vhost: support config change slave message

[dpdk.git] / lib / librte_vhost / vhost_user.c

diff --git a/lib/librte_vhost/vhost_user.c b/lib/librte_vhost/vhost_user.c
index 47db316..69b84a8 100644 (file)
--- a/lib/librte_vhost/vhost_user.c
+++ b/lib/librte_vhost/vhost_user.c
@@ -2840,6 +2840,42 @@ vhost_user_iotlb_miss(struct virtio_net *dev, uint64_t iova, uint8_t perm)
        return 0;
 }
 
+static int
+vhost_user_slave_config_change(struct virtio_net *dev, bool need_reply)
+{
+       int ret;
+       struct VhostUserMsg msg = {
+               .request.slave = VHOST_USER_SLAVE_CONFIG_CHANGE_MSG,
+               .flags = VHOST_USER_VERSION,
+               .size = 0,
+       };
+
+       if (need_reply)
+               msg.flags |= VHOST_USER_NEED_REPLY;
+
+       ret = send_vhost_slave_message(dev, &msg);
+       if (ret < 0) {
+               VHOST_LOG_CONFIG(ERR,
+                               "Failed to send config change (%d)\n",
+                               ret);
+               return ret;
+       }
+
+       return process_slave_message_reply(dev, &msg);
+}
+
+int
+rte_vhost_slave_config_change(int vid, bool need_reply)
+{
+       struct virtio_net *dev;
+
+       dev = get_device(vid);
+       if (!dev)
+               return -ENODEV;
+
+       return vhost_user_slave_config_change(dev, need_reply);
+}
+
 static int vhost_user_slave_set_vring_host_notifier(struct virtio_net *dev,
                                                    int index, int fd,
                                                    uint64_t offset,