f2fs_truncate_hole
!f2fs_truncate_hole(dir, index, index + 1)) {
int f2fs_truncate_hole(struct inode *inode, pgoff_t pg_start, pgoff_t pg_end);
ret = f2fs_truncate_hole(inode, pg_start, pg_end);
ret = f2fs_truncate_hole(src_inode,
f2fs_truncate_hole(inode, start_index, cur->index);