Detail.c

   1 /*
   2  * mdadm - manage Linux "md" devices aka RAID arrays.
   3  *
   4  * Copyright (C) 2001-2012 Neil Brown <neilb@suse.de>
   5  *
   6  *
   7  *    This program is free software; you can redistribute it and/or modify
   8  *    it under the terms of the GNU General Public License as published by
   9  *    the Free Software Foundation; either version 2 of the License, or
  10  *    (at your option) any later version.
  11  *
  12  *    This program is distributed in the hope that it will be useful,
  13  *    but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  *    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15  *    GNU General Public License for more details.
  16  *
  17  *    You should have received a copy of the GNU General Public License
  18  *    along with this program; if not, write to the Free Software
  19  *    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  20  *
  21  *    Author: Neil Brown
  22  *    Email: <neilb@suse.de>
  23  */
  24
  25 #include        "mdadm.h"
  26 #include        "md_p.h"
  27 #include        "md_u.h"
  28 #include        <dirent.h>
  29
  30 int Detail(char *dev, struct context *c)
  31 {
  32         /*
  33          * Print out details for an md array by using
  34          * GET_ARRAY_INFO and GET_DISK_INFO ioctl calls
  35          */
  36
  37         int fd = open(dev, O_RDONLY);
  38         int vers;
  39         mdu_array_info_t array;
  40         mdu_disk_info_t *disks;
  41         int next;
  42         int d;
  43         time_t atime;
  44         char *str;
  45         char *devices = NULL;
  46         int spares = 0;
  47         struct stat stb;
  48         int is_26 = get_linux_version() >= 2006000;
  49         int is_rebuilding = 0;
  50         int failed = 0;
  51         struct supertype *st;
  52         char *subarray = NULL;
  53         int max_disks = MD_SB_DISKS; /* just a default */
  54         struct mdinfo *info = NULL;
  55         struct mdinfo *sra;
  56         struct mdinfo *subdev;
  57         char *member = NULL;
  58         char *container = NULL;
  59
  60         int rv = c->test ? 4 : 1;
  61         int avail_disks = 0;
  62         char *avail = NULL;
  63         int external;
  64         int inactive;
  65
  66         if (fd < 0) {
  67                 pr_err("cannot open %s: %s\n",
  68                         dev, strerror(errno));
  69                 return rv;
  70         }
  71         vers = md_get_version(fd);
  72         if (vers < 0) {
  73                 pr_err("%s does not appear to be an md device\n",
  74                         dev);
  75                 close(fd);
  76                 return rv;
  77         }
  78         if (vers < 9000) {
  79                 pr_err("cannot get detail for md device %s: driver version too old.\n",
  80                         dev);
  81                 close(fd);
  82                 return rv;
  83         }
  84         sra = sysfs_read(fd, NULL, GET_VERSION|GET_DEVS);
  85         external = (sra != NULL && sra->array.major_version == -1
  86                     && sra->array.minor_version == -2);
  87         st = super_by_fd(fd, &subarray);
  88         if (ioctl(fd, GET_ARRAY_INFO, &array) == 0) {
  89                 inactive = 0;
  90         } else if (errno == ENODEV) {
  91                 array = sra->array;
  92                 inactive = 1;
  93         } else {
  94                 pr_err("cannot get array detail for %s: %s\n",
  95                        dev, strerror(errno));
  96                 close(fd);
  97                 return rv;
  98         }
  99
 100         if (fstat(fd, &stb) != 0 && !S_ISBLK(stb.st_mode))
 101                 stb.st_rdev = 0;
 102         rv = 0;
 103
 104         if (st)
 105                 max_disks = st->max_devs;
 106
 107         if (subarray) {
 108                 /* This is a subarray of some container.
 109                  * We want the name of the container, and the member
 110                  */
 111                 int devid = devnm2devid(st->container_devnm);
 112                 int cfd, err;
 113
 114                 member = subarray;
 115                 container = map_dev_preferred(major(devid), minor(devid),
 116                                               1, c->prefer);
 117                 cfd = open_dev(st->container_devnm);
 118                 if (cfd >= 0) {
 119                         err = st->ss->load_container(st, cfd, NULL);
 120                         close(cfd);
 121                         if (err == 0)
 122                                 info = st->ss->container_content(st, subarray);
 123                 }
 124         }
 125
 126         /* try to load a superblock. Try sra->devs first, then try ioctl */
 127         if (st && !info) for (d = 0, subdev = sra ? sra->devs : NULL;
 128                               d < max_disks || subdev;
 129                               subdev ? (void)(subdev = subdev->next) : (void)(d++)){
 130                 mdu_disk_info_t disk;
 131                 char *dv;
 132                 int fd2;
 133                 int err;
 134                 if (subdev)
 135                         disk = subdev->disk;
 136                 else {
 137                         disk.number = d;
 138                         if (ioctl(fd, GET_DISK_INFO, &disk) < 0)
 139                                 continue;
 140                         if (d >= array.raid_disks &&
 141                             disk.major == 0 &&
 142                             disk.minor == 0)
 143                                 continue;
 144                 }
 145
 146                 if (array.raid_disks > 0 &&
 147                     (disk.state & (1 << MD_DISK_ACTIVE)) == 0)
 148                         continue;
 149
 150                 dv = map_dev(disk.major, disk.minor, 1);
 151                 if (!dv)
 152                         continue;
 153
 154                 fd2 = dev_open(dv, O_RDONLY);
 155                 if (fd2 < 0)
 156                         continue;
 157
 158                 if (st->sb)
 159                         st->ss->free_super(st);
 160
 161                 err = st->ss->load_super(st, fd2, NULL);
 162                 close(fd2);
 163                 if (err)
 164                         continue;
 165                 if (info)
 166                         free(info);
 167                 if (subarray)
 168                         info = st->ss->container_content(st, subarray);
 169                 else {
 170                         info = xmalloc(sizeof(*info));
 171                         st->ss->getinfo_super(st, info, NULL);
 172                 }
 173                 if (!info)
 174                         continue;
 175
 176                 if (array.raid_disks != 0 && /* container */
 177                     (info->array.ctime != array.ctime ||
 178                      info->array.level != array.level)) {
 179                         st->ss->free_super(st);
 180                         continue;
 181                 }
 182                 /* some formats (imsm) have free-floating-spares
 183                  * with a uuid of uuid_zero, they don't
 184                  * have very good info about the rest of the
 185                  * container, so keep searching when
 186                  * encountering such a device.  Otherwise, stop
 187                  * after the first successful call to
 188                  * ->load_super.
 189                  */
 190                 if (memcmp(uuid_zero,
 191                            info->uuid,
 192                            sizeof(uuid_zero)) == 0) {
 193                         st->ss->free_super(st);
 194                         continue;
 195                 }
 196                 break;
 197         }
 198
 199         /* Ok, we have some info to print... */
 200         str = map_num(pers, array.level);
 201
 202         if (c->export) {
 203                 if (array.raid_disks) {
 204                         if (str)
 205                                 printf("MD_LEVEL=%s\n", str);
 206                         printf("MD_DEVICES=%d\n", array.raid_disks);
 207                 } else {
 208                         if (!inactive)
 209                                 printf("MD_LEVEL=container\n");
 210                         printf("MD_DEVICES=%d\n", array.nr_disks);
 211                 }
 212                 if (container) {
 213                         printf("MD_CONTAINER=%s\n", container);
 214                         printf("MD_MEMBER=%s\n", member);
 215                 } else {
 216                         if (sra && sra->array.major_version < 0)
 217                                 printf("MD_METADATA=%s\n", sra->text_version);
 218                         else
 219                                 printf("MD_METADATA=%d.%d\n",
 220                                        array.major_version, array.minor_version);
 221                 }
 222
 223                 if (st && st->sb && info) {
 224                         char nbuf[64];
 225                         struct map_ent *mp, *map = NULL;
 226
 227                         fname_from_uuid(st, info, nbuf, ':');
 228                         printf("MD_UUID=%s\n", nbuf+5);
 229                         mp = map_by_uuid(&map, info->uuid);
 230                         if (mp && mp->path &&
 231                             strncmp(mp->path, "/dev/md/", 8) == 0) {
 232                                 printf("MD_DEVNAME=");
 233                                 print_escape(mp->path+8);
 234                                 putchar('\n');
 235                         }
 236
 237                         if (st->ss->export_detail_super)
 238                                 st->ss->export_detail_super(st);
 239                 } else {
 240                         struct map_ent *mp, *map = NULL;
 241                         char nbuf[64];
 242                         mp = map_by_devnm(&map, fd2devnm(fd));
 243                         if (mp) {
 244                                 __fname_from_uuid(mp->uuid, 0, nbuf, ':');
 245                                 printf("MD_UUID=%s\n", nbuf+5);
 246                         }
 247                         if (mp && mp->path &&
 248                             strncmp(mp->path, "/dev/md/", 8) == 0) {
 249                                 printf("MD_DEVNAME=");
 250                                 print_escape(mp->path+8);
 251                                 putchar('\n');
 252                         }
 253                 }
 254                 goto out;
 255         }
 256
 257         disks = xmalloc(max_disks * sizeof(mdu_disk_info_t));
 258         for (d = 0; d < max_disks; d++) {
 259                 disks[d].state = (1<<MD_DISK_REMOVED);
 260                 disks[d].major = disks[d].minor = 0;
 261                 disks[d].number = disks[d].raid_disk = d;
 262         }
 263
 264         next = array.raid_disks*2;
 265         if (inactive) {
 266                 struct mdinfo *mdi;
 267                 if (sra != NULL)
 268                         for (mdi = sra->devs; mdi; mdi = mdi->next) {
 269                                 disks[next++] = mdi->disk;
 270                                 disks[next-1].number = -1;
 271                         }
 272         } else for (d = 0; d < max_disks; d++) {
 273                 mdu_disk_info_t disk;
 274                 disk.number = d;
 275                 if (ioctl(fd, GET_DISK_INFO, &disk) < 0) {
 276                         if (d < array.raid_disks)
 277                                 pr_err("cannot get device detail for device %d: %s\n",
 278                                         d, strerror(errno));
 279                         continue;
 280                 }
 281                 if (disk.major == 0 && disk.minor == 0)
 282                         continue;
 283                 if (disk.raid_disk >= 0 && disk.raid_disk < array.raid_disks
 284                     && disks[disk.raid_disk*2].state == (1<<MD_DISK_REMOVED))
 285                         disks[disk.raid_disk*2] = disk;
 286                 else if (disk.raid_disk >= 0 && disk.raid_disk < array.raid_disks
 287                          && disks[disk.raid_disk*2+1].state == (1<<MD_DISK_REMOVED))
 288                         disks[disk.raid_disk*2+1] = disk;
 289                 else if (next < max_disks)
 290                         disks[next++] = disk;
 291         }
 292
 293         avail = xcalloc(array.raid_disks, 1);
 294
 295         for (d= 0; d < array.raid_disks; d++) {
 296
 297                 if ((disks[d*2].state & (1<<MD_DISK_SYNC)) ||
 298                     (disks[d*2+1].state & (1<<MD_DISK_SYNC))) {
 299                         avail_disks ++;
 300                         avail[d] = 1;
 301                 }
 302         }
 303
 304         if (c->brief) {
 305                 mdu_bitmap_file_t bmf;
 306                 printf("%sARRAY %s", inactive ? "INACTIVE-":"", dev);
 307                 if (c->verbose > 0) {
 308                         if (array.raid_disks)
 309                                 printf(" level=%s num-devices=%d",
 310                                        str?str:"-unknown-",
 311                                        array.raid_disks );
 312                         else if (!inactive)
 313                                 printf(" level=container num-devices=%d",
 314                                        array.nr_disks);
 315                         else
 316                                 printf(" num-devices=%d", array.nr_disks);
 317                 }
 318                 if (container) {
 319                         printf(" container=%s", container);
 320                         printf(" member=%s", member);
 321                 } else {
 322                         if (sra && sra->array.major_version < 0)
 323                                 printf(" metadata=%s", sra->text_version);
 324                         else
 325                                 printf(" metadata=%d.%d",
 326                                        array.major_version, array.minor_version);
 327                 }
 328
 329                 /* Only try GET_BITMAP_FILE for 0.90.01 and later */
 330                 if (vers >= 9001 &&
 331                     ioctl(fd, GET_BITMAP_FILE, &bmf) == 0 &&
 332                     bmf.pathname[0]) {
 333                         printf(" bitmap=%s", bmf.pathname);
 334                 }
 335         } else {
 336                 mdu_bitmap_file_t bmf;
 337                 unsigned long long larray_size;
 338                 struct mdstat_ent *ms = mdstat_read(0, 0);
 339                 struct mdstat_ent *e;
 340                 char *devnm;
 341
 342                 devnm = stat2devnm(&stb);
 343                 for (e=ms; e; e=e->next)
 344                         if (strcmp(e->devnm, devnm) == 0)
 345                                 break;
 346                 if (!get_dev_size(fd, NULL, &larray_size))
 347                         larray_size = 0;
 348
 349                 printf("%s:\n", dev);
 350
 351                 if (container)
 352                         printf("      Container : %s, member %s\n", container, member);
 353                 else {
 354                 if (sra && sra->array.major_version < 0)
 355                         printf("        Version : %s\n", sra->text_version);
 356                 else
 357                         printf("        Version : %d.%d\n",
 358                                array.major_version, array.minor_version);
 359                 }
 360
 361                 atime = array.ctime;
 362                 if (atime)
 363                         printf("  Creation Time : %.24s\n", ctime(&atime));
 364                 if (array.raid_disks == 0 && external)
 365                         str = "container";
 366                 if (str)
 367                         printf("     Raid Level : %s\n", str);
 368                 if (larray_size)
 369                         printf("     Array Size : %llu%s\n", (larray_size>>10),
 370                                human_size(larray_size));
 371                 if (array.level >= 1) {
 372                         if (sra)
 373                                 array.major_version = sra->array.major_version;
 374                         if (array.major_version != 0 &&
 375                             (larray_size >= 0xFFFFFFFFULL|| array.size == 0)) {
 376                                 unsigned long long dsize = get_component_size(fd);
 377                                 if (dsize > 0)
 378                                         printf("  Used Dev Size : %llu%s\n",
 379                                                dsize/2,
 380                                          human_size((long long)dsize<<9));
 381                                 else
 382                                         printf("  Used Dev Size : unknown\n");
 383                         } else
 384                                 printf("  Used Dev Size : %d%s\n", array.size,
 385                                        human_size((long long)array.size<<10));
 386                 }
 387                 if (array.raid_disks)
 388                         printf("   Raid Devices : %d\n", array.raid_disks);
 389                 printf("  Total Devices : %d\n", array.nr_disks);
 390                 if (!container &&
 391                     ((sra == NULL && array.major_version == 0) ||
 392                      (sra && sra->array.major_version == 0)))
 393                         printf("Preferred Minor : %d\n", array.md_minor);
 394                 if (sra == NULL || sra->array.major_version >= 0)
 395                         printf("    Persistence : Superblock is %spersistent\n",
 396                                array.not_persistent?"not ":"");
 397                 printf("\n");
 398                 /* Only try GET_BITMAP_FILE for 0.90.01 and later */
 399                 if (vers >= 9001 &&
 400                     ioctl(fd, GET_BITMAP_FILE, &bmf) == 0 &&
 401                     bmf.pathname[0]) {
 402                         printf("  Intent Bitmap : %s\n", bmf.pathname);
 403                         printf("\n");
 404                 } else if (array.state & (1<<MD_SB_BITMAP_PRESENT))
 405                         printf("  Intent Bitmap : Internal\n\n");
 406                 atime = array.utime;
 407                 if (atime)
 408                         printf("    Update Time : %.24s\n", ctime(&atime));
 409                 if (array.raid_disks) {
 410                         static char *sync_action[] = {
 411                                 ", recovering",  ", resyncing",
 412                                 ", reshaping",   ", checking"  };
 413                         char *st;
 414                         if (avail_disks == array.raid_disks)
 415                                 st = "";
 416                         else if (!enough(array.level, array.raid_disks,
 417                                          array.layout, 1, avail))
 418                                 st = ", FAILED";
 419                         else
 420                                 st = ", degraded";
 421
 422                         printf("          State : %s%s%s%s%s%s \n",
 423                                (array.state&(1<<MD_SB_CLEAN))?"clean":"active", st,
 424                                (!e || (e->percent < 0 && e->percent != RESYNC_PENDING &&
 425                                e->percent != RESYNC_DELAYED)) ? "" : sync_action[e->resync],
 426                                larray_size ? "": ", Not Started",
 427                                e->percent == RESYNC_DELAYED ? " (DELAYED)": "",
 428                                e->percent == RESYNC_PENDING ? " (PENDING)": "");
 429                 } else if (inactive) {
 430                         printf("          State : inactive\n");
 431                 }
 432                 if (array.raid_disks)
 433                         printf(" Active Devices : %d\n", array.active_disks);
 434                 if (array.working_disks > 0)
 435                         printf("Working Devices : %d\n", array.working_disks);
 436                 if (array.raid_disks) {
 437                         printf(" Failed Devices : %d\n", array.failed_disks);
 438                         printf("  Spare Devices : %d\n", array.spare_disks);
 439                 }
 440                 printf("\n");
 441                 if (array.level == 5) {
 442                         str = map_num(r5layout, array.layout);
 443                         printf("         Layout : %s\n", str?str:"-unknown-");
 444                 }
 445                 if (array.level == 6) {
 446                         str = map_num(r6layout, array.layout);
 447                         printf("         Layout : %s\n", str?str:"-unknown-");
 448                 }
 449                 if (array.level == 10) {
 450                         printf("         Layout :");
 451                         print_r10_layout(array.layout);
 452                         printf("\n");
 453                 }
 454                 switch (array.level) {
 455                 case 0:
 456                 case 4:
 457                 case 5:
 458                 case 10:
 459                 case 6:
 460                         if (array.chunk_size)
 461                                 printf("     Chunk Size : %dK\n\n",
 462                                        array.chunk_size/1024);
 463                         break;
 464                 case -1:
 465                         printf("       Rounding : %dK\n\n", array.chunk_size/1024);
 466                         break;
 467                 default: break;
 468                 }
 469
 470                 if (e && e->percent >= 0) {
 471                         static char *sync_action[] = {
 472                                 "Rebuild", "Resync",
 473                                 "Reshape", "Check"};
 474                         printf(" %7s Status : %d%% complete\n", sync_action[e->resync], e->percent);
 475                         is_rebuilding = 1;
 476                 }
 477                 free_mdstat(ms);
 478
 479                 if ((st && st->sb) && (info && info->reshape_active)) {
 480 #if 0
 481 This is pretty boring
 482                         printf("  Reshape pos'n : %llu%s\n", (unsigned long long) info->reshape_progress<<9,
 483                                human_size((unsigned long long)info->reshape_progress<<9));
 484 #endif
 485                         if (info->delta_disks != 0)
 486                                 printf("  Delta Devices : %d, (%d->%d)\n",
 487                                        info->delta_disks,
 488                                        array.raid_disks - info->delta_disks,
 489                                        array.raid_disks);
 490                         if (info->new_level != array.level) {
 491                                 str = map_num(pers, info->new_level);
 492                                 printf("      New Level : %s\n", str?str:"-unknown-");
 493                         }
 494                         if (info->new_level != array.level ||
 495                             info->new_layout != array.layout) {
 496                                 if (info->new_level == 5) {
 497                                         str = map_num(r5layout, info->new_layout);
 498                                         printf("     New Layout : %s\n",
 499                                                str?str:"-unknown-");
 500                                 }
 501                                 if (info->new_level == 6) {
 502                                         str = map_num(r6layout, info->new_layout);
 503                                         printf("     New Layout : %s\n",
 504                                                str?str:"-unknown-");
 505                                 }
 506                                 if (info->new_level == 10) {
 507                                         printf("     New Layout : near=%d, %s=%d\n",
 508                                                info->new_layout&255,
 509                                                (info->new_layout&0x10000)?"offset":"far",
 510                                                (info->new_layout>>8)&255);
 511                                 }
 512                         }
 513                         if (info->new_chunk != array.chunk_size)
 514                                 printf("  New Chunksize : %dK\n", info->new_chunk/1024);
 515                         printf("\n");
 516                 } else if (e && e->percent >= 0)
 517                         printf("\n");
 518                 if (st && st->sb)
 519                         st->ss->detail_super(st, c->homehost);
 520
 521                 if (array.raid_disks == 0 && sra && sra->array.major_version == -1
 522                     && sra->array.minor_version == -2 && sra->text_version[0] != '/') {
 523                         /* This looks like a container.  Find any active arrays
 524                          * That claim to be a member.
 525                          */
 526                         DIR *dir = opendir("/sys/block");
 527                         struct dirent *de;
 528
 529                         printf("  Member Arrays :");
 530
 531                         while (dir && (de = readdir(dir)) != NULL) {
 532                                 char path[200];
 533                                 char vbuf[1024];
 534                                 int nlen = strlen(sra->sys_name);
 535                                 int devid;
 536                                 if (de->d_name[0] == '.')
 537                                         continue;
 538                                 sprintf(path, "/sys/block/%s/md/metadata_version",
 539                                         de->d_name);
 540                                 if (load_sys(path, vbuf) < 0)
 541                                         continue;
 542                                 if (strncmp(vbuf, "external:", 9) != 0 ||
 543                                     !is_subarray(vbuf+9) ||
 544                                     strncmp(vbuf+10, sra->sys_name, nlen) != 0 ||
 545                                     vbuf[10+nlen] != '/')
 546                                         continue;
 547                                 devid = devnm2devid(de->d_name);
 548                                 printf(" %s", map_dev_preferred(
 549                                                major(devid),
 550                                                minor(devid), 1, c->prefer));
 551                         }
 552                         if (dir)
 553                                 closedir(dir);
 554                         printf("\n\n");
 555                 }
 556
 557                 if (array.raid_disks)
 558                         printf("    Number   Major   Minor   RaidDevice State\n");
 559                 else
 560                         printf("    Number   Major   Minor   RaidDevice\n");
 561         }
 562         free(info);
 563
 564         for (d= 0; d < max_disks; d++) {
 565                 char *dv;
 566                 mdu_disk_info_t disk = disks[d];
 567
 568                 if (d >= array.raid_disks*2 &&
 569                     disk.major == 0 &&
 570                     disk.minor == 0)
 571                         continue;
 572                 if ((d & 1) &&
 573                     disk.major == 0 &&
 574                     disk.minor == 0)
 575                         continue;
 576                 if (!c->brief) {
 577                         if (d == array.raid_disks*2) printf("\n");
 578                         if (disk.number < 0)
 579                                 printf("       -   %5d    %5d        -     ",
 580                                        disk.major, disk.minor);
 581                         else if (disk.raid_disk < 0)
 582                                 printf("   %5d   %5d    %5d        -     ",
 583                                        disk.number, disk.major, disk.minor);
 584                         else
 585                                 printf("   %5d   %5d    %5d    %5d     ",
 586                                        disk.number, disk.major, disk.minor, disk.raid_disk);
 587                 }
 588                 if (!c->brief && array.raid_disks) {
 589
 590                         if (disk.state & (1<<MD_DISK_FAULTY)) {
 591                                 printf(" faulty");
 592                                 if (disk.raid_disk < array.raid_disks &&
 593                                     disk.raid_disk >= 0)
 594                                         failed++;
 595                         }
 596                         if (disk.state & (1<<MD_DISK_ACTIVE)) printf(" active");
 597                         if (disk.state & (1<<MD_DISK_SYNC)) {
 598                                 printf(" sync");
 599                                 if (array.level == 10 && (array.layout & ~0x1FFFF) == 0) {
 600                                         int nc = array.layout & 0xff;
 601                                         int fc = (array.layout >> 8) & 0xff;
 602                                         int copies = nc*fc;
 603                                         if (fc == 1 && array.raid_disks % copies == 0 && copies <= 26) {
 604                                                 /* We can divide the devices into 'sets' */
 605                                                 int set = disk.raid_disk % copies;
 606                                                 printf(" set-%c", set + 'A');
 607                                         }
 608                                 }
 609                         }
 610                         if (disk.state & (1<<MD_DISK_REMOVED)) printf(" removed");
 611                         if (disk.state & (1<<MD_DISK_WRITEMOSTLY)) printf(" writemostly");
 612                         if ((disk.state &
 613                              ((1<<MD_DISK_ACTIVE)|(1<<MD_DISK_SYNC)
 614                               |(1<<MD_DISK_REMOVED)|(1<<MD_DISK_FAULTY)))
 615                             == 0) {
 616                                 printf(" spare");
 617                                 if (is_26) {
 618                                         if (disk.raid_disk < array.raid_disks && disk.raid_disk >= 0)
 619                                                 printf(" rebuilding");
 620                                 } else if (is_rebuilding && failed) {
 621                                         /* Taking a bit of a risk here, we remove the
 622                                          * device from the array, and then put it back.
 623                                          * If this fails, we are rebuilding
 624                                          */
 625                                         int err = ioctl(fd, HOT_REMOVE_DISK, makedev(disk.major, disk.minor));
 626                                         if (err == 0) ioctl(fd, HOT_ADD_DISK, makedev(disk.major, disk.minor));
 627                                         if (err && errno ==  EBUSY)
 628                                                 printf(" rebuilding");
 629                                 }
 630                         }
 631                 }
 632                 if (disk.state == 0) spares++;
 633                 if (c->test && d < array.raid_disks
 634                     && !(disk.state & (1<<MD_DISK_SYNC)))
 635                         rv |= 1;
 636                 dv=map_dev_preferred(disk.major, disk.minor, 0, c->prefer);
 637                 if (dv != NULL) {
 638                         if (c->brief) {
 639                                 if (devices) {
 640                                         devices = xrealloc(devices,
 641                                                           strlen(devices)+1+strlen(dv)+1);
 642                                         strcat(strcat(devices,","),dv);
 643                                 } else
 644                                         devices = xstrdup(dv);
 645                         } else
 646                                 printf("   %s", dv);
 647                 }
 648                 if (!c->brief) printf("\n");
 649         }
 650         if (spares && c->brief && array.raid_disks) printf(" spares=%d", spares);
 651         if (c->brief && st && st->sb)
 652                 st->ss->brief_detail_super(st);
 653         if (st)
 654                 st->ss->free_super(st);
 655
 656         if (c->brief && c->verbose > 0 && devices) printf("\n   devices=%s", devices);
 657         if (c->brief)
 658                 printf("\n");
 659         if (c->test &&
 660             !enough(array.level, array.raid_disks, array.layout,
 661                     1, avail))
 662                 rv = 2;
 663
 664         free(disks);
 665 out:
 666         close(fd);
 667         free(subarray);
 668         free(avail);
 669         sysfs_free(sra);
 670         return rv;
 671 }
 672
 673 int Detail_Platform(struct superswitch *ss, int scan, int verbose, int export, char *controller_path)
 674 {
 675         /* display platform capabilities for the given metadata format
 676          * 'scan' in this context means iterate over all metadata types
 677          */
 678         int i;
 679         int err = 1;
 680
 681         if (ss && export && ss->export_detail_platform)
 682                 err = ss->export_detail_platform(verbose, controller_path);
 683         else if (ss && ss->detail_platform)
 684                 err = ss->detail_platform(verbose, 0, controller_path);
 685         else if (ss) {
 686                 if (verbose > 0)
 687                         pr_err("%s metadata is platform independent\n",
 688                                 ss->name ? : "[no name]");
 689         } else if (!scan) {
 690                 if (verbose > 0)
 691                         pr_err("specify a metadata type or --scan\n");
 692         }
 693
 694         if (!scan)
 695                 return err;
 696
 697         err = 0;
 698         for (i = 0; superlist[i]; i++) {
 699                 struct superswitch *meta = superlist[i];
 700
 701                 if (meta == ss)
 702                         continue;
 703                 if (verbose > 0)
 704                         pr_err("checking metadata %s\n",
 705                                 meta->name ? : "[no name]");
 706                 if (!meta->detail_platform) {
 707                         if (verbose > 0)
 708                                 pr_err("%s metadata is platform independent\n",
 709                                         meta->name ? : "[no name]");
 710                 } else if (export && meta->export_detail_platform) {
 711                         err |= meta->export_detail_platform(verbose, controller_path);
 712                 } else
 713                         err |= meta->detail_platform(verbose, 0, controller_path);
 714         }
 715
 716         return err;
 717 }