int dpif_port_list(const struct dpif *, struct odp_port **, size_t *n_ports);
int dpif_port_group_set(struct dpif *, uint16_t group,
int dpif_port_list(const struct dpif *, struct odp_port **, size_t *n_ports);
int dpif_port_group_set(struct dpif *, uint16_t group,