[PATCH v6 31/45] trace-cmd library: Add new API to get file version of output handler

["Tzvetomir Stoyanov (VMware)" <tz.stoyanov@gmail.com>]

Added an API to get the version of the trace file, associated with given
output file handler.
  tracecmd_get_out_file_version()

Signed-off-by: Tzvetomir Stoyanov (VMware) <tz.stoyanov@gmail.com>
---
 lib/trace-cmd/include/private/trace-cmd-private.h | 1 +
 lib/trace-cmd/trace-output.c                      | 9 +++++++++
 2 files changed, 10 insertions(+)

diff --git a/lib/trace-cmd/include/private/trace-cmd-private.h b/lib/trace-cmd/include/private/trace-cmd-private.h
index 65e80cec..9a08a960 100644
--- a/lib/trace-cmd/include/private/trace-cmd-private.h
+++ b/lib/trace-cmd/include/private/trace-cmd-private.h
@@ -319,6 +319,7 @@ int tracecmd_append_cpu_data(struct tracecmd_output *handle,
 int tracecmd_append_buffer_cpu_data(struct tracecmd_output *handle,
 				    const char *name, int cpus, char * const *cpu_data_files);
 struct tracecmd_output *tracecmd_get_output_handle_fd(int fd);
+unsigned long tracecmd_get_out_file_version(struct tracecmd_output *handle);
 
 /* --- Reading the Fly Recorder Trace --- */
 
diff --git a/lib/trace-cmd/trace-output.c b/lib/trace-cmd/trace-output.c
index 06d0738e..9b83eb76 100644
--- a/lib/trace-cmd/trace-output.c
+++ b/lib/trace-cmd/trace-output.c
@@ -1966,3 +1966,12 @@ __hidden bool check_out_state(struct tracecmd_output *handle, int new_state)
 {
 	return check_file_state(handle->file_version, handle->file_state, new_state);
 }
+
+/**
+ * tracecmd_get_out_file_version - return the trace.dat file version
+ * @handle: output handle for the trace.dat file
+ */
+unsigned long tracecmd_get_out_file_version(struct tracecmd_output *handle)
+{
+	return handle->file_version;
+}
-- 
2.31.1