 0,
1585                                      readonly, runstop, NULL,
1586                                      homehost, require_homehost,
1587                                      verbose, force,
1588                                      freeze_reshape);
1589                         if (r == 0) {
1590                                 a->assembled = 1;
1591                                 successes++;
1592                         } else
1593                                 failures++;
1594                         rv |= r;
1595                         cnt++;
1596                 }
1597         } while (failures && successes);
1598         if (homehost && cnt == 0) {
1599                 /* Maybe we can auto-assemble something.
1600                  * Repeatedly call Assemble in auto-assemble mode
1601                  * until it fails
1602                  */
1603                 int rv2;
1604                 int acnt;
1605                 ident->autof = autof;
1606                 do {
1607                         struct mddev_dev *devlist = conf_get_devs();
1608                         acnt = 0;
1609                         do {
1610                                 rv2 = Assemble(ss, NULL,
1611                                                ident,
1612                                                devlist, NULL, 0,
1613                                                readonly,
1614                                                runstop, NULL,
1615                                                homehost,
1616                                                require_homehost,
1617                                                verbose,
1618                                                force,
1619                                                freeze_reshape);
1620                                 if (rv2==0) {
1621                                         cnt++;
1622                                         acnt++;
1623                                 }
1624                         } while (rv2!=2);
1625                         /* Incase there are stacked devices, we need to go around again */
1626                 } while (acnt);
1627                 if (cnt == 0 && rv == 0) {
1628                         pr_err("No arrays found in config file or automatically\n");
1629                         rv = 1;
1630                 } else if (cnt)
1631                         rv = 0;
1632         } else if (cnt == 0 && rv == 0) {
1633                 pr_err("No arrays found in config file\n");
1634                 rv = 1;
1635         }
1636         map_unlock(&map);
1637         return rv;
1638 }
1639
1640 static int misc_scan(char devmode, int verbose, int export, int test,
1641                      char *homehost, char *prefer)
1642 {
1643         /* apply --detail or --wait-clean to
1644          * all devices in /proc/mdstat
1645          */
1646         struct mdstat_ent *ms = mdstat_read(0, 1);
1647         struct mdstat_ent *e;
1648         struct map_ent *map = NULL;
1649         int members;
1650         int v = verbose>1?0:verbose+1;
1651         int rv = 0;
1652
1653         for (members = 0; members <= 1; members++) {
1654                 for (e=ms ; e ; e=e->next) {
1655                         char *name;
1656                         struct map_ent *me;
1657                         int member = e->metadata_version &&
1658                                 strncmp(e->metadata_version,
1659                                         "external:/", 10) == 0;
1660                         if (members != member)
1661                                 continue;
1662                         me = map_by_devnum(&map, e->devnum);
1663                         if (me && me->path
1664                             && strcmp(me->path, "/unknown") != 0)
1665                                 name = me->path;
1666                         else
1667                                 name = get_md_name(e->devnum);
1668
1669                         if (!name) {
1670                                 pr_err("cannot find device file for %s\n",
1671                                         e->dev);
1672                                 continue;
1673                         }
1674                         if (devmode == 'D')
1675                                 rv |= Detail(name, v,
1676                                              export, test,
1677                                              homehost, prefer);
1678                         else
1679                                 rv |= WaitClean(name, -1, v);
1680                         put_md_name(name);
1681                 }
1682         }
1683         free_mdstat(ms);
1684         return rv;
1685 }
1686
1687 static int stop_scan(int verbose)
1688 {
1689         /* apply --stop to all devices in /proc/mdstat */
1690         /* Due to possible stacking of devices, repeat until
1691          * nothing more can be stopped
1692          */
1693         int progress=1, err;
1694         int last = 0;
1695         int rv = 0;
1696         do {
1697                 struct mdstat_ent *ms = mdstat_read(0, 0);
1698                 struct mdstat_ent *e;
1699
1700                 if (!progress) last = 1;
1701                 progress = 0; err = 0;
1702                 for (e=ms ; e ; e=e->next) {
1703                         char *name = get_md_name(e->devnum);
1704                         int mdfd;
1705
1706                         if (!name) {
1707                                 pr_err("cannot find device file for %s\n",
1708                                         e->dev);
1709                                 continue;
1710                         }
1711                         mdfd = open_mddev(name, 1);
1712                         if (mdfd >= 0) {
1713                                 if (Manage_runstop(name, mdfd, -1, verbose, !last))
1714                                         err = 1;
1715                                 else
1716                                         progress = 1;
1717                                 close(mdfd);
1718                         }
1719
1720                         put_md_name(name);
1721                 }
1722                 free_mdstat(ms);
1723         } while (!last && err);
1724         if (err)
1725                 rv |= 1;
1726         return rv;
1727 }
1728
1729 static int misc_list(struct mddev_dev *devlist,
1730                      int brief, int verbose, int export, int test,
1731                      char *homehost, char *prefer, char *subarray,
1732                      char *update, struct mddev_ident *ident,
1733                      struct supertype *ss, int force)
1734 {
1735         struct mddev_dev *dv;
1736         int rv = 0;
1737
1738         for (dv=devlist ; dv; dv=dv->next) {
1739                 int mdfd;
1740
1741                 switch(dv->disposition) {
1742                 case 'D':
1743                         rv |= Detail(dv->devname,
1744                                      brief?1+verbose:0,
1745                                      export, test, homehost, prefer);
1746                         continue;
1747                 case KillOpt: /* Zero superblock */
1748                         if (ss)
1749                                 rv |= Kill(dv->devname, ss, force, verbose,0);
1750                         else {
1751                                 int v = verbose;
1752                                 do {
1753                                         rv |= Kill(dv->devname, NULL, force, v, 0);
1754                                         v = -1;
1755                                 } while (rv == 0);
1756                                 rv &= ~2;
1757                         }
1758                         continue;
1759                 case 'Q':
1760                         rv |= Query(dv->devname); continue;
1761                 case 'X':
1762                         rv |= ExamineBitmap(dv->devname, brief, ss); continue;
1763                 case 'W':
1764                 case WaitOpt:
1765                         rv |= Wait(dv->devname); continue;
1766                 case Waitclean:
1767                         rv |= WaitClean(dv->devname, -1, verbose); continue;
1768                 case KillSubarray:
1769                         rv |= Kill_subarray(dv->devname, subarray, verbose);
1770                         continue;
1771                 case UpdateSubarray:
1772                         if (update == NULL) {
1773                                 pr_err("-U/--update must be specified with --update-subarray\n");
1774                                 rv |= 1;
1775                                 continue;
1776                         }
1777                         rv |= Update_subarray(dv->devname, subarray,
1778                                               update, ident, verbose);
1779                         continue;
1780                 }
1781                 mdfd = open_mddev(dv->devname, 1);
1782                 if (mdfd>=0) {
1783                         switch(dv->disposition) {
1784                         case 'R':
1785                                 rv |= Manage_runstop(dv->devname, mdfd, 1, verbose, 0); break;
1786                         case 'S':
1787                                 rv |= Manage_runstop(dv->devname, mdfd, -1, verbose, 0); break;
1788                         case 'o':
1789                                 rv |= Manage_ro(dv->devname, mdfd, 1); break;
1790                         case 'w':
1791                                 rv |= Manage_ro(dv->devname, mdfd, -1); break;
1792                         }
1793                         close(mdfd);
1794                 } else
1795                         rv |= 1;
1796         }
1797         return rv;
1798 }