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   1 #ifndef __DISKIO__
   2 #define __DISKIO__
   3
   4 struct tree_buffer {
   5         u64 blocknr;
   6         int count;
   7         union {
   8                 struct node node;
   9                 struct leaf leaf;
  10         };
  11 };
  12
  13 struct tree_buffer *read_tree_block(struct ctree_root *root, u64 blocknr);
  14 int write_tree_block(struct ctree_root *root, struct tree_buffer *buf);
  15 struct ctree_root *open_ctree(char *filename, struct ctree_super_block *s);
  16 int close_ctree(struct ctree_root *root);
  17 void tree_block_release(struct ctree_root *root, struct tree_buffer *buf);
  18 struct tree_buffer *alloc_free_block(struct ctree_root *root);
  19 int write_ctree_super(struct ctree_root *root, struct ctree_super_block *s);
  20 int mkfs(int fd);
  21
  22 #define CTREE_SUPER_INFO_OFFSET(bs) (16 * (bs))
  23
  24 #endif