tracing: Implement event pid filtering

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

diff --git a/include/linux/trace_events.h b/include/linux/trace_events.h
index f85693b..429fdfc 100644 (file)
--- a/include/linux/trace_events.h
+++ b/include/linux/trace_events.h
@@ -328,6 +328,7 @@ enum {
        EVENT_FILE_FL_SOFT_DISABLED_BIT,
        EVENT_FILE_FL_TRIGGER_MODE_BIT,
        EVENT_FILE_FL_TRIGGER_COND_BIT,
+       EVENT_FILE_FL_PID_FILTER_BIT,
 };
 
 /*
@@ -341,6 +342,7 @@ enum {
  *                   tracepoint may be enabled)
  *  TRIGGER_MODE  - When set, invoke the triggers associated with the event
  *  TRIGGER_COND  - When set, one or more triggers has an associated filter
+ *  PID_FILTER    - When set, the event is filtered based on pid
  */
 enum {
        EVENT_FILE_FL_ENABLED           = (1 << EVENT_FILE_FL_ENABLED_BIT),
@@ -351,6 +353,7 @@ enum {
        EVENT_FILE_FL_SOFT_DISABLED     = (1 << EVENT_FILE_FL_SOFT_DISABLED_BIT),
        EVENT_FILE_FL_TRIGGER_MODE      = (1 << EVENT_FILE_FL_TRIGGER_MODE_BIT),
        EVENT_FILE_FL_TRIGGER_COND      = (1 << EVENT_FILE_FL_TRIGGER_COND_BIT),
+       EVENT_FILE_FL_PID_FILTER        = (1 << EVENT_FILE_FL_PID_FILTER_BIT),
 };
 
 struct trace_event_file {
@@ -429,6 +432,8 @@ extern enum event_trigger_type event_triggers_call(struct trace_event_file *file
 extern void event_triggers_post_call(struct trace_event_file *file,
                                     enum event_trigger_type tt);
 
+bool trace_event_ignore_this_pid(struct trace_event_file *trace_file);
+
 /**
  * trace_trigger_soft_disabled - do triggers and test if soft disabled
  * @file: The file pointer of the event to test
@@ -448,6 +453,8 @@ trace_trigger_soft_disabled(struct trace_event_file *file)
                        event_triggers_call(file, NULL);
                if (eflags & EVENT_FILE_FL_SOFT_DISABLED)
                        return true;
+               if (eflags & EVENT_FILE_FL_PID_FILTER)
+                       return trace_event_ignore_this_pid(file);
        }
        return false;
 }