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openvswitch: fix vlan subtraction from packet length

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When the packet has its vlan tag in skb->vlan_tci, the length of the VLAN
header is not counted in skb->len. It doesn't make sense to subtract it.

Fixes: 018c1dda5f ("openvswitch: 802.1AD Flow handling, actions, vlan parsing, netlink attributes")
Signed-off-by: Jiri Benc <jbenc@redhat.com>
Acked-by: Pravin B Shelar <pshelar@ovn.org>
Acked-by: Eric Garver <e@erig.me>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Jiri Benc 2016-10-10 17:02:43 +02:00 committed by David S. Miller
parent 20ecf1e4e3
commit 72ec108d70
1 changed files with 2 additions and 1 deletions
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3
net/openvswitch/vport.c
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@ -485,7 +485,8 @@ static unsigned int packet_length(const struct sk_buff *skb)
{
unsigned int length = skb->len - ETH_HLEN;
if (skb_vlan_tagged(skb))
if (!skb_vlan_tag_present(skb) &&
eth_type_vlan(skb->protocol))
length -= VLAN_HLEN;
/* Don't subtract for multiple VLAN tags. Most (all?) drivers allow