[NET]: Fix up RTM_SETLINK handling.

include/linux/netdevice.h

@@ -480,6 +480,7 @@ extern int		register_netdevice(struct net_device *dev);
 extern int		unregister_netdevice(struct net_device *dev);
 extern int 		register_netdevice_notifier(struct notifier_block *nb);
 extern int		unregister_netdevice_notifier(struct notifier_block *nb);
+extern int		call_netdevice_notifiers(unsigned long val, void *v);
 extern int		dev_new_index(void);
 extern struct net_device	*dev_get_by_index(int ifindex);
 extern struct net_device	*__dev_get_by_index(int ifindex);

net/core/dev.c

@@ -877,6 +877,18 @@ int unregister_netdevice_notifier(struct notifier_block *nb)
 	return notifier_chain_unregister(&netdev_chain, nb);
 }
 
+/**
+ *	call_netdevice_notifiers - call all network notifier blocks
+ *
+ *	Call all network notifier blocks.  Parameters and return value
+ *	are as for notifier_call_chain().
+ */
+
+int call_netdevice_notifiers(unsigned long val, void *v)
+{
+	return notifier_call_chain(&netdev_chain, val, v);
+}
+
 /*
  *	Support routine. Sends outgoing frames to any network
  *	taps currently in use.

net/core/rtnetlink.c

@@ -234,10 +234,20 @@ static int do_setlink(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg)
 	err = -EINVAL;
 
 	if (ida[IFLA_ADDRESS - 1]) {
+		if (!dev->set_mac_address) {
+			err = -EOPNOTSUPP;
+			goto out;
+		}
+		if (!netif_device_present(dev)) {
+			err = -ENODEV;
+			goto out;
+		}
 		if (ida[IFLA_ADDRESS - 1]->rta_len != RTA_LENGTH(dev->addr_len))
 			goto out;
-		memcpy(dev->dev_addr, RTA_DATA(ida[IFLA_ADDRESS - 1]),
-		       dev->addr_len);
+
+		err = dev->set_mac_address(dev, RTA_DATA(ida[IFLA_ADDRESS - 1]));
+		if (err)
+			goto out;
 	}
 
 	if (ida[IFLA_BROADCAST - 1]) {
@@ -250,6 +260,9 @@ static int do_setlink(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg)
 	err = 0;
 
 out:
+	if (!err)
+		call_netdevice_notifiers(NETDEV_CHANGEADDR, dev);
+
 	dev_put(dev);
 	return err;
 }

net/netsyms.c

@@ -508,6 +508,7 @@ EXPORT_SYMBOL(tr_type_trans);
 /* Device callback registration */
 EXPORT_SYMBOL(register_netdevice_notifier);
 EXPORT_SYMBOL(unregister_netdevice_notifier);
+EXPORT_SYMBOL(call_netdevice_notifiers);
 
 /* support for loadable net drivers */
 #ifdef CONFIG_NET