mdadm.c

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