[VLAN]: Allow setting mac address while device is up

Signed-off-by: Patrick McHardy <kaber@trash.net>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 26 insertions, 0 deletions

diff --git a/net/8021q/vlan_dev.c b/net/8021q/vlan_dev.c
index 1a1740aa9a8..7a36878241d 100644
--- a/net/8021q/vlan_dev.c
+++ b/net/8021q/vlan_dev.c
@@ -665,6 +665,32 @@ int vlan_dev_stop(struct net_device *dev)
 	return 0;
 }
 
+int vlan_set_mac_address(struct net_device *dev, void *p)
+{
+	struct net_device *real_dev = VLAN_DEV_INFO(dev)->real_dev;
+	struct sockaddr *addr = p;
+	int err;
+
+	if (!is_valid_ether_addr(addr->sa_data))
+		return -EADDRNOTAVAIL;
+
+	if (!(dev->flags & IFF_UP))
+		goto out;
+
+	if (compare_ether_addr(addr->sa_data, real_dev->dev_addr)) {
+		err = dev_unicast_add(real_dev, addr->sa_data, ETH_ALEN);
+		if (err < 0)
+			return err;
+	}
+
+	if (compare_ether_addr(dev->dev_addr, real_dev->dev_addr))
+		dev_unicast_delete(real_dev, dev->dev_addr, ETH_ALEN);
+
+out:
+	memcpy(dev->dev_addr, addr->sa_data, ETH_ALEN);
+	return 0;
+}
+
 int vlan_dev_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
 {
 	struct net_device *real_dev = VLAN_DEV_INFO(dev)->real_dev;