From 41ba2b30e79b7f7069fcc14e5409b8c42cee6df3 Mon Sep 17 00:00:00 2001
From: Konrad Sztyber <konrad.sztyber@intel.com>
Date: Tue, 31 Aug 2021 11:27:14 +0200
Subject: [PATCH] lib/trace_parser: method for retrieving trace flags

It gives user access to things like the tsc rate and tracepoint
definitions.

Signed-off-by: Konrad Sztyber <konrad.sztyber@intel.com>
Change-Id: Ib50126b331faa4508174c7cb707643a3d8db6a01
Reviewed-on: https://review.spdk.io/gerrit/c/spdk/spdk/+/9430
Community-CI: Broadcom CI <spdk-ci.pdl@broadcom.com>
Community-CI: Mellanox Build Bot
Tested-by: SPDK CI Jenkins <sys_sgci@intel.com>
Reviewed-by: Jim Harris <james.r.harris@intel.com>
Reviewed-by: Ben Walker <benjamin.walker@intel.com>
---
 include/spdk/trace_parser.h            | 9 +++++++++
 lib/trace_parser/spdk_trace_parser.map | 1 +
 lib/trace_parser/trace.cpp             | 8 ++++++++
 3 files changed, 18 insertions(+)

diff --git a/include/spdk/trace_parser.h b/include/spdk/trace_parser.h
index 3aefd9f55c..b59071b7da 100644
--- a/include/spdk/trace_parser.h
+++ b/include/spdk/trace_parser.h
@@ -83,6 +83,15 @@ struct spdk_trace_parser *spdk_trace_parser_init(const struct spdk_trace_parser_
  */
 void spdk_trace_parser_cleanup(struct spdk_trace_parser *parser);
 
+/**
+ * Return trace flags describing the traces.
+ *
+ * \param parser Parser object to be used.
+ *
+ * \return Pointer to the trace flags.
+ */
+const struct spdk_trace_flags *spdk_trace_parser_get_flags(const struct spdk_trace_parser *parser);
+
 #ifdef __cplusplus
 }
 #endif
diff --git a/lib/trace_parser/spdk_trace_parser.map b/lib/trace_parser/spdk_trace_parser.map
index 1f1c1c5696..ae58db77a5 100644
--- a/lib/trace_parser/spdk_trace_parser.map
+++ b/lib/trace_parser/spdk_trace_parser.map
@@ -4,6 +4,7 @@
 	# public functions
 	spdk_trace_parser_init;
 	spdk_trace_parser_cleanup;
+	spdk_trace_parser_get_flags;
 
 	local: *;
 };
diff --git a/lib/trace_parser/trace.cpp b/lib/trace_parser/trace.cpp
index 8874b4770e..2986ee4255 100644
--- a/lib/trace_parser/trace.cpp
+++ b/lib/trace_parser/trace.cpp
@@ -34,6 +34,7 @@
 #include "spdk/stdinc.h"
 #include "spdk/log.h"
 #include "spdk/trace_parser.h"
+#include "spdk/util.h"
 
 #include <exception>
 #include <new>
@@ -43,6 +44,7 @@ struct spdk_trace_parser {
 	~spdk_trace_parser();
 	spdk_trace_parser(const spdk_trace_parser &) = delete;
 	spdk_trace_parser &operator=(const spdk_trace_parser &) = delete;
+	const spdk_trace_flags *flags() const { return &_histories->flags; }
 private:
 	bool init(const spdk_trace_parser_opts *opts);
 	void cleanup();
@@ -158,3 +160,9 @@ spdk_trace_parser_cleanup(struct spdk_trace_parser *parser)
 {
 	delete parser;
 }
+
+const struct spdk_trace_flags *
+spdk_trace_parser_get_flags(const struct spdk_trace_parser *parser)
+{
+	return parser->flags();
+}