linux-kernel - Re: [RFC 1/1] net: introduce OpenVPN Data Channel Offload (ovpn-dco)

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Message-ID: <52b9d7c9-9f7c-788e-2327-33af63b9c748@openvpn.net>
Date:   Thu, 28 Jul 2022 15:16:10 +0200
From:   Antonio Quartulli <antonio@...nvpn.net>
To:     Andrew Lunn <andrew@...n.ch>
Cc:     netdev@...r.kernel.org, David Miller <davem@...emloft.net>,
        Jakub Kicinski <kuba@...nel.org>, linux-kernel@...r.kernel.org
Subject: Re: [RFC 1/1] net: introduce OpenVPN Data Channel Offload (ovpn-dco)

Hi Andrew,

On 28/07/2022 15:07, Andrew Lunn wrote:
> Also, using a mainline driver out of tree is not easy. The code will
> make use of the latest APIs, and internal APIs are not stable, making
> it hard to use in older kernels. So you end up with out of tree
> wrapper code for whatever version of out of tree Linux you decide to
> support. Take a look at
> 
> https://github.com/open-mesh-mirror/batman-adv

Yeah, this is exactly what we are already doing.
We're just trying to keep is as simple as possible for now:

https://github.com/OpenVPN/ovpn-dco/blob/master/linux-compat.h

Thanks for the pointer anyway (I am already deeply inspired by 
batman-adv, as you may imagine ;-)),

-- 
Antonio Quartulli
OpenVPN Inc.