perf data: Support single perf.data file directory

Support directory output that contains a regular perf.data file, named
"data". By default the directory is named perf.data i.e.
	perf.data
	└── data

Most of the infrastructure to support a directory is already there. This
patch makes the changes needed to support the format above.

Presently there is no 'perf record' option to output a directory.

This is preparation for adding support for putting a copy of /proc/kcore in
the directory.

Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Reviewed-by: Jiri Olsa <jolsa@kernel.org>
Link: http://lore.kernel.org/lkml/20191004083121.12182-5-adrian.hunter@intel.com
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 218fe9a16801..f68815f7e428 100644
--- a/tools/perf/util/data.h
+++ b/tools/perf/util/data.h
@@ -10,6 +10,7 @@ enum perf_data_mode {
 };
 
 enum perf_dir_version {
+	PERF_DIR_SINGLE_FILE	= 0,
 	PERF_DIR_VERSION	= 1,
 };
 
@@ -54,6 +55,11 @@ static inline bool perf_data__is_dir(struct perf_data *data)
 	return data->is_dir;
 }
 
+static inline bool perf_data__is_single_file(struct perf_data *data)
+{
+	return data->dir.version == PERF_DIR_SINGLE_FILE;
+}
+
 static inline int perf_data__fd(struct perf_data *data)
 {
 	return data->file.fd;