def image_to_raw(image_href, path, path_tmp):
    with fileutils.remove_path_on_error(path_tmp):
        data = disk_utils.qemu_img_info(path_tmp)

        fmt = data.file_format
        if fmt is None:
            raise exception.ImageUnacceptable(
                reason=_("'qemu-img info' parsing failed."),
                image_id=image_href)

        backing_file = data.backing_file
        if backing_file is not None:
            raise exception.ImageUnacceptable(
                image_id=image_href,
                reason=_("fmt=%(fmt)s backed by: %(backing_file)s") %
                {'fmt': fmt, 'backing_file': backing_file})

        if fmt != "raw":
            staged = "%s.converted" % path
            LOG.debug("%(image)s was %(format)s, converting to raw" %
                      {'image': image_href, 'format': fmt})
            with fileutils.remove_path_on_error(staged):
                disk_utils.convert_image(path_tmp, staged, 'raw')
                os.unlink(path_tmp)

                data = disk_utils.qemu_img_info(staged)
                if data.file_format != "raw":
                    raise exception.ImageConvertFailed(
                        image_id=image_href,
                        reason=_("Converted to raw, but format is "
                                 "now %s") % data.file_format)

                os.rename(staged, path)
        else:
            os.rename(path_tmp, path)
dataset/ETHPy150Open openstack/ironic/ironic/common/images.py/image_to_raw/original