54 static void btrfs_destroy_ordered_extents(struct btrfs_root *root);
57 static void btrfs_destroy_delalloc_inodes(struct btrfs_root *root);
686 	struct btrfs_fs_info *fs_info = BTRFS_I(inode)->root->fs_info;  in btrfs_wq_submit_bio()
715 	struct btrfs_root *root;  in btree_csum_one_bio()  local
721 		root = BTRFS_I(bvec->bv_page->mapping->host)->root;  in btree_csum_one_bio()
722 		ret = csum_dirty_buffer(root->fs_info, bvec);  in btree_csum_one_bio()
816 		fs_info = BTRFS_I(mapping->host)->root->fs_info;  in btree_writepages()
843 		btrfs_warn(BTRFS_I(folio->mapping->host)->root->fs_info,  in btree_invalidate_folio()
967 static void __setup_root(struct btrfs_root *root, struct btrfs_fs_info *fs_info,  in __setup_root()  argument
972 	memset(&root->root_key, 0, sizeof(root->root_key));  in __setup_root()
973 	memset(&root->root_item, 0, sizeof(root->root_item));  in __setup_root()
974 	memset(&root->defrag_progress, 0, sizeof(root->defrag_progress));  in __setup_root()
975 	root->fs_info = fs_info;  in __setup_root()
976 	root->root_key.objectid = objectid;  in __setup_root()
977 	root->node = NULL;  in __setup_root()
978 	root->commit_root = NULL;  in __setup_root()
979 	root->state = 0;  in __setup_root()
980 	RB_CLEAR_NODE(&root->rb_node);  in __setup_root()
982 	root->last_trans = 0;  in __setup_root()
983 	root->free_objectid = 0;  in __setup_root()
984 	root->nr_delalloc_inodes = 0;  in __setup_root()
985 	root->nr_ordered_extents = 0;  in __setup_root()
986 	root->inode_tree = RB_ROOT;  in __setup_root()
987 	INIT_RADIX_TREE(&root->delayed_nodes_tree, GFP_ATOMIC);  in __setup_root()
989 	btrfs_init_root_block_rsv(root);  in __setup_root()
991 	INIT_LIST_HEAD(&root->dirty_list);  in __setup_root()
992 	INIT_LIST_HEAD(&root->root_list);  in __setup_root()
993 	INIT_LIST_HEAD(&root->delalloc_inodes);  in __setup_root()
994 	INIT_LIST_HEAD(&root->delalloc_root);  in __setup_root()
995 	INIT_LIST_HEAD(&root->ordered_extents);  in __setup_root()
996 	INIT_LIST_HEAD(&root->ordered_root);  in __setup_root()
997 	INIT_LIST_HEAD(&root->reloc_dirty_list);  in __setup_root()
998 	INIT_LIST_HEAD(&root->logged_list[0]);  in __setup_root()
999 	INIT_LIST_HEAD(&root->logged_list[1]);  in __setup_root()
1000 	spin_lock_init(&root->inode_lock);  in __setup_root()
1001 	spin_lock_init(&root->delalloc_lock);  in __setup_root()
1002 	spin_lock_init(&root->ordered_extent_lock);  in __setup_root()
1003 	spin_lock_init(&root->accounting_lock);  in __setup_root()
1004 	spin_lock_init(&root->log_extents_lock[0]);  in __setup_root()
1005 	spin_lock_init(&root->log_extents_lock[1]);  in __setup_root()
1006 	spin_lock_init(&root->qgroup_meta_rsv_lock);  in __setup_root()
1007 	mutex_init(&root->objectid_mutex);  in __setup_root()
1008 	mutex_init(&root->log_mutex);  in __setup_root()
1009 	mutex_init(&root->ordered_extent_mutex);  in __setup_root()
1010 	mutex_init(&root->delalloc_mutex);  in __setup_root()
1011 	init_waitqueue_head(&root->qgroup_flush_wait);  in __setup_root()
1012 	init_waitqueue_head(&root->log_writer_wait);  in __setup_root()
1013 	init_waitqueue_head(&root->log_commit_wait[0]);  in __setup_root()
1014 	init_waitqueue_head(&root->log_commit_wait[1]);  in __setup_root()
1015 	INIT_LIST_HEAD(&root->log_ctxs[0]);  in __setup_root()
1016 	INIT_LIST_HEAD(&root->log_ctxs[1]);  in __setup_root()
1017 	atomic_set(&root->log_commit[0], 0);  in __setup_root()
1018 	atomic_set(&root->log_commit[1], 0);  in __setup_root()
1019 	atomic_set(&root->log_writers, 0);  in __setup_root()
1020 	atomic_set(&root->log_batch, 0);  in __setup_root()
1021 	refcount_set(&root->refs, 1);  in __setup_root()
1022 	atomic_set(&root->snapshot_force_cow, 0);  in __setup_root()
1023 	atomic_set(&root->nr_swapfiles, 0);  in __setup_root()
1024 	root->log_transid = 0;  in __setup_root()
1025 	root->log_transid_committed = -1;  in __setup_root()
1026 	root->last_log_commit = 0;  in __setup_root()
1027 	root->anon_dev = 0;  in __setup_root()
1029 		extent_io_tree_init(fs_info, &root->dirty_log_pages,  in __setup_root()
1031 		extent_io_tree_init(fs_info, &root->log_csum_range,  in __setup_root()
1035 	spin_lock_init(&root->root_item_lock);  in __setup_root()
1036 	btrfs_qgroup_init_swapped_blocks(&root->swapped_blocks);  in __setup_root()
1038 	INIT_LIST_HEAD(&root->leak_list);  in __setup_root()
1040 	list_add_tail(&root->leak_list, &fs_info->allocated_roots);  in __setup_root()
1048 	struct btrfs_root *root = kzalloc(sizeof(*root), flags);  in btrfs_alloc_root()  local
1049 	if (root)  in btrfs_alloc_root()
1050 		__setup_root(root, fs_info, objectid);  in btrfs_alloc_root()
1051 	return root;  in btrfs_alloc_root()
1058 	struct btrfs_root *root;  in btrfs_alloc_dummy_root()  local
1063 	root = btrfs_alloc_root(fs_info, BTRFS_ROOT_TREE_OBJECTID, GFP_KERNEL);  in btrfs_alloc_dummy_root()
1064 	if (!root)  in btrfs_alloc_dummy_root()
1068 	root->alloc_bytenr = 0;  in btrfs_alloc_dummy_root()
1070 	return root;  in btrfs_alloc_dummy_root()
1085 	const struct btrfs_root *root = rb_entry(node, struct btrfs_root, rb_node);  in global_root_key_cmp()  local
1087 	return btrfs_comp_cpu_keys(key, &root->root_key);  in global_root_key_cmp()
1090 int btrfs_global_root_insert(struct btrfs_root *root)  in btrfs_global_root_insert()  argument
1092 	struct btrfs_fs_info *fs_info = root->fs_info;  in btrfs_global_root_insert()
1096 	tmp = rb_find_add(&root->rb_node, &fs_info->global_root_tree, global_root_cmp);  in btrfs_global_root_insert()
1103 void btrfs_global_root_delete(struct btrfs_root *root)  in btrfs_global_root_delete()  argument
1105 	struct btrfs_fs_info *fs_info = root->fs_info;  in btrfs_global_root_delete()
1108 	rb_erase(&root->rb_node, &fs_info->global_root_tree);  in btrfs_global_root_delete()
1116 	struct btrfs_root *root = NULL;  in btrfs_global_root()  local
1121 		root = container_of(node, struct btrfs_root, rb_node);  in btrfs_global_root()
1124 	return root;  in btrfs_global_root()
1176 	struct btrfs_root *root;  in btrfs_create_tree()  local
1186 	root = btrfs_alloc_root(fs_info, objectid, GFP_KERNEL);  in btrfs_create_tree()
1188 	if (!root)  in btrfs_create_tree()
1191 	root->root_key.objectid = objectid;  in btrfs_create_tree()
1192 	root->root_key.type = BTRFS_ROOT_ITEM_KEY;  in btrfs_create_tree()
1193 	root->root_key.offset = 0;  in btrfs_create_tree()
1195 	leaf = btrfs_alloc_tree_block(trans, root, 0, objectid, NULL, 0, 0, 0,  in btrfs_create_tree()
1203 	root->node = leaf;  in btrfs_create_tree()
1206 	root->commit_root = btrfs_root_node(root);  in btrfs_create_tree()
1207 	set_bit(BTRFS_ROOT_TRACK_DIRTY, &root->state);  in btrfs_create_tree()
1209 	btrfs_set_root_flags(&root->root_item, 0);  in btrfs_create_tree()
1210 	btrfs_set_root_limit(&root->root_item, 0);  in btrfs_create_tree()
1211 	btrfs_set_root_bytenr(&root->root_item, leaf->start);  in btrfs_create_tree()
1212 	btrfs_set_root_generation(&root->root_item, trans->transid);  in btrfs_create_tree()
1213 	btrfs_set_root_level(&root->root_item, 0);  in btrfs_create_tree()
1214 	btrfs_set_root_refs(&root->root_item, 1);  in btrfs_create_tree()
1215 	btrfs_set_root_used(&root->root_item, leaf->len);  in btrfs_create_tree()
1216 	btrfs_set_root_last_snapshot(&root->root_item, 0);  in btrfs_create_tree()
1217 	btrfs_set_root_dirid(&root->root_item, 0);  in btrfs_create_tree()
1219 		generate_random_guid(root->root_item.uuid);  in btrfs_create_tree()
1221 		export_guid(root->root_item.uuid, &guid_null);  in btrfs_create_tree()
1222 	btrfs_set_root_drop_level(&root->root_item, 0);  in btrfs_create_tree()
1229 	ret = btrfs_insert_root(trans, tree_root, &key, &root->root_item);  in btrfs_create_tree()
1233 	return root;  in btrfs_create_tree()
1239 	btrfs_put_root(root);  in btrfs_create_tree()
1247 	struct btrfs_root *root;  in alloc_log_tree()  local
1249 	root = btrfs_alloc_root(fs_info, BTRFS_TREE_LOG_OBJECTID, GFP_NOFS);  in alloc_log_tree()
1250 	if (!root)  in alloc_log_tree()
1253 	root->root_key.objectid = BTRFS_TREE_LOG_OBJECTID;  in alloc_log_tree()
1254 	root->root_key.type = BTRFS_ROOT_ITEM_KEY;  in alloc_log_tree()
1255 	root->root_key.offset = BTRFS_TREE_LOG_OBJECTID;  in alloc_log_tree()
1257 	return root;  in alloc_log_tree()
1261 			      struct btrfs_root *root)  in btrfs_alloc_log_tree_node()  argument
1275 	leaf = btrfs_alloc_tree_block(trans, root, 0, BTRFS_TREE_LOG_OBJECTID,  in btrfs_alloc_log_tree_node()
1280 	root->node = leaf;  in btrfs_alloc_log_tree_node()
1282 	btrfs_mark_buffer_dirty(root->node);  in btrfs_alloc_log_tree_node()
1283 	btrfs_tree_unlock(root->node);  in btrfs_alloc_log_tree_node()
1312 		       struct btrfs_root *root)  in btrfs_add_log_tree()  argument
1314 	struct btrfs_fs_info *fs_info = root->fs_info;  in btrfs_add_log_tree()
1330 	log_root->root_key.offset = root->root_key.objectid;  in btrfs_add_log_tree()
1342 	WARN_ON(root->log_root);  in btrfs_add_log_tree()
1343 	root->log_root = log_root;  in btrfs_add_log_tree()
1344 	root->log_transid = 0;  in btrfs_add_log_tree()
1345 	root->log_transid_committed = -1;  in btrfs_add_log_tree()
1346 	root->last_log_commit = 0;  in btrfs_add_log_tree()
1354 	struct btrfs_root *root;  in read_tree_root_path()  local
1360 	root = btrfs_alloc_root(fs_info, key->objectid, GFP_NOFS);  in read_tree_root_path()
1361 	if (!root)  in read_tree_root_path()
1365 			      &root->root_item, &root->root_key);  in read_tree_root_path()
1372 	generation = btrfs_root_generation(&root->root_item);  in read_tree_root_path()
1373 	level = btrfs_root_level(&root->root_item);  in read_tree_root_path()
1374 	root->node = read_tree_block(fs_info,  in read_tree_root_path()
1375 				     btrfs_root_bytenr(&root->root_item),  in read_tree_root_path()
1377 	if (IS_ERR(root->node)) {  in read_tree_root_path()
1378 		ret = PTR_ERR(root->node);  in read_tree_root_path()
1379 		root->node = NULL;  in read_tree_root_path()
1382 	if (!btrfs_buffer_uptodate(root->node, generation, 0)) {  in read_tree_root_path()
1392 	    root->root_key.objectid != BTRFS_TREE_LOG_OBJECTID &&  in read_tree_root_path()
1393 	    root->root_key.objectid != BTRFS_TREE_RELOC_OBJECTID &&  in read_tree_root_path()
1394 	    root->root_key.objectid != btrfs_header_owner(root->node)) {  in read_tree_root_path()
1397 			   root->root_key.objectid, root->node->start,  in read_tree_root_path()
1398 			   btrfs_header_owner(root->node),  in read_tree_root_path()
1399 			   root->root_key.objectid);  in read_tree_root_path()
1403 	root->commit_root = btrfs_root_node(root);  in read_tree_root_path()
1404 	return root;  in read_tree_root_path()
1406 	btrfs_put_root(root);  in read_tree_root_path()
1413 	struct btrfs_root *root;  in btrfs_read_tree_root()  local
1419 	root = read_tree_root_path(tree_root, path, key);  in btrfs_read_tree_root()
1422 	return root;  in btrfs_read_tree_root()
1430 static int btrfs_init_fs_root(struct btrfs_root *root, dev_t anon_dev)  in btrfs_init_fs_root()  argument
1440 	ret = btrfs_drew_lock_init(&root->snapshot_lock);  in btrfs_init_fs_root()
1445 	if (root->root_key.objectid != BTRFS_TREE_LOG_OBJECTID &&  in btrfs_init_fs_root()
1446 	    !btrfs_is_data_reloc_root(root)) {  in btrfs_init_fs_root()
1447 		set_bit(BTRFS_ROOT_SHAREABLE, &root->state);  in btrfs_init_fs_root()
1448 		btrfs_check_and_init_root_item(&root->root_item);  in btrfs_init_fs_root()
1455 	if (is_fstree(root->root_key.objectid) &&  in btrfs_init_fs_root()
1456 	    btrfs_root_refs(&root->root_item) > 0) {  in btrfs_init_fs_root()
1458 			ret = get_anon_bdev(&root->anon_dev);  in btrfs_init_fs_root()
1462 			root->anon_dev = anon_dev;  in btrfs_init_fs_root()
1466 	mutex_lock(&root->objectid_mutex);  in btrfs_init_fs_root()
1467 	ret = btrfs_init_root_free_objectid(root);  in btrfs_init_fs_root()
1469 		mutex_unlock(&root->objectid_mutex);  in btrfs_init_fs_root()
1473 	ASSERT(root->free_objectid <= BTRFS_LAST_FREE_OBJECTID);  in btrfs_init_fs_root()
1475 	mutex_unlock(&root->objectid_mutex);  in btrfs_init_fs_root()
1486 	struct btrfs_root *root;  in btrfs_lookup_fs_root()  local
1489 	root = radix_tree_lookup(&fs_info->fs_roots_radix,  in btrfs_lookup_fs_root()
1491 	if (root)  in btrfs_lookup_fs_root()
1492 		root = btrfs_grab_root(root);  in btrfs_lookup_fs_root()
1494 	return root;  in btrfs_lookup_fs_root()
1526 		struct btrfs_root *root = btrfs_global_root(fs_info, &key);  in btrfs_get_global_root()  local
1528 		return btrfs_grab_root(root) ? root : ERR_PTR(-ENOENT);  in btrfs_get_global_root()
1534 			 struct btrfs_root *root)  in btrfs_insert_fs_root()  argument
1544 				(unsigned long)root->root_key.objectid,  in btrfs_insert_fs_root()
1545 				root);  in btrfs_insert_fs_root()
1547 		btrfs_grab_root(root);  in btrfs_insert_fs_root()
1548 		set_bit(BTRFS_ROOT_IN_RADIX, &root->state);  in btrfs_insert_fs_root()
1559 	struct btrfs_root *root;  in btrfs_check_leaked_roots()  local
1564 		root = list_first_entry(&fs_info->allocated_roots,  in btrfs_check_leaked_roots()
1567 			  btrfs_root_name(&root->root_key, buf),  in btrfs_check_leaked_roots()
1568 			  refcount_read(&root->refs));  in btrfs_check_leaked_roots()
1569 		while (refcount_read(&root->refs) > 1)  in btrfs_check_leaked_roots()
1570 			btrfs_put_root(root);  in btrfs_check_leaked_roots()
1571 		btrfs_put_root(root);  in btrfs_check_leaked_roots()
1578 	struct btrfs_root *root;  in free_global_roots()  local
1582 		root = rb_entry(node, struct btrfs_root, rb_node);  in free_global_roots()
1583 		rb_erase(&root->rb_node, &fs_info->global_root_tree);  in free_global_roots()
1584 		btrfs_put_root(root);  in free_global_roots()
1639 	struct btrfs_root *root;  in btrfs_get_root_ref()  local
1644 	root = btrfs_get_global_root(fs_info, objectid);  in btrfs_get_root_ref()
1645 	if (root)  in btrfs_get_root_ref()
1646 		return root;  in btrfs_get_root_ref()
1648 	root = btrfs_lookup_fs_root(fs_info, objectid);  in btrfs_get_root_ref()
1649 	if (root) {  in btrfs_get_root_ref()
1652 		if (check_ref && btrfs_root_refs(&root->root_item) == 0) {  in btrfs_get_root_ref()
1653 			btrfs_put_root(root);  in btrfs_get_root_ref()
1656 		return root;  in btrfs_get_root_ref()
1662 	root = btrfs_read_tree_root(fs_info->tree_root, &key);  in btrfs_get_root_ref()
1663 	if (IS_ERR(root))  in btrfs_get_root_ref()
1664 		return root;  in btrfs_get_root_ref()
1666 	if (check_ref && btrfs_root_refs(&root->root_item) == 0) {  in btrfs_get_root_ref()
1671 	ret = btrfs_init_fs_root(root, anon_dev);  in btrfs_get_root_ref()
1689 		set_bit(BTRFS_ROOT_ORPHAN_ITEM_INSERTED, &root->state);  in btrfs_get_root_ref()
1691 	ret = btrfs_insert_fs_root(fs_info, root);  in btrfs_get_root_ref()
1694 			btrfs_put_root(root);  in btrfs_get_root_ref()
1699 	return root;  in btrfs_get_root_ref()
1708 		root->anon_dev = 0;  in btrfs_get_root_ref()
1709 	btrfs_put_root(root);  in btrfs_get_root_ref()
1758 	struct btrfs_root *root;  in btrfs_get_fs_root_commit_root()  local
1769 	root = btrfs_get_global_root(fs_info, objectid);  in btrfs_get_fs_root_commit_root()
1770 	if (root)  in btrfs_get_fs_root_commit_root()
1771 		return root;  in btrfs_get_fs_root_commit_root()
1773 	root = btrfs_lookup_fs_root(fs_info, objectid);  in btrfs_get_fs_root_commit_root()
1774 	if (root)  in btrfs_get_fs_root_commit_root()
1775 		return root;  in btrfs_get_fs_root_commit_root()
1780 	root = read_tree_root_path(fs_info->tree_root, path, &key);  in btrfs_get_fs_root_commit_root()
1783 	return root;  in btrfs_get_fs_root_commit_root()
1862 	struct btrfs_root *root = arg;  in transaction_kthread()  local
1863 	struct btrfs_fs_info *fs_info = root->fs_info;  in transaction_kthread()
1897 		trans = btrfs_attach_transaction(root);  in transaction_kthread()
2110 static void free_root_extent_buffers(struct btrfs_root *root)  in free_root_extent_buffers()  argument
2112 	if (root) {  in free_root_extent_buffers()
2113 		free_extent_buffer(root->node);  in free_root_extent_buffers()
2114 		free_extent_buffer(root->commit_root);  in free_root_extent_buffers()
2115 		root->node = NULL;  in free_root_extent_buffers()
2116 		root->commit_root = NULL;  in free_root_extent_buffers()
2122 	struct btrfs_root *root, *tmp;  in free_global_root_pointers()  local
2124 	rbtree_postorder_for_each_entry_safe(root, tmp,  in free_global_root_pointers()
2127 		free_root_extent_buffers(root);  in free_global_root_pointers()
2146 void btrfs_put_root(struct btrfs_root *root)  in btrfs_put_root()  argument
2148 	if (!root)  in btrfs_put_root()
2151 	if (refcount_dec_and_test(&root->refs)) {  in btrfs_put_root()
2152 		WARN_ON(!RB_EMPTY_ROOT(&root->inode_tree));  in btrfs_put_root()
2153 		WARN_ON(test_bit(BTRFS_ROOT_DEAD_RELOC_TREE, &root->state));  in btrfs_put_root()
2154 		if (root->anon_dev)  in btrfs_put_root()
2155 			free_anon_bdev(root->anon_dev);  in btrfs_put_root()
2156 		btrfs_drew_lock_destroy(&root->snapshot_lock);  in btrfs_put_root()
2157 		free_root_extent_buffers(root);  in btrfs_put_root()
2159 		spin_lock(&root->fs_info->fs_roots_radix_lock);  in btrfs_put_root()
2160 		list_del_init(&root->leak_list);  in btrfs_put_root()
2161 		spin_unlock(&root->fs_info->fs_roots_radix_lock);  in btrfs_put_root()
2163 		kfree(root);  in btrfs_put_root()
2237 	BTRFS_I(inode)->root = btrfs_grab_root(fs_info->tree_root);  in btrfs_init_btree_inode()
2408 	struct btrfs_root *root;  in load_global_roots_objectid()  local
2453 		root = read_tree_root_path(tree_root, path, &key);  in load_global_roots_objectid()
2454 		if (IS_ERR(root)) {  in load_global_roots_objectid()
2456 				ret = PTR_ERR(root);  in load_global_roots_objectid()
2459 		set_bit(BTRFS_ROOT_TRACK_DIRTY, &root->state);  in load_global_roots_objectid()
2460 		ret = btrfs_global_root_insert(root);  in load_global_roots_objectid()
2462 			btrfs_put_root(root);  in load_global_roots_objectid()
2515 	struct btrfs_root *root;  in btrfs_read_roots()  local
2530 		root = btrfs_read_tree_root(tree_root, &location);  in btrfs_read_roots()
2531 		if (IS_ERR(root)) {  in btrfs_read_roots()
2533 				ret = PTR_ERR(root);  in btrfs_read_roots()
2537 			set_bit(BTRFS_ROOT_TRACK_DIRTY, &root->state);  in btrfs_read_roots()
2538 			fs_info->block_group_root = root;  in btrfs_read_roots()
2543 	root = btrfs_read_tree_root(tree_root, &location);  in btrfs_read_roots()
2544 	if (IS_ERR(root)) {  in btrfs_read_roots()
2546 			ret = PTR_ERR(root);  in btrfs_read_roots()
2550 		set_bit(BTRFS_ROOT_TRACK_DIRTY, &root->state);  in btrfs_read_roots()
2551 		fs_info->dev_root = root;  in btrfs_read_roots()
2562 	root = btrfs_get_fs_root(tree_root->fs_info,  in btrfs_read_roots()
2564 	if (IS_ERR(root)) {  in btrfs_read_roots()
2566 			ret = PTR_ERR(root);  in btrfs_read_roots()
2570 		set_bit(BTRFS_ROOT_TRACK_DIRTY, &root->state);  in btrfs_read_roots()
2571 		fs_info->data_reloc_root = root;  in btrfs_read_roots()
2575 	root = btrfs_read_tree_root(tree_root, &location);  in btrfs_read_roots()
2576 	if (!IS_ERR(root)) {  in btrfs_read_roots()
2577 		set_bit(BTRFS_ROOT_TRACK_DIRTY, &root->state);  in btrfs_read_roots()
2579 		fs_info->quota_root = root;  in btrfs_read_roots()
2583 	root = btrfs_read_tree_root(tree_root, &location);  in btrfs_read_roots()
2584 	if (IS_ERR(root)) {  in btrfs_read_roots()
2586 			ret = PTR_ERR(root);  in btrfs_read_roots()
2591 		set_bit(BTRFS_ROOT_TRACK_DIRTY, &root->state);  in btrfs_read_roots()
2592 		fs_info->uuid_root = root;  in btrfs_read_roots()
2847 static int load_super_root(struct btrfs_root *root, u64 bytenr, u64 gen, int level)  in load_super_root()  argument
2851 	root->node = read_tree_block(root->fs_info, bytenr,  in load_super_root()
2852 				     root->root_key.objectid, gen, level, NULL);  in load_super_root()
2853 	if (IS_ERR(root->node)) {  in load_super_root()
2854 		ret = PTR_ERR(root->node);  in load_super_root()
2855 		root->node = NULL;  in load_super_root()
2858 	if (!extent_buffer_uptodate(root->node)) {  in load_super_root()
2859 		free_extent_buffer(root->node);  in load_super_root()
2860 		root->node = NULL;  in load_super_root()
2864 	btrfs_set_root_node(&root->root_item, root->node);  in load_super_root()
2865 	root->commit_root = btrfs_root_node(root);  in load_super_root()
2866 	btrfs_set_root_refs(&root->root_item, 1);  in load_super_root()
4409 				  struct btrfs_root *root)  in btrfs_drop_and_free_fs_root()  argument
4415 			  (unsigned long)root->root_key.objectid);  in btrfs_drop_and_free_fs_root()
4416 	if (test_and_clear_bit(BTRFS_ROOT_IN_RADIX, &root->state))  in btrfs_drop_and_free_fs_root()
4421 		ASSERT(root->log_root == NULL);  in btrfs_drop_and_free_fs_root()
4422 		if (root->reloc_root) {  in btrfs_drop_and_free_fs_root()
4423 			btrfs_put_root(root->reloc_root);  in btrfs_drop_and_free_fs_root()
4424 			root->reloc_root = NULL;  in btrfs_drop_and_free_fs_root()
4429 		btrfs_put_root(root);  in btrfs_drop_and_free_fs_root()
4484 	struct btrfs_root *root = fs_info->tree_root;  in btrfs_commit_super()  local
4496 	trans = btrfs_join_transaction(root);  in btrfs_commit_super()
4854 static void btrfs_destroy_ordered_extents(struct btrfs_root *root)  in btrfs_destroy_ordered_extents()  argument
4858 	spin_lock(&root->ordered_extent_lock);  in btrfs_destroy_ordered_extents()
4863 	list_for_each_entry(ordered, &root->ordered_extents,  in btrfs_destroy_ordered_extents()
4866 	spin_unlock(&root->ordered_extent_lock);  in btrfs_destroy_ordered_extents()
4871 	struct btrfs_root *root;  in btrfs_destroy_all_ordered_extents()  local
4879 		root = list_first_entry(&splice, struct btrfs_root,  in btrfs_destroy_all_ordered_extents()
4881 		list_move_tail(&root->ordered_root,  in btrfs_destroy_all_ordered_extents()
4885 		btrfs_destroy_ordered_extents(root);  in btrfs_destroy_all_ordered_extents()
4981 static void btrfs_destroy_delalloc_inodes(struct btrfs_root *root)  in btrfs_destroy_delalloc_inodes()  argument
4988 	spin_lock(&root->delalloc_lock);  in btrfs_destroy_delalloc_inodes()
4989 	list_splice_init(&root->delalloc_inodes, &splice);  in btrfs_destroy_delalloc_inodes()
4995 		__btrfs_del_delalloc_inode(root, btrfs_inode);  in btrfs_destroy_delalloc_inodes()
4996 		spin_unlock(&root->delalloc_lock);  in btrfs_destroy_delalloc_inodes()
5007 		spin_lock(&root->delalloc_lock);  in btrfs_destroy_delalloc_inodes()
5009 	spin_unlock(&root->delalloc_lock);  in btrfs_destroy_delalloc_inodes()
5014 	struct btrfs_root *root;  in btrfs_destroy_all_delalloc_inodes()  local
5022 		root = list_first_entry(&splice, struct btrfs_root,  in btrfs_destroy_all_delalloc_inodes()
5024 		root = btrfs_grab_root(root);  in btrfs_destroy_all_delalloc_inodes()
5025 		BUG_ON(!root);  in btrfs_destroy_all_delalloc_inodes()
5028 		btrfs_destroy_delalloc_inodes(root);  in btrfs_destroy_all_delalloc_inodes()
5029 		btrfs_put_root(root);  in btrfs_destroy_all_delalloc_inodes()
5252 int btrfs_init_root_free_objectid(struct btrfs_root *root)  in btrfs_init_root_free_objectid()  argument
5268 	ret = btrfs_search_slot(NULL, root, &search_key, path, 0, 0);  in btrfs_init_root_free_objectid()
5276 		root->free_objectid = max_t(u64, found_key.objectid + 1,  in btrfs_init_root_free_objectid()
5279 		root->free_objectid = BTRFS_FIRST_FREE_OBJECTID;  in btrfs_init_root_free_objectid()
5287 int btrfs_get_free_objectid(struct btrfs_root *root, u64 *objectid)  in btrfs_get_free_objectid()  argument
5290 	mutex_lock(&root->objectid_mutex);  in btrfs_get_free_objectid()
5292 	if (unlikely(root->free_objectid >= BTRFS_LAST_FREE_OBJECTID)) {  in btrfs_get_free_objectid()
5293 		btrfs_warn(root->fs_info,  in btrfs_get_free_objectid()
5295 			   root->root_key.objectid);  in btrfs_get_free_objectid()
5300 	*objectid = root->free_objectid++;  in btrfs_get_free_objectid()
5303 	mutex_unlock(&root->objectid_mutex);  in btrfs_get_free_objectid()