vxlan: add additional headroom

Tell upper layer protocols to allocate skb with additional headroom.
This avoids allocation and copy in local packet sends.

Signed-off-by: Stephen Hemminger <shemminger@vyatta.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/drivers/net/vxlan.c b/drivers/net/vxlan.c
index 4be2784..0b95d5f 100644 (file)
--- a/drivers/net/vxlan.c
+++ b/drivers/net/vxlan.c
@@ -983,6 +983,7 @@ static void vxlan_setup(struct net_device *dev)
 
        eth_hw_addr_random(dev);
        ether_setup(dev);
+       dev->hard_header_len = ETH_HLEN + VXLAN_HEADROOM;
 
        dev->netdev_ops = &vxlan_netdev_ops;
        dev->destructor = vxlan_free;