248 	struct extent_buffer *cow;  in btrfs_copy_root()  local
267 	cow = btrfs_alloc_tree_block(trans, root, 0, new_root_objectid,  in btrfs_copy_root()
270 	if (IS_ERR(cow))  in btrfs_copy_root()
271 		return PTR_ERR(cow);  in btrfs_copy_root()
273 	copy_extent_buffer_full(cow, buf);  in btrfs_copy_root()
274 	btrfs_set_header_bytenr(cow, cow->start);  in btrfs_copy_root()
275 	btrfs_set_header_generation(cow, trans->transid);  in btrfs_copy_root()
276 	btrfs_set_header_backref_rev(cow, BTRFS_MIXED_BACKREF_REV);  in btrfs_copy_root()
277 	btrfs_clear_header_flag(cow, BTRFS_HEADER_FLAG_WRITTEN |  in btrfs_copy_root()
280 		btrfs_set_header_flag(cow, BTRFS_HEADER_FLAG_RELOC);  in btrfs_copy_root()
282 		btrfs_set_header_owner(cow, new_root_objectid);  in btrfs_copy_root()
284 	write_extent_buffer_fsid(cow, fs_info->fs_devices->metadata_uuid);  in btrfs_copy_root()
288 		ret = btrfs_inc_ref(trans, root, cow, 1);  in btrfs_copy_root()
290 		ret = btrfs_inc_ref(trans, root, cow, 0);  in btrfs_copy_root()
292 		btrfs_tree_unlock(cow);  in btrfs_copy_root()
293 		free_extent_buffer(cow);  in btrfs_copy_root()
298 	btrfs_mark_buffer_dirty(trans, cow);  in btrfs_copy_root()
299 	*cow_ret = cow;  in btrfs_copy_root()
346 				       struct extent_buffer *cow,  in update_ref_for_cow()  argument
420 				ret = btrfs_inc_ref(trans, root, cow, 1);  in update_ref_for_cow()
431 				ret = btrfs_inc_ref(trans, root, cow, 1);  in update_ref_for_cow()
433 				ret = btrfs_inc_ref(trans, root, cow, 0);  in update_ref_for_cow()
440 				ret = btrfs_inc_ref(trans, root, cow, 1);  in update_ref_for_cow()
442 				ret = btrfs_inc_ref(trans, root, cow, 0);  in update_ref_for_cow()
477 	struct extent_buffer *cow;  in btrfs_force_cow_block()  local
506 	cow = btrfs_alloc_tree_block(trans, root, parent_start,  in btrfs_force_cow_block()
509 	if (IS_ERR(cow))  in btrfs_force_cow_block()
510 		return PTR_ERR(cow);  in btrfs_force_cow_block()
514 	copy_extent_buffer_full(cow, buf);  in btrfs_force_cow_block()
515 	btrfs_set_header_bytenr(cow, cow->start);  in btrfs_force_cow_block()
516 	btrfs_set_header_generation(cow, trans->transid);  in btrfs_force_cow_block()
517 	btrfs_set_header_backref_rev(cow, BTRFS_MIXED_BACKREF_REV);  in btrfs_force_cow_block()
518 	btrfs_clear_header_flag(cow, BTRFS_HEADER_FLAG_WRITTEN |  in btrfs_force_cow_block()
521 		btrfs_set_header_flag(cow, BTRFS_HEADER_FLAG_RELOC);  in btrfs_force_cow_block()
523 		btrfs_set_header_owner(cow, btrfs_root_id(root));  in btrfs_force_cow_block()
525 	write_extent_buffer_fsid(cow, fs_info->fs_devices->metadata_uuid);  in btrfs_force_cow_block()
527 	ret = update_ref_for_cow(trans, root, buf, cow, &last_ref);  in btrfs_force_cow_block()
534 		ret = btrfs_reloc_cow_block(trans, root, buf, cow);  in btrfs_force_cow_block()
547 		ret = btrfs_tree_mod_log_insert_root(root->node, cow, true);  in btrfs_force_cow_block()
552 		atomic_inc(&cow->refs);  in btrfs_force_cow_block()
553 		rcu_assign_pointer(root->node, cow);  in btrfs_force_cow_block()
572 					cow->start);  in btrfs_force_cow_block()
591 	trace_btrfs_cow_block(root, buf, cow);  in btrfs_force_cow_block()
595 	btrfs_mark_buffer_dirty(trans, cow);  in btrfs_force_cow_block()
596 	*cow_ret = cow;  in btrfs_force_cow_block()
600 	btrfs_tree_unlock(cow);  in btrfs_force_cow_block()
601 	free_extent_buffer(cow);  in btrfs_force_cow_block()
1979 		      int ins_len, int cow)  in btrfs_search_slot()  argument
2003 	BUG_ON(!cow && ins_len);  in btrfs_search_slot()
2010 	ASSERT(!p->nowait || !cow);  in btrfs_search_slot()
2028 	if (!cow)  in btrfs_search_slot()
2031 	if (cow && (p->keep_locks || p->lowest_level))  in btrfs_search_slot()
2059 		if (cow) {  in btrfs_search_slot()