mdadm.c

   1 /*
   2  * mdadm - manage Linux "md" devices aka RAID arrays.
   3  *
   4  * Copyright (C) 2001-2013 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 static int scan_assemble(struct supertype *ss,
  33                          struct context *c,
  34                          struct mddev_ident *ident);
  35 static int misc_scan(char devmode, struct context *c);
  36 static int stop_scan(int verbose);
  37 static int misc_list(struct mddev_dev *devlist,
  38                      struct mddev_ident *ident,
  39                      char *dump_directory,
  40                      struct supertype *ss, struct context *c);
  41 const char Name[] = "mdadm";
  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                 .journaldisks   = 0,
  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         enum flag_mode writemostly = FlagDefault;
  93         enum flag_mode failfast = FlagDefault;
  94         char *shortopt = short_options;
  95         int dosyslog = 0;
  96         int rebuild_map = 0;
  97         char *remove_path = NULL;
  98         char *udev_filename = NULL;
  99         char *dump_directory = NULL;
 100
 101         int print_help = 0;
 102         FILE *outf;
 103
 104         int mdfd = -1;
 105
 106         srandom(time(0) ^ getpid());
 107
 108         ident.uuid_set=0;
 109         ident.level = UnSet;
 110         ident.raid_disks = UnSet;
 111         ident.super_minor= UnSet;
 112         ident.devices=0;
 113         ident.spare_group = NULL;
 114         ident.autof = 0;
 115         ident.st = NULL;
 116         ident.bitmap_fd = -1;
 117         ident.bitmap_file = NULL;
 118         ident.name[0] = 0;
 119         ident.container = NULL;
 120         ident.member = NULL;
 121
 122         while ((option_index = -1) ,
 123                (opt=getopt_long(argc, argv,
 124                                 shortopt, long_options,
 125                                 &option_index)) != -1) {
 126                 int newmode = mode;
 127                 /* firstly, some mode-independent options */
 128                 switch(opt) {
 129                 case HelpOptions:
 130                         print_help = 2;
 131                         continue;
 132                 case 'h':
 133                         print_help = 1;
 134                         continue;
 135
 136                 case 'V':
 137                         fputs(Version, stderr);
 138                         exit(0);
 139
 140                 case 'v': c.verbose++;
 141                         continue;
 142
 143                 case 'q': c.verbose--;
 144                         continue;
 145
 146                 case 'b':
 147                         if (mode == ASSEMBLE || mode == BUILD ||
 148                             mode == CREATE || mode == GROW ||
 149                             mode == INCREMENTAL || mode == MANAGE)
 150                                 break; /* b means bitmap */
 151                 case Brief:
 152                         c.brief = 1;
 153                         continue;
 154
 155                 case 'Y': c.export++;
 156                         continue;
 157
 158                 case HomeHost:
 159                         if (strcasecmp(optarg, "<ignore>") == 0)
 160                                 c.require_homehost = 0;
 161                         else
 162                                 c.homehost = optarg;
 163                         continue;
 164
 165                 case OffRootOpt:
 166                         /* Silently ignore old option */
 167                         continue;
 168
 169                 case Prefer:
 170                         if (c.prefer)
 171                                 free(c.prefer);
 172                         if (asprintf(&c.prefer, "/%s/", optarg) <= 0)
 173                                 c.prefer = NULL;
 174                         continue;
 175
 176                 case ':':
 177                 case '?':
 178                         fputs(Usage, stderr);
 179                         exit(2);
 180                 }
 181                 /* second, figure out the mode.
 182                  * Some options force the mode.  Others
 183                  * set the mode if it isn't already
 184                  */
 185
 186                 switch(opt) {
 187                 case ManageOpt:
 188                         newmode = MANAGE;
 189                         shortopt = short_bitmap_options;
 190                         break;
 191                 case 'a':
 192                 case Add:
 193                 case AddSpare:
 194                 case AddJournal:
 195                 case 'r':
 196                 case Remove:
 197                 case Replace:
 198                 case With:
 199                 case 'f':
 200                 case Fail:
 201                 case ReAdd: /* re-add */
 202                 case ClusterConfirm:
 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                 case ExamineBB:
 236                 case Dump:
 237                 case Restore:
 238                 case Action:
 239                         newmode = MISC;
 240                         break;
 241
 242                 case 'R':
 243                 case 'S':
 244                 case 'o':
 245                 case 'w':
 246                 case 'W':
 247                 case WaitOpt:
 248                 case Waitclean:
 249                 case DetailPlatform:
 250                 case KillSubarray:
 251                 case UpdateSubarray:
 252                 case UdevRules:
 253                 case KillOpt:
 254                         if (!mode)
 255                                 newmode = MISC;
 256                         break;
 257
 258                 case NoSharing:
 259                         newmode = MONITOR;
 260                         break;
 261                 }
 262                 if (mode && newmode == mode) {
 263                         /* everybody happy ! */
 264                 } else if (mode && newmode != mode) {
 265                         /* not allowed.. */
 266                         pr_err("");
 267                         if (option_index >= 0)
 268                                 fprintf(stderr, "--%s", long_options[option_index].name);
 269                         else
 270                                 fprintf(stderr, "-%c", opt);
 271                         fprintf(stderr, " would set mdadm mode to \"%s\", but it is already set to \"%s\".\n",
 272                                 map_num(modes, newmode),
 273                                 map_num(modes, mode));
 274                         exit(2);
 275                 } else if (!mode && newmode) {
 276                         mode = newmode;
 277                         if (mode == MISC && devs_found) {
 278                                 pr_err("No action given for %s in --misc mode\n",
 279                                         devlist->devname);
 280                                 cont_err("Action options must come before device names\n");
 281                                 exit(2);
 282                         }
 283                 } else {
 284                         /* special case of -c --help */
 285                         if ((opt == 'c' || opt == ConfigFile) &&
 286                             (strncmp(optarg, "--h", 3) == 0 ||
 287                              strncmp(optarg, "-h", 2) == 0)) {
 288                                 fputs(Help_config, stdout);
 289                                 exit(0);
 290                         }
 291
 292                         /* If first option is a device, don't force the mode yet */
 293                         if (opt == 1) {
 294                                 if (devs_found == 0) {
 295                                         dv = xmalloc(sizeof(*dv));
 296                                         dv->devname = optarg;
 297                                         dv->disposition = devmode;
 298                                         dv->writemostly = writemostly;
 299                                         dv->failfast = failfast;
 300                                         dv->used = 0;
 301                                         dv->next = NULL;
 302                                         *devlistend = dv;
 303                                         devlistend = &dv->next;
 304
 305                                         devs_found++;
 306                                         continue;
 307                                 }
 308                                 /* No mode yet, and this is the second device ... */
 309                                 pr_err("An option must be given to set the mode before a second device\n"
 310                                         "       (%s) is listed\n", optarg);
 311                                 exit(2);
 312                         }
 313                         if (option_index >= 0)
 314                                 pr_err("--%s", long_options[option_index].name);
 315                         else
 316                                 pr_err("-%c", opt);
 317                         fprintf(stderr, " does not set the mode, and so cannot be the first option.\n");
 318                         exit(2);
 319                 }
 320
 321                 /* if we just set the mode, then done */
 322                 switch(opt) {
 323                 case ManageOpt:
 324                 case MiscOpt:
 325                 case 'A':
 326                 case 'B':
 327                 case 'C':
 328                 case 'F':
 329                 case 'G':
 330                 case 'I':
 331                 case AutoDetect:
 332                         continue;
 333                 }
 334                 if (opt == 1) {
 335                         /* an undecorated option - must be a device name.
 336                          */
 337
 338                         if (devs_found > 0 && devmode == DetailPlatform) {
 339                                 pr_err("controller may only be specified once. %s ignored\n",
 340                                                 optarg);
 341                                 continue;
 342                         }
 343
 344                         if (devs_found > 0 && mode == MANAGE && !devmode) {
 345                                 pr_err("Must give one of -a/-r/-f for subsequent devices at %s\n", optarg);
 346                                 exit(2);
 347                         }
 348                         if (devs_found > 0 && mode == GROW && !devmode) {
 349                                 pr_err("Must give -a/--add for devices to add: %s\n", optarg);
 350                                 exit(2);
 351                         }
 352                         dv = xmalloc(sizeof(*dv));
 353                         dv->devname = optarg;
 354                         dv->disposition = devmode;
 355                         dv->writemostly = writemostly;
 356                         dv->failfast = failfast;
 357                         dv->used = 0;
 358                         dv->next = NULL;
 359                         *devlistend = dv;
 360                         devlistend = &dv->next;
 361
 362                         devs_found++;
 363                         continue;
 364                 }
 365
 366                 /* We've got a mode, and opt is now something else which
 367                  * could depend on the mode */
 368 #define O(a,b) ((a<<16)|b)
 369                 switch (O(mode,opt)) {
 370                 case O(GROW,'c'):
 371                 case O(GROW,ChunkSize):
 372                 case O(CREATE,'c'):
 373                 case O(CREATE,ChunkSize):
 374                 case O(BUILD,'c'): /* chunk or rounding */
 375                 case O(BUILD,ChunkSize): /* chunk or rounding */
 376                         if (s.chunk) {
 377                                 pr_err("chunk/rounding may only be specified once. Second value is %s.\n", optarg);
 378                                 exit(2);
 379                         }
 380                         s.chunk = parse_size(optarg);
 381                         if (s.chunk == INVALID_SECTORS ||
 382                             s.chunk < 8 || (s.chunk&1)) {
 383                                 pr_err("invalid chunk/rounding value: %s\n",
 384                                         optarg);
 385                                 exit(2);
 386                         }
 387                         /* Convert sectors to K */
 388                         s.chunk /= 2;
 389                         continue;
 390
 391                 case O(INCREMENTAL, 'e'):
 392                 case O(CREATE,'e'):
 393                 case O(ASSEMBLE,'e'):
 394                 case O(MISC,'e'): /* set metadata (superblock) information */
 395                         if (ss) {
 396                                 pr_err("metadata information already given\n");
 397                                 exit(2);
 398                         }
 399                         for(i=0; !ss && superlist[i]; i++)
 400                                 ss = superlist[i]->match_metadata_desc(optarg);
 401
 402                         if (!ss) {
 403                                 pr_err("unrecognised metadata identifier: %s\n", optarg);
 404                                 exit(2);
 405                         }
 406                         continue;
 407
 408                 case O(MANAGE,'W'):
 409                 case O(MANAGE,WriteMostly):
 410                 case O(BUILD,'W'):
 411                 case O(BUILD,WriteMostly):
 412                 case O(CREATE,'W'):
 413                 case O(CREATE,WriteMostly):
 414                         /* set write-mostly for following devices */
 415                         writemostly = FlagSet;
 416                         continue;
 417
 418                 case O(MANAGE,'w'):
 419                         /* clear write-mostly for following devices */
 420                         writemostly = FlagClear;
 421                         continue;
 422
 423                 case O(MANAGE,FailFast):
 424                 case O(CREATE,FailFast):
 425                         failfast = FlagSet;
 426                         continue;
 427                 case O(MANAGE,NoFailFast):
 428                         failfast = FlagClear;
 429                         continue;
 430
 431                 case O(GROW,'z'):
 432                 case O(CREATE,'z'):
 433                 case O(BUILD,'z'): /* size */
 434                         if (s.size > 0) {
 435                                 pr_err("size may only be specified once. Second value is %s.\n", optarg);
 436                                 exit(2);
 437                         }
 438                         if (strcmp(optarg, "max") == 0)
 439                                 s.size = MAX_SIZE;
 440                         else {
 441                                 s.size = parse_size(optarg);
 442                                 if (s.size == INVALID_SECTORS || s.size < 8) {
 443                                         pr_err("invalid size: %s\n", optarg);
 444                                         exit(2);
 445                                 }
 446                                 /* convert sectors to K */
 447                                 s.size /= 2;
 448                         }
 449                         continue;
 450
 451                 case O(GROW,'Z'): /* array size */
 452                         if (array_size > 0) {
 453                                 pr_err("array-size may only be specified once. 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. Second value is %s.\n", optarg);
 473                                 exit(2);
 474                         }
 475                         if (mode == CREATE && strcmp(optarg, "variable") == 0)
 476                                 data_offset = VARIABLE_OFFSET;
 477                         else
 478                                 data_offset = parse_size(optarg);
 479                         if (data_offset == INVALID_SECTORS) {
 480                                 pr_err("invalid data-offset: %s\n",
 481                                         optarg);
 482                                 exit(2);
 483                         }
 484                         continue;
 485
 486                 case O(GROW,'l'):
 487                 case O(CREATE,'l'):
 488                 case O(BUILD,'l'): /* set raid level*/
 489                         if (s.level != UnSet) {
 490                                 pr_err("raid level may only be set once.  Second value is %s.\n", optarg);
 491                                 exit(2);
 492                         }
 493                         s.level = map_name(pers, optarg);
 494                         if (s.level == UnSet) {
 495                                 pr_err("invalid raid level: %s\n",
 496                                         optarg);
 497                                 exit(2);
 498                         }
 499                         if (s.level != 0 && s.level != LEVEL_LINEAR &&
 500                             s.level != 1 && s.level != LEVEL_MULTIPATH &&
 501                             s.level != LEVEL_FAULTY && s.level != 10 &&
 502                             mode == BUILD) {
 503                                 pr_err("Raid level %s not permitted with --build.\n",
 504                                         optarg);
 505                                 exit(2);
 506                         }
 507                         if (s.sparedisks > 0 && s.level < 1 && s.level >= -1) {
 508                                 pr_err("raid level %s is incompatible with spare-devices setting.\n",
 509                                         optarg);
 510                                 exit(2);
 511                         }
 512                         ident.level = s.level;
 513                         continue;
 514
 515                 case O(GROW, 'p'): /* new layout */
 516                 case O(GROW, Layout):
 517                         if (s.layout_str) {
 518                                 pr_err("layout may only be sent once.  Second value was %s\n", optarg);
 519                                 exit(2);
 520                         }
 521                         s.layout_str = optarg;
 522                         /* 'Grow' will parse the value */
 523                         continue;
 524
 525                 case O(CREATE,'p'): /* raid5 layout */
 526                 case O(CREATE,Layout):
 527                 case O(BUILD,'p'): /* faulty layout */
 528                 case O(BUILD,Layout):
 529                         if (s.layout != UnSet) {
 530                                 pr_err("layout may only be sent once.  Second value was %s\n", optarg);
 531                                 exit(2);
 532                         }
 533                         switch(s.level) {
 534                         default:
 535                                 pr_err("layout not meaningful for %s arrays.\n",
 536                                         map_num(pers, s.level));
 537                                 exit(2);
 538                         case UnSet:
 539                                 pr_err("raid level must be given before layout.\n");
 540                                 exit(2);
 541
 542                         case 5:
 543                                 s.layout = map_name(r5layout, optarg);
 544                                 if (s.layout==UnSet) {
 545                                         pr_err("layout %s not understood for raid5.\n",
 546                                                 optarg);
 547                                         exit(2);
 548                                 }
 549                                 break;
 550                         case 6:
 551                                 s.layout = map_name(r6layout, optarg);
 552                                 if (s.layout==UnSet) {
 553                                         pr_err("layout %s not understood for raid6.\n",
 554                                                 optarg);
 555                                         exit(2);
 556                                 }
 557                                 break;
 558
 559                         case 10:
 560                                 s.layout = parse_layout_10(optarg);
 561                                 if (s.layout < 0) {
 562                                         pr_err("layout for raid10 must be 'nNN', 'oNN' or 'fNN' where NN is a number, not %s\n", optarg);
 563                                         exit(2);
 564                                 }
 565                                 break;
 566                         case LEVEL_FAULTY:
 567                                 /* Faulty
 568                                  * modeNNN
 569                                  */
 570                                 s.layout = parse_layout_faulty(optarg);
 571                                 if (s.layout == -1) {
 572                                         pr_err("layout %s not understood for faulty.\n",
 573                                                 optarg);
 574                                         exit(2);
 575                                 }
 576                                 break;
 577                         }
 578                         continue;
 579
 580                 case O(CREATE,AssumeClean):
 581                 case O(BUILD,AssumeClean): /* assume clean */
 582                 case O(GROW,AssumeClean):
 583                         s.assume_clean = 1;
 584                         continue;
 585
 586                 case O(GROW,'n'):
 587                 case O(CREATE,'n'):
 588                 case O(BUILD,'n'): /* number of raid disks */
 589                         if (s.raiddisks) {
 590                                 pr_err("raid-devices set twice: %d and %s\n",
 591                                         s.raiddisks, optarg);
 592                                 exit(2);
 593                         }
 594                         s.raiddisks = parse_num(optarg);
 595                         if (s.raiddisks <= 0) {
 596                                 pr_err("invalid number of raid devices: %s\n",
 597                                         optarg);
 598                                 exit(2);
 599                         }
 600                         ident.raid_disks = s.raiddisks;
 601                         continue;
 602                 case O(ASSEMBLE, Nodes):
 603                 case O(GROW, Nodes):
 604                 case O(CREATE, Nodes):
 605                         c.nodes = parse_num(optarg);
 606                         if (c.nodes <= 0) {
 607                                 pr_err("invalid number for the number of cluster nodes: %s\n",
 608                                         optarg);
 609                                 exit(2);
 610                         }
 611                         continue;
 612                 case O(CREATE, ClusterName):
 613                 case O(ASSEMBLE, ClusterName):
 614                         c.homecluster = optarg;
 615                         if (strlen(c.homecluster) > 64) {
 616                                 pr_err("Cluster name too big.\n");
 617                                 exit(ERANGE);
 618                         }
 619                         continue;
 620                 case O(CREATE,'x'): /* number of spare (eXtra) disks */
 621                         if (s.sparedisks) {
 622                                 pr_err("spare-devices set twice: %d and %s\n",
 623                                        s.sparedisks, optarg);
 624                                 exit(2);
 625                         }
 626                         if (s.level != UnSet && s.level <= 0 && s.level >= -1) {
 627                                 pr_err("spare-devices setting is incompatible with raid level %d\n",
 628                                         s.level);
 629                                 exit(2);
 630                         }
 631                         s.sparedisks = parse_num(optarg);
 632                         if (s.sparedisks < 0) {
 633                                 pr_err("invalid number of spare-devices: %s\n",
 634                                         optarg);
 635                                 exit(2);
 636                         }
 637                         continue;
 638
 639                 case O(CREATE,'a'):
 640                 case O(CREATE,Auto):
 641                 case O(BUILD,'a'):
 642                 case O(BUILD,Auto):
 643                 case O(INCREMENTAL,'a'):
 644                 case O(INCREMENTAL,Auto):
 645                 case O(ASSEMBLE,'a'):
 646                 case O(ASSEMBLE,Auto): /* auto-creation of device node */
 647                         c.autof = parse_auto(optarg, "--auto flag", 0);
 648                         continue;
 649
 650                 case O(CREATE,Symlinks):
 651                 case O(BUILD,Symlinks):
 652                 case O(ASSEMBLE,Symlinks): /* auto creation of symlinks in /dev to /dev/md */
 653                         symlinks = optarg;
 654                         continue;
 655
 656                 case O(BUILD,'f'): /* force honouring '-n 1' */
 657                 case O(BUILD,Force): /* force honouring '-n 1' */
 658                 case O(GROW,'f'): /* ditto */
 659                 case O(GROW,Force): /* ditto */
 660                 case O(CREATE,'f'): /* force honouring of device list */
 661                 case O(CREATE,Force): /* force honouring of device list */
 662                 case O(ASSEMBLE,'f'): /* force assembly */
 663                 case O(ASSEMBLE,Force): /* force assembly */
 664                 case O(MISC,'f'): /* force zero */
 665                 case O(MISC,Force): /* force zero */
 666                 case O(MANAGE,Force): /* add device which is too large */
 667                         c.force=1;
 668                         continue;
 669                         /* now for the Assemble options */
 670                 case O(ASSEMBLE, FreezeReshape):   /* Freeze reshape during
 671                                                     * initrd phase */
 672                 case O(INCREMENTAL, FreezeReshape):
 673                         c.freeze_reshape = 1;
 674                         continue;
 675                 case O(CREATE,'u'): /* uuid of array */
 676                 case O(ASSEMBLE,'u'): /* uuid of array */
 677                         if (ident.uuid_set) {
 678                                 pr_err("uuid cannot be set twice.  Second value %s.\n", optarg);
 679                                 exit(2);
 680                         }
 681                         if (parse_uuid(optarg, ident.uuid))
 682                                 ident.uuid_set = 1;
 683                         else {
 684                                 pr_err("Bad uuid: %s\n", optarg);
 685                                 exit(2);
 686                         }
 687                         continue;
 688
 689                 case O(CREATE,'N'):
 690                 case O(ASSEMBLE,'N'):
 691                 case O(MISC,'N'):
 692                         if (ident.name[0]) {
 693                                 pr_err("name cannot be set twice.   Second value %s.\n", optarg);
 694                                 exit(2);
 695                         }
 696                         if (mode == MISC && !c.subarray) {
 697                                 pr_err("-N/--name only valid with --update-subarray in misc mode\n");
 698                                 exit(2);
 699                         }
 700                         if (strlen(optarg) > 32) {
 701                                 pr_err("name '%s' is too long, 32 chars max.\n",
 702                                         optarg);
 703                                 exit(2);
 704                         }
 705                         strcpy(ident.name, optarg);
 706                         continue;
 707
 708                 case O(ASSEMBLE,'m'): /* super-minor for array */
 709                 case O(ASSEMBLE,SuperMinor):
 710                         if (ident.super_minor != UnSet) {
 711                                 pr_err("super-minor cannot be set twice.  Second value: %s.\n", optarg);
 712                                 exit(2);
 713                         }
 714                         if (strcmp(optarg, "dev") == 0)
 715                                 ident.super_minor = -2;
 716                         else {
 717                                 ident.super_minor = parse_num(optarg);
 718                                 if (ident.super_minor < 0) {
 719                                         pr_err("Bad super-minor number: %s.\n", optarg);
 720                                         exit(2);
 721                                 }
 722                         }
 723                         continue;
 724
 725                 case O(ASSEMBLE,'o'):
 726                 case O(MANAGE,'o'):
 727                 case O(CREATE,'o'):
 728                         c.readonly = 1;
 729                         continue;
 730
 731                 case O(ASSEMBLE,'U'): /* update the superblock */
 732                 case O(MISC,'U'):
 733                         if (c.update) {
 734                                 pr_err("Can only update one aspect of superblock, both %s and %s given.\n",
 735                                         c.update, optarg);
 736                                 exit(2);
 737                         }
 738                         if (mode == MISC && !c.subarray) {
 739                                 pr_err("Only subarrays can be updated in misc mode\n");
 740                                 exit(2);
 741                         }
 742                         c.update = optarg;
 743                         if (strcmp(c.update, "sparc2.2") == 0)
 744                                 continue;
 745                         if (strcmp(c.update, "super-minor") == 0)
 746                                 continue;
 747                         if (strcmp(c.update, "summaries") == 0)
 748                                 continue;
 749                         if (strcmp(c.update, "resync") == 0)
 750                                 continue;
 751                         if (strcmp(c.update, "uuid") == 0)
 752                                 continue;
 753                         if (strcmp(c.update, "name") == 0)
 754                                 continue;
 755                         if (strcmp(c.update, "homehost") == 0)
 756                                 continue;
 757                         if (strcmp(c.update, "home-cluster") == 0)
 758                                 continue;
 759                         if (strcmp(c.update, "nodes") == 0)
 760                                 continue;
 761                         if (strcmp(c.update, "devicesize") == 0)
 762                                 continue;
 763                         if (strcmp(c.update, "no-bitmap") == 0)
 764                                 continue;
 765                         if (strcmp(c.update, "bbl") == 0)
 766                                 continue;
 767                         if (strcmp(c.update, "no-bbl") == 0)
 768                                 continue;
 769                         if (strcmp(c.update, "force-no-bbl") == 0)
 770                                 continue;
 771                         if (strcmp(c.update, "metadata") == 0)
 772                                 continue;
 773                         if (strcmp(c.update, "revert-reshape") == 0)
 774                                 continue;
 775                         if (strcmp(c.update, "byteorder")==0) {
 776                                 if (ss) {
 777                                         pr_err("must not set metadata type with --update=byteorder.\n");
 778                                         exit(2);
 779                                 }
 780                                 for(i=0; !ss && superlist[i]; i++)
 781                                         ss = superlist[i]->match_metadata_desc(
 782                                                 "0.swap");
 783                                 if (!ss) {
 784                                         pr_err("INTERNAL ERROR cannot find 0.swap\n");
 785                                         exit(2);
 786                                 }
 787
 788                                 continue;
 789                         }
 790                         if (strcmp(c.update,"?") == 0 ||
 791                             strcmp(c.update, "help") == 0) {
 792                                 outf = stdout;
 793                                 fprintf(outf, "%s: ", Name);
 794                         } else {
 795                                 outf = stderr;
 796                                 fprintf(outf,
 797                                         "%s: '--update=%s' is invalid.  ",
 798                                         Name, c.update);
 799                         }
 800                         fprintf(outf, "Valid --update options are:\n"
 801                 "     'sparc2.2', 'super-minor', 'uuid', 'name', 'nodes', 'resync',\n"
 802                 "     'summaries', 'homehost', 'home-cluster', 'byteorder', 'devicesize',\n"
 803                 "     'no-bitmap', 'metadata', 'revert-reshape'\n"
 804                 "     'bbl', 'no-bbl', 'force-no-bbl'\n"
 805                                 );
 806                         exit(outf == stdout ? 0 : 2);
 807
 808                 case O(MANAGE,'U'):
 809                         /* update=devicesize is allowed with --re-add */
 810                         if (devmode != 'A') {
 811                                 pr_err("--update in Manage mode only allowed with --re-add.\n");
 812                                 exit(1);
 813                         }
 814                         if (c.update) {
 815                                 pr_err("Can only update one aspect of superblock, both %s and %s given.\n",
 816                                         c.update, optarg);
 817                                 exit(2);
 818                         }
 819                         c.update = optarg;
 820                         if (strcmp(c.update, "devicesize") != 0 &&
 821                             strcmp(c.update, "bbl") != 0 &&
 822                             strcmp(c.update, "force-no-bbl") != 0 &&
 823                             strcmp(c.update, "no-bbl") != 0) {
 824                                 pr_err("only 'devicesize', 'bbl', 'no-bbl', and 'force-no-bbl' can be updated with --re-add\n");
 825                                 exit(2);
 826                         }
 827                         continue;
 828
 829                 case O(INCREMENTAL,NoDegraded):
 830                         pr_err("--no-degraded is deprecated in Incremental mode\n");
 831                 case O(ASSEMBLE,NoDegraded): /* --no-degraded */
 832                         c.runstop = -1; /* --stop isn't allowed for --assemble,
 833                                          * so we overload slightly */
 834                         continue;
 835
 836                 case O(ASSEMBLE,'c'):
 837                 case O(ASSEMBLE,ConfigFile):
 838                 case O(INCREMENTAL, 'c'):
 839                 case O(INCREMENTAL, ConfigFile):
 840                 case O(MISC, 'c'):
 841                 case O(MISC, ConfigFile):
 842                 case O(MONITOR,'c'):
 843                 case O(MONITOR,ConfigFile):
 844                 case O(CREATE,ConfigFile):
 845                         if (configfile) {
 846                                 pr_err("configfile cannot be set twice.  Second value is %s.\n", optarg);
 847                                 exit(2);
 848                         }
 849                         configfile = optarg;
 850                         set_conffile(configfile);
 851                         /* FIXME possibly check that config file exists.  Even parse it */
 852                         continue;
 853                 case O(ASSEMBLE,'s'): /* scan */
 854                 case O(MISC,'s'):
 855                 case O(MONITOR,'s'):
 856                 case O(INCREMENTAL,'s'):
 857                         c.scan = 1;
 858                         continue;
 859
 860                 case O(MONITOR,'m'): /* mail address */
 861                 case O(MONITOR,EMail):
 862                         if (mailaddr)
 863                                 pr_err("only specify one mailaddress. %s ignored.\n",
 864                                         optarg);
 865                         else
 866                                 mailaddr = optarg;
 867                         continue;
 868
 869                 case O(MONITOR,'p'): /* alert program */
 870                 case O(MONITOR,ProgramOpt): /* alert program */
 871                         if (program)
 872                                 pr_err("only specify one alter program. %s ignored.\n",
 873                                         optarg);
 874                         else
 875                                 program = optarg;
 876                         continue;
 877
 878                 case O(MONITOR,'r'): /* rebuild increments */
 879                 case O(MONITOR,Increment):
 880                         increments = atoi(optarg);
 881                         if (increments > 99 || increments < 1) {
 882                                 pr_err("please specify positive integer between 1 and 99 as rebuild increments.\n");
 883                                 exit(2);
 884                         }
 885                         continue;
 886
 887                 case O(MONITOR,'d'): /* delay in seconds */
 888                 case O(GROW, 'd'):
 889                 case O(BUILD,'d'): /* delay for bitmap updates */
 890                 case O(CREATE,'d'):
 891                         if (c.delay)
 892                                 pr_err("only specify delay once. %s ignored.\n",
 893                                         optarg);
 894                         else {
 895                                 c.delay = parse_num(optarg);
 896                                 if (c.delay < 1) {
 897                                         pr_err("invalid delay: %s\n",
 898                                                 optarg);
 899                                         exit(2);
 900                                 }
 901                         }
 902                         continue;
 903                 case O(MONITOR,'f'): /* daemonise */
 904                 case O(MONITOR,Fork):
 905                         daemonise = 1;
 906                         continue;
 907                 case O(MONITOR,'i'): /* pid */
 908                         if (pidfile)
 909                                 pr_err("only specify one pid file. %s ignored.\n",
 910                                         optarg);
 911                         else
 912                                 pidfile = optarg;
 913                         continue;
 914                 case O(MONITOR,'1'): /* oneshot */
 915                         oneshot = 1;
 916                         spare_sharing = 0;
 917                         continue;
 918                 case O(MONITOR,'t'): /* test */
 919                         c.test = 1;
 920                         continue;
 921                 case O(MONITOR,'y'): /* log messages to syslog */
 922                         openlog("mdadm", LOG_PID, SYSLOG_FACILITY);
 923                         dosyslog = 1;
 924                         continue;
 925                 case O(MONITOR, NoSharing):
 926                         spare_sharing = 0;
 927                         continue;
 928
 929                         /* now the general management options.  Some are applicable
 930                          * to other modes. None have arguments.
 931                          */
 932                 case O(GROW,'a'):
 933                 case O(GROW,Add):
 934                 case O(MANAGE,'a'):
 935                 case O(MANAGE,Add): /* add a drive */
 936                         devmode = 'a';
 937                         continue;
 938                 case O(MANAGE,AddSpare): /* add drive - never re-add */
 939                         devmode = 'S';
 940                         continue;
 941                 case O(MANAGE,AddJournal): /* add journal */
 942                         if (s.journaldisks && (s.level < 4 || s.level > 6)) {
 943                                 pr_err("--add-journal is only supported for RAID level 4/5/6.\n");
 944                                 exit(2);
 945                         }
 946                         devmode = 'j';
 947                         continue;
 948                 case O(MANAGE,ReAdd):
 949                         devmode = 'A';
 950                         continue;
 951                 case O(MANAGE,'r'): /* remove a drive */
 952                 case O(MANAGE,Remove):
 953                         devmode = 'r';
 954                         continue;
 955                 case O(MANAGE,'f'): /* set faulty */
 956                 case O(MANAGE,Fail):
 957                 case O(INCREMENTAL,'f'):
 958                 case O(INCREMENTAL,Remove):
 959                 case O(INCREMENTAL,Fail): /* r for incremental is taken, use f
 960                                            * even though we will both fail and
 961                                            * remove the device */
 962                         devmode = 'f';
 963                         continue;
 964                 case O(MANAGE, ClusterConfirm):
 965                         devmode = 'c';
 966                         continue;
 967                 case O(MANAGE,Replace):
 968                         /* Mark these devices for replacement */
 969                         devmode = 'R';
 970                         continue;
 971                 case O(MANAGE,With):
 972                         /* These are the replacements to use */
 973                         if (devmode != 'R') {
 974                                 pr_err("--with must follow --replace\n");
 975                                 exit(2);
 976                         }
 977                         devmode = 'W';
 978                         continue;
 979                 case O(INCREMENTAL,'R'):
 980                 case O(MANAGE,'R'):
 981                 case O(ASSEMBLE,'R'):
 982                 case O(BUILD,'R'):
 983                 case O(CREATE,'R'): /* Run the array */
 984                         if (c.runstop < 0) {
 985                                 pr_err("Cannot both Stop and Run an array\n");
 986                                 exit(2);
 987                         }
 988                         c.runstop = 1;
 989                         continue;
 990                 case O(MANAGE,'S'):
 991                         if (c.runstop > 0) {
 992                                 pr_err("Cannot both Run and Stop an array\n");
 993                                 exit(2);
 994                         }
 995                         c.runstop = -1;
 996                         continue;
 997                 case O(MANAGE,'t'):
 998                         c.test = 1;
 999                         continue;
1000
1001                 case O(MISC,'Q'):
1002                 case O(MISC,'D'):
1003                 case O(MISC,'E'):
1004                 case O(MISC,KillOpt):
1005                 case O(MISC,'R'):
1006                 case O(MISC,'S'):
1007                 case O(MISC,'X'):
1008                 case O(MISC, ExamineBB):
1009                 case O(MISC,'o'):
1010                 case O(MISC,'w'):
1011                 case O(MISC,'W'):
1012                 case O(MISC, WaitOpt):
1013                 case O(MISC, Waitclean):
1014                 case O(MISC, DetailPlatform):
1015                 case O(MISC, KillSubarray):
1016                 case O(MISC, UpdateSubarray):
1017                 case O(MISC, Dump):
1018                 case O(MISC, Restore):
1019                 case O(MISC ,Action):
1020                         if (opt == KillSubarray || opt == UpdateSubarray) {
1021                                 if (c.subarray) {
1022                                         pr_err("subarray can only be specified once\n");
1023                                         exit(2);
1024                                 }
1025                                 c.subarray = optarg;
1026                         }
1027                         if (opt == Action) {
1028                                 if (c.action) {
1029                                         pr_err("Only one --action can be specified\n");
1030                                         exit(2);
1031                                 }
1032                                 if (strcmp(optarg, "idle") == 0 ||
1033                                     strcmp(optarg, "frozen") == 0 ||
1034                                     strcmp(optarg, "check") == 0 ||
1035                                     strcmp(optarg, "repair") == 0)
1036                                         c.action = optarg;
1037                                 else {
1038                                         pr_err("action must be one of idle, frozen, check, repair\n");
1039                                         exit(2);
1040                                 }
1041                         }
1042                         if (devmode && devmode != opt &&
1043                             (devmode == 'E' ||
1044                              (opt == 'E' && devmode != 'Q'))) {
1045                                 pr_err("--examine/-E cannot be given with ");
1046                                 if (devmode == 'E') {
1047                                         if (option_index >= 0)
1048                                                 fprintf(stderr, "--%s\n",
1049                                                         long_options[option_index].name);
1050                                         else
1051                                                 fprintf(stderr, "-%c\n", opt);
1052                                 } else if (isalpha(devmode))
1053                                         fprintf(stderr, "-%c\n", devmode);
1054                                 else
1055                                         fprintf(stderr, "previous option\n");
1056                                 exit(2);
1057                         }
1058                         devmode = opt;
1059                         if (opt == Dump || opt == Restore) {
1060                                 if (dump_directory != NULL) {
1061                                         pr_err("dump/restore directory specified twice: %s and %s\n",
1062                                                dump_directory, optarg);
1063                                         exit(2);
1064                                 }
1065                                 dump_directory = optarg;
1066                         }
1067                         continue;
1068                 case O(MISC, UdevRules):
1069                         if (devmode && devmode != opt) {
1070                                 pr_err("--udev-rules must be the only option.\n");
1071                         } else {
1072                                 if (udev_filename)
1073                                         pr_err("only specify one udev rule filename. %s ignored.\n",
1074                                                 optarg);
1075                                 else
1076                                         udev_filename = optarg;
1077                         }
1078                         devmode = opt;
1079                         continue;
1080                 case O(MISC,'t'):
1081                         c.test = 1;
1082                         continue;
1083
1084                 case O(MISC, Sparc22):
1085                         if (devmode != 'E') {
1086                                 pr_err("--sparc2.2 only allowed with --examine\n");
1087                                 exit(2);
1088                         }
1089                         c.SparcAdjust = 1;
1090                         continue;
1091
1092                 case O(ASSEMBLE,'b'): /* here we simply set the bitmap file */
1093                 case O(ASSEMBLE,Bitmap):
1094                         if (!optarg) {
1095                                 pr_err("bitmap file needed with -b in --assemble mode\n");
1096                                 exit(2);
1097                         }
1098                         if (strcmp(optarg, "internal") == 0) {
1099                                 pr_err("there is no need to specify --bitmap when assembling arrays with internal bitmaps\n");
1100                                 continue;
1101                         }
1102                         bitmap_fd = open(optarg, O_RDWR);
1103                         if (!*optarg || bitmap_fd < 0) {
1104                                 pr_err("cannot open bitmap file %s: %s\n", optarg, strerror(errno));
1105                                 exit(2);
1106                         }
1107                         ident.bitmap_fd = bitmap_fd; /* for Assemble */
1108                         continue;
1109
1110                 case O(ASSEMBLE, BackupFile):
1111                 case O(GROW, BackupFile):
1112                         /* Specify a file into which grow might place a backup,
1113                          * or from which assemble might recover a backup
1114                          */
1115                         if (c.backup_file) {
1116                                 pr_err("backup file already specified, rejecting %s\n", optarg);
1117                                 exit(2);
1118                         }
1119                         c.backup_file = optarg;
1120                         continue;
1121
1122                 case O(GROW, Continue):
1123                         /* Continue interrupted grow
1124                          */
1125                         grow_continue = 1;
1126                         continue;
1127                 case O(ASSEMBLE, InvalidBackup):
1128                         /* Acknowledge that the backupfile is invalid, but ask
1129                          * to continue anyway
1130                          */
1131                         c.invalid_backup = 1;
1132                         continue;
1133
1134                 case O(BUILD,'b'):
1135                 case O(BUILD,Bitmap):
1136                 case O(CREATE,'b'):
1137                 case O(CREATE,Bitmap): /* here we create the bitmap */
1138                 case O(GROW,'b'):
1139                 case O(GROW,Bitmap):
1140                         if (strcmp(optarg, "internal") == 0 ||
1141                             strcmp(optarg, "none") == 0 ||
1142                             strchr(optarg, '/') != NULL) {
1143                                 s.bitmap_file = optarg;
1144                                 continue;
1145                         }
1146                         if (strcmp(optarg, "clustered") == 0) {
1147                                 s.bitmap_file = optarg;
1148                                 /* Set the default number of cluster nodes
1149                                  * to 4 if not already set by user
1150                                  */
1151                                 if (c.nodes < 1)
1152                                         c.nodes = 4;
1153                                 continue;
1154                         }
1155                         /* probable typo */
1156                         pr_err("bitmap file must contain a '/', or be 'internal', or be 'clustered', or 'none'\n"
1157                                 "       not '%s'\n", optarg);
1158                         exit(2);
1159
1160                 case O(GROW,BitmapChunk):
1161                 case O(BUILD,BitmapChunk):
1162                 case O(CREATE,BitmapChunk): /* bitmap chunksize */
1163                         s.bitmap_chunk = parse_size(optarg);
1164                         if (s.bitmap_chunk == 0 ||
1165                             s.bitmap_chunk == INVALID_SECTORS ||
1166                             s.bitmap_chunk & (s.bitmap_chunk - 1)) {
1167                                 pr_err("invalid bitmap chunksize: %s\n",
1168                                        optarg);
1169                                 exit(2);
1170                         }
1171                         s.bitmap_chunk = s.bitmap_chunk * 512;
1172                         continue;
1173
1174                 case O(GROW, WriteBehind):
1175                 case O(BUILD, WriteBehind):
1176                 case O(CREATE, WriteBehind): /* write-behind mode */
1177                         s.write_behind = DEFAULT_MAX_WRITE_BEHIND;
1178                         if (optarg) {
1179                                 s.write_behind = parse_num(optarg);
1180                                 if (s.write_behind < 0 ||
1181                                     s.write_behind > 16383) {
1182                                         pr_err("Invalid value for maximum outstanding write-behind writes: %s.\n\tMust be between 0 and 16383.\n", optarg);
1183                                         exit(2);
1184                                 }
1185                         }
1186                         continue;
1187
1188                 case O(INCREMENTAL, 'r'):
1189                 case O(INCREMENTAL, RebuildMapOpt):
1190                         rebuild_map = 1;
1191                         continue;
1192                 case O(INCREMENTAL, IncrementalPath):
1193                         remove_path = optarg;
1194                         continue;
1195                 case O(CREATE, WriteJournal):
1196                         if (s.journaldisks) {
1197                                 pr_err("Please specify only one journal device for the array.\n");
1198                                 pr_err("Ignoring --write-journal %s...\n", optarg);
1199                                 continue;
1200                         }
1201                         dv = xmalloc(sizeof(*dv));
1202                         dv->devname = optarg;
1203                         dv->disposition = 'j';  /* WriteJournal */
1204                         dv->used = 0;
1205                         dv->next = NULL;
1206                         *devlistend = dv;
1207                         devlistend = &dv->next;
1208                         devs_found++;
1209
1210                         s.journaldisks = 1;
1211                         continue;
1212                 }
1213                 /* We have now processed all the valid options. Anything else is
1214                  * an error
1215                  */
1216                 if (option_index > 0)
1217                         pr_err(":option --%s not valid in %s mode\n",
1218                                 long_options[option_index].name,
1219                                 map_num(modes, mode));
1220                 else
1221                         pr_err("option -%c not valid in %s mode\n",
1222                                 opt, map_num(modes, mode));
1223                 exit(2);
1224
1225         }
1226
1227         if (print_help) {
1228                 char *help_text;
1229                 if (print_help == 2)
1230                         help_text = OptionHelp;
1231                 else
1232                         help_text = mode_help[mode];
1233                 if (help_text == NULL)
1234                         help_text = Help;
1235                 fputs(help_text,stdout);
1236                 exit(0);
1237         }
1238
1239         if (s.journaldisks && (s.level < 4 || s.level > 6)) {
1240                 pr_err("--write-journal is only supported for RAID level 4/5/6.\n");
1241                 exit(2);
1242         }
1243
1244         if (!mode && devs_found) {
1245                 mode = MISC;
1246                 devmode = 'Q';
1247                 if (devlist->disposition == 0)
1248                         devlist->disposition = devmode;
1249         }
1250         if (!mode) {
1251                 fputs(Usage, stderr);
1252                 exit(2);
1253         }
1254
1255         if (symlinks) {
1256                 struct createinfo *ci = conf_get_create_info();
1257
1258                 if (strcasecmp(symlinks, "yes") == 0)
1259                         ci->symlinks = 1;
1260                 else if (strcasecmp(symlinks, "no") == 0)
1261                         ci->symlinks = 0;
1262                 else {
1263                         pr_err("option --symlinks must be 'no' or 'yes'\n");
1264                         exit(2);
1265                 }
1266         }
1267         /* Ok, got the option parsing out of the way
1268          * hopefully it's mostly right but there might be some stuff
1269          * missing
1270          *
1271          * That is mosty checked in the per-mode stuff but...
1272          *
1273          * For @,B,C and A without -s, the first device listed must be
1274          * an md device.  We check that here and open it.
1275          */
1276
1277         if (mode == MANAGE || mode == BUILD || mode == CREATE ||
1278             mode == GROW || (mode == ASSEMBLE && ! c.scan)) {
1279                 if (devs_found < 1) {
1280                         pr_err("an md device must be given in this mode\n");
1281                         exit(2);
1282                 }
1283                 if ((int)ident.super_minor == -2 && c.autof) {
1284                         pr_err("--super-minor=dev is incompatible with --auto\n");
1285                         exit(2);
1286                 }
1287                 if (mode == MANAGE || mode == GROW) {
1288                         mdfd = open_mddev(devlist->devname, 1);
1289                         if (mdfd < 0)
1290                                 exit(1);
1291                 } else
1292                         /* non-existent device is OK */
1293                         mdfd = open_mddev(devlist->devname, 0);
1294                 if (mdfd == -2) {
1295                         pr_err("device %s exists but is not an md array.\n", devlist->devname);
1296                         exit(1);
1297                 }
1298                 if ((int)ident.super_minor == -2) {
1299                         struct stat stb;
1300                         if (mdfd < 0) {
1301                                 pr_err("--super-minor=dev given, and listed device %s doesn't exist.\n",
1302                                         devlist->devname);
1303                                 exit(1);
1304                         }
1305                         fstat(mdfd, &stb);
1306                         ident.super_minor = minor(stb.st_rdev);
1307                 }
1308                 if (mdfd >= 0 && mode != MANAGE && mode != GROW) {
1309                         /* We don't really want this open yet, we just might
1310                          * have wanted to check some things
1311                          */
1312                         close(mdfd);
1313                         mdfd = -1;
1314                 }
1315         }
1316
1317         if (s.raiddisks) {
1318                 if (s.raiddisks == 1 &&  !c.force && s.level != LEVEL_FAULTY) {
1319                         pr_err("'1' is an unusual number of drives for an array, so it is probably\n"
1320                                 "     a mistake.  If you really mean it you will need to specify --force before\n"
1321                                 "     setting the number of drives.\n");
1322                         exit(2);
1323                 }
1324         }
1325
1326         if (c.homehost == NULL && c.require_homehost)
1327                 c.homehost = conf_get_homehost(&c.require_homehost);
1328         if (c.homehost == NULL || strcasecmp(c.homehost, "<system>") == 0) {
1329                 if (gethostname(sys_hostname, sizeof(sys_hostname)) == 0) {
1330                         sys_hostname[sizeof(sys_hostname)-1] = 0;
1331                         c.homehost = sys_hostname;
1332                 }
1333         }
1334         if (c.homehost &&
1335             (!c.homehost[0] || strcasecmp(c.homehost, "<none>") == 0)) {
1336                 c.homehost = NULL;
1337                 c.require_homehost = 0;
1338         }
1339
1340         rv = 0;
1341
1342         set_hooks(); /* set hooks from libs */
1343
1344         if (c.homecluster == NULL && (c.nodes > 0)) {
1345                 c.homecluster = conf_get_homecluster();
1346                 if (c.homecluster == NULL)
1347                         rv = get_cluster_name(&c.homecluster);
1348                 if (rv) {
1349                         pr_err("The md can't get cluster name\n");
1350                         exit(1);
1351                 }
1352         }
1353
1354         if (c.backup_file && data_offset != INVALID_SECTORS) {
1355                 pr_err("--backup-file and --data-offset are incompatible\n");
1356                 exit(2);
1357         }
1358
1359         if ((mode == MISC && devmode == 'E') ||
1360             (mode == MONITOR && spare_sharing == 0))
1361                 /* Anyone may try this */;
1362         else if (geteuid() != 0) {
1363                 pr_err("must be super-user to perform this action\n");
1364                 exit(1);
1365         }
1366
1367         ident.autof = c.autof;
1368
1369         if (c.scan && c.verbose < 2)
1370                 /* --scan implied --brief unless -vv */
1371                 c.brief = 1;
1372
1373         switch(mode) {
1374         case MANAGE:
1375                 /* readonly, add/remove, readwrite, runstop */
1376                 if (c.readonly > 0)
1377                         rv = Manage_ro(devlist->devname, mdfd, c.readonly);
1378                 if (!rv && devs_found>1)
1379                         rv = Manage_subdevs(devlist->devname, mdfd,
1380                                             devlist->next, c.verbose, c.test,
1381                                             c.update, c.force);
1382                 if (!rv && c.readonly < 0)
1383                         rv = Manage_ro(devlist->devname, mdfd, c.readonly);
1384                 if (!rv && c.runstop > 0)
1385                         rv = Manage_run(devlist->devname, mdfd, &c);
1386                 if (!rv && c.runstop < 0)
1387                         rv = Manage_stop(devlist->devname, mdfd, c.verbose, 0);
1388                 break;
1389         case ASSEMBLE:
1390                 if (devs_found == 1 && ident.uuid_set == 0 &&
1391                     ident.super_minor == UnSet && ident.name[0] == 0 &&
1392                     !c.scan ) {
1393                         /* Only a device has been given, so get details from config file */
1394                         struct mddev_ident *array_ident = conf_get_ident(devlist->devname);
1395                         if (array_ident == NULL) {
1396                                 pr_err("%s not identified in config file.\n",
1397                                         devlist->devname);
1398                                 rv |= 1;
1399                                 if (mdfd >= 0)
1400                                         close(mdfd);
1401                         } else {
1402                                 if (array_ident->autof == 0)
1403                                         array_ident->autof = c.autof;
1404                                 rv |= Assemble(ss, devlist->devname, array_ident,
1405                                                NULL, &c);
1406                         }
1407                 } else if (!c.scan)
1408                         rv = Assemble(ss, devlist->devname, &ident,
1409                                       devlist->next, &c);
1410                 else if (devs_found > 0) {
1411                         if (c.update && devs_found > 1) {
1412                                 pr_err("can only update a single array at a time\n");
1413                                 exit(1);
1414                         }
1415                         if (c.backup_file && devs_found > 1) {
1416                                 pr_err("can only assemble a single array when providing a backup file.\n");
1417                                 exit(1);
1418                         }
1419                         for (dv = devlist ; dv ; dv=dv->next) {
1420                                 struct mddev_ident *array_ident = conf_get_ident(dv->devname);
1421                                 if (array_ident == NULL) {
1422                                         pr_err("%s not identified in config file.\n",
1423                                                 dv->devname);
1424                                         rv |= 1;
1425                                         continue;
1426                                 }
1427                                 if (array_ident->autof == 0)
1428                                         array_ident->autof = c.autof;
1429                                 rv |= Assemble(ss, dv->devname, array_ident,
1430                                                NULL, &c);
1431                         }
1432                 } else {
1433                         if (c.update) {
1434                                 pr_err("--update not meaningful with a --scan assembly.\n");
1435                                 exit(1);
1436                         }
1437                         if (c.backup_file) {
1438                                 pr_err("--backup_file not meaningful with a --scan assembly.\n");
1439                                 exit(1);
1440                         }
1441                         rv = scan_assemble(ss, &c, &ident);
1442                 }
1443
1444                 break;
1445         case BUILD:
1446                 if (c.delay == 0)
1447                         c.delay = DEFAULT_BITMAP_DELAY;
1448                 if (s.write_behind && !s.bitmap_file) {
1449                         pr_err("write-behind mode requires a bitmap.\n");
1450                         rv = 1;
1451                         break;
1452                 }
1453                 if (s.raiddisks == 0) {
1454                         pr_err("no raid-devices specified.\n");
1455                         rv = 1;
1456                         break;
1457                 }
1458
1459                 if (s.bitmap_file) {
1460                         if (strcmp(s.bitmap_file, "internal") == 0 ||
1461                             strcmp(s.bitmap_file, "clustered") == 0) {
1462                                 pr_err("'internal' and 'clustered' bitmaps not supported with --build\n");
1463                                 rv |= 1;
1464                                 break;
1465                         }
1466                 }
1467                 rv = Build(devlist->devname, devlist->next, &s, &c);
1468                 break;
1469         case CREATE:
1470                 if (c.delay == 0)
1471                         c.delay = DEFAULT_BITMAP_DELAY;
1472
1473                 if (c.nodes) {
1474                         if (!s.bitmap_file ||
1475                             strcmp(s.bitmap_file, "clustered") != 0) {
1476                                 pr_err("--nodes argument only compatible with --bitmap=clustered\n");
1477                                 rv = 1;
1478                                 break;
1479                         }
1480
1481                         if (s.level != 1) {
1482                                 pr_err("--bitmap=clustered is currently supported with RAID mirror only\n");
1483                                 rv = 1;
1484                                 break;
1485                         }
1486                 }
1487
1488                 if (s.write_behind && !s.bitmap_file) {
1489                         pr_err("write-behind mode requires a bitmap.\n");
1490                         rv = 1;
1491                         break;
1492                 }
1493                 if (s.raiddisks == 0) {
1494                         pr_err("no raid-devices specified.\n");
1495                         rv = 1;
1496                         break;
1497                 }
1498
1499                 rv = Create(ss, devlist->devname,
1500                             ident.name, ident.uuid_set ? ident.uuid : NULL,
1501                             devs_found-1, devlist->next,
1502                             &s, &c, data_offset);
1503                 break;
1504         case MISC:
1505                 if (devmode == 'E') {
1506                         if (devlist == NULL && !c.scan) {
1507                                 pr_err("No devices to examine\n");
1508                                 exit(2);
1509                         }
1510                         if (devlist == NULL)
1511                                 devlist = conf_get_devs();
1512                         if (devlist == NULL) {
1513                                 pr_err("No devices listed in %s\n", configfile?configfile:DefaultConfFile);
1514                                 exit(1);
1515                         }
1516                         rv = Examine(devlist, &c, ss);
1517                 } else if (devmode == DetailPlatform) {
1518                         rv = Detail_Platform(ss ? ss->ss : NULL, ss ? c.scan : 1,
1519                                              c.verbose, c.export,
1520                                              devlist ? devlist->devname : NULL);
1521                 } else if (devlist == NULL) {
1522                         if (devmode == 'S' && c.scan)
1523                                 rv = stop_scan(c.verbose);
1524                         else if ((devmode == 'D' || devmode == Waitclean) &&
1525                                  c.scan)
1526                                 rv = misc_scan(devmode, &c);
1527                         else if (devmode == UdevRules)
1528                                 rv = Write_rules(udev_filename);
1529                         else {
1530                                 pr_err("No devices given.\n");
1531                                 exit(2);
1532                         }
1533                 } else
1534                         rv = misc_list(devlist, &ident, dump_directory, ss, &c);
1535                 break;
1536         case MONITOR:
1537                 if (!devlist && !c.scan) {
1538                         pr_err("Cannot monitor: need --scan or at least one device\n");
1539                         rv = 1;
1540                         break;
1541                 }
1542                 if (pidfile && !daemonise) {
1543                         pr_err("Cannot write a pid file when not in daemon mode\n");
1544                         rv = 1;
1545                         break;
1546                 }
1547                 if (c.delay == 0) {
1548                         if (get_linux_version() > 2006016)
1549                                 /* mdstat responds to poll */
1550                                 c.delay = 1000;
1551                         else
1552                                 c.delay = 60;
1553                 }
1554                 rv= Monitor(devlist, mailaddr, program,
1555                             &c, daemonise, oneshot,
1556                             dosyslog, pidfile, increments,
1557                             spare_sharing);
1558                 break;
1559
1560         case GROW:
1561                 if (array_size > 0) {
1562                         /* alway impose array size first, independent of
1563                          * anything else
1564                          * Do not allow level or raid_disks changes at the
1565                          * same time as that can be irreversibly destructive.
1566                          */
1567                         struct mdinfo sra;
1568                         int err;
1569                         if (s.raiddisks || s.level != UnSet) {
1570                                 pr_err("cannot change array size in same operation as changing raiddisks or level.\n"
1571                                         "    Change size first, then check that data is still intact.\n");
1572                                 rv = 1;
1573                                 break;
1574                         }
1575                         sysfs_init(&sra, mdfd, NULL);
1576                         if (array_size == MAX_SIZE)
1577                                 err = sysfs_set_str(&sra, NULL, "array_size", "default");
1578                         else
1579                                 err = sysfs_set_num(&sra, NULL, "array_size", array_size / 2);
1580                         if (err < 0) {
1581                                 if (errno == E2BIG)
1582                                         pr_err("--array-size setting is too large.\n");
1583                                 else
1584                                         pr_err("current kernel does not support setting --array-size\n");
1585                                 rv = 1;
1586                                 break;
1587                         }
1588                 }
1589                 if (devs_found > 1 && s.raiddisks == 0 && s.level == UnSet) {
1590                         /* must be '-a'. */
1591                         if (s.size > 0 || s.chunk ||
1592                             s.layout_str || s.bitmap_file) {
1593                                 pr_err("--add cannot be used with other geometry changes in --grow mode\n");
1594                                 rv = 1;
1595                                 break;
1596                         }
1597                         for (dv=devlist->next; dv ; dv=dv->next) {
1598                                 rv = Grow_Add_device(devlist->devname, mdfd,
1599                                                      dv->devname);
1600                                 if (rv)
1601                                         break;
1602                         }
1603                 } else if (s.bitmap_file) {
1604                         if (s.size > 0 || s.raiddisks || s.chunk ||
1605                             s.layout_str || devs_found > 1) {
1606                                 pr_err("--bitmap changes cannot be used with other geometry changes in --grow mode\n");
1607                                 rv = 1;
1608                                 break;
1609                         }
1610                         if (c.delay == 0)
1611                                 c.delay = DEFAULT_BITMAP_DELAY;
1612                         rv = Grow_addbitmap(devlist->devname, mdfd, &c, &s);
1613                 } else if (grow_continue)
1614                         rv = Grow_continue_command(devlist->devname,
1615                                                    mdfd, c.backup_file,
1616                                                    c.verbose);
1617                 else if (s.size > 0 || s.raiddisks || s.layout_str ||
1618                          s.chunk != 0 || s.level != UnSet ||
1619                          data_offset != INVALID_SECTORS) {
1620                         rv = Grow_reshape(devlist->devname, mdfd,
1621                                           devlist->next,
1622                                           data_offset, &c, &s);
1623                 } else if (array_size == 0)
1624                         pr_err("no changes to --grow\n");
1625                 break;
1626         case INCREMENTAL:
1627                 if (rebuild_map) {
1628                         RebuildMap();
1629                 }
1630                 if (c.scan) {
1631                         rv = 1;
1632                         if (devlist) {
1633                                 pr_err("In --incremental mode, a device cannot be given with --scan.\n");
1634                                 break;
1635                         }
1636                         if (c.runstop <= 0) {
1637                                 pr_err("--incremental --scan meaningless without --run.\n");
1638                                 break;
1639                         }
1640                         if (devmode == 'f') {
1641                                 pr_err("--incremental --scan --fail not supported.\n");
1642                                 break;
1643                         }
1644                         rv = IncrementalScan(&c, NULL);
1645                 }
1646                 if (!devlist) {
1647                         if (!rebuild_map && !c.scan) {
1648                                 pr_err("--incremental requires a device.\n");
1649                                 rv = 1;
1650                         }
1651                         break;
1652                 }
1653                 if (devmode == 'f') {
1654                         if (devlist->next) {
1655                                 pr_err("'--incremental --fail' can only handle one device.\n");
1656                                 rv = 1;
1657                                 break;
1658                         }
1659                         rv = IncrementalRemove(devlist->devname, remove_path,
1660                                                c.verbose);
1661                 } else
1662                         rv = Incremental(devlist, &c, ss);
1663                 break;
1664         case AUTODETECT:
1665                 autodetect();
1666                 break;
1667         }
1668         exit(rv);
1669 }
1670
1671 static int scan_assemble(struct supertype *ss,
1672                          struct context *c,
1673                          struct mddev_ident *ident)
1674 {
1675         struct mddev_ident *a, *array_list =  conf_get_ident(NULL);
1676         struct mddev_dev *devlist = conf_get_devs();
1677         struct map_ent *map = NULL;
1678         int cnt = 0;
1679         int rv = 0;
1680         int failures, successes;
1681
1682         if (conf_verify_devnames(array_list)) {
1683                 pr_err("Duplicate MD device names in conf file were found.\n");
1684                 return 1;
1685         }
1686         if (devlist == NULL) {
1687                 pr_err("No devices listed in conf file were found.\n");
1688                 return 1;
1689         }
1690         for (a = array_list; a ; a = a->next) {
1691                 a->assembled = 0;
1692                 if (a->autof == 0)
1693                         a->autof = c->autof;
1694         }
1695         if (map_lock(&map))
1696                 pr_err("failed to get exclusive lock on mapfile\n");
1697         do {
1698                 failures = 0;
1699                 successes = 0;
1700                 rv = 0;
1701                 for (a = array_list; a ; a = a->next) {
1702                         int r;
1703                         if (a->assembled)
1704                                 continue;
1705                         if (a->devname &&
1706                             strcasecmp(a->devname, "<ignore>") == 0)
1707                                 continue;
1708
1709                         r = Assemble(ss, a->devname,
1710                                      a, NULL, c);
1711                         if (r == 0) {
1712                                 a->assembled = 1;
1713                                 successes++;
1714                         } else
1715                                 failures++;
1716                         rv |= r;
1717                         cnt++;
1718                 }
1719         } while (failures && successes);
1720         if (c->homehost && cnt == 0) {
1721                 /* Maybe we can auto-assemble something.
1722                  * Repeatedly call Assemble in auto-assemble mode
1723                  * until it fails
1724                  */
1725                 int rv2;
1726                 int acnt;
1727                 ident->autof = c->autof;
1728                 do {
1729                         struct mddev_dev *devlist = conf_get_devs();
1730                         acnt = 0;
1731                         do {
1732                                 rv2 = Assemble(ss, NULL,
1733                                                ident,
1734                                                devlist, c);
1735                                 if (rv2 == 0) {
1736                                         cnt++;
1737                                         acnt++;
1738                                 }
1739                         } while (rv2 != 2);
1740                         /* Incase there are stacked devices, we need to go around again */
1741                 } while (acnt);
1742                 if (cnt == 0 && rv == 0) {
1743                         pr_err("No arrays found in config file or automatically\n");
1744                         rv = 1;
1745                 } else if (cnt)
1746                         rv = 0;
1747         } else if (cnt == 0 && rv == 0) {
1748                 pr_err("No arrays found in config file\n");
1749                 rv = 1;
1750         }
1751         map_unlock(&map);
1752         return rv;
1753 }
1754
1755 static int misc_scan(char devmode, struct context *c)
1756 {
1757         /* apply --detail or --wait-clean to
1758          * all devices in /proc/mdstat
1759          */
1760         struct mdstat_ent *ms = mdstat_read(0, 1);
1761         struct mdstat_ent *e;
1762         struct map_ent *map = NULL;
1763         int members;
1764         int rv = 0;
1765
1766         for (members = 0; members <= 1; members++) {
1767                 for (e=ms ; e ; e=e->next) {
1768                         char *name = NULL;
1769                         struct map_ent *me;
1770                         struct stat stb;
1771                         int member = e->metadata_version &&
1772                                 strncmp(e->metadata_version,
1773                                         "external:/", 10) == 0;
1774                         if (members != member)
1775                                 continue;
1776                         me = map_by_devnm(&map, e->devnm);
1777                         if (me && me->path
1778                             && strcmp(me->path, "/unknown") != 0)
1779                                 name = me->path;
1780                         if (name == NULL || stat(name, &stb) != 0)
1781                                 name = get_md_name(e->devnm);
1782
1783                         if (!name) {
1784                                 pr_err("cannot find device file for %s\n",
1785                                         e->devnm);
1786                                 continue;
1787                         }
1788                         if (devmode == 'D')
1789                                 rv |= Detail(name, c);
1790                         else
1791                                 rv |= WaitClean(name, -1, c->verbose);
1792                         put_md_name(name);
1793                 }
1794         }
1795         free_mdstat(ms);
1796         return rv;
1797 }
1798
1799 static int stop_scan(int verbose)
1800 {
1801         /* apply --stop to all devices in /proc/mdstat */
1802         /* Due to possible stacking of devices, repeat until
1803          * nothing more can be stopped
1804          */
1805         int progress=1, err;
1806         int last = 0;
1807         int rv = 0;
1808         do {
1809                 struct mdstat_ent *ms = mdstat_read(0, 0);
1810                 struct mdstat_ent *e;
1811
1812                 if (!progress) last = 1;
1813                 progress = 0; err = 0;
1814                 for (e=ms ; e ; e=e->next) {
1815                         char *name = get_md_name(e->devnm);
1816                         int mdfd;
1817
1818                         if (!name) {
1819                                 pr_err("cannot find device file for %s\n",
1820                                         e->devnm);
1821                                 continue;
1822                         }
1823                         mdfd = open_mddev(name, 1);
1824                         if (mdfd >= 0) {
1825                                 if (Manage_stop(name, mdfd, verbose, !last))
1826                                         err = 1;
1827                                 else
1828                                         progress = 1;
1829                                 close(mdfd);
1830                         }
1831
1832                         put_md_name(name);
1833                 }
1834                 free_mdstat(ms);
1835         } while (!last && err);
1836         if (err)
1837                 rv |= 1;
1838         return rv;
1839 }
1840
1841 static int misc_list(struct mddev_dev *devlist,
1842                      struct mddev_ident *ident,
1843                      char *dump_directory,
1844                      struct supertype *ss, struct context *c)
1845 {
1846         struct mddev_dev *dv;
1847         int rv = 0;
1848
1849         for (dv=devlist ; dv; dv=(rv & 16) ? NULL : dv->next) {
1850                 int mdfd;
1851
1852                 switch(dv->disposition) {
1853                 case 'D':
1854                         rv |= Detail(dv->devname, c);
1855                         continue;
1856                 case KillOpt: /* Zero superblock */
1857                         if (ss)
1858                                 rv |= Kill(dv->devname, ss, c->force, c->verbose,0);
1859                         else {
1860                                 int v = c->verbose;
1861                                 do {
1862                                         rv |= Kill(dv->devname, NULL, c->force, v, 0);
1863                                         v = -1;
1864                                 } while (rv == 0);
1865                                 rv &= ~2;
1866                         }
1867                         continue;
1868                 case 'Q':
1869                         rv |= Query(dv->devname); continue;
1870                 case 'X':
1871                         rv |= ExamineBitmap(dv->devname, c->brief, ss); continue;
1872                 case ExamineBB:
1873                         rv |= ExamineBadblocks(dv->devname, c->brief, ss); continue;
1874                 case 'W':
1875                 case WaitOpt:
1876                         rv |= Wait(dv->devname); continue;
1877                 case Waitclean:
1878                         rv |= WaitClean(dv->devname, -1, c->verbose); continue;
1879                 case KillSubarray:
1880                         rv |= Kill_subarray(dv->devname, c->subarray, c->verbose);
1881                         continue;
1882                 case UpdateSubarray:
1883                         if (c->update == NULL) {
1884                                 pr_err("-U/--update must be specified with --update-subarray\n");
1885                                 rv |= 1;
1886                                 continue;
1887                         }
1888                         rv |= Update_subarray(dv->devname, c->subarray,
1889                                               c->update, ident, c->verbose);
1890                         continue;
1891                 case Dump:
1892                         rv |= Dump_metadata(dv->devname, dump_directory, c, ss);
1893                         continue;
1894                 case Restore:
1895                         rv |= Restore_metadata(dv->devname, dump_directory, c, ss,
1896                                                (dv == devlist && dv->next == NULL));
1897                         continue;
1898                 case Action:
1899                         rv |= SetAction(dv->devname, c->action);
1900                         continue;
1901                 }
1902                 if (dv->devname[0] == '/')
1903                         mdfd = open_mddev(dv->devname, 1);
1904                 else {
1905                         mdfd = open_dev(dv->devname);
1906                         if (mdfd < 0)
1907                                 pr_err("Cannot open %s\n", dv->devname);
1908                 }
1909                 if (mdfd>=0) {
1910                         switch(dv->disposition) {
1911                         case 'R':
1912                                 c->runstop = 1;
1913                                 rv |= Manage_run(dv->devname, mdfd, c); break;
1914                         case 'S':
1915                                 rv |= Manage_stop(dv->devname, mdfd, c->verbose, 0); break;
1916                         case 'o':
1917                                 rv |= Manage_ro(dv->devname, mdfd, 1); break;
1918                         case 'w':
1919                                 rv |= Manage_ro(dv->devname, mdfd, -1); break;
1920                         }
1921                         close(mdfd);
1922                 } else
1923                         rv |= 1;
1924         }
1925         return rv;
1926 }
1927
1928 int SetAction(char *dev, char *action)
1929 {
1930         int fd = open(dev, O_RDONLY);
1931         struct mdinfo mdi;
1932         if (fd < 0) {
1933                 pr_err("Couldn't open %s: %s\n", dev, strerror(errno));
1934                 return 1;
1935         }
1936         sysfs_init(&mdi, fd, NULL);
1937         close(fd);
1938         if (!mdi.sys_name[0]) {
1939                 pr_err("%s is no an md array\n", dev);
1940                 return 1;
1941         }
1942
1943         if (sysfs_set_str(&mdi, NULL, "sync_action", action) < 0) {
1944                 pr_err("Count not set action for %s to %s: %s\n",
1945                        dev, action, strerror(errno));
1946                 return 1;
1947         }
1948         return 0;
1949 }