xfrm_register_type_offload
int xfrm_register_type_offload(const struct xfrm_type_offload *type, unsigned short family);
if (xfrm_register_type_offload(&esp_type_offload, AF_INET) < 0) {
if (xfrm_register_type_offload(&esp6_type_offload, AF_INET6) < 0) {
EXPORT_SYMBOL(xfrm_register_type_offload);