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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.
*/
#pragma once
#include <android-base/unique_fd.h>
#include <android/content/pm/DataLoaderParamsParcel.h>
#include <android/content/pm/FileSystemControlParcel.h>
#include <android/content/pm/IDataLoader.h>
#include <android/content/pm/IDataLoaderStatusListener.h>
#include <binder/IAppOpsCallback.h>
#include <binder/IServiceManager.h>
#include <binder/Status.h>
#include <incfs.h>
#include <jni.h>
#include <utils/Looper.h>
#include <memory>
#include <span>
#include <string>
#include <string_view>
namespace android::incremental {
using Clock = std::chrono::steady_clock;
using TimePoint = std::chrono::time_point<Clock>;
using Milliseconds = std::chrono::milliseconds;
using Job = std::function<void()>;
// --- Wrapper interfaces ---
using MountId = int32_t;
class VoldServiceWrapper {
public:
virtual ~VoldServiceWrapper() = default;
virtual binder::Status mountIncFs(
const std::string& backingPath, const std::string& targetDir, int32_t flags,
os::incremental::IncrementalFileSystemControlParcel* result) const = 0;
virtual binder::Status unmountIncFs(const std::string& dir) const = 0;
virtual binder::Status bindMount(const std::string& sourceDir,
const std::string& targetDir) const = 0;
virtual binder::Status setIncFsMountOptions(
const os::incremental::IncrementalFileSystemControlParcel& control,
bool enableReadLogs) const = 0;
};
class DataLoaderManagerWrapper {
public:
virtual ~DataLoaderManagerWrapper() = default;
virtual binder::Status bindToDataLoader(
MountId mountId, const content::pm::DataLoaderParamsParcel& params,
const sp<content::pm::IDataLoaderStatusListener>& listener, bool* result) const = 0;
virtual binder::Status getDataLoader(MountId mountId,
sp<content::pm::IDataLoader>* result) const = 0;
virtual binder::Status unbindFromDataLoader(MountId mountId) const = 0;
};
class IncFsWrapper {
public:
using Control = incfs::Control;
using FileId = incfs::FileId;
using ErrorCode = incfs::ErrorCode;
using WaitResult = incfs::WaitResult;
using ExistingMountCallback =
std::function<void(std::string_view root, std::string_view backingDir,
std::span<std::pair<std::string_view, std::string_view>> binds)>;
virtual ~IncFsWrapper() = default;
virtual void listExistingMounts(const ExistingMountCallback& cb) const = 0;
virtual Control openMount(std::string_view path) const = 0;
virtual Control createControl(IncFsFd cmd, IncFsFd pendingReads, IncFsFd logs) const = 0;
virtual ErrorCode makeFile(const Control& control, std::string_view path, int mode, FileId id,
incfs::NewFileParams params) const = 0;
virtual ErrorCode makeDir(const Control& control, std::string_view path, int mode) const = 0;
virtual ErrorCode makeDirs(const Control& control, std::string_view path, int mode) const = 0;
virtual incfs::RawMetadata getMetadata(const Control& control, FileId fileid) const = 0;
virtual incfs::RawMetadata getMetadata(const Control& control, std::string_view path) const = 0;
virtual FileId getFileId(const Control& control, std::string_view path) const = 0;
virtual ErrorCode link(const Control& control, std::string_view from,
std::string_view to) const = 0;
virtual ErrorCode unlink(const Control& control, std::string_view path) const = 0;
virtual base::unique_fd openForSpecialOps(const Control& control, FileId id) const = 0;
virtual ErrorCode writeBlocks(std::span<const incfs::DataBlock> blocks) const = 0;
virtual WaitResult waitForPendingReads(
const Control& control, std::chrono::milliseconds timeout,
std::vector<incfs::ReadInfo>* pendingReadsBuffer) const = 0;
};
class AppOpsManagerWrapper {
public:
virtual ~AppOpsManagerWrapper() = default;
virtual binder::Status checkPermission(const char* permission, const char* operation,
const char* package) const = 0;
virtual void startWatchingMode(int32_t op, const String16& packageName, const sp<IAppOpsCallback>& callback) = 0;
virtual void stopWatchingMode(const sp<IAppOpsCallback>& callback) = 0;
};
class JniWrapper {
public:
virtual ~JniWrapper() = default;
virtual void initializeForCurrentThread() const = 0;
};
class LooperWrapper {
public:
virtual ~LooperWrapper() = default;
virtual int addFd(int fd, int ident, int events, android::Looper_callbackFunc callback,
void* data) = 0;
virtual int removeFd(int fd) = 0;
virtual void wake() = 0;
virtual int pollAll(int timeoutMillis) = 0;
};
class TimedQueueWrapper {
public:
virtual ~TimedQueueWrapper() = default;
virtual void addJob(MountId id, Milliseconds after, Job what) = 0;
virtual void removeJobs(MountId id) = 0;
virtual void stop() = 0;
};
class ServiceManagerWrapper {
public:
virtual ~ServiceManagerWrapper() = default;
virtual std::unique_ptr<VoldServiceWrapper> getVoldService() = 0;
virtual std::unique_ptr<DataLoaderManagerWrapper> getDataLoaderManager() = 0;
virtual std::unique_ptr<IncFsWrapper> getIncFs() = 0;
virtual std::unique_ptr<AppOpsManagerWrapper> getAppOpsManager() = 0;
virtual std::unique_ptr<JniWrapper> getJni() = 0;
virtual std::unique_ptr<LooperWrapper> getLooper() = 0;
virtual std::unique_ptr<TimedQueueWrapper> getTimedQueue() = 0;
};
// --- Real stuff ---
class RealServiceManager : public ServiceManagerWrapper {
public:
RealServiceManager(sp<IServiceManager> serviceManager, JNIEnv* env);
~RealServiceManager() = default;
std::unique_ptr<VoldServiceWrapper> getVoldService() final;
std::unique_ptr<DataLoaderManagerWrapper> getDataLoaderManager() final;
std::unique_ptr<IncFsWrapper> getIncFs() final;
std::unique_ptr<AppOpsManagerWrapper> getAppOpsManager() final;
std::unique_ptr<JniWrapper> getJni() final;
std::unique_ptr<LooperWrapper> getLooper() final;
std::unique_ptr<TimedQueueWrapper> getTimedQueue() final;
private:
template <class INTERFACE>
sp<INTERFACE> getRealService(std::string_view serviceName) const;
sp<android::IServiceManager> mServiceManager;
JavaVM* const mJvm;
};
} // namespace android::incremental
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