mdadm.c

   1 /*
   2  * mdadm - manage Linux "md" devices aka RAID arrays.
   3  *
   4  * Copyright (C) 2001-2002 Neil Brown <neilb@cse.unsw.edu.au>
   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
  30 #include "mdadm.h"
  31 #include "md_p.h"
  32
  33 int open_mddev(char *dev)
  34 {
  35         int mdfd = open(dev, O_RDWR, 0);
  36         if (mdfd < 0)
  37                 fprintf(stderr, Name ": error opening %s: %s\n",
  38                         dev, strerror(errno));
  39         else if (md_get_version(mdfd) <= 0) {
  40                 fprintf(stderr, Name ": %s does not appear to be an md device\n",
  41                         dev);
  42                 close(mdfd);
  43                 mdfd = -1;
  44         }
  45         return mdfd;
  46 }
  47
  48
  49
  50 int main(int argc, char *argv[])
  51 {
  52         int mode = 0;
  53         int opt;
  54         int option_index;
  55         char *help_text;
  56         char *c;
  57         int rv;
  58
  59         int chunk = 0;
  60         int size = 0;
  61         int level = -10;
  62         int layout = -1;
  63         int raiddisks = 0;
  64         int sparedisks = 0;
  65         struct mddev_ident_s ident;
  66         char *configfile = NULL;
  67         char *cp;
  68         char *update = NULL;
  69         int scan = 0;
  70         char devmode = 0;
  71         int runstop = 0;
  72         int readonly = 0;
  73         int SparcAdjust = 0;
  74         mddev_dev_t devlist = NULL;
  75         mddev_dev_t *devlistend = & devlist;
  76         mddev_dev_t dv;
  77         int devs_found = 0;
  78         int verbose = 0;
  79         int brief = 0;
  80         int force = 0;
  81         int test = 0;
  82
  83         char *mailaddr = NULL;
  84         char *program = NULL;
  85         int delay = 0;
  86         int daemonise = 0;
  87         int oneshot = 0;
  88
  89         int mdfd = -1;
  90
  91         ident.uuid_set=0;
  92         ident.level = -10;
  93         ident.raid_disks = -1;
  94         ident.super_minor= -1;
  95         ident.devices=0;
  96
  97         while ((option_index = -1) ,
  98                (opt=getopt_long(argc, argv,
  99                                 short_options, long_options,
 100                                 &option_index)) != -1) {
 101                 int newmode = mode;
 102                 /* firstly, so mode-independant options */
 103                 switch(opt) {
 104                 case 'h':
 105                         help_text = Help;
 106                         if (option_index > 0 &&
 107                             strcmp(long_options[option_index].name, "help-options")==0)
 108                                 help_text = OptionHelp;
 109                         else
 110                                 switch (mode) {
 111                                 case ASSEMBLE : help_text = Help_assemble; break;
 112                                 case BUILD    : help_text = Help_build; break;
 113                                 case CREATE   : help_text = Help_create; break;
 114                                 case MANAGE   : help_text = Help_manage; break;
 115                                 case MISC     : help_text = Help_misc; break;
 116                                 case MONITOR  : help_text = Help_monitor; break;
 117                                 }
 118                         fputs(help_text,stderr);
 119                         exit(0);
 120
 121                 case 'V':
 122                         fputs(Version, stderr);
 123                         exit(0);
 124
 125                 case 'v': verbose = 1;
 126                         continue;
 127
 128                 case 'b': brief = 1;
 129                         continue;
 130
 131                 case ':':
 132                 case '?':
 133                         fputs(Usage, stderr);
 134                         exit(2);
 135                 }
 136                 /* second, figure out the mode.
 137                  * Some options force the mode.  Others
 138                  * set the mode if it isn't already
 139                  */
 140
 141                 switch(opt) {
 142                 case '@': /* just incase they say --manage */
 143                         newmode = MANAGE; break;
 144                 case 'a':
 145                 case 'r':
 146                 case 'f':
 147                 case 1 : if (!mode) newmode = MANAGE; break;
 148
 149                 case 'A': newmode = ASSEMBLE; break;
 150                 case 'B': newmode = BUILD; break;
 151                 case 'C': newmode = CREATE; break;
 152                 case 'F': newmode = MONITOR;break;
 153
 154                 case '#':
 155                 case 'D':
 156                 case 'E':
 157                 case 'Q': newmode = MISC; break;
 158                 case 'R':
 159                 case 'S':
 160                 case 'o':
 161                 case 'w':
 162                 case 'K': if (!mode) newmode = MISC; break;
 163                 }
 164                 if (mode && newmode == mode) {
 165                         /* everybody happy ! */
 166                 } else if (mode && newmode != mode) {
 167                         /* not allowed.. */
 168                         fprintf(stderr, Name ": ");
 169                         if (option_index >= 0)
 170                                 fprintf(stderr, "--%s", long_options[option_index].name);
 171                         else
 172                                 fprintf(stderr, "-%c", opt);
 173                         fprintf(stderr, " would set mode to %s, but it is already %s.\n",
 174                                 map_num(modes, newmode),
 175                                 map_num(modes, mode));
 176                         exit(2);
 177                 } else if (!mode && newmode) {
 178                         mode = newmode;
 179                 } else {
 180                         /* special case of -c --help */
 181                         if (opt == 'c' &&
 182                             ( strncmp(optarg, "--h", 3)==0 ||
 183                               strncmp(optarg, "-h", 2)==0)) {
 184                                 fputs(Help_config, stderr);
 185                                 exit(0);
 186                         }
 187                         if (option_index >= 0)
 188                                 fprintf(stderr, "--%s", long_options[option_index].name);
 189                         else
 190                                 fprintf(stderr, "-%c", opt);
 191                         fprintf(stderr, " does not set the mode, and so cannot be first.\n");
 192                         exit(2);
 193                 }
 194
 195                 /* if we just set the mode, then done */
 196                 switch(opt) {
 197                 case '@':
 198                 case '#':
 199                 case 'A':
 200                 case 'B':
 201                 case 'C':
 202                 case 'F':
 203                         continue;
 204                 }
 205                 if (opt == 1) {
 206                         /* an undecorated option - must be a device name.
 207                          */
 208                         if (devs_found > 0 && mode == '@' && !devmode) {
 209                                 fprintf(stderr, Name ": Must give on of -a/-r/-f for subsequent devices at %s\n", optarg);
 210                                 exit(2);
 211                         }
 212                         dv = malloc(sizeof(*dv));
 213                         if (dv == NULL) {
 214                                 fprintf(stderr, Name ": malloc failed\n");
 215                                 exit(3);
 216                         }
 217                         dv->devname = optarg;
 218                         dv->disposition = devmode;
 219                         dv->next = NULL;
 220                         *devlistend = dv;
 221                         devlistend = &dv->next;
 222
 223                         devs_found++;
 224                         continue;
 225                 }
 226
 227                 /* We've got a mode, and opt is now something else which
 228                  * could depend on the mode */
 229 #define O(a,b) ((a<<8)|b)
 230                 switch (O(mode,opt)) {
 231                 case O(CREATE,'c'):
 232                 case O(BUILD,'c'): /* chunk or rounding */
 233                         if (chunk) {
 234                                 fprintf(stderr, Name ": chunk/rounding may only be specified once. "
 235                                         "Second value is %s.\n", optarg);
 236                                 exit(2);
 237                         }
 238                         chunk = strtol(optarg, &c, 10);
 239                         if (!optarg[0] || *c || chunk<4 || ((chunk-1)&chunk)) {
 240                                 fprintf(stderr, Name ": invalid chunk/rounding value: %s\n",
 241                                         optarg);
 242                                 exit(2);
 243                         }
 244                         continue;
 245
 246                 case O(CREATE,'z'): /* size */
 247                         if (size) {
 248                                 fprintf(stderr, Name ": size may only be specified once. "
 249                                         "Second value is %s.\n", optarg);
 250                                 exit(2);
 251                         }
 252                         size = strtol(optarg, &c, 10);
 253                         if (!optarg[0] || *c || size < 4) {
 254                                 fprintf(stderr, Name ": invalid size: %s\n",
 255                                         optarg);
 256                                 exit(2);
 257                         }
 258                         continue;
 259
 260                 case O(CREATE,'l'):
 261                 case O(BUILD,'l'): /* set raid level*/
 262                         if (level != -10) {
 263                                 fprintf(stderr, Name ": raid level may only be set once.  "
 264                                         "Second value is %s.\n", optarg);
 265                                 exit(2);
 266                         }
 267                         level = map_name(pers, optarg);
 268                         if (level == -10) {
 269                                 fprintf(stderr, Name ": invalid raid level: %s\n",
 270                                         optarg);
 271                                 exit(2);
 272                         }
 273                         if (level != 0 && level != -1 && mode == BUILD) {
 274                                 fprintf(stderr, Name ": Raid level %s not permitted with --build.\n",
 275                                         optarg);
 276                                 exit(2);
 277                         }
 278                         if (sparedisks > 0 && level < 1 && level >= -1) {
 279                                 fprintf(stderr, Name ": raid level %s is incompatible with spare-devices setting.\n",
 280                                         optarg);
 281                                 exit(2);
 282                         }
 283                         ident.level = level;
 284                         continue;
 285
 286                 case O(CREATE,'p'): /* raid5 layout */
 287                         if (layout >= 0) {
 288                                 fprintf(stderr,Name ": layout may only be sent once.  "
 289                                         "Second value was %s\n", optarg);
 290                                 exit(2);
 291                         }
 292                         switch(level) {
 293                         default:
 294                                 fprintf(stderr, Name ": layout not meaningful for %s arrays.\n",
 295                                         map_num(pers, level));
 296                                 exit(2);
 297                         case -10:
 298                                 fprintf(stderr, Name ": raid level must be given before layout.\n");
 299                                 exit(2);
 300
 301                         case 5:
 302                                 layout = map_name(r5layout, optarg);
 303                                 if (layout==-10) {
 304                                         fprintf(stderr, Name ": layout %s not understood for raid5.\n",
 305                                                 optarg);
 306                                         exit(2);
 307                                 }
 308                                 break;
 309                         }
 310                         continue;
 311
 312                 case O(CREATE,'n'):
 313                 case O(BUILD,'n'): /* number of raid disks */
 314                         if (raiddisks) {
 315                                 fprintf(stderr, Name ": raid-devices set twice: %d and %s\n",
 316                                         raiddisks, optarg);
 317                                 exit(2);
 318                         }
 319                         raiddisks = strtol(optarg, &c, 10);
 320                         if (!optarg[0] || *c || raiddisks<=0 || raiddisks > MD_SB_DISKS) {
 321                                 fprintf(stderr, Name ": invalid number of raid devices: %s\n",
 322                                         optarg);
 323                                 exit(2);
 324                         }
 325                         if (raiddisks == 1 &&  !force) {
 326                                 fprintf(stderr, Name ": '1' is an unusual number of drives for an array, so it is probably\n"
 327                                         "     a mistake.  If you really mean it you will need to specify --force before\n"
 328                                         "     setting the number of drives.\n");
 329                                 exit(2);
 330                         }
 331                         ident.raid_disks = raiddisks;
 332                         continue;
 333
 334                 case O(CREATE,'x'): /* number of spare (eXtra) discs */
 335                         if (sparedisks) {
 336                                 fprintf(stderr,Name ": spare-devices set twice: %d and %s\n",
 337                                         sparedisks, optarg);
 338                                 exit(2);
 339                         }
 340                         if (level > -10 && level <= 0 && level >= -1) {
 341                                 fprintf(stderr, Name ": spare-devices setting is incompatible with raid level %d\n",
 342                                         level);
 343                                 exit(2);
 344                         }
 345                         sparedisks = strtol(optarg, &c, 10);
 346                         if (!optarg[0] || *c || sparedisks < 0 || sparedisks > MD_SB_DISKS - raiddisks) {
 347                                 fprintf(stderr, Name ": invalid number of spare-devices: %s\n",
 348                                         optarg);
 349                                 exit(2);
 350                         }
 351                         continue;
 352                 case O(BUILD,'f'): /* force honouring '-n 1' */
 353                 case O(CREATE,'f'): /* force honouring of device list */
 354                 case O(ASSEMBLE,'f'): /* force assembly */
 355                 case O(MISC,'f'): /* force zero */
 356                         force=1;
 357                         continue;
 358
 359                         /* now for the Assemble options */
 360                 case O(ASSEMBLE,'u'): /* uuid of array */
 361                         if (ident.uuid_set) {
 362                                 fprintf(stderr, Name ": uuid cannot be set twice.  "
 363                                         "Second value %s.\n", optarg);
 364                                 exit(2);
 365                         }
 366                         if (parse_uuid(optarg, ident.uuid))
 367                                 ident.uuid_set = 1;
 368                         else {
 369                                 fprintf(stderr,Name ": Bad uuid: %s\n", optarg);
 370                                 exit(2);
 371                         }
 372                         continue;
 373
 374                 case O(ASSEMBLE,'m'): /* super-minor for array */
 375                         if (ident.super_minor != -1) {
 376                                 fprintf(stderr, Name ": super-minor cannot be set twice.  "
 377                                         "Second value: %s.\n", optarg);
 378                                 exit(2);
 379                         }
 380                         if (strcmp(optarg, "dev")==0)
 381                                 ident.super_minor = -2;
 382                         else {
 383                                 ident.super_minor = strtoul(optarg, &cp, 10);
 384                                 if (!optarg[0] || *cp) {
 385                                         fprintf(stderr, Name ": Bad super-minor number: %s.\n", optarg);
 386                                         exit(2);
 387                                 }
 388                         }
 389                         continue;
 390
 391                 case O(ASSEMBLE,'U'): /* update the superblock */
 392                         if (update) {
 393                                 fprintf(stderr, Name ": Can only update one aspect of superblock, both %s and %s given.\n",
 394                                         update, optarg);
 395                                 exit(2);
 396                         }
 397                         update = optarg;
 398                         if (strcmp(update, "sparc2.2")==0) continue;
 399                         if (strcmp(update, "super-minor") == 0)
 400                                 continue;
 401                         if (strcmp(update, "summaries")==0)
 402                                 continue;
 403                         fprintf(stderr, Name ": '--update %s' invalid.  Only 'sparc2.2', 'super-minor' or 'summaries' supported\n",update);
 404                         exit(2);
 405
 406                 case O(ASSEMBLE,'c'): /* config file */
 407                 case O(MISC, 'c'):
 408                 case O(MONITOR,'c'):
 409                         if (configfile) {
 410                                 fprintf(stderr, Name ": configfile cannot be set twice.  "
 411                                         "Second value is %s.\n", optarg);
 412                                 exit(2);
 413                         }
 414                         configfile = optarg;
 415                         /* FIXME possibly check that config file exists.  Even parse it */
 416                         continue;
 417                 case O(ASSEMBLE,'s'): /* scan */
 418                 case O(MISC,'s'):
 419                 case O(MONITOR,'s'):
 420                         scan = 1;
 421                         continue;
 422
 423                 case O(MONITOR,'m'): /* mail address */
 424                         if (mailaddr)
 425                                 fprintf(stderr, Name ": only specify one mailaddress. %s ignored.\n",
 426                                         optarg);
 427                         else
 428                                 mailaddr = optarg;
 429                         continue;
 430
 431                 case O(MONITOR,'p'): /* alert program */
 432                         if (program)
 433                                 fprintf(stderr, Name ": only specify one alter program. %s ignored.\n",
 434                                         optarg);
 435                         else
 436                                 program = optarg;
 437                         continue;
 438
 439                 case O(MONITOR,'d'): /* delay in seconds */
 440                         if (delay)
 441                                 fprintf(stderr, Name ": only specify delay once. %s ignored.\n",
 442                                         optarg);
 443                         else {
 444                                 delay = strtol(optarg, &c, 10);
 445                                 if (!optarg[0] || *c || delay<1) {
 446                                         fprintf(stderr, Name ": invalid delay: %s\n",
 447                                                 optarg);
 448                                         exit(2);
 449                                 }
 450                         }
 451                         continue;
 452                 case O(MONITOR,'f'): /* daemonise */
 453                         daemonise = 1;
 454                         continue;
 455                 case O(MONITOR,'1'): /* oneshot */
 456                         oneshot = 1;
 457                         continue;
 458
 459                         /* now the general management options.  Some are applicable
 460                          * to other modes. None have arguments.
 461                          */
 462                 case O(MANAGE,'a'):
 463                 case O(CREATE,'a'):
 464                 case O(BUILD,'a'):
 465                 case O(ASSEMBLE,'a'): /* add a drive */
 466                         devmode = 'a';
 467                         continue;
 468                 case O(MANAGE,'r'): /* remove a drive */
 469                         devmode = 'r';
 470                         continue;
 471                 case O(MANAGE,'f'): /* set faulty */
 472                         devmode = 'f';
 473                         continue;
 474                 case O(MANAGE,'R'):
 475                 case O(ASSEMBLE,'R'):
 476                 case O(BUILD,'R'):
 477                 case O(CREATE,'R'): /* Run the array */
 478                         if (runstop < 0) {
 479                                 fprintf(stderr, Name ": Cannot both Stop and Run an array\n");
 480                                 exit(2);
 481                         }
 482                         runstop = 1;
 483                         continue;
 484                 case O(MANAGE,'S'):
 485                         if (runstop > 0) {
 486                                 fprintf(stderr, Name ": Cannot both Run and Stop an array\n");
 487                                 exit(2);
 488                         }
 489                         runstop = -1;
 490                         continue;
 491
 492                 case O(MANAGE,'o'):
 493                         if (readonly < 0) {
 494                                 fprintf(stderr, Name ": Cannot have both readonly and readwrite\n");
 495                                 exit(2);
 496                         }
 497                         readonly = 1;
 498                         continue;
 499                 case O(MANAGE,'w'):
 500                         if (readonly > 0) {
 501                                 fprintf(stderr, Name ": Cannot have both readwrite and readonly.\n");
 502                                 exit(2);
 503                         }
 504                         readonly = -1;
 505                         continue;
 506
 507                 case O(MISC,'Q'):
 508                 case O(MISC,'D'):
 509                 case O(MISC,'E'):
 510                 case O(MISC,'K'):
 511                 case O(MISC,'R'):
 512                 case O(MISC,'S'):
 513                 case O(MISC,'o'):
 514                 case O(MISC,'w'):
 515                         if (devmode && devmode != opt &&
 516                             (devmode == 'E' || (opt == 'E' && devmode != 'Q'))) {
 517                                 fprintf(stderr, Name ": --examine/-E cannot be given with -%c\n",
 518                                         devmode =='E'?opt:devmode);
 519                                 exit(2);
 520                         }
 521                         devmode = opt;
 522                         continue;
 523                 case O(MISC,'t'):
 524                         test = 1;
 525                         continue;
 526
 527                 case O(MISC, 22):
 528                         if (devmode != 'E') {
 529                                 fprintf(stderr, Name ": --sparc2.2 only allowed with --examine\n");
 530                                 exit(2);
 531                         }
 532                         SparcAdjust = 1;
 533                         continue;
 534                 }
 535                 /* We have now processed all the valid options. Anything else is
 536                  * an error
 537                  */
 538                 fprintf(stderr, Name ": option %c not valid in %s mode\n",
 539                         opt, map_num(modes, mode));
 540                 exit(2);
 541
 542         }
 543
 544         if (!mode) {
 545                 fputs(Usage, stderr);
 546                 exit(2);
 547         }
 548         /* Ok, got the option parsing out of the way
 549          * hopefully it's mostly right but there might be some stuff
 550          * missing
 551          *
 552          * That is mosty checked in the per-mode stuff but...
 553          *
 554          * For @,B,C  and A without -s, the first device listed must be an md device
 555          * we check that here and open it.
 556          */
 557
 558         if (mode==MANAGE || mode == BUILD || mode == CREATE || (mode == ASSEMBLE && ! scan)) {
 559                 if (devs_found < 1) {
 560                         fprintf(stderr, Name ": an md device must be given in this mode\n");
 561                         exit(2);
 562                 }
 563                 mdfd = open_mddev(devlist->devname);
 564                 if (mdfd < 0)
 565                         exit(1);
 566                 if (ident.super_minor == -2) {
 567                         struct stat stb;
 568                         fstat(mdfd, &stb);
 569                         ident.super_minor = MINOR(stb.st_rdev);
 570                 }
 571         }
 572
 573         rv = 0;
 574         switch(mode) {
 575         case MANAGE:
 576                 /* readonly, add/remove, readwrite, runstop */
 577                 if (readonly>0)
 578                         rv = Manage_ro(devlist->devname, mdfd, readonly);
 579                 if (!rv && devs_found>1)
 580                         rv = Manage_subdevs(devlist->devname, mdfd,
 581                                             devlist->next);
 582                 if (!rv && readonly < 0)
 583                         rv = Manage_ro(devlist->devname, mdfd, readonly);
 584                 if (!rv && runstop)
 585                         rv = Manage_runstop(devlist->devname, mdfd, runstop);
 586                 break;
 587         case ASSEMBLE:
 588                 if (devs_found == 1 && ident.uuid_set == 0 &&
 589                     ident.super_minor == -1 && !scan ) {
 590                         /* Only a device has been given, so get details from config file */
 591                         mddev_ident_t array_ident = conf_get_ident(configfile, devlist->devname);
 592                         mdfd = open_mddev(devlist->devname);
 593                         if (mdfd < 0)
 594                                 rv |= 1;
 595                         else {
 596                                 if (array_ident == NULL) {
 597                                         fprintf(stderr, Name ": %s not identified in config file.\n",
 598                                                 devlist->devname);
 599                                         rv |= 1;
 600                                 }
 601                                 else
 602                                         rv |= Assemble(devlist->devname, mdfd, array_ident, configfile,
 603                                                        NULL,
 604                                                        readonly, runstop, update, verbose, force);
 605                         }
 606                 } else if (!scan)
 607                         rv = Assemble(devlist->devname, mdfd, &ident, configfile,
 608                                       devlist->next,
 609                                       readonly, runstop, update, verbose, force);
 610                 else if (devs_found>0) {
 611                         if (update && devs_found > 1) {
 612                                 fprintf(stderr, Name ": can only update a single array at a time\n");
 613                                 exit(1);
 614                         }
 615                         for (dv = devlist ; dv ; dv=dv->next) {
 616                                 mddev_ident_t array_ident = conf_get_ident(configfile, dv->devname);
 617                                 mdfd = open_mddev(dv->devname);
 618                                 if (mdfd < 0) {
 619                                         rv |= 1;
 620                                         continue;
 621                                 }
 622                                 if (array_ident == NULL) {
 623                                         fprintf(stderr, Name ": %s not identified in config file.\n",
 624                                                 dv->devname);
 625                                         rv |= 1;
 626                                         continue;
 627                                 }
 628                                 rv |= Assemble(dv->devname, mdfd, array_ident, configfile,
 629                                                NULL,
 630                                                readonly, runstop, update, verbose, force);
 631                         }
 632                 } else {
 633                         mddev_ident_t array_list =  conf_get_ident(configfile, NULL);
 634                         if (!array_list) {
 635                                 fprintf(stderr, Name ": No arrays found in config file\n");
 636                                 rv = 1;
 637                         } else
 638                                 for (; array_list; array_list = array_list->next) {
 639                                         mdu_array_info_t array;
 640                                         mdfd = open_mddev(array_list->devname);
 641                                         if (mdfd < 0) {
 642                                                 rv |= 1;
 643                                                 continue;
 644                                         }
 645                                         if (ioctl(mdfd, GET_ARRAY_INFO, &array)>=0)
 646                                                 /* already assembled, skip */
 647                                                 continue;
 648                                         rv |= Assemble(array_list->devname, mdfd,
 649                                                        array_list, configfile,
 650                                                        NULL,
 651                                                        readonly, runstop, NULL, verbose, force);
 652                                 }
 653                 }
 654                 break;
 655         case BUILD:
 656                 rv = Build(devlist->devname, mdfd, chunk, level, raiddisks, devlist->next);
 657                 break;
 658         case CREATE:
 659                 rv = Create(devlist->devname, mdfd, chunk, level, layout, size,
 660                             raiddisks, sparedisks,
 661                             devs_found-1, devlist->next, runstop, verbose, force);
 662                 break;
 663         case MISC:
 664
 665                 if (devmode == 'E') {
 666                         if (devlist == NULL && !scan) {
 667                                 fprintf(stderr, Name ": No devices to examine\n");
 668                                 exit(2);
 669                         }
 670                         if (devlist == NULL)
 671                                 devlist = conf_get_devs(configfile);
 672                         if (devlist == NULL) {
 673                                 fprintf(stderr, Name ": No devices listed in %s\n", configfile?configfile:DefaultConfFile);
 674                                 exit(1);
 675                         }
 676                         rv = Examine(devlist, scan?!verbose:brief, scan, SparcAdjust);
 677                 } else {
 678                         if (devlist == NULL) {
 679                                 if ((devmode == 'S' ||devmode=='D') && scan) {
 680                                         /* apply to all devices in /proc/mdstat */
 681                                         struct mdstat_ent *ms = mdstat_read();
 682                                         struct mdstat_ent *e;
 683                                         for (e=ms ; e ; e=e->next) {
 684                                                 char *name = get_md_name(e->devnum);
 685
 686                                                 if (!name) {
 687                                                         fprintf(stderr, Name ": cannot find device file for %s\n",
 688                                                                 e->dev);
 689                                                         continue;
 690                                                 }
 691                                                 if (devmode == 'D')
 692                                                         rv |= Detail(name, !verbose, test);
 693                                                 else if (devmode=='S') {
 694                                                         mdfd = open_mddev(name);
 695                                                         if (mdfd >= 0)
 696                                                                 rv |= Manage_runstop(name, mdfd, -1);
 697                                                 }
 698                                                 put_md_name(name);
 699                                         }
 700                                 } else {
 701                                         fprintf(stderr, Name ": No devices given.\n");
 702                                         exit(2);
 703                                 }
 704                         }
 705                         for (dv=devlist ; dv; dv=dv->next) {
 706                                 switch(dv->disposition) {
 707                                 case 'D':
 708                                         rv |= Detail(dv->devname, brief, test); continue;
 709                                 case 'K': /* Zero superblock */
 710                                         rv |= Kill(dv->devname, force); continue;
 711                                 case 'Q':
 712                                         rv |= Query(dv->devname); continue;
 713                                 }
 714                                 mdfd = open_mddev(dv->devname);
 715                                 if (mdfd>=0)
 716                                         switch(dv->disposition) {
 717                                         case 'R':
 718                                                 rv |= Manage_runstop(dv->devname, mdfd, 1); break;
 719                                         case 'S':
 720                                                 rv |= Manage_runstop(dv->devname, mdfd, -1); break;
 721                                         case 'o':
 722                                                 rv |= Manage_ro(dv->devname, mdfd, 1); break;
 723                                         case 'w':
 724                                                 rv |= Manage_ro(dv->devname, mdfd, -1); break;
 725                                         }
 726                         }
 727                 }
 728                 break;
 729         case MONITOR:
 730                 if (!devlist && !scan) {
 731                         fprintf(stderr, Name ": Cannot monitor: need --scan or at least one device\n");
 732                         rv = 1;
 733                         break;
 734                 }
 735                 rv= Monitor(devlist, mailaddr, program,
 736                             delay?delay:60, daemonise, scan, oneshot, configfile);
 737                 break;
 738         }
 739         exit(rv);
 740 }