linux-kernel - Re: [PATCH net-next] tools: Fix MSG_SPLICE

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Date:   Mon, 26 Jun 2023 15:56:12 +0200
From:   Matthieu Baerts <matthieu.baerts@...sares.net>
To:     David Howells <dhowells@...hat.com>
Cc:     netdev@...r.kernel.org, Arnaldo Carvalho de Melo <acme@...hat.com>,
        David Miller <davem@...emloft.net>,
        Eric Dumazet <edumazet@...gle.com>,
        Jakub Kicinski <kuba@...nel.org>,
        Paolo Abeni <pabeni@...hat.com>, Jens Axboe <axboe@...nel.dk>,
        Matthew Wilcox <willy@...radead.org>,
        Peter Zijlstra <peterz@...radead.org>,
        Ingo Molnar <mingo@...hat.com>,
        Arnaldo Carvalho de Melo <acme@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        Alexander Shishkin <alexander.shishkin@...ux.intel.com>,
        Jiri Olsa <jolsa@...nel.org>,
        Namhyung Kim <namhyung@...nel.org>,
        Ian Rogers <irogers@...gle.com>,
        Adrian Hunter <adrian.hunter@...el.com>,
        linux-perf-users@...r.kernel.org, bpf@...r.kernel.org,
        linux-next@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH net-next] tools: Fix MSG_SPLICE_PAGES build error in trace
 tools

On 26/06/2023 15:50, David Howells wrote:
> Matthieu Baerts <matthieu.baerts@...sares.net> wrote:
> 
>> So another issue. When checking the differences between the two files, I
>> see there are still also other modifications to import, e.g. it looks
>> like you also added MSG_INTERNAL_SENDMSG_FLAGS macro in socket.h. Do you
>> plan to fix that too?
> 
> That's just a list of other flags that we need to prevent userspace passing
> in - it's not a flag in its own right.

I agree. This file is not even used by C files, only by scripts parsing
it if I'm not mistaken.

But if there are differences with include/linux/socket.h, the warning I
mentioned will be visible when compiling Perf.

Cheers,
Matt
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