mdadm.c

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