linux-kernel - Re: [PATCH net-next v25 00/23] Introducing OpenVPN Data Channel Offload

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Message-ID: <cc2c26d3-c276-4f6a-a05c-e947798d6345@openvpn.net>
Date: Tue, 8 Apr 2025 09:37:19 +0200
From: Antonio Quartulli <antonio@...nvpn.net>
To: Jiri Slaby <jirislaby@...nel.org>
Cc: Simon Horman <horms@...nel.org>, Shuah Khan <shuah@...nel.org>,
 linux-kernel@...r.kernel.org, linux-kselftest@...r.kernel.org,
 ryazanov.s.a@...il.com, sd@...asysnail.net, Paolo Abeni <pabeni@...hat.com>,
 Andrew Lunn <andrew+netdev@...n.ch>, Jakub Kicinski <kuba@...nel.org>,
 Eric Dumazet <edumazet@...gle.com>, Xiao Liang <shaw.leon@...il.com>,
 Donald Hunter <donald.hunter@...il.com>, steffen.klassert@...unet.com,
 antony.antony@...unet.com, willemdebruijn.kernel@...il.com,
 netdev@...r.kernel.org, David Ahern <dsahern@...nel.org>,
 Andrew Lunn <andrew@...n.ch>, Shuah Khan <skhan@...uxfoundation.org>
Subject: Re: [PATCH net-next v25 00/23] Introducing OpenVPN Data Channel
 Offload

Hi,

On 08/04/2025 08:34, Jiri Slaby wrote:
>> Given:
>  > +#define OVPN_FAMILY_NAME    "ovpn"
> and
>  > ctx->ovpn_dco_id = genl_ctrl_resolve(ctx->nl_sock, OVPN_FAMILY_NAME);
> 
> Is there also an openvpn branch understanding the new (in-kernel) 
> naming? I.e. something like s/ovpn-dco-v2/ovpn/?
> 
> As with 2.6.10, I see:
> $ grep -iE 'offl|dco' log
> 2025-04-08 08:24:59 us=718854 Note: Kernel support for ovpn-dco missing, 
> disabling data channel offload.
> 2025-04-08 08:24:59 us=719060 OpenVPN 2.6.10 x86_64-suse-linux-gnu [SSL 
> (OpenSSL)] [LZO] [LZ4] [EPOLL] [PKCS11] [MH/PKTINFO] [AEAD] [DCO]
> 2025-04-08 08:24:59 us=719110 DCO version: N/A

2.6.x and master do not "speak" the new "ovpn" family, because the new 
uAPI wasn't considered stable yet (due to ongoing reviews).

We have a WIP branch which you can use for test:

https://github.com/mandelbitdev/openvpn/tree/gianmarco/179-ovpn-support

Please do not try to measure performance at this time as we have various 
improvements that we are working on, but we wanted to wait for the first 
version of ovpn to be merged first.

Regards,

-- 
Antonio Quartulli
OpenVPN Inc.