netdev - [PATCHv2 net-next 0/5] net: eliminate the duplicate code in the ct nat functions of ovs and tc

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Date:   Tue, 22 Nov 2022 12:32:16 -0500
From:   Xin Long <lucien.xin@...il.com>
To:     network dev <netdev@...r.kernel.org>, dev@...nvswitch.org,
        ovs-dev@...nvswitch.org
Cc:     davem@...emloft.net, kuba@...nel.org,
        Eric Dumazet <edumazet@...gle.com>,
        Paolo Abeni <pabeni@...hat.com>,
        Pravin B Shelar <pshelar@....org>,
        Jamal Hadi Salim <jhs@...atatu.com>,
        Cong Wang <xiyou.wangcong@...il.com>,
        Jiri Pirko <jiri@...nulli.us>,
        Pablo Neira Ayuso <pablo@...filter.org>,
        Florian Westphal <fw@...len.de>,
        Marcelo Ricardo Leitner <marcelo.leitner@...il.com>,
        Davide Caratti <dcaratti@...hat.com>,
        Oz Shlomo <ozsh@...dia.com>, Paul Blakey <paulb@...dia.com>,
        Ilya Maximets <i.maximets@....org>,
        Eelco Chaudron <echaudro@...hat.com>,
        Aaron Conole <aconole@...hat.com>
Subject: [PATCHv2 net-next 0/5] net: eliminate the duplicate code in the ct nat functions of ovs and tc

The changes in the patchset:

  "net: add helper support in tc act_ct for ovs offloading"

had moved some common ct code used by both OVS and TC into netfilter.

There are still some big functions pretty similar defined and used in
each of OVS and TC. It is not good to maintain such big function in 2
places. This patchset is to extract the functions for NAT processing
from OVS and TC to netfilter.

To make this change clear and safe, this patchset gets the common code
out of OVS and TC step by step: The patch 1-4 make some minor changes
in OVS and TC to make the NAT code of them completely the same, then
the patch 5 moves the common code to the netfilter and exports one
function called by each of OVS and TC.

v1->v2:
  - Create nf_nat_ovs.c to include the nat functions, as Pablo suggested.

Xin Long (5):
  openvswitch: delete the unncessary skb_pull_rcsum call in
    ovs_ct_nat_execute
  openvswitch: return NF_ACCEPT when OVS_CT_NAT is net set in info nat
  net: sched: return NF_ACCEPT when fails to add nat ext in
    tcf_ct_act_nat
  net: sched: update the nat flag for icmp error packets in
    ct_nat_execute
  net: move the nat function to nf_nat_ovs for ovs and tc

 include/net/netfilter/nf_nat.h |   4 +
 net/netfilter/Makefile         |   2 +-
 net/netfilter/nf_nat_ovs.c     | 135 ++++++++++++++++++++++++++++++
 net/openvswitch/conntrack.c    | 146 +++------------------------------
 net/sched/act_ct.c             | 136 +++---------------------------
 5 files changed, 164 insertions(+), 259 deletions(-)
 create mode 100644 net/netfilter/nf_nat_ovs.c

-- 
2.31.1