kernel/trace/trace_events_trigger.c

33  * @file: The trace_event_file associated with the event
58 event_triggers_call(struct trace_event_file *file,
66 	if (list_empty(&file->triggers))
69 	list_for_each_entry_rcu(data, &file->triggers, list) {
89 bool __trace_trigger_soft_disabled(struct trace_event_file *file)
91 	unsigned long eflags = file->flags;
94 		event_triggers_call(file, NULL, NULL, NULL);
98 		return trace_event_ignore_this_pid(file);
105  * @file: The trace_event_file associated with the event
116 event_triggers_post_call(struct trace_event_file *file,
121 	list_for_each_entry_rcu(data, &file->triggers, list) {
143 static bool check_user_trigger(struct trace_event_file *file)
147 	list_for_each_entry_rcu(data, &file->triggers, list,
206 static int event_trigger_regex_open(struct inode *inode, struct file *file)
216 	if (unlikely(!event_file_file(file)))
219 	if ((file->f_mode & FMODE_WRITE) &&
220 	    (file->f_flags & O_TRUNC)) {
224 		event_file = event_file_data(file);
232 	if (file->f_mode & FMODE_READ) {
233 		ret = seq_open(file, &event_triggers_seq_ops);
235 			struct seq_file *m = file->private_data;
236 			m->private = file;
243 int trigger_process_regex(struct trace_event_file *file, char *buff)
261 			return p->parse(p, file, buff, command, next);
267 static ssize_t event_trigger_regex_write(struct file *file,
289 	event_file = event_file_file(file);
301 static int event_trigger_regex_release(struct inode *inode, struct file *file)
305 	if (file->f_mode & FMODE_READ)
306 		seq_release(inode, file);
314 event_trigger_write(struct file *filp, const char __user *ubuf,
321 event_trigger_open(struct inode *inode, struct file *filp)
328 event_trigger_release(struct inode *inode, struct file *file)
330 	return event_trigger_regex_release(inode, file);
452 int trace_event_trigger_enable_disable(struct trace_event_file *file,
458 		if (atomic_inc_return(&file->tm_ref) > 1)
460 		set_bit(EVENT_FILE_FL_TRIGGER_MODE_BIT, &file->flags);
461 		ret = trace_event_enable_disable(file, 1, 1);
463 		if (atomic_dec_return(&file->tm_ref) > 0)
465 		clear_bit(EVENT_FILE_FL_TRIGGER_MODE_BIT, &file->flags);
466 		ret = trace_event_enable_disable(file, 0, 1);
488 	struct trace_event_file *file;
490 	list_for_each_entry(file, &tr->events, list) {
492 		list_for_each_entry_safe(data, n, &file->triggers, list) {
493 			trace_event_trigger_enable_disable(file, 0);
503  * @file: The trace_event_file associated with the event
511 void update_cond_flag(struct trace_event_file *file)
518 	list_for_each_entry(data, &file->triggers, list) {
527 		set_bit(EVENT_FILE_FL_TRIGGER_COND_BIT, &file->flags);
529 		clear_bit(EVENT_FILE_FL_TRIGGER_COND_BIT, &file->flags);
536  * @file: The trace_event_file associated with the event
547 			    struct trace_event_file *file)
554 	list_for_each_entry(test, &file->triggers, list) {
565 	list_add_rcu(&data->list, &file->triggers);
567 	update_cond_flag(file);
568 	ret = trace_event_trigger_enable_disable(file, 1);
571 		update_cond_flag(file);
581 				   struct trace_event_file *file)
587 	list_for_each_entry(iter, &file->triggers, list) {
591 			trace_event_trigger_enable_disable(file, 0);
592 			update_cond_flag(file);
611  * @file: The trace_event_file associated with the event
620 			       struct trace_event_file *file)
622 	try_unregister_trigger(glob, test, file);
631  * written to the 'trigger' file.
879  * @file: The event file for the trigger's event
889 			     struct trace_event_file *file,
894 		return cmd_ops->set_filter(param, trigger_data, file);
916  * @file: The event file for the trigger's event
926 			   struct trace_event_file *file,
930 	return cmd_ops->reg(glob, trigger_data, file);
936  * @file: The event file for the trigger's event
944 			      struct trace_event_file *file,
948 	cmd_ops->unreg(glob, trigger_data, file);
958  * @file: The trace_event_file associated with the event
973 		    struct trace_event_file *file,
988 	trigger_data = trigger_data_alloc(cmd_ops, cmd, param, file);
993 		event_trigger_unregister(cmd_ops, file, glob+1, trigger_data);
1002 	ret = event_trigger_set_filter(cmd_ops, file, filter, trigger_data);
1009 	ret = event_trigger_register(cmd_ops, file, glob, trigger_data);
1027  * @file: The trace_event_file associated with the event
1041 		       struct trace_event_file *file)
1060 	ret = create_event_filter(file->tr, file->event_call,
1258 	struct trace_event_file *file = data->private_data;
1260 	if (file) {
1261 		if (tracer_tracing_is_on(file->tr))
1264 		tracer_tracing_on(file->tr);
1279 	struct trace_event_file *file = data->private_data;
1281 	if (file) {
1282 		if (tracer_tracing_is_on(file->tr))
1295 	if (file)
1296 		tracer_tracing_on(file->tr);
1306 	struct trace_event_file *file = data->private_data;
1308 	if (file) {
1309 		if (!tracer_tracing_is_on(file->tr))
1312 		tracer_tracing_off(file->tr);
1327 	struct trace_event_file *file = data->private_data;
1329 	if (file) {
1330 		if (!tracer_tracing_is_on(file->tr))
1343 	if (file)
1344 		tracer_tracing_off(file->tr);
1434 	struct trace_event_file *file = data->private_data;
1436 	if (file)
1437 		tracing_snapshot_instance(file->tr);
1459 			  struct trace_event_file *file)
1461 	int ret = tracing_arm_snapshot(file->tr);
1466 	ret = register_trigger(glob, data, file);
1468 		tracing_disarm_snapshot(file->tr);
1474 					struct trace_event_file *file)
1476 	if (try_unregister_trigger(glob, data, file))
1477 		tracing_disarm_snapshot(file->tr);
1553 	struct trace_event_file *file = data->private_data;
1555 	if (file)
1556 		__trace_stack(file->tr, tracing_gen_ctx_dec(), STACK_SKIP);
1640 		clear_bit(EVENT_FILE_FL_SOFT_DISABLED_BIT, &enable_data->file->flags);
1642 		set_bit(EVENT_FILE_FL_SOFT_DISABLED_BIT, &enable_data->file->flags);
1656 	if (enable_data->enable == !(enable_data->file->flags & EVENT_FILE_FL_SOFT_DISABLED))
1674 		   enable_data->file->event_call->class->system,
1675 		   trace_event_name(enable_data->file->event_call));
1700 		trace_event_enable_disable(enable_data->file, 0, 1);
1701 		trace_event_put_ref(enable_data->file->event_call);
1736 			       struct trace_event_file *file,
1742 	struct trace_array *tr = file->tr;
1787 	enable_data->file = event_enable_file;
1796 		event_trigger_unregister(cmd_ops, file, glob+1, trigger_data);
1810 	ret = event_trigger_set_filter(cmd_ops, file, filter, trigger_data);
1825 	ret = event_trigger_register(cmd_ops, file, glob, trigger_data);
1845 				  struct trace_event_file *file)
1854 	list_for_each_entry(test, &file->triggers, list) {
1859 		    (test_enable_data->file == enable_data->file)) {
1870 	list_add_rcu(&data->list, &file->triggers);
1872 	update_cond_flag(file);
1873 	ret = trace_event_trigger_enable_disable(file, 1);
1876 		update_cond_flag(file);
1883 				     struct trace_event_file *file)
1891 	list_for_each_entry(iter, &file->triggers, list) {
1896 		    (enable_data->file == test_enable_data->file)) {
1899 			trace_event_trigger_enable_disable(file, 0);
1900 			update_cond_flag(file);