disk-io.h

   1 #ifndef __DISKIO__
   2 #define __DISKIO__
   3 #include "list.h"
   4
   5 struct btrfs_buffer {
   6         u64 blocknr;
   7         int count;
   8         struct list_head dirty;
   9         struct list_head cache;
  10         union {
  11                 struct btrfs_node node;
  12                 struct btrfs_leaf leaf;
  13         };
  14 };
  15
  16 struct btrfs_buffer *read_tree_block(struct btrfs_root *root, u64 blocknr);
  17 struct btrfs_buffer *find_tree_block(struct btrfs_root *root, u64 blocknr);
  18 int write_tree_block(struct btrfs_trans_handle *trans, struct btrfs_root *root,
  19                      struct btrfs_buffer *buf);
  20 int dirty_tree_block(struct btrfs_trans_handle *trans, struct btrfs_root *root,
  21                      struct btrfs_buffer *buf);
  22 int clean_tree_block(struct btrfs_trans_handle *trans,
  23                      struct btrfs_root *root, struct btrfs_buffer *buf);
  24 int btrfs_commit_transaction(struct btrfs_trans_handle *trans, struct btrfs_root
  25                              *root, struct btrfs_super_block *s);
  26 struct btrfs_root *open_ctree(char *filename, struct btrfs_super_block *s);
  27 struct btrfs_root *open_ctree_fd(int fp, struct btrfs_super_block *super);
  28 int close_ctree(struct btrfs_root *root, struct btrfs_super_block *s);
  29 void btrfs_block_release(struct btrfs_root *root, struct btrfs_buffer *buf);
  30 int write_ctree_super(struct btrfs_trans_handle *trans, struct btrfs_root *root,
  31                       struct btrfs_super_block *s);
  32 int mkfs(int fd, u64 num_blocks, u32 blocksize);
  33
  34 #define BTRFS_SUPER_INFO_OFFSET (16 * 1024)
  35
  36 #endif