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_s ident;
  52         char *configfile = NULL;
  53         char *cp;
  54         char *update = NULL;
  55         int scan = 0;
  56         char devmode = 0;
  57         int runstop = 0;
  58         int readonly = 0;
  59         int write_behind = 0;
  60         int bitmap_fd = -1;
  61         char *bitmap_file = NULL;
  62         char *backup_file = NULL;
  63         int bitmap_chunk = UnSet;
  64         int SparcAdjust = 0;
  65         mddev_dev_t devlist = NULL;
  66         mddev_dev_t *devlistend = & devlist;
  67         mddev_dev_t 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         struct supertype *ss = NULL;
 100         int writemostly = 0;
 101         int re_add = 0;
 102         char *shortopt = short_options;
 103         int dosyslog = 0;
 104         int rebuild_map = 0;
 105         int auto_update_home = 0;
 106
 107         int print_help = 0;
 108         FILE *outf;
 109
 110         int mdfd = -1;
 111
 112         srandom(time(0) ^ getpid());
 113
 114         ident.uuid_set=0;
 115         ident.level = UnSet;
 116         ident.raid_disks = UnSet;
 117         ident.super_minor= UnSet;
 118         ident.devices=0;
 119         ident.spare_group = NULL;
 120         ident.autof = 0;
 121         ident.st = NULL;
 122         ident.bitmap_fd = -1;
 123         ident.bitmap_file = NULL;
 124         ident.name[0] = 0;
 125         ident.container = NULL;
 126         ident.member = NULL;
 127
 128         while ((option_index = -1) ,
 129                (opt=getopt_long(argc, argv,
 130                                 shortopt, long_options,
 131                                 &option_index)) != -1) {
 132                 int newmode = mode;
 133                 /* firstly, some mode-independent options */
 134                 switch(opt) {
 135                 case 'h':
 136                         if (option_index > 0 &&
 137                             strcmp(long_options[option_index].name, "help-options")==0)
 138                                 print_help = 2;
 139                         else
 140                                 print_help = 1;
 141                         continue;
 142
 143                 case 'V':
 144                         fputs(Version, stderr);
 145                         exit(0);
 146
 147                 case 'v': verbose++;
 148                         continue;
 149
 150                 case 'q': quiet++;
 151                         continue;
 152
 153                 case 'b':
 154                         if (mode == ASSEMBLE || mode == BUILD || mode == CREATE || mode == GROW ||
 155                             mode == INCREMENTAL || mode == MANAGE)
 156                                 break; /* b means bitmap */
 157                         brief = 1;
 158                         continue;
 159
 160                 case 'Y': export++;
 161                         continue;
 162
 163                 case HomeHost:
 164                         if (strcasecmp(optarg, "<ignore>") == 0)
 165                                 require_homehost = 0;
 166                         else
 167                                 homehost = optarg;
 168                         continue;
 169
 170                 case ':':
 171                 case '?':
 172                         fputs(Usage, stderr);
 173                         exit(2);
 174                 }
 175                 /* second, figure out the mode.
 176                  * Some options force the mode.  Others
 177                  * set the mode if it isn't already
 178                  */
 179
 180                 switch(opt) {
 181                 case '@': /* just incase they say --manage */
 182                         newmode = MANAGE;
 183                         shortopt = short_bitmap_options;
 184                         break;
 185                 case 'a':
 186                 case 'r':
 187                 case 'f':
 188                 case ReAdd: /* re-add */
 189                         if (!mode) {
 190                                 newmode = MANAGE;
 191                                 shortopt = short_bitmap_options;
 192                         }
 193                         break;
 194
 195                 case 'A': newmode = ASSEMBLE; shortopt = short_bitmap_auto_options; break;
 196                 case 'B': newmode = BUILD; shortopt = short_bitmap_auto_options; break;
 197                 case 'C': newmode = CREATE; shortopt = short_bitmap_auto_options; break;
 198                 case 'F': newmode = MONITOR;break;
 199                 case 'G': newmode = GROW;
 200                         shortopt = short_bitmap_options;
 201                         break;
 202                 case 'I': newmode = INCREMENTAL;
 203                         shortopt = short_bitmap_auto_options; break;
 204                 case AutoDetect:
 205                         newmode = AUTODETECT; break;
 206
 207                 case '#':
 208                 case 'D':
 209                 case 'E':
 210                 case 'X':
 211                 case 'Q': newmode = MISC; break;
 212                 case 'R':
 213                 case 'S':
 214                 case 'o':
 215                 case 'w':
 216                 case 'W':
 217                 case Waitclean:
 218                 case DetailPlatform:
 219                 case 'K': if (!mode) newmode = MISC; break;
 220                 }
 221                 if (mode && newmode == mode) {
 222                         /* everybody happy ! */
 223                 } else if (mode && newmode != mode) {
 224                         /* not allowed.. */
 225                         fprintf(stderr, Name ": ");
 226                         if (option_index >= 0)
 227                                 fprintf(stderr, "--%s", long_options[option_index].name);
 228                         else
 229                                 fprintf(stderr, "-%c", opt);
 230                         fprintf(stderr, " would set mdadm mode to \"%s\", but it is already set to \"%s\".\n",
 231                                 map_num(modes, newmode),
 232                                 map_num(modes, mode));
 233                         exit(2);
 234                 } else if (!mode && newmode) {
 235                         mode = newmode;
 236                 } else {
 237                         /* special case of -c --help */
 238                         if (opt == 'c' &&
 239                             ( strncmp(optarg, "--h", 3)==0 ||
 240                               strncmp(optarg, "-h", 2)==0)) {
 241                                 fputs(Help_config, stdout);
 242                                 exit(0);
 243                         }
 244
 245                         /* If first option is a device, don't force the mode yet */
 246                         if (opt == 1) {
 247                                 if (devs_found == 0) {
 248                                         dv = malloc(sizeof(*dv));
 249                                         if (dv == NULL) {
 250                                                 fprintf(stderr, Name ": malloc failed\n");
 251                                                 exit(3);
 252                                         }
 253                                         dv->devname = optarg;
 254                                         dv->disposition = devmode;
 255                                         dv->writemostly = writemostly;
 256                                         dv->re_add = re_add;
 257                                         dv->used = 0;
 258                                         dv->content = NULL;
 259                                         dv->next = NULL;
 260                                         *devlistend = dv;
 261                                         devlistend = &dv->next;
 262
 263                                         devs_found++;
 264                                         continue;
 265                                 }
 266                                 /* No mode yet, and this is the second device ... */
 267                                 fprintf(stderr, Name ": An option must be given to set the mode before a second device\n"
 268                                         "       (%s) is listed\n", optarg);
 269                                 exit(2);
 270                         }
 271                         if (option_index >= 0)
 272                                 fprintf(stderr, Name ": --%s", long_options[option_index].name);
 273                         else
 274                                 fprintf(stderr, Name ": -%c", opt);
 275                         fprintf(stderr, " does not set the mode, and so cannot be the first option.\n");
 276                         exit(2);
 277                 }
 278
 279                 /* if we just set the mode, then done */
 280                 switch(opt) {
 281                 case '@':
 282                 case '#':
 283                 case 'A':
 284                 case 'B':
 285                 case 'C':
 286                 case 'F':
 287                 case 'G':
 288                 case 'I':
 289                 case AutoDetect:
 290                         continue;
 291                 }
 292                 if (opt == 1) {
 293                         /* an undecorated option - must be a device name.
 294                          */
 295                         if (devs_found > 0 && mode == '@' && !devmode) {
 296                                 fprintf(stderr, Name ": Must give one of -a/-r/-f for subsequent devices at %s\n", optarg);
 297                                 exit(2);
 298                         }
 299                         if (devs_found > 0 && mode == 'G' && !devmode) {
 300                                 fprintf(stderr, Name ": Must give one of -a for devices do add: %s\n", optarg);
 301                                 exit(2);
 302                         }
 303                         dv = malloc(sizeof(*dv));
 304                         if (dv == NULL) {
 305                                 fprintf(stderr, Name ": malloc failed\n");
 306                                 exit(3);
 307                         }
 308                         dv->devname = optarg;
 309                         dv->disposition = devmode;
 310                         dv->writemostly = writemostly;
 311                         dv->re_add = re_add;
 312                         dv->used = 0;
 313                         dv->content = NULL;
 314                         dv->next = NULL;
 315                         *devlistend = dv;
 316                         devlistend = &dv->next;
 317
 318                         devs_found++;
 319                         continue;
 320                 }
 321
 322                 /* We've got a mode, and opt is now something else which
 323                  * could depend on the mode */
 324 #define O(a,b) ((a<<8)|b)
 325                 switch (O(mode,opt)) {
 326                 case O(GROW,'c'):
 327                 case O(CREATE,'c'):
 328                 case O(BUILD,'c'): /* chunk or rounding */
 329                         if (chunk) {
 330                                 fprintf(stderr, Name ": chunk/rounding may only be specified once. "
 331                                         "Second value is %s.\n", optarg);
 332                                 exit(2);
 333                         }
 334                         chunk = strtol(optarg, &c, 10);
 335                         if (!optarg[0] || *c || chunk<4 || ((chunk-1)&chunk)) {
 336                                 fprintf(stderr, Name ": invalid chunk/rounding value: %s\n",
 337                                         optarg);
 338                                 exit(2);
 339                         }
 340                         continue;
 341
 342 #if 0
 343                 case O(ASSEMBLE,AutoHomeHost):
 344                         auto_update_home = 1;
 345                         continue;
 346 #endif
 347                 case O(INCREMENTAL, 'e'):
 348                 case O(CREATE,'e'):
 349                 case O(ASSEMBLE,'e'):
 350                 case O(MISC,'e'): /* set metadata (superblock) information */
 351                         if (ss) {
 352                                 fprintf(stderr, Name ": metadata information already given\n");
 353                                 exit(2);
 354                         }
 355                         for(i=0; !ss && superlist[i]; i++)
 356                                 ss = superlist[i]->match_metadata_desc(optarg);
 357
 358                         if (!ss) {
 359                                 fprintf(stderr, Name ": unrecognised metadata identifier: %s\n", optarg);
 360                                 exit(2);
 361                         }
 362                         max_disks = ss->max_devs;
 363                         continue;
 364
 365                 case O(MANAGE,'W'):
 366                 case O(BUILD,'W'):
 367                 case O(CREATE,'W'):
 368                         /* set write-mostly for following devices */
 369                         writemostly = 1;
 370                         continue;
 371
 372                 case O(MANAGE,'w'):
 373                         /* clear write-mostly for following devices */
 374                         writemostly = 2;
 375                         continue;
 376
 377
 378                 case O(GROW,'z'):
 379                 case O(CREATE,'z'):
 380                 case O(BUILD,'z'): /* size */
 381                         if (size >= 0) {
 382                                 fprintf(stderr, Name ": size may only be specified once. "
 383                                         "Second value is %s.\n", optarg);
 384                                 exit(2);
 385                         }
 386                         if (strcmp(optarg, "max")==0)
 387                                 size = 0;
 388                         else {
 389                                 size = parse_size(optarg);
 390                                 if (size < 8) {
 391                                         fprintf(stderr, Name ": invalid size: %s\n",
 392                                                 optarg);
 393                                         exit(2);
 394                                 }
 395                                 /* convert sectors to K */
 396                                 size /= 2;
 397                         }
 398                         continue;
 399
 400                 case O(GROW,'Z'): /* array size */
 401                         if (array_size >= 0) {
 402                                 fprintf(stderr, Name ": array-size may only be specified once. "
 403                                         "Second value is %s.\n", optarg);
 404                                 exit(2);
 405                         }
 406                         if (strcmp(optarg, "max") == 0)
 407                                 array_size = 0;
 408                         else {
 409                                 array_size = parse_size(optarg);
 410                                 if (array_size <= 0) {
 411                                         fprintf(stderr, Name ": invalid array size: %s\n",
 412                                                 optarg);
 413                                         exit(2);
 414                                 }
 415                         }
 416                         continue;
 417
 418                 case O(GROW,'l'):
 419                 case O(CREATE,'l'):
 420                 case O(BUILD,'l'): /* set raid level*/
 421                         if (level != UnSet) {
 422                                 fprintf(stderr, Name ": raid level may only be set once.  "
 423                                         "Second value is %s.\n", optarg);
 424                                 exit(2);
 425                         }
 426                         level = map_name(pers, optarg);
 427                         if (level == UnSet) {
 428                                 fprintf(stderr, Name ": invalid raid level: %s\n",
 429                                         optarg);
 430                                 exit(2);
 431                         }
 432                         if (level != 0 && level != LEVEL_LINEAR && level != 1 &&
 433                             level != LEVEL_MULTIPATH && level != LEVEL_FAULTY &&
 434                             level != 10 &&
 435                             mode == BUILD) {
 436                                 fprintf(stderr, Name ": Raid level %s not permitted with --build.\n",
 437                                         optarg);
 438                                 exit(2);
 439                         }
 440                         if (sparedisks > 0 && level < 1 && level >= -1) {
 441                                 fprintf(stderr, Name ": raid level %s is incompatible with spare-devices setting.\n",
 442                                         optarg);
 443                                 exit(2);
 444                         }
 445                         ident.level = level;
 446                         continue;
 447
 448                 case O(GROW, 'p'): /* new layout */
 449                         if (layout_str) {
 450                                 fprintf(stderr,Name ": layout may only be sent once.  "
 451                                         "Second value was %s\n", optarg);
 452                                 exit(2);
 453                         }
 454                         layout_str = optarg;
 455                         /* 'Grow' will parse the value */
 456                         continue;
 457
 458                 case O(CREATE,'p'): /* raid5 layout */
 459                 case O(BUILD,'p'): /* faulty layout */
 460                         if (layout != UnSet) {
 461                                 fprintf(stderr,Name ": layout may only be sent once.  "
 462                                         "Second value was %s\n", optarg);
 463                                 exit(2);
 464                         }
 465                         switch(level) {
 466                         default:
 467                                 fprintf(stderr, Name ": layout not meaningful for %s arrays.\n",
 468                                         map_num(pers, level));
 469                                 exit(2);
 470                         case UnSet:
 471                                 fprintf(stderr, Name ": raid level must be given before layout.\n");
 472                                 exit(2);
 473
 474                         case 5:
 475                                 layout = map_name(r5layout, optarg);
 476                                 if (layout==UnSet) {
 477                                         fprintf(stderr, Name ": layout %s not understood for raid5.\n",
 478                                                 optarg);
 479                                         exit(2);
 480                                 }
 481                                 break;
 482                         case 6:
 483                                 layout = map_name(r6layout, optarg);
 484                                 if (layout==UnSet) {
 485                                         fprintf(stderr, Name ": layout %s not understood for raid6.\n",
 486                                                 optarg);
 487                                         exit(2);
 488                                 }
 489                                 break;
 490
 491                         case 10:
 492                                 layout = parse_layout_10(optarg);
 493                                 if (layout < 0) {
 494                                         fprintf(stderr, Name ": layout for raid10 must be 'nNN', 'oNN' or 'fNN' where NN is a number, not %s\n", optarg);
 495                                         exit(2);
 496                                 }
 497                                 break;
 498                         case LEVEL_FAULTY:
 499                                 /* Faulty
 500                                  * modeNNN
 501                                  */
 502                                 layout = parse_layout_faulty(optarg);
 503                                 if (layout == -1) {
 504                                         fprintf(stderr, Name ": layout %s not understood for faulty.\n",
 505                                                 optarg);
 506                                         exit(2);
 507                                 }
 508                                 break;
 509                         }
 510                         continue;
 511
 512                 case O(CREATE,AssumeClean):
 513                 case O(BUILD,AssumeClean): /* assume clean */
 514                         assume_clean = 1;
 515                         continue;
 516
 517                 case O(GROW,'n'):
 518                 case O(CREATE,'n'):
 519                 case O(BUILD,'n'): /* number of raid disks */
 520                         if (raiddisks) {
 521                                 fprintf(stderr, Name ": raid-devices set twice: %d and %s\n",
 522                                         raiddisks, optarg);
 523                                 exit(2);
 524                         }
 525                         raiddisks = strtol(optarg, &c, 10);
 526                         if (!optarg[0] || *c || raiddisks<=0) {
 527                                 fprintf(stderr, Name ": invalid number of raid devices: %s\n",
 528                                         optarg);
 529                                 exit(2);
 530                         }
 531                         ident.raid_disks = raiddisks;
 532                         continue;
 533
 534                 case O(CREATE,'x'): /* number of spare (eXtra) discs */
 535                         if (sparedisks) {
 536                                 fprintf(stderr,Name ": spare-devices set twice: %d and %s\n",
 537                                         sparedisks, optarg);
 538                                 exit(2);
 539                         }
 540                         if (level != UnSet && level <= 0 && level >= -1) {
 541                                 fprintf(stderr, Name ": spare-devices setting is incompatible with raid level %d\n",
 542                                         level);
 543                                 exit(2);
 544                         }
 545                         sparedisks = strtol(optarg, &c, 10);
 546                         if (!optarg[0] || *c || sparedisks < 0) {
 547                                 fprintf(stderr, Name ": invalid number of spare-devices: %s\n",
 548                                         optarg);
 549                                 exit(2);
 550                         }
 551                         continue;
 552
 553                 case O(CREATE,'a'):
 554                 case O(BUILD,'a'):
 555                 case O(INCREMENTAL,'a'):
 556                 case O(ASSEMBLE,'a'): /* auto-creation of device node */
 557                         autof = parse_auto(optarg, "--auto flag", 0);
 558                         continue;
 559
 560                 case O(CREATE,Symlinks):
 561                 case O(BUILD,Symlinks):
 562                 case O(ASSEMBLE,Symlinks): /* auto creation of symlinks in /dev to /dev/md */
 563                         symlinks = optarg;
 564                         continue;
 565
 566                 case O(BUILD,'f'): /* force honouring '-n 1' */
 567                 case O(GROW,'f'): /* ditto */
 568                 case O(CREATE,'f'): /* force honouring of device list */
 569                 case O(ASSEMBLE,'f'): /* force assembly */
 570                 case O(MISC,'f'): /* force zero */
 571                         force=1;
 572                         continue;
 573
 574                         /* now for the Assemble options */
 575                 case O(CREATE,'u'): /* uuid of array */
 576                 case O(ASSEMBLE,'u'): /* uuid of array */
 577                         if (ident.uuid_set) {
 578                                 fprintf(stderr, Name ": uuid cannot be set twice.  "
 579                                         "Second value %s.\n", optarg);
 580                                 exit(2);
 581                         }
 582                         if (parse_uuid(optarg, ident.uuid))
 583                                 ident.uuid_set = 1;
 584                         else {
 585                                 fprintf(stderr,Name ": Bad uuid: %s\n", optarg);
 586                                 exit(2);
 587                         }
 588                         continue;
 589
 590                 case O(CREATE,'N'):
 591                 case O(ASSEMBLE,'N'):
 592                         if (ident.name[0]) {
 593                                 fprintf(stderr, Name ": name cannot be set twice.   "
 594                                         "Second value %s.\n", optarg);
 595                                 exit(2);
 596                         }
 597                         if (strlen(optarg) > 32) {
 598                                 fprintf(stderr, Name ": name '%s' is too long, 32 chars max.\n",
 599                                         optarg);
 600                                 exit(2);
 601                         }
 602                         strcpy(ident.name, optarg);
 603                         continue;
 604
 605                 case O(ASSEMBLE,'m'): /* super-minor for array */
 606                         if (ident.super_minor != UnSet) {
 607                                 fprintf(stderr, Name ": super-minor cannot be set twice.  "
 608                                         "Second value: %s.\n", optarg);
 609                                 exit(2);
 610                         }
 611                         if (strcmp(optarg, "dev")==0)
 612                                 ident.super_minor = -2;
 613                         else {
 614                                 ident.super_minor = strtoul(optarg, &cp, 10);
 615                                 if (!optarg[0] || *cp) {
 616                                         fprintf(stderr, Name ": Bad super-minor number: %s.\n", optarg);
 617                                         exit(2);
 618                                 }
 619                         }
 620                         continue;
 621
 622                 case O(ASSEMBLE,'U'): /* update the superblock */
 623                         if (update) {
 624                                 fprintf(stderr, Name ": Can only update one aspect of superblock, both %s and %s given.\n",
 625                                         update, optarg);
 626                                 exit(2);
 627                         }
 628                         update = optarg;
 629                         if (strcmp(update, "sparc2.2")==0)
 630                                 continue;
 631                         if (strcmp(update, "super-minor") == 0)
 632                                 continue;
 633                         if (strcmp(update, "summaries")==0)
 634                                 continue;
 635                         if (strcmp(update, "resync")==0)
 636                                 continue;
 637                         if (strcmp(update, "uuid")==0)
 638                                 continue;
 639                         if (strcmp(update, "name")==0)
 640                                 continue;
 641                         if (strcmp(update, "homehost")==0)
 642                                 continue;
 643                         if (strcmp(update, "devicesize")==0)
 644                                 continue;
 645                         if (strcmp(update, "byteorder")==0) {
 646                                 if (ss) {
 647                                         fprintf(stderr, Name ": must not set metadata type with --update=byteorder.\n");
 648                                         exit(2);
 649                                 }
 650                                 for(i=0; !ss && superlist[i]; i++)
 651                                         ss = superlist[i]->match_metadata_desc("0.swap");
 652                                 if (!ss) {
 653                                         fprintf(stderr, Name ": INTERNAL ERROR cannot find 0.swap\n");
 654                                         exit(2);
 655                                 }
 656
 657                                 continue;
 658                         }
 659                         if (strcmp(update,"?") == 0 ||
 660                             strcmp(update, "help") == 0) {
 661                                 outf = stdout;
 662                                 fprintf(outf, Name ": ");
 663                         } else {
 664                                 outf = stderr;
 665                                 fprintf(outf,
 666                                         Name ": '--update=%s' is invalid.  ",
 667                                         update);
 668                         }
 669                         fprintf(outf, "Valid --update options are:\n"
 670                 "     'sparc2.2', 'super-minor', 'uuid', 'name', 'resync',\n"
 671                 "     'summaries', 'homehost', 'byteorder', 'devicesize'.\n");
 672                         exit(outf == stdout ? 0 : 2);
 673
 674                 case O(ASSEMBLE,NoDegraded): /* --no-degraded */
 675                         runstop = -1; /* --stop isn't allowed for --assemble,
 676                                        * so we overload slightly */
 677                         continue;
 678
 679                 case O(ASSEMBLE,'c'): /* config file */
 680                 case O(INCREMENTAL, 'c'):
 681                 case O(MISC, 'c'):
 682                 case O(MONITOR,'c'):
 683                         if (configfile) {
 684                                 fprintf(stderr, Name ": configfile cannot be set twice.  "
 685                                         "Second value is %s.\n", optarg);
 686                                 exit(2);
 687                         }
 688                         configfile = optarg;
 689                         set_conffile(configfile);
 690                         /* FIXME possibly check that config file exists.  Even parse it */
 691                         continue;
 692                 case O(ASSEMBLE,'s'): /* scan */
 693                 case O(MISC,'s'):
 694                 case O(MONITOR,'s'):
 695                 case O(INCREMENTAL,'s'):
 696                         scan = 1;
 697                         continue;
 698
 699                 case O(MONITOR,'m'): /* mail address */
 700                         if (mailaddr)
 701                                 fprintf(stderr, Name ": only specify one mailaddress. %s ignored.\n",
 702                                         optarg);
 703                         else
 704                                 mailaddr = optarg;
 705                         continue;
 706
 707                 case O(MONITOR,'p'): /* alert program */
 708                         if (program)
 709                                 fprintf(stderr, Name ": only specify one alter program. %s ignored.\n",
 710                                         optarg);
 711                         else
 712                                 program = optarg;
 713                         continue;
 714
 715                 case O(MONITOR,'r'): /* rebuild increments */
 716                         increments = atoi(optarg);
 717                         if (increments>99 || increments<1) {
 718                                 fprintf(stderr, Name ": please specify positive integer between 1 and 99 as rebuild increments.\n");
 719                                 exit(2);
 720                         }
 721                         continue;
 722
 723                 case O(MONITOR,'d'): /* delay in seconds */
 724                 case O(GROW, 'd'):
 725                 case O(BUILD,'d'): /* delay for bitmap updates */
 726                 case O(CREATE,'d'):
 727                         if (delay)
 728                                 fprintf(stderr, Name ": only specify delay once. %s ignored.\n",
 729                                         optarg);
 730                         else {
 731                                 delay = strtol(optarg, &c, 10);
 732                                 if (!optarg[0] || *c || delay<1) {
 733                                         fprintf(stderr, Name ": invalid delay: %s\n",
 734                                                 optarg);
 735                                         exit(2);
 736                                 }
 737                         }
 738                         continue;
 739                 case O(MONITOR,'f'): /* daemonise */
 740                         daemonise = 1;
 741                         continue;
 742                 case O(MONITOR,'i'): /* pid */
 743                         if (pidfile)
 744                                 fprintf(stderr, Name ": only specify one pid file. %s ignored.\n",
 745                                         optarg);
 746                         else
 747                                 pidfile = optarg;
 748                         continue;
 749                 case O(MONITOR,'1'): /* oneshot */
 750                         oneshot = 1;
 751                         continue;
 752                 case O(MONITOR,'t'): /* test */
 753                         test = 1;
 754                         continue;
 755                 case O(MONITOR,'y'): /* log messages to syslog */
 756                         openlog("mdadm", LOG_PID, SYSLOG_FACILITY);
 757                         dosyslog = 1;
 758                         continue;
 759
 760                         /* now the general management options.  Some are applicable
 761                          * to other modes. None have arguments.
 762                          */
 763                 case O(GROW,'a'):
 764                 case O(MANAGE,'a'): /* add a drive */
 765                         devmode = 'a';
 766                         re_add = 0;
 767                         continue;
 768                 case O(MANAGE,ReAdd):
 769                         devmode = 'a';
 770                         re_add = 1;
 771                         continue;
 772                 case O(MANAGE,'r'): /* remove a drive */
 773                         devmode = 'r';
 774                         continue;
 775                 case O(MANAGE,'f'): /* set faulty */
 776                 case O(INCREMENTAL,'f'): /* r for incremental is taken, use f
 777                                           * even though we will both fail and
 778                                           * remove the device */
 779                         devmode = 'f';
 780                         continue;
 781                 case O(INCREMENTAL,'R'):
 782                 case O(MANAGE,'R'):
 783                 case O(ASSEMBLE,'R'):
 784                 case O(BUILD,'R'):
 785                 case O(CREATE,'R'): /* Run the array */
 786                         if (runstop < 0) {
 787                                 fprintf(stderr, Name ": Cannot both Stop and Run an array\n");
 788                                 exit(2);
 789                         }
 790                         runstop = 1;
 791                         continue;
 792                 case O(MANAGE,'S'):
 793                         if (runstop > 0) {
 794                                 fprintf(stderr, Name ": Cannot both Run and Stop an array\n");
 795                                 exit(2);
 796                         }
 797                         runstop = -1;
 798                         continue;
 799                 case O(MANAGE,'t'):
 800                         test = 1;
 801                         continue;
 802
 803                 case O(MISC,'Q'):
 804                 case O(MISC,'D'):
 805                 case O(MISC,'E'):
 806                 case O(MISC,'K'):
 807                 case O(MISC,'R'):
 808                 case O(MISC,'S'):
 809                 case O(MISC,'X'):
 810                 case O(MISC,'o'):
 811                 case O(MISC,'w'):
 812                 case O(MISC,'W'):
 813                 case O(MISC, Waitclean):
 814                 case O(MISC, DetailPlatform):
 815                         if (devmode && devmode != opt &&
 816                             (devmode == 'E' || (opt == 'E' && devmode != 'Q'))) {
 817                                 fprintf(stderr, Name ": --examine/-E cannot be given with -%c\n",
 818                                         devmode =='E'?opt:devmode);
 819                                 exit(2);
 820                         }
 821                         devmode = opt;
 822                         continue;
 823                 case O(MISC,'t'):
 824                         test = 1;
 825                         continue;
 826
 827                 case O(MISC, Sparc22):
 828                         if (devmode != 'E') {
 829                                 fprintf(stderr, Name ": --sparc2.2 only allowed with --examine\n");
 830                                 exit(2);
 831                         }
 832                         SparcAdjust = 1;
 833                         continue;
 834
 835                 case O(ASSEMBLE,'b'): /* here we simply set the bitmap file */
 836                         if (!optarg) {
 837                                 fprintf(stderr, Name ": bitmap file needed with -b in --assemble mode\n");
 838                                 exit(2);
 839                         }
 840                         if (strcmp(optarg, "internal")==0) {
 841                                 fprintf(stderr, Name ": there is no need to specify --bitmap when assembling arrays with internal bitmaps\n");
 842                                 continue;
 843                         }
 844                         bitmap_fd = open(optarg, O_RDWR);
 845                         if (!*optarg || bitmap_fd < 0) {
 846                                 fprintf(stderr, Name ": cannot open bitmap file %s: %s\n", optarg, strerror(errno));
 847                                 exit(2);
 848                         }
 849                         ident.bitmap_fd = bitmap_fd; /* for Assemble */
 850                         continue;
 851
 852                 case O(ASSEMBLE, BackupFile):
 853                 case O(GROW, BackupFile):
 854                         /* Specify a file into which grow might place a backup,
 855                          * or from which assemble might recover a backup
 856                          */
 857                         if (backup_file) {
 858                                 fprintf(stderr, Name ": backup file already specified, rejecting %s\n", optarg);
 859                                 exit(2);
 860                         }
 861                         backup_file = optarg;
 862                         continue;
 863
 864                 case O(BUILD,'b'):
 865                 case O(CREATE,'b'): /* here we create the bitmap */
 866                         if (strcmp(optarg, "none") == 0) {
 867                                 fprintf(stderr, Name ": '--bitmap none' only"
 868                                         " support for --grow\n");
 869                                 exit(2);
 870                         }
 871                         /* FALL THROUGH */
 872                 case O(GROW,'b'):
 873                         if (strcmp(optarg, "internal")== 0 ||
 874                             strcmp(optarg, "none")== 0 ||
 875                             strchr(optarg, '/') != NULL) {
 876                                 bitmap_file = optarg;
 877                                 continue;
 878                         }
 879                         /* probable typo */
 880                         fprintf(stderr, Name ": bitmap file must contain a '/', or be 'internal', or 'none'\n"
 881                                 "       not '%s'\n", optarg);
 882                         exit(2);
 883
 884                 case O(GROW,BitmapChunk):
 885                 case O(BUILD,BitmapChunk):
 886                 case O(CREATE,BitmapChunk): /* bitmap chunksize */
 887                         bitmap_chunk = strtol(optarg, &c, 10);
 888                         if (!optarg[0] || *c || bitmap_chunk < 0 ||
 889                                         bitmap_chunk & (bitmap_chunk - 1)) {
 890                                 fprintf(stderr, Name ": invalid bitmap chunksize: %s\n",
 891                                                 optarg);
 892                                 exit(2);
 893                         }
 894                         /* convert K to B, chunk of 0K means 512B */
 895                         bitmap_chunk = bitmap_chunk ? bitmap_chunk * 1024 : 512;
 896                         continue;
 897
 898                 case O(GROW, WriteBehind):
 899                 case O(BUILD, WriteBehind):
 900                 case O(CREATE, WriteBehind): /* write-behind mode */
 901                         write_behind = DEFAULT_MAX_WRITE_BEHIND;
 902                         if (optarg) {
 903                                 write_behind = strtol(optarg, &c, 10);
 904                                 if (write_behind < 0 || *c ||
 905                                     write_behind > 16383) {
 906                                         fprintf(stderr, Name ": Invalid value for maximum outstanding write-behind writes: %s.\n\tMust be between 0 and 16383.\n", optarg);
 907                                         exit(2);
 908                                 }
 909                         }
 910                         continue;
 911
 912                 case O(INCREMENTAL, 'r'):
 913                         rebuild_map = 1;
 914                         continue;
 915                 }
 916                 /* We have now processed all the valid options. Anything else is
 917                  * an error
 918                  */
 919                 if (option_index > 0)
 920                         fprintf(stderr, Name ":option --%s not valid in %s mode\n",
 921                                 long_options[option_index].name,
 922                                 map_num(modes, mode));
 923                 else
 924                         fprintf(stderr, Name ": option -%c not valid in %s mode\n",
 925                                 opt, map_num(modes, mode));
 926                 exit(2);
 927
 928         }
 929
 930         if (print_help) {
 931                 char *help_text = Help;
 932                 if (print_help == 2)
 933                         help_text = OptionHelp;
 934                 else
 935                         switch (mode) {
 936                         case ASSEMBLE : help_text = Help_assemble; break;
 937                         case BUILD    : help_text = Help_build; break;
 938                         case CREATE   : help_text = Help_create; break;
 939                         case MANAGE   : help_text = Help_manage; break;
 940                         case MISC     : help_text = Help_misc; break;
 941                         case MONITOR  : help_text = Help_monitor; break;
 942                         case GROW     : help_text = Help_grow; break;
 943                         case INCREMENTAL:help_text= Help_incr; break;
 944                         }
 945                 fputs(help_text,stdout);
 946                 exit(0);
 947         }
 948
 949         if (!mode && devs_found) {
 950                 mode = MISC;
 951                 devmode = 'Q';
 952                 if (devlist->disposition == 0)
 953                         devlist->disposition = devmode;
 954         }
 955         if (!mode) {
 956                 fputs(Usage, stderr);
 957                 exit(2);
 958         }
 959
 960         if (symlinks) {
 961                 struct createinfo *ci = conf_get_create_info();
 962
 963                 if (strcasecmp(symlinks, "yes") == 0)
 964                         ci->symlinks = 1;
 965                 else if (strcasecmp(symlinks, "no") == 0)
 966                         ci->symlinks = 0;
 967                 else {
 968                         fprintf(stderr, Name ": option --symlinks must be 'no' or 'yes'\n");
 969                         exit(2);
 970                 }
 971         }
 972         /* Ok, got the option parsing out of the way
 973          * hopefully it's mostly right but there might be some stuff
 974          * missing
 975          *
 976          * That is mosty checked in the per-mode stuff but...
 977          *
 978          * For @,B,C  and A without -s, the first device listed must be an md device
 979          * we check that here and open it.
 980          */
 981
 982         if (mode==MANAGE || mode == BUILD || mode == CREATE || mode == GROW ||
 983             (mode == ASSEMBLE && ! scan)) {
 984                 if (devs_found < 1) {
 985                         fprintf(stderr, Name ": an md device must be given in this mode\n");
 986                         exit(2);
 987                 }
 988                 if ((int)ident.super_minor == -2 && autof) {
 989                         fprintf(stderr, Name ": --super-minor=dev is incompatible with --auto\n");
 990                         exit(2);
 991                 }
 992                 if (mode == MANAGE || mode == GROW) {
 993                         mdfd = open_mddev(devlist->devname, 1);
 994                         if (mdfd < 0)
 995                                 exit(1);
 996                 } else
 997                         /* non-existent device is OK */
 998                         mdfd = open_mddev(devlist->devname, 0);
 999                 if (mdfd == -2) {
1000                         fprintf(stderr, Name ": device %s exists but is not an "
1001                                 "md array.\n", devlist->devname);
1002                         exit(1);
1003                 }
1004                 if ((int)ident.super_minor == -2) {
1005                         struct stat stb;
1006                         if (mdfd < 0) {
1007                                 fprintf(stderr, Name ": --super-minor=dev given, and "
1008                                         "listed device %s doesn't exist.\n",
1009                                         devlist->devname);
1010                                 exit(1);
1011                         }
1012                         fstat(mdfd, &stb);
1013                         ident.super_minor = minor(stb.st_rdev);
1014                 }
1015                 if (mdfd >= 0 && mode != MANAGE && mode != GROW) {
1016                         /* We don't really want this open yet, we just might
1017                          * have wanted to check some things
1018                          */
1019                         close(mdfd);
1020                         mdfd = -1;
1021                 }
1022         }
1023
1024         if (raiddisks) {
1025                 if (raiddisks > max_disks) {
1026                         fprintf(stderr, Name ": invalid number of raid devices: %d\n",
1027                                 raiddisks);
1028                         exit(2);
1029                 }
1030                 if (raiddisks == 1 &&  !force && level != -5) {
1031                         fprintf(stderr, Name ": '1' is an unusual number of drives for an array, so it is probably\n"
1032                                 "     a mistake.  If you really mean it you will need to specify --force before\n"
1033                                 "     setting the number of drives.\n");
1034                         exit(2);
1035                 }
1036         }
1037         if (sparedisks) {
1038                 if ( sparedisks > max_disks - raiddisks) {
1039                         fprintf(stderr, Name ": invalid number of spare-devices: %d\n",
1040                                 sparedisks);
1041                         exit(2);
1042                 }
1043         }
1044
1045         if (homehost == NULL)
1046                 homehost = conf_get_homehost(&require_homehost);
1047         if (homehost == NULL || strcmp(homehost, "<system>")==0) {
1048                 if (gethostname(sys_hostname, sizeof(sys_hostname)) == 0) {
1049                         sys_hostname[sizeof(sys_hostname)-1] = 0;
1050                         homehost = sys_hostname;
1051                 }
1052         }
1053
1054         if ((mode != MISC || devmode != 'E') &&
1055             geteuid() != 0) {
1056                 fprintf(stderr, Name ": must be super-user to perform this action\n");
1057                 exit(1);
1058         }
1059
1060         ident.autof = autof;
1061
1062         rv = 0;
1063         switch(mode) {
1064         case MANAGE:
1065                 /* readonly, add/remove, readwrite, runstop */
1066                 if (readonly>0)
1067                         rv = Manage_ro(devlist->devname, mdfd, readonly);
1068                 if (!rv && devs_found>1)
1069                         rv = Manage_subdevs(devlist->devname, mdfd,
1070                                             devlist->next, verbose-quiet, test);
1071                 if (!rv && readonly < 0)
1072                         rv = Manage_ro(devlist->devname, mdfd, readonly);
1073                 if (!rv && runstop)
1074                         rv = Manage_runstop(devlist->devname, mdfd, runstop, quiet);
1075                 break;
1076         case ASSEMBLE:
1077                 if (devs_found == 1 && ident.uuid_set == 0 &&
1078                     ident.super_minor == UnSet && ident.name[0] == 0 && !scan ) {
1079                         /* Only a device has been given, so get details from config file */
1080                         mddev_ident_t array_ident = conf_get_ident(devlist->devname);
1081                         if (array_ident == NULL) {
1082                                 fprintf(stderr, Name ": %s not identified in config file.\n",
1083                                         devlist->devname);
1084                                 rv |= 1;
1085                                 if (mdfd >= 0)
1086                                         close(mdfd);
1087                         } else {
1088                                 if (array_ident->autof == 0)
1089                                         array_ident->autof = autof;
1090                                 rv |= Assemble(ss, devlist->devname, array_ident,
1091                                                NULL, backup_file,
1092                                                readonly, runstop, update,
1093                                                homehost, require_homehost,
1094                                                verbose-quiet, force);
1095                         }
1096                 } else if (!scan)
1097                         rv = Assemble(ss, devlist->devname, &ident,
1098                                       devlist->next, backup_file,
1099                                       readonly, runstop, update,
1100                                       homehost, require_homehost,
1101                                       verbose-quiet, force);
1102                 else if (devs_found>0) {
1103                         if (update && devs_found > 1) {
1104                                 fprintf(stderr, Name ": can only update a single array at a time\n");
1105                                 exit(1);
1106                         }
1107                         if (backup_file && devs_found > 1) {
1108                                 fprintf(stderr, Name ": can only assemble a single array when providing a backup file.\n");
1109                                 exit(1);
1110                         }
1111                         for (dv = devlist ; dv ; dv=dv->next) {
1112                                 mddev_ident_t array_ident = conf_get_ident(dv->devname);
1113                                 if (array_ident == NULL) {
1114                                         fprintf(stderr, Name ": %s not identified in config file.\n",
1115                                                 dv->devname);
1116                                         rv |= 1;
1117                                         continue;
1118                                 }
1119                                 if (array_ident->autof == 0)
1120                                         array_ident->autof = autof;
1121                                 rv |= Assemble(ss, dv->devname, array_ident,
1122                                                NULL, backup_file,
1123                                                readonly, runstop, update,
1124                                                homehost, require_homehost,
1125                                                verbose-quiet, force);
1126                         }
1127                 } else {
1128                         mddev_ident_t a, array_list =  conf_get_ident(NULL);
1129                         mddev_dev_t devlist = conf_get_devs();
1130                         int cnt = 0;
1131                         int failures, successes;
1132                         if (devlist == NULL) {
1133                                 fprintf(stderr, Name ": No devices listed in conf file were found.\n");
1134                                 exit(1);
1135                         }
1136                         if (update) {
1137                                 fprintf(stderr, Name ": --update not meaningful with a --scan assembly.\n");
1138                                 exit(1);
1139                         }
1140                         if (backup_file) {
1141                                 fprintf(stderr, Name ": --backup_file not meaningful with a --scan assembly.\n");
1142                                 exit(1);
1143                         }
1144                         for (a = array_list; a ; a = a->next) {
1145                                 a->assembled = 0;
1146                                 if (a->autof == 0)
1147                                         a->autof = autof;
1148                         }
1149                         do {
1150                                 failures = 0;
1151                                 successes = 0;
1152                                 rv = 0;
1153                                 for (a = array_list; a ; a = a->next) {
1154                                         int r;
1155                                         if (a->assembled)
1156                                                 continue;
1157                                         if (a->devname &&
1158                                             strcasecmp(a->devname, "<ignore>") == 0)
1159                                                 continue;
1160
1161                                         r = Assemble(ss, a->devname,
1162                                                      a,
1163                                                      NULL, NULL,
1164                                                      readonly, runstop, NULL,
1165                                                      homehost, require_homehost,
1166                                                      verbose-quiet, force);
1167                                         if (r == 0) {
1168                                                 a->assembled = 1;
1169                                                 successes++;
1170                                         } else
1171                                                 failures++;
1172                                         rv |= r;
1173                                         cnt++;
1174                                 }
1175                         } while (failures && successes);
1176                         if (homehost && cnt == 0) {
1177                                 /* Maybe we can auto-assemble something.
1178                                  * Repeatedly call Assemble in auto-assemble mode
1179                                  * until it fails
1180                                  */
1181                                 int rv2;
1182                                 int acnt;
1183                                 ident.autof = autof;
1184                                 do {
1185                                         mddev_dev_t devlist = conf_get_devs();
1186                                         acnt = 0;
1187                                         do {
1188                                                 rv2 = Assemble(ss, NULL,
1189                                                                &ident,
1190                                                                devlist, NULL,
1191                                                                readonly, runstop, NULL,
1192                                                                homehost, require_homehost,
1193                                                                verbose-quiet, force);
1194                                                 if (rv2==0) {
1195                                                         cnt++;
1196                                                         acnt++;
1197                                                 }
1198                                                 if (rv2 == 1)
1199                                                         /* found something so even though assembly failed  we
1200                                                          * want to avoid auto-updates
1201                                                          */
1202                                                         auto_update_home = 0;
1203                                         } while (rv2!=2);
1204                                         /* Incase there are stacked devices, we need to go around again */
1205                                 } while (acnt);
1206 #if 0
1207                                 if (cnt == 0 && auto_update_home && homehost) {
1208                                         /* Nothing found, maybe we need to bootstrap homehost info */
1209                                         do {
1210                                                 acnt = 0;
1211                                                 do {
1212                                                         rv2 = Assemble(ss, NULL,
1213                                                                        &ident,
1214                                                                        NULL, NULL,
1215                                                                        readonly, runstop, "homehost",
1216                                                                        homehost, require_homehost,
1217                                                                        verbose-quiet, force);
1218                                                         if (rv2==0) {
1219                                                                 cnt++;
1220                                                                 acnt++;
1221                                                         }
1222                                                 } while (rv2!=2);
1223                                                 /* Incase there are stacked devices, we need to go around again */
1224                                         } while (acnt);
1225                                 }
1226 #endif
1227                                 if (cnt == 0 && rv == 0) {
1228                                         fprintf(stderr, Name ": No arrays found in config file or automatically\n");
1229                                         rv = 1;
1230                                 } else if (cnt)
1231                                         rv = 0;
1232                         } else if (cnt == 0 && rv == 0) {
1233                                 fprintf(stderr, Name ": No arrays found in config file\n");
1234                                 rv = 1;
1235                         }
1236                 }
1237                 break;
1238         case BUILD:
1239                 if (delay == 0) delay = DEFAULT_BITMAP_DELAY;
1240                 if (write_behind && !bitmap_file) {
1241                         fprintf(stderr, Name ": write-behind mode requires a bitmap.\n");
1242                         rv = 1;
1243                         break;
1244                 }
1245                 if (raiddisks == 0) {
1246                         fprintf(stderr, Name ": no raid-devices specified.\n");
1247                         rv = 1;
1248                         break;
1249                 }
1250
1251                 if (bitmap_file) {
1252                         if (strcmp(bitmap_file, "internal")==0) {
1253                                 fprintf(stderr, Name ": 'internal' bitmaps not supported with --build\n");
1254                                 rv |= 1;
1255                                 break;
1256                         }
1257                 }
1258                 rv = Build(devlist->devname, chunk, level, layout,
1259                            raiddisks, devlist->next, assume_clean,
1260                            bitmap_file, bitmap_chunk, write_behind,
1261                            delay, verbose-quiet, autof, size);
1262                 break;
1263         case CREATE:
1264                 if (delay == 0) delay = DEFAULT_BITMAP_DELAY;
1265                 if (write_behind && !bitmap_file) {
1266                         fprintf(stderr, Name ": write-behind mode requires a bitmap.\n");
1267                         rv = 1;
1268                         break;
1269                 }
1270                 if (raiddisks == 0) {
1271                         fprintf(stderr, Name ": no raid-devices specified.\n");
1272                         rv = 1;
1273                         break;
1274                 }
1275
1276                 rv = Create(ss, devlist->devname, chunk, level, layout, size<0 ? 0 : size,
1277                             raiddisks, sparedisks, ident.name, homehost,
1278                             ident.uuid_set ? ident.uuid : NULL,
1279                             devs_found-1, devlist->next, runstop, verbose-quiet, force, assume_clean,
1280                             bitmap_file, bitmap_chunk, write_behind, delay, autof);
1281                 break;
1282         case MISC:
1283                 if (devmode == 'E') {
1284                         if (devlist == NULL && !scan) {
1285                                 fprintf(stderr, Name ": No devices to examine\n");
1286                                 exit(2);
1287                         }
1288                         if (devlist == NULL)
1289                                 devlist = conf_get_devs();
1290                         if (devlist == NULL) {
1291                                 fprintf(stderr, Name ": No devices listed in %s\n", configfile?configfile:DefaultConfFile);
1292                                 exit(1);
1293                         }
1294                         if (brief && verbose)
1295                                 brief = 2;
1296                         rv = Examine(devlist, scan?(verbose>1?0:verbose+1):brief,
1297                                      export, scan,
1298                                      SparcAdjust, ss, homehost);
1299                 } else if (devmode == DetailPlatform) {
1300                         rv = Detail_Platform(ss ? ss->ss : NULL, ss ? scan : 1, verbose);
1301                 } else {
1302                         if (devlist == NULL) {
1303                                 if ((devmode=='D' || devmode == Waitclean) && scan) {
1304                                         /* apply --detail or --wait-clean to
1305                                          * all devices in /proc/mdstat
1306                                          */
1307                                         struct mdstat_ent *ms = mdstat_read(0, 1);
1308                                         struct mdstat_ent *e;
1309                                         struct map_ent *map = NULL;
1310                                         int members;
1311                                         int v = verbose>1?0:verbose+1;
1312
1313                                         for (members = 0; members <= 1; members++) {
1314                                         for (e=ms ; e ; e=e->next) {
1315                                                 char *name;
1316                                                 struct map_ent *me;
1317                                                 int member = e->metadata_version &&
1318                                                         strncmp(e->metadata_version,
1319                                                                 "external:/", 10) == 0;
1320                                                 if (members != member)
1321                                                         continue;
1322                                                 me = map_by_devnum(&map, e->devnum);
1323                                                 if (me && me->path
1324                                                     && strcmp(me->path, "/unknown") != 0)
1325                                                         name = me->path;
1326                                                 else
1327                                                         name = get_md_name(e->devnum);
1328
1329                                                 if (!name) {
1330                                                         fprintf(stderr, Name ": cannot find device file for %s\n",
1331                                                                 e->dev);
1332                                                         continue;
1333                                                 }
1334                                                 if (devmode == 'D')
1335                                                         rv |= Detail(name, v,
1336                                                                      export, test,
1337                                                                      homehost);
1338                                                 else
1339                                                         rv |= WaitClean(name, -1, v);
1340                                                 put_md_name(name);
1341                                         }
1342                                         }
1343                                         free_mdstat(ms);
1344                                 } else  if (devmode == 'S' && scan) {
1345                                         /* apply --stop to all devices in /proc/mdstat */
1346                                         /* Due to possible stacking of devices, repeat until
1347                                          * nothing more can be stopped
1348                                          */
1349                                         int progress=1, err;
1350                                         int last = 0;
1351                                         do {
1352                                                 struct mdstat_ent *ms = mdstat_read(0, 0);
1353                                                 struct mdstat_ent *e;
1354
1355                                                 if (!progress) last = 1;
1356                                                 progress = 0; err = 0;
1357                                                 for (e=ms ; e ; e=e->next) {
1358                                                         char *name = get_md_name(e->devnum);
1359
1360                                                         if (!name) {
1361                                                                 fprintf(stderr, Name ": cannot find device file for %s\n",
1362                                                                         e->dev);
1363                                                                 continue;
1364                                                         }
1365                                                         mdfd = open_mddev(name, 1);
1366                                                         if (mdfd >= 0) {
1367                                                                 if (Manage_runstop(name, mdfd, -1, quiet?1:last?0:-1))
1368                                                                         err = 1;
1369                                                                 else
1370                                                                         progress = 1;
1371                                                                 close(mdfd);
1372                                                         }
1373
1374                                                         put_md_name(name);
1375                                                 }
1376                                                 free_mdstat(ms);
1377                                         } while (!last && err);
1378                                         if (err) rv |= 1;
1379                                 } else {
1380                                         fprintf(stderr, Name ": No devices given.\n");
1381                                         exit(2);
1382                                 }
1383                         }
1384                         for (dv=devlist ; dv; dv=dv->next) {
1385                                 switch(dv->disposition) {
1386                                 case 'D':
1387                                         rv |= Detail(dv->devname,
1388                                                      brief?1+verbose:0,
1389                                                      export, test, homehost);
1390                                         continue;
1391                                 case 'K': /* Zero superblock */
1392                                         if (ss)
1393                                                 rv |= Kill(dv->devname, ss, force, quiet,0);
1394                                         else {
1395                                                 int q = quiet;
1396                                                 do {
1397                                                         rv |= Kill(dv->devname, NULL, force, q, 0);
1398                                                         q = 1;
1399                                                 } while (rv == 0);
1400                                                 rv &= ~2;
1401                                         }
1402                                         continue;
1403                                 case 'Q':
1404                                         rv |= Query(dv->devname); continue;
1405                                 case 'X':
1406                                         rv |= ExamineBitmap(dv->devname, brief, ss); continue;
1407                                 case 'W':
1408                                         rv |= Wait(dv->devname); continue;
1409                                 case Waitclean:
1410                                         rv |= WaitClean(dv->devname, -1, verbose-quiet); continue;
1411                                 }
1412                                 mdfd = open_mddev(dv->devname, 1);
1413                                 if (mdfd>=0) {
1414                                         switch(dv->disposition) {
1415                                         case 'R':
1416                                                 rv |= Manage_runstop(dv->devname, mdfd, 1, quiet); break;
1417                                         case 'S':
1418                                                 rv |= Manage_runstop(dv->devname, mdfd, -1, quiet); break;
1419                                         case 'o':
1420                                                 rv |= Manage_ro(dv->devname, mdfd, 1); break;
1421                                         case 'w':
1422                                                 rv |= Manage_ro(dv->devname, mdfd, -1); break;
1423                                         }
1424                                         close(mdfd);
1425                                 } else
1426                                         rv |= 1;
1427                         }
1428                 }
1429                 break;
1430         case MONITOR:
1431                 if (!devlist && !scan) {
1432                         fprintf(stderr, Name ": Cannot monitor: need --scan or at least one device\n");
1433                         rv = 1;
1434                         break;
1435                 }
1436                 if (pidfile && !daemonise) {
1437                         fprintf(stderr, Name ": Cannot write a pid file when not in daemon mode\n");
1438                         rv = 1;
1439                         break;
1440                 }
1441                 if (delay == 0) {
1442                         if (get_linux_version() > 20616)
1443                                 /* mdstat responds to poll */
1444                                 delay = 1000;
1445                         else
1446                                 delay = 60;
1447                 }
1448                 rv= Monitor(devlist, mailaddr, program,
1449                             delay?delay:60, daemonise, scan, oneshot,
1450                             dosyslog, test, pidfile, increments);
1451                 break;
1452
1453         case GROW:
1454                 if (array_size >= 0) {
1455                         /* alway impose array size first, independent of
1456                          * anything else
1457                          * Do not allow level or raid_disks changes at the
1458                          * same time as that can be irreversibly destructive.
1459                          */
1460                         struct mdinfo sra;
1461                         int err;
1462                         if (raiddisks || level != UnSet) {
1463                                 fprintf(stderr, Name ": cannot change array size in same operation "
1464                                         "as changing raiddisks or level.\n"
1465                                         "    Change size first, then check that data is still intact.\n");
1466                                 rv = 1;
1467                                 break;
1468                         }
1469                         sysfs_init(&sra, mdfd, 0);
1470                         if (array_size == 0)
1471                                 err = sysfs_set_str(&sra, NULL, "array_size", "default");
1472                         else
1473                                 err = sysfs_set_num(&sra, NULL, "array_size", array_size / 2);
1474                         if (err < 0) {
1475                                 if (errno == E2BIG)
1476                                         fprintf(stderr, Name ": --array-size setting"
1477                                                 " is too large.\n");
1478                                 else
1479                                         fprintf(stderr, Name ": current kernel does"
1480                                                 " not support setting --array-size\n");
1481                                 rv = 1;
1482                                 break;
1483                         }
1484                 }
1485                 if (devs_found > 1) {
1486
1487                         /* must be '-a'. */
1488                         if (size >= 0 || raiddisks || chunk || layout_str != NULL || bitmap_file) {
1489                                 fprintf(stderr, Name ": --add cannot be used with other geometry changes in --grow mode\n");
1490                                 rv = 1;
1491                                 break;
1492                         }
1493                         for (dv=devlist->next; dv ; dv=dv->next) {
1494                                 rv = Grow_Add_device(devlist->devname, mdfd, dv->devname);
1495                                 if (rv)
1496                                         break;
1497                         }
1498                 } else if (bitmap_file) {
1499                         if (size >= 0 || raiddisks || chunk || layout_str != NULL) {
1500                                 fprintf(stderr, Name ": --bitmap changes cannot be used with other geometry changes in --grow mode\n");
1501                                 rv = 1;
1502                                 break;
1503                         }
1504                         if (delay == 0)
1505                                 delay = DEFAULT_BITMAP_DELAY;
1506                         rv = Grow_addbitmap(devlist->devname, mdfd, bitmap_file,
1507                                             bitmap_chunk, delay, write_behind, force);
1508                 } else if (size >= 0 || raiddisks != 0 || layout_str != NULL
1509                            || chunk != 0 || level != UnSet) {
1510                         rv = Grow_reshape(devlist->devname, mdfd, quiet, backup_file,
1511                                           size, level, layout_str, chunk, raiddisks);
1512                 } else if (array_size < 0)
1513                         fprintf(stderr, Name ": no changes to --grow\n");
1514                 break;
1515         case INCREMENTAL:
1516                 if (rebuild_map) {
1517                         RebuildMap();
1518                 }
1519                 if (scan) {
1520                         if (runstop <= 0) {
1521                                 fprintf(stderr, Name
1522                          ": --incremental --scan meaningless without --run.\n");
1523                                 break;
1524                         }
1525                         if (devmode == 'f') {
1526                                 fprintf(stderr, Name
1527                          ": --incremental --scan --fail not supported.\n");
1528                                 break;
1529                         }
1530                         rv = IncrementalScan(verbose);
1531                 }
1532                 if (!devlist) {
1533                         if (!rebuild_map && !scan) {
1534                                 fprintf(stderr, Name
1535                                         ": --incremental requires a device.\n");
1536                                 rv = 1;
1537                         }
1538                         break;
1539                 }
1540                 if (devlist->next) {
1541                         fprintf(stderr, Name
1542                                ": --incremental can only handle one device.\n");
1543                         rv = 1;
1544                         break;
1545                 }
1546                 if (devmode == 'f') {
1547                         rv = IncrementalRemove(devlist->devname, verbose-quiet);
1548                         break;
1549                 }
1550                 rv = Incremental(devlist->devname, verbose-quiet, runstop,
1551                                  ss, homehost, require_homehost, autof);
1552                 break;
1553         case AUTODETECT:
1554                 autodetect();
1555                 break;
1556         }
1557         exit(rv);
1558 }