Detail.c

   1 /*
   2  * mdadm - manage Linux "md" devices aka RAID arrays.
   3  *
   4  * Copyright (C) 2001-2013 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 static int cmpstringp(const void *p1, const void *p2)
  31 {
  32         return strcmp(* (char * const *) p1, * (char * const *) p2);
  33 }
  34
  35 static int add_device(const char *dev, char ***p_devices,
  36                       int *p_max_devices, int n_devices)
  37 {
  38         if (n_devices + 1 >= *p_max_devices) {
  39                 *p_max_devices += 16;
  40                 *p_devices = xrealloc(*p_devices, *p_max_devices *
  41                                       sizeof(**p_devices));
  42                 if (!*p_devices) {
  43                         *p_max_devices = 0;
  44                         return 0;
  45                 }
  46         };
  47         (*p_devices)[n_devices] = xstrdup(dev);
  48         return n_devices + 1;
  49 }
  50
  51 int Detail(char *dev, struct context *c)
  52 {
  53         /*
  54          * Print out details for an md array by using
  55          * GET_ARRAY_INFO and GET_DISK_INFO ioctl calls
  56          */
  57
  58         int fd = open(dev, O_RDONLY);
  59         int vers;
  60         mdu_array_info_t array;
  61         mdu_disk_info_t *disks;
  62         int next;
  63         int d;
  64         time_t atime;
  65         char *str;
  66         char **devices = NULL;
  67         int max_devices = 0, n_devices = 0;
  68         int spares = 0;
  69         struct stat stb;
  70         int is_26 = get_linux_version() >= 2006000;
  71         int is_rebuilding = 0;
  72         int failed = 0;
  73         struct supertype *st;
  74         char *subarray = NULL;
  75         int max_disks = MD_SB_DISKS; /* just a default */
  76         struct mdinfo *info = NULL;
  77         struct mdinfo *sra;
  78         struct mdinfo *subdev;
  79         char *member = NULL;
  80         char *container = NULL;
  81
  82         int rv = c->test ? 4 : 1;
  83         int avail_disks = 0;
  84         char *avail = NULL;
  85         int external;
  86         int inactive;
  87
  88         if (fd < 0) {
  89                 pr_err("cannot open %s: %s\n",
  90                         dev, strerror(errno));
  91                 return rv;
  92         }
  93         vers = md_get_version(fd);
  94         if (vers < 0) {
  95                 pr_err("%s does not appear to be an md device\n",
  96                         dev);
  97                 close(fd);
  98                 return rv;
  99         }
 100         if (vers < 9000) {
 101                 pr_err("cannot get detail for md device %s: driver version too old.\n",
 102                         dev);
 103                 close(fd);
 104                 return rv;
 105         }
 106         sra = sysfs_read(fd, NULL, GET_VERSION|GET_DEVS);
 107         external = (sra != NULL && sra->array.major_version == -1
 108                     && sra->array.minor_version == -2);
 109         st = super_by_fd(fd, &subarray);
 110         if (ioctl(fd, GET_ARRAY_INFO, &array) == 0) {
 111                 inactive = 0;
 112         } else if (errno == ENODEV && sra) {
 113                 array = sra->array;
 114                 inactive = 1;
 115         } else {
 116                 pr_err("cannot get array detail for %s: %s\n",
 117                        dev, strerror(errno));
 118                 close(fd);
 119                 return rv;
 120         }
 121
 122         if (fstat(fd, &stb) != 0 && !S_ISBLK(stb.st_mode))
 123                 stb.st_rdev = 0;
 124         rv = 0;
 125
 126         if (st)
 127                 max_disks = st->max_devs;
 128
 129         if (subarray) {
 130                 /* This is a subarray of some container.
 131                  * We want the name of the container, and the member
 132                  */
 133                 dev_t devid = devnm2devid(st->container_devnm);
 134                 int cfd, err;
 135
 136                 member = subarray;
 137                 container = map_dev_preferred(major(devid), minor(devid),
 138                                               1, c->prefer);
 139                 cfd = open_dev(st->container_devnm);
 140                 if (cfd >= 0) {
 141                         err = st->ss->load_container(st, cfd, NULL);
 142                         close(cfd);
 143                         if (err == 0)
 144                                 info = st->ss->container_content(st, subarray);
 145                 }
 146         }
 147
 148         /* try to load a superblock. Try sra->devs first, then try ioctl */
 149         if (st && !info) for (d = 0, subdev = sra ? sra->devs : NULL;
 150                               d < max_disks || subdev;
 151                               subdev ? (void)(subdev = subdev->next) : (void)(d++)){
 152                 mdu_disk_info_t disk;
 153                 char *dv;
 154                 int fd2;
 155                 int err;
 156                 if (subdev)
 157                         disk = subdev->disk;
 158                 else {
 159                         disk.number = d;
 160                         if (ioctl(fd, GET_DISK_INFO, &disk) < 0)
 161                                 continue;
 162                         if (d >= array.raid_disks &&
 163                             disk.major == 0 &&
 164                             disk.minor == 0)
 165                                 continue;
 166                 }
 167
 168                 if (array.raid_disks > 0 &&
 169                     (disk.state & (1 << MD_DISK_ACTIVE)) == 0)
 170                         continue;
 171
 172                 dv = map_dev(disk.major, disk.minor, 1);
 173                 if (!dv)
 174                         continue;
 175
 176                 fd2 = dev_open(dv, O_RDONLY);
 177                 if (fd2 < 0)
 178                         continue;
 179
 180                 if (st->sb)
 181                         st->ss->free_super(st);
 182
 183                 err = st->ss->load_super(st, fd2, NULL);
 184                 close(fd2);
 185                 if (err)
 186                         continue;
 187                 if (info)
 188                         free(info);
 189                 if (subarray)
 190                         info = st->ss->container_content(st, subarray);
 191                 else {
 192                         info = xmalloc(sizeof(*info));
 193                         st->ss->getinfo_super(st, info, NULL);
 194                 }
 195                 if (!info)
 196                         continue;
 197
 198                 if (array.raid_disks != 0 && /* container */
 199                     (info->array.ctime != array.ctime ||
 200                      info->array.level != array.level)) {
 201                         st->ss->free_super(st);
 202                         continue;
 203                 }
 204                 /* some formats (imsm) have free-floating-spares
 205                  * with a uuid of uuid_zero, they don't
 206                  * have very good info about the rest of the
 207                  * container, so keep searching when
 208                  * encountering such a device.  Otherwise, stop
 209                  * after the first successful call to
 210                  * ->load_super.
 211                  */
 212                 if (memcmp(uuid_zero,
 213                            info->uuid,
 214                            sizeof(uuid_zero)) == 0) {
 215                         st->ss->free_super(st);
 216                         continue;
 217                 }
 218                 break;
 219         }
 220
 221         /* Ok, we have some info to print... */
 222         str = map_num(pers, array.level);
 223
 224         if (c->export) {
 225                 if (array.raid_disks) {
 226                         if (str)
 227                                 printf("MD_LEVEL=%s\n", str);
 228                         printf("MD_DEVICES=%d\n", array.raid_disks);
 229                 } else {
 230                         if (!inactive)
 231                                 printf("MD_LEVEL=container\n");
 232                         printf("MD_DEVICES=%d\n", array.nr_disks);
 233                 }
 234                 if (container) {
 235                         printf("MD_CONTAINER=%s\n", container);
 236                         printf("MD_MEMBER=%s\n", member);
 237                 } else {
 238                         if (sra && sra->array.major_version < 0)
 239                                 printf("MD_METADATA=%s\n", sra->text_version);
 240                         else
 241                                 printf("MD_METADATA=%d.%d\n",
 242                                        array.major_version, array.minor_version);
 243                 }
 244
 245                 if (st && st->sb && info) {
 246                         char nbuf[64];
 247                         struct map_ent *mp, *map = NULL;
 248
 249                         fname_from_uuid(st, info, nbuf, ':');
 250                         printf("MD_UUID=%s\n", nbuf+5);
 251                         mp = map_by_uuid(&map, info->uuid);
 252                         if (mp && mp->path &&
 253                             strncmp(mp->path, "/dev/md/", 8) == 0) {
 254                                 printf("MD_DEVNAME=");
 255                                 print_escape(mp->path+8);
 256                                 putchar('\n');
 257                         }
 258
 259                         if (st->ss->export_detail_super)
 260                                 st->ss->export_detail_super(st);
 261                 } else {
 262                         struct map_ent *mp, *map = NULL;
 263                         char nbuf[64];
 264                         mp = map_by_devnm(&map, fd2devnm(fd));
 265                         if (mp) {
 266                                 __fname_from_uuid(mp->uuid, 0, nbuf, ':');
 267                                 printf("MD_UUID=%s\n", nbuf+5);
 268                         }
 269                         if (mp && mp->path &&
 270                             strncmp(mp->path, "/dev/md/", 8) == 0) {
 271                                 printf("MD_DEVNAME=");
 272                                 print_escape(mp->path+8);
 273                                 putchar('\n');
 274                         }
 275                 }
 276                 if (sra) {
 277                         struct mdinfo *mdi;
 278                         for (mdi  = sra->devs; mdi; mdi = mdi->next) {
 279                                 char *path =
 280                                         map_dev(mdi->disk.major,
 281                                                 mdi->disk.minor, 0);
 282
 283                                 if (mdi->disk.raid_disk >= 0)
 284                                         printf("MD_DEVICE_%s_ROLE=%d\n",
 285                                                mdi->sys_name+4,
 286                                                mdi->disk.raid_disk);
 287                                 else
 288                                         printf("MD_DEVICE_%s_ROLE=spare\n",
 289                                                mdi->sys_name+4);
 290                                 if (path)
 291                                         printf("MD_DEVICE_%s_DEV=%s\n",
 292                                                mdi->sys_name+4, path);
 293                         }
 294                 }
 295                 goto out;
 296         }
 297
 298         disks = xmalloc(max_disks * 2 * sizeof(mdu_disk_info_t));
 299         for (d = 0; d < max_disks * 2; d++) {
 300                 disks[d].state = (1<<MD_DISK_REMOVED);
 301                 disks[d].major = disks[d].minor = 0;
 302                 disks[d].number = -1;
 303                 disks[d].raid_disk = d/2;
 304         }
 305
 306         next = array.raid_disks*2;
 307         if (inactive) {
 308                 struct mdinfo *mdi;
 309                 if (sra != NULL)
 310                         for (mdi = sra->devs; mdi; mdi = mdi->next) {
 311                                 disks[next++] = mdi->disk;
 312                                 disks[next-1].number = -1;
 313                         }
 314         } else for (d = 0; d < max_disks; d++) {
 315                 mdu_disk_info_t disk;
 316                 disk.number = d;
 317                 if (ioctl(fd, GET_DISK_INFO, &disk) < 0) {
 318                         if (d < array.raid_disks)
 319                                 pr_err("cannot get device detail for device %d: %s\n",
 320                                         d, strerror(errno));
 321                         continue;
 322                 }
 323                 if (disk.major == 0 && disk.minor == 0)
 324                         continue;
 325                 if (disk.raid_disk >= 0 && disk.raid_disk < array.raid_disks
 326                     && disks[disk.raid_disk*2].state == (1<<MD_DISK_REMOVED)
 327                     && ((disk.state & (1<<MD_DISK_JOURNAL)) == 0))
 328                         disks[disk.raid_disk*2] = disk;
 329                 else if (disk.raid_disk >= 0 && disk.raid_disk < array.raid_disks
 330                          && disks[disk.raid_disk*2+1].state == (1<<MD_DISK_REMOVED)
 331                          && !(disk.state & (1<<MD_DISK_JOURNAL)))
 332                         disks[disk.raid_disk*2+1] = disk;
 333                 else if (next < max_disks*2)
 334                         disks[next++] = disk;
 335         }
 336
 337         avail = xcalloc(array.raid_disks, 1);
 338
 339         for (d= 0; d < array.raid_disks; d++) {
 340
 341                 if ((disks[d*2].state & (1<<MD_DISK_SYNC)) ||
 342                     (disks[d*2+1].state & (1<<MD_DISK_SYNC))) {
 343                         avail_disks ++;
 344                         avail[d] = 1;
 345                 } else
 346                         rv |= !! c->test;
 347         }
 348
 349         if (c->brief) {
 350                 mdu_bitmap_file_t bmf;
 351                 printf("%sARRAY %s", inactive ? "INACTIVE-":"", dev);
 352                 if (c->verbose > 0) {
 353                         if (array.raid_disks)
 354                                 printf(" level=%s num-devices=%d",
 355                                        str?str:"-unknown-",
 356                                        array.raid_disks );
 357                         else if (!inactive)
 358                                 printf(" level=container num-devices=%d",
 359                                        array.nr_disks);
 360                         else
 361                                 printf(" num-devices=%d", array.nr_disks);
 362                 }
 363                 if (container) {
 364                         printf(" container=%s", container);
 365                         printf(" member=%s", member);
 366                 } else {
 367                         if (sra && sra->array.major_version < 0)
 368                                 printf(" metadata=%s", sra->text_version);
 369                         else
 370                                 printf(" metadata=%d.%d",
 371                                        array.major_version, array.minor_version);
 372                 }
 373
 374                 /* Only try GET_BITMAP_FILE for 0.90.01 and later */
 375                 if (vers >= 9001 &&
 376                     ioctl(fd, GET_BITMAP_FILE, &bmf) == 0 &&
 377                     bmf.pathname[0]) {
 378                         printf(" bitmap=%s", bmf.pathname);
 379                 }
 380         } else {
 381                 mdu_bitmap_file_t bmf;
 382                 unsigned long long larray_size;
 383                 struct mdstat_ent *ms = mdstat_read(0, 0);
 384                 struct mdstat_ent *e;
 385                 char *devnm;
 386
 387                 devnm = stat2devnm(&stb);
 388                 for (e=ms; e; e=e->next)
 389                         if (strcmp(e->devnm, devnm) == 0)
 390                                 break;
 391                 if (!get_dev_size(fd, NULL, &larray_size))
 392                         larray_size = 0;
 393
 394                 printf("%s:\n", dev);
 395
 396                 if (container)
 397                         printf("      Container : %s, member %s\n", container, member);
 398                 else {
 399                 if (sra && sra->array.major_version < 0)
 400                         printf("        Version : %s\n", sra->text_version);
 401                 else
 402                         printf("        Version : %d.%d\n",
 403                                array.major_version, array.minor_version);
 404                 }
 405
 406                 atime = array.ctime;
 407                 if (atime)
 408                         printf("  Creation Time : %.24s\n", ctime(&atime));
 409                 if (array.raid_disks == 0 && external)
 410                         str = "container";
 411                 if (str)
 412                         printf("     Raid Level : %s\n", str);
 413                 if (larray_size)
 414                         printf("     Array Size : %llu%s\n", (larray_size>>10),
 415                                human_size(larray_size));
 416                 if (array.level >= 1) {
 417                         if (sra)
 418                                 array.major_version = sra->array.major_version;
 419                         if (array.major_version != 0 &&
 420                             (larray_size >= 0xFFFFFFFFULL|| array.size == 0)) {
 421                                 unsigned long long dsize = get_component_size(fd);
 422                                 if (dsize > 0)
 423                                         printf("  Used Dev Size : %llu%s\n",
 424                                                dsize/2,
 425                                          human_size((long long)dsize<<9));
 426                                 else
 427                                         printf("  Used Dev Size : unknown\n");
 428                         } else
 429                                 printf("  Used Dev Size : %lu%s\n",
 430                                        (unsigned long)array.size,
 431                                        human_size((unsigned long long)array.size<<10));
 432                 }
 433                 if (array.raid_disks)
 434                         printf("   Raid Devices : %d\n", array.raid_disks);
 435                 printf("  Total Devices : %d\n", array.nr_disks);
 436                 if (!container &&
 437                     ((sra == NULL && array.major_version == 0) ||
 438                      (sra && sra->array.major_version == 0)))
 439                         printf("Preferred Minor : %d\n", array.md_minor);
 440                 if (sra == NULL || sra->array.major_version >= 0)
 441                         printf("    Persistence : Superblock is %spersistent\n",
 442                                array.not_persistent?"not ":"");
 443                 printf("\n");
 444                 /* Only try GET_BITMAP_FILE for 0.90.01 and later */
 445                 if (vers >= 9001 &&
 446                     ioctl(fd, GET_BITMAP_FILE, &bmf) == 0 &&
 447                     bmf.pathname[0]) {
 448                         printf("  Intent Bitmap : %s\n", bmf.pathname);
 449                         printf("\n");
 450                 } else if (array.state & (1<<MD_SB_BITMAP_PRESENT))
 451                         printf("  Intent Bitmap : Internal\n\n");
 452                 atime = array.utime;
 453                 if (atime)
 454                         printf("    Update Time : %.24s\n", ctime(&atime));
 455                 if (array.raid_disks) {
 456                         static char *sync_action[] = {
 457                                 ", recovering",  ", resyncing",
 458                                 ", reshaping",   ", checking"  };
 459                         char *st;
 460                         if (avail_disks == array.raid_disks)
 461                                 st = "";
 462                         else if (!enough(array.level, array.raid_disks,
 463                                          array.layout, 1, avail))
 464                                 st = ", FAILED";
 465                         else
 466                                 st = ", degraded";
 467
 468                         printf("          State : %s%s%s%s%s%s \n",
 469                                (array.state&(1<<MD_SB_CLEAN))?"clean":"active", st,
 470                                (!e || (e->percent < 0 && e->percent != RESYNC_PENDING &&
 471                                e->percent != RESYNC_DELAYED)) ? "" : sync_action[e->resync],
 472                                larray_size ? "": ", Not Started",
 473                                (e && e->percent == RESYNC_DELAYED) ? " (DELAYED)": "",
 474                                (e && e->percent == RESYNC_PENDING) ? " (PENDING)": "");
 475                 } else if (inactive) {
 476                         printf("          State : inactive\n");
 477                 }
 478                 if (array.raid_disks)
 479                         printf(" Active Devices : %d\n", array.active_disks);
 480                 if (array.working_disks > 0)
 481                         printf("Working Devices : %d\n", array.working_disks);
 482                 if (array.raid_disks) {
 483                         printf(" Failed Devices : %d\n", array.failed_disks);
 484                         printf("  Spare Devices : %d\n", array.spare_disks);
 485                 }
 486                 printf("\n");
 487                 if (array.level == 5) {
 488                         str = map_num(r5layout, array.layout);
 489                         printf("         Layout : %s\n", str?str:"-unknown-");
 490                 }
 491                 if (array.level == 6) {
 492                         str = map_num(r6layout, array.layout);
 493                         printf("         Layout : %s\n", str?str:"-unknown-");
 494                 }
 495                 if (array.level == 10) {
 496                         printf("         Layout :");
 497                         print_r10_layout(array.layout);
 498                         printf("\n");
 499                 }
 500                 switch (array.level) {
 501                 case 0:
 502                 case 4:
 503                 case 5:
 504                 case 10:
 505                 case 6:
 506                         if (array.chunk_size)
 507                                 printf("     Chunk Size : %dK\n\n",
 508                                        array.chunk_size/1024);
 509                         break;
 510                 case -1:
 511                         printf("       Rounding : %dK\n\n", array.chunk_size/1024);
 512                         break;
 513                 default: break;
 514                 }
 515
 516                 if (e && e->percent >= 0) {
 517                         static char *sync_action[] = {
 518                                 "Rebuild", "Resync",
 519                                 "Reshape", "Check"};
 520                         printf(" %7s Status : %d%% complete\n", sync_action[e->resync], e->percent);
 521                         is_rebuilding = 1;
 522                 }
 523                 free_mdstat(ms);
 524
 525                 if ((st && st->sb) && (info && info->reshape_active)) {
 526 #if 0
 527 This is pretty boring
 528                         printf("  Reshape pos'n : %llu%s\n", (unsigned long long) info->reshape_progress<<9,
 529                                human_size((unsigned long long)info->reshape_progress<<9));
 530 #endif
 531                         if (info->delta_disks != 0)
 532                                 printf("  Delta Devices : %d, (%d->%d)\n",
 533                                        info->delta_disks,
 534                                        array.raid_disks - info->delta_disks,
 535                                        array.raid_disks);
 536                         if (info->new_level != array.level) {
 537                                 str = map_num(pers, info->new_level);
 538                                 printf("      New Level : %s\n", str?str:"-unknown-");
 539                         }
 540                         if (info->new_level != array.level ||
 541                             info->new_layout != array.layout) {
 542                                 if (info->new_level == 5) {
 543                                         str = map_num(r5layout, info->new_layout);
 544                                         printf("     New Layout : %s\n",
 545                                                str?str:"-unknown-");
 546                                 }
 547                                 if (info->new_level == 6) {
 548                                         str = map_num(r6layout, info->new_layout);
 549                                         printf("     New Layout : %s\n",
 550                                                str?str:"-unknown-");
 551                                 }
 552                                 if (info->new_level == 10) {
 553                                         printf("     New Layout : near=%d, %s=%d\n",
 554                                                info->new_layout&255,
 555                                                (info->new_layout&0x10000)?"offset":"far",
 556                                                (info->new_layout>>8)&255);
 557                                 }
 558                         }
 559                         if (info->new_chunk != array.chunk_size)
 560                                 printf("  New Chunksize : %dK\n", info->new_chunk/1024);
 561                         printf("\n");
 562                 } else if (e && e->percent >= 0)
 563                         printf("\n");
 564                 if (st && st->sb)
 565                         st->ss->detail_super(st, c->homehost);
 566
 567                 if (array.raid_disks == 0 && sra && sra->array.major_version == -1
 568                     && sra->array.minor_version == -2 && sra->text_version[0] != '/') {
 569                         /* This looks like a container.  Find any active arrays
 570                          * That claim to be a member.
 571                          */
 572                         DIR *dir = opendir("/sys/block");
 573                         struct dirent *de;
 574
 575                         printf("  Member Arrays :");
 576
 577                         while (dir && (de = readdir(dir)) != NULL) {
 578                                 char path[200];
 579                                 char vbuf[1024];
 580                                 int nlen = strlen(sra->sys_name);
 581                                 dev_t devid;
 582                                 if (de->d_name[0] == '.')
 583                                         continue;
 584                                 sprintf(path, "/sys/block/%s/md/metadata_version",
 585                                         de->d_name);
 586                                 if (load_sys(path, vbuf, sizeof(vbuf)) < 0)
 587                                         continue;
 588                                 if (strncmp(vbuf, "external:", 9) != 0 ||
 589                                     !is_subarray(vbuf+9) ||
 590                                     strncmp(vbuf+10, sra->sys_name, nlen) != 0 ||
 591                                     vbuf[10+nlen] != '/')
 592                                         continue;
 593                                 devid = devnm2devid(de->d_name);
 594                                 printf(" %s", map_dev_preferred(
 595                                                major(devid),
 596                                                minor(devid), 1, c->prefer));
 597                         }
 598                         if (dir)
 599                                 closedir(dir);
 600                         printf("\n\n");
 601                 }
 602
 603                 if (array.raid_disks)
 604                         printf("    Number   Major   Minor   RaidDevice State\n");
 605                 else
 606                         printf("    Number   Major   Minor   RaidDevice\n");
 607         }
 608         free(info);
 609
 610         for (d= 0; d < max_disks * 2; d++) {
 611                 char *dv;
 612                 mdu_disk_info_t disk = disks[d];
 613
 614                 if (d >= array.raid_disks*2 &&
 615                     disk.major == 0 &&
 616                     disk.minor == 0)
 617                         continue;
 618                 if ((d & 1) &&
 619                     disk.major == 0 &&
 620                     disk.minor == 0)
 621                         continue;
 622                 if (!c->brief) {
 623                         if (d == array.raid_disks*2) printf("\n");
 624                         if (disk.number < 0 && disk.raid_disk < 0)
 625                                 printf("       -   %5d    %5d        -     ",
 626                                        disk.major, disk.minor);
 627                         else if (disk.raid_disk < 0 || disk.state & (1<<MD_DISK_JOURNAL))
 628                                 printf("   %5d   %5d    %5d        -     ",
 629                                        disk.number, disk.major, disk.minor);
 630                         else if (disk.number < 0)
 631                                 printf("       -   %5d    %5d    %5d     ",
 632                                        disk.major, disk.minor, disk.raid_disk);
 633                         else
 634                                 printf("   %5d   %5d    %5d    %5d     ",
 635                                        disk.number, disk.major, disk.minor, disk.raid_disk);
 636                 }
 637                 if (!c->brief && array.raid_disks) {
 638
 639                         if (disk.state & (1<<MD_DISK_FAULTY)) {
 640                                 printf(" faulty");
 641                                 if (disk.raid_disk < array.raid_disks &&
 642                                     disk.raid_disk >= 0)
 643                                         failed++;
 644                         }
 645                         if (disk.state & (1<<MD_DISK_ACTIVE)) printf(" active");
 646                         if (disk.state & (1<<MD_DISK_SYNC)) {
 647                                 printf(" sync");
 648                                 if (array.level == 10 && (array.layout & ~0x1FFFF) == 0) {
 649                                         int nc = array.layout & 0xff;
 650                                         int fc = (array.layout >> 8) & 0xff;
 651                                         int copies = nc*fc;
 652                                         if (fc == 1 && array.raid_disks % copies == 0 && copies <= 26) {
 653                                                 /* We can divide the devices into 'sets' */
 654                                                 int set = disk.raid_disk % copies;
 655                                                 printf(" set-%c", set + 'A');
 656                                         }
 657                                 }
 658                         }
 659                         if (disk.state & (1<<MD_DISK_REMOVED)) printf(" removed");
 660                         if (disk.state & (1<<MD_DISK_WRITEMOSTLY)) printf(" writemostly");
 661                         if (disk.state & (1<<MD_DISK_FAILFAST)) printf(" failfast");
 662                         if (disk.state & (1<<MD_DISK_JOURNAL)) printf(" journal");
 663                         if ((disk.state &
 664                              ((1<<MD_DISK_ACTIVE)|(1<<MD_DISK_SYNC)
 665                               |(1<<MD_DISK_REMOVED)|(1<<MD_DISK_FAULTY)|(1<<MD_DISK_JOURNAL)))
 666                             == 0) {
 667                                 printf(" spare");
 668                                 if (is_26) {
 669                                         if (disk.raid_disk < array.raid_disks && disk.raid_disk >= 0)
 670                                                 printf(" rebuilding");
 671                                 } else if (is_rebuilding && failed) {
 672                                         /* Taking a bit of a risk here, we remove the
 673                                          * device from the array, and then put it back.
 674                                          * If this fails, we are rebuilding
 675                                          */
 676                                         int err = ioctl(fd, HOT_REMOVE_DISK, makedev(disk.major, disk.minor));
 677                                         if (err == 0) ioctl(fd, HOT_ADD_DISK, makedev(disk.major, disk.minor));
 678                                         if (err && errno ==  EBUSY)
 679                                                 printf(" rebuilding");
 680                                 }
 681                         }
 682                 }
 683                 if (disk.state == 0) spares++;
 684                 dv=map_dev_preferred(disk.major, disk.minor, 0, c->prefer);
 685                 if (dv != NULL) {
 686                         if (c->brief)
 687                                 n_devices = add_device(dv, &devices,
 688                                                        &max_devices,
 689                                                        n_devices);
 690                         else
 691                                 printf("   %s", dv);
 692                 }
 693                 if (!c->brief) printf("\n");
 694         }
 695         if (spares && c->brief && array.raid_disks) printf(" spares=%d", spares);
 696         if (c->brief && st && st->sb)
 697                 st->ss->brief_detail_super(st);
 698         if (st)
 699                 st->ss->free_super(st);
 700
 701         if (c->brief && c->verbose > 0 && devices) {
 702                 qsort(devices, n_devices, sizeof(*devices), cmpstringp);
 703                 printf("\n   devices=%s", devices[0]);
 704                 for (d = 1; d < n_devices; d++)
 705                         printf(",%s", devices[d]);
 706         }
 707         if (c->brief)
 708                 printf("\n");
 709         if (c->test &&
 710             !enough(array.level, array.raid_disks, array.layout,
 711                     1, avail))
 712                 rv = 2;
 713
 714         free(disks);
 715 out:
 716         close(fd);
 717         free(subarray);
 718         free(avail);
 719         for (d = 0; d < n_devices; d++)
 720                 free(devices[d]);
 721         free(devices);
 722         sysfs_free(sra);
 723         return rv;
 724 }
 725
 726 int Detail_Platform(struct superswitch *ss, int scan, int verbose, int export, char *controller_path)
 727 {
 728         /* display platform capabilities for the given metadata format
 729          * 'scan' in this context means iterate over all metadata types
 730          */
 731         int i;
 732         int err = 1;
 733
 734         if (ss && export && ss->export_detail_platform)
 735                 err = ss->export_detail_platform(verbose, controller_path);
 736         else if (ss && ss->detail_platform)
 737                 err = ss->detail_platform(verbose, 0, controller_path);
 738         else if (ss) {
 739                 if (verbose > 0)
 740                         pr_err("%s metadata is platform independent\n",
 741                                 ss->name ? : "[no name]");
 742         } else if (!scan) {
 743                 if (verbose > 0)
 744                         pr_err("specify a metadata type or --scan\n");
 745         }
 746
 747         if (!scan)
 748                 return err;
 749
 750         err = 0;
 751         for (i = 0; superlist[i]; i++) {
 752                 struct superswitch *meta = superlist[i];
 753
 754                 if (meta == ss)
 755                         continue;
 756                 if (verbose > 0)
 757                         pr_err("checking metadata %s\n",
 758                                 meta->name ? : "[no name]");
 759                 if (!meta->detail_platform) {
 760                         if (verbose > 0)
 761                                 pr_err("%s metadata is platform independent\n",
 762                                         meta->name ? : "[no name]");
 763                 } else if (export && meta->export_detail_platform) {
 764                         err |= meta->export_detail_platform(verbose, controller_path);
 765                 } else
 766                         err |= meta->detail_platform(verbose, 0, controller_path);
 767         }
 768
 769         return err;
 770 }