Function rte_eth_dev_allocate

dpdk/lib/ethdev/ethdev_driver.c:74–125

}

struct rte_eth_dev *
rte_eth_dev_allocate(const char *name)
{
	uint16_t port_id;
	struct rte_eth_dev *eth_dev = NULL;
	size_t name_len;

	name_len = strnlen(name, RTE_ETH_NAME_MAX_LEN);
	if (name_len == 0) {
		RTE_ETHDEV_LOG(ERR, "Zero length Ethernet device name\n");
		return NULL;
	}

	if (name_len >= RTE_ETH_NAME_MAX_LEN) {
		RTE_ETHDEV_LOG(ERR, "Ethernet device name is too long\n");
		return NULL;
	}

	/* Synchronize port creation between primary and secondary processes. */
	rte_spinlock_lock(rte_mcfg_ethdev_get_lock());

	if (eth_dev_shared_data_prepare() == NULL)
		goto unlock;

	if (eth_dev_allocated(name) != NULL) {
		RTE_ETHDEV_LOG(ERR,
			"Ethernet device with name %s already allocated\n",
			name);
		goto unlock;
	}

	port_id = eth_dev_find_free_port();
	if (port_id == RTE_MAX_ETHPORTS) {
		RTE_ETHDEV_LOG(ERR,
			"Reached maximum number of Ethernet ports\n");
		goto unlock;
	}

	eth_dev = eth_dev_get(port_id);
	strlcpy(eth_dev->data->name, name, sizeof(eth_dev->data->name));
	eth_dev->data->port_id = port_id;
	eth_dev->data->backer_port_id = RTE_MAX_ETHPORTS;
	eth_dev->data->mtu = RTE_ETHER_MTU;
	pthread_mutex_init(&eth_dev->data->flow_ops_mutex, NULL);
	RTE_ASSERT(rte_eal_process_type() == RTE_PROC_PRIMARY);
	eth_dev_shared_data->allocated_ports++;

unlock:
	rte_spinlock_unlock(rte_mcfg_ethdev_get_lock());

	return eth_dev;
}

struct rte_eth_dev *
rte_eth_dev_allocated(const char *name)