btrfs_lookup_file_extent
ret = btrfs_lookup_file_extent(NULL, root, path, ino, (u64)-1, 0);
int btrfs_lookup_file_extent(struct btrfs_trans_handle *trans,
ret = btrfs_lookup_file_extent(trans, root, path, ino,
ret = btrfs_lookup_file_extent(NULL, root, path, ino,
ret = btrfs_lookup_file_extent(NULL, root, path, objectid, start, 0);
ret = btrfs_lookup_file_extent(NULL, root, path, btrfs_ino(inode),
ret = btrfs_lookup_file_extent(NULL, root, path, btrfs_ino(inode),
ret = btrfs_lookup_file_extent(NULL, root, path,
ret = btrfs_lookup_file_extent(trans, root, wc->subvol_path,