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114 lines
3.4 KiB
114 lines
3.4 KiB
/*
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* Copyright (C) 2018 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#define LOG_TAG "apexd"
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#include "apexd_checkpoint_vold.h"
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#include <android-base/logging.h>
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#include <android/os/IVold.h>
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#include <binder/IServiceManager.h>
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using android::sp;
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using android::base::Error;
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using android::base::Result;
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using android::os::IVold;
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namespace android {
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namespace apex {
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Result<VoldCheckpointInterface> VoldCheckpointInterface::Create() {
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auto vold_service =
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defaultServiceManager()->getService(android::String16("vold"));
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if (vold_service != nullptr) {
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return VoldCheckpointInterface(
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android::interface_cast<android::os::IVold>(vold_service));
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}
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return Errorf("Failed to retrieve vold service.");
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}
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VoldCheckpointInterface::VoldCheckpointInterface(sp<IVold>&& vold_service) {
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vold_service_ = vold_service;
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supports_fs_checkpoints_ = false;
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android::binder::Status status =
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vold_service_->supportsCheckpoint(&supports_fs_checkpoints_);
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if (!status.isOk()) {
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LOG(ERROR) << "Failed to check if filesystem checkpoints are supported: "
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<< status.toString8().c_str();
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}
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}
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VoldCheckpointInterface::VoldCheckpointInterface(
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VoldCheckpointInterface&& other) noexcept {
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vold_service_ = std::move(other.vold_service_);
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supports_fs_checkpoints_ = other.supports_fs_checkpoints_;
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}
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VoldCheckpointInterface::~VoldCheckpointInterface() {
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// Just here to be able to forward-declare IVold.
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}
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Result<bool> VoldCheckpointInterface::SupportsFsCheckpoints() {
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return supports_fs_checkpoints_;
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}
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Result<bool> VoldCheckpointInterface::NeedsCheckpoint() {
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if (supports_fs_checkpoints_) {
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bool needs_checkpoint = false;
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android::binder::Status status =
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vold_service_->needsCheckpoint(&needs_checkpoint);
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if (!status.isOk()) {
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return Error() << status.toString8().c_str();
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}
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return needs_checkpoint;
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}
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return false;
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}
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Result<bool> VoldCheckpointInterface::NeedsRollback() {
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if (supports_fs_checkpoints_) {
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bool needs_rollback = false;
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android::binder::Status status =
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vold_service_->needsRollback(&needs_rollback);
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if (!status.isOk()) {
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return Error() << status.toString8().c_str();
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}
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return needs_rollback;
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}
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return false;
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}
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Result<void> VoldCheckpointInterface::StartCheckpoint(int32_t num_retries) {
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if (supports_fs_checkpoints_) {
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android::binder::Status status =
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vold_service_->startCheckpoint(num_retries);
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if (!status.isOk()) {
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return Error() << status.toString8().c_str();
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}
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return {};
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}
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return Errorf("Device does not support filesystem checkpointing");
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}
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Result<void> VoldCheckpointInterface::AbortChanges(const std::string& msg,
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bool retry) {
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vold_service_->abortChanges(msg, retry);
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return {};
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}
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} // namespace apex
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} // namespace android
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