1 /*
2 * Copyright (C) 2018 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 #ifndef IDMAP2_IDMAP2D_IDMAP2SERVICE_H_
18 #define IDMAP2_IDMAP2D_IDMAP2SERVICE_H_
19
20 #include <android-base/unique_fd.h>
21 #include <android/os/BnIdmap2.h>
22 #include <android/os/FabricatedOverlayInfo.h>
23 #include <binder/BinderService.h>
24 #include <idmap2/ResourceContainer.h>
25 #include <idmap2/Result.h>
26
27 #include <filesystem>
28 #include <memory>
29 #include <string>
30 #include <vector>
31
32 namespace android::os {
33
34 class Idmap2Service : public BinderService<Idmap2Service>, public BnIdmap2 {
35 public:
getServiceName()36 static char const* getServiceName() {
37 return "idmap";
38 }
39
40 binder::Status getIdmapPath(const std::string& overlay_path, int32_t user_id,
41 std::string* _aidl_return) override;
42
43 binder::Status removeIdmap(const std::string& overlay_path, int32_t user_id,
44 bool* _aidl_return) override;
45
46 binder::Status verifyIdmap(const std::string& target_path, const std::string& overlay_path,
47 const std::string& overlay_name, int32_t fulfilled_policies,
48 bool enforce_overlayable, int32_t user_id,
49 bool* _aidl_return) override;
50
51 binder::Status createIdmap(const std::string& target_path, const std::string& overlay_path,
52 const std::string& overlay_name, int32_t fulfilled_policies,
53 bool enforce_overlayable, int32_t user_id,
54 std::optional<std::string>* _aidl_return) override;
55
56 binder::Status createFabricatedOverlay(
57 const os::FabricatedOverlayInternal& overlay,
58 std::optional<os::FabricatedOverlayInfo>* _aidl_return) override;
59
60 binder::Status deleteFabricatedOverlay(const std::string& overlay_path,
61 bool* _aidl_return) override;
62
63 binder::Status acquireFabricatedOverlayIterator() override;
64
65 binder::Status releaseFabricatedOverlayIterator() override;
66
67 binder::Status nextFabricatedOverlayInfos(
68 std::vector<os::FabricatedOverlayInfo>* _aidl_return) override;
69
70 binder::Status dumpIdmap(const std::string& overlay_path, std::string* _aidl_return) override;
71
72 private:
73 // idmap2d is killed after a period of inactivity, so any information stored on this class should
74 // be able to be recalculated if idmap2 dies and restarts.
75 std::unique_ptr<idmap2::TargetResourceContainer> framework_apk_cache_;
76
77 std::optional<std::filesystem::directory_iterator> frro_iter_;
78
79 template <typename T>
80 using MaybeUniquePtr = std::variant<std::unique_ptr<T>, T*>;
81
82 using TargetResourceContainerPtr = MaybeUniquePtr<idmap2::TargetResourceContainer>;
83 idmap2::Result<TargetResourceContainerPtr> GetTargetContainer(const std::string& target_path);
84
85 template <typename T>
86 WARN_UNUSED static const T* GetPointer(const MaybeUniquePtr<T>& ptr);
87 };
88
89 template <typename T>
GetPointer(const MaybeUniquePtr<T> & ptr)90 const T* Idmap2Service::GetPointer(const MaybeUniquePtr<T>& ptr) {
91 auto u = std::get_if<T*>(&ptr);
92 if (u != nullptr) {
93 return *u;
94 }
95 return std::get<std::unique_ptr<T>>(ptr).get();
96 }
97
98 } // namespace android::os
99
100 #endif // IDMAP2_IDMAP2D_IDMAP2SERVICE_H_
101