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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 <functional>
#include <memory>
#include <string>
#include <vector>
#include "dataloader_ndk.h"
#include "incfs.h"
namespace android::dataloader {
using DataLoaderStatus = ::DataLoaderStatus;
template <class T>
using Span = android::incfs::Span<T>;
struct DataLoader;
struct DataLoaderParams;
struct DataLoaderInstallationFile;
struct FilesystemConnector;
struct StatusListener;
using FileId = IncFsFileId;
using Uid = IncFsUid;
using ReadInfo = IncFsReadInfo;
using ReadInfoWithUid = IncFsReadInfoWithUid;
using DataBlock = IncFsDataBlock;
using FilesystemConnectorPtr = FilesystemConnector*;
using StatusListenerPtr = StatusListener*;
using ServiceConnectorPtr = DataLoaderServiceConnectorPtr;
using ServiceParamsPtr = DataLoaderServiceParamsPtr;
using DataLoaderPtr = std::unique_ptr<DataLoader>;
using DataLoaderInstallationFiles = Span<const ::DataLoaderInstallationFile>;
using PendingReads = Span<const ReadInfo>;
using PendingReadsWithUid = Span<const ReadInfoWithUid>;
using PageReads = Span<const ReadInfo>;
using PageReadsWithUid = Span<const ReadInfoWithUid>;
using RawMetadata = std::vector<char>;
using DataBlocks = Span<const DataBlock>;
constexpr int kBlockSize = INCFS_DATA_FILE_BLOCK_SIZE;
struct DataLoader {
using Factory = std::function<DataLoaderPtr(DataLoaderServiceVmPtr, const DataLoaderParams&)>;
static void initialize(Factory&& factory);
virtual ~DataLoader() {}
// Bitmask of supported features.
virtual DataLoaderFeatures getFeatures() const = 0;
// Lifecycle.
virtual bool onCreate(const DataLoaderParams&, FilesystemConnectorPtr, StatusListenerPtr,
ServiceConnectorPtr, ServiceParamsPtr) = 0;
virtual bool onStart() = 0;
virtual void onStop() = 0;
virtual void onDestroy() = 0;
// FS callbacks.
virtual bool onPrepareImage(DataLoaderInstallationFiles addedFiles) = 0;
// IFS callbacks.
virtual void onPendingReads(PendingReads pendingReads) = 0;
virtual void onPageReads(PageReads pageReads) = 0;
virtual void onPendingReadsWithUid(PageReadsWithUid pendingReads) = 0;
virtual void onPageReadsWithUid(PendingReadsWithUid pageReads) = 0;
};
struct DataLoaderParams {
DataLoaderType type() const { return mType; }
const std::string& packageName() const { return mPackageName; }
const std::string& className() const { return mClassName; }
const std::string& arguments() const { return mArguments; }
DataLoaderParams(DataLoaderType type, std::string&& packageName, std::string&& className,
std::string&& arguments);
private:
DataLoaderType const mType;
std::string const mPackageName;
std::string const mClassName;
std::string const mArguments;
};
struct DataLoaderInstallationFile {
DataLoaderLocation location() const { return mLocation; }
const std::string& name() const { return mName; }
IncFsSize size() const { return mSize; }
const RawMetadata& metadata() const { return mMetadata; }
DataLoaderInstallationFile(DataLoaderLocation location, std::string&& name, IncFsSize size,
RawMetadata&& metadata);
private:
DataLoaderLocation const mLocation;
std::string const mName;
IncFsSize const mSize;
RawMetadata const mMetadata;
};
struct FilesystemConnector : public DataLoaderFilesystemConnector {
android::incfs::UniqueFd openForSpecialOps(FileId fid);
int writeBlocks(DataBlocks blocks);
RawMetadata getRawMetadata(FileId fid);
bool setParams(DataLoaderFilesystemParams);
};
struct StatusListener : public DataLoaderStatusListener {
bool reportStatus(DataLoaderStatus status);
};
} // namespace android::dataloader
#include "dataloader_inline.h"
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