ftrace, perf: Add open/close tracepoint perf registration actions

Adding TRACE_REG_PERF_OPEN and TRACE_REG_PERF_CLOSE to differentiate
register/unregister from open/close actions.

The register/unregister actions are invoked for the first/last
tracepoint user when opening/closing the event.

The open/close actions are invoked for each tracepoint user when
opening/closing the event.

Link: http://lkml.kernel.org/r/1329317514-8131-3-git-send-email-jolsa@redhat.com

Acked-by: Frederic Weisbecker <fweisbec@gmail.com>
Signed-off-by: Jiri Olsa <jolsa@redhat.com>
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>

1 files changed, 4 insertions, 2 deletions

diff --git a/include/linux/ftrace_event.h b/include/linux/ftrace_event.h
index c3da42dd22ba..195e3606ddd7 100644
--- a/include/linux/ftrace_event.h
+++ b/include/linux/ftrace_event.h
@@ -146,6 +146,8 @@ enum trace_reg {
         TRACE_REG_UNREGISTER,
         TRACE_REG_PERF_REGISTER,
         TRACE_REG_PERF_UNREGISTER,
+        TRACE_REG_PERF_OPEN,
+        TRACE_REG_PERF_CLOSE,
 };
 
 struct ftrace_event_call;
@@ -157,7 +159,7 @@ struct ftrace_event_class {
         void                    *perf_probe;
 #endif
         int                     (*reg)(struct ftrace_event_call *event,
-                                       enum trace_reg type);
+                                       enum trace_reg type, void *data);
         int                     (*define_fields)(struct ftrace_event_call *);
         struct list_head        *(*get_fields)(struct ftrace_event_call *);
         struct list_head        fields;
@@ -165,7 +167,7 @@ struct ftrace_event_class {
 };
 
 extern int ftrace_event_reg(struct ftrace_event_call *event,
-                            enum trace_reg type);
+                            enum trace_reg type, void *data);
 
 enum {
         TRACE_EVENT_FL_ENABLED_BIT,