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