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From: Namhyung Kim <namhyung@kernel.org>
To: Jiri Olsa <jolsa@redhat.com>
Cc: Arnaldo Carvalho de Melo <acme@ghostprotocols.net>,
        Peter Zijlstra <a.p.zijlstra@chello.nl>,
        Paul Mackerras <paulus@samba.org>, Ingo Molnar <mingo@kernel.org>,
        Namhyung Kim <namhyung.kim@lge.com>,
        LKML <linux-kernel@vger.kernel.org>,
        Steven Rostedt <rostedt@goodmis.org>,
        Frederic Weisbecker <fweisbec@gmail.com>,
        David Ahern <dsahern@gmail.com>, Stephane Eranian <eranian@google.com>
Subject: Re: [PATCH 09/19] perf ftrace: Add 'record' sub-command
References: <1372230862-15861-1-git-send-email-namhyung@kernel.org>
	<1372230862-15861-10-git-send-email-namhyung@kernel.org>
	<20130710142821.GC5931@krava.brq.redhat.com>
Date: Thu, 11 Jul 2013 17:00:36 +0900
In-Reply-To: <20130710142821.GC5931@krava.brq.redhat.com> (Jiri Olsa's message
	of "Wed, 10 Jul 2013 16:28:21 +0200")
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On Wed, 10 Jul 2013 16:28:21 +0200, Jiri Olsa wrote:
> On Wed, Jun 26, 2013 at 04:14:12PM +0900, Namhyung Kim wrote:
>> From: Namhyung Kim <namhyung.kim@lge.com>
>
> SNIP
>
>> +
>> +static int create_perf_directory(struct perf_ftrace *ftrace)
>> +{
>> +	int err;
>> +	char buf[PATH_MAX];
>> +	struct stat statbuf;
>> +
>> +	scnprintf(buf, sizeof(buf), "%s.dir", ftrace->dirname);
>> +
>> +	if (stat(buf, &statbuf) == 0) {
>> +		/* same name already exists - rename to *.old.dir */
>> +		char *old_name = malloc(strlen(buf) + 5);
>> +		if (old_name == NULL)
>> +			return -1;
>> +
>> +		scnprintf(old_name, strlen(buf) + 5,
>> +			  "%s.old.dir", ftrace->dirname);
>> +
>> +		if (remove_directory(old_name) < 0) {
>> +			perror("rmdir");
>> +			return -1;
>> +		}
>> +
>> +		if (rename(buf, old_name) < 0) {
>> +			perror("rename");
>> +			free(old_name);
>> +			return -1;
>> +		}
>> +
>> +		free(old_name);
>> +	}
>> +
>> +	err = mkdir(buf, 0755);
>> +	if (err < 0) {
>> +		perror("mkdir");
>> +		return -1;
>> +	}
>> +
>> +	strcat(buf, "/perf.header");
>> +
>> +	err = open(buf, O_RDWR | O_CREAT | O_TRUNC, 0644);
>> +	return err;
>> +}
>
> nitpick.. should this be rather be called create_perf_header,
> which calls create_perf_directory inside?

Looks reasonable.  I'll change the name.

Thanks,
Namhyung