1 /*
2  * Copyright (C) 2015-2016 The Android Open Source Project
3  *
4  * Licensed under the Apache License, Version 2.0 (the "License");
5  * you may not use this file except in compliance with the License.
6  * You may obtain a copy of the License at
7  *
8  *      http://www.apache.org/licenses/LICENSE-2.0
9  *
10  * Unless required by applicable law or agreed to in writing, software
11  * distributed under the License is distributed on an "AS IS" BASIS,
12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13  * See the License for the specific language governing permissions and
14  * limitations under the License.
15  */
16 
17 #pragma once
18 
19 #include "block_tree.h"
20 
21 struct block_map {
22     struct block_tree tree;
23 };
24 
25 #define BLOCK_MAP_INITIAL_VALUE(block_map) \
26     { .tree = BLOCK_TREE_INITIAL_VALUE(block_map.tree), }
27 
28 struct block_map_path {
29     struct block_tree_path path;
30 };
31 
32 void block_map_init(const struct transaction* tr,
33                     struct block_map* block_map,
34                     const struct block_mac* root,
35                     size_t block_size);
36 
37 bool block_map_get(struct transaction* tr,
38                    struct block_map* block_map,
39                    data_block_t index,
40                    struct block_mac* block_mac);
41 
42 void block_map_set(struct transaction* tr,
43                    struct block_map* block_map,
44                    data_block_t index,
45                    const struct block_mac* block_mac);
46 
47 void block_map_put_dirty(struct transaction* tr,
48                          struct block_map* block_map,
49                          data_block_t index,
50                          void* data,
51                          struct obj_ref* data_ref);
52 
53 void block_map_truncate(struct transaction* tr,
54                         struct block_map* block_map,
55                         data_block_t index);
56 
57 bool block_map_check(struct transaction* tr,
58                      struct block_map* block_map,
59                      data_block_t count);
60 
61 void block_map_free(struct transaction* tr, struct block_map* block_map);
62