105 static void __try_update_largest_extent(struct extent_tree *et,  in __try_update_largest_extent()  argument
108 	if (et->type != EX_READ)  in __try_update_largest_extent()
110 	if (en->ei.len <= et->largest.len)  in __try_update_largest_extent()
113 	et->largest = en->ei;  in __try_update_largest_extent()
114 	et->largest_updated = true;  in __try_update_largest_extent()
259 				struct extent_tree *et, struct extent_info *ei,  in __attach_extent_node()  argument
263 	struct extent_tree_info *eti = &sbi->extent_tree[et->type];  in __attach_extent_node()
272 	en->et = et;  in __attach_extent_node()
275 	rb_insert_color_cached(&en->rb_node, &et->root, leftmost);  in __attach_extent_node()
276 	atomic_inc(&et->node_cnt);  in __attach_extent_node()
282 				struct extent_tree *et, struct extent_node *en)  in __detach_extent_node()  argument
284 	struct extent_tree_info *eti = &sbi->extent_tree[et->type];  in __detach_extent_node()
286 	rb_erase_cached(&en->rb_node, &et->root);  in __detach_extent_node()
287 	atomic_dec(&et->node_cnt);  in __detach_extent_node()
290 	if (et->cached_en == en)  in __detach_extent_node()
291 		et->cached_en = NULL;  in __detach_extent_node()
302 			struct extent_tree *et, struct extent_node *en)  in __release_extent_node()  argument
304 	struct extent_tree_info *eti = &sbi->extent_tree[et->type];  in __release_extent_node()
311 	__detach_extent_node(sbi, et, en);  in __release_extent_node()
319 	struct extent_tree *et;  in __grab_extent_tree()  local
323 	et = radix_tree_lookup(&eti->extent_tree_root, ino);  in __grab_extent_tree()
324 	if (!et) {  in __grab_extent_tree()
325 		et = f2fs_kmem_cache_alloc(extent_tree_slab,  in __grab_extent_tree()
327 		f2fs_radix_tree_insert(&eti->extent_tree_root, ino, et);  in __grab_extent_tree()
328 		memset(et, 0, sizeof(struct extent_tree));  in __grab_extent_tree()
329 		et->ino = ino;  in __grab_extent_tree()
330 		et->type = type;  in __grab_extent_tree()
331 		et->root = RB_ROOT_CACHED;  in __grab_extent_tree()
332 		et->cached_en = NULL;  in __grab_extent_tree()
333 		rwlock_init(&et->lock);  in __grab_extent_tree()
334 		INIT_LIST_HEAD(&et->list);  in __grab_extent_tree()
335 		atomic_set(&et->node_cnt, 0);  in __grab_extent_tree()
339 		list_del_init(&et->list);  in __grab_extent_tree()
344 	F2FS_I(inode)->extent_tree[type] = et;  in __grab_extent_tree()
346 	return et;  in __grab_extent_tree()
350 				struct extent_tree *et, unsigned int nr_shrink)  in __free_extent_tree()  argument
356 	node = rb_first_cached(&et->root);  in __free_extent_tree()
361 		__release_extent_node(sbi, et, en);  in __free_extent_tree()
368 static void __drop_largest_extent(struct extent_tree *et,  in __drop_largest_extent()  argument
371 	if (fofs < (pgoff_t)et->largest.fofs + et->largest.len &&  in __drop_largest_extent()
372 			fofs + len > et->largest.fofs) {  in __drop_largest_extent()
373 		et->largest.len = 0;  in __drop_largest_extent()
374 		et->largest_updated = true;  in __drop_largest_extent()
383 	struct extent_tree *et;  in f2fs_init_read_extent_tree()  local
398 	et = __grab_extent_tree(inode, EX_READ);  in f2fs_init_read_extent_tree()
402 	write_lock(&et->lock);  in f2fs_init_read_extent_tree()
403 	if (atomic_read(&et->node_cnt) || !ei.len)  in f2fs_init_read_extent_tree()
406 	en = __attach_extent_node(sbi, et, &ei, NULL,  in f2fs_init_read_extent_tree()
407 				&et->root.rb_root.rb_node, true);  in f2fs_init_read_extent_tree()
409 		et->largest = en->ei;  in f2fs_init_read_extent_tree()
410 		et->cached_en = en;  in f2fs_init_read_extent_tree()
419 		et->largest.len = 0;  in f2fs_init_read_extent_tree()
420 		et->largest_updated = true;  in f2fs_init_read_extent_tree()
422 	write_unlock(&et->lock);  in f2fs_init_read_extent_tree()
448 	struct extent_tree *et = F2FS_I(inode)->extent_tree[type];  in __lookup_extent_tree()  local
452 	if (!et)  in __lookup_extent_tree()
457 	read_lock(&et->lock);  in __lookup_extent_tree()
460 			et->largest.fofs <= pgofs &&  in __lookup_extent_tree()
461 			(pgoff_t)et->largest.fofs + et->largest.len > pgofs) {  in __lookup_extent_tree()
462 		*ei = et->largest;  in __lookup_extent_tree()
468 	en = __lookup_extent_node(&et->root, et->cached_en, pgofs);  in __lookup_extent_tree()
472 	if (en == et->cached_en)  in __lookup_extent_tree()
481 		et->cached_en = en;  in __lookup_extent_tree()
487 	read_unlock(&et->lock);  in __lookup_extent_tree()
497 				struct extent_tree *et, struct extent_info *ei,  in __try_merge_extent_node()  argument
501 	struct extent_tree_info *eti = &sbi->extent_tree[et->type];  in __try_merge_extent_node()
504 	if (prev_ex && __is_back_mergeable(ei, &prev_ex->ei, et->type)) {  in __try_merge_extent_node()
510 	if (next_ex && __is_front_mergeable(ei, &next_ex->ei, et->type)) {  in __try_merge_extent_node()
513 		if (et->type == EX_READ)  in __try_merge_extent_node()
516 			__release_extent_node(sbi, et, prev_ex);  in __try_merge_extent_node()
524 	__try_update_largest_extent(et, en);  in __try_merge_extent_node()
529 		et->cached_en = en;  in __try_merge_extent_node()
536 				struct extent_tree *et, struct extent_info *ei,  in __insert_extent_tree()  argument
541 	struct extent_tree_info *eti = &sbi->extent_tree[et->type];  in __insert_extent_tree()
542 	struct rb_node **p = &et->root.rb_root.rb_node;  in __insert_extent_tree()
570 	en = __attach_extent_node(sbi, et, ei, parent, p, leftmost);  in __insert_extent_tree()
574 	__try_update_largest_extent(et, en);  in __insert_extent_tree()
579 	et->cached_en = en;  in __insert_extent_tree()
588 	struct extent_tree *et = F2FS_I(inode)->extent_tree[type];  in __destroy_extent_node()  local
594 	if (!et || !atomic_read(&et->node_cnt))  in __destroy_extent_node()
597 	while (atomic_read(&et->node_cnt)) {  in __destroy_extent_node()
598 		write_lock(&et->lock);  in __destroy_extent_node()
599 		node_cnt += __free_extent_tree(sbi, et, nr_shrink);  in __destroy_extent_node()
600 		write_unlock(&et->lock);  in __destroy_extent_node()
603 	f2fs_bug_on(sbi, atomic_read(&et->node_cnt));  in __destroy_extent_node()
612 	struct extent_tree *et = F2FS_I(inode)->extent_tree[type];  in __update_extent_tree_range()  local
622 	if (!et)  in __update_extent_tree_range()
632 	write_lock(&et->lock);  in __update_extent_tree_range()
636 			write_unlock(&et->lock);  in __update_extent_tree_range()
640 		prev = et->largest;  in __update_extent_tree_range()
647 		__drop_largest_extent(et, fofs, len);  in __update_extent_tree_range()
651 	en = __lookup_extent_node_ret(&et->root,  in __update_extent_tree_range()
652 					et->cached_en, fofs,  in __update_extent_tree_range()
685 				en1 = __insert_extent_tree(sbi, et, &ei,  in __update_extent_tree_range()
707 			__try_update_largest_extent(et, en);  in __update_extent_tree_range()
709 			__release_extent_node(sbi, et, en);  in __update_extent_tree_range()
732 		if (!__try_merge_extent_node(sbi, et, &ei, prev_en, next_en))  in __update_extent_tree_range()
733 			__insert_extent_tree(sbi, et, &ei,  in __update_extent_tree_range()
739 				et->largest.len < F2FS_MIN_EXTENT_LEN) {  in __update_extent_tree_range()
740 			et->largest.len = 0;  in __update_extent_tree_range()
741 			et->largest_updated = true;  in __update_extent_tree_range()
746 	if (et->largest_updated) {  in __update_extent_tree_range()
747 		et->largest_updated = false;  in __update_extent_tree_range()
757 	if (!__try_merge_extent_node(sbi, et, &ei, prev_en, next_en))  in __update_extent_tree_range()
758 		__insert_extent_tree(sbi, et, &ei,  in __update_extent_tree_range()
761 	write_unlock(&et->lock);  in __update_extent_tree_range()
776 	struct extent_tree *et = F2FS_I(inode)->extent_tree[EX_READ];  in f2fs_update_read_extent_tree_range_compressed()  local
790 	write_lock(&et->lock);  in f2fs_update_read_extent_tree_range_compressed()
792 	en = __lookup_extent_node_ret(&et->root,  in f2fs_update_read_extent_tree_range_compressed()
793 					et->cached_en, fofs,  in f2fs_update_read_extent_tree_range_compressed()
803 	if (!__try_merge_extent_node(sbi, et, &ei, prev_en, next_en))  in f2fs_update_read_extent_tree_range_compressed()
804 		__insert_extent_tree(sbi, et, &ei,  in f2fs_update_read_extent_tree_range_compressed()
807 	write_unlock(&et->lock);  in f2fs_update_read_extent_tree_range_compressed()
915 	struct extent_tree *et, *next;  in __shrink_extent_tree()  local
927 	list_for_each_entry_safe(et, next, &eti->zombie_list, list) {  in __shrink_extent_tree()
928 		if (atomic_read(&et->node_cnt)) {  in __shrink_extent_tree()
929 			write_lock(&et->lock);  in __shrink_extent_tree()
930 			node_cnt += __free_extent_tree(sbi, et,  in __shrink_extent_tree()
932 			write_unlock(&et->lock);  in __shrink_extent_tree()
935 		if (atomic_read(&et->node_cnt))  in __shrink_extent_tree()
938 		list_del_init(&et->list);  in __shrink_extent_tree()
939 		radix_tree_delete(&eti->extent_tree_root, et->ino);  in __shrink_extent_tree()
940 		kmem_cache_free(extent_tree_slab, et);  in __shrink_extent_tree()
964 		et = en->et;  in __shrink_extent_tree()
965 		if (!write_trylock(&et->lock)) {  in __shrink_extent_tree()
974 		__detach_extent_node(sbi, et, en);  in __shrink_extent_tree()
976 		write_unlock(&et->lock);  in __shrink_extent_tree()
1084 	struct extent_tree *et = F2FS_I(inode)->extent_tree[type];  in __drop_extent_tree()  local
1090 	write_lock(&et->lock);  in __drop_extent_tree()
1093 		if (et->largest.len) {  in __drop_extent_tree()
1094 			et->largest.len = 0;  in __drop_extent_tree()
1098 	write_unlock(&et->lock);  in __drop_extent_tree()
1116 	struct extent_tree *et = F2FS_I(inode)->extent_tree[type];  in __destroy_extent_tree()  local
1119 	if (!et)  in __destroy_extent_tree()
1123 					atomic_read(&et->node_cnt)) {  in __destroy_extent_tree()
1125 		list_add_tail(&et->list, &eti->zombie_list);  in __destroy_extent_tree()
1136 	f2fs_bug_on(sbi, atomic_read(&et->node_cnt));  in __destroy_extent_tree()
1138 	kmem_cache_free(extent_tree_slab, et);  in __destroy_extent_tree()