cmds-inspect-dump-super.c

   1 /*
   2  * This program is free software; you can redistribute it and/or
   3  * modify it under the terms of the GNU General Public
   4  * License v2 as published by the Free Software Foundation.
   5  *
   6  * This program is distributed in the hope that it will be useful,
   7  * but WITHOUT ANY WARRANTY; without even the implied warranty of
   8  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
   9  * General Public License for more details.
  10  *
  11  * You should have received a copy of the GNU General Public
  12  * License along with this program; if not, write to the
  13  * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
  14  * Boston, MA 021110-1307, USA.
  15  */
  16
  17 #include "kerncompat.h"
  18 #include <stdio.h>
  19 #include <stdlib.h>
  20 #include <unistd.h>
  21 #include <fcntl.h>
  22 #include <sys/stat.h>
  23 #include <ctype.h>
  24 #include <uuid/uuid.h>
  25 #include <errno.h>
  26 #include <getopt.h>
  27
  28 #include "ctree.h"
  29 #include "disk-io.h"
  30 #include "print-tree.h"
  31 #include "transaction.h"
  32 #include "list.h"
  33 #include "utils.h"
  34 #include "commands.h"
  35 #include "crc32c.h"
  36 #include "cmds-inspect-dump-super.h"
  37 #include "help.h"
  38
  39 static int check_csum_sblock(void *sb, int csum_size)
  40 {
  41         u8 result[BTRFS_CSUM_SIZE];
  42         u32 crc = ~(u32)0;
  43
  44         crc = btrfs_csum_data((char *)sb + BTRFS_CSUM_SIZE,
  45                                 crc, BTRFS_SUPER_INFO_SIZE - BTRFS_CSUM_SIZE);
  46         btrfs_csum_final(crc, result);
  47
  48         return !memcmp(sb, &result, csum_size);
  49 }
  50
  51 static void print_sys_chunk_array(struct btrfs_super_block *sb)
  52 {
  53         struct extent_buffer *buf;
  54         struct btrfs_disk_key *disk_key;
  55         struct btrfs_chunk *chunk;
  56         u8 *array_ptr;
  57         unsigned long sb_array_offset;
  58         u32 num_stripes;
  59         u32 array_size;
  60         u32 len = 0;
  61         u32 cur_offset;
  62         struct btrfs_key key;
  63         int item;
  64
  65         buf = malloc(sizeof(*buf) + sizeof(*sb));
  66         if (!buf) {
  67                 error("not enough memory");
  68                 return;
  69         }
  70         write_extent_buffer(buf, sb, 0, sizeof(*sb));
  71         buf->len = sizeof(*sb);
  72         array_size = btrfs_super_sys_array_size(sb);
  73
  74         array_ptr = sb->sys_chunk_array;
  75         sb_array_offset = offsetof(struct btrfs_super_block, sys_chunk_array);
  76
  77         if (array_size > BTRFS_SYSTEM_CHUNK_ARRAY_SIZE) {
  78                 error("sys_array_size %u shouldn't exceed %u bytes",
  79                                 array_size, BTRFS_SYSTEM_CHUNK_ARRAY_SIZE);
  80                 goto out;
  81         }
  82
  83         cur_offset = 0;
  84         item = 0;
  85
  86         while (cur_offset < array_size) {
  87                 disk_key = (struct btrfs_disk_key *)array_ptr;
  88                 len = sizeof(*disk_key);
  89                 if (cur_offset + len > array_size)
  90                         goto out_short_read;
  91
  92                 btrfs_disk_key_to_cpu(&key, disk_key);
  93
  94                 array_ptr += len;
  95                 sb_array_offset += len;
  96                 cur_offset += len;
  97
  98                 printf("\titem %d ", item);
  99                 btrfs_print_key(disk_key);
 100                 putchar('\n');
 101
 102                 if (key.type == BTRFS_CHUNK_ITEM_KEY) {
 103                         chunk = (struct btrfs_chunk *)sb_array_offset;
 104                         /*
 105                          * At least one btrfs_chunk with one stripe must be
 106                          * present, exact stripe count check comes afterwards
 107                          */
 108                         len = btrfs_chunk_item_size(1);
 109                         if (cur_offset + len > array_size)
 110                                 goto out_short_read;
 111
 112                         num_stripes = btrfs_chunk_num_stripes(buf, chunk);
 113                         if (!num_stripes) {
 114                                 error(
 115                         "invalid number of stripes %u in sys_array at offset %u",
 116                                         num_stripes, cur_offset);
 117                                 break;
 118                         }
 119                         len = btrfs_chunk_item_size(num_stripes);
 120                         if (cur_offset + len > array_size)
 121                                 goto out_short_read;
 122                         print_chunk(buf, chunk);
 123                 } else {
 124                         error("unexpected item type %u in sys_array at offset %u",
 125                                 (u32)key.type, cur_offset);
 126                         break;
 127                 }
 128                 array_ptr += len;
 129                 sb_array_offset += len;
 130                 cur_offset += len;
 131
 132                 item++;
 133         }
 134
 135 out:
 136         free(buf);
 137         return;
 138
 139 out_short_read:
 140         error("sys_array too short to read %u bytes at offset %u",
 141                         len, cur_offset);
 142         free(buf);
 143 }
 144
 145 static int empty_backup(struct btrfs_root_backup *backup)
 146 {
 147         if (backup == NULL ||
 148                 (backup->tree_root == 0 &&
 149                  backup->tree_root_gen == 0))
 150                 return 1;
 151         return 0;
 152 }
 153
 154 static void print_root_backup(struct btrfs_root_backup *backup)
 155 {
 156         printf("\t\tbackup_tree_root:\t%llu\tgen: %llu\tlevel: %d\n",
 157                         btrfs_backup_tree_root(backup),
 158                         btrfs_backup_tree_root_gen(backup),
 159                         btrfs_backup_tree_root_level(backup));
 160         printf("\t\tbackup_chunk_root:\t%llu\tgen: %llu\tlevel: %d\n",
 161                         btrfs_backup_chunk_root(backup),
 162                         btrfs_backup_chunk_root_gen(backup),
 163                         btrfs_backup_chunk_root_level(backup));
 164         printf("\t\tbackup_extent_root:\t%llu\tgen: %llu\tlevel: %d\n",
 165                         btrfs_backup_extent_root(backup),
 166                         btrfs_backup_extent_root_gen(backup),
 167                         btrfs_backup_extent_root_level(backup));
 168         printf("\t\tbackup_fs_root:\t\t%llu\tgen: %llu\tlevel: %d\n",
 169                         btrfs_backup_fs_root(backup),
 170                         btrfs_backup_fs_root_gen(backup),
 171                         btrfs_backup_fs_root_level(backup));
 172         printf("\t\tbackup_dev_root:\t%llu\tgen: %llu\tlevel: %d\n",
 173                         btrfs_backup_dev_root(backup),
 174                         btrfs_backup_dev_root_gen(backup),
 175                         btrfs_backup_dev_root_level(backup));
 176         printf("\t\tbackup_csum_root:\t%llu\tgen: %llu\tlevel: %d\n",
 177                         btrfs_backup_csum_root(backup),
 178                         btrfs_backup_csum_root_gen(backup),
 179                         btrfs_backup_csum_root_level(backup));
 180
 181         printf("\t\tbackup_total_bytes:\t%llu\n",
 182                                         btrfs_backup_total_bytes(backup));
 183         printf("\t\tbackup_bytes_used:\t%llu\n",
 184                                         btrfs_backup_bytes_used(backup));
 185         printf("\t\tbackup_num_devices:\t%llu\n",
 186                                         btrfs_backup_num_devices(backup));
 187         putchar('\n');
 188 }
 189
 190 static void print_backup_roots(struct btrfs_super_block *sb)
 191 {
 192         struct btrfs_root_backup *backup;
 193         int i;
 194
 195         for (i = 0; i < BTRFS_NUM_BACKUP_ROOTS; i++) {
 196                 backup = sb->super_roots + i;
 197                 if (!empty_backup(backup)) {
 198                         printf("\tbackup %d:\n", i);
 199                         print_root_backup(backup);
 200                 }
 201         }
 202 }
 203
 204 struct readable_flag_entry {
 205         u64 bit;
 206         char *output;
 207 };
 208
 209 #define DEF_COMPAT_RO_FLAG_ENTRY(bit_name)              \
 210         {BTRFS_FEATURE_COMPAT_RO_##bit_name, #bit_name}
 211
 212 static struct readable_flag_entry compat_ro_flags_array[] = {
 213         DEF_COMPAT_RO_FLAG_ENTRY(FREE_SPACE_TREE),
 214         DEF_COMPAT_RO_FLAG_ENTRY(FREE_SPACE_TREE_VALID),
 215 };
 216 static const int compat_ro_flags_num = sizeof(compat_ro_flags_array) /
 217                                        sizeof(struct readable_flag_entry);
 218
 219 #define DEF_INCOMPAT_FLAG_ENTRY(bit_name)               \
 220         {BTRFS_FEATURE_INCOMPAT_##bit_name, #bit_name}
 221
 222 static struct readable_flag_entry incompat_flags_array[] = {
 223         DEF_INCOMPAT_FLAG_ENTRY(MIXED_BACKREF),
 224         DEF_INCOMPAT_FLAG_ENTRY(DEFAULT_SUBVOL),
 225         DEF_INCOMPAT_FLAG_ENTRY(MIXED_GROUPS),
 226         DEF_INCOMPAT_FLAG_ENTRY(COMPRESS_LZO),
 227         DEF_INCOMPAT_FLAG_ENTRY(COMPRESS_LZOv2),
 228         DEF_INCOMPAT_FLAG_ENTRY(BIG_METADATA),
 229         DEF_INCOMPAT_FLAG_ENTRY(EXTENDED_IREF),
 230         DEF_INCOMPAT_FLAG_ENTRY(RAID56),
 231         DEF_INCOMPAT_FLAG_ENTRY(SKINNY_METADATA),
 232         DEF_INCOMPAT_FLAG_ENTRY(NO_HOLES)
 233 };
 234 static const int incompat_flags_num = sizeof(incompat_flags_array) /
 235                                       sizeof(struct readable_flag_entry);
 236
 237 #define DEF_HEADER_FLAG_ENTRY(bit_name)                 \
 238         {BTRFS_HEADER_FLAG_##bit_name, #bit_name}
 239 #define DEF_SUPER_FLAG_ENTRY(bit_name)                  \
 240         {BTRFS_SUPER_FLAG_##bit_name, #bit_name}
 241
 242 static struct readable_flag_entry super_flags_array[] = {
 243         DEF_HEADER_FLAG_ENTRY(WRITTEN),
 244         DEF_HEADER_FLAG_ENTRY(RELOC),
 245         DEF_SUPER_FLAG_ENTRY(CHANGING_FSID),
 246         DEF_SUPER_FLAG_ENTRY(SEEDING),
 247         DEF_SUPER_FLAG_ENTRY(METADUMP),
 248         DEF_SUPER_FLAG_ENTRY(METADUMP_V2)
 249 };
 250 static const int super_flags_num = ARRAY_SIZE(super_flags_array);
 251
 252 #define BTRFS_SUPER_FLAG_SUPP   (BTRFS_HEADER_FLAG_WRITTEN |\
 253                                  BTRFS_HEADER_FLAG_RELOC |\
 254                                  BTRFS_SUPER_FLAG_CHANGING_FSID |\
 255                                  BTRFS_SUPER_FLAG_SEEDING |\
 256                                  BTRFS_SUPER_FLAG_METADUMP |\
 257                                  BTRFS_SUPER_FLAG_METADUMP_V2)
 258
 259 static void __print_readable_flag(u64 flag, struct readable_flag_entry *array,
 260                                   int array_size, u64 supported_flags)
 261 {
 262         int i;
 263         int first = 1;
 264         struct readable_flag_entry *entry;
 265
 266         if (!flag)
 267                 return;
 268
 269         printf("\t\t\t( ");
 270         for (i = 0; i < array_size; i++) {
 271                 entry = array + i;
 272                 if (flag & entry->bit) {
 273                         if (first)
 274                                 printf("%s ", entry->output);
 275                         else
 276                                 printf("|\n\t\t\t  %s ", entry->output);
 277                         first = 0;
 278                 }
 279         }
 280         flag &= ~supported_flags;
 281         if (flag) {
 282                 if (first)
 283                         printf("unknown flag: 0x%llx ", flag);
 284                 else
 285                         printf("|\n\t\t\t  unknown flag: 0x%llx ", flag);
 286         }
 287         printf(")\n");
 288 }
 289
 290 static void print_readable_compat_ro_flag(u64 flag)
 291 {
 292         /*
 293          * We know about the FREE_SPACE_TREE{,_VALID} bits, but we don't
 294          * actually support them yet.
 295          */
 296         return __print_readable_flag(flag, compat_ro_flags_array,
 297                                      compat_ro_flags_num,
 298                                      BTRFS_FEATURE_COMPAT_RO_SUPP |
 299                                      BTRFS_FEATURE_COMPAT_RO_FREE_SPACE_TREE |
 300                                      BTRFS_FEATURE_COMPAT_RO_FREE_SPACE_TREE_VALID);
 301 }
 302
 303 static void print_readable_incompat_flag(u64 flag)
 304 {
 305         return __print_readable_flag(flag, incompat_flags_array,
 306                                      incompat_flags_num,
 307                                      BTRFS_FEATURE_INCOMPAT_SUPP);
 308 }
 309
 310 static void print_readable_super_flag(u64 flag)
 311 {
 312         return __print_readable_flag(flag, super_flags_array,
 313                                      super_flags_num, BTRFS_SUPER_FLAG_SUPP);
 314 }
 315
 316 static void dump_superblock(struct btrfs_super_block *sb, int full)
 317 {
 318         int i;
 319         char *s, buf[BTRFS_UUID_UNPARSED_SIZE];
 320         u8 *p;
 321         u32 csum_size;
 322         u16 csum_type;
 323
 324         csum_type = btrfs_super_csum_type(sb);
 325         csum_size = BTRFS_CSUM_SIZE;
 326         printf("csum_type\t\t%hu (", csum_type);
 327         if (csum_type >= ARRAY_SIZE(btrfs_csum_sizes)) {
 328                 printf("INVALID");
 329         } else {
 330                 if (csum_type == BTRFS_CSUM_TYPE_CRC32) {
 331                         printf("crc32c");
 332                         csum_size = btrfs_csum_sizes[csum_type];
 333                 } else {
 334                         printf("unknown");
 335                 }
 336         }
 337         printf(")\n");
 338         printf("csum_size\t\t%llu\n", (unsigned long long)csum_size);
 339
 340         printf("csum\t\t\t0x");
 341         for (i = 0, p = sb->csum; i < csum_size; i++)
 342                 printf("%02x", p[i]);
 343         if (check_csum_sblock(sb, csum_size))
 344                 printf(" [match]");
 345         else
 346                 printf(" [DON'T MATCH]");
 347         putchar('\n');
 348
 349         printf("bytenr\t\t\t%llu\n",
 350                 (unsigned long long)btrfs_super_bytenr(sb));
 351         printf("flags\t\t\t0x%llx\n",
 352                 (unsigned long long)btrfs_super_flags(sb));
 353         print_readable_super_flag(btrfs_super_flags(sb));
 354
 355         printf("magic\t\t\t");
 356         s = (char *) &sb->magic;
 357         for (i = 0; i < 8; i++)
 358                 putchar(isprint(s[i]) ? s[i] : '.');
 359         if (btrfs_super_magic(sb) == BTRFS_MAGIC)
 360                 printf(" [match]\n");
 361         else
 362                 printf(" [DON'T MATCH]\n");
 363
 364         uuid_unparse(sb->fsid, buf);
 365         printf("fsid\t\t\t%s\n", buf);
 366
 367         printf("label\t\t\t");
 368         s = sb->label;
 369         for (i = 0; i < BTRFS_LABEL_SIZE && s[i]; i++)
 370                 putchar(isprint(s[i]) ? s[i] : '.');
 371         putchar('\n');
 372
 373         printf("generation\t\t%llu\n",
 374                (unsigned long long)btrfs_super_generation(sb));
 375         printf("root\t\t\t%llu\n", (unsigned long long)btrfs_super_root(sb));
 376         printf("sys_array_size\t\t%llu\n",
 377                (unsigned long long)btrfs_super_sys_array_size(sb));
 378         printf("chunk_root_generation\t%llu\n",
 379                (unsigned long long)btrfs_super_chunk_root_generation(sb));
 380         printf("root_level\t\t%llu\n",
 381                (unsigned long long)btrfs_super_root_level(sb));
 382         printf("chunk_root\t\t%llu\n",
 383                (unsigned long long)btrfs_super_chunk_root(sb));
 384         printf("chunk_root_level\t%llu\n",
 385                (unsigned long long)btrfs_super_chunk_root_level(sb));
 386         printf("log_root\t\t%llu\n",
 387                (unsigned long long)btrfs_super_log_root(sb));
 388         printf("log_root_transid\t%llu\n",
 389                (unsigned long long)btrfs_super_log_root_transid(sb));
 390         printf("log_root_level\t\t%llu\n",
 391                (unsigned long long)btrfs_super_log_root_level(sb));
 392         printf("total_bytes\t\t%llu\n",
 393                (unsigned long long)btrfs_super_total_bytes(sb));
 394         printf("bytes_used\t\t%llu\n",
 395                (unsigned long long)btrfs_super_bytes_used(sb));
 396         printf("sectorsize\t\t%llu\n",
 397                (unsigned long long)btrfs_super_sectorsize(sb));
 398         printf("nodesize\t\t%llu\n",
 399                (unsigned long long)btrfs_super_nodesize(sb));
 400         printf("leafsize\t\t%llu\n",
 401                (unsigned long long)btrfs_super_leafsize(sb));
 402         printf("stripesize\t\t%llu\n",
 403                (unsigned long long)btrfs_super_stripesize(sb));
 404         printf("root_dir\t\t%llu\n",
 405                (unsigned long long)btrfs_super_root_dir(sb));
 406         printf("num_devices\t\t%llu\n",
 407                (unsigned long long)btrfs_super_num_devices(sb));
 408         printf("compat_flags\t\t0x%llx\n",
 409                (unsigned long long)btrfs_super_compat_flags(sb));
 410         printf("compat_ro_flags\t\t0x%llx\n",
 411                (unsigned long long)btrfs_super_compat_ro_flags(sb));
 412         print_readable_compat_ro_flag(btrfs_super_compat_ro_flags(sb));
 413         printf("incompat_flags\t\t0x%llx\n",
 414                (unsigned long long)btrfs_super_incompat_flags(sb));
 415         print_readable_incompat_flag(btrfs_super_incompat_flags(sb));
 416         printf("cache_generation\t%llu\n",
 417                (unsigned long long)btrfs_super_cache_generation(sb));
 418         printf("uuid_tree_generation\t%llu\n",
 419                (unsigned long long)btrfs_super_uuid_tree_generation(sb));
 420
 421         uuid_unparse(sb->dev_item.uuid, buf);
 422         printf("dev_item.uuid\t\t%s\n", buf);
 423
 424         uuid_unparse(sb->dev_item.fsid, buf);
 425         printf("dev_item.fsid\t\t%s %s\n", buf,
 426                 !memcmp(sb->dev_item.fsid, sb->fsid, BTRFS_FSID_SIZE) ?
 427                         "[match]" : "[DON'T MATCH]");
 428
 429         printf("dev_item.type\t\t%llu\n", (unsigned long long)
 430                btrfs_stack_device_type(&sb->dev_item));
 431         printf("dev_item.total_bytes\t%llu\n", (unsigned long long)
 432                btrfs_stack_device_total_bytes(&sb->dev_item));
 433         printf("dev_item.bytes_used\t%llu\n", (unsigned long long)
 434                btrfs_stack_device_bytes_used(&sb->dev_item));
 435         printf("dev_item.io_align\t%u\n", (unsigned int)
 436                btrfs_stack_device_io_align(&sb->dev_item));
 437         printf("dev_item.io_width\t%u\n", (unsigned int)
 438                btrfs_stack_device_io_width(&sb->dev_item));
 439         printf("dev_item.sector_size\t%u\n", (unsigned int)
 440                btrfs_stack_device_sector_size(&sb->dev_item));
 441         printf("dev_item.devid\t\t%llu\n",
 442                btrfs_stack_device_id(&sb->dev_item));
 443         printf("dev_item.dev_group\t%u\n", (unsigned int)
 444                btrfs_stack_device_group(&sb->dev_item));
 445         printf("dev_item.seek_speed\t%u\n", (unsigned int)
 446                btrfs_stack_device_seek_speed(&sb->dev_item));
 447         printf("dev_item.bandwidth\t%u\n", (unsigned int)
 448                btrfs_stack_device_bandwidth(&sb->dev_item));
 449         printf("dev_item.generation\t%llu\n", (unsigned long long)
 450                btrfs_stack_device_generation(&sb->dev_item));
 451         if (full) {
 452                 printf("sys_chunk_array[%d]:\n", BTRFS_SYSTEM_CHUNK_ARRAY_SIZE);
 453                 print_sys_chunk_array(sb);
 454                 printf("backup_roots[%d]:\n", BTRFS_NUM_BACKUP_ROOTS);
 455                 print_backup_roots(sb);
 456         }
 457 }
 458
 459 static int load_and_dump_sb(char *filename, int fd, u64 sb_bytenr, int full,
 460                 int force)
 461 {
 462         u8 super_block_data[BTRFS_SUPER_INFO_SIZE];
 463         struct btrfs_super_block *sb;
 464         u64 ret;
 465
 466         sb = (struct btrfs_super_block *)super_block_data;
 467
 468         ret = pread64(fd, super_block_data, BTRFS_SUPER_INFO_SIZE, sb_bytenr);
 469         if (ret != BTRFS_SUPER_INFO_SIZE) {
 470                 /* check if the disk if too short for further superblock */
 471                 if (ret == 0 && errno == 0)
 472                         return 0;
 473
 474                 error("failed to read the superblock on %s at %llu",
 475                                 filename, (unsigned long long)sb_bytenr);
 476                 error("error = '%s', errno = %d", strerror(errno), errno);
 477                 return 1;
 478         }
 479         printf("superblock: bytenr=%llu, device=%s\n", sb_bytenr, filename);
 480         printf("---------------------------------------------------------\n");
 481         if (btrfs_super_magic(sb) != BTRFS_MAGIC && !force) {
 482                 error("bad magic on superblock on %s at %llu",
 483                                 filename, (unsigned long long)sb_bytenr);
 484         } else {
 485                 dump_superblock(sb, full);
 486         }
 487         return 0;
 488 }
 489
 490 const char * const cmd_inspect_dump_super_usage[] = {
 491         "btrfs inspect-internal dump-super [options] device [device...]",
 492         "Dump superblock from a device in a textual form",
 493         "-f|--full             print full superblock information, backup roots etc.",
 494         "-a|--all              print information about all superblocks",
 495         "-s|--super <super>    specify which copy to print out (values: 0, 1, 2)",
 496         "-F|--force            attempt to dump superblocks with bad magic",
 497         "--bytenr <offset>     specify alternate superblock offset",
 498         "",
 499         "Deprecated syntax:",
 500         "-s <bytenr>           specify alternate superblock offset, values other than 0, 1, 2",
 501         "                      will be interpreted as --bytenr for backward compatibility,",
 502         "                      option renamed for consistency with other tools (eg. check)",
 503         "-i <super>            specify which copy to print out (values: 0, 1, 2), now moved",
 504         "                      to -s|--super",
 505         NULL
 506 };
 507
 508 int cmd_inspect_dump_super(int argc, char **argv)
 509 {
 510         int all = 0;
 511         int full = 0;
 512         int force = 0;
 513         char *filename;
 514         int fd = -1;
 515         int i;
 516         int ret = 0;
 517         u64 arg;
 518         u64 sb_bytenr = btrfs_sb_offset(0);
 519
 520         while (1) {
 521                 int c;
 522                 static const struct option long_options[] = {
 523                         {"all", no_argument, NULL, 'a'},
 524                         {"full", no_argument, NULL, 'f'},
 525                         {"force", no_argument, NULL, 'F'},
 526                         {"super", required_argument, NULL, 's' },
 527                         {NULL, 0, NULL, 0}
 528                 };
 529
 530                 c = getopt_long(argc, argv, "fFai:s:", long_options, NULL);
 531                 if (c < 0)
 532                         break;
 533
 534                 switch (c) {
 535                 case 'i':
 536                         warning(
 537                             "option -i is deprecated, please use -s or --super");
 538                         arg = arg_strtou64(optarg);
 539                         if (arg >= BTRFS_SUPER_MIRROR_MAX) {
 540                                 error("super mirror too big: %llu >= %d",
 541                                         arg, BTRFS_SUPER_MIRROR_MAX);
 542                                 return 1;
 543                         }
 544                         sb_bytenr = btrfs_sb_offset(arg);
 545                         break;
 546
 547                 case 'a':
 548                         all = 1;
 549                         break;
 550                 case 'f':
 551                         full = 1;
 552                         break;
 553                 case 'F':
 554                         force = 1;
 555                         break;
 556                 case 's':
 557                         arg = arg_strtou64(optarg);
 558                         if (BTRFS_SUPER_MIRROR_MAX <= arg) {
 559                                 warning(
 560                 "deprecated use of -s <bytenr> with %llu, assuming --bytenr",
 561                                                 (unsigned long long)arg);
 562                                 sb_bytenr = arg;
 563                         } else {
 564                                 sb_bytenr = btrfs_sb_offset(arg);
 565                         }
 566                         all = 0;
 567                         break;
 568                 default:
 569                         usage(cmd_inspect_dump_super_usage);
 570                 }
 571         }
 572
 573         if (check_argc_min(argc - optind, 1))
 574                 usage(cmd_inspect_dump_super_usage);
 575
 576         for (i = optind; i < argc; i++) {
 577                 filename = argv[i];
 578                 fd = open(filename, O_RDONLY);
 579                 if (fd < 0) {
 580                         error("cannot open %s: %s", filename, strerror(errno));
 581                         ret = 1;
 582                         goto out;
 583                 }
 584
 585                 if (all) {
 586                         int idx;
 587
 588                         for (idx = 0; idx < BTRFS_SUPER_MIRROR_MAX; idx++) {
 589                                 sb_bytenr = btrfs_sb_offset(idx);
 590                                 if (load_and_dump_sb(filename, fd,
 591                                                 sb_bytenr, full, force)) {
 592                                         close(fd);
 593                                         ret = 1;
 594                                         goto out;
 595                                 }
 596
 597                                 putchar('\n');
 598                         }
 599                 } else {
 600                         load_and_dump_sb(filename, fd, sb_bytenr, full, force);
 601                         putchar('\n');
 602                 }
 603                 close(fd);
 604         }
 605
 606 out:
 607         return ret;
 608 }