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| author | Mike Manning <mmanning@brocade.com> | 2016-05-27 17:45:07 +0100 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2016-05-31 11:56:48 -0700 |
| commit | 308453aa9156a3b8ee382c0949befb507a32b0c1 (patch) | |
| tree | 145f2f5206b47c3e1234aebc8208c6f872aa3e72 /net/8021q/vlan.c | |
| parent | f2633d2eaaab773ea8b29cea3785cf0f8a8872a5 (diff) | |
| download | linux-308453aa9156a3b8ee382c0949befb507a32b0c1.tar.gz linux-308453aa9156a3b8ee382c0949befb507a32b0c1.tar.bz2 linux-308453aa9156a3b8ee382c0949befb507a32b0c1.zip | |
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 <mmanning@brocade.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/8021q/vlan.c')
| -rw-r--r-- | net/8021q/vlan.c | 5 |
1 files changed, 5 insertions, 0 deletions
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); } |