mdadm.c

   1 /*
   2  * mdadm - manage Linux "md" devices aka RAID arrays.
   3  *
   4  * Copyright (C) 2001-2009 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 int main(int argc, char *argv[])
  34 {
  35         int mode = 0;
  36         int opt;
  37         int option_index;
  38         char *c;
  39         int rv;
  40         int i;
  41
  42         int chunk = 0;
  43         long long size = -1;
  44         long long array_size = -1;
  45         int level = UnSet;
  46         int layout = UnSet;
  47         char *layout_str = NULL;
  48         int raiddisks = 0;
  49         int max_disks = MD_SB_DISKS; /* just a default */
  50         int sparedisks = 0;
  51         struct mddev_ident_s ident;
  52         char *configfile = NULL;
  53         char *cp;
  54         char *update = NULL;
  55         int scan = 0;
  56         char devmode = 0;
  57         int runstop = 0;
  58         int readonly = 0;
  59         int write_behind = 0;
  60         int bitmap_fd = -1;
  61         char *bitmap_file = NULL;
  62         char *backup_file = NULL;
  63         int bitmap_chunk = UnSet;
  64         int SparcAdjust = 0;
  65         mddev_dev_t devlist = NULL;
  66         mddev_dev_t *devlistend = & devlist;
  67         mddev_dev_t dv;
  68         int devs_found = 0;
  69         int verbose = 0;
  70         int quiet = 0;
  71         int brief = 0;
  72         int force = 0;
  73         int test = 0;
  74         int export = 0;
  75         int assume_clean = 0;
  76         char *symlinks = NULL;
  77         /* autof indicates whether and how to create device node.
  78          * bottom 3 bits are style.  Rest (when shifted) are number of parts
  79          * 0  - unset
  80          * 1  - don't create (no)
  81          * 2  - if is_standard, then create (yes)
  82          * 3  - create as 'md' - reject is_standard mdp (md)
  83          * 4  - create as 'mdp' - reject is_standard md (mdp)
  84          * 5  - default to md if not is_standard (md in config file)
  85          * 6  - default to mdp if not is_standard (part, or mdp in config file)
  86          */
  87         int autof = 0;
  88
  89         char *homehost = NULL;
  90         char sys_hostname[256];
  91         int require_homehost = 1;
  92         char *mailaddr = NULL;
  93         char *program = NULL;
  94         int increments = 20;
  95         int delay = 0;
  96         int daemonise = 0;
  97         char *pidfile = NULL;
  98         int oneshot = 0;
  99         struct supertype *ss = NULL;
 100         int writemostly = 0;
 101         int re_add = 0;
 102         char *shortopt = short_options;
 103         int dosyslog = 0;
 104         int rebuild_map = 0;
 105         int auto_update_home = 0;
 106
 107         int print_help = 0;
 108         FILE *outf;
 109
 110         int mdfd = -1;
 111
 112         srandom(time(0) ^ getpid());
 113
 114         ident.uuid_set=0;
 115         ident.level = UnSet;
 116         ident.raid_disks = UnSet;
 117         ident.super_minor= UnSet;
 118         ident.devices=0;
 119         ident.spare_group = NULL;
 120         ident.autof = 0;
 121         ident.st = NULL;
 122         ident.bitmap_fd = -1;
 123         ident.bitmap_file = NULL;
 124         ident.name[0] = 0;
 125         ident.container = NULL;
 126         ident.member = NULL;
 127
 128         while ((option_index = -1) ,
 129                (opt=getopt_long(argc, argv,
 130                                 shortopt, long_options,
 131                                 &option_index)) != -1) {
 132                 int newmode = mode;
 133                 /* firstly, some mode-independent options */
 134                 switch(opt) {
 135                 case 'h':
 136                         if (option_index > 0 &&
 137                             strcmp(long_options[option_index].name, "help-options")==0)
 138                                 print_help = 2;
 139                         else
 140                                 print_help = 1;
 141                         continue;
 142
 143                 case 'V':
 144                         fputs(Version, stderr);
 145                         exit(0);
 146
 147                 case 'v': verbose++;
 148                         continue;
 149
 150                 case 'q': quiet++;
 151                         continue;
 152
 153                 case 'b':
 154                         if (mode == ASSEMBLE || mode == BUILD || mode == CREATE || mode == GROW)
 155                                 break; /* b means bitmap */
 156                         brief = 1;
 157                         if (optarg) {
 158                                 fprintf(stderr, Name ": -b cannot have any extra immediately after it, sorry.\n");
 159                                 exit(2);
 160                         }
 161                         continue;
 162
 163                 case 'Y': export++;
 164                         continue;
 165
 166                 case HomeHost:
 167                         if (strcasecmp(optarg, "<ignore>") == 0)
 168                                 require_homehost = 0;
 169                         else
 170                                 homehost = optarg;
 171                         continue;
 172
 173                 case ':':
 174                 case '?':
 175                         fputs(Usage, stderr);
 176                         exit(2);
 177                 }
 178                 /* second, figure out the mode.
 179                  * Some options force the mode.  Others
 180                  * set the mode if it isn't already
 181                  */
 182
 183                 switch(opt) {
 184                 case '@': /* just incase they say --manage */
 185                         newmode = MANAGE;
 186                         shortopt = short_bitmap_options;
 187                         break;
 188                 case 'a':
 189                 case 'r':
 190                 case 'f':
 191                 case ReAdd: /* re-add */
 192                         if (!mode) {
 193                                 newmode = MANAGE;
 194                                 shortopt = short_bitmap_options;
 195                         }
 196                         break;
 197
 198                 case 'A': newmode = ASSEMBLE; shortopt = short_bitmap_auto_options; break;
 199                 case 'B': newmode = BUILD; shortopt = short_bitmap_auto_options; break;
 200                 case 'C': newmode = CREATE; shortopt = short_bitmap_auto_options; break;
 201                 case 'F': newmode = MONITOR;break;
 202                 case 'G': newmode = GROW;
 203                         shortopt = short_bitmap_options;
 204                         break;
 205                 case 'I': newmode = INCREMENTAL;
 206                         shortopt = short_bitmap_auto_options; break;
 207                 case AutoDetect:
 208                         newmode = AUTODETECT; break;
 209
 210                 case '#':
 211                 case 'D':
 212                 case 'E':
 213                 case 'X':
 214                 case 'Q': newmode = MISC; break;
 215                 case 'R':
 216                 case 'S':
 217                 case 'o':
 218                 case 'w':
 219                 case 'W':
 220                 case Waitclean:
 221                 case DetailPlatform:
 222                 case 'K': if (!mode) newmode = MISC; break;
 223                 }
 224                 if (mode && newmode == mode) {
 225                         /* everybody happy ! */
 226                 } else if (mode && newmode != mode) {
 227                         /* not allowed.. */
 228                         fprintf(stderr, Name ": ");
 229                         if (option_index >= 0)
 230                                 fprintf(stderr, "--%s", long_options[option_index].name);
 231                         else
 232                                 fprintf(stderr, "-%c", opt);
 233                         fprintf(stderr, " would set mdadm mode to \"%s\", but it is already set to \"%s\".\n",
 234                                 map_num(modes, newmode),
 235                                 map_num(modes, mode));
 236                         exit(2);
 237                 } else if (!mode && newmode) {
 238                         mode = newmode;
 239                 } else {
 240                         /* special case of -c --help */
 241                         if (opt == 'c' &&
 242                             ( strncmp(optarg, "--h", 3)==0 ||
 243                               strncmp(optarg, "-h", 2)==0)) {
 244                                 fputs(Help_config, stdout);
 245                                 exit(0);
 246                         }
 247
 248                         /* If first option is a device, don't force the mode yet */
 249                         if (opt == 1) {
 250                                 if (devs_found == 0) {
 251                                         dv = malloc(sizeof(*dv));
 252                                         if (dv == NULL) {
 253                                                 fprintf(stderr, Name ": malloc failed\n");
 254                                                 exit(3);
 255                                         }
 256                                         dv->devname = optarg;
 257                                         dv->disposition = devmode;
 258                                         dv->writemostly = writemostly;
 259                                         dv->re_add = re_add;
 260                                         dv->used = 0;
 261                                         dv->content = NULL;
 262                                         dv->next = NULL;
 263                                         *devlistend = dv;
 264                                         devlistend = &dv->next;
 265
 266                                         devs_found++;
 267                                         continue;
 268                                 }
 269                                 /* No mode yet, and this is the second device ... */
 270                                 fprintf(stderr, Name ": An option must be given to set the mode before a second device is listed\n");
 271                                 exit(2);
 272                         }
 273                         if (option_index >= 0)
 274                                 fprintf(stderr, Name ": --%s", long_options[option_index].name);
 275                         else
 276                                 fprintf(stderr, Name ": -%c", opt);
 277                         fprintf(stderr, " does not set the mode, and so cannot be the first option.\n");
 278                         exit(2);
 279                 }
 280
 281                 /* if we just set the mode, then done */
 282                 switch(opt) {
 283                 case '@':
 284                 case '#':
 285                 case 'A':
 286                 case 'B':
 287                 case 'C':
 288                 case 'F':
 289                 case 'G':
 290                 case 'I':
 291                 case AutoDetect:
 292                         continue;
 293                 }
 294                 if (opt == 1) {
 295                         /* an undecorated option - must be a device name.
 296                          */
 297                         if (devs_found > 0 && mode == '@' && !devmode) {
 298                                 fprintf(stderr, Name ": Must give one of -a/-r/-f for subsequent devices at %s\n", optarg);
 299                                 exit(2);
 300                         }
 301                         if (devs_found > 0 && mode == 'G' && !devmode) {
 302                                 fprintf(stderr, Name ": Must give one of -a for devices do add: %s\n", optarg);
 303                                 exit(2);
 304                         }
 305                         dv = malloc(sizeof(*dv));
 306                         if (dv == NULL) {
 307                                 fprintf(stderr, Name ": malloc failed\n");
 308                                 exit(3);
 309                         }
 310                         dv->devname = optarg;
 311                         dv->disposition = devmode;
 312                         dv->writemostly = writemostly;
 313                         dv->re_add = re_add;
 314                         dv->used = 0;
 315                         dv->content = NULL;
 316                         dv->next = NULL;
 317                         *devlistend = dv;
 318                         devlistend = &dv->next;
 319
 320                         devs_found++;
 321                         continue;
 322                 }
 323
 324                 /* We've got a mode, and opt is now something else which
 325                  * could depend on the mode */
 326 #define O(a,b) ((a<<8)|b)
 327                 switch (O(mode,opt)) {
 328                 case O(GROW,'c'):
 329                 case O(CREATE,'c'):
 330                 case O(BUILD,'c'): /* chunk or rounding */
 331                         if (chunk) {
 332                                 fprintf(stderr, Name ": chunk/rounding may only be specified once. "
 333                                         "Second value is %s.\n", optarg);
 334                                 exit(2);
 335                         }
 336                         chunk = strtol(optarg, &c, 10);
 337                         if (!optarg[0] || *c || chunk<4 || ((chunk-1)&chunk)) {
 338                                 fprintf(stderr, Name ": invalid chunk/rounding value: %s\n",
 339                                         optarg);
 340                                 exit(2);
 341                         }
 342                         continue;
 343
 344 #if 0
 345                 case O(ASSEMBLE,AutoHomeHost):
 346                         auto_update_home = 1;
 347                         continue;
 348 #endif
 349                 case O(INCREMENTAL, 'e'):
 350                 case O(CREATE,'e'):
 351                 case O(ASSEMBLE,'e'):
 352                 case O(MISC,'e'): /* set metadata (superblock) information */
 353                         if (ss) {
 354                                 fprintf(stderr, Name ": metadata information already given\n");
 355                                 exit(2);
 356                         }
 357                         for(i=0; !ss && superlist[i]; i++)
 358                                 ss = superlist[i]->match_metadata_desc(optarg);
 359
 360                         if (!ss) {
 361                                 fprintf(stderr, Name ": unrecognised metadata identifier: %s\n", optarg);
 362                                 exit(2);
 363                         }
 364                         max_disks = ss->max_devs;
 365                         continue;
 366
 367                 case O(MANAGE,'W'):
 368                 case O(BUILD,'W'):
 369                 case O(CREATE,'W'):
 370                         /* set write-mostly for following devices */
 371                         writemostly = 1;
 372                         continue;
 373
 374                 case O(MANAGE,'w'):
 375                         /* clear write-mostly for following devices */
 376                         writemostly = 2;
 377                         continue;
 378
 379
 380                 case O(GROW,'z'):
 381                 case O(CREATE,'z'):
 382                 case O(BUILD,'z'): /* size */
 383                         if (size >= 0) {
 384                                 fprintf(stderr, Name ": size may only be specified once. "
 385                                         "Second value is %s.\n", optarg);
 386                                 exit(2);
 387                         }
 388                         if (strcmp(optarg, "max")==0)
 389                                 size = 0;
 390                         else {
 391                                 size = parse_size(optarg);
 392                                 if (size < 8) {
 393                                         fprintf(stderr, Name ": invalid size: %s\n",
 394                                                 optarg);
 395                                         exit(2);
 396                                 }
 397                                 /* convert sectors to K */
 398                                 size /= 2;
 399                         }
 400                         continue;
 401
 402                 case O(GROW,'Z'): /* array size */
 403                         if (array_size >= 0) {
 404                                 fprintf(stderr, Name ": array-size may only be specified once. "
 405                                         "Second value is %s.\n", optarg);
 406                                 exit(2);
 407                         }
 408                         if (strcmp(optarg, "max") == 0)
 409                                 array_size = 0;
 410                         else {
 411                                 array_size = parse_size(optarg);
 412                                 if (array_size <= 0) {
 413                                         fprintf(stderr, Name ": invalid array size: %s\n",
 414                                                 optarg);
 415                                         exit(2);
 416                                 }
 417                         }
 418                         continue;
 419
 420                 case O(GROW,'l'):
 421                 case O(CREATE,'l'):
 422                 case O(BUILD,'l'): /* set raid level*/
 423                         if (level != UnSet) {
 424                                 fprintf(stderr, Name ": raid level may only be set once.  "
 425                                         "Second value is %s.\n", optarg);
 426                                 exit(2);
 427                         }
 428                         level = map_name(pers, optarg);
 429                         if (level == UnSet) {
 430                                 fprintf(stderr, Name ": invalid raid level: %s\n",
 431                                         optarg);
 432                                 exit(2);
 433                         }
 434                         if (level != 0 && level != LEVEL_LINEAR && level != 1 &&
 435                             level != LEVEL_MULTIPATH && level != LEVEL_FAULTY &&
 436                             level != 10 &&
 437                             mode == BUILD) {
 438                                 fprintf(stderr, Name ": Raid level %s not permitted with --build.\n",
 439                                         optarg);
 440                                 exit(2);
 441                         }
 442                         if (sparedisks > 0 && level < 1 && level >= -1) {
 443                                 fprintf(stderr, Name ": raid level %s is incompatible with spare-devices setting.\n",
 444                                         optarg);
 445                                 exit(2);
 446                         }
 447                         ident.level = level;
 448                         continue;
 449
 450                 case O(GROW, 'p'): /* new layout */
 451                         if (layout_str) {
 452                                 fprintf(stderr,Name ": layout may only be sent once.  "
 453                                         "Second value was %s\n", optarg);
 454                                 exit(2);
 455                         }
 456                         layout_str = optarg;
 457                         /* 'Grow' will parse the value */
 458                         continue;
 459
 460                 case O(CREATE,'p'): /* raid5 layout */
 461                 case O(BUILD,'p'): /* faulty layout */
 462                         if (layout != UnSet) {
 463                                 fprintf(stderr,Name ": layout may only be sent once.  "
 464                                         "Second value was %s\n", optarg);
 465                                 exit(2);
 466                         }
 467                         switch(level) {
 468                         default:
 469                                 fprintf(stderr, Name ": layout not meaningful for %s arrays.\n",
 470                                         map_num(pers, level));
 471                                 exit(2);
 472                         case UnSet:
 473                                 fprintf(stderr, Name ": raid level must be given before layout.\n");
 474                                 exit(2);
 475
 476                         case 5:
 477                                 layout = map_name(r5layout, optarg);
 478                                 if (layout==UnSet) {
 479                                         fprintf(stderr, Name ": layout %s not understood for raid5.\n",
 480                                                 optarg);
 481                                         exit(2);
 482                                 }
 483                                 break;
 484                         case 6:
 485                                 layout = map_name(r6layout, optarg);
 486                                 if (layout==UnSet) {
 487                                         fprintf(stderr, Name ": layout %s not understood for raid6.\n",
 488                                                 optarg);
 489                                         exit(2);
 490                                 }
 491                                 break;
 492
 493                         case 10:
 494                                 layout = parse_layout_10(optarg);
 495                                 if (layout < 0) {
 496                                         fprintf(stderr, Name ": layout for raid10 must be 'nNN', 'oNN' or 'fNN' where NN is a number, not %s\n", optarg);
 497                                         exit(2);
 498                                 }
 499                                 break;
 500                         case LEVEL_FAULTY:
 501                                 /* Faulty
 502                                  * modeNNN
 503                                  */
 504                                 layout = parse_layout_faulty(optarg);
 505                                 if (layout == -1) {
 506                                         fprintf(stderr, Name ": layout %s not understood for faulty.\n",
 507                                                 optarg);
 508                                         exit(2);
 509                                 }
 510                                 break;
 511                         }
 512                         continue;
 513
 514                 case O(CREATE,AssumeClean):
 515                 case O(BUILD,AssumeClean): /* assume clean */
 516                         assume_clean = 1;
 517                         continue;
 518
 519                 case O(GROW,'n'):
 520                 case O(CREATE,'n'):
 521                 case O(BUILD,'n'): /* number of raid disks */
 522                         if (raiddisks) {
 523                                 fprintf(stderr, Name ": raid-devices set twice: %d and %s\n",
 524                                         raiddisks, optarg);
 525                                 exit(2);
 526                         }
 527                         raiddisks = strtol(optarg, &c, 10);
 528                         if (!optarg[0] || *c || raiddisks<=0) {
 529                                 fprintf(stderr, Name ": invalid number of raid devices: %s\n",
 530                                         optarg);
 531                                 exit(2);
 532                         }
 533                         ident.raid_disks = raiddisks;
 534                         continue;
 535
 536                 case O(CREATE,'x'): /* number of spare (eXtra) discs */
 537                         if (sparedisks) {
 538                                 fprintf(stderr,Name ": spare-devices set twice: %d and %s\n",
 539                                         sparedisks, optarg);
 540                                 exit(2);
 541                         }
 542                         if (level != UnSet && level <= 0 && level >= -1) {
 543                                 fprintf(stderr, Name ": spare-devices setting is incompatible with raid level %d\n",
 544                                         level);
 545                                 exit(2);
 546                         }
 547                         sparedisks = strtol(optarg, &c, 10);
 548                         if (!optarg[0] || *c || sparedisks < 0) {
 549                                 fprintf(stderr, Name ": invalid number of spare-devices: %s\n",
 550                                         optarg);
 551                                 exit(2);
 552                         }
 553                         continue;
 554
 555                 case O(CREATE,'a'):
 556                 case O(BUILD,'a'):
 557                 case O(INCREMENTAL,'a'):
 558                 case O(ASSEMBLE,'a'): /* auto-creation of device node */
 559                         autof = parse_auto(optarg, "--auto flag", 0);
 560                         continue;
 561
 562                 case O(CREATE,Symlinks):
 563                 case O(BUILD,Symlinks):
 564                 case O(ASSEMBLE,Symlinks): /* auto creation of symlinks in /dev to /dev/md */
 565                         symlinks = optarg;
 566                         continue;
 567
 568                 case O(BUILD,'f'): /* force honouring '-n 1' */
 569                 case O(GROW,'f'): /* ditto */
 570                 case O(CREATE,'f'): /* force honouring of device list */
 571                 case O(ASSEMBLE,'f'): /* force assembly */
 572                 case O(MISC,'f'): /* force zero */
 573                         force=1;
 574                         continue;
 575
 576                         /* now for the Assemble options */
 577                 case O(CREATE,'u'): /* uuid of array */
 578                 case O(ASSEMBLE,'u'): /* uuid of array */
 579                         if (ident.uuid_set) {
 580                                 fprintf(stderr, Name ": uuid cannot be set twice.  "
 581                                         "Second value %s.\n", optarg);
 582                                 exit(2);
 583                         }
 584                         if (parse_uuid(optarg, ident.uuid))
 585                                 ident.uuid_set = 1;
 586                         else {
 587                                 fprintf(stderr,Name ": Bad uuid: %s\n", optarg);
 588                                 exit(2);
 589                         }
 590                         continue;
 591
 592                 case O(CREATE,'N'):
 593                 case O(ASSEMBLE,'N'):
 594                         if (ident.name[0]) {
 595                                 fprintf(stderr, Name ": name cannot be set twice.   "
 596                                         "Second value %s.\n", optarg);
 597                                 exit(2);
 598                         }
 599                         if (strlen(optarg) > 32) {
 600                                 fprintf(stderr, Name ": name '%s' is too long, 32 chars max.\n",
 601                                         optarg);
 602                                 exit(2);
 603                         }
 604                         strcpy(ident.name, optarg);
 605                         continue;
 606
 607                 case O(ASSEMBLE,'m'): /* super-minor for array */
 608                         if (ident.super_minor != UnSet) {
 609                                 fprintf(stderr, Name ": super-minor cannot be set twice.  "
 610                                         "Second value: %s.\n", optarg);
 611                                 exit(2);
 612                         }
 613                         if (strcmp(optarg, "dev")==0)
 614                                 ident.super_minor = -2;
 615                         else {
 616                                 ident.super_minor = strtoul(optarg, &cp, 10);
 617                                 if (!optarg[0] || *cp) {
 618                                         fprintf(stderr, Name ": Bad super-minor number: %s.\n", optarg);
 619                                         exit(2);
 620                                 }
 621                         }
 622                         continue;
 623
 624                 case O(ASSEMBLE,'U'): /* update the superblock */
 625                         if (update) {
 626                                 fprintf(stderr, Name ": Can only update one aspect of superblock, both %s and %s given.\n",
 627                                         update, optarg);
 628                                 exit(2);
 629                         }
 630                         update = optarg;
 631                         if (strcmp(update, "sparc2.2")==0)
 632                                 continue;
 633                         if (strcmp(update, "super-minor") == 0)
 634                                 continue;
 635                         if (strcmp(update, "summaries")==0)
 636                                 continue;
 637                         if (strcmp(update, "resync")==0)
 638                                 continue;
 639                         if (strcmp(update, "uuid")==0)
 640                                 continue;
 641                         if (strcmp(update, "name")==0)
 642                                 continue;
 643                         if (strcmp(update, "homehost")==0)
 644                                 continue;
 645                         if (strcmp(update, "devicesize")==0)
 646                                 continue;
 647                         if (strcmp(update, "byteorder")==0) {
 648                                 if (ss) {
 649                                         fprintf(stderr, Name ": must not set metadata type with --update=byteorder.\n");
 650                                         exit(2);
 651                                 }
 652                                 for(i=0; !ss && superlist[i]; i++)
 653                                         ss = superlist[i]->match_metadata_desc("0.swap");
 654                                 if (!ss) {
 655                                         fprintf(stderr, Name ": INTERNAL ERROR cannot find 0.swap\n");
 656                                         exit(2);
 657                                 }
 658
 659                                 continue;
 660                         }
 661                         if (strcmp(update,"?") == 0 ||
 662                             strcmp(update, "help") == 0) {
 663                                 outf = stdout;
 664                                 fprintf(outf, Name ": ");
 665                         } else {
 666                                 outf = stderr;
 667                                 fprintf(outf,
 668                                         Name ": '--update=%s' is invalid.  ",
 669                                         update);
 670                         }
 671                         fprintf(outf, "Valid --update options are:\n"
 672                 "     'sparc2.2', 'super-minor', 'uuid', 'name', 'resync',\n"
 673                 "     'summaries', 'homehost', 'byteorder', 'devicesize'.\n");
 674                         exit(outf == stdout ? 0 : 2);
 675
 676                 case O(INCREMENTAL,NoDegraded):
 677                 case O(ASSEMBLE,NoDegraded): /* --no-degraded */
 678                         runstop = -1; /* --stop isn't allowed for --assemble,
 679                                        * so we overload slightly */
 680                         continue;
 681
 682                 case O(ASSEMBLE,'c'): /* config file */
 683                 case O(INCREMENTAL, 'c'):
 684                 case O(MISC, 'c'):
 685                 case O(MONITOR,'c'):
 686                         if (configfile) {
 687                                 fprintf(stderr, Name ": configfile cannot be set twice.  "
 688                                         "Second value is %s.\n", optarg);
 689                                 exit(2);
 690                         }
 691                         configfile = optarg;
 692                         set_conffile(configfile);
 693                         /* FIXME possibly check that config file exists.  Even parse it */
 694                         continue;
 695                 case O(ASSEMBLE,'s'): /* scan */
 696                 case O(MISC,'s'):
 697                 case O(MONITOR,'s'):
 698                 case O(INCREMENTAL,'s'):
 699                         scan = 1;
 700                         continue;
 701
 702                 case O(MONITOR,'m'): /* mail address */
 703                         if (mailaddr)
 704                                 fprintf(stderr, Name ": only specify one mailaddress. %s ignored.\n",
 705                                         optarg);
 706                         else
 707                                 mailaddr = optarg;
 708                         continue;
 709
 710                 case O(MONITOR,'p'): /* alert program */
 711                         if (program)
 712                                 fprintf(stderr, Name ": only specify one alter program. %s ignored.\n",
 713                                         optarg);
 714                         else
 715                                 program = optarg;
 716                         continue;
 717
 718                 case O(MONITOR,'r'): /* rebuild increments */
 719                         increments = atoi(optarg);
 720                         if (increments>99 || increments<1) {
 721                                 fprintf(stderr, Name ": please specify positive integer between 1 and 99 as rebuild increments.\n");
 722                                 exit(2);
 723                         }
 724                         continue;
 725
 726                 case O(MONITOR,'d'): /* delay in seconds */
 727                 case O(GROW, 'd'):
 728                 case O(BUILD,'d'): /* delay for bitmap updates */
 729                 case O(CREATE,'d'):
 730                         if (delay)
 731                                 fprintf(stderr, Name ": only specify delay once. %s ignored.\n",
 732                                         optarg);
 733                         else {
 734                                 delay = strtol(optarg, &c, 10);
 735                                 if (!optarg[0] || *c || delay<1) {
 736                                         fprintf(stderr, Name ": invalid delay: %s\n",
 737                                                 optarg);
 738                                         exit(2);
 739                                 }
 740                         }
 741                         continue;
 742                 case O(MONITOR,'f'): /* daemonise */
 743                         daemonise = 1;
 744                         continue;
 745                 case O(MONITOR,'i'): /* pid */
 746                         if (pidfile)
 747                                 fprintf(stderr, Name ": only specify one pid file. %s ignored.\n",
 748                                         optarg);
 749                         else
 750                                 pidfile = optarg;
 751                         continue;
 752                 case O(MONITOR,'1'): /* oneshot */
 753                         oneshot = 1;
 754                         continue;
 755                 case O(MONITOR,'t'): /* test */
 756                         test = 1;
 757                         continue;
 758                 case O(MONITOR,'y'): /* log messages to syslog */
 759                         openlog("mdadm", LOG_PID, SYSLOG_FACILITY);
 760                         dosyslog = 1;
 761                         continue;
 762
 763                         /* now the general management options.  Some are applicable
 764                          * to other modes. None have arguments.
 765                          */
 766                 case O(GROW,'a'):
 767                 case O(MANAGE,'a'): /* add a drive */
 768                         devmode = 'a';
 769                         re_add = 0;
 770                         continue;
 771                 case O(MANAGE,ReAdd):
 772                         devmode = 'a';
 773                         re_add = 1;
 774                         continue;
 775                 case O(MANAGE,'r'): /* remove a drive */
 776                         devmode = 'r';
 777                         continue;
 778                 case O(MANAGE,'f'): /* set faulty */
 779                         devmode = 'f';
 780                         continue;
 781                 case O(INCREMENTAL,'R'):
 782                 case O(MANAGE,'R'):
 783                 case O(ASSEMBLE,'R'):
 784                 case O(BUILD,'R'):
 785                 case O(CREATE,'R'): /* Run the array */
 786                         if (runstop < 0) {
 787                                 fprintf(stderr, Name ": Cannot both Stop and Run an array\n");
 788                                 exit(2);
 789                         }
 790                         runstop = 1;
 791                         continue;
 792                 case O(MANAGE,'S'):
 793                         if (runstop > 0) {
 794                                 fprintf(stderr, Name ": Cannot both Run and Stop an array\n");
 795                                 exit(2);
 796                         }
 797                         runstop = -1;
 798                         continue;
 799
 800                 case O(MISC,'Q'):
 801                 case O(MISC,'D'):
 802                 case O(MISC,'E'):
 803                 case O(MISC,'K'):
 804                 case O(MISC,'R'):
 805                 case O(MISC,'S'):
 806                 case O(MISC,'X'):
 807                 case O(MISC,'o'):
 808                 case O(MISC,'w'):
 809                 case O(MISC,'W'):
 810                 case O(MISC, Waitclean):
 811                 case O(MISC, DetailPlatform):
 812                         if (devmode && devmode != opt &&
 813                             (devmode == 'E' || (opt == 'E' && devmode != 'Q'))) {
 814                                 fprintf(stderr, Name ": --examine/-E cannot be given with -%c\n",
 815                                         devmode =='E'?opt:devmode);
 816                                 exit(2);
 817                         }
 818                         devmode = opt;
 819                         continue;
 820                 case O(MISC,'t'):
 821                         test = 1;
 822                         continue;
 823
 824                 case O(MISC, Sparc22):
 825                         if (devmode != 'E') {
 826                                 fprintf(stderr, Name ": --sparc2.2 only allowed with --examine\n");
 827                                 exit(2);
 828                         }
 829                         SparcAdjust = 1;
 830                         continue;
 831
 832                 case O(ASSEMBLE,'b'): /* here we simply set the bitmap file */
 833                         if (!optarg) {
 834                                 fprintf(stderr, Name ": bitmap file needed with -b in --assemble mode\n");
 835                                 exit(2);
 836                         }
 837                         if (strcmp(optarg, "internal")==0) {
 838                                 fprintf(stderr, Name ": there is no need to specify --bitmap when assembling arrays with internal bitmaps\n");
 839                                 continue;
 840                         }
 841                         bitmap_fd = open(optarg, O_RDWR);
 842                         if (!*optarg || bitmap_fd < 0) {
 843                                 fprintf(stderr, Name ": cannot open bitmap file %s: %s\n", optarg, strerror(errno));
 844                                 exit(2);
 845                         }
 846                         ident.bitmap_fd = bitmap_fd; /* for Assemble */
 847                         continue;
 848
 849                 case O(ASSEMBLE, BackupFile):
 850                 case O(GROW, BackupFile):
 851                         /* Specify a file into which grow might place a backup,
 852                          * or from which assemble might recover a backup
 853                          */
 854                         if (backup_file) {
 855                                 fprintf(stderr, Name ": backup file already specified, rejecting %s\n", optarg);
 856                                 exit(2);
 857                         }
 858                         backup_file = optarg;
 859                         continue;
 860
 861                 case O(BUILD,'b'):
 862                 case O(CREATE,'b'): /* here we create the bitmap */
 863                         if (strcmp(optarg, "none") == 0) {
 864                                 fprintf(stderr, Name ": '--bitmap none' only"
 865                                         " support for --grow\n");
 866                                 exit(2);
 867                         }
 868                         /* FALL THROUGH */
 869                 case O(GROW,'b'):
 870                         if (strcmp(optarg, "internal")== 0 ||
 871                             strcmp(optarg, "none")== 0 ||
 872                             strchr(optarg, '/') != NULL) {
 873                                 bitmap_file = optarg;
 874                                 continue;
 875                         }
 876                         /* probable typo */
 877                         fprintf(stderr, Name ": bitmap file must contain a '/', or be 'internal', or 'none'\n");
 878                         exit(2);
 879
 880                 case O(GROW,BitmapChunk):
 881                 case O(BUILD,BitmapChunk):
 882                 case O(CREATE,BitmapChunk): /* bitmap chunksize */
 883                         bitmap_chunk = strtol(optarg, &c, 10);
 884                         if (!optarg[0] || *c || bitmap_chunk < 0 ||
 885                                         bitmap_chunk & (bitmap_chunk - 1)) {
 886                                 fprintf(stderr, Name ": invalid bitmap chunksize: %s\n",
 887                                                 optarg);
 888                                 exit(2);
 889                         }
 890                         /* convert K to B, chunk of 0K means 512B */
 891                         bitmap_chunk = bitmap_chunk ? bitmap_chunk * 1024 : 512;
 892                         continue;
 893
 894                 case O(GROW, WriteBehind):
 895                 case O(BUILD, WriteBehind):
 896                 case O(CREATE, WriteBehind): /* write-behind mode */
 897                         write_behind = DEFAULT_MAX_WRITE_BEHIND;
 898                         if (optarg) {
 899                                 write_behind = strtol(optarg, &c, 10);
 900                                 if (write_behind < 0 || *c ||
 901                                     write_behind > 16383) {
 902                                         fprintf(stderr, Name ": Invalid value for maximum outstanding write-behind writes: %s.\n\tMust be between 0 and 16383.\n", optarg);
 903                                         exit(2);
 904                                 }
 905                         }
 906                         continue;
 907
 908                 case O(INCREMENTAL, 'r'):
 909                         rebuild_map = 1;
 910                         continue;
 911                 }
 912                 /* We have now processed all the valid options. Anything else is
 913                  * an error
 914                  */
 915                 if (option_index > 0)
 916                         fprintf(stderr, Name ":option --%s not valid in %s mode\n",
 917                                 long_options[option_index].name,
 918                                 map_num(modes, mode));
 919                 else
 920                         fprintf(stderr, Name ": option -%c not valid in %s mode\n",
 921                                 opt, map_num(modes, mode));
 922                 exit(2);
 923
 924         }
 925
 926         if (print_help) {
 927                 char *help_text = Help;
 928                 if (print_help == 2)
 929                         help_text = OptionHelp;
 930                 else
 931                         switch (mode) {
 932                         case ASSEMBLE : help_text = Help_assemble; break;
 933                         case BUILD    : help_text = Help_build; break;
 934                         case CREATE   : help_text = Help_create; break;
 935                         case MANAGE   : help_text = Help_manage; break;
 936                         case MISC     : help_text = Help_misc; break;
 937                         case MONITOR  : help_text = Help_monitor; break;
 938                         case GROW     : help_text = Help_grow; break;
 939                         case INCREMENTAL:help_text= Help_incr; break;
 940                         }
 941                 fputs(help_text,stdout);
 942                 exit(0);
 943         }
 944
 945         if (!mode && devs_found) {
 946                 mode = MISC;
 947                 devmode = 'Q';
 948                 if (devlist->disposition == 0)
 949                         devlist->disposition = devmode;
 950         }
 951         if (!mode) {
 952                 fputs(Usage, stderr);
 953                 exit(2);
 954         }
 955
 956         if (symlinks) {
 957                 struct createinfo *ci = conf_get_create_info();
 958
 959                 if (strcasecmp(symlinks, "yes") == 0)
 960                         ci->symlinks = 1;
 961                 else if (strcasecmp(symlinks, "no") == 0)
 962                         ci->symlinks = 0;
 963                 else {
 964                         fprintf(stderr, Name ": option --symlinks must be 'no' or 'yes'\n");
 965                         exit(2);
 966                 }
 967         }
 968         /* Ok, got the option parsing out of the way
 969          * hopefully it's mostly right but there might be some stuff
 970          * missing
 971          *
 972          * That is mosty checked in the per-mode stuff but...
 973          *
 974          * For @,B,C  and A without -s, the first device listed must be an md device
 975          * we check that here and open it.
 976          */
 977
 978         if (mode==MANAGE || mode == BUILD || mode == CREATE || mode == GROW ||
 979             (mode == ASSEMBLE && ! scan)) {
 980                 if (devs_found < 1) {
 981                         fprintf(stderr, Name ": an md device must be given in this mode\n");
 982                         exit(2);
 983                 }
 984                 if ((int)ident.super_minor == -2 && autof) {
 985                         fprintf(stderr, Name ": --super-minor=dev is incompatible with --auto\n");
 986                         exit(2);
 987                 }
 988                 if (mode == MANAGE || mode == GROW) {
 989                         mdfd = open_mddev(devlist->devname, 1);
 990                         if (mdfd < 0)
 991                                 exit(1);
 992                 } else
 993                         /* non-existent device is OK */
 994                         mdfd = open_mddev(devlist->devname, 0);
 995                 if (mdfd == -2) {
 996                         fprintf(stderr, Name ": device %s exists but is not an "
 997                                 "md array.\n", devlist->devname);
 998                         exit(1);
 999                 }
1000                 if ((int)ident.super_minor == -2) {
1001                         struct stat stb;
1002                         if (mdfd < 0) {
1003                                 fprintf(stderr, Name ": --super-minor=dev given, and "
1004                                         "listed device %s doesn't exist.\n",
1005                                         devlist->devname);
1006                                 exit(1);
1007                         }
1008                         fstat(mdfd, &stb);
1009                         ident.super_minor = minor(stb.st_rdev);
1010                 }
1011                 if (mdfd >= 0 && mode != MANAGE && mode != GROW) {
1012                         /* We don't really want this open yet, we just might
1013                          * have wanted to check some things
1014                          */
1015                         close(mdfd);
1016                         mdfd = -1;
1017                 }
1018         }
1019
1020         if (raiddisks) {
1021                 if (raiddisks > max_disks) {
1022                         fprintf(stderr, Name ": invalid number of raid devices: %d\n",
1023                                 raiddisks);
1024                         exit(2);
1025                 }
1026                 if (raiddisks == 1 &&  !force && level != -5) {
1027                         fprintf(stderr, Name ": '1' is an unusual number of drives for an array, so it is probably\n"
1028                                 "     a mistake.  If you really mean it you will need to specify --force before\n"
1029                                 "     setting the number of drives.\n");
1030                         exit(2);
1031                 }
1032         }
1033         if (sparedisks) {
1034                 if ( sparedisks > max_disks - raiddisks) {
1035                         fprintf(stderr, Name ": invalid number of spare-devices: %d\n",
1036                                 sparedisks);
1037                         exit(2);
1038                 }
1039         }
1040
1041         if (homehost == NULL)
1042                 homehost = conf_get_homehost(&require_homehost);
1043         if (homehost == NULL || strcmp(homehost, "<system>")==0) {
1044                 if (gethostname(sys_hostname, sizeof(sys_hostname)) == 0) {
1045                         sys_hostname[sizeof(sys_hostname)-1] = 0;
1046                         homehost = sys_hostname;
1047                 }
1048         }
1049
1050         ident.autof = autof;
1051
1052         rv = 0;
1053         switch(mode) {
1054         case MANAGE:
1055                 /* readonly, add/remove, readwrite, runstop */
1056                 if (readonly>0)
1057                         rv = Manage_ro(devlist->devname, mdfd, readonly);
1058                 if (!rv && devs_found>1)
1059                         rv = Manage_subdevs(devlist->devname, mdfd,
1060                                             devlist->next, verbose-quiet);
1061                 if (!rv && readonly < 0)
1062                         rv = Manage_ro(devlist->devname, mdfd, readonly);
1063                 if (!rv && runstop)
1064                         rv = Manage_runstop(devlist->devname, mdfd, runstop, quiet);
1065                 break;
1066         case ASSEMBLE:
1067                 if (devs_found == 1 && ident.uuid_set == 0 &&
1068                     ident.super_minor == UnSet && ident.name[0] == 0 && !scan ) {
1069                         /* Only a device has been given, so get details from config file */
1070                         mddev_ident_t array_ident = conf_get_ident(devlist->devname);
1071                         if (array_ident == NULL) {
1072                                 fprintf(stderr, Name ": %s not identified in config file.\n",
1073                                         devlist->devname);
1074                                 rv |= 1;
1075                                 if (mdfd >= 0)
1076                                         close(mdfd);
1077                         } else {
1078                                 if (array_ident->autof == 0)
1079                                         array_ident->autof = autof;
1080                                 rv |= Assemble(ss, devlist->devname, array_ident,
1081                                                NULL, backup_file,
1082                                                readonly, runstop, update,
1083                                                homehost, require_homehost,
1084                                                verbose-quiet, force);
1085                         }
1086                 } else if (!scan)
1087                         rv = Assemble(ss, devlist->devname, &ident,
1088                                       devlist->next, backup_file,
1089                                       readonly, runstop, update,
1090                                       homehost, require_homehost,
1091                                       verbose-quiet, force);
1092                 else if (devs_found>0) {
1093                         if (update && devs_found > 1) {
1094                                 fprintf(stderr, Name ": can only update a single array at a time\n");
1095                                 exit(1);
1096                         }
1097                         if (backup_file && devs_found > 1) {
1098                                 fprintf(stderr, Name ": can only assemble a single array when providing a backup file.\n");
1099                                 exit(1);
1100                         }
1101                         for (dv = devlist ; dv ; dv=dv->next) {
1102                                 mddev_ident_t array_ident = conf_get_ident(dv->devname);
1103                                 if (array_ident == NULL) {
1104                                         fprintf(stderr, Name ": %s not identified in config file.\n",
1105                                                 dv->devname);
1106                                         rv |= 1;
1107                                         continue;
1108                                 }
1109                                 if (array_ident->autof == 0)
1110                                         array_ident->autof = autof;
1111                                 rv |= Assemble(ss, dv->devname, array_ident,
1112                                                NULL, backup_file,
1113                                                readonly, runstop, update,
1114                                                homehost, require_homehost,
1115                                                verbose-quiet, force);
1116                         }
1117                 } else {
1118                         mddev_ident_t array_list =  conf_get_ident(NULL);
1119                         mddev_dev_t devlist = conf_get_devs();
1120                         int cnt = 0;
1121                         if (devlist == NULL) {
1122                                 fprintf(stderr, Name ": No devices listed in conf file were found.\n");
1123                                 exit(1);
1124                         }
1125                         if (update) {
1126                                 fprintf(stderr, Name ": --update not meaningful with a --scan assembly.\n");
1127                                 exit(1);
1128                         }
1129                         if (backup_file) {
1130                                 fprintf(stderr, Name ": --backup_file not meaningful with a --scan assembly.\n");
1131                                 exit(1);
1132                         }
1133                         for (; array_list; array_list = array_list->next) {
1134                                 if (array_list->devname &&
1135                                     strcasecmp(array_list->devname, "<ignore>") == 0)
1136                                         continue;
1137                                 if (array_list->autof == 0)
1138                                         array_list->autof = autof;
1139
1140                                 rv |= Assemble(ss, array_list->devname,
1141                                                array_list,
1142                                                NULL, NULL,
1143                                                readonly, runstop, NULL,
1144                                                homehost, require_homehost,
1145                                                verbose-quiet, force);
1146                                 cnt++;
1147                         }
1148                         if (homehost && cnt == 0) {
1149                                 /* Maybe we can auto-assemble something.
1150                                  * Repeatedly call Assemble in auto-assemble mode
1151                                  * until it fails
1152                                  */
1153                                 int rv2;
1154                                 int acnt;
1155                                 ident.autof = autof;
1156                                 do {
1157                                         mddev_dev_t devlist = conf_get_devs();
1158                                         acnt = 0;
1159                                         do {
1160                                                 rv2 = Assemble(ss, NULL,
1161                                                                &ident,
1162                                                                devlist, NULL,
1163                                                                readonly, runstop, NULL,
1164                                                                homehost, require_homehost,
1165                                                                verbose-quiet, force);
1166                                                 if (rv2==0) {
1167                                                         cnt++;
1168                                                         acnt++;
1169                                                 }
1170                                                 if (rv2 == 1)
1171                                                         /* found something so even though assembly failed  we
1172                                                          * want to avoid auto-updates
1173                                                          */
1174                                                         auto_update_home = 0;
1175                                         } while (rv2!=2);
1176                                         /* Incase there are stacked devices, we need to go around again */
1177                                 } while (acnt);
1178 #if 0
1179                                 if (cnt == 0 && auto_update_home && homehost) {
1180                                         /* Nothing found, maybe we need to bootstrap homehost info */
1181                                         do {
1182                                                 acnt = 0;
1183                                                 do {
1184                                                         rv2 = Assemble(ss, NULL,
1185                                                                        &ident,
1186                                                                        NULL, NULL,
1187                                                                        readonly, runstop, "homehost",
1188                                                                        homehost, require_homehost,
1189                                                                        verbose-quiet, force);
1190                                                         if (rv2==0) {
1191                                                                 cnt++;
1192                                                                 acnt++;
1193                                                         }
1194                                                 } while (rv2!=2);
1195                                                 /* Incase there are stacked devices, we need to go around again */
1196                                         } while (acnt);
1197                                 }
1198 #endif
1199                                 if (cnt == 0 && rv == 0) {
1200                                         fprintf(stderr, Name ": No arrays found in config file or automatically\n");
1201                                         rv = 1;
1202                                 } else if (cnt)
1203                                         rv = 0;
1204                         } else if (cnt == 0 && rv == 0) {
1205                                 fprintf(stderr, Name ": No arrays found in config file\n");
1206                                 rv = 1;
1207                         }
1208                 }
1209                 break;
1210         case BUILD:
1211                 if (delay == 0) delay = DEFAULT_BITMAP_DELAY;
1212                 if (write_behind && !bitmap_file) {
1213                         fprintf(stderr, Name ": write-behind mode requires a bitmap.\n");
1214                         rv = 1;
1215                         break;
1216                 }
1217                 if (raiddisks == 0) {
1218                         fprintf(stderr, Name ": no raid-devices specified.\n");
1219                         rv = 1;
1220                         break;
1221                 }
1222
1223                 if (bitmap_file) {
1224                         if (strcmp(bitmap_file, "internal")==0) {
1225                                 fprintf(stderr, Name ": 'internal' bitmaps not supported with --build\n");
1226                                 rv |= 1;
1227                                 break;
1228                         }
1229                 }
1230                 rv = Build(devlist->devname, chunk, level, layout,
1231                            raiddisks, devlist->next, assume_clean,
1232                            bitmap_file, bitmap_chunk, write_behind,
1233                            delay, verbose-quiet, autof, size);
1234                 break;
1235         case CREATE:
1236                 if (delay == 0) delay = DEFAULT_BITMAP_DELAY;
1237                 if (write_behind && !bitmap_file) {
1238                         fprintf(stderr, Name ": write-behind mode requires a bitmap.\n");
1239                         rv = 1;
1240                         break;
1241                 }
1242                 if (raiddisks == 0) {
1243                         fprintf(stderr, Name ": no raid-devices specified.\n");
1244                         rv = 1;
1245                         break;
1246                 }
1247
1248                 rv = Create(ss, devlist->devname, chunk, level, layout, size<0 ? 0 : size,
1249                             raiddisks, sparedisks, ident.name, homehost,
1250                             ident.uuid_set ? ident.uuid : NULL,
1251                             devs_found-1, devlist->next, runstop, verbose-quiet, force, assume_clean,
1252                             bitmap_file, bitmap_chunk, write_behind, delay, autof);
1253                 break;
1254         case MISC:
1255                 if (devmode == 'E') {
1256                         if (devlist == NULL && !scan) {
1257                                 fprintf(stderr, Name ": No devices to examine\n");
1258                                 exit(2);
1259                         }
1260                         if (devlist == NULL)
1261                                 devlist = conf_get_devs();
1262                         if (devlist == NULL) {
1263                                 fprintf(stderr, Name ": No devices listed in %s\n", configfile?configfile:DefaultConfFile);
1264                                 exit(1);
1265                         }
1266                         if (brief && verbose)
1267                                 brief = 2;
1268                         rv = Examine(devlist, scan?(verbose>1?0:verbose+1):brief,
1269                                      export, scan,
1270                                      SparcAdjust, ss, homehost);
1271                 } else if (devmode == DetailPlatform) {
1272                         rv = Detail_Platform(ss ? ss->ss : NULL, ss ? scan : 1, verbose);
1273                 } else {
1274                         if (devlist == NULL) {
1275                                 if ((devmode=='D' || devmode == Waitclean) && scan) {
1276                                         /* apply --detail or --wait-clean to
1277                                          * all devices in /proc/mdstat
1278                                          */
1279                                         struct mdstat_ent *ms = mdstat_read(0, 1);
1280                                         struct mdstat_ent *e;
1281                                         struct map_ent *map = NULL;
1282                                         int members;
1283                                         int v = verbose>1?0:verbose+1;
1284
1285                                         for (members = 0; members <= 1; members++) {
1286                                         for (e=ms ; e ; e=e->next) {
1287                                                 char *name;
1288                                                 struct map_ent *me;
1289                                                 int member = e->metadata_version &&
1290                                                         strncmp(e->metadata_version,
1291                                                                 "external:/", 10) == 0;
1292                                                 if (members != member)
1293                                                         continue;
1294                                                 me = map_by_devnum(&map, e->devnum);
1295                                                 if (me && me->path
1296                                                     && strcmp(me->path, "/unknown") != 0)
1297                                                         name = me->path;
1298                                                 else
1299                                                         name = get_md_name(e->devnum);
1300
1301                                                 if (!name) {
1302                                                         fprintf(stderr, Name ": cannot find device file for %s\n",
1303                                                                 e->dev);
1304                                                         continue;
1305                                                 }
1306                                                 if (devmode == 'D')
1307                                                         rv |= Detail(name, v,
1308                                                                      export, test,
1309                                                                      homehost);
1310                                                 else
1311                                                         rv |= WaitClean(name, -1, v);
1312                                                 put_md_name(name);
1313                                         }
1314                                         }
1315                                         free_mdstat(ms);
1316                                 } else  if (devmode == 'S' && scan) {
1317                                         /* apply --stop to all devices in /proc/mdstat */
1318                                         /* Due to possible stacking of devices, repeat until
1319                                          * nothing more can be stopped
1320                                          */
1321                                         int progress=1, err;
1322                                         int last = 0;
1323                                         do {
1324                                                 struct mdstat_ent *ms = mdstat_read(0, 0);
1325                                                 struct mdstat_ent *e;
1326
1327                                                 if (!progress) last = 1;
1328                                                 progress = 0; err = 0;
1329                                                 for (e=ms ; e ; e=e->next) {
1330                                                         char *name = get_md_name(e->devnum);
1331
1332                                                         if (!name) {
1333                                                                 fprintf(stderr, Name ": cannot find device file for %s\n",
1334                                                                         e->dev);
1335                                                                 continue;
1336                                                         }
1337                                                         mdfd = open_mddev(name, 1);
1338                                                         if (mdfd >= 0) {
1339                                                                 if (Manage_runstop(name, mdfd, -1, quiet?1:last?0:-1))
1340                                                                         err = 1;
1341                                                                 else
1342                                                                         progress = 1;
1343                                                                 close(mdfd);
1344                                                         }
1345
1346                                                         put_md_name(name);
1347                                                 }
1348                                                 free_mdstat(ms);
1349                                         } while (!last && err);
1350                                         if (err) rv |= 1;
1351                                 } else {
1352                                         fprintf(stderr, Name ": No devices given.\n");
1353                                         exit(2);
1354                                 }
1355                         }
1356                         for (dv=devlist ; dv; dv=dv->next) {
1357                                 switch(dv->disposition) {
1358                                 case 'D':
1359                                         rv |= Detail(dv->devname,
1360                                                      brief?1+verbose:0,
1361                                                      export, test, homehost);
1362                                         continue;
1363                                 case 'K': /* Zero superblock */
1364                                         if (ss)
1365                                                 rv |= Kill(dv->devname, ss, force, quiet,0);
1366                                         else {
1367                                                 int q = quiet;
1368                                                 do {
1369                                                         rv |= Kill(dv->devname, NULL, force, q, 0);
1370                                                         q = 1;
1371                                                 } while ((rv & 2) == 0);
1372                                                 rv &= ~2;
1373                                         }
1374                                         continue;
1375                                 case 'Q':
1376                                         rv |= Query(dv->devname); continue;
1377                                 case 'X':
1378                                         rv |= ExamineBitmap(dv->devname, brief, ss); continue;
1379                                 case 'W':
1380                                         rv |= Wait(dv->devname); continue;
1381                                 case Waitclean:
1382                                         rv |= WaitClean(dv->devname, -1, verbose-quiet); continue;
1383                                 }
1384                                 mdfd = open_mddev(dv->devname, 1);
1385                                 if (mdfd>=0) {
1386                                         switch(dv->disposition) {
1387                                         case 'R':
1388                                                 rv |= Manage_runstop(dv->devname, mdfd, 1, quiet); break;
1389                                         case 'S':
1390                                                 rv |= Manage_runstop(dv->devname, mdfd, -1, quiet); break;
1391                                         case 'o':
1392                                                 rv |= Manage_ro(dv->devname, mdfd, 1); break;
1393                                         case 'w':
1394                                                 rv |= Manage_ro(dv->devname, mdfd, -1); break;
1395                                         }
1396                                         close(mdfd);
1397                                 } else
1398                                         rv |= 1;
1399                         }
1400                 }
1401                 break;
1402         case MONITOR:
1403                 if (!devlist && !scan) {
1404                         fprintf(stderr, Name ": Cannot monitor: need --scan or at least one device\n");
1405                         rv = 1;
1406                         break;
1407                 }
1408                 if (pidfile && !daemonise) {
1409                         fprintf(stderr, Name ": Cannot write a pid file when not in daemon mode\n");
1410                         rv = 1;
1411                         break;
1412                 }
1413                 if (delay == 0) {
1414                         if (get_linux_version() > 20616)
1415                                 /* mdstat responds to poll */
1416                                 delay = 1000;
1417                         else
1418                                 delay = 60;
1419                 }
1420                 rv= Monitor(devlist, mailaddr, program,
1421                             delay?delay:60, daemonise, scan, oneshot,
1422                             dosyslog, test, pidfile, increments);
1423                 break;
1424
1425         case GROW:
1426                 if (array_size >= 0) {
1427                         /* alway impose array size first, independent of
1428                          * anything else
1429                          * Do not allow level or raid_disks changes at the
1430                          * same time as that can be irreversibly destructive.
1431                          */
1432                         struct mdinfo sra;
1433                         int err;
1434                         if (raiddisks || level != UnSet) {
1435                                 fprintf(stderr, Name ": cannot change array size in same operation "
1436                                         "as changing raiddisks or level.\n"
1437                                         "    Change size first, then check that data is still intact.\n");
1438                                 rv = 1;
1439                                 break;
1440                         }
1441                         sysfs_init(&sra, mdfd, 0);
1442                         if (array_size == 0)
1443                                 err = sysfs_set_str(&sra, NULL, "array_size", "default");
1444                         else
1445                                 err = sysfs_set_num(&sra, NULL, "array_size", array_size / 2);
1446                         if (err < 0) {
1447                                 if (errno == E2BIG)
1448                                         fprintf(stderr, Name ": --array-size setting"
1449                                                 " is too large.\n");
1450                                 else
1451                                         fprintf(stderr, Name ": current kernel does"
1452                                                 " not support setting --array-size\n");
1453                                 rv = 1;
1454                                 break;
1455                         }
1456                 }
1457                 if (devs_found > 1) {
1458
1459                         /* must be '-a'. */
1460                         if (size >= 0 || raiddisks || chunk || layout_str != NULL || bitmap_file) {
1461                                 fprintf(stderr, Name ": --add cannot be used with other geometry changes in --grow mode\n");
1462                                 rv = 1;
1463                                 break;
1464                         }
1465                         for (dv=devlist->next; dv ; dv=dv->next) {
1466                                 rv = Grow_Add_device(devlist->devname, mdfd, dv->devname);
1467                                 if (rv)
1468                                         break;
1469                         }
1470                 } else if (bitmap_file) {
1471                         if (size >= 0 || raiddisks || chunk || layout_str != NULL) {
1472                                 fprintf(stderr, Name ": --bitmap changes cannot be used with other geometry changes in --grow mode\n");
1473                                 rv = 1;
1474                                 break;
1475                         }
1476                         if (delay == 0)
1477                                 delay = DEFAULT_BITMAP_DELAY;
1478                         rv = Grow_addbitmap(devlist->devname, mdfd, bitmap_file,
1479                                             bitmap_chunk, delay, write_behind, force);
1480                 } else if (size >= 0 || raiddisks != 0 || layout_str != NULL
1481                            || chunk != 0 || level != UnSet) {
1482                         rv = Grow_reshape(devlist->devname, mdfd, quiet, backup_file,
1483                                           size, level, layout_str, chunk, raiddisks);
1484                 } else if (array_size < 0)
1485                         fprintf(stderr, Name ": no changes to --grow\n");
1486                 break;
1487         case INCREMENTAL:
1488                 if (rebuild_map) {
1489                         RebuildMap();
1490                 }
1491                 if (scan) {
1492                         if (runstop <= 0) {
1493                                 fprintf(stderr, Name
1494                          ": --incremental --scan meaningless without --run.\n");
1495                                 break;
1496                         }
1497                         rv = IncrementalScan(verbose);
1498                 }
1499                 if (!devlist) {
1500                         if (!rebuild_map && !scan) {
1501                                 fprintf(stderr, Name
1502                                         ": --incremental requires a device.\n");
1503                                 rv = 1;
1504                         }
1505                         break;
1506                 }
1507                 if (devlist->next) {
1508                         fprintf(stderr, Name
1509                                ": --incremental can only handle one device.\n");
1510                         rv = 1;
1511                         break;
1512                 }
1513                 rv = Incremental(devlist->devname, verbose-quiet, runstop,
1514                                  ss, homehost, require_homehost, autof);
1515                 break;
1516         case AUTODETECT:
1517                 autodetect();
1518                 break;
1519         }
1520         exit(rv);
1521 }