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