Function vhost_new_device

dpdk/lib/vhost/vhost.c:693–744

* Invoked when there is a new vhost-user connection established (when * there is a new virtio device being attached). */

 * there is a new virtio device being attached).
 */
int
vhost_new_device(struct vhost_backend_ops *ops)
{
	struct virtio_net *dev;
	int i;

	if (ops == NULL) {
		VHOST_LOG_CONFIG("device", ERR, "missing backend ops.\n");
		return -1;
	}

	if (ops->iotlb_miss == NULL) {
		VHOST_LOG_CONFIG("device", ERR, "missing IOTLB miss backend op.\n");
		return -1;
	}

	if (ops->inject_irq == NULL) {
		VHOST_LOG_CONFIG("device", ERR, "missing IRQ injection backend op.\n");
		return -1;
	}

	pthread_mutex_lock(&vhost_dev_lock);
	for (i = 0; i < RTE_MAX_VHOST_DEVICE; i++) {
		if (vhost_devices[i] == NULL)
			break;
	}

	if (i == RTE_MAX_VHOST_DEVICE) {
		VHOST_LOG_CONFIG("device", ERR, "failed to find a free slot for new device.\n");
		pthread_mutex_unlock(&vhost_dev_lock);
		return -1;
	}

	dev = rte_zmalloc(NULL, sizeof(struct virtio_net), 0);
	if (dev == NULL) {
		VHOST_LOG_CONFIG("device", ERR, "failed to allocate memory for new device.\n");
		pthread_mutex_unlock(&vhost_dev_lock);
		return -1;
	}

	vhost_devices[i] = dev;
	pthread_mutex_unlock(&vhost_dev_lock);

	dev->vid = i;
	dev->flags = VIRTIO_DEV_BUILTIN_VIRTIO_NET;
	dev->backend_req_fd = -1;
	dev->postcopy_ufd = -1;
	rte_spinlock_init(&dev->backend_req_lock);
	dev->backend_ops = ops;

	return i;
}

void
vhost_destroy_device_notify(struct virtio_net *dev)