| /* |
| * Copyright (C) 2012 STRATO AG. All rights reserved. |
| * |
| * This program is free software; you can redistribute it and/or |
| * modify it under the terms of the GNU General Public |
| * License v2 as published by the Free Software Foundation. |
| * |
| * This program is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| * General Public License for more details. |
| * |
| * You should have received a copy of the GNU General Public |
| * License along with this program; if not, write to the |
| * Free Software Foundation, Inc., 59 Temple Place - Suite 330, |
| * Boston, MA 021110-1307, USA. |
| */ |
| |
| #define _XOPEN_SOURCE 500 |
| #define _GNU_SOURCE 1 |
| #include <stdio.h> |
| #include <stdlib.h> |
| #include <unistd.h> |
| #include <fcntl.h> |
| #include <sys/stat.h> |
| #include <ctype.h> |
| #include <uuid/uuid.h> |
| #include <errno.h> |
| |
| #include "kerncompat.h" |
| #include "ctree.h" |
| #include "disk-io.h" |
| #include "print-tree.h" |
| #include "transaction.h" |
| #include "list.h" |
| #include "version.h" |
| #include "utils.h" |
| #include "crc32c.h" |
| |
| static void print_usage(void); |
| static void dump_superblock(struct btrfs_super_block *sb, int full); |
| int main(int argc, char **argv); |
| static int load_and_dump_sb(char *, int fd, u64 sb_bytenr, int full, int force); |
| |
| |
| static void print_usage(void) |
| { |
| fprintf(stderr, |
| "usage: btrfs-show-super [-i super_mirror|-a|-f|-F] dev [dev..]\n"); |
| fprintf(stderr, "\t-f : print full superblock information\n"); |
| fprintf(stderr, "\t-a : print information of all superblocks\n"); |
| fprintf(stderr, "\t-i <super_mirror> : specify which mirror to print out\n"); |
| fprintf(stderr, "\t-F : attempt to dump superblocks with bad magic\n"); |
| fprintf(stderr, "%s\n", BTRFS_BUILD_VERSION); |
| } |
| |
| int main(int argc, char **argv) |
| { |
| int opt; |
| int all = 0; |
| int full = 0; |
| int force = 0; |
| char *filename; |
| int fd = -1; |
| int i; |
| u64 arg; |
| u64 sb_bytenr = btrfs_sb_offset(0); |
| |
| while ((opt = getopt(argc, argv, "fFai:")) != -1) { |
| switch (opt) { |
| case 'i': |
| arg = arg_strtou64(optarg); |
| if (arg >= BTRFS_SUPER_MIRROR_MAX) { |
| fprintf(stderr, |
| "Illegal super_mirror %llu\n", |
| arg); |
| print_usage(); |
| exit(1); |
| } |
| sb_bytenr = btrfs_sb_offset(arg); |
| break; |
| |
| case 'a': |
| all = 1; |
| break; |
| case 'f': |
| full = 1; |
| break; |
| case 'F': |
| force = 1; |
| break; |
| default: |
| print_usage(); |
| exit(1); |
| } |
| } |
| |
| set_argv0(argv); |
| if (check_argc_min(argc - optind, 1)) { |
| print_usage(); |
| exit(1); |
| } |
| |
| for (i = optind; i < argc; i++) { |
| filename = argv[i]; |
| fd = open(filename, O_RDONLY, 0666); |
| if (fd < 0) { |
| fprintf(stderr, "Could not open %s\n", filename); |
| exit(1); |
| } |
| |
| if (all) { |
| int idx; |
| for (idx = 0; idx < BTRFS_SUPER_MIRROR_MAX; idx++) { |
| sb_bytenr = btrfs_sb_offset(idx); |
| if (load_and_dump_sb(filename, fd, |
| sb_bytenr, full, force)) { |
| close(fd); |
| exit(1); |
| } |
| |
| putchar('\n'); |
| } |
| } else { |
| load_and_dump_sb(filename, fd, sb_bytenr, full, force); |
| putchar('\n'); |
| } |
| close(fd); |
| } |
| |
| exit(0); |
| } |
| |
| static int load_and_dump_sb(char *filename, int fd, u64 sb_bytenr, int full, |
| int force) |
| { |
| u8 super_block_data[BTRFS_SUPER_INFO_SIZE]; |
| struct btrfs_super_block *sb; |
| u64 ret; |
| |
| sb = (struct btrfs_super_block *)super_block_data; |
| |
| ret = pread64(fd, super_block_data, BTRFS_SUPER_INFO_SIZE, sb_bytenr); |
| if (ret != BTRFS_SUPER_INFO_SIZE) { |
| int e = errno; |
| |
| /* check if the disk if too short for further superblock */ |
| if (ret == 0 && e == 0) |
| return 0; |
| |
| fprintf(stderr, |
| "ERROR: Failed to read the superblock on %s at %llu\n", |
| filename, (unsigned long long)sb_bytenr); |
| fprintf(stderr, |
| "ERROR: error = '%s', errno = %d\n", strerror(e), e); |
| return 1; |
| } |
| printf("superblock: bytenr=%llu, device=%s\n", sb_bytenr, filename); |
| printf("---------------------------------------------------------\n"); |
| if (btrfs_super_magic(sb) != BTRFS_MAGIC && !force) { |
| fprintf(stderr, |
| "ERROR: bad magic on superblock on %s at %llu\n", |
| filename, (unsigned long long)sb_bytenr); |
| } else { |
| dump_superblock(sb, full); |
| } |
| return 0; |
| } |
| |
| static int check_csum_sblock(void *sb, int csum_size) |
| { |
| char result[BTRFS_CSUM_SIZE]; |
| u32 crc = ~(u32)0; |
| |
| crc = btrfs_csum_data(NULL, (char *)sb + BTRFS_CSUM_SIZE, |
| crc, BTRFS_SUPER_INFO_SIZE - BTRFS_CSUM_SIZE); |
| btrfs_csum_final(crc, result); |
| |
| return !memcmp(sb, &result, csum_size); |
| } |
| |
| static void print_sys_chunk_array(struct btrfs_super_block *sb) |
| { |
| struct extent_buffer *buf; |
| struct btrfs_disk_key *disk_key; |
| struct btrfs_chunk *chunk; |
| struct btrfs_key key; |
| u8 *ptr, *array_end; |
| u32 num_stripes; |
| u32 len = 0; |
| int i = 0; |
| |
| buf = malloc(sizeof(*buf) + sizeof(*sb)); |
| if (!buf) { |
| fprintf(stderr, "%s\n", strerror(ENOMEM)); |
| exit(1); |
| } |
| write_extent_buffer(buf, sb, 0, sizeof(*sb)); |
| ptr = sb->sys_chunk_array; |
| array_end = ptr + btrfs_super_sys_array_size(sb); |
| |
| while (ptr < array_end) { |
| disk_key = (struct btrfs_disk_key *)ptr; |
| btrfs_disk_key_to_cpu(&key, disk_key); |
| |
| printf("\titem %d ", i); |
| btrfs_print_key(disk_key); |
| |
| len = sizeof(*disk_key); |
| putchar('\n'); |
| ptr += len; |
| |
| if (key.type == BTRFS_CHUNK_ITEM_KEY) { |
| chunk = (struct btrfs_chunk *)(ptr - (u8 *)sb); |
| print_chunk(buf, chunk); |
| num_stripes = btrfs_chunk_num_stripes(buf, chunk); |
| len = btrfs_chunk_item_size(num_stripes); |
| } else { |
| BUG(); |
| } |
| |
| ptr += len; |
| i++; |
| } |
| |
| free(buf); |
| } |
| |
| static int empty_backup(struct btrfs_root_backup *backup) |
| { |
| if (backup == NULL || |
| (backup->tree_root == 0 && |
| backup->tree_root_gen == 0)) |
| return 1; |
| return 0; |
| } |
| |
| static void print_root_backup(struct btrfs_root_backup *backup) |
| { |
| printf("\t\tbackup_tree_root:\t%llu\tgen: %llu\tlevel: %d\n", |
| btrfs_backup_tree_root(backup), |
| btrfs_backup_tree_root_gen(backup), |
| btrfs_backup_tree_root_level(backup)); |
| printf("\t\tbackup_chunk_root:\t%llu\tgen: %llu\tlevel: %d\n", |
| btrfs_backup_chunk_root(backup), |
| btrfs_backup_chunk_root_gen(backup), |
| btrfs_backup_chunk_root_level(backup)); |
| printf("\t\tbackup_extent_root:\t%llu\tgen: %llu\tlevel: %d\n", |
| btrfs_backup_extent_root(backup), |
| btrfs_backup_extent_root_gen(backup), |
| btrfs_backup_extent_root_level(backup)); |
| printf("\t\tbackup_fs_root:\t\t%llu\tgen: %llu\tlevel: %d\n", |
| btrfs_backup_fs_root(backup), |
| btrfs_backup_fs_root_gen(backup), |
| btrfs_backup_fs_root_level(backup)); |
| printf("\t\tbackup_dev_root:\t%llu\tgen: %llu\tlevel: %d\n", |
| btrfs_backup_dev_root(backup), |
| btrfs_backup_dev_root_gen(backup), |
| btrfs_backup_dev_root_level(backup)); |
| printf("\t\tbackup_csum_root:\t%llu\tgen: %llu\tlevel: %d\n", |
| btrfs_backup_csum_root(backup), |
| btrfs_backup_csum_root_gen(backup), |
| btrfs_backup_csum_root_level(backup)); |
| |
| printf("\t\tbackup_total_bytes:\t%llu\n", |
| btrfs_backup_total_bytes(backup)); |
| printf("\t\tbackup_bytes_used:\t%llu\n", |
| btrfs_backup_bytes_used(backup)); |
| printf("\t\tbackup_num_devices:\t%llu\n", |
| btrfs_backup_num_devices(backup)); |
| putchar('\n'); |
| } |
| |
| static void print_backup_roots(struct btrfs_super_block *sb) |
| { |
| struct btrfs_root_backup *backup; |
| int i; |
| |
| for (i = 0; i < BTRFS_NUM_BACKUP_ROOTS; i++) { |
| backup = sb->super_roots + i; |
| if (!empty_backup(backup)) { |
| printf("\tbackup %d:\n", i); |
| print_root_backup(backup); |
| } |
| } |
| } |
| |
| static void dump_superblock(struct btrfs_super_block *sb, int full) |
| { |
| int i; |
| char *s, buf[BTRFS_UUID_UNPARSED_SIZE]; |
| u8 *p; |
| |
| printf("csum\t\t\t0x"); |
| for (i = 0, p = sb->csum; i < btrfs_super_csum_size(sb); i++) |
| printf("%02x", p[i]); |
| if (check_csum_sblock(sb, btrfs_super_csum_size(sb))) |
| printf(" [match]"); |
| else |
| printf(" [DON'T MATCH]"); |
| putchar('\n'); |
| |
| printf("bytenr\t\t\t%llu\n", |
| (unsigned long long)btrfs_super_bytenr(sb)); |
| printf("flags\t\t\t0x%llx\n", |
| (unsigned long long)btrfs_super_flags(sb)); |
| |
| printf("magic\t\t\t"); |
| s = (char *) &sb->magic; |
| for (i = 0; i < 8; i++) |
| putchar(isprint(s[i]) ? s[i] : '.'); |
| if (btrfs_super_magic(sb) == BTRFS_MAGIC) |
| printf(" [match]\n"); |
| else |
| printf(" [DON'T MATCH]\n"); |
| |
| uuid_unparse(sb->fsid, buf); |
| printf("fsid\t\t\t%s\n", buf); |
| |
| printf("label\t\t\t"); |
| s = sb->label; |
| for (i = 0; i < BTRFS_LABEL_SIZE && s[i]; i++) |
| putchar(isprint(s[i]) ? s[i] : '.'); |
| putchar('\n'); |
| |
| printf("generation\t\t%llu\n", |
| (unsigned long long)btrfs_super_generation(sb)); |
| printf("root\t\t\t%llu\n", (unsigned long long)btrfs_super_root(sb)); |
| printf("sys_array_size\t\t%llu\n", |
| (unsigned long long)btrfs_super_sys_array_size(sb)); |
| printf("chunk_root_generation\t%llu\n", |
| (unsigned long long)btrfs_super_chunk_root_generation(sb)); |
| printf("root_level\t\t%llu\n", |
| (unsigned long long)btrfs_super_root_level(sb)); |
| printf("chunk_root\t\t%llu\n", |
| (unsigned long long)btrfs_super_chunk_root(sb)); |
| printf("chunk_root_level\t%llu\n", |
| (unsigned long long)btrfs_super_chunk_root_level(sb)); |
| printf("log_root\t\t%llu\n", |
| (unsigned long long)btrfs_super_log_root(sb)); |
| printf("log_root_transid\t%llu\n", |
| (unsigned long long)btrfs_super_log_root_transid(sb)); |
| printf("log_root_level\t\t%llu\n", |
| (unsigned long long)btrfs_super_log_root_level(sb)); |
| printf("total_bytes\t\t%llu\n", |
| (unsigned long long)btrfs_super_total_bytes(sb)); |
| printf("bytes_used\t\t%llu\n", |
| (unsigned long long)btrfs_super_bytes_used(sb)); |
| printf("sectorsize\t\t%llu\n", |
| (unsigned long long)btrfs_super_sectorsize(sb)); |
| printf("nodesize\t\t%llu\n", |
| (unsigned long long)btrfs_super_nodesize(sb)); |
| printf("leafsize\t\t%llu\n", |
| (unsigned long long)btrfs_super_leafsize(sb)); |
| printf("stripesize\t\t%llu\n", |
| (unsigned long long)btrfs_super_stripesize(sb)); |
| printf("root_dir\t\t%llu\n", |
| (unsigned long long)btrfs_super_root_dir(sb)); |
| printf("num_devices\t\t%llu\n", |
| (unsigned long long)btrfs_super_num_devices(sb)); |
| printf("compat_flags\t\t0x%llx\n", |
| (unsigned long long)btrfs_super_compat_flags(sb)); |
| printf("compat_ro_flags\t\t0x%llx\n", |
| (unsigned long long)btrfs_super_compat_ro_flags(sb)); |
| printf("incompat_flags\t\t0x%llx\n", |
| (unsigned long long)btrfs_super_incompat_flags(sb)); |
| printf("csum_type\t\t%llu\n", |
| (unsigned long long)btrfs_super_csum_type(sb)); |
| printf("csum_size\t\t%llu\n", |
| (unsigned long long)btrfs_super_csum_size(sb)); |
| printf("cache_generation\t%llu\n", |
| (unsigned long long)btrfs_super_cache_generation(sb)); |
| printf("uuid_tree_generation\t%llu\n", |
| (unsigned long long)btrfs_super_uuid_tree_generation(sb)); |
| |
| uuid_unparse(sb->dev_item.uuid, buf); |
| printf("dev_item.uuid\t\t%s\n", buf); |
| |
| uuid_unparse(sb->dev_item.fsid, buf); |
| printf("dev_item.fsid\t\t%s %s\n", buf, |
| !memcmp(sb->dev_item.fsid, sb->fsid, BTRFS_FSID_SIZE) ? |
| "[match]" : "[DON'T MATCH]"); |
| |
| printf("dev_item.type\t\t%llu\n", (unsigned long long) |
| btrfs_stack_device_type(&sb->dev_item)); |
| printf("dev_item.total_bytes\t%llu\n", (unsigned long long) |
| btrfs_stack_device_total_bytes(&sb->dev_item)); |
| printf("dev_item.bytes_used\t%llu\n", (unsigned long long) |
| btrfs_stack_device_bytes_used(&sb->dev_item)); |
| printf("dev_item.io_align\t%u\n", (unsigned int) |
| btrfs_stack_device_io_align(&sb->dev_item)); |
| printf("dev_item.io_width\t%u\n", (unsigned int) |
| btrfs_stack_device_io_width(&sb->dev_item)); |
| printf("dev_item.sector_size\t%u\n", (unsigned int) |
| btrfs_stack_device_sector_size(&sb->dev_item)); |
| printf("dev_item.devid\t\t%llu\n", |
| btrfs_stack_device_id(&sb->dev_item)); |
| printf("dev_item.dev_group\t%u\n", (unsigned int) |
| btrfs_stack_device_group(&sb->dev_item)); |
| printf("dev_item.seek_speed\t%u\n", (unsigned int) |
| btrfs_stack_device_seek_speed(&sb->dev_item)); |
| printf("dev_item.bandwidth\t%u\n", (unsigned int) |
| btrfs_stack_device_bandwidth(&sb->dev_item)); |
| printf("dev_item.generation\t%llu\n", (unsigned long long) |
| btrfs_stack_device_generation(&sb->dev_item)); |
| if (full) { |
| printf("sys_chunk_array[%d]:\n", BTRFS_SYSTEM_CHUNK_ARRAY_SIZE); |
| print_sys_chunk_array(sb); |
| printf("backup_roots[%d]:\n", BTRFS_NUM_BACKUP_ROOTS); |
| print_backup_roots(sb); |
| } |
| } |