perf data: Move size to struct perf_data_file

We are about to add support for multiple files, so we need each file to
keep its size.

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/20190221094145.9151-2-jolsa@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

tools/perf/builtin-record.c

@@ -660,10 +660,9 @@ static int process_sample_event(struct perf_tool *tool,
 
 static int process_buildids(struct record *rec)
 {
-	struct perf_data *data = &rec->data;
 	struct perf_session *session = rec->session;
 
-	if (data->size == 0)
+	if (perf_data__size(&rec->data) == 0)
 		return 0;
 
 	/*
@@ -851,7 +850,7 @@ record__finish_output(struct record *rec)
 		return;
 
 	rec->session->header.data_size += rec->bytes_written;
-	data->size = lseek(perf_data__fd(data), 0, SEEK_CUR);
+	data->file.size = lseek(perf_data__fd(data), 0, SEEK_CUR);
 
 	if (!rec->no_buildid) {
 		process_buildids(rec);

tools/perf/util/data.c

@@ -82,7 +82,7 @@ static int open_file_read(struct perf_data *data)
 		goto out_close;
 	}
 
-	data->size = st.st_size;
+	data->file.size = st.st_size;
 	return fd;
 
  out_close:

tools/perf/util/data.h

@@ -12,13 +12,13 @@ enum perf_data_mode {
 struct perf_data_file {
 	const char	*path;
 	int		 fd;
+	unsigned long	 size;
 };
 
 struct perf_data {
 	struct perf_data_file	 file;
 	bool			 is_pipe;
 	bool			 force;
-	unsigned long		 size;
 	enum perf_data_mode	 mode;
 };
 
@@ -44,7 +44,7 @@ static inline int perf_data__fd(struct perf_data *data)
 
 static inline unsigned long perf_data__size(struct perf_data *data)
 {
-	return data->size;
+	return data->file.size;
 }
 
 int perf_data__open(struct perf_data *data);