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From: Jiri Olsa <jolsa@redhat.com>
To: Arnaldo Carvalho de Melo <arnaldo.melo@gmail.com>
Cc: Jiri Olsa <jolsa@kernel.org>, lkml <linux-kernel@vger.kernel.org>,
	Ingo Molnar <mingo@kernel.org>,
	Namhyung Kim <namhyung@kernel.org>,
	Alexander Shishkin <alexander.shishkin@linux.intel.com>,
	Peter Zijlstra <a.p.zijlstra@chello.nl>,
	Adrian Hunter <adrian.hunter@intel.com>,
	Andi Kleen <ak@linux.intel.com>,
	Stephane Eranian <eranian@google.com>,
	Alexey Budankov <alexey.budankov@linux.intel.com>
Subject: Re: [PATCH 10/20] perf data: Add directory support
Date: Mon, 25 Feb 2019 16:36:48 +0100	[thread overview]
Message-ID: <20190225153648.GG14757@krava> (raw)
In-Reply-To: <20190225150722.GQ31136@kernel.org>

On Mon, Feb 25, 2019 at 12:07:22PM -0300, Arnaldo Carvalho de Melo wrote:

SNIP

> > > > +}
> > > > +
> > > >  static int open_file_read(struct perf_data *data)
> > > >  {
> > > >  	struct stat st;
> > > > @@ -254,6 +270,22 @@ static int open_file_dup(struct perf_data *data)
> > > >  	return open_file(data);
> > > >  }
> > > >  
> > > > +static int open_dir(struct perf_data *data)
> > > > +{
> > > > +	if (perf_data__is_write(data) &&
> > > > +	    mkdir(data->path, S_IRWXU) < 0)
> > > > +		return -1;
> > > > +
> > > > +	/*
> > > > +	 * So far we open only the header, so we
> > > > +	 * can read the data version and layout.
> > > > +	 */
> > > > +	if (asprintf(&data->file.path, "%s/header", data->path) < 0)
> > > > +		return -ENOMEM;
> > > 
> > > so, if this fails, then we should unwind the mkdir, if it was
> > > performed, so that we leave things as they were before calling
> > > open_dir(), right?
> > 
> > I think we need to some global solution on this,
> 
> If we don't add more, that would be a good thing :-)
> 
> The other parts also need to be investigated to see what is best in that
> case, but here, undoing the mkdir() if the asprintf() fails is the right
> thing to do :-)

true ;-) will resend

thanks,
jirka

  reply	other threads:[~2019-02-25 15:36 UTC|newest]

Thread overview: 32+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-02-24 19:06 [PATCHv3 00/20] perf record: Add support to store data in directory Jiri Olsa
2019-02-24 19:06 ` [PATCH 01/20] perf tools: Add depth checking to rm_rf Jiri Olsa
2019-02-28  8:00   ` [tip:perf/core] " tip-bot for Jiri Olsa
2019-02-24 19:06 ` [PATCH 02/20] perf tools: Add pattern name " Jiri Olsa
2019-02-28  8:00   ` [tip:perf/core] " tip-bot for Jiri Olsa
2019-02-24 19:06 ` [PATCH 03/20] perf tools: Add rm_rf_perf_data function Jiri Olsa
2019-02-28  8:01   ` [tip:perf/core] " tip-bot for Jiri Olsa
2019-02-24 19:06 ` [PATCH 04/20] perf data: Move size to struct perf_data_file Jiri Olsa
2019-02-24 19:06 ` [PATCH 05/20] perf data: Add global path holder Jiri Olsa
2019-02-24 19:06 ` [PATCH 06/20] perf data: Make check_backup work over directories Jiri Olsa
2019-02-28  8:02   ` [tip:perf/core] " tip-bot for Jiri Olsa
2019-02-24 19:06 ` [PATCH 07/20] perf data: Fail check_backup in case of error Jiri Olsa
2019-02-28  8:02   ` [tip:perf/core] " tip-bot for Jiri Olsa
2019-02-24 19:06 ` [PATCH 08/20] perf data: Add perf_data__(create_dir|close_dir) functions Jiri Olsa
2019-02-28  8:03   ` [tip:perf/core] " tip-bot for Jiri Olsa
2019-02-24 19:06 ` [PATCH 09/20] perf data: Add perf_data__open_dir_data function Jiri Olsa
2019-02-28  8:04   ` [tip:perf/core] " tip-bot for Jiri Olsa
2019-02-24 19:06 ` [PATCH 10/20] perf data: Add directory support Jiri Olsa
2019-02-25 13:45   ` Arnaldo Carvalho de Melo
2019-02-25 13:56     ` Jiri Olsa
2019-02-25 15:07       ` Arnaldo Carvalho de Melo
2019-02-25 15:36         ` Jiri Olsa [this message]
2019-02-24 19:06 ` [PATCH 11/20] perf data: Don't store auxtrace index for directory data file Jiri Olsa
2019-02-24 19:06 ` [PATCH 12/20] perf data: Add perf_data__update_dir function Jiri Olsa
2019-02-24 19:06 ` [PATCH 13/20] perf data: Make perf_data__size to work over directory Jiri Olsa
2019-02-24 19:06 ` [PATCH 14/20] perf header: Add DIR_FORMAT feature to describe directory data Jiri Olsa
2019-02-24 19:06 ` [PATCH 15/20] perf session: Add process callback to reader object Jiri Olsa
2019-02-24 19:06 ` [PATCH 16/20] perf session: Add __perf_session__process_dir_events function Jiri Olsa
2019-02-24 19:06 ` [PATCH 17/20] perf session: Add path to reader object Jiri Olsa
2019-02-24 19:06 ` [PATCH 18/20] perf record: Add --dir option to store data in directory Jiri Olsa
2019-02-24 19:06 ` [PATCH 19/20] perf record: Add --output-dir " Jiri Olsa
2019-02-24 19:06 ` [PATCH 20/20] perf record: Describe perf.data directory format Jiri Olsa

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