From 308453aa9156a3b8ee382c0949befb507a32b0c1 Mon Sep 17 00:00:00 2001 From: Mike Manning Date: Fri, 27 May 2016 17:45:07 +0100 Subject: vlan: Propagate MAC address to VLANs The MAC address of the physical interface is only copied to the VLAN when it is first created, resulting in an inconsistency after MAC address changes of only newly created VLANs having an up-to-date MAC. The VLANs should continue inheriting the MAC address of the physical interface until the VLAN MAC address is explicitly set to any value. This allows IPv6 EUI64 addresses for the VLAN to reflect any changes to the MAC of the physical interface and thus for DAD to behave as expected. Signed-off-by: Mike Manning Signed-off-by: David S. Miller --- net/8021q/vlan.c | 5 +++++ 1 file changed, 5 insertions(+) (limited to 'net/8021q/vlan.c') diff --git a/net/8021q/vlan.c b/net/8021q/vlan.c index a1e273af6fc8..82a116ba590e 100644 --- a/net/8021q/vlan.c +++ b/net/8021q/vlan.c @@ -290,6 +290,10 @@ static void vlan_sync_address(struct net_device *dev, if (ether_addr_equal(vlan->real_dev_addr, dev->dev_addr)) return; + /* vlan continues to inherit address of lower device */ + if (vlan_dev_inherit_address(vlandev, dev)) + goto out; + /* vlan address was different from the old address and is equal to * the new address */ if (!ether_addr_equal(vlandev->dev_addr, vlan->real_dev_addr) && @@ -302,6 +306,7 @@ static void vlan_sync_address(struct net_device *dev, !ether_addr_equal(vlandev->dev_addr, dev->dev_addr)) dev_uc_add(dev, vlandev->dev_addr); +out: ether_addr_copy(vlan->real_dev_addr, dev->dev_addr); } -- cgit v1.2.3