netdev - Re: [PATCH net-next 6/6] net/sched: act_ct: Software offload of established flows

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Date:   Tue, 25 Feb 2020 14:16:28 +0200
From:   Paul Blakey <paulb@...lanox.com>
To:     Edward Cree <ecree@...arflare.com>,
        Saeed Mahameed <saeedm@...lanox.com>,
        Oz Shlomo <ozsh@...lanox.com>,
        Jakub Kicinski <jakub.kicinski@...ronome.com>,
        Vlad Buslov <vladbu@...lanox.com>,
        David Miller <davem@...emloft.net>,
        "netdev@...r.kernel.org" <netdev@...r.kernel.org>,
        Jiri Pirko <jiri@...lanox.com>, Roi Dayan <roid@...lanox.com>
Subject: Re: [PATCH net-next 6/6] net/sched: act_ct: Software offload of
 established flows


On 2/24/2020 6:04 PM, Edward Cree wrote:
> On 23/02/2020 11:45, Paul Blakey wrote:
>> Offload nf conntrack processing by looking up the 5-tuple in the
>> zone's flow table.
>>
>> The nf conntrack module will process the packets until a connection is
>> in established state. Once in established state, the ct state pointer
>> (nf_conn) will be restored on the skb from a successful ft lookup.
>>
>> Signed-off-by: Paul Blakey <paulb@...lanox.com>
>> Acked-by: Jiri Pirko <jiri@...lanox.com>
>> ---
>>  net/sched/act_ct.c | 163 ++++++++++++++++++++++++++++++++++++++++++++++++++++-
>>  1 file changed, 160 insertions(+), 3 deletions(-)
>>
>> diff --git a/net/sched/act_ct.c b/net/sched/act_ct.c
>> index b2bc885..3592e24 100644
>> --- a/net/sched/act_ct.c
>> +++ b/net/sched/act_ct.c
> <snip>
>> @@ -645,6 +802,7 @@ static int tcf_ct_act(struct sk_buff *skb, const struct tc_action *a,
>>  			goto out_push;
>>  	}
>>  
>> +do_nat:
>>  	ct = nf_ct_get(skb, &ctinfo);
>>  	if (!ct)
>>  		goto out_push;
>> @@ -662,9 +820,8 @@ static int tcf_ct_act(struct sk_buff *skb, const struct tc_action *a,
>>  		 * even if the connection is already confirmed.
>>  		 */
>>  		nf_conntrack_confirm(skb);
>> -	}
>> -
>> -	tcf_ct_flow_table_process_conn(p->ct_ft, ct, ctinfo);
>> +	} else if (!skip_add)
>> +		tcf_ct_flow_table_process_conn(p->ct_ft, ct, ctinfo);
>>  
> Elseif body should be enclosed in braces, since if body was.
> -ed
thanks, will do