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openvswitch: use hard_header_len instead of hardcoded ETH_HLEN

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On tx, use hard_header_len while deciding whether to refragment or drop the
packet. That way, all combinations are calculated correctly:

* L2 packet going to L2 interface (the L2 header len is subtracted),
* L2 packet going to L3 interface (the L2 header is included in the packet
  lenght),
* L3 packet going to L3 interface.

Signed-off-by: Jiri Benc <jbenc@redhat.com>
Acked-by: Pravin B Shelar <pshelar@ovn.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Jiri Benc 2016-11-10 16:28:17 +01:00 • committed by David S. Miller
parent c540594f86
commit 738314a084
2 changed files with 8 additions and 5 deletions
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3
net/openvswitch/actions.c
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@ -791,7 +791,8 @@ static void do_output(struct datapath *dp, struct sk_buff *skb, int out_port,
pskb_trim(skb, ETH_HLEN);
}
if (likely(!mru || (skb->len <= mru + ETH_HLEN))) {
if (likely(!mru ||
(skb->len <= mru + vport->dev->hard_header_len))) {
ovs_vport_send(vport, skb);
} else if (mru <= vport->dev->mtu) {
struct net *net = read_pnet(&dp->net);