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

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Date: Fri, 9 Feb 2024 13:11:19 -0800
From: Stephen Hemminger <stephen@...workplumber.org>
To: Jakub Kicinski <kuba@...nel.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 Thu, 8 Feb 2024 18:27:31 -0800
Jakub Kicinski <kuba@...nel.org> wrote:

> > -	if (!tb[TCA_ACT_BPF_PARMS])
> > +	if (NL_REQ_ATTR_CHECK(extack, nla, tb, TCA_ACT_BPF_PARMS)) {
> > +		NL_SET_ERR_MSG(extack, "Missing required attribute");  
> 
> Please fix the userspace to support missing attr parsing instead.

I was just addressing the error handling. This keeps the same impact as
before, i.e no userspace API change.