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