Received-SPF: pass (google.com: domain of linux-kernel+bounces-181299-linux.lists.archive=gmail.com@vger.kernel.org designates 139.178.88.99 as permitted sender) client-ip=139.178.88.99;
Precedence: bulk
MIME-Version: 1.0
References: <20240515054443.2824147-1-weilin.wang@intel.com> <20240515054443.2824147-3-weilin.wang@intel.com>
In-Reply-To: <20240515054443.2824147-3-weilin.wang@intel.com>
From: Ian Rogers <irogers@google.com>
Date: Thu, 16 May 2024 09:11:15 -0700
Message-ID: <CAP-5=fXcdUYY8KBTTq3QNxkBF2K6YjuQGtLSujRoRfehgLLKgA@mail.gmail.com>
Subject: Re: [RFC PATCH v8 2/7] perf data: Allow to use given fd in data->file.fd
To: weilin.wang@intel.com
Cc: Namhyung Kim <namhyung@kernel.org>, Arnaldo Carvalho de Melo <acme@kernel.org>, 
	Peter Zijlstra <peterz@infradead.org>, Ingo Molnar <mingo@redhat.com>, 
	Alexander Shishkin <alexander.shishkin@linux.intel.com>, Jiri Olsa <jolsa@kernel.org>, 
	Adrian Hunter <adrian.hunter@intel.com>, Kan Liang <kan.liang@linux.intel.com>, 
	linux-perf-users@vger.kernel.org, linux-kernel@vger.kernel.org, 
	Perry Taylor <perry.taylor@intel.com>, Samantha Alt <samantha.alt@intel.com>, 
	Caleb Biggers <caleb.biggers@intel.com>
Content-Type: text/plain; charset="UTF-8"
Content-Transfer-Encoding: quoted-printable

On Tue, May 14, 2024 at 10:44=E2=80=AFPM <weilin.wang@intel.com> wrote:
>
> From: Weilin Wang <weilin.wang@intel.com>
>
> When in PIPE mode, allow to use fd dynamically opened and asigned to
> data->file.fd instead of STDIN_FILENO or STDOUT_FILENO.
>
> Signed-off-by: Weilin Wang <weilin.wang@intel.com>

Reviewed-by: Ian Rogers <irogers@google.com>

Thanks,
Ian

> ---
>  tools/perf/util/data.c | 7 ++++++-
>  1 file changed, 6 insertions(+), 1 deletion(-)
>
> diff --git a/tools/perf/util/data.c b/tools/perf/util/data.c
> index 08c4bfbd817f..98661ede2a73 100644
> --- a/tools/perf/util/data.c
> +++ b/tools/perf/util/data.c
> @@ -204,7 +204,12 @@ static bool check_pipe(struct perf_data *data)
>                                 data->file.fd =3D fd;
>                                 data->use_stdio =3D false;
>                         }
> -               } else {
> +
> +               /*
> +                * When is_pipe and data->file.fd is given, use given fd
> +                * instead of STDIN_FILENO or STDOUT_FILENO
> +                */
> +               } else if (data->file.fd <=3D 0) {
>                         data->file.fd =3D fd;
>                 }
>         }
> --
> 2.43.0
>