netdev - Re: [PATCH net-next v3 3/4] net/mlx5: Consider VLAN interface in MACsec TX steering rules

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Date:   Fri, 31 Mar 2023 15:49:47 +0200
From:   Simon Horman <simon.horman@...igine.com>
To:     Emeel Hakim <ehakim@...dia.com>
Cc:     davem@...emloft.net, kuba@...nel.org, pabeni@...hat.com,
        edumazet@...gle.com, sd@...asysnail.net, netdev@...r.kernel.org,
        leon@...nel.org
Subject: Re: [PATCH net-next v3 3/4] net/mlx5: Consider VLAN interface in
 MACsec TX steering rules

On Thu, Mar 30, 2023 at 04:57:14PM +0300, Emeel Hakim wrote:
> Offloading MACsec when its configured over VLAN with current MACsec
> TX steering rules will wrongly insert MACsec sec tag after inserting
> the VLAN header leading to a ETHERNET | SECTAG | VLAN packet when
> ETHERNET | VLAN | SECTAG is configured.
> 
> The above issue is due to adding the SECTAG by HW which is a later
> stage compared to the VLAN header insertion stage.
> 
> Detect such a case and adjust TX steering rules to insert the
> SECTAG in the correct place by using reformat_param_0 field in
> the packet reformat to indicate the offset of SECTAG from end of
> the MAC header to account for VLANs in granularity of 4Bytes.
> 
> Signed-off-by: Emeel Hakim <ehakim@...dia.com>

Reviewed-by: Simon Horman <simon.horman@...igine.com>