Function rte_vhost_backend_config_change

dpdk/lib/vhost/vhost_user.c:3341–3368

}

int
rte_vhost_backend_config_change(int vid, bool need_reply)
{
	struct vhu_msg_context ctx = {
		.msg = {
			.request.backend = VHOST_USER_BACKEND_CONFIG_CHANGE_MSG,
			.flags = VHOST_USER_VERSION,
			.size = 0,
		}
	};
	struct virtio_net *dev;
	int ret;

	dev = get_device(vid);
	if (!dev)
		return -ENODEV;

	if (!need_reply) {
		ret = send_vhost_backend_message(dev, &ctx);
	} else {
		ctx.msg.flags |= VHOST_USER_NEED_REPLY;
		ret = send_vhost_backend_message_process_reply(dev, &ctx);
	}

	if (ret < 0)
		VHOST_LOG_CONFIG(dev->ifname, ERR, "failed to send config change (%d)\n", ret);
	return ret;
}

static int vhost_user_backend_set_vring_host_notifier(struct virtio_net *dev,
						    int index, int fd,