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
  34 int Detail(char *dev, int brief, int export, int test, char *homehost)
  35 {
  36         /*
  37          * Print out details for an md array by using
  38          * GET_ARRAY_INFO and GET_DISK_INFO ioctl calls
  39          */
  40
  41         int fd = open(dev, O_RDONLY, 0);
  42         int vers;
  43         mdu_array_info_t array;
  44         mdu_disk_info_t *disks;
  45         int next;
  46         int d;
  47         time_t atime;
  48         char *c;
  49         char *devices = NULL;
  50         int spares = 0;
  51         struct stat stb;
  52         int is_26 = get_linux_version() >= 2006000;
  53         int is_rebuilding = 0;
  54         int failed = 0;
  55         struct supertype *st = NULL;
  56         int max_disks = MD_SB_DISKS; /* just a default */
  57         struct mdinfo info;
  58         struct mdinfo *sra;
  59
  60         int rv = test ? 4 : 1;
  61         int avail_disks = 0;
  62         char *avail;
  63
  64         if (fd < 0) {
  65                 fprintf(stderr, Name ": cannot open %s: %s\n",
  66                         dev, strerror(errno));
  67                 return rv;
  68         }
  69         vers = md_get_version(fd);
  70         if (vers < 0) {
  71                 fprintf(stderr, Name ": %s does not appear to be an md device\n",
  72                         dev);
  73                 close(fd);
  74                 return rv;
  75         }
  76         if (vers < 9000) {
  77                 fprintf(stderr, Name ": cannot get detail for md device %s: driver version too old.\n",
  78                         dev);
  79                 close(fd);
  80                 return rv;
  81         }
  82         if (ioctl(fd, GET_ARRAY_INFO, &array)<0) {
  83                 if (errno == ENODEV)
  84                         fprintf(stderr, Name ": md device %s does not appear to be active.\n",
  85                                 dev);
  86                 else
  87                         fprintf(stderr, Name ": cannot get array detail for %s: %s\n",
  88                                 dev, strerror(errno));
  89                 close(fd);
  90                 return rv;
  91         }
  92         sra = sysfs_read(fd, 0, GET_VERSION);
  93         st = super_by_fd(fd);
  94
  95         if (fstat(fd, &stb) != 0 && !S_ISBLK(stb.st_mode))
  96                 stb.st_rdev = 0;
  97         rv = 0;
  98
  99         if (st) max_disks = st->max_devs;
 100
 101         /* try to load a superblock */
 102         for (d= 0; d<max_disks; d++) {
 103                 mdu_disk_info_t disk;
 104                 char *dv;
 105                 disk.number = d;
 106                 if (ioctl(fd, GET_DISK_INFO, &disk) < 0)
 107                         continue;
 108                 if (d >= array.raid_disks &&
 109                     disk.major == 0 &&
 110                     disk.minor == 0)
 111                         continue;
 112                 if ((dv=map_dev(disk.major, disk.minor, 1))) {
 113                         if ((!st || !st->sb) &&
 114                             (disk.state & (1<<MD_DISK_ACTIVE))) {
 115                                 /* try to read the superblock from this device
 116                                  * to get more info
 117                                  */
 118                                 int fd2 = dev_open(dv, O_RDONLY);
 119                                 if (fd2 >=0 && st &&
 120                                     st->ss->load_super(st, fd2, NULL) == 0) {
 121                                         st->ss->getinfo_super(st, &info);
 122                                         if (info.array.ctime != array.ctime ||
 123                                             info.array.level != array.level)
 124                                                 st->ss->free_super(st);
 125                                 }
 126                                 if (fd2 >= 0) close(fd2);
 127                         }
 128                 }
 129         }
 130
 131         /* Ok, we have some info to print... */
 132         c = map_num(pers, array.level);
 133
 134         if (export) {
 135                 if (c)
 136                         printf("MD_LEVEL=%s\n", c);
 137                 printf("MD_DEVICES=%d\n", array.raid_disks);
 138                 if (sra && sra->array.major_version < 0)
 139                         printf("MD_METADATA=%s\n", sra->text_version);
 140                 else
 141                         printf("MD_METADATA=%02d.%02d\n",
 142                                array.major_version, array.minor_version);
 143
 144                 if (st && st->sb)
 145                         st->ss->export_detail_super(st);
 146                 goto out;
 147         }
 148
 149         if (brief) {
 150                 printf("ARRAY %s level=%s num-devices=%d", dev,
 151                        c?c:"-unknown-",
 152                        array.raid_disks );
 153                 if (sra && sra->array.major_version < 0)
 154                         printf(" metadata=%s", sra->text_version);
 155                 else
 156                         printf(" metadata=%02d.%02d",
 157                                array.major_version, array.minor_version);
 158         } else {
 159                 mdu_bitmap_file_t bmf;
 160                 unsigned long long larray_size;
 161                 struct mdstat_ent *ms = mdstat_read(0, 0);
 162                 struct mdstat_ent *e;
 163                 int devnum = array.md_minor;
 164                 if (major(stb.st_rdev) != MD_MAJOR)
 165                         devnum = -1 - devnum;
 166
 167                 for (e=ms; e; e=e->next)
 168                         if (e->devnum == devnum)
 169                                 break;
 170                 if (!get_dev_size(fd, NULL, &larray_size))
 171                         larray_size = 0;
 172
 173                 printf("%s:\n", dev);
 174
 175                 if (sra && sra->array.major_version < 0)
 176                         printf("        Version : %s\n", sra->text_version);
 177                 else
 178                         printf("        Version : %02d.%02d\n",
 179                                array.major_version, array.minor_version);
 180
 181                 atime = array.ctime;
 182                 printf("  Creation Time : %.24s\n", ctime(&atime));
 183                 if (array.raid_disks == 0) c = "container";
 184                 printf("     Raid Level : %s\n", c?c:"-unknown-");
 185                 if (larray_size)
 186                         printf("     Array Size : %llu%s\n", (larray_size>>10), human_size(larray_size));
 187                 if (array.level >= 1) {
 188                         if (array.major_version != 0 &&
 189                             (larray_size >= 0xFFFFFFFFULL|| array.size == 0)) {
 190                                 unsigned long long dsize = get_component_size(fd);
 191                                 if (dsize > 0)
 192                                         printf("  Used Dev Size : %llu%s\n",
 193                                                dsize,
 194                                          human_size((long long)dsize<<10));
 195                                 else
 196                                         printf("  Used Dev Size : unknown\n");
 197                         } else
 198                                 printf("  Used Dev Size : %d%s\n", array.size,
 199                                        human_size((long long)array.size<<10));
 200                 }
 201                 printf("   Raid Devices : %d\n", array.raid_disks);
 202                 printf("  Total Devices : %d\n", array.nr_disks);
 203                 printf("Preferred Minor : %d\n", array.md_minor);
 204                 if (sra == NULL || sra->array.major_version >= 0)
 205                         printf("    Persistence : Superblock is %spersistent\n",
 206                                array.not_persistent?"not ":"");
 207                 printf("\n");
 208                 /* Only try GET_BITMAP_FILE for 0.90.01 and later */
 209                 if (vers >= 9001 &&
 210                     ioctl(fd, GET_BITMAP_FILE, &bmf) == 0 &&
 211                     bmf.pathname[0]) {
 212                         printf("  Intent Bitmap : %s\n", bmf.pathname);
 213                         printf("\n");
 214                 } else if (array.state & (1<<MD_SB_BITMAP_PRESENT))
 215                         printf("  Intent Bitmap : Internal\n\n");
 216                 atime = array.utime;
 217                 printf("    Update Time : %.24s\n", ctime(&atime));
 218                 printf("          State : %s%s%s%s\n",
 219                        (array.state&(1<<MD_SB_CLEAN))?"clean":"active",
 220                        array.active_disks < array.raid_disks? ", degraded":"",
 221                        (!e || e->percent < 0) ? "" :
 222                         (e->resync) ? ", resyncing": ", recovering",
 223                        larray_size ? "": ", Not Started");
 224                 printf(" Active Devices : %d\n", array.active_disks);
 225                 printf("Working Devices : %d\n", array.working_disks);
 226                 printf(" Failed Devices : %d\n", array.failed_disks);
 227                 printf("  Spare Devices : %d\n", array.spare_disks);
 228                 printf("\n");
 229                 if (array.level == 5) {
 230                         c = map_num(r5layout, array.layout);
 231                         printf("         Layout : %s\n", c?c:"-unknown-");
 232                 }
 233                 if (array.level == 10) {
 234                         printf("         Layout : near=%d, %s=%d\n",
 235                                array.layout&255, (array.layout&0x10000)?"offset":"far",
 236                                (array.layout>>8)&255);
 237                 }
 238                 switch (array.level) {
 239                 case 0:
 240                 case 4:
 241                 case 5:
 242                 case 10:
 243                 case 6:
 244                         if (array.chunk_size)
 245                                 printf("     Chunk Size : %dK\n\n",
 246                                        array.chunk_size/1024);
 247                         break;
 248                 case -1:
 249                         printf("       Rounding : %dK\n\n", array.chunk_size/1024);
 250                         break;
 251                 default: break;
 252                 }
 253
 254                 if (e && e->percent >= 0) {
 255                         printf(" Re%s Status : %d%% complete\n",
 256                                (st && st->sb && info.reshape_active)?
 257                                   "shape":"build",
 258                                e->percent);
 259                         is_rebuilding = 1;
 260                 }
 261                 free_mdstat(ms);
 262
 263                 if (st->sb && info.reshape_active) {
 264 #if 0
 265 This is pretty boring
 266                         printf("  Reshape pos'n : %llu%s\n", (unsigned long long) info.reshape_progress<<9,
 267                                human_size(info.reshape_progress<<9));
 268 #endif
 269                         if (info.delta_disks > 0)
 270                                 printf("  Delta Devices : %d, (%d->%d)\n",
 271                                        info.delta_disks, array.raid_disks - info.delta_disks, array.raid_disks);
 272                         if (info.delta_disks < 0)
 273                                 printf("  Delta Devices : %d, (%d->%d)\n",
 274                                        info.delta_disks, array.raid_disks, array.raid_disks + info.delta_disks);
 275                         if (info.new_level != array.level) {
 276                                 char *c = map_num(pers, info.new_level);
 277                                 printf("      New Level : %s\n", c?c:"-unknown-");
 278                         }
 279                         if (info.new_level != array.level ||
 280                             info.new_layout != array.layout) {
 281                                 if (info.new_level == 5) {
 282                                         char *c = map_num(r5layout, info.new_layout);
 283                                         printf("     New Layout : %s\n",
 284                                                c?c:"-unknown-");
 285                                 }
 286                                 if (info.new_level == 10) {
 287                                         printf("     New Layout : near=%d, %s=%d\n",
 288                                                info.new_layout&255,
 289                                                (info.new_layout&0x10000)?"offset":"far",
 290                                                (info.new_layout>>8)&255);
 291                                 }
 292                         }
 293                         if (info.new_chunk != array.chunk_size)
 294                                 printf("  New Chunksize : %dK\n", info.new_chunk/1024);
 295                         printf("\n");
 296                 } else if (e && e->percent >= 0)
 297                         printf("\n");
 298                 if (st && st->sb)
 299                         st->ss->detail_super(st, homehost);
 300
 301                 printf("    Number   Major   Minor   RaidDevice State\n");
 302         }
 303         disks = malloc(max_disks * sizeof(mdu_disk_info_t));
 304         for (d=0; d<max_disks; d++) {
 305                 disks[d].state = (1<<MD_DISK_REMOVED);
 306                 disks[d].major = disks[d].minor = 0;
 307                 disks[d].number = disks[d].raid_disk = d;
 308         }
 309
 310         next = array.raid_disks;
 311         for (d=0; d < max_disks; d++) {
 312                 mdu_disk_info_t disk;
 313                 disk.number = d;
 314                 if (ioctl(fd, GET_DISK_INFO, &disk) < 0) {
 315                         if (d < array.raid_disks)
 316                                 fprintf(stderr, Name ": cannot get device detail for device %d: %s\n",
 317                                         d, strerror(errno));
 318                         continue;
 319                 }
 320                 if (disk.major == 0 && disk.minor == 0)
 321                         continue;
 322                 if (disk.raid_disk >= 0 && disk.raid_disk < array.raid_disks)
 323                         disks[disk.raid_disk] = disk;
 324                 else if (next < max_disks)
 325                         disks[next++] = disk;
 326         }
 327
 328         avail = calloc(array.raid_disks, 1);
 329         for (d= 0; d < max_disks; d++) {
 330                 char *dv;
 331                 mdu_disk_info_t disk = disks[d];
 332
 333                 if (d >= array.raid_disks &&
 334                     disk.major == 0 &&
 335                     disk.minor == 0)
 336                         continue;
 337                 if (!brief) {
 338                         if (d == array.raid_disks) printf("\n");
 339                         if (disk.raid_disk < 0)
 340                                 printf("   %5d   %5d    %5d        -     ",
 341                                        disk.number, disk.major, disk.minor);
 342                         else
 343                                 printf("   %5d   %5d    %5d    %5d     ",
 344                                        disk.number, disk.major, disk.minor, disk.raid_disk);
 345                         if (disk.state & (1<<MD_DISK_FAULTY)) {
 346                                 printf(" faulty");
 347                                 if (disk.raid_disk < array.raid_disks &&
 348                                     disk.raid_disk >= 0)
 349                                         failed++;
 350                         }
 351                         if (disk.state & (1<<MD_DISK_ACTIVE)) printf(" active");
 352                         if (disk.state & (1<<MD_DISK_SYNC)) printf(" sync");
 353                         if (disk.state & (1<<MD_DISK_REMOVED)) printf(" removed");
 354                         if (disk.state & (1<<MD_DISK_WRITEMOSTLY)) printf(" writemostly");
 355                         if ((disk.state &
 356                              ((1<<MD_DISK_ACTIVE)|(1<<MD_DISK_SYNC)|(1<<MD_DISK_REMOVED)))
 357                             == 0) {
 358                                 printf(" spare");
 359                                 if (is_26) {
 360                                         if (disk.raid_disk < array.raid_disks && disk.raid_disk >= 0)
 361                                                 printf(" rebuilding");
 362                                 } else if (is_rebuilding && failed) {
 363                                         /* Taking a bit of a risk here, we remove the
 364                                          * device from the array, and then put it back.
 365                                          * If this fails, we are rebuilding
 366                                          */
 367                                         int err = ioctl(fd, HOT_REMOVE_DISK, makedev(disk.major, disk.minor));
 368                                         if (err == 0) ioctl(fd, HOT_ADD_DISK, makedev(disk.major, disk.minor));
 369                                         if (err && errno ==  EBUSY)
 370                                                 printf(" rebuilding");
 371                                 }
 372                         }
 373                 }
 374                 if (disk.state == 0) spares++;
 375                 if (test && d < array.raid_disks
 376                     && !(disk.state & (1<<MD_DISK_SYNC)))
 377                         rv |= 1;
 378                 if (d < array.raid_disks
 379                     && (disk.state & (1<<MD_DISK_SYNC))) {
 380                         avail_disks ++;
 381                         avail[d] = 1;
 382                 }
 383                 if ((dv=map_dev(disk.major, disk.minor, 0))) {
 384                         if (brief) {
 385                                 if (devices) {
 386                                         devices = realloc(devices,
 387                                                           strlen(devices)+1+strlen(dv)+1);
 388                                         strcat(strcat(devices,","),dv);
 389                                 } else
 390                                         devices = strdup(dv);
 391                         } else
 392                                 printf("   %s", dv);
 393                 }
 394                 if (!brief) printf("\n");
 395         }
 396         if (spares && brief) printf(" spares=%d", spares);
 397         if (brief && st && st->sb)
 398                 st->ss->brief_detail_super(st);
 399         st->ss->free_super(st);
 400
 401         if (brief > 1 && devices) printf("\n   devices=%s", devices);
 402         if (brief) printf("\n");
 403         if (test &&
 404             !enough(array.level, array.raid_disks, array.layout,
 405                     1, avail, avail_disks))
 406                 rv = 2;
 407
 408 out:
 409         close(fd);
 410         return rv;
 411 }