Function rte_eth_dev_attach_secondary

dpdk/lib/ethdev/ethdev_driver.c:149–177

* Attach to a port already registered by the primary process, which * makes sure that the same device would have the same port ID both * in the primary and secondary process. */

 * in the primary and secondary process.
 */
struct rte_eth_dev *
rte_eth_dev_attach_secondary(const char *name)
{
	uint16_t i;
	struct rte_eth_dev *eth_dev = NULL;

	/* Synchronize port attachment to primary port creation and release. */
	rte_spinlock_lock(rte_mcfg_ethdev_get_lock());

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

	for (i = 0; i < RTE_MAX_ETHPORTS; i++) {
		if (strcmp(eth_dev_shared_data->data[i].name, name) == 0)
			break;
	}
	if (i == RTE_MAX_ETHPORTS) {
		RTE_ETHDEV_LOG(ERR,
			"Device %s is not driven by the primary process\n",
			name);
	} else {
		eth_dev = eth_dev_get(i);
		RTE_ASSERT(eth_dev->data->port_id == i);
	}

unlock:
	rte_spinlock_unlock(rte_mcfg_ethdev_get_lock());
	return eth_dev;
}

int
rte_eth_dev_callback_process(struct rte_eth_dev *dev,