mdadm.c

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