ltt-core.c

   1 /*
   2  * LTT core in-kernel infrastructure.
   3  *
   4  * Copyright 2006 - Mathieu Desnoyers mathieu.desnoyers@polymtl.ca
   5  *
   6  * Dual LGPL v2.1/GPL v2 license.
   7  */
   8
   9 #include <linux/percpu.h>
  10 #include <linux/module.h>
  11 #include <linux/debugfs.h>
  12 #include <linux/kref.h>
  13 #include <linux/cpu.h>
  14
  15 #include "ltt-tracer-core.h"
  16
  17 int ltt_run_filter_default(struct ltt_session *session,
  18                            struct ltt_channel *chan,
  19                            struct ltt_event *event)
  20 {
  21         return 1;
  22 }
  23
  24 /* This function pointer is protected by a trace activation check */
  25 ltt_run_filter_functor ltt_run_filter = ltt_run_filter_default;
  26 EXPORT_SYMBOL_GPL(ltt_run_filter);
  27
  28 void ltt_filter_register(ltt_run_filter_functor func)
  29 {
  30         ltt_run_filter = func;
  31 }
  32 EXPORT_SYMBOL_GPL(ltt_filter_register);
  33
  34 void ltt_filter_unregister(void)
  35 {
  36         ltt_run_filter = ltt_run_filter_default;
  37 }
  38 EXPORT_SYMBOL_GPL(ltt_filter_unregister);
  39
  40 MODULE_LICENSE("GPL and additional rights");
  41 MODULE_AUTHOR("Mathieu Desnoyers");
  42 MODULE_DESCRIPTION("Linux Trace Toolkit Next Generation Tracer Core");