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                             (disk.state & (1<<MD_DISK_ACTIVE))) {
 132                                 /* try to read the superblock from this device
 133                                  * to get more info
 134                                  */
 135                                 int fd2 = dev_open(dv, O_RDONLY);
 136                                 if (fd2 >=0 && st &&
 137                                     st->ss->load_super(st, fd2, NULL) == 0) {
 138                                         st->ss->getinfo_super(st, &info);
 139                                         if (info.array.ctime != array.ctime ||
 140                                             info.array.level != array.level)
 141                                                 st->ss->free_super(st);
 142                                 }
 143                                 if (fd2 >= 0) close(fd2);
 144                         }
 145                 }
 146         }
 147
 148         /* Ok, we have some info to print... */
 149         c = map_num(pers, array.level);
 150
 151         if (export) {
 152                 if (array.raid_disks) {
 153                         if (c)
 154                                 printf("MD_LEVEL=%s\n", c);
 155                         printf("MD_DEVICES=%d\n", array.raid_disks);
 156                 } else {
 157                         printf("MD_LEVEL=container\n");
 158                         printf("MD_DEVICES=%d\n", array.nr_disks);
 159                 }
 160                 if (container) {
 161                         printf("MD_CONTAINER=%s\n", container);
 162                         printf("MD_MEMBER=%s\n", member);
 163                 } else {
 164                         if (sra && sra->array.major_version < 0)
 165                                 printf("MD_METADATA=%s\n", sra->text_version);
 166                         else
 167                                 printf("MD_METADATA=%02d.%02d\n",
 168                                        array.major_version, array.minor_version);
 169                 }
 170
 171                 if (st && st->sb)
 172                         st->ss->export_detail_super(st);
 173                 goto out;
 174         }
 175
 176         if (brief) {
 177                 mdu_bitmap_file_t bmf;
 178                 if (array.raid_disks)
 179                         printf("ARRAY %s level=%s num-devices=%d", dev,
 180                                c?c:"-unknown-",
 181                                array.raid_disks );
 182                 else
 183                         printf("ARRAY %s level=container num-devices=%d",
 184                                dev, array.nr_disks);
 185
 186                 if (container) {
 187                         printf(" container=%s", container);
 188                         printf(" member=%s", member);
 189                 } else {
 190                         if (sra && sra->array.major_version < 0)
 191                                 printf(" metadata=%s", sra->text_version);
 192                         else
 193                                 printf(" metadata=%02d.%02d",
 194                                        array.major_version, array.minor_version);
 195                 }
 196
 197                 /* Only try GET_BITMAP_FILE for 0.90.01 and later */
 198                 if (vers >= 9001 &&
 199                     ioctl(fd, GET_BITMAP_FILE, &bmf) == 0 &&
 200                     bmf.pathname[0]) {
 201                         printf(" bitmap=%s", bmf.pathname);
 202                 }
 203         } else {
 204                 mdu_bitmap_file_t bmf;
 205                 unsigned long long larray_size;
 206                 struct mdstat_ent *ms = mdstat_read(0, 0);
 207                 struct mdstat_ent *e;
 208                 int devnum = array.md_minor;
 209                 if (major(stb.st_rdev) != MD_MAJOR)
 210                         devnum = -1 - devnum;
 211
 212                 for (e=ms; e; e=e->next)
 213                         if (e->devnum == devnum)
 214                                 break;
 215                 if (!get_dev_size(fd, NULL, &larray_size))
 216                         larray_size = 0;
 217
 218                 printf("%s:\n", dev);
 219
 220                 if (container)
 221                         printf("      Container : %s, member %s\n", container, member);
 222                 else {
 223                 if (sra && sra->array.major_version < 0)
 224                         printf("        Version : %s\n", sra->text_version);
 225                 else
 226                         printf("        Version : %02d.%02d\n",
 227                                array.major_version, array.minor_version);
 228                 }
 229
 230                 atime = array.ctime;
 231                 if (atime)
 232                         printf("  Creation Time : %.24s\n", ctime(&atime));
 233                 if (array.raid_disks == 0) c = "container";
 234                 printf("     Raid Level : %s\n", c?c:"-unknown-");
 235                 if (larray_size)
 236                         printf("     Array Size : %llu%s\n", (larray_size>>10), human_size(larray_size));
 237                 if (array.level >= 1) {
 238                         if (array.major_version != 0 &&
 239                             (larray_size >= 0xFFFFFFFFULL|| array.size == 0)) {
 240                                 unsigned long long dsize = get_component_size(fd);
 241                                 if (dsize > 0)
 242                                         printf("  Used Dev Size : %llu%s\n",
 243                                                dsize,
 244                                          human_size((long long)dsize<<10));
 245                                 else
 246                                         printf("  Used Dev Size : unknown\n");
 247                         } else
 248                                 printf("  Used Dev Size : %d%s\n", array.size,
 249                                        human_size((long long)array.size<<10));
 250                 }
 251                 if (array.raid_disks)
 252                         printf("   Raid Devices : %d\n", array.raid_disks);
 253                 printf("  Total Devices : %d\n", array.nr_disks);
 254                 if (!container &&
 255                     ((sra == NULL && array.major_version == 0) ||
 256                      (sra && sra->array.major_version == 0)))
 257                         printf("Preferred Minor : %d\n", array.md_minor);
 258                 if (sra == NULL || sra->array.major_version >= 0)
 259                         printf("    Persistence : Superblock is %spersistent\n",
 260                                array.not_persistent?"not ":"");
 261                 printf("\n");
 262                 /* Only try GET_BITMAP_FILE for 0.90.01 and later */
 263                 if (vers >= 9001 &&
 264                     ioctl(fd, GET_BITMAP_FILE, &bmf) == 0 &&
 265                     bmf.pathname[0]) {
 266                         printf("  Intent Bitmap : %s\n", bmf.pathname);
 267                         printf("\n");
 268                 } else if (array.state & (1<<MD_SB_BITMAP_PRESENT))
 269                         printf("  Intent Bitmap : Internal\n\n");
 270                 atime = array.utime;
 271                 if (atime)
 272                         printf("    Update Time : %.24s\n", ctime(&atime));
 273                 if (array.raid_disks)
 274                         printf("          State : %s%s%s%s\n",
 275                                (array.state&(1<<MD_SB_CLEAN))?"clean":"active",
 276                                array.active_disks < array.raid_disks? ", degraded":"",
 277                                (!e || e->percent < 0) ? "" :
 278                                (e->resync) ? ", resyncing": ", recovering",
 279                                larray_size ? "": ", Not Started");
 280                 if (array.raid_disks)
 281                         printf(" Active Devices : %d\n", array.active_disks);
 282                 printf("Working Devices : %d\n", array.working_disks);
 283                 if (array.raid_disks) {
 284                         printf(" Failed Devices : %d\n", array.failed_disks);
 285                         printf("  Spare Devices : %d\n", array.spare_disks);
 286                 }
 287                 printf("\n");
 288                 if (array.level == 5) {
 289                         c = map_num(r5layout, array.layout);
 290                         printf("         Layout : %s\n", c?c:"-unknown-");
 291                 }
 292                 if (array.level == 10) {
 293                         printf("         Layout : near=%d, %s=%d\n",
 294                                array.layout&255, (array.layout&0x10000)?"offset":"far",
 295                                (array.layout>>8)&255);
 296                 }
 297                 switch (array.level) {
 298                 case 0:
 299                 case 4:
 300                 case 5:
 301                 case 10:
 302                 case 6:
 303                         if (array.chunk_size)
 304                                 printf("     Chunk Size : %dK\n\n",
 305                                        array.chunk_size/1024);
 306                         break;
 307                 case -1:
 308                         printf("       Rounding : %dK\n\n", array.chunk_size/1024);
 309                         break;
 310                 default: break;
 311                 }
 312
 313                 if (e && e->percent >= 0) {
 314                         printf(" Re%s Status : %d%% complete\n",
 315                                (st && st->sb && info.reshape_active)?
 316                                   "shape":"build",
 317                                e->percent);
 318                         is_rebuilding = 1;
 319                 }
 320                 free_mdstat(ms);
 321
 322                 if (st->sb && info.reshape_active) {
 323 #if 0
 324 This is pretty boring
 325                         printf("  Reshape pos'n : %llu%s\n", (unsigned long long) info.reshape_progress<<9,
 326                                human_size(info.reshape_progress<<9));
 327 #endif
 328                         if (info.delta_disks > 0)
 329                                 printf("  Delta Devices : %d, (%d->%d)\n",
 330                                        info.delta_disks, array.raid_disks - info.delta_disks, array.raid_disks);
 331                         if (info.delta_disks < 0)
 332                                 printf("  Delta Devices : %d, (%d->%d)\n",
 333                                        info.delta_disks, array.raid_disks, array.raid_disks + info.delta_disks);
 334                         if (info.new_level != array.level) {
 335                                 char *c = map_num(pers, info.new_level);
 336                                 printf("      New Level : %s\n", c?c:"-unknown-");
 337                         }
 338                         if (info.new_level != array.level ||
 339                             info.new_layout != array.layout) {
 340                                 if (info.new_level == 5) {
 341                                         char *c = map_num(r5layout, info.new_layout);
 342                                         printf("     New Layout : %s\n",
 343                                                c?c:"-unknown-");
 344                                 }
 345                                 if (info.new_level == 10) {
 346                                         printf("     New Layout : near=%d, %s=%d\n",
 347                                                info.new_layout&255,
 348                                                (info.new_layout&0x10000)?"offset":"far",
 349                                                (info.new_layout>>8)&255);
 350                                 }
 351                         }
 352                         if (info.new_chunk != array.chunk_size)
 353                                 printf("  New Chunksize : %dK\n", info.new_chunk/1024);
 354                         printf("\n");
 355                 } else if (e && e->percent >= 0)
 356                         printf("\n");
 357                 if (st && st->sb)
 358                         st->ss->detail_super(st, homehost);
 359
 360                 if (array.raid_disks == 0 && sra && sra->array.major_version == -1
 361                     && sra->array.minor_version == -2 && sra->text_version[0] != '/') {
 362                         /* This looks like a container.  Find any active arrays
 363                          * That claim to be a member.
 364                          */
 365                         DIR *dir = opendir("/sys/block");
 366                         struct dirent *de;
 367
 368                         printf("  Member Arrays :");
 369
 370                         while (dir && (de = readdir(dir)) != NULL) {
 371                                 char path[200];
 372                                 char vbuf[1024];
 373                                 int nlen = strlen(sra->sys_name);
 374                                 int dn;
 375                                 if (de->d_name[0] == '.')
 376                                         continue;
 377                                 sprintf(path, "/sys/block/%s/md/metadata_version",
 378                                         de->d_name);
 379                                 if (load_sys(path, vbuf) < 0)
 380                                         continue;
 381                                 if (strncmp(vbuf, "external:", 9) != 0 ||
 382                                     !is_subarray(sra->sys_name+9) ||
 383                                     strncmp(vbuf+10, sra->sys_name, nlen) != 0 ||
 384                                     vbuf[10+nlen] != '/')
 385                                         continue;
 386                                 dn = devname2devnum(de->d_name);
 387                                 printf(" %s", map_dev(dev2major(dn),
 388                                                       dev2minor(dn), 1));
 389                         }
 390                         if (dir)
 391                                 closedir(dir);
 392                         printf("\n\n");
 393                 }
 394
 395                 if (array.raid_disks)
 396                         printf("    Number   Major   Minor   RaidDevice State\n");
 397                 else
 398                         printf("    Number   Major   Minor   RaidDevice\n");
 399         }
 400         disks = malloc(max_disks * sizeof(mdu_disk_info_t));
 401         for (d=0; d<max_disks; d++) {
 402                 disks[d].state = (1<<MD_DISK_REMOVED);
 403                 disks[d].major = disks[d].minor = 0;
 404                 disks[d].number = disks[d].raid_disk = d;
 405         }
 406
 407         next = array.raid_disks;
 408         for (d=0; d < max_disks; d++) {
 409                 mdu_disk_info_t disk;
 410                 disk.number = d;
 411                 if (ioctl(fd, GET_DISK_INFO, &disk) < 0) {
 412                         if (d < array.raid_disks)
 413                                 fprintf(stderr, Name ": cannot get device detail for device %d: %s\n",
 414                                         d, strerror(errno));
 415                         continue;
 416                 }
 417                 if (disk.major == 0 && disk.minor == 0)
 418                         continue;
 419                 if (disk.raid_disk >= 0 && disk.raid_disk < array.raid_disks)
 420                         disks[disk.raid_disk] = disk;
 421                 else if (next < max_disks)
 422                         disks[next++] = disk;
 423         }
 424
 425         avail = calloc(array.raid_disks, 1);
 426         for (d= 0; d < max_disks; d++) {
 427                 char *dv;
 428                 mdu_disk_info_t disk = disks[d];
 429
 430                 if (d >= array.raid_disks &&
 431                     disk.major == 0 &&
 432                     disk.minor == 0)
 433                         continue;
 434                 if (!brief) {
 435                         if (d == array.raid_disks) printf("\n");
 436                         if (disk.raid_disk < 0)
 437                                 printf("   %5d   %5d    %5d        -     ",
 438                                        disk.number, disk.major, disk.minor);
 439                         else
 440                                 printf("   %5d   %5d    %5d    %5d     ",
 441                                        disk.number, disk.major, disk.minor, disk.raid_disk);
 442                 }
 443                 if (!brief && array.raid_disks) {
 444
 445                         if (disk.state & (1<<MD_DISK_FAULTY)) {
 446                                 printf(" faulty");
 447                                 if (disk.raid_disk < array.raid_disks &&
 448                                     disk.raid_disk >= 0)
 449                                         failed++;
 450                         }
 451                         if (disk.state & (1<<MD_DISK_ACTIVE)) printf(" active");
 452                         if (disk.state & (1<<MD_DISK_SYNC)) printf(" sync");
 453                         if (disk.state & (1<<MD_DISK_REMOVED)) printf(" removed");
 454                         if (disk.state & (1<<MD_DISK_WRITEMOSTLY)) printf(" writemostly");
 455                         if ((disk.state &
 456                              ((1<<MD_DISK_ACTIVE)|(1<<MD_DISK_SYNC)|(1<<MD_DISK_REMOVED)))
 457                             == 0) {
 458                                 printf(" spare");
 459                                 if (is_26) {
 460                                         if (disk.raid_disk < array.raid_disks && disk.raid_disk >= 0)
 461                                                 printf(" rebuilding");
 462                                 } else if (is_rebuilding && failed) {
 463                                         /* Taking a bit of a risk here, we remove the
 464                                          * device from the array, and then put it back.
 465                                          * If this fails, we are rebuilding
 466                                          */
 467                                         int err = ioctl(fd, HOT_REMOVE_DISK, makedev(disk.major, disk.minor));
 468                                         if (err == 0) ioctl(fd, HOT_ADD_DISK, makedev(disk.major, disk.minor));
 469                                         if (err && errno ==  EBUSY)
 470                                                 printf(" rebuilding");
 471                                 }
 472                         }
 473                 }
 474                 if (disk.state == 0) spares++;
 475                 if (test && d < array.raid_disks
 476                     && !(disk.state & (1<<MD_DISK_SYNC)))
 477                         rv |= 1;
 478                 if (d < array.raid_disks
 479                     && (disk.state & (1<<MD_DISK_SYNC))) {
 480                         avail_disks ++;
 481                         avail[d] = 1;
 482                 }
 483                 if ((dv=map_dev(disk.major, disk.minor, 0))) {
 484                         if (brief) {
 485                                 if (devices) {
 486                                         devices = realloc(devices,
 487                                                           strlen(devices)+1+strlen(dv)+1);
 488                                         strcat(strcat(devices,","),dv);
 489                                 } else
 490                                         devices = strdup(dv);
 491                         } else
 492                                 printf("   %s", dv);
 493                 }
 494                 if (!brief) printf("\n");
 495         }
 496         if (spares && brief && array.raid_disks) printf(" spares=%d", spares);
 497         if (brief && st && st->sb)
 498                 st->ss->brief_detail_super(st);
 499         st->ss->free_super(st);
 500
 501         if (brief > 1 && devices) printf("\n   devices=%s", devices);
 502         if (brief) printf("\n");
 503         if (test &&
 504             !enough(array.level, array.raid_disks, array.layout,
 505                     1, avail, avail_disks))
 506                 rv = 2;
 507
 508 out:
 509         close(fd);
 510         return rv;
 511 }