55 static void btrfs_destroy_ordered_extents(struct btrfs_root *root);
58 static void btrfs_destroy_delalloc_inodes(struct btrfs_root *root);
209 	struct btrfs_fs_info *fs_info = inode->root->fs_info;  in btree_get_extent()
585 	struct btrfs_root *root = BTRFS_I(page->mapping->host)->root;  in btree_readpage_end_io_hook()  local
586 	struct btrfs_fs_info *fs_info = root->fs_info;  in btree_readpage_end_io_hook()
820 	struct btrfs_root *root;  in btree_csum_one_bio()  local
825 		root = BTRFS_I(bvec->bv_page->mapping->host)->root;  in btree_csum_one_bio()
826 		ret = csum_dirty_buffer(root->fs_info, bvec->bv_page);  in btree_csum_one_bio()
933 		fs_info = BTRFS_I(mapping->host)->root->fs_info;  in btree_writepages()
967 		btrfs_warn(BTRFS_I(page->mapping->host)->root->fs_info,  in btree_invalidatepage()
1142 static void __setup_root(struct btrfs_root *root, struct btrfs_fs_info *fs_info,  in __setup_root()  argument
1146 	root->node = NULL;  in __setup_root()
1147 	root->commit_root = NULL;  in __setup_root()
1148 	root->state = 0;  in __setup_root()
1149 	root->orphan_cleanup_state = 0;  in __setup_root()
1151 	root->objectid = objectid;  in __setup_root()
1152 	root->last_trans = 0;  in __setup_root()
1153 	root->highest_objectid = 0;  in __setup_root()
1154 	root->nr_delalloc_inodes = 0;  in __setup_root()
1155 	root->nr_ordered_extents = 0;  in __setup_root()
1156 	root->inode_tree = RB_ROOT;  in __setup_root()
1157 	INIT_RADIX_TREE(&root->delayed_nodes_tree, GFP_ATOMIC);  in __setup_root()
1158 	root->block_rsv = NULL;  in __setup_root()
1160 	INIT_LIST_HEAD(&root->dirty_list);  in __setup_root()
1161 	INIT_LIST_HEAD(&root->root_list);  in __setup_root()
1162 	INIT_LIST_HEAD(&root->delalloc_inodes);  in __setup_root()
1163 	INIT_LIST_HEAD(&root->delalloc_root);  in __setup_root()
1164 	INIT_LIST_HEAD(&root->ordered_extents);  in __setup_root()
1165 	INIT_LIST_HEAD(&root->ordered_root);  in __setup_root()
1166 	INIT_LIST_HEAD(&root->logged_list[0]);  in __setup_root()
1167 	INIT_LIST_HEAD(&root->logged_list[1]);  in __setup_root()
1168 	spin_lock_init(&root->inode_lock);  in __setup_root()
1169 	spin_lock_init(&root->delalloc_lock);  in __setup_root()
1170 	spin_lock_init(&root->ordered_extent_lock);  in __setup_root()
1171 	spin_lock_init(&root->accounting_lock);  in __setup_root()
1172 	spin_lock_init(&root->log_extents_lock[0]);  in __setup_root()
1173 	spin_lock_init(&root->log_extents_lock[1]);  in __setup_root()
1174 	spin_lock_init(&root->qgroup_meta_rsv_lock);  in __setup_root()
1175 	mutex_init(&root->objectid_mutex);  in __setup_root()
1176 	mutex_init(&root->log_mutex);  in __setup_root()
1177 	mutex_init(&root->ordered_extent_mutex);  in __setup_root()
1178 	mutex_init(&root->delalloc_mutex);  in __setup_root()
1179 	init_waitqueue_head(&root->log_writer_wait);  in __setup_root()
1180 	init_waitqueue_head(&root->log_commit_wait[0]);  in __setup_root()
1181 	init_waitqueue_head(&root->log_commit_wait[1]);  in __setup_root()
1182 	INIT_LIST_HEAD(&root->log_ctxs[0]);  in __setup_root()
1183 	INIT_LIST_HEAD(&root->log_ctxs[1]);  in __setup_root()
1184 	atomic_set(&root->log_commit[0], 0);  in __setup_root()
1185 	atomic_set(&root->log_commit[1], 0);  in __setup_root()
1186 	atomic_set(&root->log_writers, 0);  in __setup_root()
1187 	atomic_set(&root->log_batch, 0);  in __setup_root()
1188 	refcount_set(&root->refs, 1);  in __setup_root()
1189 	atomic_set(&root->will_be_snapshotted, 0);  in __setup_root()
1190 	atomic_set(&root->snapshot_force_cow, 0);  in __setup_root()
1191 	root->log_transid = 0;  in __setup_root()
1192 	root->log_transid_committed = -1;  in __setup_root()
1193 	root->last_log_commit = 0;  in __setup_root()
1195 		extent_io_tree_init(&root->dirty_log_pages, NULL);  in __setup_root()
1197 	memset(&root->root_key, 0, sizeof(root->root_key));  in __setup_root()
1198 	memset(&root->root_item, 0, sizeof(root->root_item));  in __setup_root()
1199 	memset(&root->defrag_progress, 0, sizeof(root->defrag_progress));  in __setup_root()
1201 		root->defrag_trans_start = fs_info->generation;  in __setup_root()
1203 		root->defrag_trans_start = 0;  in __setup_root()
1204 	root->root_key.objectid = objectid;  in __setup_root()
1205 	root->anon_dev = 0;  in __setup_root()
1207 	spin_lock_init(&root->root_item_lock);  in __setup_root()
1213 	struct btrfs_root *root = kzalloc(sizeof(*root), flags);  in btrfs_alloc_root()  local
1214 	if (root)  in btrfs_alloc_root()
1215 		root->fs_info = fs_info;  in btrfs_alloc_root()
1216 	return root;  in btrfs_alloc_root()
1223 	struct btrfs_root *root;  in btrfs_alloc_dummy_root()  local
1228 	root = btrfs_alloc_root(fs_info, GFP_KERNEL);  in btrfs_alloc_dummy_root()
1229 	if (!root)  in btrfs_alloc_dummy_root()
1233 	__setup_root(root, fs_info, BTRFS_ROOT_TREE_OBJECTID);  in btrfs_alloc_dummy_root()
1234 	root->alloc_bytenr = 0;  in btrfs_alloc_dummy_root()
1236 	return root;  in btrfs_alloc_dummy_root()
1246 	struct btrfs_root *root;  in btrfs_create_tree()  local
1251 	root = btrfs_alloc_root(fs_info, GFP_KERNEL);  in btrfs_create_tree()
1252 	if (!root)  in btrfs_create_tree()
1255 	__setup_root(root, fs_info, objectid);  in btrfs_create_tree()
1256 	root->root_key.objectid = objectid;  in btrfs_create_tree()
1257 	root->root_key.type = BTRFS_ROOT_ITEM_KEY;  in btrfs_create_tree()
1258 	root->root_key.offset = 0;  in btrfs_create_tree()
1260 	leaf = btrfs_alloc_tree_block(trans, root, 0, objectid, NULL, 0, 0, 0);  in btrfs_create_tree()
1267 	root->node = leaf;  in btrfs_create_tree()
1270 	root->commit_root = btrfs_root_node(root);  in btrfs_create_tree()
1271 	set_bit(BTRFS_ROOT_TRACK_DIRTY, &root->state);  in btrfs_create_tree()
1273 	root->root_item.flags = 0;  in btrfs_create_tree()
1274 	root->root_item.byte_limit = 0;  in btrfs_create_tree()
1275 	btrfs_set_root_bytenr(&root->root_item, leaf->start);  in btrfs_create_tree()
1276 	btrfs_set_root_generation(&root->root_item, trans->transid);  in btrfs_create_tree()
1277 	btrfs_set_root_level(&root->root_item, 0);  in btrfs_create_tree()
1278 	btrfs_set_root_refs(&root->root_item, 1);  in btrfs_create_tree()
1279 	btrfs_set_root_used(&root->root_item, leaf->len);  in btrfs_create_tree()
1280 	btrfs_set_root_last_snapshot(&root->root_item, 0);  in btrfs_create_tree()
1281 	btrfs_set_root_dirid(&root->root_item, 0);  in btrfs_create_tree()
1284 	memcpy(root->root_item.uuid, uuid.b, BTRFS_UUID_SIZE);  in btrfs_create_tree()
1285 	root->root_item.drop_level = 0;  in btrfs_create_tree()
1290 	ret = btrfs_insert_root(trans, tree_root, &key, &root->root_item);  in btrfs_create_tree()
1296 	return root;  in btrfs_create_tree()
1301 		free_extent_buffer(root->commit_root);  in btrfs_create_tree()
1304 	kfree(root);  in btrfs_create_tree()
1312 	struct btrfs_root *root;  in alloc_log_tree()  local
1315 	root = btrfs_alloc_root(fs_info, GFP_NOFS);  in alloc_log_tree()
1316 	if (!root)  in alloc_log_tree()
1319 	__setup_root(root, fs_info, BTRFS_TREE_LOG_OBJECTID);  in alloc_log_tree()
1321 	root->root_key.objectid = BTRFS_TREE_LOG_OBJECTID;  in alloc_log_tree()
1322 	root->root_key.type = BTRFS_ROOT_ITEM_KEY;  in alloc_log_tree()
1323 	root->root_key.offset = BTRFS_TREE_LOG_OBJECTID;  in alloc_log_tree()
1334 	leaf = btrfs_alloc_tree_block(trans, root, 0, BTRFS_TREE_LOG_OBJECTID,  in alloc_log_tree()
1337 		kfree(root);  in alloc_log_tree()
1341 	root->node = leaf;  in alloc_log_tree()
1343 	btrfs_mark_buffer_dirty(root->node);  in alloc_log_tree()
1344 	btrfs_tree_unlock(root->node);  in alloc_log_tree()
1345 	return root;  in alloc_log_tree()
1362 		       struct btrfs_root *root)  in btrfs_add_log_tree()  argument
1364 	struct btrfs_fs_info *fs_info = root->fs_info;  in btrfs_add_log_tree()
1373 	log_root->root_key.offset = root->root_key.objectid;  in btrfs_add_log_tree()
1385 	WARN_ON(root->log_root);  in btrfs_add_log_tree()
1386 	root->log_root = log_root;  in btrfs_add_log_tree()
1387 	root->log_transid = 0;  in btrfs_add_log_tree()
1388 	root->log_transid_committed = -1;  in btrfs_add_log_tree()
1389 	root->last_log_commit = 0;  in btrfs_add_log_tree()
1396 	struct btrfs_root *root;  in btrfs_read_tree_root()  local
1407 	root = btrfs_alloc_root(fs_info, GFP_NOFS);  in btrfs_read_tree_root()
1408 	if (!root) {  in btrfs_read_tree_root()
1413 	__setup_root(root, fs_info, key->objectid);  in btrfs_read_tree_root()
1416 			      &root->root_item, &root->root_key);  in btrfs_read_tree_root()
1423 	generation = btrfs_root_generation(&root->root_item);  in btrfs_read_tree_root()
1424 	level = btrfs_root_level(&root->root_item);  in btrfs_read_tree_root()
1425 	root->node = read_tree_block(fs_info,  in btrfs_read_tree_root()
1426 				     btrfs_root_bytenr(&root->root_item),  in btrfs_read_tree_root()
1428 	if (IS_ERR(root->node)) {  in btrfs_read_tree_root()
1429 		ret = PTR_ERR(root->node);  in btrfs_read_tree_root()
1431 	} else if (!btrfs_buffer_uptodate(root->node, generation, 0)) {  in btrfs_read_tree_root()
1433 		free_extent_buffer(root->node);  in btrfs_read_tree_root()
1436 	root->commit_root = btrfs_root_node(root);  in btrfs_read_tree_root()
1439 	return root;  in btrfs_read_tree_root()
1442 	kfree(root);  in btrfs_read_tree_root()
1444 	root = ERR_PTR(ret);  in btrfs_read_tree_root()
1451 	struct btrfs_root *root;  in btrfs_read_fs_root()  local
1453 	root = btrfs_read_tree_root(tree_root, location);  in btrfs_read_fs_root()
1454 	if (IS_ERR(root))  in btrfs_read_fs_root()
1455 		return root;  in btrfs_read_fs_root()
1457 	if (root->root_key.objectid != BTRFS_TREE_LOG_OBJECTID) {  in btrfs_read_fs_root()
1458 		set_bit(BTRFS_ROOT_REF_COWS, &root->state);  in btrfs_read_fs_root()
1459 		btrfs_check_and_init_root_item(&root->root_item);  in btrfs_read_fs_root()
1462 	return root;  in btrfs_read_fs_root()
1465 int btrfs_init_fs_root(struct btrfs_root *root)  in btrfs_init_fs_root()  argument
1470 	root->free_ino_ctl = kzalloc(sizeof(*root->free_ino_ctl), GFP_NOFS);  in btrfs_init_fs_root()
1471 	root->free_ino_pinned = kzalloc(sizeof(*root->free_ino_pinned),  in btrfs_init_fs_root()
1473 	if (!root->free_ino_pinned || !root->free_ino_ctl) {  in btrfs_init_fs_root()
1483 	root->subv_writers = writers;  in btrfs_init_fs_root()
1485 	btrfs_init_free_ino_ctl(root);  in btrfs_init_fs_root()
1486 	spin_lock_init(&root->ino_cache_lock);  in btrfs_init_fs_root()
1487 	init_waitqueue_head(&root->ino_cache_wait);  in btrfs_init_fs_root()
1489 	ret = get_anon_bdev(&root->anon_dev);  in btrfs_init_fs_root()
1493 	mutex_lock(&root->objectid_mutex);  in btrfs_init_fs_root()
1494 	ret = btrfs_find_highest_objectid(root,  in btrfs_init_fs_root()
1495 					&root->highest_objectid);  in btrfs_init_fs_root()
1497 		mutex_unlock(&root->objectid_mutex);  in btrfs_init_fs_root()
1501 	ASSERT(root->highest_objectid <= BTRFS_LAST_FREE_OBJECTID);  in btrfs_init_fs_root()
1503 	mutex_unlock(&root->objectid_mutex);  in btrfs_init_fs_root()
1514 	struct btrfs_root *root;  in btrfs_lookup_fs_root()  local
1517 	root = radix_tree_lookup(&fs_info->fs_roots_radix,  in btrfs_lookup_fs_root()
1520 	return root;  in btrfs_lookup_fs_root()
1524 			 struct btrfs_root *root)  in btrfs_insert_fs_root()  argument
1534 				(unsigned long)root->root_key.objectid,  in btrfs_insert_fs_root()
1535 				root);  in btrfs_insert_fs_root()
1537 		set_bit(BTRFS_ROOT_IN_RADIX, &root->state);  in btrfs_insert_fs_root()
1548 	struct btrfs_root *root;  in btrfs_get_fs_root()  local
1573 	root = btrfs_lookup_fs_root(fs_info, location->objectid);  in btrfs_get_fs_root()
1574 	if (root) {  in btrfs_get_fs_root()
1575 		if (check_ref && btrfs_root_refs(&root->root_item) == 0)  in btrfs_get_fs_root()
1577 		return root;  in btrfs_get_fs_root()
1580 	root = btrfs_read_fs_root(fs_info->tree_root, location);  in btrfs_get_fs_root()
1581 	if (IS_ERR(root))  in btrfs_get_fs_root()
1582 		return root;  in btrfs_get_fs_root()
1584 	if (check_ref && btrfs_root_refs(&root->root_item) == 0) {  in btrfs_get_fs_root()
1589 	ret = btrfs_init_fs_root(root);  in btrfs_get_fs_root()
1607 		set_bit(BTRFS_ROOT_ORPHAN_ITEM_INSERTED, &root->state);  in btrfs_get_fs_root()
1609 	ret = btrfs_insert_fs_root(fs_info, root);  in btrfs_get_fs_root()
1612 			btrfs_free_fs_root(root);  in btrfs_get_fs_root()
1617 	return root;  in btrfs_get_fs_root()
1619 	btrfs_free_fs_root(root);  in btrfs_get_fs_root()
1665 	struct btrfs_root *root = arg;  in cleaner_kthread()  local
1666 	struct btrfs_fs_info *fs_info = root->fs_info;  in cleaner_kthread()
1700 		again = btrfs_clean_one_deleted_snapshot(root);  in cleaner_kthread()
1738 	trans = btrfs_attach_transaction(root);  in cleaner_kthread()
1759 	struct btrfs_root *root = arg;  in transaction_kthread()  local
1760 	struct btrfs_fs_info *fs_info = root->fs_info;  in transaction_kthread()
1793 		trans = btrfs_attach_transaction(root);  in transaction_kthread()
2046 static void free_root_extent_buffers(struct btrfs_root *root)  in free_root_extent_buffers()  argument
2048 	if (root) {  in free_root_extent_buffers()
2049 		free_extent_buffer(root->node);  in free_root_extent_buffers()
2050 		free_extent_buffer(root->commit_root);  in free_root_extent_buffers()
2051 		root->node = NULL;  in free_root_extent_buffers()
2052 		root->commit_root = NULL;  in free_root_extent_buffers()
2149 	BTRFS_I(inode)->root = fs_info->tree_root;  in btrfs_init_btree_inode()
2323 	struct btrfs_root *root;  in btrfs_read_roots()  local
2333 	root = btrfs_read_tree_root(tree_root, &location);  in btrfs_read_roots()
2334 	if (IS_ERR(root)) {  in btrfs_read_roots()
2335 		ret = PTR_ERR(root);  in btrfs_read_roots()
2338 	set_bit(BTRFS_ROOT_TRACK_DIRTY, &root->state);  in btrfs_read_roots()
2339 	fs_info->extent_root = root;  in btrfs_read_roots()
2342 	root = btrfs_read_tree_root(tree_root, &location);  in btrfs_read_roots()
2343 	if (IS_ERR(root)) {  in btrfs_read_roots()
2344 		ret = PTR_ERR(root);  in btrfs_read_roots()
2347 	set_bit(BTRFS_ROOT_TRACK_DIRTY, &root->state);  in btrfs_read_roots()
2348 	fs_info->dev_root = root;  in btrfs_read_roots()
2352 	root = btrfs_read_tree_root(tree_root, &location);  in btrfs_read_roots()
2353 	if (IS_ERR(root)) {  in btrfs_read_roots()
2354 		ret = PTR_ERR(root);  in btrfs_read_roots()
2357 	set_bit(BTRFS_ROOT_TRACK_DIRTY, &root->state);  in btrfs_read_roots()
2358 	fs_info->csum_root = root;  in btrfs_read_roots()
2361 	root = btrfs_read_tree_root(tree_root, &location);  in btrfs_read_roots()
2362 	if (!IS_ERR(root)) {  in btrfs_read_roots()
2363 		set_bit(BTRFS_ROOT_TRACK_DIRTY, &root->state);  in btrfs_read_roots()
2365 		fs_info->quota_root = root;  in btrfs_read_roots()
2369 	root = btrfs_read_tree_root(tree_root, &location);  in btrfs_read_roots()
2370 	if (IS_ERR(root)) {  in btrfs_read_roots()
2371 		ret = PTR_ERR(root);  in btrfs_read_roots()
2375 		set_bit(BTRFS_ROOT_TRACK_DIRTY, &root->state);  in btrfs_read_roots()
2376 		fs_info->uuid_root = root;  in btrfs_read_roots()
2381 		root = btrfs_read_tree_root(tree_root, &location);  in btrfs_read_roots()
2382 		if (IS_ERR(root)) {  in btrfs_read_roots()
2383 			ret = PTR_ERR(root);  in btrfs_read_roots()
2386 		set_bit(BTRFS_ROOT_TRACK_DIRTY, &root->state);  in btrfs_read_roots()
2387 		fs_info->free_space_root = root;  in btrfs_read_roots()
3817 				  struct btrfs_root *root)  in btrfs_drop_and_free_fs_root()  argument
3821 			  (unsigned long)root->root_key.objectid);  in btrfs_drop_and_free_fs_root()
3824 	if (btrfs_root_refs(&root->root_item) == 0)  in btrfs_drop_and_free_fs_root()
3828 		btrfs_free_log(NULL, root);  in btrfs_drop_and_free_fs_root()
3829 		if (root->reloc_root) {  in btrfs_drop_and_free_fs_root()
3830 			free_extent_buffer(root->reloc_root->node);  in btrfs_drop_and_free_fs_root()
3831 			free_extent_buffer(root->reloc_root->commit_root);  in btrfs_drop_and_free_fs_root()
3832 			btrfs_put_fs_root(root->reloc_root);  in btrfs_drop_and_free_fs_root()
3833 			root->reloc_root = NULL;  in btrfs_drop_and_free_fs_root()
3837 	if (root->free_ino_pinned)  in btrfs_drop_and_free_fs_root()
3838 		__btrfs_remove_free_space_cache(root->free_ino_pinned);  in btrfs_drop_and_free_fs_root()
3839 	if (root->free_ino_ctl)  in btrfs_drop_and_free_fs_root()
3840 		__btrfs_remove_free_space_cache(root->free_ino_ctl);  in btrfs_drop_and_free_fs_root()
3841 	btrfs_free_fs_root(root);  in btrfs_drop_and_free_fs_root()
3844 void btrfs_free_fs_root(struct btrfs_root *root)  in btrfs_free_fs_root()  argument
3846 	iput(root->ino_cache_inode);  in btrfs_free_fs_root()
3847 	WARN_ON(!RB_EMPTY_ROOT(&root->inode_tree));  in btrfs_free_fs_root()
3848 	if (root->anon_dev)  in btrfs_free_fs_root()
3849 		free_anon_bdev(root->anon_dev);  in btrfs_free_fs_root()
3850 	if (root->subv_writers)  in btrfs_free_fs_root()
3851 		btrfs_free_subvolume_writers(root->subv_writers);  in btrfs_free_fs_root()
3852 	free_extent_buffer(root->node);  in btrfs_free_fs_root()
3853 	free_extent_buffer(root->commit_root);  in btrfs_free_fs_root()
3854 	kfree(root->free_ino_ctl);  in btrfs_free_fs_root()
3855 	kfree(root->free_ino_pinned);  in btrfs_free_fs_root()
3856 	btrfs_put_fs_root(root);  in btrfs_free_fs_root()
3912 	struct btrfs_root *root = fs_info->tree_root;  in btrfs_commit_super()  local
3924 	trans = btrfs_join_transaction(root);  in btrfs_commit_super()
4057 	struct btrfs_root *root;  in btrfs_mark_buffer_dirty()  local
4070 	root = BTRFS_I(buf->pages[0]->mapping->host)->root;  in btrfs_mark_buffer_dirty()
4071 	fs_info = root->fs_info;  in btrfs_mark_buffer_dirty()
4131 	struct btrfs_root *root = BTRFS_I(buf->pages[0]->mapping->host)->root;  in btrfs_read_buffer()  local
4132 	struct btrfs_fs_info *fs_info = root->fs_info;  in btrfs_read_buffer()
4151 static void btrfs_destroy_ordered_extents(struct btrfs_root *root)  in btrfs_destroy_ordered_extents()  argument
4155 	spin_lock(&root->ordered_extent_lock);  in btrfs_destroy_ordered_extents()
4160 	list_for_each_entry(ordered, &root->ordered_extents,  in btrfs_destroy_ordered_extents()
4163 	spin_unlock(&root->ordered_extent_lock);  in btrfs_destroy_ordered_extents()
4168 	struct btrfs_root *root;  in btrfs_destroy_all_ordered_extents()  local
4176 		root = list_first_entry(&splice, struct btrfs_root,  in btrfs_destroy_all_ordered_extents()
4178 		list_move_tail(&root->ordered_root,  in btrfs_destroy_all_ordered_extents()
4182 		btrfs_destroy_ordered_extents(root);  in btrfs_destroy_all_ordered_extents()
4262 static void btrfs_destroy_delalloc_inodes(struct btrfs_root *root)  in btrfs_destroy_delalloc_inodes()  argument
4269 	spin_lock(&root->delalloc_lock);  in btrfs_destroy_delalloc_inodes()
4270 	list_splice_init(&root->delalloc_inodes, &splice);  in btrfs_destroy_delalloc_inodes()
4276 		__btrfs_del_delalloc_inode(root, btrfs_inode);  in btrfs_destroy_delalloc_inodes()
4277 		spin_unlock(&root->delalloc_lock);  in btrfs_destroy_delalloc_inodes()
4288 		spin_lock(&root->delalloc_lock);  in btrfs_destroy_delalloc_inodes()
4290 	spin_unlock(&root->delalloc_lock);  in btrfs_destroy_delalloc_inodes()
4295 	struct btrfs_root *root;  in btrfs_destroy_all_delalloc_inodes()  local
4303 		root = list_first_entry(&splice, struct btrfs_root,  in btrfs_destroy_all_delalloc_inodes()
4305 		root = btrfs_grab_fs_root(root);  in btrfs_destroy_all_delalloc_inodes()
4306 		BUG_ON(!root);  in btrfs_destroy_all_delalloc_inodes()
4309 		btrfs_destroy_delalloc_inodes(root);  in btrfs_destroy_all_delalloc_inodes()
4310 		btrfs_put_fs_root(root);  in btrfs_destroy_all_delalloc_inodes()