mdadm.c

   1 /*
   2  * mdadm - manage Linux "md" devices aka RAID arrays.
   3  *
   4  * Copyright (C) 2001-2006 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@cse.unsw.edu.au>
  23  *    Paper: Neil Brown
  24  *           School of Computer Science and Engineering
  25  *           The University of New South Wales
  26  *           Sydney, 2052
  27  *           Australia
  28  *
  29  *    Additions for bitmap and write-behind RAID options, Copyright (C) 2003-2004,
  30  *    Paul Clements, SteelEye Technology, Inc.
  31  */
  32
  33 #include "mdadm.h"
  34 #include "md_p.h"
  35 #include <ctype.h>
  36
  37
  38 int main(int argc, char *argv[])
  39 {
  40         int mode = 0;
  41         int opt;
  42         int option_index;
  43         char *c;
  44         int rv;
  45         int i;
  46
  47         int chunk = 0;
  48         long long size = -1;
  49         long long array_size = -1;
  50         int level = UnSet;
  51         int layout = UnSet;
  52         char *layout_str = NULL;
  53         int raiddisks = 0;
  54         int max_disks = MD_SB_DISKS; /* just a default */
  55         int sparedisks = 0;
  56         struct mddev_ident_s ident;
  57         char *configfile = NULL;
  58         char *cp;
  59         char *update = NULL;
  60         int scan = 0;
  61         char devmode = 0;
  62         int runstop = 0;
  63         int readonly = 0;
  64         int write_behind = 0;
  65         int bitmap_fd = -1;
  66         char *bitmap_file = NULL;
  67         char *backup_file = NULL;
  68         int bitmap_chunk = UnSet;
  69         int SparcAdjust = 0;
  70         mddev_dev_t devlist = NULL;
  71         mddev_dev_t *devlistend = & devlist;
  72         mddev_dev_t dv;
  73         int devs_found = 0;
  74         int verbose = 0;
  75         int quiet = 0;
  76         int brief = 0;
  77         int force = 0;
  78         int test = 0;
  79         int export = 0;
  80         int assume_clean = 0;
  81         char *symlinks = NULL;
  82         /* autof indicates whether and how to create device node.
  83          * bottom 3 bits are style.  Rest (when shifted) are number of parts
  84          * 0  - unset
  85          * 1  - don't create (no)
  86          * 2  - if is_standard, then create (yes)
  87          * 3  - create as 'md' - reject is_standard mdp (md)
  88          * 4  - create as 'mdp' - reject is_standard md (mdp)
  89          * 5  - default to md if not is_standard (md in config file)
  90          * 6  - default to mdp if not is_standard (part, or mdp in config file)
  91          */
  92         int autof = 0;
  93
  94         char *homehost = NULL;
  95         char sys_hostname[256];
  96         int require_homehost = 1;
  97         char *mailaddr = NULL;
  98         char *program = NULL;
  99         int delay = 0;
 100         int daemonise = 0;
 101         char *pidfile = NULL;
 102         int oneshot = 0;
 103         struct supertype *ss = NULL;
 104         int writemostly = 0;
 105         int re_add = 0;
 106         char *shortopt = short_options;
 107         int dosyslog = 0;
 108         int rebuild_map = 0;
 109         int auto_update_home = 0;
 110
 111         int print_help = 0;
 112         FILE *outf;
 113
 114         int mdfd = -1;
 115
 116         srandom(time(0) ^ getpid());
 117
 118         ident.uuid_set=0;
 119         ident.level = UnSet;
 120         ident.raid_disks = UnSet;
 121         ident.super_minor= UnSet;
 122         ident.devices=0;
 123         ident.spare_group = NULL;
 124         ident.autof = 0;
 125         ident.st = NULL;
 126         ident.bitmap_fd = -1;
 127         ident.bitmap_file = NULL;
 128         ident.name[0] = 0;
 129         ident.container = NULL;
 130         ident.member = NULL;
 131
 132         while ((option_index = -1) ,
 133                (opt=getopt_long(argc, argv,
 134                                 shortopt, long_options,
 135                                 &option_index)) != -1) {
 136                 int newmode = mode;
 137                 /* firstly, some mode-independent options */
 138                 switch(opt) {
 139                 case 'h':
 140                         if (option_index > 0 &&
 141                             strcmp(long_options[option_index].name, "help-options")==0)
 142                                 print_help = 2;
 143                         else
 144                                 print_help = 1;
 145                         continue;
 146
 147                 case 'V':
 148                         fputs(Version, stderr);
 149                         exit(0);
 150
 151                 case 'v': verbose++;
 152                         continue;
 153
 154                 case 'q': quiet++;
 155                         continue;
 156
 157                 case 'b':
 158                         if (mode == ASSEMBLE || mode == BUILD || mode == CREATE || mode == GROW)
 159                                 break; /* b means bitmap */
 160                         brief = 1;
 161                         if (optarg) {
 162                                 fprintf(stderr, Name ": -b cannot have any extra immediately after it, sorry.\n");
 163                                 exit(2);
 164                         }
 165                         continue;
 166
 167                 case 'Y': export++;
 168                         continue;
 169
 170                 case HomeHost:
 171                         if (strcasecmp(optarg, "<ignore>") == 0)
 172                                 require_homehost = 0;
 173                         else
 174                                 homehost = optarg;
 175                         continue;
 176
 177                 case ':':
 178                 case '?':
 179                         fputs(Usage, stderr);
 180                         exit(2);
 181                 }
 182                 /* second, figure out the mode.
 183                  * Some options force the mode.  Others
 184                  * set the mode if it isn't already
 185                  */
 186
 187                 switch(opt) {
 188                 case '@': /* just incase they say --manage */
 189                         newmode = MANAGE;
 190                         shortopt = short_bitmap_options;
 191                         break;
 192                 case 'a':
 193                 case 'r':
 194                 case 'f':
 195                 case ReAdd: /* re-add */
 196                         if (!mode) {
 197                                 newmode = MANAGE;
 198                                 shortopt = short_bitmap_options;
 199                         }
 200                         break;
 201
 202                 case 'A': newmode = ASSEMBLE; shortopt = short_bitmap_auto_options; break;
 203                 case 'B': newmode = BUILD; shortopt = short_bitmap_auto_options; break;
 204                 case 'C': newmode = CREATE; shortopt = short_bitmap_auto_options; break;
 205                 case 'F': newmode = MONITOR;break;
 206                 case 'G': newmode = GROW;
 207                         shortopt = short_bitmap_options;
 208                         break;
 209                 case 'I': newmode = INCREMENTAL;
 210                         shortopt = short_bitmap_auto_options; break;
 211                 case AutoDetect:
 212                         newmode = AUTODETECT; break;
 213
 214                 case '#':
 215                 case 'D':
 216                 case 'E':
 217                 case 'X':
 218                 case 'Q': newmode = MISC; break;
 219                 case 'R':
 220                 case 'S':
 221                 case 'o':
 222                 case 'w':
 223                 case 'W':
 224                 case Waitclean:
 225                 case DetailPlatform:
 226                 case 'K': if (!mode) newmode = MISC; break;
 227                 }
 228                 if (mode && newmode == mode) {
 229                         /* everybody happy ! */
 230                 } else if (mode && newmode != mode) {
 231                         /* not allowed.. */
 232                         fprintf(stderr, Name ": ");
 233                         if (option_index >= 0)
 234                                 fprintf(stderr, "--%s", long_options[option_index].name);
 235                         else
 236                                 fprintf(stderr, "-%c", opt);
 237                         fprintf(stderr, " would set mdadm mode to \"%s\", but it is already set to \"%s\".\n",
 238                                 map_num(modes, newmode),
 239                                 map_num(modes, mode));
 240                         exit(2);
 241                 } else if (!mode && newmode) {
 242                         mode = newmode;
 243                 } else {
 244                         /* special case of -c --help */
 245                         if (opt == 'c' &&
 246                             ( strncmp(optarg, "--h", 3)==0 ||
 247                               strncmp(optarg, "-h", 2)==0)) {
 248                                 fputs(Help_config, stdout);
 249                                 exit(0);
 250                         }
 251
 252                         /* If first option is a device, don't force the mode yet */
 253                         if (opt == 1) {
 254                                 if (devs_found == 0) {
 255                                         dv = malloc(sizeof(*dv));
 256                                         if (dv == NULL) {
 257                                                 fprintf(stderr, Name ": malloc failed\n");
 258                                                 exit(3);
 259                                         }
 260                                         dv->devname = optarg;
 261                                         dv->disposition = devmode;
 262                                         dv->writemostly = writemostly;
 263                                         dv->re_add = re_add;
 264                                         dv->used = 0;
 265                                         dv->content = NULL;
 266                                         dv->next = NULL;
 267                                         *devlistend = dv;
 268                                         devlistend = &dv->next;
 269
 270                                         devs_found++;
 271                                         continue;
 272                                 }
 273                                 /* No mode yet, and this is the second device ... */
 274                                 fprintf(stderr, Name ": An option must be given to set the mode before a second device is listed\n");
 275                                 exit(2);
 276                         }
 277                         if (option_index >= 0)
 278                                 fprintf(stderr, Name ": --%s", long_options[option_index].name);
 279                         else
 280                                 fprintf(stderr, Name ": -%c", opt);
 281                         fprintf(stderr, " does not set the mode, and so cannot be the first option.\n");
 282                         exit(2);
 283                 }
 284
 285                 /* if we just set the mode, then done */
 286                 switch(opt) {
 287                 case '@':
 288                 case '#':
 289                 case 'A':
 290                 case 'B':
 291                 case 'C':
 292                 case 'F':
 293                 case 'G':
 294                 case 'I':
 295                 case AutoDetect:
 296                         continue;
 297                 }
 298                 if (opt == 1) {
 299                         /* an undecorated option - must be a device name.
 300                          */
 301                         if (devs_found > 0 && mode == '@' && !devmode) {
 302                                 fprintf(stderr, Name ": Must give one of -a/-r/-f for subsequent devices at %s\n", optarg);
 303                                 exit(2);
 304                         }
 305                         if (devs_found > 0 && mode == 'G' && !devmode) {
 306                                 fprintf(stderr, Name ": Must give one of -a for devices do add: %s\n", optarg);
 307                                 exit(2);
 308                         }
 309                         dv = malloc(sizeof(*dv));
 310                         if (dv == NULL) {
 311                                 fprintf(stderr, Name ": malloc failed\n");
 312                                 exit(3);
 313                         }
 314                         dv->devname = optarg;
 315                         dv->disposition = devmode;
 316                         dv->writemostly = writemostly;
 317                         dv->re_add = re_add;
 318                         dv->used = 0;
 319                         dv->content = NULL;
 320                         dv->next = NULL;
 321                         *devlistend = dv;
 322                         devlistend = &dv->next;
 323
 324                         devs_found++;
 325                         continue;
 326                 }
 327
 328                 /* We've got a mode, and opt is now something else which
 329                  * could depend on the mode */
 330 #define O(a,b) ((a<<8)|b)
 331                 switch (O(mode,opt)) {
 332                 case O(CREATE,'c'):
 333                 case O(BUILD,'c'): /* chunk or rounding */
 334                         if (chunk) {
 335                                 fprintf(stderr, Name ": chunk/rounding may only be specified once. "
 336                                         "Second value is %s.\n", optarg);
 337                                 exit(2);
 338                         }
 339                         chunk = strtol(optarg, &c, 10);
 340                         if (!optarg[0] || *c || chunk<4 || ((chunk-1)&chunk)) {
 341                                 fprintf(stderr, Name ": invalid chunk/rounding value: %s\n",
 342                                         optarg);
 343                                 exit(2);
 344                         }
 345                         continue;
 346
 347                 case O(ASSEMBLE,AutoHomeHost):
 348                         auto_update_home = 1;
 349                         continue;
 350                 case O(INCREMENTAL, 'e'):
 351                 case O(CREATE,'e'):
 352                 case O(ASSEMBLE,'e'):
 353                 case O(MISC,'e'): /* set metadata (superblock) information */
 354                         if (ss) {
 355                                 fprintf(stderr, Name ": metadata information already given\n");
 356                                 exit(2);
 357                         }
 358                         for(i=0; !ss && superlist[i]; i++)
 359                                 ss = superlist[i]->match_metadata_desc(optarg);
 360
 361                         if (!ss) {
 362                                 fprintf(stderr, Name ": unrecognised metadata identifier: %s\n", optarg);
 363                                 exit(2);
 364                         }
 365                         max_disks = ss->max_devs;
 366                         continue;
 367
 368                 case O(MANAGE,'W'):
 369                 case O(BUILD,'W'):
 370                 case O(CREATE,'W'):
 371                         /* set write-mostly for following devices */
 372                         writemostly = 1;
 373                         continue;
 374
 375                 case O(MANAGE,'w'):
 376                         /* clear write-mostly for following devices */
 377                         writemostly = 2;
 378                         continue;
 379
 380
 381                 case O(GROW,'z'):
 382                 case O(CREATE,'z'):
 383                 case O(BUILD,'z'): /* size */
 384                         if (size >= 0) {
 385                                 fprintf(stderr, Name ": size may only be specified once. "
 386                                         "Second value is %s.\n", optarg);
 387                                 exit(2);
 388                         }
 389                         if (strcmp(optarg, "max")==0)
 390                                 size = 0;
 391                         else {
 392                                 size = strtoll(optarg, &c, 10);
 393                                 if (!optarg[0] || *c || size < 4) {
 394                                         fprintf(stderr, Name ": invalid size: %s\n",
 395                                                 optarg);
 396                                         exit(2);
 397                                 }
 398                         }
 399                         continue;
 400
 401                 case O(GROW,'Z'): /* array size */
 402                         if (array_size >= 0) {
 403                                 fprintf(stderr, Name ": array-size may only be specified once. "
 404                                         "Second value is %s.\n", optarg);
 405                                 exit(2);
 406                         }
 407                         if (strcmp(optarg, "max") == 0)
 408                                 array_size = 0;
 409                         else {
 410                                 array_size = parse_size(optarg);
 411                                 if (array_size <= 0) {
 412                                         fprintf(stderr, Name ": invalid array size: %s\n",
 413                                                 optarg);
 414                                         exit(2);
 415                                 }
 416                         }
 417                         continue;
 418
 419                 case O(GROW,'l'): /* hack - needed to understand layout */
 420                 case O(CREATE,'l'):
 421                 case O(BUILD,'l'): /* set raid level*/
 422                         if (level != UnSet) {
 423                                 fprintf(stderr, Name ": raid level may only be set once.  "
 424                                         "Second value is %s.\n", optarg);
 425                                 exit(2);
 426                         }
 427                         level = map_name(pers, optarg);
 428                         if (level == UnSet) {
 429                                 fprintf(stderr, Name ": invalid raid level: %s\n",
 430                                         optarg);
 431                                 exit(2);
 432                         }
 433                         if (level != 0 && level != -1 && level != 1 && level != -4 && level != -5 && mode == BUILD) {
 434                                 fprintf(stderr, Name ": Raid level %s not permitted with --build.\n",
 435                                         optarg);
 436                                 exit(2);
 437                         }
 438                         if (sparedisks > 0 && level < 1 && level >= -1) {
 439                                 fprintf(stderr, Name ": raid level %s is incompatible with spare-devices setting.\n",
 440                                         optarg);
 441                                 exit(2);
 442                         }
 443                         ident.level = level;
 444                         continue;
 445
 446                 case O(GROW, 'p'): /* new layout */
 447                         if (layout_str) {
 448                                 fprintf(stderr,Name ": layout may only be sent once.  "
 449                                         "Second value was %s\n", optarg);
 450                                 exit(2);
 451                         }
 452                         layout_str = optarg;
 453                         /* 'Grow' will parse the value */
 454                         continue;
 455
 456                 case O(CREATE,'p'): /* raid5 layout */
 457                 case O(BUILD,'p'): /* faulty layout */
 458                         if (layout != UnSet) {
 459                                 fprintf(stderr,Name ": layout may only be sent once.  "
 460                                         "Second value was %s\n", optarg);
 461                                 exit(2);
 462                         }
 463                         switch(level) {
 464                         default:
 465                                 fprintf(stderr, Name ": layout not meaningful for %s arrays.\n",
 466                                         map_num(pers, level));
 467                                 exit(2);
 468                         case UnSet:
 469                                 fprintf(stderr, Name ": raid level must be given before layout.\n");
 470                                 exit(2);
 471
 472                         case 5:
 473                                 layout = map_name(r5layout, optarg);
 474                                 if (layout==UnSet) {
 475                                         fprintf(stderr, Name ": layout %s not understood for raid5.\n",
 476                                                 optarg);
 477                                         exit(2);
 478                                 }
 479                                 break;
 480                         case 6:
 481                                 layout = map_name(r6layout, optarg);
 482                                 if (layout==UnSet) {
 483                                         fprintf(stderr, Name ": layout %s not understood for raid6.\n",
 484                                                 optarg);
 485                                         exit(2);
 486                                 }
 487                                 break;
 488
 489                         case 10:
 490                                 layout = parse_layout_10(optarg);
 491                                 if (layout < 0) {
 492                                         fprintf(stderr, Name ": layout for raid10 must be 'nNN', 'oNN' or 'fNN' where NN is a number, not %s\n", optarg);
 493                                         exit(2);
 494                                 }
 495                                 break;
 496                         case LEVEL_FAULTY:
 497                                 /* Faulty
 498                                  * modeNNN
 499                                  */
 500                                 layout = parse_layout_faulty(optarg);
 501                                 if (layout == -1) {
 502                                         fprintf(stderr, Name ": layout %s not understood for faulty.\n",
 503                                                 optarg);
 504                                         exit(2);
 505                                 }
 506                                 break;
 507                         }
 508                         continue;
 509
 510                 case O(CREATE,AssumeClean):
 511                 case O(BUILD,AssumeClean): /* assume clean */
 512                         assume_clean = 1;
 513                         continue;
 514
 515                 case O(GROW,'n'):
 516                 case O(CREATE,'n'):
 517                 case O(BUILD,'n'): /* number of raid disks */
 518                         if (raiddisks) {
 519                                 fprintf(stderr, Name ": raid-devices set twice: %d and %s\n",
 520                                         raiddisks, optarg);
 521                                 exit(2);
 522                         }
 523                         raiddisks = strtol(optarg, &c, 10);
 524                         if (!optarg[0] || *c || raiddisks<=0) {
 525                                 fprintf(stderr, Name ": invalid number of raid devices: %s\n",
 526                                         optarg);
 527                                 exit(2);
 528                         }
 529                         ident.raid_disks = raiddisks;
 530                         continue;
 531
 532                 case O(CREATE,'x'): /* number of spare (eXtra) discs */
 533                         if (sparedisks) {
 534                                 fprintf(stderr,Name ": spare-devices set twice: %d and %s\n",
 535                                         sparedisks, optarg);
 536                                 exit(2);
 537                         }
 538                         if (level != UnSet && level <= 0 && level >= -1) {
 539                                 fprintf(stderr, Name ": spare-devices setting is incompatible with raid level %d\n",
 540                                         level);
 541                                 exit(2);
 542                         }
 543                         sparedisks = strtol(optarg, &c, 10);
 544                         if (!optarg[0] || *c || sparedisks < 0) {
 545                                 fprintf(stderr, Name ": invalid number of spare-devices: %s\n",
 546                                         optarg);
 547                                 exit(2);
 548                         }
 549                         continue;
 550
 551                 case O(CREATE,'a'):
 552                 case O(BUILD,'a'):
 553                 case O(INCREMENTAL,'a'):
 554                 case O(ASSEMBLE,'a'): /* auto-creation of device node */
 555                         autof = parse_auto(optarg, "--auto flag", 0);
 556                         continue;
 557
 558                 case O(CREATE,Symlinks):
 559                 case O(BUILD,Symlinks):
 560                 case O(ASSEMBLE,Symlinks): /* auto creation of symlinks in /dev to /dev/md */
 561                         symlinks = optarg;
 562                         continue;
 563
 564                 case O(BUILD,'f'): /* force honouring '-n 1' */
 565                 case O(GROW,'f'): /* ditto */
 566                 case O(CREATE,'f'): /* force honouring of device list */
 567                 case O(ASSEMBLE,'f'): /* force assembly */
 568                 case O(MISC,'f'): /* force zero */
 569                         force=1;
 570                         continue;
 571
 572                         /* now for the Assemble options */
 573                 case O(CREATE,'u'): /* uuid of array */
 574                 case O(ASSEMBLE,'u'): /* uuid of array */
 575                         if (ident.uuid_set) {
 576                                 fprintf(stderr, Name ": uuid cannot be set twice.  "
 577                                         "Second value %s.\n", optarg);
 578                                 exit(2);
 579                         }
 580                         if (parse_uuid(optarg, ident.uuid))
 581                                 ident.uuid_set = 1;
 582                         else {
 583                                 fprintf(stderr,Name ": Bad uuid: %s\n", optarg);
 584                                 exit(2);
 585                         }
 586                         continue;
 587
 588                 case O(CREATE,'N'):
 589                 case O(ASSEMBLE,'N'):
 590                         if (ident.name[0]) {
 591                                 fprintf(stderr, Name ": name cannot be set twice.   "
 592                                         "Second value %s.\n", optarg);
 593                                 exit(2);
 594                         }
 595                         if (strlen(optarg) > 32) {
 596                                 fprintf(stderr, Name ": name '%s' is too long, 32 chars max.\n",
 597                                         optarg);
 598                                 exit(2);
 599                         }
 600                         strcpy(ident.name, optarg);
 601                         continue;
 602
 603                 case O(ASSEMBLE,'m'): /* super-minor for array */
 604                         if (ident.super_minor != UnSet) {
 605                                 fprintf(stderr, Name ": super-minor cannot be set twice.  "
 606                                         "Second value: %s.\n", optarg);
 607                                 exit(2);
 608                         }
 609                         if (strcmp(optarg, "dev")==0)
 610                                 ident.super_minor = -2;
 611                         else {
 612                                 ident.super_minor = strtoul(optarg, &cp, 10);
 613                                 if (!optarg[0] || *cp) {
 614                                         fprintf(stderr, Name ": Bad super-minor number: %s.\n", optarg);
 615                                         exit(2);
 616                                 }
 617                         }
 618                         continue;
 619
 620                 case O(ASSEMBLE,'U'): /* update the superblock */
 621                         if (update) {
 622                                 fprintf(stderr, Name ": Can only update one aspect of superblock, both %s and %s given.\n",
 623                                         update, optarg);
 624                                 exit(2);
 625                         }
 626                         update = optarg;
 627                         if (strcmp(update, "sparc2.2")==0)
 628                                 continue;
 629                         if (strcmp(update, "super-minor") == 0)
 630                                 continue;
 631                         if (strcmp(update, "summaries")==0)
 632                                 continue;
 633                         if (strcmp(update, "resync")==0)
 634                                 continue;
 635                         if (strcmp(update, "uuid")==0)
 636                                 continue;
 637                         if (strcmp(update, "name")==0)
 638                                 continue;
 639                         if (strcmp(update, "homehost")==0)
 640                                 continue;
 641                         if (strcmp(update, "devicesize")==0)
 642                                 continue;
 643                         if (strcmp(update, "byteorder")==0) {
 644                                 if (ss) {
 645                                         fprintf(stderr, Name ": must not set metadata type with --update=byteorder.\n");
 646                                         exit(2);
 647                                 }
 648                                 for(i=0; !ss && superlist[i]; i++)
 649                                         ss = superlist[i]->match_metadata_desc("0.swap");
 650                                 if (!ss) {
 651                                         fprintf(stderr, Name ": INTERNAL ERROR cannot find 0.swap\n");
 652                                         exit(2);
 653                                 }
 654
 655                                 continue;
 656                         }
 657                         if (strcmp(update,"?") == 0 ||
 658                             strcmp(update, "help") == 0) {
 659                                 outf = stdout;
 660                                 fprintf(outf, Name ": ");
 661                         } else {
 662                                 outf = stderr;
 663                                 fprintf(outf,
 664                                         Name ": '--update=%s' is invalid.  ",
 665                                         update);
 666                         }
 667                         fprintf(outf, "Valid --update options are:\n"
 668                 "     'sparc2.2', 'super-minor', 'uuid', 'name', 'resync',\n"
 669                 "     'summaries', 'homehost', 'byteorder', 'devicesize'.\n");
 670                         exit(outf == stdout ? 0 : 2);
 671
 672                 case O(INCREMENTAL,NoDegraded):
 673                 case O(ASSEMBLE,NoDegraded): /* --no-degraded */
 674                         runstop = -1; /* --stop isn't allowed for --assemble,
 675                                        * so we overload slightly */
 676                         continue;
 677
 678                 case O(ASSEMBLE,'c'): /* config file */
 679                 case O(INCREMENTAL, 'c'):
 680                 case O(MISC, 'c'):
 681                 case O(MONITOR,'c'):
 682                         if (configfile) {
 683                                 fprintf(stderr, Name ": configfile cannot be set twice.  "
 684                                         "Second value is %s.\n", optarg);
 685                                 exit(2);
 686                         }
 687                         configfile = optarg;
 688                         set_conffile(configfile);
 689                         /* FIXME possibly check that config file exists.  Even parse it */
 690                         continue;
 691                 case O(ASSEMBLE,'s'): /* scan */
 692                 case O(MISC,'s'):
 693                 case O(MONITOR,'s'):
 694                 case O(INCREMENTAL,'s'):
 695                         scan = 1;
 696                         continue;
 697
 698                 case O(MONITOR,'m'): /* mail address */
 699                         if (mailaddr)
 700                                 fprintf(stderr, Name ": only specify one mailaddress. %s ignored.\n",
 701                                         optarg);
 702                         else
 703                                 mailaddr = optarg;
 704                         continue;
 705
 706                 case O(MONITOR,'p'): /* alert program */
 707                         if (program)
 708                                 fprintf(stderr, Name ": only specify one alter program. %s ignored.\n",
 709                                         optarg);
 710                         else
 711                                 program = optarg;
 712                         continue;
 713
 714                 case O(MONITOR,'d'): /* delay in seconds */
 715                 case O(GROW, 'd'):
 716                 case O(BUILD,'d'): /* delay for bitmap updates */
 717                 case O(CREATE,'d'):
 718                         if (delay)
 719                                 fprintf(stderr, Name ": only specify delay once. %s ignored.\n",
 720                                         optarg);
 721                         else {
 722                                 delay = strtol(optarg, &c, 10);
 723                                 if (!optarg[0] || *c || delay<1) {
 724                                         fprintf(stderr, Name ": invalid delay: %s\n",
 725                                                 optarg);
 726                                         exit(2);
 727                                 }
 728                         }
 729                         continue;
 730                 case O(MONITOR,'f'): /* daemonise */
 731                         daemonise = 1;
 732                         continue;
 733                 case O(MONITOR,'i'): /* pid */
 734                         if (pidfile)
 735                                 fprintf(stderr, Name ": only specify one pid file. %s ignored.\n",
 736                                         optarg);
 737                         else
 738                                 pidfile = optarg;
 739                         continue;
 740                 case O(MONITOR,'1'): /* oneshot */
 741                         oneshot = 1;
 742                         continue;
 743                 case O(MONITOR,'t'): /* test */
 744                         test = 1;
 745                         continue;
 746                 case O(MONITOR,'y'): /* log messages to syslog */
 747                         openlog("mdadm", LOG_PID, SYSLOG_FACILITY);
 748                         dosyslog = 1;
 749                         continue;
 750
 751                         /* now the general management options.  Some are applicable
 752                          * to other modes. None have arguments.
 753                          */
 754                 case O(GROW,'a'):
 755                 case O(MANAGE,'a'): /* add a drive */
 756                         devmode = 'a';
 757                         re_add = 0;
 758                         continue;
 759                 case O(MANAGE,ReAdd):
 760                         devmode = 'a';
 761                         re_add = 1;
 762                         continue;
 763                 case O(MANAGE,'r'): /* remove a drive */
 764                         devmode = 'r';
 765                         continue;
 766                 case O(MANAGE,'f'): /* set faulty */
 767                         devmode = 'f';
 768                         continue;
 769                 case O(INCREMENTAL,'R'):
 770                 case O(MANAGE,'R'):
 771                 case O(ASSEMBLE,'R'):
 772                 case O(BUILD,'R'):
 773                 case O(CREATE,'R'): /* Run the array */
 774                         if (runstop < 0) {
 775                                 fprintf(stderr, Name ": Cannot both Stop and Run an array\n");
 776                                 exit(2);
 777                         }
 778                         runstop = 1;
 779                         continue;
 780                 case O(MANAGE,'S'):
 781                         if (runstop > 0) {
 782                                 fprintf(stderr, Name ": Cannot both Run and Stop an array\n");
 783                                 exit(2);
 784                         }
 785                         runstop = -1;
 786                         continue;
 787
 788                 case O(MISC,'Q'):
 789                 case O(MISC,'D'):
 790                 case O(MISC,'E'):
 791                 case O(MISC,'K'):
 792                 case O(MISC,'R'):
 793                 case O(MISC,'S'):
 794                 case O(MISC,'X'):
 795                 case O(MISC,'o'):
 796                 case O(MISC,'w'):
 797                 case O(MISC,'W'):
 798                 case O(MISC, Waitclean):
 799                 case O(MISC, DetailPlatform):
 800                         if (devmode && devmode != opt &&
 801                             (devmode == 'E' || (opt == 'E' && devmode != 'Q'))) {
 802                                 fprintf(stderr, Name ": --examine/-E cannot be given with -%c\n",
 803                                         devmode =='E'?opt:devmode);
 804                                 exit(2);
 805                         }
 806                         devmode = opt;
 807                         continue;
 808                 case O(MISC,'t'):
 809                         test = 1;
 810                         continue;
 811
 812                 case O(MISC, Sparc22):
 813                         if (devmode != 'E') {
 814                                 fprintf(stderr, Name ": --sparc2.2 only allowed with --examine\n");
 815                                 exit(2);
 816                         }
 817                         SparcAdjust = 1;
 818                         continue;
 819
 820                 case O(ASSEMBLE,'b'): /* here we simply set the bitmap file */
 821                         if (!optarg) {
 822                                 fprintf(stderr, Name ": bitmap file needed with -b in --assemble mode\n");
 823                                 exit(2);
 824                         }
 825                         if (strcmp(optarg, "internal")==0) {
 826                                 fprintf(stderr, Name ": there is no need to specify --bitmap when assembling arrays with internal bitmaps\n");
 827                                 continue;
 828                         }
 829                         bitmap_fd = open(optarg, O_RDWR);
 830                         if (!*optarg || bitmap_fd < 0) {
 831                                 fprintf(stderr, Name ": cannot open bitmap file %s: %s\n", optarg, strerror(errno));
 832                                 exit(2);
 833                         }
 834                         ident.bitmap_fd = bitmap_fd; /* for Assemble */
 835                         continue;
 836
 837                 case O(ASSEMBLE, BackupFile):
 838                 case O(GROW, BackupFile):
 839                         /* Specify a file into which grow might place a backup,
 840                          * or from which assemble might recover a backup
 841                          */
 842                         if (backup_file) {
 843                                 fprintf(stderr, Name ": backup file already specified, rejecting %s\n", optarg);
 844                                 exit(2);
 845                         }
 846                         backup_file = optarg;
 847                         continue;
 848
 849                 case O(BUILD,'b'):
 850                 case O(CREATE,'b'): /* here we create the bitmap */
 851                         if (strcmp(optarg, "none") == 0) {
 852                                 fprintf(stderr, Name ": '--bitmap none' only"
 853                                         " support for --grow\n");
 854                                 exit(2);
 855                         }
 856                         /* FALL THROUGH */
 857                 case O(GROW,'b'):
 858                         if (strcmp(optarg, "internal")== 0 ||
 859                             strcmp(optarg, "none")== 0 ||
 860                             strchr(optarg, '/') != NULL) {
 861                                 bitmap_file = optarg;
 862                                 continue;
 863                         }
 864                         /* probable typo */
 865                         fprintf(stderr, Name ": bitmap file must contain a '/', or be 'internal', or 'none'\n");
 866                         exit(2);
 867
 868                 case O(GROW,BitmapChunk):
 869                 case O(BUILD,BitmapChunk):
 870                 case O(CREATE,BitmapChunk): /* bitmap chunksize */
 871                         bitmap_chunk = strtol(optarg, &c, 10);
 872                         if (!optarg[0] || *c || bitmap_chunk < 0 ||
 873                                         bitmap_chunk & (bitmap_chunk - 1)) {
 874                                 fprintf(stderr, Name ": invalid bitmap chunksize: %s\n",
 875                                                 optarg);
 876                                 exit(2);
 877                         }
 878                         /* convert K to B, chunk of 0K means 512B */
 879                         bitmap_chunk = bitmap_chunk ? bitmap_chunk * 1024 : 512;
 880                         continue;
 881
 882                 case O(GROW, WriteBehind):
 883                 case O(BUILD, WriteBehind):
 884                 case O(CREATE, WriteBehind): /* write-behind mode */
 885                         write_behind = DEFAULT_MAX_WRITE_BEHIND;
 886                         if (optarg) {
 887                                 write_behind = strtol(optarg, &c, 10);
 888                                 if (write_behind < 0 || *c ||
 889                                     write_behind > 16383) {
 890                                         fprintf(stderr, Name ": Invalid value for maximum outstanding write-behind writes: %s.\n\tMust be between 0 and 16383.\n", optarg);
 891                                         exit(2);
 892                                 }
 893                         }
 894                         continue;
 895
 896                 case O(INCREMENTAL, 'r'):
 897                         rebuild_map = 1;
 898                         continue;
 899                 }
 900                 /* We have now processed all the valid options. Anything else is
 901                  * an error
 902                  */
 903                 if (option_index > 0)
 904                         fprintf(stderr, Name ":option --%s not valid in %s mode\n",
 905                                 long_options[option_index].name,
 906                                 map_num(modes, mode));
 907                 else
 908                         fprintf(stderr, Name ": option -%c not valid in %s mode\n",
 909                                 opt, map_num(modes, mode));
 910                 exit(2);
 911
 912         }
 913
 914         if (print_help) {
 915                 char *help_text = Help;
 916                 if (print_help == 2)
 917                         help_text = OptionHelp;
 918                 else
 919                         switch (mode) {
 920                         case ASSEMBLE : help_text = Help_assemble; break;
 921                         case BUILD    : help_text = Help_build; break;
 922                         case CREATE   : help_text = Help_create; break;
 923                         case MANAGE   : help_text = Help_manage; break;
 924                         case MISC     : help_text = Help_misc; break;
 925                         case MONITOR  : help_text = Help_monitor; break;
 926                         case GROW     : help_text = Help_grow; break;
 927                         case INCREMENTAL:help_text= Help_incr; break;
 928                         }
 929                 fputs(help_text,stdout);
 930                 exit(0);
 931         }
 932
 933         if (!mode && devs_found) {
 934                 mode = MISC;
 935                 devmode = 'Q';
 936                 if (devlist->disposition == 0)
 937                         devlist->disposition = devmode;
 938         }
 939         if (!mode) {
 940                 fputs(Usage, stderr);
 941                 exit(2);
 942         }
 943
 944         if (symlinks) {
 945                 struct createinfo *ci = conf_get_create_info();
 946
 947                 if (strcasecmp(symlinks, "yes") == 0)
 948                         ci->symlinks = 1;
 949                 else if (strcasecmp(symlinks, "no") == 0)
 950                         ci->symlinks = 0;
 951                 else {
 952                         fprintf(stderr, Name ": option --symlinks must be 'no' or 'yes'\n");
 953                         exit(2);
 954                 }
 955         }
 956         /* Ok, got the option parsing out of the way
 957          * hopefully it's mostly right but there might be some stuff
 958          * missing
 959          *
 960          * That is mosty checked in the per-mode stuff but...
 961          *
 962          * For @,B,C  and A without -s, the first device listed must be an md device
 963          * we check that here and open it.
 964          */
 965
 966         if (mode==MANAGE || mode == BUILD || mode == CREATE || mode == GROW ||
 967             (mode == ASSEMBLE && ! scan)) {
 968                 if (devs_found < 1) {
 969                         fprintf(stderr, Name ": an md device must be given in this mode\n");
 970                         exit(2);
 971                 }
 972                 if ((int)ident.super_minor == -2 && autof) {
 973                         fprintf(stderr, Name ": --super-minor=dev is incompatible with --auto\n");
 974                         exit(2);
 975                 }
 976                 if (mode == MANAGE || mode == GROW) {
 977                         mdfd = open_mddev(devlist->devname, 1);
 978                         if (mdfd < 0)
 979                                 exit(1);
 980                 } else
 981                         /* non-existent device is OK */
 982                         mdfd = open_mddev(devlist->devname, 0);
 983                 if (mdfd == -2) {
 984                         fprintf(stderr, Name ": device %s exists but is not an "
 985                                 "md array.\n", devlist->devname);
 986                         exit(1);
 987                 }
 988                 if ((int)ident.super_minor == -2) {
 989                         struct stat stb;
 990                         if (mdfd < 0) {
 991                                 fprintf(stderr, Name ": --super-minor=dev given, and "
 992                                         "listed device %s doesn't exist.\n",
 993                                         devlist->devname);
 994                                 exit(1);
 995                         }
 996                         fstat(mdfd, &stb);
 997                         ident.super_minor = minor(stb.st_rdev);
 998                 }
 999                 if (mdfd >= 0 && mode != MANAGE && mode != GROW) {
1000                         /* We don't really want this open yet, we just might
1001                          * have wanted to check some things
1002                          */
1003                         close(mdfd);
1004                         mdfd = -1;
1005                 }
1006         }
1007
1008         if (raiddisks) {
1009                 if (raiddisks > max_disks) {
1010                         fprintf(stderr, Name ": invalid number of raid devices: %d\n",
1011                                 raiddisks);
1012                         exit(2);
1013                 }
1014                 if (raiddisks == 1 &&  !force && level != -5) {
1015                         fprintf(stderr, Name ": '1' is an unusual number of drives for an array, so it is probably\n"
1016                                 "     a mistake.  If you really mean it you will need to specify --force before\n"
1017                                 "     setting the number of drives.\n");
1018                         exit(2);
1019                 }
1020         }
1021         if (sparedisks) {
1022                 if ( sparedisks > max_disks - raiddisks) {
1023                         fprintf(stderr, Name ": invalid number of spare-devices: %d\n",
1024                                 sparedisks);
1025                         exit(2);
1026                 }
1027         }
1028
1029         if (homehost == NULL)
1030                 homehost = conf_get_homehost(&require_homehost);
1031         if (homehost == NULL || strcmp(homehost, "<system>")==0) {
1032                 if (gethostname(sys_hostname, sizeof(sys_hostname)) == 0) {
1033                         sys_hostname[sizeof(sys_hostname)-1] = 0;
1034                         homehost = sys_hostname;
1035                 }
1036         }
1037
1038         ident.autof = autof;
1039
1040         rv = 0;
1041         switch(mode) {
1042         case MANAGE:
1043                 /* readonly, add/remove, readwrite, runstop */
1044                 if (readonly>0)
1045                         rv = Manage_ro(devlist->devname, mdfd, readonly);
1046                 if (!rv && devs_found>1)
1047                         rv = Manage_subdevs(devlist->devname, mdfd,
1048                                             devlist->next, verbose-quiet);
1049                 if (!rv && readonly < 0)
1050                         rv = Manage_ro(devlist->devname, mdfd, readonly);
1051                 if (!rv && runstop)
1052                         rv = Manage_runstop(devlist->devname, mdfd, runstop, quiet);
1053                 break;
1054         case ASSEMBLE:
1055                 if (devs_found == 1 && ident.uuid_set == 0 &&
1056                     ident.super_minor == UnSet && ident.name[0] == 0 && !scan ) {
1057                         /* Only a device has been given, so get details from config file */
1058                         mddev_ident_t array_ident = conf_get_ident(devlist->devname);
1059                         if (array_ident == NULL) {
1060                                 fprintf(stderr, Name ": %s not identified in config file.\n",
1061                                         devlist->devname);
1062                                 rv |= 1;
1063                                 if (mdfd >= 0)
1064                                         close(mdfd);
1065                         } else {
1066                                 if (array_ident->autof == 0)
1067                                         array_ident->autof = autof;
1068                                 rv |= Assemble(ss, devlist->devname, array_ident,
1069                                                NULL, backup_file,
1070                                                readonly, runstop, update,
1071                                                homehost, require_homehost,
1072                                                verbose-quiet, force);
1073                         }
1074                 } else if (!scan)
1075                         rv = Assemble(ss, devlist->devname, &ident,
1076                                       devlist->next, backup_file,
1077                                       readonly, runstop, update,
1078                                       homehost, require_homehost,
1079                                       verbose-quiet, force);
1080                 else if (devs_found>0) {
1081                         if (update && devs_found > 1) {
1082                                 fprintf(stderr, Name ": can only update a single array at a time\n");
1083                                 exit(1);
1084                         }
1085                         if (backup_file && devs_found > 1) {
1086                                 fprintf(stderr, Name ": can only assemble a single array when providing a backup file.\n");
1087                                 exit(1);
1088                         }
1089                         for (dv = devlist ; dv ; dv=dv->next) {
1090                                 mddev_ident_t array_ident = conf_get_ident(dv->devname);
1091                                 if (array_ident == NULL) {
1092                                         fprintf(stderr, Name ": %s not identified in config file.\n",
1093                                                 dv->devname);
1094                                         rv |= 1;
1095                                         continue;
1096                                 }
1097                                 if (array_ident->autof == 0)
1098                                         array_ident->autof = autof;
1099                                 rv |= Assemble(ss, dv->devname, array_ident,
1100                                                NULL, backup_file,
1101                                                readonly, runstop, update,
1102                                                homehost, require_homehost,
1103                                                verbose-quiet, force);
1104                         }
1105                 } else {
1106                         mddev_ident_t array_list =  conf_get_ident(NULL);
1107                         mddev_dev_t devlist = conf_get_devs();
1108                         int cnt = 0;
1109                         if (devlist == NULL) {
1110                                 fprintf(stderr, Name ": No devices listed in conf file were found.\n");
1111                                 exit(1);
1112                         }
1113                         if (update) {
1114                                 fprintf(stderr, Name ": --update not meaningful with a --scan assembly.\n");
1115                                 exit(1);
1116                         }
1117                         if (backup_file) {
1118                                 fprintf(stderr, Name ": --backup_file not meaningful with a --scan assembly.\n");
1119                                 exit(1);
1120                         }
1121                         for (; array_list; array_list = array_list->next) {
1122                                 if (array_list->devname &&
1123                                     strcasecmp(array_list->devname, "<ignore>") == 0)
1124                                         continue;
1125                                 if (array_list->autof == 0)
1126                                         array_list->autof = autof;
1127
1128                                 rv |= Assemble(ss, array_list->devname,
1129                                                array_list,
1130                                                NULL, NULL,
1131                                                readonly, runstop, NULL,
1132                                                homehost, require_homehost,
1133                                                verbose-quiet, force);
1134                                 cnt++;
1135                         }
1136                         if (homehost && cnt == 0) {
1137                                 /* Maybe we can auto-assemble something.
1138                                  * Repeatedly call Assemble in auto-assemble mode
1139                                  * until it fails
1140                                  */
1141                                 int rv2;
1142                                 int acnt;
1143                                 ident.autof = autof;
1144                                 do {
1145                                         mddev_dev_t devlist = conf_get_devs();
1146                                         acnt = 0;
1147                                         do {
1148                                                 rv2 = Assemble(ss, NULL,
1149                                                                &ident,
1150                                                                devlist, NULL,
1151                                                                readonly, runstop, NULL,
1152                                                                homehost, require_homehost,
1153                                                                verbose-quiet, force);
1154                                                 if (rv2==0) {
1155                                                         cnt++;
1156                                                         acnt++;
1157                                                 }
1158                                                 if (rv2 == 1)
1159                                                         /* found something so even though assembly failed  we
1160                                                          * want to avoid auto-updates
1161                                                          */
1162                                                         auto_update_home = 0;
1163                                         } while (rv2!=2);
1164                                         /* Incase there are stacked devices, we need to go around again */
1165                                 } while (acnt);
1166                                 if (cnt == 0 && auto_update_home && homehost) {
1167                                         /* Nothing found, maybe we need to bootstrap homehost info */
1168                                         do {
1169                                                 acnt = 0;
1170                                                 do {
1171                                                         rv2 = Assemble(ss, NULL,
1172                                                                        &ident,
1173                                                                        NULL, NULL,
1174                                                                        readonly, runstop, "homehost",
1175                                                                        homehost, require_homehost,
1176                                                                        verbose-quiet, force);
1177                                                         if (rv2==0) {
1178                                                                 cnt++;
1179                                                                 acnt++;
1180                                                         }
1181                                                 } while (rv2!=2);
1182                                                 /* Incase there are stacked devices, we need to go around again */
1183                                         } while (acnt);
1184                                 }
1185                                 if (cnt == 0 && rv == 0) {
1186                                         fprintf(stderr, Name ": No arrays found in config file or automatically\n");
1187                                         rv = 1;
1188                                 } else if (cnt)
1189                                         rv = 0;
1190                         } else if (cnt == 0 && rv == 0) {
1191                                 fprintf(stderr, Name ": No arrays found in config file\n");
1192                                 rv = 1;
1193                         }
1194                 }
1195                 break;
1196         case BUILD:
1197                 if (delay == 0) delay = DEFAULT_BITMAP_DELAY;
1198                 if (write_behind && !bitmap_file) {
1199                         fprintf(stderr, Name ": write-behind mode requires a bitmap.\n");
1200                         rv = 1;
1201                         break;
1202                 }
1203                 if (raiddisks == 0) {
1204                         fprintf(stderr, Name ": no raid-devices specified.\n");
1205                         rv = 1;
1206                         break;
1207                 }
1208
1209                 if (bitmap_file) {
1210                         if (strcmp(bitmap_file, "internal")==0) {
1211                                 fprintf(stderr, Name ": 'internal' bitmaps not supported with --build\n");
1212                                 rv |= 1;
1213                                 break;
1214                         }
1215                 }
1216                 rv = Build(devlist->devname, chunk, level, layout,
1217                            raiddisks, devlist->next, assume_clean,
1218                            bitmap_file, bitmap_chunk, write_behind,
1219                            delay, verbose-quiet, autof, size);
1220                 break;
1221         case CREATE:
1222                 if (delay == 0) delay = DEFAULT_BITMAP_DELAY;
1223                 if (write_behind && !bitmap_file) {
1224                         fprintf(stderr, Name ": write-behind mode requires a bitmap.\n");
1225                         rv = 1;
1226                         break;
1227                 }
1228                 if (raiddisks == 0) {
1229                         fprintf(stderr, Name ": no raid-devices specified.\n");
1230                         rv = 1;
1231                         break;
1232                 }
1233
1234                 rv = Create(ss, devlist->devname, chunk, level, layout, size<0 ? 0 : size,
1235                             raiddisks, sparedisks, ident.name, homehost,
1236                             ident.uuid_set ? ident.uuid : NULL,
1237                             devs_found-1, devlist->next, runstop, verbose-quiet, force, assume_clean,
1238                             bitmap_file, bitmap_chunk, write_behind, delay, autof);
1239                 break;
1240         case MISC:
1241                 if (devmode == 'E') {
1242                         if (devlist == NULL && !scan) {
1243                                 fprintf(stderr, Name ": No devices to examine\n");
1244                                 exit(2);
1245                         }
1246                         if (devlist == NULL)
1247                                 devlist = conf_get_devs();
1248                         if (devlist == NULL) {
1249                                 fprintf(stderr, Name ": No devices listed in %s\n", configfile?configfile:DefaultConfFile);
1250                                 exit(1);
1251                         }
1252                         if (brief && verbose)
1253                                 brief = 2;
1254                         rv = Examine(devlist, scan?(verbose>1?0:verbose+1):brief,
1255                                      export, scan,
1256                                      SparcAdjust, ss, homehost);
1257                 } else if (devmode == DetailPlatform) {
1258                         rv = Detail_Platform(ss ? ss->ss : NULL, ss ? scan : 1, verbose);
1259                 } else {
1260                         if (devlist == NULL) {
1261                                 if ((devmode=='D' || devmode == Waitclean) && scan) {
1262                                         /* apply --detail or --wait-clean to
1263                                          * all devices in /proc/mdstat
1264                                          */
1265                                         struct mdstat_ent *ms = mdstat_read(0, 1);
1266                                         struct mdstat_ent *e;
1267                                         struct map_ent *map = NULL;
1268                                         int v = verbose>1?0:verbose+1;
1269
1270                                         for (e=ms ; e ; e=e->next) {
1271                                                 char *name;
1272                                                 struct map_ent *me;
1273                                                 me = map_by_devnum(&map, e->devnum);
1274                                                 if (me && me->path
1275                                                     && strcmp(me->path, "/unknown") != 0)
1276                                                         name = me->path;
1277                                                 else
1278                                                         name = get_md_name(e->devnum);
1279
1280                                                 if (!name) {
1281                                                         fprintf(stderr, Name ": cannot find device file for %s\n",
1282                                                                 e->dev);
1283                                                         continue;
1284                                                 }
1285                                                 if (devmode == 'D')
1286                                                         rv |= Detail(name, v,
1287                                                                      export, test,
1288                                                                      homehost);
1289                                                 else
1290                                                         rv |= WaitClean(name, v);
1291                                                 put_md_name(name);
1292                                         }
1293                                         free_mdstat(ms);
1294                                 } else  if (devmode == 'S' && scan) {
1295                                         /* apply --stop to all devices in /proc/mdstat */
1296                                         /* Due to possible stacking of devices, repeat until
1297                                          * nothing more can be stopped
1298                                          */
1299                                         int progress=1, err;
1300                                         int last = 0;
1301                                         do {
1302                                                 struct mdstat_ent *ms = mdstat_read(0, 0);
1303                                                 struct mdstat_ent *e;
1304
1305                                                 if (!progress) last = 1;
1306                                                 progress = 0; err = 0;
1307                                                 for (e=ms ; e ; e=e->next) {
1308                                                         char *name = get_md_name(e->devnum);
1309
1310                                                         if (!name) {
1311                                                                 fprintf(stderr, Name ": cannot find device file for %s\n",
1312                                                                         e->dev);
1313                                                                 continue;
1314                                                         }
1315                                                         mdfd = open_mddev(name, 1);
1316                                                         if (mdfd >= 0) {
1317                                                                 if (Manage_runstop(name, mdfd, -1, quiet?1:last?0:-1))
1318                                                                         err = 1;
1319                                                                 else
1320                                                                         progress = 1;
1321                                                                 close(mdfd);
1322                                                         }
1323
1324                                                         put_md_name(name);
1325                                                 }
1326                                                 free_mdstat(ms);
1327                                         } while (!last && err);
1328                                         if (err) rv |= 1;
1329                                 } else {
1330                                         fprintf(stderr, Name ": No devices given.\n");
1331                                         exit(2);
1332                                 }
1333                         }
1334                         for (dv=devlist ; dv; dv=dv->next) {
1335                                 switch(dv->disposition) {
1336                                 case 'D':
1337                                         rv |= Detail(dv->devname,
1338                                                      brief?1+verbose:0,
1339                                                      export, test, homehost);
1340                                         continue;
1341                                 case 'K': /* Zero superblock */
1342                                         rv |= Kill(dv->devname, force, quiet,0);
1343                                         continue;
1344                                 case 'Q':
1345                                         rv |= Query(dv->devname); continue;
1346                                 case 'X':
1347                                         rv |= ExamineBitmap(dv->devname, brief, ss); continue;
1348                                 case 'W':
1349                                         rv |= Wait(dv->devname); continue;
1350                                 case Waitclean:
1351                                         rv |= WaitClean(dv->devname, verbose-quiet); continue;
1352                                 }
1353                                 mdfd = open_mddev(dv->devname, 1);
1354                                 if (mdfd>=0) {
1355                                         switch(dv->disposition) {
1356                                         case 'R':
1357                                                 rv |= Manage_runstop(dv->devname, mdfd, 1, quiet); break;
1358                                         case 'S':
1359                                                 rv |= Manage_runstop(dv->devname, mdfd, -1, quiet); break;
1360                                         case 'o':
1361                                                 rv |= Manage_ro(dv->devname, mdfd, 1); break;
1362                                         case 'w':
1363                                                 rv |= Manage_ro(dv->devname, mdfd, -1); break;
1364                                         }
1365                                         close(mdfd);
1366                                 } else
1367                                         rv |= 1;
1368                         }
1369                 }
1370                 break;
1371         case MONITOR:
1372                 if (!devlist && !scan) {
1373                         fprintf(stderr, Name ": Cannot monitor: need --scan or at least one device\n");
1374                         rv = 1;
1375                         break;
1376                 }
1377                 if (pidfile && !daemonise) {
1378                         fprintf(stderr, Name ": Cannot write a pid file when not in daemon mode\n");
1379                         rv = 1;
1380                         break;
1381                 }
1382                 rv= Monitor(devlist, mailaddr, program,
1383                             delay?delay:60, daemonise, scan, oneshot,
1384                             dosyslog, test, pidfile);
1385                 break;
1386
1387         case GROW:
1388                 if (array_size >= 0) {
1389                         /* alway impose array size first, independent of
1390                          * anything else
1391                          */
1392                         struct mdinfo sra;
1393                         int err;
1394                         sysfs_init(&sra, mdfd, 0);
1395                         if (array_size == 0)
1396                                 err = sysfs_set_str(&sra, NULL, "array_size", "default");
1397                         else
1398                                 err = sysfs_set_num(&sra, NULL, "array_size", array_size / 2);
1399                         if (err < 0) {
1400                                 if (errno == E2BIG)
1401                                         fprintf(stderr, Name ": --array-size setting"
1402                                                 " is too large.\n");
1403                                 else
1404                                         fprintf(stderr, Name ": current kernel does"
1405                                                 " not support setting --array-size\n");
1406                                 rv = 1;
1407                                 break;
1408                         }
1409                 }
1410                 if (devs_found > 1) {
1411
1412                         /* must be '-a'. */
1413                         if (size >= 0 || raiddisks) {
1414                                 fprintf(stderr, Name ": --size, --raiddisks, and --add are exclusing in --grow mode\n");
1415                                 rv = 1;
1416                                 break;
1417                         }
1418                         for (dv=devlist->next; dv ; dv=dv->next) {
1419                                 rv = Grow_Add_device(devlist->devname, mdfd, dv->devname);
1420                                 if (rv)
1421                                         break;
1422                         }
1423                 } else if ((size >= 0) + (raiddisks != 0) +  (layout_str != NULL) + (bitmap_file != NULL)> 1) {
1424                         fprintf(stderr, Name ": can change at most one of size, raiddisks, bitmap, and layout\n");
1425                         rv = 1;
1426                         break;
1427                 } else if (size >= 0 || raiddisks || layout_str != NULL)
1428                         rv = Grow_reshape(devlist->devname, mdfd, quiet, backup_file,
1429                                           size, level, layout_str, chunk, raiddisks);
1430                 else if (bitmap_file) {
1431                         if (delay == 0) delay = DEFAULT_BITMAP_DELAY;
1432                         rv = Grow_addbitmap(devlist->devname, mdfd, bitmap_file,
1433                                             bitmap_chunk, delay, write_behind, force);
1434                 } else if (array_size < 0)
1435                         fprintf(stderr, Name ": no changes to --grow\n");
1436                 break;
1437         case INCREMENTAL:
1438                 if (rebuild_map) {
1439                         RebuildMap();
1440                 }
1441                 if (scan) {
1442                         if (runstop <= 0) {
1443                                 fprintf(stderr, Name
1444                          ": --incremental --scan meaningless without --run.\n");
1445                                 break;
1446                         }
1447                         rv = IncrementalScan(verbose);
1448                 }
1449                 if (!devlist) {
1450                         if (!rebuild_map && !scan) {
1451                                 fprintf(stderr, Name
1452                                         ": --incremental requires a device.\n");
1453                                 rv = 1;
1454                         }
1455                         break;
1456                 }
1457                 if (devlist->next) {
1458                         fprintf(stderr, Name
1459                                ": --incremental can only handle one device.\n");
1460                         rv = 1;
1461                         break;
1462                 }
1463                 rv = Incremental(devlist->devname, verbose-quiet, runstop,
1464                                  ss, homehost, require_homehost, autof);
1465                 break;
1466         case AUTODETECT:
1467                 autodetect();
1468                 break;
1469         }
1470         exit(rv);
1471 }