BackupManagerService.java revision f7cbb1fc25223bbf793f7128280ee4b00d509eb0
1/* 2 * Copyright (C) 2009 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17package com.android.server.backup; 18 19import android.app.ActivityManagerNative; 20import android.app.AlarmManager; 21import android.app.AppGlobals; 22import android.app.IActivityManager; 23import android.app.IApplicationThread; 24import android.app.IBackupAgent; 25import android.app.PendingIntent; 26import android.app.backup.BackupAgent; 27import android.app.backup.BackupDataInput; 28import android.app.backup.BackupDataOutput; 29import android.app.backup.BackupTransport; 30import android.app.backup.FullBackup; 31import android.app.backup.RestoreDescription; 32import android.app.backup.RestoreSet; 33import android.app.backup.IBackupManager; 34import android.app.backup.IFullBackupRestoreObserver; 35import android.app.backup.IRestoreObserver; 36import android.app.backup.IRestoreSession; 37import android.content.ActivityNotFoundException; 38import android.content.BroadcastReceiver; 39import android.content.ComponentName; 40import android.content.ContentResolver; 41import android.content.Context; 42import android.content.Intent; 43import android.content.IntentFilter; 44import android.content.ServiceConnection; 45import android.content.pm.ApplicationInfo; 46import android.content.pm.IPackageDataObserver; 47import android.content.pm.IPackageDeleteObserver; 48import android.content.pm.IPackageInstallObserver; 49import android.content.pm.IPackageManager; 50import android.content.pm.PackageInfo; 51import android.content.pm.PackageManager; 52import android.content.pm.ResolveInfo; 53import android.content.pm.ServiceInfo; 54import android.content.pm.Signature; 55import android.content.pm.PackageManager.NameNotFoundException; 56import android.database.ContentObserver; 57import android.net.Uri; 58import android.os.Binder; 59import android.os.Build; 60import android.os.Bundle; 61import android.os.Environment; 62import android.os.Handler; 63import android.os.HandlerThread; 64import android.os.IBinder; 65import android.os.Looper; 66import android.os.Message; 67import android.os.ParcelFileDescriptor; 68import android.os.PowerManager; 69import android.os.Process; 70import android.os.RemoteException; 71import android.os.SELinux; 72import android.os.ServiceManager; 73import android.os.SystemClock; 74import android.os.UserHandle; 75import android.os.WorkSource; 76import android.os.Environment.UserEnvironment; 77import android.os.storage.IMountService; 78import android.provider.Settings; 79import android.system.ErrnoException; 80import android.system.Os; 81import android.util.EventLog; 82import android.util.Log; 83import android.util.Slog; 84import android.util.SparseArray; 85import android.util.StringBuilderPrinter; 86 87import com.android.internal.backup.IBackupTransport; 88import com.android.internal.backup.IObbBackupService; 89import com.android.server.AppWidgetBackupBridge; 90import com.android.server.EventLogTags; 91import com.android.server.SystemService; 92import com.android.server.backup.PackageManagerBackupAgent.Metadata; 93 94import java.io.BufferedInputStream; 95import java.io.BufferedOutputStream; 96import java.io.ByteArrayInputStream; 97import java.io.ByteArrayOutputStream; 98import java.io.DataInputStream; 99import java.io.DataOutputStream; 100import java.io.EOFException; 101import java.io.File; 102import java.io.FileDescriptor; 103import java.io.FileInputStream; 104import java.io.FileNotFoundException; 105import java.io.FileOutputStream; 106import java.io.IOException; 107import java.io.InputStream; 108import java.io.OutputStream; 109import java.io.PrintWriter; 110import java.io.RandomAccessFile; 111import java.security.InvalidAlgorithmParameterException; 112import java.security.InvalidKeyException; 113import java.security.Key; 114import java.security.MessageDigest; 115import java.security.NoSuchAlgorithmException; 116import java.security.SecureRandom; 117import java.security.spec.InvalidKeySpecException; 118import java.security.spec.KeySpec; 119import java.text.SimpleDateFormat; 120import java.util.ArrayList; 121import java.util.Arrays; 122import java.util.Date; 123import java.util.HashMap; 124import java.util.HashSet; 125import java.util.Iterator; 126import java.util.List; 127import java.util.Map; 128import java.util.Map.Entry; 129import java.util.Random; 130import java.util.Set; 131import java.util.TreeMap; 132import java.util.concurrent.atomic.AtomicBoolean; 133import java.util.concurrent.atomic.AtomicInteger; 134import java.util.zip.Deflater; 135import java.util.zip.DeflaterOutputStream; 136import java.util.zip.InflaterInputStream; 137 138import javax.crypto.BadPaddingException; 139import javax.crypto.Cipher; 140import javax.crypto.CipherInputStream; 141import javax.crypto.CipherOutputStream; 142import javax.crypto.IllegalBlockSizeException; 143import javax.crypto.NoSuchPaddingException; 144import javax.crypto.SecretKey; 145import javax.crypto.SecretKeyFactory; 146import javax.crypto.spec.IvParameterSpec; 147import javax.crypto.spec.PBEKeySpec; 148import javax.crypto.spec.SecretKeySpec; 149 150import libcore.io.IoUtils; 151 152public class BackupManagerService extends IBackupManager.Stub { 153 154 private static final String TAG = "BackupManagerService"; 155 private static final boolean DEBUG = true; 156 private static final boolean MORE_DEBUG = false; 157 158 // System-private key used for backing up an app's widget state. Must 159 // begin with U+FFxx by convention (we reserve all keys starting 160 // with U+FF00 or higher for system use). 161 static final String KEY_WIDGET_STATE = "\uffed\uffedwidget"; 162 163 // Historical and current algorithm names 164 static final String PBKDF_CURRENT = "PBKDF2WithHmacSHA1"; 165 static final String PBKDF_FALLBACK = "PBKDF2WithHmacSHA1And8bit"; 166 167 // Name and current contents version of the full-backup manifest file 168 // 169 // Manifest version history: 170 // 171 // 1 : initial release 172 static final String BACKUP_MANIFEST_FILENAME = "_manifest"; 173 static final int BACKUP_MANIFEST_VERSION = 1; 174 175 // External archive format version history: 176 // 177 // 1 : initial release 178 // 2 : no format change per se; version bump to facilitate PBKDF2 version skew detection 179 // 3 : introduced "_meta" metadata file; no other format change per se 180 static final int BACKUP_FILE_VERSION = 3; 181 static final String BACKUP_FILE_HEADER_MAGIC = "ANDROID BACKUP\n"; 182 static final int BACKUP_PW_FILE_VERSION = 2; 183 static final String BACKUP_METADATA_FILENAME = "_meta"; 184 static final int BACKUP_METADATA_VERSION = 1; 185 static final int BACKUP_WIDGET_METADATA_TOKEN = 0x01FFED01; 186 static final boolean COMPRESS_FULL_BACKUPS = true; // should be true in production 187 188 static final String SETTINGS_PACKAGE = "com.android.providers.settings"; 189 static final String SHARED_BACKUP_AGENT_PACKAGE = "com.android.sharedstoragebackup"; 190 static final String SERVICE_ACTION_TRANSPORT_HOST = "android.backup.TRANSPORT_HOST"; 191 192 // How often we perform a backup pass. Privileged external callers can 193 // trigger an immediate pass. 194 private static final long BACKUP_INTERVAL = AlarmManager.INTERVAL_HOUR; 195 196 // Random variation in backup scheduling time to avoid server load spikes 197 private static final int FUZZ_MILLIS = 5 * 60 * 1000; 198 199 // The amount of time between the initial provisioning of the device and 200 // the first backup pass. 201 private static final long FIRST_BACKUP_INTERVAL = 12 * AlarmManager.INTERVAL_HOUR; 202 203 // Retry interval for clear/init when the transport is unavailable 204 private static final long TRANSPORT_RETRY_INTERVAL = 1 * AlarmManager.INTERVAL_HOUR; 205 206 private static final String RUN_BACKUP_ACTION = "android.app.backup.intent.RUN"; 207 private static final String RUN_INITIALIZE_ACTION = "android.app.backup.intent.INIT"; 208 private static final String RUN_CLEAR_ACTION = "android.app.backup.intent.CLEAR"; 209 private static final int MSG_RUN_BACKUP = 1; 210 private static final int MSG_RUN_ADB_BACKUP = 2; 211 private static final int MSG_RUN_RESTORE = 3; 212 private static final int MSG_RUN_CLEAR = 4; 213 private static final int MSG_RUN_INITIALIZE = 5; 214 private static final int MSG_RUN_GET_RESTORE_SETS = 6; 215 private static final int MSG_TIMEOUT = 7; 216 private static final int MSG_RESTORE_TIMEOUT = 8; 217 private static final int MSG_FULL_CONFIRMATION_TIMEOUT = 9; 218 private static final int MSG_RUN_ADB_RESTORE = 10; 219 private static final int MSG_RETRY_INIT = 11; 220 private static final int MSG_RETRY_CLEAR = 12; 221 private static final int MSG_WIDGET_BROADCAST = 13; 222 private static final int MSG_RUN_FULL_TRANSPORT_BACKUP = 14; 223 224 // backup task state machine tick 225 static final int MSG_BACKUP_RESTORE_STEP = 20; 226 static final int MSG_OP_COMPLETE = 21; 227 228 // Timeout interval for deciding that a bind or clear-data has taken too long 229 static final long TIMEOUT_INTERVAL = 10 * 1000; 230 231 // Timeout intervals for agent backup & restore operations 232 static final long TIMEOUT_BACKUP_INTERVAL = 30 * 1000; 233 static final long TIMEOUT_FULL_BACKUP_INTERVAL = 5 * 60 * 1000; 234 static final long TIMEOUT_SHARED_BACKUP_INTERVAL = 30 * 60 * 1000; 235 static final long TIMEOUT_RESTORE_INTERVAL = 60 * 1000; 236 static final long TIMEOUT_RESTORE_FINISHED_INTERVAL = 30 * 1000; 237 238 // User confirmation timeout for a full backup/restore operation. It's this long in 239 // order to give them time to enter the backup password. 240 static final long TIMEOUT_FULL_CONFIRMATION = 60 * 1000; 241 242 private Context mContext; 243 private PackageManager mPackageManager; 244 IPackageManager mPackageManagerBinder; 245 private IActivityManager mActivityManager; 246 private PowerManager mPowerManager; 247 private AlarmManager mAlarmManager; 248 private IMountService mMountService; 249 IBackupManager mBackupManagerBinder; 250 251 boolean mEnabled; // access to this is synchronized on 'this' 252 boolean mProvisioned; 253 boolean mAutoRestore; 254 PowerManager.WakeLock mWakelock; 255 HandlerThread mHandlerThread; 256 BackupHandler mBackupHandler; 257 PendingIntent mRunBackupIntent, mRunInitIntent; 258 BroadcastReceiver mRunBackupReceiver, mRunInitReceiver; 259 // map UIDs to the set of participating packages under that UID 260 final SparseArray<HashSet<String>> mBackupParticipants 261 = new SparseArray<HashSet<String>>(); 262 // set of backup services that have pending changes 263 class BackupRequest { 264 public String packageName; 265 266 BackupRequest(String pkgName) { 267 packageName = pkgName; 268 } 269 270 public String toString() { 271 return "BackupRequest{pkg=" + packageName + "}"; 272 } 273 } 274 // Backups that we haven't started yet. Keys are package names. 275 HashMap<String,BackupRequest> mPendingBackups 276 = new HashMap<String,BackupRequest>(); 277 278 // Pseudoname that we use for the Package Manager metadata "package" 279 static final String PACKAGE_MANAGER_SENTINEL = "@pm@"; 280 281 // locking around the pending-backup management 282 final Object mQueueLock = new Object(); 283 284 // The thread performing the sequence of queued backups binds to each app's agent 285 // in succession. Bind notifications are asynchronously delivered through the 286 // Activity Manager; use this lock object to signal when a requested binding has 287 // completed. 288 final Object mAgentConnectLock = new Object(); 289 IBackupAgent mConnectedAgent; 290 volatile boolean mBackupRunning; 291 volatile boolean mConnecting; 292 volatile long mLastBackupPass; 293 volatile long mNextBackupPass; 294 295 // For debugging, we maintain a progress trace of operations during backup 296 static final boolean DEBUG_BACKUP_TRACE = true; 297 final List<String> mBackupTrace = new ArrayList<String>(); 298 299 // A similar synchronization mechanism around clearing apps' data for restore 300 final Object mClearDataLock = new Object(); 301 volatile boolean mClearingData; 302 303 // Transport bookkeeping 304 final HashMap<String,String> mTransportNames 305 = new HashMap<String,String>(); // component name -> registration name 306 final HashMap<String,IBackupTransport> mTransports 307 = new HashMap<String,IBackupTransport>(); // registration name -> binder 308 final ArrayList<TransportConnection> mTransportConnections 309 = new ArrayList<TransportConnection>(); 310 String mCurrentTransport; 311 ActiveRestoreSession mActiveRestoreSession; 312 313 // Watch the device provisioning operation during setup 314 ContentObserver mProvisionedObserver; 315 316 public static final class Lifecycle extends SystemService { 317 private final BackupManagerService mService; 318 319 public Lifecycle(Context context) { 320 super(context); 321 mService = new BackupManagerService(context); 322 } 323 324 @Override 325 public void onStart() { 326 publishBinderService(Context.BACKUP_SERVICE, mService); 327 } 328 } 329 330 class ProvisionedObserver extends ContentObserver { 331 public ProvisionedObserver(Handler handler) { 332 super(handler); 333 } 334 335 public void onChange(boolean selfChange) { 336 final boolean wasProvisioned = mProvisioned; 337 final boolean isProvisioned = deviceIsProvisioned(); 338 // latch: never unprovision 339 mProvisioned = wasProvisioned || isProvisioned; 340 if (MORE_DEBUG) { 341 Slog.d(TAG, "Provisioning change: was=" + wasProvisioned 342 + " is=" + isProvisioned + " now=" + mProvisioned); 343 } 344 345 synchronized (mQueueLock) { 346 if (mProvisioned && !wasProvisioned && mEnabled) { 347 // we're now good to go, so start the backup alarms 348 if (MORE_DEBUG) Slog.d(TAG, "Now provisioned, so starting backups"); 349 startBackupAlarmsLocked(FIRST_BACKUP_INTERVAL); 350 } 351 } 352 } 353 } 354 355 class RestoreGetSetsParams { 356 public IBackupTransport transport; 357 public ActiveRestoreSession session; 358 public IRestoreObserver observer; 359 360 RestoreGetSetsParams(IBackupTransport _transport, ActiveRestoreSession _session, 361 IRestoreObserver _observer) { 362 transport = _transport; 363 session = _session; 364 observer = _observer; 365 } 366 } 367 368 class RestoreParams { 369 public IBackupTransport transport; 370 public String dirName; 371 public IRestoreObserver observer; 372 public long token; 373 public PackageInfo pkgInfo; 374 public int pmToken; // in post-install restore, the PM's token for this transaction 375 public boolean isSystemRestore; 376 public String[] filterSet; 377 378 // Restore a single package 379 RestoreParams(IBackupTransport _transport, String _dirName, IRestoreObserver _obs, 380 long _token, PackageInfo _pkg, int _pmToken) { 381 transport = _transport; 382 dirName = _dirName; 383 observer = _obs; 384 token = _token; 385 pkgInfo = _pkg; 386 pmToken = _pmToken; 387 isSystemRestore = false; 388 filterSet = null; 389 } 390 391 // Restore everything possible. This is the form that Setup Wizard or similar 392 // restore UXes use. 393 RestoreParams(IBackupTransport _transport, String _dirName, IRestoreObserver _obs, 394 long _token) { 395 transport = _transport; 396 dirName = _dirName; 397 observer = _obs; 398 token = _token; 399 pkgInfo = null; 400 pmToken = 0; 401 isSystemRestore = true; 402 filterSet = null; 403 } 404 405 // Restore some set of packages. Leave this one up to the caller to specify 406 // whether it's to be considered a system-level restore. 407 RestoreParams(IBackupTransport _transport, String _dirName, IRestoreObserver _obs, 408 long _token, String[] _filterSet, boolean _isSystemRestore) { 409 transport = _transport; 410 dirName = _dirName; 411 observer = _obs; 412 token = _token; 413 pkgInfo = null; 414 pmToken = 0; 415 isSystemRestore = _isSystemRestore; 416 filterSet = _filterSet; 417 } 418 } 419 420 class ClearParams { 421 public IBackupTransport transport; 422 public PackageInfo packageInfo; 423 424 ClearParams(IBackupTransport _transport, PackageInfo _info) { 425 transport = _transport; 426 packageInfo = _info; 427 } 428 } 429 430 class ClearRetryParams { 431 public String transportName; 432 public String packageName; 433 434 ClearRetryParams(String transport, String pkg) { 435 transportName = transport; 436 packageName = pkg; 437 } 438 } 439 440 class FullParams { 441 public ParcelFileDescriptor fd; 442 public final AtomicBoolean latch; 443 public IFullBackupRestoreObserver observer; 444 public String curPassword; // filled in by the confirmation step 445 public String encryptPassword; 446 447 FullParams() { 448 latch = new AtomicBoolean(false); 449 } 450 } 451 452 class FullBackupParams extends FullParams { 453 public boolean includeApks; 454 public boolean includeObbs; 455 public boolean includeShared; 456 public boolean doWidgets; 457 public boolean allApps; 458 public boolean includeSystem; 459 public boolean doCompress; 460 public String[] packages; 461 462 FullBackupParams(ParcelFileDescriptor output, boolean saveApks, boolean saveObbs, 463 boolean saveShared, boolean alsoWidgets, boolean doAllApps, boolean doSystem, 464 boolean compress, String[] pkgList) { 465 fd = output; 466 includeApks = saveApks; 467 includeObbs = saveObbs; 468 includeShared = saveShared; 469 doWidgets = alsoWidgets; 470 allApps = doAllApps; 471 includeSystem = doSystem; 472 doCompress = compress; 473 packages = pkgList; 474 } 475 } 476 477 class FullRestoreParams extends FullParams { 478 FullRestoreParams(ParcelFileDescriptor input) { 479 fd = input; 480 } 481 } 482 483 // Bookkeeping of in-flight operations for timeout etc. purposes. The operation 484 // token is the index of the entry in the pending-operations list. 485 static final int OP_PENDING = 0; 486 static final int OP_ACKNOWLEDGED = 1; 487 static final int OP_TIMEOUT = -1; 488 489 class Operation { 490 public int state; 491 public BackupRestoreTask callback; 492 493 Operation(int initialState, BackupRestoreTask callbackObj) { 494 state = initialState; 495 callback = callbackObj; 496 } 497 } 498 final SparseArray<Operation> mCurrentOperations = new SparseArray<Operation>(); 499 final Object mCurrentOpLock = new Object(); 500 final Random mTokenGenerator = new Random(); 501 502 final SparseArray<FullParams> mFullConfirmations = new SparseArray<FullParams>(); 503 504 // Where we keep our journal files and other bookkeeping 505 File mBaseStateDir; 506 File mDataDir; 507 File mJournalDir; 508 File mJournal; 509 510 // Backup password, if any, and the file where it's saved. What is stored is not the 511 // password text itself; it's the result of a PBKDF2 hash with a randomly chosen (but 512 // persisted) salt. Validation is performed by running the challenge text through the 513 // same PBKDF2 cycle with the persisted salt; if the resulting derived key string matches 514 // the saved hash string, then the challenge text matches the originally supplied 515 // password text. 516 private final SecureRandom mRng = new SecureRandom(); 517 private String mPasswordHash; 518 private File mPasswordHashFile; 519 private int mPasswordVersion; 520 private File mPasswordVersionFile; 521 private byte[] mPasswordSalt; 522 523 // Configuration of PBKDF2 that we use for generating pw hashes and intermediate keys 524 static final int PBKDF2_HASH_ROUNDS = 10000; 525 static final int PBKDF2_KEY_SIZE = 256; // bits 526 static final int PBKDF2_SALT_SIZE = 512; // bits 527 static final String ENCRYPTION_ALGORITHM_NAME = "AES-256"; 528 529 // Keep a log of all the apps we've ever backed up, and what the 530 // dataset tokens are for both the current backup dataset and 531 // the ancestral dataset. 532 private File mEverStored; 533 HashSet<String> mEverStoredApps = new HashSet<String>(); 534 535 static final int CURRENT_ANCESTRAL_RECORD_VERSION = 1; // increment when the schema changes 536 File mTokenFile; 537 Set<String> mAncestralPackages = null; 538 long mAncestralToken = 0; 539 long mCurrentToken = 0; 540 541 // Persistently track the need to do a full init 542 static final String INIT_SENTINEL_FILE_NAME = "_need_init_"; 543 HashSet<String> mPendingInits = new HashSet<String>(); // transport names 544 545 // Utility: build a new random integer token 546 int generateToken() { 547 int token; 548 do { 549 synchronized (mTokenGenerator) { 550 token = mTokenGenerator.nextInt(); 551 } 552 } while (token < 0); 553 return token; 554 } 555 556 // High level policy: apps are ineligible for backup if certain conditions apply 557 public static boolean appIsEligibleForBackup(ApplicationInfo app) { 558 // 1. their manifest states android:allowBackup="false" 559 if ((app.flags&ApplicationInfo.FLAG_ALLOW_BACKUP) == 0) { 560 return false; 561 } 562 563 // 2. they run as a system-level uid but do not supply their own backup agent 564 if ((app.uid < Process.FIRST_APPLICATION_UID) && (app.backupAgentName == null)) { 565 return false; 566 } 567 568 // 3. it is the special shared-storage backup package used for 'adb backup' 569 if (app.packageName.equals(BackupManagerService.SHARED_BACKUP_AGENT_PACKAGE)) { 570 return false; 571 } 572 573 return true; 574 } 575 576 // ----- Asynchronous backup/restore handler thread ----- 577 578 private class BackupHandler extends Handler { 579 public BackupHandler(Looper looper) { 580 super(looper); 581 } 582 583 public void handleMessage(Message msg) { 584 585 switch (msg.what) { 586 case MSG_RUN_BACKUP: 587 { 588 mLastBackupPass = System.currentTimeMillis(); 589 mNextBackupPass = mLastBackupPass + BACKUP_INTERVAL; 590 591 IBackupTransport transport = getTransport(mCurrentTransport); 592 if (transport == null) { 593 Slog.v(TAG, "Backup requested but no transport available"); 594 synchronized (mQueueLock) { 595 mBackupRunning = false; 596 } 597 mWakelock.release(); 598 break; 599 } 600 601 // snapshot the pending-backup set and work on that 602 ArrayList<BackupRequest> queue = new ArrayList<BackupRequest>(); 603 File oldJournal = mJournal; 604 synchronized (mQueueLock) { 605 // Do we have any work to do? Construct the work queue 606 // then release the synchronization lock to actually run 607 // the backup. 608 if (mPendingBackups.size() > 0) { 609 for (BackupRequest b: mPendingBackups.values()) { 610 queue.add(b); 611 } 612 if (DEBUG) Slog.v(TAG, "clearing pending backups"); 613 mPendingBackups.clear(); 614 615 // Start a new backup-queue journal file too 616 mJournal = null; 617 618 } 619 } 620 621 // At this point, we have started a new journal file, and the old 622 // file identity is being passed to the backup processing task. 623 // When it completes successfully, that old journal file will be 624 // deleted. If we crash prior to that, the old journal is parsed 625 // at next boot and the journaled requests fulfilled. 626 boolean staged = true; 627 if (queue.size() > 0) { 628 // Spin up a backup state sequence and set it running 629 try { 630 String dirName = transport.transportDirName(); 631 PerformBackupTask pbt = new PerformBackupTask(transport, dirName, 632 queue, oldJournal); 633 Message pbtMessage = obtainMessage(MSG_BACKUP_RESTORE_STEP, pbt); 634 sendMessage(pbtMessage); 635 } catch (RemoteException e) { 636 // unable to ask the transport its dir name -- transient failure, since 637 // the above check succeeded. Try again next time. 638 Slog.e(TAG, "Transport became unavailable attempting backup"); 639 staged = false; 640 } 641 } else { 642 Slog.v(TAG, "Backup requested but nothing pending"); 643 staged = false; 644 } 645 646 if (!staged) { 647 // if we didn't actually hand off the wakelock, rewind until next time 648 synchronized (mQueueLock) { 649 mBackupRunning = false; 650 } 651 mWakelock.release(); 652 } 653 break; 654 } 655 656 case MSG_BACKUP_RESTORE_STEP: 657 { 658 try { 659 BackupRestoreTask task = (BackupRestoreTask) msg.obj; 660 if (MORE_DEBUG) Slog.v(TAG, "Got next step for " + task + ", executing"); 661 task.execute(); 662 } catch (ClassCastException e) { 663 Slog.e(TAG, "Invalid backup task in flight, obj=" + msg.obj); 664 } 665 break; 666 } 667 668 case MSG_OP_COMPLETE: 669 { 670 try { 671 BackupRestoreTask task = (BackupRestoreTask) msg.obj; 672 task.operationComplete(); 673 } catch (ClassCastException e) { 674 Slog.e(TAG, "Invalid completion in flight, obj=" + msg.obj); 675 } 676 break; 677 } 678 679 case MSG_RUN_ADB_BACKUP: 680 { 681 // TODO: refactor full backup to be a looper-based state machine 682 // similar to normal backup/restore. 683 FullBackupParams params = (FullBackupParams)msg.obj; 684 PerformAdbBackupTask task = new PerformAdbBackupTask(params.fd, 685 params.observer, params.includeApks, params.includeObbs, 686 params.includeShared, params.doWidgets, 687 params.curPassword, params.encryptPassword, 688 params.allApps, params.includeSystem, params.doCompress, 689 params.packages, params.latch); 690 (new Thread(task, "adb-backup")).start(); 691 break; 692 } 693 694 case MSG_RUN_FULL_TRANSPORT_BACKUP: 695 { 696 PerformFullTransportBackupTask task = (PerformFullTransportBackupTask) msg.obj; 697 (new Thread(task, "transport-backup")).start(); 698 break; 699 } 700 701 case MSG_RUN_RESTORE: 702 { 703 RestoreParams params = (RestoreParams)msg.obj; 704 Slog.d(TAG, "MSG_RUN_RESTORE observer=" + params.observer); 705 BackupRestoreTask task = new PerformUnifiedRestoreTask(params.transport, 706 params.observer, params.token, params.pkgInfo, params.pmToken, 707 params.isSystemRestore, params.filterSet); 708 Message restoreMsg = obtainMessage(MSG_BACKUP_RESTORE_STEP, task); 709 sendMessage(restoreMsg); 710 break; 711 } 712 713 case MSG_RUN_ADB_RESTORE: 714 { 715 // TODO: refactor full restore to be a looper-based state machine 716 // similar to normal backup/restore. 717 FullRestoreParams params = (FullRestoreParams)msg.obj; 718 PerformAdbRestoreTask task = new PerformAdbRestoreTask(params.fd, 719 params.curPassword, params.encryptPassword, 720 params.observer, params.latch); 721 (new Thread(task, "adb-restore")).start(); 722 break; 723 } 724 725 case MSG_RUN_CLEAR: 726 { 727 ClearParams params = (ClearParams)msg.obj; 728 (new PerformClearTask(params.transport, params.packageInfo)).run(); 729 break; 730 } 731 732 case MSG_RETRY_CLEAR: 733 { 734 // reenqueues if the transport remains unavailable 735 ClearRetryParams params = (ClearRetryParams)msg.obj; 736 clearBackupData(params.transportName, params.packageName); 737 break; 738 } 739 740 case MSG_RUN_INITIALIZE: 741 { 742 HashSet<String> queue; 743 744 // Snapshot the pending-init queue and work on that 745 synchronized (mQueueLock) { 746 queue = new HashSet<String>(mPendingInits); 747 mPendingInits.clear(); 748 } 749 750 (new PerformInitializeTask(queue)).run(); 751 break; 752 } 753 754 case MSG_RETRY_INIT: 755 { 756 synchronized (mQueueLock) { 757 recordInitPendingLocked(msg.arg1 != 0, (String)msg.obj); 758 mAlarmManager.set(AlarmManager.RTC_WAKEUP, System.currentTimeMillis(), 759 mRunInitIntent); 760 } 761 break; 762 } 763 764 case MSG_RUN_GET_RESTORE_SETS: 765 { 766 // Like other async operations, this is entered with the wakelock held 767 RestoreSet[] sets = null; 768 RestoreGetSetsParams params = (RestoreGetSetsParams)msg.obj; 769 try { 770 sets = params.transport.getAvailableRestoreSets(); 771 // cache the result in the active session 772 synchronized (params.session) { 773 params.session.mRestoreSets = sets; 774 } 775 if (sets == null) EventLog.writeEvent(EventLogTags.RESTORE_TRANSPORT_FAILURE); 776 } catch (Exception e) { 777 Slog.e(TAG, "Error from transport getting set list"); 778 } finally { 779 if (params.observer != null) { 780 try { 781 params.observer.restoreSetsAvailable(sets); 782 } catch (RemoteException re) { 783 Slog.e(TAG, "Unable to report listing to observer"); 784 } catch (Exception e) { 785 Slog.e(TAG, "Restore observer threw", e); 786 } 787 } 788 789 // Done: reset the session timeout clock 790 removeMessages(MSG_RESTORE_TIMEOUT); 791 sendEmptyMessageDelayed(MSG_RESTORE_TIMEOUT, TIMEOUT_RESTORE_INTERVAL); 792 793 mWakelock.release(); 794 } 795 break; 796 } 797 798 case MSG_TIMEOUT: 799 { 800 handleTimeout(msg.arg1, msg.obj); 801 break; 802 } 803 804 case MSG_RESTORE_TIMEOUT: 805 { 806 synchronized (BackupManagerService.this) { 807 if (mActiveRestoreSession != null) { 808 // Client app left the restore session dangling. We know that it 809 // can't be in the middle of an actual restore operation because 810 // the timeout is suspended while a restore is in progress. Clean 811 // up now. 812 Slog.w(TAG, "Restore session timed out; aborting"); 813 post(mActiveRestoreSession.new EndRestoreRunnable( 814 BackupManagerService.this, mActiveRestoreSession)); 815 } 816 } 817 } 818 819 case MSG_FULL_CONFIRMATION_TIMEOUT: 820 { 821 synchronized (mFullConfirmations) { 822 FullParams params = mFullConfirmations.get(msg.arg1); 823 if (params != null) { 824 Slog.i(TAG, "Full backup/restore timed out waiting for user confirmation"); 825 826 // Release the waiter; timeout == completion 827 signalFullBackupRestoreCompletion(params); 828 829 // Remove the token from the set 830 mFullConfirmations.delete(msg.arg1); 831 832 // Report a timeout to the observer, if any 833 if (params.observer != null) { 834 try { 835 params.observer.onTimeout(); 836 } catch (RemoteException e) { 837 /* don't care if the app has gone away */ 838 } 839 } 840 } else { 841 Slog.d(TAG, "couldn't find params for token " + msg.arg1); 842 } 843 } 844 break; 845 } 846 847 case MSG_WIDGET_BROADCAST: 848 { 849 final Intent intent = (Intent) msg.obj; 850 mContext.sendBroadcastAsUser(intent, UserHandle.OWNER); 851 break; 852 } 853 } 854 } 855 } 856 857 // ----- Debug-only backup operation trace ----- 858 void addBackupTrace(String s) { 859 if (DEBUG_BACKUP_TRACE) { 860 synchronized (mBackupTrace) { 861 mBackupTrace.add(s); 862 } 863 } 864 } 865 866 void clearBackupTrace() { 867 if (DEBUG_BACKUP_TRACE) { 868 synchronized (mBackupTrace) { 869 mBackupTrace.clear(); 870 } 871 } 872 } 873 874 // ----- Main service implementation ----- 875 876 public BackupManagerService(Context context) { 877 mContext = context; 878 mPackageManager = context.getPackageManager(); 879 mPackageManagerBinder = AppGlobals.getPackageManager(); 880 mActivityManager = ActivityManagerNative.getDefault(); 881 882 mAlarmManager = (AlarmManager) context.getSystemService(Context.ALARM_SERVICE); 883 mPowerManager = (PowerManager) context.getSystemService(Context.POWER_SERVICE); 884 mMountService = IMountService.Stub.asInterface(ServiceManager.getService("mount")); 885 886 mBackupManagerBinder = asInterface(asBinder()); 887 888 // spin up the backup/restore handler thread 889 mHandlerThread = new HandlerThread("backup", Process.THREAD_PRIORITY_BACKGROUND); 890 mHandlerThread.start(); 891 mBackupHandler = new BackupHandler(mHandlerThread.getLooper()); 892 893 // Set up our bookkeeping 894 final ContentResolver resolver = context.getContentResolver(); 895 boolean areEnabled = Settings.Secure.getInt(resolver, 896 Settings.Secure.BACKUP_ENABLED, 0) != 0; 897 mProvisioned = Settings.Global.getInt(resolver, 898 Settings.Global.DEVICE_PROVISIONED, 0) != 0; 899 mAutoRestore = Settings.Secure.getInt(resolver, 900 Settings.Secure.BACKUP_AUTO_RESTORE, 1) != 0; 901 902 mProvisionedObserver = new ProvisionedObserver(mBackupHandler); 903 resolver.registerContentObserver( 904 Settings.Global.getUriFor(Settings.Global.DEVICE_PROVISIONED), 905 false, mProvisionedObserver); 906 907 // If Encrypted file systems is enabled or disabled, this call will return the 908 // correct directory. 909 mBaseStateDir = new File(Environment.getSecureDataDirectory(), "backup"); 910 mBaseStateDir.mkdirs(); 911 if (!SELinux.restorecon(mBaseStateDir)) { 912 Slog.e(TAG, "SELinux restorecon failed on " + mBaseStateDir); 913 } 914 mDataDir = Environment.getDownloadCacheDirectory(); 915 916 mPasswordVersion = 1; // unless we hear otherwise 917 mPasswordVersionFile = new File(mBaseStateDir, "pwversion"); 918 if (mPasswordVersionFile.exists()) { 919 FileInputStream fin = null; 920 DataInputStream in = null; 921 try { 922 fin = new FileInputStream(mPasswordVersionFile); 923 in = new DataInputStream(fin); 924 mPasswordVersion = in.readInt(); 925 } catch (IOException e) { 926 Slog.e(TAG, "Unable to read backup pw version"); 927 } finally { 928 try { 929 if (in != null) in.close(); 930 if (fin != null) fin.close(); 931 } catch (IOException e) { 932 Slog.w(TAG, "Error closing pw version files"); 933 } 934 } 935 } 936 937 mPasswordHashFile = new File(mBaseStateDir, "pwhash"); 938 if (mPasswordHashFile.exists()) { 939 FileInputStream fin = null; 940 DataInputStream in = null; 941 try { 942 fin = new FileInputStream(mPasswordHashFile); 943 in = new DataInputStream(new BufferedInputStream(fin)); 944 // integer length of the salt array, followed by the salt, 945 // then the hex pw hash string 946 int saltLen = in.readInt(); 947 byte[] salt = new byte[saltLen]; 948 in.readFully(salt); 949 mPasswordHash = in.readUTF(); 950 mPasswordSalt = salt; 951 } catch (IOException e) { 952 Slog.e(TAG, "Unable to read saved backup pw hash"); 953 } finally { 954 try { 955 if (in != null) in.close(); 956 if (fin != null) fin.close(); 957 } catch (IOException e) { 958 Slog.w(TAG, "Unable to close streams"); 959 } 960 } 961 } 962 963 // Alarm receivers for scheduled backups & initialization operations 964 mRunBackupReceiver = new RunBackupReceiver(); 965 IntentFilter filter = new IntentFilter(); 966 filter.addAction(RUN_BACKUP_ACTION); 967 context.registerReceiver(mRunBackupReceiver, filter, 968 android.Manifest.permission.BACKUP, null); 969 970 mRunInitReceiver = new RunInitializeReceiver(); 971 filter = new IntentFilter(); 972 filter.addAction(RUN_INITIALIZE_ACTION); 973 context.registerReceiver(mRunInitReceiver, filter, 974 android.Manifest.permission.BACKUP, null); 975 976 Intent backupIntent = new Intent(RUN_BACKUP_ACTION); 977 backupIntent.addFlags(Intent.FLAG_RECEIVER_REGISTERED_ONLY); 978 mRunBackupIntent = PendingIntent.getBroadcast(context, MSG_RUN_BACKUP, backupIntent, 0); 979 980 Intent initIntent = new Intent(RUN_INITIALIZE_ACTION); 981 backupIntent.addFlags(Intent.FLAG_RECEIVER_REGISTERED_ONLY); 982 mRunInitIntent = PendingIntent.getBroadcast(context, MSG_RUN_INITIALIZE, initIntent, 0); 983 984 // Set up the backup-request journaling 985 mJournalDir = new File(mBaseStateDir, "pending"); 986 mJournalDir.mkdirs(); // creates mBaseStateDir along the way 987 mJournal = null; // will be created on first use 988 989 // Set up the various sorts of package tracking we do 990 initPackageTracking(); 991 992 // Build our mapping of uid to backup client services. This implicitly 993 // schedules a backup pass on the Package Manager metadata the first 994 // time anything needs to be backed up. 995 synchronized (mBackupParticipants) { 996 addPackageParticipantsLocked(null); 997 } 998 999 // Set up our transport options and initialize the default transport 1000 // TODO: Don't create transports that we don't need to? 1001 mCurrentTransport = Settings.Secure.getString(context.getContentResolver(), 1002 Settings.Secure.BACKUP_TRANSPORT); 1003 if ("".equals(mCurrentTransport)) { 1004 mCurrentTransport = null; 1005 } 1006 if (DEBUG) Slog.v(TAG, "Starting with transport " + mCurrentTransport); 1007 1008 // Find transport hosts and bind to their services 1009 Intent transportServiceIntent = new Intent(SERVICE_ACTION_TRANSPORT_HOST); 1010 List<ResolveInfo> hosts = mPackageManager.queryIntentServicesAsUser( 1011 transportServiceIntent, 0, UserHandle.USER_OWNER); 1012 if (DEBUG) { 1013 Slog.v(TAG, "Found transports: " + ((hosts == null) ? "null" : hosts.size())); 1014 } 1015 if (hosts != null) { 1016 if (MORE_DEBUG) { 1017 for (int i = 0; i < hosts.size(); i++) { 1018 ServiceInfo info = hosts.get(i).serviceInfo; 1019 Slog.v(TAG, " " + info.packageName + "/" + info.name); 1020 } 1021 } 1022 for (int i = 0; i < hosts.size(); i++) { 1023 try { 1024 ServiceInfo info = hosts.get(i).serviceInfo; 1025 PackageInfo packInfo = mPackageManager.getPackageInfo(info.packageName, 0); 1026 if ((packInfo.applicationInfo.flags & ApplicationInfo.FLAG_PRIVILEGED) != 0) { 1027 ComponentName svcName = new ComponentName(info.packageName, info.name); 1028 if (DEBUG) { 1029 Slog.i(TAG, "Binding to transport host " + svcName); 1030 } 1031 Intent intent = new Intent(transportServiceIntent); 1032 intent.setComponent(svcName); 1033 TransportConnection connection = new TransportConnection(); 1034 mTransportConnections.add(connection); 1035 context.bindServiceAsUser(intent, 1036 connection, Context.BIND_AUTO_CREATE, 1037 UserHandle.OWNER); 1038 } else { 1039 Slog.w(TAG, "Transport package not privileged: " + info.packageName); 1040 } 1041 } catch (Exception e) { 1042 Slog.e(TAG, "Problem resolving transport service: " + e.getMessage()); 1043 } 1044 } 1045 } 1046 1047 // Now that we know about valid backup participants, parse any 1048 // leftover journal files into the pending backup set 1049 parseLeftoverJournals(); 1050 1051 // Power management 1052 mWakelock = mPowerManager.newWakeLock(PowerManager.PARTIAL_WAKE_LOCK, "*backup*"); 1053 1054 // Start the backup passes going 1055 setBackupEnabled(areEnabled); 1056 } 1057 1058 private class RunBackupReceiver extends BroadcastReceiver { 1059 public void onReceive(Context context, Intent intent) { 1060 if (RUN_BACKUP_ACTION.equals(intent.getAction())) { 1061 synchronized (mQueueLock) { 1062 if (mPendingInits.size() > 0) { 1063 // If there are pending init operations, we process those 1064 // and then settle into the usual periodic backup schedule. 1065 if (DEBUG) Slog.v(TAG, "Init pending at scheduled backup"); 1066 try { 1067 mAlarmManager.cancel(mRunInitIntent); 1068 mRunInitIntent.send(); 1069 } catch (PendingIntent.CanceledException ce) { 1070 Slog.e(TAG, "Run init intent cancelled"); 1071 // can't really do more than bail here 1072 } 1073 } else { 1074 // Don't run backups now if we're disabled or not yet 1075 // fully set up. 1076 if (mEnabled && mProvisioned) { 1077 if (!mBackupRunning) { 1078 if (DEBUG) Slog.v(TAG, "Running a backup pass"); 1079 1080 // Acquire the wakelock and pass it to the backup thread. it will 1081 // be released once backup concludes. 1082 mBackupRunning = true; 1083 mWakelock.acquire(); 1084 1085 Message msg = mBackupHandler.obtainMessage(MSG_RUN_BACKUP); 1086 mBackupHandler.sendMessage(msg); 1087 } else { 1088 Slog.i(TAG, "Backup time but one already running"); 1089 } 1090 } else { 1091 Slog.w(TAG, "Backup pass but e=" + mEnabled + " p=" + mProvisioned); 1092 } 1093 } 1094 } 1095 } 1096 } 1097 } 1098 1099 private class RunInitializeReceiver extends BroadcastReceiver { 1100 public void onReceive(Context context, Intent intent) { 1101 if (RUN_INITIALIZE_ACTION.equals(intent.getAction())) { 1102 synchronized (mQueueLock) { 1103 if (DEBUG) Slog.v(TAG, "Running a device init"); 1104 1105 // Acquire the wakelock and pass it to the init thread. it will 1106 // be released once init concludes. 1107 mWakelock.acquire(); 1108 1109 Message msg = mBackupHandler.obtainMessage(MSG_RUN_INITIALIZE); 1110 mBackupHandler.sendMessage(msg); 1111 } 1112 } 1113 } 1114 } 1115 1116 private void initPackageTracking() { 1117 if (MORE_DEBUG) Slog.v(TAG, "` tracking"); 1118 1119 // Remember our ancestral dataset 1120 mTokenFile = new File(mBaseStateDir, "ancestral"); 1121 try { 1122 RandomAccessFile tf = new RandomAccessFile(mTokenFile, "r"); 1123 int version = tf.readInt(); 1124 if (version == CURRENT_ANCESTRAL_RECORD_VERSION) { 1125 mAncestralToken = tf.readLong(); 1126 mCurrentToken = tf.readLong(); 1127 1128 int numPackages = tf.readInt(); 1129 if (numPackages >= 0) { 1130 mAncestralPackages = new HashSet<String>(); 1131 for (int i = 0; i < numPackages; i++) { 1132 String pkgName = tf.readUTF(); 1133 mAncestralPackages.add(pkgName); 1134 } 1135 } 1136 } 1137 tf.close(); 1138 } catch (FileNotFoundException fnf) { 1139 // Probably innocuous 1140 Slog.v(TAG, "No ancestral data"); 1141 } catch (IOException e) { 1142 Slog.w(TAG, "Unable to read token file", e); 1143 } 1144 1145 // Keep a log of what apps we've ever backed up. Because we might have 1146 // rebooted in the middle of an operation that was removing something from 1147 // this log, we sanity-check its contents here and reconstruct it. 1148 mEverStored = new File(mBaseStateDir, "processed"); 1149 File tempProcessedFile = new File(mBaseStateDir, "processed.new"); 1150 1151 // If we were in the middle of removing something from the ever-backed-up 1152 // file, there might be a transient "processed.new" file still present. 1153 // Ignore it -- we'll validate "processed" against the current package set. 1154 if (tempProcessedFile.exists()) { 1155 tempProcessedFile.delete(); 1156 } 1157 1158 // If there are previous contents, parse them out then start a new 1159 // file to continue the recordkeeping. 1160 if (mEverStored.exists()) { 1161 RandomAccessFile temp = null; 1162 RandomAccessFile in = null; 1163 1164 try { 1165 temp = new RandomAccessFile(tempProcessedFile, "rws"); 1166 in = new RandomAccessFile(mEverStored, "r"); 1167 1168 while (true) { 1169 PackageInfo info; 1170 String pkg = in.readUTF(); 1171 try { 1172 info = mPackageManager.getPackageInfo(pkg, 0); 1173 mEverStoredApps.add(pkg); 1174 temp.writeUTF(pkg); 1175 if (MORE_DEBUG) Slog.v(TAG, " + " + pkg); 1176 } catch (NameNotFoundException e) { 1177 // nope, this package was uninstalled; don't include it 1178 if (MORE_DEBUG) Slog.v(TAG, " - " + pkg); 1179 } 1180 } 1181 } catch (EOFException e) { 1182 // Once we've rewritten the backup history log, atomically replace the 1183 // old one with the new one then reopen the file for continuing use. 1184 if (!tempProcessedFile.renameTo(mEverStored)) { 1185 Slog.e(TAG, "Error renaming " + tempProcessedFile + " to " + mEverStored); 1186 } 1187 } catch (IOException e) { 1188 Slog.e(TAG, "Error in processed file", e); 1189 } finally { 1190 try { if (temp != null) temp.close(); } catch (IOException e) {} 1191 try { if (in != null) in.close(); } catch (IOException e) {} 1192 } 1193 } 1194 1195 // Register for broadcasts about package install, etc., so we can 1196 // update the provider list. 1197 IntentFilter filter = new IntentFilter(); 1198 filter.addAction(Intent.ACTION_PACKAGE_ADDED); 1199 filter.addAction(Intent.ACTION_PACKAGE_REMOVED); 1200 filter.addDataScheme("package"); 1201 mContext.registerReceiver(mBroadcastReceiver, filter); 1202 // Register for events related to sdcard installation. 1203 IntentFilter sdFilter = new IntentFilter(); 1204 sdFilter.addAction(Intent.ACTION_EXTERNAL_APPLICATIONS_AVAILABLE); 1205 sdFilter.addAction(Intent.ACTION_EXTERNAL_APPLICATIONS_UNAVAILABLE); 1206 mContext.registerReceiver(mBroadcastReceiver, sdFilter); 1207 } 1208 1209 private void parseLeftoverJournals() { 1210 for (File f : mJournalDir.listFiles()) { 1211 if (mJournal == null || f.compareTo(mJournal) != 0) { 1212 // This isn't the current journal, so it must be a leftover. Read 1213 // out the package names mentioned there and schedule them for 1214 // backup. 1215 RandomAccessFile in = null; 1216 try { 1217 Slog.i(TAG, "Found stale backup journal, scheduling"); 1218 in = new RandomAccessFile(f, "r"); 1219 while (true) { 1220 String packageName = in.readUTF(); 1221 if (MORE_DEBUG) Slog.i(TAG, " " + packageName); 1222 dataChangedImpl(packageName); 1223 } 1224 } catch (EOFException e) { 1225 // no more data; we're done 1226 } catch (Exception e) { 1227 Slog.e(TAG, "Can't read " + f, e); 1228 } finally { 1229 // close/delete the file 1230 try { if (in != null) in.close(); } catch (IOException e) {} 1231 f.delete(); 1232 } 1233 } 1234 } 1235 } 1236 1237 private SecretKey buildPasswordKey(String algorithm, String pw, byte[] salt, int rounds) { 1238 return buildCharArrayKey(algorithm, pw.toCharArray(), salt, rounds); 1239 } 1240 1241 private SecretKey buildCharArrayKey(String algorithm, char[] pwArray, byte[] salt, int rounds) { 1242 try { 1243 SecretKeyFactory keyFactory = SecretKeyFactory.getInstance(algorithm); 1244 KeySpec ks = new PBEKeySpec(pwArray, salt, rounds, PBKDF2_KEY_SIZE); 1245 return keyFactory.generateSecret(ks); 1246 } catch (InvalidKeySpecException e) { 1247 Slog.e(TAG, "Invalid key spec for PBKDF2!"); 1248 } catch (NoSuchAlgorithmException e) { 1249 Slog.e(TAG, "PBKDF2 unavailable!"); 1250 } 1251 return null; 1252 } 1253 1254 private String buildPasswordHash(String algorithm, String pw, byte[] salt, int rounds) { 1255 SecretKey key = buildPasswordKey(algorithm, pw, salt, rounds); 1256 if (key != null) { 1257 return byteArrayToHex(key.getEncoded()); 1258 } 1259 return null; 1260 } 1261 1262 private String byteArrayToHex(byte[] data) { 1263 StringBuilder buf = new StringBuilder(data.length * 2); 1264 for (int i = 0; i < data.length; i++) { 1265 buf.append(Byte.toHexString(data[i], true)); 1266 } 1267 return buf.toString(); 1268 } 1269 1270 private byte[] hexToByteArray(String digits) { 1271 final int bytes = digits.length() / 2; 1272 if (2*bytes != digits.length()) { 1273 throw new IllegalArgumentException("Hex string must have an even number of digits"); 1274 } 1275 1276 byte[] result = new byte[bytes]; 1277 for (int i = 0; i < digits.length(); i += 2) { 1278 result[i/2] = (byte) Integer.parseInt(digits.substring(i, i+2), 16); 1279 } 1280 return result; 1281 } 1282 1283 private byte[] makeKeyChecksum(String algorithm, byte[] pwBytes, byte[] salt, int rounds) { 1284 char[] mkAsChar = new char[pwBytes.length]; 1285 for (int i = 0; i < pwBytes.length; i++) { 1286 mkAsChar[i] = (char) pwBytes[i]; 1287 } 1288 1289 Key checksum = buildCharArrayKey(algorithm, mkAsChar, salt, rounds); 1290 return checksum.getEncoded(); 1291 } 1292 1293 // Used for generating random salts or passwords 1294 private byte[] randomBytes(int bits) { 1295 byte[] array = new byte[bits / 8]; 1296 mRng.nextBytes(array); 1297 return array; 1298 } 1299 1300 // Backup password management 1301 boolean passwordMatchesSaved(String algorithm, String candidatePw, int rounds) { 1302 // First, on an encrypted device we require matching the device pw 1303 final boolean isEncrypted; 1304 try { 1305 isEncrypted = (mMountService.getEncryptionState() != 1306 IMountService.ENCRYPTION_STATE_NONE); 1307 if (isEncrypted) { 1308 if (DEBUG) { 1309 Slog.i(TAG, "Device encrypted; verifying against device data pw"); 1310 } 1311 // 0 means the password validated 1312 // -2 means device not encrypted 1313 // Any other result is either password failure or an error condition, 1314 // so we refuse the match 1315 final int result = mMountService.verifyEncryptionPassword(candidatePw); 1316 if (result == 0) { 1317 if (MORE_DEBUG) Slog.d(TAG, "Pw verifies"); 1318 return true; 1319 } else if (result != -2) { 1320 if (MORE_DEBUG) Slog.d(TAG, "Pw mismatch"); 1321 return false; 1322 } else { 1323 // ...else the device is supposedly not encrypted. HOWEVER, the 1324 // query about the encryption state said that the device *is* 1325 // encrypted, so ... we may have a problem. Log it and refuse 1326 // the backup. 1327 Slog.e(TAG, "verified encryption state mismatch against query; no match allowed"); 1328 return false; 1329 } 1330 } 1331 } catch (Exception e) { 1332 // Something went wrong talking to the mount service. This is very bad; 1333 // assume that we fail password validation. 1334 return false; 1335 } 1336 1337 if (mPasswordHash == null) { 1338 // no current password case -- require that 'currentPw' be null or empty 1339 if (candidatePw == null || "".equals(candidatePw)) { 1340 return true; 1341 } // else the non-empty candidate does not match the empty stored pw 1342 } else { 1343 // hash the stated current pw and compare to the stored one 1344 if (candidatePw != null && candidatePw.length() > 0) { 1345 String currentPwHash = buildPasswordHash(algorithm, candidatePw, mPasswordSalt, rounds); 1346 if (mPasswordHash.equalsIgnoreCase(currentPwHash)) { 1347 // candidate hash matches the stored hash -- the password matches 1348 return true; 1349 } 1350 } // else the stored pw is nonempty but the candidate is empty; no match 1351 } 1352 return false; 1353 } 1354 1355 @Override 1356 public boolean setBackupPassword(String currentPw, String newPw) { 1357 mContext.enforceCallingOrSelfPermission(android.Manifest.permission.BACKUP, 1358 "setBackupPassword"); 1359 1360 // When processing v1 passwords we may need to try two different PBKDF2 checksum regimes 1361 final boolean pbkdf2Fallback = (mPasswordVersion < BACKUP_PW_FILE_VERSION); 1362 1363 // If the supplied pw doesn't hash to the the saved one, fail. The password 1364 // might be caught in the legacy crypto mismatch; verify that too. 1365 if (!passwordMatchesSaved(PBKDF_CURRENT, currentPw, PBKDF2_HASH_ROUNDS) 1366 && !(pbkdf2Fallback && passwordMatchesSaved(PBKDF_FALLBACK, 1367 currentPw, PBKDF2_HASH_ROUNDS))) { 1368 return false; 1369 } 1370 1371 // Snap up to current on the pw file version 1372 mPasswordVersion = BACKUP_PW_FILE_VERSION; 1373 FileOutputStream pwFout = null; 1374 DataOutputStream pwOut = null; 1375 try { 1376 pwFout = new FileOutputStream(mPasswordVersionFile); 1377 pwOut = new DataOutputStream(pwFout); 1378 pwOut.writeInt(mPasswordVersion); 1379 } catch (IOException e) { 1380 Slog.e(TAG, "Unable to write backup pw version; password not changed"); 1381 return false; 1382 } finally { 1383 try { 1384 if (pwOut != null) pwOut.close(); 1385 if (pwFout != null) pwFout.close(); 1386 } catch (IOException e) { 1387 Slog.w(TAG, "Unable to close pw version record"); 1388 } 1389 } 1390 1391 // Clearing the password is okay 1392 if (newPw == null || newPw.isEmpty()) { 1393 if (mPasswordHashFile.exists()) { 1394 if (!mPasswordHashFile.delete()) { 1395 // Unable to delete the old pw file, so fail 1396 Slog.e(TAG, "Unable to clear backup password"); 1397 return false; 1398 } 1399 } 1400 mPasswordHash = null; 1401 mPasswordSalt = null; 1402 return true; 1403 } 1404 1405 try { 1406 // Okay, build the hash of the new backup password 1407 byte[] salt = randomBytes(PBKDF2_SALT_SIZE); 1408 String newPwHash = buildPasswordHash(PBKDF_CURRENT, newPw, salt, PBKDF2_HASH_ROUNDS); 1409 1410 OutputStream pwf = null, buffer = null; 1411 DataOutputStream out = null; 1412 try { 1413 pwf = new FileOutputStream(mPasswordHashFile); 1414 buffer = new BufferedOutputStream(pwf); 1415 out = new DataOutputStream(buffer); 1416 // integer length of the salt array, followed by the salt, 1417 // then the hex pw hash string 1418 out.writeInt(salt.length); 1419 out.write(salt); 1420 out.writeUTF(newPwHash); 1421 out.flush(); 1422 mPasswordHash = newPwHash; 1423 mPasswordSalt = salt; 1424 return true; 1425 } finally { 1426 if (out != null) out.close(); 1427 if (buffer != null) buffer.close(); 1428 if (pwf != null) pwf.close(); 1429 } 1430 } catch (IOException e) { 1431 Slog.e(TAG, "Unable to set backup password"); 1432 } 1433 return false; 1434 } 1435 1436 @Override 1437 public boolean hasBackupPassword() { 1438 mContext.enforceCallingOrSelfPermission(android.Manifest.permission.BACKUP, 1439 "hasBackupPassword"); 1440 1441 try { 1442 return (mMountService.getEncryptionState() != IMountService.ENCRYPTION_STATE_NONE) 1443 || (mPasswordHash != null && mPasswordHash.length() > 0); 1444 } catch (Exception e) { 1445 // If we can't talk to the mount service we have a serious problem; fail 1446 // "secure" i.e. assuming that we require a password 1447 return true; 1448 } 1449 } 1450 1451 private boolean backupPasswordMatches(String currentPw) { 1452 if (hasBackupPassword()) { 1453 final boolean pbkdf2Fallback = (mPasswordVersion < BACKUP_PW_FILE_VERSION); 1454 if (!passwordMatchesSaved(PBKDF_CURRENT, currentPw, PBKDF2_HASH_ROUNDS) 1455 && !(pbkdf2Fallback && passwordMatchesSaved(PBKDF_FALLBACK, 1456 currentPw, PBKDF2_HASH_ROUNDS))) { 1457 if (DEBUG) Slog.w(TAG, "Backup password mismatch; aborting"); 1458 return false; 1459 } 1460 } 1461 return true; 1462 } 1463 1464 // Maintain persistent state around whether need to do an initialize operation. 1465 // Must be called with the queue lock held. 1466 void recordInitPendingLocked(boolean isPending, String transportName) { 1467 if (DEBUG) Slog.i(TAG, "recordInitPendingLocked: " + isPending 1468 + " on transport " + transportName); 1469 mBackupHandler.removeMessages(MSG_RETRY_INIT); 1470 1471 try { 1472 IBackupTransport transport = getTransport(transportName); 1473 if (transport != null) { 1474 String transportDirName = transport.transportDirName(); 1475 File stateDir = new File(mBaseStateDir, transportDirName); 1476 File initPendingFile = new File(stateDir, INIT_SENTINEL_FILE_NAME); 1477 1478 if (isPending) { 1479 // We need an init before we can proceed with sending backup data. 1480 // Record that with an entry in our set of pending inits, as well as 1481 // journaling it via creation of a sentinel file. 1482 mPendingInits.add(transportName); 1483 try { 1484 (new FileOutputStream(initPendingFile)).close(); 1485 } catch (IOException ioe) { 1486 // Something is badly wrong with our permissions; just try to move on 1487 } 1488 } else { 1489 // No more initialization needed; wipe the journal and reset our state. 1490 initPendingFile.delete(); 1491 mPendingInits.remove(transportName); 1492 } 1493 return; // done; don't fall through to the error case 1494 } 1495 } catch (RemoteException e) { 1496 // transport threw when asked its name; fall through to the lookup-failed case 1497 } 1498 1499 // The named transport doesn't exist or threw. This operation is 1500 // important, so we record the need for a an init and post a message 1501 // to retry the init later. 1502 if (isPending) { 1503 mPendingInits.add(transportName); 1504 mBackupHandler.sendMessageDelayed( 1505 mBackupHandler.obtainMessage(MSG_RETRY_INIT, 1506 (isPending ? 1 : 0), 1507 0, 1508 transportName), 1509 TRANSPORT_RETRY_INTERVAL); 1510 } 1511 } 1512 1513 // Reset all of our bookkeeping, in response to having been told that 1514 // the backend data has been wiped [due to idle expiry, for example], 1515 // so we must re-upload all saved settings. 1516 void resetBackupState(File stateFileDir) { 1517 synchronized (mQueueLock) { 1518 // Wipe the "what we've ever backed up" tracking 1519 mEverStoredApps.clear(); 1520 mEverStored.delete(); 1521 1522 mCurrentToken = 0; 1523 writeRestoreTokens(); 1524 1525 // Remove all the state files 1526 for (File sf : stateFileDir.listFiles()) { 1527 // ... but don't touch the needs-init sentinel 1528 if (!sf.getName().equals(INIT_SENTINEL_FILE_NAME)) { 1529 sf.delete(); 1530 } 1531 } 1532 } 1533 1534 // Enqueue a new backup of every participant 1535 synchronized (mBackupParticipants) { 1536 final int N = mBackupParticipants.size(); 1537 for (int i=0; i<N; i++) { 1538 HashSet<String> participants = mBackupParticipants.valueAt(i); 1539 if (participants != null) { 1540 for (String packageName : participants) { 1541 dataChangedImpl(packageName); 1542 } 1543 } 1544 } 1545 } 1546 } 1547 1548 // Add a transport to our set of available backends. If 'transport' is null, this 1549 // is an unregistration, and the transport's entry is removed from our bookkeeping. 1550 private void registerTransport(String name, String component, IBackupTransport transport) { 1551 synchronized (mTransports) { 1552 if (DEBUG) Slog.v(TAG, "Registering transport " 1553 + component + "::" + name + " = " + transport); 1554 if (transport != null) { 1555 mTransports.put(name, transport); 1556 mTransportNames.put(component, name); 1557 } else { 1558 mTransports.remove(mTransportNames.get(component)); 1559 mTransportNames.remove(component); 1560 // Nothing further to do in the unregistration case 1561 return; 1562 } 1563 } 1564 1565 // If the init sentinel file exists, we need to be sure to perform the init 1566 // as soon as practical. We also create the state directory at registration 1567 // time to ensure it's present from the outset. 1568 try { 1569 String transportName = transport.transportDirName(); 1570 File stateDir = new File(mBaseStateDir, transportName); 1571 stateDir.mkdirs(); 1572 1573 File initSentinel = new File(stateDir, INIT_SENTINEL_FILE_NAME); 1574 if (initSentinel.exists()) { 1575 synchronized (mQueueLock) { 1576 mPendingInits.add(transportName); 1577 1578 // TODO: pick a better starting time than now + 1 minute 1579 long delay = 1000 * 60; // one minute, in milliseconds 1580 mAlarmManager.set(AlarmManager.RTC_WAKEUP, 1581 System.currentTimeMillis() + delay, mRunInitIntent); 1582 } 1583 } 1584 } catch (RemoteException e) { 1585 // the transport threw when asked its file naming prefs; declare it invalid 1586 Slog.e(TAG, "Unable to register transport as " + name); 1587 mTransportNames.remove(component); 1588 mTransports.remove(name); 1589 } 1590 } 1591 1592 // ----- Track installation/removal of packages ----- 1593 BroadcastReceiver mBroadcastReceiver = new BroadcastReceiver() { 1594 public void onReceive(Context context, Intent intent) { 1595 if (DEBUG) Slog.d(TAG, "Received broadcast " + intent); 1596 1597 String action = intent.getAction(); 1598 boolean replacing = false; 1599 boolean added = false; 1600 Bundle extras = intent.getExtras(); 1601 String pkgList[] = null; 1602 if (Intent.ACTION_PACKAGE_ADDED.equals(action) || 1603 Intent.ACTION_PACKAGE_REMOVED.equals(action)) { 1604 Uri uri = intent.getData(); 1605 if (uri == null) { 1606 return; 1607 } 1608 String pkgName = uri.getSchemeSpecificPart(); 1609 if (pkgName != null) { 1610 pkgList = new String[] { pkgName }; 1611 } 1612 added = Intent.ACTION_PACKAGE_ADDED.equals(action); 1613 replacing = extras.getBoolean(Intent.EXTRA_REPLACING, false); 1614 } else if (Intent.ACTION_EXTERNAL_APPLICATIONS_AVAILABLE.equals(action)) { 1615 added = true; 1616 pkgList = intent.getStringArrayExtra(Intent.EXTRA_CHANGED_PACKAGE_LIST); 1617 } else if (Intent.ACTION_EXTERNAL_APPLICATIONS_UNAVAILABLE.equals(action)) { 1618 added = false; 1619 pkgList = intent.getStringArrayExtra(Intent.EXTRA_CHANGED_PACKAGE_LIST); 1620 } 1621 1622 if (pkgList == null || pkgList.length == 0) { 1623 return; 1624 } 1625 1626 final int uid = extras.getInt(Intent.EXTRA_UID); 1627 if (added) { 1628 synchronized (mBackupParticipants) { 1629 if (replacing) { 1630 // This is the package-replaced case; we just remove the entry 1631 // under the old uid and fall through to re-add. 1632 removePackageParticipantsLocked(pkgList, uid); 1633 } 1634 addPackageParticipantsLocked(pkgList); 1635 } 1636 } else { 1637 if (replacing) { 1638 // The package is being updated. We'll receive a PACKAGE_ADDED shortly. 1639 } else { 1640 synchronized (mBackupParticipants) { 1641 removePackageParticipantsLocked(pkgList, uid); 1642 } 1643 } 1644 } 1645 } 1646 }; 1647 1648 // ----- Track connection to transports service ----- 1649 class TransportConnection implements ServiceConnection { 1650 @Override 1651 public void onServiceConnected(ComponentName component, IBinder service) { 1652 if (DEBUG) Slog.v(TAG, "Connected to transport " + component); 1653 try { 1654 IBackupTransport transport = IBackupTransport.Stub.asInterface(service); 1655 registerTransport(transport.name(), component.flattenToShortString(), transport); 1656 } catch (RemoteException e) { 1657 Slog.e(TAG, "Unable to register transport " + component); 1658 } 1659 } 1660 1661 @Override 1662 public void onServiceDisconnected(ComponentName component) { 1663 if (DEBUG) Slog.v(TAG, "Disconnected from transport " + component); 1664 registerTransport(null, component.flattenToShortString(), null); 1665 } 1666 }; 1667 1668 // Add the backup agents in the given packages to our set of known backup participants. 1669 // If 'packageNames' is null, adds all backup agents in the whole system. 1670 void addPackageParticipantsLocked(String[] packageNames) { 1671 // Look for apps that define the android:backupAgent attribute 1672 List<PackageInfo> targetApps = allAgentPackages(); 1673 if (packageNames != null) { 1674 if (MORE_DEBUG) Slog.v(TAG, "addPackageParticipantsLocked: #" + packageNames.length); 1675 for (String packageName : packageNames) { 1676 addPackageParticipantsLockedInner(packageName, targetApps); 1677 } 1678 } else { 1679 if (MORE_DEBUG) Slog.v(TAG, "addPackageParticipantsLocked: all"); 1680 addPackageParticipantsLockedInner(null, targetApps); 1681 } 1682 } 1683 1684 private void addPackageParticipantsLockedInner(String packageName, 1685 List<PackageInfo> targetPkgs) { 1686 if (MORE_DEBUG) { 1687 Slog.v(TAG, "Examining " + packageName + " for backup agent"); 1688 } 1689 1690 for (PackageInfo pkg : targetPkgs) { 1691 if (packageName == null || pkg.packageName.equals(packageName)) { 1692 int uid = pkg.applicationInfo.uid; 1693 HashSet<String> set = mBackupParticipants.get(uid); 1694 if (set == null) { 1695 set = new HashSet<String>(); 1696 mBackupParticipants.put(uid, set); 1697 } 1698 set.add(pkg.packageName); 1699 if (MORE_DEBUG) Slog.v(TAG, "Agent found; added"); 1700 1701 // Schedule a backup for it on general principles 1702 if (MORE_DEBUG) Slog.i(TAG, "Scheduling backup for new app " + pkg.packageName); 1703 dataChangedImpl(pkg.packageName); 1704 } 1705 } 1706 } 1707 1708 // Remove the given packages' entries from our known active set. 1709 void removePackageParticipantsLocked(String[] packageNames, int oldUid) { 1710 if (packageNames == null) { 1711 Slog.w(TAG, "removePackageParticipants with null list"); 1712 return; 1713 } 1714 1715 if (MORE_DEBUG) Slog.v(TAG, "removePackageParticipantsLocked: uid=" + oldUid 1716 + " #" + packageNames.length); 1717 for (String pkg : packageNames) { 1718 // Known previous UID, so we know which package set to check 1719 HashSet<String> set = mBackupParticipants.get(oldUid); 1720 if (set != null && set.contains(pkg)) { 1721 removePackageFromSetLocked(set, pkg); 1722 if (set.isEmpty()) { 1723 if (MORE_DEBUG) Slog.v(TAG, " last one of this uid; purging set"); 1724 mBackupParticipants.remove(oldUid); 1725 } 1726 } 1727 } 1728 } 1729 1730 private void removePackageFromSetLocked(final HashSet<String> set, 1731 final String packageName) { 1732 if (set.contains(packageName)) { 1733 // Found it. Remove this one package from the bookkeeping, and 1734 // if it's the last participating app under this uid we drop the 1735 // (now-empty) set as well. 1736 // Note that we deliberately leave it 'known' in the "ever backed up" 1737 // bookkeeping so that its current-dataset data will be retrieved 1738 // if the app is subsequently reinstalled 1739 if (MORE_DEBUG) Slog.v(TAG, " removing participant " + packageName); 1740 set.remove(packageName); 1741 mPendingBackups.remove(packageName); 1742 } 1743 } 1744 1745 // Returns the set of all applications that define an android:backupAgent attribute 1746 List<PackageInfo> allAgentPackages() { 1747 // !!! TODO: cache this and regenerate only when necessary 1748 int flags = PackageManager.GET_SIGNATURES; 1749 List<PackageInfo> packages = mPackageManager.getInstalledPackages(flags); 1750 int N = packages.size(); 1751 for (int a = N-1; a >= 0; a--) { 1752 PackageInfo pkg = packages.get(a); 1753 try { 1754 ApplicationInfo app = pkg.applicationInfo; 1755 if (((app.flags&ApplicationInfo.FLAG_ALLOW_BACKUP) == 0) 1756 || app.backupAgentName == null) { 1757 packages.remove(a); 1758 } 1759 else { 1760 // we will need the shared library path, so look that up and store it here. 1761 // This is used implicitly when we pass the PackageInfo object off to 1762 // the Activity Manager to launch the app for backup/restore purposes. 1763 app = mPackageManager.getApplicationInfo(pkg.packageName, 1764 PackageManager.GET_SHARED_LIBRARY_FILES); 1765 pkg.applicationInfo.sharedLibraryFiles = app.sharedLibraryFiles; 1766 } 1767 } catch (NameNotFoundException e) { 1768 packages.remove(a); 1769 } 1770 } 1771 return packages; 1772 } 1773 1774 // Called from the backup task: record that the given app has been successfully 1775 // backed up at least once 1776 void logBackupComplete(String packageName) { 1777 if (packageName.equals(PACKAGE_MANAGER_SENTINEL)) return; 1778 1779 synchronized (mEverStoredApps) { 1780 if (!mEverStoredApps.add(packageName)) return; 1781 1782 RandomAccessFile out = null; 1783 try { 1784 out = new RandomAccessFile(mEverStored, "rws"); 1785 out.seek(out.length()); 1786 out.writeUTF(packageName); 1787 } catch (IOException e) { 1788 Slog.e(TAG, "Can't log backup of " + packageName + " to " + mEverStored); 1789 } finally { 1790 try { if (out != null) out.close(); } catch (IOException e) {} 1791 } 1792 } 1793 } 1794 1795 // Remove our awareness of having ever backed up the given package 1796 void removeEverBackedUp(String packageName) { 1797 if (DEBUG) Slog.v(TAG, "Removing backed-up knowledge of " + packageName); 1798 if (MORE_DEBUG) Slog.v(TAG, "New set:"); 1799 1800 synchronized (mEverStoredApps) { 1801 // Rewrite the file and rename to overwrite. If we reboot in the middle, 1802 // we'll recognize on initialization time that the package no longer 1803 // exists and fix it up then. 1804 File tempKnownFile = new File(mBaseStateDir, "processed.new"); 1805 RandomAccessFile known = null; 1806 try { 1807 known = new RandomAccessFile(tempKnownFile, "rws"); 1808 mEverStoredApps.remove(packageName); 1809 for (String s : mEverStoredApps) { 1810 known.writeUTF(s); 1811 if (MORE_DEBUG) Slog.v(TAG, " " + s); 1812 } 1813 known.close(); 1814 known = null; 1815 if (!tempKnownFile.renameTo(mEverStored)) { 1816 throw new IOException("Can't rename " + tempKnownFile + " to " + mEverStored); 1817 } 1818 } catch (IOException e) { 1819 // Bad: we couldn't create the new copy. For safety's sake we 1820 // abandon the whole process and remove all what's-backed-up 1821 // state entirely, meaning we'll force a backup pass for every 1822 // participant on the next boot or [re]install. 1823 Slog.w(TAG, "Error rewriting " + mEverStored, e); 1824 mEverStoredApps.clear(); 1825 tempKnownFile.delete(); 1826 mEverStored.delete(); 1827 } finally { 1828 try { if (known != null) known.close(); } catch (IOException e) {} 1829 } 1830 } 1831 } 1832 1833 // Persistently record the current and ancestral backup tokens as well 1834 // as the set of packages with data [supposedly] available in the 1835 // ancestral dataset. 1836 void writeRestoreTokens() { 1837 try { 1838 RandomAccessFile af = new RandomAccessFile(mTokenFile, "rwd"); 1839 1840 // First, the version number of this record, for futureproofing 1841 af.writeInt(CURRENT_ANCESTRAL_RECORD_VERSION); 1842 1843 // Write the ancestral and current tokens 1844 af.writeLong(mAncestralToken); 1845 af.writeLong(mCurrentToken); 1846 1847 // Now write the set of ancestral packages 1848 if (mAncestralPackages == null) { 1849 af.writeInt(-1); 1850 } else { 1851 af.writeInt(mAncestralPackages.size()); 1852 if (DEBUG) Slog.v(TAG, "Ancestral packages: " + mAncestralPackages.size()); 1853 for (String pkgName : mAncestralPackages) { 1854 af.writeUTF(pkgName); 1855 if (MORE_DEBUG) Slog.v(TAG, " " + pkgName); 1856 } 1857 } 1858 af.close(); 1859 } catch (IOException e) { 1860 Slog.w(TAG, "Unable to write token file:", e); 1861 } 1862 } 1863 1864 // Return the given transport 1865 private IBackupTransport getTransport(String transportName) { 1866 synchronized (mTransports) { 1867 IBackupTransport transport = mTransports.get(transportName); 1868 if (transport == null) { 1869 Slog.w(TAG, "Requested unavailable transport: " + transportName); 1870 } 1871 return transport; 1872 } 1873 } 1874 1875 // fire off a backup agent, blocking until it attaches or times out 1876 IBackupAgent bindToAgentSynchronous(ApplicationInfo app, int mode) { 1877 IBackupAgent agent = null; 1878 synchronized(mAgentConnectLock) { 1879 mConnecting = true; 1880 mConnectedAgent = null; 1881 try { 1882 if (mActivityManager.bindBackupAgent(app, mode)) { 1883 Slog.d(TAG, "awaiting agent for " + app); 1884 1885 // success; wait for the agent to arrive 1886 // only wait 10 seconds for the bind to happen 1887 long timeoutMark = System.currentTimeMillis() + TIMEOUT_INTERVAL; 1888 while (mConnecting && mConnectedAgent == null 1889 && (System.currentTimeMillis() < timeoutMark)) { 1890 try { 1891 mAgentConnectLock.wait(5000); 1892 } catch (InterruptedException e) { 1893 // just bail 1894 if (DEBUG) Slog.w(TAG, "Interrupted: " + e); 1895 mActivityManager.clearPendingBackup(); 1896 return null; 1897 } 1898 } 1899 1900 // if we timed out with no connect, abort and move on 1901 if (mConnecting == true) { 1902 Slog.w(TAG, "Timeout waiting for agent " + app); 1903 mActivityManager.clearPendingBackup(); 1904 return null; 1905 } 1906 if (DEBUG) Slog.i(TAG, "got agent " + mConnectedAgent); 1907 agent = mConnectedAgent; 1908 } 1909 } catch (RemoteException e) { 1910 // can't happen - ActivityManager is local 1911 } 1912 } 1913 return agent; 1914 } 1915 1916 // clear an application's data, blocking until the operation completes or times out 1917 void clearApplicationDataSynchronous(String packageName) { 1918 // Don't wipe packages marked allowClearUserData=false 1919 try { 1920 PackageInfo info = mPackageManager.getPackageInfo(packageName, 0); 1921 if ((info.applicationInfo.flags & ApplicationInfo.FLAG_ALLOW_CLEAR_USER_DATA) == 0) { 1922 if (MORE_DEBUG) Slog.i(TAG, "allowClearUserData=false so not wiping " 1923 + packageName); 1924 return; 1925 } 1926 } catch (NameNotFoundException e) { 1927 Slog.w(TAG, "Tried to clear data for " + packageName + " but not found"); 1928 return; 1929 } 1930 1931 ClearDataObserver observer = new ClearDataObserver(); 1932 1933 synchronized(mClearDataLock) { 1934 mClearingData = true; 1935 try { 1936 mActivityManager.clearApplicationUserData(packageName, observer, 0); 1937 } catch (RemoteException e) { 1938 // can't happen because the activity manager is in this process 1939 } 1940 1941 // only wait 10 seconds for the clear data to happen 1942 long timeoutMark = System.currentTimeMillis() + TIMEOUT_INTERVAL; 1943 while (mClearingData && (System.currentTimeMillis() < timeoutMark)) { 1944 try { 1945 mClearDataLock.wait(5000); 1946 } catch (InterruptedException e) { 1947 // won't happen, but still. 1948 mClearingData = false; 1949 } 1950 } 1951 } 1952 } 1953 1954 class ClearDataObserver extends IPackageDataObserver.Stub { 1955 public void onRemoveCompleted(String packageName, boolean succeeded) { 1956 synchronized(mClearDataLock) { 1957 mClearingData = false; 1958 mClearDataLock.notifyAll(); 1959 } 1960 } 1961 } 1962 1963 // Get the restore-set token for the best-available restore set for this package: 1964 // the active set if possible, else the ancestral one. Returns zero if none available. 1965 long getAvailableRestoreToken(String packageName) { 1966 long token = mAncestralToken; 1967 synchronized (mQueueLock) { 1968 if (mEverStoredApps.contains(packageName)) { 1969 token = mCurrentToken; 1970 } 1971 } 1972 return token; 1973 } 1974 1975 // ----- 1976 // Interface and methods used by the asynchronous-with-timeout backup/restore operations 1977 1978 interface BackupRestoreTask { 1979 // Execute one tick of whatever state machine the task implements 1980 void execute(); 1981 1982 // An operation that wanted a callback has completed 1983 void operationComplete(); 1984 1985 // An operation that wanted a callback has timed out 1986 void handleTimeout(); 1987 } 1988 1989 void prepareOperationTimeout(int token, long interval, BackupRestoreTask callback) { 1990 if (MORE_DEBUG) Slog.v(TAG, "starting timeout: token=" + Integer.toHexString(token) 1991 + " interval=" + interval); 1992 synchronized (mCurrentOpLock) { 1993 mCurrentOperations.put(token, new Operation(OP_PENDING, callback)); 1994 1995 Message msg = mBackupHandler.obtainMessage(MSG_TIMEOUT, token, 0, callback); 1996 mBackupHandler.sendMessageDelayed(msg, interval); 1997 } 1998 } 1999 2000 // synchronous waiter case 2001 boolean waitUntilOperationComplete(int token) { 2002 if (MORE_DEBUG) Slog.i(TAG, "Blocking until operation complete for " 2003 + Integer.toHexString(token)); 2004 int finalState = OP_PENDING; 2005 Operation op = null; 2006 synchronized (mCurrentOpLock) { 2007 while (true) { 2008 op = mCurrentOperations.get(token); 2009 if (op == null) { 2010 // mysterious disappearance: treat as success with no callback 2011 break; 2012 } else { 2013 if (op.state == OP_PENDING) { 2014 try { 2015 mCurrentOpLock.wait(); 2016 } catch (InterruptedException e) {} 2017 // When the wait is notified we loop around and recheck the current state 2018 } else { 2019 // No longer pending; we're done 2020 finalState = op.state; 2021 break; 2022 } 2023 } 2024 } 2025 } 2026 2027 mBackupHandler.removeMessages(MSG_TIMEOUT); 2028 if (MORE_DEBUG) Slog.v(TAG, "operation " + Integer.toHexString(token) 2029 + " complete: finalState=" + finalState); 2030 return finalState == OP_ACKNOWLEDGED; 2031 } 2032 2033 void handleTimeout(int token, Object obj) { 2034 // Notify any synchronous waiters 2035 Operation op = null; 2036 synchronized (mCurrentOpLock) { 2037 op = mCurrentOperations.get(token); 2038 if (MORE_DEBUG) { 2039 if (op == null) Slog.w(TAG, "Timeout of token " + Integer.toHexString(token) 2040 + " but no op found"); 2041 } 2042 int state = (op != null) ? op.state : OP_TIMEOUT; 2043 if (state == OP_PENDING) { 2044 if (DEBUG) Slog.v(TAG, "TIMEOUT: token=" + Integer.toHexString(token)); 2045 op.state = OP_TIMEOUT; 2046 mCurrentOperations.put(token, op); 2047 } 2048 mCurrentOpLock.notifyAll(); 2049 } 2050 2051 // If there's a TimeoutHandler for this event, call it 2052 if (op != null && op.callback != null) { 2053 op.callback.handleTimeout(); 2054 } 2055 } 2056 2057 // ----- Back up a set of applications via a worker thread ----- 2058 2059 enum BackupState { 2060 INITIAL, 2061 RUNNING_QUEUE, 2062 FINAL 2063 } 2064 2065 class PerformBackupTask implements BackupRestoreTask { 2066 private static final String TAG = "PerformBackupTask"; 2067 2068 IBackupTransport mTransport; 2069 ArrayList<BackupRequest> mQueue; 2070 ArrayList<BackupRequest> mOriginalQueue; 2071 File mStateDir; 2072 File mJournal; 2073 BackupState mCurrentState; 2074 2075 // carried information about the current in-flight operation 2076 IBackupAgent mAgentBinder; 2077 PackageInfo mCurrentPackage; 2078 File mSavedStateName; 2079 File mBackupDataName; 2080 File mNewStateName; 2081 ParcelFileDescriptor mSavedState; 2082 ParcelFileDescriptor mBackupData; 2083 ParcelFileDescriptor mNewState; 2084 int mStatus; 2085 boolean mFinished; 2086 2087 public PerformBackupTask(IBackupTransport transport, String dirName, 2088 ArrayList<BackupRequest> queue, File journal) { 2089 mTransport = transport; 2090 mOriginalQueue = queue; 2091 mJournal = journal; 2092 2093 mStateDir = new File(mBaseStateDir, dirName); 2094 2095 mCurrentState = BackupState.INITIAL; 2096 mFinished = false; 2097 2098 addBackupTrace("STATE => INITIAL"); 2099 } 2100 2101 // Main entry point: perform one chunk of work, updating the state as appropriate 2102 // and reposting the next chunk to the primary backup handler thread. 2103 @Override 2104 public void execute() { 2105 switch (mCurrentState) { 2106 case INITIAL: 2107 beginBackup(); 2108 break; 2109 2110 case RUNNING_QUEUE: 2111 invokeNextAgent(); 2112 break; 2113 2114 case FINAL: 2115 if (!mFinished) finalizeBackup(); 2116 else { 2117 Slog.e(TAG, "Duplicate finish"); 2118 } 2119 mFinished = true; 2120 break; 2121 } 2122 } 2123 2124 // We're starting a backup pass. Initialize the transport and send 2125 // the PM metadata blob if we haven't already. 2126 void beginBackup() { 2127 if (DEBUG_BACKUP_TRACE) { 2128 clearBackupTrace(); 2129 StringBuilder b = new StringBuilder(256); 2130 b.append("beginBackup: ["); 2131 for (BackupRequest req : mOriginalQueue) { 2132 b.append(' '); 2133 b.append(req.packageName); 2134 } 2135 b.append(" ]"); 2136 addBackupTrace(b.toString()); 2137 } 2138 2139 mAgentBinder = null; 2140 mStatus = BackupTransport.TRANSPORT_OK; 2141 2142 // Sanity check: if the queue is empty we have no work to do. 2143 if (mOriginalQueue.isEmpty()) { 2144 Slog.w(TAG, "Backup begun with an empty queue - nothing to do."); 2145 addBackupTrace("queue empty at begin"); 2146 executeNextState(BackupState.FINAL); 2147 return; 2148 } 2149 2150 // We need to retain the original queue contents in case of transport 2151 // failure, but we want a working copy that we can manipulate along 2152 // the way. 2153 mQueue = (ArrayList<BackupRequest>) mOriginalQueue.clone(); 2154 2155 if (DEBUG) Slog.v(TAG, "Beginning backup of " + mQueue.size() + " targets"); 2156 2157 File pmState = new File(mStateDir, PACKAGE_MANAGER_SENTINEL); 2158 try { 2159 final String transportName = mTransport.transportDirName(); 2160 EventLog.writeEvent(EventLogTags.BACKUP_START, transportName); 2161 2162 // If we haven't stored package manager metadata yet, we must init the transport. 2163 if (mStatus == BackupTransport.TRANSPORT_OK && pmState.length() <= 0) { 2164 Slog.i(TAG, "Initializing (wiping) backup state and transport storage"); 2165 addBackupTrace("initializing transport " + transportName); 2166 resetBackupState(mStateDir); // Just to make sure. 2167 mStatus = mTransport.initializeDevice(); 2168 2169 addBackupTrace("transport.initializeDevice() == " + mStatus); 2170 if (mStatus == BackupTransport.TRANSPORT_OK) { 2171 EventLog.writeEvent(EventLogTags.BACKUP_INITIALIZE); 2172 } else { 2173 EventLog.writeEvent(EventLogTags.BACKUP_TRANSPORT_FAILURE, "(initialize)"); 2174 Slog.e(TAG, "Transport error in initializeDevice()"); 2175 } 2176 } 2177 2178 // The package manager doesn't have a proper <application> etc, but since 2179 // it's running here in the system process we can just set up its agent 2180 // directly and use a synthetic BackupRequest. We always run this pass 2181 // because it's cheap and this way we guarantee that we don't get out of 2182 // step even if we're selecting among various transports at run time. 2183 if (mStatus == BackupTransport.TRANSPORT_OK) { 2184 PackageManagerBackupAgent pmAgent = new PackageManagerBackupAgent( 2185 mPackageManager); 2186 mStatus = invokeAgentForBackup(PACKAGE_MANAGER_SENTINEL, 2187 IBackupAgent.Stub.asInterface(pmAgent.onBind()), mTransport); 2188 addBackupTrace("PMBA invoke: " + mStatus); 2189 } 2190 2191 if (mStatus == BackupTransport.TRANSPORT_NOT_INITIALIZED) { 2192 // The backend reports that our dataset has been wiped. Note this in 2193 // the event log; the no-success code below will reset the backup 2194 // state as well. 2195 EventLog.writeEvent(EventLogTags.BACKUP_RESET, mTransport.transportDirName()); 2196 } 2197 } catch (Exception e) { 2198 Slog.e(TAG, "Error in backup thread", e); 2199 addBackupTrace("Exception in backup thread: " + e); 2200 mStatus = BackupTransport.TRANSPORT_ERROR; 2201 } finally { 2202 // If we've succeeded so far, invokeAgentForBackup() will have run the PM 2203 // metadata and its completion/timeout callback will continue the state 2204 // machine chain. If it failed that won't happen; we handle that now. 2205 addBackupTrace("exiting prelim: " + mStatus); 2206 if (mStatus != BackupTransport.TRANSPORT_OK) { 2207 // if things went wrong at this point, we need to 2208 // restage everything and try again later. 2209 resetBackupState(mStateDir); // Just to make sure. 2210 executeNextState(BackupState.FINAL); 2211 } 2212 } 2213 } 2214 2215 // Transport has been initialized and the PM metadata submitted successfully 2216 // if that was warranted. Now we process the single next thing in the queue. 2217 void invokeNextAgent() { 2218 mStatus = BackupTransport.TRANSPORT_OK; 2219 addBackupTrace("invoke q=" + mQueue.size()); 2220 2221 // Sanity check that we have work to do. If not, skip to the end where 2222 // we reestablish the wakelock invariants etc. 2223 if (mQueue.isEmpty()) { 2224 if (DEBUG) Slog.i(TAG, "queue now empty"); 2225 executeNextState(BackupState.FINAL); 2226 return; 2227 } 2228 2229 // pop the entry we're going to process on this step 2230 BackupRequest request = mQueue.get(0); 2231 mQueue.remove(0); 2232 2233 Slog.d(TAG, "starting agent for backup of " + request); 2234 addBackupTrace("launch agent for " + request.packageName); 2235 2236 // Verify that the requested app exists; it might be something that 2237 // requested a backup but was then uninstalled. The request was 2238 // journalled and rather than tamper with the journal it's safer 2239 // to sanity-check here. This also gives us the classname of the 2240 // package's backup agent. 2241 try { 2242 mCurrentPackage = mPackageManager.getPackageInfo(request.packageName, 2243 PackageManager.GET_SIGNATURES); 2244 if (mCurrentPackage.applicationInfo.backupAgentName == null) { 2245 // The manifest has changed but we had a stale backup request pending. 2246 // This won't happen again because the app won't be requesting further 2247 // backups. 2248 Slog.i(TAG, "Package " + request.packageName 2249 + " no longer supports backup; skipping"); 2250 addBackupTrace("skipping - no agent, completion is noop"); 2251 executeNextState(BackupState.RUNNING_QUEUE); 2252 return; 2253 } 2254 2255 if ((mCurrentPackage.applicationInfo.flags & ApplicationInfo.FLAG_STOPPED) != 0) { 2256 // The app has been force-stopped or cleared or just installed, 2257 // and not yet launched out of that state, so just as it won't 2258 // receive broadcasts, we won't run it for backup. 2259 addBackupTrace("skipping - stopped"); 2260 executeNextState(BackupState.RUNNING_QUEUE); 2261 return; 2262 } 2263 2264 IBackupAgent agent = null; 2265 try { 2266 mWakelock.setWorkSource(new WorkSource(mCurrentPackage.applicationInfo.uid)); 2267 agent = bindToAgentSynchronous(mCurrentPackage.applicationInfo, 2268 IApplicationThread.BACKUP_MODE_INCREMENTAL); 2269 addBackupTrace("agent bound; a? = " + (agent != null)); 2270 if (agent != null) { 2271 mAgentBinder = agent; 2272 mStatus = invokeAgentForBackup(request.packageName, agent, mTransport); 2273 // at this point we'll either get a completion callback from the 2274 // agent, or a timeout message on the main handler. either way, we're 2275 // done here as long as we're successful so far. 2276 } else { 2277 // Timeout waiting for the agent 2278 mStatus = BackupTransport.AGENT_ERROR; 2279 } 2280 } catch (SecurityException ex) { 2281 // Try for the next one. 2282 Slog.d(TAG, "error in bind/backup", ex); 2283 mStatus = BackupTransport.AGENT_ERROR; 2284 addBackupTrace("agent SE"); 2285 } 2286 } catch (NameNotFoundException e) { 2287 Slog.d(TAG, "Package does not exist; skipping"); 2288 addBackupTrace("no such package"); 2289 mStatus = BackupTransport.AGENT_UNKNOWN; 2290 } finally { 2291 mWakelock.setWorkSource(null); 2292 2293 // If there was an agent error, no timeout/completion handling will occur. 2294 // That means we need to direct to the next state ourselves. 2295 if (mStatus != BackupTransport.TRANSPORT_OK) { 2296 BackupState nextState = BackupState.RUNNING_QUEUE; 2297 mAgentBinder = null; 2298 2299 // An agent-level failure means we reenqueue this one agent for 2300 // a later retry, but otherwise proceed normally. 2301 if (mStatus == BackupTransport.AGENT_ERROR) { 2302 if (MORE_DEBUG) Slog.i(TAG, "Agent failure for " + request.packageName 2303 + " - restaging"); 2304 dataChangedImpl(request.packageName); 2305 mStatus = BackupTransport.TRANSPORT_OK; 2306 if (mQueue.isEmpty()) nextState = BackupState.FINAL; 2307 } else if (mStatus == BackupTransport.AGENT_UNKNOWN) { 2308 // Failed lookup of the app, so we couldn't bring up an agent, but 2309 // we're otherwise fine. Just drop it and go on to the next as usual. 2310 mStatus = BackupTransport.TRANSPORT_OK; 2311 } else { 2312 // Transport-level failure means we reenqueue everything 2313 revertAndEndBackup(); 2314 nextState = BackupState.FINAL; 2315 } 2316 2317 executeNextState(nextState); 2318 } else { 2319 // success case 2320 addBackupTrace("expecting completion/timeout callback"); 2321 } 2322 } 2323 } 2324 2325 void finalizeBackup() { 2326 addBackupTrace("finishing"); 2327 2328 // Either backup was successful, in which case we of course do not need 2329 // this pass's journal any more; or it failed, in which case we just 2330 // re-enqueued all of these packages in the current active journal. 2331 // Either way, we no longer need this pass's journal. 2332 if (mJournal != null && !mJournal.delete()) { 2333 Slog.e(TAG, "Unable to remove backup journal file " + mJournal); 2334 } 2335 2336 // If everything actually went through and this is the first time we've 2337 // done a backup, we can now record what the current backup dataset token 2338 // is. 2339 if ((mCurrentToken == 0) && (mStatus == BackupTransport.TRANSPORT_OK)) { 2340 addBackupTrace("success; recording token"); 2341 try { 2342 mCurrentToken = mTransport.getCurrentRestoreSet(); 2343 writeRestoreTokens(); 2344 } catch (RemoteException e) { 2345 // nothing for it at this point, unfortunately, but this will be 2346 // recorded the next time we fully succeed. 2347 addBackupTrace("transport threw returning token"); 2348 } 2349 } 2350 2351 // Set up the next backup pass - at this point we can set mBackupRunning 2352 // to false to allow another pass to fire, because we're done with the 2353 // state machine sequence and the wakelock is refcounted. 2354 synchronized (mQueueLock) { 2355 mBackupRunning = false; 2356 if (mStatus == BackupTransport.TRANSPORT_NOT_INITIALIZED) { 2357 // Make sure we back up everything and perform the one-time init 2358 clearMetadata(); 2359 if (DEBUG) Slog.d(TAG, "Server requires init; rerunning"); 2360 addBackupTrace("init required; rerunning"); 2361 backupNow(); 2362 } 2363 } 2364 2365 // Only once we're entirely finished do we release the wakelock 2366 clearBackupTrace(); 2367 Slog.i(BackupManagerService.TAG, "Backup pass finished."); 2368 mWakelock.release(); 2369 } 2370 2371 // Remove the PM metadata state. This will generate an init on the next pass. 2372 void clearMetadata() { 2373 final File pmState = new File(mStateDir, PACKAGE_MANAGER_SENTINEL); 2374 if (pmState.exists()) pmState.delete(); 2375 } 2376 2377 // Invoke an agent's doBackup() and start a timeout message spinning on the main 2378 // handler in case it doesn't get back to us. 2379 int invokeAgentForBackup(String packageName, IBackupAgent agent, 2380 IBackupTransport transport) { 2381 if (DEBUG) Slog.d(TAG, "invokeAgentForBackup on " + packageName); 2382 addBackupTrace("invoking " + packageName); 2383 2384 mSavedStateName = new File(mStateDir, packageName); 2385 mBackupDataName = new File(mDataDir, packageName + ".data"); 2386 mNewStateName = new File(mStateDir, packageName + ".new"); 2387 if (MORE_DEBUG) Slog.d(TAG, "data file: " + mBackupDataName); 2388 2389 mSavedState = null; 2390 mBackupData = null; 2391 mNewState = null; 2392 2393 final int token = generateToken(); 2394 try { 2395 // Look up the package info & signatures. This is first so that if it 2396 // throws an exception, there's no file setup yet that would need to 2397 // be unraveled. 2398 if (packageName.equals(PACKAGE_MANAGER_SENTINEL)) { 2399 // The metadata 'package' is synthetic; construct one and make 2400 // sure our global state is pointed at it 2401 mCurrentPackage = new PackageInfo(); 2402 mCurrentPackage.packageName = packageName; 2403 } 2404 2405 // In a full backup, we pass a null ParcelFileDescriptor as 2406 // the saved-state "file". This is by definition an incremental, 2407 // so we build a saved state file to pass. 2408 mSavedState = ParcelFileDescriptor.open(mSavedStateName, 2409 ParcelFileDescriptor.MODE_READ_ONLY | 2410 ParcelFileDescriptor.MODE_CREATE); // Make an empty file if necessary 2411 2412 mBackupData = ParcelFileDescriptor.open(mBackupDataName, 2413 ParcelFileDescriptor.MODE_READ_WRITE | 2414 ParcelFileDescriptor.MODE_CREATE | 2415 ParcelFileDescriptor.MODE_TRUNCATE); 2416 2417 if (!SELinux.restorecon(mBackupDataName)) { 2418 Slog.e(TAG, "SELinux restorecon failed on " + mBackupDataName); 2419 } 2420 2421 mNewState = ParcelFileDescriptor.open(mNewStateName, 2422 ParcelFileDescriptor.MODE_READ_WRITE | 2423 ParcelFileDescriptor.MODE_CREATE | 2424 ParcelFileDescriptor.MODE_TRUNCATE); 2425 2426 // Initiate the target's backup pass 2427 addBackupTrace("setting timeout"); 2428 prepareOperationTimeout(token, TIMEOUT_BACKUP_INTERVAL, this); 2429 addBackupTrace("calling agent doBackup()"); 2430 agent.doBackup(mSavedState, mBackupData, mNewState, token, mBackupManagerBinder); 2431 } catch (Exception e) { 2432 Slog.e(TAG, "Error invoking for backup on " + packageName); 2433 addBackupTrace("exception: " + e); 2434 EventLog.writeEvent(EventLogTags.BACKUP_AGENT_FAILURE, packageName, 2435 e.toString()); 2436 agentErrorCleanup(); 2437 return BackupTransport.AGENT_ERROR; 2438 } 2439 2440 // At this point the agent is off and running. The next thing to happen will 2441 // either be a callback from the agent, at which point we'll process its data 2442 // for transport, or a timeout. Either way the next phase will happen in 2443 // response to the TimeoutHandler interface callbacks. 2444 addBackupTrace("invoke success"); 2445 return BackupTransport.TRANSPORT_OK; 2446 } 2447 2448 public void failAgent(IBackupAgent agent, String message) { 2449 try { 2450 agent.fail(message); 2451 } catch (Exception e) { 2452 Slog.w(TAG, "Error conveying failure to " + mCurrentPackage.packageName); 2453 } 2454 } 2455 2456 @Override 2457 public void operationComplete() { 2458 // Okay, the agent successfully reported back to us! 2459 final String pkgName = mCurrentPackage.packageName; 2460 final long filepos = mBackupDataName.length(); 2461 FileDescriptor fd = mBackupData.getFileDescriptor(); 2462 try { 2463 // If it's a 3rd party app, see whether they wrote any protected keys 2464 // and complain mightily if they are attempting shenanigans. 2465 if (mCurrentPackage.applicationInfo != null && 2466 (mCurrentPackage.applicationInfo.flags&ApplicationInfo.FLAG_SYSTEM) == 0) { 2467 ParcelFileDescriptor readFd = ParcelFileDescriptor.open(mBackupDataName, 2468 ParcelFileDescriptor.MODE_READ_ONLY); 2469 BackupDataInput in = new BackupDataInput(readFd.getFileDescriptor()); 2470 try { 2471 while (in.readNextHeader()) { 2472 final String key = in.getKey(); 2473 if (key != null && key.charAt(0) >= 0xff00) { 2474 // Not okay: crash them and bail. 2475 failAgent(mAgentBinder, "Illegal backup key: " + key); 2476 addBackupTrace("illegal key " + key + " from " + pkgName); 2477 EventLog.writeEvent(EventLogTags.BACKUP_AGENT_FAILURE, pkgName, 2478 "bad key"); 2479 mBackupHandler.removeMessages(MSG_TIMEOUT); 2480 agentErrorCleanup(); 2481 // agentErrorCleanup() implicitly executes next state properly 2482 return; 2483 } 2484 in.skipEntityData(); 2485 } 2486 } finally { 2487 if (readFd != null) { 2488 readFd.close(); 2489 } 2490 } 2491 } 2492 2493 // Piggyback the widget state payload, if any 2494 BackupDataOutput out = new BackupDataOutput(fd); 2495 byte[] widgetState = AppWidgetBackupBridge.getWidgetState(pkgName, 2496 UserHandle.USER_OWNER); 2497 if (widgetState != null) { 2498 out.writeEntityHeader(KEY_WIDGET_STATE, widgetState.length); 2499 out.writeEntityData(widgetState, widgetState.length); 2500 } else { 2501 // No widget state for this app, but push a 'delete' operation for it 2502 // in case they're trying to play games with the payload. 2503 out.writeEntityHeader(KEY_WIDGET_STATE, -1); 2504 } 2505 } catch (IOException e) { 2506 // Hard disk error; recovery/failure policy TBD. For now roll back, 2507 // but we may want to consider this a transport-level failure (i.e. 2508 // we're in such a bad state that we can't contemplate doing backup 2509 // operations any more during this pass). 2510 Slog.w(TAG, "Unable to save widget state for " + pkgName); 2511 try { 2512 Os.ftruncate(fd, filepos); 2513 } catch (ErrnoException ee) { 2514 Slog.w(TAG, "Unable to roll back!"); 2515 } 2516 } 2517 2518 // Spin the data off to the transport and proceed with the next stage. 2519 if (MORE_DEBUG) Slog.v(TAG, "operationComplete(): sending data to transport for " 2520 + pkgName); 2521 mBackupHandler.removeMessages(MSG_TIMEOUT); 2522 clearAgentState(); 2523 addBackupTrace("operation complete"); 2524 2525 ParcelFileDescriptor backupData = null; 2526 mStatus = BackupTransport.TRANSPORT_OK; 2527 try { 2528 int size = (int) mBackupDataName.length(); 2529 if (size > 0) { 2530 if (mStatus == BackupTransport.TRANSPORT_OK) { 2531 backupData = ParcelFileDescriptor.open(mBackupDataName, 2532 ParcelFileDescriptor.MODE_READ_ONLY); 2533 addBackupTrace("sending data to transport"); 2534 mStatus = mTransport.performBackup(mCurrentPackage, backupData); 2535 } 2536 2537 // TODO - We call finishBackup() for each application backed up, because 2538 // we need to know now whether it succeeded or failed. Instead, we should 2539 // hold off on finishBackup() until the end, which implies holding off on 2540 // renaming *all* the output state files (see below) until that happens. 2541 2542 addBackupTrace("data delivered: " + mStatus); 2543 if (mStatus == BackupTransport.TRANSPORT_OK) { 2544 addBackupTrace("finishing op on transport"); 2545 mStatus = mTransport.finishBackup(); 2546 addBackupTrace("finished: " + mStatus); 2547 } 2548 } else { 2549 if (DEBUG) Slog.i(TAG, "no backup data written; not calling transport"); 2550 addBackupTrace("no data to send"); 2551 } 2552 2553 // After successful transport, delete the now-stale data 2554 // and juggle the files so that next time we supply the agent 2555 // with the new state file it just created. 2556 if (mStatus == BackupTransport.TRANSPORT_OK) { 2557 mBackupDataName.delete(); 2558 mNewStateName.renameTo(mSavedStateName); 2559 EventLog.writeEvent(EventLogTags.BACKUP_PACKAGE, pkgName, size); 2560 logBackupComplete(pkgName); 2561 } else { 2562 EventLog.writeEvent(EventLogTags.BACKUP_TRANSPORT_FAILURE, pkgName); 2563 } 2564 } catch (Exception e) { 2565 Slog.e(TAG, "Transport error backing up " + pkgName, e); 2566 EventLog.writeEvent(EventLogTags.BACKUP_TRANSPORT_FAILURE, pkgName); 2567 mStatus = BackupTransport.TRANSPORT_ERROR; 2568 } finally { 2569 try { if (backupData != null) backupData.close(); } catch (IOException e) {} 2570 } 2571 2572 // If we encountered an error here it's a transport-level failure. That 2573 // means we need to halt everything and reschedule everything for next time. 2574 final BackupState nextState; 2575 if (mStatus != BackupTransport.TRANSPORT_OK) { 2576 revertAndEndBackup(); 2577 nextState = BackupState.FINAL; 2578 } else { 2579 // Success! Proceed with the next app if any, otherwise we're done. 2580 nextState = (mQueue.isEmpty()) ? BackupState.FINAL : BackupState.RUNNING_QUEUE; 2581 } 2582 2583 executeNextState(nextState); 2584 } 2585 2586 @Override 2587 public void handleTimeout() { 2588 // Whoops, the current agent timed out running doBackup(). Tidy up and restage 2589 // it for the next time we run a backup pass. 2590 // !!! TODO: keep track of failure counts per agent, and blacklist those which 2591 // fail repeatedly (i.e. have proved themselves to be buggy). 2592 Slog.e(TAG, "Timeout backing up " + mCurrentPackage.packageName); 2593 EventLog.writeEvent(EventLogTags.BACKUP_AGENT_FAILURE, mCurrentPackage.packageName, 2594 "timeout"); 2595 addBackupTrace("timeout of " + mCurrentPackage.packageName); 2596 agentErrorCleanup(); 2597 dataChangedImpl(mCurrentPackage.packageName); 2598 } 2599 2600 void revertAndEndBackup() { 2601 if (MORE_DEBUG) Slog.i(TAG, "Reverting backup queue - restaging everything"); 2602 addBackupTrace("transport error; reverting"); 2603 for (BackupRequest request : mOriginalQueue) { 2604 dataChangedImpl(request.packageName); 2605 } 2606 // We also want to reset the backup schedule based on whatever 2607 // the transport suggests by way of retry/backoff time. 2608 restartBackupAlarm(); 2609 } 2610 2611 void agentErrorCleanup() { 2612 mBackupDataName.delete(); 2613 mNewStateName.delete(); 2614 clearAgentState(); 2615 2616 executeNextState(mQueue.isEmpty() ? BackupState.FINAL : BackupState.RUNNING_QUEUE); 2617 } 2618 2619 // Cleanup common to both success and failure cases 2620 void clearAgentState() { 2621 try { if (mSavedState != null) mSavedState.close(); } catch (IOException e) {} 2622 try { if (mBackupData != null) mBackupData.close(); } catch (IOException e) {} 2623 try { if (mNewState != null) mNewState.close(); } catch (IOException e) {} 2624 mSavedState = mBackupData = mNewState = null; 2625 synchronized (mCurrentOpLock) { 2626 mCurrentOperations.clear(); 2627 } 2628 2629 // If this was a pseudopackage there's no associated Activity Manager state 2630 if (mCurrentPackage.applicationInfo != null) { 2631 addBackupTrace("unbinding " + mCurrentPackage.packageName); 2632 try { // unbind even on timeout, just in case 2633 mActivityManager.unbindBackupAgent(mCurrentPackage.applicationInfo); 2634 } catch (RemoteException e) { /* can't happen; activity manager is local */ } 2635 } 2636 } 2637 2638 void restartBackupAlarm() { 2639 addBackupTrace("setting backup trigger"); 2640 synchronized (mQueueLock) { 2641 try { 2642 startBackupAlarmsLocked(mTransport.requestBackupTime()); 2643 } catch (RemoteException e) { /* cannot happen */ } 2644 } 2645 } 2646 2647 void executeNextState(BackupState nextState) { 2648 if (MORE_DEBUG) Slog.i(TAG, " => executing next step on " 2649 + this + " nextState=" + nextState); 2650 addBackupTrace("executeNextState => " + nextState); 2651 mCurrentState = nextState; 2652 Message msg = mBackupHandler.obtainMessage(MSG_BACKUP_RESTORE_STEP, this); 2653 mBackupHandler.sendMessage(msg); 2654 } 2655 } 2656 2657 2658 // ----- Full backup/restore to a file/socket ----- 2659 2660 class FullBackupObbConnection implements ServiceConnection { 2661 volatile IObbBackupService mService; 2662 2663 FullBackupObbConnection() { 2664 mService = null; 2665 } 2666 2667 public void establish() { 2668 if (DEBUG) Slog.i(TAG, "Initiating bind of OBB service on " + this); 2669 Intent obbIntent = new Intent().setComponent(new ComponentName( 2670 "com.android.sharedstoragebackup", 2671 "com.android.sharedstoragebackup.ObbBackupService")); 2672 BackupManagerService.this.mContext.bindService( 2673 obbIntent, this, Context.BIND_AUTO_CREATE); 2674 } 2675 2676 public void tearDown() { 2677 BackupManagerService.this.mContext.unbindService(this); 2678 } 2679 2680 public boolean backupObbs(PackageInfo pkg, OutputStream out) { 2681 boolean success = false; 2682 waitForConnection(); 2683 2684 ParcelFileDescriptor[] pipes = null; 2685 try { 2686 pipes = ParcelFileDescriptor.createPipe(); 2687 int token = generateToken(); 2688 prepareOperationTimeout(token, TIMEOUT_FULL_BACKUP_INTERVAL, null); 2689 mService.backupObbs(pkg.packageName, pipes[1], token, mBackupManagerBinder); 2690 routeSocketDataToOutput(pipes[0], out); 2691 success = waitUntilOperationComplete(token); 2692 } catch (Exception e) { 2693 Slog.w(TAG, "Unable to back up OBBs for " + pkg, e); 2694 } finally { 2695 try { 2696 out.flush(); 2697 if (pipes != null) { 2698 if (pipes[0] != null) pipes[0].close(); 2699 if (pipes[1] != null) pipes[1].close(); 2700 } 2701 } catch (IOException e) { 2702 Slog.w(TAG, "I/O error closing down OBB backup", e); 2703 } 2704 } 2705 return success; 2706 } 2707 2708 public void restoreObbFile(String pkgName, ParcelFileDescriptor data, 2709 long fileSize, int type, String path, long mode, long mtime, 2710 int token, IBackupManager callbackBinder) { 2711 waitForConnection(); 2712 2713 try { 2714 mService.restoreObbFile(pkgName, data, fileSize, type, path, mode, mtime, 2715 token, callbackBinder); 2716 } catch (Exception e) { 2717 Slog.w(TAG, "Unable to restore OBBs for " + pkgName, e); 2718 } 2719 } 2720 2721 private void waitForConnection() { 2722 synchronized (this) { 2723 while (mService == null) { 2724 if (DEBUG) Slog.i(TAG, "...waiting for OBB service binding..."); 2725 try { 2726 this.wait(); 2727 } catch (InterruptedException e) { /* never interrupted */ } 2728 } 2729 if (DEBUG) Slog.i(TAG, "Connected to OBB service; continuing"); 2730 } 2731 } 2732 2733 @Override 2734 public void onServiceConnected(ComponentName name, IBinder service) { 2735 synchronized (this) { 2736 mService = IObbBackupService.Stub.asInterface(service); 2737 if (DEBUG) Slog.i(TAG, "OBB service connection " + mService 2738 + " connected on " + this); 2739 this.notifyAll(); 2740 } 2741 } 2742 2743 @Override 2744 public void onServiceDisconnected(ComponentName name) { 2745 synchronized (this) { 2746 mService = null; 2747 if (DEBUG) Slog.i(TAG, "OBB service connection disconnected on " + this); 2748 this.notifyAll(); 2749 } 2750 } 2751 2752 } 2753 2754 private void routeSocketDataToOutput(ParcelFileDescriptor inPipe, OutputStream out) 2755 throws IOException { 2756 FileInputStream raw = new FileInputStream(inPipe.getFileDescriptor()); 2757 DataInputStream in = new DataInputStream(raw); 2758 2759 byte[] buffer = new byte[32 * 1024]; 2760 int chunkTotal; 2761 while ((chunkTotal = in.readInt()) > 0) { 2762 while (chunkTotal > 0) { 2763 int toRead = (chunkTotal > buffer.length) ? buffer.length : chunkTotal; 2764 int nRead = in.read(buffer, 0, toRead); 2765 out.write(buffer, 0, nRead); 2766 chunkTotal -= nRead; 2767 } 2768 } 2769 } 2770 2771 // Core logic for performing one package's full backup, gathering the tarball from the 2772 // application and emitting it to the designated OutputStream. 2773 class FullBackupEngine { 2774 OutputStream mOutput; 2775 IFullBackupRestoreObserver mObserver; 2776 File mFilesDir; 2777 File mManifestFile; 2778 File mMetadataFile; 2779 boolean mIncludeApks; 2780 2781 class FullBackupRunner implements Runnable { 2782 PackageInfo mPackage; 2783 byte[] mWidgetData; 2784 IBackupAgent mAgent; 2785 ParcelFileDescriptor mPipe; 2786 int mToken; 2787 boolean mSendApk; 2788 boolean mWriteManifest; 2789 2790 FullBackupRunner(PackageInfo pack, IBackupAgent agent, ParcelFileDescriptor pipe, 2791 int token, boolean sendApk, boolean writeManifest, byte[] widgetData) 2792 throws IOException { 2793 mPackage = pack; 2794 mWidgetData = widgetData; 2795 mAgent = agent; 2796 mPipe = ParcelFileDescriptor.dup(pipe.getFileDescriptor()); 2797 mToken = token; 2798 mSendApk = sendApk; 2799 mWriteManifest = writeManifest; 2800 } 2801 2802 @Override 2803 public void run() { 2804 try { 2805 BackupDataOutput output = new BackupDataOutput( 2806 mPipe.getFileDescriptor()); 2807 2808 if (mWriteManifest) { 2809 final boolean writeWidgetData = mWidgetData != null; 2810 if (MORE_DEBUG) Slog.d(TAG, "Writing manifest for " + mPackage.packageName); 2811 writeAppManifest(mPackage, mManifestFile, mSendApk, writeWidgetData); 2812 FullBackup.backupToTar(mPackage.packageName, null, null, 2813 mFilesDir.getAbsolutePath(), 2814 mManifestFile.getAbsolutePath(), 2815 output); 2816 mManifestFile.delete(); 2817 2818 // We only need to write a metadata file if we have widget data to stash 2819 if (writeWidgetData) { 2820 writeMetadata(mPackage, mMetadataFile, mWidgetData); 2821 FullBackup.backupToTar(mPackage.packageName, null, null, 2822 mFilesDir.getAbsolutePath(), 2823 mMetadataFile.getAbsolutePath(), 2824 output); 2825 mMetadataFile.delete(); 2826 } 2827 } 2828 2829 if (mSendApk) { 2830 writeApkToBackup(mPackage, output); 2831 } 2832 2833 if (DEBUG) Slog.d(TAG, "Calling doFullBackup() on " + mPackage.packageName); 2834 prepareOperationTimeout(mToken, TIMEOUT_FULL_BACKUP_INTERVAL, null); 2835 mAgent.doFullBackup(mPipe, mToken, mBackupManagerBinder); 2836 } catch (IOException e) { 2837 Slog.e(TAG, "Error running full backup for " + mPackage.packageName); 2838 } catch (RemoteException e) { 2839 Slog.e(TAG, "Remote agent vanished during full backup of " 2840 + mPackage.packageName); 2841 } finally { 2842 try { 2843 mPipe.close(); 2844 } catch (IOException e) {} 2845 } 2846 } 2847 } 2848 2849 FullBackupEngine(OutputStream output, String packageName, boolean alsoApks) { 2850 mOutput = output; 2851 mIncludeApks = alsoApks; 2852 mFilesDir = new File("/data/system"); 2853 mManifestFile = new File(mFilesDir, BACKUP_MANIFEST_FILENAME); 2854 mMetadataFile = new File(mFilesDir, BACKUP_METADATA_FILENAME); 2855 } 2856 2857 2858 public int backupOnePackage(PackageInfo pkg) throws RemoteException { 2859 int result = BackupTransport.TRANSPORT_OK; 2860 Slog.d(TAG, "Binding to full backup agent : " + pkg.packageName); 2861 2862 IBackupAgent agent = bindToAgentSynchronous(pkg.applicationInfo, 2863 IApplicationThread.BACKUP_MODE_FULL); 2864 if (agent != null) { 2865 ParcelFileDescriptor[] pipes = null; 2866 try { 2867 pipes = ParcelFileDescriptor.createPipe(); 2868 2869 ApplicationInfo app = pkg.applicationInfo; 2870 final boolean isSharedStorage = pkg.packageName.equals(SHARED_BACKUP_AGENT_PACKAGE); 2871 final boolean sendApk = mIncludeApks 2872 && !isSharedStorage 2873 && ((app.flags & ApplicationInfo.FLAG_FORWARD_LOCK) == 0) 2874 && ((app.flags & ApplicationInfo.FLAG_SYSTEM) == 0 || 2875 (app.flags & ApplicationInfo.FLAG_UPDATED_SYSTEM_APP) != 0); 2876 2877 byte[] widgetBlob = AppWidgetBackupBridge.getWidgetState(pkg.packageName, 2878 UserHandle.USER_OWNER); 2879 2880 final int token = generateToken(); 2881 FullBackupRunner runner = new FullBackupRunner(pkg, agent, pipes[1], 2882 token, sendApk, !isSharedStorage, widgetBlob); 2883 pipes[1].close(); // the runner has dup'd it 2884 pipes[1] = null; 2885 Thread t = new Thread(runner, "app-data-runner"); 2886 t.start(); 2887 2888 // Now pull data from the app and stuff it into the output 2889 try { 2890 routeSocketDataToOutput(pipes[0], mOutput); 2891 } catch (IOException e) { 2892 Slog.i(TAG, "Caught exception reading from agent", e); 2893 result = BackupTransport.AGENT_ERROR; 2894 } 2895 2896 if (!waitUntilOperationComplete(token)) { 2897 Slog.e(TAG, "Full backup failed on package " + pkg.packageName); 2898 result = BackupTransport.AGENT_ERROR; 2899 } else { 2900 if (DEBUG) Slog.d(TAG, "Full package backup success: " + pkg.packageName); 2901 } 2902 2903 } catch (IOException e) { 2904 Slog.e(TAG, "Error backing up " + pkg.packageName, e); 2905 result = BackupTransport.AGENT_ERROR; 2906 } finally { 2907 try { 2908 // flush after every package 2909 mOutput.flush(); 2910 if (pipes != null) { 2911 if (pipes[0] != null) pipes[0].close(); 2912 if (pipes[1] != null) pipes[1].close(); 2913 } 2914 } catch (IOException e) { 2915 Slog.w(TAG, "Error bringing down backup stack"); 2916 result = BackupTransport.TRANSPORT_ERROR; 2917 } 2918 } 2919 } else { 2920 Slog.w(TAG, "Unable to bind to full agent for " + pkg.packageName); 2921 result = BackupTransport.AGENT_ERROR; 2922 } 2923 tearDown(pkg); 2924 return result; 2925 } 2926 2927 private void writeApkToBackup(PackageInfo pkg, BackupDataOutput output) { 2928 // Forward-locked apps, system-bundled .apks, etc are filtered out before we get here 2929 // TODO: handle backing up split APKs 2930 final String appSourceDir = pkg.applicationInfo.getBaseCodePath(); 2931 final String apkDir = new File(appSourceDir).getParent(); 2932 FullBackup.backupToTar(pkg.packageName, FullBackup.APK_TREE_TOKEN, null, 2933 apkDir, appSourceDir, output); 2934 2935 // TODO: migrate this to SharedStorageBackup, since AID_SYSTEM 2936 // doesn't have access to external storage. 2937 2938 // Save associated .obb content if it exists and we did save the apk 2939 // check for .obb and save those too 2940 final UserEnvironment userEnv = new UserEnvironment(UserHandle.USER_OWNER); 2941 final File obbDir = userEnv.buildExternalStorageAppObbDirs(pkg.packageName)[0]; 2942 if (obbDir != null) { 2943 if (MORE_DEBUG) Log.i(TAG, "obb dir: " + obbDir.getAbsolutePath()); 2944 File[] obbFiles = obbDir.listFiles(); 2945 if (obbFiles != null) { 2946 final String obbDirName = obbDir.getAbsolutePath(); 2947 for (File obb : obbFiles) { 2948 FullBackup.backupToTar(pkg.packageName, FullBackup.OBB_TREE_TOKEN, null, 2949 obbDirName, obb.getAbsolutePath(), output); 2950 } 2951 } 2952 } 2953 } 2954 2955 private void writeAppManifest(PackageInfo pkg, File manifestFile, 2956 boolean withApk, boolean withWidgets) throws IOException { 2957 // Manifest format. All data are strings ending in LF: 2958 // BACKUP_MANIFEST_VERSION, currently 1 2959 // 2960 // Version 1: 2961 // package name 2962 // package's versionCode 2963 // platform versionCode 2964 // getInstallerPackageName() for this package (maybe empty) 2965 // boolean: "1" if archive includes .apk; any other string means not 2966 // number of signatures == N 2967 // N*: signature byte array in ascii format per Signature.toCharsString() 2968 StringBuilder builder = new StringBuilder(4096); 2969 StringBuilderPrinter printer = new StringBuilderPrinter(builder); 2970 2971 printer.println(Integer.toString(BACKUP_MANIFEST_VERSION)); 2972 printer.println(pkg.packageName); 2973 printer.println(Integer.toString(pkg.versionCode)); 2974 printer.println(Integer.toString(Build.VERSION.SDK_INT)); 2975 2976 String installerName = mPackageManager.getInstallerPackageName(pkg.packageName); 2977 printer.println((installerName != null) ? installerName : ""); 2978 2979 printer.println(withApk ? "1" : "0"); 2980 if (pkg.signatures == null) { 2981 printer.println("0"); 2982 } else { 2983 printer.println(Integer.toString(pkg.signatures.length)); 2984 for (Signature sig : pkg.signatures) { 2985 printer.println(sig.toCharsString()); 2986 } 2987 } 2988 2989 FileOutputStream outstream = new FileOutputStream(manifestFile); 2990 outstream.write(builder.toString().getBytes()); 2991 outstream.close(); 2992 } 2993 2994 // Widget metadata format. All header entries are strings ending in LF: 2995 // 2996 // Version 1 header: 2997 // BACKUP_METADATA_VERSION, currently "1" 2998 // package name 2999 // 3000 // File data (all integers are binary in network byte order) 3001 // *N: 4 : integer token identifying which metadata blob 3002 // 4 : integer size of this blob = N 3003 // N : raw bytes of this metadata blob 3004 // 3005 // Currently understood blobs (always in network byte order): 3006 // 3007 // widgets : metadata token = 0x01FFED01 (BACKUP_WIDGET_METADATA_TOKEN) 3008 // 3009 // Unrecognized blobs are *ignored*, not errors. 3010 private void writeMetadata(PackageInfo pkg, File destination, byte[] widgetData) 3011 throws IOException { 3012 StringBuilder b = new StringBuilder(512); 3013 StringBuilderPrinter printer = new StringBuilderPrinter(b); 3014 printer.println(Integer.toString(BACKUP_METADATA_VERSION)); 3015 printer.println(pkg.packageName); 3016 3017 FileOutputStream fout = new FileOutputStream(destination); 3018 BufferedOutputStream bout = new BufferedOutputStream(fout); 3019 DataOutputStream out = new DataOutputStream(bout); 3020 bout.write(b.toString().getBytes()); // bypassing DataOutputStream 3021 3022 if (widgetData != null && widgetData.length > 0) { 3023 out.writeInt(BACKUP_WIDGET_METADATA_TOKEN); 3024 out.writeInt(widgetData.length); 3025 out.write(widgetData); 3026 } 3027 bout.flush(); 3028 out.close(); 3029 } 3030 3031 private void tearDown(PackageInfo pkg) { 3032 if (pkg != null) { 3033 final ApplicationInfo app = pkg.applicationInfo; 3034 if (app != null) { 3035 try { 3036 // unbind and tidy up even on timeout or failure, just in case 3037 mActivityManager.unbindBackupAgent(app); 3038 3039 // The agent was running with a stub Application object, so shut it down. 3040 if (app.uid != Process.SYSTEM_UID 3041 && app.uid != Process.PHONE_UID) { 3042 if (MORE_DEBUG) Slog.d(TAG, "Backup complete, killing host process"); 3043 mActivityManager.killApplicationProcess(app.processName, app.uid); 3044 } else { 3045 if (MORE_DEBUG) Slog.d(TAG, "Not killing after backup: " + app.processName); 3046 } 3047 } catch (RemoteException e) { 3048 Slog.d(TAG, "Lost app trying to shut down"); 3049 } 3050 } 3051 } 3052 } 3053 } 3054 3055 // Generic driver skeleton for full backup operations 3056 abstract class FullBackupTask implements Runnable { 3057 IFullBackupRestoreObserver mObserver; 3058 3059 FullBackupTask(IFullBackupRestoreObserver observer) { 3060 mObserver = observer; 3061 } 3062 3063 // wrappers for observer use 3064 final void sendStartBackup() { 3065 if (mObserver != null) { 3066 try { 3067 mObserver.onStartBackup(); 3068 } catch (RemoteException e) { 3069 Slog.w(TAG, "full backup observer went away: startBackup"); 3070 mObserver = null; 3071 } 3072 } 3073 } 3074 3075 final void sendOnBackupPackage(String name) { 3076 if (mObserver != null) { 3077 try { 3078 // TODO: use a more user-friendly name string 3079 mObserver.onBackupPackage(name); 3080 } catch (RemoteException e) { 3081 Slog.w(TAG, "full backup observer went away: backupPackage"); 3082 mObserver = null; 3083 } 3084 } 3085 } 3086 3087 final void sendEndBackup() { 3088 if (mObserver != null) { 3089 try { 3090 mObserver.onEndBackup(); 3091 } catch (RemoteException e) { 3092 Slog.w(TAG, "full backup observer went away: endBackup"); 3093 mObserver = null; 3094 } 3095 } 3096 } 3097 } 3098 3099 // Full backup task variant used for adb backup 3100 class PerformAdbBackupTask extends FullBackupTask { 3101 FullBackupEngine mBackupEngine; 3102 final AtomicBoolean mLatch; 3103 3104 ParcelFileDescriptor mOutputFile; 3105 DeflaterOutputStream mDeflater; 3106 boolean mIncludeApks; 3107 boolean mIncludeObbs; 3108 boolean mIncludeShared; 3109 boolean mDoWidgets; 3110 boolean mAllApps; 3111 boolean mIncludeSystem; 3112 boolean mCompress; 3113 ArrayList<String> mPackages; 3114 String mCurrentPassword; 3115 String mEncryptPassword; 3116 3117 PerformAdbBackupTask(ParcelFileDescriptor fd, IFullBackupRestoreObserver observer, 3118 boolean includeApks, boolean includeObbs, boolean includeShared, 3119 boolean doWidgets, String curPassword, String encryptPassword, boolean doAllApps, 3120 boolean doSystem, boolean doCompress, String[] packages, AtomicBoolean latch) { 3121 super(observer); 3122 mLatch = latch; 3123 3124 mOutputFile = fd; 3125 mIncludeApks = includeApks; 3126 mIncludeObbs = includeObbs; 3127 mIncludeShared = includeShared; 3128 mDoWidgets = doWidgets; 3129 mAllApps = doAllApps; 3130 mIncludeSystem = doSystem; 3131 mPackages = (packages == null) 3132 ? new ArrayList<String>() 3133 : new ArrayList<String>(Arrays.asList(packages)); 3134 mCurrentPassword = curPassword; 3135 // when backing up, if there is a current backup password, we require that 3136 // the user use a nonempty encryption password as well. if one is supplied 3137 // in the UI we use that, but if the UI was left empty we fall back to the 3138 // current backup password (which was supplied by the user as well). 3139 if (encryptPassword == null || "".equals(encryptPassword)) { 3140 mEncryptPassword = curPassword; 3141 } else { 3142 mEncryptPassword = encryptPassword; 3143 } 3144 mCompress = doCompress; 3145 } 3146 3147 void addPackagesToSet(TreeMap<String, PackageInfo> set, List<String> pkgNames) { 3148 for (String pkgName : pkgNames) { 3149 if (!set.containsKey(pkgName)) { 3150 try { 3151 PackageInfo info = mPackageManager.getPackageInfo(pkgName, 3152 PackageManager.GET_SIGNATURES); 3153 set.put(pkgName, info); 3154 } catch (NameNotFoundException e) { 3155 Slog.w(TAG, "Unknown package " + pkgName + ", skipping"); 3156 } 3157 } 3158 } 3159 } 3160 3161 private OutputStream emitAesBackupHeader(StringBuilder headerbuf, 3162 OutputStream ofstream) throws Exception { 3163 // User key will be used to encrypt the master key. 3164 byte[] newUserSalt = randomBytes(PBKDF2_SALT_SIZE); 3165 SecretKey userKey = buildPasswordKey(PBKDF_CURRENT, mEncryptPassword, newUserSalt, 3166 PBKDF2_HASH_ROUNDS); 3167 3168 // the master key is random for each backup 3169 byte[] masterPw = new byte[256 / 8]; 3170 mRng.nextBytes(masterPw); 3171 byte[] checksumSalt = randomBytes(PBKDF2_SALT_SIZE); 3172 3173 // primary encryption of the datastream with the random key 3174 Cipher c = Cipher.getInstance("AES/CBC/PKCS5Padding"); 3175 SecretKeySpec masterKeySpec = new SecretKeySpec(masterPw, "AES"); 3176 c.init(Cipher.ENCRYPT_MODE, masterKeySpec); 3177 OutputStream finalOutput = new CipherOutputStream(ofstream, c); 3178 3179 // line 4: name of encryption algorithm 3180 headerbuf.append(ENCRYPTION_ALGORITHM_NAME); 3181 headerbuf.append('\n'); 3182 // line 5: user password salt [hex] 3183 headerbuf.append(byteArrayToHex(newUserSalt)); 3184 headerbuf.append('\n'); 3185 // line 6: master key checksum salt [hex] 3186 headerbuf.append(byteArrayToHex(checksumSalt)); 3187 headerbuf.append('\n'); 3188 // line 7: number of PBKDF2 rounds used [decimal] 3189 headerbuf.append(PBKDF2_HASH_ROUNDS); 3190 headerbuf.append('\n'); 3191 3192 // line 8: IV of the user key [hex] 3193 Cipher mkC = Cipher.getInstance("AES/CBC/PKCS5Padding"); 3194 mkC.init(Cipher.ENCRYPT_MODE, userKey); 3195 3196 byte[] IV = mkC.getIV(); 3197 headerbuf.append(byteArrayToHex(IV)); 3198 headerbuf.append('\n'); 3199 3200 // line 9: master IV + key blob, encrypted by the user key [hex]. Blob format: 3201 // [byte] IV length = Niv 3202 // [array of Niv bytes] IV itself 3203 // [byte] master key length = Nmk 3204 // [array of Nmk bytes] master key itself 3205 // [byte] MK checksum hash length = Nck 3206 // [array of Nck bytes] master key checksum hash 3207 // 3208 // The checksum is the (master key + checksum salt), run through the 3209 // stated number of PBKDF2 rounds 3210 IV = c.getIV(); 3211 byte[] mk = masterKeySpec.getEncoded(); 3212 byte[] checksum = makeKeyChecksum(PBKDF_CURRENT, masterKeySpec.getEncoded(), 3213 checksumSalt, PBKDF2_HASH_ROUNDS); 3214 3215 ByteArrayOutputStream blob = new ByteArrayOutputStream(IV.length + mk.length 3216 + checksum.length + 3); 3217 DataOutputStream mkOut = new DataOutputStream(blob); 3218 mkOut.writeByte(IV.length); 3219 mkOut.write(IV); 3220 mkOut.writeByte(mk.length); 3221 mkOut.write(mk); 3222 mkOut.writeByte(checksum.length); 3223 mkOut.write(checksum); 3224 mkOut.flush(); 3225 byte[] encryptedMk = mkC.doFinal(blob.toByteArray()); 3226 headerbuf.append(byteArrayToHex(encryptedMk)); 3227 headerbuf.append('\n'); 3228 3229 return finalOutput; 3230 } 3231 3232 private void finalizeBackup(OutputStream out) { 3233 try { 3234 // A standard 'tar' EOF sequence: two 512-byte blocks of all zeroes. 3235 byte[] eof = new byte[512 * 2]; // newly allocated == zero filled 3236 out.write(eof); 3237 } catch (IOException e) { 3238 Slog.w(TAG, "Error attempting to finalize backup stream"); 3239 } 3240 } 3241 3242 @Override 3243 public void run() { 3244 Slog.i(TAG, "--- Performing full-dataset adb backup ---"); 3245 3246 TreeMap<String, PackageInfo> packagesToBackup = new TreeMap<String, PackageInfo>(); 3247 FullBackupObbConnection obbConnection = new FullBackupObbConnection(); 3248 obbConnection.establish(); // we'll want this later 3249 3250 sendStartBackup(); 3251 3252 // doAllApps supersedes the package set if any 3253 if (mAllApps) { 3254 List<PackageInfo> allPackages = mPackageManager.getInstalledPackages( 3255 PackageManager.GET_SIGNATURES); 3256 for (int i = 0; i < allPackages.size(); i++) { 3257 PackageInfo pkg = allPackages.get(i); 3258 // Exclude system apps if we've been asked to do so 3259 if (mIncludeSystem == true 3260 || ((pkg.applicationInfo.flags & ApplicationInfo.FLAG_SYSTEM) != 0)) { 3261 packagesToBackup.put(pkg.packageName, pkg); 3262 } 3263 } 3264 } 3265 3266 // If we're doing widget state as well, ensure that we have all the involved 3267 // host & provider packages in the set 3268 if (mDoWidgets) { 3269 List<String> pkgs = 3270 AppWidgetBackupBridge.getWidgetParticipants(UserHandle.USER_OWNER); 3271 if (pkgs != null) { 3272 if (MORE_DEBUG) { 3273 Slog.i(TAG, "Adding widget participants to backup set:"); 3274 StringBuilder sb = new StringBuilder(128); 3275 sb.append(" "); 3276 for (String s : pkgs) { 3277 sb.append(' '); 3278 sb.append(s); 3279 } 3280 Slog.i(TAG, sb.toString()); 3281 } 3282 addPackagesToSet(packagesToBackup, pkgs); 3283 } 3284 } 3285 3286 // Now process the command line argument packages, if any. Note that explicitly- 3287 // named system-partition packages will be included even if includeSystem was 3288 // set to false. 3289 if (mPackages != null) { 3290 addPackagesToSet(packagesToBackup, mPackages); 3291 } 3292 3293 // Now we cull any inapplicable / inappropriate packages from the set. This 3294 // includes the special shared-storage agent package; we handle that one 3295 // explicitly at the end of the backup pass. 3296 Iterator<Entry<String, PackageInfo>> iter = packagesToBackup.entrySet().iterator(); 3297 while (iter.hasNext()) { 3298 PackageInfo pkg = iter.next().getValue(); 3299 if (!appIsEligibleForBackup(pkg.applicationInfo)) { 3300 iter.remove(); 3301 } 3302 } 3303 3304 // flatten the set of packages now so we can explicitly control the ordering 3305 ArrayList<PackageInfo> backupQueue = 3306 new ArrayList<PackageInfo>(packagesToBackup.values()); 3307 FileOutputStream ofstream = new FileOutputStream(mOutputFile.getFileDescriptor()); 3308 OutputStream out = null; 3309 3310 PackageInfo pkg = null; 3311 try { 3312 boolean encrypting = (mEncryptPassword != null && mEncryptPassword.length() > 0); 3313 OutputStream finalOutput = ofstream; 3314 3315 // Verify that the given password matches the currently-active 3316 // backup password, if any 3317 if (!backupPasswordMatches(mCurrentPassword)) { 3318 if (DEBUG) Slog.w(TAG, "Backup password mismatch; aborting"); 3319 return; 3320 } 3321 3322 // Write the global file header. All strings are UTF-8 encoded; lines end 3323 // with a '\n' byte. Actual backup data begins immediately following the 3324 // final '\n'. 3325 // 3326 // line 1: "ANDROID BACKUP" 3327 // line 2: backup file format version, currently "2" 3328 // line 3: compressed? "0" if not compressed, "1" if compressed. 3329 // line 4: name of encryption algorithm [currently only "none" or "AES-256"] 3330 // 3331 // When line 4 is not "none", then additional header data follows: 3332 // 3333 // line 5: user password salt [hex] 3334 // line 6: master key checksum salt [hex] 3335 // line 7: number of PBKDF2 rounds to use (same for user & master) [decimal] 3336 // line 8: IV of the user key [hex] 3337 // line 9: master key blob [hex] 3338 // IV of the master key, master key itself, master key checksum hash 3339 // 3340 // The master key checksum is the master key plus its checksum salt, run through 3341 // 10k rounds of PBKDF2. This is used to verify that the user has supplied the 3342 // correct password for decrypting the archive: the master key decrypted from 3343 // the archive using the user-supplied password is also run through PBKDF2 in 3344 // this way, and if the result does not match the checksum as stored in the 3345 // archive, then we know that the user-supplied password does not match the 3346 // archive's. 3347 StringBuilder headerbuf = new StringBuilder(1024); 3348 3349 headerbuf.append(BACKUP_FILE_HEADER_MAGIC); 3350 headerbuf.append(BACKUP_FILE_VERSION); // integer, no trailing \n 3351 headerbuf.append(mCompress ? "\n1\n" : "\n0\n"); 3352 3353 try { 3354 // Set up the encryption stage if appropriate, and emit the correct header 3355 if (encrypting) { 3356 finalOutput = emitAesBackupHeader(headerbuf, finalOutput); 3357 } else { 3358 headerbuf.append("none\n"); 3359 } 3360 3361 byte[] header = headerbuf.toString().getBytes("UTF-8"); 3362 ofstream.write(header); 3363 3364 // Set up the compression stage feeding into the encryption stage (if any) 3365 if (mCompress) { 3366 Deflater deflater = new Deflater(Deflater.BEST_COMPRESSION); 3367 finalOutput = new DeflaterOutputStream(finalOutput, deflater, true); 3368 } 3369 3370 out = finalOutput; 3371 } catch (Exception e) { 3372 // Should never happen! 3373 Slog.e(TAG, "Unable to emit archive header", e); 3374 return; 3375 } 3376 3377 // Shared storage if requested 3378 if (mIncludeShared) { 3379 try { 3380 pkg = mPackageManager.getPackageInfo(SHARED_BACKUP_AGENT_PACKAGE, 0); 3381 backupQueue.add(pkg); 3382 } catch (NameNotFoundException e) { 3383 Slog.e(TAG, "Unable to find shared-storage backup handler"); 3384 } 3385 } 3386 3387 // Now actually run the constructed backup sequence 3388 int N = backupQueue.size(); 3389 for (int i = 0; i < N; i++) { 3390 pkg = backupQueue.get(i); 3391 final boolean isSharedStorage = 3392 pkg.packageName.equals(SHARED_BACKUP_AGENT_PACKAGE); 3393 3394 mBackupEngine = new FullBackupEngine(out, pkg.packageName, mIncludeApks); 3395 sendOnBackupPackage(isSharedStorage ? "Shared storage" : pkg.packageName); 3396 mBackupEngine.backupOnePackage(pkg); 3397 3398 // after the app's agent runs to handle its private filesystem 3399 // contents, back up any OBB content it has on its behalf. 3400 if (mIncludeObbs) { 3401 boolean obbOkay = obbConnection.backupObbs(pkg, out); 3402 if (!obbOkay) { 3403 throw new RuntimeException("Failure writing OBB stack for " + pkg); 3404 } 3405 } 3406 } 3407 3408 // Done! 3409 finalizeBackup(out); 3410 } catch (RemoteException e) { 3411 Slog.e(TAG, "App died during full backup"); 3412 } catch (Exception e) { 3413 Slog.e(TAG, "Internal exception during full backup", e); 3414 } finally { 3415 try { 3416 if (out != null) out.close(); 3417 mOutputFile.close(); 3418 } catch (IOException e) { 3419 /* nothing we can do about this */ 3420 } 3421 synchronized (mCurrentOpLock) { 3422 mCurrentOperations.clear(); 3423 } 3424 synchronized (mLatch) { 3425 mLatch.set(true); 3426 mLatch.notifyAll(); 3427 } 3428 sendEndBackup(); 3429 obbConnection.tearDown(); 3430 if (DEBUG) Slog.d(TAG, "Full backup pass complete."); 3431 mWakelock.release(); 3432 } 3433 } 3434 } 3435 3436 // Full backup task extension used for transport-oriented operation 3437 class PerformFullTransportBackupTask extends FullBackupTask { 3438 static final String TAG = "PFTBT"; 3439 ArrayList<PackageInfo> mPackages; 3440 AtomicBoolean mLatch; 3441 3442 PerformFullTransportBackupTask(IFullBackupRestoreObserver observer, 3443 String[] whichPackages, AtomicBoolean latch) { 3444 super(observer); 3445 mLatch = latch; 3446 mPackages = new ArrayList<PackageInfo>(whichPackages.length); 3447 3448 for (String pkg : whichPackages) { 3449 try { 3450 PackageInfo info = mPackageManager.getPackageInfo(pkg, 3451 PackageManager.GET_SIGNATURES); 3452 if ((info.applicationInfo.flags & ApplicationInfo.FLAG_ALLOW_BACKUP) == 0 3453 || pkg.equals(SHARED_BACKUP_AGENT_PACKAGE)) { 3454 // Cull any packages that have indicated that backups are not permitted, 3455 // as well as any explicit mention of the 'special' shared-storage agent 3456 // package (we handle that one at the end). 3457 if (MORE_DEBUG) { 3458 Slog.d(TAG, "Ignoring opted-out package " + pkg); 3459 } 3460 continue; 3461 } else if ((info.applicationInfo.uid < Process.FIRST_APPLICATION_UID) 3462 && (info.applicationInfo.backupAgentName == null)) { 3463 // Cull any packages that run as system-domain uids but do not define their 3464 // own backup agents 3465 if (MORE_DEBUG) { 3466 Slog.d(TAG, "Ignoring non-agent system package " + pkg); 3467 } 3468 continue; 3469 } 3470 mPackages.add(info); 3471 } catch (NameNotFoundException e) { 3472 Slog.i(TAG, "Requested package " + pkg + " not found; ignoring"); 3473 } 3474 } 3475 } 3476 3477 @Override 3478 public void run() { 3479 IBackupTransport transport = getTransport(mCurrentTransport); 3480 if (transport == null) { 3481 Slog.w(TAG, "Transport not present; full data backup not performed"); 3482 return; 3483 } 3484 3485 // data from the app, passed to us for bridging to the transport 3486 ParcelFileDescriptor[] enginePipes = null; 3487 3488 // Pipe through which we write data to the transport 3489 ParcelFileDescriptor[] transportPipes = null; 3490 3491 try { 3492 // Set up to send data to the transport 3493 if (transport != null) { 3494 for (PackageInfo target : mPackages) { 3495 if (DEBUG) { 3496 Slog.i(TAG, "Initiating full-data transport backup of " 3497 + target.packageName); 3498 } 3499 transportPipes = ParcelFileDescriptor.createPipe(); 3500 3501 // Tell the transport the data's coming 3502 int result = transport.performFullBackup(target, transportPipes[0]); 3503 if (result == BackupTransport.TRANSPORT_OK) { 3504 // The transport has its own copy of the read end of the pipe, 3505 // so close ours now 3506 transportPipes[0].close(); 3507 transportPipes[0] = null; 3508 3509 // Now set up the backup engine / data source end of things 3510 enginePipes = ParcelFileDescriptor.createPipe(); 3511 AtomicBoolean runnerLatch = new AtomicBoolean(false); 3512 SinglePackageBackupRunner backupRunner = 3513 new SinglePackageBackupRunner(enginePipes[1], target, 3514 runnerLatch); 3515 // The runner dup'd the pipe half, so we close it here 3516 enginePipes[1].close(); 3517 enginePipes[1] = null; 3518 3519 // Spin off the runner to fetch the app's data and pipe it 3520 // into the engine pipes 3521 (new Thread(backupRunner, "package-backup-bridge")).start(); 3522 3523 // Read data off the engine pipe and pass it to the transport 3524 // pipe until we hit EOD on the input stream. 3525 FileInputStream in = new FileInputStream( 3526 enginePipes[0].getFileDescriptor()); 3527 FileOutputStream out = new FileOutputStream( 3528 transportPipes[1].getFileDescriptor()); 3529 byte[] buffer = new byte[8192]; 3530 int nRead = 0; 3531 do { 3532 nRead = in.read(buffer); 3533 if (nRead > 0) { 3534 out.write(buffer, 0, nRead); 3535 result = transport.sendBackupData(nRead); 3536 } 3537 } while (nRead > 0 && result == BackupTransport.TRANSPORT_OK); 3538 3539 // In all cases we need to give the transport its finish callback 3540 int finishResult = transport.finishBackup(); 3541 3542 if (MORE_DEBUG) { 3543 Slog.i(TAG, "Done trying to send backup data: result=" 3544 + result + " finishResult=" + finishResult); 3545 } 3546 3547 // If we were otherwise in a good state, now interpret the final 3548 // result based on what finishBackup() returned. If we're in a 3549 // failure case already, preserve that result and ignore whatever 3550 // finishBackup() reported. 3551 if (result == BackupTransport.TRANSPORT_OK) { 3552 result = finishResult; 3553 } 3554 3555 if (result != BackupTransport.TRANSPORT_OK) { 3556 Slog.e(TAG, "Error " + result 3557 + " backing up " + target.packageName); 3558 } 3559 } 3560 3561 if (result == BackupTransport.TRANSPORT_PACKAGE_REJECTED) { 3562 if (DEBUG) { 3563 Slog.i(TAG, "Transport rejected backup of " + target.packageName 3564 + ", skipping"); 3565 } 3566 // do nothing, clean up, and continue looping 3567 } else if (result != BackupTransport.TRANSPORT_OK) { 3568 if (DEBUG) { 3569 Slog.i(TAG, "Transport failed; aborting backup: " + result); 3570 return; 3571 } 3572 } 3573 cleanUpPipes(transportPipes); 3574 cleanUpPipes(enginePipes); 3575 } 3576 3577 if (DEBUG) { 3578 Slog.i(TAG, "Full backup completed."); 3579 } 3580 } 3581 } catch (Exception e) { 3582 Slog.w(TAG, "Exception trying full transport backup", e); 3583 } finally { 3584 cleanUpPipes(transportPipes); 3585 cleanUpPipes(enginePipes); 3586 synchronized (mLatch) { 3587 mLatch.set(true); 3588 mLatch.notifyAll(); 3589 } 3590 } 3591 } 3592 3593 void cleanUpPipes(ParcelFileDescriptor[] pipes) { 3594 if (pipes != null) { 3595 if (pipes[0] != null) { 3596 ParcelFileDescriptor fd = pipes[0]; 3597 pipes[0] = null; 3598 try { 3599 fd.close(); 3600 } catch (IOException e) { 3601 Slog.w(TAG, "Unable to close pipe!"); 3602 } 3603 } 3604 if (pipes[1] != null) { 3605 ParcelFileDescriptor fd = pipes[1]; 3606 pipes[1] = null; 3607 try { 3608 fd.close(); 3609 } catch (IOException e) { 3610 Slog.w(TAG, "Unable to close pipe!"); 3611 } 3612 } 3613 } 3614 } 3615 3616 // Run the backup and pipe it back to the given socket -- expects to run on 3617 // a standalone thread. The runner owns this half of the pipe, and closes 3618 // it to indicate EOD to the other end. 3619 class SinglePackageBackupRunner implements Runnable { 3620 final ParcelFileDescriptor mOutput; 3621 final PackageInfo mTarget; 3622 final AtomicBoolean mLatch; 3623 3624 SinglePackageBackupRunner(ParcelFileDescriptor output, PackageInfo target, 3625 AtomicBoolean latch) throws IOException { 3626 int oldfd = output.getFd(); 3627 mOutput = ParcelFileDescriptor.dup(output.getFileDescriptor()); 3628 mTarget = target; 3629 mLatch = latch; 3630 } 3631 3632 @Override 3633 public void run() { 3634 try { 3635 FileOutputStream out = new FileOutputStream(mOutput.getFileDescriptor()); 3636 FullBackupEngine engine = new FullBackupEngine(out, mTarget.packageName, false); 3637 engine.backupOnePackage(mTarget); 3638 } catch (Exception e) { 3639 Slog.e(TAG, "Exception during full package backup of " + mTarget); 3640 } finally { 3641 synchronized (mLatch) { 3642 mLatch.set(true); 3643 mLatch.notifyAll(); 3644 } 3645 try { 3646 mOutput.close(); 3647 } catch (IOException e) { 3648 Slog.w(TAG, "Error closing transport pipe in runner"); 3649 } 3650 } 3651 } 3652 3653 } 3654 } 3655 3656 // ----- Restore infrastructure ----- 3657 3658 abstract class RestoreEngine { 3659 static final String TAG = "RestoreEngine"; 3660 3661 public static final int SUCCESS = 0; 3662 public static final int TARGET_FAILURE = -2; 3663 public static final int TRANSPORT_FAILURE = -3; 3664 3665 private AtomicBoolean mRunning = new AtomicBoolean(false); 3666 private AtomicInteger mResult = new AtomicInteger(SUCCESS); 3667 3668 public boolean isRunning() { 3669 return mRunning.get(); 3670 } 3671 3672 public void setRunning(boolean stillRunning) { 3673 synchronized (mRunning) { 3674 mRunning.set(stillRunning); 3675 mRunning.notifyAll(); 3676 } 3677 } 3678 3679 public int waitForResult() { 3680 synchronized (mRunning) { 3681 while (isRunning()) { 3682 try { 3683 mRunning.wait(); 3684 } catch (InterruptedException e) {} 3685 } 3686 } 3687 return getResult(); 3688 } 3689 3690 public int getResult() { 3691 return mResult.get(); 3692 } 3693 3694 public void setResult(int result) { 3695 mResult.set(result); 3696 } 3697 3698 // TODO: abstract restore state and APIs 3699 } 3700 3701 // ----- Full restore from a file/socket ----- 3702 3703 // Description of a file in the restore datastream 3704 static class FileMetadata { 3705 String packageName; // name of the owning app 3706 String installerPackageName; // name of the market-type app that installed the owner 3707 int type; // e.g. BackupAgent.TYPE_DIRECTORY 3708 String domain; // e.g. FullBackup.DATABASE_TREE_TOKEN 3709 String path; // subpath within the semantic domain 3710 long mode; // e.g. 0666 (actually int) 3711 long mtime; // last mod time, UTC time_t (actually int) 3712 long size; // bytes of content 3713 3714 @Override 3715 public String toString() { 3716 StringBuilder sb = new StringBuilder(128); 3717 sb.append("FileMetadata{"); 3718 sb.append(packageName); sb.append(','); 3719 sb.append(type); sb.append(','); 3720 sb.append(domain); sb.append(':'); sb.append(path); sb.append(','); 3721 sb.append(size); 3722 sb.append('}'); 3723 return sb.toString(); 3724 } 3725 } 3726 3727 enum RestorePolicy { 3728 IGNORE, 3729 ACCEPT, 3730 ACCEPT_IF_APK 3731 } 3732 3733 // Full restore engine, used by both adb restore and transport-based full restore 3734 class FullRestoreEngine extends RestoreEngine { 3735 // Dedicated observer, if any 3736 IFullBackupRestoreObserver mObserver; 3737 3738 // Where we're delivering the file data as we go 3739 IBackupAgent mAgent; 3740 3741 // Are we permitted to only deliver a specific package's metadata? 3742 PackageInfo mOnlyPackage; 3743 3744 boolean mAllowApks; 3745 boolean mAllowObbs; 3746 3747 // Which package are we currently handling data for? 3748 String mAgentPackage; 3749 3750 // Info for working with the target app process 3751 ApplicationInfo mTargetApp; 3752 3753 // Machinery for restoring OBBs 3754 FullBackupObbConnection mObbConnection = null; 3755 3756 // possible handling states for a given package in the restore dataset 3757 final HashMap<String, RestorePolicy> mPackagePolicies 3758 = new HashMap<String, RestorePolicy>(); 3759 3760 // installer package names for each encountered app, derived from the manifests 3761 final HashMap<String, String> mPackageInstallers = new HashMap<String, String>(); 3762 3763 // Signatures for a given package found in its manifest file 3764 final HashMap<String, Signature[]> mManifestSignatures 3765 = new HashMap<String, Signature[]>(); 3766 3767 // Packages we've already wiped data on when restoring their first file 3768 final HashSet<String> mClearedPackages = new HashSet<String>(); 3769 3770 // How much data have we moved? 3771 long mBytes; 3772 3773 // Working buffer 3774 byte[] mBuffer; 3775 3776 // Pipes for moving data 3777 ParcelFileDescriptor[] mPipes = null; 3778 3779 // Widget blob to be restored out-of-band 3780 byte[] mWidgetData = null; 3781 3782 // Runner that can be placed in a separate thread to do in-process 3783 // invocations of the full restore API asynchronously 3784 class RestoreFileRunnable implements Runnable { 3785 IBackupAgent mAgent; 3786 FileMetadata mInfo; 3787 ParcelFileDescriptor mSocket; 3788 int mToken; 3789 3790 RestoreFileRunnable(IBackupAgent agent, FileMetadata info, 3791 ParcelFileDescriptor socket, int token) throws IOException { 3792 mAgent = agent; 3793 mInfo = info; 3794 mToken = token; 3795 3796 // This class is used strictly for process-local binder invocations. The 3797 // semantics of ParcelFileDescriptor differ in this case; in particular, we 3798 // do not automatically get a 'dup'ed descriptor that we can can continue 3799 // to use asynchronously from the caller. So, we make sure to dup it ourselves 3800 // before proceeding to do the restore. 3801 mSocket = ParcelFileDescriptor.dup(socket.getFileDescriptor()); 3802 } 3803 3804 @Override 3805 public void run() { 3806 try { 3807 mAgent.doRestoreFile(mSocket, mInfo.size, mInfo.type, 3808 mInfo.domain, mInfo.path, mInfo.mode, mInfo.mtime, 3809 mToken, mBackupManagerBinder); 3810 } catch (RemoteException e) { 3811 // never happens; this is used strictly for local binder calls 3812 } 3813 } 3814 } 3815 3816 public FullRestoreEngine(IFullBackupRestoreObserver observer, PackageInfo onlyPackage, 3817 boolean allowApks, boolean allowObbs) { 3818 mObserver = observer; 3819 mOnlyPackage = onlyPackage; 3820 mAllowApks = allowApks; 3821 mAllowObbs = allowObbs; 3822 mBuffer = new byte[32 * 1024]; 3823 mBytes = 0; 3824 } 3825 3826 public boolean restoreOneFile(InputStream instream) { 3827 if (!isRunning()) { 3828 Slog.w(TAG, "Restore engine used after halting"); 3829 return false; 3830 } 3831 3832 FileMetadata info; 3833 try { 3834 if (MORE_DEBUG) { 3835 Slog.v(TAG, "Reading tar header for restoring file"); 3836 } 3837 info = readTarHeaders(instream); 3838 if (info != null) { 3839 if (MORE_DEBUG) { 3840 dumpFileMetadata(info); 3841 } 3842 3843 final String pkg = info.packageName; 3844 if (!pkg.equals(mAgentPackage)) { 3845 // In the single-package case, it's a semantic error to expect 3846 // one app's data but see a different app's on the wire 3847 if (mOnlyPackage != null) { 3848 if (!pkg.equals(mOnlyPackage.packageName)) { 3849 Slog.w(TAG, "Expected data for " + mOnlyPackage 3850 + " but saw " + pkg); 3851 setResult(RestoreEngine.TRANSPORT_FAILURE); 3852 setRunning(false); 3853 return false; 3854 } 3855 } 3856 3857 // okay, change in package; set up our various 3858 // bookkeeping if we haven't seen it yet 3859 if (!mPackagePolicies.containsKey(pkg)) { 3860 mPackagePolicies.put(pkg, RestorePolicy.IGNORE); 3861 } 3862 3863 // Clean up the previous agent relationship if necessary, 3864 // and let the observer know we're considering a new app. 3865 if (mAgent != null) { 3866 if (DEBUG) Slog.d(TAG, "Saw new package; finalizing old one"); 3867 // Now we're really done 3868 tearDownPipes(); 3869 tearDownAgent(mTargetApp); 3870 mTargetApp = null; 3871 mAgentPackage = null; 3872 } 3873 } 3874 3875 if (info.path.equals(BACKUP_MANIFEST_FILENAME)) { 3876 mPackagePolicies.put(pkg, readAppManifest(info, instream)); 3877 mPackageInstallers.put(pkg, info.installerPackageName); 3878 // We've read only the manifest content itself at this point, 3879 // so consume the footer before looping around to the next 3880 // input file 3881 skipTarPadding(info.size, instream); 3882 sendOnRestorePackage(pkg); 3883 } else if (info.path.equals(BACKUP_METADATA_FILENAME)) { 3884 // Metadata blobs! 3885 readMetadata(info, instream); 3886 } else { 3887 // Non-manifest, so it's actual file data. Is this a package 3888 // we're ignoring? 3889 boolean okay = true; 3890 RestorePolicy policy = mPackagePolicies.get(pkg); 3891 switch (policy) { 3892 case IGNORE: 3893 okay = false; 3894 break; 3895 3896 case ACCEPT_IF_APK: 3897 // If we're in accept-if-apk state, then the first file we 3898 // see MUST be the apk. 3899 if (info.domain.equals(FullBackup.APK_TREE_TOKEN)) { 3900 if (DEBUG) Slog.d(TAG, "APK file; installing"); 3901 // Try to install the app. 3902 String installerName = mPackageInstallers.get(pkg); 3903 okay = installApk(info, installerName, instream); 3904 // good to go; promote to ACCEPT 3905 mPackagePolicies.put(pkg, (okay) 3906 ? RestorePolicy.ACCEPT 3907 : RestorePolicy.IGNORE); 3908 // At this point we've consumed this file entry 3909 // ourselves, so just strip the tar footer and 3910 // go on to the next file in the input stream 3911 skipTarPadding(info.size, instream); 3912 return true; 3913 } else { 3914 // File data before (or without) the apk. We can't 3915 // handle it coherently in this case so ignore it. 3916 mPackagePolicies.put(pkg, RestorePolicy.IGNORE); 3917 okay = false; 3918 } 3919 break; 3920 3921 case ACCEPT: 3922 if (info.domain.equals(FullBackup.APK_TREE_TOKEN)) { 3923 if (DEBUG) Slog.d(TAG, "apk present but ACCEPT"); 3924 // we can take the data without the apk, so we 3925 // *want* to do so. skip the apk by declaring this 3926 // one file not-okay without changing the restore 3927 // policy for the package. 3928 okay = false; 3929 } 3930 break; 3931 3932 default: 3933 // Something has gone dreadfully wrong when determining 3934 // the restore policy from the manifest. Ignore the 3935 // rest of this package's data. 3936 Slog.e(TAG, "Invalid policy from manifest"); 3937 okay = false; 3938 mPackagePolicies.put(pkg, RestorePolicy.IGNORE); 3939 break; 3940 } 3941 3942 // Is it a *file* we need to drop? 3943 if (!isRestorableFile(info)) { 3944 okay = false; 3945 } 3946 3947 // If the policy is satisfied, go ahead and set up to pipe the 3948 // data to the agent. 3949 if (DEBUG && okay && mAgent != null) { 3950 Slog.i(TAG, "Reusing existing agent instance"); 3951 } 3952 if (okay && mAgent == null) { 3953 if (DEBUG) Slog.d(TAG, "Need to launch agent for " + pkg); 3954 3955 try { 3956 mTargetApp = mPackageManager.getApplicationInfo(pkg, 0); 3957 3958 // If we haven't sent any data to this app yet, we probably 3959 // need to clear it first. Check that. 3960 if (!mClearedPackages.contains(pkg)) { 3961 // apps with their own backup agents are 3962 // responsible for coherently managing a full 3963 // restore. 3964 if (mTargetApp.backupAgentName == null) { 3965 if (DEBUG) Slog.d(TAG, "Clearing app data preparatory to full restore"); 3966 clearApplicationDataSynchronous(pkg); 3967 } else { 3968 if (DEBUG) Slog.d(TAG, "backup agent (" 3969 + mTargetApp.backupAgentName + ") => no clear"); 3970 } 3971 mClearedPackages.add(pkg); 3972 } else { 3973 if (DEBUG) Slog.d(TAG, "We've initialized this app already; no clear required"); 3974 } 3975 3976 // All set; now set up the IPC and launch the agent 3977 setUpPipes(); 3978 mAgent = bindToAgentSynchronous(mTargetApp, 3979 IApplicationThread.BACKUP_MODE_RESTORE_FULL); 3980 mAgentPackage = pkg; 3981 } catch (IOException e) { 3982 // fall through to error handling 3983 } catch (NameNotFoundException e) { 3984 // fall through to error handling 3985 } 3986 3987 if (mAgent == null) { 3988 if (DEBUG) Slog.d(TAG, "Unable to create agent for " + pkg); 3989 okay = false; 3990 tearDownPipes(); 3991 mPackagePolicies.put(pkg, RestorePolicy.IGNORE); 3992 } 3993 } 3994 3995 // Sanity check: make sure we never give data to the wrong app. This 3996 // should never happen but a little paranoia here won't go amiss. 3997 if (okay && !pkg.equals(mAgentPackage)) { 3998 Slog.e(TAG, "Restoring data for " + pkg 3999 + " but agent is for " + mAgentPackage); 4000 okay = false; 4001 } 4002 4003 // At this point we have an agent ready to handle the full 4004 // restore data as well as a pipe for sending data to 4005 // that agent. Tell the agent to start reading from the 4006 // pipe. 4007 if (okay) { 4008 boolean agentSuccess = true; 4009 long toCopy = info.size; 4010 final int token = generateToken(); 4011 try { 4012 prepareOperationTimeout(token, TIMEOUT_FULL_BACKUP_INTERVAL, null); 4013 if (info.domain.equals(FullBackup.OBB_TREE_TOKEN)) { 4014 if (DEBUG) Slog.d(TAG, "Restoring OBB file for " + pkg 4015 + " : " + info.path); 4016 mObbConnection.restoreObbFile(pkg, mPipes[0], 4017 info.size, info.type, info.path, info.mode, 4018 info.mtime, token, mBackupManagerBinder); 4019 } else { 4020 if (DEBUG) Slog.d(TAG, "Invoking agent to restore file " 4021 + info.path); 4022 // fire up the app's agent listening on the socket. If 4023 // the agent is running in the system process we can't 4024 // just invoke it asynchronously, so we provide a thread 4025 // for it here. 4026 if (mTargetApp.processName.equals("system")) { 4027 Slog.d(TAG, "system process agent - spinning a thread"); 4028 RestoreFileRunnable runner = new RestoreFileRunnable( 4029 mAgent, info, mPipes[0], token); 4030 new Thread(runner, "restore-sys-runner").start(); 4031 } else { 4032 mAgent.doRestoreFile(mPipes[0], info.size, info.type, 4033 info.domain, info.path, info.mode, info.mtime, 4034 token, mBackupManagerBinder); 4035 } 4036 } 4037 } catch (IOException e) { 4038 // couldn't dup the socket for a process-local restore 4039 Slog.d(TAG, "Couldn't establish restore"); 4040 agentSuccess = false; 4041 okay = false; 4042 } catch (RemoteException e) { 4043 // whoops, remote entity went away. We'll eat the content 4044 // ourselves, then, and not copy it over. 4045 Slog.e(TAG, "Agent crashed during full restore"); 4046 agentSuccess = false; 4047 okay = false; 4048 } 4049 4050 // Copy over the data if the agent is still good 4051 if (okay) { 4052 if (MORE_DEBUG) { 4053 Slog.v(TAG, " copying to restore agent: " 4054 + toCopy + " bytes"); 4055 } 4056 boolean pipeOkay = true; 4057 FileOutputStream pipe = new FileOutputStream( 4058 mPipes[1].getFileDescriptor()); 4059 while (toCopy > 0) { 4060 int toRead = (toCopy > mBuffer.length) 4061 ? mBuffer.length : (int)toCopy; 4062 int nRead = instream.read(mBuffer, 0, toRead); 4063 if (nRead >= 0) mBytes += nRead; 4064 if (nRead <= 0) break; 4065 toCopy -= nRead; 4066 4067 // send it to the output pipe as long as things 4068 // are still good 4069 if (pipeOkay) { 4070 try { 4071 pipe.write(mBuffer, 0, nRead); 4072 } catch (IOException e) { 4073 Slog.e(TAG, "Failed to write to restore pipe", e); 4074 pipeOkay = false; 4075 } 4076 } 4077 } 4078 4079 // done sending that file! Now we just need to consume 4080 // the delta from info.size to the end of block. 4081 skipTarPadding(info.size, instream); 4082 4083 // and now that we've sent it all, wait for the remote 4084 // side to acknowledge receipt 4085 agentSuccess = waitUntilOperationComplete(token); 4086 } 4087 4088 // okay, if the remote end failed at any point, deal with 4089 // it by ignoring the rest of the restore on it 4090 if (!agentSuccess) { 4091 if (DEBUG) { 4092 Slog.i(TAG, "Agent failure; ending restore"); 4093 } 4094 mBackupHandler.removeMessages(MSG_TIMEOUT); 4095 tearDownPipes(); 4096 tearDownAgent(mTargetApp); 4097 mAgent = null; 4098 mPackagePolicies.put(pkg, RestorePolicy.IGNORE); 4099 4100 // If this was a single-package restore, we halt immediately 4101 // with an agent error under these circumstances 4102 if (mOnlyPackage != null) { 4103 setResult(RestoreEngine.TARGET_FAILURE); 4104 setRunning(false); 4105 return false; 4106 } 4107 } 4108 } 4109 4110 // Problems setting up the agent communication, an explicitly 4111 // dropped file, or an already-ignored package: skip to the 4112 // next stream entry by reading and discarding this file. 4113 if (!okay) { 4114 if (DEBUG) Slog.d(TAG, "[discarding file content]"); 4115 long bytesToConsume = (info.size + 511) & ~511; 4116 while (bytesToConsume > 0) { 4117 int toRead = (bytesToConsume > mBuffer.length) 4118 ? mBuffer.length : (int)bytesToConsume; 4119 long nRead = instream.read(mBuffer, 0, toRead); 4120 if (nRead >= 0) mBytes += nRead; 4121 if (nRead <= 0) break; 4122 bytesToConsume -= nRead; 4123 } 4124 } 4125 } 4126 } 4127 } catch (IOException e) { 4128 if (DEBUG) Slog.w(TAG, "io exception on restore socket read", e); 4129 setResult(RestoreEngine.TRANSPORT_FAILURE); 4130 info = null; 4131 } 4132 4133 // If we got here we're either running smoothly or we've finished 4134 if (info == null) { 4135 if (MORE_DEBUG) { 4136 Slog.i(TAG, "No [more] data for this package; tearing down"); 4137 } 4138 tearDownPipes(); 4139 tearDownAgent(mTargetApp); 4140 setRunning(false); 4141 } 4142 return (info != null); 4143 } 4144 4145 void setUpPipes() throws IOException { 4146 mPipes = ParcelFileDescriptor.createPipe(); 4147 } 4148 4149 void tearDownPipes() { 4150 if (mPipes != null) { 4151 try { 4152 mPipes[0].close(); 4153 mPipes[0] = null; 4154 mPipes[1].close(); 4155 mPipes[1] = null; 4156 } catch (IOException e) { 4157 Slog.w(TAG, "Couldn't close agent pipes", e); 4158 } 4159 mPipes = null; 4160 } 4161 } 4162 4163 void tearDownAgent(ApplicationInfo app) { 4164 if (mAgent != null) { 4165 try { 4166 // unbind and tidy up even on timeout or failure, just in case 4167 mActivityManager.unbindBackupAgent(app); 4168 4169 // The agent was running with a stub Application object, so shut it down. 4170 // !!! We hardcode the confirmation UI's package name here rather than use a 4171 // manifest flag! TODO something less direct. 4172 if (app.uid != Process.SYSTEM_UID 4173 && !app.packageName.equals("com.android.backupconfirm")) { 4174 if (DEBUG) Slog.d(TAG, "Killing host process"); 4175 mActivityManager.killApplicationProcess(app.processName, app.uid); 4176 } else { 4177 if (DEBUG) Slog.d(TAG, "Not killing after full restore"); 4178 } 4179 } catch (RemoteException e) { 4180 Slog.d(TAG, "Lost app trying to shut down"); 4181 } 4182 mAgent = null; 4183 } 4184 } 4185 4186 class RestoreInstallObserver extends IPackageInstallObserver.Stub { 4187 final AtomicBoolean mDone = new AtomicBoolean(); 4188 String mPackageName; 4189 int mResult; 4190 4191 public void reset() { 4192 synchronized (mDone) { 4193 mDone.set(false); 4194 } 4195 } 4196 4197 public void waitForCompletion() { 4198 synchronized (mDone) { 4199 while (mDone.get() == false) { 4200 try { 4201 mDone.wait(); 4202 } catch (InterruptedException e) { } 4203 } 4204 } 4205 } 4206 4207 int getResult() { 4208 return mResult; 4209 } 4210 4211 @Override 4212 public void packageInstalled(String packageName, int returnCode) 4213 throws RemoteException { 4214 synchronized (mDone) { 4215 mResult = returnCode; 4216 mPackageName = packageName; 4217 mDone.set(true); 4218 mDone.notifyAll(); 4219 } 4220 } 4221 } 4222 4223 class RestoreDeleteObserver extends IPackageDeleteObserver.Stub { 4224 final AtomicBoolean mDone = new AtomicBoolean(); 4225 int mResult; 4226 4227 public void reset() { 4228 synchronized (mDone) { 4229 mDone.set(false); 4230 } 4231 } 4232 4233 public void waitForCompletion() { 4234 synchronized (mDone) { 4235 while (mDone.get() == false) { 4236 try { 4237 mDone.wait(); 4238 } catch (InterruptedException e) { } 4239 } 4240 } 4241 } 4242 4243 @Override 4244 public void packageDeleted(String packageName, int returnCode) throws RemoteException { 4245 synchronized (mDone) { 4246 mResult = returnCode; 4247 mDone.set(true); 4248 mDone.notifyAll(); 4249 } 4250 } 4251 } 4252 4253 final RestoreInstallObserver mInstallObserver = new RestoreInstallObserver(); 4254 final RestoreDeleteObserver mDeleteObserver = new RestoreDeleteObserver(); 4255 4256 boolean installApk(FileMetadata info, String installerPackage, InputStream instream) { 4257 boolean okay = true; 4258 4259 if (DEBUG) Slog.d(TAG, "Installing from backup: " + info.packageName); 4260 4261 // The file content is an .apk file. Copy it out to a staging location and 4262 // attempt to install it. 4263 File apkFile = new File(mDataDir, info.packageName); 4264 try { 4265 FileOutputStream apkStream = new FileOutputStream(apkFile); 4266 byte[] buffer = new byte[32 * 1024]; 4267 long size = info.size; 4268 while (size > 0) { 4269 long toRead = (buffer.length < size) ? buffer.length : size; 4270 int didRead = instream.read(buffer, 0, (int)toRead); 4271 if (didRead >= 0) mBytes += didRead; 4272 apkStream.write(buffer, 0, didRead); 4273 size -= didRead; 4274 } 4275 apkStream.close(); 4276 4277 // make sure the installer can read it 4278 apkFile.setReadable(true, false); 4279 4280 // Now install it 4281 Uri packageUri = Uri.fromFile(apkFile); 4282 mInstallObserver.reset(); 4283 mPackageManager.installPackage(packageUri, mInstallObserver, 4284 PackageManager.INSTALL_REPLACE_EXISTING | PackageManager.INSTALL_FROM_ADB, 4285 installerPackage); 4286 mInstallObserver.waitForCompletion(); 4287 4288 if (mInstallObserver.getResult() != PackageManager.INSTALL_SUCCEEDED) { 4289 // The only time we continue to accept install of data even if the 4290 // apk install failed is if we had already determined that we could 4291 // accept the data regardless. 4292 if (mPackagePolicies.get(info.packageName) != RestorePolicy.ACCEPT) { 4293 okay = false; 4294 } 4295 } else { 4296 // Okay, the install succeeded. Make sure it was the right app. 4297 boolean uninstall = false; 4298 if (!mInstallObserver.mPackageName.equals(info.packageName)) { 4299 Slog.w(TAG, "Restore stream claimed to include apk for " 4300 + info.packageName + " but apk was really " 4301 + mInstallObserver.mPackageName); 4302 // delete the package we just put in place; it might be fraudulent 4303 okay = false; 4304 uninstall = true; 4305 } else { 4306 try { 4307 PackageInfo pkg = mPackageManager.getPackageInfo(info.packageName, 4308 PackageManager.GET_SIGNATURES); 4309 if ((pkg.applicationInfo.flags & ApplicationInfo.FLAG_ALLOW_BACKUP) == 0) { 4310 Slog.w(TAG, "Restore stream contains apk of package " 4311 + info.packageName + " but it disallows backup/restore"); 4312 okay = false; 4313 } else { 4314 // So far so good -- do the signatures match the manifest? 4315 Signature[] sigs = mManifestSignatures.get(info.packageName); 4316 if (signaturesMatch(sigs, pkg)) { 4317 // If this is a system-uid app without a declared backup agent, 4318 // don't restore any of the file data. 4319 if ((pkg.applicationInfo.uid < Process.FIRST_APPLICATION_UID) 4320 && (pkg.applicationInfo.backupAgentName == null)) { 4321 Slog.w(TAG, "Installed app " + info.packageName 4322 + " has restricted uid and no agent"); 4323 okay = false; 4324 } 4325 } else { 4326 Slog.w(TAG, "Installed app " + info.packageName 4327 + " signatures do not match restore manifest"); 4328 okay = false; 4329 uninstall = true; 4330 } 4331 } 4332 } catch (NameNotFoundException e) { 4333 Slog.w(TAG, "Install of package " + info.packageName 4334 + " succeeded but now not found"); 4335 okay = false; 4336 } 4337 } 4338 4339 // If we're not okay at this point, we need to delete the package 4340 // that we just installed. 4341 if (uninstall) { 4342 mDeleteObserver.reset(); 4343 mPackageManager.deletePackage(mInstallObserver.mPackageName, 4344 mDeleteObserver, 0); 4345 mDeleteObserver.waitForCompletion(); 4346 } 4347 } 4348 } catch (IOException e) { 4349 Slog.e(TAG, "Unable to transcribe restored apk for install"); 4350 okay = false; 4351 } finally { 4352 apkFile.delete(); 4353 } 4354 4355 return okay; 4356 } 4357 4358 // Given an actual file content size, consume the post-content padding mandated 4359 // by the tar format. 4360 void skipTarPadding(long size, InputStream instream) throws IOException { 4361 long partial = (size + 512) % 512; 4362 if (partial > 0) { 4363 final int needed = 512 - (int)partial; 4364 if (MORE_DEBUG) { 4365 Slog.i(TAG, "Skipping tar padding: " + needed + " bytes"); 4366 } 4367 byte[] buffer = new byte[needed]; 4368 if (readExactly(instream, buffer, 0, needed) == needed) { 4369 mBytes += needed; 4370 } else throw new IOException("Unexpected EOF in padding"); 4371 } 4372 } 4373 4374 // Read a widget metadata file, returning the restored blob 4375 void readMetadata(FileMetadata info, InputStream instream) throws IOException { 4376 // Fail on suspiciously large widget dump files 4377 if (info.size > 64 * 1024) { 4378 throw new IOException("Metadata too big; corrupt? size=" + info.size); 4379 } 4380 4381 byte[] buffer = new byte[(int) info.size]; 4382 if (readExactly(instream, buffer, 0, (int)info.size) == info.size) { 4383 mBytes += info.size; 4384 } else throw new IOException("Unexpected EOF in widget data"); 4385 4386 String[] str = new String[1]; 4387 int offset = extractLine(buffer, 0, str); 4388 int version = Integer.parseInt(str[0]); 4389 if (version == BACKUP_MANIFEST_VERSION) { 4390 offset = extractLine(buffer, offset, str); 4391 final String pkg = str[0]; 4392 if (info.packageName.equals(pkg)) { 4393 // Data checks out -- the rest of the buffer is a concatenation of 4394 // binary blobs as described in the comment at writeAppWidgetData() 4395 ByteArrayInputStream bin = new ByteArrayInputStream(buffer, 4396 offset, buffer.length - offset); 4397 DataInputStream in = new DataInputStream(bin); 4398 while (bin.available() > 0) { 4399 int token = in.readInt(); 4400 int size = in.readInt(); 4401 if (size > 64 * 1024) { 4402 throw new IOException("Datum " 4403 + Integer.toHexString(token) 4404 + " too big; corrupt? size=" + info.size); 4405 } 4406 switch (token) { 4407 case BACKUP_WIDGET_METADATA_TOKEN: 4408 { 4409 if (MORE_DEBUG) { 4410 Slog.i(TAG, "Got widget metadata for " + info.packageName); 4411 } 4412 mWidgetData = new byte[size]; 4413 in.read(mWidgetData); 4414 break; 4415 } 4416 default: 4417 { 4418 if (DEBUG) { 4419 Slog.i(TAG, "Ignoring metadata blob " 4420 + Integer.toHexString(token) 4421 + " for " + info.packageName); 4422 } 4423 in.skipBytes(size); 4424 break; 4425 } 4426 } 4427 } 4428 } else { 4429 Slog.w(TAG, "Metadata mismatch: package " + info.packageName 4430 + " but widget data for " + pkg); 4431 } 4432 } else { 4433 Slog.w(TAG, "Unsupported metadata version " + version); 4434 } 4435 } 4436 4437 // Returns a policy constant 4438 RestorePolicy readAppManifest(FileMetadata info, InputStream instream) 4439 throws IOException { 4440 // Fail on suspiciously large manifest files 4441 if (info.size > 64 * 1024) { 4442 throw new IOException("Restore manifest too big; corrupt? size=" + info.size); 4443 } 4444 4445 byte[] buffer = new byte[(int) info.size]; 4446 if (MORE_DEBUG) { 4447 Slog.i(TAG, " readAppManifest() looking for " + info.size + " bytes, " 4448 + mBytes + " already consumed"); 4449 } 4450 if (readExactly(instream, buffer, 0, (int)info.size) == info.size) { 4451 mBytes += info.size; 4452 } else throw new IOException("Unexpected EOF in manifest"); 4453 4454 RestorePolicy policy = RestorePolicy.IGNORE; 4455 String[] str = new String[1]; 4456 int offset = 0; 4457 4458 try { 4459 offset = extractLine(buffer, offset, str); 4460 int version = Integer.parseInt(str[0]); 4461 if (version == BACKUP_MANIFEST_VERSION) { 4462 offset = extractLine(buffer, offset, str); 4463 String manifestPackage = str[0]; 4464 // TODO: handle <original-package> 4465 if (manifestPackage.equals(info.packageName)) { 4466 offset = extractLine(buffer, offset, str); 4467 version = Integer.parseInt(str[0]); // app version 4468 offset = extractLine(buffer, offset, str); 4469 int platformVersion = Integer.parseInt(str[0]); 4470 offset = extractLine(buffer, offset, str); 4471 info.installerPackageName = (str[0].length() > 0) ? str[0] : null; 4472 offset = extractLine(buffer, offset, str); 4473 boolean hasApk = str[0].equals("1"); 4474 offset = extractLine(buffer, offset, str); 4475 int numSigs = Integer.parseInt(str[0]); 4476 if (numSigs > 0) { 4477 Signature[] sigs = new Signature[numSigs]; 4478 for (int i = 0; i < numSigs; i++) { 4479 offset = extractLine(buffer, offset, str); 4480 sigs[i] = new Signature(str[0]); 4481 } 4482 mManifestSignatures.put(info.packageName, sigs); 4483 4484 // Okay, got the manifest info we need... 4485 try { 4486 PackageInfo pkgInfo = mPackageManager.getPackageInfo( 4487 info.packageName, PackageManager.GET_SIGNATURES); 4488 // Fall through to IGNORE if the app explicitly disallows backup 4489 final int flags = pkgInfo.applicationInfo.flags; 4490 if ((flags & ApplicationInfo.FLAG_ALLOW_BACKUP) != 0) { 4491 // Restore system-uid-space packages only if they have 4492 // defined a custom backup agent 4493 if ((pkgInfo.applicationInfo.uid >= Process.FIRST_APPLICATION_UID) 4494 || (pkgInfo.applicationInfo.backupAgentName != null)) { 4495 // Verify signatures against any installed version; if they 4496 // don't match, then we fall though and ignore the data. The 4497 // signatureMatch() method explicitly ignores the signature 4498 // check for packages installed on the system partition, because 4499 // such packages are signed with the platform cert instead of 4500 // the app developer's cert, so they're different on every 4501 // device. 4502 if (signaturesMatch(sigs, pkgInfo)) { 4503 if (pkgInfo.versionCode >= version) { 4504 Slog.i(TAG, "Sig + version match; taking data"); 4505 policy = RestorePolicy.ACCEPT; 4506 } else { 4507 // The data is from a newer version of the app than 4508 // is presently installed. That means we can only 4509 // use it if the matching apk is also supplied. 4510 if (mAllowApks) { 4511 Slog.i(TAG, "Data version " + version 4512 + " is newer than installed version " 4513 + pkgInfo.versionCode 4514 + " - requiring apk"); 4515 policy = RestorePolicy.ACCEPT_IF_APK; 4516 } else { 4517 Slog.i(TAG, "Data requires newer version " 4518 + version + "; ignoring"); 4519 policy = RestorePolicy.IGNORE; 4520 } 4521 } 4522 } else { 4523 Slog.w(TAG, "Restore manifest signatures do not match " 4524 + "installed application for " + info.packageName); 4525 } 4526 } else { 4527 Slog.w(TAG, "Package " + info.packageName 4528 + " is system level with no agent"); 4529 } 4530 } else { 4531 if (DEBUG) Slog.i(TAG, "Restore manifest from " 4532 + info.packageName + " but allowBackup=false"); 4533 } 4534 } catch (NameNotFoundException e) { 4535 // Okay, the target app isn't installed. We can process 4536 // the restore properly only if the dataset provides the 4537 // apk file and we can successfully install it. 4538 if (mAllowApks) { 4539 if (DEBUG) Slog.i(TAG, "Package " + info.packageName 4540 + " not installed; requiring apk in dataset"); 4541 policy = RestorePolicy.ACCEPT_IF_APK; 4542 } else { 4543 policy = RestorePolicy.IGNORE; 4544 } 4545 } 4546 4547 if (policy == RestorePolicy.ACCEPT_IF_APK && !hasApk) { 4548 Slog.i(TAG, "Cannot restore package " + info.packageName 4549 + " without the matching .apk"); 4550 } 4551 } else { 4552 Slog.i(TAG, "Missing signature on backed-up package " 4553 + info.packageName); 4554 } 4555 } else { 4556 Slog.i(TAG, "Expected package " + info.packageName 4557 + " but restore manifest claims " + manifestPackage); 4558 } 4559 } else { 4560 Slog.i(TAG, "Unknown restore manifest version " + version 4561 + " for package " + info.packageName); 4562 } 4563 } catch (NumberFormatException e) { 4564 Slog.w(TAG, "Corrupt restore manifest for package " + info.packageName); 4565 } catch (IllegalArgumentException e) { 4566 Slog.w(TAG, e.getMessage()); 4567 } 4568 4569 return policy; 4570 } 4571 4572 // Builds a line from a byte buffer starting at 'offset', and returns 4573 // the index of the next unconsumed data in the buffer. 4574 int extractLine(byte[] buffer, int offset, String[] outStr) throws IOException { 4575 final int end = buffer.length; 4576 if (offset >= end) throw new IOException("Incomplete data"); 4577 4578 int pos; 4579 for (pos = offset; pos < end; pos++) { 4580 byte c = buffer[pos]; 4581 // at LF we declare end of line, and return the next char as the 4582 // starting point for the next time through 4583 if (c == '\n') { 4584 break; 4585 } 4586 } 4587 outStr[0] = new String(buffer, offset, pos - offset); 4588 pos++; // may be pointing an extra byte past the end but that's okay 4589 return pos; 4590 } 4591 4592 void dumpFileMetadata(FileMetadata info) { 4593 if (DEBUG) { 4594 StringBuilder b = new StringBuilder(128); 4595 4596 // mode string 4597 b.append((info.type == BackupAgent.TYPE_DIRECTORY) ? 'd' : '-'); 4598 b.append(((info.mode & 0400) != 0) ? 'r' : '-'); 4599 b.append(((info.mode & 0200) != 0) ? 'w' : '-'); 4600 b.append(((info.mode & 0100) != 0) ? 'x' : '-'); 4601 b.append(((info.mode & 0040) != 0) ? 'r' : '-'); 4602 b.append(((info.mode & 0020) != 0) ? 'w' : '-'); 4603 b.append(((info.mode & 0010) != 0) ? 'x' : '-'); 4604 b.append(((info.mode & 0004) != 0) ? 'r' : '-'); 4605 b.append(((info.mode & 0002) != 0) ? 'w' : '-'); 4606 b.append(((info.mode & 0001) != 0) ? 'x' : '-'); 4607 b.append(String.format(" %9d ", info.size)); 4608 4609 Date stamp = new Date(info.mtime); 4610 b.append(new SimpleDateFormat("MMM dd HH:mm:ss ").format(stamp)); 4611 4612 b.append(info.packageName); 4613 b.append(" :: "); 4614 b.append(info.domain); 4615 b.append(" :: "); 4616 b.append(info.path); 4617 4618 Slog.i(TAG, b.toString()); 4619 } 4620 } 4621 4622 // Consume a tar file header block [sequence] and accumulate the relevant metadata 4623 FileMetadata readTarHeaders(InputStream instream) throws IOException { 4624 byte[] block = new byte[512]; 4625 FileMetadata info = null; 4626 4627 boolean gotHeader = readTarHeader(instream, block); 4628 if (gotHeader) { 4629 try { 4630 // okay, presume we're okay, and extract the various metadata 4631 info = new FileMetadata(); 4632 info.size = extractRadix(block, 124, 12, 8); 4633 info.mtime = extractRadix(block, 136, 12, 8); 4634 info.mode = extractRadix(block, 100, 8, 8); 4635 4636 info.path = extractString(block, 345, 155); // prefix 4637 String path = extractString(block, 0, 100); 4638 if (path.length() > 0) { 4639 if (info.path.length() > 0) info.path += '/'; 4640 info.path += path; 4641 } 4642 4643 // tar link indicator field: 1 byte at offset 156 in the header. 4644 int typeChar = block[156]; 4645 if (typeChar == 'x') { 4646 // pax extended header, so we need to read that 4647 gotHeader = readPaxExtendedHeader(instream, info); 4648 if (gotHeader) { 4649 // and after a pax extended header comes another real header -- read 4650 // that to find the real file type 4651 gotHeader = readTarHeader(instream, block); 4652 } 4653 if (!gotHeader) throw new IOException("Bad or missing pax header"); 4654 4655 typeChar = block[156]; 4656 } 4657 4658 switch (typeChar) { 4659 case '0': info.type = BackupAgent.TYPE_FILE; break; 4660 case '5': { 4661 info.type = BackupAgent.TYPE_DIRECTORY; 4662 if (info.size != 0) { 4663 Slog.w(TAG, "Directory entry with nonzero size in header"); 4664 info.size = 0; 4665 } 4666 break; 4667 } 4668 case 0: { 4669 // presume EOF 4670 if (DEBUG) Slog.w(TAG, "Saw type=0 in tar header block, info=" + info); 4671 return null; 4672 } 4673 default: { 4674 Slog.e(TAG, "Unknown tar entity type: " + typeChar); 4675 throw new IOException("Unknown entity type " + typeChar); 4676 } 4677 } 4678 4679 // Parse out the path 4680 // 4681 // first: apps/shared/unrecognized 4682 if (FullBackup.SHARED_PREFIX.regionMatches(0, 4683 info.path, 0, FullBackup.SHARED_PREFIX.length())) { 4684 // File in shared storage. !!! TODO: implement this. 4685 info.path = info.path.substring(FullBackup.SHARED_PREFIX.length()); 4686 info.packageName = SHARED_BACKUP_AGENT_PACKAGE; 4687 info.domain = FullBackup.SHARED_STORAGE_TOKEN; 4688 if (DEBUG) Slog.i(TAG, "File in shared storage: " + info.path); 4689 } else if (FullBackup.APPS_PREFIX.regionMatches(0, 4690 info.path, 0, FullBackup.APPS_PREFIX.length())) { 4691 // App content! Parse out the package name and domain 4692 4693 // strip the apps/ prefix 4694 info.path = info.path.substring(FullBackup.APPS_PREFIX.length()); 4695 4696 // extract the package name 4697 int slash = info.path.indexOf('/'); 4698 if (slash < 0) throw new IOException("Illegal semantic path in " + info.path); 4699 info.packageName = info.path.substring(0, slash); 4700 info.path = info.path.substring(slash+1); 4701 4702 // if it's a manifest we're done, otherwise parse out the domains 4703 if (!info.path.equals(BACKUP_MANIFEST_FILENAME)) { 4704 slash = info.path.indexOf('/'); 4705 if (slash < 0) { 4706 throw new IOException("Illegal semantic path in non-manifest " 4707 + info.path); 4708 } 4709 info.domain = info.path.substring(0, slash); 4710 info.path = info.path.substring(slash + 1); 4711 } 4712 } 4713 } catch (IOException e) { 4714 if (DEBUG) { 4715 Slog.e(TAG, "Parse error in header: " + e.getMessage()); 4716 HEXLOG(block); 4717 } 4718 throw e; 4719 } 4720 } 4721 return info; 4722 } 4723 4724 private boolean isRestorableFile(FileMetadata info) { 4725 if (FullBackup.CACHE_TREE_TOKEN.equals(info.domain)) { 4726 if (MORE_DEBUG) { 4727 Slog.i(TAG, "Dropping cache file path " + info.path); 4728 } 4729 return false; 4730 } 4731 4732 if (FullBackup.ROOT_TREE_TOKEN.equals(info.domain)) { 4733 // It's possible this is "no-backup" dir contents in an archive stream 4734 // produced on a device running a version of the OS that predates that 4735 // API. Respect the no-backup intention and don't let the data get to 4736 // the app. 4737 if (info.path.startsWith("no_backup/")) { 4738 if (MORE_DEBUG) { 4739 Slog.i(TAG, "Dropping no_backup file path " + info.path); 4740 } 4741 return false; 4742 } 4743 } 4744 4745 // Otherwise we think this file is good to go 4746 return true; 4747 } 4748 4749 private void HEXLOG(byte[] block) { 4750 int offset = 0; 4751 int todo = block.length; 4752 StringBuilder buf = new StringBuilder(64); 4753 while (todo > 0) { 4754 buf.append(String.format("%04x ", offset)); 4755 int numThisLine = (todo > 16) ? 16 : todo; 4756 for (int i = 0; i < numThisLine; i++) { 4757 buf.append(String.format("%02x ", block[offset+i])); 4758 } 4759 Slog.i("hexdump", buf.toString()); 4760 buf.setLength(0); 4761 todo -= numThisLine; 4762 offset += numThisLine; 4763 } 4764 } 4765 4766 // Read exactly the given number of bytes into a buffer at the stated offset. 4767 // Returns false if EOF is encountered before the requested number of bytes 4768 // could be read. 4769 int readExactly(InputStream in, byte[] buffer, int offset, int size) 4770 throws IOException { 4771 if (size <= 0) throw new IllegalArgumentException("size must be > 0"); 4772if (MORE_DEBUG) Slog.i(TAG, " ... readExactly(" + size + ") called"); 4773 int soFar = 0; 4774 while (soFar < size) { 4775 int nRead = in.read(buffer, offset + soFar, size - soFar); 4776 if (nRead <= 0) { 4777 if (MORE_DEBUG) Slog.w(TAG, "- wanted exactly " + size + " but got only " + soFar); 4778 break; 4779 } 4780 soFar += nRead; 4781if (MORE_DEBUG) Slog.v(TAG, " + got " + nRead + "; now wanting " + (size - soFar)); 4782 } 4783 return soFar; 4784 } 4785 4786 boolean readTarHeader(InputStream instream, byte[] block) throws IOException { 4787 final int got = readExactly(instream, block, 0, 512); 4788 if (got == 0) return false; // Clean EOF 4789 if (got < 512) throw new IOException("Unable to read full block header"); 4790 mBytes += 512; 4791 return true; 4792 } 4793 4794 // overwrites 'info' fields based on the pax extended header 4795 boolean readPaxExtendedHeader(InputStream instream, FileMetadata info) 4796 throws IOException { 4797 // We should never see a pax extended header larger than this 4798 if (info.size > 32*1024) { 4799 Slog.w(TAG, "Suspiciously large pax header size " + info.size 4800 + " - aborting"); 4801 throw new IOException("Sanity failure: pax header size " + info.size); 4802 } 4803 4804 // read whole blocks, not just the content size 4805 int numBlocks = (int)((info.size + 511) >> 9); 4806 byte[] data = new byte[numBlocks * 512]; 4807 if (readExactly(instream, data, 0, data.length) < data.length) { 4808 throw new IOException("Unable to read full pax header"); 4809 } 4810 mBytes += data.length; 4811 4812 final int contentSize = (int) info.size; 4813 int offset = 0; 4814 do { 4815 // extract the line at 'offset' 4816 int eol = offset+1; 4817 while (eol < contentSize && data[eol] != ' ') eol++; 4818 if (eol >= contentSize) { 4819 // error: we just hit EOD looking for the end of the size field 4820 throw new IOException("Invalid pax data"); 4821 } 4822 // eol points to the space between the count and the key 4823 int linelen = (int) extractRadix(data, offset, eol - offset, 10); 4824 int key = eol + 1; // start of key=value 4825 eol = offset + linelen - 1; // trailing LF 4826 int value; 4827 for (value = key+1; data[value] != '=' && value <= eol; value++); 4828 if (value > eol) { 4829 throw new IOException("Invalid pax declaration"); 4830 } 4831 4832 // pax requires that key/value strings be in UTF-8 4833 String keyStr = new String(data, key, value-key, "UTF-8"); 4834 // -1 to strip the trailing LF 4835 String valStr = new String(data, value+1, eol-value-1, "UTF-8"); 4836 4837 if ("path".equals(keyStr)) { 4838 info.path = valStr; 4839 } else if ("size".equals(keyStr)) { 4840 info.size = Long.parseLong(valStr); 4841 } else { 4842 if (DEBUG) Slog.i(TAG, "Unhandled pax key: " + key); 4843 } 4844 4845 offset += linelen; 4846 } while (offset < contentSize); 4847 4848 return true; 4849 } 4850 4851 long extractRadix(byte[] data, int offset, int maxChars, int radix) 4852 throws IOException { 4853 long value = 0; 4854 final int end = offset + maxChars; 4855 for (int i = offset; i < end; i++) { 4856 final byte b = data[i]; 4857 // Numeric fields in tar can terminate with either NUL or SPC 4858 if (b == 0 || b == ' ') break; 4859 if (b < '0' || b > ('0' + radix - 1)) { 4860 throw new IOException("Invalid number in header: '" + (char)b 4861 + "' for radix " + radix); 4862 } 4863 value = radix * value + (b - '0'); 4864 } 4865 return value; 4866 } 4867 4868 String extractString(byte[] data, int offset, int maxChars) throws IOException { 4869 final int end = offset + maxChars; 4870 int eos = offset; 4871 // tar string fields terminate early with a NUL 4872 while (eos < end && data[eos] != 0) eos++; 4873 return new String(data, offset, eos-offset, "US-ASCII"); 4874 } 4875 4876 void sendStartRestore() { 4877 if (mObserver != null) { 4878 try { 4879 mObserver.onStartRestore(); 4880 } catch (RemoteException e) { 4881 Slog.w(TAG, "full restore observer went away: startRestore"); 4882 mObserver = null; 4883 } 4884 } 4885 } 4886 4887 void sendOnRestorePackage(String name) { 4888 if (mObserver != null) { 4889 try { 4890 // TODO: use a more user-friendly name string 4891 mObserver.onRestorePackage(name); 4892 } catch (RemoteException e) { 4893 Slog.w(TAG, "full restore observer went away: restorePackage"); 4894 mObserver = null; 4895 } 4896 } 4897 } 4898 4899 void sendEndRestore() { 4900 if (mObserver != null) { 4901 try { 4902 mObserver.onEndRestore(); 4903 } catch (RemoteException e) { 4904 Slog.w(TAG, "full restore observer went away: endRestore"); 4905 mObserver = null; 4906 } 4907 } 4908 } 4909 } 4910 4911 // ***** end new engine class *** 4912 4913 class PerformAdbRestoreTask implements Runnable { 4914 ParcelFileDescriptor mInputFile; 4915 String mCurrentPassword; 4916 String mDecryptPassword; 4917 IFullBackupRestoreObserver mObserver; 4918 AtomicBoolean mLatchObject; 4919 IBackupAgent mAgent; 4920 String mAgentPackage; 4921 ApplicationInfo mTargetApp; 4922 FullBackupObbConnection mObbConnection = null; 4923 ParcelFileDescriptor[] mPipes = null; 4924 byte[] mWidgetData = null; 4925 4926 long mBytes; 4927 4928 // possible handling states for a given package in the restore dataset 4929 final HashMap<String, RestorePolicy> mPackagePolicies 4930 = new HashMap<String, RestorePolicy>(); 4931 4932 // installer package names for each encountered app, derived from the manifests 4933 final HashMap<String, String> mPackageInstallers = new HashMap<String, String>(); 4934 4935 // Signatures for a given package found in its manifest file 4936 final HashMap<String, Signature[]> mManifestSignatures 4937 = new HashMap<String, Signature[]>(); 4938 4939 // Packages we've already wiped data on when restoring their first file 4940 final HashSet<String> mClearedPackages = new HashSet<String>(); 4941 4942 PerformAdbRestoreTask(ParcelFileDescriptor fd, String curPassword, String decryptPassword, 4943 IFullBackupRestoreObserver observer, AtomicBoolean latch) { 4944 mInputFile = fd; 4945 mCurrentPassword = curPassword; 4946 mDecryptPassword = decryptPassword; 4947 mObserver = observer; 4948 mLatchObject = latch; 4949 mAgent = null; 4950 mAgentPackage = null; 4951 mTargetApp = null; 4952 mObbConnection = new FullBackupObbConnection(); 4953 4954 // Which packages we've already wiped data on. We prepopulate this 4955 // with a whitelist of packages known to be unclearable. 4956 mClearedPackages.add("android"); 4957 mClearedPackages.add(SETTINGS_PACKAGE); 4958 } 4959 4960 class RestoreFileRunnable implements Runnable { 4961 IBackupAgent mAgent; 4962 FileMetadata mInfo; 4963 ParcelFileDescriptor mSocket; 4964 int mToken; 4965 4966 RestoreFileRunnable(IBackupAgent agent, FileMetadata info, 4967 ParcelFileDescriptor socket, int token) throws IOException { 4968 mAgent = agent; 4969 mInfo = info; 4970 mToken = token; 4971 4972 // This class is used strictly for process-local binder invocations. The 4973 // semantics of ParcelFileDescriptor differ in this case; in particular, we 4974 // do not automatically get a 'dup'ed descriptor that we can can continue 4975 // to use asynchronously from the caller. So, we make sure to dup it ourselves 4976 // before proceeding to do the restore. 4977 mSocket = ParcelFileDescriptor.dup(socket.getFileDescriptor()); 4978 } 4979 4980 @Override 4981 public void run() { 4982 try { 4983 mAgent.doRestoreFile(mSocket, mInfo.size, mInfo.type, 4984 mInfo.domain, mInfo.path, mInfo.mode, mInfo.mtime, 4985 mToken, mBackupManagerBinder); 4986 } catch (RemoteException e) { 4987 // never happens; this is used strictly for local binder calls 4988 } 4989 } 4990 } 4991 4992 @Override 4993 public void run() { 4994 Slog.i(TAG, "--- Performing full-dataset restore ---"); 4995 mObbConnection.establish(); 4996 sendStartRestore(); 4997 4998 // Are we able to restore shared-storage data? 4999 if (Environment.getExternalStorageState().equals(Environment.MEDIA_MOUNTED)) { 5000 mPackagePolicies.put(SHARED_BACKUP_AGENT_PACKAGE, RestorePolicy.ACCEPT); 5001 } 5002 5003 FileInputStream rawInStream = null; 5004 DataInputStream rawDataIn = null; 5005 try { 5006 if (!backupPasswordMatches(mCurrentPassword)) { 5007 if (DEBUG) Slog.w(TAG, "Backup password mismatch; aborting"); 5008 return; 5009 } 5010 5011 mBytes = 0; 5012 byte[] buffer = new byte[32 * 1024]; 5013 rawInStream = new FileInputStream(mInputFile.getFileDescriptor()); 5014 rawDataIn = new DataInputStream(rawInStream); 5015 5016 // First, parse out the unencrypted/uncompressed header 5017 boolean compressed = false; 5018 InputStream preCompressStream = rawInStream; 5019 final InputStream in; 5020 5021 boolean okay = false; 5022 final int headerLen = BACKUP_FILE_HEADER_MAGIC.length(); 5023 byte[] streamHeader = new byte[headerLen]; 5024 rawDataIn.readFully(streamHeader); 5025 byte[] magicBytes = BACKUP_FILE_HEADER_MAGIC.getBytes("UTF-8"); 5026 if (Arrays.equals(magicBytes, streamHeader)) { 5027 // okay, header looks good. now parse out the rest of the fields. 5028 String s = readHeaderLine(rawInStream); 5029 final int archiveVersion = Integer.parseInt(s); 5030 if (archiveVersion <= BACKUP_FILE_VERSION) { 5031 // okay, it's a version we recognize. if it's version 1, we may need 5032 // to try two different PBKDF2 regimes to compare checksums. 5033 final boolean pbkdf2Fallback = (archiveVersion == 1); 5034 5035 s = readHeaderLine(rawInStream); 5036 compressed = (Integer.parseInt(s) != 0); 5037 s = readHeaderLine(rawInStream); 5038 if (s.equals("none")) { 5039 // no more header to parse; we're good to go 5040 okay = true; 5041 } else if (mDecryptPassword != null && mDecryptPassword.length() > 0) { 5042 preCompressStream = decodeAesHeaderAndInitialize(s, pbkdf2Fallback, 5043 rawInStream); 5044 if (preCompressStream != null) { 5045 okay = true; 5046 } 5047 } else Slog.w(TAG, "Archive is encrypted but no password given"); 5048 } else Slog.w(TAG, "Wrong header version: " + s); 5049 } else Slog.w(TAG, "Didn't read the right header magic"); 5050 5051 if (!okay) { 5052 Slog.w(TAG, "Invalid restore data; aborting."); 5053 return; 5054 } 5055 5056 // okay, use the right stream layer based on compression 5057 in = (compressed) ? new InflaterInputStream(preCompressStream) : preCompressStream; 5058 5059 boolean didRestore; 5060 do { 5061 didRestore = restoreOneFile(in, buffer); 5062 } while (didRestore); 5063 5064 if (MORE_DEBUG) Slog.v(TAG, "Done consuming input tarfile, total bytes=" + mBytes); 5065 } catch (IOException e) { 5066 Slog.e(TAG, "Unable to read restore input"); 5067 } finally { 5068 tearDownPipes(); 5069 tearDownAgent(mTargetApp); 5070 5071 try { 5072 if (rawDataIn != null) rawDataIn.close(); 5073 if (rawInStream != null) rawInStream.close(); 5074 mInputFile.close(); 5075 } catch (IOException e) { 5076 Slog.w(TAG, "Close of restore data pipe threw", e); 5077 /* nothing we can do about this */ 5078 } 5079 synchronized (mCurrentOpLock) { 5080 mCurrentOperations.clear(); 5081 } 5082 synchronized (mLatchObject) { 5083 mLatchObject.set(true); 5084 mLatchObject.notifyAll(); 5085 } 5086 mObbConnection.tearDown(); 5087 sendEndRestore(); 5088 Slog.d(TAG, "Full restore pass complete."); 5089 mWakelock.release(); 5090 } 5091 } 5092 5093 String readHeaderLine(InputStream in) throws IOException { 5094 int c; 5095 StringBuilder buffer = new StringBuilder(80); 5096 while ((c = in.read()) >= 0) { 5097 if (c == '\n') break; // consume and discard the newlines 5098 buffer.append((char)c); 5099 } 5100 return buffer.toString(); 5101 } 5102 5103 InputStream attemptMasterKeyDecryption(String algorithm, byte[] userSalt, byte[] ckSalt, 5104 int rounds, String userIvHex, String masterKeyBlobHex, InputStream rawInStream, 5105 boolean doLog) { 5106 InputStream result = null; 5107 5108 try { 5109 Cipher c = Cipher.getInstance("AES/CBC/PKCS5Padding"); 5110 SecretKey userKey = buildPasswordKey(algorithm, mDecryptPassword, userSalt, 5111 rounds); 5112 byte[] IV = hexToByteArray(userIvHex); 5113 IvParameterSpec ivSpec = new IvParameterSpec(IV); 5114 c.init(Cipher.DECRYPT_MODE, 5115 new SecretKeySpec(userKey.getEncoded(), "AES"), 5116 ivSpec); 5117 byte[] mkCipher = hexToByteArray(masterKeyBlobHex); 5118 byte[] mkBlob = c.doFinal(mkCipher); 5119 5120 // first, the master key IV 5121 int offset = 0; 5122 int len = mkBlob[offset++]; 5123 IV = Arrays.copyOfRange(mkBlob, offset, offset + len); 5124 offset += len; 5125 // then the master key itself 5126 len = mkBlob[offset++]; 5127 byte[] mk = Arrays.copyOfRange(mkBlob, 5128 offset, offset + len); 5129 offset += len; 5130 // and finally the master key checksum hash 5131 len = mkBlob[offset++]; 5132 byte[] mkChecksum = Arrays.copyOfRange(mkBlob, 5133 offset, offset + len); 5134 5135 // now validate the decrypted master key against the checksum 5136 byte[] calculatedCk = makeKeyChecksum(algorithm, mk, ckSalt, rounds); 5137 if (Arrays.equals(calculatedCk, mkChecksum)) { 5138 ivSpec = new IvParameterSpec(IV); 5139 c.init(Cipher.DECRYPT_MODE, 5140 new SecretKeySpec(mk, "AES"), 5141 ivSpec); 5142 // Only if all of the above worked properly will 'result' be assigned 5143 result = new CipherInputStream(rawInStream, c); 5144 } else if (doLog) Slog.w(TAG, "Incorrect password"); 5145 } catch (InvalidAlgorithmParameterException e) { 5146 if (doLog) Slog.e(TAG, "Needed parameter spec unavailable!", e); 5147 } catch (BadPaddingException e) { 5148 // This case frequently occurs when the wrong password is used to decrypt 5149 // the master key. Use the identical "incorrect password" log text as is 5150 // used in the checksum failure log in order to avoid providing additional 5151 // information to an attacker. 5152 if (doLog) Slog.w(TAG, "Incorrect password"); 5153 } catch (IllegalBlockSizeException e) { 5154 if (doLog) Slog.w(TAG, "Invalid block size in master key"); 5155 } catch (NoSuchAlgorithmException e) { 5156 if (doLog) Slog.e(TAG, "Needed decryption algorithm unavailable!"); 5157 } catch (NoSuchPaddingException e) { 5158 if (doLog) Slog.e(TAG, "Needed padding mechanism unavailable!"); 5159 } catch (InvalidKeyException e) { 5160 if (doLog) Slog.w(TAG, "Illegal password; aborting"); 5161 } 5162 5163 return result; 5164 } 5165 5166 InputStream decodeAesHeaderAndInitialize(String encryptionName, boolean pbkdf2Fallback, 5167 InputStream rawInStream) { 5168 InputStream result = null; 5169 try { 5170 if (encryptionName.equals(ENCRYPTION_ALGORITHM_NAME)) { 5171 5172 String userSaltHex = readHeaderLine(rawInStream); // 5 5173 byte[] userSalt = hexToByteArray(userSaltHex); 5174 5175 String ckSaltHex = readHeaderLine(rawInStream); // 6 5176 byte[] ckSalt = hexToByteArray(ckSaltHex); 5177 5178 int rounds = Integer.parseInt(readHeaderLine(rawInStream)); // 7 5179 String userIvHex = readHeaderLine(rawInStream); // 8 5180 5181 String masterKeyBlobHex = readHeaderLine(rawInStream); // 9 5182 5183 // decrypt the master key blob 5184 result = attemptMasterKeyDecryption(PBKDF_CURRENT, userSalt, ckSalt, 5185 rounds, userIvHex, masterKeyBlobHex, rawInStream, false); 5186 if (result == null && pbkdf2Fallback) { 5187 result = attemptMasterKeyDecryption(PBKDF_FALLBACK, userSalt, ckSalt, 5188 rounds, userIvHex, masterKeyBlobHex, rawInStream, true); 5189 } 5190 } else Slog.w(TAG, "Unsupported encryption method: " + encryptionName); 5191 } catch (NumberFormatException e) { 5192 Slog.w(TAG, "Can't parse restore data header"); 5193 } catch (IOException e) { 5194 Slog.w(TAG, "Can't read input header"); 5195 } 5196 5197 return result; 5198 } 5199 5200 boolean restoreOneFile(InputStream instream, byte[] buffer) { 5201 FileMetadata info; 5202 try { 5203 info = readTarHeaders(instream); 5204 if (info != null) { 5205 if (MORE_DEBUG) { 5206 dumpFileMetadata(info); 5207 } 5208 5209 final String pkg = info.packageName; 5210 if (!pkg.equals(mAgentPackage)) { 5211 // okay, change in package; set up our various 5212 // bookkeeping if we haven't seen it yet 5213 if (!mPackagePolicies.containsKey(pkg)) { 5214 mPackagePolicies.put(pkg, RestorePolicy.IGNORE); 5215 } 5216 5217 // Clean up the previous agent relationship if necessary, 5218 // and let the observer know we're considering a new app. 5219 if (mAgent != null) { 5220 if (DEBUG) Slog.d(TAG, "Saw new package; finalizing old one"); 5221 // Now we're really done 5222 tearDownPipes(); 5223 tearDownAgent(mTargetApp); 5224 mTargetApp = null; 5225 mAgentPackage = null; 5226 } 5227 } 5228 5229 if (info.path.equals(BACKUP_MANIFEST_FILENAME)) { 5230 mPackagePolicies.put(pkg, readAppManifest(info, instream)); 5231 mPackageInstallers.put(pkg, info.installerPackageName); 5232 // We've read only the manifest content itself at this point, 5233 // so consume the footer before looping around to the next 5234 // input file 5235 skipTarPadding(info.size, instream); 5236 sendOnRestorePackage(pkg); 5237 } else if (info.path.equals(BACKUP_METADATA_FILENAME)) { 5238 // Metadata blobs! 5239 readMetadata(info, instream); 5240 } else { 5241 // Non-manifest, so it's actual file data. Is this a package 5242 // we're ignoring? 5243 boolean okay = true; 5244 RestorePolicy policy = mPackagePolicies.get(pkg); 5245 switch (policy) { 5246 case IGNORE: 5247 okay = false; 5248 break; 5249 5250 case ACCEPT_IF_APK: 5251 // If we're in accept-if-apk state, then the first file we 5252 // see MUST be the apk. 5253 if (info.domain.equals(FullBackup.APK_TREE_TOKEN)) { 5254 if (DEBUG) Slog.d(TAG, "APK file; installing"); 5255 // Try to install the app. 5256 String installerName = mPackageInstallers.get(pkg); 5257 okay = installApk(info, installerName, instream); 5258 // good to go; promote to ACCEPT 5259 mPackagePolicies.put(pkg, (okay) 5260 ? RestorePolicy.ACCEPT 5261 : RestorePolicy.IGNORE); 5262 // At this point we've consumed this file entry 5263 // ourselves, so just strip the tar footer and 5264 // go on to the next file in the input stream 5265 skipTarPadding(info.size, instream); 5266 return true; 5267 } else { 5268 // File data before (or without) the apk. We can't 5269 // handle it coherently in this case so ignore it. 5270 mPackagePolicies.put(pkg, RestorePolicy.IGNORE); 5271 okay = false; 5272 } 5273 break; 5274 5275 case ACCEPT: 5276 if (info.domain.equals(FullBackup.APK_TREE_TOKEN)) { 5277 if (DEBUG) Slog.d(TAG, "apk present but ACCEPT"); 5278 // we can take the data without the apk, so we 5279 // *want* to do so. skip the apk by declaring this 5280 // one file not-okay without changing the restore 5281 // policy for the package. 5282 okay = false; 5283 } 5284 break; 5285 5286 default: 5287 // Something has gone dreadfully wrong when determining 5288 // the restore policy from the manifest. Ignore the 5289 // rest of this package's data. 5290 Slog.e(TAG, "Invalid policy from manifest"); 5291 okay = false; 5292 mPackagePolicies.put(pkg, RestorePolicy.IGNORE); 5293 break; 5294 } 5295 5296 // If the policy is satisfied, go ahead and set up to pipe the 5297 // data to the agent. 5298 if (DEBUG && okay && mAgent != null) { 5299 Slog.i(TAG, "Reusing existing agent instance"); 5300 } 5301 if (okay && mAgent == null) { 5302 if (DEBUG) Slog.d(TAG, "Need to launch agent for " + pkg); 5303 5304 try { 5305 mTargetApp = mPackageManager.getApplicationInfo(pkg, 0); 5306 5307 // If we haven't sent any data to this app yet, we probably 5308 // need to clear it first. Check that. 5309 if (!mClearedPackages.contains(pkg)) { 5310 // apps with their own backup agents are 5311 // responsible for coherently managing a full 5312 // restore. 5313 if (mTargetApp.backupAgentName == null) { 5314 if (DEBUG) Slog.d(TAG, "Clearing app data preparatory to full restore"); 5315 clearApplicationDataSynchronous(pkg); 5316 } else { 5317 if (DEBUG) Slog.d(TAG, "backup agent (" 5318 + mTargetApp.backupAgentName + ") => no clear"); 5319 } 5320 mClearedPackages.add(pkg); 5321 } else { 5322 if (DEBUG) Slog.d(TAG, "We've initialized this app already; no clear required"); 5323 } 5324 5325 // All set; now set up the IPC and launch the agent 5326 setUpPipes(); 5327 mAgent = bindToAgentSynchronous(mTargetApp, 5328 IApplicationThread.BACKUP_MODE_RESTORE_FULL); 5329 mAgentPackage = pkg; 5330 } catch (IOException e) { 5331 // fall through to error handling 5332 } catch (NameNotFoundException e) { 5333 // fall through to error handling 5334 } 5335 5336 if (mAgent == null) { 5337 if (DEBUG) Slog.d(TAG, "Unable to create agent for " + pkg); 5338 okay = false; 5339 tearDownPipes(); 5340 mPackagePolicies.put(pkg, RestorePolicy.IGNORE); 5341 } 5342 } 5343 5344 // Sanity check: make sure we never give data to the wrong app. This 5345 // should never happen but a little paranoia here won't go amiss. 5346 if (okay && !pkg.equals(mAgentPackage)) { 5347 Slog.e(TAG, "Restoring data for " + pkg 5348 + " but agent is for " + mAgentPackage); 5349 okay = false; 5350 } 5351 5352 // At this point we have an agent ready to handle the full 5353 // restore data as well as a pipe for sending data to 5354 // that agent. Tell the agent to start reading from the 5355 // pipe. 5356 if (okay) { 5357 boolean agentSuccess = true; 5358 long toCopy = info.size; 5359 final int token = generateToken(); 5360 try { 5361 prepareOperationTimeout(token, TIMEOUT_FULL_BACKUP_INTERVAL, null); 5362 if (info.domain.equals(FullBackup.OBB_TREE_TOKEN)) { 5363 if (DEBUG) Slog.d(TAG, "Restoring OBB file for " + pkg 5364 + " : " + info.path); 5365 mObbConnection.restoreObbFile(pkg, mPipes[0], 5366 info.size, info.type, info.path, info.mode, 5367 info.mtime, token, mBackupManagerBinder); 5368 } else { 5369 if (DEBUG) Slog.d(TAG, "Invoking agent to restore file " 5370 + info.path); 5371 // fire up the app's agent listening on the socket. If 5372 // the agent is running in the system process we can't 5373 // just invoke it asynchronously, so we provide a thread 5374 // for it here. 5375 if (mTargetApp.processName.equals("system")) { 5376 Slog.d(TAG, "system process agent - spinning a thread"); 5377 RestoreFileRunnable runner = new RestoreFileRunnable( 5378 mAgent, info, mPipes[0], token); 5379 new Thread(runner, "restore-sys-runner").start(); 5380 } else { 5381 mAgent.doRestoreFile(mPipes[0], info.size, info.type, 5382 info.domain, info.path, info.mode, info.mtime, 5383 token, mBackupManagerBinder); 5384 } 5385 } 5386 } catch (IOException e) { 5387 // couldn't dup the socket for a process-local restore 5388 Slog.d(TAG, "Couldn't establish restore"); 5389 agentSuccess = false; 5390 okay = false; 5391 } catch (RemoteException e) { 5392 // whoops, remote entity went away. We'll eat the content 5393 // ourselves, then, and not copy it over. 5394 Slog.e(TAG, "Agent crashed during full restore"); 5395 agentSuccess = false; 5396 okay = false; 5397 } 5398 5399 // Copy over the data if the agent is still good 5400 if (okay) { 5401 boolean pipeOkay = true; 5402 FileOutputStream pipe = new FileOutputStream( 5403 mPipes[1].getFileDescriptor()); 5404 while (toCopy > 0) { 5405 int toRead = (toCopy > buffer.length) 5406 ? buffer.length : (int)toCopy; 5407 int nRead = instream.read(buffer, 0, toRead); 5408 if (nRead >= 0) mBytes += nRead; 5409 if (nRead <= 0) break; 5410 toCopy -= nRead; 5411 5412 // send it to the output pipe as long as things 5413 // are still good 5414 if (pipeOkay) { 5415 try { 5416 pipe.write(buffer, 0, nRead); 5417 } catch (IOException e) { 5418 Slog.e(TAG, "Failed to write to restore pipe", e); 5419 pipeOkay = false; 5420 } 5421 } 5422 } 5423 5424 // done sending that file! Now we just need to consume 5425 // the delta from info.size to the end of block. 5426 skipTarPadding(info.size, instream); 5427 5428 // and now that we've sent it all, wait for the remote 5429 // side to acknowledge receipt 5430 agentSuccess = waitUntilOperationComplete(token); 5431 } 5432 5433 // okay, if the remote end failed at any point, deal with 5434 // it by ignoring the rest of the restore on it 5435 if (!agentSuccess) { 5436 mBackupHandler.removeMessages(MSG_TIMEOUT); 5437 tearDownPipes(); 5438 tearDownAgent(mTargetApp); 5439 mAgent = null; 5440 mPackagePolicies.put(pkg, RestorePolicy.IGNORE); 5441 } 5442 } 5443 5444 // Problems setting up the agent communication, or an already- 5445 // ignored package: skip to the next tar stream entry by 5446 // reading and discarding this file. 5447 if (!okay) { 5448 if (DEBUG) Slog.d(TAG, "[discarding file content]"); 5449 long bytesToConsume = (info.size + 511) & ~511; 5450 while (bytesToConsume > 0) { 5451 int toRead = (bytesToConsume > buffer.length) 5452 ? buffer.length : (int)bytesToConsume; 5453 long nRead = instream.read(buffer, 0, toRead); 5454 if (nRead >= 0) mBytes += nRead; 5455 if (nRead <= 0) break; 5456 bytesToConsume -= nRead; 5457 } 5458 } 5459 } 5460 } 5461 } catch (IOException e) { 5462 if (DEBUG) Slog.w(TAG, "io exception on restore socket read", e); 5463 // treat as EOF 5464 info = null; 5465 } 5466 5467 return (info != null); 5468 } 5469 5470 void setUpPipes() throws IOException { 5471 mPipes = ParcelFileDescriptor.createPipe(); 5472 } 5473 5474 void tearDownPipes() { 5475 if (mPipes != null) { 5476 try { 5477 mPipes[0].close(); 5478 mPipes[0] = null; 5479 mPipes[1].close(); 5480 mPipes[1] = null; 5481 } catch (IOException e) { 5482 Slog.w(TAG, "Couldn't close agent pipes", e); 5483 } 5484 mPipes = null; 5485 } 5486 } 5487 5488 void tearDownAgent(ApplicationInfo app) { 5489 if (mAgent != null) { 5490 try { 5491 // unbind and tidy up even on timeout or failure, just in case 5492 mActivityManager.unbindBackupAgent(app); 5493 5494 // The agent was running with a stub Application object, so shut it down. 5495 // !!! We hardcode the confirmation UI's package name here rather than use a 5496 // manifest flag! TODO something less direct. 5497 if (app.uid != Process.SYSTEM_UID 5498 && !app.packageName.equals("com.android.backupconfirm")) { 5499 if (DEBUG) Slog.d(TAG, "Killing host process"); 5500 mActivityManager.killApplicationProcess(app.processName, app.uid); 5501 } else { 5502 if (DEBUG) Slog.d(TAG, "Not killing after full restore"); 5503 } 5504 } catch (RemoteException e) { 5505 Slog.d(TAG, "Lost app trying to shut down"); 5506 } 5507 mAgent = null; 5508 } 5509 } 5510 5511 class RestoreInstallObserver extends IPackageInstallObserver.Stub { 5512 final AtomicBoolean mDone = new AtomicBoolean(); 5513 String mPackageName; 5514 int mResult; 5515 5516 public void reset() { 5517 synchronized (mDone) { 5518 mDone.set(false); 5519 } 5520 } 5521 5522 public void waitForCompletion() { 5523 synchronized (mDone) { 5524 while (mDone.get() == false) { 5525 try { 5526 mDone.wait(); 5527 } catch (InterruptedException e) { } 5528 } 5529 } 5530 } 5531 5532 int getResult() { 5533 return mResult; 5534 } 5535 5536 @Override 5537 public void packageInstalled(String packageName, int returnCode) 5538 throws RemoteException { 5539 synchronized (mDone) { 5540 mResult = returnCode; 5541 mPackageName = packageName; 5542 mDone.set(true); 5543 mDone.notifyAll(); 5544 } 5545 } 5546 } 5547 5548 class RestoreDeleteObserver extends IPackageDeleteObserver.Stub { 5549 final AtomicBoolean mDone = new AtomicBoolean(); 5550 int mResult; 5551 5552 public void reset() { 5553 synchronized (mDone) { 5554 mDone.set(false); 5555 } 5556 } 5557 5558 public void waitForCompletion() { 5559 synchronized (mDone) { 5560 while (mDone.get() == false) { 5561 try { 5562 mDone.wait(); 5563 } catch (InterruptedException e) { } 5564 } 5565 } 5566 } 5567 5568 @Override 5569 public void packageDeleted(String packageName, int returnCode) throws RemoteException { 5570 synchronized (mDone) { 5571 mResult = returnCode; 5572 mDone.set(true); 5573 mDone.notifyAll(); 5574 } 5575 } 5576 } 5577 5578 final RestoreInstallObserver mInstallObserver = new RestoreInstallObserver(); 5579 final RestoreDeleteObserver mDeleteObserver = new RestoreDeleteObserver(); 5580 5581 boolean installApk(FileMetadata info, String installerPackage, InputStream instream) { 5582 boolean okay = true; 5583 5584 if (DEBUG) Slog.d(TAG, "Installing from backup: " + info.packageName); 5585 5586 // The file content is an .apk file. Copy it out to a staging location and 5587 // attempt to install it. 5588 File apkFile = new File(mDataDir, info.packageName); 5589 try { 5590 FileOutputStream apkStream = new FileOutputStream(apkFile); 5591 byte[] buffer = new byte[32 * 1024]; 5592 long size = info.size; 5593 while (size > 0) { 5594 long toRead = (buffer.length < size) ? buffer.length : size; 5595 int didRead = instream.read(buffer, 0, (int)toRead); 5596 if (didRead >= 0) mBytes += didRead; 5597 apkStream.write(buffer, 0, didRead); 5598 size -= didRead; 5599 } 5600 apkStream.close(); 5601 5602 // make sure the installer can read it 5603 apkFile.setReadable(true, false); 5604 5605 // Now install it 5606 Uri packageUri = Uri.fromFile(apkFile); 5607 mInstallObserver.reset(); 5608 mPackageManager.installPackage(packageUri, mInstallObserver, 5609 PackageManager.INSTALL_REPLACE_EXISTING | PackageManager.INSTALL_FROM_ADB, 5610 installerPackage); 5611 mInstallObserver.waitForCompletion(); 5612 5613 if (mInstallObserver.getResult() != PackageManager.INSTALL_SUCCEEDED) { 5614 // The only time we continue to accept install of data even if the 5615 // apk install failed is if we had already determined that we could 5616 // accept the data regardless. 5617 if (mPackagePolicies.get(info.packageName) != RestorePolicy.ACCEPT) { 5618 okay = false; 5619 } 5620 } else { 5621 // Okay, the install succeeded. Make sure it was the right app. 5622 boolean uninstall = false; 5623 if (!mInstallObserver.mPackageName.equals(info.packageName)) { 5624 Slog.w(TAG, "Restore stream claimed to include apk for " 5625 + info.packageName + " but apk was really " 5626 + mInstallObserver.mPackageName); 5627 // delete the package we just put in place; it might be fraudulent 5628 okay = false; 5629 uninstall = true; 5630 } else { 5631 try { 5632 PackageInfo pkg = mPackageManager.getPackageInfo(info.packageName, 5633 PackageManager.GET_SIGNATURES); 5634 if ((pkg.applicationInfo.flags & ApplicationInfo.FLAG_ALLOW_BACKUP) == 0) { 5635 Slog.w(TAG, "Restore stream contains apk of package " 5636 + info.packageName + " but it disallows backup/restore"); 5637 okay = false; 5638 } else { 5639 // So far so good -- do the signatures match the manifest? 5640 Signature[] sigs = mManifestSignatures.get(info.packageName); 5641 if (signaturesMatch(sigs, pkg)) { 5642 // If this is a system-uid app without a declared backup agent, 5643 // don't restore any of the file data. 5644 if ((pkg.applicationInfo.uid < Process.FIRST_APPLICATION_UID) 5645 && (pkg.applicationInfo.backupAgentName == null)) { 5646 Slog.w(TAG, "Installed app " + info.packageName 5647 + " has restricted uid and no agent"); 5648 okay = false; 5649 } 5650 } else { 5651 Slog.w(TAG, "Installed app " + info.packageName 5652 + " signatures do not match restore manifest"); 5653 okay = false; 5654 uninstall = true; 5655 } 5656 } 5657 } catch (NameNotFoundException e) { 5658 Slog.w(TAG, "Install of package " + info.packageName 5659 + " succeeded but now not found"); 5660 okay = false; 5661 } 5662 } 5663 5664 // If we're not okay at this point, we need to delete the package 5665 // that we just installed. 5666 if (uninstall) { 5667 mDeleteObserver.reset(); 5668 mPackageManager.deletePackage(mInstallObserver.mPackageName, 5669 mDeleteObserver, 0); 5670 mDeleteObserver.waitForCompletion(); 5671 } 5672 } 5673 } catch (IOException e) { 5674 Slog.e(TAG, "Unable to transcribe restored apk for install"); 5675 okay = false; 5676 } finally { 5677 apkFile.delete(); 5678 } 5679 5680 return okay; 5681 } 5682 5683 // Given an actual file content size, consume the post-content padding mandated 5684 // by the tar format. 5685 void skipTarPadding(long size, InputStream instream) throws IOException { 5686 long partial = (size + 512) % 512; 5687 if (partial > 0) { 5688 final int needed = 512 - (int)partial; 5689 byte[] buffer = new byte[needed]; 5690 if (readExactly(instream, buffer, 0, needed) == needed) { 5691 mBytes += needed; 5692 } else throw new IOException("Unexpected EOF in padding"); 5693 } 5694 } 5695 5696 // Read a widget metadata file, returning the restored blob 5697 void readMetadata(FileMetadata info, InputStream instream) throws IOException { 5698 // Fail on suspiciously large widget dump files 5699 if (info.size > 64 * 1024) { 5700 throw new IOException("Metadata too big; corrupt? size=" + info.size); 5701 } 5702 5703 byte[] buffer = new byte[(int) info.size]; 5704 if (readExactly(instream, buffer, 0, (int)info.size) == info.size) { 5705 mBytes += info.size; 5706 } else throw new IOException("Unexpected EOF in widget data"); 5707 5708 String[] str = new String[1]; 5709 int offset = extractLine(buffer, 0, str); 5710 int version = Integer.parseInt(str[0]); 5711 if (version == BACKUP_MANIFEST_VERSION) { 5712 offset = extractLine(buffer, offset, str); 5713 final String pkg = str[0]; 5714 if (info.packageName.equals(pkg)) { 5715 // Data checks out -- the rest of the buffer is a concatenation of 5716 // binary blobs as described in the comment at writeAppWidgetData() 5717 ByteArrayInputStream bin = new ByteArrayInputStream(buffer, 5718 offset, buffer.length - offset); 5719 DataInputStream in = new DataInputStream(bin); 5720 while (bin.available() > 0) { 5721 int token = in.readInt(); 5722 int size = in.readInt(); 5723 if (size > 64 * 1024) { 5724 throw new IOException("Datum " 5725 + Integer.toHexString(token) 5726 + " too big; corrupt? size=" + info.size); 5727 } 5728 switch (token) { 5729 case BACKUP_WIDGET_METADATA_TOKEN: 5730 { 5731 if (MORE_DEBUG) { 5732 Slog.i(TAG, "Got widget metadata for " + info.packageName); 5733 } 5734 mWidgetData = new byte[size]; 5735 in.read(mWidgetData); 5736 break; 5737 } 5738 default: 5739 { 5740 if (DEBUG) { 5741 Slog.i(TAG, "Ignoring metadata blob " 5742 + Integer.toHexString(token) 5743 + " for " + info.packageName); 5744 } 5745 in.skipBytes(size); 5746 break; 5747 } 5748 } 5749 } 5750 } else { 5751 Slog.w(TAG, "Metadata mismatch: package " + info.packageName 5752 + " but widget data for " + pkg); 5753 } 5754 } else { 5755 Slog.w(TAG, "Unsupported metadata version " + version); 5756 } 5757 } 5758 5759 // Returns a policy constant; takes a buffer arg to reduce memory churn 5760 RestorePolicy readAppManifest(FileMetadata info, InputStream instream) 5761 throws IOException { 5762 // Fail on suspiciously large manifest files 5763 if (info.size > 64 * 1024) { 5764 throw new IOException("Restore manifest too big; corrupt? size=" + info.size); 5765 } 5766 5767 byte[] buffer = new byte[(int) info.size]; 5768 if (readExactly(instream, buffer, 0, (int)info.size) == info.size) { 5769 mBytes += info.size; 5770 } else throw new IOException("Unexpected EOF in manifest"); 5771 5772 RestorePolicy policy = RestorePolicy.IGNORE; 5773 String[] str = new String[1]; 5774 int offset = 0; 5775 5776 try { 5777 offset = extractLine(buffer, offset, str); 5778 int version = Integer.parseInt(str[0]); 5779 if (version == BACKUP_MANIFEST_VERSION) { 5780 offset = extractLine(buffer, offset, str); 5781 String manifestPackage = str[0]; 5782 // TODO: handle <original-package> 5783 if (manifestPackage.equals(info.packageName)) { 5784 offset = extractLine(buffer, offset, str); 5785 version = Integer.parseInt(str[0]); // app version 5786 offset = extractLine(buffer, offset, str); 5787 int platformVersion = Integer.parseInt(str[0]); 5788 offset = extractLine(buffer, offset, str); 5789 info.installerPackageName = (str[0].length() > 0) ? str[0] : null; 5790 offset = extractLine(buffer, offset, str); 5791 boolean hasApk = str[0].equals("1"); 5792 offset = extractLine(buffer, offset, str); 5793 int numSigs = Integer.parseInt(str[0]); 5794 if (numSigs > 0) { 5795 Signature[] sigs = new Signature[numSigs]; 5796 for (int i = 0; i < numSigs; i++) { 5797 offset = extractLine(buffer, offset, str); 5798 sigs[i] = new Signature(str[0]); 5799 } 5800 mManifestSignatures.put(info.packageName, sigs); 5801 5802 // Okay, got the manifest info we need... 5803 try { 5804 PackageInfo pkgInfo = mPackageManager.getPackageInfo( 5805 info.packageName, PackageManager.GET_SIGNATURES); 5806 // Fall through to IGNORE if the app explicitly disallows backup 5807 final int flags = pkgInfo.applicationInfo.flags; 5808 if ((flags & ApplicationInfo.FLAG_ALLOW_BACKUP) != 0) { 5809 // Restore system-uid-space packages only if they have 5810 // defined a custom backup agent 5811 if ((pkgInfo.applicationInfo.uid >= Process.FIRST_APPLICATION_UID) 5812 || (pkgInfo.applicationInfo.backupAgentName != null)) { 5813 // Verify signatures against any installed version; if they 5814 // don't match, then we fall though and ignore the data. The 5815 // signatureMatch() method explicitly ignores the signature 5816 // check for packages installed on the system partition, because 5817 // such packages are signed with the platform cert instead of 5818 // the app developer's cert, so they're different on every 5819 // device. 5820 if (signaturesMatch(sigs, pkgInfo)) { 5821 if (pkgInfo.versionCode >= version) { 5822 Slog.i(TAG, "Sig + version match; taking data"); 5823 policy = RestorePolicy.ACCEPT; 5824 } else { 5825 // The data is from a newer version of the app than 5826 // is presently installed. That means we can only 5827 // use it if the matching apk is also supplied. 5828 Slog.d(TAG, "Data version " + version 5829 + " is newer than installed version " 5830 + pkgInfo.versionCode + " - requiring apk"); 5831 policy = RestorePolicy.ACCEPT_IF_APK; 5832 } 5833 } else { 5834 Slog.w(TAG, "Restore manifest signatures do not match " 5835 + "installed application for " + info.packageName); 5836 } 5837 } else { 5838 Slog.w(TAG, "Package " + info.packageName 5839 + " is system level with no agent"); 5840 } 5841 } else { 5842 if (DEBUG) Slog.i(TAG, "Restore manifest from " 5843 + info.packageName + " but allowBackup=false"); 5844 } 5845 } catch (NameNotFoundException e) { 5846 // Okay, the target app isn't installed. We can process 5847 // the restore properly only if the dataset provides the 5848 // apk file and we can successfully install it. 5849 if (DEBUG) Slog.i(TAG, "Package " + info.packageName 5850 + " not installed; requiring apk in dataset"); 5851 policy = RestorePolicy.ACCEPT_IF_APK; 5852 } 5853 5854 if (policy == RestorePolicy.ACCEPT_IF_APK && !hasApk) { 5855 Slog.i(TAG, "Cannot restore package " + info.packageName 5856 + " without the matching .apk"); 5857 } 5858 } else { 5859 Slog.i(TAG, "Missing signature on backed-up package " 5860 + info.packageName); 5861 } 5862 } else { 5863 Slog.i(TAG, "Expected package " + info.packageName 5864 + " but restore manifest claims " + manifestPackage); 5865 } 5866 } else { 5867 Slog.i(TAG, "Unknown restore manifest version " + version 5868 + " for package " + info.packageName); 5869 } 5870 } catch (NumberFormatException e) { 5871 Slog.w(TAG, "Corrupt restore manifest for package " + info.packageName); 5872 } catch (IllegalArgumentException e) { 5873 Slog.w(TAG, e.getMessage()); 5874 } 5875 5876 return policy; 5877 } 5878 5879 // Builds a line from a byte buffer starting at 'offset', and returns 5880 // the index of the next unconsumed data in the buffer. 5881 int extractLine(byte[] buffer, int offset, String[] outStr) throws IOException { 5882 final int end = buffer.length; 5883 if (offset >= end) throw new IOException("Incomplete data"); 5884 5885 int pos; 5886 for (pos = offset; pos < end; pos++) { 5887 byte c = buffer[pos]; 5888 // at LF we declare end of line, and return the next char as the 5889 // starting point for the next time through 5890 if (c == '\n') { 5891 break; 5892 } 5893 } 5894 outStr[0] = new String(buffer, offset, pos - offset); 5895 pos++; // may be pointing an extra byte past the end but that's okay 5896 return pos; 5897 } 5898 5899 void dumpFileMetadata(FileMetadata info) { 5900 if (DEBUG) { 5901 StringBuilder b = new StringBuilder(128); 5902 5903 // mode string 5904 b.append((info.type == BackupAgent.TYPE_DIRECTORY) ? 'd' : '-'); 5905 b.append(((info.mode & 0400) != 0) ? 'r' : '-'); 5906 b.append(((info.mode & 0200) != 0) ? 'w' : '-'); 5907 b.append(((info.mode & 0100) != 0) ? 'x' : '-'); 5908 b.append(((info.mode & 0040) != 0) ? 'r' : '-'); 5909 b.append(((info.mode & 0020) != 0) ? 'w' : '-'); 5910 b.append(((info.mode & 0010) != 0) ? 'x' : '-'); 5911 b.append(((info.mode & 0004) != 0) ? 'r' : '-'); 5912 b.append(((info.mode & 0002) != 0) ? 'w' : '-'); 5913 b.append(((info.mode & 0001) != 0) ? 'x' : '-'); 5914 b.append(String.format(" %9d ", info.size)); 5915 5916 Date stamp = new Date(info.mtime); 5917 b.append(new SimpleDateFormat("MMM dd HH:mm:ss ").format(stamp)); 5918 5919 b.append(info.packageName); 5920 b.append(" :: "); 5921 b.append(info.domain); 5922 b.append(" :: "); 5923 b.append(info.path); 5924 5925 Slog.i(TAG, b.toString()); 5926 } 5927 } 5928 // Consume a tar file header block [sequence] and accumulate the relevant metadata 5929 FileMetadata readTarHeaders(InputStream instream) throws IOException { 5930 byte[] block = new byte[512]; 5931 FileMetadata info = null; 5932 5933 boolean gotHeader = readTarHeader(instream, block); 5934 if (gotHeader) { 5935 try { 5936 // okay, presume we're okay, and extract the various metadata 5937 info = new FileMetadata(); 5938 info.size = extractRadix(block, 124, 12, 8); 5939 info.mtime = extractRadix(block, 136, 12, 8); 5940 info.mode = extractRadix(block, 100, 8, 8); 5941 5942 info.path = extractString(block, 345, 155); // prefix 5943 String path = extractString(block, 0, 100); 5944 if (path.length() > 0) { 5945 if (info.path.length() > 0) info.path += '/'; 5946 info.path += path; 5947 } 5948 5949 // tar link indicator field: 1 byte at offset 156 in the header. 5950 int typeChar = block[156]; 5951 if (typeChar == 'x') { 5952 // pax extended header, so we need to read that 5953 gotHeader = readPaxExtendedHeader(instream, info); 5954 if (gotHeader) { 5955 // and after a pax extended header comes another real header -- read 5956 // that to find the real file type 5957 gotHeader = readTarHeader(instream, block); 5958 } 5959 if (!gotHeader) throw new IOException("Bad or missing pax header"); 5960 5961 typeChar = block[156]; 5962 } 5963 5964 switch (typeChar) { 5965 case '0': info.type = BackupAgent.TYPE_FILE; break; 5966 case '5': { 5967 info.type = BackupAgent.TYPE_DIRECTORY; 5968 if (info.size != 0) { 5969 Slog.w(TAG, "Directory entry with nonzero size in header"); 5970 info.size = 0; 5971 } 5972 break; 5973 } 5974 case 0: { 5975 // presume EOF 5976 if (DEBUG) Slog.w(TAG, "Saw type=0 in tar header block, info=" + info); 5977 return null; 5978 } 5979 default: { 5980 Slog.e(TAG, "Unknown tar entity type: " + typeChar); 5981 throw new IOException("Unknown entity type " + typeChar); 5982 } 5983 } 5984 5985 // Parse out the path 5986 // 5987 // first: apps/shared/unrecognized 5988 if (FullBackup.SHARED_PREFIX.regionMatches(0, 5989 info.path, 0, FullBackup.SHARED_PREFIX.length())) { 5990 // File in shared storage. !!! TODO: implement this. 5991 info.path = info.path.substring(FullBackup.SHARED_PREFIX.length()); 5992 info.packageName = SHARED_BACKUP_AGENT_PACKAGE; 5993 info.domain = FullBackup.SHARED_STORAGE_TOKEN; 5994 if (DEBUG) Slog.i(TAG, "File in shared storage: " + info.path); 5995 } else if (FullBackup.APPS_PREFIX.regionMatches(0, 5996 info.path, 0, FullBackup.APPS_PREFIX.length())) { 5997 // App content! Parse out the package name and domain 5998 5999 // strip the apps/ prefix 6000 info.path = info.path.substring(FullBackup.APPS_PREFIX.length()); 6001 6002 // extract the package name 6003 int slash = info.path.indexOf('/'); 6004 if (slash < 0) throw new IOException("Illegal semantic path in " + info.path); 6005 info.packageName = info.path.substring(0, slash); 6006 info.path = info.path.substring(slash+1); 6007 6008 // if it's a manifest we're done, otherwise parse out the domains 6009 if (!info.path.equals(BACKUP_MANIFEST_FILENAME)) { 6010 slash = info.path.indexOf('/'); 6011 if (slash < 0) throw new IOException("Illegal semantic path in non-manifest " + info.path); 6012 info.domain = info.path.substring(0, slash); 6013 info.path = info.path.substring(slash + 1); 6014 } 6015 } 6016 } catch (IOException e) { 6017 if (DEBUG) { 6018 Slog.e(TAG, "Parse error in header: " + e.getMessage()); 6019 HEXLOG(block); 6020 } 6021 throw e; 6022 } 6023 } 6024 return info; 6025 } 6026 6027 private void HEXLOG(byte[] block) { 6028 int offset = 0; 6029 int todo = block.length; 6030 StringBuilder buf = new StringBuilder(64); 6031 while (todo > 0) { 6032 buf.append(String.format("%04x ", offset)); 6033 int numThisLine = (todo > 16) ? 16 : todo; 6034 for (int i = 0; i < numThisLine; i++) { 6035 buf.append(String.format("%02x ", block[offset+i])); 6036 } 6037 Slog.i("hexdump", buf.toString()); 6038 buf.setLength(0); 6039 todo -= numThisLine; 6040 offset += numThisLine; 6041 } 6042 } 6043 6044 // Read exactly the given number of bytes into a buffer at the stated offset. 6045 // Returns false if EOF is encountered before the requested number of bytes 6046 // could be read. 6047 int readExactly(InputStream in, byte[] buffer, int offset, int size) 6048 throws IOException { 6049 if (size <= 0) throw new IllegalArgumentException("size must be > 0"); 6050 6051 int soFar = 0; 6052 while (soFar < size) { 6053 int nRead = in.read(buffer, offset + soFar, size - soFar); 6054 if (nRead <= 0) { 6055 if (MORE_DEBUG) Slog.w(TAG, "- wanted exactly " + size + " but got only " + soFar); 6056 break; 6057 } 6058 soFar += nRead; 6059 } 6060 return soFar; 6061 } 6062 6063 boolean readTarHeader(InputStream instream, byte[] block) throws IOException { 6064 final int got = readExactly(instream, block, 0, 512); 6065 if (got == 0) return false; // Clean EOF 6066 if (got < 512) throw new IOException("Unable to read full block header"); 6067 mBytes += 512; 6068 return true; 6069 } 6070 6071 // overwrites 'info' fields based on the pax extended header 6072 boolean readPaxExtendedHeader(InputStream instream, FileMetadata info) 6073 throws IOException { 6074 // We should never see a pax extended header larger than this 6075 if (info.size > 32*1024) { 6076 Slog.w(TAG, "Suspiciously large pax header size " + info.size 6077 + " - aborting"); 6078 throw new IOException("Sanity failure: pax header size " + info.size); 6079 } 6080 6081 // read whole blocks, not just the content size 6082 int numBlocks = (int)((info.size + 511) >> 9); 6083 byte[] data = new byte[numBlocks * 512]; 6084 if (readExactly(instream, data, 0, data.length) < data.length) { 6085 throw new IOException("Unable to read full pax header"); 6086 } 6087 mBytes += data.length; 6088 6089 final int contentSize = (int) info.size; 6090 int offset = 0; 6091 do { 6092 // extract the line at 'offset' 6093 int eol = offset+1; 6094 while (eol < contentSize && data[eol] != ' ') eol++; 6095 if (eol >= contentSize) { 6096 // error: we just hit EOD looking for the end of the size field 6097 throw new IOException("Invalid pax data"); 6098 } 6099 // eol points to the space between the count and the key 6100 int linelen = (int) extractRadix(data, offset, eol - offset, 10); 6101 int key = eol + 1; // start of key=value 6102 eol = offset + linelen - 1; // trailing LF 6103 int value; 6104 for (value = key+1; data[value] != '=' && value <= eol; value++); 6105 if (value > eol) { 6106 throw new IOException("Invalid pax declaration"); 6107 } 6108 6109 // pax requires that key/value strings be in UTF-8 6110 String keyStr = new String(data, key, value-key, "UTF-8"); 6111 // -1 to strip the trailing LF 6112 String valStr = new String(data, value+1, eol-value-1, "UTF-8"); 6113 6114 if ("path".equals(keyStr)) { 6115 info.path = valStr; 6116 } else if ("size".equals(keyStr)) { 6117 info.size = Long.parseLong(valStr); 6118 } else { 6119 if (DEBUG) Slog.i(TAG, "Unhandled pax key: " + key); 6120 } 6121 6122 offset += linelen; 6123 } while (offset < contentSize); 6124 6125 return true; 6126 } 6127 6128 long extractRadix(byte[] data, int offset, int maxChars, int radix) 6129 throws IOException { 6130 long value = 0; 6131 final int end = offset + maxChars; 6132 for (int i = offset; i < end; i++) { 6133 final byte b = data[i]; 6134 // Numeric fields in tar can terminate with either NUL or SPC 6135 if (b == 0 || b == ' ') break; 6136 if (b < '0' || b > ('0' + radix - 1)) { 6137 throw new IOException("Invalid number in header: '" + (char)b + "' for radix " + radix); 6138 } 6139 value = radix * value + (b - '0'); 6140 } 6141 return value; 6142 } 6143 6144 String extractString(byte[] data, int offset, int maxChars) throws IOException { 6145 final int end = offset + maxChars; 6146 int eos = offset; 6147 // tar string fields terminate early with a NUL 6148 while (eos < end && data[eos] != 0) eos++; 6149 return new String(data, offset, eos-offset, "US-ASCII"); 6150 } 6151 6152 void sendStartRestore() { 6153 if (mObserver != null) { 6154 try { 6155 mObserver.onStartRestore(); 6156 } catch (RemoteException e) { 6157 Slog.w(TAG, "full restore observer went away: startRestore"); 6158 mObserver = null; 6159 } 6160 } 6161 } 6162 6163 void sendOnRestorePackage(String name) { 6164 if (mObserver != null) { 6165 try { 6166 // TODO: use a more user-friendly name string 6167 mObserver.onRestorePackage(name); 6168 } catch (RemoteException e) { 6169 Slog.w(TAG, "full restore observer went away: restorePackage"); 6170 mObserver = null; 6171 } 6172 } 6173 } 6174 6175 void sendEndRestore() { 6176 if (mObserver != null) { 6177 try { 6178 mObserver.onEndRestore(); 6179 } catch (RemoteException e) { 6180 Slog.w(TAG, "full restore observer went away: endRestore"); 6181 mObserver = null; 6182 } 6183 } 6184 } 6185 } 6186 6187 // ----- Restore handling ----- 6188 6189 // new style: we only store the SHA-1 hashes of each sig, not the full block 6190 static boolean signaturesMatch(ArrayList<byte[]> storedSigHashes, PackageInfo target) { 6191 if (target == null) { 6192 return false; 6193 } 6194 6195 // If the target resides on the system partition, we allow it to restore 6196 // data from the like-named package in a restore set even if the signatures 6197 // do not match. (Unlike general applications, those flashed to the system 6198 // partition will be signed with the device's platform certificate, so on 6199 // different phones the same system app will have different signatures.) 6200 if ((target.applicationInfo.flags & ApplicationInfo.FLAG_SYSTEM) != 0) { 6201 if (DEBUG) Slog.v(TAG, "System app " + target.packageName + " - skipping sig check"); 6202 return true; 6203 } 6204 6205 // Allow unsigned apps, but not signed on one device and unsigned on the other 6206 // !!! TODO: is this the right policy? 6207 Signature[] deviceSigs = target.signatures; 6208 if (MORE_DEBUG) Slog.v(TAG, "signaturesMatch(): stored=" + storedSigHashes 6209 + " device=" + deviceSigs); 6210 if ((storedSigHashes == null || storedSigHashes.size() == 0) 6211 && (deviceSigs == null || deviceSigs.length == 0)) { 6212 return true; 6213 } 6214 if (storedSigHashes == null || deviceSigs == null) { 6215 return false; 6216 } 6217 6218 // !!! TODO: this demands that every stored signature match one 6219 // that is present on device, and does not demand the converse. 6220 // Is this this right policy? 6221 final int nStored = storedSigHashes.size(); 6222 final int nDevice = deviceSigs.length; 6223 6224 // hash each on-device signature 6225 ArrayList<byte[]> deviceHashes = new ArrayList<byte[]>(nDevice); 6226 for (int i = 0; i < nDevice; i++) { 6227 deviceHashes.add(hashSignature(deviceSigs[i])); 6228 } 6229 6230 // now ensure that each stored sig (hash) matches an on-device sig (hash) 6231 for (int n = 0; n < nStored; n++) { 6232 boolean match = false; 6233 final byte[] storedHash = storedSigHashes.get(n); 6234 for (int i = 0; i < nDevice; i++) { 6235 if (Arrays.equals(storedHash, deviceHashes.get(i))) { 6236 match = true; 6237 break; 6238 } 6239 } 6240 // match is false when no on-device sig matched one of the stored ones 6241 if (!match) { 6242 return false; 6243 } 6244 } 6245 6246 return true; 6247 } 6248 6249 static byte[] hashSignature(Signature sig) { 6250 try { 6251 MessageDigest digest = MessageDigest.getInstance("SHA-256"); 6252 digest.update(sig.toByteArray()); 6253 return digest.digest(); 6254 } catch (NoSuchAlgorithmException e) { 6255 Slog.w(TAG, "No SHA-256 algorithm found!"); 6256 } 6257 return null; 6258 } 6259 6260 // Old style: directly match the stored vs on device signature blocks 6261 static boolean signaturesMatch(Signature[] storedSigs, PackageInfo target) { 6262 if (target == null) { 6263 return false; 6264 } 6265 6266 // If the target resides on the system partition, we allow it to restore 6267 // data from the like-named package in a restore set even if the signatures 6268 // do not match. (Unlike general applications, those flashed to the system 6269 // partition will be signed with the device's platform certificate, so on 6270 // different phones the same system app will have different signatures.) 6271 if ((target.applicationInfo.flags & ApplicationInfo.FLAG_SYSTEM) != 0) { 6272 if (DEBUG) Slog.v(TAG, "System app " + target.packageName + " - skipping sig check"); 6273 return true; 6274 } 6275 6276 // Allow unsigned apps, but not signed on one device and unsigned on the other 6277 // !!! TODO: is this the right policy? 6278 Signature[] deviceSigs = target.signatures; 6279 if (MORE_DEBUG) Slog.v(TAG, "signaturesMatch(): stored=" + storedSigs 6280 + " device=" + deviceSigs); 6281 if ((storedSigs == null || storedSigs.length == 0) 6282 && (deviceSigs == null || deviceSigs.length == 0)) { 6283 return true; 6284 } 6285 if (storedSigs == null || deviceSigs == null) { 6286 return false; 6287 } 6288 6289 // !!! TODO: this demands that every stored signature match one 6290 // that is present on device, and does not demand the converse. 6291 // Is this this right policy? 6292 int nStored = storedSigs.length; 6293 int nDevice = deviceSigs.length; 6294 6295 for (int i=0; i < nStored; i++) { 6296 boolean match = false; 6297 for (int j=0; j < nDevice; j++) { 6298 if (storedSigs[i].equals(deviceSigs[j])) { 6299 match = true; 6300 break; 6301 } 6302 } 6303 if (!match) { 6304 return false; 6305 } 6306 } 6307 return true; 6308 } 6309 6310 // Used by both incremental and full restore 6311 void restoreWidgetData(String packageName, byte[] widgetData) { 6312 // Apply the restored widget state and generate the ID update for the app 6313 AppWidgetBackupBridge.restoreWidgetState(packageName, widgetData, UserHandle.USER_OWNER); 6314 } 6315 6316 // ***************************** 6317 // NEW UNIFIED RESTORE IMPLEMENTATION 6318 // ***************************** 6319 6320 // states of the unified-restore state machine 6321 enum UnifiedRestoreState { 6322 INITIAL, 6323 RUNNING_QUEUE, 6324 RESTORE_KEYVALUE, 6325 RESTORE_FULL, 6326 RESTORE_FINISHED, 6327 FINAL 6328 } 6329 6330 class PerformUnifiedRestoreTask implements BackupRestoreTask { 6331 // Transport we're working with to do the restore 6332 private IBackupTransport mTransport; 6333 6334 // Where per-transport saved state goes 6335 File mStateDir; 6336 6337 // Restore observer; may be null 6338 private IRestoreObserver mObserver; 6339 6340 // Token identifying the dataset to the transport 6341 private long mToken; 6342 6343 // When this is a restore-during-install, this is the token identifying the 6344 // operation to the Package Manager, and we must ensure that we let it know 6345 // when we're finished. 6346 private int mPmToken; 6347 6348 // Is this a whole-system restore, i.e. are we establishing a new ancestral 6349 // dataset to base future restore-at-install operations from? 6350 private boolean mIsSystemRestore; 6351 6352 // If this is a single-package restore, what package are we interested in? 6353 private PackageInfo mTargetPackage; 6354 6355 // In all cases, the calculated list of packages that we are trying to restore 6356 private List<PackageInfo> mAcceptSet; 6357 6358 // Our bookkeeping about the ancestral dataset 6359 private PackageManagerBackupAgent mPmAgent; 6360 6361 // Currently-bound backup agent for restore + restoreFinished purposes 6362 private IBackupAgent mAgent; 6363 6364 // What sort of restore we're doing now 6365 private RestoreDescription mRestoreDescription; 6366 6367 // The package we're currently restoring 6368 private PackageInfo mCurrentPackage; 6369 6370 // Widget-related data handled as part of this restore operation 6371 private byte[] mWidgetData; 6372 6373 // Number of apps restored in this pass 6374 private int mCount; 6375 6376 // When did we start? 6377 private long mStartRealtime; 6378 6379 // State machine progress 6380 private UnifiedRestoreState mState; 6381 6382 // How are things going? 6383 private int mStatus; 6384 6385 // Done? 6386 private boolean mFinished; 6387 6388 // Key/value: bookkeeping about staged data and files for agent access 6389 private File mBackupDataName; 6390 private File mStageName; 6391 private File mSavedStateName; 6392 private File mNewStateName; 6393 ParcelFileDescriptor mBackupData; 6394 ParcelFileDescriptor mNewState; 6395 6396 // Invariant: mWakelock is already held, and this task is responsible for 6397 // releasing it at the end of the restore operation. 6398 PerformUnifiedRestoreTask(IBackupTransport transport, IRestoreObserver observer, 6399 long restoreSetToken, PackageInfo targetPackage, int pmToken, 6400 boolean isFullSystemRestore, String[] filterSet) { 6401 mState = UnifiedRestoreState.INITIAL; 6402 mStartRealtime = SystemClock.elapsedRealtime(); 6403 6404 mTransport = transport; 6405 mObserver = observer; 6406 mToken = restoreSetToken; 6407 mPmToken = pmToken; 6408 mTargetPackage = targetPackage; 6409 mIsSystemRestore = isFullSystemRestore; 6410 mFinished = false; 6411 6412 if (filterSet == null) { 6413 // We want everything and a pony 6414 List<PackageInfo> apps 6415 = PackageManagerBackupAgent.getStorableApplications(mPackageManager); 6416 filterSet = packagesToNames(apps); 6417 if (DEBUG) { 6418 Slog.i(TAG, "Full restore; asking for " + filterSet.length + " apps"); 6419 } 6420 } 6421 6422 mAcceptSet = new ArrayList<PackageInfo>(filterSet.length); 6423 6424 // Pro tem, we insist on moving the settings provider package to last place. 6425 // Keep track of whether it's in the list, and bump it down if so. We also 6426 // want to do the system package itself first if it's called for. 6427 boolean hasSystem = false; 6428 boolean hasSettings = false; 6429 for (int i = 0; i < filterSet.length; i++) { 6430 try { 6431 PackageInfo info = mPackageManager.getPackageInfo(filterSet[i], 0); 6432 if ("android".equals(info.packageName)) { 6433 hasSystem = true; 6434 continue; 6435 } 6436 if (SETTINGS_PACKAGE.equals(info.packageName)) { 6437 hasSettings = true; 6438 continue; 6439 } 6440 6441 if (appIsEligibleForBackup(info.applicationInfo)) { 6442 mAcceptSet.add(info); 6443 } 6444 } catch (NameNotFoundException e) { 6445 // requested package name doesn't exist; ignore it 6446 } 6447 } 6448 if (hasSystem) { 6449 try { 6450 mAcceptSet.add(0, mPackageManager.getPackageInfo("android", 0)); 6451 } catch (NameNotFoundException e) { 6452 // won't happen; we know a priori that it's valid 6453 } 6454 } 6455 if (hasSettings) { 6456 try { 6457 mAcceptSet.add(mPackageManager.getPackageInfo(SETTINGS_PACKAGE, 0)); 6458 } catch (NameNotFoundException e) { 6459 // this one is always valid too 6460 } 6461 } 6462 6463 if (MORE_DEBUG) { 6464 Slog.v(TAG, "Restore; accept set size is " + mAcceptSet.size()); 6465 for (PackageInfo info : mAcceptSet) { 6466 Slog.v(TAG, " " + info.packageName); 6467 } 6468 } 6469 } 6470 6471 private String[] packagesToNames(List<PackageInfo> apps) { 6472 final int N = apps.size(); 6473 String[] names = new String[N]; 6474 for (int i = 0; i < N; i++) { 6475 names[i] = apps.get(i).packageName; 6476 } 6477 return names; 6478 } 6479 6480 // Execute one tick of whatever state machine the task implements 6481 @Override 6482 public void execute() { 6483 if (MORE_DEBUG) Slog.v(TAG, "*** Executing restore step " + mState); 6484 switch (mState) { 6485 case INITIAL: 6486 startRestore(); 6487 break; 6488 6489 case RUNNING_QUEUE: 6490 dispatchNextRestore(); 6491 break; 6492 6493 case RESTORE_KEYVALUE: 6494 restoreKeyValue(); 6495 break; 6496 6497 case RESTORE_FULL: 6498 restoreFull(); 6499 break; 6500 6501 case RESTORE_FINISHED: 6502 restoreFinished(); 6503 break; 6504 6505 case FINAL: 6506 if (!mFinished) finalizeRestore(); 6507 else { 6508 Slog.e(TAG, "Duplicate finish"); 6509 } 6510 mFinished = true; 6511 break; 6512 } 6513 } 6514 6515 /* 6516 * SKETCH OF OPERATION 6517 * 6518 * create one of these PerformUnifiedRestoreTask objects, telling it which 6519 * dataset & transport to address, and then parameters within the restore 6520 * operation: single target package vs many, etc. 6521 * 6522 * 1. transport.startRestore(token, list-of-packages). If we need @pm@ it is 6523 * always placed first and the settings provider always placed last [for now]. 6524 * 6525 * 1a [if we needed @pm@ then nextRestorePackage() and restore the PMBA inline] 6526 * 6527 * [ state change => RUNNING_QUEUE ] 6528 * 6529 * NOW ITERATE: 6530 * 6531 * { 3. t.nextRestorePackage() 6532 * 4. does the metadata for this package allow us to restore it? 6533 * does the on-disk app permit us to restore it? [re-check allowBackup etc] 6534 * 5. is this a key/value dataset? => key/value agent restore 6535 * [ state change => RESTORE_KEYVALUE ] 6536 * 5a. spin up agent 6537 * 5b. t.getRestoreData() to stage it properly 6538 * 5c. call into agent to perform restore 6539 * 5d. tear down agent 6540 * [ state change => RUNNING_QUEUE ] 6541 * 6542 * 6. else it's a stream dataset: 6543 * [ state change => RESTORE_FULL ] 6544 * 6a. instantiate the engine for a stream restore: engine handles agent lifecycles 6545 * 6b. spin off engine runner on separate thread 6546 * 6c. ITERATE getNextFullRestoreDataChunk() and copy data to engine runner socket 6547 * [ state change => RUNNING_QUEUE ] 6548 * } 6549 * 6550 * [ state change => FINAL ] 6551 * 6552 * 7. t.finishRestore(), release wakelock, etc. 6553 * 6554 * 6555 */ 6556 6557 // state INITIAL : set up for the restore and read the metadata if necessary 6558 private void startRestore() { 6559 sendStartRestore(mAcceptSet.size()); 6560 6561 try { 6562 String transportDir = mTransport.transportDirName(); 6563 mStateDir = new File(mBaseStateDir, transportDir); 6564 6565 // Fetch the current metadata from the dataset first 6566 PackageInfo pmPackage = new PackageInfo(); 6567 pmPackage.packageName = PACKAGE_MANAGER_SENTINEL; 6568 mAcceptSet.add(0, pmPackage); 6569 6570 PackageInfo[] packages = mAcceptSet.toArray(new PackageInfo[0]); 6571 mStatus = mTransport.startRestore(mToken, packages); 6572 if (mStatus != BackupTransport.TRANSPORT_OK) { 6573 Slog.e(TAG, "Transport error " + mStatus + "; no restore possible"); 6574 mStatus = BackupTransport.TRANSPORT_ERROR; 6575 executeNextState(UnifiedRestoreState.FINAL); 6576 return; 6577 } 6578 6579 RestoreDescription desc = mTransport.nextRestorePackage(); 6580 if (desc == null) { 6581 Slog.e(TAG, "No restore metadata available; halting"); 6582 mStatus = BackupTransport.TRANSPORT_ERROR; 6583 executeNextState(UnifiedRestoreState.FINAL); 6584 return; 6585 } 6586 if (!PACKAGE_MANAGER_SENTINEL.equals(desc.getPackageName())) { 6587 Slog.e(TAG, "Required metadata but got " + desc.getPackageName()); 6588 mStatus = BackupTransport.TRANSPORT_ERROR; 6589 executeNextState(UnifiedRestoreState.FINAL); 6590 return; 6591 } 6592 6593 // Pull the Package Manager metadata from the restore set first 6594 mCurrentPackage = new PackageInfo(); 6595 mCurrentPackage.packageName = PACKAGE_MANAGER_SENTINEL; 6596 mPmAgent = new PackageManagerBackupAgent(mPackageManager, null); 6597 mAgent = IBackupAgent.Stub.asInterface(mPmAgent.onBind()); 6598 if (MORE_DEBUG) { 6599 Slog.v(TAG, "initiating restore for PMBA"); 6600 } 6601 initiateOneRestore(mCurrentPackage, 0); 6602 // The PM agent called operationComplete() already, because our invocation 6603 // of it is process-local and therefore synchronous. That means that the 6604 // next-state message (RUNNING_QUEUE) is already enqueued. Only if we're 6605 // unable to proceed with running the queue do we remove that pending 6606 // message and jump straight to the FINAL state. 6607 6608 // Verify that the backup set includes metadata. If not, we can't do 6609 // signature/version verification etc, so we simply do not proceed with 6610 // the restore operation. 6611 if (!mPmAgent.hasMetadata()) { 6612 Slog.e(TAG, "No restore metadata available, so not restoring"); 6613 EventLog.writeEvent(EventLogTags.RESTORE_AGENT_FAILURE, 6614 PACKAGE_MANAGER_SENTINEL, 6615 "Package manager restore metadata missing"); 6616 mStatus = BackupTransport.TRANSPORT_ERROR; 6617 mBackupHandler.removeMessages(MSG_BACKUP_RESTORE_STEP, this); 6618 executeNextState(UnifiedRestoreState.FINAL); 6619 return; 6620 } 6621 6622 // Success; cache the metadata and continue as expected with the 6623 // next state already enqueued 6624 6625 } catch (RemoteException e) { 6626 // If we lost the transport at any time, halt 6627 Slog.e(TAG, "Unable to contact transport for restore"); 6628 mStatus = BackupTransport.TRANSPORT_ERROR; 6629 mBackupHandler.removeMessages(MSG_BACKUP_RESTORE_STEP, this); 6630 executeNextState(UnifiedRestoreState.FINAL); 6631 return; 6632 } 6633 } 6634 6635 // state RUNNING_QUEUE : figure out what the next thing to be restored is, 6636 // and fire the appropriate next step 6637 private void dispatchNextRestore() { 6638 UnifiedRestoreState nextState = UnifiedRestoreState.FINAL; 6639 try { 6640 mRestoreDescription = mTransport.nextRestorePackage(); 6641 final int type = mRestoreDescription.getDataType(); 6642 final String pkgName = mRestoreDescription.getPackageName(); 6643 if (pkgName == null) { 6644 Slog.e(TAG, "Failure getting next package name"); 6645 EventLog.writeEvent(EventLogTags.RESTORE_TRANSPORT_FAILURE); 6646 nextState = UnifiedRestoreState.FINAL; 6647 return; 6648 } else if (mRestoreDescription == RestoreDescription.NO_MORE_PACKAGES) { 6649 // Yay we've reached the end cleanly 6650 if (DEBUG) { 6651 Slog.v(TAG, "No more packages; finishing restore"); 6652 } 6653 int millis = (int) (SystemClock.elapsedRealtime() - mStartRealtime); 6654 EventLog.writeEvent(EventLogTags.RESTORE_SUCCESS, mCount, millis); 6655 nextState = UnifiedRestoreState.FINAL; 6656 return; 6657 } 6658 6659 if (DEBUG) { 6660 Slog.i(TAG, "Next restore package: " + mRestoreDescription); 6661 } 6662 sendOnRestorePackage(pkgName); 6663 6664 Metadata metaInfo = mPmAgent.getRestoredMetadata(pkgName); 6665 if (metaInfo == null) { 6666 Slog.e(TAG, "No metadata for " + pkgName); 6667 EventLog.writeEvent(EventLogTags.RESTORE_AGENT_FAILURE, pkgName, 6668 "Package metadata missing"); 6669 nextState = UnifiedRestoreState.RUNNING_QUEUE; 6670 return; 6671 } 6672 6673 try { 6674 mCurrentPackage = mPackageManager.getPackageInfo( 6675 pkgName, PackageManager.GET_SIGNATURES); 6676 } catch (NameNotFoundException e) { 6677 // Whoops, we thought we could restore this package but it 6678 // turns out not to be present. Skip it. 6679 Slog.e(TAG, "Package not present: " + pkgName); 6680 EventLog.writeEvent(EventLogTags.RESTORE_AGENT_FAILURE, pkgName, 6681 "Package missing on device"); 6682 nextState = UnifiedRestoreState.RUNNING_QUEUE; 6683 return; 6684 } 6685 6686 if (metaInfo.versionCode > mCurrentPackage.versionCode) { 6687 // Data is from a "newer" version of the app than we have currently 6688 // installed. If the app has not declared that it is prepared to 6689 // handle this case, we do not attempt the restore. 6690 if ((mCurrentPackage.applicationInfo.flags 6691 & ApplicationInfo.FLAG_RESTORE_ANY_VERSION) == 0) { 6692 String message = "Version " + metaInfo.versionCode 6693 + " > installed version " + mCurrentPackage.versionCode; 6694 Slog.w(TAG, "Package " + pkgName + ": " + message); 6695 EventLog.writeEvent(EventLogTags.RESTORE_AGENT_FAILURE, 6696 pkgName, message); 6697 nextState = UnifiedRestoreState.RUNNING_QUEUE; 6698 return; 6699 } else { 6700 if (DEBUG) Slog.v(TAG, "Version " + metaInfo.versionCode 6701 + " > installed " + mCurrentPackage.versionCode 6702 + " but restoreAnyVersion"); 6703 } 6704 } 6705 6706 if (DEBUG) Slog.v(TAG, "Package " + pkgName 6707 + " restore version [" + metaInfo.versionCode 6708 + "] is compatible with installed version [" 6709 + mCurrentPackage.versionCode + "]"); 6710 6711 // Reset per-package preconditions and fire the appropriate next state 6712 mWidgetData = null; 6713 if (type == RestoreDescription.TYPE_KEY_VALUE) { 6714 nextState = UnifiedRestoreState.RESTORE_KEYVALUE; 6715 } else if (type == RestoreDescription.TYPE_FULL_STREAM) { 6716 nextState = UnifiedRestoreState.RESTORE_FULL; 6717 } else { 6718 // Unknown restore type; ignore this package and move on 6719 Slog.e(TAG, "Unrecognized restore type " + type); 6720 nextState = UnifiedRestoreState.RUNNING_QUEUE; 6721 return; 6722 } 6723 } catch (RemoteException e) { 6724 Slog.e(TAG, "Can't get next target from transport; ending restore"); 6725 EventLog.writeEvent(EventLogTags.RESTORE_TRANSPORT_FAILURE); 6726 nextState = UnifiedRestoreState.FINAL; 6727 return; 6728 } finally { 6729 executeNextState(nextState); 6730 } 6731 } 6732 6733 // state RESTORE_KEYVALUE : restore one package via key/value API set 6734 private void restoreKeyValue() { 6735 // Initiating the restore will pass responsibility for the state machine's 6736 // progress to the agent callback, so we do not always execute the 6737 // next state here. 6738 final String packageName = mCurrentPackage.packageName; 6739 // Validate some semantic requirements that apply in this way 6740 // only to the key/value restore API flow 6741 if (mCurrentPackage.applicationInfo.backupAgentName == null 6742 || "".equals(mCurrentPackage.applicationInfo.backupAgentName)) { 6743 if (DEBUG) { 6744 Slog.i(TAG, "Data exists for package " + packageName 6745 + " but app has no agent; skipping"); 6746 } 6747 EventLog.writeEvent(EventLogTags.RESTORE_AGENT_FAILURE, packageName, 6748 "Package has no agent"); 6749 executeNextState(UnifiedRestoreState.RUNNING_QUEUE); 6750 return; 6751 } 6752 6753 Metadata metaInfo = mPmAgent.getRestoredMetadata(packageName); 6754 if (!signaturesMatch(metaInfo.sigHashes, mCurrentPackage)) { 6755 Slog.w(TAG, "Signature mismatch restoring " + packageName); 6756 EventLog.writeEvent(EventLogTags.RESTORE_AGENT_FAILURE, packageName, 6757 "Signature mismatch"); 6758 executeNextState(UnifiedRestoreState.RUNNING_QUEUE); 6759 return; 6760 } 6761 6762 // Good to go! Set up and bind the agent... 6763 mAgent = bindToAgentSynchronous( 6764 mCurrentPackage.applicationInfo, 6765 IApplicationThread.BACKUP_MODE_INCREMENTAL); 6766 if (mAgent == null) { 6767 Slog.w(TAG, "Can't find backup agent for " + packageName); 6768 EventLog.writeEvent(EventLogTags.RESTORE_AGENT_FAILURE, packageName, 6769 "Restore agent missing"); 6770 executeNextState(UnifiedRestoreState.RUNNING_QUEUE); 6771 return; 6772 } 6773 6774 // And then finally start the restore on this agent 6775 try { 6776 initiateOneRestore(mCurrentPackage, metaInfo.versionCode); 6777 ++mCount; 6778 } catch (Exception e) { 6779 Slog.e(TAG, "Error when attempting restore: " + e.toString()); 6780 keyValueAgentErrorCleanup(); 6781 executeNextState(UnifiedRestoreState.RUNNING_QUEUE); 6782 } 6783 } 6784 6785 // Guts of a key/value restore operation 6786 void initiateOneRestore(PackageInfo app, int appVersionCode) { 6787 final String packageName = app.packageName; 6788 6789 if (DEBUG) Slog.d(TAG, "initiateOneRestore packageName=" + packageName); 6790 6791 // !!! TODO: get the dirs from the transport 6792 mBackupDataName = new File(mDataDir, packageName + ".restore"); 6793 mStageName = new File(mDataDir, packageName + ".stage"); 6794 mNewStateName = new File(mStateDir, packageName + ".new"); 6795 mSavedStateName = new File(mStateDir, packageName); 6796 6797 // don't stage the 'android' package where the wallpaper data lives. this is 6798 // an optimization: we know there's no widget data hosted/published by that 6799 // package, and this way we avoid doing a spurious copy of MB-sized wallpaper 6800 // data following the download. 6801 boolean staging = !packageName.equals("android"); 6802 ParcelFileDescriptor stage; 6803 File downloadFile = (staging) ? mStageName : mBackupDataName; 6804 6805 final int token = generateToken(); 6806 try { 6807 // Run the transport's restore pass 6808 stage = ParcelFileDescriptor.open(downloadFile, 6809 ParcelFileDescriptor.MODE_READ_WRITE | 6810 ParcelFileDescriptor.MODE_CREATE | 6811 ParcelFileDescriptor.MODE_TRUNCATE); 6812 6813 if (!SELinux.restorecon(mBackupDataName)) { 6814 Slog.e(TAG, "SElinux restorecon failed for " + downloadFile); 6815 } 6816 6817 if (mTransport.getRestoreData(stage) != BackupTransport.TRANSPORT_OK) { 6818 // Transport-level failure, so we wind everything up and 6819 // terminate the restore operation. 6820 Slog.e(TAG, "Error getting restore data for " + packageName); 6821 EventLog.writeEvent(EventLogTags.RESTORE_TRANSPORT_FAILURE); 6822 stage.close(); 6823 downloadFile.delete(); 6824 executeNextState(UnifiedRestoreState.FINAL); 6825 return; 6826 } 6827 6828 // We have the data from the transport. Now we extract and strip 6829 // any per-package metadata (typically widget-related information) 6830 // if appropriate 6831 if (staging) { 6832 stage.close(); 6833 stage = ParcelFileDescriptor.open(downloadFile, 6834 ParcelFileDescriptor.MODE_READ_ONLY); 6835 6836 mBackupData = ParcelFileDescriptor.open(mBackupDataName, 6837 ParcelFileDescriptor.MODE_READ_WRITE | 6838 ParcelFileDescriptor.MODE_CREATE | 6839 ParcelFileDescriptor.MODE_TRUNCATE); 6840 6841 BackupDataInput in = new BackupDataInput(stage.getFileDescriptor()); 6842 BackupDataOutput out = new BackupDataOutput(mBackupData.getFileDescriptor()); 6843 byte[] buffer = new byte[8192]; // will grow when needed 6844 while (in.readNextHeader()) { 6845 final String key = in.getKey(); 6846 final int size = in.getDataSize(); 6847 6848 // is this a special key? 6849 if (key.equals(KEY_WIDGET_STATE)) { 6850 if (DEBUG) { 6851 Slog.i(TAG, "Restoring widget state for " + packageName); 6852 } 6853 mWidgetData = new byte[size]; 6854 in.readEntityData(mWidgetData, 0, size); 6855 } else { 6856 if (size > buffer.length) { 6857 buffer = new byte[size]; 6858 } 6859 in.readEntityData(buffer, 0, size); 6860 out.writeEntityHeader(key, size); 6861 out.writeEntityData(buffer, size); 6862 } 6863 } 6864 6865 mBackupData.close(); 6866 } 6867 6868 // Okay, we have the data. Now have the agent do the restore. 6869 stage.close(); 6870 mBackupData = ParcelFileDescriptor.open(mBackupDataName, 6871 ParcelFileDescriptor.MODE_READ_ONLY); 6872 6873 mNewState = ParcelFileDescriptor.open(mNewStateName, 6874 ParcelFileDescriptor.MODE_READ_WRITE | 6875 ParcelFileDescriptor.MODE_CREATE | 6876 ParcelFileDescriptor.MODE_TRUNCATE); 6877 6878 // Kick off the restore, checking for hung agents. The timeout or 6879 // the operationComplete() callback will schedule the next step, 6880 // so we do not do that here. 6881 prepareOperationTimeout(token, TIMEOUT_RESTORE_INTERVAL, this); 6882 mAgent.doRestore(mBackupData, appVersionCode, mNewState, 6883 token, mBackupManagerBinder); 6884 } catch (Exception e) { 6885 Slog.e(TAG, "Unable to call app for restore: " + packageName, e); 6886 EventLog.writeEvent(EventLogTags.RESTORE_AGENT_FAILURE, 6887 packageName, e.toString()); 6888 keyValueAgentErrorCleanup(); // clears any pending timeout messages as well 6889 6890 // After a restore failure we go back to running the queue. If there 6891 // are no more packages to be restored that will be handled by the 6892 // next step. 6893 executeNextState(UnifiedRestoreState.RUNNING_QUEUE); 6894 } 6895 } 6896 6897 // state RESTORE_FULL : restore one package via streaming engine 6898 private void restoreFull() { 6899 // None of this can run on the work looper here, so we spin asynchronous 6900 // work like this: 6901 // 6902 // StreamFeederThread: read data from mTransport.getNextFullRestoreDataChunk() 6903 // write it into the pipe to the engine 6904 // EngineThread: FullRestoreEngine thread communicating with the target app 6905 // 6906 // When finished, StreamFeederThread executes next state as appropriate on the 6907 // backup looper, and the overall unified restore task resumes 6908 try { 6909 StreamFeederThread feeder = new StreamFeederThread(); 6910 if (DEBUG) { 6911 Slog.i(TAG, "Spinning threads for stream restore of " 6912 + mCurrentPackage.packageName); 6913 } 6914 new Thread(feeder, "unified-stream-feeder").start(); 6915 6916 // At this point the feeder is responsible for advancing the restore 6917 // state, so we're done here. 6918 } catch (IOException e) { 6919 // Unable to instantiate the feeder thread -- we need to bail on the 6920 // current target. We haven't asked the transport for data yet, though, 6921 // so we can do that simply by going back to running the restore queue. 6922 Slog.e(TAG, "Unable to construct pipes for stream restore!"); 6923 executeNextState(UnifiedRestoreState.RUNNING_QUEUE); 6924 } 6925 } 6926 6927 // state RESTORE_FINISHED : provide the "no more data" signpost callback at the end 6928 private void restoreFinished() { 6929 try { 6930 final int token = generateToken(); 6931 prepareOperationTimeout(token, TIMEOUT_RESTORE_FINISHED_INTERVAL, this); 6932 mAgent.doRestoreFinished(token, mBackupManagerBinder); 6933 // If we get this far, the callback or timeout will schedule the 6934 // next restore state, so we're done 6935 } catch (Exception e) { 6936 Slog.e(TAG, "Unable to finalize restore of " + mCurrentPackage.packageName); 6937 executeNextState(UnifiedRestoreState.FINAL); 6938 } 6939 } 6940 6941 class StreamFeederThread extends RestoreEngine implements Runnable { 6942 final String TAG = "StreamFeederThread"; 6943 FullRestoreEngine mEngine; 6944 6945 // pipe through which we read data from the transport. [0] read, [1] write 6946 ParcelFileDescriptor[] mTransportPipes; 6947 6948 // pipe through which the engine will read data. [0] read, [1] write 6949 ParcelFileDescriptor[] mEnginePipes; 6950 6951 public StreamFeederThread() throws IOException { 6952 mTransportPipes = ParcelFileDescriptor.createPipe(); 6953 mEnginePipes = ParcelFileDescriptor.createPipe(); 6954 setRunning(true); 6955 } 6956 6957 @Override 6958 public void run() { 6959 UnifiedRestoreState nextState = UnifiedRestoreState.RUNNING_QUEUE; 6960 int status = BackupTransport.TRANSPORT_OK; 6961 6962 mEngine = new FullRestoreEngine(null, mCurrentPackage, false, false); 6963 EngineThread eThread = new EngineThread(mEngine, mEnginePipes[0]); 6964 6965 ParcelFileDescriptor eWriteEnd = mEnginePipes[1]; 6966 ParcelFileDescriptor tReadEnd = mTransportPipes[0]; 6967 ParcelFileDescriptor tWriteEnd = mTransportPipes[1]; 6968 6969 int bufferSize = 32 * 1024; 6970 byte[] buffer = new byte[bufferSize]; 6971 FileOutputStream engineOut = new FileOutputStream(eWriteEnd.getFileDescriptor()); 6972 FileInputStream transportIn = new FileInputStream(tReadEnd.getFileDescriptor()); 6973 6974 // spin up the engine and start moving data to it 6975 new Thread(eThread, "unified-restore-engine").start(); 6976 6977 try { 6978 while (status == BackupTransport.TRANSPORT_OK) { 6979 // have the transport write some of the restoring data to us 6980 int result = mTransport.getNextFullRestoreDataChunk(tWriteEnd); 6981 if (result > 0) { 6982 // The transport wrote this many bytes of restore data to the 6983 // pipe, so pass it along to the engine. 6984 if (MORE_DEBUG) { 6985 Slog.v(TAG, " <- transport provided chunk size " + result); 6986 } 6987 if (result > bufferSize) { 6988 bufferSize = result; 6989 buffer = new byte[bufferSize]; 6990 } 6991 int toCopy = result; 6992 while (toCopy > 0) { 6993 int n = transportIn.read(buffer, 0, toCopy); 6994 engineOut.write(buffer, 0, n); 6995 toCopy -= n; 6996 if (MORE_DEBUG) { 6997 Slog.v(TAG, " -> wrote " + n + " to engine, left=" + toCopy); 6998 } 6999 } 7000 } else if (result == BackupTransport.NO_MORE_DATA) { 7001 // Clean finish. Wind up and we're done! 7002 if (MORE_DEBUG) { 7003 Slog.i(TAG, "Got clean full-restore EOF for " 7004 + mCurrentPackage.packageName); 7005 } 7006 status = BackupTransport.TRANSPORT_OK; 7007 break; 7008 } else { 7009 // Transport reported some sort of failure; the fall-through 7010 // handling will deal properly with that. 7011 Slog.e(TAG, "Error " + result + " streaming restore for " 7012 + mCurrentPackage.packageName); 7013 status = result; 7014 } 7015 } 7016 if (MORE_DEBUG) Slog.v(TAG, "Done copying to engine, falling through"); 7017 } catch (IOException e) { 7018 // We lost our ability to communicate via the pipes. That's worrying 7019 // but potentially recoverable; abandon this package's restore but 7020 // carry on with the next restore target. 7021 Slog.e(TAG, "Unable to route data for restore"); 7022 status = BackupTransport.AGENT_ERROR; 7023 } catch (RemoteException e) { 7024 // The transport went away; terminate the whole operation. Closing 7025 // the sockets will wake up the engine and it will then tidy up the 7026 // remote end. 7027 Slog.e(TAG, "Transport failed during restore"); 7028 status = BackupTransport.TRANSPORT_ERROR; 7029 } finally { 7030 // Close the transport pipes and *our* end of the engine pipe, 7031 // but leave the engine thread's end open so that it properly 7032 // hits EOF and winds up its operations. 7033 IoUtils.closeQuietly(mEnginePipes[1]); 7034 IoUtils.closeQuietly(mTransportPipes[0]); 7035 IoUtils.closeQuietly(mTransportPipes[1]); 7036 7037 // Don't proceed until the engine has torn down the agent etc 7038 eThread.waitForResult(); 7039 7040 if (MORE_DEBUG) { 7041 Slog.i(TAG, "engine thread finished; proceeding"); 7042 } 7043 7044 // Now we're really done with this one too 7045 IoUtils.closeQuietly(mEnginePipes[0]); 7046 7047 // If we hit a transport-level error, we are done with everything; 7048 // if we hit an agent error we just go back to running the queue. 7049 if (status == BackupTransport.TRANSPORT_OK) { 7050 // Clean finish, so just carry on 7051 nextState = UnifiedRestoreState.RUNNING_QUEUE; 7052 } else { 7053 // Something went wrong somewhere. Whether it was at the transport 7054 // level is immaterial; we need to tell the transport to bail 7055 try { 7056 mTransport.abortFullRestore(); 7057 } catch (RemoteException e) { 7058 // transport itself is dead; make sure we handle this as a 7059 // fatal error 7060 status = BackupTransport.TRANSPORT_ERROR; 7061 } 7062 7063 // We also need to wipe the current target's data, as it's probably 7064 // in an incoherent state. 7065 clearApplicationDataSynchronous(mCurrentPackage.packageName); 7066 7067 // Schedule the next state based on the nature of our failure 7068 if (status == BackupTransport.TRANSPORT_ERROR) { 7069 nextState = UnifiedRestoreState.FINAL; 7070 } else { 7071 nextState = UnifiedRestoreState.RUNNING_QUEUE; 7072 } 7073 } 7074 executeNextState(nextState); 7075 setRunning(false); 7076 } 7077 } 7078 7079 } 7080 7081 class EngineThread implements Runnable { 7082 FullRestoreEngine mEngine; 7083 FileInputStream mEngineStream; 7084 7085 EngineThread(FullRestoreEngine engine, ParcelFileDescriptor engineSocket) { 7086 mEngine = engine; 7087 engine.setRunning(true); 7088 mEngineStream = new FileInputStream(engineSocket.getFileDescriptor()); 7089 } 7090 7091 public boolean isRunning() { 7092 return mEngine.isRunning(); 7093 } 7094 7095 public int waitForResult() { 7096 return mEngine.waitForResult(); 7097 } 7098 7099 @Override 7100 public void run() { 7101 while (mEngine.isRunning()) { 7102 mEngine.restoreOneFile(mEngineStream); 7103 } 7104 } 7105 } 7106 7107 // state FINAL : tear everything down and we're done. 7108 private void finalizeRestore() { 7109 if (MORE_DEBUG) Slog.d(TAG, "finishing restore mObserver=" + mObserver); 7110 7111 try { 7112 mTransport.finishRestore(); 7113 } catch (Exception e) { 7114 Slog.e(TAG, "Error finishing restore", e); 7115 } 7116 7117 // Tell the observer we're done 7118 if (mObserver != null) { 7119 try { 7120 mObserver.restoreFinished(mStatus); 7121 } catch (RemoteException e) { 7122 Slog.d(TAG, "Restore observer died at restoreFinished"); 7123 } 7124 } 7125 7126 // If we have a PM token, we must under all circumstances be sure to 7127 // handshake when we've finished. 7128 if (mPmToken > 0) { 7129 if (MORE_DEBUG) Slog.v(TAG, "finishing PM token " + mPmToken); 7130 try { 7131 mPackageManagerBinder.finishPackageInstall(mPmToken); 7132 } catch (RemoteException e) { /* can't happen */ } 7133 } 7134 7135 // Kick off any work that may be needed regarding app widget restores 7136 AppWidgetBackupBridge.restoreFinished(UserHandle.USER_OWNER); 7137 7138 // If this was a full-system restore, record the ancestral 7139 // dataset information 7140 if (mIsSystemRestore) { 7141 mAncestralPackages = mPmAgent.getRestoredPackages(); 7142 mAncestralToken = mToken; 7143 writeRestoreTokens(); 7144 } 7145 7146 // Furthermore we need to reset the session timeout clock 7147 mBackupHandler.removeMessages(MSG_RESTORE_TIMEOUT); 7148 mBackupHandler.sendEmptyMessageDelayed(MSG_RESTORE_TIMEOUT, 7149 TIMEOUT_RESTORE_INTERVAL); 7150 7151 // done; we can finally release the wakelock and be legitimately done. 7152 Slog.i(TAG, "Restore complete."); 7153 mWakelock.release(); 7154 } 7155 7156 void keyValueAgentErrorCleanup() { 7157 // If the agent fails restore, it might have put the app's data 7158 // into an incoherent state. For consistency we wipe its data 7159 // again in this case before continuing with normal teardown 7160 clearApplicationDataSynchronous(mCurrentPackage.packageName); 7161 keyValueAgentCleanup(); 7162 } 7163 7164 void keyValueAgentCleanup() { 7165 mBackupDataName.delete(); 7166 mStageName.delete(); 7167 try { if (mBackupData != null) mBackupData.close(); } catch (IOException e) {} 7168 try { if (mNewState != null) mNewState.close(); } catch (IOException e) {} 7169 mBackupData = mNewState = null; 7170 7171 // if everything went okay, remember the recorded state now 7172 // 7173 // !!! TODO: the restored data could be migrated on the server 7174 // side into the current dataset. In that case the new state file 7175 // we just created would reflect the data already extant in the 7176 // backend, so there'd be nothing more to do. Until that happens, 7177 // however, we need to make sure that we record the data to the 7178 // current backend dataset. (Yes, this means shipping the data over 7179 // the wire in both directions. That's bad, but consistency comes 7180 // first, then efficiency.) Once we introduce server-side data 7181 // migration to the newly-restored device's dataset, we will change 7182 // the following from a discard of the newly-written state to the 7183 // "correct" operation of renaming into the canonical state blob. 7184 mNewStateName.delete(); // TODO: remove; see above comment 7185 //mNewStateName.renameTo(mSavedStateName); // TODO: replace with this 7186 7187 // If this wasn't the PM pseudopackage, tear down the agent side 7188 if (mCurrentPackage.applicationInfo != null) { 7189 // unbind and tidy up even on timeout or failure 7190 try { 7191 mActivityManager.unbindBackupAgent(mCurrentPackage.applicationInfo); 7192 7193 // The agent was probably running with a stub Application object, 7194 // which isn't a valid run mode for the main app logic. Shut 7195 // down the app so that next time it's launched, it gets the 7196 // usual full initialization. Note that this is only done for 7197 // full-system restores: when a single app has requested a restore, 7198 // it is explicitly not killed following that operation. 7199 if (mTargetPackage == null && (mCurrentPackage.applicationInfo.flags 7200 & ApplicationInfo.FLAG_KILL_AFTER_RESTORE) != 0) { 7201 if (DEBUG) Slog.d(TAG, "Restore complete, killing host process of " 7202 + mCurrentPackage.applicationInfo.processName); 7203 mActivityManager.killApplicationProcess( 7204 mCurrentPackage.applicationInfo.processName, 7205 mCurrentPackage.applicationInfo.uid); 7206 } 7207 } catch (RemoteException e) { 7208 // can't happen; we run in the same process as the activity manager 7209 } 7210 } 7211 7212 // The caller is responsible for reestablishing the state machine; our 7213 // responsibility here is to clear the decks for whatever comes next. 7214 mBackupHandler.removeMessages(MSG_TIMEOUT, this); 7215 synchronized (mCurrentOpLock) { 7216 mCurrentOperations.clear(); 7217 } 7218 } 7219 7220 @Override 7221 public void operationComplete() { 7222 if (MORE_DEBUG) { 7223 Slog.i(TAG, "operationComplete() during restore: target=" 7224 + mCurrentPackage.packageName 7225 + " state=" + mState); 7226 } 7227 7228 final UnifiedRestoreState nextState; 7229 switch (mState) { 7230 case INITIAL: 7231 // We've just (manually) restored the PMBA. It doesn't need the 7232 // additional restore-finished callback so we bypass that and go 7233 // directly to running the queue. 7234 nextState = UnifiedRestoreState.RUNNING_QUEUE; 7235 break; 7236 7237 case RESTORE_KEYVALUE: 7238 case RESTORE_FULL: { 7239 // Okay, we've just heard back from the agent that it's done with 7240 // the restore itself. We now have to send the same agent its 7241 // doRestoreFinished() callback, so roll into that state. 7242 nextState = UnifiedRestoreState.RESTORE_FINISHED; 7243 break; 7244 } 7245 7246 case RESTORE_FINISHED: { 7247 // Okay, we're done with this package. Tidy up and go on to the next 7248 // app in the queue. 7249 int size = (int) mBackupDataName.length(); 7250 EventLog.writeEvent(EventLogTags.RESTORE_PACKAGE, 7251 mCurrentPackage.packageName, size); 7252 7253 // Just go back to running the restore queue 7254 keyValueAgentCleanup(); 7255 7256 // If there was widget state associated with this app, get the OS to 7257 // incorporate it into current bookeeping and then pass that along to 7258 // the app as part of the restore-time work. 7259 if (mWidgetData != null) { 7260 restoreWidgetData(mCurrentPackage.packageName, mWidgetData); 7261 } 7262 7263 nextState = UnifiedRestoreState.RUNNING_QUEUE; 7264 break; 7265 } 7266 7267 default: { 7268 // Some kind of horrible semantic error; we're in an unexpected state. 7269 // Back off hard and wind up. 7270 Slog.e(TAG, "Unexpected restore callback into state " + mState); 7271 keyValueAgentErrorCleanup(); 7272 nextState = UnifiedRestoreState.FINAL; 7273 break; 7274 } 7275 } 7276 7277 executeNextState(nextState); 7278 } 7279 7280 // A call to agent.doRestore() or agent.doRestoreFinished() has timed out 7281 @Override 7282 public void handleTimeout() { 7283 Slog.e(TAG, "Timeout restoring application " + mCurrentPackage.packageName); 7284 EventLog.writeEvent(EventLogTags.RESTORE_AGENT_FAILURE, 7285 mCurrentPackage.packageName, "restore timeout"); 7286 // Handle like an agent that threw on invocation: wipe it and go on to the next 7287 keyValueAgentErrorCleanup(); 7288 executeNextState(UnifiedRestoreState.RUNNING_QUEUE); 7289 } 7290 7291 void executeNextState(UnifiedRestoreState nextState) { 7292 if (MORE_DEBUG) Slog.i(TAG, " => executing next step on " 7293 + this + " nextState=" + nextState); 7294 mState = nextState; 7295 Message msg = mBackupHandler.obtainMessage(MSG_BACKUP_RESTORE_STEP, this); 7296 mBackupHandler.sendMessage(msg); 7297 } 7298 7299 // restore observer support 7300 void sendStartRestore(int numPackages) { 7301 if (mObserver != null) { 7302 try { 7303 mObserver.restoreStarting(numPackages); 7304 } catch (RemoteException e) { 7305 Slog.w(TAG, "Restore observer went away: startRestore"); 7306 mObserver = null; 7307 } 7308 } 7309 } 7310 7311 void sendOnRestorePackage(String name) { 7312 if (mObserver != null) { 7313 if (mObserver != null) { 7314 try { 7315 mObserver.onUpdate(mCount, name); 7316 } catch (RemoteException e) { 7317 Slog.d(TAG, "Restore observer died in onUpdate"); 7318 mObserver = null; 7319 } 7320 } 7321 } 7322 } 7323 7324 void sendEndRestore() { 7325 if (mObserver != null) { 7326 try { 7327 mObserver.restoreFinished(mStatus); 7328 } catch (RemoteException e) { 7329 Slog.w(TAG, "Restore observer went away: endRestore"); 7330 mObserver = null; 7331 } 7332 } 7333 } 7334 } 7335 7336 class PerformClearTask implements Runnable { 7337 IBackupTransport mTransport; 7338 PackageInfo mPackage; 7339 7340 PerformClearTask(IBackupTransport transport, PackageInfo packageInfo) { 7341 mTransport = transport; 7342 mPackage = packageInfo; 7343 } 7344 7345 public void run() { 7346 try { 7347 // Clear the on-device backup state to ensure a full backup next time 7348 File stateDir = new File(mBaseStateDir, mTransport.transportDirName()); 7349 File stateFile = new File(stateDir, mPackage.packageName); 7350 stateFile.delete(); 7351 7352 // Tell the transport to remove all the persistent storage for the app 7353 // TODO - need to handle failures 7354 mTransport.clearBackupData(mPackage); 7355 } catch (RemoteException e) { 7356 // can't happen; the transport is local 7357 } catch (Exception e) { 7358 Slog.e(TAG, "Transport threw attempting to clear data for " + mPackage); 7359 } finally { 7360 try { 7361 // TODO - need to handle failures 7362 mTransport.finishBackup(); 7363 } catch (RemoteException e) { 7364 // can't happen; the transport is local 7365 } 7366 7367 // Last but not least, release the cpu 7368 mWakelock.release(); 7369 } 7370 } 7371 } 7372 7373 class PerformInitializeTask implements Runnable { 7374 HashSet<String> mQueue; 7375 7376 PerformInitializeTask(HashSet<String> transportNames) { 7377 mQueue = transportNames; 7378 } 7379 7380 public void run() { 7381 try { 7382 for (String transportName : mQueue) { 7383 IBackupTransport transport = getTransport(transportName); 7384 if (transport == null) { 7385 Slog.e(TAG, "Requested init for " + transportName + " but not found"); 7386 continue; 7387 } 7388 7389 Slog.i(TAG, "Initializing (wiping) backup transport storage: " + transportName); 7390 EventLog.writeEvent(EventLogTags.BACKUP_START, transport.transportDirName()); 7391 long startRealtime = SystemClock.elapsedRealtime(); 7392 int status = transport.initializeDevice(); 7393 7394 if (status == BackupTransport.TRANSPORT_OK) { 7395 status = transport.finishBackup(); 7396 } 7397 7398 // Okay, the wipe really happened. Clean up our local bookkeeping. 7399 if (status == BackupTransport.TRANSPORT_OK) { 7400 Slog.i(TAG, "Device init successful"); 7401 int millis = (int) (SystemClock.elapsedRealtime() - startRealtime); 7402 EventLog.writeEvent(EventLogTags.BACKUP_INITIALIZE); 7403 resetBackupState(new File(mBaseStateDir, transport.transportDirName())); 7404 EventLog.writeEvent(EventLogTags.BACKUP_SUCCESS, 0, millis); 7405 synchronized (mQueueLock) { 7406 recordInitPendingLocked(false, transportName); 7407 } 7408 } else { 7409 // If this didn't work, requeue this one and try again 7410 // after a suitable interval 7411 Slog.e(TAG, "Transport error in initializeDevice()"); 7412 EventLog.writeEvent(EventLogTags.BACKUP_TRANSPORT_FAILURE, "(initialize)"); 7413 synchronized (mQueueLock) { 7414 recordInitPendingLocked(true, transportName); 7415 } 7416 // do this via another alarm to make sure of the wakelock states 7417 long delay = transport.requestBackupTime(); 7418 if (DEBUG) Slog.w(TAG, "init failed on " 7419 + transportName + " resched in " + delay); 7420 mAlarmManager.set(AlarmManager.RTC_WAKEUP, 7421 System.currentTimeMillis() + delay, mRunInitIntent); 7422 } 7423 } 7424 } catch (RemoteException e) { 7425 // can't happen; the transports are local 7426 } catch (Exception e) { 7427 Slog.e(TAG, "Unexpected error performing init", e); 7428 } finally { 7429 // Done; release the wakelock 7430 mWakelock.release(); 7431 } 7432 } 7433 } 7434 7435 private void dataChangedImpl(String packageName) { 7436 HashSet<String> targets = dataChangedTargets(packageName); 7437 dataChangedImpl(packageName, targets); 7438 } 7439 7440 private void dataChangedImpl(String packageName, HashSet<String> targets) { 7441 // Record that we need a backup pass for the caller. Since multiple callers 7442 // may share a uid, we need to note all candidates within that uid and schedule 7443 // a backup pass for each of them. 7444 EventLog.writeEvent(EventLogTags.BACKUP_DATA_CHANGED, packageName); 7445 7446 if (targets == null) { 7447 Slog.w(TAG, "dataChanged but no participant pkg='" + packageName + "'" 7448 + " uid=" + Binder.getCallingUid()); 7449 return; 7450 } 7451 7452 synchronized (mQueueLock) { 7453 // Note that this client has made data changes that need to be backed up 7454 if (targets.contains(packageName)) { 7455 // Add the caller to the set of pending backups. If there is 7456 // one already there, then overwrite it, but no harm done. 7457 BackupRequest req = new BackupRequest(packageName); 7458 if (mPendingBackups.put(packageName, req) == null) { 7459 if (DEBUG) Slog.d(TAG, "Now staging backup of " + packageName); 7460 7461 // Journal this request in case of crash. The put() 7462 // operation returned null when this package was not already 7463 // in the set; we want to avoid touching the disk redundantly. 7464 writeToJournalLocked(packageName); 7465 7466 if (MORE_DEBUG) { 7467 int numKeys = mPendingBackups.size(); 7468 Slog.d(TAG, "Now awaiting backup for " + numKeys + " participants:"); 7469 for (BackupRequest b : mPendingBackups.values()) { 7470 Slog.d(TAG, " + " + b); 7471 } 7472 } 7473 } 7474 } 7475 } 7476 } 7477 7478 // Note: packageName is currently unused, but may be in the future 7479 private HashSet<String> dataChangedTargets(String packageName) { 7480 // If the caller does not hold the BACKUP permission, it can only request a 7481 // backup of its own data. 7482 if ((mContext.checkPermission(android.Manifest.permission.BACKUP, Binder.getCallingPid(), 7483 Binder.getCallingUid())) == PackageManager.PERMISSION_DENIED) { 7484 synchronized (mBackupParticipants) { 7485 return mBackupParticipants.get(Binder.getCallingUid()); 7486 } 7487 } 7488 7489 // a caller with full permission can ask to back up any participating app 7490 // !!! TODO: allow backup of ANY app? 7491 HashSet<String> targets = new HashSet<String>(); 7492 synchronized (mBackupParticipants) { 7493 int N = mBackupParticipants.size(); 7494 for (int i = 0; i < N; i++) { 7495 HashSet<String> s = mBackupParticipants.valueAt(i); 7496 if (s != null) { 7497 targets.addAll(s); 7498 } 7499 } 7500 } 7501 return targets; 7502 } 7503 7504 private void writeToJournalLocked(String str) { 7505 RandomAccessFile out = null; 7506 try { 7507 if (mJournal == null) mJournal = File.createTempFile("journal", null, mJournalDir); 7508 out = new RandomAccessFile(mJournal, "rws"); 7509 out.seek(out.length()); 7510 out.writeUTF(str); 7511 } catch (IOException e) { 7512 Slog.e(TAG, "Can't write " + str + " to backup journal", e); 7513 mJournal = null; 7514 } finally { 7515 try { if (out != null) out.close(); } catch (IOException e) {} 7516 } 7517 } 7518 7519 // ----- IBackupManager binder interface ----- 7520 7521 public void dataChanged(final String packageName) { 7522 final int callingUserHandle = UserHandle.getCallingUserId(); 7523 if (callingUserHandle != UserHandle.USER_OWNER) { 7524 // App is running under a non-owner user profile. For now, we do not back 7525 // up data from secondary user profiles. 7526 // TODO: backups for all user profiles. 7527 if (MORE_DEBUG) { 7528 Slog.v(TAG, "dataChanged(" + packageName + ") ignored because it's user " 7529 + callingUserHandle); 7530 } 7531 return; 7532 } 7533 7534 final HashSet<String> targets = dataChangedTargets(packageName); 7535 if (targets == null) { 7536 Slog.w(TAG, "dataChanged but no participant pkg='" + packageName + "'" 7537 + " uid=" + Binder.getCallingUid()); 7538 return; 7539 } 7540 7541 mBackupHandler.post(new Runnable() { 7542 public void run() { 7543 dataChangedImpl(packageName, targets); 7544 } 7545 }); 7546 } 7547 7548 // Clear the given package's backup data from the current transport 7549 public void clearBackupData(String transportName, String packageName) { 7550 if (DEBUG) Slog.v(TAG, "clearBackupData() of " + packageName + " on " + transportName); 7551 PackageInfo info; 7552 try { 7553 info = mPackageManager.getPackageInfo(packageName, PackageManager.GET_SIGNATURES); 7554 } catch (NameNotFoundException e) { 7555 Slog.d(TAG, "No such package '" + packageName + "' - not clearing backup data"); 7556 return; 7557 } 7558 7559 // If the caller does not hold the BACKUP permission, it can only request a 7560 // wipe of its own backed-up data. 7561 HashSet<String> apps; 7562 if ((mContext.checkPermission(android.Manifest.permission.BACKUP, Binder.getCallingPid(), 7563 Binder.getCallingUid())) == PackageManager.PERMISSION_DENIED) { 7564 apps = mBackupParticipants.get(Binder.getCallingUid()); 7565 } else { 7566 // a caller with full permission can ask to back up any participating app 7567 // !!! TODO: allow data-clear of ANY app? 7568 if (DEBUG) Slog.v(TAG, "Privileged caller, allowing clear of other apps"); 7569 apps = new HashSet<String>(); 7570 int N = mBackupParticipants.size(); 7571 for (int i = 0; i < N; i++) { 7572 HashSet<String> s = mBackupParticipants.valueAt(i); 7573 if (s != null) { 7574 apps.addAll(s); 7575 } 7576 } 7577 } 7578 7579 // Is the given app an available participant? 7580 if (apps.contains(packageName)) { 7581 // found it; fire off the clear request 7582 if (DEBUG) Slog.v(TAG, "Found the app - running clear process"); 7583 mBackupHandler.removeMessages(MSG_RETRY_CLEAR); 7584 synchronized (mQueueLock) { 7585 final IBackupTransport transport = getTransport(transportName); 7586 if (transport == null) { 7587 // transport is currently unavailable -- make sure to retry 7588 Message msg = mBackupHandler.obtainMessage(MSG_RETRY_CLEAR, 7589 new ClearRetryParams(transportName, packageName)); 7590 mBackupHandler.sendMessageDelayed(msg, TRANSPORT_RETRY_INTERVAL); 7591 return; 7592 } 7593 long oldId = Binder.clearCallingIdentity(); 7594 mWakelock.acquire(); 7595 Message msg = mBackupHandler.obtainMessage(MSG_RUN_CLEAR, 7596 new ClearParams(transport, info)); 7597 mBackupHandler.sendMessage(msg); 7598 Binder.restoreCallingIdentity(oldId); 7599 } 7600 } 7601 } 7602 7603 // Run a backup pass immediately for any applications that have declared 7604 // that they have pending updates. 7605 public void backupNow() { 7606 mContext.enforceCallingOrSelfPermission(android.Manifest.permission.BACKUP, "backupNow"); 7607 7608 if (DEBUG) Slog.v(TAG, "Scheduling immediate backup pass"); 7609 synchronized (mQueueLock) { 7610 // Because the alarms we are using can jitter, and we want an *immediate* 7611 // backup pass to happen, we restart the timer beginning with "next time," 7612 // then manually fire the backup trigger intent ourselves. 7613 startBackupAlarmsLocked(BACKUP_INTERVAL); 7614 try { 7615 mRunBackupIntent.send(); 7616 } catch (PendingIntent.CanceledException e) { 7617 // should never happen 7618 Slog.e(TAG, "run-backup intent cancelled!"); 7619 } 7620 } 7621 } 7622 7623 boolean deviceIsProvisioned() { 7624 final ContentResolver resolver = mContext.getContentResolver(); 7625 return (Settings.Global.getInt(resolver, Settings.Global.DEVICE_PROVISIONED, 0) != 0); 7626 } 7627 7628 // Run a *full* backup pass for the given packages, writing the resulting data stream 7629 // to the supplied file descriptor. This method is synchronous and does not return 7630 // to the caller until the backup has been completed. 7631 // 7632 // This is the variant used by 'adb backup'; it requires on-screen confirmation 7633 // by the user because it can be used to offload data over untrusted USB. 7634 @Override 7635 public void fullBackup(ParcelFileDescriptor fd, boolean includeApks, 7636 boolean includeObbs, boolean includeShared, boolean doWidgets, 7637 boolean doAllApps, boolean includeSystem, boolean compress, String[] pkgList) { 7638 mContext.enforceCallingPermission(android.Manifest.permission.BACKUP, "fullBackup"); 7639 7640 final int callingUserHandle = UserHandle.getCallingUserId(); 7641 if (callingUserHandle != UserHandle.USER_OWNER) { 7642 throw new IllegalStateException("Backup supported only for the device owner"); 7643 } 7644 7645 // Validate 7646 if (!doAllApps) { 7647 if (!includeShared) { 7648 // If we're backing up shared data (sdcard or equivalent), then we can run 7649 // without any supplied app names. Otherwise, we'd be doing no work, so 7650 // report the error. 7651 if (pkgList == null || pkgList.length == 0) { 7652 throw new IllegalArgumentException( 7653 "Backup requested but neither shared nor any apps named"); 7654 } 7655 } 7656 } 7657 7658 long oldId = Binder.clearCallingIdentity(); 7659 try { 7660 // Doesn't make sense to do a full backup prior to setup 7661 if (!deviceIsProvisioned()) { 7662 Slog.i(TAG, "Full backup not supported before setup"); 7663 return; 7664 } 7665 7666 if (DEBUG) Slog.v(TAG, "Requesting full backup: apks=" + includeApks 7667 + " obb=" + includeObbs + " shared=" + includeShared + " all=" + doAllApps 7668 + " pkgs=" + pkgList); 7669 Slog.i(TAG, "Beginning full backup..."); 7670 7671 FullBackupParams params = new FullBackupParams(fd, includeApks, includeObbs, 7672 includeShared, doWidgets, doAllApps, includeSystem, compress, pkgList); 7673 final int token = generateToken(); 7674 synchronized (mFullConfirmations) { 7675 mFullConfirmations.put(token, params); 7676 } 7677 7678 // start up the confirmation UI 7679 if (DEBUG) Slog.d(TAG, "Starting backup confirmation UI, token=" + token); 7680 if (!startConfirmationUi(token, FullBackup.FULL_BACKUP_INTENT_ACTION)) { 7681 Slog.e(TAG, "Unable to launch full backup confirmation"); 7682 mFullConfirmations.delete(token); 7683 return; 7684 } 7685 7686 // make sure the screen is lit for the user interaction 7687 mPowerManager.userActivity(SystemClock.uptimeMillis(), false); 7688 7689 // start the confirmation countdown 7690 startConfirmationTimeout(token, params); 7691 7692 // wait for the backup to be performed 7693 if (DEBUG) Slog.d(TAG, "Waiting for full backup completion..."); 7694 waitForCompletion(params); 7695 } finally { 7696 try { 7697 fd.close(); 7698 } catch (IOException e) { 7699 // just eat it 7700 } 7701 Binder.restoreCallingIdentity(oldId); 7702 Slog.d(TAG, "Full backup processing complete."); 7703 } 7704 } 7705 7706 @Override 7707 public void fullTransportBackup(String[] pkgNames) { 7708 mContext.enforceCallingPermission(android.Manifest.permission.BACKUP, 7709 "fullTransportBackup"); 7710 7711 final int callingUserHandle = UserHandle.getCallingUserId(); 7712 if (callingUserHandle != UserHandle.USER_OWNER) { 7713 throw new IllegalStateException("Restore supported only for the device owner"); 7714 } 7715 7716 if (DEBUG) { 7717 Slog.d(TAG, "fullTransportBackup()"); 7718 } 7719 7720 AtomicBoolean latch = new AtomicBoolean(false); 7721 PerformFullTransportBackupTask task = new PerformFullTransportBackupTask(null, pkgNames, latch); 7722 (new Thread(task, "full-transport-master")).start(); 7723 synchronized (latch) { 7724 try { 7725 while (latch.get() == false) { 7726 latch.wait(); 7727 } 7728 } catch (InterruptedException e) {} 7729 } 7730 if (DEBUG) { 7731 Slog.d(TAG, "Done with full transport backup."); 7732 } 7733 } 7734 7735 @Override 7736 public void fullRestore(ParcelFileDescriptor fd) { 7737 mContext.enforceCallingPermission(android.Manifest.permission.BACKUP, "fullRestore"); 7738 7739 final int callingUserHandle = UserHandle.getCallingUserId(); 7740 if (callingUserHandle != UserHandle.USER_OWNER) { 7741 throw new IllegalStateException("Restore supported only for the device owner"); 7742 } 7743 7744 long oldId = Binder.clearCallingIdentity(); 7745 7746 try { 7747 // Check whether the device has been provisioned -- we don't handle 7748 // full restores prior to completing the setup process. 7749 if (!deviceIsProvisioned()) { 7750 Slog.i(TAG, "Full restore not permitted before setup"); 7751 return; 7752 } 7753 7754 Slog.i(TAG, "Beginning full restore..."); 7755 7756 FullRestoreParams params = new FullRestoreParams(fd); 7757 final int token = generateToken(); 7758 synchronized (mFullConfirmations) { 7759 mFullConfirmations.put(token, params); 7760 } 7761 7762 // start up the confirmation UI 7763 if (DEBUG) Slog.d(TAG, "Starting restore confirmation UI, token=" + token); 7764 if (!startConfirmationUi(token, FullBackup.FULL_RESTORE_INTENT_ACTION)) { 7765 Slog.e(TAG, "Unable to launch full restore confirmation"); 7766 mFullConfirmations.delete(token); 7767 return; 7768 } 7769 7770 // make sure the screen is lit for the user interaction 7771 mPowerManager.userActivity(SystemClock.uptimeMillis(), false); 7772 7773 // start the confirmation countdown 7774 startConfirmationTimeout(token, params); 7775 7776 // wait for the restore to be performed 7777 if (DEBUG) Slog.d(TAG, "Waiting for full restore completion..."); 7778 waitForCompletion(params); 7779 } finally { 7780 try { 7781 fd.close(); 7782 } catch (IOException e) { 7783 Slog.w(TAG, "Error trying to close fd after full restore: " + e); 7784 } 7785 Binder.restoreCallingIdentity(oldId); 7786 Slog.i(TAG, "Full restore processing complete."); 7787 } 7788 } 7789 7790 boolean startConfirmationUi(int token, String action) { 7791 try { 7792 Intent confIntent = new Intent(action); 7793 confIntent.setClassName("com.android.backupconfirm", 7794 "com.android.backupconfirm.BackupRestoreConfirmation"); 7795 confIntent.putExtra(FullBackup.CONF_TOKEN_INTENT_EXTRA, token); 7796 confIntent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK); 7797 mContext.startActivity(confIntent); 7798 } catch (ActivityNotFoundException e) { 7799 return false; 7800 } 7801 return true; 7802 } 7803 7804 void startConfirmationTimeout(int token, FullParams params) { 7805 if (MORE_DEBUG) Slog.d(TAG, "Posting conf timeout msg after " 7806 + TIMEOUT_FULL_CONFIRMATION + " millis"); 7807 Message msg = mBackupHandler.obtainMessage(MSG_FULL_CONFIRMATION_TIMEOUT, 7808 token, 0, params); 7809 mBackupHandler.sendMessageDelayed(msg, TIMEOUT_FULL_CONFIRMATION); 7810 } 7811 7812 void waitForCompletion(FullParams params) { 7813 synchronized (params.latch) { 7814 while (params.latch.get() == false) { 7815 try { 7816 params.latch.wait(); 7817 } catch (InterruptedException e) { /* never interrupted */ } 7818 } 7819 } 7820 } 7821 7822 void signalFullBackupRestoreCompletion(FullParams params) { 7823 synchronized (params.latch) { 7824 params.latch.set(true); 7825 params.latch.notifyAll(); 7826 } 7827 } 7828 7829 // Confirm that the previously-requested full backup/restore operation can proceed. This 7830 // is used to require a user-facing disclosure about the operation. 7831 @Override 7832 public void acknowledgeFullBackupOrRestore(int token, boolean allow, 7833 String curPassword, String encPpassword, IFullBackupRestoreObserver observer) { 7834 if (DEBUG) Slog.d(TAG, "acknowledgeFullBackupOrRestore : token=" + token 7835 + " allow=" + allow); 7836 7837 // TODO: possibly require not just this signature-only permission, but even 7838 // require that the specific designated confirmation-UI app uid is the caller? 7839 mContext.enforceCallingPermission(android.Manifest.permission.BACKUP, "acknowledgeFullBackupOrRestore"); 7840 7841 long oldId = Binder.clearCallingIdentity(); 7842 try { 7843 7844 FullParams params; 7845 synchronized (mFullConfirmations) { 7846 params = mFullConfirmations.get(token); 7847 if (params != null) { 7848 mBackupHandler.removeMessages(MSG_FULL_CONFIRMATION_TIMEOUT, params); 7849 mFullConfirmations.delete(token); 7850 7851 if (allow) { 7852 final int verb = params instanceof FullBackupParams 7853 ? MSG_RUN_ADB_BACKUP 7854 : MSG_RUN_ADB_RESTORE; 7855 7856 params.observer = observer; 7857 params.curPassword = curPassword; 7858 7859 boolean isEncrypted; 7860 try { 7861 isEncrypted = (mMountService.getEncryptionState() != 7862 IMountService.ENCRYPTION_STATE_NONE); 7863 if (isEncrypted) Slog.w(TAG, "Device is encrypted; forcing enc password"); 7864 } catch (RemoteException e) { 7865 // couldn't contact the mount service; fail "safe" and assume encryption 7866 Slog.e(TAG, "Unable to contact mount service!"); 7867 isEncrypted = true; 7868 } 7869 params.encryptPassword = (isEncrypted) ? curPassword : encPpassword; 7870 7871 if (DEBUG) Slog.d(TAG, "Sending conf message with verb " + verb); 7872 mWakelock.acquire(); 7873 Message msg = mBackupHandler.obtainMessage(verb, params); 7874 mBackupHandler.sendMessage(msg); 7875 } else { 7876 Slog.w(TAG, "User rejected full backup/restore operation"); 7877 // indicate completion without having actually transferred any data 7878 signalFullBackupRestoreCompletion(params); 7879 } 7880 } else { 7881 Slog.w(TAG, "Attempted to ack full backup/restore with invalid token"); 7882 } 7883 } 7884 } finally { 7885 Binder.restoreCallingIdentity(oldId); 7886 } 7887 } 7888 7889 // Enable/disable the backup service 7890 @Override 7891 public void setBackupEnabled(boolean enable) { 7892 mContext.enforceCallingOrSelfPermission(android.Manifest.permission.BACKUP, 7893 "setBackupEnabled"); 7894 7895 Slog.i(TAG, "Backup enabled => " + enable); 7896 7897 long oldId = Binder.clearCallingIdentity(); 7898 try { 7899 boolean wasEnabled = mEnabled; 7900 synchronized (this) { 7901 Settings.Secure.putInt(mContext.getContentResolver(), 7902 Settings.Secure.BACKUP_ENABLED, enable ? 1 : 0); 7903 mEnabled = enable; 7904 } 7905 7906 synchronized (mQueueLock) { 7907 if (enable && !wasEnabled && mProvisioned) { 7908 // if we've just been enabled, start scheduling backup passes 7909 startBackupAlarmsLocked(BACKUP_INTERVAL); 7910 } else if (!enable) { 7911 // No longer enabled, so stop running backups 7912 if (DEBUG) Slog.i(TAG, "Opting out of backup"); 7913 7914 mAlarmManager.cancel(mRunBackupIntent); 7915 7916 // This also constitutes an opt-out, so we wipe any data for 7917 // this device from the backend. We start that process with 7918 // an alarm in order to guarantee wakelock states. 7919 if (wasEnabled && mProvisioned) { 7920 // NOTE: we currently flush every registered transport, not just 7921 // the currently-active one. 7922 HashSet<String> allTransports; 7923 synchronized (mTransports) { 7924 allTransports = new HashSet<String>(mTransports.keySet()); 7925 } 7926 // build the set of transports for which we are posting an init 7927 for (String transport : allTransports) { 7928 recordInitPendingLocked(true, transport); 7929 } 7930 mAlarmManager.set(AlarmManager.RTC_WAKEUP, System.currentTimeMillis(), 7931 mRunInitIntent); 7932 } 7933 } 7934 } 7935 } finally { 7936 Binder.restoreCallingIdentity(oldId); 7937 } 7938 } 7939 7940 // Enable/disable automatic restore of app data at install time 7941 public void setAutoRestore(boolean doAutoRestore) { 7942 mContext.enforceCallingOrSelfPermission(android.Manifest.permission.BACKUP, 7943 "setAutoRestore"); 7944 7945 Slog.i(TAG, "Auto restore => " + doAutoRestore); 7946 7947 synchronized (this) { 7948 Settings.Secure.putInt(mContext.getContentResolver(), 7949 Settings.Secure.BACKUP_AUTO_RESTORE, doAutoRestore ? 1 : 0); 7950 mAutoRestore = doAutoRestore; 7951 } 7952 } 7953 7954 // Mark the backup service as having been provisioned 7955 public void setBackupProvisioned(boolean available) { 7956 mContext.enforceCallingOrSelfPermission(android.Manifest.permission.BACKUP, 7957 "setBackupProvisioned"); 7958 /* 7959 * This is now a no-op; provisioning is simply the device's own setup state. 7960 */ 7961 } 7962 7963 private void startBackupAlarmsLocked(long delayBeforeFirstBackup) { 7964 // We used to use setInexactRepeating(), but that may be linked to 7965 // backups running at :00 more often than not, creating load spikes. 7966 // Schedule at an exact time for now, and also add a bit of "fuzz". 7967 7968 Random random = new Random(); 7969 long when = System.currentTimeMillis() + delayBeforeFirstBackup + 7970 random.nextInt(FUZZ_MILLIS); 7971 mAlarmManager.setRepeating(AlarmManager.RTC_WAKEUP, when, 7972 BACKUP_INTERVAL + random.nextInt(FUZZ_MILLIS), mRunBackupIntent); 7973 mNextBackupPass = when; 7974 } 7975 7976 // Report whether the backup mechanism is currently enabled 7977 public boolean isBackupEnabled() { 7978 mContext.enforceCallingOrSelfPermission(android.Manifest.permission.BACKUP, "isBackupEnabled"); 7979 return mEnabled; // no need to synchronize just to read it 7980 } 7981 7982 // Report the name of the currently active transport 7983 public String getCurrentTransport() { 7984 mContext.enforceCallingOrSelfPermission(android.Manifest.permission.BACKUP, 7985 "getCurrentTransport"); 7986 if (MORE_DEBUG) Slog.v(TAG, "... getCurrentTransport() returning " + mCurrentTransport); 7987 return mCurrentTransport; 7988 } 7989 7990 // Report all known, available backup transports 7991 public String[] listAllTransports() { 7992 mContext.enforceCallingOrSelfPermission(android.Manifest.permission.BACKUP, "listAllTransports"); 7993 7994 String[] list = null; 7995 ArrayList<String> known = new ArrayList<String>(); 7996 for (Map.Entry<String, IBackupTransport> entry : mTransports.entrySet()) { 7997 if (entry.getValue() != null) { 7998 known.add(entry.getKey()); 7999 } 8000 } 8001 8002 if (known.size() > 0) { 8003 list = new String[known.size()]; 8004 known.toArray(list); 8005 } 8006 return list; 8007 } 8008 8009 // Select which transport to use for the next backup operation. If the given 8010 // name is not one of the available transports, no action is taken and the method 8011 // returns null. 8012 public String selectBackupTransport(String transport) { 8013 mContext.enforceCallingOrSelfPermission(android.Manifest.permission.BACKUP, "selectBackupTransport"); 8014 8015 synchronized (mTransports) { 8016 String prevTransport = null; 8017 if (mTransports.get(transport) != null) { 8018 prevTransport = mCurrentTransport; 8019 mCurrentTransport = transport; 8020 Settings.Secure.putString(mContext.getContentResolver(), 8021 Settings.Secure.BACKUP_TRANSPORT, transport); 8022 Slog.v(TAG, "selectBackupTransport() set " + mCurrentTransport 8023 + " returning " + prevTransport); 8024 } else { 8025 Slog.w(TAG, "Attempt to select unavailable transport " + transport); 8026 } 8027 return prevTransport; 8028 } 8029 } 8030 8031 // Supply the configuration Intent for the given transport. If the name is not one 8032 // of the available transports, or if the transport does not supply any configuration 8033 // UI, the method returns null. 8034 public Intent getConfigurationIntent(String transportName) { 8035 mContext.enforceCallingOrSelfPermission(android.Manifest.permission.BACKUP, 8036 "getConfigurationIntent"); 8037 8038 synchronized (mTransports) { 8039 final IBackupTransport transport = mTransports.get(transportName); 8040 if (transport != null) { 8041 try { 8042 final Intent intent = transport.configurationIntent(); 8043 if (MORE_DEBUG) Slog.d(TAG, "getConfigurationIntent() returning config intent " 8044 + intent); 8045 return intent; 8046 } catch (RemoteException e) { 8047 /* fall through to return null */ 8048 } 8049 } 8050 } 8051 8052 return null; 8053 } 8054 8055 // Supply the configuration summary string for the given transport. If the name is 8056 // not one of the available transports, or if the transport does not supply any 8057 // summary / destination string, the method can return null. 8058 // 8059 // This string is used VERBATIM as the summary text of the relevant Settings item! 8060 public String getDestinationString(String transportName) { 8061 mContext.enforceCallingOrSelfPermission(android.Manifest.permission.BACKUP, 8062 "getDestinationString"); 8063 8064 synchronized (mTransports) { 8065 final IBackupTransport transport = mTransports.get(transportName); 8066 if (transport != null) { 8067 try { 8068 final String text = transport.currentDestinationString(); 8069 if (MORE_DEBUG) Slog.d(TAG, "getDestinationString() returning " + text); 8070 return text; 8071 } catch (RemoteException e) { 8072 /* fall through to return null */ 8073 } 8074 } 8075 } 8076 8077 return null; 8078 } 8079 8080 // Callback: a requested backup agent has been instantiated. This should only 8081 // be called from the Activity Manager. 8082 public void agentConnected(String packageName, IBinder agentBinder) { 8083 synchronized(mAgentConnectLock) { 8084 if (Binder.getCallingUid() == Process.SYSTEM_UID) { 8085 Slog.d(TAG, "agentConnected pkg=" + packageName + " agent=" + agentBinder); 8086 IBackupAgent agent = IBackupAgent.Stub.asInterface(agentBinder); 8087 mConnectedAgent = agent; 8088 mConnecting = false; 8089 } else { 8090 Slog.w(TAG, "Non-system process uid=" + Binder.getCallingUid() 8091 + " claiming agent connected"); 8092 } 8093 mAgentConnectLock.notifyAll(); 8094 } 8095 } 8096 8097 // Callback: a backup agent has failed to come up, or has unexpectedly quit. 8098 // If the agent failed to come up in the first place, the agentBinder argument 8099 // will be null. This should only be called from the Activity Manager. 8100 public void agentDisconnected(String packageName) { 8101 // TODO: handle backup being interrupted 8102 synchronized(mAgentConnectLock) { 8103 if (Binder.getCallingUid() == Process.SYSTEM_UID) { 8104 mConnectedAgent = null; 8105 mConnecting = false; 8106 } else { 8107 Slog.w(TAG, "Non-system process uid=" + Binder.getCallingUid() 8108 + " claiming agent disconnected"); 8109 } 8110 mAgentConnectLock.notifyAll(); 8111 } 8112 } 8113 8114 // An application being installed will need a restore pass, then the Package Manager 8115 // will need to be told when the restore is finished. 8116 public void restoreAtInstall(String packageName, int token) { 8117 if (Binder.getCallingUid() != Process.SYSTEM_UID) { 8118 Slog.w(TAG, "Non-system process uid=" + Binder.getCallingUid() 8119 + " attemping install-time restore"); 8120 return; 8121 } 8122 8123 boolean skip = false; 8124 8125 long restoreSet = getAvailableRestoreToken(packageName); 8126 if (DEBUG) Slog.v(TAG, "restoreAtInstall pkg=" + packageName 8127 + " token=" + Integer.toHexString(token) 8128 + " restoreSet=" + Long.toHexString(restoreSet)); 8129 if (restoreSet == 0) { 8130 if (MORE_DEBUG) Slog.i(TAG, "No restore set"); 8131 skip = true; 8132 } 8133 8134 // Do we have a transport to fetch data for us? 8135 IBackupTransport transport = getTransport(mCurrentTransport); 8136 if (transport == null) { 8137 if (DEBUG) Slog.w(TAG, "No transport"); 8138 skip = true; 8139 } 8140 8141 if (!skip && mAutoRestore && mProvisioned) { 8142 try { 8143 // okay, we're going to attempt a restore of this package from this restore set. 8144 // The eventual message back into the Package Manager to run the post-install 8145 // steps for 'token' will be issued from the restore handling code. 8146 8147 // This can throw and so *must* happen before the wakelock is acquired 8148 String dirName = transport.transportDirName(); 8149 8150 // We can use a synthetic PackageInfo here because: 8151 // 1. We know it's valid, since the Package Manager supplied the name 8152 // 2. Only the packageName field will be used by the restore code 8153 PackageInfo pkg = new PackageInfo(); 8154 pkg.packageName = packageName; 8155 8156 mWakelock.acquire(); 8157 if (MORE_DEBUG) { 8158 Slog.d(TAG, "Restore at install of " + packageName); 8159 } 8160 Message msg = mBackupHandler.obtainMessage(MSG_RUN_RESTORE); 8161 msg.obj = new RestoreParams(transport, dirName, null, 8162 restoreSet, pkg, token); 8163 mBackupHandler.sendMessage(msg); 8164 } catch (RemoteException e) { 8165 // Binding to the transport broke; back off and proceed with the installation. 8166 Slog.e(TAG, "Unable to contact transport"); 8167 skip = true; 8168 } 8169 } 8170 8171 if (skip) { 8172 // Auto-restore disabled or no way to attempt a restore; just tell the Package 8173 // Manager to proceed with the post-install handling for this package. 8174 if (DEBUG) Slog.v(TAG, "Skipping"); 8175 try { 8176 mPackageManagerBinder.finishPackageInstall(token); 8177 } catch (RemoteException e) { /* can't happen */ } 8178 } 8179 } 8180 8181 // Hand off a restore session 8182 public IRestoreSession beginRestoreSession(String packageName, String transport) { 8183 if (DEBUG) Slog.v(TAG, "beginRestoreSession: pkg=" + packageName 8184 + " transport=" + transport); 8185 8186 boolean needPermission = true; 8187 if (transport == null) { 8188 transport = mCurrentTransport; 8189 8190 if (packageName != null) { 8191 PackageInfo app = null; 8192 try { 8193 app = mPackageManager.getPackageInfo(packageName, 0); 8194 } catch (NameNotFoundException nnf) { 8195 Slog.w(TAG, "Asked to restore nonexistent pkg " + packageName); 8196 throw new IllegalArgumentException("Package " + packageName + " not found"); 8197 } 8198 8199 if (app.applicationInfo.uid == Binder.getCallingUid()) { 8200 // So: using the current active transport, and the caller has asked 8201 // that its own package will be restored. In this narrow use case 8202 // we do not require the caller to hold the permission. 8203 needPermission = false; 8204 } 8205 } 8206 } 8207 8208 if (needPermission) { 8209 mContext.enforceCallingOrSelfPermission(android.Manifest.permission.BACKUP, 8210 "beginRestoreSession"); 8211 } else { 8212 if (DEBUG) Slog.d(TAG, "restoring self on current transport; no permission needed"); 8213 } 8214 8215 synchronized(this) { 8216 if (mActiveRestoreSession != null) { 8217 Slog.d(TAG, "Restore session requested but one already active"); 8218 return null; 8219 } 8220 mActiveRestoreSession = new ActiveRestoreSession(packageName, transport); 8221 mBackupHandler.sendEmptyMessageDelayed(MSG_RESTORE_TIMEOUT, TIMEOUT_RESTORE_INTERVAL); 8222 } 8223 return mActiveRestoreSession; 8224 } 8225 8226 void clearRestoreSession(ActiveRestoreSession currentSession) { 8227 synchronized(this) { 8228 if (currentSession != mActiveRestoreSession) { 8229 Slog.e(TAG, "ending non-current restore session"); 8230 } else { 8231 if (DEBUG) Slog.v(TAG, "Clearing restore session and halting timeout"); 8232 mActiveRestoreSession = null; 8233 mBackupHandler.removeMessages(MSG_RESTORE_TIMEOUT); 8234 } 8235 } 8236 } 8237 8238 // Note that a currently-active backup agent has notified us that it has 8239 // completed the given outstanding asynchronous backup/restore operation. 8240 @Override 8241 public void opComplete(int token) { 8242 if (MORE_DEBUG) Slog.v(TAG, "opComplete: " + Integer.toHexString(token)); 8243 Operation op = null; 8244 synchronized (mCurrentOpLock) { 8245 op = mCurrentOperations.get(token); 8246 if (op != null) { 8247 op.state = OP_ACKNOWLEDGED; 8248 } 8249 mCurrentOpLock.notifyAll(); 8250 } 8251 8252 // The completion callback, if any, is invoked on the handler 8253 if (op != null && op.callback != null) { 8254 Message msg = mBackupHandler.obtainMessage(MSG_OP_COMPLETE, op.callback); 8255 mBackupHandler.sendMessage(msg); 8256 } 8257 } 8258 8259 // ----- Restore session ----- 8260 8261 class ActiveRestoreSession extends IRestoreSession.Stub { 8262 private static final String TAG = "RestoreSession"; 8263 8264 private String mPackageName; 8265 private IBackupTransport mRestoreTransport = null; 8266 RestoreSet[] mRestoreSets = null; 8267 boolean mEnded = false; 8268 8269 ActiveRestoreSession(String packageName, String transport) { 8270 mPackageName = packageName; 8271 mRestoreTransport = getTransport(transport); 8272 } 8273 8274 // --- Binder interface --- 8275 public synchronized int getAvailableRestoreSets(IRestoreObserver observer) { 8276 mContext.enforceCallingOrSelfPermission(android.Manifest.permission.BACKUP, 8277 "getAvailableRestoreSets"); 8278 if (observer == null) { 8279 throw new IllegalArgumentException("Observer must not be null"); 8280 } 8281 8282 if (mEnded) { 8283 throw new IllegalStateException("Restore session already ended"); 8284 } 8285 8286 long oldId = Binder.clearCallingIdentity(); 8287 try { 8288 if (mRestoreTransport == null) { 8289 Slog.w(TAG, "Null transport getting restore sets"); 8290 return -1; 8291 } 8292 // spin off the transport request to our service thread 8293 mWakelock.acquire(); 8294 Message msg = mBackupHandler.obtainMessage(MSG_RUN_GET_RESTORE_SETS, 8295 new RestoreGetSetsParams(mRestoreTransport, this, observer)); 8296 mBackupHandler.sendMessage(msg); 8297 return 0; 8298 } catch (Exception e) { 8299 Slog.e(TAG, "Error in getAvailableRestoreSets", e); 8300 return -1; 8301 } finally { 8302 Binder.restoreCallingIdentity(oldId); 8303 } 8304 } 8305 8306 public synchronized int restoreAll(long token, IRestoreObserver observer) { 8307 mContext.enforceCallingOrSelfPermission(android.Manifest.permission.BACKUP, 8308 "performRestore"); 8309 8310 if (DEBUG) Slog.d(TAG, "restoreAll token=" + Long.toHexString(token) 8311 + " observer=" + observer); 8312 8313 if (mEnded) { 8314 throw new IllegalStateException("Restore session already ended"); 8315 } 8316 8317 if (mRestoreTransport == null || mRestoreSets == null) { 8318 Slog.e(TAG, "Ignoring restoreAll() with no restore set"); 8319 return -1; 8320 } 8321 8322 if (mPackageName != null) { 8323 Slog.e(TAG, "Ignoring restoreAll() on single-package session"); 8324 return -1; 8325 } 8326 8327 String dirName; 8328 try { 8329 dirName = mRestoreTransport.transportDirName(); 8330 } catch (RemoteException e) { 8331 // Transport went AWOL; fail. 8332 Slog.e(TAG, "Unable to contact transport for restore"); 8333 return -1; 8334 } 8335 8336 synchronized (mQueueLock) { 8337 for (int i = 0; i < mRestoreSets.length; i++) { 8338 if (token == mRestoreSets[i].token) { 8339 long oldId = Binder.clearCallingIdentity(); 8340 mWakelock.acquire(); 8341 if (MORE_DEBUG) { 8342 Slog.d(TAG, "restoreAll() kicking off"); 8343 } 8344 Message msg = mBackupHandler.obtainMessage(MSG_RUN_RESTORE); 8345 msg.obj = new RestoreParams(mRestoreTransport, dirName, 8346 observer, token); 8347 mBackupHandler.sendMessage(msg); 8348 Binder.restoreCallingIdentity(oldId); 8349 return 0; 8350 } 8351 } 8352 } 8353 8354 Slog.w(TAG, "Restore token " + Long.toHexString(token) + " not found"); 8355 return -1; 8356 } 8357 8358 // Restores of more than a single package are treated as 'system' restores 8359 public synchronized int restoreSome(long token, IRestoreObserver observer, 8360 String[] packages) { 8361 mContext.enforceCallingOrSelfPermission(android.Manifest.permission.BACKUP, 8362 "performRestore"); 8363 8364 if (DEBUG) { 8365 StringBuilder b = new StringBuilder(128); 8366 b.append("restoreSome token="); 8367 b.append(Long.toHexString(token)); 8368 b.append(" observer="); 8369 b.append(observer.toString()); 8370 b.append(" packages="); 8371 if (packages == null) { 8372 b.append("null"); 8373 } else { 8374 b.append('{'); 8375 boolean first = true; 8376 for (String s : packages) { 8377 if (!first) { 8378 b.append(", "); 8379 } else first = false; 8380 b.append(s); 8381 } 8382 b.append('}'); 8383 } 8384 Slog.d(TAG, b.toString()); 8385 } 8386 8387 if (mEnded) { 8388 throw new IllegalStateException("Restore session already ended"); 8389 } 8390 8391 if (mRestoreTransport == null || mRestoreSets == null) { 8392 Slog.e(TAG, "Ignoring restoreAll() with no restore set"); 8393 return -1; 8394 } 8395 8396 if (mPackageName != null) { 8397 Slog.e(TAG, "Ignoring restoreAll() on single-package session"); 8398 return -1; 8399 } 8400 8401 String dirName; 8402 try { 8403 dirName = mRestoreTransport.transportDirName(); 8404 } catch (RemoteException e) { 8405 // Transport went AWOL; fail. 8406 Slog.e(TAG, "Unable to contact transport for restore"); 8407 return -1; 8408 } 8409 8410 synchronized (mQueueLock) { 8411 for (int i = 0; i < mRestoreSets.length; i++) { 8412 if (token == mRestoreSets[i].token) { 8413 long oldId = Binder.clearCallingIdentity(); 8414 mWakelock.acquire(); 8415 if (MORE_DEBUG) { 8416 Slog.d(TAG, "restoreSome() of " + packages.length + " packages"); 8417 } 8418 Message msg = mBackupHandler.obtainMessage(MSG_RUN_RESTORE); 8419 msg.obj = new RestoreParams(mRestoreTransport, dirName, observer, token, 8420 packages, packages.length > 1); 8421 mBackupHandler.sendMessage(msg); 8422 Binder.restoreCallingIdentity(oldId); 8423 return 0; 8424 } 8425 } 8426 } 8427 8428 Slog.w(TAG, "Restore token " + Long.toHexString(token) + " not found"); 8429 return -1; 8430 } 8431 8432 public synchronized int restorePackage(String packageName, IRestoreObserver observer) { 8433 if (DEBUG) Slog.v(TAG, "restorePackage pkg=" + packageName + " obs=" + observer); 8434 8435 if (mEnded) { 8436 throw new IllegalStateException("Restore session already ended"); 8437 } 8438 8439 if (mPackageName != null) { 8440 if (! mPackageName.equals(packageName)) { 8441 Slog.e(TAG, "Ignoring attempt to restore pkg=" + packageName 8442 + " on session for package " + mPackageName); 8443 return -1; 8444 } 8445 } 8446 8447 PackageInfo app = null; 8448 try { 8449 app = mPackageManager.getPackageInfo(packageName, 0); 8450 } catch (NameNotFoundException nnf) { 8451 Slog.w(TAG, "Asked to restore nonexistent pkg " + packageName); 8452 return -1; 8453 } 8454 8455 // If the caller is not privileged and is not coming from the target 8456 // app's uid, throw a permission exception back to the caller. 8457 int perm = mContext.checkPermission(android.Manifest.permission.BACKUP, 8458 Binder.getCallingPid(), Binder.getCallingUid()); 8459 if ((perm == PackageManager.PERMISSION_DENIED) && 8460 (app.applicationInfo.uid != Binder.getCallingUid())) { 8461 Slog.w(TAG, "restorePackage: bad packageName=" + packageName 8462 + " or calling uid=" + Binder.getCallingUid()); 8463 throw new SecurityException("No permission to restore other packages"); 8464 } 8465 8466 // If the package has no backup agent, we obviously cannot proceed 8467 if (app.applicationInfo.backupAgentName == null) { 8468 Slog.w(TAG, "Asked to restore package " + packageName + " with no agent"); 8469 return -1; 8470 } 8471 8472 // So far so good; we're allowed to try to restore this package. Now 8473 // check whether there is data for it in the current dataset, falling back 8474 // to the ancestral dataset if not. 8475 long token = getAvailableRestoreToken(packageName); 8476 8477 // If we didn't come up with a place to look -- no ancestral dataset and 8478 // the app has never been backed up from this device -- there's nothing 8479 // to do but return failure. 8480 if (token == 0) { 8481 if (DEBUG) Slog.w(TAG, "No data available for this package; not restoring"); 8482 return -1; 8483 } 8484 8485 String dirName; 8486 try { 8487 dirName = mRestoreTransport.transportDirName(); 8488 } catch (RemoteException e) { 8489 // Transport went AWOL; fail. 8490 Slog.e(TAG, "Unable to contact transport for restore"); 8491 return -1; 8492 } 8493 8494 // Ready to go: enqueue the restore request and claim success 8495 long oldId = Binder.clearCallingIdentity(); 8496 mWakelock.acquire(); 8497 if (MORE_DEBUG) { 8498 Slog.d(TAG, "restorePackage() : " + packageName); 8499 } 8500 Message msg = mBackupHandler.obtainMessage(MSG_RUN_RESTORE); 8501 msg.obj = new RestoreParams(mRestoreTransport, dirName, 8502 observer, token, app, 0); 8503 mBackupHandler.sendMessage(msg); 8504 Binder.restoreCallingIdentity(oldId); 8505 return 0; 8506 } 8507 8508 // Posted to the handler to tear down a restore session in a cleanly synchronized way 8509 class EndRestoreRunnable implements Runnable { 8510 BackupManagerService mBackupManager; 8511 ActiveRestoreSession mSession; 8512 8513 EndRestoreRunnable(BackupManagerService manager, ActiveRestoreSession session) { 8514 mBackupManager = manager; 8515 mSession = session; 8516 } 8517 8518 public void run() { 8519 // clean up the session's bookkeeping 8520 synchronized (mSession) { 8521 try { 8522 if (mSession.mRestoreTransport != null) { 8523 mSession.mRestoreTransport.finishRestore(); 8524 } 8525 } catch (Exception e) { 8526 Slog.e(TAG, "Error in finishRestore", e); 8527 } finally { 8528 mSession.mRestoreTransport = null; 8529 mSession.mEnded = true; 8530 } 8531 } 8532 8533 // clean up the BackupManagerImpl side of the bookkeeping 8534 // and cancel any pending timeout message 8535 mBackupManager.clearRestoreSession(mSession); 8536 } 8537 } 8538 8539 public synchronized void endRestoreSession() { 8540 if (DEBUG) Slog.d(TAG, "endRestoreSession"); 8541 8542 if (mEnded) { 8543 throw new IllegalStateException("Restore session already ended"); 8544 } 8545 8546 mBackupHandler.post(new EndRestoreRunnable(BackupManagerService.this, this)); 8547 } 8548 } 8549 8550 @Override 8551 public void dump(FileDescriptor fd, PrintWriter pw, String[] args) { 8552 mContext.enforceCallingOrSelfPermission(android.Manifest.permission.DUMP, TAG); 8553 8554 long identityToken = Binder.clearCallingIdentity(); 8555 try { 8556 if (args != null) { 8557 for (String arg : args) { 8558 if ("-h".equals(arg)) { 8559 pw.println("'dumpsys backup' optional arguments:"); 8560 pw.println(" -h : this help text"); 8561 pw.println(" a[gents] : dump information about defined backup agents"); 8562 return; 8563 } else if ("agents".startsWith(arg)) { 8564 dumpAgents(pw); 8565 return; 8566 } 8567 } 8568 } 8569 dumpInternal(pw); 8570 } finally { 8571 Binder.restoreCallingIdentity(identityToken); 8572 } 8573 } 8574 8575 private void dumpAgents(PrintWriter pw) { 8576 List<PackageInfo> agentPackages = allAgentPackages(); 8577 pw.println("Defined backup agents:"); 8578 for (PackageInfo pkg : agentPackages) { 8579 pw.print(" "); 8580 pw.print(pkg.packageName); pw.println(':'); 8581 pw.print(" "); pw.println(pkg.applicationInfo.backupAgentName); 8582 } 8583 } 8584 8585 private void dumpInternal(PrintWriter pw) { 8586 synchronized (mQueueLock) { 8587 pw.println("Backup Manager is " + (mEnabled ? "enabled" : "disabled") 8588 + " / " + (!mProvisioned ? "not " : "") + "provisioned / " 8589 + (this.mPendingInits.size() == 0 ? "not " : "") + "pending init"); 8590 pw.println("Auto-restore is " + (mAutoRestore ? "enabled" : "disabled")); 8591 if (mBackupRunning) pw.println("Backup currently running"); 8592 pw.println("Last backup pass started: " + mLastBackupPass 8593 + " (now = " + System.currentTimeMillis() + ')'); 8594 pw.println(" next scheduled: " + mNextBackupPass); 8595 8596 pw.println("Available transports:"); 8597 for (String t : listAllTransports()) { 8598 pw.println((t.equals(mCurrentTransport) ? " * " : " ") + t); 8599 try { 8600 IBackupTransport transport = getTransport(t); 8601 File dir = new File(mBaseStateDir, transport.transportDirName()); 8602 pw.println(" destination: " + transport.currentDestinationString()); 8603 pw.println(" intent: " + transport.configurationIntent()); 8604 for (File f : dir.listFiles()) { 8605 pw.println(" " + f.getName() + " - " + f.length() + " state bytes"); 8606 } 8607 } catch (Exception e) { 8608 Slog.e(TAG, "Error in transport", e); 8609 pw.println(" Error: " + e); 8610 } 8611 } 8612 8613 pw.println("Pending init: " + mPendingInits.size()); 8614 for (String s : mPendingInits) { 8615 pw.println(" " + s); 8616 } 8617 8618 if (DEBUG_BACKUP_TRACE) { 8619 synchronized (mBackupTrace) { 8620 if (!mBackupTrace.isEmpty()) { 8621 pw.println("Most recent backup trace:"); 8622 for (String s : mBackupTrace) { 8623 pw.println(" " + s); 8624 } 8625 } 8626 } 8627 } 8628 8629 int N = mBackupParticipants.size(); 8630 pw.println("Participants:"); 8631 for (int i=0; i<N; i++) { 8632 int uid = mBackupParticipants.keyAt(i); 8633 pw.print(" uid: "); 8634 pw.println(uid); 8635 HashSet<String> participants = mBackupParticipants.valueAt(i); 8636 for (String app: participants) { 8637 pw.println(" " + app); 8638 } 8639 } 8640 8641 pw.println("Ancestral packages: " 8642 + (mAncestralPackages == null ? "none" : mAncestralPackages.size())); 8643 if (mAncestralPackages != null) { 8644 for (String pkg : mAncestralPackages) { 8645 pw.println(" " + pkg); 8646 } 8647 } 8648 8649 pw.println("Ever backed up: " + mEverStoredApps.size()); 8650 for (String pkg : mEverStoredApps) { 8651 pw.println(" " + pkg); 8652 } 8653 8654 pw.println("Pending backup: " + mPendingBackups.size()); 8655 for (BackupRequest req : mPendingBackups.values()) { 8656 pw.println(" " + req); 8657 } 8658 } 8659 } 8660} 8661