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Commit 7843bbb2 authored by Wenhao Wang's avatar Wenhao Wang
Browse files

Init BackgroundInstallControlService 

The BackgroundInstallControlService monitors background installed apps.
It can provide the list of those apps to the service clients via binder.
See the following desgin doc and PRD for more details.
go/bg-install-control
go/BIC-prd

Bug: 244216300
Test: manual test (verify the binder service is published)
Change-Id: Ic45770061c1291ef3e650337514fca99e0c683b8
parent 2d78b627

core/java/android/content/Context.java

+9 −0
Original line number Diff line number Diff line
@@ -5193,6 +5193,15 @@ public abstract class Context { 
     */

    public static final String DROPBOX_SERVICE = "dropbox";



    /**

     * System service name for BackgroundInstallControlService. This service supervises the MBAs

     * on device and provides the related metadata of the MBAs.

     *

     * @hide

     */

    @SuppressLint("ServiceName")

    public static final String BACKGROUND_INSTALL_CONTROL_SERVICE = "background_install_control";



    /**

     * System service name for BinaryTransparencyService. This is used to retrieve measurements

     * pertaining to various pre-installed and system binaries on device for the purposes of

core/java/android/content/pm/IBackgroundInstallControlService.aidl

0 → 100644
+26 −0
Original line number Diff line number Diff line 
/*

 * Copyright (C) 2022 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.

 */



package android.content.pm;



import android.content.pm.ParceledListSlice;



/**

 * {@hide}

 */

interface IBackgroundInstallControlService {

    ParceledListSlice getBackgroundInstalledPackages(long flags, int userId);

}

services/core/java/com/android/server/pm/BackgroundInstallControlService.java

0 → 100644
+130 −0
Original line number Diff line number Diff line 
/*

 * Copyright (C) 2022 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.

 */



package com.android.server.pm;



import android.annotation.NonNull;

import android.content.Context;

import android.content.pm.IBackgroundInstallControlService;

import android.content.pm.IPackageManager;

import android.content.pm.PackageInfo;

import android.content.pm.PackageManager;

import android.content.pm.ParceledListSlice;

import android.os.IBinder;

import android.os.RemoteException;

import android.os.ServiceManager;

import android.util.SparseArrayMap;



import com.android.internal.annotations.VisibleForTesting;

import com.android.server.SystemService;



/**

 * @hide

 */

public class BackgroundInstallControlService extends SystemService {

    private static final String TAG = "BackgroundInstallControlService";



    private final Context mContext;

    private final BinderService mBinderService;

    private final IPackageManager mIPackageManager;



    // User ID -> package name -> time diff

    // The time diff between the last foreground activity installer and

    // the "onPackageAdded" function call.

    private final SparseArrayMap<String, Long> mBackgroundInstalledPackages =

            new SparseArrayMap<>();



    public BackgroundInstallControlService(@NonNull Context context) {

        this(new InjectorImpl(context));

    }



    @VisibleForTesting

    BackgroundInstallControlService(@NonNull Injector injector) {

        super(injector.getContext());

        mContext = injector.getContext();

        mIPackageManager = injector.getIPackageManager();

        mBinderService = new BinderService(this);

    }



    private static final class BinderService extends IBackgroundInstallControlService.Stub {

        final BackgroundInstallControlService mService;



        BinderService(BackgroundInstallControlService service)  {

            mService = service;

        }



        @Override

        public ParceledListSlice<PackageInfo> getBackgroundInstalledPackages(

                @PackageManager.PackageInfoFlagsBits long flags, int userId) {

            ParceledListSlice<PackageInfo> packages;

            try {

                packages = mService.mIPackageManager.getInstalledPackages(flags, userId);

            } catch (RemoteException e) {

                throw new IllegalStateException("Package manager not available", e);

            }



            // TODO(b/244216300): to enable the test the usage by BinaryTransparencyService,

            // we currently comment out the actual implementation.

            // The fake implementation is just to filter out the first app of the list.

            // for (int i = 0, size = packages.getList().size(); i < size; i++) {

            //     String packageName = packages.getList().get(i).packageName;

            //     if (!mBackgroundInstalledPackages.contains(userId, packageName) {

            //         packages.getList().remove(i);

            //     }

            // }

            if (packages.getList().size() > 0) {

                packages.getList().remove(0);

            }

            return packages;

        }

    }



    /**

     * Called when the system service should publish a binder service using

     * {@link #publishBinderService(String, IBinder).}

     */

    @Override

    public void onStart() {

        publishBinderService(Context.BACKGROUND_INSTALL_CONTROL_SERVICE, mBinderService);

    }



    /**

     * Dependency injector for {@link #BackgroundInstallControlService)}.

     */

    interface Injector {

        Context getContext();



        IPackageManager getIPackageManager();

    }



    private static final class InjectorImpl implements Injector {

        private final Context mContext;



        InjectorImpl(Context context) {

            mContext = context;

        }



        @Override

        public Context getContext() {

            return mContext;

        }



        @Override

        public IPackageManager getIPackageManager() {

            return IPackageManager.Stub.asInterface(ServiceManager.getService("package"));

        }

    }

}

services/java/com/android/server/SystemServer.java

+5 −0
Original line number Diff line number Diff line
@@ -154,6 +154,7 @@ import com.android.server.os.SchedulingPolicyService; 
import com.android.server.people.PeopleService;

import com.android.server.pm.ApexManager;

import com.android.server.pm.ApexSystemServiceInfo;

import com.android.server.pm.BackgroundInstallControlService;

import com.android.server.pm.CrossProfileAppsService;

import com.android.server.pm.DataLoaderManagerService;

import com.android.server.pm.DynamicCodeLoggingService;
@@ -2469,6 +2470,10 @@ public final class SystemServer implements Dumpable { 
            t.traceBegin("StartMediaMetricsManager");

            mSystemServiceManager.startService(MediaMetricsManagerService.class);

            t.traceEnd();



            t.traceBegin("StartBackgroundInstallControlService");

            mSystemServiceManager.startService(BackgroundInstallControlService.class);

            t.traceEnd();

        }



        t.traceBegin("StartMediaProjectionManager");