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 #include <ctype.h>
  33
  34
  35
  36 int main(int argc, char *argv[])
  37 {
  38         int mode = 0;
  39         int opt;
  40         int option_index;
  41         char *help_text;
  42         char *c;
  43         int rv;
  44
  45         int chunk = 0;
  46         int size = -1;
  47         int level = UnSet;
  48         int layout = UnSet;
  49         int raiddisks = 0;
  50         int sparedisks = 0;
  51         struct mddev_ident_s ident;
  52         char *configfile = NULL;
  53         char *cp;
  54         char *update = NULL;
  55         int scan = 0;
  56         char devmode = 0;
  57         int runstop = 0;
  58         int readonly = 0;
  59         int SparcAdjust = 0;
  60         mddev_dev_t devlist = NULL;
  61         mddev_dev_t *devlistend = & devlist;
  62         mddev_dev_t dv;
  63         int devs_found = 0;
  64         int verbose = 0;
  65         int brief = 0;
  66         int force = 0;
  67         int test = 0;
  68         int assume_clean = 0;
  69         int autof = 0; /* -2 means create device based on name:
  70                         *    if it ends mdN, then non-partitioned array N
  71                         *    if it ends dN, then partitions array N
  72                         * -1 means create non-partitioned, choose N
  73                         *  1 or more to create partitioned
  74                         * If -1 or 1 and name is a 'standard' name, then
  75                         * insist on a match of type and number.
  76                         */
  77
  78         char *mailaddr = NULL;
  79         char *program = NULL;
  80         int delay = 0;
  81         int daemonise = 0;
  82         char *pidfile = NULL;
  83         int oneshot = 0;
  84
  85         int copies;
  86
  87         int mdfd = -1;
  88
  89         ident.uuid_set=0;
  90         ident.level = UnSet;
  91         ident.raid_disks = UnSet;
  92         ident.super_minor= UnSet;
  93         ident.devices=0;
  94         ident.spare_group = NULL;
  95         ident.autof = 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                                 case GROW     : help_text = Help_grow; break;
 118                                 }
 119                         fputs(help_text,stderr);
 120                         exit(0);
 121
 122                 case 'V':
 123                         fputs(Version, stderr);
 124                         exit(0);
 125
 126                 case 'v': verbose = 1;
 127                         continue;
 128
 129                 case 'b': brief = 1;
 130                         continue;
 131
 132                 case ':':
 133                 case '?':
 134                         fputs(Usage, stderr);
 135                         exit(2);
 136                 }
 137                 /* second, figure out the mode.
 138                  * Some options force the mode.  Others
 139                  * set the mode if it isn't already
 140                  */
 141
 142                 switch(opt) {
 143                 case '@': /* just incase they say --manage */
 144                         newmode = MANAGE; break;
 145                 case 'a':
 146                 case 'r':
 147                 case 'f':
 148                 case 1 : if (!mode) newmode = MANAGE; break;
 149
 150                 case 'A': newmode = ASSEMBLE; break;
 151                 case 'B': newmode = BUILD; break;
 152                 case 'C': newmode = CREATE; break;
 153                 case 'F': newmode = MONITOR;break;
 154                 case 'G': newmode = GROW; break;
 155
 156                 case '#':
 157                 case 'D':
 158                 case 'E':
 159                 case 'Q': newmode = MISC; break;
 160                 case 'R':
 161                 case 'S':
 162                 case 'o':
 163                 case 'w':
 164                 case 'K': if (!mode) newmode = MISC; break;
 165                 }
 166                 if (mode && newmode == mode) {
 167                         /* everybody happy ! */
 168                 } else if (mode && newmode != mode) {
 169                         /* not allowed.. */
 170                         fprintf(stderr, Name ": ");
 171                         if (option_index >= 0)
 172                                 fprintf(stderr, "--%s", long_options[option_index].name);
 173                         else
 174                                 fprintf(stderr, "-%c", opt);
 175                         fprintf(stderr, " would set mode to %s, but it is already %s.\n",
 176                                 map_num(modes, newmode),
 177                                 map_num(modes, mode));
 178                         exit(2);
 179                 } else if (!mode && newmode) {
 180                         mode = newmode;
 181                 } else {
 182                         /* special case of -c --help */
 183                         if (opt == 'c' &&
 184                             ( strncmp(optarg, "--h", 3)==0 ||
 185                               strncmp(optarg, "-h", 2)==0)) {
 186                                 fputs(Help_config, stderr);
 187                                 exit(0);
 188                         }
 189                         if (option_index >= 0)
 190                                 fprintf(stderr, "--%s", long_options[option_index].name);
 191                         else
 192                                 fprintf(stderr, "-%c", opt);
 193                         fprintf(stderr, " does not set the mode, and so cannot be first.\n");
 194                         exit(2);
 195                 }
 196
 197                 /* if we just set the mode, then done */
 198                 switch(opt) {
 199                 case '@':
 200                 case '#':
 201                 case 'A':
 202                 case 'B':
 203                 case 'C':
 204                 case 'F':
 205                 case 'G':
 206                         continue;
 207                 }
 208                 if (opt == 1) {
 209                         /* an undecorated option - must be a device name.
 210                          */
 211                         if (devs_found > 0 && mode == '@' && !devmode) {
 212                                 fprintf(stderr, Name ": Must give one of -a/-r/-f for subsequent devices at %s\n", optarg);
 213                                 exit(2);
 214                         }
 215                         if (devs_found > 0 && mode == 'G' && !devmode) {
 216                                 fprintf(stderr, Name ": Must give one of -a for devices do add: %s\n", optarg);
 217                                 exit(2);
 218                         }
 219                         dv = malloc(sizeof(*dv));
 220                         if (dv == NULL) {
 221                                 fprintf(stderr, Name ": malloc failed\n");
 222                                 exit(3);
 223                         }
 224                         dv->devname = optarg;
 225                         dv->disposition = devmode;
 226                         dv->next = NULL;
 227                         *devlistend = dv;
 228                         devlistend = &dv->next;
 229
 230                         devs_found++;
 231                         continue;
 232                 }
 233
 234                 /* We've got a mode, and opt is now something else which
 235                  * could depend on the mode */
 236 #define O(a,b) ((a<<8)|b)
 237                 switch (O(mode,opt)) {
 238                 case O(CREATE,'c'):
 239                 case O(BUILD,'c'): /* chunk or rounding */
 240                         if (chunk) {
 241                                 fprintf(stderr, Name ": chunk/rounding may only be specified once. "
 242                                         "Second value is %s.\n", optarg);
 243                                 exit(2);
 244                         }
 245                         chunk = strtol(optarg, &c, 10);
 246                         if (!optarg[0] || *c || chunk<4 || ((chunk-1)&chunk)) {
 247                                 fprintf(stderr, Name ": invalid chunk/rounding value: %s\n",
 248                                         optarg);
 249                                 exit(2);
 250                         }
 251                         continue;
 252
 253                 case O(GROW,'z'):
 254                 case O(CREATE,'z'): /* size */
 255                         if (size >= 0) {
 256                                 fprintf(stderr, Name ": size may only be specified once. "
 257                                         "Second value is %s.\n", optarg);
 258                                 exit(2);
 259                         }
 260                         if (strcmp(optarg, "max")==0)
 261                                 size = 0;
 262                         else {
 263                                 size = strtol(optarg, &c, 10);
 264                                 if (!optarg[0] || *c || size < 4) {
 265                                         fprintf(stderr, Name ": invalid size: %s\n",
 266                                                 optarg);
 267                                         exit(2);
 268                                 }
 269                         }
 270                         continue;
 271
 272                 case O(GROW,'l'): /* hack - needed to understand layout */
 273                 case O(CREATE,'l'):
 274                 case O(BUILD,'l'): /* set raid level*/
 275                         if (level != UnSet) {
 276                                 fprintf(stderr, Name ": raid level may only be set once.  "
 277                                         "Second value is %s.\n", optarg);
 278                                 exit(2);
 279                         }
 280                         level = map_name(pers, optarg);
 281                         if (level == UnSet) {
 282                                 fprintf(stderr, Name ": invalid raid level: %s\n",
 283                                         optarg);
 284                                 exit(2);
 285                         }
 286                         if (level != 0 && level != -1 && level != 1 && level != -4 && level != -5 && mode == BUILD) {
 287                                 fprintf(stderr, Name ": Raid level %s not permitted with --build.\n",
 288                                         optarg);
 289                                 exit(2);
 290                         }
 291                         if (sparedisks > 0 && level < 1 && level >= -1) {
 292                                 fprintf(stderr, Name ": raid level %s is incompatible with spare-devices setting.\n",
 293                                         optarg);
 294                                 exit(2);
 295                         }
 296                         ident.level = level;
 297                         continue;
 298
 299                 case O(CREATE,'p'): /* raid5 layout */
 300                 case O(BUILD,'p'): /* faulty layout */
 301                 case O(GROW, 'p'): /* faulty reconfig */
 302                         if (layout != UnSet) {
 303                                 fprintf(stderr,Name ": layout may only be sent once.  "
 304                                         "Second value was %s\n", optarg);
 305                                 exit(2);
 306                         }
 307                         switch(level) {
 308                         default:
 309                                 fprintf(stderr, Name ": layout not meaningful for %s arrays.\n",
 310                                         map_num(pers, level));
 311                                 exit(2);
 312                         case UnSet:
 313                                 fprintf(stderr, Name ": raid level must be given before layout.\n");
 314                                 exit(2);
 315
 316                         case 5:
 317                         case 6:
 318                                 layout = map_name(r5layout, optarg);
 319                                 if (layout==UnSet) {
 320                                         fprintf(stderr, Name ": layout %s not understood for raid5.\n",
 321                                                 optarg);
 322                                         exit(2);
 323                                 }
 324                                 break;
 325
 326                         case 10:
 327                                 /* 'f' or 'n' followed by a number <= raid_disks */
 328                                 if ((optarg[0] !=  'n' && optarg[0] != 'f') ||
 329                                     (copies = strtoul(optarg+1, &cp, 10)) < 1 ||
 330                                     copies > 200 ||
 331                                     *cp) {
 332                                         fprintf(stderr, Name ": layout for raid10 must be 'nNN' or 'fNN' where NN is a number, not %s\n", optarg);
 333                                         exit(2);
 334                                 }
 335                                 if (optarg[0] == 'n')
 336                                         layout = 256 + copies;
 337                                 else
 338                                         layout = 1 + (copies<<8);
 339                                 break;
 340                         case -5: /* Faulty
 341                                   * modeNNN
 342                                   */
 343
 344                         {
 345                                 int ln = strcspn(optarg, "0123456789");
 346                                 char *m = strdup(optarg);
 347                                 int mode;
 348                                 m[ln] = 0;
 349                                 mode = map_name(faultylayout, m);
 350                                 if (mode == UnSet) {
 351                                         fprintf(stderr, Name ": layout %s not understood for faulty.\n",
 352                                                 optarg);
 353                                         exit(2);
 354                                 }
 355                                 layout = mode | (atoi(optarg+ln)<< ModeShift);
 356                         }
 357                         }
 358                         continue;
 359
 360                 case O(CREATE,3):
 361                 case O(BUILD,3): /* assume clean */
 362                         assume_clean = 1;
 363                         continue;
 364
 365                 case O(GROW,'n'):
 366                 case O(CREATE,'n'):
 367                 case O(BUILD,'n'): /* number of raid disks */
 368                         if (raiddisks) {
 369                                 fprintf(stderr, Name ": raid-devices set twice: %d and %s\n",
 370                                         raiddisks, optarg);
 371                                 exit(2);
 372                         }
 373                         raiddisks = strtol(optarg, &c, 10);
 374                         if (!optarg[0] || *c || raiddisks<=0 || raiddisks > MD_SB_DISKS) {
 375                                 fprintf(stderr, Name ": invalid number of raid devices: %s\n",
 376                                         optarg);
 377                                 exit(2);
 378                         }
 379                         if (raiddisks == 1 &&  !force && level != -5) {
 380                                 fprintf(stderr, Name ": '1' is an unusual number of drives for an array, so it is probably\n"
 381                                         "     a mistake.  If you really mean it you will need to specify --force before\n"
 382                                         "     setting the number of drives.\n");
 383                                 exit(2);
 384                         }
 385                         ident.raid_disks = raiddisks;
 386                         continue;
 387
 388                 case O(CREATE,'x'): /* number of spare (eXtra) discs */
 389                         if (sparedisks) {
 390                                 fprintf(stderr,Name ": spare-devices set twice: %d and %s\n",
 391                                         sparedisks, optarg);
 392                                 exit(2);
 393                         }
 394                         if (level != UnSet && level <= 0 && level >= -1) {
 395                                 fprintf(stderr, Name ": spare-devices setting is incompatible with raid level %d\n",
 396                                         level);
 397                                 exit(2);
 398                         }
 399                         sparedisks = strtol(optarg, &c, 10);
 400                         if (!optarg[0] || *c || sparedisks < 0 || sparedisks > MD_SB_DISKS - raiddisks) {
 401                                 fprintf(stderr, Name ": invalid number of spare-devices: %s\n",
 402                                         optarg);
 403                                 exit(2);
 404                         }
 405                         continue;
 406
 407                 case O(CREATE,'a'):
 408                 case O(BUILD,'a'):
 409                 case O(ASSEMBLE,'a'): /* auto-creation of device node */
 410                         if (optarg == NULL)
 411                                 autof = -2;
 412                         else if (strcasecmp(optarg,"no")==0)
 413                                 autof = 0;
 414                         else if (strcasecmp(optarg,"yes")==0)
 415                                 autof = -2;
 416                         else if (strcasecmp(optarg,"md")==0)
 417                                 autof = -1;
 418                         else {
 419                                 /* There might be digits, and maybe a hypen, at the end */
 420                                 char *e = optarg + strlen(optarg);
 421                                 int num = 4;
 422                                 int len;
 423                                 while (e > optarg && isdigit(e[-1]))
 424                                         e--;
 425                                 if (*e) {
 426                                         num = atoi(e);
 427                                         if (num <= 0) num = 1;
 428                                 }
 429                                 if (e > optarg && e[-1] == '-')
 430                                         e--;
 431                                 len = e - optarg;
 432                                 if ((len == 3 && strncasecmp(optarg,"mdp",3)==0) ||
 433                                     (len == 1 && strncasecmp(optarg,"p",1)==0) ||
 434                                     (len >= 4 && strncasecmp(optarg,"part",4)==0))
 435                                         autof = num;
 436                                 else {
 437                                         fprintf(stderr, Name ": --auto flag arg of \"%s\" unrecognised: use no,yes,md,mdp,part\n"
 438                                                 "        optionally followed by a number.\n",
 439                                                 optarg);
 440                                         exit(2);
 441                                 }
 442                         }
 443                         continue;
 444
 445                 case O(BUILD,'f'): /* force honouring '-n 1' */
 446                 case O(CREATE,'f'): /* force honouring of device list */
 447                 case O(ASSEMBLE,'f'): /* force assembly */
 448                 case O(MISC,'f'): /* force zero */
 449                         force=1;
 450                         continue;
 451
 452                         /* now for the Assemble options */
 453                 case O(ASSEMBLE,'u'): /* uuid of array */
 454                         if (ident.uuid_set) {
 455                                 fprintf(stderr, Name ": uuid cannot be set twice.  "
 456                                         "Second value %s.\n", optarg);
 457                                 exit(2);
 458                         }
 459                         if (parse_uuid(optarg, ident.uuid))
 460                                 ident.uuid_set = 1;
 461                         else {
 462                                 fprintf(stderr,Name ": Bad uuid: %s\n", optarg);
 463                                 exit(2);
 464                         }
 465                         continue;
 466
 467                 case O(ASSEMBLE,'m'): /* super-minor for array */
 468                         if (ident.super_minor != UnSet) {
 469                                 fprintf(stderr, Name ": super-minor cannot be set twice.  "
 470                                         "Second value: %s.\n", optarg);
 471                                 exit(2);
 472                         }
 473                         if (strcmp(optarg, "dev")==0)
 474                                 ident.super_minor = -2;
 475                         else {
 476                                 ident.super_minor = strtoul(optarg, &cp, 10);
 477                                 if (!optarg[0] || *cp) {
 478                                         fprintf(stderr, Name ": Bad super-minor number: %s.\n", optarg);
 479                                         exit(2);
 480                                 }
 481                         }
 482                         continue;
 483
 484                 case O(ASSEMBLE,'U'): /* update the superblock */
 485                         if (update) {
 486                                 fprintf(stderr, Name ": Can only update one aspect of superblock, both %s and %s given.\n",
 487                                         update, optarg);
 488                                 exit(2);
 489                         }
 490                         update = optarg;
 491                         if (strcmp(update, "sparc2.2")==0)
 492                                 continue;
 493                         if (strcmp(update, "super-minor") == 0)
 494                                 continue;
 495                         if (strcmp(update, "summaries")==0)
 496                                 continue;
 497                         if (strcmp(update, "resync")==0)
 498                                 continue;
 499                         fprintf(stderr, Name ": '--update %s' invalid.  Only 'sparc2.2', 'super-minor', 'resync' or 'summaries' supported\n",update);
 500                         exit(2);
 501
 502                 case O(ASSEMBLE,'c'): /* config file */
 503                 case O(MISC, 'c'):
 504                 case O(MONITOR,'c'):
 505                         if (configfile) {
 506                                 fprintf(stderr, Name ": configfile cannot be set twice.  "
 507                                         "Second value is %s.\n", optarg);
 508                                 exit(2);
 509                         }
 510                         configfile = optarg;
 511                         /* FIXME possibly check that config file exists.  Even parse it */
 512                         continue;
 513                 case O(ASSEMBLE,'s'): /* scan */
 514                 case O(MISC,'s'):
 515                 case O(MONITOR,'s'):
 516                         scan = 1;
 517                         continue;
 518
 519                 case O(MONITOR,'m'): /* mail address */
 520                         if (mailaddr)
 521                                 fprintf(stderr, Name ": only specify one mailaddress. %s ignored.\n",
 522                                         optarg);
 523                         else
 524                                 mailaddr = optarg;
 525                         continue;
 526
 527                 case O(MONITOR,'p'): /* alert program */
 528                         if (program)
 529                                 fprintf(stderr, Name ": only specify one alter program. %s ignored.\n",
 530                                         optarg);
 531                         else
 532                                 program = optarg;
 533                         continue;
 534
 535                 case O(MONITOR,'d'): /* delay in seconds */
 536                         if (delay)
 537                                 fprintf(stderr, Name ": only specify delay once. %s ignored.\n",
 538                                         optarg);
 539                         else {
 540                                 delay = strtol(optarg, &c, 10);
 541                                 if (!optarg[0] || *c || delay<1) {
 542                                         fprintf(stderr, Name ": invalid delay: %s\n",
 543                                                 optarg);
 544                                         exit(2);
 545                                 }
 546                         }
 547                         continue;
 548                 case O(MONITOR,'f'): /* daemonise */
 549                         daemonise = 1;
 550                         continue;
 551                 case O(MONITOR,'i'): /* pid */
 552                         if (pidfile)
 553                                 fprintf(stderr, Name ": only specify one pid file. %s ignored.\n",
 554                                         optarg);
 555                         else
 556                                 pidfile = optarg;
 557                         continue;
 558                 case O(MONITOR,'1'): /* oneshot */
 559                         oneshot = 1;
 560                         continue;
 561                 case O(MONITOR,'t'): /* test */
 562                         test = 1;
 563                         continue;
 564
 565                         /* now the general management options.  Some are applicable
 566                          * to other modes. None have arguments.
 567                          */
 568                 case O(GROW,'a'):
 569                 case O(MANAGE,'a'): /* add a drive */
 570                         devmode = 'a';
 571                         continue;
 572                 case O(MANAGE,'r'): /* remove a drive */
 573                         devmode = 'r';
 574                         continue;
 575                 case O(MANAGE,'f'): /* set faulty */
 576                         devmode = 'f';
 577                         continue;
 578                 case O(MANAGE,'R'):
 579                 case O(ASSEMBLE,'R'):
 580                 case O(BUILD,'R'):
 581                 case O(CREATE,'R'): /* Run the array */
 582                         if (runstop < 0) {
 583                                 fprintf(stderr, Name ": Cannot both Stop and Run an array\n");
 584                                 exit(2);
 585                         }
 586                         runstop = 1;
 587                         continue;
 588                 case O(MANAGE,'S'):
 589                         if (runstop > 0) {
 590                                 fprintf(stderr, Name ": Cannot both Run and Stop an array\n");
 591                                 exit(2);
 592                         }
 593                         runstop = -1;
 594                         continue;
 595
 596                 case O(MANAGE,'o'):
 597                         if (readonly < 0) {
 598                                 fprintf(stderr, Name ": Cannot have both readonly and readwrite\n");
 599                                 exit(2);
 600                         }
 601                         readonly = 1;
 602                         continue;
 603                 case O(MANAGE,'w'):
 604                         if (readonly > 0) {
 605                                 fprintf(stderr, Name ": Cannot have both readwrite and readonly.\n");
 606                                 exit(2);
 607                         }
 608                         readonly = -1;
 609                         continue;
 610
 611                 case O(MISC,'Q'):
 612                 case O(MISC,'D'):
 613                 case O(MISC,'E'):
 614                 case O(MISC,'K'):
 615                 case O(MISC,'R'):
 616                 case O(MISC,'S'):
 617                 case O(MISC,'o'):
 618                 case O(MISC,'w'):
 619                         if (devmode && devmode != opt &&
 620                             (devmode == 'E' || (opt == 'E' && devmode != 'Q'))) {
 621                                 fprintf(stderr, Name ": --examine/-E cannot be given with -%c\n",
 622                                         devmode =='E'?opt:devmode);
 623                                 exit(2);
 624                         }
 625                         devmode = opt;
 626                         continue;
 627                 case O(MISC,'t'):
 628                         test = 1;
 629                         continue;
 630
 631                 case O(MISC, 22):
 632                         if (devmode != 'E') {
 633                                 fprintf(stderr, Name ": --sparc2.2 only allowed with --examine\n");
 634                                 exit(2);
 635                         }
 636                         SparcAdjust = 1;
 637                         continue;
 638                 }
 639                 /* We have now processed all the valid options. Anything else is
 640                  * an error
 641                  */
 642                 fprintf(stderr, Name ": option %c not valid in %s mode\n",
 643                         opt, map_num(modes, mode));
 644                 exit(2);
 645
 646         }
 647
 648         if (!mode) {
 649                 fputs(Usage, stderr);
 650                 exit(2);
 651         }
 652         /* Ok, got the option parsing out of the way
 653          * hopefully it's mostly right but there might be some stuff
 654          * missing
 655          *
 656          * That is mosty checked in the per-mode stuff but...
 657          *
 658          * For @,B,C  and A without -s, the first device listed must be an md device
 659          * we check that here and open it.
 660          */
 661
 662         if (mode==MANAGE || mode == BUILD || mode == CREATE || mode == GROW ||
 663             (mode == ASSEMBLE && ! scan)) {
 664                 if (devs_found < 1) {
 665                         fprintf(stderr, Name ": an md device must be given in this mode\n");
 666                         exit(2);
 667                 }
 668                 if ((int)ident.super_minor == -2 && autof) {
 669                         fprintf(stderr, Name ": --super-minor=dev is incompatible with --auto\n");
 670                         exit(2);
 671                 }
 672                 mdfd = open_mddev(devlist->devname, autof);
 673                 if (mdfd < 0)
 674                         exit(1);
 675                 if ((int)ident.super_minor == -2) {
 676                         struct stat stb;
 677                         fstat(mdfd, &stb);
 678                         ident.super_minor = minor(stb.st_rdev);
 679                 }
 680         }
 681
 682         rv = 0;
 683         switch(mode) {
 684         case MANAGE:
 685                 /* readonly, add/remove, readwrite, runstop */
 686                 if (readonly>0)
 687                         rv = Manage_ro(devlist->devname, mdfd, readonly);
 688                 if (!rv && devs_found>1)
 689                         rv = Manage_subdevs(devlist->devname, mdfd,
 690                                             devlist->next);
 691                 if (!rv && readonly < 0)
 692                         rv = Manage_ro(devlist->devname, mdfd, readonly);
 693                 if (!rv && runstop)
 694                         rv = Manage_runstop(devlist->devname, mdfd, runstop);
 695                 break;
 696         case ASSEMBLE:
 697                 if (devs_found == 1 && ident.uuid_set == 0 &&
 698                     ident.super_minor == UnSet && !scan ) {
 699                         /* Only a device has been given, so get details from config file */
 700                         mddev_ident_t array_ident = conf_get_ident(configfile, devlist->devname);
 701                         if (array_ident == NULL) {
 702                                 fprintf(stderr, Name ": %s not identified in config file.\n",
 703                                         devlist->devname);
 704                                 rv |= 1;
 705                         } else {
 706                                 mdfd = open_mddev(devlist->devname, array_ident->autof);
 707                                 if (mdfd < 0)
 708                                         rv |= 1;
 709                                 else {
 710                                         rv |= Assemble(devlist->devname, mdfd, array_ident, configfile,
 711                                                        NULL,
 712                                                        readonly, runstop, update, verbose, force);
 713                                         close(mdfd);
 714                                 }
 715                         }
 716                 } else if (!scan)
 717                         rv = Assemble(devlist->devname, mdfd, &ident, configfile,
 718                                       devlist->next,
 719                                       readonly, runstop, update, verbose, force);
 720                 else if (devs_found>0) {
 721                         if (update && devs_found > 1) {
 722                                 fprintf(stderr, Name ": can only update a single array at a time\n");
 723                                 exit(1);
 724                         }
 725                         for (dv = devlist ; dv ; dv=dv->next) {
 726                                 mddev_ident_t array_ident = conf_get_ident(configfile, dv->devname);
 727                                 if (array_ident == NULL) {
 728                                         fprintf(stderr, Name ": %s not identified in config file.\n",
 729                                                 dv->devname);
 730                                         rv |= 1;
 731                                         continue;
 732                                 }
 733                                 mdfd = open_mddev(dv->devname, array_ident->autof);
 734                                 if (mdfd < 0) {
 735                                         rv |= 1;
 736                                         continue;
 737                                 }
 738                                 rv |= Assemble(dv->devname, mdfd, array_ident, configfile,
 739                                                NULL,
 740                                                readonly, runstop, update, verbose, force);
 741                                 close(mdfd);
 742                         }
 743                 } else {
 744                         mddev_ident_t array_list =  conf_get_ident(configfile, NULL);
 745                         if (!array_list) {
 746                                 fprintf(stderr, Name ": No arrays found in config file\n");
 747                                 rv = 1;
 748                         } else
 749                                 for (; array_list; array_list = array_list->next) {
 750                                         mdu_array_info_t array;
 751                                         mdfd = open_mddev(array_list->devname, array_list->autof);
 752                                         if (mdfd < 0) {
 753                                                 rv |= 1;
 754                                                 continue;
 755                                         }
 756                                         if (ioctl(mdfd, GET_ARRAY_INFO, &array)>=0)
 757                                                 /* already assembled, skip */
 758                                                 ;
 759                                         else
 760                                                 rv |= Assemble(array_list->devname, mdfd,
 761                                                                array_list, configfile,
 762                                                                NULL,
 763                                                                readonly, runstop, NULL, verbose, force);
 764                                         close(mdfd);
 765                                 }
 766                 }
 767                 break;
 768         case BUILD:
 769                 rv = Build(devlist->devname, mdfd, chunk, level, layout, raiddisks, devlist->next, assume_clean);
 770                 break;
 771         case CREATE:
 772                 rv = Create(devlist->devname, mdfd, chunk, level, layout, size<0 ? 0 : size,
 773                             raiddisks, sparedisks,
 774                             devs_found-1, devlist->next, runstop, verbose, force);
 775                 break;
 776         case MISC:
 777
 778                 if (devmode == 'E') {
 779                         if (devlist == NULL && !scan) {
 780                                 fprintf(stderr, Name ": No devices to examine\n");
 781                                 exit(2);
 782                         }
 783                         if (devlist == NULL)
 784                                 devlist = conf_get_devs(configfile);
 785                         if (devlist == NULL) {
 786                                 fprintf(stderr, Name ": No devices listed in %s\n", configfile?configfile:DefaultConfFile);
 787                                 exit(1);
 788                         }
 789                         rv = Examine(devlist, scan?!verbose:brief, scan, SparcAdjust);
 790                 } else {
 791                         if (devlist == NULL) {
 792                                 if ((devmode == 'S' ||devmode=='D') && scan) {
 793                                         /* apply to all devices in /proc/mdstat */
 794                                         struct mdstat_ent *ms = mdstat_read(0);
 795                                         struct mdstat_ent *e;
 796                                         if (devmode == 'S') {
 797                                                 /* reverse order so that arrays made of arrays are stopped properly */
 798                                                 struct mdstat_ent *sm = NULL;
 799                                                 while ((e=ms) != NULL) {
 800                                                         ms = e->next;
 801                                                         e->next = sm;
 802                                                         sm = e;
 803                                                 }
 804                                                 ms = sm;
 805                                         }
 806                                         for (e=ms ; e ; e=e->next) {
 807                                                 char *name = get_md_name(e->devnum);
 808
 809                                                 if (!name) {
 810                                                         fprintf(stderr, Name ": cannot find device file for %s\n",
 811                                                                 e->dev);
 812                                                         continue;
 813                                                 }
 814                                                 if (devmode == 'D')
 815                                                         rv |= Detail(name, !verbose, test);
 816                                                 else if (devmode=='S') {
 817                                                         mdfd = open_mddev(name, 0);
 818                                                         if (mdfd >= 0) {
 819                                                                 rv |= Manage_runstop(name, mdfd, -1);
 820                                                                 close(mdfd);
 821                                                         }
 822                                                 }
 823                                                 put_md_name(name);
 824                                         }
 825                                 } else {
 826                                         fprintf(stderr, Name ": No devices given.\n");
 827                                         exit(2);
 828                                 }
 829                         }
 830                         for (dv=devlist ; dv; dv=dv->next) {
 831                                 switch(dv->disposition) {
 832                                 case 'D':
 833                                         rv |= Detail(dv->devname, brief, test); continue;
 834                                 case 'K': /* Zero superblock */
 835                                         rv |= Kill(dv->devname, force); continue;
 836                                 case 'Q':
 837                                         rv |= Query(dv->devname); continue;
 838                                 }
 839                                 mdfd = open_mddev(dv->devname, 0);
 840                                 if (mdfd>=0) {
 841                                         switch(dv->disposition) {
 842                                         case 'R':
 843                                                 rv |= Manage_runstop(dv->devname, mdfd, 1); break;
 844                                         case 'S':
 845                                                 rv |= Manage_runstop(dv->devname, mdfd, -1); break;
 846                                         case 'o':
 847                                                 rv |= Manage_ro(dv->devname, mdfd, 1); break;
 848                                         case 'w':
 849                                                 rv |= Manage_ro(dv->devname, mdfd, -1); break;
 850                                         }
 851                                         close(mdfd);
 852                                 }
 853                         }
 854                 }
 855                 break;
 856         case MONITOR:
 857                 if (!devlist && !scan) {
 858                         fprintf(stderr, Name ": Cannot monitor: need --scan or at least one device\n");
 859                         rv = 1;
 860                         break;
 861                 }
 862                 if (pidfile && !daemonise) {
 863                         fprintf(stderr, Name ": Cannot write a pid file when not in daemon mode\n");
 864                         rv = 1;
 865                         break;
 866                 }
 867                 rv= Monitor(devlist, mailaddr, program,
 868                             delay?delay:60, daemonise, scan, oneshot, configfile, test, pidfile);
 869                 break;
 870
 871         case GROW:
 872                 if (devs_found > 1) {
 873
 874                         /* must be '-a'. */
 875                         if (size >= 0 || raiddisks) {
 876                                 fprintf(stderr, Name ": --size, --raiddisks, and --add are exclusing in --grow mode\n");
 877                                 rv = 1;
 878                                 break;
 879                         }
 880                         for (dv=devlist->next; dv ; dv=dv->next) {
 881                                 rv = Grow_Add_device(devlist->devname, mdfd, dv->devname);
 882                                 if (rv)
 883                                         break;
 884                         }
 885                 } else if ((size >= 0) + (raiddisks != 0) +  (layout != UnSet) > 1) {
 886                         fprintf(stderr, Name ": can change at most one of size, raiddisks, and layout\n");
 887                         rv = 1;
 888                         break;
 889                 } else if (layout != UnSet)
 890                         rv = Manage_reconfig(devlist->devname, mdfd, layout);
 891                 else if (size >= 0 || raiddisks)
 892                         rv = Manage_resize(devlist->devname, mdfd, size, raiddisks);
 893                 else
 894                         fprintf(stderr, Name ": no changes to --grow\n");
 895                 break;
 896         }
 897         exit(rv);
 898 }