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 = parse_size(optarg);
 393                                 if (size < 8) {
 394                                         fprintf(stderr, Name ": invalid size: %s\n",
 395                                                 optarg);
 396                                         exit(2);
 397                                 }
 398                                 /* convert sectors to K */
 399                                 size /= 2;
 400                         }
 401                         continue;
 402
 403                 case O(GROW,'Z'): /* array size */
 404                         if (array_size >= 0) {
 405                                 fprintf(stderr, Name ": array-size may only be specified once. "
 406                                         "Second value is %s.\n", optarg);
 407                                 exit(2);
 408                         }
 409                         if (strcmp(optarg, "max") == 0)
 410                                 array_size = 0;
 411                         else {
 412                                 array_size = parse_size(optarg);
 413                                 if (array_size <= 0) {
 414                                         fprintf(stderr, Name ": invalid array size: %s\n",
 415                                                 optarg);
 416                                         exit(2);
 417                                 }
 418                         }
 419                         continue;
 420
 421                 case O(GROW,'l'): /* hack - needed to understand layout */
 422                 case O(CREATE,'l'):
 423                 case O(BUILD,'l'): /* set raid level*/
 424                         if (level != UnSet) {
 425                                 fprintf(stderr, Name ": raid level may only be set once.  "
 426                                         "Second value is %s.\n", optarg);
 427                                 exit(2);
 428                         }
 429                         level = map_name(pers, optarg);
 430                         if (level == UnSet) {
 431                                 fprintf(stderr, Name ": invalid raid level: %s\n",
 432                                         optarg);
 433                                 exit(2);
 434                         }
 435                         if (level != 0 && level != -1 && level != 1 && level != -4 && level != -5 && mode == BUILD) {
 436                                 fprintf(stderr, Name ": Raid level %s not permitted with --build.\n",
 437                                         optarg);
 438                                 exit(2);
 439                         }
 440                         if (sparedisks > 0 && level < 1 && level >= -1) {
 441                                 fprintf(stderr, Name ": raid level %s is incompatible with spare-devices setting.\n",
 442                                         optarg);
 443                                 exit(2);
 444                         }
 445                         ident.level = level;
 446                         continue;
 447
 448                 case O(GROW, 'p'): /* new layout */
 449                         if (layout_str) {
 450                                 fprintf(stderr,Name ": layout may only be sent once.  "
 451                                         "Second value was %s\n", optarg);
 452                                 exit(2);
 453                         }
 454                         layout_str = optarg;
 455                         /* 'Grow' will parse the value */
 456                         continue;
 457
 458                 case O(CREATE,'p'): /* raid5 layout */
 459                 case O(BUILD,'p'): /* faulty layout */
 460                         if (layout != UnSet) {
 461                                 fprintf(stderr,Name ": layout may only be sent once.  "
 462                                         "Second value was %s\n", optarg);
 463                                 exit(2);
 464                         }
 465                         switch(level) {
 466                         default:
 467                                 fprintf(stderr, Name ": layout not meaningful for %s arrays.\n",
 468                                         map_num(pers, level));
 469                                 exit(2);
 470                         case UnSet:
 471                                 fprintf(stderr, Name ": raid level must be given before layout.\n");
 472                                 exit(2);
 473
 474                         case 5:
 475                                 layout = map_name(r5layout, optarg);
 476                                 if (layout==UnSet) {
 477                                         fprintf(stderr, Name ": layout %s not understood for raid5.\n",
 478                                                 optarg);
 479                                         exit(2);
 480                                 }
 481                                 break;
 482                         case 6:
 483                                 layout = map_name(r6layout, optarg);
 484                                 if (layout==UnSet) {
 485                                         fprintf(stderr, Name ": layout %s not understood for raid6.\n",
 486                                                 optarg);
 487                                         exit(2);
 488                                 }
 489                                 break;
 490
 491                         case 10:
 492                                 layout = parse_layout_10(optarg);
 493                                 if (layout < 0) {
 494                                         fprintf(stderr, Name ": layout for raid10 must be 'nNN', 'oNN' or 'fNN' where NN is a number, not %s\n", optarg);
 495                                         exit(2);
 496                                 }
 497                                 break;
 498                         case LEVEL_FAULTY:
 499                                 /* Faulty
 500                                  * modeNNN
 501                                  */
 502                                 layout = parse_layout_faulty(optarg);
 503                                 if (layout == -1) {
 504                                         fprintf(stderr, Name ": layout %s not understood for faulty.\n",
 505                                                 optarg);
 506                                         exit(2);
 507                                 }
 508                                 break;
 509                         }
 510                         continue;
 511
 512                 case O(CREATE,AssumeClean):
 513                 case O(BUILD,AssumeClean): /* assume clean */
 514                         assume_clean = 1;
 515                         continue;
 516
 517                 case O(GROW,'n'):
 518                 case O(CREATE,'n'):
 519                 case O(BUILD,'n'): /* number of raid disks */
 520                         if (raiddisks) {
 521                                 fprintf(stderr, Name ": raid-devices set twice: %d and %s\n",
 522                                         raiddisks, optarg);
 523                                 exit(2);
 524                         }
 525                         raiddisks = strtol(optarg, &c, 10);
 526                         if (!optarg[0] || *c || raiddisks<=0) {
 527                                 fprintf(stderr, Name ": invalid number of raid devices: %s\n",
 528                                         optarg);
 529                                 exit(2);
 530                         }
 531                         ident.raid_disks = raiddisks;
 532                         continue;
 533
 534                 case O(CREATE,'x'): /* number of spare (eXtra) discs */
 535                         if (sparedisks) {
 536                                 fprintf(stderr,Name ": spare-devices set twice: %d and %s\n",
 537                                         sparedisks, optarg);
 538                                 exit(2);
 539                         }
 540                         if (level != UnSet && level <= 0 && level >= -1) {
 541                                 fprintf(stderr, Name ": spare-devices setting is incompatible with raid level %d\n",
 542                                         level);
 543                                 exit(2);
 544                         }
 545                         sparedisks = strtol(optarg, &c, 10);
 546                         if (!optarg[0] || *c || sparedisks < 0) {
 547                                 fprintf(stderr, Name ": invalid number of spare-devices: %s\n",
 548                                         optarg);
 549                                 exit(2);
 550                         }
 551                         continue;
 552
 553                 case O(CREATE,'a'):
 554                 case O(BUILD,'a'):
 555                 case O(INCREMENTAL,'a'):
 556                 case O(ASSEMBLE,'a'): /* auto-creation of device node */
 557                         autof = parse_auto(optarg, "--auto flag", 0);
 558                         continue;
 559
 560                 case O(CREATE,Symlinks):
 561                 case O(BUILD,Symlinks):
 562                 case O(ASSEMBLE,Symlinks): /* auto creation of symlinks in /dev to /dev/md */
 563                         symlinks = optarg;
 564                         continue;
 565
 566                 case O(BUILD,'f'): /* force honouring '-n 1' */
 567                 case O(GROW,'f'): /* ditto */
 568                 case O(CREATE,'f'): /* force honouring of device list */
 569                 case O(ASSEMBLE,'f'): /* force assembly */
 570                 case O(MISC,'f'): /* force zero */
 571                         force=1;
 572                         continue;
 573
 574                         /* now for the Assemble options */
 575                 case O(CREATE,'u'): /* uuid of array */
 576                 case O(ASSEMBLE,'u'): /* uuid of array */
 577                         if (ident.uuid_set) {
 578                                 fprintf(stderr, Name ": uuid cannot be set twice.  "
 579                                         "Second value %s.\n", optarg);
 580                                 exit(2);
 581                         }
 582                         if (parse_uuid(optarg, ident.uuid))
 583                                 ident.uuid_set = 1;
 584                         else {
 585                                 fprintf(stderr,Name ": Bad uuid: %s\n", optarg);
 586                                 exit(2);
 587                         }
 588                         continue;
 589
 590                 case O(CREATE,'N'):
 591                 case O(ASSEMBLE,'N'):
 592                         if (ident.name[0]) {
 593                                 fprintf(stderr, Name ": name cannot be set twice.   "
 594                                         "Second value %s.\n", optarg);
 595                                 exit(2);
 596                         }
 597                         if (strlen(optarg) > 32) {
 598                                 fprintf(stderr, Name ": name '%s' is too long, 32 chars max.\n",
 599                                         optarg);
 600                                 exit(2);
 601                         }
 602                         strcpy(ident.name, optarg);
 603                         continue;
 604
 605                 case O(ASSEMBLE,'m'): /* super-minor for array */
 606                         if (ident.super_minor != UnSet) {
 607                                 fprintf(stderr, Name ": super-minor cannot be set twice.  "
 608                                         "Second value: %s.\n", optarg);
 609                                 exit(2);
 610                         }
 611                         if (strcmp(optarg, "dev")==0)
 612                                 ident.super_minor = -2;
 613                         else {
 614                                 ident.super_minor = strtoul(optarg, &cp, 10);
 615                                 if (!optarg[0] || *cp) {
 616                                         fprintf(stderr, Name ": Bad super-minor number: %s.\n", optarg);
 617                                         exit(2);
 618                                 }
 619                         }
 620                         continue;
 621
 622                 case O(ASSEMBLE,'U'): /* update the superblock */
 623                         if (update) {
 624                                 fprintf(stderr, Name ": Can only update one aspect of superblock, both %s and %s given.\n",
 625                                         update, optarg);
 626                                 exit(2);
 627                         }
 628                         update = optarg;
 629                         if (strcmp(update, "sparc2.2")==0)
 630                                 continue;
 631                         if (strcmp(update, "super-minor") == 0)
 632                                 continue;
 633                         if (strcmp(update, "summaries")==0)
 634                                 continue;
 635                         if (strcmp(update, "resync")==0)
 636                                 continue;
 637                         if (strcmp(update, "uuid")==0)
 638                                 continue;
 639                         if (strcmp(update, "name")==0)
 640                                 continue;
 641                         if (strcmp(update, "homehost")==0)
 642                                 continue;
 643                         if (strcmp(update, "devicesize")==0)
 644                                 continue;
 645                         if (strcmp(update, "byteorder")==0) {
 646                                 if (ss) {
 647                                         fprintf(stderr, Name ": must not set metadata type with --update=byteorder.\n");
 648                                         exit(2);
 649                                 }
 650                                 for(i=0; !ss && superlist[i]; i++)
 651                                         ss = superlist[i]->match_metadata_desc("0.swap");
 652                                 if (!ss) {
 653                                         fprintf(stderr, Name ": INTERNAL ERROR cannot find 0.swap\n");
 654                                         exit(2);
 655                                 }
 656
 657                                 continue;
 658                         }
 659                         if (strcmp(update,"?") == 0 ||
 660                             strcmp(update, "help") == 0) {
 661                                 outf = stdout;
 662                                 fprintf(outf, Name ": ");
 663                         } else {
 664                                 outf = stderr;
 665                                 fprintf(outf,
 666                                         Name ": '--update=%s' is invalid.  ",
 667                                         update);
 668                         }
 669                         fprintf(outf, "Valid --update options are:\n"
 670                 "     'sparc2.2', 'super-minor', 'uuid', 'name', 'resync',\n"
 671                 "     'summaries', 'homehost', 'byteorder', 'devicesize'.\n");
 672                         exit(outf == stdout ? 0 : 2);
 673
 674                 case O(INCREMENTAL,NoDegraded):
 675                 case O(ASSEMBLE,NoDegraded): /* --no-degraded */
 676                         runstop = -1; /* --stop isn't allowed for --assemble,
 677                                        * so we overload slightly */
 678                         continue;
 679
 680                 case O(ASSEMBLE,'c'): /* config file */
 681                 case O(INCREMENTAL, 'c'):
 682                 case O(MISC, 'c'):
 683                 case O(MONITOR,'c'):
 684                         if (configfile) {
 685                                 fprintf(stderr, Name ": configfile cannot be set twice.  "
 686                                         "Second value is %s.\n", optarg);
 687                                 exit(2);
 688                         }
 689                         configfile = optarg;
 690                         set_conffile(configfile);
 691                         /* FIXME possibly check that config file exists.  Even parse it */
 692                         continue;
 693                 case O(ASSEMBLE,'s'): /* scan */
 694                 case O(MISC,'s'):
 695                 case O(MONITOR,'s'):
 696                 case O(INCREMENTAL,'s'):
 697                         scan = 1;
 698                         continue;
 699
 700                 case O(MONITOR,'m'): /* mail address */
 701                         if (mailaddr)
 702                                 fprintf(stderr, Name ": only specify one mailaddress. %s ignored.\n",
 703                                         optarg);
 704                         else
 705                                 mailaddr = optarg;
 706                         continue;
 707
 708                 case O(MONITOR,'p'): /* alert program */
 709                         if (program)
 710                                 fprintf(stderr, Name ": only specify one alter program. %s ignored.\n",
 711                                         optarg);
 712                         else
 713                                 program = optarg;
 714                         continue;
 715
 716                 case O(MONITOR,'d'): /* delay in seconds */
 717                 case O(GROW, 'd'):
 718                 case O(BUILD,'d'): /* delay for bitmap updates */
 719                 case O(CREATE,'d'):
 720                         if (delay)
 721                                 fprintf(stderr, Name ": only specify delay once. %s ignored.\n",
 722                                         optarg);
 723                         else {
 724                                 delay = strtol(optarg, &c, 10);
 725                                 if (!optarg[0] || *c || delay<1) {
 726                                         fprintf(stderr, Name ": invalid delay: %s\n",
 727                                                 optarg);
 728                                         exit(2);
 729                                 }
 730                         }
 731                         continue;
 732                 case O(MONITOR,'f'): /* daemonise */
 733                         daemonise = 1;
 734                         continue;
 735                 case O(MONITOR,'i'): /* pid */
 736                         if (pidfile)
 737                                 fprintf(stderr, Name ": only specify one pid file. %s ignored.\n",
 738                                         optarg);
 739                         else
 740                                 pidfile = optarg;
 741                         continue;
 742                 case O(MONITOR,'1'): /* oneshot */
 743                         oneshot = 1;
 744                         continue;
 745                 case O(MONITOR,'t'): /* test */
 746                         test = 1;
 747                         continue;
 748                 case O(MONITOR,'y'): /* log messages to syslog */
 749                         openlog("mdadm", LOG_PID, SYSLOG_FACILITY);
 750                         dosyslog = 1;
 751                         continue;
 752
 753                         /* now the general management options.  Some are applicable
 754                          * to other modes. None have arguments.
 755                          */
 756                 case O(GROW,'a'):
 757                 case O(MANAGE,'a'): /* add a drive */
 758                         devmode = 'a';
 759                         re_add = 0;
 760                         continue;
 761                 case O(MANAGE,ReAdd):
 762                         devmode = 'a';
 763                         re_add = 1;
 764                         continue;
 765                 case O(MANAGE,'r'): /* remove a drive */
 766                         devmode = 'r';
 767                         continue;
 768                 case O(MANAGE,'f'): /* set faulty */
 769                         devmode = 'f';
 770                         continue;
 771                 case O(INCREMENTAL,'R'):
 772                 case O(MANAGE,'R'):
 773                 case O(ASSEMBLE,'R'):
 774                 case O(BUILD,'R'):
 775                 case O(CREATE,'R'): /* Run the array */
 776                         if (runstop < 0) {
 777                                 fprintf(stderr, Name ": Cannot both Stop and Run an array\n");
 778                                 exit(2);
 779                         }
 780                         runstop = 1;
 781                         continue;
 782                 case O(MANAGE,'S'):
 783                         if (runstop > 0) {
 784                                 fprintf(stderr, Name ": Cannot both Run and Stop an array\n");
 785                                 exit(2);
 786                         }
 787                         runstop = -1;
 788                         continue;
 789
 790                 case O(MISC,'Q'):
 791                 case O(MISC,'D'):
 792                 case O(MISC,'E'):
 793                 case O(MISC,'K'):
 794                 case O(MISC,'R'):
 795                 case O(MISC,'S'):
 796                 case O(MISC,'X'):
 797                 case O(MISC,'o'):
 798                 case O(MISC,'w'):
 799                 case O(MISC,'W'):
 800                 case O(MISC, Waitclean):
 801                 case O(MISC, DetailPlatform):
 802                         if (devmode && devmode != opt &&
 803                             (devmode == 'E' || (opt == 'E' && devmode != 'Q'))) {
 804                                 fprintf(stderr, Name ": --examine/-E cannot be given with -%c\n",
 805                                         devmode =='E'?opt:devmode);
 806                                 exit(2);
 807                         }
 808                         devmode = opt;
 809                         continue;
 810                 case O(MISC,'t'):
 811                         test = 1;
 812                         continue;
 813
 814                 case O(MISC, Sparc22):
 815                         if (devmode != 'E') {
 816                                 fprintf(stderr, Name ": --sparc2.2 only allowed with --examine\n");
 817                                 exit(2);
 818                         }
 819                         SparcAdjust = 1;
 820                         continue;
 821
 822                 case O(ASSEMBLE,'b'): /* here we simply set the bitmap file */
 823                         if (!optarg) {
 824                                 fprintf(stderr, Name ": bitmap file needed with -b in --assemble mode\n");
 825                                 exit(2);
 826                         }
 827                         if (strcmp(optarg, "internal")==0) {
 828                                 fprintf(stderr, Name ": there is no need to specify --bitmap when assembling arrays with internal bitmaps\n");
 829                                 continue;
 830                         }
 831                         bitmap_fd = open(optarg, O_RDWR);
 832                         if (!*optarg || bitmap_fd < 0) {
 833                                 fprintf(stderr, Name ": cannot open bitmap file %s: %s\n", optarg, strerror(errno));
 834                                 exit(2);
 835                         }
 836                         ident.bitmap_fd = bitmap_fd; /* for Assemble */
 837                         continue;
 838
 839                 case O(ASSEMBLE, BackupFile):
 840                 case O(GROW, BackupFile):
 841                         /* Specify a file into which grow might place a backup,
 842                          * or from which assemble might recover a backup
 843                          */
 844                         if (backup_file) {
 845                                 fprintf(stderr, Name ": backup file already specified, rejecting %s\n", optarg);
 846                                 exit(2);
 847                         }
 848                         backup_file = optarg;
 849                         continue;
 850
 851                 case O(BUILD,'b'):
 852                 case O(CREATE,'b'): /* here we create the bitmap */
 853                         if (strcmp(optarg, "none") == 0) {
 854                                 fprintf(stderr, Name ": '--bitmap none' only"
 855                                         " support for --grow\n");
 856                                 exit(2);
 857                         }
 858                         /* FALL THROUGH */
 859                 case O(GROW,'b'):
 860                         if (strcmp(optarg, "internal")== 0 ||
 861                             strcmp(optarg, "none")== 0 ||
 862                             strchr(optarg, '/') != NULL) {
 863                                 bitmap_file = optarg;
 864                                 continue;
 865                         }
 866                         /* probable typo */
 867                         fprintf(stderr, Name ": bitmap file must contain a '/', or be 'internal', or 'none'\n");
 868                         exit(2);
 869
 870                 case O(GROW,BitmapChunk):
 871                 case O(BUILD,BitmapChunk):
 872                 case O(CREATE,BitmapChunk): /* bitmap chunksize */
 873                         bitmap_chunk = strtol(optarg, &c, 10);
 874                         if (!optarg[0] || *c || bitmap_chunk < 0 ||
 875                                         bitmap_chunk & (bitmap_chunk - 1)) {
 876                                 fprintf(stderr, Name ": invalid bitmap chunksize: %s\n",
 877                                                 optarg);
 878                                 exit(2);
 879                         }
 880                         /* convert K to B, chunk of 0K means 512B */
 881                         bitmap_chunk = bitmap_chunk ? bitmap_chunk * 1024 : 512;
 882                         continue;
 883
 884                 case O(GROW, WriteBehind):
 885                 case O(BUILD, WriteBehind):
 886                 case O(CREATE, WriteBehind): /* write-behind mode */
 887                         write_behind = DEFAULT_MAX_WRITE_BEHIND;
 888                         if (optarg) {
 889                                 write_behind = strtol(optarg, &c, 10);
 890                                 if (write_behind < 0 || *c ||
 891                                     write_behind > 16383) {
 892                                         fprintf(stderr, Name ": Invalid value for maximum outstanding write-behind writes: %s.\n\tMust be between 0 and 16383.\n", optarg);
 893                                         exit(2);
 894                                 }
 895                         }
 896                         continue;
 897
 898                 case O(INCREMENTAL, 'r'):
 899                         rebuild_map = 1;
 900                         continue;
 901                 }
 902                 /* We have now processed all the valid options. Anything else is
 903                  * an error
 904                  */
 905                 if (option_index > 0)
 906                         fprintf(stderr, Name ":option --%s not valid in %s mode\n",
 907                                 long_options[option_index].name,
 908                                 map_num(modes, mode));
 909                 else
 910                         fprintf(stderr, Name ": option -%c not valid in %s mode\n",
 911                                 opt, map_num(modes, mode));
 912                 exit(2);
 913
 914         }
 915
 916         if (print_help) {
 917                 char *help_text = Help;
 918                 if (print_help == 2)
 919                         help_text = OptionHelp;
 920                 else
 921                         switch (mode) {
 922                         case ASSEMBLE : help_text = Help_assemble; break;
 923                         case BUILD    : help_text = Help_build; break;
 924                         case CREATE   : help_text = Help_create; break;
 925                         case MANAGE   : help_text = Help_manage; break;
 926                         case MISC     : help_text = Help_misc; break;
 927                         case MONITOR  : help_text = Help_monitor; break;
 928                         case GROW     : help_text = Help_grow; break;
 929                         case INCREMENTAL:help_text= Help_incr; break;
 930                         }
 931                 fputs(help_text,stdout);
 932                 exit(0);
 933         }
 934
 935         if (!mode && devs_found) {
 936                 mode = MISC;
 937                 devmode = 'Q';
 938                 if (devlist->disposition == 0)
 939                         devlist->disposition = devmode;
 940         }
 941         if (!mode) {
 942                 fputs(Usage, stderr);
 943                 exit(2);
 944         }
 945
 946         if (symlinks) {
 947                 struct createinfo *ci = conf_get_create_info();
 948
 949                 if (strcasecmp(symlinks, "yes") == 0)
 950                         ci->symlinks = 1;
 951                 else if (strcasecmp(symlinks, "no") == 0)
 952                         ci->symlinks = 0;
 953                 else {
 954                         fprintf(stderr, Name ": option --symlinks must be 'no' or 'yes'\n");
 955                         exit(2);
 956                 }
 957         }
 958         /* Ok, got the option parsing out of the way
 959          * hopefully it's mostly right but there might be some stuff
 960          * missing
 961          *
 962          * That is mosty checked in the per-mode stuff but...
 963          *
 964          * For @,B,C  and A without -s, the first device listed must be an md device
 965          * we check that here and open it.
 966          */
 967
 968         if (mode==MANAGE || mode == BUILD || mode == CREATE || mode == GROW ||
 969             (mode == ASSEMBLE && ! scan)) {
 970                 if (devs_found < 1) {
 971                         fprintf(stderr, Name ": an md device must be given in this mode\n");
 972                         exit(2);
 973                 }
 974                 if ((int)ident.super_minor == -2 && autof) {
 975                         fprintf(stderr, Name ": --super-minor=dev is incompatible with --auto\n");
 976                         exit(2);
 977                 }
 978                 if (mode == MANAGE || mode == GROW) {
 979                         mdfd = open_mddev(devlist->devname, 1);
 980                         if (mdfd < 0)
 981                                 exit(1);
 982                 } else
 983                         /* non-existent device is OK */
 984                         mdfd = open_mddev(devlist->devname, 0);
 985                 if (mdfd == -2) {
 986                         fprintf(stderr, Name ": device %s exists but is not an "
 987                                 "md array.\n", devlist->devname);
 988                         exit(1);
 989                 }
 990                 if ((int)ident.super_minor == -2) {
 991                         struct stat stb;
 992                         if (mdfd < 0) {
 993                                 fprintf(stderr, Name ": --super-minor=dev given, and "
 994                                         "listed device %s doesn't exist.\n",
 995                                         devlist->devname);
 996                                 exit(1);
 997                         }
 998                         fstat(mdfd, &stb);
 999                         ident.super_minor = minor(stb.st_rdev);
1000                 }
1001                 if (mdfd >= 0 && mode != MANAGE && mode != GROW) {
1002                         /* We don't really want this open yet, we just might
1003                          * have wanted to check some things
1004                          */
1005                         close(mdfd);
1006                         mdfd = -1;
1007                 }
1008         }
1009
1010         if (raiddisks) {
1011                 if (raiddisks > max_disks) {
1012                         fprintf(stderr, Name ": invalid number of raid devices: %d\n",
1013                                 raiddisks);
1014                         exit(2);
1015                 }
1016                 if (raiddisks == 1 &&  !force && level != -5) {
1017                         fprintf(stderr, Name ": '1' is an unusual number of drives for an array, so it is probably\n"
1018                                 "     a mistake.  If you really mean it you will need to specify --force before\n"
1019                                 "     setting the number of drives.\n");
1020                         exit(2);
1021                 }
1022         }
1023         if (sparedisks) {
1024                 if ( sparedisks > max_disks - raiddisks) {
1025                         fprintf(stderr, Name ": invalid number of spare-devices: %d\n",
1026                                 sparedisks);
1027                         exit(2);
1028                 }
1029         }
1030
1031         if (homehost == NULL)
1032                 homehost = conf_get_homehost(&require_homehost);
1033         if (homehost == NULL || strcmp(homehost, "<system>")==0) {
1034                 if (gethostname(sys_hostname, sizeof(sys_hostname)) == 0) {
1035                         sys_hostname[sizeof(sys_hostname)-1] = 0;
1036                         homehost = sys_hostname;
1037                 }
1038         }
1039
1040         ident.autof = autof;
1041
1042         rv = 0;
1043         switch(mode) {
1044         case MANAGE:
1045                 /* readonly, add/remove, readwrite, runstop */
1046                 if (readonly>0)
1047                         rv = Manage_ro(devlist->devname, mdfd, readonly);
1048                 if (!rv && devs_found>1)
1049                         rv = Manage_subdevs(devlist->devname, mdfd,
1050                                             devlist->next, verbose-quiet);
1051                 if (!rv && readonly < 0)
1052                         rv = Manage_ro(devlist->devname, mdfd, readonly);
1053                 if (!rv && runstop)
1054                         rv = Manage_runstop(devlist->devname, mdfd, runstop, quiet);
1055                 break;
1056         case ASSEMBLE:
1057                 if (devs_found == 1 && ident.uuid_set == 0 &&
1058                     ident.super_minor == UnSet && ident.name[0] == 0 && !scan ) {
1059                         /* Only a device has been given, so get details from config file */
1060                         mddev_ident_t array_ident = conf_get_ident(devlist->devname);
1061                         if (array_ident == NULL) {
1062                                 fprintf(stderr, Name ": %s not identified in config file.\n",
1063                                         devlist->devname);
1064                                 rv |= 1;
1065                                 if (mdfd >= 0)
1066                                         close(mdfd);
1067                         } else {
1068                                 if (array_ident->autof == 0)
1069                                         array_ident->autof = autof;
1070                                 rv |= Assemble(ss, devlist->devname, array_ident,
1071                                                NULL, backup_file,
1072                                                readonly, runstop, update,
1073                                                homehost, require_homehost,
1074                                                verbose-quiet, force);
1075                         }
1076                 } else if (!scan)
1077                         rv = Assemble(ss, devlist->devname, &ident,
1078                                       devlist->next, backup_file,
1079                                       readonly, runstop, update,
1080                                       homehost, require_homehost,
1081                                       verbose-quiet, force);
1082                 else if (devs_found>0) {
1083                         if (update && devs_found > 1) {
1084                                 fprintf(stderr, Name ": can only update a single array at a time\n");
1085                                 exit(1);
1086                         }
1087                         if (backup_file && devs_found > 1) {
1088                                 fprintf(stderr, Name ": can only assemble a single array when providing a backup file.\n");
1089                                 exit(1);
1090                         }
1091                         for (dv = devlist ; dv ; dv=dv->next) {
1092                                 mddev_ident_t array_ident = conf_get_ident(dv->devname);
1093                                 if (array_ident == NULL) {
1094                                         fprintf(stderr, Name ": %s not identified in config file.\n",
1095                                                 dv->devname);
1096                                         rv |= 1;
1097                                         continue;
1098                                 }
1099                                 if (array_ident->autof == 0)
1100                                         array_ident->autof = autof;
1101                                 rv |= Assemble(ss, dv->devname, array_ident,
1102                                                NULL, backup_file,
1103                                                readonly, runstop, update,
1104                                                homehost, require_homehost,
1105                                                verbose-quiet, force);
1106                         }
1107                 } else {
1108                         mddev_ident_t array_list =  conf_get_ident(NULL);
1109                         mddev_dev_t devlist = conf_get_devs();
1110                         int cnt = 0;
1111                         if (devlist == NULL) {
1112                                 fprintf(stderr, Name ": No devices listed in conf file were found.\n");
1113                                 exit(1);
1114                         }
1115                         if (update) {
1116                                 fprintf(stderr, Name ": --update not meaningful with a --scan assembly.\n");
1117                                 exit(1);
1118                         }
1119                         if (backup_file) {
1120                                 fprintf(stderr, Name ": --backup_file not meaningful with a --scan assembly.\n");
1121                                 exit(1);
1122                         }
1123                         for (; array_list; array_list = array_list->next) {
1124                                 if (array_list->devname &&
1125                                     strcasecmp(array_list->devname, "<ignore>") == 0)
1126                                         continue;
1127                                 if (array_list->autof == 0)
1128                                         array_list->autof = autof;
1129
1130                                 rv |= Assemble(ss, array_list->devname,
1131                                                array_list,
1132                                                NULL, NULL,
1133                                                readonly, runstop, NULL,
1134                                                homehost, require_homehost,
1135                                                verbose-quiet, force);
1136                                 cnt++;
1137                         }
1138                         if (homehost && cnt == 0) {
1139                                 /* Maybe we can auto-assemble something.
1140                                  * Repeatedly call Assemble in auto-assemble mode
1141                                  * until it fails
1142                                  */
1143                                 int rv2;
1144                                 int acnt;
1145                                 ident.autof = autof;
1146                                 do {
1147                                         mddev_dev_t devlist = conf_get_devs();
1148                                         acnt = 0;
1149                                         do {
1150                                                 rv2 = Assemble(ss, NULL,
1151                                                                &ident,
1152                                                                devlist, NULL,
1153                                                                readonly, runstop, NULL,
1154                                                                homehost, require_homehost,
1155                                                                verbose-quiet, force);
1156                                                 if (rv2==0) {
1157                                                         cnt++;
1158                                                         acnt++;
1159                                                 }
1160                                                 if (rv2 == 1)
1161                                                         /* found something so even though assembly failed  we
1162                                                          * want to avoid auto-updates
1163                                                          */
1164                                                         auto_update_home = 0;
1165                                         } while (rv2!=2);
1166                                         /* Incase there are stacked devices, we need to go around again */
1167                                 } while (acnt);
1168                                 if (cnt == 0 && auto_update_home && homehost) {
1169                                         /* Nothing found, maybe we need to bootstrap homehost info */
1170                                         do {
1171                                                 acnt = 0;
1172                                                 do {
1173                                                         rv2 = Assemble(ss, NULL,
1174                                                                        &ident,
1175                                                                        NULL, NULL,
1176                                                                        readonly, runstop, "homehost",
1177                                                                        homehost, require_homehost,
1178                                                                        verbose-quiet, force);
1179                                                         if (rv2==0) {
1180                                                                 cnt++;
1181                                                                 acnt++;
1182                                                         }
1183                                                 } while (rv2!=2);
1184                                                 /* Incase there are stacked devices, we need to go around again */
1185                                         } while (acnt);
1186                                 }
1187                                 if (cnt == 0 && rv == 0) {
1188                                         fprintf(stderr, Name ": No arrays found in config file or automatically\n");
1189                                         rv = 1;
1190                                 } else if (cnt)
1191                                         rv = 0;
1192                         } else if (cnt == 0 && rv == 0) {
1193                                 fprintf(stderr, Name ": No arrays found in config file\n");
1194                                 rv = 1;
1195                         }
1196                 }
1197                 break;
1198         case BUILD:
1199                 if (delay == 0) delay = DEFAULT_BITMAP_DELAY;
1200                 if (write_behind && !bitmap_file) {
1201                         fprintf(stderr, Name ": write-behind mode requires a bitmap.\n");
1202                         rv = 1;
1203                         break;
1204                 }
1205                 if (raiddisks == 0) {
1206                         fprintf(stderr, Name ": no raid-devices specified.\n");
1207                         rv = 1;
1208                         break;
1209                 }
1210
1211                 if (bitmap_file) {
1212                         if (strcmp(bitmap_file, "internal")==0) {
1213                                 fprintf(stderr, Name ": 'internal' bitmaps not supported with --build\n");
1214                                 rv |= 1;
1215                                 break;
1216                         }
1217                 }
1218                 rv = Build(devlist->devname, chunk, level, layout,
1219                            raiddisks, devlist->next, assume_clean,
1220                            bitmap_file, bitmap_chunk, write_behind,
1221                            delay, verbose-quiet, autof, size);
1222                 break;
1223         case CREATE:
1224                 if (delay == 0) delay = DEFAULT_BITMAP_DELAY;
1225                 if (write_behind && !bitmap_file) {
1226                         fprintf(stderr, Name ": write-behind mode requires a bitmap.\n");
1227                         rv = 1;
1228                         break;
1229                 }
1230                 if (raiddisks == 0) {
1231                         fprintf(stderr, Name ": no raid-devices specified.\n");
1232                         rv = 1;
1233                         break;
1234                 }
1235
1236                 rv = Create(ss, devlist->devname, chunk, level, layout, size<0 ? 0 : size,
1237                             raiddisks, sparedisks, ident.name, homehost,
1238                             ident.uuid_set ? ident.uuid : NULL,
1239                             devs_found-1, devlist->next, runstop, verbose-quiet, force, assume_clean,
1240                             bitmap_file, bitmap_chunk, write_behind, delay, autof);
1241                 break;
1242         case MISC:
1243                 if (devmode == 'E') {
1244                         if (devlist == NULL && !scan) {
1245                                 fprintf(stderr, Name ": No devices to examine\n");
1246                                 exit(2);
1247                         }
1248                         if (devlist == NULL)
1249                                 devlist = conf_get_devs();
1250                         if (devlist == NULL) {
1251                                 fprintf(stderr, Name ": No devices listed in %s\n", configfile?configfile:DefaultConfFile);
1252                                 exit(1);
1253                         }
1254                         if (brief && verbose)
1255                                 brief = 2;
1256                         rv = Examine(devlist, scan?(verbose>1?0:verbose+1):brief,
1257                                      export, scan,
1258                                      SparcAdjust, ss, homehost);
1259                 } else if (devmode == DetailPlatform) {
1260                         rv = Detail_Platform(ss ? ss->ss : NULL, ss ? scan : 1, verbose);
1261                 } else {
1262                         if (devlist == NULL) {
1263                                 if ((devmode=='D' || devmode == Waitclean) && scan) {
1264                                         /* apply --detail or --wait-clean to
1265                                          * all devices in /proc/mdstat
1266                                          */
1267                                         struct mdstat_ent *ms = mdstat_read(0, 1);
1268                                         struct mdstat_ent *e;
1269                                         struct map_ent *map = NULL;
1270                                         int v = verbose>1?0:verbose+1;
1271
1272                                         for (e=ms ; e ; e=e->next) {
1273                                                 char *name;
1274                                                 struct map_ent *me;
1275                                                 me = map_by_devnum(&map, e->devnum);
1276                                                 if (me && me->path
1277                                                     && strcmp(me->path, "/unknown") != 0)
1278                                                         name = me->path;
1279                                                 else
1280                                                         name = get_md_name(e->devnum);
1281
1282                                                 if (!name) {
1283                                                         fprintf(stderr, Name ": cannot find device file for %s\n",
1284                                                                 e->dev);
1285                                                         continue;
1286                                                 }
1287                                                 if (devmode == 'D')
1288                                                         rv |= Detail(name, v,
1289                                                                      export, test,
1290                                                                      homehost);
1291                                                 else
1292                                                         rv |= WaitClean(name, v);
1293                                                 put_md_name(name);
1294                                         }
1295                                         free_mdstat(ms);
1296                                 } else  if (devmode == 'S' && scan) {
1297                                         /* apply --stop to all devices in /proc/mdstat */
1298                                         /* Due to possible stacking of devices, repeat until
1299                                          * nothing more can be stopped
1300                                          */
1301                                         int progress=1, err;
1302                                         int last = 0;
1303                                         do {
1304                                                 struct mdstat_ent *ms = mdstat_read(0, 0);
1305                                                 struct mdstat_ent *e;
1306
1307                                                 if (!progress) last = 1;
1308                                                 progress = 0; err = 0;
1309                                                 for (e=ms ; e ; e=e->next) {
1310                                                         char *name = get_md_name(e->devnum);
1311
1312                                                         if (!name) {
1313                                                                 fprintf(stderr, Name ": cannot find device file for %s\n",
1314                                                                         e->dev);
1315                                                                 continue;
1316                                                         }
1317                                                         mdfd = open_mddev(name, 1);
1318                                                         if (mdfd >= 0) {
1319                                                                 if (Manage_runstop(name, mdfd, -1, quiet?1:last?0:-1))
1320                                                                         err = 1;
1321                                                                 else
1322                                                                         progress = 1;
1323                                                                 close(mdfd);
1324                                                         }
1325
1326                                                         put_md_name(name);
1327                                                 }
1328                                                 free_mdstat(ms);
1329                                         } while (!last && err);
1330                                         if (err) rv |= 1;
1331                                 } else {
1332                                         fprintf(stderr, Name ": No devices given.\n");
1333                                         exit(2);
1334                                 }
1335                         }
1336                         for (dv=devlist ; dv; dv=dv->next) {
1337                                 switch(dv->disposition) {
1338                                 case 'D':
1339                                         rv |= Detail(dv->devname,
1340                                                      brief?1+verbose:0,
1341                                                      export, test, homehost);
1342                                         continue;
1343                                 case 'K': /* Zero superblock */
1344                                         rv |= Kill(dv->devname, force, quiet,0);
1345                                         continue;
1346                                 case 'Q':
1347                                         rv |= Query(dv->devname); continue;
1348                                 case 'X':
1349                                         rv |= ExamineBitmap(dv->devname, brief, ss); continue;
1350                                 case 'W':
1351                                         rv |= Wait(dv->devname); continue;
1352                                 case Waitclean:
1353                                         rv |= WaitClean(dv->devname, verbose-quiet); continue;
1354                                 }
1355                                 mdfd = open_mddev(dv->devname, 1);
1356                                 if (mdfd>=0) {
1357                                         switch(dv->disposition) {
1358                                         case 'R':
1359                                                 rv |= Manage_runstop(dv->devname, mdfd, 1, quiet); break;
1360                                         case 'S':
1361                                                 rv |= Manage_runstop(dv->devname, mdfd, -1, quiet); break;
1362                                         case 'o':
1363                                                 rv |= Manage_ro(dv->devname, mdfd, 1); break;
1364                                         case 'w':
1365                                                 rv |= Manage_ro(dv->devname, mdfd, -1); break;
1366                                         }
1367                                         close(mdfd);
1368                                 } else
1369                                         rv |= 1;
1370                         }
1371                 }
1372                 break;
1373         case MONITOR:
1374                 if (!devlist && !scan) {
1375                         fprintf(stderr, Name ": Cannot monitor: need --scan or at least one device\n");
1376                         rv = 1;
1377                         break;
1378                 }
1379                 if (pidfile && !daemonise) {
1380                         fprintf(stderr, Name ": Cannot write a pid file when not in daemon mode\n");
1381                         rv = 1;
1382                         break;
1383                 }
1384                 rv= Monitor(devlist, mailaddr, program,
1385                             delay?delay:60, daemonise, scan, oneshot,
1386                             dosyslog, test, pidfile);
1387                 break;
1388
1389         case GROW:
1390                 if (array_size >= 0) {
1391                         /* alway impose array size first, independent of
1392                          * anything else
1393                          */
1394                         struct mdinfo sra;
1395                         int err;
1396                         sysfs_init(&sra, mdfd, 0);
1397                         if (array_size == 0)
1398                                 err = sysfs_set_str(&sra, NULL, "array_size", "default");
1399                         else
1400                                 err = sysfs_set_num(&sra, NULL, "array_size", array_size / 2);
1401                         if (err < 0) {
1402                                 if (errno == E2BIG)
1403                                         fprintf(stderr, Name ": --array-size setting"
1404                                                 " is too large.\n");
1405                                 else
1406                                         fprintf(stderr, Name ": current kernel does"
1407                                                 " not support setting --array-size\n");
1408                                 rv = 1;
1409                                 break;
1410                         }
1411                 }
1412                 if (devs_found > 1) {
1413
1414                         /* must be '-a'. */
1415                         if (size >= 0 || raiddisks) {
1416                                 fprintf(stderr, Name ": --size, --raiddisks, and --add are exclusing in --grow mode\n");
1417                                 rv = 1;
1418                                 break;
1419                         }
1420                         for (dv=devlist->next; dv ; dv=dv->next) {
1421                                 rv = Grow_Add_device(devlist->devname, mdfd, dv->devname);
1422                                 if (rv)
1423                                         break;
1424                         }
1425                 } else if ((size >= 0) + (raiddisks != 0) +  (layout_str != NULL) + (bitmap_file != NULL)> 1) {
1426                         fprintf(stderr, Name ": can change at most one of size, raiddisks, bitmap, and layout\n");
1427                         rv = 1;
1428                         break;
1429                 } else if (size >= 0 || raiddisks || layout_str != NULL)
1430                         rv = Grow_reshape(devlist->devname, mdfd, quiet, backup_file,
1431                                           size, level, layout_str, chunk, raiddisks);
1432                 else if (bitmap_file) {
1433                         if (delay == 0) delay = DEFAULT_BITMAP_DELAY;
1434                         rv = Grow_addbitmap(devlist->devname, mdfd, bitmap_file,
1435                                             bitmap_chunk, delay, write_behind, force);
1436                 } else if (array_size < 0)
1437                         fprintf(stderr, Name ": no changes to --grow\n");
1438                 break;
1439         case INCREMENTAL:
1440                 if (rebuild_map) {
1441                         RebuildMap();
1442                 }
1443                 if (scan) {
1444                         if (runstop <= 0) {
1445                                 fprintf(stderr, Name
1446                          ": --incremental --scan meaningless without --run.\n");
1447                                 break;
1448                         }
1449                         rv = IncrementalScan(verbose);
1450                 }
1451                 if (!devlist) {
1452                         if (!rebuild_map && !scan) {
1453                                 fprintf(stderr, Name
1454                                         ": --incremental requires a device.\n");
1455                                 rv = 1;
1456                         }
1457                         break;
1458                 }
1459                 if (devlist->next) {
1460                         fprintf(stderr, Name
1461                                ": --incremental can only handle one device.\n");
1462                         rv = 1;
1463                         break;
1464                 }
1465                 rv = Incremental(devlist->devname, verbose-quiet, runstop,
1466                                  ss, homehost, require_homehost, autof);
1467                 break;
1468         case AUTODETECT:
1469                 autodetect();
1470                 break;
1471         }
1472         exit(rv);
1473 }