[ovs-dev] [PATCH ovn 0/4] Reduce number of flows in IN_IP_INPUT table for DNAT.

Numan Siddique numans at ovn.org
Fri Jun 26 13:05:17 UTC 2020

On Wed, Jun 24, 2020 at 9:21 PM Dumitru Ceara <dceara at redhat.com> wrote:

> The first three patches refactor the ARP/NS responder code for logical
> routers in order to make it easier for patch #4 to configure the flows
> with different priorities depending on logical port type.
> Suggested-by: Han Zhou <hzhou at ovn.org>
> Reported-by: Girish Moodalbail <gmoodalbail at gmail.com>
> Reported-at:
> https://mail.openvswitch.org/pipermail/ovs-discuss/2020-June/050186.html
> Signed-off-by: Dumitru Ceara <dceara at redhat.com>
> Dumitru Ceara (4):
>       ovn-northd: Store ETH address of router inport in xxreg0.
>       ovn-northd: Refactor ARP/NS responder in router pipeline.
>       ovn-northd: Refactor NAT address parsing.
>       ovn-northd: Minimize number of ARP/NS responder flows for DNAT.

Hi Dumitru,

Thanks for this patch series.

I didn't review them thoroughly. I've few comments.

1. Looks like reg0 and xxreg0 are already used in the router pipeline. I
think it's better to use a different register (xxreg1 may be).
   I'd suggest adding a new macro REG_IP_ROUTING (or something more
meaningful) instead of using reg0/xxreg0 in the existing
   code in the lr_in_ip_input/lr_in_arp_resolve stages.

2. Does patch 2 require updating the ovn-northd.8.xml ?

3. For patches which modify the logical flows, can you please add a few
test cases in ovn-northd.at. That would also help me while
   reviewing the code :)


>  northd/ovn-northd.8.xml |   38 ++-
>  northd/ovn-northd.c     |  565
> ++++++++++++++++++++++++++++-------------------
>  tests/ovn.at            |    8 -
>  3 files changed, 361 insertions(+), 250 deletions(-)
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