1 // 2 // Copyright (C) 2020 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_MINIMUM_VERSION_POLICY_IMPL_H_ 18 #define UPDATE_ENGINE_UPDATE_MANAGER_MINIMUM_VERSION_POLICY_IMPL_H_ 19 20 #include <string> 21 22 #include "update_engine/common/error_code.h" 23 #include "update_engine/payload_consumer/install_plan.h" 24 #include "update_engine/update_manager/policy_utils.h" 25 26 namespace chromeos_update_manager { 27 28 // Check to see if an update happens from a version less than the minimum 29 // required one. 30 class MinimumVersionPolicyImpl : public PolicyImplBase { 31 public: 32 MinimumVersionPolicyImpl() = default; 33 ~MinimumVersionPolicyImpl() override = default; 34 35 // If current version is less than the minimum required one, then this should 36 // not block the update to be applied. 37 EvalStatus UpdateCanBeApplied( 38 EvaluationContext* ec, 39 State* state, 40 std::string* error, 41 chromeos_update_engine::ErrorCode* result, 42 chromeos_update_engine::InstallPlan* install_plan) const override; 43 44 protected: PolicyName()45 std::string PolicyName() const override { return "MinimumVersionPolicyImpl"; } 46 47 private: 48 MinimumVersionPolicyImpl(const MinimumVersionPolicyImpl&) = delete; 49 MinimumVersionPolicyImpl& operator=(const MinimumVersionPolicyImpl&) = delete; 50 }; 51 52 } // namespace chromeos_update_manager 53 54 #endif // UPDATE_ENGINE_UPDATE_MANAGER_MINIMUM_VERSION_POLICY_IMPL_H_ 55