| /* |
| * Copyright (C) 2017 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.backup.internal; |
| |
| import static com.android.server.backup.BackupManagerService.TAG; |
| |
| import android.annotation.Nullable; |
| import android.app.AlarmManager; |
| import android.app.backup.BackupTransport; |
| import android.app.backup.IBackupObserver; |
| import android.os.RemoteException; |
| import android.os.SystemClock; |
| import android.util.EventLog; |
| import android.util.Slog; |
| |
| import com.android.internal.annotations.VisibleForTesting; |
| import com.android.internal.backup.IBackupTransport; |
| import com.android.server.EventLogTags; |
| import com.android.server.backup.BackupManagerService; |
| import com.android.server.backup.TransportManager; |
| import com.android.server.backup.transport.TransportClient; |
| |
| import java.io.File; |
| import java.util.ArrayList; |
| import java.util.List; |
| |
| /** |
| * Attempts to call {@link BackupTransport#initializeDevice()} followed by |
| * {@link BackupTransport#finishBackup()} for the transport names passed in with the intent of |
| * wiping backup data from the transport. |
| * |
| * If the transport returns error, it will record the operation as pending and schedule it to run in |
| * a future time according to {@link BackupTransport#requestBackupTime()}. The result status |
| * reported to observers will be the last unsuccessful status reported by the transports. If every |
| * operation was successful then it's {@link BackupTransport#TRANSPORT_OK}. |
| */ |
| public class PerformInitializeTask implements Runnable { |
| private final BackupManagerService mBackupManagerService; |
| private final TransportManager mTransportManager; |
| private final String[] mQueue; |
| private final File mBaseStateDir; |
| private final OnTaskFinishedListener mListener; |
| @Nullable private IBackupObserver mObserver; |
| |
| public PerformInitializeTask( |
| BackupManagerService backupManagerService, |
| String[] transportNames, |
| @Nullable IBackupObserver observer, |
| OnTaskFinishedListener listener) { |
| this( |
| backupManagerService, |
| backupManagerService.getTransportManager(), |
| transportNames, |
| observer, |
| listener, |
| backupManagerService.getBaseStateDir()); |
| } |
| |
| @VisibleForTesting |
| PerformInitializeTask( |
| BackupManagerService backupManagerService, |
| TransportManager transportManager, |
| String[] transportNames, |
| @Nullable IBackupObserver observer, |
| OnTaskFinishedListener listener, |
| File baseStateDir) { |
| mBackupManagerService = backupManagerService; |
| mTransportManager = transportManager; |
| mQueue = transportNames; |
| mObserver = observer; |
| mListener = listener; |
| mBaseStateDir = baseStateDir; |
| } |
| |
| private void notifyResult(String target, int status) { |
| try { |
| if (mObserver != null) { |
| mObserver.onResult(target, status); |
| } |
| } catch (RemoteException ignored) { |
| mObserver = null; // don't try again |
| } |
| } |
| |
| private void notifyFinished(int status) { |
| try { |
| if (mObserver != null) { |
| mObserver.backupFinished(status); |
| } |
| } catch (RemoteException ignored) { |
| mObserver = null; |
| } |
| } |
| |
| public void run() { |
| // mWakelock is *acquired* when execution begins here |
| String callerLogString = "PerformInitializeTask.run()"; |
| List<TransportClient> transportClientsToDisposeOf = new ArrayList<>(mQueue.length); |
| int result = BackupTransport.TRANSPORT_OK; |
| try { |
| for (String transportName : mQueue) { |
| TransportClient transportClient = |
| mTransportManager.getTransportClient(transportName, callerLogString); |
| if (transportClient == null) { |
| Slog.e(TAG, "Requested init for " + transportName + " but not found"); |
| continue; |
| } |
| transportClientsToDisposeOf.add(transportClient); |
| |
| Slog.i(TAG, "Initializing (wiping) backup transport storage: " + transportName); |
| String transportDirName = |
| mTransportManager.getTransportDirName( |
| transportClient.getTransportComponent()); |
| EventLog.writeEvent(EventLogTags.BACKUP_START, transportDirName); |
| long startRealtime = SystemClock.elapsedRealtime(); |
| |
| IBackupTransport transport = transportClient.connectOrThrow(callerLogString); |
| int status = transport.initializeDevice(); |
| |
| if (status == BackupTransport.TRANSPORT_OK) { |
| status = transport.finishBackup(); |
| } |
| |
| // Okay, the wipe really happened. Clean up our local bookkeeping. |
| if (status == BackupTransport.TRANSPORT_OK) { |
| Slog.i(TAG, "Device init successful"); |
| int millis = (int) (SystemClock.elapsedRealtime() - startRealtime); |
| EventLog.writeEvent(EventLogTags.BACKUP_INITIALIZE); |
| File stateFileDir = new File(mBaseStateDir, transportDirName); |
| mBackupManagerService.resetBackupState(stateFileDir); |
| EventLog.writeEvent(EventLogTags.BACKUP_SUCCESS, 0, millis); |
| mBackupManagerService.recordInitPending(false, transportName, transportDirName); |
| notifyResult(transportName, BackupTransport.TRANSPORT_OK); |
| } else { |
| // If this didn't work, requeue this one and try again |
| // after a suitable interval |
| Slog.e(TAG, "Transport error in initializeDevice()"); |
| EventLog.writeEvent(EventLogTags.BACKUP_TRANSPORT_FAILURE, "(initialize)"); |
| mBackupManagerService.recordInitPending(true, transportName, transportDirName); |
| notifyResult(transportName, status); |
| result = status; |
| |
| // do this via another alarm to make sure of the wakelock states |
| long delay = transport.requestBackupTime(); |
| Slog.w(TAG, "Init failed on " + transportName + " resched in " + delay); |
| mBackupManagerService.getAlarmManager().set( |
| AlarmManager.RTC_WAKEUP, |
| System.currentTimeMillis() + delay, |
| mBackupManagerService.getRunInitIntent()); |
| } |
| } |
| } catch (Exception e) { |
| Slog.e(TAG, "Unexpected error performing init", e); |
| result = BackupTransport.TRANSPORT_ERROR; |
| } finally { |
| for (TransportClient transportClient : transportClientsToDisposeOf) { |
| mTransportManager.disposeOfTransportClient(transportClient, callerLogString); |
| } |
| notifyFinished(result); |
| mListener.onFinished(callerLogString); |
| } |
| } |
| } |