1 /*
2  * Copyright (C) 2019 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 <map>
20 #include <string>
21 
22 #include <android-base/result.h>
23 
24 #include "super_vbmeta_format.h"
25 
26 namespace android {
27 namespace fs_mgr {
28 
29 class SuperVBMetaBuilder {
30   public:
31     SuperVBMetaBuilder();
32     SuperVBMetaBuilder(const int super_vbmeta_fd,
33                        const std::map<std::string, std::string>& images_path);
34     android::base::Result<void> Build();
35     android::base::Result<std::string> ReadVBMetaImageFromFile(const std::string& file);
36     // It adds the vbmeta image in super_vbmeta and returns the index
37     // (which has the same meaning with vbmeta_index of VBMetaDescriptor).
38     android::base::Result<uint8_t> AddVBMetaImage(const std::string& vbmeta_name);
39     void DeleteVBMetaImage(const std::string& vbmeta_name);
40     std::unique_ptr<VBMetaTable> ExportVBMetaTable();
41     android::base::Result<void> ExportVBMetaTableToFile();
42     android::base::Result<void> ExportVBMetaImageToFile(const uint8_t vbmeta_index,
43                                                         const std::string& vbmeta_image);
44 
45   private:
46     android::base::Result<uint8_t> GetEmptySlot();
47 
48     int super_vbmeta_fd_;
49     VBMetaTable table_;
50     // Maps vbmeta image name to vbmeta image file path.
51     std::map<std::string, std::string> images_path_;
52 };
53 
54 }  // namespace fs_mgr
55 }  // namespace android