From 7843bbb2f04dfc77f80ebfbae9c455204380f01b Mon Sep 17 00:00:00 2001 From: Wenhao Wang Date: Mon, 17 Oct 2022 09:57:34 -0700 Subject: [PATCH] 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 --- core/java/android/content/Context.java | 9 ++ .../pm/IBackgroundInstallControlService.aidl | 26 ++++ .../pm/BackgroundInstallControlService.java | 130 ++++++++++++++++++ .../java/com/android/server/SystemServer.java | 5 + 4 files changed, 170 insertions(+) create mode 100644 core/java/android/content/pm/IBackgroundInstallControlService.aidl create mode 100644 services/core/java/com/android/server/pm/BackgroundInstallControlService.java diff --git a/core/java/android/content/Context.java b/core/java/android/content/Context.java index d65210b8a0bc9..a0332a15c8dd5 100644 --- a/core/java/android/content/Context.java +++ b/core/java/android/content/Context.java @@ -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 diff --git a/core/java/android/content/pm/IBackgroundInstallControlService.aidl b/core/java/android/content/pm/IBackgroundInstallControlService.aidl new file mode 100644 index 0000000000000..c8e7caebc8212 --- /dev/null +++ b/core/java/android/content/pm/IBackgroundInstallControlService.aidl @@ -0,0 +1,26 @@ +/* + * 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); +} diff --git a/services/core/java/com/android/server/pm/BackgroundInstallControlService.java b/services/core/java/com/android/server/pm/BackgroundInstallControlService.java new file mode 100644 index 0000000000000..df95f86d1e079 --- /dev/null +++ b/services/core/java/com/android/server/pm/BackgroundInstallControlService.java @@ -0,0 +1,130 @@ +/* + * 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 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 getBackgroundInstalledPackages( + @PackageManager.PackageInfoFlagsBits long flags, int userId) { + ParceledListSlice 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")); + } + } +} diff --git a/services/java/com/android/server/SystemServer.java b/services/java/com/android/server/SystemServer.java index b74fedf3ff462..593e64828ffcf 100644 --- a/services/java/com/android/server/SystemServer.java +++ b/services/java/com/android/server/SystemServer.java @@ -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");