netdev - Re: [PATCH net] net/sched: act_ct: Always fill offloading tuple iifidx

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Date: Tue, 7 Nov 2023 11:27:54 -0500
From: Simon Horman <horms@...nel.org>
To: Vlad Buslov <vladbu@...dia.com>
Cc: davem@...emloft.net, kuba@...nel.org, pabeni@...hat.com,
	netdev@...r.kernel.org, jhs@...atatu.com, xiyou.wangcong@...il.com,
	jiri@...nulli.us, pablo@...filter.org,
	Paul Blakey <paulb@...dia.com>
Subject: Re: [PATCH net] net/sched: act_ct: Always fill offloading tuple
 iifidx

On Fri, Nov 03, 2023 at 04:14:10PM +0100, Vlad Buslov wrote:
> Referenced commit doesn't always set iifidx when offloading the flow to
> hardware. Fix the following cases:
> 
> - nf_conn_act_ct_ext_fill() is called before extension is created with
> nf_conn_act_ct_ext_add() in tcf_ct_act(). This can cause rule offload with
> unspecified iifidx when connection is offloaded after only single
> original-direction packet has been processed by tc data path. Always fill
> the new nf_conn_act_ct_ext instance after creating it in
> nf_conn_act_ct_ext_add().
> 
> - Offloading of unidirectional UDP NEW connections is now supported, but ct
> flow iifidx field is not updated when connection is promoted to
> bidirectional which can result reply-direction iifidx to be zero when
> refreshing the connection. Fill in the extension and update flow iifidx
> before calling flow_offload_refresh().

Hi Vlad,

these changes look good to me. However, I do wonder if the changes for each
of the two points above should be split into two patches, and
if the fixes tag for the second point should be.

Fixes: 6a9bad0069cf ("net/sched: act_ct: offload UDP NEW connections")

> Fixes: 9795ded7f924 ("net/sched: act_ct: Fill offloading tuple iifidx")
> Reviewed-by: Paul Blakey <paulb@...dia.com>
> Signed-off-by: Vlad Buslov <vladbu@...dia.com>

...