[ovs-dev] [PATCH v3] datapath: Add support for lwtunnel

[Joe Stringer]

On 31 October 2015 at 04:30, Pravin B Shelar <pshelar at nicira.com> wrote:
> Following patch adds support for lwtunnel to OVS datapath.
> With this change OVS datapath detect lwtunnel support and
> make use of new APIs if available. On older kernel where the
> support is not there the backported tunnel modules are used.
> These backported tunnel devices acts as lwtunnel devices.
> I tried to keep backported module same as upstream for easier
> bug-fix backport. Since STT and LISP are not upstream OVS
> always needs to use respective modules from tunnel compat layer.
> To make it work on kernel 4.3 I have converted STT and LISP
> modules to lwtunnel API model.
>
> lwtunnel make use of skb-dst to pass tunnel information to the
> tunnel module. On older kernel this is not possible. So the
> metadata ref is stored in OVS_CB. Direct call to tunnel transmit
> function is made by respective tunnel vport modules. Similarly
> on receive side tunnel recv directly call netdev-vport-receive
> to pass the skb to OVS.
>
> Major backported components include:
> Geneve, GRE, VXLAN, ip_tunnel, udp-tunnels GRO.
>
> Signed-off-by: Pravin B Shelar <pshelar at nicira.com>

I downloaded this latest version + the travis patches, and still had a
couple of issues:

https://travis-ci.org/joestringer/openvswitch/builds/88822811

Easily fixed though:
https://github.com/joestringer/openvswitch/compare/review/lwtunnel_v3...dev/lwtunnel
https://travis-ci.org/joestringer/openvswitch/builds/88834616

Thanks,
Joe