1 // SPDX-License-Identifier: GPL-2.0+ 2 #ifndef __BTRFS_DISK_IO_H__ 3 #define __BTRFS_DISK_IO_H__ 4 5 #include <linux/sizes.h> 6 #include <fs_internal.h> 7 #include "ctree.h" 8 #include "disk-io.h" 9 10 #define BTRFS_SUPER_INFO_OFFSET SZ_64K 11 #define BTRFS_SUPER_INFO_SIZE SZ_4K 12 13 /* From btrfs-progs */ 14 int read_whole_eb(struct btrfs_fs_info *info, struct extent_buffer *eb, int mirror); 15 struct extent_buffer* read_tree_block(struct btrfs_fs_info *fs_info, u64 bytenr, 16 u64 parent_transid); 17 18 int read_extent_data(struct btrfs_fs_info *fs_info, char *data, u64 logical, 19 u64 *len, int mirror); 20 struct extent_buffer* btrfs_find_create_tree_block( 21 struct btrfs_fs_info *fs_info, u64 bytenr); 22 struct extent_buffer *btrfs_find_tree_block(struct btrfs_fs_info *fs_info, 23 u64 bytenr, u32 blocksize); 24 struct btrfs_root *btrfs_read_fs_root_no_cache(struct btrfs_fs_info *fs_info, 25 struct btrfs_key *location); 26 struct btrfs_root *btrfs_read_fs_root(struct btrfs_fs_info *fs_info, 27 struct btrfs_key *location); 28 29 void btrfs_setup_root(struct btrfs_root *root, struct btrfs_fs_info *fs_info, 30 u64 objectid); 31 32 void btrfs_free_fs_info(struct btrfs_fs_info *fs_info); 33 struct btrfs_fs_info *btrfs_new_fs_info(void); 34 int btrfs_check_fs_compatibility(struct btrfs_super_block *sb); 35 int btrfs_setup_all_roots(struct btrfs_fs_info *fs_info); 36 void btrfs_release_all_roots(struct btrfs_fs_info *fs_info); 37 void btrfs_cleanup_all_caches(struct btrfs_fs_info *fs_info); 38 39 struct btrfs_fs_info *open_ctree_fs_info(struct blk_desc *desc, 40 struct disk_partition *part); 41 int close_ctree_fs_info(struct btrfs_fs_info *fs_info); 42 43 int btrfs_read_dev_super(struct blk_desc *desc, struct disk_partition *part, 44 struct btrfs_super_block *sb); 45 int btrfs_buffer_uptodate(struct extent_buffer *buf, u64 parent_transid); 46 int btrfs_set_buffer_uptodate(struct extent_buffer *buf); 47 int btrfs_csum_data(u16 csum_type, const u8 *data, u8 *out, size_t len); 48 int csum_tree_block_size(struct extent_buffer *buf, u16 csum_sectorsize, 49 int verify, u16 csum_type); 50 #endif 51