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