[ovs-dev] [RFC v4] Add TCP encap_rcv hook (repost)

[David Miller]

From: Simon Horman <horms at verge.net.au>
Date: Mon, 23 Apr 2012 17:30:08 +0900

> I'm pretty sure the patch I posted added encap_rcv to tcp_sock.
> Am I missing the point?

It did, my eyes are failing me :-)

> Currently I am setting up a listening socket. The Open vSwtich tunneling
> code transmits skbs and using either dev_queue_xmit() or ip_local_out().
> I'm not sure that I have exercised the ip_local_out() case yet.

I don't see where on transmit you're going to realize the primary
stated benefit of STT, that being TSO/GSO.

You'll probably want to gather as many packets as possible into a
larger STT frame for this purpose.  And when switching between STT
tunnels, leave the packet alone since a GRO STT frame on receive will
transparently become a STT GSO frame on transmit.