tracing: add TRACE_EVENT_MAP

[deliverable/linux.git] / include / linux / trace_events.h

diff --git a/include/linux/trace_events.h b/include/linux/trace_events.h
index be007610ceb08aaa7cad1073effe73b24adff66d..1f7e0ec3bbf62376a907964869547d9ecb7968d2 100644 (file)
--- a/include/linux/trace_events.h
+++ b/include/linux/trace_events.h
@@ -217,6 +217,7 @@ enum {
        TRACE_EVENT_FL_TRACEPOINT_BIT,
        TRACE_EVENT_FL_KPROBE_BIT,
        TRACE_EVENT_FL_UPROBE_BIT,
+       TRACE_EVENT_FL_MAP_BIT,
 };
 
 /*
@@ -231,6 +232,7 @@ enum {
  *  TRACEPOINT    - Event is a tracepoint
  *  KPROBE        - Event is a kprobe
  *  UPROBE        - Event is a uprobe
+ *  MAP           - Event maps to a tracepoint as an alias
  */
 enum {
        TRACE_EVENT_FL_FILTERED         = (1 << TRACE_EVENT_FL_FILTERED_BIT),
@@ -241,10 +243,16 @@ enum {
        TRACE_EVENT_FL_TRACEPOINT       = (1 << TRACE_EVENT_FL_TRACEPOINT_BIT),
        TRACE_EVENT_FL_KPROBE           = (1 << TRACE_EVENT_FL_KPROBE_BIT),
        TRACE_EVENT_FL_UPROBE           = (1 << TRACE_EVENT_FL_UPROBE_BIT),
+       TRACE_EVENT_FL_MAP              = (1 << TRACE_EVENT_FL_MAP_BIT),
 };
 
 #define TRACE_EVENT_FL_UKPROBE (TRACE_EVENT_FL_KPROBE | TRACE_EVENT_FL_UPROBE)
 
+struct trace_event_map {
+       struct tracepoint       *tp;
+       char                    *name;
+};
+
 struct trace_event_call {
        struct list_head        list;
        struct trace_event_class *class;
@@ -252,6 +260,8 @@ struct trace_event_call {
                char                    *name;
                /* Set TRACE_EVENT_FL_TRACEPOINT flag when using "tp" */
                struct tracepoint       *tp;
+               /* Set TRACE_EVENT_FL_MAP flag when using "map" instead */
+               struct trace_event_map  *map;
        };
        struct trace_event      event;
        char                    *print_fmt;
@@ -282,7 +292,9 @@ struct trace_event_call {
 static inline const char *
 trace_event_name(struct trace_event_call *call)
 {
-       if (call->flags & TRACE_EVENT_FL_TRACEPOINT)
+       if (call->flags & TRACE_EVENT_FL_MAP)
+               return call->map->name;
+       else if (call->flags & TRACE_EVENT_FL_TRACEPOINT)
                return call->tp ? call->tp->name : NULL;
        else
                return call->name;