184 	struct extent_buffer *cow;  in btrfs_copy_root()  local
200 	cow = btrfs_alloc_tree_block(trans, root, 0, new_root_objectid,  in btrfs_copy_root()
203 	if (IS_ERR(cow))  in btrfs_copy_root()
204 		return PTR_ERR(cow);  in btrfs_copy_root()
206 	copy_extent_buffer_full(cow, buf);  in btrfs_copy_root()
207 	btrfs_set_header_bytenr(cow, cow->start);  in btrfs_copy_root()
208 	btrfs_set_header_generation(cow, trans->transid);  in btrfs_copy_root()
209 	btrfs_set_header_backref_rev(cow, BTRFS_MIXED_BACKREF_REV);  in btrfs_copy_root()
210 	btrfs_clear_header_flag(cow, BTRFS_HEADER_FLAG_WRITTEN |  in btrfs_copy_root()
213 		btrfs_set_header_flag(cow, BTRFS_HEADER_FLAG_RELOC);  in btrfs_copy_root()
215 		btrfs_set_header_owner(cow, new_root_objectid);  in btrfs_copy_root()
217 	write_extent_buffer_fsid(cow, fs_info->fs_devices->metadata_uuid);  in btrfs_copy_root()
221 		ret = btrfs_inc_ref(trans, root, cow, 1);  in btrfs_copy_root()
223 		ret = btrfs_inc_ref(trans, root, cow, 0);  in btrfs_copy_root()
225 		btrfs_tree_unlock(cow);  in btrfs_copy_root()
226 		free_extent_buffer(cow);  in btrfs_copy_root()
231 	btrfs_mark_buffer_dirty(cow);  in btrfs_copy_root()
232 	*cow_ret = cow;  in btrfs_copy_root()
851 				       struct extent_buffer *cow,  in update_ref_for_cow()  argument
915 				ret = btrfs_inc_ref(trans, root, cow, 1);  in update_ref_for_cow()
924 				ret = btrfs_inc_ref(trans, root, cow, 1);  in update_ref_for_cow()
926 				ret = btrfs_inc_ref(trans, root, cow, 0);  in update_ref_for_cow()
942 				ret = btrfs_inc_ref(trans, root, cow, 1);  in update_ref_for_cow()
944 				ret = btrfs_inc_ref(trans, root, cow, 0);  in update_ref_for_cow()
1022 	struct extent_buffer *cow;  in __btrfs_cow_block()  local
1048 	cow = alloc_tree_block_no_bg_flush(trans, root, parent_start, &disk_key,  in __btrfs_cow_block()
1050 	if (IS_ERR(cow))  in __btrfs_cow_block()
1051 		return PTR_ERR(cow);  in __btrfs_cow_block()
1055 	copy_extent_buffer_full(cow, buf);  in __btrfs_cow_block()
1056 	btrfs_set_header_bytenr(cow, cow->start);  in __btrfs_cow_block()
1057 	btrfs_set_header_generation(cow, trans->transid);  in __btrfs_cow_block()
1058 	btrfs_set_header_backref_rev(cow, BTRFS_MIXED_BACKREF_REV);  in __btrfs_cow_block()
1059 	btrfs_clear_header_flag(cow, BTRFS_HEADER_FLAG_WRITTEN |  in __btrfs_cow_block()
1062 		btrfs_set_header_flag(cow, BTRFS_HEADER_FLAG_RELOC);  in __btrfs_cow_block()
1064 		btrfs_set_header_owner(cow, root->root_key.objectid);  in __btrfs_cow_block()
1066 	write_extent_buffer_fsid(cow, fs_info->fs_devices->metadata_uuid);  in __btrfs_cow_block()
1068 	ret = update_ref_for_cow(trans, root, buf, cow, &last_ref);  in __btrfs_cow_block()
1070 		btrfs_tree_unlock(cow);  in __btrfs_cow_block()
1071 		free_extent_buffer(cow);  in __btrfs_cow_block()
1077 		ret = btrfs_reloc_cow_block(trans, root, buf, cow);  in __btrfs_cow_block()
1079 			btrfs_tree_unlock(cow);  in __btrfs_cow_block()
1080 			free_extent_buffer(cow);  in __btrfs_cow_block()
1092 		atomic_inc(&cow->refs);  in __btrfs_cow_block()
1093 		ret = tree_mod_log_insert_root(root->node, cow, 1);  in __btrfs_cow_block()
1095 		rcu_assign_pointer(root->node, cow);  in __btrfs_cow_block()
1106 					cow->start);  in __btrfs_cow_block()
1113 				btrfs_tree_unlock(cow);  in __btrfs_cow_block()
1114 				free_extent_buffer(cow);  in __btrfs_cow_block()
1125 	btrfs_mark_buffer_dirty(cow);  in __btrfs_cow_block()
1126 	*cow_ret = cow;  in __btrfs_cow_block()
2709 		      int ins_len, int cow)  in btrfs_search_slot()  argument
2726 	BUG_ON(!cow && ins_len);  in btrfs_search_slot()
2744 	if (!cow)  in btrfs_search_slot()
2747 	if (cow && (p->keep_locks || p->lowest_level))  in btrfs_search_slot()
2765 		if (cow) {  in btrfs_search_slot()