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