linux-kernel - Re: [RFC net-next v2 2/5] net: macsec: introduce mdo_insert_tx

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Message-ID: <a5ef22bc-2457-5eef-7cff-529711c5c242@oss.nxp.com>
Date:   Fri, 25 Aug 2023 13:01:08 +0300
From:   "Radu Pirea (OSS)" <radu-nicolae.pirea@....nxp.com>
To:     Sabrina Dubroca <sd@...asysnail.net>
Cc:     andrew@...n.ch, hkallweit1@...il.com, linux@...linux.org.uk,
        davem@...emloft.net, edumazet@...gle.com, kuba@...nel.org,
        pabeni@...hat.com, richardcochran@...il.com,
        sebastian.tobuschat@....com, netdev@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [RFC net-next v2 2/5] net: macsec: introduce mdo_insert_tx_tag


On 24.08.2023 17:54, Sabrina Dubroca wrote:
> 2023-08-24, 12:16:12 +0300, Radu Pirea (NXP OSS) wrote:
> 
>> +
>> +	if (macsec_is_offloaded(macsec)) {
> 
> Shouldn't that whole adjustment (in both directions) depend on
> ->insert_tx_tag?

I asked myself the same thing and the answer was "It depends". This 
adjustment can be restricted only to the offloaded MACsec devs that 
require a special TX tag. However, the offloaded MACsec devs do not need 
additional headroom/tailroom.
>> +
>> +	if (!macsec->insert_tx_tag)
>> +		return skb;
> 
> I think it would look a bit nicer if this test was moved out, before
> calling insert_tx_tag(). Then if we call insert_tx_tag(), we know we
> have to insert it.
> 

I expected this suggestion :)

-- 
Radu P.