104 static void __try_update_largest_extent(struct extent_tree *et,  in __try_update_largest_extent()  argument
107 	if (et->type != EX_READ)  in __try_update_largest_extent()
109 	if (en->ei.len <= et->largest.len)  in __try_update_largest_extent()
112 	et->largest = en->ei;  in __try_update_largest_extent()
113 	et->largest_updated = true;  in __try_update_largest_extent()
258 				struct extent_tree *et, struct extent_info *ei,  in __attach_extent_node()  argument
262 	struct extent_tree_info *eti = &sbi->extent_tree[et->type];  in __attach_extent_node()
271 	en->et = et;  in __attach_extent_node()
274 	rb_insert_color_cached(&en->rb_node, &et->root, leftmost);  in __attach_extent_node()
275 	atomic_inc(&et->node_cnt);  in __attach_extent_node()
281 				struct extent_tree *et, struct extent_node *en)  in __detach_extent_node()  argument
283 	struct extent_tree_info *eti = &sbi->extent_tree[et->type];  in __detach_extent_node()
285 	rb_erase_cached(&en->rb_node, &et->root);  in __detach_extent_node()
286 	atomic_dec(&et->node_cnt);  in __detach_extent_node()
289 	if (et->cached_en == en)  in __detach_extent_node()
290 		et->cached_en = NULL;  in __detach_extent_node()
301 			struct extent_tree *et, struct extent_node *en)  in __release_extent_node()  argument
303 	struct extent_tree_info *eti = &sbi->extent_tree[et->type];  in __release_extent_node()
310 	__detach_extent_node(sbi, et, en);  in __release_extent_node()
318 	struct extent_tree *et;  in __grab_extent_tree()  local
322 	et = radix_tree_lookup(&eti->extent_tree_root, ino);  in __grab_extent_tree()
323 	if (!et) {  in __grab_extent_tree()
324 		et = f2fs_kmem_cache_alloc(extent_tree_slab,  in __grab_extent_tree()
326 		f2fs_radix_tree_insert(&eti->extent_tree_root, ino, et);  in __grab_extent_tree()
327 		memset(et, 0, sizeof(struct extent_tree));  in __grab_extent_tree()
328 		et->ino = ino;  in __grab_extent_tree()
329 		et->type = type;  in __grab_extent_tree()
330 		et->root = RB_ROOT_CACHED;  in __grab_extent_tree()
331 		et->cached_en = NULL;  in __grab_extent_tree()
332 		rwlock_init(&et->lock);  in __grab_extent_tree()
333 		INIT_LIST_HEAD(&et->list);  in __grab_extent_tree()
334 		atomic_set(&et->node_cnt, 0);  in __grab_extent_tree()
338 		list_del_init(&et->list);  in __grab_extent_tree()
343 	F2FS_I(inode)->extent_tree[type] = et;  in __grab_extent_tree()
345 	return et;  in __grab_extent_tree()
349 					struct extent_tree *et)  in __free_extent_tree()  argument
353 	unsigned int count = atomic_read(&et->node_cnt);  in __free_extent_tree()
355 	node = rb_first_cached(&et->root);  in __free_extent_tree()
359 		__release_extent_node(sbi, et, en);  in __free_extent_tree()
363 	return count - atomic_read(&et->node_cnt);  in __free_extent_tree()
366 static void __drop_largest_extent(struct extent_tree *et,  in __drop_largest_extent()  argument
369 	if (fofs < (pgoff_t)et->largest.fofs + et->largest.len &&  in __drop_largest_extent()
370 			fofs + len > et->largest.fofs) {  in __drop_largest_extent()
371 		et->largest.len = 0;  in __drop_largest_extent()
372 		et->largest_updated = true;  in __drop_largest_extent()
381 	struct extent_tree *et;  in f2fs_init_read_extent_tree()  local
396 	et = __grab_extent_tree(inode, EX_READ);  in f2fs_init_read_extent_tree()
400 	write_lock(&et->lock);  in f2fs_init_read_extent_tree()
401 	if (atomic_read(&et->node_cnt) || !ei.len)  in f2fs_init_read_extent_tree()
404 	en = __attach_extent_node(sbi, et, &ei, NULL,  in f2fs_init_read_extent_tree()
405 				&et->root.rb_root.rb_node, true);  in f2fs_init_read_extent_tree()
407 		et->largest = en->ei;  in f2fs_init_read_extent_tree()
408 		et->cached_en = en;  in f2fs_init_read_extent_tree()
417 		et->largest.len = 0;  in f2fs_init_read_extent_tree()
418 		et->largest_updated = true;  in f2fs_init_read_extent_tree()
420 	write_unlock(&et->lock);  in f2fs_init_read_extent_tree()
446 	struct extent_tree *et = F2FS_I(inode)->extent_tree[type];  in __lookup_extent_tree()  local
450 	if (!et)  in __lookup_extent_tree()
455 	read_lock(&et->lock);  in __lookup_extent_tree()
458 			et->largest.fofs <= pgofs &&  in __lookup_extent_tree()
459 			(pgoff_t)et->largest.fofs + et->largest.len > pgofs) {  in __lookup_extent_tree()
460 		*ei = et->largest;  in __lookup_extent_tree()
466 	en = __lookup_extent_node(&et->root, et->cached_en, pgofs);  in __lookup_extent_tree()
470 	if (en == et->cached_en)  in __lookup_extent_tree()
479 		et->cached_en = en;  in __lookup_extent_tree()
485 	read_unlock(&et->lock);  in __lookup_extent_tree()
495 				struct extent_tree *et, struct extent_info *ei,  in __try_merge_extent_node()  argument
499 	struct extent_tree_info *eti = &sbi->extent_tree[et->type];  in __try_merge_extent_node()
502 	if (prev_ex && __is_back_mergeable(ei, &prev_ex->ei, et->type)) {  in __try_merge_extent_node()
508 	if (next_ex && __is_front_mergeable(ei, &next_ex->ei, et->type)) {  in __try_merge_extent_node()
511 		if (et->type == EX_READ)  in __try_merge_extent_node()
514 			__release_extent_node(sbi, et, prev_ex);  in __try_merge_extent_node()
522 	__try_update_largest_extent(et, en);  in __try_merge_extent_node()
527 		et->cached_en = en;  in __try_merge_extent_node()
534 				struct extent_tree *et, struct extent_info *ei,  in __insert_extent_tree()  argument
539 	struct extent_tree_info *eti = &sbi->extent_tree[et->type];  in __insert_extent_tree()
540 	struct rb_node **p = &et->root.rb_root.rb_node;  in __insert_extent_tree()
568 	en = __attach_extent_node(sbi, et, ei, parent, p, leftmost);  in __insert_extent_tree()
572 	__try_update_largest_extent(et, en);  in __insert_extent_tree()
577 	et->cached_en = en;  in __insert_extent_tree()
586 	struct extent_tree *et = F2FS_I(inode)->extent_tree[type];  in __update_extent_tree_range()  local
596 	if (!et)  in __update_extent_tree_range()
606 	write_lock(&et->lock);  in __update_extent_tree_range()
610 			write_unlock(&et->lock);  in __update_extent_tree_range()
614 		prev = et->largest;  in __update_extent_tree_range()
621 		__drop_largest_extent(et, fofs, len);  in __update_extent_tree_range()
625 	en = __lookup_extent_node_ret(&et->root,  in __update_extent_tree_range()
626 					et->cached_en, fofs,  in __update_extent_tree_range()
659 				en1 = __insert_extent_tree(sbi, et, &ei,  in __update_extent_tree_range()
681 			__try_update_largest_extent(et, en);  in __update_extent_tree_range()
683 			__release_extent_node(sbi, et, en);  in __update_extent_tree_range()
706 		if (!__try_merge_extent_node(sbi, et, &ei, prev_en, next_en))  in __update_extent_tree_range()
707 			__insert_extent_tree(sbi, et, &ei,  in __update_extent_tree_range()
713 				et->largest.len < F2FS_MIN_EXTENT_LEN) {  in __update_extent_tree_range()
714 			et->largest.len = 0;  in __update_extent_tree_range()
715 			et->largest_updated = true;  in __update_extent_tree_range()
721 		__free_extent_tree(sbi, et);  in __update_extent_tree_range()
723 	if (et->largest_updated) {  in __update_extent_tree_range()
724 		et->largest_updated = false;  in __update_extent_tree_range()
734 	if (!__try_merge_extent_node(sbi, et, &ei, prev_en, next_en))  in __update_extent_tree_range()
735 		__insert_extent_tree(sbi, et, &ei,  in __update_extent_tree_range()
738 	write_unlock(&et->lock);  in __update_extent_tree_range()
750 	struct extent_tree *et = F2FS_I(inode)->extent_tree[EX_READ];  in f2fs_update_read_extent_tree_range_compressed()  local
760 	/* it is safe here to check FI_NO_EXTENT w/o et->lock in ro image */  in f2fs_update_read_extent_tree_range_compressed()
764 	write_lock(&et->lock);  in f2fs_update_read_extent_tree_range_compressed()
766 	en = __lookup_extent_node_ret(&et->root,  in f2fs_update_read_extent_tree_range_compressed()
767 					et->cached_en, fofs,  in f2fs_update_read_extent_tree_range_compressed()
777 	if (!__try_merge_extent_node(sbi, et, &ei, prev_en, next_en))  in f2fs_update_read_extent_tree_range_compressed()
778 		__insert_extent_tree(sbi, et, &ei,  in f2fs_update_read_extent_tree_range_compressed()
781 	write_unlock(&et->lock);  in f2fs_update_read_extent_tree_range_compressed()
887 	struct extent_tree *et, *next;  in __shrink_extent_tree()  local
899 	list_for_each_entry_safe(et, next, &eti->zombie_list, list) {  in __shrink_extent_tree()
900 		if (atomic_read(&et->node_cnt)) {  in __shrink_extent_tree()
901 			write_lock(&et->lock);  in __shrink_extent_tree()
902 			node_cnt += __free_extent_tree(sbi, et);  in __shrink_extent_tree()
903 			write_unlock(&et->lock);  in __shrink_extent_tree()
905 		f2fs_bug_on(sbi, atomic_read(&et->node_cnt));  in __shrink_extent_tree()
906 		list_del_init(&et->list);  in __shrink_extent_tree()
907 		radix_tree_delete(&eti->extent_tree_root, et->ino);  in __shrink_extent_tree()
908 		kmem_cache_free(extent_tree_slab, et);  in __shrink_extent_tree()
932 		et = en->et;  in __shrink_extent_tree()
933 		if (!write_trylock(&et->lock)) {  in __shrink_extent_tree()
942 		__detach_extent_node(sbi, et, en);  in __shrink_extent_tree()
944 		write_unlock(&et->lock);  in __shrink_extent_tree()
1048 	struct extent_tree *et = F2FS_I(inode)->extent_tree[type];  in __destroy_extent_node()  local
1051 	if (!et || !atomic_read(&et->node_cnt))  in __destroy_extent_node()
1054 	write_lock(&et->lock);  in __destroy_extent_node()
1055 	node_cnt = __free_extent_tree(sbi, et);  in __destroy_extent_node()
1056 	write_unlock(&et->lock);  in __destroy_extent_node()
1070 	struct extent_tree *et = F2FS_I(inode)->extent_tree[type];  in __drop_extent_tree()  local
1076 	write_lock(&et->lock);  in __drop_extent_tree()
1077 	__free_extent_tree(sbi, et);  in __drop_extent_tree()
1080 		if (et->largest.len) {  in __drop_extent_tree()
1081 			et->largest.len = 0;  in __drop_extent_tree()
1085 	write_unlock(&et->lock);  in __drop_extent_tree()
1100 	struct extent_tree *et = F2FS_I(inode)->extent_tree[type];  in __destroy_extent_tree()  local
1103 	if (!et)  in __destroy_extent_tree()
1107 					atomic_read(&et->node_cnt)) {  in __destroy_extent_tree()
1109 		list_add_tail(&et->list, &eti->zombie_list);  in __destroy_extent_tree()
1120 	f2fs_bug_on(sbi, atomic_read(&et->node_cnt));  in __destroy_extent_tree()
1122 	kmem_cache_free(extent_tree_slab, et);  in __destroy_extent_tree()