perf data: Support having perf.data stored as a directory

The caller needs to set 'struct perf_data::is_dir flag and the path will
be treated as a directory.

The 'struct perf_data::file' is initialized and open as 'path/header'
file.

Add a check to the direcory interface functions to check the is_dir flag.

Signed-off-by: Jiri Olsa <jolsa@kernel.org>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Alexey Budankov <alexey.budankov@linux.intel.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Link: http://lkml.kernel.org/r/20190308134745.5057-2-jolsa@kernel.org
[ Be consistent on how to signal failure, i.e. use -1 and let users check errno ]
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

1 files changed, 6 insertions, 0 deletions

diff --git a/tools/perf/util/data.h b/tools/perf/util/data.h
index 14b47be2bd69..06aefeda311f 100644
--- a/tools/perf/util/data.h
+++ b/tools/perf/util/data.h
@@ -19,6 +19,7 @@ struct perf_data {
 	const char		*path;
 	struct perf_data_file	 file;
 	bool			 is_pipe;
+	bool			 is_dir;
 	bool			 force;
 	enum perf_data_mode	 mode;
 
@@ -43,6 +44,11 @@ static inline int perf_data__is_pipe(struct perf_data *data)
 	return data->is_pipe;
 }
 
+static inline bool perf_data__is_dir(struct perf_data *data)
+{
+	return data->is_dir;
+}
+
 static inline int perf_data__fd(struct perf_data *data)
 {
 	return data->file.fd;