disk-io.h

   1 #ifndef __DISKIO__
   2 #define __DISKIO__
   3 #include "list.h"
   4
   5 struct btrfs_buffer {
   6         u64 blocknr;
   7         u64 dev_blocknr;
   8         int count;
   9         int fd;
  10         struct list_head dirty;
  11         struct list_head cache;
  12         union {
  13                 struct btrfs_node node;
  14                 struct btrfs_leaf leaf;
  15         };
  16 };
  17
  18 struct btrfs_buffer *read_tree_block(struct btrfs_root *root, u64 blocknr);
  19 struct btrfs_buffer *find_tree_block(struct btrfs_root *root, u64 blocknr);
  20 int write_tree_block(struct btrfs_trans_handle *trans, struct btrfs_root *root,
  21                      struct btrfs_buffer *buf);
  22 int dirty_tree_block(struct btrfs_trans_handle *trans, struct btrfs_root *root,
  23                      struct btrfs_buffer *buf);
  24 int clean_tree_block(struct btrfs_trans_handle *trans,
  25                      struct btrfs_root *root, struct btrfs_buffer *buf);
  26 int btrfs_commit_transaction(struct btrfs_trans_handle *trans, struct btrfs_root
  27                              *root, struct btrfs_super_block *s);
  28 struct btrfs_root *open_ctree(char *filename, struct btrfs_super_block *s);
  29 struct btrfs_root *open_ctree_fd(int fp, struct btrfs_super_block *super);
  30 int close_ctree(struct btrfs_root *root, struct btrfs_super_block *s);
  31 void btrfs_block_release(struct btrfs_root *root, struct btrfs_buffer *buf);
  32 int write_ctree_super(struct btrfs_trans_handle *trans, struct btrfs_root *root,
  33                       struct btrfs_super_block *s);
  34 int btrfs_map_bh_to_logical(struct btrfs_root *root, struct btrfs_buffer *bh,
  35                              u64 logical);
  36 #define BTRFS_SUPER_INFO_OFFSET (16 * 1024)
  37
  38 #endif