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(int autof, struct supertype *ss,
  34                          int readonly, int runstop,
  35                          struct mddev_ident *ident,
  36                          char *homehost, int require_homehost,
  37                          int verbose, int force,
  38                          int freeze_reshape);
  39 static int misc_scan(char devmode, int verbose, int export, int test,
  40                      char *homehost, char *prefer);
  41 static int stop_scan(int quiet);
  42 static int misc_list(struct mddev_dev *devlist,
  43                      int brief, int verbose, int export, int test,
  44                      char *homehost, char *prefer, char *subarray,
  45                      char *update, struct mddev_ident *ident,
  46                      struct supertype *ss, int force, int quiet);
  47
  48
  49 int main(int argc, char *argv[])
  50 {
  51         int mode = 0;
  52         int opt;
  53         int option_index;
  54         char *c;
  55         int rv;
  56         int i;
  57
  58         int chunk = 0;
  59         long long size = -1;
  60         long long array_size = -1;
  61         int level = UnSet;
  62         int layout = UnSet;
  63         char *layout_str = NULL;
  64         int raiddisks = 0;
  65         int sparedisks = 0;
  66         struct mddev_ident ident;
  67         char *configfile = NULL;
  68         char *cp;
  69         char *update = NULL;
  70         int scan = 0;
  71         int devmode = 0;
  72         int runstop = 0;
  73         int readonly = 0;
  74         int write_behind = 0;
  75         int bitmap_fd = -1;
  76         char *bitmap_file = NULL;
  77         char *backup_file = NULL;
  78         int invalid_backup = 0;
  79         int bitmap_chunk = UnSet;
  80         int SparcAdjust = 0;
  81         struct mddev_dev *devlist = NULL;
  82         struct mddev_dev **devlistend = & devlist;
  83         struct mddev_dev *dv;
  84         int devs_found = 0;
  85         int verbose = 0;
  86         int quiet = 0;
  87         int brief = 0;
  88         int force = 0;
  89         int test = 0;
  90         int export = 0;
  91         int assume_clean = 0;
  92         char *prefer = NULL;
  93         char *symlinks = NULL;
  94         int grow_continue = 0;
  95         /* autof indicates whether and how to create device node.
  96          * bottom 3 bits are style.  Rest (when shifted) are number of parts
  97          * 0  - unset
  98          * 1  - don't create (no)
  99          * 2  - if is_standard, then create (yes)
 100          * 3  - create as 'md' - reject is_standard mdp (md)
 101          * 4  - create as 'mdp' - reject is_standard md (mdp)
 102          * 5  - default to md if not is_standard (md in config file)
 103          * 6  - default to mdp if not is_standard (part, or mdp in config file)
 104          */
 105         int autof = 0;
 106
 107         char *homehost = NULL;
 108         char sys_hostname[256];
 109         int require_homehost = 1;
 110         char *mailaddr = NULL;
 111         char *program = NULL;
 112         int increments = 20;
 113         int delay = 0;
 114         int daemonise = 0;
 115         char *pidfile = NULL;
 116         int oneshot = 0;
 117         int spare_sharing = 1;
 118         struct supertype *ss = NULL;
 119         int writemostly = 0;
 120         char *shortopt = short_options;
 121         int dosyslog = 0;
 122         int rebuild_map = 0;
 123         char *subarray = NULL;
 124         char *remove_path = NULL;
 125         char *udev_filename = NULL;
 126
 127         int print_help = 0;
 128         FILE *outf;
 129
 130         int mdfd = -1;
 131
 132         int freeze_reshape = 0;
 133
 134         srandom(time(0) ^ getpid());
 135
 136         ident.uuid_set=0;
 137         ident.level = UnSet;
 138         ident.raid_disks = UnSet;
 139         ident.super_minor= UnSet;
 140         ident.devices=0;
 141         ident.spare_group = NULL;
 142         ident.autof = 0;
 143         ident.st = NULL;
 144         ident.bitmap_fd = -1;
 145         ident.bitmap_file = NULL;
 146         ident.name[0] = 0;
 147         ident.container = NULL;
 148         ident.member = NULL;
 149
 150         while ((option_index = -1) ,
 151                (opt=getopt_long(argc, argv,
 152                                 shortopt, long_options,
 153                                 &option_index)) != -1) {
 154                 int newmode = mode;
 155                 /* firstly, some mode-independent options */
 156                 switch(opt) {
 157                 case HelpOptions:
 158                         print_help = 2;
 159                         continue;
 160                 case 'h':
 161                         print_help = 1;
 162                         continue;
 163
 164                 case 'V':
 165                         fputs(Version, stderr);
 166                         exit(0);
 167
 168                 case 'v': verbose++;
 169                         continue;
 170
 171                 case 'q': quiet++;
 172                         continue;
 173
 174                 case 'b':
 175                         if (mode == ASSEMBLE || mode == BUILD || mode == CREATE
 176                             || mode == GROW || mode == INCREMENTAL
 177                             || mode == MANAGE)
 178                                 break; /* b means bitmap */
 179                 case Brief:
 180                         brief = 1;
 181                         continue;
 182
 183                 case 'Y': export++;
 184                         continue;
 185
 186                 case HomeHost:
 187                         if (strcasecmp(optarg, "<ignore>") == 0)
 188                                 require_homehost = 0;
 189                         else
 190                                 homehost = optarg;
 191                         continue;
 192
 193                 /*
 194                  * --offroot sets first char of argv[0] to @. This is used
 195                  * by systemd to signal that the task was launched from
 196                  * initrd/initramfs and should be preserved during shutdown
 197                  */
 198                 case OffRootOpt:
 199                         argv[0][0] = '@';
 200                         __offroot = 1;
 201                         continue;
 202
 203                 case Prefer:
 204                         if (prefer)
 205                                 free(prefer);
 206                         if (asprintf(&prefer, "/%s/", optarg) <= 0)
 207                                 prefer = NULL;
 208                         continue;
 209
 210                 case ':':
 211                 case '?':
 212                         fputs(Usage, stderr);
 213                         exit(2);
 214                 }
 215                 /* second, figure out the mode.
 216                  * Some options force the mode.  Others
 217                  * set the mode if it isn't already
 218                  */
 219
 220                 switch(opt) {
 221                 case ManageOpt:
 222                         newmode = MANAGE;
 223                         shortopt = short_bitmap_options;
 224                         break;
 225                 case 'a':
 226                 case Add:
 227                 case 'r':
 228                 case Remove:
 229                 case 'f':
 230                 case Fail:
 231                 case ReAdd: /* re-add */
 232                         if (!mode) {
 233                                 newmode = MANAGE;
 234                                 shortopt = short_bitmap_options;
 235                         }
 236                         break;
 237
 238                 case 'A': newmode = ASSEMBLE;
 239                         shortopt = short_bitmap_auto_options;
 240                         break;
 241                 case 'B': newmode = BUILD;
 242                         shortopt = short_bitmap_auto_options;
 243                         break;
 244                 case 'C': newmode = CREATE;
 245                         shortopt = short_bitmap_auto_options;
 246                         break;
 247                 case 'F': newmode = MONITOR;
 248                         break;
 249                 case 'G': newmode = GROW;
 250                         shortopt = short_bitmap_options;
 251                         break;
 252                 case 'I': newmode = INCREMENTAL;
 253                         shortopt = short_bitmap_auto_options;
 254                         break;
 255                 case AutoDetect:
 256                         newmode = AUTODETECT;
 257                         break;
 258
 259                 case MiscOpt:
 260                 case 'D':
 261                 case 'E':
 262                 case 'X':
 263                 case 'Q':
 264                         newmode = MISC;
 265                         break;
 266
 267                 case 'R':
 268                 case 'S':
 269                 case 'o':
 270                 case 'w':
 271                 case 'W':
 272                 case WaitOpt:
 273                 case Waitclean:
 274                 case DetailPlatform:
 275                 case KillSubarray:
 276                 case UpdateSubarray:
 277                 case UdevRules:
 278                 case KillOpt:
 279                         if (!mode)
 280                                 newmode = MISC;
 281                         break;
 282
 283                 case NoSharing:
 284                         newmode = MONITOR;
 285                         break;
 286                 }
 287                 if (mode && newmode == mode) {
 288                         /* everybody happy ! */
 289                 } else if (mode && newmode != mode) {
 290                         /* not allowed.. */
 291                         pr_err("");
 292                         if (option_index >= 0)
 293                                 fprintf(stderr, "--%s", long_options[option_index].name);
 294                         else
 295                                 fprintf(stderr, "-%c", opt);
 296                         fprintf(stderr, " would set mdadm mode to \"%s\", but it is already set to \"%s\".\n",
 297                                 map_num(modes, newmode),
 298                                 map_num(modes, mode));
 299                         exit(2);
 300                 } else if (!mode && newmode) {
 301                         mode = newmode;
 302                         if (mode == MISC && devs_found) {
 303                                 pr_err("No action given for %s in --misc mode\n",
 304                                         devlist->devname);
 305                                 fprintf(stderr,"       Action options must come before device names\n");
 306                                 exit(2);
 307                         }
 308                 } else {
 309                         /* special case of -c --help */
 310                         if ((opt == 'c' || opt == ConfigFile) &&
 311                             ( strncmp(optarg, "--h", 3)==0 ||
 312                               strncmp(optarg, "-h", 2)==0)) {
 313                                 fputs(Help_config, stdout);
 314                                 exit(0);
 315                         }
 316
 317                         /* If first option is a device, don't force the mode yet */
 318                         if (opt == 1) {
 319                                 if (devs_found == 0) {
 320                                         dv = xmalloc(sizeof(*dv));
 321                                         dv->devname = optarg;
 322                                         dv->disposition = devmode;
 323                                         dv->writemostly = writemostly;
 324                                         dv->used = 0;
 325                                         dv->next = NULL;
 326                                         *devlistend = dv;
 327                                         devlistend = &dv->next;
 328
 329                                         devs_found++;
 330                                         continue;
 331                                 }
 332                                 /* No mode yet, and this is the second device ... */
 333                                 pr_err("An option must be given to set the mode before a second device\n"
 334                                         "       (%s) is listed\n", optarg);
 335                                 exit(2);
 336                         }
 337                         if (option_index >= 0)
 338                                 pr_err("--%s", long_options[option_index].name);
 339                         else
 340                                 pr_err("-%c", opt);
 341                         fprintf(stderr, " does not set the mode, and so cannot be the first option.\n");
 342                         exit(2);
 343                 }
 344
 345                 /* if we just set the mode, then done */
 346                 switch(opt) {
 347                 case ManageOpt:
 348                 case MiscOpt:
 349                 case 'A':
 350                 case 'B':
 351                 case 'C':
 352                 case 'F':
 353                 case 'G':
 354                 case 'I':
 355                 case AutoDetect:
 356                         continue;
 357                 }
 358                 if (opt == 1) {
 359                         /* an undecorated option - must be a device name.
 360                          */
 361                         if (devs_found > 0 && mode == MANAGE && !devmode) {
 362                                 pr_err("Must give one of -a/-r/-f"
 363                                         " for subsequent devices at %s\n", optarg);
 364                                 exit(2);
 365                         }
 366                         if (devs_found > 0 && mode == GROW && !devmode) {
 367                                 pr_err("Must give -a/--add for"
 368                                        " devices to add: %s\n", optarg);
 369                                 exit(2);
 370                         }
 371                         dv = xmalloc(sizeof(*dv));
 372                         dv->devname = optarg;
 373                         dv->disposition = devmode;
 374                         dv->writemostly = writemostly;
 375                         dv->used = 0;
 376                         dv->next = NULL;
 377                         *devlistend = dv;
 378                         devlistend = &dv->next;
 379
 380                         devs_found++;
 381                         continue;
 382                 }
 383
 384                 /* We've got a mode, and opt is now something else which
 385                  * could depend on the mode */
 386 #define O(a,b) ((a<<16)|b)
 387                 switch (O(mode,opt)) {
 388                 case O(GROW,'c'):
 389                 case O(GROW,ChunkSize):
 390                 case O(CREATE,'c'):
 391                 case O(CREATE,ChunkSize):
 392                 case O(BUILD,'c'): /* chunk or rounding */
 393                 case O(BUILD,ChunkSize): /* chunk or rounding */
 394                         if (chunk) {
 395                                 pr_err("chunk/rounding may only be specified once. "
 396                                         "Second value is %s.\n", optarg);
 397                                 exit(2);
 398                         }
 399                         chunk = parse_size(optarg);
 400                         if (chunk < 8 || (chunk&1)) {
 401                                 pr_err("invalid chunk/rounding value: %s\n",
 402                                         optarg);
 403                                 exit(2);
 404                         }
 405                         /* Convert sectors to K */
 406                         chunk /= 2;
 407                         continue;
 408
 409                 case O(INCREMENTAL, 'e'):
 410                 case O(CREATE,'e'):
 411                 case O(ASSEMBLE,'e'):
 412                 case O(MISC,'e'): /* set metadata (superblock) information */
 413                         if (ss) {
 414                                 pr_err("metadata information already given\n");
 415                                 exit(2);
 416                         }
 417                         for(i=0; !ss && superlist[i]; i++)
 418                                 ss = superlist[i]->match_metadata_desc(optarg);
 419
 420                         if (!ss) {
 421                                 pr_err("unrecognised metadata identifier: %s\n", optarg);
 422                                 exit(2);
 423                         }
 424                         continue;
 425
 426                 case O(MANAGE,'W'):
 427                 case O(MANAGE,WriteMostly):
 428                 case O(BUILD,'W'):
 429                 case O(BUILD,WriteMostly):
 430                 case O(CREATE,'W'):
 431                 case O(CREATE,WriteMostly):
 432                         /* set write-mostly for following devices */
 433                         writemostly = 1;
 434                         continue;
 435
 436                 case O(MANAGE,'w'):
 437                         /* clear write-mostly for following devices */
 438                         writemostly = 2;
 439                         continue;
 440
 441
 442                 case O(GROW,'z'):
 443                 case O(CREATE,'z'):
 444                 case O(BUILD,'z'): /* size */
 445                         if (size >= 0) {
 446                                 pr_err("size may only be specified once. "
 447                                         "Second value is %s.\n", optarg);
 448                                 exit(2);
 449                         }
 450                         if (strcmp(optarg, "max")==0)
 451                                 size = 0;
 452                         else {
 453                                 size = parse_size(optarg);
 454                                 if (size < 8) {
 455                                         pr_err("invalid size: %s\n",
 456                                                 optarg);
 457                                         exit(2);
 458                                 }
 459                                 /* convert sectors to K */
 460                                 size /= 2;
 461                         }
 462                         continue;
 463
 464                 case O(GROW,'Z'): /* array size */
 465                         if (array_size >= 0) {
 466                                 pr_err("array-size may only be specified once. "
 467                                         "Second value is %s.\n", optarg);
 468                                 exit(2);
 469                         }
 470                         if (strcmp(optarg, "max") == 0)
 471                                 array_size = 0;
 472                         else {
 473                                 array_size = parse_size(optarg);
 474                                 if (array_size <= 0) {
 475                                         pr_err("invalid array size: %s\n",
 476                                                 optarg);
 477                                         exit(2);
 478                                 }
 479                         }
 480                         continue;
 481
 482                 case O(GROW,'l'):
 483                 case O(CREATE,'l'):
 484                 case O(BUILD,'l'): /* set raid level*/
 485                         if (level != UnSet) {
 486                                 pr_err("raid level may only be set once.  "
 487                                         "Second value is %s.\n", optarg);
 488                                 exit(2);
 489                         }
 490                         level = map_name(pers, optarg);
 491                         if (level == UnSet) {
 492                                 pr_err("invalid raid level: %s\n",
 493                                         optarg);
 494                                 exit(2);
 495                         }
 496                         if (level != 0 && level != LEVEL_LINEAR && level != 1 &&
 497                             level != LEVEL_MULTIPATH && level != LEVEL_FAULTY &&
 498                             level != 10 &&
 499                             mode == BUILD) {
 500                                 pr_err("Raid level %s not permitted with --build.\n",
 501                                         optarg);
 502                                 exit(2);
 503                         }
 504                         if (sparedisks > 0 && level < 1 && level >= -1) {
 505                                 pr_err("raid level %s is incompatible with spare-devices setting.\n",
 506                                         optarg);
 507                                 exit(2);
 508                         }
 509                         ident.level = level;
 510                         continue;
 511
 512                 case O(GROW, 'p'): /* new layout */
 513                 case O(GROW, Layout):
 514                         if (layout_str) {
 515                                 pr_err("layout may only be sent once.  "
 516                                        "Second value was %s\n", optarg);
 517                                 exit(2);
 518                         }
 519                         layout_str = optarg;
 520                         /* 'Grow' will parse the value */
 521                         continue;
 522
 523                 case O(CREATE,'p'): /* raid5 layout */
 524                 case O(CREATE,Layout):
 525                 case O(BUILD,'p'): /* faulty layout */
 526                 case O(BUILD,Layout):
 527                         if (layout != UnSet) {
 528                                 pr_err("layout may only be sent once.  "
 529                                        "Second value was %s\n", optarg);
 530                                 exit(2);
 531                         }
 532                         switch(level) {
 533                         default:
 534                                 pr_err("layout not meaningful for %s arrays.\n",
 535                                         map_num(pers, level));
 536                                 exit(2);
 537                         case UnSet:
 538                                 pr_err("raid level must be given before layout.\n");
 539                                 exit(2);
 540
 541                         case 5:
 542                                 layout = map_name(r5layout, optarg);
 543                                 if (layout==UnSet) {
 544                                         pr_err("layout %s not understood for raid5.\n",
 545                                                 optarg);
 546                                         exit(2);
 547                                 }
 548                                 break;
 549                         case 6:
 550                                 layout = map_name(r6layout, optarg);
 551                                 if (layout==UnSet) {
 552                                         pr_err("layout %s not understood for raid6.\n",
 553                                                 optarg);
 554                                         exit(2);
 555                                 }
 556                                 break;
 557
 558                         case 10:
 559                                 layout = parse_layout_10(optarg);
 560                                 if (layout < 0) {
 561                                         pr_err("layout for raid10 must be 'nNN', 'oNN' or 'fNN' where NN is a number, not %s\n", optarg);
 562                                         exit(2);
 563                                 }
 564                                 break;
 565                         case LEVEL_FAULTY:
 566                                 /* Faulty
 567                                  * modeNNN
 568                                  */
 569                                 layout = parse_layout_faulty(optarg);
 570                                 if (layout == -1) {
 571                                         pr_err("layout %s not understood for faulty.\n",
 572                                                 optarg);
 573                                         exit(2);
 574                                 }
 575                                 break;
 576                         }
 577                         continue;
 578
 579                 case O(CREATE,AssumeClean):
 580                 case O(BUILD,AssumeClean): /* assume clean */
 581                 case O(GROW,AssumeClean):
 582                         assume_clean = 1;
 583                         continue;
 584
 585                 case O(GROW,'n'):
 586                 case O(CREATE,'n'):
 587                 case O(BUILD,'n'): /* number of raid disks */
 588                         if (raiddisks) {
 589                                 pr_err("raid-devices set twice: %d and %s\n",
 590                                         raiddisks, optarg);
 591                                 exit(2);
 592                         }
 593                         raiddisks = strtol(optarg, &c, 10);
 594                         if (!optarg[0] || *c || raiddisks<=0) {
 595                                 pr_err("invalid number of raid devices: %s\n",
 596                                         optarg);
 597                                 exit(2);
 598                         }
 599                         ident.raid_disks = raiddisks;
 600                         continue;
 601
 602                 case O(CREATE,'x'): /* number of spare (eXtra) disks */
 603                         if (sparedisks) {
 604                                 pr_err("spare-devices set twice: %d and %s\n",
 605                                        sparedisks, optarg);
 606                                 exit(2);
 607                         }
 608                         if (level != UnSet && level <= 0 && level >= -1) {
 609                                 pr_err("spare-devices setting is incompatible with raid level %d\n",
 610                                         level);
 611                                 exit(2);
 612                         }
 613                         sparedisks = strtol(optarg, &c, 10);
 614                         if (!optarg[0] || *c || sparedisks < 0) {
 615                                 pr_err("invalid number of spare-devices: %s\n",
 616                                         optarg);
 617                                 exit(2);
 618                         }
 619                         continue;
 620
 621                 case O(CREATE,'a'):
 622                 case O(CREATE,Auto):
 623                 case O(BUILD,'a'):
 624                 case O(BUILD,Auto):
 625                 case O(INCREMENTAL,'a'):
 626                 case O(INCREMENTAL,Auto):
 627                 case O(ASSEMBLE,'a'):
 628                 case O(ASSEMBLE,Auto): /* auto-creation of device node */
 629                         autof = parse_auto(optarg, "--auto flag", 0);
 630                         continue;
 631
 632                 case O(CREATE,Symlinks):
 633                 case O(BUILD,Symlinks):
 634                 case O(ASSEMBLE,Symlinks): /* auto creation of symlinks in /dev to /dev/md */
 635                         symlinks = optarg;
 636                         continue;
 637
 638                 case O(BUILD,'f'): /* force honouring '-n 1' */
 639                 case O(BUILD,Force): /* force honouring '-n 1' */
 640                 case O(GROW,'f'): /* ditto */
 641                 case O(GROW,Force): /* ditto */
 642                 case O(CREATE,'f'): /* force honouring of device list */
 643                 case O(CREATE,Force): /* force honouring of device list */
 644                 case O(ASSEMBLE,'f'): /* force assembly */
 645                 case O(ASSEMBLE,Force): /* force assembly */
 646                 case O(MISC,'f'): /* force zero */
 647                 case O(MISC,Force): /* force zero */
 648                 case O(MANAGE,Force): /* add device which is too large */
 649                         force=1;
 650                         continue;
 651                         /* now for the Assemble options */
 652                 case O(ASSEMBLE, FreezeReshape):   /* Freeze reshape during
 653                                                     * initrd phase */
 654                 case O(INCREMENTAL, FreezeReshape):
 655                         freeze_reshape = 1;
 656                         continue;
 657                 case O(CREATE,'u'): /* uuid of array */
 658                 case O(ASSEMBLE,'u'): /* uuid of array */
 659                         if (ident.uuid_set) {
 660                                 pr_err("uuid cannot be set twice.  "
 661                                         "Second value %s.\n", optarg);
 662                                 exit(2);
 663                         }
 664                         if (parse_uuid(optarg, ident.uuid))
 665                                 ident.uuid_set = 1;
 666                         else {
 667                                 pr_err("Bad uuid: %s\n", optarg);
 668                                 exit(2);
 669                         }
 670                         continue;
 671
 672                 case O(CREATE,'N'):
 673                 case O(ASSEMBLE,'N'):
 674                 case O(MISC,'N'):
 675                         if (ident.name[0]) {
 676                                 pr_err("name cannot be set twice.   "
 677                                         "Second value %s.\n", optarg);
 678                                 exit(2);
 679                         }
 680                         if (mode == MISC && !subarray) {
 681                                 pr_err("-N/--name only valid with --update-subarray in misc mode\n");
 682                                 exit(2);
 683                         }
 684                         if (strlen(optarg) > 32) {
 685                                 pr_err("name '%s' is too long, 32 chars max.\n",
 686                                         optarg);
 687                                 exit(2);
 688                         }
 689                         strcpy(ident.name, optarg);
 690                         continue;
 691
 692                 case O(ASSEMBLE,'m'): /* super-minor for array */
 693                 case O(ASSEMBLE,SuperMinor):
 694                         if (ident.super_minor != UnSet) {
 695                                 pr_err("super-minor cannot be set twice.  "
 696                                         "Second value: %s.\n", optarg);
 697                                 exit(2);
 698                         }
 699                         if (strcmp(optarg, "dev")==0)
 700                                 ident.super_minor = -2;
 701                         else {
 702                                 ident.super_minor = strtoul(optarg, &cp, 10);
 703                                 if (!optarg[0] || *cp) {
 704                                         pr_err("Bad super-minor number: %s.\n", optarg);
 705                                         exit(2);
 706                                 }
 707                         }
 708                         continue;
 709
 710                 case O(ASSEMBLE,'o'):
 711                 case O(MANAGE,'o'):
 712                 case O(CREATE,'o'):
 713                         readonly = 1;
 714                         continue;
 715
 716                 case O(ASSEMBLE,'U'): /* update the superblock */
 717                 case O(MISC,'U'):
 718                         if (update) {
 719                                 pr_err("Can only update one aspect"
 720                                         " of superblock, both %s and %s given.\n",
 721                                         update, optarg);
 722                                 exit(2);
 723                         }
 724                         if (mode == MISC && !subarray) {
 725                                 pr_err("Only subarrays can be"
 726                                         " updated in misc mode\n");
 727                                 exit(2);
 728                         }
 729                         update = optarg;
 730                         if (strcmp(update, "sparc2.2")==0)
 731                                 continue;
 732                         if (strcmp(update, "super-minor") == 0)
 733                                 continue;
 734                         if (strcmp(update, "summaries")==0)
 735                                 continue;
 736                         if (strcmp(update, "resync")==0)
 737                                 continue;
 738                         if (strcmp(update, "uuid")==0)
 739                                 continue;
 740                         if (strcmp(update, "name")==0)
 741                                 continue;
 742                         if (strcmp(update, "homehost")==0)
 743                                 continue;
 744                         if (strcmp(update, "devicesize")==0)
 745                                 continue;
 746                         if (strcmp(update, "no-bitmap")==0)
 747                                 continue;
 748                         if (strcmp(update, "byteorder")==0) {
 749                                 if (ss) {
 750                                         pr_err("must not set metadata"
 751                                                " type with --update=byteorder.\n");
 752                                         exit(2);
 753                                 }
 754                                 for(i=0; !ss && superlist[i]; i++)
 755                                         ss = superlist[i]->match_metadata_desc(
 756                                                 "0.swap");
 757                                 if (!ss) {
 758                                         pr_err("INTERNAL ERROR"
 759                                                 " cannot find 0.swap\n");
 760                                         exit(2);
 761                                 }
 762
 763                                 continue;
 764                         }
 765                         if (strcmp(update,"?") == 0 ||
 766                             strcmp(update, "help") == 0) {
 767                                 outf = stdout;
 768                                 fprintf(outf, Name ": ");
 769                         } else {
 770                                 outf = stderr;
 771                                 fprintf(outf,
 772                                         Name ": '--update=%s' is invalid.  ",
 773                                         update);
 774                         }
 775                         fprintf(outf, "Valid --update options are:\n"
 776                 "     'sparc2.2', 'super-minor', 'uuid', 'name', 'resync',\n"
 777                 "     'summaries', 'homehost', 'byteorder', 'devicesize',\n"
 778                 "     'no-bitmap'\n");
 779                         exit(outf == stdout ? 0 : 2);
 780
 781                 case O(MANAGE,'U'):
 782                         /* update=devicesize is allowed with --re-add */
 783                         if (devmode != 'A') {
 784                                 pr_err("--update in Manage mode only"
 785                                         " allowed with --re-add.\n");
 786                                 exit(1);
 787                         }
 788                         if (update) {
 789                                 pr_err("Can only update one aspect"
 790                                         " of superblock, both %s and %s given.\n",
 791                                         update, optarg);
 792                                 exit(2);
 793                         }
 794                         update = optarg;
 795                         if (strcmp(update, "devicesize") != 0) {
 796                                 pr_err("only 'devicesize' can be"
 797                                         " updated with --re-add\n");
 798                                 exit(2);
 799                         }
 800                         continue;
 801
 802                 case O(INCREMENTAL,NoDegraded):
 803                         pr_err("--no-degraded is deprecated in Incremental mode\n");
 804                 case O(ASSEMBLE,NoDegraded): /* --no-degraded */
 805                         runstop = -1; /* --stop isn't allowed for --assemble,
 806                                        * so we overload slightly */
 807                         continue;
 808
 809                 case O(ASSEMBLE,'c'):
 810                 case O(ASSEMBLE,ConfigFile):
 811                 case O(INCREMENTAL, 'c'):
 812                 case O(INCREMENTAL, ConfigFile):
 813                 case O(MISC, 'c'):
 814                 case O(MISC, ConfigFile):
 815                 case O(MONITOR,'c'):
 816                 case O(MONITOR,ConfigFile):
 817                         if (configfile) {
 818                                 pr_err("configfile cannot be set twice.  "
 819                                         "Second value is %s.\n", optarg);
 820                                 exit(2);
 821                         }
 822                         configfile = optarg;
 823                         set_conffile(configfile);
 824                         /* FIXME possibly check that config file exists.  Even parse it */
 825                         continue;
 826                 case O(ASSEMBLE,'s'): /* scan */
 827                 case O(MISC,'s'):
 828                 case O(MONITOR,'s'):
 829                 case O(INCREMENTAL,'s'):
 830                         scan = 1;
 831                         continue;
 832
 833                 case O(MONITOR,'m'): /* mail address */
 834                 case O(MONITOR,EMail):
 835                         if (mailaddr)
 836                                 pr_err("only specify one mailaddress. %s ignored.\n",
 837                                         optarg);
 838                         else
 839                                 mailaddr = optarg;
 840                         continue;
 841
 842                 case O(MONITOR,'p'): /* alert program */
 843                 case O(MONITOR,ProgramOpt): /* alert program */
 844                         if (program)
 845                                 pr_err("only specify one alter program. %s ignored.\n",
 846                                         optarg);
 847                         else
 848                                 program = optarg;
 849                         continue;
 850
 851                 case O(MONITOR,'r'): /* rebuild increments */
 852                 case O(MONITOR,Increment):
 853                         increments = atoi(optarg);
 854                         if (increments > 99 || increments < 1) {
 855                                 pr_err("please specify positive integer between 1 and 99 as rebuild increments.\n");
 856                                 exit(2);
 857                         }
 858                         continue;
 859
 860                 case O(MONITOR,'d'): /* delay in seconds */
 861                 case O(GROW, 'd'):
 862                 case O(BUILD,'d'): /* delay for bitmap updates */
 863                 case O(CREATE,'d'):
 864                         if (delay)
 865                                 pr_err("only specify delay once. %s ignored.\n",
 866                                         optarg);
 867                         else {
 868                                 delay = strtol(optarg, &c, 10);
 869                                 if (!optarg[0] || *c || delay<1) {
 870                                         pr_err("invalid delay: %s\n",
 871                                                 optarg);
 872                                         exit(2);
 873                                 }
 874                         }
 875                         continue;
 876                 case O(MONITOR,'f'): /* daemonise */
 877                 case O(MONITOR,Fork):
 878                         daemonise = 1;
 879                         continue;
 880                 case O(MONITOR,'i'): /* pid */
 881                         if (pidfile)
 882                                 pr_err("only specify one pid file. %s ignored.\n",
 883                                         optarg);
 884                         else
 885                                 pidfile = optarg;
 886                         continue;
 887                 case O(MONITOR,'1'): /* oneshot */
 888                         oneshot = 1;
 889                         spare_sharing = 0;
 890                         continue;
 891                 case O(MONITOR,'t'): /* test */
 892                         test = 1;
 893                         continue;
 894                 case O(MONITOR,'y'): /* log messages to syslog */
 895                         openlog("mdadm", LOG_PID, SYSLOG_FACILITY);
 896                         dosyslog = 1;
 897                         continue;
 898                 case O(MONITOR, NoSharing):
 899                         spare_sharing = 0;
 900                         continue;
 901
 902                         /* now the general management options.  Some are applicable
 903                          * to other modes. None have arguments.
 904                          */
 905                 case O(GROW,'a'):
 906                 case O(GROW,Add):
 907                 case O(MANAGE,'a'):
 908                 case O(MANAGE,Add): /* add a drive */
 909                         devmode = 'a';
 910                         continue;
 911                 case O(MANAGE,ReAdd):
 912                         devmode = 'A';
 913                         continue;
 914                 case O(MANAGE,'r'): /* remove a drive */
 915                 case O(MANAGE,Remove):
 916                         devmode = 'r';
 917                         continue;
 918                 case O(MANAGE,'f'): /* set faulty */
 919                 case O(MANAGE,Fail):
 920                 case O(INCREMENTAL,'f'):
 921                 case O(INCREMENTAL,Remove):
 922                 case O(INCREMENTAL,Fail): /* r for incremental is taken, use f
 923                                            * even though we will both fail and
 924                                            * remove the device */
 925                         devmode = 'f';
 926                         continue;
 927                 case O(INCREMENTAL,'R'):
 928                 case O(MANAGE,'R'):
 929                 case O(ASSEMBLE,'R'):
 930                 case O(BUILD,'R'):
 931                 case O(CREATE,'R'): /* Run the array */
 932                         if (runstop < 0) {
 933                                 pr_err("Cannot both Stop and Run an array\n");
 934                                 exit(2);
 935                         }
 936                         runstop = 1;
 937                         continue;
 938                 case O(MANAGE,'S'):
 939                         if (runstop > 0) {
 940                                 pr_err("Cannot both Run and Stop an array\n");
 941                                 exit(2);
 942                         }
 943                         runstop = -1;
 944                         continue;
 945                 case O(MANAGE,'t'):
 946                         test = 1;
 947                         continue;
 948
 949                 case O(MISC,'Q'):
 950                 case O(MISC,'D'):
 951                 case O(MISC,'E'):
 952                 case O(MISC,KillOpt):
 953                 case O(MISC,'R'):
 954                 case O(MISC,'S'):
 955                 case O(MISC,'X'):
 956                 case O(MISC,'o'):
 957                 case O(MISC,'w'):
 958                 case O(MISC,'W'):
 959                 case O(MISC, WaitOpt):
 960                 case O(MISC, Waitclean):
 961                 case O(MISC, DetailPlatform):
 962                 case O(MISC, KillSubarray):
 963                 case O(MISC, UpdateSubarray):
 964                         if (opt == KillSubarray || opt == UpdateSubarray) {
 965                                 if (subarray) {
 966                                         pr_err("subarray can only"
 967                                                 " be specified once\n");
 968                                         exit(2);
 969                                 }
 970                                 subarray = optarg;
 971                         }
 972                         if (devmode && devmode != opt &&
 973                             (devmode == 'E' || (opt == 'E' && devmode != 'Q'))) {
 974                                 pr_err("--examine/-E cannot be given with ");
 975                                 if (devmode == 'E') {
 976                                         if (option_index >= 0)
 977                                                 fprintf(stderr, "--%s\n",
 978                                                         long_options[option_index].name);
 979                                         else
 980                                                 fprintf(stderr, "-%c\n", opt);
 981                                 } else if (isalpha(devmode))
 982                                         fprintf(stderr, "-%c\n", devmode);
 983                                 else
 984                                         fprintf(stderr, "previous option\n");
 985                                 exit(2);
 986                         }
 987                         devmode = opt;
 988                         continue;
 989                 case O(MISC, UdevRules):
 990                         if (devmode && devmode != opt) {
 991                                 pr_err("--udev-rules must"
 992                                        " be the only option.\n");
 993                         } else {
 994                                 if (udev_filename)
 995                                         pr_err("only specify one udev "
 996                                                 "rule filename. %s ignored.\n",
 997                                                 optarg);
 998                                 else
 999                                         udev_filename = optarg;
1000                         }
1001                         devmode = opt;
1002                         continue;
1003                 case O(MISC,'t'):
1004                         test = 1;
1005                         continue;
1006
1007                 case O(MISC, Sparc22):
1008                         if (devmode != 'E') {
1009                                 pr_err("--sparc2.2 only allowed with --examine\n");
1010                                 exit(2);
1011                         }
1012                         SparcAdjust = 1;
1013                         continue;
1014
1015                 case O(ASSEMBLE,'b'): /* here we simply set the bitmap file */
1016                 case O(ASSEMBLE,Bitmap):
1017                         if (!optarg) {
1018                                 pr_err("bitmap file needed with -b in --assemble mode\n");
1019                                 exit(2);
1020                         }
1021                         if (strcmp(optarg, "internal")==0) {
1022                                 pr_err("there is no need to specify --bitmap when assembling arrays with internal bitmaps\n");
1023                                 continue;
1024                         }
1025                         bitmap_fd = open(optarg, O_RDWR);
1026                         if (!*optarg || bitmap_fd < 0) {
1027                                 pr_err("cannot open bitmap file %s: %s\n", optarg, strerror(errno));
1028                                 exit(2);
1029                         }
1030                         ident.bitmap_fd = bitmap_fd; /* for Assemble */
1031                         continue;
1032
1033                 case O(ASSEMBLE, BackupFile):
1034                 case O(GROW, BackupFile):
1035                         /* Specify a file into which grow might place a backup,
1036                          * or from which assemble might recover a backup
1037                          */
1038                         if (backup_file) {
1039                                 pr_err("backup file already specified, rejecting %s\n", optarg);
1040                                 exit(2);
1041                         }
1042                         backup_file = optarg;
1043                         continue;
1044
1045                 case O(GROW, Continue):
1046                         /* Continue interrupted grow
1047                          */
1048                         grow_continue = 1;
1049                         continue;
1050                 case O(ASSEMBLE, InvalidBackup):
1051                         /* Acknowledge that the backupfile is invalid, but ask
1052                          * to continue anyway
1053                          */
1054                         invalid_backup = 1;
1055                         continue;
1056
1057                 case O(BUILD,'b'):
1058                 case O(BUILD,Bitmap):
1059                 case O(CREATE,'b'):
1060                 case O(CREATE,Bitmap): /* here we create the bitmap */
1061                         if (strcmp(optarg, "none") == 0) {
1062                                 pr_err("'--bitmap none' only"
1063                                         " supported for --grow\n");
1064                                 exit(2);
1065                         }
1066                         /* FALL THROUGH */
1067                 case O(GROW,'b'):
1068                 case O(GROW,Bitmap):
1069                         if (strcmp(optarg, "internal")== 0 ||
1070                             strcmp(optarg, "none")== 0 ||
1071                             strchr(optarg, '/') != NULL) {
1072                                 bitmap_file = optarg;
1073                                 continue;
1074                         }
1075                         /* probable typo */
1076                         pr_err("bitmap file must contain a '/', or be 'internal', or 'none'\n"
1077                                 "       not '%s'\n", optarg);
1078                         exit(2);
1079
1080                 case O(GROW,BitmapChunk):
1081                 case O(BUILD,BitmapChunk):
1082                 case O(CREATE,BitmapChunk): /* bitmap chunksize */
1083                         bitmap_chunk = parse_size(optarg);
1084                         if (bitmap_chunk <= 0 ||
1085                             bitmap_chunk & (bitmap_chunk - 1)) {
1086                                 pr_err("invalid bitmap chunksize: %s\n",
1087                                        optarg);
1088                                 exit(2);
1089                         }
1090                         bitmap_chunk = bitmap_chunk * 512;
1091                         continue;
1092
1093                 case O(GROW, WriteBehind):
1094                 case O(BUILD, WriteBehind):
1095                 case O(CREATE, WriteBehind): /* write-behind mode */
1096                         write_behind = DEFAULT_MAX_WRITE_BEHIND;
1097                         if (optarg) {
1098                                 write_behind = strtol(optarg, &c, 10);
1099                                 if (write_behind < 0 || *c ||
1100                                     write_behind > 16383) {
1101                                         pr_err("Invalid value for maximum outstanding write-behind writes: %s.\n\tMust be between 0 and 16383.\n", optarg);
1102                                         exit(2);
1103                                 }
1104                         }
1105                         continue;
1106
1107                 case O(INCREMENTAL, 'r'):
1108                 case O(INCREMENTAL, RebuildMapOpt):
1109                         rebuild_map = 1;
1110                         continue;
1111                 case O(INCREMENTAL, IncrementalPath):
1112                         remove_path = optarg;
1113                         continue;
1114                 }
1115                 /* We have now processed all the valid options. Anything else is
1116                  * an error
1117                  */
1118                 if (option_index > 0)
1119                         pr_err(":option --%s not valid in %s mode\n",
1120                                 long_options[option_index].name,
1121                                 map_num(modes, mode));
1122                 else
1123                         pr_err("option -%c not valid in %s mode\n",
1124                                 opt, map_num(modes, mode));
1125                 exit(2);
1126
1127         }
1128
1129         if (print_help) {
1130                 char *help_text;
1131                 if (print_help == 2)
1132                         help_text = OptionHelp;
1133                 else
1134                         help_text = mode_help[mode];
1135                 if (help_text == NULL)
1136                         help_text = Help;
1137                 fputs(help_text,stdout);
1138                 exit(0);
1139         }
1140
1141         if (!mode && devs_found) {
1142                 mode = MISC;
1143                 devmode = 'Q';
1144                 if (devlist->disposition == 0)
1145                         devlist->disposition = devmode;
1146         }
1147         if (!mode) {
1148                 fputs(Usage, stderr);
1149                 exit(2);
1150         }
1151
1152         if (symlinks) {
1153                 struct createinfo *ci = conf_get_create_info();
1154
1155                 if (strcasecmp(symlinks, "yes") == 0)
1156                         ci->symlinks = 1;
1157                 else if (strcasecmp(symlinks, "no") == 0)
1158                         ci->symlinks = 0;
1159                 else {
1160                         pr_err("option --symlinks must be 'no' or 'yes'\n");
1161                         exit(2);
1162                 }
1163         }
1164         /* Ok, got the option parsing out of the way
1165          * hopefully it's mostly right but there might be some stuff
1166          * missing
1167          *
1168          * That is mosty checked in the per-mode stuff but...
1169          *
1170          * For @,B,C and A without -s, the first device listed must be
1171          * an md device.  We check that here and open it.
1172          */
1173
1174         if (mode == MANAGE || mode == BUILD || mode == CREATE
1175             || mode == GROW
1176             || (mode == ASSEMBLE && ! scan)) {
1177                 if (devs_found < 1) {
1178                         pr_err("an md device must be given in this mode\n");
1179                         exit(2);
1180                 }
1181                 if ((int)ident.super_minor == -2 && autof) {
1182                         pr_err("--super-minor=dev is incompatible with --auto\n");
1183                         exit(2);
1184                 }
1185                 if (mode == MANAGE || mode == GROW) {
1186                         mdfd = open_mddev(devlist->devname, 1);
1187                         if (mdfd < 0)
1188                                 exit(1);
1189                 } else
1190                         /* non-existent device is OK */
1191                         mdfd = open_mddev(devlist->devname, 0);
1192                 if (mdfd == -2) {
1193                         pr_err("device %s exists but is not an "
1194                                 "md array.\n", devlist->devname);
1195                         exit(1);
1196                 }
1197                 if ((int)ident.super_minor == -2) {
1198                         struct stat stb;
1199                         if (mdfd < 0) {
1200                                 pr_err("--super-minor=dev given, and "
1201                                         "listed device %s doesn't exist.\n",
1202                                         devlist->devname);
1203                                 exit(1);
1204                         }
1205                         fstat(mdfd, &stb);
1206                         ident.super_minor = minor(stb.st_rdev);
1207                 }
1208                 if (mdfd >= 0 && mode != MANAGE && mode != GROW) {
1209                         /* We don't really want this open yet, we just might
1210                          * have wanted to check some things
1211                          */
1212                         close(mdfd);
1213                         mdfd = -1;
1214                 }
1215         }
1216
1217         if (raiddisks) {
1218                 if (raiddisks == 1 &&  !force && level != LEVEL_FAULTY) {
1219                         pr_err("'1' is an unusual number of drives for an array, so it is probably\n"
1220                                 "     a mistake.  If you really mean it you will need to specify --force before\n"
1221                                 "     setting the number of drives.\n");
1222                         exit(2);
1223                 }
1224         }
1225
1226         if (homehost == NULL)
1227                 homehost = conf_get_homehost(&require_homehost);
1228         if (homehost == NULL || strcasecmp(homehost, "<system>")==0) {
1229                 if (gethostname(sys_hostname, sizeof(sys_hostname)) == 0) {
1230                         sys_hostname[sizeof(sys_hostname)-1] = 0;
1231                         homehost = sys_hostname;
1232                 }
1233         }
1234         if (homehost && (!homehost[0] || strcasecmp(homehost, "<none>") == 0)) {
1235                 homehost = NULL;
1236                 require_homehost = 0;
1237         }
1238
1239         if ((mode == MISC && devmode == 'E')
1240             || (mode == MONITOR && spare_sharing == 0))
1241                 /* Anyone may try this */;
1242         else if (geteuid() != 0) {
1243                 pr_err("must be super-user to perform this action\n");
1244                 exit(1);
1245         }
1246
1247         ident.autof = autof;
1248
1249         rv = 0;
1250         switch(mode) {
1251         case MANAGE:
1252                 /* readonly, add/remove, readwrite, runstop */
1253                 if (readonly>0)
1254                         rv = Manage_ro(devlist->devname, mdfd, readonly);
1255                 if (!rv && devs_found>1)
1256                         rv = Manage_subdevs(devlist->devname, mdfd,
1257                                             devlist->next, verbose-quiet, test,
1258                                             update, force);
1259                 if (!rv && readonly < 0)
1260                         rv = Manage_ro(devlist->devname, mdfd, readonly);
1261                 if (!rv && runstop)
1262                         rv = Manage_runstop(devlist->devname, mdfd, runstop, quiet);
1263                 break;
1264         case ASSEMBLE:
1265                 if (devs_found == 1 && ident.uuid_set == 0 &&
1266                     ident.super_minor == UnSet && ident.name[0] == 0 && !scan ) {
1267                         /* Only a device has been given, so get details from config file */
1268                         struct mddev_ident *array_ident = conf_get_ident(devlist->devname);
1269                         if (array_ident == NULL) {
1270                                 pr_err("%s not identified in config file.\n",
1271                                         devlist->devname);
1272                                 rv |= 1;
1273                                 if (mdfd >= 0)
1274                                         close(mdfd);
1275                         } else {
1276                                 if (array_ident->autof == 0)
1277                                         array_ident->autof = autof;
1278                                 rv |= Assemble(ss, devlist->devname, array_ident,
1279                                                NULL, backup_file, invalid_backup,
1280                                                readonly, runstop, update,
1281                                                homehost, require_homehost,
1282                                                verbose-quiet, force,
1283                                                freeze_reshape);
1284                         }
1285                 } else if (!scan)
1286                         rv = Assemble(ss, devlist->devname, &ident,
1287                                       devlist->next, backup_file, invalid_backup,
1288                                       readonly, runstop, update,
1289                                       homehost, require_homehost,
1290                                       verbose-quiet, force,
1291                                       freeze_reshape);
1292                 else if (devs_found > 0) {
1293                         if (update && devs_found > 1) {
1294                                 pr_err("can only update a single array at a time\n");
1295                                 exit(1);
1296                         }
1297                         if (backup_file && devs_found > 1) {
1298                                 pr_err("can only assemble a single array when providing a backup file.\n");
1299                                 exit(1);
1300                         }
1301                         for (dv = devlist ; dv ; dv=dv->next) {
1302                                 struct mddev_ident *array_ident = conf_get_ident(dv->devname);
1303                                 if (array_ident == NULL) {
1304                                         pr_err("%s not identified in config file.\n",
1305                                                 dv->devname);
1306                                         rv |= 1;
1307                                         continue;
1308                                 }
1309                                 if (array_ident->autof == 0)
1310                                         array_ident->autof = autof;
1311                                 rv |= Assemble(ss, dv->devname, array_ident,
1312                                                NULL, backup_file, invalid_backup,
1313                                                readonly, runstop, update,
1314                                                homehost, require_homehost,
1315                                                verbose-quiet, force,
1316                                                freeze_reshape);
1317                         }
1318                 } else {
1319                         if (update) {
1320                                 pr_err("--update not meaningful with a --scan assembly.\n");
1321                                 exit(1);
1322                         }
1323                         if (backup_file) {
1324                                 pr_err("--backup_file not meaningful with a --scan assembly.\n");
1325                                 exit(1);
1326                         }
1327                         rv = scan_assemble(autof, ss, readonly, runstop,
1328                                            &ident, homehost,
1329                                            require_homehost,
1330                                            verbose - quiet,
1331                                            force, freeze_reshape);
1332                 }
1333
1334                 break;
1335         case BUILD:
1336                 if (delay == 0) delay = DEFAULT_BITMAP_DELAY;
1337                 if (write_behind && !bitmap_file) {
1338                         pr_err("write-behind mode requires a bitmap.\n");
1339                         rv = 1;
1340                         break;
1341                 }
1342                 if (raiddisks == 0) {
1343                         pr_err("no raid-devices specified.\n");
1344                         rv = 1;
1345                         break;
1346                 }
1347
1348                 if (bitmap_file) {
1349                         if (strcmp(bitmap_file, "internal")==0) {
1350                                 pr_err("'internal' bitmaps not supported with --build\n");
1351                                 rv |= 1;
1352                                 break;
1353                         }
1354                 }
1355                 rv = Build(devlist->devname, chunk, level, layout,
1356                            raiddisks, devlist->next, assume_clean,
1357                            bitmap_file, bitmap_chunk, write_behind,
1358                            delay, verbose-quiet, autof, size);
1359                 break;
1360         case CREATE:
1361                 if (delay == 0) delay = DEFAULT_BITMAP_DELAY;
1362                 if (write_behind && !bitmap_file) {
1363                         pr_err("write-behind mode requires a bitmap.\n");
1364                         rv = 1;
1365                         break;
1366                 }
1367                 if (raiddisks == 0) {
1368                         pr_err("no raid-devices specified.\n");
1369                         rv = 1;
1370                         break;
1371                 }
1372
1373                 rv = Create(ss, devlist->devname, chunk, level, layout, size<0 ? 0 : size,
1374                             raiddisks, sparedisks, ident.name, homehost,
1375                             ident.uuid_set ? ident.uuid : NULL,
1376                             devs_found-1, devlist->next, runstop,
1377                             readonly, verbose-quiet, force, assume_clean,
1378                             bitmap_file, bitmap_chunk, write_behind, delay, autof);
1379                 break;
1380         case MISC:
1381                 if (devmode == 'E') {
1382                         if (devlist == NULL && !scan) {
1383                                 pr_err("No devices to examine\n");
1384                                 exit(2);
1385                         }
1386                         if (devlist == NULL)
1387                                 devlist = conf_get_devs();
1388                         if (devlist == NULL) {
1389                                 pr_err("No devices listed in %s\n", configfile?configfile:DefaultConfFile);
1390                                 exit(1);
1391                         }
1392                         if (brief && verbose)
1393                                 brief = 2;
1394                         rv = Examine(devlist, scan?(verbose>1?0:verbose+1):brief,
1395                                      export, scan,
1396                                      SparcAdjust, ss, homehost);
1397                 } else if (devmode == DetailPlatform) {
1398                         rv = Detail_Platform(ss ? ss->ss : NULL, ss ? scan : 1, verbose);
1399                 } else if (devlist == NULL) {
1400                         if (devmode == 'S' && scan)
1401                                 rv = stop_scan(quiet);
1402                         else if ((devmode == 'D' || devmode == Waitclean) && scan)
1403                                 rv = misc_scan(devmode, verbose, export,
1404                                                test, homehost, prefer);
1405                         else if (devmode == UdevRules)
1406                                 rv = Write_rules(udev_filename);
1407                         else {
1408                                 pr_err("No devices given.\n");
1409                                 exit(2);
1410                         }
1411                 } else
1412                         rv = misc_list(devlist, brief, verbose, export, test,
1413                                        homehost, prefer, subarray, update,
1414                                        &ident,
1415                                        ss, force, quiet);
1416                 break;
1417         case MONITOR:
1418                 if (!devlist && !scan) {
1419                         pr_err("Cannot monitor: need --scan or at least one device\n");
1420                         rv = 1;
1421                         break;
1422                 }
1423                 if (pidfile && !daemonise) {
1424                         pr_err("Cannot write a pid file when not in daemon mode\n");
1425                         rv = 1;
1426                         break;
1427                 }
1428                 if (delay == 0) {
1429                         if (get_linux_version() > 2006016)
1430                                 /* mdstat responds to poll */
1431                                 delay = 1000;
1432                         else
1433                                 delay = 60;
1434                 }
1435                 rv= Monitor(devlist, mailaddr, program,
1436                             delay?delay:60, daemonise, scan, oneshot,
1437                             dosyslog, test, pidfile, increments,
1438                             spare_sharing, prefer);
1439                 break;
1440
1441         case GROW:
1442                 if (array_size >= 0) {
1443                         /* alway impose array size first, independent of
1444                          * anything else
1445                          * Do not allow level or raid_disks changes at the
1446                          * same time as that can be irreversibly destructive.
1447                          */
1448                         struct mdinfo sra;
1449                         int err;
1450                         if (raiddisks || level != UnSet) {
1451                                 pr_err("cannot change array size in same operation "
1452                                         "as changing raiddisks or level.\n"
1453                                         "    Change size first, then check that data is still intact.\n");
1454                                 rv = 1;
1455                                 break;
1456                         }
1457                         sysfs_init(&sra, mdfd, 0);
1458                         if (array_size == 0)
1459                                 err = sysfs_set_str(&sra, NULL, "array_size", "default");
1460                         else
1461                                 err = sysfs_set_num(&sra, NULL, "array_size", array_size / 2);
1462                         if (err < 0) {
1463                                 if (errno == E2BIG)
1464                                         pr_err("--array-size setting"
1465                                                 " is too large.\n");
1466                                 else
1467                                         pr_err("current kernel does"
1468                                                 " not support setting --array-size\n");
1469                                 rv = 1;
1470                                 break;
1471                         }
1472                 }
1473                 if (devs_found > 1 && raiddisks == 0) {
1474                         /* must be '-a'. */
1475                         if (size >= 0 || chunk || layout_str != NULL || bitmap_file) {
1476                                 pr_err("--add cannot be used with "
1477                                         "other geometry changes in --grow mode\n");
1478                                 rv = 1;
1479                                 break;
1480                         }
1481                         for (dv=devlist->next; dv ; dv=dv->next) {
1482                                 rv = Grow_Add_device(devlist->devname, mdfd,
1483                                                      dv->devname);
1484                                 if (rv)
1485                                         break;
1486                         }
1487                 } else if (bitmap_file) {
1488                         if (size >= 0 || raiddisks || chunk ||
1489                             layout_str != NULL || devs_found > 1) {
1490                                 pr_err("--bitmap changes cannot be "
1491                                         "used with other geometry changes "
1492                                         "in --grow mode\n");
1493                                 rv = 1;
1494                                 break;
1495                         }
1496                         if (delay == 0)
1497                                 delay = DEFAULT_BITMAP_DELAY;
1498                         rv = Grow_addbitmap(devlist->devname, mdfd, bitmap_file,
1499                                             bitmap_chunk, delay, write_behind, force);
1500                 } else if (grow_continue)
1501                         rv = Grow_continue_command(devlist->devname,
1502                                                    mdfd, backup_file,
1503                                                    verbose);
1504                 else if (size >= 0 || raiddisks != 0 || layout_str != NULL
1505                          || chunk != 0 || level != UnSet) {
1506                         rv = Grow_reshape(devlist->devname, mdfd, quiet, backup_file,
1507                                           size, level, layout_str, chunk, raiddisks,
1508                                           devlist->next,
1509                                           assume_clean, force);
1510                 } else if (array_size < 0)
1511                         pr_err("no changes to --grow\n");
1512                 break;
1513         case INCREMENTAL:
1514                 if (rebuild_map) {
1515                         RebuildMap();
1516                 }
1517                 if (scan) {
1518                         if (runstop <= 0) {
1519                                 pr_err("--incremental --scan meaningless without --run.\n");
1520                                 break;
1521                         }
1522                         if (devmode == 'f') {
1523                                 pr_err("--incremental --scan --fail not supported.\n");
1524                                 break;
1525                         }
1526                         rv = IncrementalScan(verbose);
1527                 }
1528                 if (!devlist) {
1529                         if (!rebuild_map && !scan) {
1530                                 pr_err("--incremental requires a device.\n");
1531                                 rv = 1;
1532                         }
1533                         break;
1534                 }
1535                 if (devlist->next) {
1536                         pr_err("--incremental can only handle one device.\n");
1537                         rv = 1;
1538                         break;
1539                 }
1540                 if (devmode == 'f')
1541                         rv = IncrementalRemove(devlist->devname, remove_path,
1542                                                verbose-quiet);
1543                 else
1544                         rv = Incremental(devlist->devname, verbose-quiet,
1545                                          runstop, ss, homehost,
1546                                          require_homehost, autof,
1547                                          freeze_reshape);
1548                 break;
1549         case AUTODETECT:
1550                 autodetect();
1551                 break;
1552         }
1553         exit(rv);
1554 }
1555
1556 static int scan_assemble(int autof, struct supertype *ss,
1557                          int readonly, int runstop,
1558                          struct mddev_ident *ident,
1559                          char *homehost, int require_homehost,
1560                          int verbose, int force,
1561                          int freeze_reshape)
1562 {
1563         struct mddev_ident *a, *array_list =  conf_get_ident(NULL);
1564         struct mddev_dev *devlist = conf_get_devs();
1565         struct map_ent *map = NULL;
1566         int cnt = 0;
1567         int rv = 0;
1568         int failures, successes;
1569
1570         if (conf_verify_devnames(array_list)) {
1571                 pr_err("Duplicate MD device names in "
1572                        "conf file were found.\n");
1573                 return 1;
1574         }
1575         if (devlist == NULL) {
1576                 pr_err("No devices listed in conf file were found.\n");
1577                 return 1;
1578         }
1579         for (a = array_list; a ; a = a->next) {
1580                 a->assembled = 0;
1581                 if (a->autof == 0)
1582                         a->autof = autof;
1583         }
1584         if (map_lock(&map))
1585                 pr_err("%s: failed to get "
1586                        "exclusive lock on mapfile\n",
1587                        __func__);
1588         do {
1589                 failures = 0;
1590                 successes = 0;
1591                 rv = 0;
1592                 for (a = array_list; a ; a = a->next) {
1593                         int r;
1594                         if (a->assembled)
1595                                 continue;
1596                         if (a->devname &&
1597                             strcasecmp(a->devname, "<ignore>") == 0)
1598                                 continue;
1599
1600                         r = Assemble(ss, a->devname,
1601                                      a,
1602                                      NULL, NULL, 0,
1603                                      readonly, runstop, NULL,
1604                                      homehost, require_homehost,
1605                                      verbose, force,
1606                                      freeze_reshape);
1607                         if (r == 0) {
1608                                 a->assembled = 1;
1609                                 successes++;
1610                         } else
1611                                 failures++;
1612                         rv |= r;
1613                         cnt++;
1614                 }
1615         } while (failures && successes);
1616         if (homehost && cnt == 0) {
1617                 /* Maybe we can auto-assemble something.
1618                  * Repeatedly call Assemble in auto-assemble mode
1619                  * until it fails
1620                  */
1621                 int rv2;
1622                 int acnt;
1623                 ident->autof = autof;
1624                 do {
1625                         struct mddev_dev *devlist = conf_get_devs();
1626                         acnt = 0;
1627                         do {
1628                                 rv2 = Assemble(ss, NULL,
1629                                                ident,
1630                                                devlist, NULL, 0,
1631                                                readonly,
1632                                                runstop, NULL,
1633                                                homehost,
1634                                                require_homehost,
1635                                                verbose,
1636                                                force,
1637                                                freeze_reshape);
1638                                 if (rv2==0) {
1639                                         cnt++;
1640                                         acnt++;
1641                                 }
1642                         } while (rv2!=2);
1643                         /* Incase there are stacked devices, we need to go around again */
1644                 } while (acnt);
1645                 if (cnt == 0 && rv == 0) {
1646                         pr_err("No arrays found in config file or automatically\n");
1647                         rv = 1;
1648                 } else if (cnt)
1649                         rv = 0;
1650         } else if (cnt == 0 && rv == 0) {
1651                 pr_err("No arrays found in config file\n");
1652                 rv = 1;
1653         }
1654         map_unlock(&map);
1655         return rv;
1656 }
1657
1658 static int misc_scan(char devmode, int verbose, int export, int test,
1659                      char *homehost, char *prefer)
1660 {
1661         /* apply --detail or --wait-clean to
1662          * all devices in /proc/mdstat
1663          */
1664         struct mdstat_ent *ms = mdstat_read(0, 1);
1665         struct mdstat_ent *e;
1666         struct map_ent *map = NULL;
1667         int members;
1668         int v = verbose>1?0:verbose+1;
1669         int rv = 0;
1670
1671         for (members = 0; members <= 1; members++) {
1672                 for (e=ms ; e ; e=e->next) {
1673                         char *name;
1674                         struct map_ent *me;
1675                         int member = e->metadata_version &&
1676                                 strncmp(e->metadata_version,
1677                                         "external:/", 10) == 0;
1678                         if (members != member)
1679                                 continue;
1680                         me = map_by_devnum(&map, e->devnum);
1681                         if (me && me->path
1682                             && strcmp(me->path, "/unknown") != 0)
1683                                 name = me->path;
1684                         else
1685                                 name = get_md_name(e->devnum);
1686
1687                         if (!name) {
1688                                 pr_err("cannot find device file for %s\n",
1689                                         e->dev);
1690                                 continue;
1691                         }
1692                         if (devmode == 'D')
1693                                 rv |= Detail(name, v,
1694                                              export, test,
1695                                              homehost, prefer);
1696                         else
1697                                 rv |= WaitClean(name, -1, v);
1698                         put_md_name(name);
1699                 }
1700         }
1701         free_mdstat(ms);
1702         return rv;
1703 }
1704
1705 static int stop_scan(int quiet)
1706 {
1707         /* apply --stop to all devices in /proc/mdstat */
1708         /* Due to possible stacking of devices, repeat until
1709          * nothing more can be stopped
1710          */
1711         int progress=1, err;
1712         int last = 0;
1713         int rv = 0;
1714         do {
1715                 struct mdstat_ent *ms = mdstat_read(0, 0);
1716                 struct mdstat_ent *e;
1717
1718                 if (!progress) last = 1;
1719                 progress = 0; err = 0;
1720                 for (e=ms ; e ; e=e->next) {
1721                         char *name = get_md_name(e->devnum);
1722                         int mdfd;
1723
1724                         if (!name) {
1725                                 pr_err("cannot find device file for %s\n",
1726                                         e->dev);
1727                                 continue;
1728                         }
1729                         mdfd = open_mddev(name, 1);
1730                         if (mdfd >= 0) {
1731                                 if (Manage_runstop(name, mdfd, -1, quiet?1:last?0:-1))
1732                                         err = 1;
1733                                 else
1734                                         progress = 1;
1735                                 close(mdfd);
1736                         }
1737
1738                         put_md_name(name);
1739                 }
1740                 free_mdstat(ms);
1741         } while (!last && err);
1742         if (err)
1743                 rv |= 1;
1744         return rv;
1745 }
1746
1747 static int misc_list(struct mddev_dev *devlist,
1748                      int brief, int verbose, int export, int test,
1749                      char *homehost, char *prefer, char *subarray,
1750                      char *update, struct mddev_ident *ident,
1751                      struct supertype *ss, int force, int quiet)
1752 {
1753         struct mddev_dev *dv;
1754         int rv = 0;
1755
1756         for (dv=devlist ; dv; dv=dv->next) {
1757                 int mdfd;
1758
1759                 switch(dv->disposition) {
1760                 case 'D':
1761                         rv |= Detail(dv->devname,
1762                                      brief?1+verbose:0,
1763                                      export, test, homehost, prefer);
1764                         continue;
1765                 case KillOpt: /* Zero superblock */
1766                         if (ss)
1767                                 rv |= Kill(dv->devname, ss, force, quiet,0);
1768                         else {
1769                                 int q = quiet;
1770                                 do {
1771                                         rv |= Kill(dv->devname, NULL, force, q, 0);
1772                                         q = 1;
1773                                 } while (rv == 0);
1774                                 rv &= ~2;
1775                         }
1776                         continue;
1777                 case 'Q':
1778                         rv |= Query(dv->devname); continue;
1779                 case 'X':
1780                         rv |= ExamineBitmap(dv->devname, brief, ss); continue;
1781                 case 'W':
1782                 case WaitOpt:
1783                         rv |= Wait(dv->devname); continue;
1784                 case Waitclean:
1785                         rv |= WaitClean(dv->devname, -1, verbose-quiet); continue;
1786                 case KillSubarray:
1787                         rv |= Kill_subarray(dv->devname, subarray, quiet);
1788                         continue;
1789                 case UpdateSubarray:
1790                         if (update == NULL) {
1791                                 pr_err("-U/--update must be specified with --update-subarray\n");
1792                                 rv |= 1;
1793                                 continue;
1794                         }
1795                         rv |= Update_subarray(dv->devname, subarray,
1796                                               update, ident, quiet);
1797                         continue;
1798                 }
1799                 mdfd = open_mddev(dv->devname, 1);
1800                 if (mdfd>=0) {
1801                         switch(dv->disposition) {
1802                         case 'R':
1803                                 rv |= Manage_runstop(dv->devname, mdfd, 1, quiet); break;
1804                         case 'S':
1805                                 rv |= Manage_runstop(dv->devname, mdfd, -1, quiet); break;
1806                         case 'o':
1807                                 rv |= Manage_ro(dv->devname, mdfd, 1); break;
1808                         case 'w':
1809                                 rv |= Manage_ro(dv->devname, mdfd, -1); break;
1810                         }
1811                         close(mdfd);
1812                 } else
1813                         rv |= 1;
1814         }
1815         return rv;
1816 }