Function vring_state_changed

dpdk/drivers/net/vhost/rte_eth_vhost.c:929–968

}

static int
vring_state_changed(int vid, uint16_t vring, int enable)
{
	struct rte_vhost_vring_state *state;
	struct rte_eth_dev *eth_dev;
	struct internal_list *list;
	char ifname[PATH_MAX];

	rte_vhost_get_ifname(vid, ifname, sizeof(ifname));
	list = find_internal_resource(ifname);
	if (list == NULL) {
		VHOST_LOG(ERR, "Invalid interface name: %s\n", ifname);
		return -1;
	}

	eth_dev = list->eth_dev;
	/* won't be NULL */
	state = vring_states[eth_dev->data->port_id];

	if (eth_dev->data->dev_conf.intr_conf.rxq && vring % 2)
		eth_vhost_update_intr(eth_dev, (vring - 1) >> 1);

	rte_spinlock_lock(&state->lock);
	if (state->cur[vring] == enable) {
		rte_spinlock_unlock(&state->lock);
		return 0;
	}
	state->cur[vring] = enable;
	state->max_vring = RTE_MAX(vring, state->max_vring);
	rte_spinlock_unlock(&state->lock);

	update_queuing_status(eth_dev, false);

	VHOST_LOG(INFO, "vring%u is %s\n",
			vring, enable ? "enabled" : "disabled");

	rte_eth_dev_callback_process(eth_dev, RTE_ETH_EVENT_QUEUE_STATE, NULL);

	return 0;
}

static struct rte_vhost_device_ops vhost_ops = {
	.new_device          = new_device,