linux-kernel - Re: [PATCH net-next 03/10] net/tcp: Move tcp_inbound

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Date: Mon, 26 Feb 2024 23:51:49 +0000
From: Dmitry Safonov <dima@...sta.com>
To: Simon Horman <horms@...nel.org>
Cc: Eric Dumazet <edumazet@...gle.com>, "David S. Miller" <davem@...emloft.net>, 
	Jakub Kicinski <kuba@...nel.org>, Paolo Abeni <pabeni@...hat.com>, David Ahern <dsahern@...nel.org>, 
	Shuah Khan <shuah@...nel.org>, Steven Rostedt <rostedt@...dmis.org>, 
	Masami Hiramatsu <mhiramat@...nel.org>, Mathieu Desnoyers <mathieu.desnoyers@...icios.com>, 
	netdev@...r.kernel.org, linux-kernel@...r.kernel.org, 
	linux-kselftest@...r.kernel.org, linux-trace-kernel@...r.kernel.org, 
	Dmitry Safonov <0x7f454c46@...il.com>
Subject: Re: [PATCH net-next 03/10] net/tcp: Move tcp_inbound_hash() from headers

On Mon, Feb 26, 2024 at 8:43 PM Simon Horman <horms@...nel.org> wrote:
>
> On Sat, Feb 24, 2024 at 09:04:11AM +0000, Dmitry Safonov wrote:
[..]
> > +     if (req) {
> > +             if (tcp_rsk_used_ao(req) != !!aoh) {
> > +                     u8 keyid, rnext, maclen;
> > +
> > +                     if (aoh) {
> > +                             keyid = aoh->keyid;
> > +                             rnext = aoh->rnext_keyid;
> > +                             maclen = tcp_ao_hdr_maclen(aoh);
> > +                     } else {
> > +                             keyid = rnext = maclen = 0;
> > +                     }
>
> Hi Dmitry,
>
> it looks like keyid is set but otherwise unused.
>
> Flagged by W=1 builds with gcc-13 and clang-17.

Hi Simon,

Yeah, I think I didn't notice it when I was splitting the WIP patch.
It should be in the very next patch that uses them:
+                       trace_tcp_ao_handshake_failure(sk, skb, keyid,
rnext, maclen);

Thanks for the report, going to fix in v2,
             Dmitry