47 static void __reset_stat_session(struct stat_session *session)  in __reset_stat_session()  argument
51 	rbtree_postorder_for_each_entry_safe(snode, n, &session->stat_root, node) {  in __reset_stat_session()
52 		if (session->ts->stat_release)  in __reset_stat_session()
53 			session->ts->stat_release(snode->stat);  in __reset_stat_session()
57 	session->stat_root = RB_ROOT;  in __reset_stat_session()
60 static void reset_stat_session(struct stat_session *session)  in reset_stat_session()  argument
62 	mutex_lock(&session->stat_mutex);  in reset_stat_session()
63 	__reset_stat_session(session);  in reset_stat_session()
64 	mutex_unlock(&session->stat_mutex);  in reset_stat_session()
67 static void destroy_session(struct stat_session *session)  in destroy_session()  argument
69 	tracefs_remove(session->file);  in destroy_session()
70 	__reset_stat_session(session);  in destroy_session()
71 	mutex_destroy(&session->stat_mutex);  in destroy_session()
72 	kfree(session);  in destroy_session()
123 static int stat_seq_init(struct stat_session *session)  in stat_seq_init()  argument
125 	struct tracer_stat *ts = session->ts;  in stat_seq_init()
126 	struct rb_root *root = &session->stat_root;  in stat_seq_init()
131 	guard(mutex)(&session->stat_mutex);  in stat_seq_init()
132 	__reset_stat_session(session);  in stat_seq_init()
163 	__reset_stat_session(session);  in stat_seq_init()
170 	struct stat_session *session = s->private;  in stat_seq_start()  local
176 	mutex_lock(&session->stat_mutex);  in stat_seq_start()
179 	if (session->ts->stat_headers) {  in stat_seq_start()
185 	node = rb_first(&session->stat_root);  in stat_seq_start()
194 	struct stat_session *session = s->private;  in stat_seq_next()  local
200 		return rb_first(&session->stat_root);  in stat_seq_next()
207 	struct stat_session *session = s->private;  in stat_seq_stop()  local
208 	mutex_unlock(&session->stat_mutex);  in stat_seq_stop()
213 	struct stat_session *session = s->private;  in stat_seq_show()  local
217 		return session->ts->stat_headers(s);  in stat_seq_show()
219 	return session->ts->stat_show(s, l->stat);  in stat_seq_show()
234 	struct stat_session *session = inode->i_private;  in tracing_stat_open()  local
240 	ret = stat_seq_init(session);  in tracing_stat_open()
246 		reset_stat_session(session);  in tracing_stat_open()
251 	m->private = session;  in tracing_stat_open()
260 	struct stat_session *session = i->i_private;  in tracing_stat_release()  local
262 	reset_stat_session(session);  in tracing_stat_release()
290 static int init_stat_file(struct stat_session *session)  in init_stat_file()  argument
297 	session->file = tracefs_create_file(session->ts->name, TRACE_MODE_WRITE,  in init_stat_file()
298 					    stat_dir, session,  in init_stat_file()
300 	if (!session->file)  in init_stat_file()
307 	struct stat_session *session, *node;  in register_stat_tracer()  local
325 	session = kzalloc(sizeof(*session), GFP_KERNEL);  in register_stat_tracer()
326 	if (!session)  in register_stat_tracer()
329 	session->ts = trace;  in register_stat_tracer()
330 	INIT_LIST_HEAD(&session->session_list);  in register_stat_tracer()
331 	mutex_init(&session->stat_mutex);  in register_stat_tracer()
333 	ret = init_stat_file(session);  in register_stat_tracer()
335 		destroy_session(session);  in register_stat_tracer()
340 	list_add_tail(&session->session_list, &all_stat_sessions);  in register_stat_tracer()