Detail.c

   1 /*
   2  * mdadm - manage Linux "md" devices aka RAID arrays.
   3  *
   4  * Copyright (C) 2001-2009 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, int brief, int export, int test, char *homehost)
  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 *c;
  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 = NULL;
  52         int max_disks = MD_SB_DISKS; /* just a default */
  53         struct mdinfo info;
  54         struct mdinfo *sra;
  55         char *member = NULL;
  56         char *container = NULL;
  57
  58         int rv = test ? 4 : 1;
  59         int avail_disks = 0;
  60         char *avail;
  61
  62         if (fd < 0) {
  63                 fprintf(stderr, Name ": cannot open %s: %s\n",
  64                         dev, strerror(errno));
  65                 return rv;
  66         }
  67         vers = md_get_version(fd);
  68         if (vers < 0) {
  69                 fprintf(stderr, Name ": %s does not appear to be an md device\n",
  70                         dev);
  71                 close(fd);
  72                 return rv;
  73         }
  74         if (vers < 9000) {
  75                 fprintf(stderr, Name ": cannot get detail for md device %s: driver version too old.\n",
  76                         dev);
  77                 close(fd);
  78                 return rv;
  79         }
  80         if (ioctl(fd, GET_ARRAY_INFO, &array)<0) {
  81                 if (errno == ENODEV)
  82                         fprintf(stderr, Name ": md device %s does not appear to be active.\n",
  83                                 dev);
  84                 else
  85                         fprintf(stderr, Name ": cannot get array detail for %s: %s\n",
  86                                 dev, strerror(errno));
  87                 close(fd);
  88                 return rv;
  89         }
  90         sra = sysfs_read(fd, 0, GET_VERSION);
  91         st = super_by_fd(fd);
  92
  93         if (fstat(fd, &stb) != 0 && !S_ISBLK(stb.st_mode))
  94                 stb.st_rdev = 0;
  95         rv = 0;
  96
  97         if (st)
  98                 max_disks = st->max_devs;
  99
 100         if (sra && is_subarray(sra->text_version) &&
 101                 strchr(sra->text_version+1, '/')) {
 102                 /* This is a subarray of some container.
 103                  * We want the name of the container, and the member
 104                  */
 105                 char *s = strchr(sra->text_version+1, '/');
 106                 int dn;
 107                 *s++ = '\0';
 108                 member = s;
 109                 dn = devname2devnum(sra->text_version+1);
 110                 container = map_dev(dev2major(dn), dev2minor(dn), 1);
 111         }
 112
 113         /* try to load a superblock */
 114         for (d= 0; d<max_disks; d++) {
 115                 mdu_disk_info_t disk;
 116                 char *dv;
 117                 disk.number = d;
 118                 if (ioctl(fd, GET_DISK_INFO, &disk) < 0)
 119                         continue;
 120                 if (d >= array.raid_disks &&
 121                     disk.major == 0 &&
 122                     disk.minor == 0)
 123                         continue;
 124                 if ((dv=map_dev(disk.major, disk.minor, 1))) {
 125                         if ((!st || !st->sb) &&
 126                             (array.raid_disks == 0 ||
 127                              (disk.state & (1<<MD_DISK_ACTIVE)))) {
 128                                 /* try to read the superblock from this device
 129                                  * to get more info
 130                                  */
 131                                 int fd2 = dev_open(dv, O_RDONLY);
 132                                 if (fd2 >=0 && st &&
 133                                     st->ss->load_super(st, fd2, NULL) == 0) {
 134                                         st->ss->getinfo_super(st, &info);
 135                                         if (array.raid_disks != 0 && /* container */
 136                                             (info.array.ctime != array.ctime ||
 137                                              info.array.level != array.level))
 138                                                 st->ss->free_super(st);
 139                                 }
 140                                 if (fd2 >= 0) close(fd2);
 141                         }
 142                 }
 143         }
 144
 145         /* Ok, we have some info to print... */
 146         c = map_num(pers, array.level);
 147
 148         if (export) {
 149                 if (array.raid_disks) {
 150                         if (c)
 151                                 printf("MD_LEVEL=%s\n", c);
 152                         printf("MD_DEVICES=%d\n", array.raid_disks);
 153                 } else {
 154                         printf("MD_LEVEL=container\n");
 155                         printf("MD_DEVICES=%d\n", array.nr_disks);
 156                 }
 157                 if (container) {
 158                         printf("MD_CONTAINER=%s\n", container);
 159                         printf("MD_MEMBER=%s\n", member);
 160                 } else {
 161                         if (sra && sra->array.major_version < 0)
 162                                 printf("MD_METADATA=%s\n", sra->text_version);
 163                         else
 164                                 printf("MD_METADATA=%d.%02d\n",
 165                                        array.major_version, array.minor_version);
 166                 }
 167
 168                 if (st && st->sb) {
 169                         struct mdinfo info;
 170                         char nbuf[64];
 171                         struct map_ent *mp, *map = NULL;
 172                         st->ss->getinfo_super(st, &info);
 173                         fname_from_uuid(st, &info, nbuf, ':');
 174                         printf("MD_UUID=%s\n", nbuf+5);
 175                         mp = map_by_uuid(&map, info.uuid);
 176                         if (mp && mp->path &&
 177                             strncmp(mp->path, "/dev/md/", 8) == 0)
 178                                 printf("MD_DEVNAME=%s\n", mp->path+8);
 179
 180                         if (st->ss->export_detail_super)
 181                                 st->ss->export_detail_super(st);
 182                 } else {
 183                         struct map_ent *mp, *map = NULL;
 184                         mp = map_by_devnum(&map, fd2devnum(fd));
 185                         if (mp && mp->path &&
 186                             strncmp(mp->path, "/dev/md/", 8) == 0)
 187                                 printf("MD_DEVNAME=%s\n", mp->path+8);
 188                 }
 189                 goto out;
 190         }
 191
 192         if (brief) {
 193                 mdu_bitmap_file_t bmf;
 194                 printf("ARRAY %s", dev);
 195                 if (brief > 1) {
 196                         if (array.raid_disks)
 197                                 printf("level=%s num-devices=%d",
 198                                        c?c:"-unknown-",
 199                                        array.raid_disks );
 200                         else
 201                                 printf("level=container num-devices=%d",
 202                                        array.nr_disks);
 203                 }
 204                 if (container) {
 205                         printf(" container=%s", container);
 206                         printf(" member=%s", member);
 207                 } else {
 208                         if (sra && sra->array.major_version < 0)
 209                                 printf(" metadata=%s", sra->text_version);
 210                         else
 211                                 printf(" metadata=%d.%02d",
 212                                        array.major_version, array.minor_version);
 213                 }
 214
 215                 /* Only try GET_BITMAP_FILE for 0.90.01 and later */
 216                 if (vers >= 9001 &&
 217                     ioctl(fd, GET_BITMAP_FILE, &bmf) == 0 &&
 218                     bmf.pathname[0]) {
 219                         printf(" bitmap=%s", bmf.pathname);
 220                 }
 221         } else {
 222                 mdu_bitmap_file_t bmf;
 223                 unsigned long long larray_size;
 224                 struct mdstat_ent *ms = mdstat_read(0, 0);
 225                 struct mdstat_ent *e;
 226                 int devnum = array.md_minor;
 227                 if (major(stb.st_rdev) == get_mdp_major())
 228                         devnum = -1 - devnum;
 229
 230                 for (e=ms; e; e=e->next)
 231                         if (e->devnum == devnum)
 232                                 break;
 233                 if (!get_dev_size(fd, NULL, &larray_size))
 234                         larray_size = 0;
 235
 236                 printf("%s:\n", dev);
 237
 238                 if (container)
 239                         printf("      Container : %s, member %s\n", container, member);
 240                 else {
 241                 if (sra && sra->array.major_version < 0)
 242                         printf("        Version : %s\n", sra->text_version);
 243                 else
 244                         printf("        Version : %d.%02d\n",
 245                                array.major_version, array.minor_version);
 246                 }
 247
 248                 atime = array.ctime;
 249                 if (atime)
 250                         printf("  Creation Time : %.24s\n", ctime(&atime));
 251                 if (array.raid_disks == 0) c = "container";
 252                 printf("     Raid Level : %s\n", c?c:"-unknown-");
 253                 if (larray_size)
 254                         printf("     Array Size : %llu%s\n", (larray_size>>10), human_size(larray_size));
 255                 if (array.level >= 1) {
 256                         if (array.major_version != 0 &&
 257                             (larray_size >= 0xFFFFFFFFULL|| array.size == 0)) {
 258                                 unsigned long long dsize = get_component_size(fd);
 259                                 if (dsize > 0)
 260                                         printf("  Used Dev Size : %llu%s\n",
 261                                                dsize/2,
 262                                          human_size((long long)dsize<<9));
 263                                 else
 264                                         printf("  Used Dev Size : unknown\n");
 265                         } else
 266                                 printf("  Used Dev Size : %d%s\n", array.size,
 267                                        human_size((long long)array.size<<10));
 268                 }
 269                 if (array.raid_disks)
 270                         printf("   Raid Devices : %d\n", array.raid_disks);
 271                 printf("  Total Devices : %d\n", array.nr_disks);
 272                 if (!container &&
 273                     ((sra == NULL && array.major_version == 0) ||
 274                      (sra && sra->array.major_version == 0)))
 275                         printf("Preferred Minor : %d\n", array.md_minor);
 276                 if (sra == NULL || sra->array.major_version >= 0)
 277                         printf("    Persistence : Superblock is %spersistent\n",
 278                                array.not_persistent?"not ":"");
 279                 printf("\n");
 280                 /* Only try GET_BITMAP_FILE for 0.90.01 and later */
 281                 if (vers >= 9001 &&
 282                     ioctl(fd, GET_BITMAP_FILE, &bmf) == 0 &&
 283                     bmf.pathname[0]) {
 284                         printf("  Intent Bitmap : %s\n", bmf.pathname);
 285                         printf("\n");
 286                 } else if (array.state & (1<<MD_SB_BITMAP_PRESENT))
 287                         printf("  Intent Bitmap : Internal\n\n");
 288                 atime = array.utime;
 289                 if (atime)
 290                         printf("    Update Time : %.24s\n", ctime(&atime));
 291                 if (array.raid_disks)
 292                         printf("          State : %s%s%s%s\n",
 293                                (array.state&(1<<MD_SB_CLEAN))?"clean":"active",
 294                                array.active_disks < array.raid_disks? ", degraded":"",
 295                                (!e || e->percent < 0) ? "" :
 296                                (e->resync) ? ", resyncing": ", recovering",
 297                                larray_size ? "": ", Not Started");
 298                 if (array.raid_disks)
 299                         printf(" Active Devices : %d\n", array.active_disks);
 300                 printf("Working Devices : %d\n", array.working_disks);
 301                 if (array.raid_disks) {
 302                         printf(" Failed Devices : %d\n", array.failed_disks);
 303                         printf("  Spare Devices : %d\n", array.spare_disks);
 304                 }
 305                 printf("\n");
 306                 if (array.level == 5) {
 307                         c = map_num(r5layout, array.layout);
 308                         printf("         Layout : %s\n", c?c:"-unknown-");
 309                 }
 310                 if (array.level == 10) {
 311                         printf("         Layout :");
 312                         print_r10_layout(array.layout);
 313                         printf("\n");
 314                 }
 315                 switch (array.level) {
 316                 case 0:
 317                 case 4:
 318                 case 5:
 319                 case 10:
 320                 case 6:
 321                         if (array.chunk_size)
 322                                 printf("     Chunk Size : %dK\n\n",
 323                                        array.chunk_size/1024);
 324                         break;
 325                 case -1:
 326                         printf("       Rounding : %dK\n\n", array.chunk_size/1024);
 327                         break;
 328                 default: break;
 329                 }
 330
 331                 if (e && e->percent >= 0) {
 332                         printf(" Re%s Status : %d%% complete\n",
 333                                (st && st->sb && info.reshape_active)?
 334                                   "shape":"build",
 335                                e->percent);
 336                         is_rebuilding = 1;
 337                 }
 338                 free_mdstat(ms);
 339
 340                 if (st->sb && info.reshape_active) {
 341 #if 0
 342 This is pretty boring
 343                         printf("  Reshape pos'n : %llu%s\n", (unsigned long long) info.reshape_progress<<9,
 344                                human_size(info.reshape_progress<<9));
 345 #endif
 346                         if (info.delta_disks > 0)
 347                                 printf("  Delta Devices : %d, (%d->%d)\n",
 348                                        info.delta_disks, array.raid_disks - info.delta_disks, array.raid_disks);
 349                         if (info.delta_disks < 0)
 350                                 printf("  Delta Devices : %d, (%d->%d)\n",
 351                                        info.delta_disks, array.raid_disks, array.raid_disks + info.delta_disks);
 352                         if (info.new_level != array.level) {
 353                                 char *c = map_num(pers, info.new_level);
 354                                 printf("      New Level : %s\n", c?c:"-unknown-");
 355                         }
 356                         if (info.new_level != array.level ||
 357                             info.new_layout != array.layout) {
 358                                 if (info.new_level == 5) {
 359                                         char *c = map_num(r5layout, info.new_layout);
 360                                         printf("     New Layout : %s\n",
 361                                                c?c:"-unknown-");
 362                                 }
 363                                 if (info.new_level == 10) {
 364                                         printf("     New Layout : near=%d, %s=%d\n",
 365                                                info.new_layout&255,
 366                                                (info.new_layout&0x10000)?"offset":"far",
 367                                                (info.new_layout>>8)&255);
 368                                 }
 369                         }
 370                         if (info.new_chunk != array.chunk_size)
 371                                 printf("  New Chunksize : %dK\n", info.new_chunk/1024);
 372                         printf("\n");
 373                 } else if (e && e->percent >= 0)
 374                         printf("\n");
 375                 if (st && st->sb)
 376                         st->ss->detail_super(st, homehost);
 377
 378                 if (array.raid_disks == 0 && sra && sra->array.major_version == -1
 379                     && sra->array.minor_version == -2 && sra->text_version[0] != '/') {
 380                         /* This looks like a container.  Find any active arrays
 381                          * That claim to be a member.
 382                          */
 383                         DIR *dir = opendir("/sys/block");
 384                         struct dirent *de;
 385
 386                         printf("  Member Arrays :");
 387
 388                         while (dir && (de = readdir(dir)) != NULL) {
 389                                 char path[200];
 390                                 char vbuf[1024];
 391                                 int nlen = strlen(sra->sys_name);
 392                                 int dn;
 393                                 if (de->d_name[0] == '.')
 394                                         continue;
 395                                 sprintf(path, "/sys/block/%s/md/metadata_version",
 396                                         de->d_name);
 397                                 if (load_sys(path, vbuf) < 0)
 398                                         continue;
 399                                 if (strncmp(vbuf, "external:", 9) != 0 ||
 400                                     !is_subarray(sra->sys_name+9) ||
 401                                     strncmp(vbuf+10, sra->sys_name, nlen) != 0 ||
 402                                     vbuf[10+nlen] != '/')
 403                                         continue;
 404                                 dn = devname2devnum(de->d_name);
 405                                 printf(" %s", map_dev(dev2major(dn),
 406                                                       dev2minor(dn), 1));
 407                         }
 408                         if (dir)
 409                                 closedir(dir);
 410                         printf("\n\n");
 411                 }
 412
 413                 if (array.raid_disks)
 414                         printf("    Number   Major   Minor   RaidDevice State\n");
 415                 else
 416                         printf("    Number   Major   Minor   RaidDevice\n");
 417         }
 418         disks = malloc(max_disks * sizeof(mdu_disk_info_t));
 419         for (d=0; d<max_disks; d++) {
 420                 disks[d].state = (1<<MD_DISK_REMOVED);
 421                 disks[d].major = disks[d].minor = 0;
 422                 disks[d].number = disks[d].raid_disk = d;
 423         }
 424
 425         next = array.raid_disks;
 426         for (d=0; d < max_disks; d++) {
 427                 mdu_disk_info_t disk;
 428                 disk.number = d;
 429                 if (ioctl(fd, GET_DISK_INFO, &disk) < 0) {
 430                         if (d < array.raid_disks)
 431                                 fprintf(stderr, Name ": cannot get device detail for device %d: %s\n",
 432                                         d, strerror(errno));
 433                         continue;
 434                 }
 435                 if (disk.major == 0 && disk.minor == 0)
 436                         continue;
 437                 if (disk.raid_disk >= 0 && disk.raid_disk < array.raid_disks)
 438                         disks[disk.raid_disk] = disk;
 439                 else if (next < max_disks)
 440                         disks[next++] = disk;
 441         }
 442
 443         avail = calloc(array.raid_disks, 1);
 444         for (d= 0; d < max_disks; d++) {
 445                 char *dv;
 446                 mdu_disk_info_t disk = disks[d];
 447
 448                 if (d >= array.raid_disks &&
 449                     disk.major == 0 &&
 450                     disk.minor == 0)
 451                         continue;
 452                 if (!brief) {
 453                         if (d == array.raid_disks) printf("\n");
 454                         if (disk.raid_disk < 0)
 455                                 printf("   %5d   %5d    %5d        -     ",
 456                                        disk.number, disk.major, disk.minor);
 457                         else
 458                                 printf("   %5d   %5d    %5d    %5d     ",
 459                                        disk.number, disk.major, disk.minor, disk.raid_disk);
 460                 }
 461                 if (!brief && array.raid_disks) {
 462
 463                         if (disk.state & (1<<MD_DISK_FAULTY)) {
 464                                 printf(" faulty");
 465                                 if (disk.raid_disk < array.raid_disks &&
 466                                     disk.raid_disk >= 0)
 467                                         failed++;
 468                         }
 469                         if (disk.state & (1<<MD_DISK_ACTIVE)) printf(" active");
 470                         if (disk.state & (1<<MD_DISK_SYNC)) printf(" sync");
 471                         if (disk.state & (1<<MD_DISK_REMOVED)) printf(" removed");
 472                         if (disk.state & (1<<MD_DISK_WRITEMOSTLY)) printf(" writemostly");
 473                         if ((disk.state &
 474                              ((1<<MD_DISK_ACTIVE)|(1<<MD_DISK_SYNC)|(1<<MD_DISK_REMOVED)))
 475                             == 0) {
 476                                 printf(" spare");
 477                                 if (is_26) {
 478                                         if (disk.raid_disk < array.raid_disks && disk.raid_disk >= 0)
 479                                                 printf(" rebuilding");
 480                                 } else if (is_rebuilding && failed) {
 481                                         /* Taking a bit of a risk here, we remove the
 482                                          * device from the array, and then put it back.
 483                                          * If this fails, we are rebuilding
 484                                          */
 485                                         int err = ioctl(fd, HOT_REMOVE_DISK, makedev(disk.major, disk.minor));
 486                                         if (err == 0) ioctl(fd, HOT_ADD_DISK, makedev(disk.major, disk.minor));
 487                                         if (err && errno ==  EBUSY)
 488                                                 printf(" rebuilding");
 489                                 }
 490                         }
 491                 }
 492                 if (disk.state == 0) spares++;
 493                 if (test && d < array.raid_disks
 494                     && !(disk.state & (1<<MD_DISK_SYNC)))
 495                         rv |= 1;
 496                 if (d < array.raid_disks
 497                     && (disk.state & (1<<MD_DISK_SYNC))) {
 498                         avail_disks ++;
 499                         avail[d] = 1;
 500                 }
 501                 if ((dv=map_dev(disk.major, disk.minor, 0))) {
 502                         if (brief) {
 503                                 if (devices) {
 504                                         devices = realloc(devices,
 505                                                           strlen(devices)+1+strlen(dv)+1);
 506                                         strcat(strcat(devices,","),dv);
 507                                 } else
 508                                         devices = strdup(dv);
 509                         } else
 510                                 printf("   %s", dv);
 511                 }
 512                 if (!brief) printf("\n");
 513         }
 514         if (spares && brief && array.raid_disks) printf(" spares=%d", spares);
 515         if (brief && st && st->sb)
 516                 st->ss->brief_detail_super(st);
 517         st->ss->free_super(st);
 518
 519         if (brief > 1 && devices) printf("\n   devices=%s", devices);
 520         if (brief) printf("\n");
 521         if (test &&
 522             !enough(array.level, array.raid_disks, array.layout,
 523                     1, avail, avail_disks))
 524                 rv = 2;
 525
 526 out:
 527         close(fd);
 528         return rv;
 529 }
 530
 531 int Detail_Platform(struct superswitch *ss, int scan, int verbose)
 532 {
 533         /* display platform capabilities for the given metadata format
 534          * 'scan' in this context means iterate over all metadata types
 535          */
 536         int i;
 537         int err = 1;
 538
 539         if (ss && ss->detail_platform)
 540                 err = ss->detail_platform(verbose, 0);
 541         else if (ss) {
 542                 if (verbose)
 543                         fprintf(stderr, Name ": %s metadata is platform independent\n",
 544                                 ss->name ? : "[no name]");
 545         } else if (!scan) {
 546                 if (verbose)
 547                         fprintf(stderr, Name ": specify a metadata type or --scan\n");
 548         }
 549
 550         if (!scan)
 551                 return err;
 552
 553         for (i = 0; superlist[i]; i++) {
 554                 struct superswitch *meta = superlist[i];
 555
 556                 if (meta == ss)
 557                         continue;
 558                 if (verbose)
 559                         fprintf(stderr, Name ": checking metadata %s\n",
 560                                 meta->name ? : "[no name]");
 561                 if (!meta->detail_platform) {
 562                         if (verbose)
 563                                 fprintf(stderr, Name ": %s metadata is platform independent\n",
 564                                         meta->name ? : "[no name]");
 565                 } else
 566                         err |= meta->detail_platform(verbose, 0);
 567         }
 568
 569         return err;
 570 }