mdadm.c

   1 /*
   2  * mdadm - manage Linux "md" devices aka RAID arrays.
   3  *
   4  * Copyright (C) 2001-2009 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 int main(int argc, char *argv[])
  34 {
  35         int mode = 0;
  36         int opt;
  37         int option_index;
  38         char *c;
  39         int rv;
  40         int i;
  41
  42         int chunk = 0;
  43         long long size = -1;
  44         long long array_size = -1;
  45         int level = UnSet;
  46         int layout = UnSet;
  47         char *layout_str = NULL;
  48         int raiddisks = 0;
  49         int max_disks = MD_SB_DISKS; /* just a default */
  50         int sparedisks = 0;
  51         struct mddev_ident ident;
  52         char *configfile = NULL;
  53         char *cp;
  54         char *update = NULL;
  55         int scan = 0;
  56         char devmode = 0;
  57         int runstop = 0;
  58         int readonly = 0;
  59         int write_behind = 0;
  60         int bitmap_fd = -1;
  61         char *bitmap_file = NULL;
  62         char *backup_file = NULL;
  63         int bitmap_chunk = UnSet;
  64         int SparcAdjust = 0;
  65         struct mddev_dev *devlist = NULL;
  66         struct mddev_dev **devlistend = & devlist;
  67         struct mddev_dev *dv;
  68         int devs_found = 0;
  69         int verbose = 0;
  70         int quiet = 0;
  71         int brief = 0;
  72         int force = 0;
  73         int test = 0;
  74         int export = 0;
  75         int assume_clean = 0;
  76         char *symlinks = NULL;
  77         /* autof indicates whether and how to create device node.
  78          * bottom 3 bits are style.  Rest (when shifted) are number of parts
  79          * 0  - unset
  80          * 1  - don't create (no)
  81          * 2  - if is_standard, then create (yes)
  82          * 3  - create as 'md' - reject is_standard mdp (md)
  83          * 4  - create as 'mdp' - reject is_standard md (mdp)
  84          * 5  - default to md if not is_standard (md in config file)
  85          * 6  - default to mdp if not is_standard (part, or mdp in config file)
  86          */
  87         int autof = 0;
  88
  89         char *homehost = NULL;
  90         char sys_hostname[256];
  91         int require_homehost = 1;
  92         char *mailaddr = NULL;
  93         char *program = NULL;
  94         int increments = 20;
  95         int delay = 0;
  96         int daemonise = 0;
  97         char *pidfile = NULL;
  98         int oneshot = 0;
  99         int spare_sharing = 1;
 100         struct supertype *ss = NULL;
 101         int writemostly = 0;
 102         int re_add = 0;
 103         char *shortopt = short_options;
 104         int dosyslog = 0;
 105         int rebuild_map = 0;
 106         int auto_update_home = 0;
 107         char *subarray = NULL;
 108         char *remove_path = NULL;
 109
 110         int print_help = 0;
 111         FILE *outf;
 112
 113         int mdfd = -1;
 114
 115         srandom(time(0) ^ getpid());
 116
 117         ident.uuid_set=0;
 118         ident.level = UnSet;
 119         ident.raid_disks = UnSet;
 120         ident.super_minor= UnSet;
 121         ident.devices=0;
 122         ident.spare_group = NULL;
 123         ident.autof = 0;
 124         ident.st = NULL;
 125         ident.bitmap_fd = -1;
 126         ident.bitmap_file = NULL;
 127         ident.name[0] = 0;
 128         ident.container = NULL;
 129         ident.member = NULL;
 130
 131         while ((option_index = -1) ,
 132                (opt=getopt_long(argc, argv,
 133                                 shortopt, long_options,
 134                                 &option_index)) != -1) {
 135                 int newmode = mode;
 136                 /* firstly, some mode-independent options */
 137                 switch(opt) {
 138                 case 'h':
 139                         if (option_index > 0 &&
 140                             strcmp(long_options[option_index].name, "help-options")==0)
 141                                 print_help = 2;
 142                         else
 143                                 print_help = 1;
 144                         continue;
 145
 146                 case 'V':
 147                         fputs(Version, stderr);
 148                         exit(0);
 149
 150                 case 'v': verbose++;
 151                         continue;
 152
 153                 case 'q': quiet++;
 154                         continue;
 155
 156                 case 'b':
 157                         if (mode == ASSEMBLE || mode == BUILD || mode == CREATE || mode == GROW ||
 158                             mode == INCREMENTAL || mode == MANAGE)
 159                                 break; /* b means bitmap */
 160                         brief = 1;
 161                         continue;
 162
 163                 case 'Y': export++;
 164                         continue;
 165
 166                 case HomeHost:
 167                         if (strcasecmp(optarg, "<ignore>") == 0)
 168                                 require_homehost = 0;
 169                         else
 170                                 homehost = optarg;
 171                         continue;
 172
 173                 case ':':
 174                 case '?':
 175                         fputs(Usage, stderr);
 176                         exit(2);
 177                 }
 178                 /* second, figure out the mode.
 179                  * Some options force the mode.  Others
 180                  * set the mode if it isn't already
 181                  */
 182
 183                 switch(opt) {
 184                 case '@': /* just incase they say --manage */
 185                         newmode = MANAGE;
 186                         shortopt = short_bitmap_options;
 187                         break;
 188                 case 'a':
 189                 case 'r':
 190                 case 'f':
 191                 case ReAdd: /* re-add */
 192                         if (!mode) {
 193                                 newmode = MANAGE;
 194                                 shortopt = short_bitmap_options;
 195                         }
 196                         break;
 197
 198                 case 'A': newmode = ASSEMBLE; shortopt = short_bitmap_auto_options; break;
 199                 case 'B': newmode = BUILD; shortopt = short_bitmap_auto_options; break;
 200                 case 'C': newmode = CREATE; shortopt = short_bitmap_auto_options; break;
 201                 case 'F': newmode = MONITOR;break;
 202                 case 'G': newmode = GROW;
 203                         shortopt = short_bitmap_options;
 204                         break;
 205                 case 'I': newmode = INCREMENTAL;
 206                         shortopt = short_bitmap_auto_options; break;
 207                 case AutoDetect:
 208                         newmode = AUTODETECT; break;
 209
 210                 case '#':
 211                 case 'D':
 212                 case 'E':
 213                 case 'X':
 214                 case 'Q': newmode = MISC; break;
 215                 case 'R':
 216                 case 'S':
 217                 case 'o':
 218                 case 'w':
 219                 case 'W':
 220                 case Waitclean:
 221                 case DetailPlatform:
 222                 case KillSubarray:
 223                 case UpdateSubarray:
 224                         if (opt == KillSubarray || opt == UpdateSubarray) {
 225                                 if (subarray) {
 226                                         fprintf(stderr, Name ": subarray can only be specified once\n");
 227                                         exit(2);
 228                                 }
 229                                 subarray = optarg;
 230                         }
 231                 case 'K': if (!mode) newmode = MISC; break;
 232                 case NoSharing: newmode = MONITOR; break;
 233                 }
 234                 if (mode && newmode == mode) {
 235                         /* everybody happy ! */
 236                 } else if (mode && newmode != mode) {
 237                         /* not allowed.. */
 238                         fprintf(stderr, Name ": ");
 239                         if (option_index >= 0)
 240                                 fprintf(stderr, "--%s", long_options[option_index].name);
 241                         else
 242                                 fprintf(stderr, "-%c", opt);
 243                         fprintf(stderr, " would set mdadm mode to \"%s\", but it is already set to \"%s\".\n",
 244                                 map_num(modes, newmode),
 245                                 map_num(modes, mode));
 246                         exit(2);
 247                 } else if (!mode && newmode) {
 248                         mode = newmode;
 249                 } else {
 250                         /* special case of -c --help */
 251                         if (opt == 'c' &&
 252                             ( strncmp(optarg, "--h", 3)==0 ||
 253                               strncmp(optarg, "-h", 2)==0)) {
 254                                 fputs(Help_config, stdout);
 255                                 exit(0);
 256                         }
 257
 258                         /* If first option is a device, don't force the mode yet */
 259                         if (opt == 1) {
 260                                 if (devs_found == 0) {
 261                                         dv = malloc(sizeof(*dv));
 262                                         if (dv == NULL) {
 263                                                 fprintf(stderr, Name ": malloc failed\n");
 264                                                 exit(3);
 265                                         }
 266                                         dv->devname = optarg;
 267                                         dv->disposition = devmode;
 268                                         dv->writemostly = writemostly;
 269                                         dv->re_add = re_add;
 270                                         dv->used = 0;
 271                                         dv->next = NULL;
 272                                         *devlistend = dv;
 273                                         devlistend = &dv->next;
 274
 275                                         devs_found++;
 276                                         continue;
 277                                 }
 278                                 /* No mode yet, and this is the second device ... */
 279                                 fprintf(stderr, Name ": An option must be given to set the mode before a second device\n"
 280                                         "       (%s) is listed\n", optarg);
 281                                 exit(2);
 282                         }
 283                         if (option_index >= 0)
 284                                 fprintf(stderr, Name ": --%s", long_options[option_index].name);
 285                         else
 286                                 fprintf(stderr, Name ": -%c", opt);
 287                         fprintf(stderr, " does not set the mode, and so cannot be the first option.\n");
 288                         exit(2);
 289                 }
 290
 291                 /* if we just set the mode, then done */
 292                 switch(opt) {
 293                 case '@':
 294                 case '#':
 295                 case 'A':
 296                 case 'B':
 297                 case 'C':
 298                 case 'F':
 299                 case 'G':
 300                 case 'I':
 301                 case AutoDetect:
 302                         continue;
 303                 }
 304                 if (opt == 1) {
 305                         /* an undecorated option - must be a device name.
 306                          */
 307                         if (devs_found > 0 && mode == '@' && !devmode) {
 308                                 fprintf(stderr, Name ": Must give one of -a/-r/-f for subsequent devices at %s\n", optarg);
 309                                 exit(2);
 310                         }
 311                         if (devs_found > 0 && mode == 'G' && !devmode) {
 312                                 fprintf(stderr, Name ": Must give one of -a for devices do add: %s\n", optarg);
 313                                 exit(2);
 314                         }
 315                         dv = malloc(sizeof(*dv));
 316                         if (dv == NULL) {
 317                                 fprintf(stderr, Name ": malloc failed\n");
 318                                 exit(3);
 319                         }
 320                         dv->devname = optarg;
 321                         dv->disposition = devmode;
 322                         dv->writemostly = writemostly;
 323                         dv->re_add = re_add;
 324                         dv->used = 0;
 325                         dv->next = NULL;
 326                         *devlistend = dv;
 327                         devlistend = &dv->next;
 328
 329                         devs_found++;
 330                         continue;
 331                 }
 332
 333                 /* We've got a mode, and opt is now something else which
 334                  * could depend on the mode */
 335 #define O(a,b) ((a<<8)|b)
 336                 switch (O(mode,opt)) {
 337                 case O(GROW,'c'):
 338                 case O(CREATE,'c'):
 339                 case O(BUILD,'c'): /* chunk or rounding */
 340                         if (chunk) {
 341                                 fprintf(stderr, Name ": chunk/rounding may only be specified once. "
 342                                         "Second value is %s.\n", optarg);
 343                                 exit(2);
 344                         }
 345                         chunk = strtol(optarg, &c, 10);
 346                         if (!optarg[0] || *c || chunk<4 || ((chunk-1)&chunk)) {
 347                                 fprintf(stderr, Name ": invalid chunk/rounding value: %s\n",
 348                                         optarg);
 349                                 exit(2);
 350                         }
 351                         continue;
 352
 353 #if 0
 354                 case O(ASSEMBLE,AutoHomeHost):
 355                         auto_update_home = 1;
 356                         continue;
 357 #endif
 358                 case O(INCREMENTAL, 'e'):
 359                 case O(CREATE,'e'):
 360                 case O(ASSEMBLE,'e'):
 361                 case O(MISC,'e'): /* set metadata (superblock) information */
 362                         if (ss) {
 363                                 fprintf(stderr, Name ": metadata information already given\n");
 364                                 exit(2);
 365                         }
 366                         for(i=0; !ss && superlist[i]; i++)
 367                                 ss = superlist[i]->match_metadata_desc(optarg);
 368
 369                         if (!ss) {
 370                                 fprintf(stderr, Name ": unrecognised metadata identifier: %s\n", optarg);
 371                                 exit(2);
 372                         }
 373                         max_disks = ss->max_devs;
 374                         continue;
 375
 376                 case O(MANAGE,'W'):
 377                 case O(BUILD,'W'):
 378                 case O(CREATE,'W'):
 379                         /* set write-mostly for following devices */
 380                         writemostly = 1;
 381                         continue;
 382
 383                 case O(MANAGE,'w'):
 384                         /* clear write-mostly for following devices */
 385                         writemostly = 2;
 386                         continue;
 387
 388
 389                 case O(GROW,'z'):
 390                 case O(CREATE,'z'):
 391                 case O(BUILD,'z'): /* size */
 392                         if (size >= 0) {
 393                                 fprintf(stderr, Name ": size may only be specified once. "
 394                                         "Second value is %s.\n", optarg);
 395                                 exit(2);
 396                         }
 397                         if (strcmp(optarg, "max")==0)
 398                                 size = 0;
 399                         else {
 400                                 size = parse_size(optarg);
 401                                 if (size < 8) {
 402                                         fprintf(stderr, Name ": invalid size: %s\n",
 403                                                 optarg);
 404                                         exit(2);
 405                                 }
 406                                 /* convert sectors to K */
 407                                 size /= 2;
 408                         }
 409                         continue;
 410
 411                 case O(GROW,'Z'): /* array size */
 412                         if (array_size >= 0) {
 413                                 fprintf(stderr, Name ": array-size may only be specified once. "
 414                                         "Second value is %s.\n", optarg);
 415                                 exit(2);
 416                         }
 417                         if (strcmp(optarg, "max") == 0)
 418                                 array_size = 0;
 419                         else {
 420                                 array_size = parse_size(optarg);
 421                                 if (array_size <= 0) {
 422                                         fprintf(stderr, Name ": invalid array size: %s\n",
 423                                                 optarg);
 424                                         exit(2);
 425                                 }
 426                         }
 427                         continue;
 428
 429                 case O(GROW,'l'):
 430                 case O(CREATE,'l'):
 431                 case O(BUILD,'l'): /* set raid level*/
 432                         if (level != UnSet) {
 433                                 fprintf(stderr, Name ": raid level may only be set once.  "
 434                                         "Second value is %s.\n", optarg);
 435                                 exit(2);
 436                         }
 437                         level = map_name(pers, optarg);
 438                         if (level == UnSet) {
 439                                 fprintf(stderr, Name ": invalid raid level: %s\n",
 440                                         optarg);
 441                                 exit(2);
 442                         }
 443                         if (level != 0 && level != LEVEL_LINEAR && level != 1 &&
 444                             level != LEVEL_MULTIPATH && level != LEVEL_FAULTY &&
 445                             level != 10 &&
 446                             mode == BUILD) {
 447                                 fprintf(stderr, Name ": Raid level %s not permitted with --build.\n",
 448                                         optarg);
 449                                 exit(2);
 450                         }
 451                         if (sparedisks > 0 && level < 1 && level >= -1) {
 452                                 fprintf(stderr, Name ": raid level %s is incompatible with spare-devices setting.\n",
 453                                         optarg);
 454                                 exit(2);
 455                         }
 456                         ident.level = level;
 457                         continue;
 458
 459                 case O(GROW, 'p'): /* new layout */
 460                         if (layout_str) {
 461                                 fprintf(stderr,Name ": layout may only be sent once.  "
 462                                         "Second value was %s\n", optarg);
 463                                 exit(2);
 464                         }
 465                         layout_str = optarg;
 466                         /* 'Grow' will parse the value */
 467                         continue;
 468
 469                 case O(CREATE,'p'): /* raid5 layout */
 470                 case O(BUILD,'p'): /* faulty layout */
 471                         if (layout != UnSet) {
 472                                 fprintf(stderr,Name ": layout may only be sent once.  "
 473                                         "Second value was %s\n", optarg);
 474                                 exit(2);
 475                         }
 476                         switch(level) {
 477                         default:
 478                                 fprintf(stderr, Name ": layout not meaningful for %s arrays.\n",
 479                                         map_num(pers, level));
 480                                 exit(2);
 481                         case UnSet:
 482                                 fprintf(stderr, Name ": raid level must be given before layout.\n");
 483                                 exit(2);
 484
 485                         case 5:
 486                                 layout = map_name(r5layout, optarg);
 487                                 if (layout==UnSet) {
 488                                         fprintf(stderr, Name ": layout %s not understood for raid5.\n",
 489                                                 optarg);
 490                                         exit(2);
 491                                 }
 492                                 break;
 493                         case 6:
 494                                 layout = map_name(r6layout, optarg);
 495                                 if (layout==UnSet) {
 496                                         fprintf(stderr, Name ": layout %s not understood for raid6.\n",
 497                                                 optarg);
 498                                         exit(2);
 499                                 }
 500                                 break;
 501
 502                         case 10:
 503                                 layout = parse_layout_10(optarg);
 504                                 if (layout < 0) {
 505                                         fprintf(stderr, Name ": layout for raid10 must be 'nNN', 'oNN' or 'fNN' where NN is a number, not %s\n", optarg);
 506                                         exit(2);
 507                                 }
 508                                 break;
 509                         case LEVEL_FAULTY:
 510                                 /* Faulty
 511                                  * modeNNN
 512                                  */
 513                                 layout = parse_layout_faulty(optarg);
 514                                 if (layout == -1) {
 515                                         fprintf(stderr, Name ": layout %s not understood for faulty.\n",
 516                                                 optarg);
 517                                         exit(2);
 518                                 }
 519                                 break;
 520                         }
 521                         continue;
 522
 523                 case O(CREATE,AssumeClean):
 524                 case O(BUILD,AssumeClean): /* assume clean */
 525                         assume_clean = 1;
 526                         continue;
 527
 528                 case O(GROW,'n'):
 529                 case O(CREATE,'n'):
 530                 case O(BUILD,'n'): /* number of raid disks */
 531                         if (raiddisks) {
 532                                 fprintf(stderr, Name ": raid-devices set twice: %d and %s\n",
 533                                         raiddisks, optarg);
 534                                 exit(2);
 535                         }
 536                         raiddisks = strtol(optarg, &c, 10);
 537                         if (!optarg[0] || *c || raiddisks<=0) {
 538                                 fprintf(stderr, Name ": invalid number of raid devices: %s\n",
 539                                         optarg);
 540                                 exit(2);
 541                         }
 542                         ident.raid_disks = raiddisks;
 543                         continue;
 544
 545                 case O(CREATE,'x'): /* number of spare (eXtra) discs */
 546                         if (sparedisks) {
 547                                 fprintf(stderr,Name ": spare-devices set twice: %d and %s\n",
 548                                         sparedisks, optarg);
 549                                 exit(2);
 550                         }
 551                         if (level != UnSet && level <= 0 && level >= -1) {
 552                                 fprintf(stderr, Name ": spare-devices setting is incompatible with raid level %d\n",
 553                                         level);
 554                                 exit(2);
 555                         }
 556                         sparedisks = strtol(optarg, &c, 10);
 557                         if (!optarg[0] || *c || sparedisks < 0) {
 558                                 fprintf(stderr, Name ": invalid number of spare-devices: %s\n",
 559                                         optarg);
 560                                 exit(2);
 561                         }
 562                         continue;
 563
 564                 case O(CREATE,'a'):
 565                 case O(BUILD,'a'):
 566                 case O(INCREMENTAL,'a'):
 567                 case O(ASSEMBLE,'a'): /* auto-creation of device node */
 568                         autof = parse_auto(optarg, "--auto flag", 0);
 569                         continue;
 570
 571                 case O(CREATE,Symlinks):
 572                 case O(BUILD,Symlinks):
 573                 case O(ASSEMBLE,Symlinks): /* auto creation of symlinks in /dev to /dev/md */
 574                         symlinks = optarg;
 575                         continue;
 576
 577                 case O(BUILD,'f'): /* force honouring '-n 1' */
 578                 case O(GROW,'f'): /* ditto */
 579                 case O(CREATE,'f'): /* force honouring of device list */
 580                 case O(ASSEMBLE,'f'): /* force assembly */
 581                 case O(MISC,'f'): /* force zero */
 582                         force=1;
 583                         continue;
 584
 585                         /* now for the Assemble options */
 586                 case O(CREATE,'u'): /* uuid of array */
 587                 case O(ASSEMBLE,'u'): /* uuid of array */
 588                         if (ident.uuid_set) {
 589                                 fprintf(stderr, Name ": uuid cannot be set twice.  "
 590                                         "Second value %s.\n", optarg);
 591                                 exit(2);
 592                         }
 593                         if (parse_uuid(optarg, ident.uuid))
 594                                 ident.uuid_set = 1;
 595                         else {
 596                                 fprintf(stderr,Name ": Bad uuid: %s\n", optarg);
 597                                 exit(2);
 598                         }
 599                         continue;
 600
 601                 case O(CREATE,'N'):
 602                 case O(ASSEMBLE,'N'):
 603                 case O(MISC,'N'):
 604                         if (ident.name[0]) {
 605                                 fprintf(stderr, Name ": name cannot be set twice.   "
 606                                         "Second value %s.\n", optarg);
 607                                 exit(2);
 608                         }
 609                         if (mode == MISC && !subarray) {
 610                                 fprintf(stderr, Name ": -N/--name only valid with --update-subarray in misc mode\n");
 611                                 exit(2);
 612                         }
 613                         if (strlen(optarg) > 32) {
 614                                 fprintf(stderr, Name ": name '%s' is too long, 32 chars max.\n",
 615                                         optarg);
 616                                 exit(2);
 617                         }
 618                         strcpy(ident.name, optarg);
 619                         continue;
 620
 621                 case O(ASSEMBLE,'m'): /* super-minor for array */
 622                         if (ident.super_minor != UnSet) {
 623                                 fprintf(stderr, Name ": super-minor cannot be set twice.  "
 624                                         "Second value: %s.\n", optarg);
 625                                 exit(2);
 626                         }
 627                         if (strcmp(optarg, "dev")==0)
 628                                 ident.super_minor = -2;
 629                         else {
 630                                 ident.super_minor = strtoul(optarg, &cp, 10);
 631                                 if (!optarg[0] || *cp) {
 632                                         fprintf(stderr, Name ": Bad super-minor number: %s.\n", optarg);
 633                                         exit(2);
 634                                 }
 635                         }
 636                         continue;
 637
 638                 case O(ASSEMBLE,'U'): /* update the superblock */
 639                 case O(MISC,'U'):
 640                         if (update) {
 641                                 fprintf(stderr, Name ": Can only update one aspect of superblock, both %s and %s given.\n",
 642                                         update, optarg);
 643                                 exit(2);
 644                         }
 645                         if (mode == MISC && !subarray) {
 646                                 fprintf(stderr, Name ": Only subarrays can be updated in misc mode\n");
 647                                 exit(2);
 648                         }
 649                         update = optarg;
 650                         if (strcmp(update, "sparc2.2")==0)
 651                                 continue;
 652                         if (strcmp(update, "super-minor") == 0)
 653                                 continue;
 654                         if (strcmp(update, "summaries")==0)
 655                                 continue;
 656                         if (strcmp(update, "resync")==0)
 657                                 continue;
 658                         if (strcmp(update, "uuid")==0)
 659                                 continue;
 660                         if (strcmp(update, "name")==0)
 661                                 continue;
 662                         if (strcmp(update, "homehost")==0)
 663                                 continue;
 664                         if (strcmp(update, "devicesize")==0)
 665                                 continue;
 666                         if (strcmp(update, "byteorder")==0) {
 667                                 if (ss) {
 668                                         fprintf(stderr, Name ": must not set metadata type with --update=byteorder.\n");
 669                                         exit(2);
 670                                 }
 671                                 for(i=0; !ss && superlist[i]; i++)
 672                                         ss = superlist[i]->match_metadata_desc("0.swap");
 673                                 if (!ss) {
 674                                         fprintf(stderr, Name ": INTERNAL ERROR cannot find 0.swap\n");
 675                                         exit(2);
 676                                 }
 677
 678                                 continue;
 679                         }
 680                         if (strcmp(update,"?") == 0 ||
 681                             strcmp(update, "help") == 0) {
 682                                 outf = stdout;
 683                                 fprintf(outf, Name ": ");
 684                         } else {
 685                                 outf = stderr;
 686                                 fprintf(outf,
 687                                         Name ": '--update=%s' is invalid.  ",
 688                                         update);
 689                         }
 690                         fprintf(outf, "Valid --update options are:\n"
 691                 "     'sparc2.2', 'super-minor', 'uuid', 'name', 'resync',\n"
 692                 "     'summaries', 'homehost', 'byteorder', 'devicesize'.\n");
 693                         exit(outf == stdout ? 0 : 2);
 694
 695                 case O(INCREMENTAL,NoDegraded):
 696                         fprintf(stderr, Name ": --no-degraded is deprecated in Incremental mode\n");
 697                 case O(ASSEMBLE,NoDegraded): /* --no-degraded */
 698                         runstop = -1; /* --stop isn't allowed for --assemble,
 699                                        * so we overload slightly */
 700                         continue;
 701
 702                 case O(ASSEMBLE,'c'): /* config file */
 703                 case O(INCREMENTAL, 'c'):
 704                 case O(MISC, 'c'):
 705                 case O(MONITOR,'c'):
 706                         if (configfile) {
 707                                 fprintf(stderr, Name ": configfile cannot be set twice.  "
 708                                         "Second value is %s.\n", optarg);
 709                                 exit(2);
 710                         }
 711                         configfile = optarg;
 712                         set_conffile(configfile);
 713                         /* FIXME possibly check that config file exists.  Even parse it */
 714                         continue;
 715                 case O(ASSEMBLE,'s'): /* scan */
 716                 case O(MISC,'s'):
 717                 case O(MONITOR,'s'):
 718                 case O(INCREMENTAL,'s'):
 719                         scan = 1;
 720                         continue;
 721
 722                 case O(MONITOR,'m'): /* mail address */
 723                         if (mailaddr)
 724                                 fprintf(stderr, Name ": only specify one mailaddress. %s ignored.\n",
 725                                         optarg);
 726                         else
 727                                 mailaddr = optarg;
 728                         continue;
 729
 730                 case O(MONITOR,'p'): /* alert program */
 731                         if (program)
 732                                 fprintf(stderr, Name ": only specify one alter program. %s ignored.\n",
 733                                         optarg);
 734                         else
 735                                 program = optarg;
 736                         continue;
 737
 738                 case O(MONITOR,'r'): /* rebuild increments */
 739                         increments = atoi(optarg);
 740                         if (increments>99 || increments<1) {
 741                                 fprintf(stderr, Name ": please specify positive integer between 1 and 99 as rebuild increments.\n");
 742                                 exit(2);
 743                         }
 744                         continue;
 745
 746                 case O(MONITOR,'d'): /* delay in seconds */
 747                 case O(GROW, 'd'):
 748                 case O(BUILD,'d'): /* delay for bitmap updates */
 749                 case O(CREATE,'d'):
 750                         if (delay)
 751                                 fprintf(stderr, Name ": only specify delay once. %s ignored.\n",
 752                                         optarg);
 753                         else {
 754                                 delay = strtol(optarg, &c, 10);
 755                                 if (!optarg[0] || *c || delay<1) {
 756                                         fprintf(stderr, Name ": invalid delay: %s\n",
 757                                                 optarg);
 758                                         exit(2);
 759                                 }
 760                         }
 761                         continue;
 762                 case O(MONITOR,'f'): /* daemonise */
 763                         daemonise = 1;
 764                         continue;
 765                 case O(MONITOR,'i'): /* pid */
 766                         if (pidfile)
 767                                 fprintf(stderr, Name ": only specify one pid file. %s ignored.\n",
 768                                         optarg);
 769                         else
 770                                 pidfile = optarg;
 771                         continue;
 772                 case O(MONITOR,'1'): /* oneshot */
 773                         oneshot = 1;
 774                         continue;
 775                 case O(MONITOR,'t'): /* test */
 776                         test = 1;
 777                         continue;
 778                 case O(MONITOR,'y'): /* log messages to syslog */
 779                         openlog("mdadm", LOG_PID, SYSLOG_FACILITY);
 780                         dosyslog = 1;
 781                         continue;
 782                 case O(MONITOR, NoSharing):
 783                         spare_sharing = 0;
 784                         continue;
 785                         /* now the general management options.  Some are applicable
 786                          * to other modes. None have arguments.
 787                          */
 788                 case O(GROW,'a'):
 789                 case O(MANAGE,'a'): /* add a drive */
 790                         devmode = 'a';
 791                         re_add = 0;
 792                         continue;
 793                 case O(MANAGE,ReAdd):
 794                         devmode = 'a';
 795                         re_add = 1;
 796                         continue;
 797                 case O(MANAGE,'r'): /* remove a drive */
 798                         devmode = 'r';
 799                         continue;
 800                 case O(MANAGE,'f'): /* set faulty */
 801                 case O(INCREMENTAL,'f'): /* r for incremental is taken, use f
 802                                           * even though we will both fail and
 803                                           * remove the device */
 804                         devmode = 'f';
 805                         continue;
 806                 case O(INCREMENTAL,'R'):
 807                 case O(MANAGE,'R'):
 808                 case O(ASSEMBLE,'R'):
 809                 case O(BUILD,'R'):
 810                 case O(CREATE,'R'): /* Run the array */
 811                         if (runstop < 0) {
 812                                 fprintf(stderr, Name ": Cannot both Stop and Run an array\n");
 813                                 exit(2);
 814                         }
 815                         runstop = 1;
 816                         continue;
 817                 case O(MANAGE,'S'):
 818                         if (runstop > 0) {
 819                                 fprintf(stderr, Name ": Cannot both Run and Stop an array\n");
 820                                 exit(2);
 821                         }
 822                         runstop = -1;
 823                         continue;
 824                 case O(MANAGE,'t'):
 825                         test = 1;
 826                         continue;
 827
 828                 case O(MISC,'Q'):
 829                 case O(MISC,'D'):
 830                 case O(MISC,'E'):
 831                 case O(MISC,'K'):
 832                 case O(MISC,'R'):
 833                 case O(MISC,'S'):
 834                 case O(MISC,'X'):
 835                 case O(MISC,'o'):
 836                 case O(MISC,'w'):
 837                 case O(MISC,'W'):
 838                 case O(MISC, Waitclean):
 839                 case O(MISC, DetailPlatform):
 840                 case O(MISC, KillSubarray):
 841                 case O(MISC, UpdateSubarray):
 842                         if (devmode && devmode != opt &&
 843                             (devmode == 'E' || (opt == 'E' && devmode != 'Q'))) {
 844                                 fprintf(stderr, Name ": --examine/-E cannot be given with ");
 845                                 if (devmode == 'E') {
 846                                         if (option_index >= 0)
 847                                                 fprintf(stderr, "--%s\n",
 848                                                         long_options[option_index].name);
 849                                         else
 850                                                 fprintf(stderr, "-%c\n", opt);
 851                                 } else if (isalpha(devmode))
 852                                         fprintf(stderr, "-%c\n", devmode);
 853                                 else
 854                                         fprintf(stderr, "previous option\n");
 855                                 exit(2);
 856                         }
 857                         devmode = opt;
 858                         continue;
 859                 case O(MISC,'t'):
 860                         test = 1;
 861                         continue;
 862
 863                 case O(MISC, Sparc22):
 864                         if (devmode != 'E') {
 865                                 fprintf(stderr, Name ": --sparc2.2 only allowed with --examine\n");
 866                                 exit(2);
 867                         }
 868                         SparcAdjust = 1;
 869                         continue;
 870
 871                 case O(ASSEMBLE,'b'): /* here we simply set the bitmap file */
 872                         if (!optarg) {
 873                                 fprintf(stderr, Name ": bitmap file needed with -b in --assemble mode\n");
 874                                 exit(2);
 875                         }
 876                         if (strcmp(optarg, "internal")==0) {
 877                                 fprintf(stderr, Name ": there is no need to specify --bitmap when assembling arrays with internal bitmaps\n");
 878                                 continue;
 879                         }
 880                         bitmap_fd = open(optarg, O_RDWR);
 881                         if (!*optarg || bitmap_fd < 0) {
 882                                 fprintf(stderr, Name ": cannot open bitmap file %s: %s\n", optarg, strerror(errno));
 883                                 exit(2);
 884                         }
 885                         ident.bitmap_fd = bitmap_fd; /* for Assemble */
 886                         continue;
 887
 888                 case O(ASSEMBLE, BackupFile):
 889                 case O(GROW, BackupFile):
 890                         /* Specify a file into which grow might place a backup,
 891                          * or from which assemble might recover a backup
 892                          */
 893                         if (backup_file) {
 894                                 fprintf(stderr, Name ": backup file already specified, rejecting %s\n", optarg);
 895                                 exit(2);
 896                         }
 897                         backup_file = optarg;
 898                         continue;
 899
 900                 case O(BUILD,'b'):
 901                 case O(CREATE,'b'): /* here we create the bitmap */
 902                         if (strcmp(optarg, "none") == 0) {
 903                                 fprintf(stderr, Name ": '--bitmap none' only"
 904                                         " support for --grow\n");
 905                                 exit(2);
 906                         }
 907                         /* FALL THROUGH */
 908                 case O(GROW,'b'):
 909                         if (strcmp(optarg, "internal")== 0 ||
 910                             strcmp(optarg, "none")== 0 ||
 911                             strchr(optarg, '/') != NULL) {
 912                                 bitmap_file = optarg;
 913                                 continue;
 914                         }
 915                         /* probable typo */
 916                         fprintf(stderr, Name ": bitmap file must contain a '/', or be 'internal', or 'none'\n"
 917                                 "       not '%s'\n", optarg);
 918                         exit(2);
 919
 920                 case O(GROW,BitmapChunk):
 921                 case O(BUILD,BitmapChunk):
 922                 case O(CREATE,BitmapChunk): /* bitmap chunksize */
 923                         bitmap_chunk = strtol(optarg, &c, 10);
 924                         if (!optarg[0] || *c || bitmap_chunk < 0 ||
 925                                         bitmap_chunk & (bitmap_chunk - 1)) {
 926                                 fprintf(stderr, Name ": invalid bitmap chunksize: %s\n",
 927                                                 optarg);
 928                                 exit(2);
 929                         }
 930                         /* convert K to B, chunk of 0K means 512B */
 931                         bitmap_chunk = bitmap_chunk ? bitmap_chunk * 1024 : 512;
 932                         continue;
 933
 934                 case O(GROW, WriteBehind):
 935                 case O(BUILD, WriteBehind):
 936                 case O(CREATE, WriteBehind): /* write-behind mode */
 937                         write_behind = DEFAULT_MAX_WRITE_BEHIND;
 938                         if (optarg) {
 939                                 write_behind = strtol(optarg, &c, 10);
 940                                 if (write_behind < 0 || *c ||
 941                                     write_behind > 16383) {
 942                                         fprintf(stderr, Name ": Invalid value for maximum outstanding write-behind writes: %s.\n\tMust be between 0 and 16383.\n", optarg);
 943                                         exit(2);
 944                                 }
 945                         }
 946                         continue;
 947
 948                 case O(INCREMENTAL, 'r'):
 949                         rebuild_map = 1;
 950                         continue;
 951                 case O(INCREMENTAL, IncrementalPath):
 952                         remove_path = optarg;
 953                         continue;
 954                 }
 955                 /* We have now processed all the valid options. Anything else is
 956                  * an error
 957                  */
 958                 if (option_index > 0)
 959                         fprintf(stderr, Name ":option --%s not valid in %s mode\n",
 960                                 long_options[option_index].name,
 961                                 map_num(modes, mode));
 962                 else
 963                         fprintf(stderr, Name ": option -%c not valid in %s mode\n",
 964                                 opt, map_num(modes, mode));
 965                 exit(2);
 966
 967         }
 968
 969         if (print_help) {
 970                 char *help_text = Help;
 971                 if (print_help == 2)
 972                         help_text = OptionHelp;
 973                 else
 974                         switch (mode) {
 975                         case ASSEMBLE : help_text = Help_assemble; break;
 976                         case BUILD    : help_text = Help_build; break;
 977                         case CREATE   : help_text = Help_create; break;
 978                         case MANAGE   : help_text = Help_manage; break;
 979                         case MISC     : help_text = Help_misc; break;
 980                         case MONITOR  : help_text = Help_monitor; break;
 981                         case GROW     : help_text = Help_grow; break;
 982                         case INCREMENTAL:help_text= Help_incr; break;
 983                         }
 984                 fputs(help_text,stdout);
 985                 exit(0);
 986         }
 987
 988         if (!mode && devs_found) {
 989                 mode = MISC;
 990                 devmode = 'Q';
 991                 if (devlist->disposition == 0)
 992                         devlist->disposition = devmode;
 993         }
 994         if (!mode) {
 995                 fputs(Usage, stderr);
 996                 exit(2);
 997         }
 998
 999         if (symlinks) {
1000                 struct createinfo *ci = conf_get_create_info();
1001
1002                 if (strcasecmp(symlinks, "yes") == 0)
1003                         ci->symlinks = 1;
1004                 else if (strcasecmp(symlinks, "no") == 0)
1005                         ci->symlinks = 0;
1006                 else {
1007                         fprintf(stderr, Name ": option --symlinks must be 'no' or 'yes'\n");
1008                         exit(2);
1009                 }
1010         }
1011         /* Ok, got the option parsing out of the way
1012          * hopefully it's mostly right but there might be some stuff
1013          * missing
1014          *
1015          * That is mosty checked in the per-mode stuff but...
1016          *
1017          * For @,B,C  and A without -s, the first device listed must be an md device
1018          * we check that here and open it.
1019          */
1020
1021         if (mode==MANAGE || mode == BUILD || mode == CREATE || mode == GROW ||
1022             (mode == ASSEMBLE && ! scan)) {
1023                 if (devs_found < 1) {
1024                         fprintf(stderr, Name ": an md device must be given in this mode\n");
1025                         exit(2);
1026                 }
1027                 if ((int)ident.super_minor == -2 && autof) {
1028                         fprintf(stderr, Name ": --super-minor=dev is incompatible with --auto\n");
1029                         exit(2);
1030                 }
1031                 if (mode == MANAGE || mode == GROW) {
1032                         mdfd = open_mddev(devlist->devname, 1);
1033                         if (mdfd < 0)
1034                                 exit(1);
1035                 } else
1036                         /* non-existent device is OK */
1037                         mdfd = open_mddev(devlist->devname, 0);
1038                 if (mdfd == -2) {
1039                         fprintf(stderr, Name ": device %s exists but is not an "
1040                                 "md array.\n", devlist->devname);
1041                         exit(1);
1042                 }
1043                 if ((int)ident.super_minor == -2) {
1044                         struct stat stb;
1045                         if (mdfd < 0) {
1046                                 fprintf(stderr, Name ": --super-minor=dev given, and "
1047                                         "listed device %s doesn't exist.\n",
1048                                         devlist->devname);
1049                                 exit(1);
1050                         }
1051                         fstat(mdfd, &stb);
1052                         ident.super_minor = minor(stb.st_rdev);
1053                 }
1054                 if (mdfd >= 0 && mode != MANAGE && mode != GROW) {
1055                         /* We don't really want this open yet, we just might
1056                          * have wanted to check some things
1057                          */
1058                         close(mdfd);
1059                         mdfd = -1;
1060                 }
1061         }
1062
1063         if (raiddisks) {
1064                 if (raiddisks > max_disks) {
1065                         fprintf(stderr, Name ": invalid number of raid devices: %d\n",
1066                                 raiddisks);
1067                         exit(2);
1068                 }
1069                 if (raiddisks == 1 &&  !force && level != -5) {
1070                         fprintf(stderr, Name ": '1' is an unusual number of drives for an array, so it is probably\n"
1071                                 "     a mistake.  If you really mean it you will need to specify --force before\n"
1072                                 "     setting the number of drives.\n");
1073                         exit(2);
1074                 }
1075         }
1076         if (sparedisks) {
1077                 if ( sparedisks > max_disks - raiddisks) {
1078                         fprintf(stderr, Name ": invalid number of spare-devices: %d\n",
1079                                 sparedisks);
1080                         exit(2);
1081                 }
1082         }
1083
1084         if (homehost == NULL)
1085                 homehost = conf_get_homehost(&require_homehost);
1086         if (homehost == NULL || strcmp(homehost, "<system>")==0) {
1087                 if (gethostname(sys_hostname, sizeof(sys_hostname)) == 0) {
1088                         sys_hostname[sizeof(sys_hostname)-1] = 0;
1089                         homehost = sys_hostname;
1090                 }
1091         }
1092
1093         if ((mode != MISC || devmode != 'E') &&
1094             geteuid() != 0) {
1095                 fprintf(stderr, Name ": must be super-user to perform this action\n");
1096                 exit(1);
1097         }
1098
1099         ident.autof = autof;
1100
1101         rv = 0;
1102         switch(mode) {
1103         case MANAGE:
1104                 /* readonly, add/remove, readwrite, runstop */
1105                 if (readonly>0)
1106                         rv = Manage_ro(devlist->devname, mdfd, readonly);
1107                 if (!rv && devs_found>1)
1108                         rv = Manage_subdevs(devlist->devname, mdfd,
1109                                             devlist->next, verbose-quiet, test);
1110                 if (!rv && readonly < 0)
1111                         rv = Manage_ro(devlist->devname, mdfd, readonly);
1112                 if (!rv && runstop)
1113                         rv = Manage_runstop(devlist->devname, mdfd, runstop, quiet);
1114                 break;
1115         case ASSEMBLE:
1116                 if (devs_found == 1 && ident.uuid_set == 0 &&
1117                     ident.super_minor == UnSet && ident.name[0] == 0 && !scan ) {
1118                         /* Only a device has been given, so get details from config file */
1119                         struct mddev_ident *array_ident = conf_get_ident(devlist->devname);
1120                         if (array_ident == NULL) {
1121                                 fprintf(stderr, Name ": %s not identified in config file.\n",
1122                                         devlist->devname);
1123                                 rv |= 1;
1124                                 if (mdfd >= 0)
1125                                         close(mdfd);
1126                         } else {
1127                                 if (array_ident->autof == 0)
1128                                         array_ident->autof = autof;
1129                                 rv |= Assemble(ss, devlist->devname, array_ident,
1130                                                NULL, backup_file,
1131                                                readonly, runstop, update,
1132                                                homehost, require_homehost,
1133                                                verbose-quiet, force);
1134                         }
1135                 } else if (!scan)
1136                         rv = Assemble(ss, devlist->devname, &ident,
1137                                       devlist->next, backup_file,
1138                                       readonly, runstop, update,
1139                                       homehost, require_homehost,
1140                                       verbose-quiet, force);
1141                 else if (devs_found>0) {
1142                         if (update && devs_found > 1) {
1143                                 fprintf(stderr, Name ": can only update a single array at a time\n");
1144                                 exit(1);
1145                         }
1146                         if (backup_file && devs_found > 1) {
1147                                 fprintf(stderr, Name ": can only assemble a single array when providing a backup file.\n");
1148                                 exit(1);
1149                         }
1150                         for (dv = devlist ; dv ; dv=dv->next) {
1151                                 struct mddev_ident *array_ident = conf_get_ident(dv->devname);
1152                                 if (array_ident == NULL) {
1153                                         fprintf(stderr, Name ": %s not identified in config file.\n",
1154                                                 dv->devname);
1155                                         rv |= 1;
1156                                         continue;
1157                                 }
1158                                 if (array_ident->autof == 0)
1159                                         array_ident->autof = autof;
1160                                 rv |= Assemble(ss, dv->devname, array_ident,
1161                                                NULL, backup_file,
1162                                                readonly, runstop, update,
1163                                                homehost, require_homehost,
1164                                                verbose-quiet, force);
1165                         }
1166                 } else {
1167                         struct mddev_ident *a, *array_list =  conf_get_ident(NULL);
1168                         struct mddev_dev *devlist = conf_get_devs();
1169                         int cnt = 0;
1170                         int failures, successes;
1171                         if (devlist == NULL) {
1172                                 fprintf(stderr, Name ": No devices listed in conf file were found.\n");
1173                                 exit(1);
1174                         }
1175                         if (update) {
1176                                 fprintf(stderr, Name ": --update not meaningful with a --scan assembly.\n");
1177                                 exit(1);
1178                         }
1179                         if (backup_file) {
1180                                 fprintf(stderr, Name ": --backup_file not meaningful with a --scan assembly.\n");
1181                                 exit(1);
1182                         }
1183                         for (a = array_list; a ; a = a->next) {
1184                                 a->assembled = 0;
1185                                 if (a->autof == 0)
1186                                         a->autof = autof;
1187                         }
1188                         do {
1189                                 failures = 0;
1190                                 successes = 0;
1191                                 rv = 0;
1192                                 for (a = array_list; a ; a = a->next) {
1193                                         int r;
1194                                         if (a->assembled)
1195                                                 continue;
1196                                         if (a->devname &&
1197                                             strcasecmp(a->devname, "<ignore>") == 0)
1198                                                 continue;
1199
1200                                         r = Assemble(ss, a->devname,
1201                                                      a,
1202                                                      NULL, NULL,
1203                                                      readonly, runstop, NULL,
1204                                                      homehost, require_homehost,
1205                                                      verbose-quiet, force);
1206                                         if (r == 0) {
1207                                                 a->assembled = 1;
1208                                                 successes++;
1209                                         } else
1210                                                 failures++;
1211                                         rv |= r;
1212                                         cnt++;
1213                                 }
1214                         } while (failures && successes);
1215                         if (homehost && cnt == 0) {
1216                                 /* Maybe we can auto-assemble something.
1217                                  * Repeatedly call Assemble in auto-assemble mode
1218                                  * until it fails
1219                                  */
1220                                 int rv2;
1221                                 int acnt;
1222                                 ident.autof = autof;
1223                                 do {
1224                                         struct mddev_dev *devlist = conf_get_devs();
1225                                         acnt = 0;
1226                                         do {
1227                                                 rv2 = Assemble(ss, NULL,
1228                                                                &ident,
1229                                                                devlist, NULL,
1230                                                                readonly, runstop, NULL,
1231                                                                homehost, require_homehost,
1232                                                                verbose-quiet, force);
1233                                                 if (rv2==0) {
1234                                                         cnt++;
1235                                                         acnt++;
1236                                                 }
1237                                                 if (rv2 == 1)
1238                                                         /* found something so even though assembly failed  we
1239                                                          * want to avoid auto-updates
1240                                                          */
1241                                                         auto_update_home = 0;
1242                                         } while (rv2!=2);
1243                                         /* Incase there are stacked devices, we need to go around again */
1244                                 } while (acnt);
1245 #if 0
1246                                 if (cnt == 0 && auto_update_home && homehost) {
1247                                         /* Nothing found, maybe we need to bootstrap homehost info */
1248                                         do {
1249                                                 acnt = 0;
1250                                                 do {
1251                                                         rv2 = Assemble(ss, NULL,
1252                                                                        &ident,
1253                                                                        NULL, NULL,
1254                                                                        readonly, runstop, "homehost",
1255                                                                        homehost, require_homehost,
1256                                                                        verbose-quiet, force);
1257                                                         if (rv2==0) {
1258                                                                 cnt++;
1259                                                                 acnt++;
1260                                                         }
1261                                                 } while (rv2!=2);
1262                                                 /* Incase there are stacked devices, we need to go around again */
1263                                         } while (acnt);
1264                                 }
1265 #endif
1266                                 if (cnt == 0 && rv == 0) {
1267                                         fprintf(stderr, Name ": No arrays found in config file or automatically\n");
1268                                         rv = 1;
1269                                 } else if (cnt)
1270                                         rv = 0;
1271                         } else if (cnt == 0 && rv == 0) {
1272                                 fprintf(stderr, Name ": No arrays found in config file\n");
1273                                 rv = 1;
1274                         }
1275                 }
1276                 break;
1277         case BUILD:
1278                 if (delay == 0) delay = DEFAULT_BITMAP_DELAY;
1279                 if (write_behind && !bitmap_file) {
1280                         fprintf(stderr, Name ": write-behind mode requires a bitmap.\n");
1281                         rv = 1;
1282                         break;
1283                 }
1284                 if (raiddisks == 0) {
1285                         fprintf(stderr, Name ": no raid-devices specified.\n");
1286                         rv = 1;
1287                         break;
1288                 }
1289
1290                 if (bitmap_file) {
1291                         if (strcmp(bitmap_file, "internal")==0) {
1292                                 fprintf(stderr, Name ": 'internal' bitmaps not supported with --build\n");
1293                                 rv |= 1;
1294                                 break;
1295                         }
1296                 }
1297                 rv = Build(devlist->devname, chunk, level, layout,
1298                            raiddisks, devlist->next, assume_clean,
1299                            bitmap_file, bitmap_chunk, write_behind,
1300                            delay, verbose-quiet, autof, size);
1301                 break;
1302         case CREATE:
1303                 if (delay == 0) delay = DEFAULT_BITMAP_DELAY;
1304                 if (write_behind && !bitmap_file) {
1305                         fprintf(stderr, Name ": write-behind mode requires a bitmap.\n");
1306                         rv = 1;
1307                         break;
1308                 }
1309                 if (raiddisks == 0) {
1310                         fprintf(stderr, Name ": no raid-devices specified.\n");
1311                         rv = 1;
1312                         break;
1313                 }
1314
1315                 rv = Create(ss, devlist->devname, chunk, level, layout, size<0 ? 0 : size,
1316                             raiddisks, sparedisks, ident.name, homehost,
1317                             ident.uuid_set ? ident.uuid : NULL,
1318                             devs_found-1, devlist->next, runstop, verbose-quiet, force, assume_clean,
1319                             bitmap_file, bitmap_chunk, write_behind, delay, autof);
1320                 break;
1321         case MISC:
1322                 if (devmode == 'E') {
1323                         if (devlist == NULL && !scan) {
1324                                 fprintf(stderr, Name ": No devices to examine\n");
1325                                 exit(2);
1326                         }
1327                         if (devlist == NULL)
1328                                 devlist = conf_get_devs();
1329                         if (devlist == NULL) {
1330                                 fprintf(stderr, Name ": No devices listed in %s\n", configfile?configfile:DefaultConfFile);
1331                                 exit(1);
1332                         }
1333                         if (brief && verbose)
1334                                 brief = 2;
1335                         rv = Examine(devlist, scan?(verbose>1?0:verbose+1):brief,
1336                                      export, scan,
1337                                      SparcAdjust, ss, homehost);
1338                 } else if (devmode == DetailPlatform) {
1339                         rv = Detail_Platform(ss ? ss->ss : NULL, ss ? scan : 1, verbose);
1340                 } else {
1341                         if (devlist == NULL) {
1342                                 if ((devmode=='D' || devmode == Waitclean) && scan) {
1343                                         /* apply --detail or --wait-clean to
1344                                          * all devices in /proc/mdstat
1345                                          */
1346                                         struct mdstat_ent *ms = mdstat_read(0, 1);
1347                                         struct mdstat_ent *e;
1348                                         struct map_ent *map = NULL;
1349                                         int members;
1350                                         int v = verbose>1?0:verbose+1;
1351
1352                                         for (members = 0; members <= 1; members++) {
1353                                         for (e=ms ; e ; e=e->next) {
1354                                                 char *name;
1355                                                 struct map_ent *me;
1356                                                 int member = e->metadata_version &&
1357                                                         strncmp(e->metadata_version,
1358                                                                 "external:/", 10) == 0;
1359                                                 if (members != member)
1360                                                         continue;
1361                                                 me = map_by_devnum(&map, e->devnum);
1362                                                 if (me && me->path
1363                                                     && strcmp(me->path, "/unknown") != 0)
1364                                                         name = me->path;
1365                                                 else
1366                                                         name = get_md_name(e->devnum);
1367
1368                                                 if (!name) {
1369                                                         fprintf(stderr, Name ": cannot find device file for %s\n",
1370                                                                 e->dev);
1371                                                         continue;
1372                                                 }
1373                                                 if (devmode == 'D')
1374                                                         rv |= Detail(name, v,
1375                                                                      export, test,
1376                                                                      homehost);
1377                                                 else
1378                                                         rv |= WaitClean(name, -1, v);
1379                                                 put_md_name(name);
1380                                         }
1381                                         }
1382                                         free_mdstat(ms);
1383                                 } else  if (devmode == 'S' && scan) {
1384                                         /* apply --stop to all devices in /proc/mdstat */
1385                                         /* Due to possible stacking of devices, repeat until
1386                                          * nothing more can be stopped
1387                                          */
1388                                         int progress=1, err;
1389                                         int last = 0;
1390                                         do {
1391                                                 struct mdstat_ent *ms = mdstat_read(0, 0);
1392                                                 struct mdstat_ent *e;
1393
1394                                                 if (!progress) last = 1;
1395                                                 progress = 0; err = 0;
1396                                                 for (e=ms ; e ; e=e->next) {
1397                                                         char *name = get_md_name(e->devnum);
1398
1399                                                         if (!name) {
1400                                                                 fprintf(stderr, Name ": cannot find device file for %s\n",
1401                                                                         e->dev);
1402                                                                 continue;
1403                                                         }
1404                                                         mdfd = open_mddev(name, 1);
1405                                                         if (mdfd >= 0) {
1406                                                                 if (Manage_runstop(name, mdfd, -1, quiet?1:last?0:-1))
1407                                                                         err = 1;
1408                                                                 else
1409                                                                         progress = 1;
1410                                                                 close(mdfd);
1411                                                         }
1412
1413                                                         put_md_name(name);
1414                                                 }
1415                                                 free_mdstat(ms);
1416                                         } while (!last && err);
1417                                         if (err) rv |= 1;
1418                                 } else {
1419                                         fprintf(stderr, Name ": No devices given.\n");
1420                                         exit(2);
1421                                 }
1422                         }
1423                         for (dv=devlist ; dv; dv=dv->next) {
1424                                 switch(dv->disposition) {
1425                                 case 'D':
1426                                         rv |= Detail(dv->devname,
1427                                                      brief?1+verbose:0,
1428                                                      export, test, homehost);
1429                                         continue;
1430                                 case 'K': /* Zero superblock */
1431                                         if (ss)
1432                                                 rv |= Kill(dv->devname, ss, force, quiet,0);
1433                                         else {
1434                                                 int q = quiet;
1435                                                 do {
1436                                                         rv |= Kill(dv->devname, NULL, force, q, 0);
1437                                                         q = 1;
1438                                                 } while (rv == 0);
1439                                                 rv &= ~2;
1440                                         }
1441                                         continue;
1442                                 case 'Q':
1443                                         rv |= Query(dv->devname); continue;
1444                                 case 'X':
1445                                         rv |= ExamineBitmap(dv->devname, brief, ss); continue;
1446                                 case 'W':
1447                                         rv |= Wait(dv->devname); continue;
1448                                 case Waitclean:
1449                                         rv |= WaitClean(dv->devname, -1, verbose-quiet); continue;
1450                                 case KillSubarray:
1451                                         rv |= Kill_subarray(dv->devname, subarray, quiet);
1452                                         continue;
1453                                 case UpdateSubarray:
1454                                         if (update == NULL) {
1455                                                 fprintf(stderr,
1456                                                         Name ": -U/--update must be specified with --update-subarray\n");
1457                                                 rv |= 1;
1458                                                 continue;
1459                                         }
1460                                         rv |= Update_subarray(dv->devname, subarray, update, &ident, quiet);
1461                                         continue;
1462                                 }
1463                                 mdfd = open_mddev(dv->devname, 1);
1464                                 if (mdfd>=0) {
1465                                         switch(dv->disposition) {
1466                                         case 'R':
1467                                                 rv |= Manage_runstop(dv->devname, mdfd, 1, quiet); break;
1468                                         case 'S':
1469                                                 rv |= Manage_runstop(dv->devname, mdfd, -1, quiet); break;
1470                                         case 'o':
1471                                                 rv |= Manage_ro(dv->devname, mdfd, 1); break;
1472                                         case 'w':
1473                                                 rv |= Manage_ro(dv->devname, mdfd, -1); break;
1474                                         }
1475                                         close(mdfd);
1476                                 } else
1477                                         rv |= 1;
1478                         }
1479                 }
1480                 break;
1481         case MONITOR:
1482                 if (!devlist && !scan) {
1483                         fprintf(stderr, Name ": Cannot monitor: need --scan or at least one device\n");
1484                         rv = 1;
1485                         break;
1486                 }
1487                 if (pidfile && !daemonise) {
1488                         fprintf(stderr, Name ": Cannot write a pid file when not in daemon mode\n");
1489                         rv = 1;
1490                         break;
1491                 }
1492                 if (delay == 0) {
1493                         if (get_linux_version() > 2006016)
1494                                 /* mdstat responds to poll */
1495                                 delay = 1000;
1496                         else
1497                                 delay = 60;
1498                 }
1499                 rv= Monitor(devlist, mailaddr, program,
1500                             delay?delay:60, daemonise, scan, oneshot,
1501                             dosyslog, test, pidfile, increments, spare_sharing);
1502                 break;
1503
1504         case GROW:
1505                 if (array_size >= 0) {
1506                         /* alway impose array size first, independent of
1507                          * anything else
1508                          * Do not allow level or raid_disks changes at the
1509                          * same time as that can be irreversibly destructive.
1510                          */
1511                         struct mdinfo sra;
1512                         int err;
1513                         if (raiddisks || level != UnSet) {
1514                                 fprintf(stderr, Name ": cannot change array size in same operation "
1515                                         "as changing raiddisks or level.\n"
1516                                         "    Change size first, then check that data is still intact.\n");
1517                                 rv = 1;
1518                                 break;
1519                         }
1520                         sysfs_init(&sra, mdfd, 0);
1521                         if (array_size == 0)
1522                                 err = sysfs_set_str(&sra, NULL, "array_size", "default");
1523                         else
1524                                 err = sysfs_set_num(&sra, NULL, "array_size", array_size / 2);
1525                         if (err < 0) {
1526                                 if (errno == E2BIG)
1527                                         fprintf(stderr, Name ": --array-size setting"
1528                                                 " is too large.\n");
1529                                 else
1530                                         fprintf(stderr, Name ": current kernel does"
1531                                                 " not support setting --array-size\n");
1532                                 rv = 1;
1533                                 break;
1534                         }
1535                 }
1536                 if (devs_found > 1) {
1537
1538                         /* must be '-a'. */
1539                         if (size >= 0 || raiddisks || chunk || layout_str != NULL || bitmap_file) {
1540                                 fprintf(stderr, Name ": --add cannot be used with other geometry changes in --grow mode\n");
1541                                 rv = 1;
1542                                 break;
1543                         }
1544                         for (dv=devlist->next; dv ; dv=dv->next) {
1545                                 rv = Grow_Add_device(devlist->devname, mdfd, dv->devname);
1546                                 if (rv)
1547                                         break;
1548                         }
1549                 } else if (bitmap_file) {
1550                         if (size >= 0 || raiddisks || chunk || layout_str != NULL) {
1551                                 fprintf(stderr, Name ": --bitmap changes cannot be used with other geometry changes in --grow mode\n");
1552                                 rv = 1;
1553                                 break;
1554                         }
1555                         if (delay == 0)
1556                                 delay = DEFAULT_BITMAP_DELAY;
1557                         rv = Grow_addbitmap(devlist->devname, mdfd, bitmap_file,
1558                                             bitmap_chunk, delay, write_behind, force);
1559                 } else if (size >= 0 || raiddisks != 0 || layout_str != NULL
1560                            || chunk != 0 || level != UnSet) {
1561                         rv = Grow_reshape(devlist->devname, mdfd, quiet, backup_file,
1562                                           size, level, layout_str, chunk, raiddisks);
1563                 } else if (array_size < 0)
1564                         fprintf(stderr, Name ": no changes to --grow\n");
1565                 break;
1566         case INCREMENTAL:
1567                 if (rebuild_map) {
1568                         RebuildMap();
1569                 }
1570                 if (scan) {
1571                         if (runstop <= 0) {
1572                                 fprintf(stderr, Name
1573                          ": --incremental --scan meaningless without --run.\n");
1574                                 break;
1575                         }
1576                         if (devmode == 'f') {
1577                                 fprintf(stderr, Name
1578                          ": --incremental --scan --fail not supported.\n");
1579                                 break;
1580                         }
1581                         rv = IncrementalScan(verbose);
1582                 }
1583                 if (!devlist) {
1584                         if (!rebuild_map && !scan) {
1585                                 fprintf(stderr, Name
1586                                         ": --incremental requires a device.\n");
1587                                 rv = 1;
1588                         }
1589                         break;
1590                 }
1591                 if (devlist->next) {
1592                         fprintf(stderr, Name
1593                                ": --incremental can only handle one device.\n");
1594                         rv = 1;
1595                         break;
1596                 }
1597                 if (devmode == 'f')
1598                         rv = IncrementalRemove(devlist->devname, remove_path,
1599                                                verbose-quiet);
1600                 else
1601                         rv = Incremental(devlist->devname, verbose-quiet,
1602                                          runstop, ss, homehost,
1603                                          require_homehost, autof);
1604                 break;
1605         case AUTODETECT:
1606                 autodetect();
1607                 break;
1608         }
1609         exit(rv);
1610 }