| 1 | /* |
| 2 | * LTT core in-kernel infrastructure. |
| 3 | * |
| 4 | * Copyright 2006 - Mathieu Desnoyers mathieu.desnoyers@polymtl.ca |
| 5 | * |
| 6 | * Distributed under the GPL license |
| 7 | */ |
| 8 | |
| 9 | //ust// #include <linux/ltt-core.h> |
| 10 | //ust// #include <linux/percpu.h> |
| 11 | //ust// #include <linux/module.h> |
| 12 | //ust// #include <linux/debugfs.h> |
| 13 | #include "kernelcompat.h" |
| 14 | #include "tracercore.h" |
| 15 | |
| 16 | /* Traces structures */ |
| 17 | struct ltt_traces ltt_traces = { |
| 18 | .setup_head = LIST_HEAD_INIT(ltt_traces.setup_head), |
| 19 | .head = LIST_HEAD_INIT(ltt_traces.head), |
| 20 | }; |
| 21 | //ust// EXPORT_SYMBOL(ltt_traces); |
| 22 | |
| 23 | /* Traces list writer locking */ |
| 24 | static DEFINE_MUTEX(ltt_traces_mutex); |
| 25 | |
| 26 | /* dentry of ltt's root dir */ |
| 27 | //ust// static struct dentry *ltt_root_dentry; |
| 28 | //ust// struct dentry *get_ltt_root(void) |
| 29 | //ust// { |
| 30 | //ust// if (!ltt_root_dentry) { |
| 31 | //ust// ltt_root_dentry = debugfs_create_dir(LTT_ROOT, NULL); |
| 32 | //ust// if (!ltt_root_dentry) |
| 33 | //ust// printk(KERN_ERR "LTT : create ltt root dir failed\n"); |
| 34 | //ust// } |
| 35 | //ust// return ltt_root_dentry; |
| 36 | //ust// } |
| 37 | //ust// EXPORT_SYMBOL_GPL(get_ltt_root); |
| 38 | |
| 39 | void ltt_lock_traces(void) |
| 40 | { |
| 41 | mutex_lock(<t_traces_mutex); |
| 42 | } |
| 43 | //ust// EXPORT_SYMBOL_GPL(ltt_lock_traces); |
| 44 | |
| 45 | void ltt_unlock_traces(void) |
| 46 | { |
| 47 | mutex_unlock(<t_traces_mutex); |
| 48 | } |
| 49 | //ust// EXPORT_SYMBOL_GPL(ltt_unlock_traces); |
| 50 | |
| 51 | //ust// DEFINE_PER_CPU(unsigned int, ltt_nesting); |
| 52 | //ust// EXPORT_PER_CPU_SYMBOL(ltt_nesting); |
| 53 | unsigned int ltt_nesting; |
| 54 | |
| 55 | int ltt_run_filter_default(void *trace, uint16_t eID) |
| 56 | { |
| 57 | return 1; |
| 58 | } |
| 59 | |
| 60 | /* This function pointer is protected by a trace activation check */ |
| 61 | ltt_run_filter_functor ltt_run_filter = ltt_run_filter_default; |
| 62 | //ust// EXPORT_SYMBOL_GPL(ltt_run_filter); |
| 63 | |
| 64 | void ltt_filter_register(ltt_run_filter_functor func) |
| 65 | { |
| 66 | ltt_run_filter = func; |
| 67 | } |
| 68 | //ust// EXPORT_SYMBOL_GPL(ltt_filter_register); |
| 69 | |
| 70 | void ltt_filter_unregister(void) |
| 71 | { |
| 72 | ltt_run_filter = ltt_run_filter_default; |
| 73 | } |
| 74 | //ust// EXPORT_SYMBOL_GPL(ltt_filter_unregister); |