static int nh_valid_get_del_req(const struct nlmsghdr *nlh,
				struct nlattr **tb, u32 *id,
				struct netlink_ext_ack *extack)
static int nh_valid_get_del_req(const struct nlmsghdr *nlh,
				struct nlattr **tb, u32 *id, u32 *op_flags,
				struct netlink_ext_ack *extack)