linux-kernel - Re: [PATCH v1 03/15] perf data: open data directory in read access mode

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Date:   Mon, 12 Oct 2020 19:52:33 +0300
From:   Alexey Budankov <alexey.budankov@...ux.intel.com>
To:     Andi Kleen <ak@...ux.intel.com>
Cc:     Arnaldo Carvalho de Melo <acme@...nel.org>,
        Jiri Olsa <jolsa@...hat.com>,
        Namhyung Kim <namhyung@...nel.org>,
        Alexander Shishkin <alexander.shishkin@...ux.intel.com>,
        Adrian Hunter <adrian.hunter@...el.com>,
        Peter Zijlstra <peterz@...radead.org>,
        Ingo Molnar <mingo@...hat.com>,
        linux-kernel <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v1 03/15] perf data: open data directory in read access
 mode


On 12.10.2020 19:03, Andi Kleen wrote:
> On Mon, Oct 12, 2020 at 11:55:07AM +0300, Alexey Budankov wrote:
>>
>> Open files located at data directory in case of read access mode.
> 
> Need some rationale. Is this a bug fix? Did the case not matter
> before?

This is not a bug fix. The case didn't matter before.

> 
>>
>> Signed-off-by: Alexey Budankov <alexey.budankov@...ux.intel.com>
>> ---
>>  tools/perf/util/data.c | 4 ++++
>>  1 file changed, 4 insertions(+)
>>
>> diff --git a/tools/perf/util/data.c b/tools/perf/util/data.c
>> index c47aa34fdc0a..6ad61ac6ba67 100644
>> --- a/tools/perf/util/data.c
>> +++ b/tools/perf/util/data.c
>> @@ -321,6 +321,10 @@ static int open_dir(struct perf_data *data)
>>  		return -1;
>>  
>>  	ret = open_file(data);
>> +	if (!ret && perf_data__is_dir(data)) {
>> +		if (perf_data__is_read(data))
>> +			ret = perf_data__open_dir(data);
>> +	}
>>  
>>  	/* Cleanup whatever we managed to create so far. */
>>  	if (ret && perf_data__is_write(data))
>> -- 
>> 2.24.1

Alexei