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1c8284eb MD |
1 | /* |
2 | * Copyright (C) 2005,2006 Mathieu Desnoyers (mathieu.desnoyers@polymtl.ca) | |
3 | * | |
4 | * This contains the core definitions for the Linux Trace Toolkit. | |
5 | * | |
6 | * Dual LGPL v2.1/GPL v2 license. | |
7 | */ | |
8 | ||
9 | #ifndef LTT_TRACER_CORE_H | |
10 | #define LTT_TRACER_CORE_H | |
11 | ||
12 | #include <linux/list.h> | |
13 | #include <linux/percpu.h> | |
14 | #include <linux/ltt-core.h> | |
15 | ||
16 | /* ltt's root dir in debugfs */ | |
17 | #define LTT_ROOT "ltt" | |
18 | ||
19 | /* | |
20 | * All modifications of ltt_traces must be done by ltt-tracer.c, while holding | |
21 | * the semaphore. Only reading of this information can be done elsewhere, with | |
22 | * the RCU mechanism : the preemption must be disabled while reading the | |
23 | * list. | |
24 | */ | |
25 | struct ltt_traces { | |
26 | struct list_head setup_head; /* Pre-allocated traces list */ | |
27 | struct list_head head; /* Allocated Traces list */ | |
28 | unsigned int num_active_traces; /* Number of active traces */ | |
29 | } ____cacheline_aligned; | |
30 | ||
31 | extern struct ltt_traces ltt_traces; | |
32 | ||
33 | /* | |
34 | * get dentry of ltt's root dir | |
35 | */ | |
36 | struct dentry *get_ltt_root(void); | |
37 | ||
38 | void put_ltt_root(void); | |
39 | ||
40 | /* Keep track of trap nesting inside LTT */ | |
41 | DECLARE_PER_CPU(unsigned int, ltt_nesting); | |
42 | ||
43 | typedef int (*ltt_run_filter_functor)(void *trace, uint16_t eID); | |
44 | ||
45 | extern ltt_run_filter_functor ltt_run_filter; | |
46 | ||
47 | extern void ltt_filter_register(ltt_run_filter_functor func); | |
48 | extern void ltt_filter_unregister(void); | |
49 | ||
50 | #endif /* LTT_TRACER_CORE_H */ |