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Commit 1ba56fb4 authored by Alexander Duyck's avatar Alexander Duyck Committed by David S. Miller
Browse files

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: default avatarAlexander Duyck <alexander.h.duyck@intel.com>
Acked-by: default avatarStephen Hemminger <shemminger@vyatta.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent eb5ce439

drivers/net/vxlan.c

+4 −0
Original line number Diff line number Diff line
@@ -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])