203 	struct extent_buffer *cow;  in btrfs_copy_root()  local
219 	cow = btrfs_alloc_tree_block(trans, root, 0, new_root_objectid,  in btrfs_copy_root()
222 	if (IS_ERR(cow))  in btrfs_copy_root()
223 		return PTR_ERR(cow);  in btrfs_copy_root()
225 	copy_extent_buffer_full(cow, buf);  in btrfs_copy_root()
226 	btrfs_set_header_bytenr(cow, cow->start);  in btrfs_copy_root()
227 	btrfs_set_header_generation(cow, trans->transid);  in btrfs_copy_root()
228 	btrfs_set_header_backref_rev(cow, BTRFS_MIXED_BACKREF_REV);  in btrfs_copy_root()
229 	btrfs_clear_header_flag(cow, BTRFS_HEADER_FLAG_WRITTEN |  in btrfs_copy_root()
232 		btrfs_set_header_flag(cow, BTRFS_HEADER_FLAG_RELOC);  in btrfs_copy_root()
234 		btrfs_set_header_owner(cow, new_root_objectid);  in btrfs_copy_root()
236 	write_extent_buffer_fsid(cow, fs_info->fs_devices->metadata_uuid);  in btrfs_copy_root()
240 		ret = btrfs_inc_ref(trans, root, cow, 1);  in btrfs_copy_root()
242 		ret = btrfs_inc_ref(trans, root, cow, 0);  in btrfs_copy_root()
244 		btrfs_tree_unlock(cow);  in btrfs_copy_root()
245 		free_extent_buffer(cow);  in btrfs_copy_root()
250 	btrfs_mark_buffer_dirty(cow);  in btrfs_copy_root()
251 	*cow_ret = cow;  in btrfs_copy_root()
279 				       struct extent_buffer *cow,  in update_ref_for_cow()  argument
343 				ret = btrfs_inc_ref(trans, root, cow, 1);  in update_ref_for_cow()
352 				ret = btrfs_inc_ref(trans, root, cow, 1);  in update_ref_for_cow()
354 				ret = btrfs_inc_ref(trans, root, cow, 0);  in update_ref_for_cow()
370 				ret = btrfs_inc_ref(trans, root, cow, 1);  in update_ref_for_cow()
372 				ret = btrfs_inc_ref(trans, root, cow, 0);  in update_ref_for_cow()
407 	struct extent_buffer *cow;  in __btrfs_cow_block()  local
433 	cow = btrfs_alloc_tree_block(trans, root, parent_start,  in __btrfs_cow_block()
436 	if (IS_ERR(cow))  in __btrfs_cow_block()
437 		return PTR_ERR(cow);  in __btrfs_cow_block()
441 	copy_extent_buffer_full(cow, buf);  in __btrfs_cow_block()
442 	btrfs_set_header_bytenr(cow, cow->start);  in __btrfs_cow_block()
443 	btrfs_set_header_generation(cow, trans->transid);  in __btrfs_cow_block()
444 	btrfs_set_header_backref_rev(cow, BTRFS_MIXED_BACKREF_REV);  in __btrfs_cow_block()
445 	btrfs_clear_header_flag(cow, BTRFS_HEADER_FLAG_WRITTEN |  in __btrfs_cow_block()
448 		btrfs_set_header_flag(cow, BTRFS_HEADER_FLAG_RELOC);  in __btrfs_cow_block()
450 		btrfs_set_header_owner(cow, root->root_key.objectid);  in __btrfs_cow_block()
452 	write_extent_buffer_fsid(cow, fs_info->fs_devices->metadata_uuid);  in __btrfs_cow_block()
454 	ret = update_ref_for_cow(trans, root, buf, cow, &last_ref);  in __btrfs_cow_block()
456 		btrfs_tree_unlock(cow);  in __btrfs_cow_block()
457 		free_extent_buffer(cow);  in __btrfs_cow_block()
463 		ret = btrfs_reloc_cow_block(trans, root, buf, cow);  in __btrfs_cow_block()
465 			btrfs_tree_unlock(cow);  in __btrfs_cow_block()
466 			free_extent_buffer(cow);  in __btrfs_cow_block()
478 		ret = btrfs_tree_mod_log_insert_root(root->node, cow, true);  in __btrfs_cow_block()
480 			btrfs_tree_unlock(cow);  in __btrfs_cow_block()
481 			free_extent_buffer(cow);  in __btrfs_cow_block()
485 		atomic_inc(&cow->refs);  in __btrfs_cow_block()
486 		rcu_assign_pointer(root->node, cow);  in __btrfs_cow_block()
497 					cow->start);  in __btrfs_cow_block()
504 				btrfs_tree_unlock(cow);  in __btrfs_cow_block()
505 				free_extent_buffer(cow);  in __btrfs_cow_block()
516 	btrfs_mark_buffer_dirty(cow);  in __btrfs_cow_block()
517 	*cow_ret = cow;  in __btrfs_cow_block()
1964 		      int ins_len, int cow)  in btrfs_search_slot()  argument
1982 	BUG_ON(!cow && ins_len);  in btrfs_search_slot()
1989 	ASSERT(!p->nowait || !cow);  in btrfs_search_slot()
2007 	if (!cow)  in btrfs_search_slot()
2010 	if (cow && (p->keep_locks || p->lowest_level))  in btrfs_search_slot()
2038 		if (cow) {  in btrfs_search_slot()