[MACVLAN]: 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, 24 insertions, 0 deletions

diff --git a/drivers/net/macvlan.c b/drivers/net/macvlan.c
index 9f4d65c3095..b7c9791009d 100644
--- a/drivers/net/macvlan.c
+++ b/drivers/net/macvlan.c
@@ -213,6 +213,29 @@ static int macvlan_stop(struct net_device *dev)
         return 0;
 }
 
+static int macvlan_set_mac_address(struct net_device *dev, void *p)
+{
+        struct macvlan_dev *vlan = netdev_priv(dev);
+        struct net_device *lowerdev = vlan->lowerdev;
+        struct sockaddr *addr = p;
+        int err;
+
+        if (!is_valid_ether_addr(addr->sa_data))
+                return -EADDRNOTAVAIL;
+
+        if (!(dev->flags & IFF_UP))
+                goto out;
+
+        err = dev_unicast_add(lowerdev, addr->sa_data, ETH_ALEN);
+        if (err < 0)
+                return err;
+        dev_unicast_delete(lowerdev, dev->dev_addr, ETH_ALEN);
+
+out:
+        memcpy(dev->dev_addr, addr->sa_data, ETH_ALEN);
+        return 0;
+}
+
 static void macvlan_change_rx_flags(struct net_device *dev, int change)
 {
         struct macvlan_dev *vlan = netdev_priv(dev);
@@ -300,6 +323,7 @@ static void macvlan_setup(struct net_device *dev)
         dev->stop               = macvlan_stop;
         dev->change_mtu         = macvlan_change_mtu;
         dev->change_rx_flags    = macvlan_change_rx_flags;
+        dev->set_mac_address    = macvlan_set_mac_address;
         dev->set_multicast_list = macvlan_set_multicast_list;
         dev->hard_start_xmit    = macvlan_hard_start_xmit;
         dev->destructor         = free_netdev;