linux-kernel - Re: [PATCH net-next v5 00/11] tools: ynl: prepare for wireguard

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Message-ID: <20250916153932.200647ad@kernel.org>
Date: Tue, 16 Sep 2025 15:39:32 -0700
From: Jakub Kicinski <kuba@...nel.org>
To: "Jason A. Donenfeld" <Jason@...c4.com>
Cc: Asbjørn Sloth Tønnesen
 <ast@...erby.net>, "David S. Miller" <davem@...emloft.net>, Eric Dumazet
 <edumazet@...gle.com>, Paolo Abeni <pabeni@...hat.com>, Donald Hunter
 <donald.hunter@...il.com>, Simon Horman <horms@...nel.org>, Jacob Keller
 <jacob.e.keller@...el.com>, Sabrina Dubroca <sd@...asysnail.net>,
 wireguard@...ts.zx2c4.com, netdev@...r.kernel.org,
 linux-kernel@...r.kernel.org
Subject: Re: [PATCH net-next v5 00/11] tools: ynl: prepare for wireguard

On Tue, 16 Sep 2025 17:53:00 +0200 Jason A. Donenfeld wrote:
> On Mon, Sep 15, 2025 at 4:47 PM Asbjørn Sloth Tønnesen <ast@...erby.net> wrote:
> >
> > This series contains the last batch of YNL changes to support
> > the wireguard YNL conversion.  
> 
> "the wireguard YNL conversion"

FWIW these patches stand on their own whether we accept the wireguard
patches or not. Put more plainly - please do not read me applying this
set as an endorsement of the larger plan..

> Did I miss some conversation about this? I figure I must have. I must
> say I'm not too keen on wireguard (and apparently only wireguard?)
> being a guinea pig for this.

The specs themselves are gaining maturity. I think adding a YNL spec
for wireguard would be quite nice. Whether we should be converting
the kernel code and uAPI to take advantage of the auto-generation is
a completely separate conversation. If you're not anticipating many
new additions in the uAPI there's little to be gained.

Intro:
https://docs.kernel.org/next/userspace-api/netlink/specs.html
Existing specs:
https://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next.git/tree/Documentation/netlink/specs/
Libs:
https://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next.git/tree/tools/net/ynl/pyynl/lib/ynl.py
https://github.com/linux-netdev/ynl-c (this one is also in tree)
https://github.com/linux-netdev/ynl-cpp