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