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authorAlexander Duyck <alexander.h.duyck@intel.com>2012-11-13 13:10:59 +0000
committerDavid S. Miller <davem@davemloft.net>2012-11-13 18:19:50 -0500
commit1ba56fb45a927d083f655302e75a1911a75b5da6 (patch)
treed62c161e151fd65e4da880b8901604d89ea96572 /drivers
parenteb5ce43997b10dd07a63befeb26778d996c5a356 (diff)
downloadlinux-1ba56fb45a927d083f655302e75a1911a75b5da6.tar.bz2
vxlan: Update hard_header_len based on lowerdev when instantiating VXLAN
In the event of a VXLAN device being linked to a device that has a hard_header_len greater than that of standard ethernet we could end up with the hard_header_len not being large enough for outgoing frames. In order to prevent this we should update the length when a lowerdev is provided. Signed-off-by: Alexander Duyck <alexander.h.duyck@intel.com> Acked-by: Stephen Hemminger <shemminger@vyatta.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers')
-rw-r--r--drivers/net/vxlan.c4
1 files changed, 4 insertions, 0 deletions
diff --git a/drivers/net/vxlan.c b/drivers/net/vxlan.c
index 3d0bf664ea35..8b5c61917076 100644
--- a/drivers/net/vxlan.c
+++ b/drivers/net/vxlan.c
@@ -1102,6 +1102,10 @@ static int vxlan_newlink(struct net *net, struct net_device *dev,
if (!tb[IFLA_MTU])
dev->mtu = lowerdev->mtu - VXLAN_HEADROOM;
+
+ /* update header length based on lower device */
+ dev->hard_header_len = lowerdev->hard_header_len +
+ VXLAN_HEADROOM;
}
if (data[IFLA_VXLAN_TOS])