linux-kernel - Re: [PATCH RFC net-next] pppoe: remove unused kernel-mode relay support

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Message-Id: <5bcf374e-1259-4f0f-b9a1-d405d522effc@app.fastmail.com>
Date: Wed, 11 Feb 2026 10:11:29 +0100
From: "Arnd Bergmann" <arnd@...db.de>
To: "Qingfang Deng" <dqfext@...il.com>
Cc: linux-ppp@...r.kernel.org, rp-pppoe@...ts.skoll.ca,
 "Andrew Lunn" <andrew+netdev@...n.ch>,
 "David S . Miller" <davem@...emloft.net>,
 "Eric Dumazet" <edumazet@...gle.com>, "Jakub Kicinski" <kuba@...nel.org>,
 "Paolo Abeni" <pabeni@...hat.com>, "James Chapman" <jchapman@...alix.com>,
 "Simon Horman" <horms@...nel.org>, Netdev <netdev@...r.kernel.org>,
 linux-kernel@...r.kernel.org, "Michal Ostrowski" <mostrows@...il.com>,
 "Dianne Skoll" <dianne@...ll.ca>, "Paul Mackerras" <paulus@...abs.org>,
 "Jaco Kroon" <jaco@....co.za>, "James Carlson" <carlsonj@...kingcode.com>,
 "Guillaume Nault" <gnault@...hat.com>
Subject: Re: [PATCH RFC net-next] pppoe: remove unused kernel-mode relay support

On Wed, Feb 11, 2026, at 10:00, Qingfang Deng wrote:
> On Wed, Feb 11, 2026 at 4:41 PM Arnd Bergmann <arnd@...db.de> wrote:
>>
>> This will lose all compat ioctl support, not just the emulation for
>> PPPOEIOCSFWD.
>
> So I should only remove the if condition while keeping the
> .compat_ioctl, is that correct?

Yes, exactly. Specifically this will keep the translation for
PPPIOCGMRU, PPPIOCSMRU, PPPIOCSFLAGS, and PPPIOCGL2TPSTATS
socket ioctls, which don't need any translation.

     Arnd