netdev - [PATCH net-next 0/6] nfp: flower: add support for multi-zone conntrack

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Date:   Tue, 14 Mar 2023 08:36:04 +0200
From:   Louis Peens <louis.peens@...igine.com>
To:     David Miller <davem@...emloft.net>,
        Jakub Kicinski <kuba@...nel.org>,
        Paolo Abeni <pabeni@...hat.com>
Cc:     Simon Horman <simon.horman@...igine.com>, netdev@...r.kernel.org,
        oss-drivers@...igine.com
Subject: [PATCH net-next 0/6] nfp: flower: add support for multi-zone conntrack

This series add changes to support offload of connection tracking across
multiple zones. Previously the driver only supported offloading of a
single goto_chain, spanning a single zone. This was implemented by
merging a pre_ct rule, post_ct rule and the nft rule. This series
provides updates to let the original post_ct rule act as the new pre_ct
rule for a next set of merges if it contains another goto and
conntrack action. In pseudo-tc rule format this adds support for:

    ingress chain 0 proto ip flower
        action ct zone 1 pipe action goto 1

    ingress chain 1 proto ip flower ct_state +tr+new ct_zone 1
        action ct_clear pipe action ct zone 2 pipe action goto 2
    ingress chain 1 proto ip flower ct_state +tr+est ct_zone 1
        action ct_clear pipe action ct zone 2 pipe action goto 2

    ingress chain 2 proto ip flower ct_state +tr+new ct_zone 2
        action mirred egress redirect dev ...
    ingress chain 2 proto ip flower ct_state +tr+est ct_zone 2
        action mirred egress redirect dev ...

This can continue for up to a maximum of 4 zone recirculations.

The first few patches are some smaller preparation patches while the
last one introduces the functionality.

Wentao Jia (6):
  nfp: flower: add get_flow_act_ct() for ct action
  nfp: flower: refactor function "is_pre_ct_flow"
  nfp: flower: refactor function "is_post_ct_flow"
  nfp: flower: add goto_chain_index for ct entry
  nfp: flower: prepare for parameterisation of number of offload rules
  nfp: flower: offload tc flows of multiple conntrack zones

 .../ethernet/netronome/nfp/flower/conntrack.c | 260 ++++++++++++++----
 .../ethernet/netronome/nfp/flower/conntrack.h |  32 ++-
 .../ethernet/netronome/nfp/flower/offload.c   |   2 +-
 3 files changed, 230 insertions(+), 64 deletions(-)

-- 
2.34.1