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 UPDATE_ENGINE_UPDATE_MANAGER_ROLLBACK_PREFS_H_
18 #define UPDATE_ENGINE_UPDATE_MANAGER_ROLLBACK_PREFS_H_
19 
20 namespace chromeos_update_manager {
21 
22 // Value used to represent that kernel key versions can always roll-forward.
23 // This is the maximum value of a kernel key version.
24 constexpr int kRollforwardInfinity = 0xfffffffe;
25 
26 // Whether the device should roll back to the target version, and if yes, which
27 // type of rollback should it do. Matches chrome_device_policy.proto's
28 // AutoUpdateSettingsProto::RollbackToTargetVersion.
29 enum class RollbackToTargetVersion {
30   kUnspecified = 0,
31   kDisabled = 1,
32   kRollbackAndPowerwash = 2,
33   kRollbackAndRestoreIfPossible = 3,
34   // This value must be the last entry.
35   kMaxValue = 4
36 };
37 
38 }  // namespace chromeos_update_manager
39 
40 #endif  // UPDATE_ENGINE_UPDATE_MANAGER_ROLLBACK_PREFS_H_
41