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   1 #ifndef __DISKIO__
   2 #define __DISKIO__
   3
   4 #include <linux/buffer_head.h>
   5
   6 #define BTRFS_SUPER_INFO_OFFSET (16 * 1024)
   7
   8 static inline struct btrfs_node *btrfs_buffer_node(struct buffer_head *bh)
   9 {
  10         return (struct btrfs_node *)bh->b_data;
  11 }
  12
  13 static inline struct btrfs_leaf *btrfs_buffer_leaf(struct buffer_head *bh)
  14 {
  15         return (struct btrfs_leaf *)bh->b_data;
  16 }
  17
  18 static inline struct btrfs_header *btrfs_buffer_header(struct buffer_head *bh)
  19 {
  20         return &((struct btrfs_node *)bh->b_data)->header;
  21 }
  22
  23 struct buffer_head *read_tree_block(struct btrfs_root *root, u64 blocknr);
  24 struct buffer_head *btrfs_find_create_tree_block(struct btrfs_root *root,
  25                                                  u64 blocknr);
  26 int write_tree_block(struct btrfs_trans_handle *trans, struct btrfs_root *root,
  27                      struct buffer_head *buf);
  28 int dirty_tree_block(struct btrfs_trans_handle *trans, struct btrfs_root *root,
  29                      struct buffer_head *buf);
  30 int clean_tree_block(struct btrfs_trans_handle *trans,
  31                      struct btrfs_root *root, struct buffer_head *buf);
  32 int btrfs_commit_transaction(struct btrfs_trans_handle *trans,
  33                              struct btrfs_root *root);
  34 struct btrfs_root *open_ctree(struct super_block *sb);
  35 int close_ctree(struct btrfs_root *root);
  36 void btrfs_block_release(struct btrfs_root *root, struct buffer_head *buf);
  37 int write_ctree_super(struct btrfs_trans_handle *trans,
  38                       struct btrfs_root *root);
  39 struct buffer_head *btrfs_find_tree_block(struct btrfs_root *root, u64 blocknr);
  40 int btrfs_csum_data(struct btrfs_root * root, char *data, size_t len,
  41                     char *result);
  42 struct btrfs_root *btrfs_read_fs_root(struct btrfs_fs_info *fs_info,
  43                                       struct btrfs_key *location);
  44 u64 bh_blocknr(struct buffer_head *bh);
  45 int btrfs_insert_dev_radix(struct btrfs_root *root,
  46                            struct block_device *bdev,
  47                            u64 block_start,
  48                            u64 num_blocks);
  49 int btrfs_map_bh_to_logical(struct btrfs_root *root, struct buffer_head *bh,
  50                              u64 logical);
  51 #endif