1 /* 2 * Copyright (C) 2007 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 17 package com.android.server; 18 19 import com.android.internal.app.IMediaContainerService; 20 import com.android.internal.util.XmlUtils; 21 import com.android.server.am.ActivityManagerService; 22 import com.android.server.pm.PackageManagerService; 23 import com.android.server.NativeDaemonConnector.Command; 24 25 import android.Manifest; 26 import android.content.BroadcastReceiver; 27 import android.content.ComponentName; 28 import android.content.Context; 29 import android.content.Intent; 30 import android.content.IntentFilter; 31 import android.content.ServiceConnection; 32 import android.content.pm.PackageManager; 33 import android.content.res.ObbInfo; 34 import android.content.res.Resources; 35 import android.content.res.TypedArray; 36 import android.content.res.XmlResourceParser; 37 import android.hardware.usb.UsbManager; 38 import android.net.Uri; 39 import android.os.Binder; 40 import android.os.Environment; 41 import android.os.Handler; 42 import android.os.HandlerThread; 43 import android.os.IBinder; 44 import android.os.Looper; 45 import android.os.Message; 46 import android.os.Parcelable; 47 import android.os.RemoteException; 48 import android.os.ServiceManager; 49 import android.os.SystemClock; 50 import android.os.SystemProperties; 51 import android.os.UserId; 52 import android.os.storage.IMountService; 53 import android.os.storage.IMountServiceListener; 54 import android.os.storage.IMountShutdownObserver; 55 import android.os.storage.IObbActionListener; 56 import android.os.storage.OnObbStateChangeListener; 57 import android.os.storage.StorageResultCode; 58 import android.os.storage.StorageVolume; 59 import android.text.TextUtils; 60 import android.util.AttributeSet; 61 import android.util.Slog; 62 import android.util.Xml; 63 64 import org.xmlpull.v1.XmlPullParser; 65 import org.xmlpull.v1.XmlPullParserException; 66 67 import java.io.FileDescriptor; 68 import java.io.IOException; 69 import java.io.PrintWriter; 70 import java.math.BigInteger; 71 import java.security.NoSuchAlgorithmException; 72 import java.security.spec.InvalidKeySpecException; 73 import java.security.spec.KeySpec; 74 import java.util.ArrayList; 75 import java.util.HashMap; 76 import java.util.HashSet; 77 import java.util.Iterator; 78 import java.util.LinkedList; 79 import java.util.List; 80 import java.util.Map; 81 import java.util.Map.Entry; 82 import java.util.concurrent.CountDownLatch; 83 import java.util.concurrent.TimeUnit; 84 import java.util.Set; 85 86 import javax.crypto.SecretKey; 87 import javax.crypto.SecretKeyFactory; 88 import javax.crypto.spec.PBEKeySpec; 89 90 /** 91 * MountService implements back-end services for platform storage 92 * management. 93 * @hide - Applications should use android.os.storage.StorageManager 94 * to access the MountService. 95 */ 96 class MountService extends IMountService.Stub 97 implements INativeDaemonConnectorCallbacks, Watchdog.Monitor { 98 99 private static final boolean LOCAL_LOGD = false; 100 private static final boolean DEBUG_UNMOUNT = false; 101 private static final boolean DEBUG_EVENTS = false; 102 private static final boolean DEBUG_OBB = false; 103 104 // Disable this since it messes up long-running cryptfs operations. 105 private static final boolean WATCHDOG_ENABLE = false; 106 107 private static final String TAG = "MountService"; 108 109 private static final String VOLD_TAG = "VoldConnector"; 110 111 /** Maximum number of ASEC containers allowed to be mounted. */ 112 private static final int MAX_CONTAINERS = 250; 113 114 /* 115 * Internal vold volume state constants 116 */ 117 class VolumeState { 118 public static final int Init = -1; 119 public static final int NoMedia = 0; 120 public static final int Idle = 1; 121 public static final int Pending = 2; 122 public static final int Checking = 3; 123 public static final int Mounted = 4; 124 public static final int Unmounting = 5; 125 public static final int Formatting = 6; 126 public static final int Shared = 7; 127 public static final int SharedMnt = 8; 128 } 129 130 /* 131 * Internal vold response code constants 132 */ 133 class VoldResponseCode { 134 /* 135 * 100 series - Requestion action was initiated; expect another reply 136 * before proceeding with a new command. 137 */ 138 public static final int VolumeListResult = 110; 139 public static final int AsecListResult = 111; 140 public static final int StorageUsersListResult = 112; 141 142 /* 143 * 200 series - Requestion action has been successfully completed. 144 */ 145 public static final int ShareStatusResult = 210; 146 public static final int AsecPathResult = 211; 147 public static final int ShareEnabledResult = 212; 148 149 /* 150 * 400 series - Command was accepted, but the requested action 151 * did not take place. 152 */ 153 public static final int OpFailedNoMedia = 401; 154 public static final int OpFailedMediaBlank = 402; 155 public static final int OpFailedMediaCorrupt = 403; 156 public static final int OpFailedVolNotMounted = 404; 157 public static final int OpFailedStorageBusy = 405; 158 public static final int OpFailedStorageNotFound = 406; 159 160 /* 161 * 600 series - Unsolicited broadcasts. 162 */ 163 public static final int VolumeStateChange = 605; 164 public static final int VolumeDiskInserted = 630; 165 public static final int VolumeDiskRemoved = 631; 166 public static final int VolumeBadRemoval = 632; 167 } 168 169 private Context mContext; 170 private NativeDaemonConnector mConnector; 171 private final ArrayList<StorageVolume> mVolumes = new ArrayList<StorageVolume>(); 172 private StorageVolume mPrimaryVolume; 173 private final HashMap<String, String> mVolumeStates = new HashMap<String, String>(); 174 private final HashMap<String, StorageVolume> mVolumeMap = new HashMap<String, StorageVolume>(); 175 private String mExternalStoragePath; 176 private PackageManagerService mPms; 177 private boolean mUmsEnabling; 178 private boolean mUmsAvailable = false; 179 // Used as a lock for methods that register/unregister listeners. 180 final private ArrayList<MountServiceBinderListener> mListeners = 181 new ArrayList<MountServiceBinderListener>(); 182 private boolean mBooted = false; 183 private CountDownLatch mConnectedSignal = new CountDownLatch(1); 184 private CountDownLatch mAsecsScanned = new CountDownLatch(1); 185 private boolean mSendUmsConnectedOnBoot = false; 186 // true if we should fake MEDIA_MOUNTED state for external storage 187 private boolean mEmulateExternalStorage = false; 188 189 /** 190 * Private hash of currently mounted secure containers. 191 * Used as a lock in methods to manipulate secure containers. 192 */ 193 final private HashSet<String> mAsecMountSet = new HashSet<String>(); 194 195 /** 196 * The size of the crypto algorithm key in bits for OBB files. Currently 197 * Twofish is used which takes 128-bit keys. 198 */ 199 private static final int CRYPTO_ALGORITHM_KEY_SIZE = 128; 200 201 /** 202 * The number of times to run SHA1 in the PBKDF2 function for OBB files. 203 * 1024 is reasonably secure and not too slow. 204 */ 205 private static final int PBKDF2_HASH_ROUNDS = 1024; 206 207 /** 208 * Mounted OBB tracking information. Used to track the current state of all 209 * OBBs. 210 */ 211 final private Map<IBinder, List<ObbState>> mObbMounts = new HashMap<IBinder, List<ObbState>>(); 212 final private Map<String, ObbState> mObbPathToStateMap = new HashMap<String, ObbState>(); 213 214 class ObbState implements IBinder.DeathRecipient { 215 public ObbState(String filename, int callerUid, IObbActionListener token, int nonce) 216 throws RemoteException { 217 this.filename = filename; 218 this.callerUid = callerUid; 219 this.token = token; 220 this.nonce = nonce; 221 } 222 223 // OBB source filename 224 String filename; 225 226 // Binder.callingUid() 227 final public int callerUid; 228 229 // Token of remote Binder caller 230 final IObbActionListener token; 231 232 // Identifier to pass back to the token 233 final int nonce; 234 235 public IBinder getBinder() { 236 return token.asBinder(); 237 } 238 239 @Override 240 public void binderDied() { 241 ObbAction action = new UnmountObbAction(this, true); 242 mObbActionHandler.sendMessage(mObbActionHandler.obtainMessage(OBB_RUN_ACTION, action)); 243 } 244 245 public void link() throws RemoteException { 246 getBinder().linkToDeath(this, 0); 247 } 248 249 public void unlink() { 250 getBinder().unlinkToDeath(this, 0); 251 } 252 253 @Override 254 public String toString() { 255 StringBuilder sb = new StringBuilder("ObbState{"); 256 sb.append("filename="); 257 sb.append(filename); 258 sb.append(",token="); 259 sb.append(token.toString()); 260 sb.append(",callerUid="); 261 sb.append(callerUid); 262 sb.append('}'); 263 return sb.toString(); 264 } 265 } 266 267 // OBB Action Handler 268 final private ObbActionHandler mObbActionHandler; 269 270 // OBB action handler messages 271 private static final int OBB_RUN_ACTION = 1; 272 private static final int OBB_MCS_BOUND = 2; 273 private static final int OBB_MCS_UNBIND = 3; 274 private static final int OBB_MCS_RECONNECT = 4; 275 private static final int OBB_FLUSH_MOUNT_STATE = 5; 276 277 /* 278 * Default Container Service information 279 */ 280 static final ComponentName DEFAULT_CONTAINER_COMPONENT = new ComponentName( 281 "com.android.defcontainer", "com.android.defcontainer.DefaultContainerService"); 282 283 final private DefaultContainerConnection mDefContainerConn = new DefaultContainerConnection(); 284 285 class DefaultContainerConnection implements ServiceConnection { 286 public void onServiceConnected(ComponentName name, IBinder service) { 287 if (DEBUG_OBB) 288 Slog.i(TAG, "onServiceConnected"); 289 IMediaContainerService imcs = IMediaContainerService.Stub.asInterface(service); 290 mObbActionHandler.sendMessage(mObbActionHandler.obtainMessage(OBB_MCS_BOUND, imcs)); 291 } 292 293 public void onServiceDisconnected(ComponentName name) { 294 if (DEBUG_OBB) 295 Slog.i(TAG, "onServiceDisconnected"); 296 } 297 }; 298 299 // Used in the ObbActionHandler 300 private IMediaContainerService mContainerService = null; 301 302 // Handler messages 303 private static final int H_UNMOUNT_PM_UPDATE = 1; 304 private static final int H_UNMOUNT_PM_DONE = 2; 305 private static final int H_UNMOUNT_MS = 3; 306 private static final int RETRY_UNMOUNT_DELAY = 30; // in ms 307 private static final int MAX_UNMOUNT_RETRIES = 4; 308 309 class UnmountCallBack { 310 final String path; 311 final boolean force; 312 final boolean removeEncryption; 313 int retries; 314 315 UnmountCallBack(String path, boolean force, boolean removeEncryption) { 316 retries = 0; 317 this.path = path; 318 this.force = force; 319 this.removeEncryption = removeEncryption; 320 } 321 322 void handleFinished() { 323 if (DEBUG_UNMOUNT) Slog.i(TAG, "Unmounting " + path); 324 doUnmountVolume(path, true, removeEncryption); 325 } 326 } 327 328 class UmsEnableCallBack extends UnmountCallBack { 329 final String method; 330 331 UmsEnableCallBack(String path, String method, boolean force) { 332 super(path, force, false); 333 this.method = method; 334 } 335 336 @Override 337 void handleFinished() { 338 super.handleFinished(); 339 doShareUnshareVolume(path, method, true); 340 } 341 } 342 343 class ShutdownCallBack extends UnmountCallBack { 344 IMountShutdownObserver observer; 345 ShutdownCallBack(String path, IMountShutdownObserver observer) { 346 super(path, true, false); 347 this.observer = observer; 348 } 349 350 @Override 351 void handleFinished() { 352 int ret = doUnmountVolume(path, true, removeEncryption); 353 if (observer != null) { 354 try { 355 observer.onShutDownComplete(ret); 356 } catch (RemoteException e) { 357 Slog.w(TAG, "RemoteException when shutting down"); 358 } 359 } 360 } 361 } 362 363 class MountServiceHandler extends Handler { 364 ArrayList<UnmountCallBack> mForceUnmounts = new ArrayList<UnmountCallBack>(); 365 boolean mUpdatingStatus = false; 366 367 MountServiceHandler(Looper l) { 368 super(l); 369 } 370 371 @Override 372 public void handleMessage(Message msg) { 373 switch (msg.what) { 374 case H_UNMOUNT_PM_UPDATE: { 375 if (DEBUG_UNMOUNT) Slog.i(TAG, "H_UNMOUNT_PM_UPDATE"); 376 UnmountCallBack ucb = (UnmountCallBack) msg.obj; 377 mForceUnmounts.add(ucb); 378 if (DEBUG_UNMOUNT) Slog.i(TAG, " registered = " + mUpdatingStatus); 379 // Register only if needed. 380 if (!mUpdatingStatus) { 381 if (DEBUG_UNMOUNT) Slog.i(TAG, "Updating external media status on PackageManager"); 382 mUpdatingStatus = true; 383 mPms.updateExternalMediaStatus(false, true); 384 } 385 break; 386 } 387 case H_UNMOUNT_PM_DONE: { 388 if (DEBUG_UNMOUNT) Slog.i(TAG, "H_UNMOUNT_PM_DONE"); 389 if (DEBUG_UNMOUNT) Slog.i(TAG, "Updated status. Processing requests"); 390 mUpdatingStatus = false; 391 int size = mForceUnmounts.size(); 392 int sizeArr[] = new int[size]; 393 int sizeArrN = 0; 394 // Kill processes holding references first 395 ActivityManagerService ams = (ActivityManagerService) 396 ServiceManager.getService("activity"); 397 for (int i = 0; i < size; i++) { 398 UnmountCallBack ucb = mForceUnmounts.get(i); 399 String path = ucb.path; 400 boolean done = false; 401 if (!ucb.force) { 402 done = true; 403 } else { 404 int pids[] = getStorageUsers(path); 405 if (pids == null || pids.length == 0) { 406 done = true; 407 } else { 408 // Eliminate system process here? 409 ams.killPids(pids, "unmount media", true); 410 // Confirm if file references have been freed. 411 pids = getStorageUsers(path); 412 if (pids == null || pids.length == 0) { 413 done = true; 414 } 415 } 416 } 417 if (!done && (ucb.retries < MAX_UNMOUNT_RETRIES)) { 418 // Retry again 419 Slog.i(TAG, "Retrying to kill storage users again"); 420 mHandler.sendMessageDelayed( 421 mHandler.obtainMessage(H_UNMOUNT_PM_DONE, 422 ucb.retries++), 423 RETRY_UNMOUNT_DELAY); 424 } else { 425 if (ucb.retries >= MAX_UNMOUNT_RETRIES) { 426 Slog.i(TAG, "Failed to unmount media inspite of " + 427 MAX_UNMOUNT_RETRIES + " retries. Forcibly killing processes now"); 428 } 429 sizeArr[sizeArrN++] = i; 430 mHandler.sendMessage(mHandler.obtainMessage(H_UNMOUNT_MS, 431 ucb)); 432 } 433 } 434 // Remove already processed elements from list. 435 for (int i = (sizeArrN-1); i >= 0; i--) { 436 mForceUnmounts.remove(sizeArr[i]); 437 } 438 break; 439 } 440 case H_UNMOUNT_MS : { 441 if (DEBUG_UNMOUNT) Slog.i(TAG, "H_UNMOUNT_MS"); 442 UnmountCallBack ucb = (UnmountCallBack) msg.obj; 443 ucb.handleFinished(); 444 break; 445 } 446 } 447 } 448 }; 449 final private HandlerThread mHandlerThread; 450 final private Handler mHandler; 451 452 void waitForAsecScan() { 453 waitForLatch(mAsecsScanned); 454 } 455 456 private void waitForReady() { 457 waitForLatch(mConnectedSignal); 458 } 459 460 private void waitForLatch(CountDownLatch latch) { 461 if (latch == null) { 462 return; 463 } 464 465 for (;;) { 466 try { 467 if (latch.await(5000, TimeUnit.MILLISECONDS)) { 468 return; 469 } else { 470 Slog.w(TAG, "Thread " + Thread.currentThread().getName() 471 + " still waiting for MountService ready..."); 472 } 473 } catch (InterruptedException e) { 474 Slog.w(TAG, "Interrupt while waiting for MountService to be ready."); 475 } 476 } 477 } 478 479 private final BroadcastReceiver mBroadcastReceiver = new BroadcastReceiver() { 480 @Override 481 public void onReceive(Context context, Intent intent) { 482 String action = intent.getAction(); 483 484 if (action.equals(Intent.ACTION_BOOT_COMPLETED)) { 485 mBooted = true; 486 487 /* 488 * In the simulator, we need to broadcast a volume mounted event 489 * to make the media scanner run. 490 */ 491 if ("simulator".equals(SystemProperties.get("ro.product.device"))) { 492 notifyVolumeStateChange(null, "/sdcard", VolumeState.NoMedia, 493 VolumeState.Mounted); 494 return; 495 } 496 new Thread() { 497 @Override 498 public void run() { 499 try { 500 // it is not safe to call vold with mVolumeStates locked 501 // so we make a copy of the paths and states and process them 502 // outside the lock 503 String[] paths; 504 String[] states; 505 int count; 506 synchronized (mVolumeStates) { 507 Set<String> keys = mVolumeStates.keySet(); 508 count = keys.size(); 509 paths = keys.toArray(new String[count]); 510 states = new String[count]; 511 for (int i = 0; i < count; i++) { 512 states[i] = mVolumeStates.get(paths[i]); 513 } 514 } 515 516 for (int i = 0; i < count; i++) { 517 String path = paths[i]; 518 String state = states[i]; 519 520 if (state.equals(Environment.MEDIA_UNMOUNTED)) { 521 int rc = doMountVolume(path); 522 if (rc != StorageResultCode.OperationSucceeded) { 523 Slog.e(TAG, String.format("Boot-time mount failed (%d)", 524 rc)); 525 } 526 } else if (state.equals(Environment.MEDIA_SHARED)) { 527 /* 528 * Bootstrap UMS enabled state since vold indicates 529 * the volume is shared (runtime restart while ums enabled) 530 */ 531 notifyVolumeStateChange(null, path, VolumeState.NoMedia, 532 VolumeState.Shared); 533 } 534 } 535 536 /* notify external storage has mounted to trigger media scanner */ 537 if (mEmulateExternalStorage) { 538 notifyVolumeStateChange(null, 539 Environment.getExternalStorageDirectory().getPath(), 540 VolumeState.NoMedia, VolumeState.Mounted); 541 } 542 543 /* 544 * If UMS was connected on boot, send the connected event 545 * now that we're up. 546 */ 547 if (mSendUmsConnectedOnBoot) { 548 sendUmsIntent(true); 549 mSendUmsConnectedOnBoot = false; 550 } 551 } catch (Exception ex) { 552 Slog.e(TAG, "Boot-time mount exception", ex); 553 } 554 } 555 }.start(); 556 } else if (action.equals(UsbManager.ACTION_USB_STATE)) { 557 boolean available = (intent.getBooleanExtra(UsbManager.USB_CONNECTED, false) && 558 intent.getBooleanExtra(UsbManager.USB_FUNCTION_MASS_STORAGE, false)); 559 notifyShareAvailabilityChange(available); 560 } 561 } 562 }; 563 private final class MountServiceBinderListener implements IBinder.DeathRecipient { 564 final IMountServiceListener mListener; 565 566 MountServiceBinderListener(IMountServiceListener listener) { 567 mListener = listener; 568 569 } 570 571 public void binderDied() { 572 if (LOCAL_LOGD) Slog.d(TAG, "An IMountServiceListener has died!"); 573 synchronized (mListeners) { 574 mListeners.remove(this); 575 mListener.asBinder().unlinkToDeath(this, 0); 576 } 577 } 578 } 579 580 private void doShareUnshareVolume(String path, String method, boolean enable) { 581 // TODO: Add support for multiple share methods 582 if (!method.equals("ums")) { 583 throw new IllegalArgumentException(String.format("Method %s not supported", method)); 584 } 585 586 try { 587 mConnector.execute("volume", enable ? "share" : "unshare", path, method); 588 } catch (NativeDaemonConnectorException e) { 589 Slog.e(TAG, "Failed to share/unshare", e); 590 } 591 } 592 593 private void updatePublicVolumeState(String path, String state) { 594 String oldState; 595 synchronized(mVolumeStates) { 596 oldState = mVolumeStates.put(path, state); 597 } 598 if (state.equals(oldState)) { 599 Slog.w(TAG, String.format("Duplicate state transition (%s -> %s) for %s", 600 state, state, path)); 601 return; 602 } 603 604 Slog.d(TAG, "volume state changed for " + path + " (" + oldState + " -> " + state + ")"); 605 606 if (path.equals(mExternalStoragePath)) { 607 // Update state on PackageManager, but only of real events 608 if (!mEmulateExternalStorage) { 609 if (Environment.MEDIA_UNMOUNTED.equals(state)) { 610 mPms.updateExternalMediaStatus(false, false); 611 612 /* 613 * Some OBBs might have been unmounted when this volume was 614 * unmounted, so send a message to the handler to let it know to 615 * remove those from the list of mounted OBBS. 616 */ 617 mObbActionHandler.sendMessage(mObbActionHandler.obtainMessage( 618 OBB_FLUSH_MOUNT_STATE, path)); 619 } else if (Environment.MEDIA_MOUNTED.equals(state)) { 620 mPms.updateExternalMediaStatus(true, false); 621 } 622 } 623 } 624 synchronized (mListeners) { 625 for (int i = mListeners.size() -1; i >= 0; i--) { 626 MountServiceBinderListener bl = mListeners.get(i); 627 try { 628 bl.mListener.onStorageStateChanged(path, oldState, state); 629 } catch (RemoteException rex) { 630 Slog.e(TAG, "Listener dead"); 631 mListeners.remove(i); 632 } catch (Exception ex) { 633 Slog.e(TAG, "Listener failed", ex); 634 } 635 } 636 } 637 } 638 639 /** 640 * 641 * Callback from NativeDaemonConnector 642 */ 643 public void onDaemonConnected() { 644 /* 645 * Since we'll be calling back into the NativeDaemonConnector, 646 * we need to do our work in a new thread. 647 */ 648 new Thread("MountService#onDaemonConnected") { 649 @Override 650 public void run() { 651 /** 652 * Determine media state and UMS detection status 653 */ 654 try { 655 final String[] vols = NativeDaemonEvent.filterMessageList( 656 mConnector.executeForList("volume", "list"), 657 VoldResponseCode.VolumeListResult); 658 for (String volstr : vols) { 659 String[] tok = volstr.split(" "); 660 // FMT: <label> <mountpoint> <state> 661 String path = tok[1]; 662 String state = Environment.MEDIA_REMOVED; 663 664 int st = Integer.parseInt(tok[2]); 665 if (st == VolumeState.NoMedia) { 666 state = Environment.MEDIA_REMOVED; 667 } else if (st == VolumeState.Idle) { 668 state = Environment.MEDIA_UNMOUNTED; 669 } else if (st == VolumeState.Mounted) { 670 state = Environment.MEDIA_MOUNTED; 671 Slog.i(TAG, "Media already mounted on daemon connection"); 672 } else if (st == VolumeState.Shared) { 673 state = Environment.MEDIA_SHARED; 674 Slog.i(TAG, "Media shared on daemon connection"); 675 } else { 676 throw new Exception(String.format("Unexpected state %d", st)); 677 } 678 679 if (state != null) { 680 if (DEBUG_EVENTS) Slog.i(TAG, "Updating valid state " + state); 681 updatePublicVolumeState(path, state); 682 } 683 } 684 } catch (Exception e) { 685 Slog.e(TAG, "Error processing initial volume state", e); 686 updatePublicVolumeState(mExternalStoragePath, Environment.MEDIA_REMOVED); 687 } 688 689 /* 690 * Now that we've done our initialization, release 691 * the hounds! 692 */ 693 mConnectedSignal.countDown(); 694 mConnectedSignal = null; 695 696 // Let package manager load internal ASECs. 697 mPms.scanAvailableAsecs(); 698 699 // Notify people waiting for ASECs to be scanned that it's done. 700 mAsecsScanned.countDown(); 701 mAsecsScanned = null; 702 } 703 }.start(); 704 } 705 706 /** 707 * Callback from NativeDaemonConnector 708 */ 709 public boolean onEvent(int code, String raw, String[] cooked) { 710 if (DEBUG_EVENTS) { 711 StringBuilder builder = new StringBuilder(); 712 builder.append("onEvent::"); 713 builder.append(" raw= " + raw); 714 if (cooked != null) { 715 builder.append(" cooked = " ); 716 for (String str : cooked) { 717 builder.append(" " + str); 718 } 719 } 720 Slog.i(TAG, builder.toString()); 721 } 722 if (code == VoldResponseCode.VolumeStateChange) { 723 /* 724 * One of the volumes we're managing has changed state. 725 * Format: "NNN Volume <label> <path> state changed 726 * from <old_#> (<old_str>) to <new_#> (<new_str>)" 727 */ 728 notifyVolumeStateChange( 729 cooked[2], cooked[3], Integer.parseInt(cooked[7]), 730 Integer.parseInt(cooked[10])); 731 } else if ((code == VoldResponseCode.VolumeDiskInserted) || 732 (code == VoldResponseCode.VolumeDiskRemoved) || 733 (code == VoldResponseCode.VolumeBadRemoval)) { 734 // FMT: NNN Volume <label> <mountpoint> disk inserted (<major>:<minor>) 735 // FMT: NNN Volume <label> <mountpoint> disk removed (<major>:<minor>) 736 // FMT: NNN Volume <label> <mountpoint> bad removal (<major>:<minor>) 737 String action = null; 738 final String label = cooked[2]; 739 final String path = cooked[3]; 740 int major = -1; 741 int minor = -1; 742 743 try { 744 String devComp = cooked[6].substring(1, cooked[6].length() -1); 745 String[] devTok = devComp.split(":"); 746 major = Integer.parseInt(devTok[0]); 747 minor = Integer.parseInt(devTok[1]); 748 } catch (Exception ex) { 749 Slog.e(TAG, "Failed to parse major/minor", ex); 750 } 751 752 if (code == VoldResponseCode.VolumeDiskInserted) { 753 new Thread() { 754 @Override 755 public void run() { 756 try { 757 int rc; 758 if ((rc = doMountVolume(path)) != StorageResultCode.OperationSucceeded) { 759 Slog.w(TAG, String.format("Insertion mount failed (%d)", rc)); 760 } 761 } catch (Exception ex) { 762 Slog.w(TAG, "Failed to mount media on insertion", ex); 763 } 764 } 765 }.start(); 766 } else if (code == VoldResponseCode.VolumeDiskRemoved) { 767 /* 768 * This event gets trumped if we're already in BAD_REMOVAL state 769 */ 770 if (getVolumeState(path).equals(Environment.MEDIA_BAD_REMOVAL)) { 771 return true; 772 } 773 /* Send the media unmounted event first */ 774 if (DEBUG_EVENTS) Slog.i(TAG, "Sending unmounted event first"); 775 updatePublicVolumeState(path, Environment.MEDIA_UNMOUNTED); 776 sendStorageIntent(Environment.MEDIA_UNMOUNTED, path); 777 778 if (DEBUG_EVENTS) Slog.i(TAG, "Sending media removed"); 779 updatePublicVolumeState(path, Environment.MEDIA_REMOVED); 780 action = Intent.ACTION_MEDIA_REMOVED; 781 } else if (code == VoldResponseCode.VolumeBadRemoval) { 782 if (DEBUG_EVENTS) Slog.i(TAG, "Sending unmounted event first"); 783 /* Send the media unmounted event first */ 784 updatePublicVolumeState(path, Environment.MEDIA_UNMOUNTED); 785 action = Intent.ACTION_MEDIA_UNMOUNTED; 786 787 if (DEBUG_EVENTS) Slog.i(TAG, "Sending media bad removal"); 788 updatePublicVolumeState(path, Environment.MEDIA_BAD_REMOVAL); 789 action = Intent.ACTION_MEDIA_BAD_REMOVAL; 790 } else { 791 Slog.e(TAG, String.format("Unknown code {%d}", code)); 792 } 793 794 if (action != null) { 795 sendStorageIntent(action, path); 796 } 797 } else { 798 return false; 799 } 800 801 return true; 802 } 803 804 private void notifyVolumeStateChange(String label, String path, int oldState, int newState) { 805 String vs = getVolumeState(path); 806 if (DEBUG_EVENTS) Slog.i(TAG, "notifyVolumeStateChanged::" + vs); 807 808 String action = null; 809 810 if (oldState == VolumeState.Shared && newState != oldState) { 811 if (LOCAL_LOGD) Slog.d(TAG, "Sending ACTION_MEDIA_UNSHARED intent"); 812 sendStorageIntent(Intent.ACTION_MEDIA_UNSHARED, path); 813 } 814 815 if (newState == VolumeState.Init) { 816 } else if (newState == VolumeState.NoMedia) { 817 // NoMedia is handled via Disk Remove events 818 } else if (newState == VolumeState.Idle) { 819 /* 820 * Don't notify if we're in BAD_REMOVAL, NOFS, UNMOUNTABLE, or 821 * if we're in the process of enabling UMS 822 */ 823 if (!vs.equals( 824 Environment.MEDIA_BAD_REMOVAL) && !vs.equals( 825 Environment.MEDIA_NOFS) && !vs.equals( 826 Environment.MEDIA_UNMOUNTABLE) && !getUmsEnabling()) { 827 if (DEBUG_EVENTS) Slog.i(TAG, "updating volume state for media bad removal nofs and unmountable"); 828 updatePublicVolumeState(path, Environment.MEDIA_UNMOUNTED); 829 action = Intent.ACTION_MEDIA_UNMOUNTED; 830 } 831 } else if (newState == VolumeState.Pending) { 832 } else if (newState == VolumeState.Checking) { 833 if (DEBUG_EVENTS) Slog.i(TAG, "updating volume state checking"); 834 updatePublicVolumeState(path, Environment.MEDIA_CHECKING); 835 action = Intent.ACTION_MEDIA_CHECKING; 836 } else if (newState == VolumeState.Mounted) { 837 if (DEBUG_EVENTS) Slog.i(TAG, "updating volume state mounted"); 838 updatePublicVolumeState(path, Environment.MEDIA_MOUNTED); 839 action = Intent.ACTION_MEDIA_MOUNTED; 840 } else if (newState == VolumeState.Unmounting) { 841 action = Intent.ACTION_MEDIA_EJECT; 842 } else if (newState == VolumeState.Formatting) { 843 } else if (newState == VolumeState.Shared) { 844 if (DEBUG_EVENTS) Slog.i(TAG, "Updating volume state media mounted"); 845 /* Send the media unmounted event first */ 846 updatePublicVolumeState(path, Environment.MEDIA_UNMOUNTED); 847 sendStorageIntent(Intent.ACTION_MEDIA_UNMOUNTED, path); 848 849 if (DEBUG_EVENTS) Slog.i(TAG, "Updating media shared"); 850 updatePublicVolumeState(path, Environment.MEDIA_SHARED); 851 action = Intent.ACTION_MEDIA_SHARED; 852 if (LOCAL_LOGD) Slog.d(TAG, "Sending ACTION_MEDIA_SHARED intent"); 853 } else if (newState == VolumeState.SharedMnt) { 854 Slog.e(TAG, "Live shared mounts not supported yet!"); 855 return; 856 } else { 857 Slog.e(TAG, "Unhandled VolumeState {" + newState + "}"); 858 } 859 860 if (action != null) { 861 sendStorageIntent(action, path); 862 } 863 } 864 865 private int doMountVolume(String path) { 866 int rc = StorageResultCode.OperationSucceeded; 867 868 if (DEBUG_EVENTS) Slog.i(TAG, "doMountVolume: Mouting " + path); 869 try { 870 mConnector.execute("volume", "mount", path); 871 } catch (NativeDaemonConnectorException e) { 872 /* 873 * Mount failed for some reason 874 */ 875 String action = null; 876 int code = e.getCode(); 877 if (code == VoldResponseCode.OpFailedNoMedia) { 878 /* 879 * Attempt to mount but no media inserted 880 */ 881 rc = StorageResultCode.OperationFailedNoMedia; 882 } else if (code == VoldResponseCode.OpFailedMediaBlank) { 883 if (DEBUG_EVENTS) Slog.i(TAG, " updating volume state :: media nofs"); 884 /* 885 * Media is blank or does not contain a supported filesystem 886 */ 887 updatePublicVolumeState(path, Environment.MEDIA_NOFS); 888 action = Intent.ACTION_MEDIA_NOFS; 889 rc = StorageResultCode.OperationFailedMediaBlank; 890 } else if (code == VoldResponseCode.OpFailedMediaCorrupt) { 891 if (DEBUG_EVENTS) Slog.i(TAG, "updating volume state media corrupt"); 892 /* 893 * Volume consistency check failed 894 */ 895 updatePublicVolumeState(path, Environment.MEDIA_UNMOUNTABLE); 896 action = Intent.ACTION_MEDIA_UNMOUNTABLE; 897 rc = StorageResultCode.OperationFailedMediaCorrupt; 898 } else { 899 rc = StorageResultCode.OperationFailedInternalError; 900 } 901 902 /* 903 * Send broadcast intent (if required for the failure) 904 */ 905 if (action != null) { 906 sendStorageIntent(action, path); 907 } 908 } 909 910 return rc; 911 } 912 913 /* 914 * If force is not set, we do not unmount if there are 915 * processes holding references to the volume about to be unmounted. 916 * If force is set, all the processes holding references need to be 917 * killed via the ActivityManager before actually unmounting the volume. 918 * This might even take a while and might be retried after timed delays 919 * to make sure we dont end up in an instable state and kill some core 920 * processes. 921 * If removeEncryption is set, force is implied, and the system will remove any encryption 922 * mapping set on the volume when unmounting. 923 */ 924 private int doUnmountVolume(String path, boolean force, boolean removeEncryption) { 925 if (!getVolumeState(path).equals(Environment.MEDIA_MOUNTED)) { 926 return VoldResponseCode.OpFailedVolNotMounted; 927 } 928 929 /* 930 * Force a GC to make sure AssetManagers in other threads of the 931 * system_server are cleaned up. We have to do this since AssetManager 932 * instances are kept as a WeakReference and it's possible we have files 933 * open on the external storage. 934 */ 935 Runtime.getRuntime().gc(); 936 937 // Redundant probably. But no harm in updating state again. 938 mPms.updateExternalMediaStatus(false, false); 939 try { 940 final Command cmd = new Command("volume", "unmount", path); 941 if (removeEncryption) { 942 cmd.appendArg("force_and_revert"); 943 } else if (force) { 944 cmd.appendArg("force"); 945 } 946 mConnector.execute(cmd); 947 // We unmounted the volume. None of the asec containers are available now. 948 synchronized (mAsecMountSet) { 949 mAsecMountSet.clear(); 950 } 951 return StorageResultCode.OperationSucceeded; 952 } catch (NativeDaemonConnectorException e) { 953 // Don't worry about mismatch in PackageManager since the 954 // call back will handle the status changes any way. 955 int code = e.getCode(); 956 if (code == VoldResponseCode.OpFailedVolNotMounted) { 957 return StorageResultCode.OperationFailedStorageNotMounted; 958 } else if (code == VoldResponseCode.OpFailedStorageBusy) { 959 return StorageResultCode.OperationFailedStorageBusy; 960 } else { 961 return StorageResultCode.OperationFailedInternalError; 962 } 963 } 964 } 965 966 private int doFormatVolume(String path) { 967 try { 968 mConnector.execute("volume", "format", path); 969 return StorageResultCode.OperationSucceeded; 970 } catch (NativeDaemonConnectorException e) { 971 int code = e.getCode(); 972 if (code == VoldResponseCode.OpFailedNoMedia) { 973 return StorageResultCode.OperationFailedNoMedia; 974 } else if (code == VoldResponseCode.OpFailedMediaCorrupt) { 975 return StorageResultCode.OperationFailedMediaCorrupt; 976 } else { 977 return StorageResultCode.OperationFailedInternalError; 978 } 979 } 980 } 981 982 private boolean doGetVolumeShared(String path, String method) { 983 final NativeDaemonEvent event; 984 try { 985 event = mConnector.execute("volume", "shared", path, method); 986 } catch (NativeDaemonConnectorException ex) { 987 Slog.e(TAG, "Failed to read response to volume shared " + path + " " + method); 988 return false; 989 } 990 991 if (event.getCode() == VoldResponseCode.ShareEnabledResult) { 992 return event.getMessage().endsWith("enabled"); 993 } else { 994 return false; 995 } 996 } 997 998 private void notifyShareAvailabilityChange(final boolean avail) { 999 synchronized (mListeners) { 1000 mUmsAvailable = avail; 1001 for (int i = mListeners.size() -1; i >= 0; i--) { 1002 MountServiceBinderListener bl = mListeners.get(i); 1003 try { 1004 bl.mListener.onUsbMassStorageConnectionChanged(avail); 1005 } catch (RemoteException rex) { 1006 Slog.e(TAG, "Listener dead"); 1007 mListeners.remove(i); 1008 } catch (Exception ex) { 1009 Slog.e(TAG, "Listener failed", ex); 1010 } 1011 } 1012 } 1013 1014 if (mBooted == true) { 1015 sendUmsIntent(avail); 1016 } else { 1017 mSendUmsConnectedOnBoot = avail; 1018 } 1019 1020 final String path = Environment.getExternalStorageDirectory().getPath(); 1021 if (avail == false && getVolumeState(path).equals(Environment.MEDIA_SHARED)) { 1022 /* 1023 * USB mass storage disconnected while enabled 1024 */ 1025 new Thread() { 1026 @Override 1027 public void run() { 1028 try { 1029 int rc; 1030 Slog.w(TAG, "Disabling UMS after cable disconnect"); 1031 doShareUnshareVolume(path, "ums", false); 1032 if ((rc = doMountVolume(path)) != StorageResultCode.OperationSucceeded) { 1033 Slog.e(TAG, String.format( 1034 "Failed to remount {%s} on UMS enabled-disconnect (%d)", 1035 path, rc)); 1036 } 1037 } catch (Exception ex) { 1038 Slog.w(TAG, "Failed to mount media on UMS enabled-disconnect", ex); 1039 } 1040 } 1041 }.start(); 1042 } 1043 } 1044 1045 private void sendStorageIntent(String action, String path) { 1046 Intent intent = new Intent(action, Uri.parse("file://" + path)); 1047 // add StorageVolume extra 1048 intent.putExtra(StorageVolume.EXTRA_STORAGE_VOLUME, mVolumeMap.get(path)); 1049 Slog.d(TAG, "sendStorageIntent " + intent); 1050 mContext.sendBroadcast(intent); 1051 } 1052 1053 private void sendUmsIntent(boolean c) { 1054 mContext.sendBroadcast( 1055 new Intent((c ? Intent.ACTION_UMS_CONNECTED : Intent.ACTION_UMS_DISCONNECTED))); 1056 } 1057 1058 private void validatePermission(String perm) { 1059 if (mContext.checkCallingOrSelfPermission(perm) != PackageManager.PERMISSION_GRANTED) { 1060 throw new SecurityException(String.format("Requires %s permission", perm)); 1061 } 1062 } 1063 1064 // Storage list XML tags 1065 private static final String TAG_STORAGE_LIST = "StorageList"; 1066 private static final String TAG_STORAGE = "storage"; 1067 1068 private void readStorageList() { 1069 Resources resources = mContext.getResources(); 1070 1071 int id = com.android.internal.R.xml.storage_list; 1072 XmlResourceParser parser = resources.getXml(id); 1073 AttributeSet attrs = Xml.asAttributeSet(parser); 1074 1075 try { 1076 XmlUtils.beginDocument(parser, TAG_STORAGE_LIST); 1077 while (true) { 1078 XmlUtils.nextElement(parser); 1079 1080 String element = parser.getName(); 1081 if (element == null) break; 1082 1083 if (TAG_STORAGE.equals(element)) { 1084 TypedArray a = resources.obtainAttributes(attrs, 1085 com.android.internal.R.styleable.Storage); 1086 1087 CharSequence path = a.getText( 1088 com.android.internal.R.styleable.Storage_mountPoint); 1089 int descriptionId = a.getResourceId( 1090 com.android.internal.R.styleable.Storage_storageDescription, -1); 1091 CharSequence description = a.getText( 1092 com.android.internal.R.styleable.Storage_storageDescription); 1093 boolean primary = a.getBoolean( 1094 com.android.internal.R.styleable.Storage_primary, false); 1095 boolean removable = a.getBoolean( 1096 com.android.internal.R.styleable.Storage_removable, false); 1097 boolean emulated = a.getBoolean( 1098 com.android.internal.R.styleable.Storage_emulated, false); 1099 int mtpReserve = a.getInt( 1100 com.android.internal.R.styleable.Storage_mtpReserve, 0); 1101 boolean allowMassStorage = a.getBoolean( 1102 com.android.internal.R.styleable.Storage_allowMassStorage, false); 1103 // resource parser does not support longs, so XML value is in megabytes 1104 long maxFileSize = a.getInt( 1105 com.android.internal.R.styleable.Storage_maxFileSize, 0) * 1024L * 1024L; 1106 1107 Slog.d(TAG, "got storage path: " + path + " description: " + description + 1108 " primary: " + primary + " removable: " + removable + 1109 " emulated: " + emulated + " mtpReserve: " + mtpReserve + 1110 " allowMassStorage: " + allowMassStorage + 1111 " maxFileSize: " + maxFileSize); 1112 if (path == null || description == null) { 1113 Slog.e(TAG, "path or description is null in readStorageList"); 1114 } else { 1115 String pathString = path.toString(); 1116 StorageVolume volume = new StorageVolume(pathString, 1117 descriptionId, removable, emulated, 1118 mtpReserve, allowMassStorage, maxFileSize); 1119 if (primary) { 1120 if (mPrimaryVolume == null) { 1121 mPrimaryVolume = volume; 1122 } else { 1123 Slog.e(TAG, "multiple primary volumes in storage list"); 1124 } 1125 } 1126 if (mPrimaryVolume == volume) { 1127 // primay volume must be first 1128 mVolumes.add(0, volume); 1129 } else { 1130 mVolumes.add(volume); 1131 } 1132 mVolumeMap.put(pathString, volume); 1133 } 1134 a.recycle(); 1135 } 1136 } 1137 } catch (XmlPullParserException e) { 1138 throw new RuntimeException(e); 1139 } catch (IOException e) { 1140 throw new RuntimeException(e); 1141 } finally { 1142 // compute storage ID for each volume 1143 int length = mVolumes.size(); 1144 for (int i = 0; i < length; i++) { 1145 mVolumes.get(i).setStorageId(i); 1146 } 1147 parser.close(); 1148 } 1149 } 1150 1151 /** 1152 * Constructs a new MountService instance 1153 * 1154 * @param context Binder context for this service 1155 */ 1156 public MountService(Context context) { 1157 mContext = context; 1158 readStorageList(); 1159 1160 if (mPrimaryVolume != null) { 1161 mExternalStoragePath = mPrimaryVolume.getPath(); 1162 mEmulateExternalStorage = mPrimaryVolume.isEmulated(); 1163 if (mEmulateExternalStorage) { 1164 Slog.d(TAG, "using emulated external storage"); 1165 mVolumeStates.put(mExternalStoragePath, Environment.MEDIA_MOUNTED); 1166 } 1167 } 1168 1169 // XXX: This will go away soon in favor of IMountServiceObserver 1170 mPms = (PackageManagerService) ServiceManager.getService("package"); 1171 1172 IntentFilter filter = new IntentFilter(); 1173 filter.addAction(Intent.ACTION_BOOT_COMPLETED); 1174 // don't bother monitoring USB if mass storage is not supported on our primary volume 1175 if (mPrimaryVolume != null && mPrimaryVolume.allowMassStorage()) { 1176 filter.addAction(UsbManager.ACTION_USB_STATE); 1177 } 1178 mContext.registerReceiver(mBroadcastReceiver, filter, null, null); 1179 1180 mHandlerThread = new HandlerThread("MountService"); 1181 mHandlerThread.start(); 1182 mHandler = new MountServiceHandler(mHandlerThread.getLooper()); 1183 1184 // Add OBB Action Handler to MountService thread. 1185 mObbActionHandler = new ObbActionHandler(mHandlerThread.getLooper()); 1186 1187 /* 1188 * Create the connection to vold with a maximum queue of twice the 1189 * amount of containers we'd ever expect to have. This keeps an 1190 * "asec list" from blocking a thread repeatedly. 1191 */ 1192 mConnector = new NativeDaemonConnector(this, "vold", MAX_CONTAINERS * 2, VOLD_TAG, 25); 1193 1194 Thread thread = new Thread(mConnector, VOLD_TAG); 1195 thread.start(); 1196 1197 // Add ourself to the Watchdog monitors if enabled. 1198 if (WATCHDOG_ENABLE) { 1199 Watchdog.getInstance().addMonitor(this); 1200 } 1201 } 1202 1203 /** 1204 * Exposed API calls below here 1205 */ 1206 1207 public void registerListener(IMountServiceListener listener) { 1208 synchronized (mListeners) { 1209 MountServiceBinderListener bl = new MountServiceBinderListener(listener); 1210 try { 1211 listener.asBinder().linkToDeath(bl, 0); 1212 mListeners.add(bl); 1213 } catch (RemoteException rex) { 1214 Slog.e(TAG, "Failed to link to listener death"); 1215 } 1216 } 1217 } 1218 1219 public void unregisterListener(IMountServiceListener listener) { 1220 synchronized (mListeners) { 1221 for(MountServiceBinderListener bl : mListeners) { 1222 if (bl.mListener == listener) { 1223 mListeners.remove(mListeners.indexOf(bl)); 1224 return; 1225 } 1226 } 1227 } 1228 } 1229 1230 public void shutdown(final IMountShutdownObserver observer) { 1231 validatePermission(android.Manifest.permission.SHUTDOWN); 1232 1233 Slog.i(TAG, "Shutting down"); 1234 synchronized (mVolumeStates) { 1235 for (String path : mVolumeStates.keySet()) { 1236 String state = mVolumeStates.get(path); 1237 1238 if (state.equals(Environment.MEDIA_SHARED)) { 1239 /* 1240 * If the media is currently shared, unshare it. 1241 * XXX: This is still dangerous!. We should not 1242 * be rebooting at *all* if UMS is enabled, since 1243 * the UMS host could have dirty FAT cache entries 1244 * yet to flush. 1245 */ 1246 setUsbMassStorageEnabled(false); 1247 } else if (state.equals(Environment.MEDIA_CHECKING)) { 1248 /* 1249 * If the media is being checked, then we need to wait for 1250 * it to complete before being able to proceed. 1251 */ 1252 // XXX: @hackbod - Should we disable the ANR timer here? 1253 int retries = 30; 1254 while (state.equals(Environment.MEDIA_CHECKING) && (retries-- >=0)) { 1255 try { 1256 Thread.sleep(1000); 1257 } catch (InterruptedException iex) { 1258 Slog.e(TAG, "Interrupted while waiting for media", iex); 1259 break; 1260 } 1261 state = Environment.getExternalStorageState(); 1262 } 1263 if (retries == 0) { 1264 Slog.e(TAG, "Timed out waiting for media to check"); 1265 } 1266 } 1267 1268 if (state.equals(Environment.MEDIA_MOUNTED)) { 1269 // Post a unmount message. 1270 ShutdownCallBack ucb = new ShutdownCallBack(path, observer); 1271 mHandler.sendMessage(mHandler.obtainMessage(H_UNMOUNT_PM_UPDATE, ucb)); 1272 } else if (observer != null) { 1273 /* 1274 * Observer is waiting for onShutDownComplete when we are done. 1275 * Since nothing will be done send notification directly so shutdown 1276 * sequence can continue. 1277 */ 1278 try { 1279 observer.onShutDownComplete(StorageResultCode.OperationSucceeded); 1280 } catch (RemoteException e) { 1281 Slog.w(TAG, "RemoteException when shutting down"); 1282 } 1283 } 1284 } 1285 } 1286 } 1287 1288 private boolean getUmsEnabling() { 1289 synchronized (mListeners) { 1290 return mUmsEnabling; 1291 } 1292 } 1293 1294 private void setUmsEnabling(boolean enable) { 1295 synchronized (mListeners) { 1296 mUmsEnabling = enable; 1297 } 1298 } 1299 1300 public boolean isUsbMassStorageConnected() { 1301 waitForReady(); 1302 1303 if (getUmsEnabling()) { 1304 return true; 1305 } 1306 synchronized (mListeners) { 1307 return mUmsAvailable; 1308 } 1309 } 1310 1311 public void setUsbMassStorageEnabled(boolean enable) { 1312 waitForReady(); 1313 validatePermission(android.Manifest.permission.MOUNT_UNMOUNT_FILESYSTEMS); 1314 1315 // TODO: Add support for multiple share methods 1316 1317 /* 1318 * If the volume is mounted and we're enabling then unmount it 1319 */ 1320 String path = Environment.getExternalStorageDirectory().getPath(); 1321 String vs = getVolumeState(path); 1322 String method = "ums"; 1323 if (enable && vs.equals(Environment.MEDIA_MOUNTED)) { 1324 // Override for isUsbMassStorageEnabled() 1325 setUmsEnabling(enable); 1326 UmsEnableCallBack umscb = new UmsEnableCallBack(path, method, true); 1327 mHandler.sendMessage(mHandler.obtainMessage(H_UNMOUNT_PM_UPDATE, umscb)); 1328 // Clear override 1329 setUmsEnabling(false); 1330 } 1331 /* 1332 * If we disabled UMS then mount the volume 1333 */ 1334 if (!enable) { 1335 doShareUnshareVolume(path, method, enable); 1336 if (doMountVolume(path) != StorageResultCode.OperationSucceeded) { 1337 Slog.e(TAG, "Failed to remount " + path + 1338 " after disabling share method " + method); 1339 /* 1340 * Even though the mount failed, the unshare didn't so don't indicate an error. 1341 * The mountVolume() call will have set the storage state and sent the necessary 1342 * broadcasts. 1343 */ 1344 } 1345 } 1346 } 1347 1348 public boolean isUsbMassStorageEnabled() { 1349 waitForReady(); 1350 return doGetVolumeShared(Environment.getExternalStorageDirectory().getPath(), "ums"); 1351 } 1352 1353 /** 1354 * @return state of the volume at the specified mount point 1355 */ 1356 public String getVolumeState(String mountPoint) { 1357 synchronized (mVolumeStates) { 1358 String state = mVolumeStates.get(mountPoint); 1359 if (state == null) { 1360 Slog.w(TAG, "getVolumeState(" + mountPoint + "): Unknown volume"); 1361 if (SystemProperties.get("vold.encrypt_progress").length() != 0) { 1362 state = Environment.MEDIA_REMOVED; 1363 } else { 1364 throw new IllegalArgumentException(); 1365 } 1366 } 1367 1368 return state; 1369 } 1370 } 1371 1372 public boolean isExternalStorageEmulated() { 1373 return mEmulateExternalStorage; 1374 } 1375 1376 public int mountVolume(String path) { 1377 validatePermission(android.Manifest.permission.MOUNT_UNMOUNT_FILESYSTEMS); 1378 1379 waitForReady(); 1380 return doMountVolume(path); 1381 } 1382 1383 public void unmountVolume(String path, boolean force, boolean removeEncryption) { 1384 validatePermission(android.Manifest.permission.MOUNT_UNMOUNT_FILESYSTEMS); 1385 waitForReady(); 1386 1387 String volState = getVolumeState(path); 1388 if (DEBUG_UNMOUNT) { 1389 Slog.i(TAG, "Unmounting " + path 1390 + " force = " + force 1391 + " removeEncryption = " + removeEncryption); 1392 } 1393 if (Environment.MEDIA_UNMOUNTED.equals(volState) || 1394 Environment.MEDIA_REMOVED.equals(volState) || 1395 Environment.MEDIA_SHARED.equals(volState) || 1396 Environment.MEDIA_UNMOUNTABLE.equals(volState)) { 1397 // Media already unmounted or cannot be unmounted. 1398 // TODO return valid return code when adding observer call back. 1399 return; 1400 } 1401 UnmountCallBack ucb = new UnmountCallBack(path, force, removeEncryption); 1402 mHandler.sendMessage(mHandler.obtainMessage(H_UNMOUNT_PM_UPDATE, ucb)); 1403 } 1404 1405 public int formatVolume(String path) { 1406 validatePermission(android.Manifest.permission.MOUNT_FORMAT_FILESYSTEMS); 1407 waitForReady(); 1408 1409 return doFormatVolume(path); 1410 } 1411 1412 public int[] getStorageUsers(String path) { 1413 validatePermission(android.Manifest.permission.MOUNT_UNMOUNT_FILESYSTEMS); 1414 waitForReady(); 1415 try { 1416 final String[] r = NativeDaemonEvent.filterMessageList( 1417 mConnector.executeForList("storage", "users", path), 1418 VoldResponseCode.StorageUsersListResult); 1419 1420 // FMT: <pid> <process name> 1421 int[] data = new int[r.length]; 1422 for (int i = 0; i < r.length; i++) { 1423 String[] tok = r[i].split(" "); 1424 try { 1425 data[i] = Integer.parseInt(tok[0]); 1426 } catch (NumberFormatException nfe) { 1427 Slog.e(TAG, String.format("Error parsing pid %s", tok[0])); 1428 return new int[0]; 1429 } 1430 } 1431 return data; 1432 } catch (NativeDaemonConnectorException e) { 1433 Slog.e(TAG, "Failed to retrieve storage users list", e); 1434 return new int[0]; 1435 } 1436 } 1437 1438 private void warnOnNotMounted() { 1439 if (!Environment.getExternalStorageState().equals(Environment.MEDIA_MOUNTED)) { 1440 Slog.w(TAG, "getSecureContainerList() called when storage not mounted"); 1441 } 1442 } 1443 1444 public String[] getSecureContainerList() { 1445 validatePermission(android.Manifest.permission.ASEC_ACCESS); 1446 waitForReady(); 1447 warnOnNotMounted(); 1448 1449 try { 1450 return NativeDaemonEvent.filterMessageList( 1451 mConnector.executeForList("asec", "list"), VoldResponseCode.AsecListResult); 1452 } catch (NativeDaemonConnectorException e) { 1453 return new String[0]; 1454 } 1455 } 1456 1457 public int createSecureContainer(String id, int sizeMb, String fstype, String key, 1458 int ownerUid, boolean external) { 1459 validatePermission(android.Manifest.permission.ASEC_CREATE); 1460 waitForReady(); 1461 warnOnNotMounted(); 1462 1463 int rc = StorageResultCode.OperationSucceeded; 1464 try { 1465 mConnector.execute("asec", "create", id, sizeMb, fstype, key, ownerUid, 1466 external ? "1" : "0"); 1467 } catch (NativeDaemonConnectorException e) { 1468 rc = StorageResultCode.OperationFailedInternalError; 1469 } 1470 1471 if (rc == StorageResultCode.OperationSucceeded) { 1472 synchronized (mAsecMountSet) { 1473 mAsecMountSet.add(id); 1474 } 1475 } 1476 return rc; 1477 } 1478 1479 public int finalizeSecureContainer(String id) { 1480 validatePermission(android.Manifest.permission.ASEC_CREATE); 1481 warnOnNotMounted(); 1482 1483 int rc = StorageResultCode.OperationSucceeded; 1484 try { 1485 mConnector.execute("asec", "finalize", id); 1486 /* 1487 * Finalization does a remount, so no need 1488 * to update mAsecMountSet 1489 */ 1490 } catch (NativeDaemonConnectorException e) { 1491 rc = StorageResultCode.OperationFailedInternalError; 1492 } 1493 return rc; 1494 } 1495 1496 public int fixPermissionsSecureContainer(String id, int gid, String filename) { 1497 validatePermission(android.Manifest.permission.ASEC_CREATE); 1498 warnOnNotMounted(); 1499 1500 int rc = StorageResultCode.OperationSucceeded; 1501 try { 1502 mConnector.execute("asec", "fixperms", id, gid, filename); 1503 /* 1504 * Fix permissions does a remount, so no need to update 1505 * mAsecMountSet 1506 */ 1507 } catch (NativeDaemonConnectorException e) { 1508 rc = StorageResultCode.OperationFailedInternalError; 1509 } 1510 return rc; 1511 } 1512 1513 public int destroySecureContainer(String id, boolean force) { 1514 validatePermission(android.Manifest.permission.ASEC_DESTROY); 1515 waitForReady(); 1516 warnOnNotMounted(); 1517 1518 /* 1519 * Force a GC to make sure AssetManagers in other threads of the 1520 * system_server are cleaned up. We have to do this since AssetManager 1521 * instances are kept as a WeakReference and it's possible we have files 1522 * open on the external storage. 1523 */ 1524 Runtime.getRuntime().gc(); 1525 1526 int rc = StorageResultCode.OperationSucceeded; 1527 try { 1528 final Command cmd = new Command("asec", "destroy", id); 1529 if (force) { 1530 cmd.appendArg("force"); 1531 } 1532 mConnector.execute(cmd); 1533 } catch (NativeDaemonConnectorException e) { 1534 int code = e.getCode(); 1535 if (code == VoldResponseCode.OpFailedStorageBusy) { 1536 rc = StorageResultCode.OperationFailedStorageBusy; 1537 } else { 1538 rc = StorageResultCode.OperationFailedInternalError; 1539 } 1540 } 1541 1542 if (rc == StorageResultCode.OperationSucceeded) { 1543 synchronized (mAsecMountSet) { 1544 if (mAsecMountSet.contains(id)) { 1545 mAsecMountSet.remove(id); 1546 } 1547 } 1548 } 1549 1550 return rc; 1551 } 1552 1553 public int mountSecureContainer(String id, String key, int ownerUid) { 1554 validatePermission(android.Manifest.permission.ASEC_MOUNT_UNMOUNT); 1555 waitForReady(); 1556 warnOnNotMounted(); 1557 1558 synchronized (mAsecMountSet) { 1559 if (mAsecMountSet.contains(id)) { 1560 return StorageResultCode.OperationFailedStorageMounted; 1561 } 1562 } 1563 1564 int rc = StorageResultCode.OperationSucceeded; 1565 try { 1566 mConnector.execute("asec", "mount", id, key, ownerUid); 1567 } catch (NativeDaemonConnectorException e) { 1568 int code = e.getCode(); 1569 if (code != VoldResponseCode.OpFailedStorageBusy) { 1570 rc = StorageResultCode.OperationFailedInternalError; 1571 } 1572 } 1573 1574 if (rc == StorageResultCode.OperationSucceeded) { 1575 synchronized (mAsecMountSet) { 1576 mAsecMountSet.add(id); 1577 } 1578 } 1579 return rc; 1580 } 1581 1582 public int unmountSecureContainer(String id, boolean force) { 1583 validatePermission(android.Manifest.permission.ASEC_MOUNT_UNMOUNT); 1584 waitForReady(); 1585 warnOnNotMounted(); 1586 1587 synchronized (mAsecMountSet) { 1588 if (!mAsecMountSet.contains(id)) { 1589 return StorageResultCode.OperationFailedStorageNotMounted; 1590 } 1591 } 1592 1593 /* 1594 * Force a GC to make sure AssetManagers in other threads of the 1595 * system_server are cleaned up. We have to do this since AssetManager 1596 * instances are kept as a WeakReference and it's possible we have files 1597 * open on the external storage. 1598 */ 1599 Runtime.getRuntime().gc(); 1600 1601 int rc = StorageResultCode.OperationSucceeded; 1602 try { 1603 final Command cmd = new Command("asec", "unmount", id); 1604 if (force) { 1605 cmd.appendArg("force"); 1606 } 1607 mConnector.execute(cmd); 1608 } catch (NativeDaemonConnectorException e) { 1609 int code = e.getCode(); 1610 if (code == VoldResponseCode.OpFailedStorageBusy) { 1611 rc = StorageResultCode.OperationFailedStorageBusy; 1612 } else { 1613 rc = StorageResultCode.OperationFailedInternalError; 1614 } 1615 } 1616 1617 if (rc == StorageResultCode.OperationSucceeded) { 1618 synchronized (mAsecMountSet) { 1619 mAsecMountSet.remove(id); 1620 } 1621 } 1622 return rc; 1623 } 1624 1625 public boolean isSecureContainerMounted(String id) { 1626 validatePermission(android.Manifest.permission.ASEC_ACCESS); 1627 waitForReady(); 1628 warnOnNotMounted(); 1629 1630 synchronized (mAsecMountSet) { 1631 return mAsecMountSet.contains(id); 1632 } 1633 } 1634 1635 public int renameSecureContainer(String oldId, String newId) { 1636 validatePermission(android.Manifest.permission.ASEC_RENAME); 1637 waitForReady(); 1638 warnOnNotMounted(); 1639 1640 synchronized (mAsecMountSet) { 1641 /* 1642 * Because a mounted container has active internal state which cannot be 1643 * changed while active, we must ensure both ids are not currently mounted. 1644 */ 1645 if (mAsecMountSet.contains(oldId) || mAsecMountSet.contains(newId)) { 1646 return StorageResultCode.OperationFailedStorageMounted; 1647 } 1648 } 1649 1650 int rc = StorageResultCode.OperationSucceeded; 1651 try { 1652 mConnector.execute("asec", "rename", oldId, newId); 1653 } catch (NativeDaemonConnectorException e) { 1654 rc = StorageResultCode.OperationFailedInternalError; 1655 } 1656 1657 return rc; 1658 } 1659 1660 public String getSecureContainerPath(String id) { 1661 validatePermission(android.Manifest.permission.ASEC_ACCESS); 1662 waitForReady(); 1663 warnOnNotMounted(); 1664 1665 final NativeDaemonEvent event; 1666 try { 1667 event = mConnector.execute("asec", "path", id); 1668 event.checkCode(VoldResponseCode.AsecPathResult); 1669 return event.getMessage(); 1670 } catch (NativeDaemonConnectorException e) { 1671 int code = e.getCode(); 1672 if (code == VoldResponseCode.OpFailedStorageNotFound) { 1673 Slog.i(TAG, String.format("Container '%s' not found", id)); 1674 return null; 1675 } else { 1676 throw new IllegalStateException(String.format("Unexpected response code %d", code)); 1677 } 1678 } 1679 } 1680 1681 public String getSecureContainerFilesystemPath(String id) { 1682 validatePermission(android.Manifest.permission.ASEC_ACCESS); 1683 waitForReady(); 1684 warnOnNotMounted(); 1685 1686 final NativeDaemonEvent event; 1687 try { 1688 event = mConnector.execute("asec", "fspath", id); 1689 event.checkCode(VoldResponseCode.AsecPathResult); 1690 return event.getMessage(); 1691 } catch (NativeDaemonConnectorException e) { 1692 int code = e.getCode(); 1693 if (code == VoldResponseCode.OpFailedStorageNotFound) { 1694 Slog.i(TAG, String.format("Container '%s' not found", id)); 1695 return null; 1696 } else { 1697 throw new IllegalStateException(String.format("Unexpected response code %d", code)); 1698 } 1699 } 1700 } 1701 1702 public void finishMediaUpdate() { 1703 mHandler.sendEmptyMessage(H_UNMOUNT_PM_DONE); 1704 } 1705 1706 private boolean isUidOwnerOfPackageOrSystem(String packageName, int callerUid) { 1707 if (callerUid == android.os.Process.SYSTEM_UID) { 1708 return true; 1709 } 1710 1711 if (packageName == null) { 1712 return false; 1713 } 1714 1715 final int packageUid = mPms.getPackageUid(packageName, UserId.getUserId(callerUid)); 1716 1717 if (DEBUG_OBB) { 1718 Slog.d(TAG, "packageName = " + packageName + ", packageUid = " + 1719 packageUid + ", callerUid = " + callerUid); 1720 } 1721 1722 return callerUid == packageUid; 1723 } 1724 1725 public String getMountedObbPath(String filename) { 1726 if (filename == null) { 1727 throw new IllegalArgumentException("filename cannot be null"); 1728 } 1729 1730 waitForReady(); 1731 warnOnNotMounted(); 1732 1733 final NativeDaemonEvent event; 1734 try { 1735 event = mConnector.execute("obb", "path", filename); 1736 event.checkCode(VoldResponseCode.AsecPathResult); 1737 return event.getMessage(); 1738 } catch (NativeDaemonConnectorException e) { 1739 int code = e.getCode(); 1740 if (code == VoldResponseCode.OpFailedStorageNotFound) { 1741 return null; 1742 } else { 1743 throw new IllegalStateException(String.format("Unexpected response code %d", code)); 1744 } 1745 } 1746 } 1747 1748 public boolean isObbMounted(String filename) { 1749 if (filename == null) { 1750 throw new IllegalArgumentException("filename cannot be null"); 1751 } 1752 1753 synchronized (mObbMounts) { 1754 return mObbPathToStateMap.containsKey(filename); 1755 } 1756 } 1757 1758 public void mountObb(String filename, String key, IObbActionListener token, int nonce) 1759 throws RemoteException { 1760 if (filename == null) { 1761 throw new IllegalArgumentException("filename cannot be null"); 1762 } 1763 1764 if (token == null) { 1765 throw new IllegalArgumentException("token cannot be null"); 1766 } 1767 1768 final int callerUid = Binder.getCallingUid(); 1769 final ObbState obbState = new ObbState(filename, callerUid, token, nonce); 1770 final ObbAction action = new MountObbAction(obbState, key); 1771 mObbActionHandler.sendMessage(mObbActionHandler.obtainMessage(OBB_RUN_ACTION, action)); 1772 1773 if (DEBUG_OBB) 1774 Slog.i(TAG, "Send to OBB handler: " + action.toString()); 1775 } 1776 1777 public void unmountObb(String filename, boolean force, IObbActionListener token, int nonce) 1778 throws RemoteException { 1779 if (filename == null) { 1780 throw new IllegalArgumentException("filename cannot be null"); 1781 } 1782 1783 final int callerUid = Binder.getCallingUid(); 1784 final ObbState obbState = new ObbState(filename, callerUid, token, nonce); 1785 final ObbAction action = new UnmountObbAction(obbState, force); 1786 mObbActionHandler.sendMessage(mObbActionHandler.obtainMessage(OBB_RUN_ACTION, action)); 1787 1788 if (DEBUG_OBB) 1789 Slog.i(TAG, "Send to OBB handler: " + action.toString()); 1790 } 1791 1792 @Override 1793 public int getEncryptionState() { 1794 mContext.enforceCallingOrSelfPermission(Manifest.permission.CRYPT_KEEPER, 1795 "no permission to access the crypt keeper"); 1796 1797 waitForReady(); 1798 1799 final NativeDaemonEvent event; 1800 try { 1801 event = mConnector.execute("cryptfs", "cryptocomplete"); 1802 return Integer.parseInt(event.getMessage()); 1803 } catch (NumberFormatException e) { 1804 // Bad result - unexpected. 1805 Slog.w(TAG, "Unable to parse result from cryptfs cryptocomplete"); 1806 return ENCRYPTION_STATE_ERROR_UNKNOWN; 1807 } catch (NativeDaemonConnectorException e) { 1808 // Something bad happened. 1809 Slog.w(TAG, "Error in communicating with cryptfs in validating"); 1810 return ENCRYPTION_STATE_ERROR_UNKNOWN; 1811 } 1812 } 1813 1814 @Override 1815 public int decryptStorage(String password) { 1816 if (TextUtils.isEmpty(password)) { 1817 throw new IllegalArgumentException("password cannot be empty"); 1818 } 1819 1820 mContext.enforceCallingOrSelfPermission(Manifest.permission.CRYPT_KEEPER, 1821 "no permission to access the crypt keeper"); 1822 1823 waitForReady(); 1824 1825 if (DEBUG_EVENTS) { 1826 Slog.i(TAG, "decrypting storage..."); 1827 } 1828 1829 final NativeDaemonEvent event; 1830 try { 1831 event = mConnector.execute("cryptfs", "checkpw", password); 1832 1833 final int code = Integer.parseInt(event.getMessage()); 1834 if (code == 0) { 1835 // Decrypt was successful. Post a delayed message before restarting in order 1836 // to let the UI to clear itself 1837 mHandler.postDelayed(new Runnable() { 1838 public void run() { 1839 try { 1840 mConnector.execute("cryptfs", "restart"); 1841 } catch (NativeDaemonConnectorException e) { 1842 Slog.e(TAG, "problem executing in background", e); 1843 } 1844 } 1845 }, 1000); // 1 second 1846 } 1847 1848 return code; 1849 } catch (NativeDaemonConnectorException e) { 1850 // Decryption failed 1851 return e.getCode(); 1852 } 1853 } 1854 1855 public int encryptStorage(String password) { 1856 if (TextUtils.isEmpty(password)) { 1857 throw new IllegalArgumentException("password cannot be empty"); 1858 } 1859 1860 mContext.enforceCallingOrSelfPermission(Manifest.permission.CRYPT_KEEPER, 1861 "no permission to access the crypt keeper"); 1862 1863 waitForReady(); 1864 1865 if (DEBUG_EVENTS) { 1866 Slog.i(TAG, "encrypting storage..."); 1867 } 1868 1869 try { 1870 mConnector.execute("cryptfs", "enablecrypto", "inplace", password); 1871 } catch (NativeDaemonConnectorException e) { 1872 // Encryption failed 1873 return e.getCode(); 1874 } 1875 1876 return 0; 1877 } 1878 1879 public int changeEncryptionPassword(String password) { 1880 if (TextUtils.isEmpty(password)) { 1881 throw new IllegalArgumentException("password cannot be empty"); 1882 } 1883 1884 mContext.enforceCallingOrSelfPermission(Manifest.permission.CRYPT_KEEPER, 1885 "no permission to access the crypt keeper"); 1886 1887 waitForReady(); 1888 1889 if (DEBUG_EVENTS) { 1890 Slog.i(TAG, "changing encryption password..."); 1891 } 1892 1893 final NativeDaemonEvent event; 1894 try { 1895 event = mConnector.execute("cryptfs", "changepw", password); 1896 return Integer.parseInt(event.getMessage()); 1897 } catch (NativeDaemonConnectorException e) { 1898 // Encryption failed 1899 return e.getCode(); 1900 } 1901 } 1902 1903 /** 1904 * Validate a user-supplied password string with cryptfs 1905 */ 1906 @Override 1907 public int verifyEncryptionPassword(String password) throws RemoteException { 1908 // Only the system process is permitted to validate passwords 1909 if (Binder.getCallingUid() != android.os.Process.SYSTEM_UID) { 1910 throw new SecurityException("no permission to access the crypt keeper"); 1911 } 1912 1913 mContext.enforceCallingOrSelfPermission(Manifest.permission.CRYPT_KEEPER, 1914 "no permission to access the crypt keeper"); 1915 1916 if (TextUtils.isEmpty(password)) { 1917 throw new IllegalArgumentException("password cannot be empty"); 1918 } 1919 1920 waitForReady(); 1921 1922 if (DEBUG_EVENTS) { 1923 Slog.i(TAG, "validating encryption password..."); 1924 } 1925 1926 final NativeDaemonEvent event; 1927 try { 1928 event = mConnector.execute("cryptfs", "verifypw", password); 1929 Slog.i(TAG, "cryptfs verifypw => " + event.getMessage()); 1930 return Integer.parseInt(event.getMessage()); 1931 } catch (NativeDaemonConnectorException e) { 1932 // Encryption failed 1933 return e.getCode(); 1934 } 1935 } 1936 1937 public Parcelable[] getVolumeList() { 1938 synchronized(mVolumes) { 1939 int size = mVolumes.size(); 1940 Parcelable[] result = new Parcelable[size]; 1941 for (int i = 0; i < size; i++) { 1942 result[i] = mVolumes.get(i); 1943 } 1944 return result; 1945 } 1946 } 1947 1948 private void addObbStateLocked(ObbState obbState) throws RemoteException { 1949 final IBinder binder = obbState.getBinder(); 1950 List<ObbState> obbStates = mObbMounts.get(binder); 1951 1952 if (obbStates == null) { 1953 obbStates = new ArrayList<ObbState>(); 1954 mObbMounts.put(binder, obbStates); 1955 } else { 1956 for (final ObbState o : obbStates) { 1957 if (o.filename.equals(obbState.filename)) { 1958 throw new IllegalStateException("Attempt to add ObbState twice. " 1959 + "This indicates an error in the MountService logic."); 1960 } 1961 } 1962 } 1963 1964 obbStates.add(obbState); 1965 try { 1966 obbState.link(); 1967 } catch (RemoteException e) { 1968 /* 1969 * The binder died before we could link it, so clean up our state 1970 * and return failure. 1971 */ 1972 obbStates.remove(obbState); 1973 if (obbStates.isEmpty()) { 1974 mObbMounts.remove(binder); 1975 } 1976 1977 // Rethrow the error so mountObb can get it 1978 throw e; 1979 } 1980 1981 mObbPathToStateMap.put(obbState.filename, obbState); 1982 } 1983 1984 private void removeObbStateLocked(ObbState obbState) { 1985 final IBinder binder = obbState.getBinder(); 1986 final List<ObbState> obbStates = mObbMounts.get(binder); 1987 if (obbStates != null) { 1988 if (obbStates.remove(obbState)) { 1989 obbState.unlink(); 1990 } 1991 if (obbStates.isEmpty()) { 1992 mObbMounts.remove(binder); 1993 } 1994 } 1995 1996 mObbPathToStateMap.remove(obbState.filename); 1997 } 1998 1999 private class ObbActionHandler extends Handler { 2000 private boolean mBound = false; 2001 private final List<ObbAction> mActions = new LinkedList<ObbAction>(); 2002 2003 ObbActionHandler(Looper l) { 2004 super(l); 2005 } 2006 2007 @Override 2008 public void handleMessage(Message msg) { 2009 switch (msg.what) { 2010 case OBB_RUN_ACTION: { 2011 final ObbAction action = (ObbAction) msg.obj; 2012 2013 if (DEBUG_OBB) 2014 Slog.i(TAG, "OBB_RUN_ACTION: " + action.toString()); 2015 2016 // If a bind was already initiated we don't really 2017 // need to do anything. The pending install 2018 // will be processed later on. 2019 if (!mBound) { 2020 // If this is the only one pending we might 2021 // have to bind to the service again. 2022 if (!connectToService()) { 2023 Slog.e(TAG, "Failed to bind to media container service"); 2024 action.handleError(); 2025 return; 2026 } 2027 } 2028 2029 mActions.add(action); 2030 break; 2031 } 2032 case OBB_MCS_BOUND: { 2033 if (DEBUG_OBB) 2034 Slog.i(TAG, "OBB_MCS_BOUND"); 2035 if (msg.obj != null) { 2036 mContainerService = (IMediaContainerService) msg.obj; 2037 } 2038 if (mContainerService == null) { 2039 // Something seriously wrong. Bail out 2040 Slog.e(TAG, "Cannot bind to media container service"); 2041 for (ObbAction action : mActions) { 2042 // Indicate service bind error 2043 action.handleError(); 2044 } 2045 mActions.clear(); 2046 } else if (mActions.size() > 0) { 2047 final ObbAction action = mActions.get(0); 2048 if (action != null) { 2049 action.execute(this); 2050 } 2051 } else { 2052 // Should never happen ideally. 2053 Slog.w(TAG, "Empty queue"); 2054 } 2055 break; 2056 } 2057 case OBB_MCS_RECONNECT: { 2058 if (DEBUG_OBB) 2059 Slog.i(TAG, "OBB_MCS_RECONNECT"); 2060 if (mActions.size() > 0) { 2061 if (mBound) { 2062 disconnectService(); 2063 } 2064 if (!connectToService()) { 2065 Slog.e(TAG, "Failed to bind to media container service"); 2066 for (ObbAction action : mActions) { 2067 // Indicate service bind error 2068 action.handleError(); 2069 } 2070 mActions.clear(); 2071 } 2072 } 2073 break; 2074 } 2075 case OBB_MCS_UNBIND: { 2076 if (DEBUG_OBB) 2077 Slog.i(TAG, "OBB_MCS_UNBIND"); 2078 2079 // Delete pending install 2080 if (mActions.size() > 0) { 2081 mActions.remove(0); 2082 } 2083 if (mActions.size() == 0) { 2084 if (mBound) { 2085 disconnectService(); 2086 } 2087 } else { 2088 // There are more pending requests in queue. 2089 // Just post MCS_BOUND message to trigger processing 2090 // of next pending install. 2091 mObbActionHandler.sendEmptyMessage(OBB_MCS_BOUND); 2092 } 2093 break; 2094 } 2095 case OBB_FLUSH_MOUNT_STATE: { 2096 final String path = (String) msg.obj; 2097 2098 if (DEBUG_OBB) 2099 Slog.i(TAG, "Flushing all OBB state for path " + path); 2100 2101 synchronized (mObbMounts) { 2102 final List<ObbState> obbStatesToRemove = new LinkedList<ObbState>(); 2103 2104 final Iterator<Entry<String, ObbState>> i = 2105 mObbPathToStateMap.entrySet().iterator(); 2106 while (i.hasNext()) { 2107 final Entry<String, ObbState> obbEntry = i.next(); 2108 2109 /* 2110 * If this entry's source file is in the volume path 2111 * that got unmounted, remove it because it's no 2112 * longer valid. 2113 */ 2114 if (obbEntry.getKey().startsWith(path)) { 2115 obbStatesToRemove.add(obbEntry.getValue()); 2116 } 2117 } 2118 2119 for (final ObbState obbState : obbStatesToRemove) { 2120 if (DEBUG_OBB) 2121 Slog.i(TAG, "Removing state for " + obbState.filename); 2122 2123 removeObbStateLocked(obbState); 2124 2125 try { 2126 obbState.token.onObbResult(obbState.filename, obbState.nonce, 2127 OnObbStateChangeListener.UNMOUNTED); 2128 } catch (RemoteException e) { 2129 Slog.i(TAG, "Couldn't send unmount notification for OBB: " 2130 + obbState.filename); 2131 } 2132 } 2133 } 2134 break; 2135 } 2136 } 2137 } 2138 2139 private boolean connectToService() { 2140 if (DEBUG_OBB) 2141 Slog.i(TAG, "Trying to bind to DefaultContainerService"); 2142 2143 Intent service = new Intent().setComponent(DEFAULT_CONTAINER_COMPONENT); 2144 if (mContext.bindService(service, mDefContainerConn, Context.BIND_AUTO_CREATE)) { 2145 mBound = true; 2146 return true; 2147 } 2148 return false; 2149 } 2150 2151 private void disconnectService() { 2152 mContainerService = null; 2153 mBound = false; 2154 mContext.unbindService(mDefContainerConn); 2155 } 2156 } 2157 2158 abstract class ObbAction { 2159 private static final int MAX_RETRIES = 3; 2160 private int mRetries; 2161 2162 ObbState mObbState; 2163 2164 ObbAction(ObbState obbState) { 2165 mObbState = obbState; 2166 } 2167 2168 public void execute(ObbActionHandler handler) { 2169 try { 2170 if (DEBUG_OBB) 2171 Slog.i(TAG, "Starting to execute action: " + toString()); 2172 mRetries++; 2173 if (mRetries > MAX_RETRIES) { 2174 Slog.w(TAG, "Failed to invoke remote methods on default container service. Giving up"); 2175 mObbActionHandler.sendEmptyMessage(OBB_MCS_UNBIND); 2176 handleError(); 2177 return; 2178 } else { 2179 handleExecute(); 2180 if (DEBUG_OBB) 2181 Slog.i(TAG, "Posting install MCS_UNBIND"); 2182 mObbActionHandler.sendEmptyMessage(OBB_MCS_UNBIND); 2183 } 2184 } catch (RemoteException e) { 2185 if (DEBUG_OBB) 2186 Slog.i(TAG, "Posting install MCS_RECONNECT"); 2187 mObbActionHandler.sendEmptyMessage(OBB_MCS_RECONNECT); 2188 } catch (Exception e) { 2189 if (DEBUG_OBB) 2190 Slog.d(TAG, "Error handling OBB action", e); 2191 handleError(); 2192 mObbActionHandler.sendEmptyMessage(OBB_MCS_UNBIND); 2193 } 2194 } 2195 2196 abstract void handleExecute() throws RemoteException, IOException; 2197 abstract void handleError(); 2198 2199 protected ObbInfo getObbInfo() throws IOException { 2200 ObbInfo obbInfo; 2201 try { 2202 obbInfo = mContainerService.getObbInfo(mObbState.filename); 2203 } catch (RemoteException e) { 2204 Slog.d(TAG, "Couldn't call DefaultContainerService to fetch OBB info for " 2205 + mObbState.filename); 2206 obbInfo = null; 2207 } 2208 if (obbInfo == null) { 2209 throw new IOException("Couldn't read OBB file: " + mObbState.filename); 2210 } 2211 return obbInfo; 2212 } 2213 2214 protected void sendNewStatusOrIgnore(int status) { 2215 if (mObbState == null || mObbState.token == null) { 2216 return; 2217 } 2218 2219 try { 2220 mObbState.token.onObbResult(mObbState.filename, mObbState.nonce, status); 2221 } catch (RemoteException e) { 2222 Slog.w(TAG, "MountServiceListener went away while calling onObbStateChanged"); 2223 } 2224 } 2225 } 2226 2227 class MountObbAction extends ObbAction { 2228 private final String mKey; 2229 2230 MountObbAction(ObbState obbState, String key) { 2231 super(obbState); 2232 mKey = key; 2233 } 2234 2235 @Override 2236 public void handleExecute() throws IOException, RemoteException { 2237 waitForReady(); 2238 warnOnNotMounted(); 2239 2240 final ObbInfo obbInfo = getObbInfo(); 2241 2242 if (!isUidOwnerOfPackageOrSystem(obbInfo.packageName, mObbState.callerUid)) { 2243 Slog.w(TAG, "Denied attempt to mount OBB " + obbInfo.filename 2244 + " which is owned by " + obbInfo.packageName); 2245 sendNewStatusOrIgnore(OnObbStateChangeListener.ERROR_PERMISSION_DENIED); 2246 return; 2247 } 2248 2249 final boolean isMounted; 2250 synchronized (mObbMounts) { 2251 isMounted = mObbPathToStateMap.containsKey(obbInfo.filename); 2252 } 2253 if (isMounted) { 2254 Slog.w(TAG, "Attempt to mount OBB which is already mounted: " + obbInfo.filename); 2255 sendNewStatusOrIgnore(OnObbStateChangeListener.ERROR_ALREADY_MOUNTED); 2256 return; 2257 } 2258 2259 /* 2260 * The filename passed in might not be the canonical name, so just 2261 * set the filename to the canonicalized version. 2262 */ 2263 mObbState.filename = obbInfo.filename; 2264 2265 final String hashedKey; 2266 if (mKey == null) { 2267 hashedKey = "none"; 2268 } else { 2269 try { 2270 SecretKeyFactory factory = SecretKeyFactory.getInstance("PBKDF2WithHmacSHA1"); 2271 2272 KeySpec ks = new PBEKeySpec(mKey.toCharArray(), obbInfo.salt, 2273 PBKDF2_HASH_ROUNDS, CRYPTO_ALGORITHM_KEY_SIZE); 2274 SecretKey key = factory.generateSecret(ks); 2275 BigInteger bi = new BigInteger(key.getEncoded()); 2276 hashedKey = bi.toString(16); 2277 } catch (NoSuchAlgorithmException e) { 2278 Slog.e(TAG, "Could not load PBKDF2 algorithm", e); 2279 sendNewStatusOrIgnore(OnObbStateChangeListener.ERROR_INTERNAL); 2280 return; 2281 } catch (InvalidKeySpecException e) { 2282 Slog.e(TAG, "Invalid key spec when loading PBKDF2 algorithm", e); 2283 sendNewStatusOrIgnore(OnObbStateChangeListener.ERROR_INTERNAL); 2284 return; 2285 } 2286 } 2287 2288 int rc = StorageResultCode.OperationSucceeded; 2289 try { 2290 mConnector.execute( 2291 "obb", "mount", mObbState.filename, hashedKey, mObbState.callerUid); 2292 } catch (NativeDaemonConnectorException e) { 2293 int code = e.getCode(); 2294 if (code != VoldResponseCode.OpFailedStorageBusy) { 2295 rc = StorageResultCode.OperationFailedInternalError; 2296 } 2297 } 2298 2299 if (rc == StorageResultCode.OperationSucceeded) { 2300 if (DEBUG_OBB) 2301 Slog.d(TAG, "Successfully mounted OBB " + mObbState.filename); 2302 2303 synchronized (mObbMounts) { 2304 addObbStateLocked(mObbState); 2305 } 2306 2307 sendNewStatusOrIgnore(OnObbStateChangeListener.MOUNTED); 2308 } else { 2309 Slog.e(TAG, "Couldn't mount OBB file: " + rc); 2310 2311 sendNewStatusOrIgnore(OnObbStateChangeListener.ERROR_COULD_NOT_MOUNT); 2312 } 2313 } 2314 2315 @Override 2316 public void handleError() { 2317 sendNewStatusOrIgnore(OnObbStateChangeListener.ERROR_INTERNAL); 2318 } 2319 2320 @Override 2321 public String toString() { 2322 StringBuilder sb = new StringBuilder(); 2323 sb.append("MountObbAction{"); 2324 sb.append("filename="); 2325 sb.append(mObbState.filename); 2326 sb.append(",callerUid="); 2327 sb.append(mObbState.callerUid); 2328 sb.append(",token="); 2329 sb.append(mObbState.token != null ? mObbState.token.toString() : "NULL"); 2330 sb.append(",binder="); 2331 sb.append(mObbState.token != null ? mObbState.getBinder().toString() : "null"); 2332 sb.append('}'); 2333 return sb.toString(); 2334 } 2335 } 2336 2337 class UnmountObbAction extends ObbAction { 2338 private final boolean mForceUnmount; 2339 2340 UnmountObbAction(ObbState obbState, boolean force) { 2341 super(obbState); 2342 mForceUnmount = force; 2343 } 2344 2345 @Override 2346 public void handleExecute() throws IOException { 2347 waitForReady(); 2348 warnOnNotMounted(); 2349 2350 final ObbInfo obbInfo = getObbInfo(); 2351 2352 final ObbState obbState; 2353 synchronized (mObbMounts) { 2354 obbState = mObbPathToStateMap.get(obbInfo.filename); 2355 } 2356 2357 if (obbState == null) { 2358 sendNewStatusOrIgnore(OnObbStateChangeListener.ERROR_NOT_MOUNTED); 2359 return; 2360 } 2361 2362 if (obbState.callerUid != mObbState.callerUid) { 2363 Slog.w(TAG, "Permission denied attempting to unmount OBB " + obbInfo.filename 2364 + " (owned by " + obbInfo.packageName + ")"); 2365 sendNewStatusOrIgnore(OnObbStateChangeListener.ERROR_PERMISSION_DENIED); 2366 return; 2367 } 2368 2369 mObbState.filename = obbInfo.filename; 2370 2371 int rc = StorageResultCode.OperationSucceeded; 2372 try { 2373 final Command cmd = new Command("obb", "unmount", mObbState.filename); 2374 if (mForceUnmount) { 2375 cmd.appendArg("force"); 2376 } 2377 mConnector.execute(cmd); 2378 } catch (NativeDaemonConnectorException e) { 2379 int code = e.getCode(); 2380 if (code == VoldResponseCode.OpFailedStorageBusy) { 2381 rc = StorageResultCode.OperationFailedStorageBusy; 2382 } else if (code == VoldResponseCode.OpFailedStorageNotFound) { 2383 // If it's not mounted then we've already won. 2384 rc = StorageResultCode.OperationSucceeded; 2385 } else { 2386 rc = StorageResultCode.OperationFailedInternalError; 2387 } 2388 } 2389 2390 if (rc == StorageResultCode.OperationSucceeded) { 2391 synchronized (mObbMounts) { 2392 removeObbStateLocked(obbState); 2393 } 2394 2395 sendNewStatusOrIgnore(OnObbStateChangeListener.UNMOUNTED); 2396 } else { 2397 Slog.w(TAG, "Could not mount OBB: " + mObbState.filename); 2398 sendNewStatusOrIgnore(OnObbStateChangeListener.ERROR_COULD_NOT_UNMOUNT); 2399 } 2400 } 2401 2402 @Override 2403 public void handleError() { 2404 sendNewStatusOrIgnore(OnObbStateChangeListener.ERROR_INTERNAL); 2405 } 2406 2407 @Override 2408 public String toString() { 2409 StringBuilder sb = new StringBuilder(); 2410 sb.append("UnmountObbAction{"); 2411 sb.append("filename="); 2412 sb.append(mObbState.filename != null ? mObbState.filename : "null"); 2413 sb.append(",force="); 2414 sb.append(mForceUnmount); 2415 sb.append(",callerUid="); 2416 sb.append(mObbState.callerUid); 2417 sb.append(",token="); 2418 sb.append(mObbState.token != null ? mObbState.token.toString() : "null"); 2419 sb.append(",binder="); 2420 sb.append(mObbState.token != null ? mObbState.getBinder().toString() : "null"); 2421 sb.append('}'); 2422 return sb.toString(); 2423 } 2424 } 2425 2426 @Override 2427 protected void dump(FileDescriptor fd, PrintWriter pw, String[] args) { 2428 if (mContext.checkCallingOrSelfPermission(android.Manifest.permission.DUMP) != PackageManager.PERMISSION_GRANTED) { 2429 pw.println("Permission Denial: can't dump ActivityManager from from pid=" 2430 + Binder.getCallingPid() + ", uid=" + Binder.getCallingUid() 2431 + " without permission " + android.Manifest.permission.DUMP); 2432 return; 2433 } 2434 2435 synchronized (mObbMounts) { 2436 pw.println(" mObbMounts:"); 2437 2438 final Iterator<Entry<IBinder, List<ObbState>>> binders = mObbMounts.entrySet().iterator(); 2439 while (binders.hasNext()) { 2440 Entry<IBinder, List<ObbState>> e = binders.next(); 2441 pw.print(" Key="); pw.println(e.getKey().toString()); 2442 final List<ObbState> obbStates = e.getValue(); 2443 for (final ObbState obbState : obbStates) { 2444 pw.print(" "); pw.println(obbState.toString()); 2445 } 2446 } 2447 2448 pw.println(""); 2449 pw.println(" mObbPathToStateMap:"); 2450 final Iterator<Entry<String, ObbState>> maps = mObbPathToStateMap.entrySet().iterator(); 2451 while (maps.hasNext()) { 2452 final Entry<String, ObbState> e = maps.next(); 2453 pw.print(" "); pw.print(e.getKey()); 2454 pw.print(" -> "); pw.println(e.getValue().toString()); 2455 } 2456 } 2457 2458 pw.println(""); 2459 2460 synchronized (mVolumes) { 2461 pw.println(" mVolumes:"); 2462 2463 final int N = mVolumes.size(); 2464 for (int i = 0; i < N; i++) { 2465 final StorageVolume v = mVolumes.get(i); 2466 pw.print(" "); 2467 pw.println(v.toString()); 2468 } 2469 } 2470 2471 pw.println(); 2472 pw.println(" mConnection:"); 2473 mConnector.dump(fd, pw, args); 2474 } 2475 2476 /** {@inheritDoc} */ 2477 public void monitor() { 2478 if (mConnector != null) { 2479 mConnector.monitor(); 2480 } 2481 } 2482 } 2483