Detail.c

   1 /*
   2  * mdadm - manage Linux "md" devices aka RAID arrays.
   3  *
   4  * Copyright (C) 2001-2006 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@cse.unsw.edu.au>
  23  *    Paper: Neil Brown
  24  *           School of Computer Science and Engineering
  25  *           The University of New South Wales
  26  *           Sydney, 2052
  27  *           Australia
  28  */
  29
  30 #include        "mdadm.h"
  31 #include        "md_p.h"
  32 #include        "md_u.h"
  33 #include        <dirent.h>
  34
  35 int Detail(char *dev, int brief, int export, int test, char *homehost)
  36 {
  37         /*
  38          * Print out details for an md array by using
  39          * GET_ARRAY_INFO and GET_DISK_INFO ioctl calls
  40          */
  41
  42         int fd = open(dev, O_RDONLY);
  43         int vers;
  44         mdu_array_info_t array;
  45         mdu_disk_info_t *disks;
  46         int next;
  47         int d;
  48         time_t atime;
  49         char *c;
  50         char *devices = NULL;
  51         int spares = 0;
  52         struct stat stb;
  53         int is_26 = get_linux_version() >= 2006000;
  54         int is_rebuilding = 0;
  55         int failed = 0;
  56         struct supertype *st = NULL;
  57         int max_disks = MD_SB_DISKS; /* just a default */
  58         struct mdinfo info;
  59         struct mdinfo *sra;
  60         char *member = NULL;
  61         char *container = NULL;
  62
  63         int rv = test ? 4 : 1;
  64         int avail_disks = 0;
  65         char *avail;
  66
  67         if (fd < 0) {
  68                 fprintf(stderr, Name ": cannot open %s: %s\n",
  69                         dev, strerror(errno));
  70                 return rv;
  71         }
  72         vers = md_get_version(fd);
  73         if (vers < 0) {
  74                 fprintf(stderr, Name ": %s does not appear to be an md device\n",
  75                         dev);
  76                 close(fd);
  77                 return rv;
  78         }
  79         if (vers < 9000) {
  80                 fprintf(stderr, Name ": cannot get detail for md device %s: driver version too old.\n",
  81                         dev);
  82                 close(fd);
  83                 return rv;
  84         }
  85         if (ioctl(fd, GET_ARRAY_INFO, &array)<0) {
  86                 if (errno == ENODEV)
  87                         fprintf(stderr, Name ": md device %s does not appear to be active.\n",
  88                                 dev);
  89                 else
  90                         fprintf(stderr, Name ": cannot get array detail for %s: %s\n",
  91                                 dev, strerror(errno));
  92                 close(fd);
  93                 return rv;
  94         }
  95         sra = sysfs_read(fd, 0, GET_VERSION);
  96         st = super_by_fd(fd);
  97
  98         if (fstat(fd, &stb) != 0 && !S_ISBLK(stb.st_mode))
  99                 stb.st_rdev = 0;
 100         rv = 0;
 101
 102         if (st)
 103                 max_disks = st->max_devs;
 104
 105         if (sra && is_subarray(sra->text_version) &&
 106                 strchr(sra->text_version+1, '/')) {
 107                 /* This is a subarray of some container.
 108                  * We want the name of the container, and the member
 109                  */
 110                 char *s = strchr(sra->text_version+1, '/');
 111                 int dn;
 112                 *s++ = '\0';
 113                 member = s;
 114                 dn = devname2devnum(sra->text_version+1);
 115                 container = map_dev(dev2major(dn), dev2minor(dn), 1);
 116         }
 117
 118         /* try to load a superblock */
 119         for (d= 0; d<max_disks; d++) {
 120                 mdu_disk_info_t disk;
 121                 char *dv;
 122                 disk.number = d;
 123                 if (ioctl(fd, GET_DISK_INFO, &disk) < 0)
 124                         continue;
 125                 if (d >= array.raid_disks &&
 126                     disk.major == 0 &&
 127                     disk.minor == 0)
 128                         continue;
 129                 if ((dv=map_dev(disk.major, disk.minor, 1))) {
 130                         if ((!st || !st->sb) &&
 131                             (array.raid_disks == 0 ||
 132                              (disk.state & (1<<MD_DISK_ACTIVE)))) {
 133                                 /* try to read the superblock from this device
 134                                  * to get more info
 135                                  */
 136                                 int fd2 = dev_open(dv, O_RDONLY);
 137                                 if (fd2 >=0 && st &&
 138                                     st->ss->load_super(st, fd2, NULL) == 0) {
 139                                         st->ss->getinfo_super(st, &info);
 140                                         if (array.raid_disks != 0 && /* container */
 141                                             (info.array.ctime != array.ctime ||
 142                                              info.array.level != array.level))
 143                                                 st->ss->free_super(st);
 144                                 }
 145                                 if (fd2 >= 0) close(fd2);
 146                         }
 147                 }
 148         }
 149
 150         /* Ok, we have some info to print... */
 151         c = map_num(pers, array.level);
 152
 153         if (export) {
 154                 if (array.raid_disks) {
 155                         if (c)
 156                                 printf("MD_LEVEL=%s\n", c);
 157                         printf("MD_DEVICES=%d\n", array.raid_disks);
 158                 } else {
 159                         printf("MD_LEVEL=container\n");
 160                         printf("MD_DEVICES=%d\n", array.nr_disks);
 161                 }
 162                 if (container) {
 163                         printf("MD_CONTAINER=%s\n", container);
 164                         printf("MD_MEMBER=%s\n", member);
 165                 } else {
 166                         if (sra && sra->array.major_version < 0)
 167                                 printf("MD_METADATA=%s\n", sra->text_version);
 168                         else
 169                                 printf("MD_METADATA=%02d.%02d\n",
 170                                        array.major_version, array.minor_version);
 171                 }
 172
 173                 if (st && st->sb)
 174                         st->ss->export_detail_super(st);
 175                 goto out;
 176         }
 177
 178         if (brief) {
 179                 mdu_bitmap_file_t bmf;
 180                 if (array.raid_disks)
 181                         printf("ARRAY %s level=%s num-devices=%d", dev,
 182                                c?c:"-unknown-",
 183                                array.raid_disks );
 184                 else
 185                         printf("ARRAY %s level=container num-devices=%d",
 186                                dev, array.nr_disks);
 187
 188                 if (container) {
 189                         printf(" container=%s", container);
 190                         printf(" member=%s", member);
 191                 } else {
 192                         if (sra && sra->array.major_version < 0)
 193                                 printf(" metadata=%s", sra->text_version);
 194                         else
 195                                 printf(" metadata=%02d.%02d",
 196                                        array.major_version, array.minor_version);
 197                 }
 198
 199                 /* Only try GET_BITMAP_FILE for 0.90.01 and later */
 200                 if (vers >= 9001 &&
 201                     ioctl(fd, GET_BITMAP_FILE, &bmf) == 0 &&
 202                     bmf.pathname[0]) {
 203                         printf(" bitmap=%s", bmf.pathname);
 204                 }
 205         } else {
 206                 mdu_bitmap_file_t bmf;
 207                 unsigned long long larray_size;
 208                 struct mdstat_ent *ms = mdstat_read(0, 0);
 209                 struct mdstat_ent *e;
 210                 int devnum = array.md_minor;
 211                 if (major(stb.st_rdev) != MD_MAJOR)
 212                         devnum = -1 - devnum;
 213
 214                 for (e=ms; e; e=e->next)
 215                         if (e->devnum == devnum)
 216                                 break;
 217                 if (!get_dev_size(fd, NULL, &larray_size))
 218                         larray_size = 0;
 219
 220                 printf("%s:\n", dev);
 221
 222                 if (container)
 223                         printf("      Container : %s, member %s\n", container, member);
 224                 else {
 225                 if (sra && sra->array.major_version < 0)
 226                         printf("        Version : %s\n", sra->text_version);
 227                 else
 228                         printf("        Version : %02d.%02d\n",
 229                                array.major_version, array.minor_version);
 230                 }
 231
 232                 atime = array.ctime;
 233                 if (atime)
 234                         printf("  Creation Time : %.24s\n", ctime(&atime));
 235                 if (array.raid_disks == 0) c = "container";
 236                 printf("     Raid Level : %s\n", c?c:"-unknown-");
 237                 if (larray_size)
 238                         printf("     Array Size : %llu%s\n", (larray_size>>10), human_size(larray_size));
 239                 if (array.level >= 1) {
 240                         if (array.major_version != 0 &&
 241                             (larray_size >= 0xFFFFFFFFULL|| array.size == 0)) {
 242                                 unsigned long long dsize = get_component_size(fd);
 243                                 if (dsize > 0)
 244                                         printf("  Used Dev Size : %llu%s\n",
 245                                                dsize,
 246                                          human_size((long long)dsize<<10));
 247                                 else
 248                                         printf("  Used Dev Size : unknown\n");
 249                         } else
 250                                 printf("  Used Dev Size : %d%s\n", array.size,
 251                                        human_size((long long)array.size<<10));
 252                 }
 253                 if (array.raid_disks)
 254                         printf("   Raid Devices : %d\n", array.raid_disks);
 255                 printf("  Total Devices : %d\n", array.nr_disks);
 256                 if (!container &&
 257                     ((sra == NULL && array.major_version == 0) ||
 258                      (sra && sra->array.major_version == 0)))
 259                         printf("Preferred Minor : %d\n", array.md_minor);
 260                 if (sra == NULL || sra->array.major_version >= 0)
 261                         printf("    Persistence : Superblock is %spersistent\n",
 262                                array.not_persistent?"not ":"");
 263                 printf("\n");
 264                 /* Only try GET_BITMAP_FILE for 0.90.01 and later */
 265                 if (vers >= 9001 &&
 266                     ioctl(fd, GET_BITMAP_FILE, &bmf) == 0 &&
 267                     bmf.pathname[0]) {
 268                         printf("  Intent Bitmap : %s\n", bmf.pathname);
 269                         printf("\n");
 270                 } else if (array.state & (1<<MD_SB_BITMAP_PRESENT))
 271                         printf("  Intent Bitmap : Internal\n\n");
 272                 atime = array.utime;
 273                 if (atime)
 274                         printf("    Update Time : %.24s\n", ctime(&atime));
 275                 if (array.raid_disks)
 276                         printf("          State : %s%s%s%s\n",
 277                                (array.state&(1<<MD_SB_CLEAN))?"clean":"active",
 278                                array.active_disks < array.raid_disks? ", degraded":"",
 279                                (!e || e->percent < 0) ? "" :
 280                                (e->resync) ? ", resyncing": ", recovering",
 281                                larray_size ? "": ", Not Started");
 282                 if (array.raid_disks)
 283                         printf(" Active Devices : %d\n", array.active_disks);
 284                 printf("Working Devices : %d\n", array.working_disks);
 285                 if (array.raid_disks) {
 286                         printf(" Failed Devices : %d\n", array.failed_disks);
 287                         printf("  Spare Devices : %d\n", array.spare_disks);
 288                 }
 289                 printf("\n");
 290                 if (array.level == 5) {
 291                         c = map_num(r5layout, array.layout);
 292                         printf("         Layout : %s\n", c?c:"-unknown-");
 293                 }
 294                 if (array.level == 10) {
 295                         printf("         Layout : near=%d, %s=%d\n",
 296                                array.layout&255, (array.layout&0x10000)?"offset":"far",
 297                                (array.layout>>8)&255);
 298                 }
 299                 switch (array.level) {
 300                 case 0:
 301                 case 4:
 302                 case 5:
 303                 case 10:
 304                 case 6:
 305                         if (array.chunk_size)
 306                                 printf("     Chunk Size : %dK\n\n",
 307                                        array.chunk_size/1024);
 308                         break;
 309                 case -1:
 310                         printf("       Rounding : %dK\n\n", array.chunk_size/1024);
 311                         break;
 312                 default: break;
 313                 }
 314
 315                 if (e && e->percent >= 0) {
 316                         printf(" Re%s Status : %d%% complete\n",
 317                                (st && st->sb && info.reshape_active)?
 318                                   "shape":"build",
 319                                e->percent);
 320                         is_rebuilding = 1;
 321                 }
 322                 free_mdstat(ms);
 323
 324                 if (st->sb && info.reshape_active) {
 325 #if 0
 326 This is pretty boring
 327                         printf("  Reshape pos'n : %llu%s\n", (unsigned long long) info.reshape_progress<<9,
 328                                human_size(info.reshape_progress<<9));
 329 #endif
 330                         if (info.delta_disks > 0)
 331                                 printf("  Delta Devices : %d, (%d->%d)\n",
 332                                        info.delta_disks, array.raid_disks - info.delta_disks, array.raid_disks);
 333                         if (info.delta_disks < 0)
 334                                 printf("  Delta Devices : %d, (%d->%d)\n",
 335                                        info.delta_disks, array.raid_disks, array.raid_disks + info.delta_disks);
 336                         if (info.new_level != array.level) {
 337                                 char *c = map_num(pers, info.new_level);
 338                                 printf("      New Level : %s\n", c?c:"-unknown-");
 339                         }
 340                         if (info.new_level != array.level ||
 341                             info.new_layout != array.layout) {
 342                                 if (info.new_level == 5) {
 343                                         char *c = map_num(r5layout, info.new_layout);
 344                                         printf("     New Layout : %s\n",
 345                                                c?c:"-unknown-");
 346                                 }
 347                                 if (info.new_level == 10) {
 348                                         printf("     New Layout : near=%d, %s=%d\n",
 349                                                info.new_layout&255,
 350                                                (info.new_layout&0x10000)?"offset":"far",
 351                                                (info.new_layout>>8)&255);
 352                                 }
 353                         }
 354                         if (info.new_chunk != array.chunk_size)
 355                                 printf("  New Chunksize : %dK\n", info.new_chunk/1024);
 356                         printf("\n");
 357                 } else if (e && e->percent >= 0)
 358                         printf("\n");
 359                 if (st && st->sb)
 360                         st->ss->detail_super(st, homehost);
 361
 362                 if (array.raid_disks == 0 && sra && sra->array.major_version == -1
 363                     && sra->array.minor_version == -2 && sra->text_version[0] != '/') {
 364                         /* This looks like a container.  Find any active arrays
 365                          * That claim to be a member.
 366                          */
 367                         DIR *dir = opendir("/sys/block");
 368                         struct dirent *de;
 369
 370                         printf("  Member Arrays :");
 371
 372                         while (dir && (de = readdir(dir)) != NULL) {
 373                                 char path[200];
 374                                 char vbuf[1024];
 375                                 int nlen = strlen(sra->sys_name);
 376                                 int dn;
 377                                 if (de->d_name[0] == '.')
 378                                         continue;
 379                                 sprintf(path, "/sys/block/%s/md/metadata_version",
 380                                         de->d_name);
 381                                 if (load_sys(path, vbuf) < 0)
 382                                         continue;
 383                                 if (strncmp(vbuf, "external:", 9) != 0 ||
 384                                     !is_subarray(sra->sys_name+9) ||
 385                                     strncmp(vbuf+10, sra->sys_name, nlen) != 0 ||
 386                                     vbuf[10+nlen] != '/')
 387                                         continue;
 388                                 dn = devname2devnum(de->d_name);
 389                                 printf(" %s", map_dev(dev2major(dn),
 390                                                       dev2minor(dn), 1));
 391                         }
 392                         if (dir)
 393                                 closedir(dir);
 394                         printf("\n\n");
 395                 }
 396
 397                 if (array.raid_disks)
 398                         printf("    Number   Major   Minor   RaidDevice State\n");
 399                 else
 400                         printf("    Number   Major   Minor   RaidDevice\n");
 401         }
 402         disks = malloc(max_disks * sizeof(mdu_disk_info_t));
 403         for (d=0; d<max_disks; d++) {
 404                 disks[d].state = (1<<MD_DISK_REMOVED);
 405                 disks[d].major = disks[d].minor = 0;
 406                 disks[d].number = disks[d].raid_disk = d;
 407         }
 408
 409         next = array.raid_disks;
 410         for (d=0; d < max_disks; d++) {
 411                 mdu_disk_info_t disk;
 412                 disk.number = d;
 413                 if (ioctl(fd, GET_DISK_INFO, &disk) < 0) {
 414                         if (d < array.raid_disks)
 415                                 fprintf(stderr, Name ": cannot get device detail for device %d: %s\n",
 416                                         d, strerror(errno));
 417                         continue;
 418                 }
 419                 if (disk.major == 0 && disk.minor == 0)
 420                         continue;
 421                 if (disk.raid_disk >= 0 && disk.raid_disk < array.raid_disks)
 422                         disks[disk.raid_disk] = disk;
 423                 else if (next < max_disks)
 424                         disks[next++] = disk;
 425         }
 426
 427         avail = calloc(array.raid_disks, 1);
 428         for (d= 0; d < max_disks; d++) {
 429                 char *dv;
 430                 mdu_disk_info_t disk = disks[d];
 431
 432                 if (d >= array.raid_disks &&
 433                     disk.major == 0 &&
 434                     disk.minor == 0)
 435                         continue;
 436                 if (!brief) {
 437                         if (d == array.raid_disks) printf("\n");
 438                         if (disk.raid_disk < 0)
 439                                 printf("   %5d   %5d    %5d        -     ",
 440                                        disk.number, disk.major, disk.minor);
 441                         else
 442                                 printf("   %5d   %5d    %5d    %5d     ",
 443                                        disk.number, disk.major, disk.minor, disk.raid_disk);
 444                 }
 445                 if (!brief && array.raid_disks) {
 446
 447                         if (disk.state & (1<<MD_DISK_FAULTY)) {
 448                                 printf(" faulty");
 449                                 if (disk.raid_disk < array.raid_disks &&
 450                                     disk.raid_disk >= 0)
 451                                         failed++;
 452                         }
 453                         if (disk.state & (1<<MD_DISK_ACTIVE)) printf(" active");
 454                         if (disk.state & (1<<MD_DISK_SYNC)) printf(" sync");
 455                         if (disk.state & (1<<MD_DISK_REMOVED)) printf(" removed");
 456                         if (disk.state & (1<<MD_DISK_WRITEMOSTLY)) printf(" writemostly");
 457                         if ((disk.state &
 458                              ((1<<MD_DISK_ACTIVE)|(1<<MD_DISK_SYNC)|(1<<MD_DISK_REMOVED)))
 459                             == 0) {
 460                                 printf(" spare");
 461                                 if (is_26) {
 462                                         if (disk.raid_disk < array.raid_disks && disk.raid_disk >= 0)
 463                                                 printf(" rebuilding");
 464                                 } else if (is_rebuilding && failed) {
 465                                         /* Taking a bit of a risk here, we remove the
 466                                          * device from the array, and then put it back.
 467                                          * If this fails, we are rebuilding
 468                                          */
 469                                         int err = ioctl(fd, HOT_REMOVE_DISK, makedev(disk.major, disk.minor));
 470                                         if (err == 0) ioctl(fd, HOT_ADD_DISK, makedev(disk.major, disk.minor));
 471                                         if (err && errno ==  EBUSY)
 472                                                 printf(" rebuilding");
 473                                 }
 474                         }
 475                 }
 476                 if (disk.state == 0) spares++;
 477                 if (test && d < array.raid_disks
 478                     && !(disk.state & (1<<MD_DISK_SYNC)))
 479                         rv |= 1;
 480                 if (d < array.raid_disks
 481                     && (disk.state & (1<<MD_DISK_SYNC))) {
 482                         avail_disks ++;
 483                         avail[d] = 1;
 484                 }
 485                 if ((dv=map_dev(disk.major, disk.minor, 0))) {
 486                         if (brief) {
 487                                 if (devices) {
 488                                         devices = realloc(devices,
 489                                                           strlen(devices)+1+strlen(dv)+1);
 490                                         strcat(strcat(devices,","),dv);
 491                                 } else
 492                                         devices = strdup(dv);
 493                         } else
 494                                 printf("   %s", dv);
 495                 }
 496                 if (!brief) printf("\n");
 497         }
 498         if (spares && brief && array.raid_disks) printf(" spares=%d", spares);
 499         if (brief && st && st->sb)
 500                 st->ss->brief_detail_super(st);
 501         st->ss->free_super(st);
 502
 503         if (brief > 1 && devices) printf("\n   devices=%s", devices);
 504         if (brief) printf("\n");
 505         if (test &&
 506             !enough(array.level, array.raid_disks, array.layout,
 507                     1, avail, avail_disks))
 508                 rv = 2;
 509
 510 out:
 511         close(fd);
 512         return rv;
 513 }