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, struct context *c);
  37 static int stop_scan(int verbose);
  38 static int misc_list(struct mddev_dev *devlist,
  39                      struct mddev_ident *ident,
  40                      struct supertype *ss, struct context *c);
  41
  42
  43 int main(int argc, char *argv[])
  44 {
  45         int mode = 0;
  46         int opt;
  47         int option_index;
  48         int rv;
  49         int i;
  50
  51         unsigned long long array_size = 0;
  52         unsigned long long data_offset = INVALID_SECTORS;
  53         struct mddev_ident ident;
  54         char *configfile = NULL;
  55         int devmode = 0;
  56         int bitmap_fd = -1;
  57         struct mddev_dev *devlist = NULL;
  58         struct mddev_dev **devlistend = & devlist;
  59         struct mddev_dev *dv;
  60         int devs_found = 0;
  61         char *symlinks = NULL;
  62         int grow_continue = 0;
  63         /* autof indicates whether and how to create device node.
  64          * bottom 3 bits are style.  Rest (when shifted) are number of parts
  65          * 0  - unset
  66          * 1  - don't create (no)
  67          * 2  - if is_standard, then create (yes)
  68          * 3  - create as 'md' - reject is_standard mdp (md)
  69          * 4  - create as 'mdp' - reject is_standard md (mdp)
  70          * 5  - default to md if not is_standard (md in config file)
  71          * 6  - default to mdp if not is_standard (part, or mdp in config file)
  72          */
  73         struct context c = {
  74                 .require_homehost = 1,
  75         };
  76         struct shape s = {
  77                 .level          = UnSet,
  78                 .layout         = UnSet,
  79                 .bitmap_chunk   = UnSet,
  80         };
  81
  82         char sys_hostname[256];
  83         char *mailaddr = NULL;
  84         char *program = NULL;
  85         int increments = 20;
  86         int daemonise = 0;
  87         char *pidfile = NULL;
  88         int oneshot = 0;
  89         int spare_sharing = 1;
  90         struct supertype *ss = NULL;
  91         int writemostly = 0;
  92         char *shortopt = short_options;
  93         int dosyslog = 0;
  94         int rebuild_map = 0;
  95         char *remove_path = NULL;
  96         char *udev_filename = NULL;
  97
  98         int print_help = 0;
  99         FILE *outf;
 100
 101         int mdfd = -1;
 102
 103         srandom(time(0) ^ getpid());
 104
 105         ident.uuid_set=0;
 106         ident.level = UnSet;
 107         ident.raid_disks = UnSet;
 108         ident.super_minor= UnSet;
 109         ident.devices=0;
 110         ident.spare_group = NULL;
 111         ident.autof = 0;
 112         ident.st = NULL;
 113         ident.bitmap_fd = -1;
 114         ident.bitmap_file = NULL;
 115         ident.name[0] = 0;
 116         ident.container = NULL;
 117         ident.member = NULL;
 118
 119         while ((option_index = -1) ,
 120                (opt=getopt_long(argc, argv,
 121                                 shortopt, long_options,
 122                                 &option_index)) != -1) {
 123                 int newmode = mode;
 124                 /* firstly, some mode-independent options */
 125                 switch(opt) {
 126                 case HelpOptions:
 127                         print_help = 2;
 128                         continue;
 129                 case 'h':
 130                         print_help = 1;
 131                         continue;
 132
 133                 case 'V':
 134                         fputs(Version, stderr);
 135                         exit(0);
 136
 137                 case 'v': c.verbose++;
 138                         continue;
 139
 140                 case 'q': c.verbose--;
 141                         continue;
 142
 143                 case 'b':
 144                         if (mode == ASSEMBLE || mode == BUILD || mode == CREATE
 145                             || mode == GROW || mode == INCREMENTAL
 146                             || mode == MANAGE)
 147                                 break; /* b means bitmap */
 148                 case Brief:
 149                         c.brief = 1;
 150                         continue;
 151
 152                 case 'Y': c.export++;
 153                         continue;
 154
 155                 case HomeHost:
 156                         if (strcasecmp(optarg, "<ignore>") == 0)
 157                                 c.require_homehost = 0;
 158                         else
 159                                 c.homehost = optarg;
 160                         continue;
 161
 162                 /*
 163                  * --offroot sets first char of argv[0] to @. This is used
 164                  * by systemd to signal that the task was launched from
 165                  * initrd/initramfs and should be preserved during shutdown
 166                  */
 167                 case OffRootOpt:
 168                         argv[0][0] = '@';
 169                         __offroot = 1;
 170                         continue;
 171
 172                 case Prefer:
 173                         if (c.prefer)
 174                                 free(c.prefer);
 175                         if (asprintf(&c.prefer, "/%s/", optarg) <= 0)
 176                                 c.prefer = NULL;
 177                         continue;
 178
 179                 case ':':
 180                 case '?':
 181                         fputs(Usage, stderr);
 182                         exit(2);
 183                 }
 184                 /* second, figure out the mode.
 185                  * Some options force the mode.  Others
 186                  * set the mode if it isn't already
 187                  */
 188
 189                 switch(opt) {
 190                 case ManageOpt:
 191                         newmode = MANAGE;
 192                         shortopt = short_bitmap_options;
 193                         break;
 194                 case 'a':
 195                 case Add:
 196                 case 'r':
 197                 case Remove:
 198                 case Replace:
 199                 case With:
 200                 case 'f':
 201                 case Fail:
 202                 case ReAdd: /* re-add */
 203                         if (!mode) {
 204                                 newmode = MANAGE;
 205                                 shortopt = short_bitmap_options;
 206                         }
 207                         break;
 208
 209                 case 'A': newmode = ASSEMBLE;
 210                         shortopt = short_bitmap_auto_options;
 211                         break;
 212                 case 'B': newmode = BUILD;
 213                         shortopt = short_bitmap_auto_options;
 214                         break;
 215                 case 'C': newmode = CREATE;
 216                         shortopt = short_bitmap_auto_options;
 217                         break;
 218                 case 'F': newmode = MONITOR;
 219                         break;
 220                 case 'G': newmode = GROW;
 221                         shortopt = short_bitmap_options;
 222                         break;
 223                 case 'I': newmode = INCREMENTAL;
 224                         shortopt = short_bitmap_auto_options;
 225                         break;
 226                 case AutoDetect:
 227                         newmode = AUTODETECT;
 228                         break;
 229
 230                 case MiscOpt:
 231                 case 'D':
 232                 case 'E':
 233                 case 'X':
 234                 case 'Q':
 235                         newmode = MISC;
 236                         break;
 237
 238                 case 'R':
 239                 case 'S':
 240                 case 'o':
 241                 case 'w':
 242                 case 'W':
 243                 case WaitOpt:
 244                 case Waitclean:
 245                 case DetailPlatform:
 246                 case KillSubarray:
 247                 case UpdateSubarray:
 248                 case UdevRules:
 249                 case KillOpt:
 250                         if (!mode)
 251                                 newmode = MISC;
 252                         break;
 253
 254                 case NoSharing:
 255                         newmode = MONITOR;
 256                         break;
 257                 }
 258                 if (mode && newmode == mode) {
 259                         /* everybody happy ! */
 260                 } else if (mode && newmode != mode) {
 261                         /* not allowed.. */
 262                         pr_err("");
 263                         if (option_index >= 0)
 264                                 fprintf(stderr, "--%s", long_options[option_index].name);
 265                         else
 266                                 fprintf(stderr, "-%c", opt);
 267                         fprintf(stderr, " would set mdadm mode to \"%s\", but it is already set to \"%s\".\n",
 268                                 map_num(modes, newmode),
 269                                 map_num(modes, mode));
 270                         exit(2);
 271                 } else if (!mode && newmode) {
 272                         mode = newmode;
 273                         if (mode == MISC && devs_found) {
 274                                 pr_err("No action given for %s in --misc mode\n",
 275                                         devlist->devname);
 276                                 fprintf(stderr,"       Action options must come before device names\n");
 277                                 exit(2);
 278                         }
 279                 } else {
 280                         /* special case of -c --help */
 281                         if ((opt == 'c' || opt == ConfigFile) &&
 282                             ( strncmp(optarg, "--h", 3)==0 ||
 283                               strncmp(optarg, "-h", 2)==0)) {
 284                                 fputs(Help_config, stdout);
 285                                 exit(0);
 286                         }
 287
 288                         /* If first option is a device, don't force the mode yet */
 289                         if (opt == 1) {
 290                                 if (devs_found == 0) {
 291                                         dv = xmalloc(sizeof(*dv));
 292                                         dv->devname = optarg;
 293                                         dv->disposition = devmode;
 294                                         dv->writemostly = writemostly;
 295                                         dv->used = 0;
 296                                         dv->next = NULL;
 297                                         *devlistend = dv;
 298                                         devlistend = &dv->next;
 299
 300                                         devs_found++;
 301                                         continue;
 302                                 }
 303                                 /* No mode yet, and this is the second device ... */
 304                                 pr_err("An option must be given to set the mode before a second device\n"
 305                                         "       (%s) is listed\n", optarg);
 306                                 exit(2);
 307                         }
 308                         if (option_index >= 0)
 309                                 pr_err("--%s", long_options[option_index].name);
 310                         else
 311                                 pr_err("-%c", opt);
 312                         fprintf(stderr, " does not set the mode, and so cannot be the first option.\n");
 313                         exit(2);
 314                 }
 315
 316                 /* if we just set the mode, then done */
 317                 switch(opt) {
 318                 case ManageOpt:
 319                 case MiscOpt:
 320                 case 'A':
 321                 case 'B':
 322                 case 'C':
 323                 case 'F':
 324                 case 'G':
 325                 case 'I':
 326                 case AutoDetect:
 327                         continue;
 328                 }
 329                 if (opt == 1) {
 330                         /* an undecorated option - must be a device name.
 331                          */
 332
 333                         if (devs_found > 0 && devmode == DetailPlatform) {
 334                                 pr_err("controller may only be specified once. %s ignored\n",
 335                                                 optarg);
 336                                 continue;
 337                         }
 338
 339                         if (devs_found > 0 && mode == MANAGE && !devmode) {
 340                                 pr_err("Must give one of -a/-r/-f"
 341                                         " for subsequent devices at %s\n", optarg);
 342                                 exit(2);
 343                         }
 344                         if (devs_found > 0 && mode == GROW && !devmode) {
 345                                 pr_err("Must give -a/--add for"
 346                                        " devices to add: %s\n", optarg);
 347                                 exit(2);
 348                         }
 349                         dv = xmalloc(sizeof(*dv));
 350                         dv->devname = optarg;
 351                         dv->disposition = devmode;
 352                         dv->writemostly = writemostly;
 353                         dv->used = 0;
 354                         dv->next = NULL;
 355                         *devlistend = dv;
 356                         devlistend = &dv->next;
 357
 358                         devs_found++;
 359                         continue;
 360                 }
 361
 362                 /* We've got a mode, and opt is now something else which
 363                  * could depend on the mode */
 364 #define O(a,b) ((a<<16)|b)
 365                 switch (O(mode,opt)) {
 366                 case O(GROW,'c'):
 367                 case O(GROW,ChunkSize):
 368                 case O(CREATE,'c'):
 369                 case O(CREATE,ChunkSize):
 370                 case O(BUILD,'c'): /* chunk or rounding */
 371                 case O(BUILD,ChunkSize): /* chunk or rounding */
 372                         if (s.chunk) {
 373                                 pr_err("chunk/rounding may only be specified once. "
 374                                         "Second value is %s.\n", optarg);
 375                                 exit(2);
 376                         }
 377                         s.chunk = parse_size(optarg);
 378                         if (s.chunk == INVALID_SECTORS ||
 379                             s.chunk < 8 || (s.chunk&1)) {
 380                                 pr_err("invalid chunk/rounding value: %s\n",
 381                                         optarg);
 382                                 exit(2);
 383                         }
 384                         /* Convert sectors to K */
 385                         s.chunk /= 2;
 386                         continue;
 387
 388                 case O(INCREMENTAL, 'e'):
 389                 case O(CREATE,'e'):
 390                 case O(ASSEMBLE,'e'):
 391                 case O(MISC,'e'): /* set metadata (superblock) information */
 392                         if (ss) {
 393                                 pr_err("metadata information already given\n");
 394                                 exit(2);
 395                         }
 396                         for(i=0; !ss && superlist[i]; i++)
 397                                 ss = superlist[i]->match_metadata_desc(optarg);
 398
 399                         if (!ss) {
 400                                 pr_err("unrecognised metadata identifier: %s\n", optarg);
 401                                 exit(2);
 402                         }
 403                         continue;
 404
 405                 case O(MANAGE,'W'):
 406                 case O(MANAGE,WriteMostly):
 407                 case O(BUILD,'W'):
 408                 case O(BUILD,WriteMostly):
 409                 case O(CREATE,'W'):
 410                 case O(CREATE,WriteMostly):
 411                         /* set write-mostly for following devices */
 412                         writemostly = 1;
 413                         continue;
 414
 415                 case O(MANAGE,'w'):
 416                         /* clear write-mostly for following devices */
 417                         writemostly = 2;
 418                         continue;
 419
 420
 421                 case O(GROW,'z'):
 422                 case O(CREATE,'z'):
 423                 case O(BUILD,'z'): /* size */
 424                         if (s.size > 0) {
 425                                 pr_err("size may only be specified once. "
 426                                         "Second value is %s.\n", optarg);
 427                                 exit(2);
 428                         }
 429                         if (strcmp(optarg, "max")==0)
 430                                 s.size = MAX_SIZE;
 431                         else {
 432                                 s.size = parse_size(optarg);
 433                                 if (s.size == INVALID_SECTORS ||
 434                                     s.size < 8) {
 435                                         pr_err("invalid size: %s\n",
 436                                                 optarg);
 437                                         exit(2);
 438                                 }
 439                                 /* convert sectors to K */
 440                                 s.size /= 2;
 441                         }
 442                         continue;
 443
 444                 case O(GROW,'Z'): /* array size */
 445                         if (array_size > 0) {
 446                                 pr_err("array-size may only be specified once. "
 447                                         "Second value is %s.\n", optarg);
 448                                 exit(2);
 449                         }
 450                         if (strcmp(optarg, "max") == 0)
 451                                 array_size = MAX_SIZE;
 452                         else {
 453                                 array_size = parse_size(optarg);
 454                                 if (array_size == 0 ||
 455                                     array_size == INVALID_SECTORS) {
 456                                         pr_err("invalid array size: %s\n",
 457                                                 optarg);
 458                                         exit(2);
 459                                 }
 460                         }
 461                         continue;
 462
 463                 case O(CREATE,DataOffset):
 464                 case O(GROW,DataOffset):
 465                         if (data_offset != INVALID_SECTORS) {
 466                                 fprintf(stderr, Name ": data-offset may only be specified one. "
 467                                         "Second value is %s.\n", optarg);
 468                                 exit(2);
 469                         }
 470                         if (mode == CREATE &&
 471                             strcmp(optarg, "variable") == 0)
 472                                 data_offset = VARIABLE_OFFSET;
 473                         else
 474                                 data_offset = parse_size(optarg);
 475                         if (data_offset == INVALID_SECTORS) {
 476                                 fprintf(stderr, Name ": invalid data-offset: %s\n",
 477                                         optarg);
 478                                 exit(2);
 479                         }
 480                         continue;
 481
 482                 case O(GROW,'l'):
 483                 case O(CREATE,'l'):
 484                 case O(BUILD,'l'): /* set raid level*/
 485                         if (s.level != UnSet) {
 486                                 pr_err("raid level may only be set once.  "
 487                                         "Second value is %s.\n", optarg);
 488                                 exit(2);
 489                         }
 490                         s.level = map_name(pers, optarg);
 491                         if (s.level == UnSet) {
 492                                 pr_err("invalid raid level: %s\n",
 493                                         optarg);
 494                                 exit(2);
 495                         }
 496                         if (s.level != 0 && s.level != LEVEL_LINEAR && s.level != 1 &&
 497                             s.level != LEVEL_MULTIPATH && s.level != LEVEL_FAULTY &&
 498                             s.level != 10 &&
 499                             mode == BUILD) {
 500                                 pr_err("Raid level %s not permitted with --build.\n",
 501                                         optarg);
 502                                 exit(2);
 503                         }
 504                         if (s.sparedisks > 0 && s.level < 1 && s.level >= -1) {
 505                                 pr_err("raid level %s is incompatible with spare-devices setting.\n",
 506                                         optarg);
 507                                 exit(2);
 508                         }
 509                         ident.level = s.level;
 510                         continue;
 511
 512                 case O(GROW, 'p'): /* new layout */
 513                 case O(GROW, Layout):
 514                         if (s.layout_str) {
 515                                 pr_err("layout may only be sent once.  "
 516                                        "Second value was %s\n", optarg);
 517                                 exit(2);
 518                         }
 519                         s.layout_str = optarg;
 520                         /* 'Grow' will parse the value */
 521                         continue;
 522
 523                 case O(CREATE,'p'): /* raid5 layout */
 524                 case O(CREATE,Layout):
 525                 case O(BUILD,'p'): /* faulty layout */
 526                 case O(BUILD,Layout):
 527                         if (s.layout != UnSet) {
 528                                 pr_err("layout may only be sent once.  "
 529                                        "Second value was %s\n", optarg);
 530                                 exit(2);
 531                         }
 532                         switch(s.level) {
 533                         default:
 534                                 pr_err("layout not meaningful for %s arrays.\n",
 535                                         map_num(pers, s.level));
 536                                 exit(2);
 537                         case UnSet:
 538                                 pr_err("raid level must be given before layout.\n");
 539                                 exit(2);
 540
 541                         case 5:
 542                                 s.layout = map_name(r5layout, optarg);
 543                                 if (s.layout==UnSet) {
 544                                         pr_err("layout %s not understood for raid5.\n",
 545                                                 optarg);
 546                                         exit(2);
 547                                 }
 548                                 break;
 549                         case 6:
 550                                 s.layout = map_name(r6layout, optarg);
 551                                 if (s.layout==UnSet) {
 552                                         pr_err("layout %s not understood for raid6.\n",
 553                                                 optarg);
 554                                         exit(2);
 555                                 }
 556                                 break;
 557
 558                         case 10:
 559                                 s.layout = parse_layout_10(optarg);
 560                                 if (s.layout < 0) {
 561                                         pr_err("layout for raid10 must be 'nNN', 'oNN' or 'fNN' where NN is a number, not %s\n", optarg);
 562                                         exit(2);
 563                                 }
 564                                 break;
 565                         case LEVEL_FAULTY:
 566                                 /* Faulty
 567                                  * modeNNN
 568                                  */
 569                                 s.layout = parse_layout_faulty(optarg);
 570                                 if (s.layout == -1) {
 571                                         pr_err("layout %s not understood for faulty.\n",
 572                                                 optarg);
 573                                         exit(2);
 574                                 }
 575                                 break;
 576                         }
 577                         continue;
 578
 579                 case O(CREATE,AssumeClean):
 580                 case O(BUILD,AssumeClean): /* assume clean */
 581                 case O(GROW,AssumeClean):
 582                         s.assume_clean = 1;
 583                         continue;
 584
 585                 case O(GROW,'n'):
 586                 case O(CREATE,'n'):
 587                 case O(BUILD,'n'): /* number of raid disks */
 588                         if (s.raiddisks) {
 589                                 pr_err("raid-devices set twice: %d and %s\n",
 590                                         s.raiddisks, optarg);
 591                                 exit(2);
 592                         }
 593                         s.raiddisks = parse_num(optarg);
 594                         if (s.raiddisks <= 0) {
 595                                 pr_err("invalid number of raid devices: %s\n",
 596                                         optarg);
 597                                 exit(2);
 598                         }
 599                         ident.raid_disks = s.raiddisks;
 600                         continue;
 601
 602                 case O(CREATE,'x'): /* number of spare (eXtra) disks */
 603                         if (s.sparedisks) {
 604                                 pr_err("spare-devices set twice: %d and %s\n",
 605                                        s.sparedisks, optarg);
 606                                 exit(2);
 607                         }
 608                         if (s.level != UnSet && s.level <= 0 && s.level >= -1) {
 609                                 pr_err("spare-devices setting is incompatible with raid level %d\n",
 610                                         s.level);
 611                                 exit(2);
 612                         }
 613                         s.sparedisks = parse_num(optarg);
 614                         if (s.sparedisks < 0) {
 615                                 pr_err("invalid number of spare-devices: %s\n",
 616                                         optarg);
 617                                 exit(2);
 618                         }
 619                         continue;
 620
 621                 case O(CREATE,'a'):
 622                 case O(CREATE,Auto):
 623                 case O(BUILD,'a'):
 624                 case O(BUILD,Auto):
 625                 case O(INCREMENTAL,'a'):
 626                 case O(INCREMENTAL,Auto):
 627                 case O(ASSEMBLE,'a'):
 628                 case O(ASSEMBLE,Auto): /* auto-creation of device node */
 629                         c.autof = parse_auto(optarg, "--auto flag", 0);
 630                         continue;
 631
 632                 case O(CREATE,Symlinks):
 633                 case O(BUILD,Symlinks):
 634                 case O(ASSEMBLE,Symlinks): /* auto creation of symlinks in /dev to /dev/md */
 635                         symlinks = optarg;
 636                         continue;
 637
 638                 case O(BUILD,'f'): /* force honouring '-n 1' */
 639                 case O(BUILD,Force): /* force honouring '-n 1' */
 640                 case O(GROW,'f'): /* ditto */
 641                 case O(GROW,Force): /* ditto */
 642                 case O(CREATE,'f'): /* force honouring of device list */
 643                 case O(CREATE,Force): /* force honouring of device list */
 644                 case O(ASSEMBLE,'f'): /* force assembly */
 645                 case O(ASSEMBLE,Force): /* force assembly */
 646                 case O(MISC,'f'): /* force zero */
 647                 case O(MISC,Force): /* force zero */
 648                 case O(MANAGE,Force): /* add device which is too large */
 649                         c.force=1;
 650                         continue;
 651                         /* now for the Assemble options */
 652                 case O(ASSEMBLE, FreezeReshape):   /* Freeze reshape during
 653                                                     * initrd phase */
 654                 case O(INCREMENTAL, FreezeReshape):
 655                         c.freeze_reshape = 1;
 656                         continue;
 657                 case O(CREATE,'u'): /* uuid of array */
 658                 case O(ASSEMBLE,'u'): /* uuid of array */
 659                         if (ident.uuid_set) {
 660                                 pr_err("uuid cannot be set twice.  "
 661                                         "Second value %s.\n", optarg);
 662                                 exit(2);
 663                         }
 664                         if (parse_uuid(optarg, ident.uuid))
 665                                 ident.uuid_set = 1;
 666                         else {
 667                                 pr_err("Bad uuid: %s\n", optarg);
 668                                 exit(2);
 669                         }
 670                         continue;
 671
 672                 case O(CREATE,'N'):
 673                 case O(ASSEMBLE,'N'):
 674                 case O(MISC,'N'):
 675                         if (ident.name[0]) {
 676                                 pr_err("name cannot be set twice.   "
 677                                         "Second value %s.\n", optarg);
 678                                 exit(2);
 679                         }
 680                         if (mode == MISC && !c.subarray) {
 681                                 pr_err("-N/--name only valid with --update-subarray in misc mode\n");
 682                                 exit(2);
 683                         }
 684                         if (strlen(optarg) > 32) {
 685                                 pr_err("name '%s' is too long, 32 chars max.\n",
 686                                         optarg);
 687                                 exit(2);
 688                         }
 689                         strcpy(ident.name, optarg);
 690                         continue;
 691
 692                 case O(ASSEMBLE,'m'): /* super-minor for array */
 693                 case O(ASSEMBLE,SuperMinor):
 694                         if (ident.super_minor != UnSet) {
 695                                 pr_err("super-minor cannot be set twice.  "
 696                                         "Second value: %s.\n", optarg);
 697                                 exit(2);
 698                         }
 699                         if (strcmp(optarg, "dev")==0)
 700                                 ident.super_minor = -2;
 701                         else {
 702                                 ident.super_minor = parse_num(optarg);
 703                                 if (ident.super_minor < 0) {
 704                                         pr_err("Bad super-minor number: %s.\n", optarg);
 705                                         exit(2);
 706                                 }
 707                         }
 708                         continue;
 709
 710                 case O(ASSEMBLE,'o'):
 711                 case O(MANAGE,'o'):
 712                 case O(CREATE,'o'):
 713                         c.readonly = 1;
 714                         continue;
 715
 716                 case O(ASSEMBLE,'U'): /* update the superblock */
 717                 case O(MISC,'U'):
 718                         if (c.update) {
 719                                 pr_err("Can only update one aspect"
 720                                         " of superblock, both %s and %s given.\n",
 721                                         c.update, optarg);
 722                                 exit(2);
 723                         }
 724                         if (mode == MISC && !c.subarray) {
 725                                 pr_err("Only subarrays can be"
 726                                         " updated in misc mode\n");
 727                                 exit(2);
 728                         }
 729                         c.update = optarg;
 730                         if (strcmp(c.update, "sparc2.2")==0)
 731                                 continue;
 732                         if (strcmp(c.update, "super-minor") == 0)
 733                                 continue;
 734                         if (strcmp(c.update, "summaries")==0)
 735                                 continue;
 736                         if (strcmp(c.update, "resync")==0)
 737                                 continue;
 738                         if (strcmp(c.update, "uuid")==0)
 739                                 continue;
 740                         if (strcmp(c.update, "name")==0)
 741                                 continue;
 742                         if (strcmp(c.update, "homehost")==0)
 743                                 continue;
 744                         if (strcmp(c.update, "devicesize")==0)
 745                                 continue;
 746                         if (strcmp(c.update, "no-bitmap")==0)
 747                                 continue;
 748                         if (strcmp(c.update, "bbl") == 0)
 749                                 continue;
 750                         if (strcmp(c.update, "no-bbl") == 0)
 751                                 continue;
 752                         if (strcmp(c.update, "byteorder")==0) {
 753                                 if (ss) {
 754                                         pr_err("must not set metadata"
 755                                                " type with --update=byteorder.\n");
 756                                         exit(2);
 757                                 }
 758                                 for(i=0; !ss && superlist[i]; i++)
 759                                         ss = superlist[i]->match_metadata_desc(
 760                                                 "0.swap");
 761                                 if (!ss) {
 762                                         pr_err("INTERNAL ERROR"
 763                                                 " cannot find 0.swap\n");
 764                                         exit(2);
 765                                 }
 766
 767                                 continue;
 768                         }
 769                         if (strcmp(c.update,"?") == 0 ||
 770                             strcmp(c.update, "help") == 0) {
 771                                 outf = stdout;
 772                                 fprintf(outf, Name ": ");
 773                         } else {
 774                                 outf = stderr;
 775                                 fprintf(outf,
 776                                         Name ": '--update=%s' is invalid.  ",
 777                                         c.update);
 778                         }
 779                         fprintf(outf, "Valid --update options are:\n"
 780                 "     'sparc2.2', 'super-minor', 'uuid', 'name', 'resync',\n"
 781                 "     'summaries', 'homehost', 'byteorder', 'devicesize',\n"
 782                 "     'no-bitmap'\n");
 783                         exit(outf == stdout ? 0 : 2);
 784
 785                 case O(MANAGE,'U'):
 786                         /* update=devicesize is allowed with --re-add */
 787                         if (devmode != 'A') {
 788                                 pr_err("--update in Manage mode only"
 789                                         " allowed with --re-add.\n");
 790                                 exit(1);
 791                         }
 792                         if (c.update) {
 793                                 pr_err("Can only update one aspect"
 794                                         " of superblock, both %s and %s given.\n",
 795                                         c.update, optarg);
 796                                 exit(2);
 797                         }
 798                         c.update = optarg;
 799                         if (strcmp(c.update, "devicesize") != 0 &&
 800                             strcmp(c.update, "bbl") != 0 &&
 801                             strcmp(c.update, "no-bbl") != 0) {
 802                                 pr_err("only 'devicesize', 'bbl' and 'no-bbl' can be"
 803                                         " updated with --re-add\n");
 804                                 exit(2);
 805                         }
 806                         continue;
 807
 808                 case O(INCREMENTAL,NoDegraded):
 809                         pr_err("--no-degraded is deprecated in Incremental mode\n");
 810                 case O(ASSEMBLE,NoDegraded): /* --no-degraded */
 811                         c.runstop = -1; /* --stop isn't allowed for --assemble,
 812                                          * so we overload slightly */
 813                         continue;
 814
 815                 case O(ASSEMBLE,'c'):
 816                 case O(ASSEMBLE,ConfigFile):
 817                 case O(INCREMENTAL, 'c'):
 818                 case O(INCREMENTAL, ConfigFile):
 819                 case O(MISC, 'c'):
 820                 case O(MISC, ConfigFile):
 821                 case O(MONITOR,'c'):
 822                 case O(MONITOR,ConfigFile):
 823                         if (configfile) {
 824                                 pr_err("configfile cannot be set twice.  "
 825                                         "Second value is %s.\n", optarg);
 826                                 exit(2);
 827                         }
 828                         configfile = optarg;
 829                         set_conffile(configfile);
 830                         /* FIXME possibly check that config file exists.  Even parse it */
 831                         continue;
 832                 case O(ASSEMBLE,'s'): /* scan */
 833                 case O(MISC,'s'):
 834                 case O(MONITOR,'s'):
 835                 case O(INCREMENTAL,'s'):
 836                         c.scan = 1;
 837                         continue;
 838
 839                 case O(MONITOR,'m'): /* mail address */
 840                 case O(MONITOR,EMail):
 841                         if (mailaddr)
 842                                 pr_err("only specify one mailaddress. %s ignored.\n",
 843                                         optarg);
 844                         else
 845                                 mailaddr = optarg;
 846                         continue;
 847
 848                 case O(MONITOR,'p'): /* alert program */
 849                 case O(MONITOR,ProgramOpt): /* alert program */
 850                         if (program)
 851                                 pr_err("only specify one alter program. %s ignored.\n",
 852                                         optarg);
 853                         else
 854                                 program = optarg;
 855                         continue;
 856
 857                 case O(MONITOR,'r'): /* rebuild increments */
 858                 case O(MONITOR,Increment):
 859                         increments = atoi(optarg);
 860                         if (increments > 99 || increments < 1) {
 861                                 pr_err("please specify positive integer between 1 and 99 as rebuild increments.\n");
 862                                 exit(2);
 863                         }
 864                         continue;
 865
 866                 case O(MONITOR,'d'): /* delay in seconds */
 867                 case O(GROW, 'd'):
 868                 case O(BUILD,'d'): /* delay for bitmap updates */
 869                 case O(CREATE,'d'):
 870                         if (c.delay)
 871                                 pr_err("only specify delay once. %s ignored.\n",
 872                                         optarg);
 873                         else {
 874                                 c.delay = parse_num(optarg);
 875                                 if (c.delay < 1) {
 876                                         pr_err("invalid delay: %s\n",
 877                                                 optarg);
 878                                         exit(2);
 879                                 }
 880                         }
 881                         continue;
 882                 case O(MONITOR,'f'): /* daemonise */
 883                 case O(MONITOR,Fork):
 884                         daemonise = 1;
 885                         continue;
 886                 case O(MONITOR,'i'): /* pid */
 887                         if (pidfile)
 888                                 pr_err("only specify one pid file. %s ignored.\n",
 889                                         optarg);
 890                         else
 891                                 pidfile = optarg;
 892                         continue;
 893                 case O(MONITOR,'1'): /* oneshot */
 894                         oneshot = 1;
 895                         spare_sharing = 0;
 896                         continue;
 897                 case O(MONITOR,'t'): /* test */
 898                         c.test = 1;
 899                         continue;
 900                 case O(MONITOR,'y'): /* log messages to syslog */
 901                         openlog("mdadm", LOG_PID, SYSLOG_FACILITY);
 902                         dosyslog = 1;
 903                         continue;
 904                 case O(MONITOR, NoSharing):
 905                         spare_sharing = 0;
 906                         continue;
 907
 908                         /* now the general management options.  Some are applicable
 909                          * to other modes. None have arguments.
 910                          */
 911                 case O(GROW,'a'):
 912                 case O(GROW,Add):
 913                 case O(MANAGE,'a'):
 914                 case O(MANAGE,Add): /* add a drive */
 915                         devmode = 'a';
 916                         continue;
 917                 case O(MANAGE,ReAdd):
 918                         devmode = 'A';
 919                         continue;
 920                 case O(MANAGE,'r'): /* remove a drive */
 921                 case O(MANAGE,Remove):
 922                         devmode = 'r';
 923                         continue;
 924                 case O(MANAGE,'f'): /* set faulty */
 925                 case O(MANAGE,Fail):
 926                 case O(INCREMENTAL,'f'):
 927                 case O(INCREMENTAL,Remove):
 928                 case O(INCREMENTAL,Fail): /* r for incremental is taken, use f
 929                                            * even though we will both fail and
 930                                            * remove the device */
 931                         devmode = 'f';
 932                         continue;
 933                 case O(MANAGE,Replace):
 934                         /* Mark these devices for replacement */
 935                         devmode = 'R';
 936                         continue;
 937                 case O(MANAGE,With):
 938                         /* These are the replacements to use */
 939                         if (devmode != 'R') {
 940                                 pr_err("--with must follow --replace\n");
 941                                 exit(2);
 942                         }
 943                         devmode = 'W';
 944                         continue;
 945                 case O(INCREMENTAL,'R'):
 946                 case O(MANAGE,'R'):
 947                 case O(ASSEMBLE,'R'):
 948                 case O(BUILD,'R'):
 949                 case O(CREATE,'R'): /* Run the array */
 950                         if (c.runstop < 0) {
 951                                 pr_err("Cannot both Stop and Run an array\n");
 952                                 exit(2);
 953                         }
 954                         c.runstop = 1;
 955                         continue;
 956                 case O(MANAGE,'S'):
 957                         if (c.runstop > 0) {
 958                                 pr_err("Cannot both Run and Stop an array\n");
 959                                 exit(2);
 960                         }
 961                         c.runstop = -1;
 962                         continue;
 963                 case O(MANAGE,'t'):
 964                         c.test = 1;
 965                         continue;
 966
 967                 case O(MISC,'Q'):
 968                 case O(MISC,'D'):
 969                 case O(MISC,'E'):
 970                 case O(MISC,KillOpt):
 971                 case O(MISC,'R'):
 972                 case O(MISC,'S'):
 973                 case O(MISC,'X'):
 974                 case O(MISC,'o'):
 975                 case O(MISC,'w'):
 976                 case O(MISC,'W'):
 977                 case O(MISC, WaitOpt):
 978                 case O(MISC, Waitclean):
 979                 case O(MISC, DetailPlatform):
 980                 case O(MISC, KillSubarray):
 981                 case O(MISC, UpdateSubarray):
 982                         if (opt == KillSubarray || opt == UpdateSubarray) {
 983                                 if (c.subarray) {
 984                                         pr_err("subarray can only"
 985                                                 " be specified once\n");
 986                                         exit(2);
 987                                 }
 988                                 c.subarray = optarg;
 989                         }
 990                         if (devmode && devmode != opt &&
 991                             (devmode == 'E' || (opt == 'E' && devmode != 'Q'))) {
 992                                 pr_err("--examine/-E cannot be given with ");
 993                                 if (devmode == 'E') {
 994                                         if (option_index >= 0)
 995                                                 fprintf(stderr, "--%s\n",
 996                                                         long_options[option_index].name);
 997                                         else
 998                                                 fprintf(stderr, "-%c\n", opt);
 999                                 } else if (isalpha(devmode))
1000                                         fprintf(stderr, "-%c\n", devmode);
1001                                 else
1002                                         fprintf(stderr, "previous option\n");
1003                                 exit(2);
1004                         }
1005                         devmode = opt;
1006                         continue;
1007                 case O(MISC, UdevRules):
1008                         if (devmode && devmode != opt) {
1009                                 pr_err("--udev-rules must"
1010                                        " be the only option.\n");
1011                         } else {
1012                                 if (udev_filename)
1013                                         pr_err("only specify one udev "
1014                                                 "rule filename. %s ignored.\n",
1015                                                 optarg);
1016                                 else
1017                                         udev_filename = optarg;
1018                         }
1019                         devmode = opt;
1020                         continue;
1021                 case O(MISC,'t'):
1022                         c.test = 1;
1023                         continue;
1024
1025                 case O(MISC, Sparc22):
1026                         if (devmode != 'E') {
1027                                 pr_err("--sparc2.2 only allowed with --examine\n");
1028                                 exit(2);
1029                         }
1030                         c.SparcAdjust = 1;
1031                         continue;
1032
1033                 case O(ASSEMBLE,'b'): /* here we simply set the bitmap file */
1034                 case O(ASSEMBLE,Bitmap):
1035                         if (!optarg) {
1036                                 pr_err("bitmap file needed with -b in --assemble mode\n");
1037                                 exit(2);
1038                         }
1039                         if (strcmp(optarg, "internal")==0) {
1040                                 pr_err("there is no need to specify --bitmap when assembling arrays with internal bitmaps\n");
1041                                 continue;
1042                         }
1043                         bitmap_fd = open(optarg, O_RDWR);
1044                         if (!*optarg || bitmap_fd < 0) {
1045                                 pr_err("cannot open bitmap file %s: %s\n", optarg, strerror(errno));
1046                                 exit(2);
1047                         }
1048                         ident.bitmap_fd = bitmap_fd; /* for Assemble */
1049                         continue;
1050
1051                 case O(ASSEMBLE, BackupFile):
1052                 case O(GROW, BackupFile):
1053                         /* Specify a file into which grow might place a backup,
1054                          * or from which assemble might recover a backup
1055                          */
1056                         if (c.backup_file) {
1057                                 pr_err("backup file already specified, rejecting %s\n", optarg);
1058                                 exit(2);
1059                         }
1060                         c.backup_file = optarg;
1061                         continue;
1062
1063                 case O(GROW, Continue):
1064                         /* Continue interrupted grow
1065                          */
1066                         grow_continue = 1;
1067                         continue;
1068                 case O(ASSEMBLE, InvalidBackup):
1069                         /* Acknowledge that the backupfile is invalid, but ask
1070                          * to continue anyway
1071                          */
1072                         c.invalid_backup = 1;
1073                         continue;
1074
1075                 case O(BUILD,'b'):
1076                 case O(BUILD,Bitmap):
1077                 case O(CREATE,'b'):
1078                 case O(CREATE,Bitmap): /* here we create the bitmap */
1079                         if (strcmp(optarg, "none") == 0) {
1080                                 pr_err("'--bitmap none' only"
1081                                         " supported for --grow\n");
1082                                 exit(2);
1083                         }
1084                         /* FALL THROUGH */
1085                 case O(GROW,'b'):
1086                 case O(GROW,Bitmap):
1087                         if (strcmp(optarg, "internal")== 0 ||
1088                             strcmp(optarg, "none")== 0 ||
1089                             strchr(optarg, '/') != NULL) {
1090                                 s.bitmap_file = optarg;
1091                                 continue;
1092                         }
1093                         /* probable typo */
1094                         pr_err("bitmap file must contain a '/', or be 'internal', or 'none'\n"
1095                                 "       not '%s'\n", optarg);
1096                         exit(2);
1097
1098                 case O(GROW,BitmapChunk):
1099                 case O(BUILD,BitmapChunk):
1100                 case O(CREATE,BitmapChunk): /* bitmap chunksize */
1101                         s.bitmap_chunk = parse_size(optarg);
1102                         if (s.bitmap_chunk == 0 ||
1103                             s.bitmap_chunk == INVALID_SECTORS ||
1104                             s.bitmap_chunk & (s.bitmap_chunk - 1)) {
1105                                 pr_err("invalid bitmap chunksize: %s\n",
1106                                        optarg);
1107                                 exit(2);
1108                         }
1109                         s.bitmap_chunk = s.bitmap_chunk * 512;
1110                         continue;
1111
1112                 case O(GROW, WriteBehind):
1113                 case O(BUILD, WriteBehind):
1114                 case O(CREATE, WriteBehind): /* write-behind mode */
1115                         s.write_behind = DEFAULT_MAX_WRITE_BEHIND;
1116                         if (optarg) {
1117                                 s.write_behind = parse_num(optarg);
1118                                 if (s.write_behind < 0 ||
1119                                     s.write_behind > 16383) {
1120                                         pr_err("Invalid value for maximum outstanding write-behind writes: %s.\n\tMust be between 0 and 16383.\n", optarg);
1121                                         exit(2);
1122                                 }
1123                         }
1124                         continue;
1125
1126                 case O(INCREMENTAL, 'r'):
1127                 case O(INCREMENTAL, RebuildMapOpt):
1128                         rebuild_map = 1;
1129                         continue;
1130                 case O(INCREMENTAL, IncrementalPath):
1131                         remove_path = optarg;
1132                         continue;
1133                 }
1134                 /* We have now processed all the valid options. Anything else is
1135                  * an error
1136                  */
1137                 if (option_index > 0)
1138                         pr_err(":option --%s not valid in %s mode\n",
1139                                 long_options[option_index].name,
1140                                 map_num(modes, mode));
1141                 else
1142                         pr_err("option -%c not valid in %s mode\n",
1143                                 opt, map_num(modes, mode));
1144                 exit(2);
1145
1146         }
1147
1148         if (print_help) {
1149                 char *help_text;
1150                 if (print_help == 2)
1151                         help_text = OptionHelp;
1152                 else
1153                         help_text = mode_help[mode];
1154                 if (help_text == NULL)
1155                         help_text = Help;
1156                 fputs(help_text,stdout);
1157                 exit(0);
1158         }
1159
1160         if (!mode && devs_found) {
1161                 mode = MISC;
1162                 devmode = 'Q';
1163                 if (devlist->disposition == 0)
1164                         devlist->disposition = devmode;
1165         }
1166         if (!mode) {
1167                 fputs(Usage, stderr);
1168                 exit(2);
1169         }
1170
1171         if (symlinks) {
1172                 struct createinfo *ci = conf_get_create_info();
1173
1174                 if (strcasecmp(symlinks, "yes") == 0)
1175                         ci->symlinks = 1;
1176                 else if (strcasecmp(symlinks, "no") == 0)
1177                         ci->symlinks = 0;
1178                 else {
1179                         pr_err("option --symlinks must be 'no' or 'yes'\n");
1180                         exit(2);
1181                 }
1182         }
1183         /* Ok, got the option parsing out of the way
1184          * hopefully it's mostly right but there might be some stuff
1185          * missing
1186          *
1187          * That is mosty checked in the per-mode stuff but...
1188          *
1189          * For @,B,C and A without -s, the first device listed must be
1190          * an md device.  We check that here and open it.
1191          */
1192
1193         if (mode == MANAGE || mode == BUILD || mode == CREATE
1194             || mode == GROW
1195             || (mode == ASSEMBLE && ! c.scan)) {
1196                 if (devs_found < 1) {
1197                         pr_err("an md device must be given in this mode\n");
1198                         exit(2);
1199                 }
1200                 if ((int)ident.super_minor == -2 && c.autof) {
1201                         pr_err("--super-minor=dev is incompatible with --auto\n");
1202                         exit(2);
1203                 }
1204                 if (mode == MANAGE || mode == GROW) {
1205                         mdfd = open_mddev(devlist->devname, 1);
1206                         if (mdfd < 0)
1207                                 exit(1);
1208                 } else
1209                         /* non-existent device is OK */
1210                         mdfd = open_mddev(devlist->devname, 0);
1211                 if (mdfd == -2) {
1212                         pr_err("device %s exists but is not an "
1213                                 "md array.\n", devlist->devname);
1214                         exit(1);
1215                 }
1216                 if ((int)ident.super_minor == -2) {
1217                         struct stat stb;
1218                         if (mdfd < 0) {
1219                                 pr_err("--super-minor=dev given, and "
1220                                         "listed device %s doesn't exist.\n",
1221                                         devlist->devname);
1222                                 exit(1);
1223                         }
1224                         fstat(mdfd, &stb);
1225                         ident.super_minor = minor(stb.st_rdev);
1226                 }
1227                 if (mdfd >= 0 && mode != MANAGE && mode != GROW) {
1228                         /* We don't really want this open yet, we just might
1229                          * have wanted to check some things
1230                          */
1231                         close(mdfd);
1232                         mdfd = -1;
1233                 }
1234         }
1235
1236         if (s.raiddisks) {
1237                 if (s.raiddisks == 1 &&  !c.force && s.level != LEVEL_FAULTY) {
1238                         pr_err("'1' is an unusual number of drives for an array, so it is probably\n"
1239                                 "     a mistake.  If you really mean it you will need to specify --force before\n"
1240                                 "     setting the number of drives.\n");
1241                         exit(2);
1242                 }
1243         }
1244
1245         if (c.homehost == NULL)
1246                 c.homehost = conf_get_homehost(&c.require_homehost);
1247         if (c.homehost == NULL || strcasecmp(c.homehost, "<system>")==0) {
1248                 if (gethostname(sys_hostname, sizeof(sys_hostname)) == 0) {
1249                         sys_hostname[sizeof(sys_hostname)-1] = 0;
1250                         c.homehost = sys_hostname;
1251                 }
1252         }
1253         if (c.homehost && (!c.homehost[0] || strcasecmp(c.homehost, "<none>") == 0)) {
1254                 c.homehost = NULL;
1255                 c.require_homehost = 0;
1256         }
1257
1258         if ((mode == MISC && devmode == 'E')
1259             || (mode == MONITOR && spare_sharing == 0))
1260                 /* Anyone may try this */;
1261         else if (geteuid() != 0) {
1262                 pr_err("must be super-user to perform this action\n");
1263                 exit(1);
1264         }
1265
1266         ident.autof = c.autof;
1267
1268         if (c.scan && c.verbose < 2)
1269                 /* --scan implied --brief unless -vv */
1270                 c.brief = 1;
1271
1272         rv = 0;
1273         switch(mode) {
1274         case MANAGE:
1275                 /* readonly, add/remove, readwrite, runstop */
1276                 if (c.readonly > 0)
1277                         rv = Manage_ro(devlist->devname, mdfd, c.readonly);
1278                 if (!rv && devs_found>1)
1279                         rv = Manage_subdevs(devlist->devname, mdfd,
1280                                             devlist->next, c.verbose, c.test,
1281                                             c.update, c.force);
1282                 if (!rv && c.readonly < 0)
1283                         rv = Manage_ro(devlist->devname, mdfd, c.readonly);
1284                 if (!rv && c.runstop)
1285                         rv = Manage_runstop(devlist->devname, mdfd, c.runstop, c.verbose, 0);
1286                 break;
1287         case ASSEMBLE:
1288                 if (devs_found == 1 && ident.uuid_set == 0 &&
1289                     ident.super_minor == UnSet && ident.name[0] == 0 && !c.scan ) {
1290                         /* Only a device has been given, so get details from config file */
1291                         struct mddev_ident *array_ident = conf_get_ident(devlist->devname);
1292                         if (array_ident == NULL) {
1293                                 pr_err("%s not identified in config file.\n",
1294                                         devlist->devname);
1295                                 rv |= 1;
1296                                 if (mdfd >= 0)
1297                                         close(mdfd);
1298                         } else {
1299                                 if (array_ident->autof == 0)
1300                                         array_ident->autof = c.autof;
1301                                 rv |= Assemble(ss, devlist->devname, array_ident,
1302                                                NULL, &c);
1303                         }
1304                 } else if (!c.scan)
1305                         rv = Assemble(ss, devlist->devname, &ident,
1306                                       devlist->next, &c);
1307                 else if (devs_found > 0) {
1308                         if (c.update && devs_found > 1) {
1309                                 pr_err("can only update a single array at a time\n");
1310                                 exit(1);
1311                         }
1312                         if (c.backup_file && devs_found > 1) {
1313                                 pr_err("can only assemble a single array when providing a backup file.\n");
1314                                 exit(1);
1315                         }
1316                         for (dv = devlist ; dv ; dv=dv->next) {
1317                                 struct mddev_ident *array_ident = conf_get_ident(dv->devname);
1318                                 if (array_ident == NULL) {
1319                                         pr_err("%s not identified in config file.\n",
1320                                                 dv->devname);
1321                                         rv |= 1;
1322                                         continue;
1323                                 }
1324                                 if (array_ident->autof == 0)
1325                                         array_ident->autof = c.autof;
1326                                 rv |= Assemble(ss, dv->devname, array_ident,
1327                                                NULL, &c);
1328                         }
1329                 } else {
1330                         if (c.update) {
1331                                 pr_err("--update not meaningful with a --scan assembly.\n");
1332                                 exit(1);
1333                         }
1334                         if (c.backup_file) {
1335                                 pr_err("--backup_file not meaningful with a --scan assembly.\n");
1336                                 exit(1);
1337                         }
1338                         rv = scan_assemble(ss, &c, &ident);
1339                 }
1340
1341                 break;
1342         case BUILD:
1343                 if (c.delay == 0)
1344                         c.delay = DEFAULT_BITMAP_DELAY;
1345                 if (s.write_behind && !s.bitmap_file) {
1346                         pr_err("write-behind mode requires a bitmap.\n");
1347                         rv = 1;
1348                         break;
1349                 }
1350                 if (s.raiddisks == 0) {
1351                         pr_err("no raid-devices specified.\n");
1352                         rv = 1;
1353                         break;
1354                 }
1355
1356                 if (s.bitmap_file) {
1357                         if (strcmp(s.bitmap_file, "internal")==0) {
1358                                 pr_err("'internal' bitmaps not supported with --build\n");
1359                                 rv |= 1;
1360                                 break;
1361                         }
1362                 }
1363                 rv = Build(devlist->devname, devlist->next, &s, &c);
1364                 break;
1365         case CREATE:
1366                 if (c.delay == 0)
1367                         c.delay = DEFAULT_BITMAP_DELAY;
1368                 if (s.write_behind && !s.bitmap_file) {
1369                         pr_err("write-behind mode requires a bitmap.\n");
1370                         rv = 1;
1371                         break;
1372                 }
1373                 if (s.raiddisks == 0) {
1374                         pr_err("no raid-devices specified.\n");
1375                         rv = 1;
1376                         break;
1377                 }
1378
1379                 rv = Create(ss, devlist->devname,
1380                             ident.name, ident.uuid_set ? ident.uuid : NULL,
1381                             devs_found-1, devlist->next,
1382                             &s, &c, data_offset);
1383                 break;
1384         case MISC:
1385                 if (devmode == 'E') {
1386                         if (devlist == NULL && !c.scan) {
1387                                 pr_err("No devices to examine\n");
1388                                 exit(2);
1389                         }
1390                         if (devlist == NULL)
1391                                 devlist = conf_get_devs();
1392                         if (devlist == NULL) {
1393                                 pr_err("No devices listed in %s\n", configfile?configfile:DefaultConfFile);
1394                                 exit(1);
1395                         }
1396                         rv = Examine(devlist, &c, ss);
1397                 } else if (devmode == DetailPlatform) {
1398                         rv = Detail_Platform(ss ? ss->ss : NULL, ss ? c.scan : 1,
1399                                              c.verbose, c.export,
1400                                              devlist ? devlist->devname : NULL);
1401                 } else if (devlist == NULL) {
1402                         if (devmode == 'S' && c.scan)
1403                                 rv = stop_scan(c.verbose);
1404                         else if ((devmode == 'D' || devmode == Waitclean) && c.scan)
1405                                 rv = misc_scan(devmode, &c);
1406                         else if (devmode == UdevRules)
1407                                 rv = Write_rules(udev_filename);
1408                         else {
1409                                 pr_err("No devices given.\n");
1410                                 exit(2);
1411                         }
1412                 } else
1413                         rv = misc_list(devlist, &ident, ss, &c);
1414                 break;
1415         case MONITOR:
1416                 if (!devlist && !c.scan) {
1417                         pr_err("Cannot monitor: need --scan or at least one device\n");
1418                         rv = 1;
1419                         break;
1420                 }
1421                 if (pidfile && !daemonise) {
1422                         pr_err("Cannot write a pid file when not in daemon mode\n");
1423                         rv = 1;
1424                         break;
1425                 }
1426                 if (c.delay == 0) {
1427                         if (get_linux_version() > 2006016)
1428                                 /* mdstat responds to poll */
1429                                 c.delay = 1000;
1430                         else
1431                                 c.delay = 60;
1432                 }
1433                 if (c.delay == 0)
1434                         c.delay = 60;
1435                 rv= Monitor(devlist, mailaddr, program,
1436                             &c, daemonise, oneshot,
1437                             dosyslog, pidfile, increments,
1438                             spare_sharing);
1439                 break;
1440
1441         case GROW:
1442                 if (array_size > 0) {
1443                         /* alway impose array size first, independent of
1444                          * anything else
1445                          * Do not allow level or raid_disks changes at the
1446                          * same time as that can be irreversibly destructive.
1447                          */
1448                         struct mdinfo sra;
1449                         int err;
1450                         if (s.raiddisks || s.level != UnSet) {
1451                                 pr_err("cannot change array size in same operation "
1452                                         "as changing raiddisks or level.\n"
1453                                         "    Change size first, then check that data is still intact.\n");
1454                                 rv = 1;
1455                                 break;
1456                         }
1457                         sysfs_init(&sra, mdfd, 0);
1458                         if (array_size == MAX_SIZE)
1459                                 err = sysfs_set_str(&sra, NULL, "array_size", "default");
1460                         else
1461                                 err = sysfs_set_num(&sra, NULL, "array_size", array_size / 2);
1462                         if (err < 0) {
1463                                 if (errno == E2BIG)
1464                                         pr_err("--array-size setting"
1465                                                 " is too large.\n");
1466                                 else
1467                                         pr_err("current kernel does"
1468                                                 " not support setting --array-size\n");
1469                                 rv = 1;
1470                                 break;
1471                         }
1472                 }
1473                 if (devs_found > 1 && s.raiddisks == 0) {
1474                         /* must be '-a'. */
1475                         if (s.size > 0 || s.chunk || s.layout_str != NULL || s.bitmap_file) {
1476                                 pr_err("--add cannot be used with "
1477                                         "other geometry changes in --grow mode\n");
1478                                 rv = 1;
1479                                 break;
1480                         }
1481                         for (dv=devlist->next; dv ; dv=dv->next) {
1482                                 rv = Grow_Add_device(devlist->devname, mdfd,
1483                                                      dv->devname);
1484                                 if (rv)
1485                                         break;
1486                         }
1487                 } else if (s.bitmap_file) {
1488                         if (s.size > 0 || s.raiddisks || s.chunk ||
1489                             s.layout_str != NULL || devs_found > 1) {
1490                                 pr_err("--bitmap changes cannot be "
1491                                         "used with other geometry changes "
1492                                         "in --grow mode\n");
1493                                 rv = 1;
1494                                 break;
1495                         }
1496                         if (c.delay == 0)
1497                                 c.delay = DEFAULT_BITMAP_DELAY;
1498                         rv = Grow_addbitmap(devlist->devname, mdfd, &c, &s);
1499                 } else if (grow_continue)
1500                         rv = Grow_continue_command(devlist->devname,
1501                                                    mdfd, c.backup_file,
1502                                                    c.verbose);
1503                 else if (s.size > 0 || s.raiddisks || s.layout_str != NULL
1504                          || s.chunk != 0 || s.level != UnSet) {
1505                         rv = Grow_reshape(devlist->devname, mdfd,
1506                                           devlist->next,
1507                                           data_offset, &c, &s);
1508                 } else if (array_size == 0)
1509                         pr_err("no changes to --grow\n");
1510                 break;
1511         case INCREMENTAL:
1512                 if (rebuild_map) {
1513                         RebuildMap();
1514                 }
1515                 if (c.scan) {
1516                         if (c.runstop <= 0) {
1517                                 pr_err("--incremental --scan meaningless without --run.\n");
1518                                 break;
1519                         }
1520                         if (devmode == 'f') {
1521                                 pr_err("--incremental --scan --fail not supported.\n");
1522                                 break;
1523                         }
1524                         rv = IncrementalScan(c.verbose);
1525                 }
1526                 if (!devlist) {
1527                         if (!rebuild_map && !c.scan) {
1528                                 pr_err("--incremental requires a device.\n");
1529                                 rv = 1;
1530                         }
1531                         break;
1532                 }
1533                 if (devlist->next) {
1534                         pr_err("--incremental can only handle one device.\n");
1535                         rv = 1;
1536                         break;
1537                 }
1538                 if (devmode == 'f')
1539                         rv = IncrementalRemove(devlist->devname, remove_path,
1540                                                c.verbose);
1541                 else
1542                         rv = Incremental(devlist->devname, &c, ss);
1543                 break;
1544         case AUTODETECT:
1545                 autodetect();
1546                 break;
1547         }
1548         exit(rv);
1549 }
1550
1551 static int scan_assemble(struct supertype *ss,
1552                          struct context *c,
1553                          struct mddev_ident *ident)
1554 {
1555         struct mddev_ident *a, *array_list =  conf_get_ident(NULL);
1556         struct mddev_dev *devlist = conf_get_devs();
1557         struct map_ent *map = NULL;
1558         int cnt = 0;
1559         int rv = 0;
1560         int failures, successes;
1561
1562         if (conf_verify_devnames(array_list)) {
1563                 pr_err("Duplicate MD device names in "
1564                        "conf file were found.\n");
1565                 return 1;
1566         }
1567         if (devlist == NULL) {
1568                 pr_err("No devices listed in conf file were found.\n");
1569                 return 1;
1570         }
1571         for (a = array_list; a ; a = a->next) {
1572                 a->assembled = 0;
1573                 if (a->autof == 0)
1574                         a->autof = c->autof;
1575         }
1576         if (map_lock(&map))
1577                 pr_err("%s: failed to get "
1578                        "exclusive lock on mapfile\n",
1579                        __func__);
1580         do {
1581                 failures = 0;
1582                 successes = 0;
1583                 rv = 0;
1584                 for (a = array_list; a ; a = a->next) {
1585                         int r;
1586                         if (a->assembled)
1587                                 continue;
1588                         if (a->devname &&
1589                             strcasecmp(a->devname, "<ignore>") == 0)
1590                                 continue;
1591
1592                         r = Assemble(ss, a->devname,
1593                                      a, NULL, c);
1594                         if (r == 0) {
1595                                 a->assembled = 1;
1596                                 successes++;
1597                         } else
1598                                 failures++;
1599                         rv |= r;
1600                         cnt++;
1601                 }
1602         } while (failures && successes);
1603         if (c->homehost && cnt == 0) {
1604                 /* Maybe we can auto-assemble something.
1605                  * Repeatedly call Assemble in auto-assemble mode
1606                  * until it fails
1607                  */
1608                 int rv2;
1609                 int acnt;
1610                 ident->autof = c->autof;
1611                 do {
1612                         struct mddev_dev *devlist = conf_get_devs();
1613                         acnt = 0;
1614                         do {
1615                                 rv2 = Assemble(ss, NULL,
1616                                                ident,
1617                                                devlist, c);
1618                                 if (rv2==0) {
1619                                         cnt++;
1620                                         acnt++;
1621                                 }
1622                         } while (rv2!=2);
1623                         /* Incase there are stacked devices, we need to go around again */
1624                 } while (acnt);
1625                 if (cnt == 0 && rv == 0) {
1626                         pr_err("No arrays found in config file or automatically\n");
1627                         rv = 1;
1628                 } else if (cnt)
1629                         rv = 0;
1630         } else if (cnt == 0 && rv == 0) {
1631                 pr_err("No arrays found in config file\n");
1632                 rv = 1;
1633         }
1634         map_unlock(&map);
1635         return rv;
1636 }
1637
1638 static int misc_scan(char devmode, struct context *c)
1639 {
1640         /* apply --detail or --wait-clean to
1641          * all devices in /proc/mdstat
1642          */
1643         struct mdstat_ent *ms = mdstat_read(0, 1);
1644         struct mdstat_ent *e;
1645         struct map_ent *map = NULL;
1646         int members;
1647         int rv = 0;
1648
1649         for (members = 0; members <= 1; members++) {
1650                 for (e=ms ; e ; e=e->next) {
1651                         char *name;
1652                         struct map_ent *me;
1653                         int member = e->metadata_version &&
1654                                 strncmp(e->metadata_version,
1655                                         "external:/", 10) == 0;
1656                         if (members != member)
1657                                 continue;
1658                         me = map_by_devnum(&map, e->devnum);
1659                         if (me && me->path
1660                             && strcmp(me->path, "/unknown") != 0)
1661                                 name = me->path;
1662                         else
1663                                 name = get_md_name(e->devnum);
1664
1665                         if (!name) {
1666                                 pr_err("cannot find device file for %s\n",
1667                                         e->dev);
1668                                 continue;
1669                         }
1670                         if (devmode == 'D')
1671                                 rv |= Detail(name, c);
1672                         else
1673                                 rv |= WaitClean(name, -1, c->verbose);
1674                         put_md_name(name);
1675                 }
1676         }
1677         free_mdstat(ms);
1678         return rv;
1679 }
1680
1681 static int stop_scan(int verbose)
1682 {
1683         /* apply --stop to all devices in /proc/mdstat */
1684         /* Due to possible stacking of devices, repeat until
1685          * nothing more can be stopped
1686          */
1687         int progress=1, err;
1688         int last = 0;
1689         int rv = 0;
1690         do {
1691                 struct mdstat_ent *ms = mdstat_read(0, 0);
1692                 struct mdstat_ent *e;
1693
1694                 if (!progress) last = 1;
1695                 progress = 0; err = 0;
1696                 for (e=ms ; e ; e=e->next) {
1697                         char *name = get_md_name(e->devnum);
1698                         int mdfd;
1699
1700                         if (!name) {
1701                                 pr_err("cannot find device file for %s\n",
1702                                         e->dev);
1703                                 continue;
1704                         }
1705                         mdfd = open_mddev(name, 1);
1706                         if (mdfd >= 0) {
1707                                 if (Manage_runstop(name, mdfd, -1, verbose, !last))
1708                                         err = 1;
1709                                 else
1710                                         progress = 1;
1711                                 close(mdfd);
1712                         }
1713
1714                         put_md_name(name);
1715                 }
1716                 free_mdstat(ms);
1717         } while (!last && err);
1718         if (err)
1719                 rv |= 1;
1720         return rv;
1721 }
1722
1723 static int misc_list(struct mddev_dev *devlist,
1724                      struct mddev_ident *ident,
1725                      struct supertype *ss, struct context *c)
1726 {
1727         struct mddev_dev *dv;
1728         int rv = 0;
1729
1730         for (dv=devlist ; dv; dv=dv->next) {
1731                 int mdfd;
1732
1733                 switch(dv->disposition) {
1734                 case 'D':
1735                         rv |= Detail(dv->devname, c);
1736                         continue;
1737                 case KillOpt: /* Zero superblock */
1738                         if (ss)
1739                                 rv |= Kill(dv->devname, ss, c->force, c->verbose,0);
1740                         else {
1741                                 int v = c->verbose;
1742                                 do {
1743                                         rv |= Kill(dv->devname, NULL, c->force, v, 0);
1744                                         v = -1;
1745                                 } while (rv == 0);
1746                                 rv &= ~2;
1747                         }
1748                         continue;
1749                 case 'Q':
1750                         rv |= Query(dv->devname); continue;
1751                 case 'X':
1752                         rv |= ExamineBitmap(dv->devname, c->brief, ss); continue;
1753                 case 'W':
1754                 case WaitOpt:
1755                         rv |= Wait(dv->devname); continue;
1756                 case Waitclean:
1757                         rv |= WaitClean(dv->devname, -1, c->verbose); continue;
1758                 case KillSubarray:
1759                         rv |= Kill_subarray(dv->devname, c->subarray, c->verbose);
1760                         continue;
1761                 case UpdateSubarray:
1762                         if (c->update == NULL) {
1763                                 pr_err("-U/--update must be specified with --update-subarray\n");
1764                                 rv |= 1;
1765                                 continue;
1766                         }
1767                         rv |= Update_subarray(dv->devname, c->subarray,
1768                                               c->update, ident, c->verbose);
1769                         continue;
1770                 }
1771                 mdfd = open_mddev(dv->devname, 1);
1772                 if (mdfd>=0) {
1773                         switch(dv->disposition) {
1774                         case 'R':
1775                                 rv |= Manage_runstop(dv->devname, mdfd, 1, c->verbose, 0); break;
1776                         case 'S':
1777                                 rv |= Manage_runstop(dv->devname, mdfd, -1, c->verbose, 0); break;
1778                         case 'o':
1779                                 rv |= Manage_ro(dv->devname, mdfd, 1); break;
1780                         case 'w':
1781                                 rv |= Manage_ro(dv->devname, mdfd, -1); break;
1782                         }
1783                         close(mdfd);
1784                 } else
1785                         rv |= 1;
1786         }
1787         return rv;
1788 }