/*
   * btree.h
   * 
   */
  
  
  int befs_btree_find(struct super_block *sb, befs_data_stream * ds,
  		    const char *key, befs_off_t * value);
  
  int befs_btree_read(struct super_block *sb, befs_data_stream * ds,
  		    loff_t key_no, size_t bufsize, char *keybuf,
  		    size_t * keysize, befs_off_t * value);