[ovs-dev] [PATCH net-next v10 2/5] openvswitch: set skb protocol and mac_len when receiving on internal device
Simon Horman
simon.horman at netronome.com
Thu Jun 2 06:24:43 UTC 2016
* Set skb protocol based on contents of packet. I have observed this is
necessary to get actual protocol of a packet when it is injected into an
internal device e.g. by libnet in which case skb protocol will be set to
ETH_ALL.
* Set the mac_len which has been observed to not be set up correctly when
an ARP packet is generated and sent via an openvswitch bridge.
My test case is a scenario where there are two open vswtich bridges.
One outputs to a tunnel port which egresses on the other.
The motivation for this is that support for outputting to layer 3 (non-tap)
GRE tunnels as implemented by a subsequent patch depends on protocol and
mac_len being set correctly on receive.
Signed-off-by: Simon Horman <simon.horman at netronome.com>
---
v10
* Set mac_len
v9
* New patch
---
net/openvswitch/vport-internal_dev.c | 4 ++++
1 file changed, 4 insertions(+)
diff --git a/net/openvswitch/vport-internal_dev.c b/net/openvswitch/vport-internal_dev.c
index 2ee48e447b72..f89b1efa88f1 100644
--- a/net/openvswitch/vport-internal_dev.c
+++ b/net/openvswitch/vport-internal_dev.c
@@ -48,6 +48,10 @@ static int internal_dev_xmit(struct sk_buff *skb, struct net_device *netdev)
{
int len, err;
+ skb->protocol = eth_type_trans(skb, netdev);
+ skb_push(skb, ETH_HLEN);
+ skb_reset_mac_len(skb);
+
len = skb->len;
rcu_read_lock();
err = ovs_vport_receive(internal_dev_priv(netdev)->vport, skb, NULL);
--
2.1.4
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