struct ibv_device_attr device_attr; /**< Device properties. */
struct ibv_pd *pd; /**< Protection Domain. */
/* Device properties. */
+ unsigned int if_index; /**< Associated network device index */
uint16_t mtu; /**< Configured MTU. */
uint8_t port; /**< Physical port number. */
uint32_t started:1; /**< Device started, flows enabled. */