trace_events.c (490b929d42d2a321887f9538a83fc9f215675f15) trace_events.c (85f2b08268c014e290b600ba49fa85530600eaa1)
1/*
2 * event tracer
3 *
4 * Copyright (C) 2008 Red Hat Inc, Steven Rostedt <srostedt@redhat.com>
5 *
6 * - Added format output of fields of the trace point.
7 * This was based off of work by Tom Zanussi <tzanussi@gmail.com>.
8 *

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337 call->flags |= TRACE_EVENT_FL_WAS_ENABLED;
338 }
339 break;
340 }
341
342 return ret;
343}
344
1/*
2 * event tracer
3 *
4 * Copyright (C) 2008 Red Hat Inc, Steven Rostedt <srostedt@redhat.com>
5 *
6 * - Added format output of fields of the trace point.
7 * This was based off of work by Tom Zanussi <tzanussi@gmail.com>.
8 *

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337 call->flags |= TRACE_EVENT_FL_WAS_ENABLED;
338 }
339 break;
340 }
341
342 return ret;
343}
344
345int trace_event_enable_disable(struct ftrace_event_file *file,
346 int enable, int soft_disable)
347{
348 return __ftrace_event_enable_disable(file, enable, soft_disable);
349}
350
345static int ftrace_event_enable_disable(struct ftrace_event_file *file,
346 int enable)
347{
348 return __ftrace_event_enable_disable(file, enable, 0);
349}
350
351static void ftrace_clear_events(struct trace_array *tr)
352{

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416
417 if (!--dir->nr_events) {
418 debugfs_remove_recursive(dir->entry);
419 list_del(&dir->list);
420 __put_system_dir(dir);
421 }
422}
423
351static int ftrace_event_enable_disable(struct ftrace_event_file *file,
352 int enable)
353{
354 return __ftrace_event_enable_disable(file, enable, 0);
355}
356
357static void ftrace_clear_events(struct trace_array *tr)
358{

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422
423 if (!--dir->nr_events) {
424 debugfs_remove_recursive(dir->entry);
425 list_del(&dir->list);
426 __put_system_dir(dir);
427 }
428}
429
424static void *event_file_data(struct file *filp)
425{
426 return ACCESS_ONCE(file_inode(filp)->i_private);
427}
428
429static void remove_event_file_dir(struct ftrace_event_file *file)
430{
431 struct dentry *dir = file->dir;
432 struct dentry *child;
433
434 if (dir) {
435 spin_lock(&dir->d_lock); /* probably unneeded */
436 list_for_each_entry(child, &dir->d_subdirs, d_u.d_child) {

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1544 pr_warning("Could not initialize trace point"
1545 " events/%s\n", call->name);
1546 return -1;
1547 }
1548 }
1549 trace_create_file("filter", 0644, file->dir, file,
1550 &ftrace_event_filter_fops);
1551
430static void remove_event_file_dir(struct ftrace_event_file *file)
431{
432 struct dentry *dir = file->dir;
433 struct dentry *child;
434
435 if (dir) {
436 spin_lock(&dir->d_lock); /* probably unneeded */
437 list_for_each_entry(child, &dir->d_subdirs, d_u.d_child) {

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1545 pr_warning("Could not initialize trace point"
1546 " events/%s\n", call->name);
1547 return -1;
1548 }
1549 }
1550 trace_create_file("filter", 0644, file->dir, file,
1551 &ftrace_event_filter_fops);
1552
1553 trace_create_file("trigger", 0644, file->dir, file,
1554 &event_trigger_fops);
1555
1552 trace_create_file("format", 0444, file->dir, call,
1553 &ftrace_event_format_fops);
1554
1555 return 0;
1556}
1557
1558static void remove_event_from_tracers(struct ftrace_event_call *call)
1559{

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1640
1641 file = kmem_cache_alloc(file_cachep, GFP_TRACE);
1642 if (!file)
1643 return NULL;
1644
1645 file->event_call = call;
1646 file->tr = tr;
1647 atomic_set(&file->sm_ref, 0);
1556 trace_create_file("format", 0444, file->dir, call,
1557 &ftrace_event_format_fops);
1558
1559 return 0;
1560}
1561
1562static void remove_event_from_tracers(struct ftrace_event_call *call)
1563{

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1644
1645 file = kmem_cache_alloc(file_cachep, GFP_TRACE);
1646 if (!file)
1647 return NULL;
1648
1649 file->event_call = call;
1650 file->tr = tr;
1651 atomic_set(&file->sm_ref, 0);
1652 atomic_set(&file->tm_ref, 0);
1653 INIT_LIST_HEAD(&file->triggers);
1648 list_add(&file->list, &tr->events);
1649
1650 return file;
1651}
1652
1653/* Add an event to a trace directory */
1654static int
1655__trace_add_new_event(struct ftrace_event_call *call, struct trace_array *tr)

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2306
2307 return ret;
2308}
2309
2310int event_trace_del_tracer(struct trace_array *tr)
2311{
2312 mutex_lock(&event_mutex);
2313
1654 list_add(&file->list, &tr->events);
1655
1656 return file;
1657}
1658
1659/* Add an event to a trace directory */
1660static int
1661__trace_add_new_event(struct ftrace_event_call *call, struct trace_array *tr)

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2312
2313 return ret;
2314}
2315
2316int event_trace_del_tracer(struct trace_array *tr)
2317{
2318 mutex_lock(&event_mutex);
2319
2320 /* Disable any event triggers and associated soft-disabled events */
2321 clear_event_triggers(tr);
2322
2314 /* Disable any running events */
2315 __ftrace_set_clr_event_nolock(tr, NULL, NULL, NULL, 0);
2316
2317 /* Access to events are within rcu_read_lock_sched() */
2318 synchronize_sched();
2319
2320 down_write(&trace_event_sem);
2321 __trace_remove_event_dirs(tr);

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2372 if (ret)
2373 pr_warn("Failed to enable trace event: %s\n", token);
2374 }
2375
2376 trace_printk_start_comm();
2377
2378 register_event_cmds();
2379
2323 /* Disable any running events */
2324 __ftrace_set_clr_event_nolock(tr, NULL, NULL, NULL, 0);
2325
2326 /* Access to events are within rcu_read_lock_sched() */
2327 synchronize_sched();
2328
2329 down_write(&trace_event_sem);
2330 __trace_remove_event_dirs(tr);

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2381 if (ret)
2382 pr_warn("Failed to enable trace event: %s\n", token);
2383 }
2384
2385 trace_printk_start_comm();
2386
2387 register_event_cmds();
2388
2389 register_trigger_cmds();
2390
2380 return 0;
2381}
2382
2383static __init int event_trace_init(void)
2384{
2385 struct trace_array *tr;
2386 struct dentry *d_tracer;
2387 struct dentry *entry;

--- 273 unchanged lines hidden --- 		2391 return 0;
2392}
2393
2394static __init int event_trace_init(void)
2395{
2396 struct trace_array *tr;
2397 struct dentry *d_tracer;
2398 struct dentry *entry;

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