Detail.c

   1 /*
   2  * mdadm - manage Linux "md" devices aka RAID arrays.
   3  *
   4  * Copyright (C) 2001-2002 Neil Brown <neilb@cse.unsw.edu.au>
   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 test)
  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
  59         void *super = NULL;
  60         int rv = test ? 4 : 1;
  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         st = super_by_version(array.major_version, array.minor_version);
  91
  92         if (fstat(fd, &stb) != 0 && !S_ISBLK(stb.st_mode))
  93                 stb.st_rdev = 0;
  94         rv = 0;
  95
  96         if (st) max_disks = st->max_devs;
  97
  98         /* try to load a superblock */
  99         for (d= 0; d<max_disks; d++) {
 100                 mdu_disk_info_t disk;
 101                 char *dv;
 102                 disk.number = d;
 103                 if (ioctl(fd, GET_DISK_INFO, &disk) < 0)
 104                         continue;
 105                 if (d >= array.raid_disks &&
 106                     disk.major == 0 &&
 107                     disk.minor == 0)
 108                         continue;
 109                 if ((dv=map_dev(disk.major, disk.minor, 1))) {
 110                         if (!super && (disk.state & (1<<MD_DISK_ACTIVE))) {
 111                                 /* try to read the superblock from this device
 112                                  * to get more info
 113                                  */
 114                                 int fd2 = dev_open(dv, O_RDONLY);
 115                                 if (fd2 >=0 && st &&
 116                                     st->ss->load_super(st, fd2, &super, NULL) == 0) {
 117                                         st->ss->getinfo_super(&info, super);
 118                                         if (info.array.ctime != array.ctime ||
 119                                             info.array.level != array.level) {
 120                                                 free(super);
 121                                                 super = NULL;
 122                                         }
 123                                 }
 124                                 if (fd2 >= 0) close(fd2);
 125                         }
 126                 }
 127         }
 128
 129         /* Ok, we have some info to print... */
 130         c = map_num(pers, array.level);
 131         if (brief)
 132                 printf("ARRAY %s level=%s num-devices=%d", dev, c?c:"-unknown-",array.raid_disks );
 133         else {
 134                 mdu_bitmap_file_t bmf;
 135                 unsigned long array_size;
 136                 unsigned long long larray_size;
 137                 struct mdstat_ent *ms = mdstat_read(0, 0);
 138                 struct mdstat_ent *e;
 139                 int devnum = array.md_minor;
 140                 if (major(stb.st_rdev) != MD_MAJOR)
 141                         devnum = -1 - devnum;
 142
 143                 for (e=ms; e; e=e->next)
 144                         if (e->devnum == devnum)
 145                                 break;
 146 #ifdef BLKGETSIZE64
 147                 if (ioctl(fd, BLKGETSIZE64, &larray_size)==0)
 148                         ;
 149                 else
 150 #endif
 151                         if (ioctl(fd, BLKGETSIZE, &array_size)==0) {
 152                                 larray_size = array_size;
 153                                 larray_size <<= 9;
 154                         }
 155
 156                 else larray_size = 0;
 157
 158                 printf("%s:\n", dev);
 159                 printf("        Version : %02d.%02d.%02d\n",
 160                        array.major_version, array.minor_version, array.patch_version);
 161                 atime = array.ctime;
 162                 printf("  Creation Time : %.24s\n", ctime(&atime));
 163                 printf("     Raid Level : %s\n", c?c:"-unknown-");
 164                 if (larray_size)
 165                         printf("     Array Size : %llu%s\n", (larray_size>>10), human_size(larray_size));
 166                 if (array.level >= 1) {
 167                         if (array.major_version != 0 &&
 168                             (larray_size >= 0xFFFFFFFFULL|| array.size == 0)) {
 169                                 unsigned long long dsize = get_component_size(fd);
 170                                 if (dsize > 0)
 171                                         printf("    Device Size : %llu%s\n", dsize, human_size((long long)array.size<<10));
 172                                 else
 173                                         printf("    Device Size : unknown\n");
 174                         } else
 175                                 printf("    Device Size : %d%s\n", array.size, human_size((long long)array.size<<10));
 176                 }
 177                 printf("   Raid Devices : %d\n", array.raid_disks);
 178                 printf("  Total Devices : %d\n", array.nr_disks);
 179                 printf("Preferred Minor : %d\n", array.md_minor);
 180                 printf("    Persistence : Superblock is %spersistent\n",
 181                        array.not_persistent?"not ":"");
 182                 printf("\n");
 183                 /* Only try GET_BITMAP_FILE for 0.90.01 and later */
 184                 if (vers >= 9001 &&
 185                     ioctl(fd, GET_BITMAP_FILE, &bmf) == 0 &&
 186                     bmf.pathname[0]) {
 187                         printf("  Intent Bitmap : %s\n", bmf.pathname);
 188                         printf("\n");
 189                 } else if (array.state & (1<<MD_SB_BITMAP_PRESENT))
 190                         printf("  Intent Bitmap : Internal\n\n");
 191                 atime = array.utime;
 192                 printf("    Update Time : %.24s\n", ctime(&atime));
 193                 printf("          State : %s%s%s\n",
 194                        (array.state&(1<<MD_SB_CLEAN))?"clean":"active",
 195                        array.active_disks < array.raid_disks? ", degraded":"",
 196                        (!e || e->percent < 0) ? "" :
 197                         (e->resync) ? ", resyncing": ", recovering");
 198                 printf(" Active Devices : %d\n", array.active_disks);
 199                 printf("Working Devices : %d\n", array.working_disks);
 200                 printf(" Failed Devices : %d\n", array.failed_disks);
 201                 printf("  Spare Devices : %d\n", array.spare_disks);
 202                 printf("\n");
 203                 if (array.level == 5) {
 204                         c = map_num(r5layout, array.layout);
 205                         printf("         Layout : %s\n", c?c:"-unknown-");
 206                 }
 207                 if (array.level == 10) {
 208                         printf("         Layout : near=%d, far=%d\n",
 209                                array.layout&255, (array.layout>>8)&255);
 210                 }
 211                 switch (array.level) {
 212                 case 0:
 213                 case 4:
 214                 case 5:
 215                 case 10:
 216                 case 6:
 217                         printf("     Chunk Size : %dK\n\n", array.chunk_size/1024);
 218                         break;
 219                 case -1:
 220                         printf("       Rounding : %dK\n\n", array.chunk_size/1024);
 221                         break;
 222                 default: break;
 223                 }
 224
 225                 if (e && e->percent >= 0) {
 226                         printf(" Re%s Status : %d%% complete\n",
 227                                (super && info.reshape_active)? "shape":"build",
 228                                e->percent);
 229                         is_rebuilding = 1;
 230                 }
 231                 free_mdstat(ms);
 232
 233                 if (super && info.reshape_active) {
 234 #if 0
 235 This is pretty boring
 236                         printf("  Reshape pos'n : %llu%s\n", (unsigned long long) info.reshape_progress<<9,
 237                                human_size(info.reshape_progress<<9));
 238 #endif
 239                         if (info.delta_disks > 0)
 240                                 printf("  Delta Devices : %d, (%d->%d)\n",
 241                                        info.delta_disks, array.raid_disks - info.delta_disks, array.raid_disks);
 242                         if (info.delta_disks < 0)
 243                                 printf("  Delta Devices : %d, (%d->%d)\n",
 244                                        info.delta_disks, array.raid_disks, array.raid_disks + info.delta_disks);
 245                         if (info.new_level != array.level) {
 246                                 char *c = map_num(pers, info.new_level);
 247                                 printf("      New Level : %s\n", c?c:"-unknown-");
 248                         }
 249                         if (info.new_level != array.level ||
 250                             info.new_layout != array.layout) {
 251                                 if (info.new_level == 5) {
 252                                         char *c = map_num(r5layout, info.new_layout);
 253                                         printf("     New Layout : %s\n",
 254                                                c?c:"-unknown-");
 255                                 }
 256                                 if (info.new_level == 10) {
 257                                         printf("     New Layout : near=%d, far=%d\n",
 258                                                info.new_layout&255,
 259                                                (info.new_layout>>8)&255);
 260                                 }
 261                         }
 262                         if (info.new_chunk != array.chunk_size)
 263                                 printf("  New Chunksize : %dK\n", info.new_chunk/1024);
 264                         printf("\n");
 265                 } else if (e && e->percent >= 0)
 266                         printf("\n");
 267                 if (super && st)
 268                         st->ss->detail_super(super);
 269
 270                 printf("    Number   Major   Minor   RaidDevice State\n");
 271         }
 272         disks = malloc(max_disks * sizeof(mdu_disk_info_t));
 273         for (d=0; d<max_disks; d++) {
 274                 disks[d].state = (1<<MD_DISK_REMOVED);
 275                 disks[d].major = disks[d].minor = 0;
 276                 disks[d].number = disks[d].raid_disk = d;
 277         }
 278
 279         next = array.raid_disks;
 280         for (d=0; d < max_disks; d++) {
 281                 mdu_disk_info_t disk;
 282                 disk.number = d;
 283                 if (ioctl(fd, GET_DISK_INFO, &disk) < 0) {
 284                         if (d < array.raid_disks)
 285                                 fprintf(stderr, Name ": cannot get device detail for device %d: %s\n",
 286                                         d, strerror(errno));
 287                         continue;
 288                 }
 289                 if (disk.major == 0 && disk.minor == 0)
 290                         continue;
 291                 if (disk.raid_disk >= 0 && disk.raid_disk < array.raid_disks)
 292                         disks[disk.raid_disk] = disk;
 293                 else if (next < max_disks)
 294                         disks[next++] = disk;
 295         }
 296
 297         for (d= 0; d < max_disks; d++) {
 298                 char *dv;
 299                 mdu_disk_info_t disk = disks[d];
 300
 301                 if (d >= array.raid_disks &&
 302                     disk.major == 0 &&
 303                     disk.minor == 0)
 304                         continue;
 305                 if (!brief) {
 306                         if (d == array.raid_disks) printf("\n");
 307                         if (disk.raid_disk < 0)
 308                                 printf("   %5d   %5d    %5d        -     ",
 309                                        disk.number, disk.major, disk.minor);
 310                         else
 311                                 printf("   %5d   %5d    %5d    %5d     ",
 312                                        disk.number, disk.major, disk.minor, disk.raid_disk);
 313                         if (disk.state & (1<<MD_DISK_FAULTY)) {
 314                                 printf(" faulty");
 315                                 if (disk.raid_disk < array.raid_disks &&
 316                                     disk.raid_disk >= 0)
 317                                         failed++;
 318                         }
 319                         if (disk.state & (1<<MD_DISK_ACTIVE)) printf(" active");
 320                         if (disk.state & (1<<MD_DISK_SYNC)) printf(" sync");
 321                         if (disk.state & (1<<MD_DISK_REMOVED)) printf(" removed");
 322                         if (disk.state & (1<<MD_DISK_WRITEMOSTLY)) printf(" writemostly");
 323                         if ((disk.state &
 324                              ((1<<MD_DISK_ACTIVE)|(1<<MD_DISK_SYNC)|(1<<MD_DISK_REMOVED)))
 325                             == 0) {
 326                                 printf(" spare");
 327                                 if (is_26) {
 328                                         if (disk.raid_disk < array.raid_disks && disk.raid_disk >= 0)
 329                                                 printf(" rebuilding");
 330                                 } else if (is_rebuilding && failed) {
 331                                         /* Taking a bit of a risk here, we remove the
 332                                          * device from the array, and then put it back.
 333                                          * If this fails, we are rebuilding
 334                                          */
 335                                         int err = ioctl(fd, HOT_REMOVE_DISK, makedev(disk.major, disk.minor));
 336                                         if (err == 0) ioctl(fd, HOT_ADD_DISK, makedev(disk.major, disk.minor));
 337                                         if (err && errno ==  EBUSY)
 338                                                 printf(" rebuilding");
 339                                 }
 340                         }
 341                 }
 342                 if (disk.state == 0) spares++;
 343                 if (test && d < array.raid_disks && disk.state & (1<<MD_DISK_FAULTY)) {
 344                         if ((rv & 1) && (array.level ==4 || array.level == 5))
 345                                 rv |= 2;
 346                         rv |= 1;
 347                 }
 348                 if ((dv=map_dev(disk.major, disk.minor, 0))) {
 349                         if (brief) {
 350                                 if (devices) {
 351                                         devices = realloc(devices,
 352                                                           strlen(devices)+1+strlen(dv)+1);
 353                                         strcat(strcat(devices,","),dv);
 354                                 } else
 355                                         devices = strdup(dv);
 356                         } else
 357                                 printf("   %s", dv);
 358                 }
 359                 if (!brief) printf("\n");
 360         }
 361         if (spares && brief) printf(" spares=%d", spares);
 362         if (super && brief && st)
 363                 st->ss->brief_detail_super(super);
 364
 365         if (brief > 1 && devices) printf("\n   devices=%s", devices);
 366         if (brief) printf("\n");
 367         if (test && (rv&2)) rv &= ~1;
 368         close(fd);
 369         return rv;
 370 }