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