MountService.java revision 5ac72a29593ab9a20337a2225df52bdf4754be02
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 17package com.android.server; 18 19import com.android.internal.app.IMediaContainerService; 20import com.android.internal.util.XmlUtils; 21import com.android.server.am.ActivityManagerService; 22import com.android.server.pm.PackageManagerService; 23import com.android.server.NativeDaemonConnector.Command; 24 25import android.Manifest; 26import android.content.BroadcastReceiver; 27import android.content.ComponentName; 28import android.content.Context; 29import android.content.Intent; 30import android.content.IntentFilter; 31import android.content.ServiceConnection; 32import android.content.pm.PackageManager; 33import android.content.res.ObbInfo; 34import android.content.res.Resources; 35import android.content.res.TypedArray; 36import android.content.res.XmlResourceParser; 37import android.hardware.usb.UsbManager; 38import android.net.Uri; 39import android.os.Binder; 40import android.os.Environment; 41import android.os.Handler; 42import android.os.HandlerThread; 43import android.os.IBinder; 44import android.os.Looper; 45import android.os.Message; 46import android.os.Parcelable; 47import android.os.RemoteException; 48import android.os.ServiceManager; 49import android.os.SystemClock; 50import android.os.SystemProperties; 51import android.os.UserHandle; 52import android.os.storage.IMountService; 53import android.os.storage.IMountServiceListener; 54import android.os.storage.IMountShutdownObserver; 55import android.os.storage.IObbActionListener; 56import android.os.storage.OnObbStateChangeListener; 57import android.os.storage.StorageResultCode; 58import android.os.storage.StorageVolume; 59import android.text.TextUtils; 60import android.util.AttributeSet; 61import android.util.Slog; 62import android.util.Xml; 63 64import org.xmlpull.v1.XmlPullParser; 65import org.xmlpull.v1.XmlPullParserException; 66 67import java.io.FileDescriptor; 68import java.io.IOException; 69import java.io.PrintWriter; 70import java.math.BigInteger; 71import java.security.NoSuchAlgorithmException; 72import java.security.spec.InvalidKeySpecException; 73import java.security.spec.KeySpec; 74import java.util.ArrayList; 75import java.util.HashMap; 76import java.util.HashSet; 77import java.util.Iterator; 78import java.util.LinkedList; 79import java.util.List; 80import java.util.Map; 81import java.util.Map.Entry; 82import java.util.concurrent.CountDownLatch; 83import java.util.concurrent.TimeUnit; 84import java.util.Set; 85 86import javax.crypto.SecretKey; 87import javax.crypto.SecretKeyFactory; 88import 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 */ 96class 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.sendBroadcastAsUser(intent, UserHandle.ALL); 1051 } 1052 1053 private void sendUmsIntent(boolean c) { 1054 mContext.sendBroadcastAsUser( 1055 new Intent((c ? Intent.ACTION_UMS_CONNECTED : Intent.ACTION_UMS_DISCONNECTED)), 1056 UserHandle.ALL); 1057 } 1058 1059 private void validatePermission(String perm) { 1060 if (mContext.checkCallingOrSelfPermission(perm) != PackageManager.PERMISSION_GRANTED) { 1061 throw new SecurityException(String.format("Requires %s permission", perm)); 1062 } 1063 } 1064 1065 // Storage list XML tags 1066 private static final String TAG_STORAGE_LIST = "StorageList"; 1067 private static final String TAG_STORAGE = "storage"; 1068 1069 private void readStorageList() { 1070 Resources resources = mContext.getResources(); 1071 1072 int id = com.android.internal.R.xml.storage_list; 1073 XmlResourceParser parser = resources.getXml(id); 1074 AttributeSet attrs = Xml.asAttributeSet(parser); 1075 1076 try { 1077 XmlUtils.beginDocument(parser, TAG_STORAGE_LIST); 1078 while (true) { 1079 XmlUtils.nextElement(parser); 1080 1081 String element = parser.getName(); 1082 if (element == null) break; 1083 1084 if (TAG_STORAGE.equals(element)) { 1085 TypedArray a = resources.obtainAttributes(attrs, 1086 com.android.internal.R.styleable.Storage); 1087 1088 CharSequence path = a.getText( 1089 com.android.internal.R.styleable.Storage_mountPoint); 1090 int descriptionId = a.getResourceId( 1091 com.android.internal.R.styleable.Storage_storageDescription, -1); 1092 CharSequence description = a.getText( 1093 com.android.internal.R.styleable.Storage_storageDescription); 1094 boolean primary = a.getBoolean( 1095 com.android.internal.R.styleable.Storage_primary, false); 1096 boolean removable = a.getBoolean( 1097 com.android.internal.R.styleable.Storage_removable, false); 1098 boolean emulated = a.getBoolean( 1099 com.android.internal.R.styleable.Storage_emulated, false); 1100 int mtpReserve = a.getInt( 1101 com.android.internal.R.styleable.Storage_mtpReserve, 0); 1102 boolean allowMassStorage = a.getBoolean( 1103 com.android.internal.R.styleable.Storage_allowMassStorage, false); 1104 // resource parser does not support longs, so XML value is in megabytes 1105 long maxFileSize = a.getInt( 1106 com.android.internal.R.styleable.Storage_maxFileSize, 0) * 1024L * 1024L; 1107 1108 Slog.d(TAG, "got storage path: " + path + " description: " + description + 1109 " primary: " + primary + " removable: " + removable + 1110 " emulated: " + emulated + " mtpReserve: " + mtpReserve + 1111 " allowMassStorage: " + allowMassStorage + 1112 " maxFileSize: " + maxFileSize); 1113 if (path == null || description == null) { 1114 Slog.e(TAG, "path or description is null in readStorageList"); 1115 } else { 1116 String pathString = path.toString(); 1117 StorageVolume volume = new StorageVolume(pathString, 1118 descriptionId, removable, emulated, 1119 mtpReserve, allowMassStorage, maxFileSize); 1120 if (primary) { 1121 if (mPrimaryVolume == null) { 1122 mPrimaryVolume = volume; 1123 } else { 1124 Slog.e(TAG, "multiple primary volumes in storage list"); 1125 } 1126 } 1127 if (mPrimaryVolume == volume) { 1128 // primay volume must be first 1129 mVolumes.add(0, volume); 1130 } else { 1131 mVolumes.add(volume); 1132 } 1133 mVolumeMap.put(pathString, volume); 1134 } 1135 a.recycle(); 1136 } 1137 } 1138 } catch (XmlPullParserException e) { 1139 throw new RuntimeException(e); 1140 } catch (IOException e) { 1141 throw new RuntimeException(e); 1142 } finally { 1143 // compute storage ID for each volume 1144 int length = mVolumes.size(); 1145 for (int i = 0; i < length; i++) { 1146 mVolumes.get(i).setStorageId(i); 1147 } 1148 parser.close(); 1149 } 1150 } 1151 1152 /** 1153 * Constructs a new MountService instance 1154 * 1155 * @param context Binder context for this service 1156 */ 1157 public MountService(Context context) { 1158 mContext = context; 1159 readStorageList(); 1160 1161 if (mPrimaryVolume != null) { 1162 mExternalStoragePath = mPrimaryVolume.getPath(); 1163 mEmulateExternalStorage = mPrimaryVolume.isEmulated(); 1164 if (mEmulateExternalStorage) { 1165 Slog.d(TAG, "using emulated external storage"); 1166 mVolumeStates.put(mExternalStoragePath, Environment.MEDIA_MOUNTED); 1167 } 1168 } 1169 1170 // XXX: This will go away soon in favor of IMountServiceObserver 1171 mPms = (PackageManagerService) ServiceManager.getService("package"); 1172 1173 IntentFilter filter = new IntentFilter(); 1174 filter.addAction(Intent.ACTION_BOOT_COMPLETED); 1175 // don't bother monitoring USB if mass storage is not supported on our primary volume 1176 if (mPrimaryVolume != null && mPrimaryVolume.allowMassStorage()) { 1177 filter.addAction(UsbManager.ACTION_USB_STATE); 1178 } 1179 mContext.registerReceiver(mBroadcastReceiver, filter, null, null); 1180 1181 mHandlerThread = new HandlerThread("MountService"); 1182 mHandlerThread.start(); 1183 mHandler = new MountServiceHandler(mHandlerThread.getLooper()); 1184 1185 // Add OBB Action Handler to MountService thread. 1186 mObbActionHandler = new ObbActionHandler(mHandlerThread.getLooper()); 1187 1188 /* 1189 * Create the connection to vold with a maximum queue of twice the 1190 * amount of containers we'd ever expect to have. This keeps an 1191 * "asec list" from blocking a thread repeatedly. 1192 */ 1193 mConnector = new NativeDaemonConnector(this, "vold", MAX_CONTAINERS * 2, VOLD_TAG, 25); 1194 1195 Thread thread = new Thread(mConnector, VOLD_TAG); 1196 thread.start(); 1197 1198 // Add ourself to the Watchdog monitors if enabled. 1199 if (WATCHDOG_ENABLE) { 1200 Watchdog.getInstance().addMonitor(this); 1201 } 1202 } 1203 1204 /** 1205 * Exposed API calls below here 1206 */ 1207 1208 public void registerListener(IMountServiceListener listener) { 1209 synchronized (mListeners) { 1210 MountServiceBinderListener bl = new MountServiceBinderListener(listener); 1211 try { 1212 listener.asBinder().linkToDeath(bl, 0); 1213 mListeners.add(bl); 1214 } catch (RemoteException rex) { 1215 Slog.e(TAG, "Failed to link to listener death"); 1216 } 1217 } 1218 } 1219 1220 public void unregisterListener(IMountServiceListener listener) { 1221 synchronized (mListeners) { 1222 for(MountServiceBinderListener bl : mListeners) { 1223 if (bl.mListener == listener) { 1224 mListeners.remove(mListeners.indexOf(bl)); 1225 listener.asBinder().unlinkToDeath(bl, 0); 1226 return; 1227 } 1228 } 1229 } 1230 } 1231 1232 public void shutdown(final IMountShutdownObserver observer) { 1233 validatePermission(android.Manifest.permission.SHUTDOWN); 1234 1235 Slog.i(TAG, "Shutting down"); 1236 synchronized (mVolumeStates) { 1237 for (String path : mVolumeStates.keySet()) { 1238 String state = mVolumeStates.get(path); 1239 1240 if (state.equals(Environment.MEDIA_SHARED)) { 1241 /* 1242 * If the media is currently shared, unshare it. 1243 * XXX: This is still dangerous!. We should not 1244 * be rebooting at *all* if UMS is enabled, since 1245 * the UMS host could have dirty FAT cache entries 1246 * yet to flush. 1247 */ 1248 setUsbMassStorageEnabled(false); 1249 } else if (state.equals(Environment.MEDIA_CHECKING)) { 1250 /* 1251 * If the media is being checked, then we need to wait for 1252 * it to complete before being able to proceed. 1253 */ 1254 // XXX: @hackbod - Should we disable the ANR timer here? 1255 int retries = 30; 1256 while (state.equals(Environment.MEDIA_CHECKING) && (retries-- >=0)) { 1257 try { 1258 Thread.sleep(1000); 1259 } catch (InterruptedException iex) { 1260 Slog.e(TAG, "Interrupted while waiting for media", iex); 1261 break; 1262 } 1263 state = Environment.getExternalStorageState(); 1264 } 1265 if (retries == 0) { 1266 Slog.e(TAG, "Timed out waiting for media to check"); 1267 } 1268 } 1269 1270 if (state.equals(Environment.MEDIA_MOUNTED)) { 1271 // Post a unmount message. 1272 ShutdownCallBack ucb = new ShutdownCallBack(path, observer); 1273 mHandler.sendMessage(mHandler.obtainMessage(H_UNMOUNT_PM_UPDATE, ucb)); 1274 } else if (observer != null) { 1275 /* 1276 * Observer is waiting for onShutDownComplete when we are done. 1277 * Since nothing will be done send notification directly so shutdown 1278 * sequence can continue. 1279 */ 1280 try { 1281 observer.onShutDownComplete(StorageResultCode.OperationSucceeded); 1282 } catch (RemoteException e) { 1283 Slog.w(TAG, "RemoteException when shutting down"); 1284 } 1285 } 1286 } 1287 } 1288 } 1289 1290 private boolean getUmsEnabling() { 1291 synchronized (mListeners) { 1292 return mUmsEnabling; 1293 } 1294 } 1295 1296 private void setUmsEnabling(boolean enable) { 1297 synchronized (mListeners) { 1298 mUmsEnabling = enable; 1299 } 1300 } 1301 1302 public boolean isUsbMassStorageConnected() { 1303 waitForReady(); 1304 1305 if (getUmsEnabling()) { 1306 return true; 1307 } 1308 synchronized (mListeners) { 1309 return mUmsAvailable; 1310 } 1311 } 1312 1313 public void setUsbMassStorageEnabled(boolean enable) { 1314 waitForReady(); 1315 validatePermission(android.Manifest.permission.MOUNT_UNMOUNT_FILESYSTEMS); 1316 1317 // TODO: Add support for multiple share methods 1318 1319 /* 1320 * If the volume is mounted and we're enabling then unmount it 1321 */ 1322 String path = Environment.getExternalStorageDirectory().getPath(); 1323 String vs = getVolumeState(path); 1324 String method = "ums"; 1325 if (enable && vs.equals(Environment.MEDIA_MOUNTED)) { 1326 // Override for isUsbMassStorageEnabled() 1327 setUmsEnabling(enable); 1328 UmsEnableCallBack umscb = new UmsEnableCallBack(path, method, true); 1329 mHandler.sendMessage(mHandler.obtainMessage(H_UNMOUNT_PM_UPDATE, umscb)); 1330 // Clear override 1331 setUmsEnabling(false); 1332 } 1333 /* 1334 * If we disabled UMS then mount the volume 1335 */ 1336 if (!enable) { 1337 doShareUnshareVolume(path, method, enable); 1338 if (doMountVolume(path) != StorageResultCode.OperationSucceeded) { 1339 Slog.e(TAG, "Failed to remount " + path + 1340 " after disabling share method " + method); 1341 /* 1342 * Even though the mount failed, the unshare didn't so don't indicate an error. 1343 * The mountVolume() call will have set the storage state and sent the necessary 1344 * broadcasts. 1345 */ 1346 } 1347 } 1348 } 1349 1350 public boolean isUsbMassStorageEnabled() { 1351 waitForReady(); 1352 return doGetVolumeShared(Environment.getExternalStorageDirectory().getPath(), "ums"); 1353 } 1354 1355 /** 1356 * @return state of the volume at the specified mount point 1357 */ 1358 public String getVolumeState(String mountPoint) { 1359 synchronized (mVolumeStates) { 1360 String state = mVolumeStates.get(mountPoint); 1361 if (state == null) { 1362 Slog.w(TAG, "getVolumeState(" + mountPoint + "): Unknown volume"); 1363 if (SystemProperties.get("vold.encrypt_progress").length() != 0) { 1364 state = Environment.MEDIA_REMOVED; 1365 } else { 1366 throw new IllegalArgumentException(); 1367 } 1368 } 1369 1370 return state; 1371 } 1372 } 1373 1374 public boolean isExternalStorageEmulated() { 1375 return mEmulateExternalStorage; 1376 } 1377 1378 public int mountVolume(String path) { 1379 validatePermission(android.Manifest.permission.MOUNT_UNMOUNT_FILESYSTEMS); 1380 1381 waitForReady(); 1382 return doMountVolume(path); 1383 } 1384 1385 public void unmountVolume(String path, boolean force, boolean removeEncryption) { 1386 validatePermission(android.Manifest.permission.MOUNT_UNMOUNT_FILESYSTEMS); 1387 waitForReady(); 1388 1389 String volState = getVolumeState(path); 1390 if (DEBUG_UNMOUNT) { 1391 Slog.i(TAG, "Unmounting " + path 1392 + " force = " + force 1393 + " removeEncryption = " + removeEncryption); 1394 } 1395 if (Environment.MEDIA_UNMOUNTED.equals(volState) || 1396 Environment.MEDIA_REMOVED.equals(volState) || 1397 Environment.MEDIA_SHARED.equals(volState) || 1398 Environment.MEDIA_UNMOUNTABLE.equals(volState)) { 1399 // Media already unmounted or cannot be unmounted. 1400 // TODO return valid return code when adding observer call back. 1401 return; 1402 } 1403 UnmountCallBack ucb = new UnmountCallBack(path, force, removeEncryption); 1404 mHandler.sendMessage(mHandler.obtainMessage(H_UNMOUNT_PM_UPDATE, ucb)); 1405 } 1406 1407 public int formatVolume(String path) { 1408 validatePermission(android.Manifest.permission.MOUNT_FORMAT_FILESYSTEMS); 1409 waitForReady(); 1410 1411 return doFormatVolume(path); 1412 } 1413 1414 public int[] getStorageUsers(String path) { 1415 validatePermission(android.Manifest.permission.MOUNT_UNMOUNT_FILESYSTEMS); 1416 waitForReady(); 1417 try { 1418 final String[] r = NativeDaemonEvent.filterMessageList( 1419 mConnector.executeForList("storage", "users", path), 1420 VoldResponseCode.StorageUsersListResult); 1421 1422 // FMT: <pid> <process name> 1423 int[] data = new int[r.length]; 1424 for (int i = 0; i < r.length; i++) { 1425 String[] tok = r[i].split(" "); 1426 try { 1427 data[i] = Integer.parseInt(tok[0]); 1428 } catch (NumberFormatException nfe) { 1429 Slog.e(TAG, String.format("Error parsing pid %s", tok[0])); 1430 return new int[0]; 1431 } 1432 } 1433 return data; 1434 } catch (NativeDaemonConnectorException e) { 1435 Slog.e(TAG, "Failed to retrieve storage users list", e); 1436 return new int[0]; 1437 } 1438 } 1439 1440 private void warnOnNotMounted() { 1441 if (!Environment.getExternalStorageState().equals(Environment.MEDIA_MOUNTED)) { 1442 Slog.w(TAG, "getSecureContainerList() called when storage not mounted"); 1443 } 1444 } 1445 1446 public String[] getSecureContainerList() { 1447 validatePermission(android.Manifest.permission.ASEC_ACCESS); 1448 waitForReady(); 1449 warnOnNotMounted(); 1450 1451 try { 1452 return NativeDaemonEvent.filterMessageList( 1453 mConnector.executeForList("asec", "list"), VoldResponseCode.AsecListResult); 1454 } catch (NativeDaemonConnectorException e) { 1455 return new String[0]; 1456 } 1457 } 1458 1459 public int createSecureContainer(String id, int sizeMb, String fstype, String key, 1460 int ownerUid, boolean external) { 1461 validatePermission(android.Manifest.permission.ASEC_CREATE); 1462 waitForReady(); 1463 warnOnNotMounted(); 1464 1465 int rc = StorageResultCode.OperationSucceeded; 1466 try { 1467 mConnector.execute("asec", "create", id, sizeMb, fstype, key, ownerUid, 1468 external ? "1" : "0"); 1469 } catch (NativeDaemonConnectorException e) { 1470 rc = StorageResultCode.OperationFailedInternalError; 1471 } 1472 1473 if (rc == StorageResultCode.OperationSucceeded) { 1474 synchronized (mAsecMountSet) { 1475 mAsecMountSet.add(id); 1476 } 1477 } 1478 return rc; 1479 } 1480 1481 public int finalizeSecureContainer(String id) { 1482 validatePermission(android.Manifest.permission.ASEC_CREATE); 1483 warnOnNotMounted(); 1484 1485 int rc = StorageResultCode.OperationSucceeded; 1486 try { 1487 mConnector.execute("asec", "finalize", id); 1488 /* 1489 * Finalization does a remount, so no need 1490 * to update mAsecMountSet 1491 */ 1492 } catch (NativeDaemonConnectorException e) { 1493 rc = StorageResultCode.OperationFailedInternalError; 1494 } 1495 return rc; 1496 } 1497 1498 public int fixPermissionsSecureContainer(String id, int gid, String filename) { 1499 validatePermission(android.Manifest.permission.ASEC_CREATE); 1500 warnOnNotMounted(); 1501 1502 int rc = StorageResultCode.OperationSucceeded; 1503 try { 1504 mConnector.execute("asec", "fixperms", id, gid, filename); 1505 /* 1506 * Fix permissions does a remount, so no need to update 1507 * mAsecMountSet 1508 */ 1509 } catch (NativeDaemonConnectorException e) { 1510 rc = StorageResultCode.OperationFailedInternalError; 1511 } 1512 return rc; 1513 } 1514 1515 public int destroySecureContainer(String id, boolean force) { 1516 validatePermission(android.Manifest.permission.ASEC_DESTROY); 1517 waitForReady(); 1518 warnOnNotMounted(); 1519 1520 /* 1521 * Force a GC to make sure AssetManagers in other threads of the 1522 * system_server are cleaned up. We have to do this since AssetManager 1523 * instances are kept as a WeakReference and it's possible we have files 1524 * open on the external storage. 1525 */ 1526 Runtime.getRuntime().gc(); 1527 1528 int rc = StorageResultCode.OperationSucceeded; 1529 try { 1530 final Command cmd = new Command("asec", "destroy", id); 1531 if (force) { 1532 cmd.appendArg("force"); 1533 } 1534 mConnector.execute(cmd); 1535 } catch (NativeDaemonConnectorException e) { 1536 int code = e.getCode(); 1537 if (code == VoldResponseCode.OpFailedStorageBusy) { 1538 rc = StorageResultCode.OperationFailedStorageBusy; 1539 } else { 1540 rc = StorageResultCode.OperationFailedInternalError; 1541 } 1542 } 1543 1544 if (rc == StorageResultCode.OperationSucceeded) { 1545 synchronized (mAsecMountSet) { 1546 if (mAsecMountSet.contains(id)) { 1547 mAsecMountSet.remove(id); 1548 } 1549 } 1550 } 1551 1552 return rc; 1553 } 1554 1555 public int mountSecureContainer(String id, String key, int ownerUid) { 1556 validatePermission(android.Manifest.permission.ASEC_MOUNT_UNMOUNT); 1557 waitForReady(); 1558 warnOnNotMounted(); 1559 1560 synchronized (mAsecMountSet) { 1561 if (mAsecMountSet.contains(id)) { 1562 return StorageResultCode.OperationFailedStorageMounted; 1563 } 1564 } 1565 1566 int rc = StorageResultCode.OperationSucceeded; 1567 try { 1568 mConnector.execute("asec", "mount", id, key, ownerUid); 1569 } catch (NativeDaemonConnectorException e) { 1570 int code = e.getCode(); 1571 if (code != VoldResponseCode.OpFailedStorageBusy) { 1572 rc = StorageResultCode.OperationFailedInternalError; 1573 } 1574 } 1575 1576 if (rc == StorageResultCode.OperationSucceeded) { 1577 synchronized (mAsecMountSet) { 1578 mAsecMountSet.add(id); 1579 } 1580 } 1581 return rc; 1582 } 1583 1584 public int unmountSecureContainer(String id, boolean force) { 1585 validatePermission(android.Manifest.permission.ASEC_MOUNT_UNMOUNT); 1586 waitForReady(); 1587 warnOnNotMounted(); 1588 1589 synchronized (mAsecMountSet) { 1590 if (!mAsecMountSet.contains(id)) { 1591 return StorageResultCode.OperationFailedStorageNotMounted; 1592 } 1593 } 1594 1595 /* 1596 * Force a GC to make sure AssetManagers in other threads of the 1597 * system_server are cleaned up. We have to do this since AssetManager 1598 * instances are kept as a WeakReference and it's possible we have files 1599 * open on the external storage. 1600 */ 1601 Runtime.getRuntime().gc(); 1602 1603 int rc = StorageResultCode.OperationSucceeded; 1604 try { 1605 final Command cmd = new Command("asec", "unmount", id); 1606 if (force) { 1607 cmd.appendArg("force"); 1608 } 1609 mConnector.execute(cmd); 1610 } catch (NativeDaemonConnectorException e) { 1611 int code = e.getCode(); 1612 if (code == VoldResponseCode.OpFailedStorageBusy) { 1613 rc = StorageResultCode.OperationFailedStorageBusy; 1614 } else { 1615 rc = StorageResultCode.OperationFailedInternalError; 1616 } 1617 } 1618 1619 if (rc == StorageResultCode.OperationSucceeded) { 1620 synchronized (mAsecMountSet) { 1621 mAsecMountSet.remove(id); 1622 } 1623 } 1624 return rc; 1625 } 1626 1627 public boolean isSecureContainerMounted(String id) { 1628 validatePermission(android.Manifest.permission.ASEC_ACCESS); 1629 waitForReady(); 1630 warnOnNotMounted(); 1631 1632 synchronized (mAsecMountSet) { 1633 return mAsecMountSet.contains(id); 1634 } 1635 } 1636 1637 public int renameSecureContainer(String oldId, String newId) { 1638 validatePermission(android.Manifest.permission.ASEC_RENAME); 1639 waitForReady(); 1640 warnOnNotMounted(); 1641 1642 synchronized (mAsecMountSet) { 1643 /* 1644 * Because a mounted container has active internal state which cannot be 1645 * changed while active, we must ensure both ids are not currently mounted. 1646 */ 1647 if (mAsecMountSet.contains(oldId) || mAsecMountSet.contains(newId)) { 1648 return StorageResultCode.OperationFailedStorageMounted; 1649 } 1650 } 1651 1652 int rc = StorageResultCode.OperationSucceeded; 1653 try { 1654 mConnector.execute("asec", "rename", oldId, newId); 1655 } catch (NativeDaemonConnectorException e) { 1656 rc = StorageResultCode.OperationFailedInternalError; 1657 } 1658 1659 return rc; 1660 } 1661 1662 public String getSecureContainerPath(String id) { 1663 validatePermission(android.Manifest.permission.ASEC_ACCESS); 1664 waitForReady(); 1665 warnOnNotMounted(); 1666 1667 final NativeDaemonEvent event; 1668 try { 1669 event = mConnector.execute("asec", "path", id); 1670 event.checkCode(VoldResponseCode.AsecPathResult); 1671 return event.getMessage(); 1672 } catch (NativeDaemonConnectorException e) { 1673 int code = e.getCode(); 1674 if (code == VoldResponseCode.OpFailedStorageNotFound) { 1675 Slog.i(TAG, String.format("Container '%s' not found", id)); 1676 return null; 1677 } else { 1678 throw new IllegalStateException(String.format("Unexpected response code %d", code)); 1679 } 1680 } 1681 } 1682 1683 public String getSecureContainerFilesystemPath(String id) { 1684 validatePermission(android.Manifest.permission.ASEC_ACCESS); 1685 waitForReady(); 1686 warnOnNotMounted(); 1687 1688 final NativeDaemonEvent event; 1689 try { 1690 event = mConnector.execute("asec", "fspath", id); 1691 event.checkCode(VoldResponseCode.AsecPathResult); 1692 return event.getMessage(); 1693 } catch (NativeDaemonConnectorException e) { 1694 int code = e.getCode(); 1695 if (code == VoldResponseCode.OpFailedStorageNotFound) { 1696 Slog.i(TAG, String.format("Container '%s' not found", id)); 1697 return null; 1698 } else { 1699 throw new IllegalStateException(String.format("Unexpected response code %d", code)); 1700 } 1701 } 1702 } 1703 1704 public void finishMediaUpdate() { 1705 mHandler.sendEmptyMessage(H_UNMOUNT_PM_DONE); 1706 } 1707 1708 private boolean isUidOwnerOfPackageOrSystem(String packageName, int callerUid) { 1709 if (callerUid == android.os.Process.SYSTEM_UID) { 1710 return true; 1711 } 1712 1713 if (packageName == null) { 1714 return false; 1715 } 1716 1717 final int packageUid = mPms.getPackageUid(packageName, UserHandle.getUserId(callerUid)); 1718 1719 if (DEBUG_OBB) { 1720 Slog.d(TAG, "packageName = " + packageName + ", packageUid = " + 1721 packageUid + ", callerUid = " + callerUid); 1722 } 1723 1724 return callerUid == packageUid; 1725 } 1726 1727 public String getMountedObbPath(String filename) { 1728 if (filename == null) { 1729 throw new IllegalArgumentException("filename cannot be null"); 1730 } 1731 1732 waitForReady(); 1733 warnOnNotMounted(); 1734 1735 final NativeDaemonEvent event; 1736 try { 1737 event = mConnector.execute("obb", "path", filename); 1738 event.checkCode(VoldResponseCode.AsecPathResult); 1739 return event.getMessage(); 1740 } catch (NativeDaemonConnectorException e) { 1741 int code = e.getCode(); 1742 if (code == VoldResponseCode.OpFailedStorageNotFound) { 1743 return null; 1744 } else { 1745 throw new IllegalStateException(String.format("Unexpected response code %d", code)); 1746 } 1747 } 1748 } 1749 1750 public boolean isObbMounted(String filename) { 1751 if (filename == null) { 1752 throw new IllegalArgumentException("filename cannot be null"); 1753 } 1754 1755 synchronized (mObbMounts) { 1756 return mObbPathToStateMap.containsKey(filename); 1757 } 1758 } 1759 1760 public void mountObb(String filename, String key, IObbActionListener token, int nonce) 1761 throws RemoteException { 1762 if (filename == null) { 1763 throw new IllegalArgumentException("filename cannot be null"); 1764 } 1765 1766 if (token == null) { 1767 throw new IllegalArgumentException("token cannot be null"); 1768 } 1769 1770 final int callerUid = Binder.getCallingUid(); 1771 final ObbState obbState = new ObbState(filename, callerUid, token, nonce); 1772 final ObbAction action = new MountObbAction(obbState, key); 1773 mObbActionHandler.sendMessage(mObbActionHandler.obtainMessage(OBB_RUN_ACTION, action)); 1774 1775 if (DEBUG_OBB) 1776 Slog.i(TAG, "Send to OBB handler: " + action.toString()); 1777 } 1778 1779 public void unmountObb(String filename, boolean force, IObbActionListener token, int nonce) 1780 throws RemoteException { 1781 if (filename == null) { 1782 throw new IllegalArgumentException("filename cannot be null"); 1783 } 1784 1785 final int callerUid = Binder.getCallingUid(); 1786 final ObbState obbState = new ObbState(filename, callerUid, token, nonce); 1787 final ObbAction action = new UnmountObbAction(obbState, force); 1788 mObbActionHandler.sendMessage(mObbActionHandler.obtainMessage(OBB_RUN_ACTION, action)); 1789 1790 if (DEBUG_OBB) 1791 Slog.i(TAG, "Send to OBB handler: " + action.toString()); 1792 } 1793 1794 @Override 1795 public int getEncryptionState() { 1796 mContext.enforceCallingOrSelfPermission(Manifest.permission.CRYPT_KEEPER, 1797 "no permission to access the crypt keeper"); 1798 1799 waitForReady(); 1800 1801 final NativeDaemonEvent event; 1802 try { 1803 event = mConnector.execute("cryptfs", "cryptocomplete"); 1804 return Integer.parseInt(event.getMessage()); 1805 } catch (NumberFormatException e) { 1806 // Bad result - unexpected. 1807 Slog.w(TAG, "Unable to parse result from cryptfs cryptocomplete"); 1808 return ENCRYPTION_STATE_ERROR_UNKNOWN; 1809 } catch (NativeDaemonConnectorException e) { 1810 // Something bad happened. 1811 Slog.w(TAG, "Error in communicating with cryptfs in validating"); 1812 return ENCRYPTION_STATE_ERROR_UNKNOWN; 1813 } 1814 } 1815 1816 @Override 1817 public int decryptStorage(String password) { 1818 if (TextUtils.isEmpty(password)) { 1819 throw new IllegalArgumentException("password cannot be empty"); 1820 } 1821 1822 mContext.enforceCallingOrSelfPermission(Manifest.permission.CRYPT_KEEPER, 1823 "no permission to access the crypt keeper"); 1824 1825 waitForReady(); 1826 1827 if (DEBUG_EVENTS) { 1828 Slog.i(TAG, "decrypting storage..."); 1829 } 1830 1831 final NativeDaemonEvent event; 1832 try { 1833 event = mConnector.execute("cryptfs", "checkpw", password); 1834 1835 final int code = Integer.parseInt(event.getMessage()); 1836 if (code == 0) { 1837 // Decrypt was successful. Post a delayed message before restarting in order 1838 // to let the UI to clear itself 1839 mHandler.postDelayed(new Runnable() { 1840 public void run() { 1841 try { 1842 mConnector.execute("cryptfs", "restart"); 1843 } catch (NativeDaemonConnectorException e) { 1844 Slog.e(TAG, "problem executing in background", e); 1845 } 1846 } 1847 }, 1000); // 1 second 1848 } 1849 1850 return code; 1851 } catch (NativeDaemonConnectorException e) { 1852 // Decryption failed 1853 return e.getCode(); 1854 } 1855 } 1856 1857 public int encryptStorage(String password) { 1858 if (TextUtils.isEmpty(password)) { 1859 throw new IllegalArgumentException("password cannot be empty"); 1860 } 1861 1862 mContext.enforceCallingOrSelfPermission(Manifest.permission.CRYPT_KEEPER, 1863 "no permission to access the crypt keeper"); 1864 1865 waitForReady(); 1866 1867 if (DEBUG_EVENTS) { 1868 Slog.i(TAG, "encrypting storage..."); 1869 } 1870 1871 try { 1872 mConnector.execute("cryptfs", "enablecrypto", "inplace", password); 1873 } catch (NativeDaemonConnectorException e) { 1874 // Encryption failed 1875 return e.getCode(); 1876 } 1877 1878 return 0; 1879 } 1880 1881 public int changeEncryptionPassword(String password) { 1882 if (TextUtils.isEmpty(password)) { 1883 throw new IllegalArgumentException("password cannot be empty"); 1884 } 1885 1886 mContext.enforceCallingOrSelfPermission(Manifest.permission.CRYPT_KEEPER, 1887 "no permission to access the crypt keeper"); 1888 1889 waitForReady(); 1890 1891 if (DEBUG_EVENTS) { 1892 Slog.i(TAG, "changing encryption password..."); 1893 } 1894 1895 final NativeDaemonEvent event; 1896 try { 1897 event = mConnector.execute("cryptfs", "changepw", password); 1898 return Integer.parseInt(event.getMessage()); 1899 } catch (NativeDaemonConnectorException e) { 1900 // Encryption failed 1901 return e.getCode(); 1902 } 1903 } 1904 1905 /** 1906 * Validate a user-supplied password string with cryptfs 1907 */ 1908 @Override 1909 public int verifyEncryptionPassword(String password) throws RemoteException { 1910 // Only the system process is permitted to validate passwords 1911 if (Binder.getCallingUid() != android.os.Process.SYSTEM_UID) { 1912 throw new SecurityException("no permission to access the crypt keeper"); 1913 } 1914 1915 mContext.enforceCallingOrSelfPermission(Manifest.permission.CRYPT_KEEPER, 1916 "no permission to access the crypt keeper"); 1917 1918 if (TextUtils.isEmpty(password)) { 1919 throw new IllegalArgumentException("password cannot be empty"); 1920 } 1921 1922 waitForReady(); 1923 1924 if (DEBUG_EVENTS) { 1925 Slog.i(TAG, "validating encryption password..."); 1926 } 1927 1928 final NativeDaemonEvent event; 1929 try { 1930 event = mConnector.execute("cryptfs", "verifypw", password); 1931 Slog.i(TAG, "cryptfs verifypw => " + event.getMessage()); 1932 return Integer.parseInt(event.getMessage()); 1933 } catch (NativeDaemonConnectorException e) { 1934 // Encryption failed 1935 return e.getCode(); 1936 } 1937 } 1938 1939 public Parcelable[] getVolumeList() { 1940 synchronized(mVolumes) { 1941 int size = mVolumes.size(); 1942 Parcelable[] result = new Parcelable[size]; 1943 for (int i = 0; i < size; i++) { 1944 result[i] = mVolumes.get(i); 1945 } 1946 return result; 1947 } 1948 } 1949 1950 private void addObbStateLocked(ObbState obbState) throws RemoteException { 1951 final IBinder binder = obbState.getBinder(); 1952 List<ObbState> obbStates = mObbMounts.get(binder); 1953 1954 if (obbStates == null) { 1955 obbStates = new ArrayList<ObbState>(); 1956 mObbMounts.put(binder, obbStates); 1957 } else { 1958 for (final ObbState o : obbStates) { 1959 if (o.filename.equals(obbState.filename)) { 1960 throw new IllegalStateException("Attempt to add ObbState twice. " 1961 + "This indicates an error in the MountService logic."); 1962 } 1963 } 1964 } 1965 1966 obbStates.add(obbState); 1967 try { 1968 obbState.link(); 1969 } catch (RemoteException e) { 1970 /* 1971 * The binder died before we could link it, so clean up our state 1972 * and return failure. 1973 */ 1974 obbStates.remove(obbState); 1975 if (obbStates.isEmpty()) { 1976 mObbMounts.remove(binder); 1977 } 1978 1979 // Rethrow the error so mountObb can get it 1980 throw e; 1981 } 1982 1983 mObbPathToStateMap.put(obbState.filename, obbState); 1984 } 1985 1986 private void removeObbStateLocked(ObbState obbState) { 1987 final IBinder binder = obbState.getBinder(); 1988 final List<ObbState> obbStates = mObbMounts.get(binder); 1989 if (obbStates != null) { 1990 if (obbStates.remove(obbState)) { 1991 obbState.unlink(); 1992 } 1993 if (obbStates.isEmpty()) { 1994 mObbMounts.remove(binder); 1995 } 1996 } 1997 1998 mObbPathToStateMap.remove(obbState.filename); 1999 } 2000 2001 private class ObbActionHandler extends Handler { 2002 private boolean mBound = false; 2003 private final List<ObbAction> mActions = new LinkedList<ObbAction>(); 2004 2005 ObbActionHandler(Looper l) { 2006 super(l); 2007 } 2008 2009 @Override 2010 public void handleMessage(Message msg) { 2011 switch (msg.what) { 2012 case OBB_RUN_ACTION: { 2013 final ObbAction action = (ObbAction) msg.obj; 2014 2015 if (DEBUG_OBB) 2016 Slog.i(TAG, "OBB_RUN_ACTION: " + action.toString()); 2017 2018 // If a bind was already initiated we don't really 2019 // need to do anything. The pending install 2020 // will be processed later on. 2021 if (!mBound) { 2022 // If this is the only one pending we might 2023 // have to bind to the service again. 2024 if (!connectToService()) { 2025 Slog.e(TAG, "Failed to bind to media container service"); 2026 action.handleError(); 2027 return; 2028 } 2029 } 2030 2031 mActions.add(action); 2032 break; 2033 } 2034 case OBB_MCS_BOUND: { 2035 if (DEBUG_OBB) 2036 Slog.i(TAG, "OBB_MCS_BOUND"); 2037 if (msg.obj != null) { 2038 mContainerService = (IMediaContainerService) msg.obj; 2039 } 2040 if (mContainerService == null) { 2041 // Something seriously wrong. Bail out 2042 Slog.e(TAG, "Cannot bind to media container service"); 2043 for (ObbAction action : mActions) { 2044 // Indicate service bind error 2045 action.handleError(); 2046 } 2047 mActions.clear(); 2048 } else if (mActions.size() > 0) { 2049 final ObbAction action = mActions.get(0); 2050 if (action != null) { 2051 action.execute(this); 2052 } 2053 } else { 2054 // Should never happen ideally. 2055 Slog.w(TAG, "Empty queue"); 2056 } 2057 break; 2058 } 2059 case OBB_MCS_RECONNECT: { 2060 if (DEBUG_OBB) 2061 Slog.i(TAG, "OBB_MCS_RECONNECT"); 2062 if (mActions.size() > 0) { 2063 if (mBound) { 2064 disconnectService(); 2065 } 2066 if (!connectToService()) { 2067 Slog.e(TAG, "Failed to bind to media container service"); 2068 for (ObbAction action : mActions) { 2069 // Indicate service bind error 2070 action.handleError(); 2071 } 2072 mActions.clear(); 2073 } 2074 } 2075 break; 2076 } 2077 case OBB_MCS_UNBIND: { 2078 if (DEBUG_OBB) 2079 Slog.i(TAG, "OBB_MCS_UNBIND"); 2080 2081 // Delete pending install 2082 if (mActions.size() > 0) { 2083 mActions.remove(0); 2084 } 2085 if (mActions.size() == 0) { 2086 if (mBound) { 2087 disconnectService(); 2088 } 2089 } else { 2090 // There are more pending requests in queue. 2091 // Just post MCS_BOUND message to trigger processing 2092 // of next pending install. 2093 mObbActionHandler.sendEmptyMessage(OBB_MCS_BOUND); 2094 } 2095 break; 2096 } 2097 case OBB_FLUSH_MOUNT_STATE: { 2098 final String path = (String) msg.obj; 2099 2100 if (DEBUG_OBB) 2101 Slog.i(TAG, "Flushing all OBB state for path " + path); 2102 2103 synchronized (mObbMounts) { 2104 final List<ObbState> obbStatesToRemove = new LinkedList<ObbState>(); 2105 2106 final Iterator<Entry<String, ObbState>> i = 2107 mObbPathToStateMap.entrySet().iterator(); 2108 while (i.hasNext()) { 2109 final Entry<String, ObbState> obbEntry = i.next(); 2110 2111 /* 2112 * If this entry's source file is in the volume path 2113 * that got unmounted, remove it because it's no 2114 * longer valid. 2115 */ 2116 if (obbEntry.getKey().startsWith(path)) { 2117 obbStatesToRemove.add(obbEntry.getValue()); 2118 } 2119 } 2120 2121 for (final ObbState obbState : obbStatesToRemove) { 2122 if (DEBUG_OBB) 2123 Slog.i(TAG, "Removing state for " + obbState.filename); 2124 2125 removeObbStateLocked(obbState); 2126 2127 try { 2128 obbState.token.onObbResult(obbState.filename, obbState.nonce, 2129 OnObbStateChangeListener.UNMOUNTED); 2130 } catch (RemoteException e) { 2131 Slog.i(TAG, "Couldn't send unmount notification for OBB: " 2132 + obbState.filename); 2133 } 2134 } 2135 } 2136 break; 2137 } 2138 } 2139 } 2140 2141 private boolean connectToService() { 2142 if (DEBUG_OBB) 2143 Slog.i(TAG, "Trying to bind to DefaultContainerService"); 2144 2145 Intent service = new Intent().setComponent(DEFAULT_CONTAINER_COMPONENT); 2146 if (mContext.bindService(service, mDefContainerConn, Context.BIND_AUTO_CREATE)) { 2147 mBound = true; 2148 return true; 2149 } 2150 return false; 2151 } 2152 2153 private void disconnectService() { 2154 mContainerService = null; 2155 mBound = false; 2156 mContext.unbindService(mDefContainerConn); 2157 } 2158 } 2159 2160 abstract class ObbAction { 2161 private static final int MAX_RETRIES = 3; 2162 private int mRetries; 2163 2164 ObbState mObbState; 2165 2166 ObbAction(ObbState obbState) { 2167 mObbState = obbState; 2168 } 2169 2170 public void execute(ObbActionHandler handler) { 2171 try { 2172 if (DEBUG_OBB) 2173 Slog.i(TAG, "Starting to execute action: " + toString()); 2174 mRetries++; 2175 if (mRetries > MAX_RETRIES) { 2176 Slog.w(TAG, "Failed to invoke remote methods on default container service. Giving up"); 2177 mObbActionHandler.sendEmptyMessage(OBB_MCS_UNBIND); 2178 handleError(); 2179 return; 2180 } else { 2181 handleExecute(); 2182 if (DEBUG_OBB) 2183 Slog.i(TAG, "Posting install MCS_UNBIND"); 2184 mObbActionHandler.sendEmptyMessage(OBB_MCS_UNBIND); 2185 } 2186 } catch (RemoteException e) { 2187 if (DEBUG_OBB) 2188 Slog.i(TAG, "Posting install MCS_RECONNECT"); 2189 mObbActionHandler.sendEmptyMessage(OBB_MCS_RECONNECT); 2190 } catch (Exception e) { 2191 if (DEBUG_OBB) 2192 Slog.d(TAG, "Error handling OBB action", e); 2193 handleError(); 2194 mObbActionHandler.sendEmptyMessage(OBB_MCS_UNBIND); 2195 } 2196 } 2197 2198 abstract void handleExecute() throws RemoteException, IOException; 2199 abstract void handleError(); 2200 2201 protected ObbInfo getObbInfo() throws IOException { 2202 ObbInfo obbInfo; 2203 try { 2204 obbInfo = mContainerService.getObbInfo(mObbState.filename); 2205 } catch (RemoteException e) { 2206 Slog.d(TAG, "Couldn't call DefaultContainerService to fetch OBB info for " 2207 + mObbState.filename); 2208 obbInfo = null; 2209 } 2210 if (obbInfo == null) { 2211 throw new IOException("Couldn't read OBB file: " + mObbState.filename); 2212 } 2213 return obbInfo; 2214 } 2215 2216 protected void sendNewStatusOrIgnore(int status) { 2217 if (mObbState == null || mObbState.token == null) { 2218 return; 2219 } 2220 2221 try { 2222 mObbState.token.onObbResult(mObbState.filename, mObbState.nonce, status); 2223 } catch (RemoteException e) { 2224 Slog.w(TAG, "MountServiceListener went away while calling onObbStateChanged"); 2225 } 2226 } 2227 } 2228 2229 class MountObbAction extends ObbAction { 2230 private final String mKey; 2231 2232 MountObbAction(ObbState obbState, String key) { 2233 super(obbState); 2234 mKey = key; 2235 } 2236 2237 @Override 2238 public void handleExecute() throws IOException, RemoteException { 2239 waitForReady(); 2240 warnOnNotMounted(); 2241 2242 final ObbInfo obbInfo = getObbInfo(); 2243 2244 if (!isUidOwnerOfPackageOrSystem(obbInfo.packageName, mObbState.callerUid)) { 2245 Slog.w(TAG, "Denied attempt to mount OBB " + obbInfo.filename 2246 + " which is owned by " + obbInfo.packageName); 2247 sendNewStatusOrIgnore(OnObbStateChangeListener.ERROR_PERMISSION_DENIED); 2248 return; 2249 } 2250 2251 final boolean isMounted; 2252 synchronized (mObbMounts) { 2253 isMounted = mObbPathToStateMap.containsKey(obbInfo.filename); 2254 } 2255 if (isMounted) { 2256 Slog.w(TAG, "Attempt to mount OBB which is already mounted: " + obbInfo.filename); 2257 sendNewStatusOrIgnore(OnObbStateChangeListener.ERROR_ALREADY_MOUNTED); 2258 return; 2259 } 2260 2261 /* 2262 * The filename passed in might not be the canonical name, so just 2263 * set the filename to the canonicalized version. 2264 */ 2265 mObbState.filename = obbInfo.filename; 2266 2267 final String hashedKey; 2268 if (mKey == null) { 2269 hashedKey = "none"; 2270 } else { 2271 try { 2272 SecretKeyFactory factory = SecretKeyFactory.getInstance("PBKDF2WithHmacSHA1"); 2273 2274 KeySpec ks = new PBEKeySpec(mKey.toCharArray(), obbInfo.salt, 2275 PBKDF2_HASH_ROUNDS, CRYPTO_ALGORITHM_KEY_SIZE); 2276 SecretKey key = factory.generateSecret(ks); 2277 BigInteger bi = new BigInteger(key.getEncoded()); 2278 hashedKey = bi.toString(16); 2279 } catch (NoSuchAlgorithmException e) { 2280 Slog.e(TAG, "Could not load PBKDF2 algorithm", e); 2281 sendNewStatusOrIgnore(OnObbStateChangeListener.ERROR_INTERNAL); 2282 return; 2283 } catch (InvalidKeySpecException e) { 2284 Slog.e(TAG, "Invalid key spec when loading PBKDF2 algorithm", e); 2285 sendNewStatusOrIgnore(OnObbStateChangeListener.ERROR_INTERNAL); 2286 return; 2287 } 2288 } 2289 2290 int rc = StorageResultCode.OperationSucceeded; 2291 try { 2292 mConnector.execute( 2293 "obb", "mount", mObbState.filename, hashedKey, mObbState.callerUid); 2294 } catch (NativeDaemonConnectorException e) { 2295 int code = e.getCode(); 2296 if (code != VoldResponseCode.OpFailedStorageBusy) { 2297 rc = StorageResultCode.OperationFailedInternalError; 2298 } 2299 } 2300 2301 if (rc == StorageResultCode.OperationSucceeded) { 2302 if (DEBUG_OBB) 2303 Slog.d(TAG, "Successfully mounted OBB " + mObbState.filename); 2304 2305 synchronized (mObbMounts) { 2306 addObbStateLocked(mObbState); 2307 } 2308 2309 sendNewStatusOrIgnore(OnObbStateChangeListener.MOUNTED); 2310 } else { 2311 Slog.e(TAG, "Couldn't mount OBB file: " + rc); 2312 2313 sendNewStatusOrIgnore(OnObbStateChangeListener.ERROR_COULD_NOT_MOUNT); 2314 } 2315 } 2316 2317 @Override 2318 public void handleError() { 2319 sendNewStatusOrIgnore(OnObbStateChangeListener.ERROR_INTERNAL); 2320 } 2321 2322 @Override 2323 public String toString() { 2324 StringBuilder sb = new StringBuilder(); 2325 sb.append("MountObbAction{"); 2326 sb.append("filename="); 2327 sb.append(mObbState.filename); 2328 sb.append(",callerUid="); 2329 sb.append(mObbState.callerUid); 2330 sb.append(",token="); 2331 sb.append(mObbState.token != null ? mObbState.token.toString() : "NULL"); 2332 sb.append(",binder="); 2333 sb.append(mObbState.token != null ? mObbState.getBinder().toString() : "null"); 2334 sb.append('}'); 2335 return sb.toString(); 2336 } 2337 } 2338 2339 class UnmountObbAction extends ObbAction { 2340 private final boolean mForceUnmount; 2341 2342 UnmountObbAction(ObbState obbState, boolean force) { 2343 super(obbState); 2344 mForceUnmount = force; 2345 } 2346 2347 @Override 2348 public void handleExecute() throws IOException { 2349 waitForReady(); 2350 warnOnNotMounted(); 2351 2352 final ObbInfo obbInfo = getObbInfo(); 2353 2354 final ObbState obbState; 2355 synchronized (mObbMounts) { 2356 obbState = mObbPathToStateMap.get(obbInfo.filename); 2357 } 2358 2359 if (obbState == null) { 2360 sendNewStatusOrIgnore(OnObbStateChangeListener.ERROR_NOT_MOUNTED); 2361 return; 2362 } 2363 2364 if (obbState.callerUid != mObbState.callerUid) { 2365 Slog.w(TAG, "Permission denied attempting to unmount OBB " + obbInfo.filename 2366 + " (owned by " + obbInfo.packageName + ")"); 2367 sendNewStatusOrIgnore(OnObbStateChangeListener.ERROR_PERMISSION_DENIED); 2368 return; 2369 } 2370 2371 mObbState.filename = obbInfo.filename; 2372 2373 int rc = StorageResultCode.OperationSucceeded; 2374 try { 2375 final Command cmd = new Command("obb", "unmount", mObbState.filename); 2376 if (mForceUnmount) { 2377 cmd.appendArg("force"); 2378 } 2379 mConnector.execute(cmd); 2380 } catch (NativeDaemonConnectorException e) { 2381 int code = e.getCode(); 2382 if (code == VoldResponseCode.OpFailedStorageBusy) { 2383 rc = StorageResultCode.OperationFailedStorageBusy; 2384 } else if (code == VoldResponseCode.OpFailedStorageNotFound) { 2385 // If it's not mounted then we've already won. 2386 rc = StorageResultCode.OperationSucceeded; 2387 } else { 2388 rc = StorageResultCode.OperationFailedInternalError; 2389 } 2390 } 2391 2392 if (rc == StorageResultCode.OperationSucceeded) { 2393 synchronized (mObbMounts) { 2394 removeObbStateLocked(obbState); 2395 } 2396 2397 sendNewStatusOrIgnore(OnObbStateChangeListener.UNMOUNTED); 2398 } else { 2399 Slog.w(TAG, "Could not mount OBB: " + mObbState.filename); 2400 sendNewStatusOrIgnore(OnObbStateChangeListener.ERROR_COULD_NOT_UNMOUNT); 2401 } 2402 } 2403 2404 @Override 2405 public void handleError() { 2406 sendNewStatusOrIgnore(OnObbStateChangeListener.ERROR_INTERNAL); 2407 } 2408 2409 @Override 2410 public String toString() { 2411 StringBuilder sb = new StringBuilder(); 2412 sb.append("UnmountObbAction{"); 2413 sb.append("filename="); 2414 sb.append(mObbState.filename != null ? mObbState.filename : "null"); 2415 sb.append(",force="); 2416 sb.append(mForceUnmount); 2417 sb.append(",callerUid="); 2418 sb.append(mObbState.callerUid); 2419 sb.append(",token="); 2420 sb.append(mObbState.token != null ? mObbState.token.toString() : "null"); 2421 sb.append(",binder="); 2422 sb.append(mObbState.token != null ? mObbState.getBinder().toString() : "null"); 2423 sb.append('}'); 2424 return sb.toString(); 2425 } 2426 } 2427 2428 @Override 2429 protected void dump(FileDescriptor fd, PrintWriter pw, String[] args) { 2430 if (mContext.checkCallingOrSelfPermission(android.Manifest.permission.DUMP) != PackageManager.PERMISSION_GRANTED) { 2431 pw.println("Permission Denial: can't dump ActivityManager from from pid=" 2432 + Binder.getCallingPid() + ", uid=" + Binder.getCallingUid() 2433 + " without permission " + android.Manifest.permission.DUMP); 2434 return; 2435 } 2436 2437 synchronized (mObbMounts) { 2438 pw.println(" mObbMounts:"); 2439 2440 final Iterator<Entry<IBinder, List<ObbState>>> binders = mObbMounts.entrySet().iterator(); 2441 while (binders.hasNext()) { 2442 Entry<IBinder, List<ObbState>> e = binders.next(); 2443 pw.print(" Key="); pw.println(e.getKey().toString()); 2444 final List<ObbState> obbStates = e.getValue(); 2445 for (final ObbState obbState : obbStates) { 2446 pw.print(" "); pw.println(obbState.toString()); 2447 } 2448 } 2449 2450 pw.println(""); 2451 pw.println(" mObbPathToStateMap:"); 2452 final Iterator<Entry<String, ObbState>> maps = mObbPathToStateMap.entrySet().iterator(); 2453 while (maps.hasNext()) { 2454 final Entry<String, ObbState> e = maps.next(); 2455 pw.print(" "); pw.print(e.getKey()); 2456 pw.print(" -> "); pw.println(e.getValue().toString()); 2457 } 2458 } 2459 2460 pw.println(""); 2461 2462 synchronized (mVolumes) { 2463 pw.println(" mVolumes:"); 2464 2465 final int N = mVolumes.size(); 2466 for (int i = 0; i < N; i++) { 2467 final StorageVolume v = mVolumes.get(i); 2468 pw.print(" "); 2469 pw.println(v.toString()); 2470 } 2471 } 2472 2473 pw.println(); 2474 pw.println(" mConnection:"); 2475 mConnector.dump(fd, pw, args); 2476 } 2477 2478 /** {@inheritDoc} */ 2479 public void monitor() { 2480 if (mConnector != null) { 2481 mConnector.monitor(); 2482 } 2483 } 2484} 2485