bfs_inode          65 include/uapi/linux/bfs_fs.h         ((((offset) - BFS_BSIZE) / sizeof(struct bfs_inode)) + BFS_ROOT_INO)
bfs_inode          68 include/uapi/linux/bfs_fs.h 	((__u32)(((ino) - BFS_ROOT_INO) * sizeof(struct bfs_inode)) + BFS_BSIZE)