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_data(file))) {
221 	if ((file->f_mode & FMODE_WRITE) &&
222 	    (file->f_flags & O_TRUNC)) {
226 		event_file = event_file_data(file);
234 	if (file->f_mode & FMODE_READ) {
235 		ret = seq_open(file, &event_triggers_seq_ops);
237 			struct seq_file *m = file->private_data;
238 			m->private = file;
247 int trigger_process_regex(struct trace_event_file *file, char *buff)
265 			ret = p->parse(p, file, buff, command, next);
275 static ssize_t event_trigger_regex_write(struct file *file,
296 	event_file = event_file_data(file);
315 static int event_trigger_regex_release(struct inode *inode, struct file *file)
319 	if (file->f_mode & FMODE_READ)
320 		seq_release(inode, file);
328 event_trigger_write(struct file *filp, const char __user *ubuf,
335 event_trigger_open(struct inode *inode, struct file *filp)
342 event_trigger_release(struct inode *inode, struct file *file)
344 	return event_trigger_regex_release(inode, file);
473 int trace_event_trigger_enable_disable(struct trace_event_file *file,
479 		if (atomic_inc_return(&file->tm_ref) > 1)
481 		set_bit(EVENT_FILE_FL_TRIGGER_MODE_BIT, &file->flags);
482 		ret = trace_event_enable_disable(file, 1, 1);
484 		if (atomic_dec_return(&file->tm_ref) > 0)
486 		clear_bit(EVENT_FILE_FL_TRIGGER_MODE_BIT, &file->flags);
487 		ret = trace_event_enable_disable(file, 0, 1);
509 	struct trace_event_file *file;
511 	list_for_each_entry(file, &tr->events, list) {
513 		list_for_each_entry_safe(data, n, &file->triggers, list) {
514 			trace_event_trigger_enable_disable(file, 0);
524  * @file: The trace_event_file associated with the event
532 void update_cond_flag(struct trace_event_file *file)
539 	list_for_each_entry(data, &file->triggers, list) {
548 		set_bit(EVENT_FILE_FL_TRIGGER_COND_BIT, &file->flags);
550 		clear_bit(EVENT_FILE_FL_TRIGGER_COND_BIT, &file->flags);
557  * @file: The trace_event_file associated with the event
568 			    struct trace_event_file *file)
575 	list_for_each_entry(test, &file->triggers, list) {
588 	list_add_rcu(&data->list, &file->triggers);
590 	update_cond_flag(file);
591 	ret = trace_event_trigger_enable_disable(file, 1);
594 		update_cond_flag(file);
605 				   struct trace_event_file *file)
611 	list_for_each_entry(iter, &file->triggers, list) {
615 			trace_event_trigger_enable_disable(file, 0);
616 			update_cond_flag(file);
635  * @file: The trace_event_file associated with the event
644 			       struct trace_event_file *file)
646 	try_unregister_trigger(glob, test, file);
655  * written to the 'trigger' file.
904  * @file: The event file for the trigger's event
914 			     struct trace_event_file *file,
919 		return cmd_ops->set_filter(param, trigger_data, file);
941  * @file: The event file for the trigger's event
951 			   struct trace_event_file *file,
955 	return cmd_ops->reg(glob, trigger_data, file);
961  * @file: The event file for the trigger's event
969 			      struct trace_event_file *file,
973 	cmd_ops->unreg(glob, trigger_data, file);
983  * @file: The trace_event_file associated with the event
998 		    struct trace_event_file *file,
1013 	trigger_data = event_trigger_alloc(cmd_ops, cmd, param, file);
1018 		event_trigger_unregister(cmd_ops, file, glob+1, trigger_data);
1028 	ret = event_trigger_set_filter(cmd_ops, file, filter, trigger_data);
1035 	ret = event_trigger_register(cmd_ops, file, glob, trigger_data);
1054  * @file: The trace_event_file associated with the event
1068 		       struct trace_event_file *file)
1087 	ret = create_event_filter(file->tr, file->event_call,
1286 	struct trace_event_file *file = data->private_data;
1288 	if (file) {
1289 		if (tracer_tracing_is_on(file->tr))
1292 		tracer_tracing_on(file->tr);
1307 	struct trace_event_file *file = data->private_data;
1309 	if (file) {
1310 		if (tracer_tracing_is_on(file->tr))
1323 	if (file)
1324 		tracer_tracing_on(file->tr);
1334 	struct trace_event_file *file = data->private_data;
1336 	if (file) {
1337 		if (!tracer_tracing_is_on(file->tr))
1340 		tracer_tracing_off(file->tr);
1355 	struct trace_event_file *file = data->private_data;
1357 	if (file) {
1358 		if (!tracer_tracing_is_on(file->tr))
1371 	if (file)
1372 		tracer_tracing_off(file->tr);
1462 	struct trace_event_file *file = data->private_data;
1464 	if (file)
1465 		tracing_snapshot_instance(file->tr);
1487 			  struct trace_event_file *file)
1489 	int ret = tracing_arm_snapshot(file->tr);
1494 	ret = register_trigger(glob, data, file);
1496 		tracing_disarm_snapshot(file->tr);
1502 					struct trace_event_file *file)
1504 	if (try_unregister_trigger(glob, data, file))
1505 		tracing_disarm_snapshot(file->tr);
1581 	struct trace_event_file *file = data->private_data;
1583 	if (file)
1584 		__trace_stack(file->tr, tracing_gen_ctx(), STACK_SKIP);
1668 		clear_bit(EVENT_FILE_FL_SOFT_DISABLED_BIT, &enable_data->file->flags);
1670 		set_bit(EVENT_FILE_FL_SOFT_DISABLED_BIT, &enable_data->file->flags);
1684 	if (enable_data->enable == !(enable_data->file->flags & EVENT_FILE_FL_SOFT_DISABLED))
1702 		   enable_data->file->event_call->class->system,
1703 		   trace_event_name(enable_data->file->event_call));
1728 		trace_event_enable_disable(enable_data->file, 0, 1);
1729 		trace_event_put_ref(enable_data->file->event_call);
1764 			       struct trace_event_file *file,
1770 	struct trace_array *tr = file->tr;
1815 	enable_data->file = event_enable_file;
1824 		event_trigger_unregister(cmd_ops, file, glob+1, trigger_data);
1838 	ret = event_trigger_set_filter(cmd_ops, file, filter, trigger_data);
1853 	ret = event_trigger_register(cmd_ops, file, glob, trigger_data);
1874 				  struct trace_event_file *file)
1883 	list_for_each_entry(test, &file->triggers, list) {
1888 		    (test_enable_data->file == enable_data->file)) {
1900 	list_add_rcu(&data->list, &file->triggers);
1902 	update_cond_flag(file);
1903 	ret = trace_event_trigger_enable_disable(file, 1);
1906 		update_cond_flag(file);
1914 				     struct trace_event_file *file)
1922 	list_for_each_entry(iter, &file->triggers, list) {
1927 		    (enable_data->file == test_enable_data->file)) {
1930 			trace_event_trigger_enable_disable(file, 0);
1931 			update_cond_flag(file);