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//
// Copyright (C) 2019 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.
//
#if !defined(__ANDROID_RECOVERY__)
#include <android-base/logging.h>
#include <android-base/properties.h>
#include <android/gsi/IGsiService.h>
#include <android/gsi/IGsid.h>
#include <binder/IServiceManager.h>
#include <libfiemap/image_manager.h>
#include <libgsi/libgsi.h>
namespace android {
namespace fiemap {
using namespace android::gsi;
using namespace std::chrono_literals;
class ImageManagerBinder final : public IImageManager {
public:
ImageManagerBinder(android::sp<IGsiService>&& service, android::sp<IImageService>&& manager);
bool CreateBackingImage(const std::string& name, uint64_t size, int flags) override;
bool DeleteBackingImage(const std::string& name) override;
bool MapImageDevice(const std::string& name, const std::chrono::milliseconds& timeout_ms,
std::string* path) override;
bool UnmapImageDevice(const std::string& name) override;
bool BackingImageExists(const std::string& name) override;
private:
android::sp<IGsiService> service_;
android::sp<IImageService> manager_;
};
ImageManagerBinder::ImageManagerBinder(android::sp<IGsiService>&& service,
android::sp<IImageService>&& manager)
: service_(std::move(service)), manager_(std::move(manager)) {}
bool ImageManagerBinder::CreateBackingImage(const std::string& name, uint64_t size, int flags) {
auto status = manager_->createBackingImage(name, size, flags);
if (!status.isOk()) {
LOG(ERROR) << __PRETTY_FUNCTION__
<< " binder returned: " << status.exceptionMessage().string();
return false;
}
return true;
}
bool ImageManagerBinder::DeleteBackingImage(const std::string& name) {
auto status = manager_->deleteBackingImage(name);
if (!status.isOk()) {
LOG(ERROR) << __PRETTY_FUNCTION__
<< " binder returned: " << status.exceptionMessage().string();
return false;
}
return true;
}
bool ImageManagerBinder::MapImageDevice(const std::string& name,
const std::chrono::milliseconds& timeout_ms,
std::string* path) {
MappedImage map;
auto status = manager_->mapImageDevice(name, timeout_ms.count(), &map);
if (!status.isOk()) {
LOG(ERROR) << __PRETTY_FUNCTION__
<< " binder returned: " << status.exceptionMessage().string();
return false;
}
*path = map.path;
return true;
}
bool ImageManagerBinder::UnmapImageDevice(const std::string& name) {
auto status = manager_->unmapImageDevice(name);
if (!status.isOk()) {
LOG(ERROR) << __PRETTY_FUNCTION__
<< " binder returned: " << status.exceptionMessage().string();
return false;
}
return true;
}
bool ImageManagerBinder::BackingImageExists(const std::string& name) {
bool retval;
auto status = manager_->backingImageExists(name, &retval);
if (!status.isOk()) {
LOG(ERROR) << __PRETTY_FUNCTION__
<< " binder returned: " << status.exceptionMessage().string();
return false;
}
return retval;
}
static android::sp<IGsid> AcquireIGsid(const std::chrono::milliseconds& timeout_ms) {
if (android::base::GetProperty("init.svc.gsid", "") != "running") {
if (!android::base::SetProperty("ctl.start", "gsid") ||
!android::base::WaitForProperty("init.svc.gsid", "running", timeout_ms)) {
LOG(ERROR) << "Could not start the gsid service";
return nullptr;
}
// Sleep for 250ms to give the service time to register.
usleep(250 * 1000);
}
auto sm = android::defaultServiceManager();
auto name = android::String16(kGsiServiceName);
auto service = sm->checkService(name);
return android::interface_cast<IGsid>(service);
}
static android::sp<IGsid> GetGsiService(const std::chrono::milliseconds& timeout_ms) {
auto start_time = std::chrono::steady_clock::now();
std::chrono::milliseconds elapsed = std::chrono::milliseconds::zero();
do {
if (auto gsid = AcquireIGsid(timeout_ms - elapsed); gsid != nullptr) {
return gsid;
}
auto now = std::chrono::steady_clock::now();
elapsed = std::chrono::duration_cast<std::chrono::milliseconds>(now - start_time);
} while (elapsed <= timeout_ms);
LOG(ERROR) << "Timed out trying to acquire IGsid interface";
return nullptr;
}
std::unique_ptr<IImageManager> IImageManager::Open(const std::string& dir,
const std::chrono::milliseconds& timeout_ms) {
auto gsid = GetGsiService(timeout_ms);
if (!gsid) {
return nullptr;
}
android::sp<IGsiService> service;
auto status = gsid->getClient(&service);
if (!status.isOk() || !service) {
LOG(ERROR) << "Could not acquire IGsiService";
return nullptr;
}
android::sp<IImageService> manager;
status = service->openImageService(dir, &manager);
if (!status.isOk() || !manager) {
LOG(ERROR) << "Could not acquire IImageManager: " << status.exceptionMessage().string();
return nullptr;
}
return std::make_unique<ImageManagerBinder>(std::move(service), std::move(manager));
}
} // namespace fiemap
} // namespace android
#endif // __ANDROID_RECOVERY__
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