def _dict_from_line(line):
            if not line:
                return {}
            try:
                return jsonutils.loads(line)
            except (TypeError, ValueError) as e:
                msg = (_("Could not load line %(line)s, got error "
                        "%(error)s") %
                        {'line': line, 'error': e})
                raise exception.InvalidDiskInfo(reason=msg)