mdadm.c

   1 /*
   2  * mdadm - manage Linux "md" devices aka RAID arrays.
   3  *
   4  * Copyright (C) 2001-2012 Neil Brown <neilb@suse.de>
   5  *
   6  *
   7  *    This program is free software; you can redistribute it and/or modify
   8  *    it under the terms of the GNU General Public License as published by
   9  *    the Free Software Foundation; either version 2 of the License, or
  10  *    (at your option) any later version.
  11  *
  12  *    This program is distributed in the hope that it will be useful,
  13  *    but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  *    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15  *    GNU General Public License for more details.
  16  *
  17  *    You should have received a copy of the GNU General Public License
  18  *    along with this program; if not, write to the Free Software
  19  *    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  20  *
  21  *    Author: Neil Brown
  22  *    Email: <neilb@suse.de>
  23  *
  24  *    Additions for bitmap and write-behind RAID options, Copyright (C) 2003-2004,
  25  *    Paul Clements, SteelEye Technology, Inc.
  26  */
  27
  28 #include "mdadm.h"
  29 #include "md_p.h"
  30 #include <ctype.h>
  31
  32
  33 static int scan_assemble(int autof, struct supertype *ss,
  34                          int readonly, int runstop,
  35                          struct mddev_ident *ident,
  36                          char *homehost, int require_homehost,
  37                          int verbose, int force,
  38                          int freeze_reshape);
  39 static int misc_scan(char devmode, int verbose, int export, int test,
  40                      char *homehost, char *prefer);
  41 static int stop_scan(int quiet);
  42 static int misc_list(struct mddev_dev *devlist,
  43                      int brief, int verbose, int export, int test,
  44                      char *homehost, char *prefer, char *subarray,
  45                      char *update, struct mddev_ident *ident,
  46                      struct supertype *ss, int force, int quiet);
  47
  48
  49 int main(int argc, char *argv[])
  50 {
  51         int mode = 0;
  52         int opt;
  53         int option_index;
  54         char *c;
  55         int rv;
  56         int i;
  57
  58         int chunk = 0;
  59         long long size = -1;
  60         long long array_size = -1;
  61         int level = UnSet;
  62         int layout = UnSet;
  63         char *layout_str = NULL;
  64         int raiddisks = 0;
  65         int sparedisks = 0;
  66         struct mddev_ident ident;
  67         char *configfile = NULL;
  68         char *cp;
  69         char *update = NULL;
  70         int scan = 0;
  71         int devmode = 0;
  72         int runstop = 0;
  73         int readonly = 0;
  74         int write_behind = 0;
  75         int bitmap_fd = -1;
  76         char *bitmap_file = NULL;
  77         char *backup_file = NULL;
  78         int invalid_backup = 0;
  79         int bitmap_chunk = UnSet;
  80         int SparcAdjust = 0;
  81         struct mddev_dev *devlist = NULL;
  82         struct mddev_dev **devlistend = & devlist;
  83         struct mddev_dev *dv;
  84         int devs_found = 0;
  85         int verbose = 0;
  86         int quiet = 0;
  87         int brief = 0;
  88         int force = 0;
  89         int test = 0;
  90         int export = 0;
  91         int assume_clean = 0;
  92         char *prefer = NULL;
  93         char *symlinks = NULL;
  94         int grow_continue = 0;
  95         /* autof indicates whether and how to create device node.
  96          * bottom 3 bits are style.  Rest (when shifted) are number of parts
  97          * 0  - unset
  98          * 1  - don't create (no)
  99          * 2  - if is_standard, then create (yes)
 100          * 3  - create as 'md' - reject is_standard mdp (md)
 101          * 4  - create as 'mdp' - reject is_standard md (mdp)
 102          * 5  - default to md if not is_standard (md in config file)
 103          * 6  - default to mdp if not is_standard (part, or mdp in config file)
 104          */
 105         int autof = 0;
 106
 107         char *homehost = NULL;
 108         char sys_hostname[256];
 109         int require_homehost = 1;
 110         char *mailaddr = NULL;
 111         char *program = NULL;
 112         int increments = 20;
 113         int delay = 0;
 114         int daemonise = 0;
 115         char *pidfile = NULL;
 116         int oneshot = 0;
 117         int spare_sharing = 1;
 118         struct supertype *ss = NULL;
 119         int writemostly = 0;
 120         char *shortopt = short_options;
 121         int dosyslog = 0;
 122         int rebuild_map = 0;
 123         char *subarray = NULL;
 124         char *remove_path = NULL;
 125         char *udev_filename = NULL;
 126
 127         int print_help = 0;
 128         FILE *outf;
 129
 130         int mdfd = -1;
 131
 132         int freeze_reshape = 0;
 133
 134         srandom(time(0) ^ getpid());
 135
 136         ident.uuid_set=0;
 137         ident.level = UnSet;
 138         ident.raid_disks = UnSet;
 139         ident.super_minor= UnSet;
 140         ident.devices=0;
 141         ident.spare_group = NULL;
 142         ident.autof = 0;
 143         ident.st = NULL;
 144         ident.bitmap_fd = -1;
 145         ident.bitmap_file = NULL;
 146         ident.name[0] = 0;
 147         ident.container = NULL;
 148         ident.member = NULL;
 149
 150         while ((option_index = -1) ,
 151                (opt=getopt_long(argc, argv,
 152                                 shortopt, long_options,
 153                                 &option_index)) != -1) {
 154                 int newmode = mode;
 155                 /* firstly, some mode-independent options */
 156                 switch(opt) {
 157                 case HelpOptions:
 158                         print_help = 2;
 159                         continue;
 160                 case 'h':
 161                         print_help = 1;
 162                         continue;
 163
 164                 case 'V':
 165                         fputs(Version, stderr);
 166                         exit(0);
 167
 168                 case 'v': verbose++;
 169                         continue;
 170
 171                 case 'q': quiet++;
 172                         continue;
 173
 174                 case 'b':
 175                         if (mode == ASSEMBLE || mode == BUILD || mode == CREATE
 176                             || mode == GROW || mode == INCREMENTAL
 177                             || mode == MANAGE)
 178                                 break; /* b means bitmap */
 179                 case Brief:
 180                         brief = 1;
 181                         continue;
 182
 183                 case 'Y': export++;
 184                         continue;
 185
 186                 case HomeHost:
 187                         if (strcasecmp(optarg, "<ignore>") == 0)
 188                                 require_homehost = 0;
 189                         else
 190                                 homehost = optarg;
 191                         continue;
 192
 193                 /*
 194                  * --offroot sets first char of argv[0] to @. This is used
 195                  * by systemd to signal that the task was launched from
 196                  * initrd/initramfs and should be preserved during shutdown
 197                  */
 198                 case OffRootOpt:
 199                         argv[0][0] = '@';
 200                         __offroot = 1;
 201                         continue;
 202
 203                 case Prefer:
 204                         if (prefer)
 205                                 free(prefer);
 206                         if (asprintf(&prefer, "/%s/", optarg) <= 0)
 207                                 prefer = NULL;
 208                         continue;
 209
 210                 case ':':
 211                 case '?':
 212                         fputs(Usage, stderr);
 213                         exit(2);
 214                 }
 215                 /* second, figure out the mode.
 216                  * Some options force the mode.  Others
 217                  * set the mode if it isn't already
 218                  */
 219
 220                 switch(opt) {
 221                 case ManageOpt:
 222                         newmode = MANAGE;
 223                         shortopt = short_bitmap_options;
 224                         break;
 225                 case 'a':
 226                 case Add:
 227                 case 'r':
 228                 case Remove:
 229                 case 'f':
 230                 case Fail:
 231                 case ReAdd: /* re-add */
 232                         if (!mode) {
 233                                 newmode = MANAGE;
 234                                 shortopt = short_bitmap_options;
 235                         }
 236                         break;
 237
 238                 case 'A': newmode = ASSEMBLE;
 239                         shortopt = short_bitmap_auto_options;
 240                         break;
 241                 case 'B': newmode = BUILD;
 242                         shortopt = short_bitmap_auto_options;
 243                         break;
 244                 case 'C': newmode = CREATE;
 245                         shortopt = short_bitmap_auto_options;
 246                         break;
 247                 case 'F': newmode = MONITOR;
 248                         break;
 249                 case 'G': newmode = GROW;
 250                         shortopt = short_bitmap_options;
 251                         break;
 252                 case 'I': newmode = INCREMENTAL;
 253                         shortopt = short_bitmap_auto_options;
 254                         break;
 255                 case AutoDetect:
 256                         newmode = AUTODETECT;
 257                         break;
 258
 259                 case MiscOpt:
 260                 case 'D':
 261                 case 'E':
 262                 case 'X':
 263                 case 'Q':
 264                         newmode = MISC;
 265                         break;
 266
 267                 case 'R':
 268                 case 'S':
 269                 case 'o':
 270                 case 'w':
 271                 case 'W':
 272                 case WaitOpt:
 273                 case Waitclean:
 274                 case DetailPlatform:
 275                 case KillSubarray:
 276                 case UpdateSubarray:
 277                 case UdevRules:
 278                 case KillOpt:
 279                         if (!mode)
 280                                 newmode = MISC;
 281                         break;
 282
 283                 case NoSharing:
 284                         newmode = MONITOR;
 285                         break;
 286                 }
 287                 if (mode && newmode == mode) {
 288                         /* everybody happy ! */
 289                 } else if (mode && newmode != mode) {
 290                         /* not allowed.. */
 291                         pr_err("");
 292                         if (option_index >= 0)
 293                                 fprintf(stderr, "--%s", long_options[option_index].name);
 294                         else
 295                                 fprintf(stderr, "-%c", opt);
 296                         fprintf(stderr, " would set mdadm mode to \"%s\", but it is already set to \"%s\".\n",
 297                                 map_num(modes, newmode),
 298                                 map_num(modes, mode));
 299                         exit(2);
 300                 } else if (!mode && newmode) {
 301                         mode = newmode;
 302                         if (mode == MISC && devs_found) {
 303                                 pr_err("No action given for %s in --misc mode\n",
 304                                         devlist->devname);
 305                                 fprintf(stderr,"       Action options must come before device names\n");
 306                                 exit(2);
 307                         }
 308                 } else {
 309                         /* special case of -c --help */
 310                         if ((opt == 'c' || opt == ConfigFile) &&
 311                             ( strncmp(optarg, "--h", 3)==0 ||
 312                               strncmp(optarg, "-h", 2)==0)) {
 313                                 fputs(Help_config, stdout);
 314                                 exit(0);
 315                         }
 316
 317                         /* If first option is a device, don't force the mode yet */
 318                         if (opt == 1) {
 319                                 if (devs_found == 0) {
 320                                         dv = xmalloc(sizeof(*dv));
 321                                         dv->devname = optarg;
 322                                         dv->disposition = devmode;
 323                                         dv->writemostly = writemostly;
 324                                         dv->used = 0;
 325                                         dv->next = NULL;
 326                                         *devlistend = dv;
 327                                         devlistend = &dv->next;
 328
 329                                         devs_found++;
 330                                         continue;
 331                                 }
 332                                 /* No mode yet, and this is the second device ... */
 333                                 pr_err("An option must be given to set the mode before a second device\n"
 334                                         "       (%s) is listed\n", optarg);
 335                                 exit(2);
 336                         }
 337                         if (option_index >= 0)
 338                                 pr_err("--%s", long_options[option_index].name);
 339                         else
 340                                 pr_err("-%c", opt);
 341                         fprintf(stderr, " does not set the mode, and so cannot be the first option.\n");
 342                         exit(2);
 343                 }
 344
 345                 /* if we just set the mode, then done */
 346                 switch(opt) {
 347                 case ManageOpt:
 348                 case MiscOpt:
 349                 case 'A':
 350                 case 'B':
 351                 case 'C':
 352                 case 'F':
 353                 case 'G':
 354                 case 'I':
 355                 case AutoDetect:
 356                         continue;
 357                 }
 358                 if (opt == 1) {
 359                         /* an undecorated option - must be a device name.
 360                          */
 361                         if (devs_found > 0 && mode == MANAGE && !devmode) {
 362                                 pr_err("Must give one of -a/-r/-f"
 363                                         " for subsequent devices at %s\n", optarg);
 364                                 exit(2);
 365                         }
 366                         if (devs_found > 0 && mode == GROW && !devmode) {
 367                                 pr_err("Must give -a/--add for"
 368                                        " devices to add: %s\n", optarg);
 369                                 exit(2);
 370                         }
 371                         dv = xmalloc(sizeof(*dv));
 372                         dv->devname = optarg;
 373                         dv->disposition = devmode;
 374                         dv->writemostly = writemostly;
 375                         dv->used = 0;
 376                         dv->next = NULL;
 377                         *devlistend = dv;
 378                         devlistend = &dv->next;
 379
 380                         devs_found++;
 381                         continue;
 382                 }
 383
 384                 /* We've got a mode, and opt is now something else which
 385                  * could depend on the mode */
 386 #define O(a,b) ((a<<16)|b)
 387                 switch (O(mode,opt)) {
 388                 case O(GROW,'c'):
 389                 case O(GROW,ChunkSize):
 390                 case O(CREATE,'c'):
 391                 case O(CREATE,ChunkSize):
 392                 case O(BUILD,'c'): /* chunk or rounding */
 393                 case O(BUILD,ChunkSize): /* chunk or rounding */
 394                         if (chunk) {
 395                                 pr_err("chunk/rounding may only be specified once. "
 396                                         "Second value is %s.\n", optarg);
 397                                 exit(2);
 398                         }
 399                         chunk = parse_size(optarg);
 400                         if (chunk < 8 || (chunk&1)) {
 401                                 pr_err("invalid chunk/rounding value: %s\n",
 402                                         optarg);
 403                                 exit(2);
 404                         }
 405                         /* Convert sectors to K */
 406                         chunk /= 2;
 407                         continue;
 408
 409                 case O(INCREMENTAL, 'e'):
 410                 case O(CREATE,'e'):
 411                 case O(ASSEMBLE,'e'):
 412                 case O(MISC,'e'): /* set metadata (superblock) information */
 413                         if (ss) {
 414                                 pr_err("metadata information already given\n");
 415                                 exit(2);
 416                         }
 417                         for(i=0; !ss && superlist[i]; i++)
 418                                 ss = superlist[i]->match_metadata_desc(optarg);
 419
 420                         if (!ss) {
 421                                 pr_err("unrecognised metadata identifier: %s\n", optarg);
 422                                 exit(2);
 423                         }
 424                         continue;
 425
 426                 case O(MANAGE,'W'):
 427                 case O(MANAGE,WriteMostly):
 428                 case O(BUILD,'W'):
 429                 case O(BUILD,WriteMostly):
 430                 case O(CREATE,'W'):
 431                 case O(CREATE,WriteMostly):
 432                         /* set write-mostly for following devices */
 433                         writemostly = 1;
 434                         continue;
 435
 436                 case O(MANAGE,'w'):
 437                         /* clear write-mostly for following devices */
 438                         writemostly = 2;
 439                         continue;
 440
 441
 442                 case O(GROW,'z'):
 443                 case O(CREATE,'z'):
 444                 case O(BUILD,'z'): /* size */
 445                         if (size >= 0) {
 446                                 pr_err("size may only be specified once. "
 447                                         "Second value is %s.\n", optarg);
 448                                 exit(2);
 449                         }
 450                         if (strcmp(optarg, "max")==0)
 451                                 size = 0;
 452                         else {
 453                                 size = parse_size(optarg);
 454                                 if (size < 8) {
 455                                         pr_err("invalid size: %s\n",
 456                                                 optarg);
 457                                         exit(2);
 458                                 }
 459                                 /* convert sectors to K */
 460                                 size /= 2;
 461                         }
 462                         continue;
 463
 464                 case O(GROW,'Z'): /* array size */
 465                         if (array_size >= 0) {
 466                                 pr_err("array-size may only be specified once. "
 467                                         "Second value is %s.\n", optarg);
 468                                 exit(2);
 469                         }
 470                         if (strcmp(optarg, "max") == 0)
 471                                 array_size = 0;
 472                         else {
 473                                 array_size = parse_size(optarg);
 474                                 if (array_size <= 0) {
 475                                         pr_err("invalid array size: %s\n",
 476                                                 optarg);
 477                                         exit(2);
 478                                 }
 479                         }
 480                         continue;
 481
 482                 case O(GROW,'l'):
 483                 case O(CREATE,'l'):
 484                 case O(BUILD,'l'): /* set raid level*/
 485                         if (level != UnSet) {
 486                                 pr_err("raid level may only be set once.  "
 487                                         "Second value is %s.\n", optarg);
 488                                 exit(2);
 489                         }
 490                         level = map_name(pers, optarg);
 491                         if (level == UnSet) {
 492                                 pr_err("invalid raid level: %s\n",
 493                                         optarg);
 494                                 exit(2);
 495                         }
 496                         if (level != 0 && level != LEVEL_LINEAR && level != 1 &&
 497                             level != LEVEL_MULTIPATH && level != LEVEL_FAULTY &&
 498                             level != 10 &&
 499                             mode == BUILD) {
 500                                 pr_err("Raid level %s not permitted with --build.\n",
 501                                         optarg);
 502                                 exit(2);
 503                         }
 504                         if (sparedisks > 0 && level < 1 && level >= -1) {
 505                                 pr_err("raid level %s is incompatible with spare-devices setting.\n",
 506                                         optarg);
 507                                 exit(2);
 508                         }
 509                         ident.level = level;
 510                         continue;
 511
 512                 case O(GROW, 'p'): /* new layout */
 513                 case O(GROW, Layout):
 514                         if (layout_str) {
 515                                 pr_err("layout may only be sent once.  "
 516                                        "Second value was %s\n", optarg);
 517                                 exit(2);
 518                         }
 519                         layout_str = optarg;
 520                         /* 'Grow' will parse the value */
 521                         continue;
 522
 523                 case O(CREATE,'p'): /* raid5 layout */
 524                 case O(CREATE,Layout):
 525                 case O(BUILD,'p'): /* faulty layout */
 526                 case O(BUILD,Layout):
 527                         if (layout != UnSet) {
 528                                 pr_err("layout may only be sent once.  "
 529                                        "Second value was %s\n", optarg);
 530                                 exit(2);
 531                         }
 532                         switch(level) {
 533                         default:
 534                                 pr_err("layout not meaningful for %s arrays.\n",
 535                                         map_num(pers, level));
 536                                 exit(2);
 537                         case UnSet:
 538                                 pr_err("raid level must be given before layout.\n");
 539                                 exit(2);
 540
 541                         case 5:
 542                                 layout = map_name(r5layout, optarg);
 543                                 if (layout==UnSet) {
 544                                         pr_err("layout %s not understood for raid5.\n",
 545                                                 optarg);
 546                                         exit(2);
 547                                 }
 548                                 break;
 549                         case 6:
 550                                 layout = map_name(r6layout, optarg);
 551                                 if (layout==UnSet) {
 552                                         pr_err("layout %s not understood for raid6.\n",
 553                                                 optarg);
 554                                         exit(2);
 555                                 }
 556                                 break;
 557
 558                         case 10:
 559                                 layout = parse_layout_10(optarg);
 560                                 if (layout < 0) {
 561                                         pr_err("layout for raid10 must be 'nNN', 'oNN' or 'fNN' where NN is a number, not %s\n", optarg);
 562                                         exit(2);
 563                                 }
 564                                 break;
 565                         case LEVEL_FAULTY:
 566                                 /* Faulty
 567                                  * modeNNN
 568                                  */
 569                                 layout = parse_layout_faulty(optarg);
 570                                 if (layout == -1) {
 571                                         pr_err("layout %s not understood for faulty.\n",
 572                                                 optarg);
 573                                         exit(2);
 574                                 }
 575                                 break;
 576                         }
 577                         continue;
 578
 579                 case O(CREATE,AssumeClean):
 580                 case O(BUILD,AssumeClean): /* assume clean */
 581                 case O(GROW,AssumeClean):
 582                         assume_clean = 1;
 583                         continue;
 584
 585                 case O(GROW,'n'):
 586                 case O(CREATE,'n'):
 587                 case O(BUILD,'n'): /* number of raid disks */
 588                         if (raiddisks) {
 589                                 pr_err("raid-devices set twice: %d and %s\n",
 590                                         raiddisks, optarg);
 591                                 exit(2);
 592                         }
 593                         raiddisks = strtol(optarg, &c, 10);
 594                         if (!optarg[0] || *c || raiddisks<=0) {
 595                                 pr_err("invalid number of raid devices: %s\n",
 596                                         optarg);
 597                                 exit(2);
 598                         }
 599                         ident.raid_disks = raiddisks;
 600                         continue;
 601
 602                 case O(CREATE,'x'): /* number of spare (eXtra) disks */
 603                         if (sparedisks) {
 604                                 pr_err("spare-devices set twice: %d and %s\n",
 605                                        sparedisks, optarg);
 606                                 exit(2);
 607                         }
 608                         if (level != UnSet && level <= 0 && level >= -1) {
 609                                 pr_err("spare-devices setting is incompatible with raid level %d\n",
 610                                         level);
 611                                 exit(2);
 612                         }
 613                         sparedisks = strtol(optarg, &c, 10);
 614                         if (!optarg[0] || *c || sparedisks < 0) {
 615                                 pr_err("invalid number of spare-devices: %s\n",
 616                                         optarg);
 617                                 exit(2);
 618                         }
 619                         continue;
 620
 621                 case O(CREATE,'a'):
 622                 case O(CREATE,Auto):
 623                 case O(BUILD,'a'):
 624                 case O(BUILD,Auto):
 625                 case O(INCREMENTAL,'a'):
 626                 case O(INCREMENTAL,Auto):
 627                 case O(ASSEMBLE,'a'):
 628                 case O(ASSEMBLE,Auto): /* auto-creation of device node */
 629                         autof = parse_auto(optarg, "--auto flag", 0);
 630                         continue;
 631
 632                 case O(CREATE,Symlinks):
 633                 case O(BUILD,Symlinks):
 634                 case O(ASSEMBLE,Symlinks): /* auto creation of symlinks in /dev to /dev/md */
 635                         symlinks = optarg;
 636                         continue;
 637
 638                 case O(BUILD,'f'): /* force honouring '-n 1' */
 639                 case O(BUILD,Force): /* force honouring '-n 1' */
 640                 case O(GROW,'f'): /* ditto */
 641                 case O(GROW,Force): /* ditto */
 642                 case O(CREATE,'f'): /* force honouring of device list */
 643                 case O(CREATE,Force): /* force honouring of device list */
 644                 case O(ASSEMBLE,'f'): /* force assembly */
 645                 case O(ASSEMBLE,Force): /* force assembly */
 646                 case O(MISC,'f'): /* force zero */
 647                 case O(MISC,Force): /* force zero */
 648                 case O(MANAGE,Force): /* add device which is too large */
 649                         force=1;
 650                         continue;
 651                         /* now for the Assemble options */
 652                 case O(ASSEMBLE, FreezeReshape):   /* Freeze reshape during
 653                                                     * initrd phase */
 654                 case O(INCREMENTAL, FreezeReshape):
 655                         freeze_reshape = 1;
 656                         continue;
 657                 case O(CREATE,'u'): /* uuid of array */
 658                 case O(ASSEMBLE,'u'): /* uuid of array */
 659                         if (ident.uuid_set) {
 660                                 pr_err("uuid cannot be set twice.  "
 661                                         "Second value %s.\n", optarg);
 662                                 exit(2);
 663                         }
 664                         if (parse_uuid(optarg, ident.uuid))
 665                                 ident.uuid_set = 1;
 666                         else {
 667                                 pr_err("Bad uuid: %s\n", optarg);
 668                                 exit(2);
 669                         }
 670                         continue;
 671
 672                 case O(CREATE,'N'):
 673                 case O(ASSEMBLE,'N'):
 674                 case O(MISC,'N'):
 675                         if (ident.name[0]) {
 676                                 pr_err("name cannot be set twice.   "
 677                                         "Second value %s.\n", optarg);
 678                                 exit(2);
 679                         }
 680                         if (mode == MISC && !subarray) {
 681                                 pr_err("-N/--name only valid with --update-subarray in misc mode\n");
 682                                 exit(2);
 683                         }
 684                         if (strlen(optarg) > 32) {
 685                                 pr_err("name '%s' is too long, 32 chars max.\n",
 686                                         optarg);
 687                                 exit(2);
 688                         }
 689                         strcpy(ident.name, optarg);
 690                         continue;
 691
 692                 case O(ASSEMBLE,'m'): /* super-minor for array */
 693                 case O(ASSEMBLE,SuperMinor):
 694                         if (ident.super_minor != UnSet) {
 695                                 pr_err("super-minor cannot be set twice.  "
 696                                         "Second value: %s.\n", optarg);
 697                                 exit(2);
 698                         }
 699                         if (strcmp(optarg, "dev")==0)
 700                                 ident.super_minor = -2;
 701                         else {
 702                                 ident.super_minor = strtoul(optarg, &cp, 10);
 703                                 if (!optarg[0] || *cp) {
 704                                         pr_err("Bad super-minor number: %s.\n", optarg);
 705                                         exit(2);
 706                                 }
 707                         }
 708                         continue;
 709
 710                 case O(ASSEMBLE,'U'): /* update the superblock */
 711                 case O(MISC,'U'):
 712                         if (update) {
 713                                 pr_err("Can only update one aspect"
 714                                         " of superblock, both %s and %s given.\n",
 715                                         update, optarg);
 716                                 exit(2);
 717                         }
 718                         if (mode == MISC && !subarray) {
 719                                 pr_err("Only subarrays can be"
 720                                         " updated in misc mode\n");
 721                                 exit(2);
 722                         }
 723                         update = optarg;
 724                         if (strcmp(update, "sparc2.2")==0)
 725                                 continue;
 726                         if (strcmp(update, "super-minor") == 0)
 727                                 continue;
 728                         if (strcmp(update, "summaries")==0)
 729                                 continue;
 730                         if (strcmp(update, "resync")==0)
 731                                 continue;
 732                         if (strcmp(update, "uuid")==0)
 733                                 continue;
 734                         if (strcmp(update, "name")==0)
 735                                 continue;
 736                         if (strcmp(update, "homehost")==0)
 737                                 continue;
 738                         if (strcmp(update, "devicesize")==0)
 739                                 continue;
 740                         if (strcmp(update, "no-bitmap")==0)
 741                                 continue;
 742                         if (strcmp(update, "byteorder")==0) {
 743                                 if (ss) {
 744                                         pr_err("must not set metadata"
 745                                                " type with --update=byteorder.\n");
 746                                         exit(2);
 747                                 }
 748                                 for(i=0; !ss && superlist[i]; i++)
 749                                         ss = superlist[i]->match_metadata_desc(
 750                                                 "0.swap");
 751                                 if (!ss) {
 752                                         pr_err("INTERNAL ERROR"
 753                                                 " cannot find 0.swap\n");
 754                                         exit(2);
 755                                 }
 756
 757                                 continue;
 758                         }
 759                         if (strcmp(update,"?") == 0 ||
 760                             strcmp(update, "help") == 0) {
 761                                 outf = stdout;
 762                                 fprintf(outf, Name ": ");
 763                         } else {
 764                                 outf = stderr;
 765                                 fprintf(outf,
 766                                         Name ": '--update=%s' is invalid.  ",
 767                                         update);
 768                         }
 769                         fprintf(outf, "Valid --update options are:\n"
 770                 "     'sparc2.2', 'super-minor', 'uuid', 'name', 'resync',\n"
 771                 "     'summaries', 'homehost', 'byteorder', 'devicesize',\n"
 772                 "     'no-bitmap'\n");
 773                         exit(outf == stdout ? 0 : 2);
 774
 775                 case O(MANAGE,'U'):
 776                         /* update=devicesize is allowed with --re-add */
 777                         if (devmode != 'A') {
 778                                 pr_err("--update in Manage mode only"
 779                                         " allowed with --re-add.\n");
 780                                 exit(1);
 781                         }
 782                         if (update) {
 783                                 pr_err("Can only update one aspect"
 784                                         " of superblock, both %s and %s given.\n",
 785                                         update, optarg);
 786                                 exit(2);
 787                         }
 788                         update = optarg;
 789                         if (strcmp(update, "devicesize") != 0) {
 790                                 pr_err("only 'devicesize' can be"
 791                                         " updated with --re-add\n");
 792                                 exit(2);
 793                         }
 794                         continue;
 795
 796                 case O(INCREMENTAL,NoDegraded):
 797                         pr_err("--no-degraded is deprecated in Incremental mode\n");
 798                 case O(ASSEMBLE,NoDegraded): /* --no-degraded */
 799                         runstop = -1; /* --stop isn't allowed for --assemble,
 800                                        * so we overload slightly */
 801                         continue;
 802
 803                 case O(ASSEMBLE,'c'):
 804                 case O(ASSEMBLE,ConfigFile):
 805                 case O(INCREMENTAL, 'c'):
 806                 case O(INCREMENTAL, ConfigFile):
 807                 case O(MISC, 'c'):
 808                 case O(MISC, ConfigFile):
 809                 case O(MONITOR,'c'):
 810                 case O(MONITOR,ConfigFile):
 811                         if (configfile) {
 812                                 pr_err("configfile cannot be set twice.  "
 813                                         "Second value is %s.\n", optarg);
 814                                 exit(2);
 815                         }
 816                         configfile = optarg;
 817                         set_conffile(configfile);
 818                         /* FIXME possibly check that config file exists.  Even parse it */
 819                         continue;
 820                 case O(ASSEMBLE,'s'): /* scan */
 821                 case O(MISC,'s'):
 822                 case O(MONITOR,'s'):
 823                 case O(INCREMENTAL,'s'):
 824                         scan = 1;
 825                         continue;
 826
 827                 case O(MONITOR,'m'): /* mail address */
 828                 case O(MONITOR,EMail):
 829                         if (mailaddr)
 830                                 pr_err("only specify one mailaddress. %s ignored.\n",
 831                                         optarg);
 832                         else
 833                                 mailaddr = optarg;
 834                         continue;
 835
 836                 case O(MONITOR,'p'): /* alert program */
 837                 case O(MONITOR,ProgramOpt): /* alert program */
 838                         if (program)
 839                                 pr_err("only specify one alter program. %s ignored.\n",
 840                                         optarg);
 841                         else
 842                                 program = optarg;
 843                         continue;
 844
 845                 case O(MONITOR,'r'): /* rebuild increments */
 846                 case O(MONITOR,Increment):
 847                         increments = atoi(optarg);
 848                         if (increments > 99 || increments < 1) {
 849                                 pr_err("please specify positive integer between 1 and 99 as rebuild increments.\n");
 850                                 exit(2);
 851                         }
 852                         continue;
 853
 854                 case O(MONITOR,'d'): /* delay in seconds */
 855                 case O(GROW, 'd'):
 856                 case O(BUILD,'d'): /* delay for bitmap updates */
 857                 case O(CREATE,'d'):
 858                         if (delay)
 859                                 pr_err("only specify delay once. %s ignored.\n",
 860                                         optarg);
 861                         else {
 862                                 delay = strtol(optarg, &c, 10);
 863                                 if (!optarg[0] || *c || delay<1) {
 864                                         pr_err("invalid delay: %s\n",
 865                                                 optarg);
 866                                         exit(2);
 867                                 }
 868                         }
 869                         continue;
 870                 case O(MONITOR,'f'): /* daemonise */
 871                 case O(MONITOR,Fork):
 872                         daemonise = 1;
 873                         continue;
 874                 case O(MONITOR,'i'): /* pid */
 875                         if (pidfile)
 876                                 pr_err("only specify one pid file. %s ignored.\n",
 877                                         optarg);
 878                         else
 879                                 pidfile = optarg;
 880                         continue;
 881                 case O(MONITOR,'1'): /* oneshot */
 882                         oneshot = 1;
 883                         spare_sharing = 0;
 884                         continue;
 885                 case O(MONITOR,'t'): /* test */
 886                         test = 1;
 887                         continue;
 888                 case O(MONITOR,'y'): /* log messages to syslog */
 889                         openlog("mdadm", LOG_PID, SYSLOG_FACILITY);
 890                         dosyslog = 1;
 891                         continue;
 892                 case O(MONITOR, NoSharing):
 893                         spare_sharing = 0;
 894                         continue;
 895
 896                         /* now the general management options.  Some are applicable
 897                          * to other modes. None have arguments.
 898                          */
 899                 case O(GROW,'a'):
 900                 case O(GROW,Add):
 901                 case O(MANAGE,'a'):
 902                 case O(MANAGE,Add): /* add a drive */
 903                         devmode = 'a';
 904                         continue;
 905                 case O(MANAGE,ReAdd):
 906                         devmode = 'A';
 907                         continue;
 908                 case O(MANAGE,'r'): /* remove a drive */
 909                 case O(MANAGE,Remove):
 910                         devmode = 'r';
 911                         continue;
 912                 case O(MANAGE,'f'): /* set faulty */
 913                 case O(MANAGE,Fail):
 914                 case O(INCREMENTAL,'f'):
 915                 case O(INCREMENTAL,Remove):
 916                 case O(INCREMENTAL,Fail): /* r for incremental is taken, use f
 917                                            * even though we will both fail and
 918                                            * remove the device */
 919                         devmode = 'f';
 920                         continue;
 921                 case O(INCREMENTAL,'R'):
 922                 case O(MANAGE,'R'):
 923                 case O(ASSEMBLE,'R'):
 924                 case O(BUILD,'R'):
 925                 case O(CREATE,'R'): /* Run the array */
 926                         if (runstop < 0) {
 927                                 pr_err("Cannot both Stop and Run an array\n");
 928                                 exit(2);
 929                         }
 930                         runstop = 1;
 931                         continue;
 932                 case O(MANAGE,'S'):
 933                         if (runstop > 0) {
 934                                 pr_err("Cannot both Run and Stop an array\n");
 935                                 exit(2);
 936                         }
 937                         runstop = -1;
 938                         continue;
 939                 case O(MANAGE,'t'):
 940                         test = 1;
 941                         continue;
 942
 943                 case O(MISC,'Q'):
 944                 case O(MISC,'D'):
 945                 case O(MISC,'E'):
 946                 case O(MISC,KillOpt):
 947                 case O(MISC,'R'):
 948                 case O(MISC,'S'):
 949                 case O(MISC,'X'):
 950                 case O(MISC,'o'):
 951                 case O(MISC,'w'):
 952                 case O(MISC,'W'):
 953                 case O(MISC, WaitOpt):
 954                 case O(MISC, Waitclean):
 955                 case O(MISC, DetailPlatform):
 956                 case O(MISC, KillSubarray):
 957                 case O(MISC, UpdateSubarray):
 958                         if (opt == KillSubarray || opt == UpdateSubarray) {
 959                                 if (subarray) {
 960                                         pr_err("subarray can only"
 961                                                 " be specified once\n");
 962                                         exit(2);
 963                                 }
 964                                 subarray = optarg;
 965                         }
 966                         if (devmode && devmode != opt &&
 967                             (devmode == 'E' || (opt == 'E' && devmode != 'Q'))) {
 968                                 pr_err("--examine/-E cannot be given with ");
 969                                 if (devmode == 'E') {
 970                                         if (option_index >= 0)
 971                                                 fprintf(stderr, "--%s\n",
 972                                                         long_options[option_index].name);
 973                                         else
 974                                                 fprintf(stderr, "-%c\n", opt);
 975                                 } else if (isalpha(devmode))
 976                                         fprintf(stderr, "-%c\n", devmode);
 977                                 else
 978                                         fprintf(stderr, "previous option\n");
 979                                 exit(2);
 980                         }
 981                         devmode = opt;
 982                         continue;
 983                 case O(MISC, UdevRules):
 984                         if (devmode && devmode != opt) {
 985                                 pr_err("--udev-rules must"
 986                                        " be the only option.\n");
 987                         } else {
 988                                 if (udev_filename)
 989                                         pr_err("only specify one udev "
 990                                                 "rule filename. %s ignored.\n",
 991                                                 optarg);
 992                                 else
 993                                         udev_filename = optarg;
 994                         }
 995                         devmode = opt;
 996                         continue;
 997                 case O(MISC,'t'):
 998                         test = 1;
 999                         continue;
1000
1001                 case O(MISC, Sparc22):
1002                         if (devmode != 'E') {
1003                                 pr_err("--sparc2.2 only allowed with --examine\n");
1004                                 exit(2);
1005                         }
1006                         SparcAdjust = 1;
1007                         continue;
1008
1009                 case O(ASSEMBLE,'b'): /* here we simply set the bitmap file */
1010                 case O(ASSEMBLE,Bitmap):
1011                         if (!optarg) {
1012                                 pr_err("bitmap file needed with -b in --assemble mode\n");
1013                                 exit(2);
1014                         }
1015                         if (strcmp(optarg, "internal")==0) {
1016                                 pr_err("there is no need to specify --bitmap when assembling arrays with internal bitmaps\n");
1017                                 continue;
1018                         }
1019                         bitmap_fd = open(optarg, O_RDWR);
1020                         if (!*optarg || bitmap_fd < 0) {
1021                                 pr_err("cannot open bitmap file %s: %s\n", optarg, strerror(errno));
1022                                 exit(2);
1023                         }
1024                         ident.bitmap_fd = bitmap_fd; /* for Assemble */
1025                         continue;
1026
1027                 case O(ASSEMBLE, BackupFile):
1028                 case O(GROW, BackupFile):
1029                         /* Specify a file into which grow might place a backup,
1030                          * or from which assemble might recover a backup
1031                          */
1032                         if (backup_file) {
1033                                 pr_err("backup file already specified, rejecting %s\n", optarg);
1034                                 exit(2);
1035                         }
1036                         backup_file = optarg;
1037                         continue;
1038
1039                 case O(GROW, Continue):
1040                         /* Continue interrupted grow
1041                          */
1042                         grow_continue = 1;
1043                         continue;
1044                 case O(ASSEMBLE, InvalidBackup):
1045                         /* Acknowledge that the backupfile is invalid, but ask
1046                          * to continue anyway
1047                          */
1048                         invalid_backup = 1;
1049                         continue;
1050
1051                 case O(BUILD,'b'):
1052                 case O(BUILD,Bitmap):
1053                 case O(CREATE,'b'):
1054                 case O(CREATE,Bitmap): /* here we create the bitmap */
1055                         if (strcmp(optarg, "none") == 0) {
1056                                 pr_err("'--bitmap none' only"
1057                                         " supported for --grow\n");
1058                                 exit(2);
1059                         }
1060                         /* FALL THROUGH */
1061                 case O(GROW,'b'):
1062                 case O(GROW,Bitmap):
1063                         if (strcmp(optarg, "internal")== 0 ||
1064                             strcmp(optarg, "none")== 0 ||
1065                             strchr(optarg, '/') != NULL) {
1066                                 bitmap_file = optarg;
1067                                 continue;
1068                         }
1069                         /* probable typo */
1070                         pr_err("bitmap file must contain a '/', or be 'internal', or 'none'\n"
1071                                 "       not '%s'\n", optarg);
1072                         exit(2);
1073
1074                 case O(GROW,BitmapChunk):
1075                 case O(BUILD,BitmapChunk):
1076                 case O(CREATE,BitmapChunk): /* bitmap chunksize */
1077                         bitmap_chunk = parse_size(optarg);
1078                         if (bitmap_chunk <= 0 ||
1079                             bitmap_chunk & (bitmap_chunk - 1)) {
1080                                 pr_err("invalid bitmap chunksize: %s\n",
1081                                        optarg);
1082                                 exit(2);
1083                         }
1084                         bitmap_chunk = bitmap_chunk * 512;
1085                         continue;
1086
1087                 case O(GROW, WriteBehind):
1088                 case O(BUILD, WriteBehind):
1089                 case O(CREATE, WriteBehind): /* write-behind mode */
1090                         write_behind = DEFAULT_MAX_WRITE_BEHIND;
1091                         if (optarg) {
1092                                 write_behind = strtol(optarg, &c, 10);
1093                                 if (write_behind < 0 || *c ||
1094                                     write_behind > 16383) {
1095                                         pr_err("Invalid value for maximum outstanding write-behind writes: %s.\n\tMust be between 0 and 16383.\n", optarg);
1096                                         exit(2);
1097                                 }
1098                         }
1099                         continue;
1100
1101                 case O(INCREMENTAL, 'r'):
1102                 case O(INCREMENTAL, RebuildMapOpt):
1103                         rebuild_map = 1;
1104                         continue;
1105                 case O(INCREMENTAL, IncrementalPath):
1106                         remove_path = optarg;
1107                         continue;
1108                 }
1109                 /* We have now processed all the valid options. Anything else is
1110                  * an error
1111                  */
1112                 if (option_index > 0)
1113                         pr_err(":option --%s not valid in %s mode\n",
1114                                 long_options[option_index].name,
1115                                 map_num(modes, mode));
1116                 else
1117                         pr_err("option -%c not valid in %s mode\n",
1118                                 opt, map_num(modes, mode));
1119                 exit(2);
1120
1121         }
1122
1123         if (print_help) {
1124                 char *help_text;
1125                 if (print_help == 2)
1126                         help_text = OptionHelp;
1127                 else
1128                         help_text = mode_help[mode];
1129                 if (help_text == NULL)
1130                         help_text = Help;
1131                 fputs(help_text,stdout);
1132                 exit(0);
1133         }
1134
1135         if (!mode && devs_found) {
1136                 mode = MISC;
1137                 devmode = 'Q';
1138                 if (devlist->disposition == 0)
1139                         devlist->disposition = devmode;
1140         }
1141         if (!mode) {
1142                 fputs(Usage, stderr);
1143                 exit(2);
1144         }
1145
1146         if (symlinks) {
1147                 struct createinfo *ci = conf_get_create_info();
1148
1149                 if (strcasecmp(symlinks, "yes") == 0)
1150                         ci->symlinks = 1;
1151                 else if (strcasecmp(symlinks, "no") == 0)
1152                         ci->symlinks = 0;
1153                 else {
1154                         pr_err("option --symlinks must be 'no' or 'yes'\n");
1155                         exit(2);
1156                 }
1157         }
1158         /* Ok, got the option parsing out of the way
1159          * hopefully it's mostly right but there might be some stuff
1160          * missing
1161          *
1162          * That is mosty checked in the per-mode stuff but...
1163          *
1164          * For @,B,C and A without -s, the first device listed must be
1165          * an md device.  We check that here and open it.
1166          */
1167
1168         if (mode == MANAGE || mode == BUILD || mode == CREATE
1169             || mode == GROW
1170             || (mode == ASSEMBLE && ! scan)) {
1171                 if (devs_found < 1) {
1172                         pr_err("an md device must be given in this mode\n");
1173                         exit(2);
1174                 }
1175                 if ((int)ident.super_minor == -2 && autof) {
1176                         pr_err("--super-minor=dev is incompatible with --auto\n");
1177                         exit(2);
1178                 }
1179                 if (mode == MANAGE || mode == GROW) {
1180                         mdfd = open_mddev(devlist->devname, 1);
1181                         if (mdfd < 0)
1182                                 exit(1);
1183                 } else
1184                         /* non-existent device is OK */
1185                         mdfd = open_mddev(devlist->devname, 0);
1186                 if (mdfd == -2) {
1187                         pr_err("device %s exists but is not an "
1188                                 "md array.\n", devlist->devname);
1189                         exit(1);
1190                 }
1191                 if ((int)ident.super_minor == -2) {
1192                         struct stat stb;
1193                         if (mdfd < 0) {
1194                                 pr_err("--super-minor=dev given, and "
1195                                         "listed device %s doesn't exist.\n",
1196                                         devlist->devname);
1197                                 exit(1);
1198                         }
1199                         fstat(mdfd, &stb);
1200                         ident.super_minor = minor(stb.st_rdev);
1201                 }
1202                 if (mdfd >= 0 && mode != MANAGE && mode != GROW) {
1203                         /* We don't really want this open yet, we just might
1204                          * have wanted to check some things
1205                          */
1206                         close(mdfd);
1207                         mdfd = -1;
1208                 }
1209         }
1210
1211         if (raiddisks) {
1212                 if (raiddisks == 1 &&  !force && level != LEVEL_FAULTY) {
1213                         pr_err("'1' is an unusual number of drives for an array, so it is probably\n"
1214                                 "     a mistake.  If you really mean it you will need to specify --force before\n"
1215                                 "     setting the number of drives.\n");
1216                         exit(2);
1217                 }
1218         }
1219
1220         if (homehost == NULL)
1221                 homehost = conf_get_homehost(&require_homehost);
1222         if (homehost == NULL || strcasecmp(homehost, "<system>")==0) {
1223                 if (gethostname(sys_hostname, sizeof(sys_hostname)) == 0) {
1224                         sys_hostname[sizeof(sys_hostname)-1] = 0;
1225                         homehost = sys_hostname;
1226                 }
1227         }
1228         if (homehost && (!homehost[0] || strcasecmp(homehost, "<none>") == 0)) {
1229                 homehost = NULL;
1230                 require_homehost = 0;
1231         }
1232
1233         if ((mode == MISC && devmode == 'E')
1234             || (mode == MONITOR && spare_sharing == 0))
1235                 /* Anyone may try this */;
1236         else if (geteuid() != 0) {
1237                 pr_err("must be super-user to perform this action\n");
1238                 exit(1);
1239         }
1240
1241         ident.autof = autof;
1242
1243         rv = 0;
1244         switch(mode) {
1245         case MANAGE:
1246                 /* readonly, add/remove, readwrite, runstop */
1247                 if (readonly>0)
1248                         rv = Manage_ro(devlist->devname, mdfd, readonly);
1249                 if (!rv && devs_found>1)
1250                         rv = Manage_subdevs(devlist->devname, mdfd,
1251                                             devlist->next, verbose-quiet, test,
1252                                             update, force);
1253                 if (!rv && readonly < 0)
1254                         rv = Manage_ro(devlist->devname, mdfd, readonly);
1255                 if (!rv && runstop)
1256                         rv = Manage_runstop(devlist->devname, mdfd, runstop, quiet);
1257                 break;
1258         case ASSEMBLE:
1259                 if (devs_found == 1 && ident.uuid_set == 0 &&
1260                     ident.super_minor == UnSet && ident.name[0] == 0 && !scan ) {
1261                         /* Only a device has been given, so get details from config file */
1262                         struct mddev_ident *array_ident = conf_get_ident(devlist->devname);
1263                         if (array_ident == NULL) {
1264                                 pr_err("%s not identified in config file.\n",
1265                                         devlist->devname);
1266                                 rv |= 1;
1267                                 if (mdfd >= 0)
1268                                         close(mdfd);
1269                         } else {
1270                                 if (array_ident->autof == 0)
1271                                         array_ident->autof = autof;
1272                                 rv |= Assemble(ss, devlist->devname, array_ident,
1273                                                NULL, backup_file, invalid_backup,
1274                                                readonly, runstop, update,
1275                                                homehost, require_homehost,
1276                                                verbose-quiet, force,
1277                                                freeze_reshape);
1278                         }
1279                 } else if (!scan)
1280                         rv = Assemble(ss, devlist->devname, &ident,
1281                                       devlist->next, backup_file, invalid_backup,
1282                                       readonly, runstop, update,
1283                                       homehost, require_homehost,
1284                                       verbose-quiet, force,
1285                                       freeze_reshape);
1286                 else if (devs_found > 0) {
1287                         if (update && devs_found > 1) {
1288                                 pr_err("can only update a single array at a time\n");
1289                                 exit(1);
1290                         }
1291                         if (backup_file && devs_found > 1) {
1292                                 pr_err("can only assemble a single array when providing a backup file.\n");
1293                                 exit(1);
1294                         }
1295                         for (dv = devlist ; dv ; dv=dv->next) {
1296                                 struct mddev_ident *array_ident = conf_get_ident(dv->devname);
1297                                 if (array_ident == NULL) {
1298                                         pr_err("%s not identified in config file.\n",
1299                                                 dv->devname);
1300                                         rv |= 1;
1301                                         continue;
1302                                 }
1303                                 if (array_ident->autof == 0)
1304                                         array_ident->autof = autof;
1305                                 rv |= Assemble(ss, dv->devname, array_ident,
1306                                                NULL, backup_file, invalid_backup,
1307                                                readonly, runstop, update,
1308                                                homehost, require_homehost,
1309                                                verbose-quiet, force,
1310                                                freeze_reshape);
1311                         }
1312                 } else {
1313                         if (update) {
1314                                 pr_err("--update not meaningful with a --scan assembly.\n");
1315                                 exit(1);
1316                         }
1317                         if (backup_file) {
1318                                 pr_err("--backup_file not meaningful with a --scan assembly.\n");
1319                                 exit(1);
1320                         }
1321                         rv = scan_assemble(autof, ss, readonly, runstop,
1322                                            &ident, homehost,
1323                                            require_homehost,
1324                                            verbose - quiet,
1325                                            force, freeze_reshape);
1326                 }
1327
1328                 break;
1329         case BUILD:
1330                 if (delay == 0) delay = DEFAULT_BITMAP_DELAY;
1331                 if (write_behind && !bitmap_file) {
1332                         pr_err("write-behind mode requires a bitmap.\n");
1333                         rv = 1;
1334                         break;
1335                 }
1336                 if (raiddisks == 0) {
1337                         pr_err("no raid-devices specified.\n");
1338                         rv = 1;
1339                         break;
1340                 }
1341
1342                 if (bitmap_file) {
1343                         if (strcmp(bitmap_file, "internal")==0) {
1344                                 pr_err("'internal' bitmaps not supported with --build\n");
1345                                 rv |= 1;
1346                                 break;
1347                         }
1348                 }
1349                 rv = Build(devlist->devname, chunk, level, layout,
1350                            raiddisks, devlist->next, assume_clean,
1351                            bitmap_file, bitmap_chunk, write_behind,
1352                            delay, verbose-quiet, autof, size);
1353                 break;
1354         case CREATE:
1355                 if (delay == 0) delay = DEFAULT_BITMAP_DELAY;
1356                 if (write_behind && !bitmap_file) {
1357                         pr_err("write-behind mode requires a bitmap.\n");
1358                         rv = 1;
1359                         break;
1360                 }
1361                 if (raiddisks == 0) {
1362                         pr_err("no raid-devices specified.\n");
1363                         rv = 1;
1364                         break;
1365                 }
1366
1367                 rv = Create(ss, devlist->devname, chunk, level, layout, size<0 ? 0 : size,
1368                             raiddisks, sparedisks, ident.name, homehost,
1369                             ident.uuid_set ? ident.uuid : NULL,
1370                             devs_found-1, devlist->next, runstop, verbose-quiet, force, assume_clean,
1371                             bitmap_file, bitmap_chunk, write_behind, delay, autof);
1372                 break;
1373         case MISC:
1374                 if (devmode == 'E') {
1375                         if (devlist == NULL && !scan) {
1376                                 pr_err("No devices to examine\n");
1377                                 exit(2);
1378                         }
1379                         if (devlist == NULL)
1380                                 devlist = conf_get_devs();
1381                         if (devlist == NULL) {
1382                                 pr_err("No devices listed in %s\n", configfile?configfile:DefaultConfFile);
1383                                 exit(1);
1384                         }
1385                         if (brief && verbose)
1386                                 brief = 2;
1387                         rv = Examine(devlist, scan?(verbose>1?0:verbose+1):brief,
1388                                      export, scan,
1389                                      SparcAdjust, ss, homehost);
1390                 } else if (devmode == DetailPlatform) {
1391                         rv = Detail_Platform(ss ? ss->ss : NULL, ss ? scan : 1, verbose);
1392                 } else if (devlist == NULL) {
1393                         if (devmode == 'S' && scan)
1394                                 rv = stop_scan(quiet);
1395                         else if ((devmode == 'D' || devmode == Waitclean) && scan)
1396                                 rv = misc_scan(devmode, verbose, export,
1397                                                test, homehost, prefer);
1398                         else if (devmode == UdevRules)
1399                                 rv = Write_rules(udev_filename);
1400                         else {
1401                                 pr_err("No devices given.\n");
1402                                 exit(2);
1403                         }
1404                 } else
1405                         rv = misc_list(devlist, brief, verbose, export, test,
1406                                        homehost, prefer, subarray, update,
1407                                        &ident,
1408                                        ss, force, quiet);
1409                 break;
1410         case MONITOR:
1411                 if (!devlist && !scan) {
1412                         pr_err("Cannot monitor: need --scan or at least one device\n");
1413                         rv = 1;
1414                         break;
1415                 }
1416                 if (pidfile && !daemonise) {
1417                         pr_err("Cannot write a pid file when not in daemon mode\n");
1418                         rv = 1;
1419                         break;
1420                 }
1421                 if (delay == 0) {
1422                         if (get_linux_version() > 2006016)
1423                                 /* mdstat responds to poll */
1424                                 delay = 1000;
1425                         else
1426                                 delay = 60;
1427                 }
1428                 rv= Monitor(devlist, mailaddr, program,
1429                             delay?delay:60, daemonise, scan, oneshot,
1430                             dosyslog, test, pidfile, increments,
1431                             spare_sharing, prefer);
1432                 break;
1433
1434         case GROW:
1435                 if (array_size >= 0) {
1436                         /* alway impose array size first, independent of
1437                          * anything else
1438                          * Do not allow level or raid_disks changes at the
1439                          * same time as that can be irreversibly destructive.
1440                          */
1441                         struct mdinfo sra;
1442                         int err;
1443                         if (raiddisks || level != UnSet) {
1444                                 pr_err("cannot change array size in same operation "
1445                                         "as changing raiddisks or level.\n"
1446                                         "    Change size first, then check that data is still intact.\n");
1447                                 rv = 1;
1448                                 break;
1449                         }
1450                         sysfs_init(&sra, mdfd, 0);
1451                         if (array_size == 0)
1452                                 err = sysfs_set_str(&sra, NULL, "array_size", "default");
1453                         else
1454                                 err = sysfs_set_num(&sra, NULL, "array_size", array_size / 2);
1455                         if (err < 0) {
1456                                 if (errno == E2BIG)
1457                                         pr_err("--array-size setting"
1458                                                 " is too large.\n");
1459                                 else
1460                                         pr_err("current kernel does"
1461                                                 " not support setting --array-size\n");
1462                                 rv = 1;
1463                                 break;
1464                         }
1465                 }
1466                 if (devs_found > 1 && raiddisks == 0) {
1467                         /* must be '-a'. */
1468                         if (size >= 0 || chunk || layout_str != NULL || bitmap_file) {
1469                                 pr_err("--add cannot be used with "
1470                                         "other geometry changes in --grow mode\n");
1471                                 rv = 1;
1472                                 break;
1473                         }
1474                         for (dv=devlist->next; dv ; dv=dv->next) {
1475                                 rv = Grow_Add_device(devlist->devname, mdfd,
1476                                                      dv->devname);
1477                                 if (rv)
1478                                         break;
1479                         }
1480                 } else if (bitmap_file) {
1481                         if (size >= 0 || raiddisks || chunk ||
1482                             layout_str != NULL || devs_found > 1) {
1483                                 pr_err("--bitmap changes cannot be "
1484                                         "used with other geometry changes "
1485                                         "in --grow mode\n");
1486                                 rv = 1;
1487                                 break;
1488                         }
1489                         if (delay == 0)
1490                                 delay = DEFAULT_BITMAP_DELAY;
1491                         rv = Grow_addbitmap(devlist->devname, mdfd, bitmap_file,
1492                                             bitmap_chunk, delay, write_behind, force);
1493                 } else if (grow_continue)
1494                         rv = Grow_continue_command(devlist->devname,
1495                                                    mdfd, backup_file,
1496                                                    verbose);
1497                 else if (size >= 0 || raiddisks != 0 || layout_str != NULL
1498                          || chunk != 0 || level != UnSet) {
1499                         rv = Grow_reshape(devlist->devname, mdfd, quiet, backup_file,
1500                                           size, level, layout_str, chunk, raiddisks,
1501                                           devlist->next,
1502                                           assume_clean, force);
1503                 } else if (array_size < 0)
1504                         pr_err("no changes to --grow\n");
1505                 break;
1506         case INCREMENTAL:
1507                 if (rebuild_map) {
1508                         RebuildMap();
1509                 }
1510                 if (scan) {
1511                         if (runstop <= 0) {
1512                                 pr_err("--incremental --scan meaningless without --run.\n");
1513                                 break;
1514                         }
1515                         if (devmode == 'f') {
1516                                 pr_err("--incremental --scan --fail not supported.\n");
1517                                 break;
1518                         }
1519                         rv = IncrementalScan(verbose);
1520                 }
1521                 if (!devlist) {
1522                         if (!rebuild_map && !scan) {
1523                                 pr_err("--incremental requires a device.\n");
1524                                 rv = 1;
1525                         }
1526                         break;
1527                 }
1528                 if (devlist->next) {
1529                         pr_err("--incremental can only handle one device.\n");
1530                         rv = 1;
1531                         break;
1532                 }
1533                 if (devmode == 'f')
1534                         rv = IncrementalRemove(devlist->devname, remove_path,
1535                                                verbose-quiet);
1536                 else
1537                         rv = Incremental(devlist->devname, verbose-quiet,
1538                                          runstop, ss, homehost,
1539                                          require_homehost, autof,
1540                                          freeze_reshape);
1541                 break;
1542         case AUTODETECT:
1543                 autodetect();
1544                 break;
1545         }
1546         exit(rv);
1547 }
1548
1549 static int scan_assemble(int autof, struct supertype *ss,
1550                          int readonly, int runstop,
1551                          struct mddev_ident *ident,
1552                          char *homehost, int require_homehost,
1553                          int verbose, int force,
1554                          int freeze_reshape)
1555 {
1556         struct mddev_ident *a, *array_list =  conf_get_ident(NULL);
1557         struct mddev_dev *devlist = conf_get_devs();
1558         struct map_ent *map = NULL;
1559         int cnt = 0;
1560         int rv = 0;
1561         int failures, successes;
1562
1563         if (conf_verify_devnames(array_list)) {
1564                 pr_err("Duplicate MD device names in "
1565                        "conf file were found.\n");
1566                 return 1;
1567         }
1568         if (devlist == NULL) {
1569                 pr_err("No devices listed in conf file were found.\n");
1570                 return 1;
1571         }
1572         for (a = array_list; a ; a = a->next) {
1573                 a->assembled = 0;
1574                 if (a->autof == 0)
1575                         a->autof = autof;
1576         }
1577         if (map_lock(&map))
1578                 pr_err("%s: failed to get "
1579                        "exclusive lock on mapfile\n",
1580                        __func__);
1581         do {
1582                 failures = 0;
1583                 successes = 0;
1584                 rv = 0;
1585                 for (a = array_list; a ; a = a->next) {
1586                         int r;
1587                         if (a->assembled)
1588                                 continue;
1589                         if (a->devname &&
1590                             strcasecmp(a->devname, "<ignore>") == 0)
1591                                 continue;
1592
1593                         r = Assemble(ss, a->devname,
1594                                      a,
1595                                      NULL, NULL, 0,
1596                                      readonly, runstop, NULL,
1597                                      homehost, require_homehost,
1598                                      verbose, force,
1599                                      freeze_reshape);
1600                         if (r == 0) {
1601                                 a->assembled = 1;
1602                                 successes++;
1603                         } else
1604                                 failures++;
1605                         rv |= r;
1606                         cnt++;
1607                 }
1608         } while (failures && successes);
1609         if (homehost && cnt == 0) {
1610                 /* Maybe we can auto-assemble something.
1611                  * Repeatedly call Assemble in auto-assemble mode
1612                  * until it fails
1613                  */
1614                 int rv2;
1615                 int acnt;
1616                 ident->autof = autof;
1617                 do {
1618                         struct mddev_dev *devlist = conf_get_devs();
1619                         acnt = 0;
1620                         do {
1621                                 rv2 = Assemble(ss, NULL,
1622                                                ident,
1623                                                devlist, NULL, 0,
1624                                                readonly,
1625                                                runstop, NULL,
1626                                                homehost,
1627                                                require_homehost,
1628                                                verbose,
1629                                                force,
1630                                                freeze_reshape);
1631                                 if (rv2==0) {
1632                                         cnt++;
1633                                         acnt++;
1634                                 }
1635                         } while (rv2!=2);
1636                         /* Incase there are stacked devices, we need to go around again */
1637                 } while (acnt);
1638                 if (cnt == 0 && rv == 0) {
1639                         pr_err("No arrays found in config file or automatically\n");
1640                         rv = 1;
1641                 } else if (cnt)
1642                         rv = 0;
1643         } else if (cnt == 0 && rv == 0) {
1644                 pr_err("No arrays found in config file\n");
1645                 rv = 1;
1646         }
1647         map_unlock(&map);
1648         return rv;
1649 }
1650
1651 static int misc_scan(char devmode, int verbose, int export, int test,
1652                      char *homehost, char *prefer)
1653 {
1654         /* apply --detail or --wait-clean to
1655          * all devices in /proc/mdstat
1656          */
1657         struct mdstat_ent *ms = mdstat_read(0, 1);
1658         struct mdstat_ent *e;
1659         struct map_ent *map = NULL;
1660         int members;
1661         int v = verbose>1?0:verbose+1;
1662         int rv = 0;
1663
1664         for (members = 0; members <= 1; members++) {
1665                 for (e=ms ; e ; e=e->next) {
1666                         char *name;
1667                         struct map_ent *me;
1668                         int member = e->metadata_version &&
1669                                 strncmp(e->metadata_version,
1670                                         "external:/", 10) == 0;
1671                         if (members != member)
1672                                 continue;
1673                         me = map_by_devnum(&map, e->devnum);
1674                         if (me && me->path
1675                             && strcmp(me->path, "/unknown") != 0)
1676                                 name = me->path;
1677                         else
1678                                 name = get_md_name(e->devnum);
1679
1680                         if (!name) {
1681                                 pr_err("cannot find device file for %s\n",
1682                                         e->dev);
1683                                 continue;
1684                         }
1685                         if (devmode == 'D')
1686                                 rv |= Detail(name, v,
1687                                              export, test,
1688                                              homehost, prefer);
1689                         else
1690                                 rv |= WaitClean(name, -1, v);
1691                         put_md_name(name);
1692                 }
1693         }
1694         free_mdstat(ms);
1695         return rv;
1696 }
1697
1698 static int stop_scan(int quiet)
1699 {
1700         /* apply --stop to all devices in /proc/mdstat */
1701         /* Due to possible stacking of devices, repeat until
1702          * nothing more can be stopped
1703          */
1704         int progress=1, err;
1705         int last = 0;
1706         int rv = 0;
1707         do {
1708                 struct mdstat_ent *ms = mdstat_read(0, 0);
1709                 struct mdstat_ent *e;
1710
1711                 if (!progress) last = 1;
1712                 progress = 0; err = 0;
1713                 for (e=ms ; e ; e=e->next) {
1714                         char *name = get_md_name(e->devnum);
1715                         int mdfd;
1716
1717                         if (!name) {
1718                                 pr_err("cannot find device file for %s\n",
1719                                         e->dev);
1720                                 continue;
1721                         }
1722                         mdfd = open_mddev(name, 1);
1723                         if (mdfd >= 0) {
1724                                 if (Manage_runstop(name, mdfd, -1, quiet?1:last?0:-1))
1725                                         err = 1;
1726                                 else
1727                                         progress = 1;
1728                                 close(mdfd);
1729                         }
1730
1731                         put_md_name(name);
1732                 }
1733                 free_mdstat(ms);
1734         } while (!last && err);
1735         if (err)
1736                 rv |= 1;
1737         return rv;
1738 }
1739
1740 static int misc_list(struct mddev_dev *devlist,
1741                      int brief, int verbose, int export, int test,
1742                      char *homehost, char *prefer, char *subarray,
1743                      char *update, struct mddev_ident *ident,
1744                      struct supertype *ss, int force, int quiet)
1745 {
1746         struct mddev_dev *dv;
1747         int rv = 0;
1748
1749         for (dv=devlist ; dv; dv=dv->next) {
1750                 int mdfd;
1751
1752                 switch(dv->disposition) {
1753                 case 'D':
1754                         rv |= Detail(dv->devname,
1755                                      brief?1+verbose:0,
1756                                      export, test, homehost, prefer);
1757                         continue;
1758                 case KillOpt: /* Zero superblock */
1759                         if (ss)
1760                                 rv |= Kill(dv->devname, ss, force, quiet,0);
1761                         else {
1762                                 int q = quiet;
1763                                 do {
1764                                         rv |= Kill(dv->devname, NULL, force, q, 0);
1765                                         q = 1;
1766                                 } while (rv == 0);
1767                                 rv &= ~2;
1768                         }
1769                         continue;
1770                 case 'Q':
1771                         rv |= Query(dv->devname); continue;
1772                 case 'X':
1773                         rv |= ExamineBitmap(dv->devname, brief, ss); continue;
1774                 case 'W':
1775                 case WaitOpt:
1776                         rv |= Wait(dv->devname); continue;
1777                 case Waitclean:
1778                         rv |= WaitClean(dv->devname, -1, verbose-quiet); continue;
1779                 case KillSubarray:
1780                         rv |= Kill_subarray(dv->devname, subarray, quiet);
1781                         continue;
1782                 case UpdateSubarray:
1783                         if (update == NULL) {
1784                                 pr_err("-U/--update must be specified with --update-subarray\n");
1785                                 rv |= 1;
1786                                 continue;
1787                         }
1788                         rv |= Update_subarray(dv->devname, subarray,
1789                                               update, ident, quiet);
1790                         continue;
1791                 }
1792                 mdfd = open_mddev(dv->devname, 1);
1793                 if (mdfd>=0) {
1794                         switch(dv->disposition) {
1795                         case 'R':
1796                                 rv |= Manage_runstop(dv->devname, mdfd, 1, quiet); break;
1797                         case 'S':
1798                                 rv |= Manage_runstop(dv->devname, mdfd, -1, quiet); break;
1799                         case 'o':
1800                                 rv |= Manage_ro(dv->devname, mdfd, 1); break;
1801                         case 'w':
1802                                 rv |= Manage_ro(dv->devname, mdfd, -1); break;
1803                         }
1804                         close(mdfd);
1805                 } else
1806                         rv |= 1;
1807         }
1808         return rv;
1809 }