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                      char *dump_directory,
  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         unsigned long long array_size = 0;
  53         unsigned long long data_offset = INVALID_SECTORS;
  54         struct mddev_ident ident;
  55         char *configfile = NULL;
  56         int devmode = 0;
  57         int bitmap_fd = -1;
  58         struct mddev_dev *devlist = NULL;
  59         struct mddev_dev **devlistend = & devlist;
  60         struct mddev_dev *dv;
  61         int devs_found = 0;
  62         char *symlinks = NULL;
  63         int grow_continue = 0;
  64         /* autof indicates whether and how to create device node.
  65          * bottom 3 bits are style.  Rest (when shifted) are number of parts
  66          * 0  - unset
  67          * 1  - don't create (no)
  68          * 2  - if is_standard, then create (yes)
  69          * 3  - create as 'md' - reject is_standard mdp (md)
  70          * 4  - create as 'mdp' - reject is_standard md (mdp)
  71          * 5  - default to md if not is_standard (md in config file)
  72          * 6  - default to mdp if not is_standard (part, or mdp in config file)
  73          */
  74         struct context c = {
  75                 .require_homehost = 1,
  76         };
  77         struct shape s = {
  78                 .level          = UnSet,
  79                 .layout         = UnSet,
  80                 .bitmap_chunk   = UnSet,
  81         };
  82
  83         char sys_hostname[256];
  84         char *mailaddr = NULL;
  85         char *program = NULL;
  86         int increments = 20;
  87         int daemonise = 0;
  88         char *pidfile = NULL;
  89         int oneshot = 0;
  90         int spare_sharing = 1;
  91         struct supertype *ss = NULL;
  92         int writemostly = 0;
  93         char *shortopt = short_options;
  94         int dosyslog = 0;
  95         int rebuild_map = 0;
  96         char *remove_path = NULL;
  97         char *udev_filename = NULL;
  98         char *dump_directory = NULL;
  99
 100         int print_help = 0;
 101         FILE *outf;
 102
 103         int mdfd = -1;
 104
 105         srandom(time(0) ^ getpid());
 106
 107         ident.uuid_set=0;
 108         ident.level = UnSet;
 109         ident.raid_disks = UnSet;
 110         ident.super_minor= UnSet;
 111         ident.devices=0;
 112         ident.spare_group = NULL;
 113         ident.autof = 0;
 114         ident.st = NULL;
 115         ident.bitmap_fd = -1;
 116         ident.bitmap_file = NULL;
 117         ident.name[0] = 0;
 118         ident.container = NULL;
 119         ident.member = NULL;
 120
 121         /*
 122          * set first char of argv[0] to @. This is used by
 123          * systemd to signal that the task was launched from
 124          * initrd/initramfs and should be preserved during shutdown
 125          */
 126         argv[0][0] = '@';
 127
 128         while ((option_index = -1) ,
 129                (opt=getopt_long(argc, argv,
 130                                 shortopt, long_options,
 131                                 &option_index)) != -1) {
 132                 int newmode = mode;
 133                 /* firstly, some mode-independent options */
 134                 switch(opt) {
 135                 case HelpOptions:
 136                         print_help = 2;
 137                         continue;
 138                 case 'h':
 139                         print_help = 1;
 140                         continue;
 141
 142                 case 'V':
 143                         fputs(Version, stderr);
 144                         exit(0);
 145
 146                 case 'v': c.verbose++;
 147                         continue;
 148
 149                 case 'q': c.verbose--;
 150                         continue;
 151
 152                 case 'b':
 153                         if (mode == ASSEMBLE || mode == BUILD || mode == CREATE
 154                             || mode == GROW || mode == INCREMENTAL
 155                             || mode == MANAGE)
 156                                 break; /* b means bitmap */
 157                 case Brief:
 158                         c.brief = 1;
 159                         continue;
 160
 161                 case 'Y': c.export++;
 162                         continue;
 163
 164                 case HomeHost:
 165                         if (strcasecmp(optarg, "<ignore>") == 0)
 166                                 c.require_homehost = 0;
 167                         else
 168                                 c.homehost = optarg;
 169                         continue;
 170
 171                 case OffRootOpt:
 172                         /* Silently ignore old option */
 173                         continue;
 174
 175                 case Prefer:
 176                         if (c.prefer)
 177                                 free(c.prefer);
 178                         if (asprintf(&c.prefer, "/%s/", optarg) <= 0)
 179                                 c.prefer = NULL;
 180                         continue;
 181
 182                 case ':':
 183                 case '?':
 184                         fputs(Usage, stderr);
 185                         exit(2);
 186                 }
 187                 /* second, figure out the mode.
 188                  * Some options force the mode.  Others
 189                  * set the mode if it isn't already
 190                  */
 191
 192                 switch(opt) {
 193                 case ManageOpt:
 194                         newmode = MANAGE;
 195                         shortopt = short_bitmap_options;
 196                         break;
 197                 case 'a':
 198                 case Add:
 199                 case 'r':
 200                 case Remove:
 201                 case Replace:
 202                 case With:
 203                 case 'f':
 204                 case Fail:
 205                 case ReAdd: /* re-add */
 206                         if (!mode) {
 207                                 newmode = MANAGE;
 208                                 shortopt = short_bitmap_options;
 209                         }
 210                         break;
 211
 212                 case 'A': newmode = ASSEMBLE;
 213                         shortopt = short_bitmap_auto_options;
 214                         break;
 215                 case 'B': newmode = BUILD;
 216                         shortopt = short_bitmap_auto_options;
 217                         break;
 218                 case 'C': newmode = CREATE;
 219                         shortopt = short_bitmap_auto_options;
 220                         break;
 221                 case 'F': newmode = MONITOR;
 222                         break;
 223                 case 'G': newmode = GROW;
 224                         shortopt = short_bitmap_options;
 225                         break;
 226                 case 'I': newmode = INCREMENTAL;
 227                         shortopt = short_bitmap_auto_options;
 228                         break;
 229                 case AutoDetect:
 230                         newmode = AUTODETECT;
 231                         break;
 232
 233                 case MiscOpt:
 234                 case 'D':
 235                 case 'E':
 236                 case 'X':
 237                 case 'Q':
 238                 case ExamineBB:
 239                 case Dump:
 240                 case Restore:
 241                         newmode = MISC;
 242                         break;
 243
 244                 case 'R':
 245                 case 'S':
 246                 case 'o':
 247                 case 'w':
 248                 case 'W':
 249                 case WaitOpt:
 250                 case Waitclean:
 251                 case DetailPlatform:
 252                 case KillSubarray:
 253                 case UpdateSubarray:
 254                 case UdevRules:
 255                 case KillOpt:
 256                         if (!mode)
 257                                 newmode = MISC;
 258                         break;
 259
 260                 case NoSharing:
 261                         newmode = MONITOR;
 262                         break;
 263                 }
 264                 if (mode && newmode == mode) {
 265                         /* everybody happy ! */
 266                 } else if (mode && newmode != mode) {
 267                         /* not allowed.. */
 268                         pr_err("");
 269                         if (option_index >= 0)
 270                                 fprintf(stderr, "--%s", long_options[option_index].name);
 271                         else
 272                                 fprintf(stderr, "-%c", opt);
 273                         fprintf(stderr, " would set mdadm mode to \"%s\", but it is already set to \"%s\".\n",
 274                                 map_num(modes, newmode),
 275                                 map_num(modes, mode));
 276                         exit(2);
 277                 } else if (!mode && newmode) {
 278                         mode = newmode;
 279                         if (mode == MISC && devs_found) {
 280                                 pr_err("No action given for %s in --misc mode\n",
 281                                         devlist->devname);
 282                                 cont_err("Action options must come before device names\n");
 283                                 exit(2);
 284                         }
 285                 } else {
 286                         /* special case of -c --help */
 287                         if ((opt == 'c' || opt == ConfigFile) &&
 288                             ( strncmp(optarg, "--h", 3)==0 ||
 289                               strncmp(optarg, "-h", 2)==0)) {
 290                                 fputs(Help_config, stdout);
 291                                 exit(0);
 292                         }
 293
 294                         /* If first option is a device, don't force the mode yet */
 295                         if (opt == 1) {
 296                                 if (devs_found == 0) {
 297                                         dv = xmalloc(sizeof(*dv));
 298                                         dv->devname = optarg;
 299                                         dv->disposition = devmode;
 300                                         dv->writemostly = writemostly;
 301                                         dv->used = 0;
 302                                         dv->next = NULL;
 303                                         *devlistend = dv;
 304                                         devlistend = &dv->next;
 305
 306                                         devs_found++;
 307                                         continue;
 308                                 }
 309                                 /* No mode yet, and this is the second device ... */
 310                                 pr_err("An option must be given to set the mode before a second device\n"
 311                                         "       (%s) is listed\n", optarg);
 312                                 exit(2);
 313                         }
 314                         if (option_index >= 0)
 315                                 pr_err("--%s", long_options[option_index].name);
 316                         else
 317                                 pr_err("-%c", opt);
 318                         fprintf(stderr, " does not set the mode, and so cannot be the first option.\n");
 319                         exit(2);
 320                 }
 321
 322                 /* if we just set the mode, then done */
 323                 switch(opt) {
 324                 case ManageOpt:
 325                 case MiscOpt:
 326                 case 'A':
 327                 case 'B':
 328                 case 'C':
 329                 case 'F':
 330                 case 'G':
 331                 case 'I':
 332                 case AutoDetect:
 333                         continue;
 334                 }
 335                 if (opt == 1) {
 336                         /* an undecorated option - must be a device name.
 337                          */
 338
 339                         if (devs_found > 0 && devmode == DetailPlatform) {
 340                                 pr_err("controller may only be specified once. %s ignored\n",
 341                                                 optarg);
 342                                 continue;
 343                         }
 344
 345                         if (devs_found > 0 && mode == MANAGE && !devmode) {
 346                                 pr_err("Must give one of -a/-r/-f"
 347                                         " for subsequent devices at %s\n", optarg);
 348                                 exit(2);
 349                         }
 350                         if (devs_found > 0 && mode == GROW && !devmode) {
 351                                 pr_err("Must give -a/--add for"
 352                                        " devices to add: %s\n", optarg);
 353                                 exit(2);
 354                         }
 355                         dv = xmalloc(sizeof(*dv));
 356                         dv->devname = optarg;
 357                         dv->disposition = devmode;
 358                         dv->writemostly = writemostly;
 359                         dv->used = 0;
 360                         dv->next = NULL;
 361                         *devlistend = dv;
 362                         devlistend = &dv->next;
 363
 364                         devs_found++;
 365                         continue;
 366                 }
 367
 368                 /* We've got a mode, and opt is now something else which
 369                  * could depend on the mode */
 370 #define O(a,b) ((a<<16)|b)
 371                 switch (O(mode,opt)) {
 372                 case O(GROW,'c'):
 373                 case O(GROW,ChunkSize):
 374                 case O(CREATE,'c'):
 375                 case O(CREATE,ChunkSize):
 376                 case O(BUILD,'c'): /* chunk or rounding */
 377                 case O(BUILD,ChunkSize): /* chunk or rounding */
 378                         if (s.chunk) {
 379                                 pr_err("chunk/rounding may only be specified once. "
 380                                         "Second value is %s.\n", optarg);
 381                                 exit(2);
 382                         }
 383                         s.chunk = parse_size(optarg);
 384                         if (s.chunk == INVALID_SECTORS ||
 385                             s.chunk < 8 || (s.chunk&1)) {
 386                                 pr_err("invalid chunk/rounding value: %s\n",
 387                                         optarg);
 388                                 exit(2);
 389                         }
 390                         /* Convert sectors to K */
 391                         s.chunk /= 2;
 392                         continue;
 393
 394                 case O(INCREMENTAL, 'e'):
 395                 case O(CREATE,'e'):
 396                 case O(ASSEMBLE,'e'):
 397                 case O(MISC,'e'): /* set metadata (superblock) information */
 398                         if (ss) {
 399                                 pr_err("metadata information already given\n");
 400                                 exit(2);
 401                         }
 402                         for(i=0; !ss && superlist[i]; i++)
 403                                 ss = superlist[i]->match_metadata_desc(optarg);
 404
 405                         if (!ss) {
 406                                 pr_err("unrecognised metadata identifier: %s\n", optarg);
 407                                 exit(2);
 408                         }
 409                         continue;
 410
 411                 case O(MANAGE,'W'):
 412                 case O(MANAGE,WriteMostly):
 413                 case O(BUILD,'W'):
 414                 case O(BUILD,WriteMostly):
 415                 case O(CREATE,'W'):
 416                 case O(CREATE,WriteMostly):
 417                         /* set write-mostly for following devices */
 418                         writemostly = 1;
 419                         continue;
 420
 421                 case O(MANAGE,'w'):
 422                         /* clear write-mostly for following devices */
 423                         writemostly = 2;
 424                         continue;
 425
 426
 427                 case O(GROW,'z'):
 428                 case O(CREATE,'z'):
 429                 case O(BUILD,'z'): /* size */
 430                         if (s.size > 0) {
 431                                 pr_err("size may only be specified once. "
 432                                         "Second value is %s.\n", optarg);
 433                                 exit(2);
 434                         }
 435                         if (strcmp(optarg, "max")==0)
 436                                 s.size = MAX_SIZE;
 437                         else {
 438                                 s.size = parse_size(optarg);
 439                                 if (s.size == INVALID_SECTORS ||
 440                                     s.size < 8) {
 441                                         pr_err("invalid size: %s\n",
 442                                                 optarg);
 443                                         exit(2);
 444                                 }
 445                                 /* convert sectors to K */
 446                                 s.size /= 2;
 447                         }
 448                         continue;
 449
 450                 case O(GROW,'Z'): /* array size */
 451                         if (array_size > 0) {
 452                                 pr_err("array-size may only be specified once. "
 453                                         "Second value is %s.\n", optarg);
 454                                 exit(2);
 455                         }
 456                         if (strcmp(optarg, "max") == 0)
 457                                 array_size = MAX_SIZE;
 458                         else {
 459                                 array_size = parse_size(optarg);
 460                                 if (array_size == 0 ||
 461                                     array_size == INVALID_SECTORS) {
 462                                         pr_err("invalid array size: %s\n",
 463                                                 optarg);
 464                                         exit(2);
 465                                 }
 466                         }
 467                         continue;
 468
 469                 case O(CREATE,DataOffset):
 470                 case O(GROW,DataOffset):
 471                         if (data_offset != INVALID_SECTORS) {
 472                                 pr_err("data-offset may only be specified one. "
 473                                         "Second value is %s.\n", optarg);
 474                                 exit(2);
 475                         }
 476                         if (mode == CREATE &&
 477                             strcmp(optarg, "variable") == 0)
 478                                 data_offset = VARIABLE_OFFSET;
 479                         else
 480                                 data_offset = parse_size(optarg);
 481                         if (data_offset == INVALID_SECTORS) {
 482                                 pr_err("invalid data-offset: %s\n",
 483                                         optarg);
 484                                 exit(2);
 485                         }
 486                         continue;
 487
 488                 case O(GROW,'l'):
 489                 case O(CREATE,'l'):
 490                 case O(BUILD,'l'): /* set raid level*/
 491                         if (s.level != UnSet) {
 492                                 pr_err("raid level may only be set once.  "
 493                                         "Second value is %s.\n", optarg);
 494                                 exit(2);
 495                         }
 496                         s.level = map_name(pers, optarg);
 497                         if (s.level == UnSet) {
 498                                 pr_err("invalid raid level: %s\n",
 499                                         optarg);
 500                                 exit(2);
 501                         }
 502                         if (s.level != 0 && s.level != LEVEL_LINEAR && s.level != 1 &&
 503                             s.level != LEVEL_MULTIPATH && s.level != LEVEL_FAULTY &&
 504                             s.level != 10 &&
 505                             mode == BUILD) {
 506                                 pr_err("Raid level %s not permitted with --build.\n",
 507                                         optarg);
 508                                 exit(2);
 509                         }
 510                         if (s.sparedisks > 0 && s.level < 1 && s.level >= -1) {
 511                                 pr_err("raid level %s is incompatible with spare-devices setting.\n",
 512                                         optarg);
 513                                 exit(2);
 514                         }
 515                         ident.level = s.level;
 516                         continue;
 517
 518                 case O(GROW, 'p'): /* new layout */
 519                 case O(GROW, Layout):
 520                         if (s.layout_str) {
 521                                 pr_err("layout may only be sent once.  "
 522                                        "Second value was %s\n", optarg);
 523                                 exit(2);
 524                         }
 525                         s.layout_str = optarg;
 526                         /* 'Grow' will parse the value */
 527                         continue;
 528
 529                 case O(CREATE,'p'): /* raid5 layout */
 530                 case O(CREATE,Layout):
 531                 case O(BUILD,'p'): /* faulty layout */
 532                 case O(BUILD,Layout):
 533                         if (s.layout != UnSet) {
 534                                 pr_err("layout may only be sent once.  "
 535                                        "Second value was %s\n", optarg);
 536                                 exit(2);
 537                         }
 538                         switch(s.level) {
 539                         default:
 540                                 pr_err("layout not meaningful for %s arrays.\n",
 541                                         map_num(pers, s.level));
 542                                 exit(2);
 543                         case UnSet:
 544                                 pr_err("raid level must be given before layout.\n");
 545                                 exit(2);
 546
 547                         case 5:
 548                                 s.layout = map_name(r5layout, optarg);
 549                                 if (s.layout==UnSet) {
 550                                         pr_err("layout %s not understood for raid5.\n",
 551                                                 optarg);
 552                                         exit(2);
 553                                 }
 554                                 break;
 555                         case 6:
 556                                 s.layout = map_name(r6layout, optarg);
 557                                 if (s.layout==UnSet) {
 558                                         pr_err("layout %s not understood for raid6.\n",
 559                                                 optarg);
 560                                         exit(2);
 561                                 }
 562                                 break;
 563
 564                         case 10:
 565                                 s.layout = parse_layout_10(optarg);
 566                                 if (s.layout < 0) {
 567                                         pr_err("layout for raid10 must be 'nNN', 'oNN' or 'fNN' where NN is a number, not %s\n", optarg);
 568                                         exit(2);
 569                                 }
 570                                 break;
 571                         case LEVEL_FAULTY:
 572                                 /* Faulty
 573                                  * modeNNN
 574                                  */
 575                                 s.layout = parse_layout_faulty(optarg);
 576                                 if (s.layout == -1) {
 577                                         pr_err("layout %s not understood for faulty.\n",
 578                                                 optarg);
 579                                         exit(2);
 580                                 }
 581                                 break;
 582                         }
 583                         continue;
 584
 585                 case O(CREATE,AssumeClean):
 586                 case O(BUILD,AssumeClean): /* assume clean */
 587                 case O(GROW,AssumeClean):
 588                         s.assume_clean = 1;
 589                         continue;
 590
 591                 case O(GROW,'n'):
 592                 case O(CREATE,'n'):
 593                 case O(BUILD,'n'): /* number of raid disks */
 594                         if (s.raiddisks) {
 595                                 pr_err("raid-devices set twice: %d and %s\n",
 596                                         s.raiddisks, optarg);
 597                                 exit(2);
 598                         }
 599                         s.raiddisks = parse_num(optarg);
 600                         if (s.raiddisks <= 0) {
 601                                 pr_err("invalid number of raid devices: %s\n",
 602                                         optarg);
 603                                 exit(2);
 604                         }
 605                         ident.raid_disks = s.raiddisks;
 606                         continue;
 607
 608                 case O(CREATE,'x'): /* number of spare (eXtra) disks */
 609                         if (s.sparedisks) {
 610                                 pr_err("spare-devices set twice: %d and %s\n",
 611                                        s.sparedisks, optarg);
 612                                 exit(2);
 613                         }
 614                         if (s.level != UnSet && s.level <= 0 && s.level >= -1) {
 615                                 pr_err("spare-devices setting is incompatible with raid level %d\n",
 616                                         s.level);
 617                                 exit(2);
 618                         }
 619                         s.sparedisks = parse_num(optarg);
 620                         if (s.sparedisks < 0) {
 621                                 pr_err("invalid number of spare-devices: %s\n",
 622                                         optarg);
 623                                 exit(2);
 624                         }
 625                         continue;
 626
 627                 case O(CREATE,'a'):
 628                 case O(CREATE,Auto):
 629                 case O(BUILD,'a'):
 630                 case O(BUILD,Auto):
 631                 case O(INCREMENTAL,'a'):
 632                 case O(INCREMENTAL,Auto):
 633                 case O(ASSEMBLE,'a'):
 634                 case O(ASSEMBLE,Auto): /* auto-creation of device node */
 635                         c.autof = parse_auto(optarg, "--auto flag", 0);
 636                         continue;
 637
 638                 case O(CREATE,Symlinks):
 639                 case O(BUILD,Symlinks):
 640                 case O(ASSEMBLE,Symlinks): /* auto creation of symlinks in /dev to /dev/md */
 641                         symlinks = optarg;
 642                         continue;
 643
 644                 case O(BUILD,'f'): /* force honouring '-n 1' */
 645                 case O(BUILD,Force): /* force honouring '-n 1' */
 646                 case O(GROW,'f'): /* ditto */
 647                 case O(GROW,Force): /* ditto */
 648                 case O(CREATE,'f'): /* force honouring of device list */
 649                 case O(CREATE,Force): /* force honouring of device list */
 650                 case O(ASSEMBLE,'f'): /* force assembly */
 651                 case O(ASSEMBLE,Force): /* force assembly */
 652                 case O(MISC,'f'): /* force zero */
 653                 case O(MISC,Force): /* force zero */
 654                 case O(MANAGE,Force): /* add device which is too large */
 655                         c.force=1;
 656                         continue;
 657                         /* now for the Assemble options */
 658                 case O(ASSEMBLE, FreezeReshape):   /* Freeze reshape during
 659                                                     * initrd phase */
 660                 case O(INCREMENTAL, FreezeReshape):
 661                         c.freeze_reshape = 1;
 662                         continue;
 663                 case O(CREATE,'u'): /* uuid of array */
 664                 case O(ASSEMBLE,'u'): /* uuid of array */
 665                         if (ident.uuid_set) {
 666                                 pr_err("uuid cannot be set twice.  "
 667                                         "Second value %s.\n", optarg);
 668                                 exit(2);
 669                         }
 670                         if (parse_uuid(optarg, ident.uuid))
 671                                 ident.uuid_set = 1;
 672                         else {
 673                                 pr_err("Bad uuid: %s\n", optarg);
 674                                 exit(2);
 675                         }
 676                         continue;
 677
 678                 case O(CREATE,'N'):
 679                 case O(ASSEMBLE,'N'):
 680                 case O(MISC,'N'):
 681                         if (ident.name[0]) {
 682                                 pr_err("name cannot be set twice.   "
 683                                         "Second value %s.\n", optarg);
 684                                 exit(2);
 685                         }
 686                         if (mode == MISC && !c.subarray) {
 687                                 pr_err("-N/--name only valid with --update-subarray in misc mode\n");
 688                                 exit(2);
 689                         }
 690                         if (strlen(optarg) > 32) {
 691                                 pr_err("name '%s' is too long, 32 chars max.\n",
 692                                         optarg);
 693                                 exit(2);
 694                         }
 695                         strcpy(ident.name, optarg);
 696                         continue;
 697
 698                 case O(ASSEMBLE,'m'): /* super-minor for array */
 699                 case O(ASSEMBLE,SuperMinor):
 700                         if (ident.super_minor != UnSet) {
 701                                 pr_err("super-minor cannot be set twice.  "
 702                                         "Second value: %s.\n", optarg);
 703                                 exit(2);
 704                         }
 705                         if (strcmp(optarg, "dev")==0)
 706                                 ident.super_minor = -2;
 707                         else {
 708                                 ident.super_minor = parse_num(optarg);
 709                                 if (ident.super_minor < 0) {
 710                                         pr_err("Bad super-minor number: %s.\n", optarg);
 711                                         exit(2);
 712                                 }
 713                         }
 714                         continue;
 715
 716                 case O(ASSEMBLE,'o'):
 717                 case O(MANAGE,'o'):
 718                 case O(CREATE,'o'):
 719                         c.readonly = 1;
 720                         continue;
 721
 722                 case O(ASSEMBLE,'U'): /* update the superblock */
 723                 case O(MISC,'U'):
 724                         if (c.update) {
 725                                 pr_err("Can only update one aspect"
 726                                         " of superblock, both %s and %s given.\n",
 727                                         c.update, optarg);
 728                                 exit(2);
 729                         }
 730                         if (mode == MISC && !c.subarray) {
 731                                 pr_err("Only subarrays can be"
 732                                         " updated in misc mode\n");
 733                                 exit(2);
 734                         }
 735                         c.update = optarg;
 736                         if (strcmp(c.update, "sparc2.2")==0)
 737                                 continue;
 738                         if (strcmp(c.update, "super-minor") == 0)
 739                                 continue;
 740                         if (strcmp(c.update, "summaries")==0)
 741                                 continue;
 742                         if (strcmp(c.update, "resync")==0)
 743                                 continue;
 744                         if (strcmp(c.update, "uuid")==0)
 745                                 continue;
 746                         if (strcmp(c.update, "name")==0)
 747                                 continue;
 748                         if (strcmp(c.update, "homehost")==0)
 749                                 continue;
 750                         if (strcmp(c.update, "devicesize")==0)
 751                                 continue;
 752                         if (strcmp(c.update, "no-bitmap")==0)
 753                                 continue;
 754                         if (strcmp(c.update, "bbl") == 0)
 755                                 continue;
 756                         if (strcmp(c.update, "no-bbl") == 0)
 757                                 continue;
 758                         if (strcmp(c.update, "metadata") == 0)
 759                                 continue;
 760                         if (strcmp(c.update, "byteorder")==0) {
 761                                 if (ss) {
 762                                         pr_err("must not set metadata"
 763                                                " type with --update=byteorder.\n");
 764                                         exit(2);
 765                                 }
 766                                 for(i=0; !ss && superlist[i]; i++)
 767                                         ss = superlist[i]->match_metadata_desc(
 768                                                 "0.swap");
 769                                 if (!ss) {
 770                                         pr_err("INTERNAL ERROR"
 771                                                 " cannot find 0.swap\n");
 772                                         exit(2);
 773                                 }
 774
 775                                 continue;
 776                         }
 777                         if (strcmp(c.update,"?") == 0 ||
 778                             strcmp(c.update, "help") == 0) {
 779                                 outf = stdout;
 780                                 fprintf(outf, Name ": ");
 781                         } else {
 782                                 outf = stderr;
 783                                 fprintf(outf,
 784                                         Name ": '--update=%s' is invalid.  ",
 785                                         c.update);
 786                         }
 787                         fprintf(outf, "Valid --update options are:\n"
 788                 "     'sparc2.2', 'super-minor', 'uuid', 'name', 'resync',\n"
 789                 "     'summaries', 'homehost', 'byteorder', 'devicesize',\n"
 790                 "     'no-bitmap', 'metadata'\n");
 791                         exit(outf == stdout ? 0 : 2);
 792
 793                 case O(MANAGE,'U'):
 794                         /* update=devicesize is allowed with --re-add */
 795                         if (devmode != 'A') {
 796                                 pr_err("--update in Manage mode only"
 797                                         " allowed with --re-add.\n");
 798                                 exit(1);
 799                         }
 800                         if (c.update) {
 801                                 pr_err("Can only update one aspect"
 802                                         " of superblock, both %s and %s given.\n",
 803                                         c.update, optarg);
 804                                 exit(2);
 805                         }
 806                         c.update = optarg;
 807                         if (strcmp(c.update, "devicesize") != 0 &&
 808                             strcmp(c.update, "bbl") != 0 &&
 809                             strcmp(c.update, "no-bbl") != 0) {
 810                                 pr_err("only 'devicesize', 'bbl' and 'no-bbl' can be"
 811                                         " updated with --re-add\n");
 812                                 exit(2);
 813                         }
 814                         continue;
 815
 816                 case O(INCREMENTAL,NoDegraded):
 817                         pr_err("--no-degraded is deprecated in Incremental mode\n");
 818                 case O(ASSEMBLE,NoDegraded): /* --no-degraded */
 819                         c.runstop = -1; /* --stop isn't allowed for --assemble,
 820                                          * so we overload slightly */
 821                         continue;
 822
 823                 case O(ASSEMBLE,'c'):
 824                 case O(ASSEMBLE,ConfigFile):
 825                 case O(INCREMENTAL, 'c'):
 826                 case O(INCREMENTAL, ConfigFile):
 827                 case O(MISC, 'c'):
 828                 case O(MISC, ConfigFile):
 829                 case O(MONITOR,'c'):
 830                 case O(MONITOR,ConfigFile):
 831                         if (configfile) {
 832                                 pr_err("configfile cannot be set twice.  "
 833                                         "Second value is %s.\n", optarg);
 834                                 exit(2);
 835                         }
 836                         configfile = optarg;
 837                         set_conffile(configfile);
 838                         /* FIXME possibly check that config file exists.  Even parse it */
 839                         continue;
 840                 case O(ASSEMBLE,'s'): /* scan */
 841                 case O(MISC,'s'):
 842                 case O(MONITOR,'s'):
 843                 case O(INCREMENTAL,'s'):
 844                         c.scan = 1;
 845                         continue;
 846
 847                 case O(MONITOR,'m'): /* mail address */
 848                 case O(MONITOR,EMail):
 849                         if (mailaddr)
 850                                 pr_err("only specify one mailaddress. %s ignored.\n",
 851                                         optarg);
 852                         else
 853                                 mailaddr = optarg;
 854                         continue;
 855
 856                 case O(MONITOR,'p'): /* alert program */
 857                 case O(MONITOR,ProgramOpt): /* alert program */
 858                         if (program)
 859                                 pr_err("only specify one alter program. %s ignored.\n",
 860                                         optarg);
 861                         else
 862                                 program = optarg;
 863                         continue;
 864
 865                 case O(MONITOR,'r'): /* rebuild increments */
 866                 case O(MONITOR,Increment):
 867                         increments = atoi(optarg);
 868                         if (increments > 99 || increments < 1) {
 869                                 pr_err("please specify positive integer between 1 and 99 as rebuild increments.\n");
 870                                 exit(2);
 871                         }
 872                         continue;
 873
 874                 case O(MONITOR,'d'): /* delay in seconds */
 875                 case O(GROW, 'd'):
 876                 case O(BUILD,'d'): /* delay for bitmap updates */
 877                 case O(CREATE,'d'):
 878                         if (c.delay)
 879                                 pr_err("only specify delay once. %s ignored.\n",
 880                                         optarg);
 881                         else {
 882                                 c.delay = parse_num(optarg);
 883                                 if (c.delay < 1) {
 884                                         pr_err("invalid delay: %s\n",
 885                                                 optarg);
 886                                         exit(2);
 887                                 }
 888                         }
 889                         continue;
 890                 case O(MONITOR,'f'): /* daemonise */
 891                 case O(MONITOR,Fork):
 892                         daemonise = 1;
 893                         continue;
 894                 case O(MONITOR,'i'): /* pid */
 895                         if (pidfile)
 896                                 pr_err("only specify one pid file. %s ignored.\n",
 897                                         optarg);
 898                         else
 899                                 pidfile = optarg;
 900                         continue;
 901                 case O(MONITOR,'1'): /* oneshot */
 902                         oneshot = 1;
 903                         spare_sharing = 0;
 904                         continue;
 905                 case O(MONITOR,'t'): /* test */
 906                         c.test = 1;
 907                         continue;
 908                 case O(MONITOR,'y'): /* log messages to syslog */
 909                         openlog("mdadm", LOG_PID, SYSLOG_FACILITY);
 910                         dosyslog = 1;
 911                         continue;
 912                 case O(MONITOR, NoSharing):
 913                         spare_sharing = 0;
 914                         continue;
 915
 916                         /* now the general management options.  Some are applicable
 917                          * to other modes. None have arguments.
 918                          */
 919                 case O(GROW,'a'):
 920                 case O(GROW,Add):
 921                 case O(MANAGE,'a'):
 922                 case O(MANAGE,Add): /* add a drive */
 923                         devmode = 'a';
 924                         continue;
 925                 case O(MANAGE,ReAdd):
 926                         devmode = 'A';
 927                         continue;
 928                 case O(MANAGE,'r'): /* remove a drive */
 929                 case O(MANAGE,Remove):
 930                         devmode = 'r';
 931                         continue;
 932                 case O(MANAGE,'f'): /* set faulty */
 933                 case O(MANAGE,Fail):
 934                 case O(INCREMENTAL,'f'):
 935                 case O(INCREMENTAL,Remove):
 936                 case O(INCREMENTAL,Fail): /* r for incremental is taken, use f
 937                                            * even though we will both fail and
 938                                            * remove the device */
 939                         devmode = 'f';
 940                         continue;
 941                 case O(MANAGE,Replace):
 942                         /* Mark these devices for replacement */
 943                         devmode = 'R';
 944                         continue;
 945                 case O(MANAGE,With):
 946                         /* These are the replacements to use */
 947                         if (devmode != 'R') {
 948                                 pr_err("--with must follow --replace\n");
 949                                 exit(2);
 950                         }
 951                         devmode = 'W';
 952                         continue;
 953                 case O(INCREMENTAL,'R'):
 954                 case O(MANAGE,'R'):
 955                 case O(ASSEMBLE,'R'):
 956                 case O(BUILD,'R'):
 957                 case O(CREATE,'R'): /* Run the array */
 958                         if (c.runstop < 0) {
 959                                 pr_err("Cannot both Stop and Run an array\n");
 960                                 exit(2);
 961                         }
 962                         c.runstop = 1;
 963                         continue;
 964                 case O(MANAGE,'S'):
 965                         if (c.runstop > 0) {
 966                                 pr_err("Cannot both Run and Stop an array\n");
 967                                 exit(2);
 968                         }
 969                         c.runstop = -1;
 970                         continue;
 971                 case O(MANAGE,'t'):
 972                         c.test = 1;
 973                         continue;
 974
 975                 case O(MISC,'Q'):
 976                 case O(MISC,'D'):
 977                 case O(MISC,'E'):
 978                 case O(MISC,KillOpt):
 979                 case O(MISC,'R'):
 980                 case O(MISC,'S'):
 981                 case O(MISC,'X'):
 982                 case O(MISC, ExamineBB):
 983                 case O(MISC,'o'):
 984                 case O(MISC,'w'):
 985                 case O(MISC,'W'):
 986                 case O(MISC, WaitOpt):
 987                 case O(MISC, Waitclean):
 988                 case O(MISC, DetailPlatform):
 989                 case O(MISC, KillSubarray):
 990                 case O(MISC, UpdateSubarray):
 991                 case O(MISC, Dump):
 992                 case O(MISC, Restore):
 993                         if (opt == KillSubarray || opt == UpdateSubarray) {
 994                                 if (c.subarray) {
 995                                         pr_err("subarray can only"
 996                                                 " be specified once\n");
 997                                         exit(2);
 998                                 }
 999                                 c.subarray = optarg;
1000                         }
1001                         if (devmode && devmode != opt &&
1002                             (devmode == 'E' || (opt == 'E' && devmode != 'Q'))) {
1003                                 pr_err("--examine/-E cannot be given with ");
1004                                 if (devmode == 'E') {
1005                                         if (option_index >= 0)
1006                                                 fprintf(stderr, "--%s\n",
1007                                                         long_options[option_index].name);
1008                                         else
1009                                                 fprintf(stderr, "-%c\n", opt);
1010                                 } else if (isalpha(devmode))
1011                                         fprintf(stderr, "-%c\n", devmode);
1012                                 else
1013                                         fprintf(stderr, "previous option\n");
1014                                 exit(2);
1015                         }
1016                         devmode = opt;
1017                         if (opt == Dump || opt == Restore) {
1018                                 if (dump_directory != NULL) {
1019                                         pr_err("dump/restore directory specified twice: %s and %s\n",
1020                                                dump_directory, optarg);
1021                                         exit(2);
1022                                 }
1023                                 dump_directory = optarg;
1024                         }
1025                         continue;
1026                 case O(MISC, UdevRules):
1027                         if (devmode && devmode != opt) {
1028                                 pr_err("--udev-rules must"
1029                                        " be the only option.\n");
1030                         } else {
1031                                 if (udev_filename)
1032                                         pr_err("only specify one udev "
1033                                                 "rule filename. %s ignored.\n",
1034                                                 optarg);
1035                                 else
1036                                         udev_filename = optarg;
1037                         }
1038                         devmode = opt;
1039                         continue;
1040                 case O(MISC,'t'):
1041                         c.test = 1;
1042                         continue;
1043
1044                 case O(MISC, Sparc22):
1045                         if (devmode != 'E') {
1046                                 pr_err("--sparc2.2 only allowed with --examine\n");
1047                                 exit(2);
1048                         }
1049                         c.SparcAdjust = 1;
1050                         continue;
1051
1052                 case O(ASSEMBLE,'b'): /* here we simply set the bitmap file */
1053                 case O(ASSEMBLE,Bitmap):
1054                         if (!optarg) {
1055                                 pr_err("bitmap file needed with -b in --assemble mode\n");
1056                                 exit(2);
1057                         }
1058                         if (strcmp(optarg, "internal")==0) {
1059                                 pr_err("there is no need to specify --bitmap when assembling arrays with internal bitmaps\n");
1060                                 continue;
1061                         }
1062                         bitmap_fd = open(optarg, O_RDWR);
1063                         if (!*optarg || bitmap_fd < 0) {
1064                                 pr_err("cannot open bitmap file %s: %s\n", optarg, strerror(errno));
1065                                 exit(2);
1066                         }
1067                         ident.bitmap_fd = bitmap_fd; /* for Assemble */
1068                         continue;
1069
1070                 case O(ASSEMBLE, BackupFile):
1071                 case O(GROW, BackupFile):
1072                         /* Specify a file into which grow might place a backup,
1073                          * or from which assemble might recover a backup
1074                          */
1075                         if (c.backup_file) {
1076                                 pr_err("backup file already specified, rejecting %s\n", optarg);
1077                                 exit(2);
1078                         }
1079                         c.backup_file = optarg;
1080                         continue;
1081
1082                 case O(GROW, Continue):
1083                         /* Continue interrupted grow
1084                          */
1085                         grow_continue = 1;
1086                         continue;
1087                 case O(ASSEMBLE, InvalidBackup):
1088                         /* Acknowledge that the backupfile is invalid, but ask
1089                          * to continue anyway
1090                          */
1091                         c.invalid_backup = 1;
1092                         continue;
1093
1094                 case O(BUILD,'b'):
1095                 case O(BUILD,Bitmap):
1096                 case O(CREATE,'b'):
1097                 case O(CREATE,Bitmap): /* here we create the bitmap */
1098                 case O(GROW,'b'):
1099                 case O(GROW,Bitmap):
1100                         if (strcmp(optarg, "internal")== 0 ||
1101                             strcmp(optarg, "none")== 0 ||
1102                             strchr(optarg, '/') != NULL) {
1103                                 s.bitmap_file = optarg;
1104                                 continue;
1105                         }
1106                         /* probable typo */
1107                         pr_err("bitmap file must contain a '/', or be 'internal', or 'none'\n"
1108                                 "       not '%s'\n", optarg);
1109                         exit(2);
1110
1111                 case O(GROW,BitmapChunk):
1112                 case O(BUILD,BitmapChunk):
1113                 case O(CREATE,BitmapChunk): /* bitmap chunksize */
1114                         s.bitmap_chunk = parse_size(optarg);
1115                         if (s.bitmap_chunk == 0 ||
1116                             s.bitmap_chunk == INVALID_SECTORS ||
1117                             s.bitmap_chunk & (s.bitmap_chunk - 1)) {
1118                                 pr_err("invalid bitmap chunksize: %s\n",
1119                                        optarg);
1120                                 exit(2);
1121                         }
1122                         s.bitmap_chunk = s.bitmap_chunk * 512;
1123                         continue;
1124
1125                 case O(GROW, WriteBehind):
1126                 case O(BUILD, WriteBehind):
1127                 case O(CREATE, WriteBehind): /* write-behind mode */
1128                         s.write_behind = DEFAULT_MAX_WRITE_BEHIND;
1129                         if (optarg) {
1130                                 s.write_behind = parse_num(optarg);
1131                                 if (s.write_behind < 0 ||
1132                                     s.write_behind > 16383) {
1133                                         pr_err("Invalid value for maximum outstanding write-behind writes: %s.\n\tMust be between 0 and 16383.\n", optarg);
1134                                         exit(2);
1135                                 }
1136                         }
1137                         continue;
1138
1139                 case O(INCREMENTAL, 'r'):
1140                 case O(INCREMENTAL, RebuildMapOpt):
1141                         rebuild_map = 1;
1142                         continue;
1143                 case O(INCREMENTAL, IncrementalPath):
1144                         remove_path = optarg;
1145                         continue;
1146                 }
1147                 /* We have now processed all the valid options. Anything else is
1148                  * an error
1149                  */
1150                 if (option_index > 0)
1151                         pr_err(":option --%s not valid in %s mode\n",
1152                                 long_options[option_index].name,
1153                                 map_num(modes, mode));
1154                 else
1155                         pr_err("option -%c not valid in %s mode\n",
1156                                 opt, map_num(modes, mode));
1157                 exit(2);
1158
1159         }
1160
1161         if (print_help) {
1162                 char *help_text;
1163                 if (print_help == 2)
1164                         help_text = OptionHelp;
1165                 else
1166                         help_text = mode_help[mode];
1167                 if (help_text == NULL)
1168                         help_text = Help;
1169                 fputs(help_text,stdout);
1170                 exit(0);
1171         }
1172
1173         if (!mode && devs_found) {
1174                 mode = MISC;
1175                 devmode = 'Q';
1176                 if (devlist->disposition == 0)
1177                         devlist->disposition = devmode;
1178         }
1179         if (!mode) {
1180                 fputs(Usage, stderr);
1181                 exit(2);
1182         }
1183
1184         if (symlinks) {
1185                 struct createinfo *ci = conf_get_create_info();
1186
1187                 if (strcasecmp(symlinks, "yes") == 0)
1188                         ci->symlinks = 1;
1189                 else if (strcasecmp(symlinks, "no") == 0)
1190                         ci->symlinks = 0;
1191                 else {
1192                         pr_err("option --symlinks must be 'no' or 'yes'\n");
1193                         exit(2);
1194                 }
1195         }
1196         /* Ok, got the option parsing out of the way
1197          * hopefully it's mostly right but there might be some stuff
1198          * missing
1199          *
1200          * That is mosty checked in the per-mode stuff but...
1201          *
1202          * For @,B,C and A without -s, the first device listed must be
1203          * an md device.  We check that here and open it.
1204          */
1205
1206         if (mode == MANAGE || mode == BUILD || mode == CREATE
1207             || mode == GROW
1208             || (mode == ASSEMBLE && ! c.scan)) {
1209                 if (devs_found < 1) {
1210                         pr_err("an md device must be given in this mode\n");
1211                         exit(2);
1212                 }
1213                 if ((int)ident.super_minor == -2 && c.autof) {
1214                         pr_err("--super-minor=dev is incompatible with --auto\n");
1215                         exit(2);
1216                 }
1217                 if (mode == MANAGE || mode == GROW) {
1218                         mdfd = open_mddev(devlist->devname, 1);
1219                         if (mdfd < 0)
1220                                 exit(1);
1221                 } else
1222                         /* non-existent device is OK */
1223                         mdfd = open_mddev(devlist->devname, 0);
1224                 if (mdfd == -2) {
1225                         pr_err("device %s exists but is not an "
1226                                 "md array.\n", devlist->devname);
1227                         exit(1);
1228                 }
1229                 if ((int)ident.super_minor == -2) {
1230                         struct stat stb;
1231                         if (mdfd < 0) {
1232                                 pr_err("--super-minor=dev given, and "
1233                                         "listed device %s doesn't exist.\n",
1234                                         devlist->devname);
1235                                 exit(1);
1236                         }
1237                         fstat(mdfd, &stb);
1238                         ident.super_minor = minor(stb.st_rdev);
1239                 }
1240                 if (mdfd >= 0 && mode != MANAGE && mode != GROW) {
1241                         /* We don't really want this open yet, we just might
1242                          * have wanted to check some things
1243                          */
1244                         close(mdfd);
1245                         mdfd = -1;
1246                 }
1247         }
1248
1249         if (s.raiddisks) {
1250                 if (s.raiddisks == 1 &&  !c.force && s.level != LEVEL_FAULTY) {
1251                         pr_err("'1' is an unusual number of drives for an array, so it is probably\n"
1252                                 "     a mistake.  If you really mean it you will need to specify --force before\n"
1253                                 "     setting the number of drives.\n");
1254                         exit(2);
1255                 }
1256         }
1257
1258         if (c.homehost == NULL)
1259                 c.homehost = conf_get_homehost(&c.require_homehost);
1260         if (c.homehost == NULL || strcasecmp(c.homehost, "<system>")==0) {
1261                 if (gethostname(sys_hostname, sizeof(sys_hostname)) == 0) {
1262                         sys_hostname[sizeof(sys_hostname)-1] = 0;
1263                         c.homehost = sys_hostname;
1264                 }
1265         }
1266         if (c.homehost && (!c.homehost[0] || strcasecmp(c.homehost, "<none>") == 0)) {
1267                 c.homehost = NULL;
1268                 c.require_homehost = 0;
1269         }
1270
1271         if (c.backup_file && data_offset != INVALID_SECTORS) {
1272                 pr_err("--backup-file and --data-offset are incompatible\n");
1273                 exit(2);
1274         }
1275
1276         if ((mode == MISC && devmode == 'E')
1277             || (mode == MONITOR && spare_sharing == 0))
1278                 /* Anyone may try this */;
1279         else if (geteuid() != 0) {
1280                 pr_err("must be super-user to perform this action\n");
1281                 exit(1);
1282         }
1283
1284         ident.autof = c.autof;
1285
1286         if (c.scan && c.verbose < 2)
1287                 /* --scan implied --brief unless -vv */
1288                 c.brief = 1;
1289
1290         rv = 0;
1291         switch(mode) {
1292         case MANAGE:
1293                 /* readonly, add/remove, readwrite, runstop */
1294                 if (c.readonly > 0)
1295                         rv = Manage_ro(devlist->devname, mdfd, c.readonly);
1296                 if (!rv && devs_found>1)
1297                         rv = Manage_subdevs(devlist->devname, mdfd,
1298                                             devlist->next, c.verbose, c.test,
1299                                             c.update, c.force);
1300                 if (!rv && c.readonly < 0)
1301                         rv = Manage_ro(devlist->devname, mdfd, c.readonly);
1302                 if (!rv && c.runstop)
1303                         rv = Manage_runstop(devlist->devname, mdfd, c.runstop, c.verbose, 0);
1304                 break;
1305         case ASSEMBLE:
1306                 if (devs_found == 1 && ident.uuid_set == 0 &&
1307                     ident.super_minor == UnSet && ident.name[0] == 0 && !c.scan ) {
1308                         /* Only a device has been given, so get details from config file */
1309                         struct mddev_ident *array_ident = conf_get_ident(devlist->devname);
1310                         if (array_ident == NULL) {
1311                                 pr_err("%s not identified in config file.\n",
1312                                         devlist->devname);
1313                                 rv |= 1;
1314                                 if (mdfd >= 0)
1315                                         close(mdfd);
1316                         } else {
1317                                 if (array_ident->autof == 0)
1318                                         array_ident->autof = c.autof;
1319                                 rv |= Assemble(ss, devlist->devname, array_ident,
1320                                                NULL, &c);
1321                         }
1322                 } else if (!c.scan)
1323                         rv = Assemble(ss, devlist->devname, &ident,
1324                                       devlist->next, &c);
1325                 else if (devs_found > 0) {
1326                         if (c.update && devs_found > 1) {
1327                                 pr_err("can only update a single array at a time\n");
1328                                 exit(1);
1329                         }
1330                         if (c.backup_file && devs_found > 1) {
1331                                 pr_err("can only assemble a single array when providing a backup file.\n");
1332                                 exit(1);
1333                         }
1334                         for (dv = devlist ; dv ; dv=dv->next) {
1335                                 struct mddev_ident *array_ident = conf_get_ident(dv->devname);
1336                                 if (array_ident == NULL) {
1337                                         pr_err("%s not identified in config file.\n",
1338                                                 dv->devname);
1339                                         rv |= 1;
1340                                         continue;
1341                                 }
1342                                 if (array_ident->autof == 0)
1343                                         array_ident->autof = c.autof;
1344                                 rv |= Assemble(ss, dv->devname, array_ident,
1345                                                NULL, &c);
1346                         }
1347                 } else {
1348                         if (c.update) {
1349                                 pr_err("--update not meaningful with a --scan assembly.\n");
1350                                 exit(1);
1351                         }
1352                         if (c.backup_file) {
1353                                 pr_err("--backup_file not meaningful with a --scan assembly.\n");
1354                                 exit(1);
1355                         }
1356                         rv = scan_assemble(ss, &c, &ident);
1357                 }
1358
1359                 break;
1360         case BUILD:
1361                 if (c.delay == 0)
1362                         c.delay = DEFAULT_BITMAP_DELAY;
1363                 if (s.write_behind && !s.bitmap_file) {
1364                         pr_err("write-behind mode requires a bitmap.\n");
1365                         rv = 1;
1366                         break;
1367                 }
1368                 if (s.raiddisks == 0) {
1369                         pr_err("no raid-devices specified.\n");
1370                         rv = 1;
1371                         break;
1372                 }
1373
1374                 if (s.bitmap_file) {
1375                         if (strcmp(s.bitmap_file, "internal")==0) {
1376                                 pr_err("'internal' bitmaps not supported with --build\n");
1377                                 rv |= 1;
1378                                 break;
1379                         }
1380                 }
1381                 rv = Build(devlist->devname, devlist->next, &s, &c);
1382                 break;
1383         case CREATE:
1384                 if (c.delay == 0)
1385                         c.delay = DEFAULT_BITMAP_DELAY;
1386                 if (s.write_behind && !s.bitmap_file) {
1387                         pr_err("write-behind mode requires a bitmap.\n");
1388                         rv = 1;
1389                         break;
1390                 }
1391                 if (s.raiddisks == 0) {
1392                         pr_err("no raid-devices specified.\n");
1393                         rv = 1;
1394                         break;
1395                 }
1396
1397                 rv = Create(ss, devlist->devname,
1398                             ident.name, ident.uuid_set ? ident.uuid : NULL,
1399                             devs_found-1, devlist->next,
1400                             &s, &c, data_offset);
1401                 break;
1402         case MISC:
1403                 if (devmode == 'E') {
1404                         if (devlist == NULL && !c.scan) {
1405                                 pr_err("No devices to examine\n");
1406                                 exit(2);
1407                         }
1408                         if (devlist == NULL)
1409                                 devlist = conf_get_devs();
1410                         if (devlist == NULL) {
1411                                 pr_err("No devices listed in %s\n", configfile?configfile:DefaultConfFile);
1412                                 exit(1);
1413                         }
1414                         rv = Examine(devlist, &c, ss);
1415                 } else if (devmode == DetailPlatform) {
1416                         rv = Detail_Platform(ss ? ss->ss : NULL, ss ? c.scan : 1,
1417                                              c.verbose, c.export,
1418                                              devlist ? devlist->devname : NULL);
1419                 } else if (devlist == NULL) {
1420                         if (devmode == 'S' && c.scan)
1421                                 rv = stop_scan(c.verbose);
1422                         else if ((devmode == 'D' || devmode == Waitclean) && c.scan)
1423                                 rv = misc_scan(devmode, &c);
1424                         else if (devmode == UdevRules)
1425                                 rv = Write_rules(udev_filename);
1426                         else {
1427                                 pr_err("No devices given.\n");
1428                                 exit(2);
1429                         }
1430                 } else
1431                         rv = misc_list(devlist, &ident, dump_directory, ss, &c);
1432                 break;
1433         case MONITOR:
1434                 if (!devlist && !c.scan) {
1435                         pr_err("Cannot monitor: need --scan or at least one device\n");
1436                         rv = 1;
1437                         break;
1438                 }
1439                 if (pidfile && !daemonise) {
1440                         pr_err("Cannot write a pid file when not in daemon mode\n");
1441                         rv = 1;
1442                         break;
1443                 }
1444                 if (c.delay == 0) {
1445                         if (get_linux_version() > 2006016)
1446                                 /* mdstat responds to poll */
1447                                 c.delay = 1000;
1448                         else
1449                                 c.delay = 60;
1450                 }
1451                 if (c.delay == 0)
1452                         c.delay = 60;
1453                 rv= Monitor(devlist, mailaddr, program,
1454                             &c, daemonise, oneshot,
1455                             dosyslog, pidfile, increments,
1456                             spare_sharing);
1457                 break;
1458
1459         case GROW:
1460                 if (array_size > 0) {
1461                         /* alway impose array size first, independent of
1462                          * anything else
1463                          * Do not allow level or raid_disks changes at the
1464                          * same time as that can be irreversibly destructive.
1465                          */
1466                         struct mdinfo sra;
1467                         int err;
1468                         if (s.raiddisks || s.level != UnSet) {
1469                                 pr_err("cannot change array size in same operation "
1470                                         "as changing raiddisks or level.\n"
1471                                         "    Change size first, then check that data is still intact.\n");
1472                                 rv = 1;
1473                                 break;
1474                         }
1475                         sysfs_init(&sra, mdfd, NULL);
1476                         if (array_size == MAX_SIZE)
1477                                 err = sysfs_set_str(&sra, NULL, "array_size", "default");
1478                         else
1479                                 err = sysfs_set_num(&sra, NULL, "array_size", array_size / 2);
1480                         if (err < 0) {
1481                                 if (errno == E2BIG)
1482                                         pr_err("--array-size setting"
1483                                                 " is too large.\n");
1484                                 else
1485                                         pr_err("current kernel does"
1486                                                 " not support setting --array-size\n");
1487                                 rv = 1;
1488                                 break;
1489                         }
1490                 }
1491                 if (devs_found > 1 && s.raiddisks == 0) {
1492                         /* must be '-a'. */
1493                         if (s.size > 0 || s.chunk || s.layout_str != NULL || s.bitmap_file) {
1494                                 pr_err("--add cannot be used with "
1495                                         "other geometry changes in --grow mode\n");
1496                                 rv = 1;
1497                                 break;
1498                         }
1499                         for (dv=devlist->next; dv ; dv=dv->next) {
1500                                 rv = Grow_Add_device(devlist->devname, mdfd,
1501                                                      dv->devname);
1502                                 if (rv)
1503                                         break;
1504                         }
1505                 } else if (s.bitmap_file) {
1506                         if (s.size > 0 || s.raiddisks || s.chunk ||
1507                             s.layout_str != NULL || devs_found > 1) {
1508                                 pr_err("--bitmap changes cannot be "
1509                                         "used with other geometry changes "
1510                                         "in --grow mode\n");
1511                                 rv = 1;
1512                                 break;
1513                         }
1514                         if (c.delay == 0)
1515                                 c.delay = DEFAULT_BITMAP_DELAY;
1516                         rv = Grow_addbitmap(devlist->devname, mdfd, &c, &s);
1517                 } else if (grow_continue)
1518                         rv = Grow_continue_command(devlist->devname,
1519                                                    mdfd, c.backup_file,
1520                                                    c.verbose);
1521                 else if (s.size > 0 || s.raiddisks || s.layout_str != NULL
1522                          || s.chunk != 0 || s.level != UnSet
1523                          || data_offset != INVALID_SECTORS) {
1524                         rv = Grow_reshape(devlist->devname, mdfd,
1525                                           devlist->next,
1526                                           data_offset, &c, &s);
1527                 } else if (array_size == 0)
1528                         pr_err("no changes to --grow\n");
1529                 break;
1530         case INCREMENTAL:
1531                 if (rebuild_map) {
1532                         RebuildMap();
1533                 }
1534                 if (c.scan) {
1535                         if (c.runstop <= 0) {
1536                                 pr_err("--incremental --scan meaningless without --run.\n");
1537                                 break;
1538                         }
1539                         if (devmode == 'f') {
1540                                 pr_err("--incremental --scan --fail not supported.\n");
1541                                 break;
1542                         }
1543                         rv = IncrementalScan(c.verbose);
1544                 }
1545                 if (!devlist) {
1546                         if (!rebuild_map && !c.scan) {
1547                                 pr_err("--incremental requires a device.\n");
1548                                 rv = 1;
1549                         }
1550                         break;
1551                 }
1552                 if (devlist->next) {
1553                         pr_err("--incremental can only handle one device.\n");
1554                         rv = 1;
1555                         break;
1556                 }
1557                 if (devmode == 'f')
1558                         rv = IncrementalRemove(devlist->devname, remove_path,
1559                                                c.verbose);
1560                 else
1561                         rv = Incremental(devlist->devname, &c, ss);
1562                 break;
1563         case AUTODETECT:
1564                 autodetect();
1565                 break;
1566         }
1567         exit(rv);
1568 }
1569
1570 static int scan_assemble(struct supertype *ss,
1571                          struct context *c,
1572                          struct mddev_ident *ident)
1573 {
1574         struct mddev_ident *a, *array_list =  conf_get_ident(NULL);
1575         struct mddev_dev *devlist = conf_get_devs();
1576         struct map_ent *map = NULL;
1577         int cnt = 0;
1578         int rv = 0;
1579         int failures, successes;
1580
1581         if (conf_verify_devnames(array_list)) {
1582                 pr_err("Duplicate MD device names in "
1583                        "conf file were found.\n");
1584                 return 1;
1585         }
1586         if (devlist == NULL) {
1587                 pr_err("No devices listed in conf file were found.\n");
1588                 return 1;
1589         }
1590         for (a = array_list; a ; a = a->next) {
1591                 a->assembled = 0;
1592                 if (a->autof == 0)
1593                         a->autof = c->autof;
1594         }
1595         if (map_lock(&map))
1596                 pr_err("%s: failed to get "
1597                        "exclusive lock on mapfile\n",
1598                        __func__);
1599         do {
1600                 failures = 0;
1601                 successes = 0;
1602                 rv = 0;
1603                 for (a = array_list; a ; a = a->next) {
1604                         int r;
1605                         if (a->assembled)
1606                                 continue;
1607                         if (a->devname &&
1608                             strcasecmp(a->devname, "<ignore>") == 0)
1609                                 continue;
1610
1611                         r = Assemble(ss, a->devname,
1612                                      a, NULL, c);
1613                         if (r == 0) {
1614                                 a->assembled = 1;
1615                                 successes++;
1616                         } else
1617                                 failures++;
1618                         rv |= r;
1619                         cnt++;
1620                 }
1621         } while (failures && successes);
1622         if (c->homehost && cnt == 0) {
1623                 /* Maybe we can auto-assemble something.
1624                  * Repeatedly call Assemble in auto-assemble mode
1625                  * until it fails
1626                  */
1627                 int rv2;
1628                 int acnt;
1629                 ident->autof = c->autof;
1630                 do {
1631                         struct mddev_dev *devlist = conf_get_devs();
1632                         acnt = 0;
1633                         do {
1634                                 rv2 = Assemble(ss, NULL,
1635                                                ident,
1636                                                devlist, c);
1637                                 if (rv2==0) {
1638                                         cnt++;
1639                                         acnt++;
1640                                 }
1641                         } while (rv2!=2);
1642                         /* Incase there are stacked devices, we need to go around again */
1643                 } while (acnt);
1644                 if (cnt == 0 && rv == 0) {
1645                         pr_err("No arrays found in config file or automatically\n");
1646                         rv = 1;
1647                 } else if (cnt)
1648                         rv = 0;
1649         } else if (cnt == 0 && rv == 0) {
1650                 pr_err("No arrays found in config file\n");
1651                 rv = 1;
1652         }
1653         map_unlock(&map);
1654         return rv;
1655 }
1656
1657 static int misc_scan(char devmode, struct context *c)
1658 {
1659         /* apply --detail or --wait-clean to
1660          * all devices in /proc/mdstat
1661          */
1662         struct mdstat_ent *ms = mdstat_read(0, 1);
1663         struct mdstat_ent *e;
1664         struct map_ent *map = NULL;
1665         int members;
1666         int rv = 0;
1667
1668         for (members = 0; members <= 1; members++) {
1669                 for (e=ms ; e ; e=e->next) {
1670                         char *name = NULL;
1671                         struct map_ent *me;
1672                         struct stat stb;
1673                         int member = e->metadata_version &&
1674                                 strncmp(e->metadata_version,
1675                                         "external:/", 10) == 0;
1676                         if (members != member)
1677                                 continue;
1678                         me = map_by_devnm(&map, e->devnm);
1679                         if (me && me->path
1680                             && strcmp(me->path, "/unknown") != 0)
1681                                 name = me->path;
1682                         if (name == NULL ||
1683                             stat(name, &stb) != 0)
1684                                 name = get_md_name(e->devnm);
1685
1686                         if (!name) {
1687                                 pr_err("cannot find device file for %s\n",
1688                                         e->dev);
1689                                 continue;
1690                         }
1691                         if (devmode == 'D')
1692                                 rv |= Detail(name, c);
1693                         else
1694                                 rv |= WaitClean(name, -1, c->verbose);
1695                         put_md_name(name);
1696                 }
1697         }
1698         free_mdstat(ms);
1699         return rv;
1700 }
1701
1702 static int stop_scan(int verbose)
1703 {
1704         /* apply --stop to all devices in /proc/mdstat */
1705         /* Due to possible stacking of devices, repeat until
1706          * nothing more can be stopped
1707          */
1708         int progress=1, err;
1709         int last = 0;
1710         int rv = 0;
1711         do {
1712                 struct mdstat_ent *ms = mdstat_read(0, 0);
1713                 struct mdstat_ent *e;
1714
1715                 if (!progress) last = 1;
1716                 progress = 0; err = 0;
1717                 for (e=ms ; e ; e=e->next) {
1718                         char *name = get_md_name(e->devnm);
1719                         int mdfd;
1720
1721                         if (!name) {
1722                                 pr_err("cannot find device file for %s\n",
1723                                         e->dev);
1724                                 continue;
1725                         }
1726                         mdfd = open_mddev(name, 1);
1727                         if (mdfd >= 0) {
1728                                 if (Manage_runstop(name, mdfd, -1, verbose, !last))
1729                                         err = 1;
1730                                 else
1731                                         progress = 1;
1732                                 close(mdfd);
1733                         }
1734
1735                         put_md_name(name);
1736                 }
1737                 free_mdstat(ms);
1738         } while (!last && err);
1739         if (err)
1740                 rv |= 1;
1741         return rv;
1742 }
1743
1744 static int misc_list(struct mddev_dev *devlist,
1745                      struct mddev_ident *ident,
1746                      char *dump_directory,
1747                      struct supertype *ss, struct context *c)
1748 {
1749         struct mddev_dev *dv;
1750         int rv = 0;
1751
1752         for (dv=devlist ; dv; dv=(rv & 16) ? NULL : dv->next) {
1753                 int mdfd;
1754
1755                 switch(dv->disposition) {
1756                 case 'D':
1757                         rv |= Detail(dv->devname, c);
1758                         continue;
1759                 case KillOpt: /* Zero superblock */
1760                         if (ss)
1761                                 rv |= Kill(dv->devname, ss, c->force, c->verbose,0);
1762                         else {
1763                                 int v = c->verbose;
1764                                 do {
1765                                         rv |= Kill(dv->devname, NULL, c->force, v, 0);
1766                                         v = -1;
1767                                 } while (rv == 0);
1768                                 rv &= ~2;
1769                         }
1770                         continue;
1771                 case 'Q':
1772                         rv |= Query(dv->devname); continue;
1773                 case 'X':
1774                         rv |= ExamineBitmap(dv->devname, c->brief, ss); continue;
1775                 case ExamineBB:
1776                         rv |= ExamineBadblocks(dv->devname, c->brief, ss); continue;
1777                 case 'W':
1778                 case WaitOpt:
1779                         rv |= Wait(dv->devname); continue;
1780                 case Waitclean:
1781                         rv |= WaitClean(dv->devname, -1, c->verbose); continue;
1782                 case KillSubarray:
1783                         rv |= Kill_subarray(dv->devname, c->subarray, c->verbose);
1784                         continue;
1785                 case UpdateSubarray:
1786                         if (c->update == NULL) {
1787                                 pr_err("-U/--update must be specified with --update-subarray\n");
1788                                 rv |= 1;
1789                                 continue;
1790                         }
1791                         rv |= Update_subarray(dv->devname, c->subarray,
1792                                               c->update, ident, c->verbose);
1793                         continue;
1794                 case Dump:
1795                         rv |= Dump_metadata(dv->devname, dump_directory, c, ss);
1796                         continue;
1797                 case Restore:
1798                         rv |= Restore_metadata(dv->devname, dump_directory, c, ss,
1799                                                (dv == devlist && dv->next == NULL));
1800                         continue;
1801                 }
1802                 mdfd = open_mddev(dv->devname, 1);
1803                 if (mdfd>=0) {
1804                         switch(dv->disposition) {
1805                         case 'R':
1806                                 rv |= Manage_runstop(dv->devname, mdfd, 1, c->verbose, 0); break;
1807                         case 'S':
1808                                 rv |= Manage_runstop(dv->devname, mdfd, -1, c->verbose, 0); break;
1809                         case 'o':
1810                                 rv |= Manage_ro(dv->devname, mdfd, 1); break;
1811                         case 'w':
1812                                 rv |= Manage_ro(dv->devname, mdfd, -1); break;
1813                         }
1814                         close(mdfd);
1815                 } else
1816                         rv |= 1;
1817         }
1818         return rv;
1819 }