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         int chunk = 0;
  52         unsigned long long size = 0;
  53         unsigned long long array_size = 0;
  54         int level = UnSet;
  55         int layout = UnSet;
  56         char *layout_str = NULL;
  57         int raiddisks = 0;
  58         int sparedisks = 0;
  59         struct mddev_ident ident;
  60         char *configfile = NULL;
  61         int devmode = 0;
  62         int write_behind = 0;
  63         int bitmap_fd = -1;
  64         char *bitmap_file = NULL;
  65         int bitmap_chunk = UnSet;
  66         struct mddev_dev *devlist = NULL;
  67         struct mddev_dev **devlistend = & devlist;
  68         struct mddev_dev *dv;
  69         int devs_found = 0;
  70         int assume_clean = 0;
  71         char *symlinks = NULL;
  72         int grow_continue = 0;
  73         /* autof indicates whether and how to create device node.
  74          * bottom 3 bits are style.  Rest (when shifted) are number of parts
  75          * 0  - unset
  76          * 1  - don't create (no)
  77          * 2  - if is_standard, then create (yes)
  78          * 3  - create as 'md' - reject is_standard mdp (md)
  79          * 4  - create as 'mdp' - reject is_standard md (mdp)
  80          * 5  - default to md if not is_standard (md in config file)
  81          * 6  - default to mdp if not is_standard (part, or mdp in config file)
  82          */
  83         struct context c = {
  84                 .require_homehost = 1,
  85         };
  86
  87         char sys_hostname[256];
  88         char *mailaddr = NULL;
  89         char *program = NULL;
  90         int increments = 20;
  91         int daemonise = 0;
  92         char *pidfile = NULL;
  93         int oneshot = 0;
  94         int spare_sharing = 1;
  95         struct supertype *ss = NULL;
  96         int writemostly = 0;
  97         char *shortopt = short_options;
  98         int dosyslog = 0;
  99         int rebuild_map = 0;
 100         char *remove_path = NULL;
 101         char *udev_filename = NULL;
 102
 103         int print_help = 0;
 104         FILE *outf;
 105
 106         int mdfd = -1;
 107
 108         srandom(time(0) ^ getpid());
 109
 110         ident.uuid_set=0;
 111         ident.level = UnSet;
 112         ident.raid_disks = UnSet;
 113         ident.super_minor= UnSet;
 114         ident.devices=0;
 115         ident.spare_group = NULL;
 116         ident.autof = 0;
 117         ident.st = NULL;
 118         ident.bitmap_fd = -1;
 119         ident.bitmap_file = NULL;
 120         ident.name[0] = 0;
 121         ident.container = NULL;
 122         ident.member = NULL;
 123
 124         while ((option_index = -1) ,
 125                (opt=getopt_long(argc, argv,
 126                                 shortopt, long_options,
 127                                 &option_index)) != -1) {
 128                 int newmode = mode;
 129                 /* firstly, some mode-independent options */
 130                 switch(opt) {
 131                 case HelpOptions:
 132                         print_help = 2;
 133                         continue;
 134                 case 'h':
 135                         print_help = 1;
 136                         continue;
 137
 138                 case 'V':
 139                         fputs(Version, stderr);
 140                         exit(0);
 141
 142                 case 'v': c.verbose++;
 143                         continue;
 144
 145                 case 'q': c.verbose--;
 146                         continue;
 147
 148                 case 'b':
 149                         if (mode == ASSEMBLE || mode == BUILD || mode == CREATE
 150                             || mode == GROW || mode == INCREMENTAL
 151                             || mode == MANAGE)
 152                                 break; /* b means bitmap */
 153                 case Brief:
 154                         c.brief = 1;
 155                         continue;
 156
 157                 case 'Y': c.export++;
 158                         continue;
 159
 160                 case HomeHost:
 161                         if (strcasecmp(optarg, "<ignore>") == 0)
 162                                 c.require_homehost = 0;
 163                         else
 164                                 c.homehost = optarg;
 165                         continue;
 166
 167                 /*
 168                  * --offroot sets first char of argv[0] to @. This is used
 169                  * by systemd to signal that the task was launched from
 170                  * initrd/initramfs and should be preserved during shutdown
 171                  */
 172                 case OffRootOpt:
 173                         argv[0][0] = '@';
 174                         __offroot = 1;
 175                         continue;
 176
 177                 case Prefer:
 178                         if (c.prefer)
 179                                 free(c.prefer);
 180                         if (asprintf(&c.prefer, "/%s/", optarg) <= 0)
 181                                 c.prefer = NULL;
 182                         continue;
 183
 184                 case ':':
 185                 case '?':
 186                         fputs(Usage, stderr);
 187                         exit(2);
 188                 }
 189                 /* second, figure out the mode.
 190                  * Some options force the mode.  Others
 191                  * set the mode if it isn't already
 192                  */
 193
 194                 switch(opt) {
 195                 case ManageOpt:
 196                         newmode = MANAGE;
 197                         shortopt = short_bitmap_options;
 198                         break;
 199                 case 'a':
 200                 case Add:
 201                 case 'r':
 202                 case Remove:
 203                 case 'f':
 204                 case Fail:
 205                 case ReAdd: /* re-add */
 206                         if (!mode) {
 207                                 newmode = MANAGE;
 208                                 shortopt = short_bitmap_options;
 209                         }
 210                         break;
 211
 212                 case 'A': newmode = ASSEMBLE;
 213                         shortopt = short_bitmap_auto_options;
 214                         break;
 215                 case 'B': newmode = BUILD;
 216                         shortopt = short_bitmap_auto_options;
 217                         break;
 218                 case 'C': newmode = CREATE;
 219                         shortopt = short_bitmap_auto_options;
 220                         break;
 221                 case 'F': newmode = MONITOR;
 222                         break;
 223                 case 'G': newmode = GROW;
 224                         shortopt = short_bitmap_options;
 225                         break;
 226                 case 'I': newmode = INCREMENTAL;
 227                         shortopt = short_bitmap_auto_options;
 228                         break;
 229                 case AutoDetect:
 230                         newmode = AUTODETECT;
 231                         break;
 232
 233                 case MiscOpt:
 234                 case 'D':
 235                 case 'E':
 236                 case 'X':
 237                 case 'Q':
 238                         newmode = MISC;
 239                         break;
 240
 241                 case 'R':
 242                 case 'S':
 243                 case 'o':
 244                 case 'w':
 245                 case 'W':
 246                 case WaitOpt:
 247                 case Waitclean:
 248                 case DetailPlatform:
 249                 case KillSubarray:
 250                 case UpdateSubarray:
 251                 case UdevRules:
 252                 case KillOpt:
 253                         if (!mode)
 254                                 newmode = MISC;
 255                         break;
 256
 257                 case NoSharing:
 258                         newmode = MONITOR;
 259                         break;
 260                 }
 261                 if (mode && newmode == mode) {
 262                         /* everybody happy ! */
 263                 } else if (mode && newmode != mode) {
 264                         /* not allowed.. */
 265                         pr_err("");
 266                         if (option_index >= 0)
 267                                 fprintf(stderr, "--%s", long_options[option_index].name);
 268                         else
 269                                 fprintf(stderr, "-%c", opt);
 270                         fprintf(stderr, " would set mdadm mode to \"%s\", but it is already set to \"%s\".\n",
 271                                 map_num(modes, newmode),
 272                                 map_num(modes, mode));
 273                         exit(2);
 274                 } else if (!mode && newmode) {
 275                         mode = newmode;
 276                         if (mode == MISC && devs_found) {
 277                                 pr_err("No action given for %s in --misc mode\n",
 278                                         devlist->devname);
 279                                 fprintf(stderr,"       Action options must come before device names\n");
 280                                 exit(2);
 281                         }
 282                 } else {
 283                         /* special case of -c --help */
 284                         if ((opt == 'c' || opt == ConfigFile) &&
 285                             ( strncmp(optarg, "--h", 3)==0 ||
 286                               strncmp(optarg, "-h", 2)==0)) {
 287                                 fputs(Help_config, stdout);
 288                                 exit(0);
 289                         }
 290
 291                         /* If first option is a device, don't force the mode yet */
 292                         if (opt == 1) {
 293                                 if (devs_found == 0) {
 294                                         dv = xmalloc(sizeof(*dv));
 295                                         dv->devname = optarg;
 296                                         dv->disposition = devmode;
 297                                         dv->writemostly = writemostly;
 298                                         dv->used = 0;
 299                                         dv->next = NULL;
 300                                         *devlistend = dv;
 301                                         devlistend = &dv->next;
 302
 303                                         devs_found++;
 304                                         continue;
 305                                 }
 306                                 /* No mode yet, and this is the second device ... */
 307                                 pr_err("An option must be given to set the mode before a second device\n"
 308                                         "       (%s) is listed\n", optarg);
 309                                 exit(2);
 310                         }
 311                         if (option_index >= 0)
 312                                 pr_err("--%s", long_options[option_index].name);
 313                         else
 314                                 pr_err("-%c", opt);
 315                         fprintf(stderr, " does not set the mode, and so cannot be the first option.\n");
 316                         exit(2);
 317                 }
 318
 319                 /* if we just set the mode, then done */
 320                 switch(opt) {
 321                 case ManageOpt:
 322                 case MiscOpt:
 323                 case 'A':
 324                 case 'B':
 325                 case 'C':
 326                 case 'F':
 327                 case 'G':
 328                 case 'I':
 329                 case AutoDetect:
 330                         continue;
 331                 }
 332                 if (opt == 1) {
 333                         /* an undecorated option - must be a device name.
 334                          */
 335                         if (devs_found > 0 && mode == MANAGE && !devmode) {
 336                                 pr_err("Must give one of -a/-r/-f"
 337                                         " for subsequent devices at %s\n", optarg);
 338                                 exit(2);
 339                         }
 340                         if (devs_found > 0 && mode == GROW && !devmode) {
 341                                 pr_err("Must give -a/--add for"
 342                                        " devices to add: %s\n", optarg);
 343                                 exit(2);
 344                         }
 345                         dv = xmalloc(sizeof(*dv));
 346                         dv->devname = optarg;
 347                         dv->disposition = devmode;
 348                         dv->writemostly = writemostly;
 349                         dv->used = 0;
 350                         dv->next = NULL;
 351                         *devlistend = dv;
 352                         devlistend = &dv->next;
 353
 354                         devs_found++;
 355                         continue;
 356                 }
 357
 358                 /* We've got a mode, and opt is now something else which
 359                  * could depend on the mode */
 360 #define O(a,b) ((a<<16)|b)
 361                 switch (O(mode,opt)) {
 362                 case O(GROW,'c'):
 363                 case O(GROW,ChunkSize):
 364                 case O(CREATE,'c'):
 365                 case O(CREATE,ChunkSize):
 366                 case O(BUILD,'c'): /* chunk or rounding */
 367                 case O(BUILD,ChunkSize): /* chunk or rounding */
 368                         if (chunk) {
 369                                 pr_err("chunk/rounding may only be specified once. "
 370                                         "Second value is %s.\n", optarg);
 371                                 exit(2);
 372                         }
 373                         chunk = parse_size(optarg);
 374                         if (chunk < 8 || (chunk&1)) {
 375                                 pr_err("invalid chunk/rounding value: %s\n",
 376                                         optarg);
 377                                 exit(2);
 378                         }
 379                         /* Convert sectors to K */
 380                         chunk /= 2;
 381                         continue;
 382
 383                 case O(INCREMENTAL, 'e'):
 384                 case O(CREATE,'e'):
 385                 case O(ASSEMBLE,'e'):
 386                 case O(MISC,'e'): /* set metadata (superblock) information */
 387                         if (ss) {
 388                                 pr_err("metadata information already given\n");
 389                                 exit(2);
 390                         }
 391                         for(i=0; !ss && superlist[i]; i++)
 392                                 ss = superlist[i]->match_metadata_desc(optarg);
 393
 394                         if (!ss) {
 395                                 pr_err("unrecognised metadata identifier: %s\n", optarg);
 396                                 exit(2);
 397                         }
 398                         continue;
 399
 400                 case O(MANAGE,'W'):
 401                 case O(MANAGE,WriteMostly):
 402                 case O(BUILD,'W'):
 403                 case O(BUILD,WriteMostly):
 404                 case O(CREATE,'W'):
 405                 case O(CREATE,WriteMostly):
 406                         /* set write-mostly for following devices */
 407                         writemostly = 1;
 408                         continue;
 409
 410                 case O(MANAGE,'w'):
 411                         /* clear write-mostly for following devices */
 412                         writemostly = 2;
 413                         continue;
 414
 415
 416                 case O(GROW,'z'):
 417                 case O(CREATE,'z'):
 418                 case O(BUILD,'z'): /* size */
 419                         if (size > 0) {
 420                                 pr_err("size may only be specified once. "
 421                                         "Second value is %s.\n", optarg);
 422                                 exit(2);
 423                         }
 424                         if (strcmp(optarg, "max")==0)
 425                                 size = MAX_SIZE;
 426                         else {
 427                                 size = parse_size(optarg);
 428                                 if (size < 8) {
 429                                         pr_err("invalid size: %s\n",
 430                                                 optarg);
 431                                         exit(2);
 432                                 }
 433                                 /* convert sectors to K */
 434                                 size /= 2;
 435                         }
 436                         continue;
 437
 438                 case O(GROW,'Z'): /* array size */
 439                         if (array_size > 0) {
 440                                 pr_err("array-size may only be specified once. "
 441                                         "Second value is %s.\n", optarg);
 442                                 exit(2);
 443                         }
 444                         if (strcmp(optarg, "max") == 0)
 445                                 array_size = MAX_SIZE;
 446                         else {
 447                                 array_size = parse_size(optarg);
 448                                 if (array_size <= 0) {
 449                                         pr_err("invalid array size: %s\n",
 450                                                 optarg);
 451                                         exit(2);
 452                                 }
 453                         }
 454                         continue;
 455
 456                 case O(GROW,'l'):
 457                 case O(CREATE,'l'):
 458                 case O(BUILD,'l'): /* set raid level*/
 459                         if (level != UnSet) {
 460                                 pr_err("raid level may only be set once.  "
 461                                         "Second value is %s.\n", optarg);
 462                                 exit(2);
 463                         }
 464                         level = map_name(pers, optarg);
 465                         if (level == UnSet) {
 466                                 pr_err("invalid raid level: %s\n",
 467                                         optarg);
 468                                 exit(2);
 469                         }
 470                         if (level != 0 && level != LEVEL_LINEAR && level != 1 &&
 471                             level != LEVEL_MULTIPATH && level != LEVEL_FAULTY &&
 472                             level != 10 &&
 473                             mode == BUILD) {
 474                                 pr_err("Raid level %s not permitted with --build.\n",
 475                                         optarg);
 476                                 exit(2);
 477                         }
 478                         if (sparedisks > 0 && level < 1 && level >= -1) {
 479                                 pr_err("raid level %s is incompatible with spare-devices setting.\n",
 480                                         optarg);
 481                                 exit(2);
 482                         }
 483                         ident.level = level;
 484                         continue;
 485
 486                 case O(GROW, 'p'): /* new layout */
 487                 case O(GROW, Layout):
 488                         if (layout_str) {
 489                                 pr_err("layout may only be sent once.  "
 490                                        "Second value was %s\n", optarg);
 491                                 exit(2);
 492                         }
 493                         layout_str = optarg;
 494                         /* 'Grow' will parse the value */
 495                         continue;
 496
 497                 case O(CREATE,'p'): /* raid5 layout */
 498                 case O(CREATE,Layout):
 499                 case O(BUILD,'p'): /* faulty layout */
 500                 case O(BUILD,Layout):
 501                         if (layout != UnSet) {
 502                                 pr_err("layout may only be sent once.  "
 503                                        "Second value was %s\n", optarg);
 504                                 exit(2);
 505                         }
 506                         switch(level) {
 507                         default:
 508                                 pr_err("layout not meaningful for %s arrays.\n",
 509                                         map_num(pers, level));
 510                                 exit(2);
 511                         case UnSet:
 512                                 pr_err("raid level must be given before layout.\n");
 513                                 exit(2);
 514
 515                         case 5:
 516                                 layout = map_name(r5layout, optarg);
 517                                 if (layout==UnSet) {
 518                                         pr_err("layout %s not understood for raid5.\n",
 519                                                 optarg);
 520                                         exit(2);
 521                                 }
 522                                 break;
 523                         case 6:
 524                                 layout = map_name(r6layout, optarg);
 525                                 if (layout==UnSet) {
 526                                         pr_err("layout %s not understood for raid6.\n",
 527                                                 optarg);
 528                                         exit(2);
 529                                 }
 530                                 break;
 531
 532                         case 10:
 533                                 layout = parse_layout_10(optarg);
 534                                 if (layout < 0) {
 535                                         pr_err("layout for raid10 must be 'nNN', 'oNN' or 'fNN' where NN is a number, not %s\n", optarg);
 536                                         exit(2);
 537                                 }
 538                                 break;
 539                         case LEVEL_FAULTY:
 540                                 /* Faulty
 541                                  * modeNNN
 542                                  */
 543                                 layout = parse_layout_faulty(optarg);
 544                                 if (layout == -1) {
 545                                         pr_err("layout %s not understood for faulty.\n",
 546                                                 optarg);
 547                                         exit(2);
 548                                 }
 549                                 break;
 550                         }
 551                         continue;
 552
 553                 case O(CREATE,AssumeClean):
 554                 case O(BUILD,AssumeClean): /* assume clean */
 555                 case O(GROW,AssumeClean):
 556                         assume_clean = 1;
 557                         continue;
 558
 559                 case O(GROW,'n'):
 560                 case O(CREATE,'n'):
 561                 case O(BUILD,'n'): /* number of raid disks */
 562                         if (raiddisks) {
 563                                 pr_err("raid-devices set twice: %d and %s\n",
 564                                         raiddisks, optarg);
 565                                 exit(2);
 566                         }
 567                         raiddisks = parse_num(optarg);
 568                         if (raiddisks <= 0) {
 569                                 pr_err("invalid number of raid devices: %s\n",
 570                                         optarg);
 571                                 exit(2);
 572                         }
 573                         ident.raid_disks = raiddisks;
 574                         continue;
 575
 576                 case O(CREATE,'x'): /* number of spare (eXtra) disks */
 577                         if (sparedisks) {
 578                                 pr_err("spare-devices set twice: %d and %s\n",
 579                                        sparedisks, optarg);
 580                                 exit(2);
 581                         }
 582                         if (level != UnSet && level <= 0 && level >= -1) {
 583                                 pr_err("spare-devices setting is incompatible with raid level %d\n",
 584                                         level);
 585                                 exit(2);
 586                         }
 587                         sparedisks = parse_num(optarg);
 588                         if (sparedisks < 0) {
 589                                 pr_err("invalid number of spare-devices: %s\n",
 590                                         optarg);
 591                                 exit(2);
 592                         }
 593                         continue;
 594
 595                 case O(CREATE,'a'):
 596                 case O(CREATE,Auto):
 597                 case O(BUILD,'a'):
 598                 case O(BUILD,Auto):
 599                 case O(INCREMENTAL,'a'):
 600                 case O(INCREMENTAL,Auto):
 601                 case O(ASSEMBLE,'a'):
 602                 case O(ASSEMBLE,Auto): /* auto-creation of device node */
 603                         c.autof = parse_auto(optarg, "--auto flag", 0);
 604                         continue;
 605
 606                 case O(CREATE,Symlinks):
 607                 case O(BUILD,Symlinks):
 608                 case O(ASSEMBLE,Symlinks): /* auto creation of symlinks in /dev to /dev/md */
 609                         symlinks = optarg;
 610                         continue;
 611
 612                 case O(BUILD,'f'): /* force honouring '-n 1' */
 613                 case O(BUILD,Force): /* force honouring '-n 1' */
 614                 case O(GROW,'f'): /* ditto */
 615                 case O(GROW,Force): /* ditto */
 616                 case O(CREATE,'f'): /* force honouring of device list */
 617                 case O(CREATE,Force): /* force honouring of device list */
 618                 case O(ASSEMBLE,'f'): /* force assembly */
 619                 case O(ASSEMBLE,Force): /* force assembly */
 620                 case O(MISC,'f'): /* force zero */
 621                 case O(MISC,Force): /* force zero */
 622                 case O(MANAGE,Force): /* add device which is too large */
 623                         c.force=1;
 624                         continue;
 625                         /* now for the Assemble options */
 626                 case O(ASSEMBLE, FreezeReshape):   /* Freeze reshape during
 627                                                     * initrd phase */
 628                 case O(INCREMENTAL, FreezeReshape):
 629                         c.freeze_reshape = 1;
 630                         continue;
 631                 case O(CREATE,'u'): /* uuid of array */
 632                 case O(ASSEMBLE,'u'): /* uuid of array */
 633                         if (ident.uuid_set) {
 634                                 pr_err("uuid cannot be set twice.  "
 635                                         "Second value %s.\n", optarg);
 636                                 exit(2);
 637                         }
 638                         if (parse_uuid(optarg, ident.uuid))
 639                                 ident.uuid_set = 1;
 640                         else {
 641                                 pr_err("Bad uuid: %s\n", optarg);
 642                                 exit(2);
 643                         }
 644                         continue;
 645
 646                 case O(CREATE,'N'):
 647                 case O(ASSEMBLE,'N'):
 648                 case O(MISC,'N'):
 649                         if (ident.name[0]) {
 650                                 pr_err("name cannot be set twice.   "
 651                                         "Second value %s.\n", optarg);
 652                                 exit(2);
 653                         }
 654                         if (mode == MISC && !c.subarray) {
 655                                 pr_err("-N/--name only valid with --update-subarray in misc mode\n");
 656                                 exit(2);
 657                         }
 658                         if (strlen(optarg) > 32) {
 659                                 pr_err("name '%s' is too long, 32 chars max.\n",
 660                                         optarg);
 661                                 exit(2);
 662                         }
 663                         strcpy(ident.name, optarg);
 664                         continue;
 665
 666                 case O(ASSEMBLE,'m'): /* super-minor for array */
 667                 case O(ASSEMBLE,SuperMinor):
 668                         if (ident.super_minor != UnSet) {
 669                                 pr_err("super-minor cannot be set twice.  "
 670                                         "Second value: %s.\n", optarg);
 671                                 exit(2);
 672                         }
 673                         if (strcmp(optarg, "dev")==0)
 674                                 ident.super_minor = -2;
 675                         else {
 676                                 ident.super_minor = parse_num(optarg);
 677                                 if (ident.super_minor < 0) {
 678                                         pr_err("Bad super-minor number: %s.\n", optarg);
 679                                         exit(2);
 680                                 }
 681                         }
 682                         continue;
 683
 684                 case O(ASSEMBLE,'o'):
 685                 case O(MANAGE,'o'):
 686                 case O(CREATE,'o'):
 687                         c.readonly = 1;
 688                         continue;
 689
 690                 case O(ASSEMBLE,'U'): /* update the superblock */
 691                 case O(MISC,'U'):
 692                         if (c.update) {
 693                                 pr_err("Can only update one aspect"
 694                                         " of superblock, both %s and %s given.\n",
 695                                         c.update, optarg);
 696                                 exit(2);
 697                         }
 698                         if (mode == MISC && !c.subarray) {
 699                                 pr_err("Only subarrays can be"
 700                                         " updated in misc mode\n");
 701                                 exit(2);
 702                         }
 703                         c.update = optarg;
 704                         if (strcmp(c.update, "sparc2.2")==0)
 705                                 continue;
 706                         if (strcmp(c.update, "super-minor") == 0)
 707                                 continue;
 708                         if (strcmp(c.update, "summaries")==0)
 709                                 continue;
 710                         if (strcmp(c.update, "resync")==0)
 711                                 continue;
 712                         if (strcmp(c.update, "uuid")==0)
 713                                 continue;
 714                         if (strcmp(c.update, "name")==0)
 715                                 continue;
 716                         if (strcmp(c.update, "homehost")==0)
 717                                 continue;
 718                         if (strcmp(c.update, "devicesize")==0)
 719                                 continue;
 720                         if (strcmp(c.update, "no-bitmap")==0)
 721                                 continue;
 722                         if (strcmp(c.update, "byteorder")==0) {
 723                                 if (ss) {
 724                                         pr_err("must not set metadata"
 725                                                " type with --update=byteorder.\n");
 726                                         exit(2);
 727                                 }
 728                                 for(i=0; !ss && superlist[i]; i++)
 729                                         ss = superlist[i]->match_metadata_desc(
 730                                                 "0.swap");
 731                                 if (!ss) {
 732                                         pr_err("INTERNAL ERROR"
 733                                                 " cannot find 0.swap\n");
 734                                         exit(2);
 735                                 }
 736
 737                                 continue;
 738                         }
 739                         if (strcmp(c.update,"?") == 0 ||
 740                             strcmp(c.update, "help") == 0) {
 741                                 outf = stdout;
 742                                 fprintf(outf, Name ": ");
 743                         } else {
 744                                 outf = stderr;
 745                                 fprintf(outf,
 746                                         Name ": '--update=%s' is invalid.  ",
 747                                         c.update);
 748                         }
 749                         fprintf(outf, "Valid --update options are:\n"
 750                 "     'sparc2.2', 'super-minor', 'uuid', 'name', 'resync',\n"
 751                 "     'summaries', 'homehost', 'byteorder', 'devicesize',\n"
 752                 "     'no-bitmap'\n");
 753                         exit(outf == stdout ? 0 : 2);
 754
 755                 case O(MANAGE,'U'):
 756                         /* update=devicesize is allowed with --re-add */
 757                         if (devmode != 'A') {
 758                                 pr_err("--update in Manage mode only"
 759                                         " allowed with --re-add.\n");
 760                                 exit(1);
 761                         }
 762                         if (c.update) {
 763                                 pr_err("Can only update one aspect"
 764                                         " of superblock, both %s and %s given.\n",
 765                                         c.update, optarg);
 766                                 exit(2);
 767                         }
 768                         c.update = optarg;
 769                         if (strcmp(c.update, "devicesize") != 0) {
 770                                 pr_err("only 'devicesize' 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                                 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                         bitmap_chunk = parse_size(optarg);
1058                         if (bitmap_chunk <= 0 ||
1059                             bitmap_chunk & (bitmap_chunk - 1)) {
1060                                 pr_err("invalid bitmap chunksize: %s\n",
1061                                        optarg);
1062                                 exit(2);
1063                         }
1064                         bitmap_chunk = 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                         write_behind = DEFAULT_MAX_WRITE_BEHIND;
1071                         if (optarg) {
1072                                 write_behind = parse_num(optarg);
1073                                 if (write_behind < 0 ||
1074                                     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 (raiddisks) {
1192                 if (raiddisks == 1 &&  !c.force && 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 (write_behind && !bitmap_file) {
1301                         pr_err("write-behind mode requires a bitmap.\n");
1302                         rv = 1;
1303                         break;
1304                 }
1305                 if (raiddisks == 0) {
1306                         pr_err("no raid-devices specified.\n");
1307                         rv = 1;
1308                         break;
1309                 }
1310
1311                 if (bitmap_file) {
1312                         if (strcmp(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, chunk, level, layout,
1319                            raiddisks, devlist->next, assume_clean,
1320                            bitmap_file, bitmap_chunk, write_behind,
1321                            &c, size);
1322                 break;
1323         case CREATE:
1324                 if (c.delay == 0)
1325                         c.delay = DEFAULT_BITMAP_DELAY;
1326                 if (write_behind && !bitmap_file) {
1327                         pr_err("write-behind mode requires a bitmap.\n");
1328                         rv = 1;
1329                         break;
1330                 }
1331                 if (raiddisks == 0) {
1332                         pr_err("no raid-devices specified.\n");
1333                         rv = 1;
1334                         break;
1335                 }
1336
1337                 rv = Create(ss, devlist->devname, chunk, level, layout, size,
1338                             raiddisks, sparedisks, ident.name,
1339                             ident.uuid_set ? ident.uuid : NULL,
1340                             devs_found-1, devlist->next,
1341                             assume_clean,
1342                             bitmap_file, bitmap_chunk, write_behind, &c);
1343                 break;
1344         case MISC:
1345                 if (devmode == 'E') {
1346                         if (devlist == NULL && !c.scan) {
1347                                 pr_err("No devices to examine\n");
1348                                 exit(2);
1349                         }
1350                         if (devlist == NULL)
1351                                 devlist = conf_get_devs();
1352                         if (devlist == NULL) {
1353                                 pr_err("No devices listed in %s\n", configfile?configfile:DefaultConfFile);
1354                                 exit(1);
1355                         }
1356                         rv = Examine(devlist, &c, ss);
1357                 } else if (devmode == DetailPlatform) {
1358                         rv = Detail_Platform(ss ? ss->ss : NULL, ss ? c.scan : 1, c.verbose);
1359                 } else if (devlist == NULL) {
1360                         if (devmode == 'S' && c.scan)
1361                                 rv = stop_scan(c.verbose);
1362                         else if ((devmode == 'D' || devmode == Waitclean) && c.scan)
1363                                 rv = misc_scan(devmode, &c);
1364                         else if (devmode == UdevRules)
1365                                 rv = Write_rules(udev_filename);
1366                         else {
1367                                 pr_err("No devices given.\n");
1368                                 exit(2);
1369                         }
1370                 } else
1371                         rv = misc_list(devlist, &ident, ss, &c);
1372                 break;
1373         case MONITOR:
1374                 if (!devlist && !c.scan) {
1375                         pr_err("Cannot monitor: need --scan or at least one device\n");
1376                         rv = 1;
1377                         break;
1378                 }
1379                 if (pidfile && !daemonise) {
1380                         pr_err("Cannot write a pid file when not in daemon mode\n");
1381                         rv = 1;
1382                         break;
1383                 }
1384                 if (c.delay == 0) {
1385                         if (get_linux_version() > 2006016)
1386                                 /* mdstat responds to poll */
1387                                 c.delay = 1000;
1388                         else
1389                                 c.delay = 60;
1390                 }
1391                 if (c.delay == 0)
1392                         c.delay = 60;
1393                 rv= Monitor(devlist, mailaddr, program,
1394                             &c, daemonise, oneshot,
1395                             dosyslog, pidfile, increments,
1396                             spare_sharing);
1397                 break;
1398
1399         case GROW:
1400                 if (array_size > 0) {
1401                         /* alway impose array size first, independent of
1402                          * anything else
1403                          * Do not allow level or raid_disks changes at the
1404                          * same time as that can be irreversibly destructive.
1405                          */
1406                         struct mdinfo sra;
1407                         int err;
1408                         if (raiddisks || level != UnSet) {
1409                                 pr_err("cannot change array size in same operation "
1410                                         "as changing raiddisks or level.\n"
1411                                         "    Change size first, then check that data is still intact.\n");
1412                                 rv = 1;
1413                                 break;
1414                         }
1415                         sysfs_init(&sra, mdfd, 0);
1416                         if (array_size == MAX_SIZE)
1417                                 err = sysfs_set_str(&sra, NULL, "array_size", "default");
1418                         else
1419                                 err = sysfs_set_num(&sra, NULL, "array_size", array_size / 2);
1420                         if (err < 0) {
1421                                 if (errno == E2BIG)
1422                                         pr_err("--array-size setting"
1423                                                 " is too large.\n");
1424                                 else
1425                                         pr_err("current kernel does"
1426                                                 " not support setting --array-size\n");
1427                                 rv = 1;
1428                                 break;
1429                         }
1430                 }
1431                 if (devs_found > 1 && raiddisks == 0) {
1432                         /* must be '-a'. */
1433                         if (size > 0 || chunk || layout_str != NULL || bitmap_file) {
1434                                 pr_err("--add cannot be used with "
1435                                         "other geometry changes in --grow mode\n");
1436                                 rv = 1;
1437                                 break;
1438                         }
1439                         for (dv=devlist->next; dv ; dv=dv->next) {
1440                                 rv = Grow_Add_device(devlist->devname, mdfd,
1441                                                      dv->devname);
1442                                 if (rv)
1443                                         break;
1444                         }
1445                 } else if (bitmap_file) {
1446                         if (size > 0 || raiddisks || chunk ||
1447                             layout_str != NULL || devs_found > 1) {
1448                                 pr_err("--bitmap changes cannot be "
1449                                         "used with other geometry changes "
1450                                         "in --grow mode\n");
1451                                 rv = 1;
1452                                 break;
1453                         }
1454                         if (c.delay == 0)
1455                                 c.delay = DEFAULT_BITMAP_DELAY;
1456                         rv = Grow_addbitmap(devlist->devname, mdfd, bitmap_file,
1457                                             bitmap_chunk, c.delay, write_behind, c.force);
1458                 } else if (grow_continue)
1459                         rv = Grow_continue_command(devlist->devname,
1460                                                    mdfd, c.backup_file,
1461                                                    c.verbose);
1462                 else if (size > 0 || raiddisks != 0 || layout_str != NULL
1463                          || chunk != 0 || level != UnSet) {
1464                         rv = Grow_reshape(devlist->devname, mdfd, c.verbose, c.backup_file,
1465                                           size, level, layout_str, chunk, raiddisks,
1466                                           devlist->next,
1467                                           assume_clean, c.force);
1468                 } else if (array_size == 0)
1469                         pr_err("no changes to --grow\n");
1470                 break;
1471         case INCREMENTAL:
1472                 if (rebuild_map) {
1473                         RebuildMap();
1474                 }
1475                 if (c.scan) {
1476                         if (c.runstop <= 0) {
1477                                 pr_err("--incremental --scan meaningless without --run.\n");
1478                                 break;
1479                         }
1480                         if (devmode == 'f') {
1481                                 pr_err("--incremental --scan --fail not supported.\n");
1482                                 break;
1483                         }
1484                         rv = IncrementalScan(c.verbose);
1485                 }
1486                 if (!devlist) {
1487                         if (!rebuild_map && !c.scan) {
1488                                 pr_err("--incremental requires a device.\n");
1489                                 rv = 1;
1490                         }
1491                         break;
1492                 }
1493                 if (devlist->next) {
1494                         pr_err("--incremental can only handle one device.\n");
1495                         rv = 1;
1496                         break;
1497                 }
1498                 if (devmode == 'f')
1499                         rv = IncrementalRemove(devlist->devname, remove_path,
1500                                                c.verbose);
1501                 else
1502                         rv = Incremental(devlist->devname, &c, ss);
1503                 break;
1504         case AUTODETECT:
1505                 autodetect();
1506                 break;
1507         }
1508         exit(rv);
1509 }
1510
1511 static int scan_assemble(struct supertype *ss,
1512                          struct context *c,
1513                          struct mddev_ident *ident)
1514 {
1515         struct mddev_ident *a, *array_list =  conf_get_ident(NULL);
1516         struct mddev_dev *devlist = conf_get_devs();
1517         struct map_ent *map = NULL;
1518         int cnt = 0;
1519         int rv = 0;
1520         int failures, successes;
1521
1522         if (conf_verify_devnames(array_list)) {
1523                 pr_err("Duplicate MD device names in "
1524                        "conf file were found.\n");
1525                 return 1;
1526         }
1527         if (devlist == NULL) {
1528                 pr_err("No devices listed in conf file were found.\n");
1529                 return 1;
1530         }
1531         for (a = array_list; a ; a = a->next) {
1532                 a->assembled = 0;
1533                 if (a->autof == 0)
1534                         a->autof = c->autof;
1535         }
1536         if (map_lock(&map))
1537                 pr_err("%s: failed to get "
1538                        "exclusive lock on mapfile\n",
1539                        __func__);
1540         do {
1541                 failures = 0;
1542                 successes = 0;
1543                 rv = 0;
1544                 for (a = array_list; a ; a = a->next) {
1545                         int r;
1546                         if (a->assembled)
1547                                 continue;
1548                         if (a->devname &&
1549                             strcasecmp(a->devname, "<ignore>") == 0)
1550                                 continue;
1551
1552                         r = Assemble(ss, a->devname,
1553                                      a, NULL, c);
1554                         if (r == 0) {
1555                                 a->assembled = 1;
1556                                 successes++;
1557                         } else
1558                                 failures++;
1559                         rv |= r;
1560                         cnt++;
1561                 }
1562         } while (failures && successes);
1563         if (c->homehost && cnt == 0) {
1564                 /* Maybe we can auto-assemble something.
1565                  * Repeatedly call Assemble in auto-assemble mode
1566                  * until it fails
1567                  */
1568                 int rv2;
1569                 int acnt;
1570                 ident->autof = c->autof;
1571                 do {
1572                         struct mddev_dev *devlist = conf_get_devs();
1573                         acnt = 0;
1574                         do {
1575                                 rv2 = Assemble(ss, NULL,
1576                                                ident,
1577                                                devlist, c);
1578                                 if (rv2==0) {
1579                                         cnt++;
1580                                         acnt++;
1581                                 }
1582                         } while (rv2!=2);
1583                         /* Incase there are stacked devices, we need to go around again */
1584                 } while (acnt);
1585                 if (cnt == 0 && rv == 0) {
1586                         pr_err("No arrays found in config file or automatically\n");
1587                         rv = 1;
1588                 } else if (cnt)
1589                         rv = 0;
1590         } else if (cnt == 0 && rv == 0) {
1591                 pr_err("No arrays found in config file\n");
1592                 rv = 1;
1593         }
1594         map_unlock(&map);
1595         return rv;
1596 }
1597
1598 static int misc_scan(char devmode, struct context *c)
1599 {
1600         /* apply --detail or --wait-clean to
1601          * all devices in /proc/mdstat
1602          */
1603         struct mdstat_ent *ms = mdstat_read(0, 1);
1604         struct mdstat_ent *e;
1605         struct map_ent *map = NULL;
1606         int members;
1607         int rv = 0;
1608
1609         for (members = 0; members <= 1; members++) {
1610                 for (e=ms ; e ; e=e->next) {
1611                         char *name;
1612                         struct map_ent *me;
1613                         int member = e->metadata_version &&
1614                                 strncmp(e->metadata_version,
1615                                         "external:/", 10) == 0;
1616                         if (members != member)
1617                                 continue;
1618                         me = map_by_devnum(&map, e->devnum);
1619                         if (me && me->path
1620                             && strcmp(me->path, "/unknown") != 0)
1621                                 name = me->path;
1622                         else
1623                                 name = get_md_name(e->devnum);
1624
1625                         if (!name) {
1626                                 pr_err("cannot find device file for %s\n",
1627                                         e->dev);
1628                                 continue;
1629                         }
1630                         if (devmode == 'D')
1631                                 rv |= Detail(name, c);
1632                         else
1633                                 rv |= WaitClean(name, -1, c->verbose);
1634                         put_md_name(name);
1635                 }
1636         }
1637         free_mdstat(ms);
1638         return rv;
1639 }
1640
1641 static int stop_scan(int verbose)
1642 {
1643         /* apply --stop to all devices in /proc/mdstat */
1644         /* Due to possible stacking of devices, repeat until
1645          * nothing more can be stopped
1646          */
1647         int progress=1, err;
1648         int last = 0;
1649         int rv = 0;
1650         do {
1651                 struct mdstat_ent *ms = mdstat_read(0, 0);
1652                 struct mdstat_ent *e;
1653
1654                 if (!progress) last = 1;
1655                 progress = 0; err = 0;
1656                 for (e=ms ; e ; e=e->next) {
1657                         char *name = get_md_name(e->devnum);
1658                         int mdfd;
1659
1660                         if (!name) {
1661                                 pr_err("cannot find device file for %s\n",
1662                                         e->dev);
1663                                 continue;
1664                         }
1665                         mdfd = open_mddev(name, 1);
1666                         if (mdfd >= 0) {
1667                                 if (Manage_runstop(name, mdfd, -1, verbose, !last))
1668                                         err = 1;
1669                                 else
1670                                         progress = 1;
1671                                 close(mdfd);
1672                         }
1673
1674                         put_md_name(name);
1675                 }
1676                 free_mdstat(ms);
1677         } while (!last && err);
1678         if (err)
1679                 rv |= 1;
1680         return rv;
1681 }
1682
1683 static int misc_list(struct mddev_dev *devlist,
1684                      struct mddev_ident *ident,
1685                      struct supertype *ss, struct context *c)
1686 {
1687         struct mddev_dev *dv;
1688         int rv = 0;
1689
1690         for (dv=devlist ; dv; dv=dv->next) {
1691                 int mdfd;
1692
1693                 switch(dv->disposition) {
1694                 case 'D':
1695                         rv |= Detail(dv->devname, c);
1696                         continue;
1697                 case KillOpt: /* Zero superblock */
1698                         if (ss)
1699                                 rv |= Kill(dv->devname, ss, c->force, c->verbose,0);
1700                         else {
1701                                 int v = c->verbose;
1702                                 do {
1703                                         rv |= Kill(dv->devname, NULL, c->force, v, 0);
1704                                         v = -1;
1705                                 } while (rv == 0);
1706                                 rv &= ~2;
1707                         }
1708                         continue;
1709                 case 'Q':
1710                         rv |= Query(dv->devname); continue;
1711                 case 'X':
1712                         rv |= ExamineBitmap(dv->devname, c->brief, ss); continue;
1713                 case 'W':
1714                 case WaitOpt:
1715                         rv |= Wait(dv->devname); continue;
1716                 case Waitclean:
1717                         rv |= WaitClean(dv->devname, -1, c->verbose); continue;
1718                 case KillSubarray:
1719                         rv |= Kill_subarray(dv->devname, c->subarray, c->verbose);
1720                         continue;
1721                 case UpdateSubarray:
1722                         if (c->update == NULL) {
1723                                 pr_err("-U/--update must be specified with --update-subarray\n");
1724                                 rv |= 1;
1725                                 continue;
1726                         }
1727                         rv |= Update_subarray(dv->devname, c->subarray,
1728                                               c->update, ident, c->verbose);
1729                         continue;
1730                 }
1731                 mdfd = open_mddev(dv->devname, 1);
1732                 if (mdfd>=0) {
1733                         switch(dv->disposition) {
1734                         case 'R':
1735                                 rv |= Manage_runstop(dv->devname, mdfd, 1, c->verbose, 0); break;
1736                         case 'S':
1737                                 rv |= Manage_runstop(dv->devname, mdfd, -1, c->verbose, 0); break;
1738                         case 'o':
1739                                 rv |= Manage_ro(dv->devname, mdfd, 1); break;
1740                         case 'w':
1741                                 rv |= Manage_ro(dv->devname, mdfd, -1); break;
1742                         }
1743                         close(mdfd);
1744                 } else
1745                         rv |= 1;
1746         }
1747         return rv;
1748 }