34  * @list: list head for child node list
37  * @parent: parent node
251  * Return a profiling data set associated with the given node. This is
255 static struct gcov_info *get_node_info(struct gcov_node *node)  in get_node_info()  argument
257 	if (node->num_loaded > 0)  in get_node_info()
258 		return node->loaded_info[0];  in get_node_info()
260 	return node->unloaded_info;  in get_node_info()
265  * all profiling data associated with the given node.
267 static struct gcov_info *get_accumulated_info(struct gcov_node *node)  in get_accumulated_info()  argument
272 	if (node->unloaded_info)  in get_accumulated_info()
273 		info = gcov_info_dup(node->unloaded_info);  in get_accumulated_info()
275 		info = gcov_info_dup(node->loaded_info[i++]);  in get_accumulated_info()
278 	for (; i < node->num_loaded; i++)  in get_accumulated_info()
279 		gcov_info_add(info, node->loaded_info[i]);  in get_accumulated_info()
290 	struct gcov_node *node = inode->i_private;  in gcov_seq_open()  local
300 	 * profiling data sets associated with one node simple.  in gcov_seq_open()
302 	info = get_accumulated_info(node);  in gcov_seq_open()
345  * Find a node by the associated data file name. Needs to be called with
350 	struct gcov_node *node;  in get_node_by_name()  local
353 	list_for_each_entry(node, &all_head, all) {  in get_node_by_name()
354 		info = get_node_info(node);  in get_node_by_name()
356 			return node;  in get_node_by_name()
363  * Reset all profiling data associated with the specified node.
365 static void reset_node(struct gcov_node *node)  in reset_node()  argument
369 	if (node->unloaded_info)  in reset_node()
370 		gcov_info_reset(node->unloaded_info);  in reset_node()
371 	for (i = 0; i < node->num_loaded; i++)  in reset_node()
372 		gcov_info_reset(node->loaded_info[i]);  in reset_node()
375 static void remove_node(struct gcov_node *node);
380  * remove the debug fs node as well.
387 	struct gcov_node *node;  in gcov_seq_write()  local
392 	node = get_node_by_name(gcov_info_filename(info));  in gcov_seq_write()
393 	if (node) {  in gcov_seq_write()
394 		/* Reset counts or remove node for unloaded modules. */  in gcov_seq_write()
395 		if (node->num_loaded == 0)  in gcov_seq_write()
396 			remove_node(node);  in gcov_seq_write()
398 			reset_node(node);  in gcov_seq_write()
476 static void add_links(struct gcov_node *node, struct dentry *parent)  in add_links()  argument
485 	node->links = kzalloc_objs(struct dentry *, num);  in add_links()
486 	if (!node->links)  in add_links()
490 				gcov_info_filename(get_node_info(node)),  in add_links()
497 		node->links[i] = debugfs_create_symlink(deskew(basename),  in add_links()
506 		debugfs_remove(node->links[i]);  in add_links()
507 	kfree(node->links);  in add_links()
508 	node->links = NULL;  in add_links()
519 /* Basic initialization of a new node. */
520 static void init_node(struct gcov_node *node, struct gcov_info *info,  in init_node()  argument
523 	INIT_LIST_HEAD(&node->list);  in init_node()
524 	INIT_LIST_HEAD(&node->children);  in init_node()
525 	INIT_LIST_HEAD(&node->all);  in init_node()
526 	if (node->loaded_info) {  in init_node()
527 		node->loaded_info[0] = info;  in init_node()
528 		node->num_loaded = 1;  in init_node()
530 	node->parent = parent;  in init_node()
532 		strcpy(node->name, name);  in init_node()
536  * Create a new node and associated debugfs entry. Needs to be called with
542 	struct gcov_node *node;  in new_node()  local
544 	node = kzalloc(sizeof(struct gcov_node) + strlen(name) + 1, GFP_KERNEL);  in new_node()
545 	if (!node)  in new_node()
548 		node->loaded_info = kzalloc_objs(struct gcov_info *, 1);  in new_node()
549 		if (!node->loaded_info)  in new_node()
552 	init_node(node, info, name, parent);  in new_node()
555 		node->dentry = debugfs_create_file(deskew(node->name), 0600,  in new_node()
556 					parent->dentry, node, &gcov_data_fops);  in new_node()
558 		node->dentry = debugfs_create_dir(node->name, parent->dentry);  in new_node()
560 		add_links(node, parent->dentry);  in new_node()
561 	list_add(&node->list, &parent->children);  in new_node()
562 	list_add(&node->all, &all_head);  in new_node()
564 	return node;  in new_node()
567 	kfree(node);  in new_node()
572 /* Remove symbolic links associated with node. */
573 static void remove_links(struct gcov_node *node)  in remove_links()  argument
577 	if (!node->links)  in remove_links()
580 		debugfs_remove(node->links[i]);  in remove_links()
581 	kfree(node->links);  in remove_links()
582 	node->links = NULL;  in remove_links()
586  * Remove node from all lists and debugfs and release associated resources.
589 static void release_node(struct gcov_node *node)  in release_node()  argument
591 	list_del(&node->list);  in release_node()
592 	list_del(&node->all);  in release_node()
593 	debugfs_remove(node->dentry);  in release_node()
594 	remove_links(node);  in release_node()
595 	kfree(node->loaded_info);  in release_node()
596 	if (node->unloaded_info)  in release_node()
597 		gcov_info_free(node->unloaded_info);  in release_node()
598 	kfree(node);  in release_node()
601 /* Release node and empty parents. Needs to be called with node_lock held. */
602 static void remove_node(struct gcov_node *node)  in remove_node()  argument
606 	while ((node != &root_node) && list_empty(&node->children)) {  in remove_node()
607 		parent = node->parent;  in remove_node()
608 		release_node(node);  in remove_node()
609 		node = parent;  in remove_node()
614  * Find child node with given basename. Needs to be called with node_lock
620 	struct gcov_node *node;  in get_child_by_name()  local
622 	list_for_each_entry(node, &parent->children, list) {  in get_child_by_name()
623 		if (strcmp(node->name, name) == 0)  in get_child_by_name()
624 			return node;  in get_child_by_name()
637 	struct gcov_node *node;  in reset_write()  local
641 	list_for_each_entry(node, &all_head, all) {  in reset_write()
642 		if (node->num_loaded > 0)  in reset_write()
643 			reset_node(node);  in reset_write()
644 		else if (list_empty(&node->children)) {  in reset_write()
645 			remove_node(node);  in reset_write()
670  * Create a node for a given profiling data set and add it to all lists and
679 	struct gcov_node *node;  in add_node()  local
698 		node = get_child_by_name(parent, curr);  in add_node()
699 		if (!node) {  in add_node()
700 			node = new_node(parent, NULL, curr);  in add_node()
701 			if (!node)  in add_node()
704 		parent = node;  in add_node()
706 	/* Create file node. */  in add_node()
707 	node = new_node(parent, info, curr);  in add_node()
708 	if (!node)  in add_node()
720  * Associate a profiling data set with an existing node. Needs to be called
723 static void add_info(struct gcov_node *node, struct gcov_info *info)  in add_info()  argument
726 	int num = node->num_loaded;  in add_info()
730 	 * case the new data set is incompatible, the node only contains  in add_info()
739 	memcpy(loaded_info, node->loaded_info,  in add_info()
748 		if (!gcov_info_is_compatible(node->unloaded_info, info)) {  in add_info()
752 			gcov_info_free(node->unloaded_info);  in add_info()
753 			node->unloaded_info = NULL;  in add_info()
760 		if (!gcov_info_is_compatible(node->loaded_info[0], info)) {  in add_info()
768 	kfree(node->loaded_info);  in add_info()
769 	node->loaded_info = loaded_info;  in add_info()
770 	node->num_loaded = num + 1;  in add_info()
774  * Return the index of a profiling data set associated with a node.
776 static int get_info_index(struct gcov_node *node, struct gcov_info *info)  in get_info_index()  argument
780 	for (i = 0; i < node->num_loaded; i++) {  in get_info_index()
781 		if (node->loaded_info[i] == info)  in get_info_index()
790 static void save_info(struct gcov_node *node, struct gcov_info *info)  in save_info()  argument
792 	if (node->unloaded_info)  in save_info()
793 		gcov_info_add(node->unloaded_info, info);  in save_info()
795 		node->unloaded_info = gcov_info_dup(info);  in save_info()
796 		if (!node->unloaded_info) {  in save_info()
805  * Disassociate a profiling data set from a node. Needs to be called with
808 static void remove_info(struct gcov_node *node, struct gcov_info *info)  in remove_info()  argument
812 	i = get_info_index(node, info);  in remove_info()
819 		save_info(node, info);  in remove_info()
821 	node->loaded_info[i] = node->loaded_info[node->num_loaded - 1];  in remove_info()
822 	node->num_loaded--;  in remove_info()
823 	if (node->num_loaded > 0)  in remove_info()
826 	kfree(node->loaded_info);  in remove_info()
827 	node->loaded_info = NULL;  in remove_info()
828 	node->num_loaded = 0;  in remove_info()
829 	if (!node->unloaded_info)  in remove_info()
830 		remove_node(node);  in remove_info()
839 	struct gcov_node *node;  in gcov_event()  local
842 	node = get_node_by_name(gcov_info_filename(info));  in gcov_event()
845 		if (node)  in gcov_event()
846 			add_info(node, info);  in gcov_event()
851 		if (node)  in gcov_event()
852 			remove_info(node, info);  in gcov_event()