Reset skb->pkt_type when sending tunneled packets.
Packet can have pkt_type of PACKET_OTHERHOST when coming to ovs bridge.
If such packets are handled by loopback device, the packet is dropped
by ip_rcv().
On the other hand when flow rule isn't installed in kernel datapath,
OVS_ACTION_ATTR_OUTPUT is used to send the packet. In that case, packet
isn't dropped.
netns A | root netns | netns B
veth<->veth=ovs bridge=gre<-loop back->gre=ovs bridge=veth<->veth
arp packet ->
pkt_type
BROADCAST------------>ip_rcv()------------------------>
<- arp reply
pkt_type
rule exists
ip_rcv()<-----------------OTHERHOST
drop
<--------------------ip_rcv()<--- PACKET_HOST rule doesn't exists
pass ^ |
| |upcall
| V
OVS_ACTION_ATTR_OUTPUT
ovs-switchd
Signed-off-by: Isaku Yamahata <yamah...@valinux.co.jp>
---
datapath/tunnel.c | 1 +
1 file changed, 1 insertion(+)
diff --git a/datapath/tunnel.c b/datapath/tunnel.c
index 8c93e18..1975c7b 100644
--- a/datapath/tunnel.c
+++ b/datapath/tunnel.c
@@ -275,6 +275,7 @@ int ovs_tnl_send(struct vport *vport, struct sk_buff *skb,
skb_dst_set(skb, dst_clone(&rt_dst(rt)));
else
skb_dst_set(skb, &rt_dst(rt));
+ skb->pkt_type = PACKET_HOST;
/* Push Tunnel header. */
build_header(vport, skb, tunnel_hlen);
--
1.7.10.4
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