vhost: fix passing destroyed device to destroy callback

[ upstream commit 2344395 ]

Application should be able to obtain information like 'ifname' from
the 'vid' passed to 'destroy_connection' callback. Currently, all the
API calls with passed 'vid' fails with 'device not found'.

Fixes: efba12a ("vhost: add user callbacks for socket open/close")

Signed-off-by: Ilya Maximets <i.maximets@samsung.com>
Reviewed-by: Tiwei Bie <tiwei.bie@intel.com>

lib/librte_vhost/socket.c

@@ -297,13 +297,19 @@ vhost_user_read_cb(int connfd, void *dat, int *remove)
 
 	ret = vhost_user_msg_handler(conn->vid, connfd);
 	if (ret < 0) {
+		struct virtio_net *dev = get_device(conn->vid);
+
 		close(connfd);
 		*remove = 1;
-		vhost_destroy_device(conn->vid);
+
+		if (dev)
+			vhost_destroy_device_notify(dev);
 
 		if (vsocket->notify_ops->destroy_connection)
 			vsocket->notify_ops->destroy_connection(conn->vid);
 
+		vhost_destroy_device(conn->vid);
+
 		pthread_mutex_lock(&vsocket->conn_mutex);
 		TAILQ_REMOVE(&vsocket->conn_list, conn, next);
 		pthread_mutex_unlock(&vsocket->conn_mutex);