137 static void __try_update_largest_extent(struct extent_tree *et,  in __try_update_largest_extent()  argument
140 	if (et->type != EX_READ)  in __try_update_largest_extent()
142 	if (en->ei.len <= et->largest.len)  in __try_update_largest_extent()
145 	et->largest = en->ei;  in __try_update_largest_extent()
146 	et->largest_updated = true;  in __try_update_largest_extent()
291 				struct extent_tree *et, struct extent_info *ei,  in __attach_extent_node()  argument
295 	struct extent_tree_info *eti = &sbi->extent_tree[et->type];  in __attach_extent_node()
304 	en->et = et;  in __attach_extent_node()
307 	rb_insert_color_cached(&en->rb_node, &et->root, leftmost);  in __attach_extent_node()
308 	atomic_inc(&et->node_cnt);  in __attach_extent_node()
314 				struct extent_tree *et, struct extent_node *en)  in __detach_extent_node()  argument
316 	struct extent_tree_info *eti = &sbi->extent_tree[et->type];  in __detach_extent_node()
318 	rb_erase_cached(&en->rb_node, &et->root);  in __detach_extent_node()
319 	atomic_dec(&et->node_cnt);  in __detach_extent_node()
322 	if (et->cached_en == en)  in __detach_extent_node()
323 		et->cached_en = NULL;  in __detach_extent_node()
334 			struct extent_tree *et, struct extent_node *en)  in __release_extent_node()  argument
336 	struct extent_tree_info *eti = &sbi->extent_tree[et->type];  in __release_extent_node()
343 	__detach_extent_node(sbi, et, en);  in __release_extent_node()
351 	struct extent_tree *et;  in __grab_extent_tree()  local
355 	et = radix_tree_lookup(&eti->extent_tree_root, ino);  in __grab_extent_tree()
356 	if (!et) {  in __grab_extent_tree()
357 		et = f2fs_kmem_cache_alloc(extent_tree_slab,  in __grab_extent_tree()
359 		f2fs_radix_tree_insert(&eti->extent_tree_root, ino, et);  in __grab_extent_tree()
360 		memset(et, 0, sizeof(struct extent_tree));  in __grab_extent_tree()
361 		et->ino = ino;  in __grab_extent_tree()
362 		et->type = type;  in __grab_extent_tree()
363 		et->root = RB_ROOT_CACHED;  in __grab_extent_tree()
364 		et->cached_en = NULL;  in __grab_extent_tree()
365 		rwlock_init(&et->lock);  in __grab_extent_tree()
366 		INIT_LIST_HEAD(&et->list);  in __grab_extent_tree()
367 		atomic_set(&et->node_cnt, 0);  in __grab_extent_tree()
371 		list_del_init(&et->list);  in __grab_extent_tree()
376 	F2FS_I(inode)->extent_tree[type] = et;  in __grab_extent_tree()
378 	return et;  in __grab_extent_tree()
382 				struct extent_tree *et, unsigned int nr_shrink)  in __free_extent_tree()  argument
388 	node = rb_first_cached(&et->root);  in __free_extent_tree()
393 		__release_extent_node(sbi, et, en);  in __free_extent_tree()
400 static void __drop_largest_extent(struct extent_tree *et,  in __drop_largest_extent()  argument
403 	if (fofs < (pgoff_t)et->largest.fofs + et->largest.len &&  in __drop_largest_extent()
404 			fofs + len > et->largest.fofs) {  in __drop_largest_extent()
405 		et->largest.len = 0;  in __drop_largest_extent()
406 		et->largest_updated = true;  in __drop_largest_extent()
415 	struct extent_tree *et;  in f2fs_init_read_extent_tree()  local
430 	et = __grab_extent_tree(inode, EX_READ);  in f2fs_init_read_extent_tree()
434 	write_lock(&et->lock);  in f2fs_init_read_extent_tree()
435 	if (atomic_read(&et->node_cnt) || !ei.len)  in f2fs_init_read_extent_tree()
439 		et->largest = ei;  in f2fs_init_read_extent_tree()
443 	en = __attach_extent_node(sbi, et, &ei, NULL,  in f2fs_init_read_extent_tree()
444 				&et->root.rb_root.rb_node, true);  in f2fs_init_read_extent_tree()
446 		et->largest = en->ei;  in f2fs_init_read_extent_tree()
447 		et->cached_en = en;  in f2fs_init_read_extent_tree()
456 		et->largest.len = 0;  in f2fs_init_read_extent_tree()
457 		et->largest_updated = true;  in f2fs_init_read_extent_tree()
459 	write_unlock(&et->lock);  in f2fs_init_read_extent_tree()
485 	struct extent_tree *et = F2FS_I(inode)->extent_tree[type];  in __lookup_extent_tree()  local
489 	if (!et)  in __lookup_extent_tree()
494 	read_lock(&et->lock);  in __lookup_extent_tree()
497 			et->largest.fofs <= pgofs &&  in __lookup_extent_tree()
498 			(pgoff_t)et->largest.fofs + et->largest.len > pgofs) {  in __lookup_extent_tree()
499 		*ei = et->largest;  in __lookup_extent_tree()
510 	en = __lookup_extent_node(&et->root, et->cached_en, pgofs);  in __lookup_extent_tree()
514 	if (en == et->cached_en)  in __lookup_extent_tree()
523 		et->cached_en = en;  in __lookup_extent_tree()
529 	read_unlock(&et->lock);  in __lookup_extent_tree()
539 				struct extent_tree *et, struct extent_info *ei,  in __try_merge_extent_node()  argument
543 	struct extent_tree_info *eti = &sbi->extent_tree[et->type];  in __try_merge_extent_node()
546 	if (prev_ex && __is_back_mergeable(ei, &prev_ex->ei, et->type)) {  in __try_merge_extent_node()
552 	if (next_ex && __is_front_mergeable(ei, &next_ex->ei, et->type)) {  in __try_merge_extent_node()
555 		if (et->type == EX_READ)  in __try_merge_extent_node()
558 			__release_extent_node(sbi, et, prev_ex);  in __try_merge_extent_node()
566 	__try_update_largest_extent(et, en);  in __try_merge_extent_node()
571 		et->cached_en = en;  in __try_merge_extent_node()
578 				struct extent_tree *et, struct extent_info *ei,  in __insert_extent_tree()  argument
583 	struct extent_tree_info *eti = &sbi->extent_tree[et->type];  in __insert_extent_tree()
584 	struct rb_node **p = &et->root.rb_root.rb_node;  in __insert_extent_tree()
612 	en = __attach_extent_node(sbi, et, ei, parent, p, leftmost);  in __insert_extent_tree()
616 	__try_update_largest_extent(et, en);  in __insert_extent_tree()
621 	et->cached_en = en;  in __insert_extent_tree()
630 	struct extent_tree *et = F2FS_I(inode)->extent_tree[type];  in __destroy_extent_node()  local
636 	if (!et || !atomic_read(&et->node_cnt))  in __destroy_extent_node()
639 	while (atomic_read(&et->node_cnt)) {  in __destroy_extent_node()
640 		write_lock(&et->lock);  in __destroy_extent_node()
641 		node_cnt += __free_extent_tree(sbi, et, nr_shrink);  in __destroy_extent_node()
642 		write_unlock(&et->lock);  in __destroy_extent_node()
645 	f2fs_bug_on(sbi, atomic_read(&et->node_cnt));  in __destroy_extent_node()
654 	struct extent_tree *et = F2FS_I(inode)->extent_tree[type];  in __update_extent_tree_range()  local
664 	if (!et)  in __update_extent_tree_range()
674 	write_lock(&et->lock);  in __update_extent_tree_range()
678 			write_unlock(&et->lock);  in __update_extent_tree_range()
682 		prev = et->largest;  in __update_extent_tree_range()
689 		__drop_largest_extent(et, fofs, len);  in __update_extent_tree_range()
693 	en = __lookup_extent_node_ret(&et->root,  in __update_extent_tree_range()
694 					et->cached_en, fofs,  in __update_extent_tree_range()
721 			atomic_read(&et->node_cnt) <  in __update_extent_tree_range()
729 				en1 = __insert_extent_tree(sbi, et, &ei,  in __update_extent_tree_range()
751 			__try_update_largest_extent(et, en);  in __update_extent_tree_range()
753 			__release_extent_node(sbi, et, en);  in __update_extent_tree_range()
776 		if (!__try_merge_extent_node(sbi, et, &ei, prev_en, next_en))  in __update_extent_tree_range()
777 			__insert_extent_tree(sbi, et, &ei,  in __update_extent_tree_range()
783 				et->largest.len < F2FS_MIN_EXTENT_LEN) {  in __update_extent_tree_range()
784 			et->largest.len = 0;  in __update_extent_tree_range()
785 			et->largest_updated = true;  in __update_extent_tree_range()
790 	if (et->largest_updated) {  in __update_extent_tree_range()
791 		et->largest_updated = false;  in __update_extent_tree_range()
801 	if (!__try_merge_extent_node(sbi, et, &ei, prev_en, next_en))  in __update_extent_tree_range()
802 		__insert_extent_tree(sbi, et, &ei,  in __update_extent_tree_range()
805 	write_unlock(&et->lock);  in __update_extent_tree_range()
820 	struct extent_tree *et = F2FS_I(inode)->extent_tree[EX_READ];  in f2fs_update_read_extent_tree_range_compressed()  local
830 	/* it is safe here to check FI_NO_EXTENT w/o et->lock in ro image */  in f2fs_update_read_extent_tree_range_compressed()
834 	write_lock(&et->lock);  in f2fs_update_read_extent_tree_range_compressed()
836 	en = __lookup_extent_node_ret(&et->root,  in f2fs_update_read_extent_tree_range_compressed()
837 					et->cached_en, fofs,  in f2fs_update_read_extent_tree_range_compressed()
847 	if (!__try_merge_extent_node(sbi, et, &ei, prev_en, next_en))  in f2fs_update_read_extent_tree_range_compressed()
848 		__insert_extent_tree(sbi, et, &ei,  in f2fs_update_read_extent_tree_range_compressed()
851 	write_unlock(&et->lock);  in f2fs_update_read_extent_tree_range_compressed()
957 	struct extent_tree *et, *next;  in __shrink_extent_tree()  local
969 	list_for_each_entry_safe(et, next, &eti->zombie_list, list) {  in __shrink_extent_tree()
970 		if (atomic_read(&et->node_cnt)) {  in __shrink_extent_tree()
971 			write_lock(&et->lock);  in __shrink_extent_tree()
972 			node_cnt += __free_extent_tree(sbi, et,  in __shrink_extent_tree()
974 			write_unlock(&et->lock);  in __shrink_extent_tree()
977 		if (atomic_read(&et->node_cnt))  in __shrink_extent_tree()
980 		list_del_init(&et->list);  in __shrink_extent_tree()
981 		radix_tree_delete(&eti->extent_tree_root, et->ino);  in __shrink_extent_tree()
982 		kmem_cache_free(extent_tree_slab, et);  in __shrink_extent_tree()
1006 		et = en->et;  in __shrink_extent_tree()
1007 		if (!write_trylock(&et->lock)) {  in __shrink_extent_tree()
1016 		__detach_extent_node(sbi, et, en);  in __shrink_extent_tree()
1018 		write_unlock(&et->lock);  in __shrink_extent_tree()
1126 	struct extent_tree *et = F2FS_I(inode)->extent_tree[type];  in __drop_extent_tree()  local
1132 	write_lock(&et->lock);  in __drop_extent_tree()
1135 		if (et->largest.len) {  in __drop_extent_tree()
1136 			et->largest.len = 0;  in __drop_extent_tree()
1140 	write_unlock(&et->lock);  in __drop_extent_tree()
1158 	struct extent_tree *et = F2FS_I(inode)->extent_tree[type];  in __destroy_extent_tree()  local
1161 	if (!et)  in __destroy_extent_tree()
1165 					atomic_read(&et->node_cnt)) {  in __destroy_extent_tree()
1167 		list_add_tail(&et->list, &eti->zombie_list);  in __destroy_extent_tree()
1178 	f2fs_bug_on(sbi, atomic_read(&et->node_cnt));  in __destroy_extent_tree()
1180 	kmem_cache_free(extent_tree_slab, et);  in __destroy_extent_tree()