linux-kernel - Re: [PATCH 4/5] perf tools: Support single perf.data file directory

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Date:   Mon, 7 Oct 2019 13:20:27 +0200
From:   Jiri Olsa <jolsa@...hat.com>
To:     Adrian Hunter <adrian.hunter@...el.com>
Cc:     Arnaldo Carvalho de Melo <acme@...nel.org>,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH 4/5] perf tools: Support single perf.data file directory

On Fri, Oct 04, 2019 at 11:31:20AM +0300, Adrian Hunter wrote:

SNIP

>  	u8 pad[8] = {0};
>  
> -	if (!perf_data__is_pipe(data) && !perf_data__is_dir(data)) {
> +	if (!perf_data__is_pipe(data) && perf_data__is_single_file(data)) {
>  		off_t file_offset;
>  		int fd = perf_data__fd(data);
>  		int err;
> diff --git a/tools/perf/util/data.c b/tools/perf/util/data.c
> index df173f0bf654..964ea101dba6 100644
> --- a/tools/perf/util/data.c
> +++ b/tools/perf/util/data.c
> @@ -76,6 +76,13 @@ int perf_data__open_dir(struct perf_data *data)
>  	DIR *dir;
>  	int nr = 0;
>  
> +	/*
> +	 * Directory containing a single regular perf data file which is already
> +	 * open, means there is nothing more to do here.
> +	 */
> +	if (perf_data__is_single_file(data))
> +		return 0;
> +

cool, I like this approach much more than the previous flag

any change you (if there's repost) or Arnaldo
could squeeze in indent change below?

thanks,
jirka


---
diff --git a/tools/perf/util/session.c b/tools/perf/util/session.c
index bfa80fe8d369..7f567a521cea 100644
--- a/tools/perf/util/session.c
+++ b/tools/perf/util/session.c
@@ -227,8 +227,8 @@ struct perf_session *perf_session__new(struct perf_data *data,
 			/* Open the directory data. */
 			if (data->is_dir) {
 				ret = perf_data__open_dir(data);
-			if (ret)
-				goto out_delete;
+				if (ret)
+					goto out_delete;
 			}
 
 			if (!symbol_conf.kallsyms_name &&