parse_tunnel
if (tunnel->parse_tunnel) {
err = tunnel->parse_tunnel(priv, spec, f,
int (*parse_tunnel)(struct mlx5e_priv *priv,
.parse_tunnel = mlx5e_tc_tun_parse_geneve,
.parse_tunnel = mlx5e_tc_tun_parse_gretap,
.parse_tunnel = parse_tunnel,
.parse_tunnel = mlx5e_tc_tun_parse_vxlan,