476 static int update_backref_cache(struct btrfs_trans_handle *trans,  in update_backref_cache()  argument
483 		cache->last_trans = trans->transid;  in update_backref_cache()
487 	if (cache->last_trans == trans->transid)  in update_backref_cache()
1186 static int clone_backref_node(struct btrfs_trans_handle *trans,  argument
1200 		update_backref_cache(trans, cache);
1366 static struct btrfs_root *create_reloc_root(struct btrfs_trans_handle *trans,  argument
1385 		ret = btrfs_copy_root(trans, root, root->commit_root, &eb,
1391 					     trans->transid - 1);
1400 		ret = btrfs_copy_root(trans, root, root->node, &eb,
1408 	btrfs_set_root_generation(root_item, trans->transid);
1420 		btrfs_set_root_otransid(root_item, trans->transid);
1426 	ret = btrfs_insert_root(trans, root->fs_info->tree_root,
1433 	reloc_root->last_trans = trans->transid;
1441 int btrfs_init_reloc_root(struct btrfs_trans_handle *trans,  argument
1452 		reloc_root->last_trans = trans->transid;
1460 	if (!trans->reloc_reserved) {
1461 		rsv = trans->block_rsv;
1462 		trans->block_rsv = rc->block_rsv;
1465 	reloc_root = create_reloc_root(trans, root, root->root_key.objectid);
1467 		trans->block_rsv = rsv;
1478 int btrfs_update_reloc_root(struct btrfs_trans_handle *trans,  argument
1503 	ret = btrfs_update_root(trans, root->fs_info->tree_root,
1626 int replace_file_extents(struct btrfs_trans_handle *trans,  argument
1716 		ret = btrfs_inc_extent_ref(trans, root, new_bytenr,
1721 			btrfs_abort_transaction(trans, root, ret);
1725 		ret = btrfs_free_extent(trans, root, bytenr, num_bytes,
1729 			btrfs_abort_transaction(trans, root, ret);
1761 int replace_path(struct btrfs_trans_handle *trans,  argument
1799 		ret = btrfs_cow_block(trans, dest, eb, NULL, 0, &eb);
1859 				ret = btrfs_cow_block(trans, dest, eb, parent,
1884 		ret = btrfs_search_slot(trans, src, &key, path, 0, 1);
1901 		ret = btrfs_inc_extent_ref(trans, src, old_bytenr, blocksize,
1905 		ret = btrfs_inc_extent_ref(trans, dest, new_bytenr, blocksize,
1910 		ret = btrfs_free_extent(trans, src, new_bytenr, blocksize,
1915 		ret = btrfs_free_extent(trans, dest, old_bytenr, blocksize,
2118 	struct btrfs_trans_handle *trans = NULL;  local
2173 		trans = btrfs_start_transaction(root, 0);
2174 		if (IS_ERR(trans)) {
2175 			err = PTR_ERR(trans);
2176 			trans = NULL;
2179 		trans->block_rsv = rc->block_rsv;
2196 			ret = replace_path(trans, root, reloc_root, path,
2224 		btrfs_end_transaction_throttle(trans, root);
2225 		trans = NULL;
2238 	ret = btrfs_cow_block(trans, root, leaf, NULL, 0, &leaf);
2251 		btrfs_update_reloc_root(trans, root);
2254 	if (trans)
2255 		btrfs_end_transaction_throttle(trans, root);
2270 	struct btrfs_trans_handle *trans;  local
2289 	trans = btrfs_join_transaction(rc->extent_root);
2290 	if (IS_ERR(trans)) {
2294 		return PTR_ERR(trans);
2299 			btrfs_end_transaction(trans, rc->extent_root);
2324 		btrfs_update_reloc_root(trans, root);
2332 		btrfs_commit_transaction(trans, rc->extent_root);
2334 		btrfs_end_transaction(trans, rc->extent_root);
2445 static int record_reloc_root_in_trans(struct btrfs_trans_handle *trans,  argument
2450 	if (reloc_root->last_trans == trans->transid)
2457 	return btrfs_record_root_in_trans(trans, root);
2461 struct btrfs_root *select_reloc_root(struct btrfs_trans_handle *trans,  argument
2479 			record_reloc_root_in_trans(trans, root);
2483 		btrfs_record_root_in_trans(trans, root);
2592 static int reserve_metadata_space(struct btrfs_trans_handle *trans,  argument
2603 	trans->block_rsv = rc->block_rsv;
2636 static int do_relocation(struct btrfs_trans_handle *trans,  argument
2662 		root = select_reloc_root(trans, rc, upper, edges);
2678 			ret = btrfs_search_slot(trans, root, key, path, 0, 1);
2726 			ret = btrfs_cow_block(trans, root, eb, upper->eb,
2739 						      trans->transid);
2742 			ret = btrfs_inc_extent_ref(trans, root,
2749 			ret = btrfs_drop_subtree(trans, root, eb, upper->eb);
2772 static int link_to_upper(struct btrfs_trans_handle *trans,  argument
2780 	return do_relocation(trans, rc, node, &key, path, 0);
2783 static int finish_pending_nodes(struct btrfs_trans_handle *trans,  argument
2801 				ret = link_to_upper(trans, rc, node, path);
2899 static int relocate_tree_block(struct btrfs_trans_handle *trans,  argument
2919 		ret = reserve_metadata_space(trans, rc, node);
2928 			btrfs_record_root_in_trans(trans, root);
2935 			ret = btrfs_search_slot(trans, root, key, path, 0, 1);
2943 		ret = do_relocation(trans, rc, node, key, path, 1);
2955 int relocate_tree_blocks(struct btrfs_trans_handle *trans,  argument
3001 		ret = relocate_tree_block(trans, rc, node, &block->key,
3011 	err = finish_pending_nodes(trans, rc, path, err);
3445 	struct btrfs_trans_handle *trans;  local
3468 	trans = btrfs_join_transaction(root);
3469 	if (IS_ERR(trans)) {
3470 		ret = PTR_ERR(trans);
3474 	ret = btrfs_truncate_free_space_cache(root, trans, block_group, inode);
3476 	btrfs_end_transaction(trans, root);
3871 	struct btrfs_trans_handle *trans;  local
3890 	trans = btrfs_join_transaction(rc->extent_root);
3891 	if (IS_ERR(trans)) {
3898 		return PTR_ERR(trans);
3900 	btrfs_commit_transaction(trans, rc->extent_root);
3908 	struct btrfs_trans_handle *trans = NULL;  local
3938 		trans = btrfs_start_transaction(rc->extent_root, 0);
3939 		if (IS_ERR(trans)) {
3940 			err = PTR_ERR(trans);
3941 			trans = NULL;
3945 		if (update_backref_cache(trans, &rc->backref_cache)) {
3946 			btrfs_end_transaction(trans, rc->extent_root);
4017 			ret = relocate_tree_blocks(trans, rc, &blocks);
4023 				rc->backref_cache.last_trans = trans->transid - 1;
4034 		btrfs_end_transaction_throttle(trans, rc->extent_root);
4036 		trans = NULL;
4049 	if (trans && progress && err == -ENOSPC) {
4050 		ret = btrfs_force_chunk_alloc(trans, rc->extent_root,
4063 	if (trans) {
4064 		btrfs_end_transaction_throttle(trans, rc->extent_root);
4090 	trans = btrfs_join_transaction(rc->extent_root);
4091 	if (IS_ERR(trans))
4092 		err = PTR_ERR(trans);
4094 		btrfs_commit_transaction(trans, rc->extent_root);
4101 static int __insert_orphan_inode(struct btrfs_trans_handle *trans,  argument
4113 	ret = btrfs_insert_empty_inode(trans, root, path, objectid);
4140 	struct btrfs_trans_handle *trans;  local
4150 	trans = btrfs_start_transaction(root, 6);
4151 	if (IS_ERR(trans))
4152 		return ERR_CAST(trans);
4158 	err = __insert_orphan_inode(trans, root, objectid);
4168 	err = btrfs_orphan_add(trans, inode);
4170 	btrfs_end_transaction(trans, root);
4304 	struct btrfs_trans_handle *trans;  local
4307 	trans = btrfs_start_transaction(root->fs_info->tree_root, 0);
4308 	if (IS_ERR(trans))
4309 		return PTR_ERR(trans);
4315 	ret = btrfs_update_root(trans, root->fs_info->tree_root,
4318 	err = btrfs_end_transaction(trans, root->fs_info->tree_root);
4339 	struct btrfs_trans_handle *trans;  local
4417 	trans = btrfs_join_transaction(rc->extent_root);
4418 	if (IS_ERR(trans)) {
4420 		err = PTR_ERR(trans);
4449 	err = btrfs_commit_transaction(trans, rc->extent_root);
4457 	trans = btrfs_join_transaction(rc->extent_root);
4458 	if (IS_ERR(trans))
4459 		err = PTR_ERR(trans);
4461 		err = btrfs_commit_transaction(trans, rc->extent_root);
4533 int btrfs_reloc_cow_block(struct btrfs_trans_handle *trans,  argument
4587 		ret = replace_file_extents(trans, rc, root, cow);
4628 int btrfs_reloc_post_snapshot(struct btrfs_trans_handle *trans,  argument
4652 	reloc_root = create_reloc_root(trans, root->reloc_root,
4662 		ret = clone_backref_node(trans, rc, root, reloc_root);