fs/btrfs/disk-io.h

   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