linux-kernel - Re: [PATCH net-next v2] net/sched: actions report errors with extack

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Message-ID: <20240209183133.1cc0a4f5@kernel.org>
Date: Fri, 9 Feb 2024 18:31:33 -0800
From: Jakub Kicinski <kuba@...nel.org>
To: Stephen Hemminger <stephen@...workplumber.org>
Cc: netdev@...r.kernel.org, Alexei Starovoitov <ast@...nel.org>, Daniel
 Borkmann <daniel@...earbox.net>, Andrii Nakryiko <andrii@...nel.org>,
 Martin KaFai Lau <martin.lau@...ux.dev>, Eduard Zingerman
 <eddyz87@...il.com>, Song Liu <song@...nel.org>, Yonghong Song
 <yonghong.song@...ux.dev>, John Fastabend <john.fastabend@...il.com>, KP
 Singh <kpsingh@...nel.org>, Stanislav Fomichev <sdf@...gle.com>, Hao Luo
 <haoluo@...gle.com>, Jiri Olsa <jolsa@...nel.org>, Jamal Hadi Salim
 <jhs@...atatu.com>, Cong Wang <xiyou.wangcong@...il.com>, Jiri Pirko
 <jiri@...nulli.us>, "David S. Miller" <davem@...emloft.net>, Eric Dumazet
 <edumazet@...gle.com>, Paolo Abeni <pabeni@...hat.com>, bpf@...r.kernel.org
 (open list:BPF [GENERAL] (Safe Dynamic Programs and Tools)),
 linux-kernel@...r.kernel.org (open list)
Subject: Re: [PATCH net-next v2] net/sched: actions report errors with
 extack

On Fri, 9 Feb 2024 15:58:30 -0800 Stephen Hemminger wrote:
> > I mean that NL_REQ_ATTR_CHECK() should be more than enough by itself.
> > We have full TC specs in YAML now, we can hack up a script to generate
> > reverse parsing tables for iproute2 even if you don't want to go full
> > YNL.  
> 
> Ok, then will take the err msg across all places using NL_REQ_ATTR_CHECK?

Take _out_ ? That'd be great, yup.

> Would prefer not to add the complexity of reverse parsing tables, that gets ugly fast.

"reverse" is probably to strong. It's just a parse which parses 
the request instead of the response. ethtool CLI does it, too.