Virtual net drivers advertise multicast capabilities.

Signed-off-by: Keir Fraser <keir@xensource.com>

linux-2.6-xen-sparse/drivers/xen/netback/loopback.c

@@ -127,6 +127,14 @@ static struct ethtool_ops network_ethtool_ops =
 	.set_tx_csum = ethtool_op_set_tx_csum,
 };
 
+/*
+ * Nothing to do here. Virtual interface is point-to-point and the
+ * physical interface is probably promiscuous anyway.
+ */
+static void loopback_set_multicast_list(struct net_device *dev)
+{
+}
+
 static void loopback_construct(struct net_device *dev, struct net_device *lo)
 {
 	struct net_private *np = netdev_priv(dev);
@@ -137,6 +145,7 @@ static void loopback_construct(struct net_device *dev, struct net_device *lo)
 	dev->stop            = loopback_close;
 	dev->hard_start_xmit = loopback_start_xmit;
 	dev->get_stats       = loopback_get_stats;
+	dev->set_multicast_list = loopback_set_multicast_list;
 
 	dev->tx_queue_len    = 0;
 

linux-2.6-xen-sparse/drivers/xen/netfront/netfront.c

@@ -1094,6 +1094,14 @@ static struct ethtool_ops network_ethtool_ops =
 	.set_tx_csum = ethtool_op_set_tx_csum,
 };
 
+/*
+ * Nothing to do here. Virtual interface is point-to-point and the
+ * physical interface is probably promiscuous anyway.
+ */
+static void network_set_multicast_list(struct net_device *dev)
+{
+}
+
 /** Create a network device.
  * @param handle device handle
  * @param val return parameter for created device
@@ -1163,6 +1171,7 @@ static int create_netdev(int handle, struct xenbus_device *dev,
 	netdev->stop            = network_close;
 	netdev->get_stats       = network_get_stats;
 	netdev->poll            = netif_poll;
+	netdev->set_multicast_list = network_set_multicast_list;
 	netdev->uninit          = netif_uninit;
 	netdev->weight          = 64;
 	netdev->features        = NETIF_F_IP_CSUM;