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 "help.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((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                 return;
  68         }
  69         write_extent_buffer(buf, sb, 0, sizeof(*sb));
  70         buf->len = 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
  76         if (array_size > BTRFS_SYSTEM_CHUNK_ARRAY_SIZE) {
  77                 error("sys_array_size %u shouldn't exceed %u bytes",
  78                                 array_size, BTRFS_SYSTEM_CHUNK_ARRAY_SIZE);
  79                 goto out;
  80         }
  81
  82         cur_offset = 0;
  83         item = 0;
  84
  85         while (cur_offset < array_size) {
  86                 disk_key = (struct btrfs_disk_key *)array_ptr;
  87                 len = sizeof(*disk_key);
  88                 if (cur_offset + len > array_size)
  89                         goto out_short_read;
  90
  91                 btrfs_disk_key_to_cpu(&key, disk_key);
  92
  93                 array_ptr += len;
  94                 sb_array_offset += len;
  95                 cur_offset += len;
  96
  97                 printf("\titem %d ", item);
  98                 btrfs_print_key(disk_key);
  99                 putchar('\n');
 100
 101                 if (key.type == BTRFS_CHUNK_ITEM_KEY) {
 102                         chunk = (struct btrfs_chunk *)sb_array_offset;
 103                         /*
 104                          * At least one btrfs_chunk with one stripe must be
 105                          * present, exact stripe count check comes afterwards
 106                          */
 107                         len = btrfs_chunk_item_size(1);
 108                         if (cur_offset + len > array_size)
 109                                 goto out_short_read;
 110
 111                         num_stripes = btrfs_chunk_num_stripes(buf, chunk);
 112                         if (!num_stripes) {
 113                                 error(
 114                         "invalid number of stripes %u in sys_array at offset %u",
 115                                         num_stripes, cur_offset);
 116                                 break;
 117                         }
 118                         len = btrfs_chunk_item_size(num_stripes);
 119                         if (cur_offset + len > array_size)
 120                                 goto out_short_read;
 121                         print_chunk_item(buf, chunk);
 122                 } else {
 123                         error("unexpected item type %u in sys_array at offset %u",
 124                                 (u32)key.type, cur_offset);
 125                         break;
 126                 }
 127                 array_ptr += len;
 128                 sb_array_offset += len;
 129                 cur_offset += len;
 130
 131                 item++;
 132         }
 133
 134 out:
 135         free(buf);
 136         return;
 137
 138 out_short_read:
 139         error("sys_array too short to read %u bytes at offset %u",
 140                         len, cur_offset);
 141         free(buf);
 142 }
 143
 144 static int empty_backup(struct btrfs_root_backup *backup)
 145 {
 146         if (backup == NULL ||
 147                 (backup->tree_root == 0 &&
 148                  backup->tree_root_gen == 0))
 149                 return 1;
 150         return 0;
 151 }
 152
 153 static void print_root_backup(struct btrfs_root_backup *backup)
 154 {
 155         printf("\t\tbackup_tree_root:\t%llu\tgen: %llu\tlevel: %d\n",
 156                         btrfs_backup_tree_root(backup),
 157                         btrfs_backup_tree_root_gen(backup),
 158                         btrfs_backup_tree_root_level(backup));
 159         printf("\t\tbackup_chunk_root:\t%llu\tgen: %llu\tlevel: %d\n",
 160                         btrfs_backup_chunk_root(backup),
 161                         btrfs_backup_chunk_root_gen(backup),
 162                         btrfs_backup_chunk_root_level(backup));
 163         printf("\t\tbackup_extent_root:\t%llu\tgen: %llu\tlevel: %d\n",
 164                         btrfs_backup_extent_root(backup),
 165                         btrfs_backup_extent_root_gen(backup),
 166                         btrfs_backup_extent_root_level(backup));
 167         printf("\t\tbackup_fs_root:\t\t%llu\tgen: %llu\tlevel: %d\n",
 168                         btrfs_backup_fs_root(backup),
 169                         btrfs_backup_fs_root_gen(backup),
 170                         btrfs_backup_fs_root_level(backup));
 171         printf("\t\tbackup_dev_root:\t%llu\tgen: %llu\tlevel: %d\n",
 172                         btrfs_backup_dev_root(backup),
 173                         btrfs_backup_dev_root_gen(backup),
 174                         btrfs_backup_dev_root_level(backup));
 175         printf("\t\tbackup_csum_root:\t%llu\tgen: %llu\tlevel: %d\n",
 176                         btrfs_backup_csum_root(backup),
 177                         btrfs_backup_csum_root_gen(backup),
 178                         btrfs_backup_csum_root_level(backup));
 179
 180         printf("\t\tbackup_total_bytes:\t%llu\n",
 181                                         btrfs_backup_total_bytes(backup));
 182         printf("\t\tbackup_bytes_used:\t%llu\n",
 183                                         btrfs_backup_bytes_used(backup));
 184         printf("\t\tbackup_num_devices:\t%llu\n",
 185                                         btrfs_backup_num_devices(backup));
 186         putchar('\n');
 187 }
 188
 189 static void print_backup_roots(struct btrfs_super_block *sb)
 190 {
 191         struct btrfs_root_backup *backup;
 192         int i;
 193
 194         for (i = 0; i < BTRFS_NUM_BACKUP_ROOTS; i++) {
 195                 backup = sb->super_roots + i;
 196                 if (!empty_backup(backup)) {
 197                         printf("\tbackup %d:\n", i);
 198                         print_root_backup(backup);
 199                 }
 200         }
 201 }
 202
 203 struct readable_flag_entry {
 204         u64 bit;
 205         char *output;
 206 };
 207
 208 #define DEF_COMPAT_RO_FLAG_ENTRY(bit_name)              \
 209         {BTRFS_FEATURE_COMPAT_RO_##bit_name, #bit_name}
 210
 211 static struct readable_flag_entry compat_ro_flags_array[] = {
 212         DEF_COMPAT_RO_FLAG_ENTRY(FREE_SPACE_TREE),
 213         DEF_COMPAT_RO_FLAG_ENTRY(FREE_SPACE_TREE_VALID),
 214 };
 215 static const int compat_ro_flags_num = sizeof(compat_ro_flags_array) /
 216                                        sizeof(struct readable_flag_entry);
 217
 218 #define DEF_INCOMPAT_FLAG_ENTRY(bit_name)               \
 219         {BTRFS_FEATURE_INCOMPAT_##bit_name, #bit_name}
 220
 221 static struct readable_flag_entry incompat_flags_array[] = {
 222         DEF_INCOMPAT_FLAG_ENTRY(MIXED_BACKREF),
 223         DEF_INCOMPAT_FLAG_ENTRY(DEFAULT_SUBVOL),
 224         DEF_INCOMPAT_FLAG_ENTRY(MIXED_GROUPS),
 225         DEF_INCOMPAT_FLAG_ENTRY(COMPRESS_LZO),
 226         DEF_INCOMPAT_FLAG_ENTRY(COMPRESS_ZSTD),
 227         DEF_INCOMPAT_FLAG_ENTRY(BIG_METADATA),
 228         DEF_INCOMPAT_FLAG_ENTRY(EXTENDED_IREF),
 229         DEF_INCOMPAT_FLAG_ENTRY(RAID56),
 230         DEF_INCOMPAT_FLAG_ENTRY(SKINNY_METADATA),
 231         DEF_INCOMPAT_FLAG_ENTRY(NO_HOLES)
 232 };
 233 static const int incompat_flags_num = sizeof(incompat_flags_array) /
 234                                       sizeof(struct readable_flag_entry);
 235
 236 #define DEF_HEADER_FLAG_ENTRY(bit_name)                 \
 237         {BTRFS_HEADER_FLAG_##bit_name, #bit_name}
 238 #define DEF_SUPER_FLAG_ENTRY(bit_name)                  \
 239         {BTRFS_SUPER_FLAG_##bit_name, #bit_name}
 240
 241 static struct readable_flag_entry super_flags_array[] = {
 242         DEF_HEADER_FLAG_ENTRY(WRITTEN),
 243         DEF_HEADER_FLAG_ENTRY(RELOC),
 244         DEF_SUPER_FLAG_ENTRY(CHANGING_FSID),
 245         DEF_SUPER_FLAG_ENTRY(SEEDING),
 246         DEF_SUPER_FLAG_ENTRY(METADUMP),
 247         DEF_SUPER_FLAG_ENTRY(METADUMP_V2)
 248 };
 249 static const int super_flags_num = ARRAY_SIZE(super_flags_array);
 250
 251 #define BTRFS_SUPER_FLAG_SUPP   (BTRFS_HEADER_FLAG_WRITTEN |\
 252                                  BTRFS_HEADER_FLAG_RELOC |\
 253                                  BTRFS_SUPER_FLAG_CHANGING_FSID |\
 254                                  BTRFS_SUPER_FLAG_SEEDING |\
 255                                  BTRFS_SUPER_FLAG_METADUMP |\
 256                                  BTRFS_SUPER_FLAG_METADUMP_V2)
 257
 258 static void __print_readable_flag(u64 flag, struct readable_flag_entry *array,
 259                                   int array_size, u64 supported_flags)
 260 {
 261         int i;
 262         int first = 1;
 263         struct readable_flag_entry *entry;
 264
 265         if (!flag)
 266                 return;
 267
 268         printf("\t\t\t( ");
 269         for (i = 0; i < array_size; i++) {
 270                 entry = array + i;
 271                 if (flag & entry->bit) {
 272                         if (first)
 273                                 printf("%s ", entry->output);
 274                         else
 275                                 printf("|\n\t\t\t  %s ", entry->output);
 276                         first = 0;
 277                 }
 278         }
 279         flag &= ~supported_flags;
 280         if (flag) {
 281                 if (first)
 282                         printf("unknown flag: 0x%llx ", flag);
 283                 else
 284                         printf("|\n\t\t\t  unknown flag: 0x%llx ", flag);
 285         }
 286         printf(")\n");
 287 }
 288
 289 static void print_readable_compat_ro_flag(u64 flag)
 290 {
 291         /*
 292          * We know about the FREE_SPACE_TREE{,_VALID} bits, but we don't
 293          * actually support them yet.
 294          */
 295         return __print_readable_flag(flag, compat_ro_flags_array,
 296                                      compat_ro_flags_num,
 297                                      BTRFS_FEATURE_COMPAT_RO_SUPP |
 298                                      BTRFS_FEATURE_COMPAT_RO_FREE_SPACE_TREE |
 299                                      BTRFS_FEATURE_COMPAT_RO_FREE_SPACE_TREE_VALID);
 300 }
 301
 302 static void print_readable_incompat_flag(u64 flag)
 303 {
 304         return __print_readable_flag(flag, incompat_flags_array,
 305                                      incompat_flags_num,
 306                                      BTRFS_FEATURE_INCOMPAT_SUPP);
 307 }
 308
 309 static void print_readable_super_flag(u64 flag)
 310 {
 311         return __print_readable_flag(flag, super_flags_array,
 312                                      super_flags_num, BTRFS_SUPER_FLAG_SUPP);
 313 }
 314
 315 static void dump_superblock(struct btrfs_super_block *sb, int full)
 316 {
 317         int i;
 318         char *s, buf[BTRFS_UUID_UNPARSED_SIZE];
 319         u8 *p;
 320         u32 csum_size;
 321         u16 csum_type;
 322
 323         csum_type = btrfs_super_csum_type(sb);
 324         csum_size = BTRFS_CSUM_SIZE;
 325         printf("csum_type\t\t%hu (", csum_type);
 326         if (csum_type >= ARRAY_SIZE(btrfs_csum_sizes)) {
 327                 printf("INVALID");
 328         } else {
 329                 if (csum_type == BTRFS_CSUM_TYPE_CRC32) {
 330                         printf("crc32c");
 331                         csum_size = btrfs_csum_sizes[csum_type];
 332                 } else {
 333                         printf("unknown");
 334                 }
 335         }
 336         printf(")\n");
 337         printf("csum_size\t\t%llu\n", (unsigned long long)csum_size);
 338
 339         printf("csum\t\t\t0x");
 340         for (i = 0, p = sb->csum; i < csum_size; i++)
 341                 printf("%02x", p[i]);
 342         if (csum_type != BTRFS_CSUM_TYPE_CRC32 ||
 343             csum_size != btrfs_csum_sizes[BTRFS_CSUM_TYPE_CRC32])
 344                 printf(" [UNKNOWN CSUM TYPE OR SIZE]");
 345         else if (check_csum_sblock(sb, csum_size))
 346                 printf(" [match]");
 347         else
 348                 printf(" [DON'T MATCH]");
 349         putchar('\n');
 350
 351         printf("bytenr\t\t\t%llu\n",
 352                 (unsigned long long)btrfs_super_bytenr(sb));
 353         printf("flags\t\t\t0x%llx\n",
 354                 (unsigned long long)btrfs_super_flags(sb));
 355         print_readable_super_flag(btrfs_super_flags(sb));
 356
 357         printf("magic\t\t\t");
 358         s = (char *) &sb->magic;
 359         for (i = 0; i < 8; i++)
 360                 putchar(isprint(s[i]) ? s[i] : '.');
 361         if (btrfs_super_magic(sb) == BTRFS_MAGIC)
 362                 printf(" [match]\n");
 363         else
 364                 printf(" [DON'T MATCH]\n");
 365
 366         uuid_unparse(sb->fsid, buf);
 367         printf("fsid\t\t\t%s\n", buf);
 368
 369         printf("label\t\t\t");
 370         s = sb->label;
 371         for (i = 0; i < BTRFS_LABEL_SIZE && s[i]; i++)
 372                 putchar(isprint(s[i]) ? s[i] : '.');
 373         putchar('\n');
 374
 375         printf("generation\t\t%llu\n",
 376                (unsigned long long)btrfs_super_generation(sb));
 377         printf("root\t\t\t%llu\n", (unsigned long long)btrfs_super_root(sb));
 378         printf("sys_array_size\t\t%llu\n",
 379                (unsigned long long)btrfs_super_sys_array_size(sb));
 380         printf("chunk_root_generation\t%llu\n",
 381                (unsigned long long)btrfs_super_chunk_root_generation(sb));
 382         printf("root_level\t\t%llu\n",
 383                (unsigned long long)btrfs_super_root_level(sb));
 384         printf("chunk_root\t\t%llu\n",
 385                (unsigned long long)btrfs_super_chunk_root(sb));
 386         printf("chunk_root_level\t%llu\n",
 387                (unsigned long long)btrfs_super_chunk_root_level(sb));
 388         printf("log_root\t\t%llu\n",
 389                (unsigned long long)btrfs_super_log_root(sb));
 390         printf("log_root_transid\t%llu\n",
 391                (unsigned long long)btrfs_super_log_root_transid(sb));
 392         printf("log_root_level\t\t%llu\n",
 393                (unsigned long long)btrfs_super_log_root_level(sb));
 394         printf("total_bytes\t\t%llu\n",
 395                (unsigned long long)btrfs_super_total_bytes(sb));
 396         printf("bytes_used\t\t%llu\n",
 397                (unsigned long long)btrfs_super_bytes_used(sb));
 398         printf("sectorsize\t\t%llu\n",
 399                (unsigned long long)btrfs_super_sectorsize(sb));
 400         printf("nodesize\t\t%llu\n",
 401                (unsigned long long)btrfs_super_nodesize(sb));
 402         printf("leafsize (deprecated)\t\t%u\n",
 403                le32_to_cpu(sb->__unused_leafsize));
 404         printf("stripesize\t\t%llu\n",
 405                (unsigned long long)btrfs_super_stripesize(sb));
 406         printf("root_dir\t\t%llu\n",
 407                (unsigned long long)btrfs_super_root_dir(sb));
 408         printf("num_devices\t\t%llu\n",
 409                (unsigned long long)btrfs_super_num_devices(sb));
 410         printf("compat_flags\t\t0x%llx\n",
 411                (unsigned long long)btrfs_super_compat_flags(sb));
 412         printf("compat_ro_flags\t\t0x%llx\n",
 413                (unsigned long long)btrfs_super_compat_ro_flags(sb));
 414         print_readable_compat_ro_flag(btrfs_super_compat_ro_flags(sb));
 415         printf("incompat_flags\t\t0x%llx\n",
 416                (unsigned long long)btrfs_super_incompat_flags(sb));
 417         print_readable_incompat_flag(btrfs_super_incompat_flags(sb));
 418         printf("cache_generation\t%llu\n",
 419                (unsigned long long)btrfs_super_cache_generation(sb));
 420         printf("uuid_tree_generation\t%llu\n",
 421                (unsigned long long)btrfs_super_uuid_tree_generation(sb));
 422
 423         uuid_unparse(sb->dev_item.uuid, buf);
 424         printf("dev_item.uuid\t\t%s\n", buf);
 425
 426         uuid_unparse(sb->dev_item.fsid, buf);
 427         printf("dev_item.fsid\t\t%s %s\n", buf,
 428                 !memcmp(sb->dev_item.fsid, sb->fsid, BTRFS_FSID_SIZE) ?
 429                         "[match]" : "[DON'T MATCH]");
 430
 431         printf("dev_item.type\t\t%llu\n", (unsigned long long)
 432                btrfs_stack_device_type(&sb->dev_item));
 433         printf("dev_item.total_bytes\t%llu\n", (unsigned long long)
 434                btrfs_stack_device_total_bytes(&sb->dev_item));
 435         printf("dev_item.bytes_used\t%llu\n", (unsigned long long)
 436                btrfs_stack_device_bytes_used(&sb->dev_item));
 437         printf("dev_item.io_align\t%u\n", (unsigned int)
 438                btrfs_stack_device_io_align(&sb->dev_item));
 439         printf("dev_item.io_width\t%u\n", (unsigned int)
 440                btrfs_stack_device_io_width(&sb->dev_item));
 441         printf("dev_item.sector_size\t%u\n", (unsigned int)
 442                btrfs_stack_device_sector_size(&sb->dev_item));
 443         printf("dev_item.devid\t\t%llu\n",
 444                btrfs_stack_device_id(&sb->dev_item));
 445         printf("dev_item.dev_group\t%u\n", (unsigned int)
 446                btrfs_stack_device_group(&sb->dev_item));
 447         printf("dev_item.seek_speed\t%u\n", (unsigned int)
 448                btrfs_stack_device_seek_speed(&sb->dev_item));
 449         printf("dev_item.bandwidth\t%u\n", (unsigned int)
 450                btrfs_stack_device_bandwidth(&sb->dev_item));
 451         printf("dev_item.generation\t%llu\n", (unsigned long long)
 452                btrfs_stack_device_generation(&sb->dev_item));
 453         if (full) {
 454                 printf("sys_chunk_array[%d]:\n", BTRFS_SYSTEM_CHUNK_ARRAY_SIZE);
 455                 print_sys_chunk_array(sb);
 456                 printf("backup_roots[%d]:\n", BTRFS_NUM_BACKUP_ROOTS);
 457                 print_backup_roots(sb);
 458         }
 459 }
 460
 461 static int load_and_dump_sb(char *filename, int fd, u64 sb_bytenr, int full,
 462                 int force)
 463 {
 464         u8 super_block_data[BTRFS_SUPER_INFO_SIZE];
 465         struct btrfs_super_block *sb;
 466         u64 ret;
 467
 468         sb = (struct btrfs_super_block *)super_block_data;
 469
 470         ret = pread64(fd, super_block_data, BTRFS_SUPER_INFO_SIZE, sb_bytenr);
 471         if (ret != BTRFS_SUPER_INFO_SIZE) {
 472                 /* check if the disk if too short for further superblock */
 473                 if (ret == 0 && errno == 0)
 474                         return 0;
 475
 476                 error("failed to read the superblock on %s at %llu",
 477                                 filename, (unsigned long long)sb_bytenr);
 478                 error("error = '%m', errno = %d", errno);
 479                 return 1;
 480         }
 481         printf("superblock: bytenr=%llu, device=%s\n", sb_bytenr, filename);
 482         printf("---------------------------------------------------------\n");
 483         if (btrfs_super_magic(sb) != BTRFS_MAGIC && !force) {
 484                 error("bad magic on superblock on %s at %llu",
 485                                 filename, (unsigned long long)sb_bytenr);
 486         } else {
 487                 dump_superblock(sb, full);
 488         }
 489         return 0;
 490 }
 491
 492 const char * const cmd_inspect_dump_super_usage[] = {
 493         "btrfs inspect-internal dump-super [options] device [device...]",
 494         "Dump superblock from a device in a textual form",
 495         "-f|--full             print full superblock information, backup roots etc.",
 496         "-a|--all              print information about all superblocks",
 497         "-s|--super <super>    specify which copy to print out (values: 0, 1, 2)",
 498         "-F|--force            attempt to dump superblocks with bad magic",
 499         "--bytenr <offset>     specify alternate superblock offset",
 500         "",
 501         "Deprecated syntax:",
 502         "-s <bytenr>           specify alternate superblock offset, values other than 0, 1, 2",
 503         "                      will be interpreted as --bytenr for backward compatibility,",
 504         "                      option renamed for consistency with other tools (eg. check)",
 505         "-i <super>            specify which copy to print out (values: 0, 1, 2), now moved",
 506         "                      to -s|--super",
 507         NULL
 508 };
 509
 510 int cmd_inspect_dump_super(int argc, char **argv)
 511 {
 512         int all = 0;
 513         int full = 0;
 514         int force = 0;
 515         char *filename;
 516         int fd = -1;
 517         int i;
 518         int ret = 0;
 519         u64 arg;
 520         u64 sb_bytenr = btrfs_sb_offset(0);
 521
 522         while (1) {
 523                 int c;
 524                 enum { GETOPT_VAL_BYTENR = 257 };
 525                 static const struct option long_options[] = {
 526                         {"all", no_argument, NULL, 'a'},
 527                         {"bytenr", required_argument, NULL, GETOPT_VAL_BYTENR },
 528                         {"full", no_argument, NULL, 'f'},
 529                         {"force", no_argument, NULL, 'F'},
 530                         {"super", required_argument, NULL, 's' },
 531                         {NULL, 0, NULL, 0}
 532                 };
 533
 534                 c = getopt_long(argc, argv, "fFai:s:", long_options, NULL);
 535                 if (c < 0)
 536                         break;
 537
 538                 switch (c) {
 539                 case 'i':
 540                         warning(
 541                             "option -i is deprecated, please use -s or --super");
 542                         arg = arg_strtou64(optarg);
 543                         if (arg >= BTRFS_SUPER_MIRROR_MAX) {
 544                                 error("super mirror too big: %llu >= %d",
 545                                         arg, BTRFS_SUPER_MIRROR_MAX);
 546                                 return 1;
 547                         }
 548                         sb_bytenr = btrfs_sb_offset(arg);
 549                         break;
 550
 551                 case 'a':
 552                         all = 1;
 553                         break;
 554                 case 'f':
 555                         full = 1;
 556                         break;
 557                 case 'F':
 558                         force = 1;
 559                         break;
 560                 case 's':
 561                         arg = arg_strtou64(optarg);
 562                         if (BTRFS_SUPER_MIRROR_MAX <= arg) {
 563                                 warning(
 564                 "deprecated use of -s <bytenr> with %llu, assuming --bytenr",
 565                                                 (unsigned long long)arg);
 566                                 sb_bytenr = arg;
 567                         } else {
 568                                 sb_bytenr = btrfs_sb_offset(arg);
 569                         }
 570                         all = 0;
 571                         break;
 572                 case GETOPT_VAL_BYTENR:
 573                         arg = arg_strtou64(optarg);
 574                         sb_bytenr = arg;
 575                         all = 0;
 576                         break;
 577                 default:
 578                         usage(cmd_inspect_dump_super_usage);
 579                 }
 580         }
 581
 582         if (check_argc_min(argc - optind, 1))
 583                 usage(cmd_inspect_dump_super_usage);
 584
 585         for (i = optind; i < argc; i++) {
 586                 filename = argv[i];
 587                 fd = open(filename, O_RDONLY);
 588                 if (fd < 0) {
 589                         error("cannot open %s: %m", filename);
 590                         ret = 1;
 591                         goto out;
 592                 }
 593
 594                 if (all) {
 595                         int idx;
 596
 597                         for (idx = 0; idx < BTRFS_SUPER_MIRROR_MAX; idx++) {
 598                                 sb_bytenr = btrfs_sb_offset(idx);
 599                                 if (load_and_dump_sb(filename, fd,
 600                                                 sb_bytenr, full, force)) {
 601                                         close(fd);
 602                                         ret = 1;
 603                                         goto out;
 604                                 }
 605
 606                                 putchar('\n');
 607                         }
 608                 } else {
 609                         load_and_dump_sb(filename, fd, sb_bytenr, full, force);
 610                         putchar('\n');
 611                 }
 612                 close(fd);
 613         }
 614
 615 out:
 616         return ret;
 617 }