MountService.java revision 9b10ef5fe85e9d29721ff0cd15161f960d38a8db
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.server.am.ActivityManagerService; 20 21import android.content.BroadcastReceiver; 22import android.content.Context; 23import android.content.Intent; 24import android.content.IntentFilter; 25import android.content.pm.PackageManager; 26import android.net.Uri; 27import android.os.storage.IMountService; 28import android.os.storage.IMountServiceListener; 29import android.os.storage.StorageResultCode; 30import android.os.Handler; 31import android.os.Message; 32import android.os.RemoteException; 33import android.os.IBinder; 34import android.os.Environment; 35import android.os.ServiceManager; 36import android.os.SystemClock; 37import android.os.SystemProperties; 38import android.util.Log; 39import java.util.ArrayList; 40import java.util.HashSet; 41 42/** 43 * MountService implements back-end services for platform storage 44 * management. 45 * @hide - Applications should use android.os.storage.StorageManager 46 * to access the MountService. 47 */ 48class MountService extends IMountService.Stub 49 implements INativeDaemonConnectorCallbacks { 50 private static final boolean LOCAL_LOGD = false; 51 52 private static final String TAG = "MountService"; 53 54 /* 55 * Internal vold volume state constants 56 */ 57 class VolumeState { 58 public static final int Init = -1; 59 public static final int NoMedia = 0; 60 public static final int Idle = 1; 61 public static final int Pending = 2; 62 public static final int Checking = 3; 63 public static final int Mounted = 4; 64 public static final int Unmounting = 5; 65 public static final int Formatting = 6; 66 public static final int Shared = 7; 67 public static final int SharedMnt = 8; 68 } 69 70 /* 71 * Internal vold response code constants 72 */ 73 class VoldResponseCode { 74 /* 75 * 100 series - Requestion action was initiated; expect another reply 76 * before proceeding with a new command. 77 */ 78 public static final int VolumeListResult = 110; 79 public static final int AsecListResult = 111; 80 public static final int StorageUsersListResult = 112; 81 82 /* 83 * 200 series - Requestion action has been successfully completed. 84 */ 85 public static final int ShareStatusResult = 210; 86 public static final int AsecPathResult = 211; 87 public static final int ShareEnabledResult = 212; 88 89 /* 90 * 400 series - Command was accepted, but the requested action 91 * did not take place. 92 */ 93 public static final int OpFailedNoMedia = 401; 94 public static final int OpFailedMediaBlank = 402; 95 public static final int OpFailedMediaCorrupt = 403; 96 public static final int OpFailedVolNotMounted = 404; 97 public static final int OpFailedStorageBusy = 405; 98 99 /* 100 * 600 series - Unsolicited broadcasts. 101 */ 102 public static final int VolumeStateChange = 605; 103 public static final int ShareAvailabilityChange = 620; 104 public static final int VolumeDiskInserted = 630; 105 public static final int VolumeDiskRemoved = 631; 106 public static final int VolumeBadRemoval = 632; 107 } 108 109 private Context mContext; 110 private NativeDaemonConnector mConnector; 111 private String mLegacyState = Environment.MEDIA_REMOVED; 112 private PackageManagerService mPms; 113 private boolean mUmsEnabling; 114 // Used as a lock for methods that register/unregister listeners. 115 final private ArrayList<MountServiceBinderListener> mListeners = 116 new ArrayList<MountServiceBinderListener>(); 117 private boolean mBooted = false; 118 private boolean mReady = false; 119 private boolean mSendUmsConnectedOnBoot = false; 120 121 /** 122 * Private hash of currently mounted secure containers. 123 * Used as a lock in methods to manipulate secure containers. 124 */ 125 final private HashSet<String> mAsecMountSet = new HashSet<String>(); 126 127 private static final int H_UNMOUNT_PM_UPDATE = 1; 128 private static final int H_UNMOUNT_PM_DONE = 2; 129 private static final int H_UNMOUNT_MS = 3; 130 private static final int RETRY_UNMOUNT_DELAY = 30; // in ms 131 private static final int MAX_UNMOUNT_RETRIES = 4; 132 133 private IntentFilter mPmFilter = new IntentFilter( 134 Intent.ACTION_EXTERNAL_APPLICATIONS_UNAVAILABLE); 135 private BroadcastReceiver mPmReceiver = new BroadcastReceiver() { 136 public void onReceive(Context context, Intent intent) { 137 String action = intent.getAction(); 138 if (Intent.ACTION_EXTERNAL_APPLICATIONS_UNAVAILABLE.equals(action)) { 139 mHandler.sendEmptyMessage(H_UNMOUNT_PM_DONE); 140 } 141 } 142 }; 143 144 class UnmountCallBack { 145 String path; 146 int retries; 147 boolean force; 148 149 UnmountCallBack(String path, boolean force) { 150 retries = 0; 151 this.path = path; 152 this.force = force; 153 } 154 155 void handleFinished() { 156 doUnmountVolume(path, true); 157 } 158 } 159 160 class UmsEnableCallBack extends UnmountCallBack { 161 String method; 162 163 UmsEnableCallBack(String path, String method, boolean force) { 164 super(path, force); 165 this.method = method; 166 } 167 168 @Override 169 void handleFinished() { 170 super.handleFinished(); 171 doShareUnshareVolume(path, method, true); 172 } 173 } 174 175 final private Handler mHandler = new Handler() { 176 ArrayList<UnmountCallBack> mForceUnmounts = new ArrayList<UnmountCallBack>(); 177 178 public void handleMessage(Message msg) { 179 switch (msg.what) { 180 case H_UNMOUNT_PM_UPDATE: { 181 UnmountCallBack ucb = (UnmountCallBack) msg.obj; 182 mForceUnmounts.add(ucb); 183 mContext.registerReceiver(mPmReceiver, mPmFilter); 184 boolean hasExtPkgs = mPms.updateExternalMediaStatus(false); 185 if (!hasExtPkgs) { 186 // Unregister right away 187 mHandler.sendEmptyMessage(H_UNMOUNT_PM_DONE); 188 } 189 break; 190 } 191 case H_UNMOUNT_PM_DONE: { 192 // Unregister receiver 193 mContext.unregisterReceiver(mPmReceiver); 194 UnmountCallBack ucb = mForceUnmounts.get(0); 195 if (ucb == null || ucb.path == null) { 196 // Just ignore 197 return; 198 } 199 String path = ucb.path; 200 boolean done = false; 201 if (!ucb.force) { 202 done = true; 203 } else { 204 int pids[] = getStorageUsers(path); 205 if (pids == null || pids.length == 0) { 206 done = true; 207 } else { 208 // Kill processes holding references first 209 ActivityManagerService ams = (ActivityManagerService) 210 ServiceManager.getService("activity"); 211 // Eliminate system process here? 212 boolean ret = ams.killPidsForMemory(pids); 213 if (ret) { 214 // Confirm if file references have been freed. 215 pids = getStorageUsers(path); 216 if (pids == null || pids.length == 0) { 217 done = true; 218 } 219 } 220 } 221 } 222 if (done) { 223 mForceUnmounts.remove(0); 224 mHandler.sendMessage(mHandler.obtainMessage(H_UNMOUNT_MS, 225 ucb)); 226 } else { 227 if (ucb.retries >= MAX_UNMOUNT_RETRIES) { 228 Log.i(TAG, "Cannot unmount inspite of " + 229 MAX_UNMOUNT_RETRIES + " to unmount media"); 230 // Send final broadcast indicating failure to unmount. 231 } else { 232 mHandler.sendMessageDelayed( 233 mHandler.obtainMessage(H_UNMOUNT_PM_DONE, 234 ucb.retries++), 235 RETRY_UNMOUNT_DELAY); 236 } 237 } 238 break; 239 } 240 case H_UNMOUNT_MS : { 241 UnmountCallBack ucb = (UnmountCallBack) msg.obj; 242 ucb.handleFinished(); 243 break; 244 } 245 } 246 } 247 }; 248 249 private void waitForReady() { 250 while (mReady == false) { 251 for (int retries = 5; retries > 0; retries--) { 252 if (mReady) { 253 return; 254 } 255 SystemClock.sleep(1000); 256 } 257 Log.w(TAG, "Waiting too long for mReady!"); 258 } 259 } 260 261 private BroadcastReceiver mBroadcastReceiver = new BroadcastReceiver() { 262 public void onReceive(Context context, Intent intent) { 263 String action = intent.getAction(); 264 265 if (action.equals(Intent.ACTION_BOOT_COMPLETED)) { 266 mBooted = true; 267 268 /* 269 * In the simulator, we need to broadcast a volume mounted event 270 * to make the media scanner run. 271 */ 272 if ("simulator".equals(SystemProperties.get("ro.product.device"))) { 273 notifyVolumeStateChange(null, "/sdcard", VolumeState.NoMedia, VolumeState.Mounted); 274 return; 275 } 276 new Thread() { 277 public void run() { 278 try { 279 String path = Environment.getExternalStorageDirectory().getPath(); 280 if (getVolumeState( 281 Environment.getExternalStorageDirectory().getPath()).equals( 282 Environment.MEDIA_UNMOUNTED)) { 283 int rc = doMountVolume(path); 284 if (rc != StorageResultCode.OperationSucceeded) { 285 Log.e(TAG, String.format("Boot-time mount failed (%d)", rc)); 286 } 287 } 288 /* 289 * If UMS is connected in boot, send the connected event 290 * now that we're up. 291 */ 292 if (mSendUmsConnectedOnBoot) { 293 sendUmsIntent(true); 294 mSendUmsConnectedOnBoot = false; 295 } 296 } catch (Exception ex) { 297 Log.e(TAG, "Boot-time mount exception", ex); 298 } 299 } 300 }.start(); 301 } 302 } 303 }; 304 305 private final class MountServiceBinderListener implements IBinder.DeathRecipient { 306 final IMountServiceListener mListener; 307 308 MountServiceBinderListener(IMountServiceListener listener) { 309 mListener = listener; 310 311 } 312 313 public void binderDied() { 314 if (LOCAL_LOGD) Log.d(TAG, "An IMountServiceListener has died!"); 315 synchronized(mListeners) { 316 mListeners.remove(this); 317 mListener.asBinder().unlinkToDeath(this, 0); 318 } 319 } 320 } 321 322 private void doShareUnshareVolume(String path, String method, boolean enable) { 323 // TODO: Add support for multiple share methods 324 if (!method.equals("ums")) { 325 throw new IllegalArgumentException(String.format("Method %s not supported", method)); 326 } 327 328 try { 329 mConnector.doCommand(String.format( 330 "volume %sshare %s %s", (enable ? "" : "un"), path, method)); 331 } catch (NativeDaemonConnectorException e) { 332 Log.e(TAG, "Failed to share/unshare", e); 333 } 334 } 335 336 private void updatePublicVolumeState(String path, String state) { 337 if (!path.equals(Environment.getExternalStorageDirectory().getPath())) { 338 Log.w(TAG, "Multiple volumes not currently supported"); 339 return; 340 } 341 342 if (mLegacyState.equals(state)) { 343 Log.w(TAG, String.format("Duplicate state transition (%s -> %s)", mLegacyState, state)); 344 return; 345 } 346 347 String oldState = mLegacyState; 348 mLegacyState = state; 349 350 synchronized (mListeners) { 351 for (int i = mListeners.size() -1; i >= 0; i--) { 352 MountServiceBinderListener bl = mListeners.get(i); 353 try { 354 bl.mListener.onStorageStateChanged(path, oldState, state); 355 } catch (RemoteException rex) { 356 Log.e(TAG, "Listener dead"); 357 mListeners.remove(i); 358 } catch (Exception ex) { 359 Log.e(TAG, "Listener failed", ex); 360 } 361 } 362 } 363 } 364 365 /** 366 * 367 * Callback from NativeDaemonConnector 368 */ 369 public void onDaemonConnected() { 370 /* 371 * Since we'll be calling back into the NativeDaemonConnector, 372 * we need to do our work in a new thread. 373 */ 374 new Thread() { 375 public void run() { 376 /** 377 * Determine media state and UMS detection status 378 */ 379 String path = Environment.getExternalStorageDirectory().getPath(); 380 String state = Environment.MEDIA_REMOVED; 381 382 try { 383 String[] vols = mConnector.doListCommand( 384 "volume list", VoldResponseCode.VolumeListResult); 385 for (String volstr : vols) { 386 String[] tok = volstr.split(" "); 387 // FMT: <label> <mountpoint> <state> 388 if (!tok[1].equals(path)) { 389 Log.w(TAG, String.format( 390 "Skipping unknown volume '%s'",tok[1])); 391 continue; 392 } 393 int st = Integer.parseInt(tok[2]); 394 if (st == VolumeState.NoMedia) { 395 state = Environment.MEDIA_REMOVED; 396 } else if (st == VolumeState.Idle) { 397 state = Environment.MEDIA_UNMOUNTED; 398 } else if (st == VolumeState.Mounted) { 399 state = Environment.MEDIA_MOUNTED; 400 Log.i(TAG, "Media already mounted on daemon connection"); 401 } else if (st == VolumeState.Shared) { 402 state = Environment.MEDIA_SHARED; 403 Log.i(TAG, "Media shared on daemon connection"); 404 } else { 405 throw new Exception(String.format("Unexpected state %d", st)); 406 } 407 } 408 if (state != null) { 409 updatePublicVolumeState(path, state); 410 } 411 } catch (Exception e) { 412 Log.e(TAG, "Error processing initial volume state", e); 413 updatePublicVolumeState(path, Environment.MEDIA_REMOVED); 414 } 415 416 try { 417 boolean avail = doGetShareMethodAvailable("ums"); 418 notifyShareAvailabilityChange("ums", avail); 419 } catch (Exception ex) { 420 Log.w(TAG, "Failed to get share availability"); 421 } 422 /* 423 * Now that we've done our initialization, release 424 * the hounds! 425 */ 426 mReady = true; 427 } 428 }.start(); 429 } 430 431 /** 432 * Callback from NativeDaemonConnector 433 */ 434 public boolean onEvent(int code, String raw, String[] cooked) { 435 Intent in = null; 436 437 if (code == VoldResponseCode.VolumeStateChange) { 438 /* 439 * One of the volumes we're managing has changed state. 440 * Format: "NNN Volume <label> <path> state changed 441 * from <old_#> (<old_str>) to <new_#> (<new_str>)" 442 */ 443 notifyVolumeStateChange( 444 cooked[2], cooked[3], Integer.parseInt(cooked[7]), 445 Integer.parseInt(cooked[10])); 446 } else if (code == VoldResponseCode.ShareAvailabilityChange) { 447 // FMT: NNN Share method <method> now <available|unavailable> 448 boolean avail = false; 449 if (cooked[5].equals("available")) { 450 avail = true; 451 } 452 notifyShareAvailabilityChange(cooked[3], avail); 453 } else if ((code == VoldResponseCode.VolumeDiskInserted) || 454 (code == VoldResponseCode.VolumeDiskRemoved) || 455 (code == VoldResponseCode.VolumeBadRemoval)) { 456 // FMT: NNN Volume <label> <mountpoint> disk inserted (<major>:<minor>) 457 // FMT: NNN Volume <label> <mountpoint> disk removed (<major>:<minor>) 458 // FMT: NNN Volume <label> <mountpoint> bad removal (<major>:<minor>) 459 final String label = cooked[2]; 460 final String path = cooked[3]; 461 int major = -1; 462 int minor = -1; 463 464 try { 465 String devComp = cooked[6].substring(1, cooked[6].length() -1); 466 String[] devTok = devComp.split(":"); 467 major = Integer.parseInt(devTok[0]); 468 minor = Integer.parseInt(devTok[1]); 469 } catch (Exception ex) { 470 Log.e(TAG, "Failed to parse major/minor", ex); 471 } 472 473 if (code == VoldResponseCode.VolumeDiskInserted) { 474 new Thread() { 475 public void run() { 476 try { 477 int rc; 478 if ((rc = doMountVolume(path)) != StorageResultCode.OperationSucceeded) { 479 Log.w(TAG, String.format("Insertion mount failed (%d)", rc)); 480 } 481 } catch (Exception ex) { 482 Log.w(TAG, "Failed to mount media on insertion", ex); 483 } 484 } 485 }.start(); 486 } else if (code == VoldResponseCode.VolumeDiskRemoved) { 487 /* 488 * This event gets trumped if we're already in BAD_REMOVAL state 489 */ 490 if (getVolumeState(path).equals(Environment.MEDIA_BAD_REMOVAL)) { 491 return true; 492 } 493 /* Send the media unmounted event first */ 494 updatePublicVolumeState(path, Environment.MEDIA_UNMOUNTED); 495 in = new Intent(Intent.ACTION_MEDIA_UNMOUNTED, Uri.parse("file://" + path)); 496 mContext.sendBroadcast(in); 497 498 updatePublicVolumeState(path, Environment.MEDIA_REMOVED); 499 in = new Intent(Intent.ACTION_MEDIA_REMOVED, Uri.parse("file://" + path)); 500 } else if (code == VoldResponseCode.VolumeBadRemoval) { 501 /* Send the media unmounted event first */ 502 updatePublicVolumeState(path, Environment.MEDIA_UNMOUNTED); 503 in = new Intent(Intent.ACTION_MEDIA_UNMOUNTED, Uri.parse("file://" + path)); 504 mContext.sendBroadcast(in); 505 506 updatePublicVolumeState(path, Environment.MEDIA_BAD_REMOVAL); 507 in = new Intent(Intent.ACTION_MEDIA_BAD_REMOVAL, Uri.parse("file://" + path)); 508 } else { 509 Log.e(TAG, String.format("Unknown code {%d}", code)); 510 } 511 } else { 512 return false; 513 } 514 515 if (in != null) { 516 mContext.sendBroadcast(in); 517 } 518 return true; 519 } 520 521 private void notifyVolumeStateChange(String label, String path, int oldState, int newState) { 522 String vs = getVolumeState(path); 523 524 Intent in = null; 525 526 if (oldState == VolumeState.Shared && newState != oldState) { 527 mContext.sendBroadcast(new Intent(Intent.ACTION_MEDIA_UNSHARED, 528 Uri.parse("file://" + path))); 529 } 530 531 if (newState == VolumeState.Init) { 532 } else if (newState == VolumeState.NoMedia) { 533 // NoMedia is handled via Disk Remove events 534 } else if (newState == VolumeState.Idle) { 535 /* 536 * Don't notify if we're in BAD_REMOVAL, NOFS, UNMOUNTABLE, or 537 * if we're in the process of enabling UMS 538 */ 539 if (!vs.equals( 540 Environment.MEDIA_BAD_REMOVAL) && !vs.equals( 541 Environment.MEDIA_NOFS) && !vs.equals( 542 Environment.MEDIA_UNMOUNTABLE) && !getUmsEnabling()) { 543 updatePublicVolumeState(path, Environment.MEDIA_UNMOUNTED); 544 in = new Intent(Intent.ACTION_MEDIA_UNMOUNTED, Uri.parse("file://" + path)); 545 } 546 } else if (newState == VolumeState.Pending) { 547 } else if (newState == VolumeState.Checking) { 548 updatePublicVolumeState(path, Environment.MEDIA_CHECKING); 549 in = new Intent(Intent.ACTION_MEDIA_CHECKING, Uri.parse("file://" + path)); 550 } else if (newState == VolumeState.Mounted) { 551 updatePublicVolumeState(path, Environment.MEDIA_MOUNTED); 552 // Update media status on PackageManagerService to mount packages on sdcard 553 mPms.updateExternalMediaStatus(true); 554 in = new Intent(Intent.ACTION_MEDIA_MOUNTED, Uri.parse("file://" + path)); 555 in.putExtra("read-only", false); 556 } else if (newState == VolumeState.Unmounting) { 557 mPms.updateExternalMediaStatus(false); 558 in = new Intent(Intent.ACTION_MEDIA_EJECT, Uri.parse("file://" + path)); 559 } else if (newState == VolumeState.Formatting) { 560 } else if (newState == VolumeState.Shared) { 561 /* Send the media unmounted event first */ 562 updatePublicVolumeState(path, Environment.MEDIA_UNMOUNTED); 563 in = new Intent(Intent.ACTION_MEDIA_UNMOUNTED, Uri.parse("file://" + path)); 564 mContext.sendBroadcast(in); 565 566 updatePublicVolumeState(path, Environment.MEDIA_SHARED); 567 in = new Intent(Intent.ACTION_MEDIA_SHARED, Uri.parse("file://" + path)); 568 } else if (newState == VolumeState.SharedMnt) { 569 Log.e(TAG, "Live shared mounts not supported yet!"); 570 return; 571 } else { 572 Log.e(TAG, "Unhandled VolumeState {" + newState + "}"); 573 } 574 575 if (in != null) { 576 mContext.sendBroadcast(in); 577 } 578 } 579 580 private boolean doGetShareMethodAvailable(String method) { 581 ArrayList<String> rsp = mConnector.doCommand("share status " + method); 582 583 for (String line : rsp) { 584 String []tok = line.split(" "); 585 int code; 586 try { 587 code = Integer.parseInt(tok[0]); 588 } catch (NumberFormatException nfe) { 589 Log.e(TAG, String.format("Error parsing code %s", tok[0])); 590 return false; 591 } 592 if (code == VoldResponseCode.ShareStatusResult) { 593 if (tok[2].equals("available")) 594 return true; 595 return false; 596 } else { 597 Log.e(TAG, String.format("Unexpected response code %d", code)); 598 return false; 599 } 600 } 601 Log.e(TAG, "Got an empty response"); 602 return false; 603 } 604 605 private int doMountVolume(String path) { 606 int rc = StorageResultCode.OperationSucceeded; 607 608 try { 609 mConnector.doCommand(String.format("volume mount %s", path)); 610 } catch (NativeDaemonConnectorException e) { 611 /* 612 * Mount failed for some reason 613 */ 614 Intent in = null; 615 int code = e.getCode(); 616 if (code == VoldResponseCode.OpFailedNoMedia) { 617 /* 618 * Attempt to mount but no media inserted 619 */ 620 rc = StorageResultCode.OperationFailedNoMedia; 621 } else if (code == VoldResponseCode.OpFailedMediaBlank) { 622 /* 623 * Media is blank or does not contain a supported filesystem 624 */ 625 updatePublicVolumeState(path, Environment.MEDIA_NOFS); 626 in = new Intent(Intent.ACTION_MEDIA_NOFS, Uri.parse("file://" + path)); 627 rc = StorageResultCode.OperationFailedMediaBlank; 628 } else if (code == VoldResponseCode.OpFailedMediaCorrupt) { 629 /* 630 * Volume consistency check failed 631 */ 632 updatePublicVolumeState(path, Environment.MEDIA_UNMOUNTABLE); 633 in = new Intent(Intent.ACTION_MEDIA_UNMOUNTABLE, Uri.parse("file://" + path)); 634 rc = StorageResultCode.OperationFailedMediaCorrupt; 635 } else { 636 rc = StorageResultCode.OperationFailedInternalError; 637 } 638 639 /* 640 * Send broadcast intent (if required for the failure) 641 */ 642 if (in != null) { 643 mContext.sendBroadcast(in); 644 } 645 } 646 647 return rc; 648 } 649 650 /* 651 * If force is not set, we do not unmount if there are 652 * processes holding references to the volume about to be unmounted. 653 * If force is set, all the processes holding references need to be 654 * killed via the ActivityManager before actually unmounting the volume. 655 * This might even take a while and might be retried after timed delays 656 * to make sure we dont end up in an instable state and kill some core 657 * processes. 658 */ 659 private int doUnmountVolume(String path, boolean force) { 660 if (!getVolumeState(path).equals(Environment.MEDIA_MOUNTED)) { 661 return VoldResponseCode.OpFailedVolNotMounted; 662 } 663 664 // We unmounted the volume. No of the asec containers are available now. 665 synchronized (mAsecMountSet) { 666 mAsecMountSet.clear(); 667 } 668 // Notify PackageManager of potential media removal and deal with 669 // return code later on. The caller of this api should be aware or have been 670 // notified that the applications installed on the media will be killed. 671 // Redundant probably. But no harm in updating state again. 672 mPms.updateExternalMediaStatus(false); 673 try { 674 mConnector.doCommand(String.format( 675 "volume unmount %s%s", path, (force ? " force" : ""))); 676 return StorageResultCode.OperationSucceeded; 677 } catch (NativeDaemonConnectorException e) { 678 // Don't worry about mismatch in PackageManager since the 679 // call back will handle the status changes any way. 680 int code = e.getCode(); 681 if (code == VoldResponseCode.OpFailedVolNotMounted) { 682 return StorageResultCode.OperationFailedStorageNotMounted; 683 } else if (code == VoldResponseCode.OpFailedStorageBusy) { 684 return StorageResultCode.OperationFailedStorageBusy; 685 } else { 686 return StorageResultCode.OperationFailedInternalError; 687 } 688 } 689 } 690 691 private int doFormatVolume(String path) { 692 try { 693 String cmd = String.format("volume format %s", path); 694 mConnector.doCommand(cmd); 695 return StorageResultCode.OperationSucceeded; 696 } catch (NativeDaemonConnectorException e) { 697 int code = e.getCode(); 698 if (code == VoldResponseCode.OpFailedNoMedia) { 699 return StorageResultCode.OperationFailedNoMedia; 700 } else if (code == VoldResponseCode.OpFailedMediaCorrupt) { 701 return StorageResultCode.OperationFailedMediaCorrupt; 702 } else { 703 return StorageResultCode.OperationFailedInternalError; 704 } 705 } 706 } 707 708 private boolean doGetVolumeShared(String path, String method) { 709 String cmd = String.format("volume shared %s %s", path, method); 710 ArrayList<String> rsp = mConnector.doCommand(cmd); 711 712 for (String line : rsp) { 713 String []tok = line.split(" "); 714 int code; 715 try { 716 code = Integer.parseInt(tok[0]); 717 } catch (NumberFormatException nfe) { 718 Log.e(TAG, String.format("Error parsing code %s", tok[0])); 719 return false; 720 } 721 if (code == VoldResponseCode.ShareEnabledResult) { 722 if (tok[2].equals("enabled")) 723 return true; 724 return false; 725 } else { 726 Log.e(TAG, String.format("Unexpected response code %d", code)); 727 return false; 728 } 729 } 730 Log.e(TAG, "Got an empty response"); 731 return false; 732 } 733 734 private void notifyShareAvailabilityChange(String method, final boolean avail) { 735 if (!method.equals("ums")) { 736 Log.w(TAG, "Ignoring unsupported share method {" + method + "}"); 737 return; 738 } 739 740 synchronized (mListeners) { 741 for (int i = mListeners.size() -1; i >= 0; i--) { 742 MountServiceBinderListener bl = mListeners.get(i); 743 try { 744 bl.mListener.onUsbMassStorageConnectionChanged(avail); 745 } catch (RemoteException rex) { 746 Log.e(TAG, "Listener dead"); 747 mListeners.remove(i); 748 } catch (Exception ex) { 749 Log.e(TAG, "Listener failed", ex); 750 } 751 } 752 } 753 754 if (mBooted == true) { 755 sendUmsIntent(avail); 756 } else { 757 mSendUmsConnectedOnBoot = avail; 758 } 759 } 760 761 private void sendUmsIntent(boolean c) { 762 mContext.sendBroadcast( 763 new Intent((c ? Intent.ACTION_UMS_CONNECTED : Intent.ACTION_UMS_DISCONNECTED))); 764 } 765 766 private void validatePermission(String perm) { 767 if (mContext.checkCallingOrSelfPermission(perm) != PackageManager.PERMISSION_GRANTED) { 768 throw new SecurityException(String.format("Requires %s permission", perm)); 769 } 770 } 771 772 /** 773 * Constructs a new MountService instance 774 * 775 * @param context Binder context for this service 776 */ 777 public MountService(Context context) { 778 mContext = context; 779 780 // XXX: This will go away soon in favor of IMountServiceObserver 781 mPms = (PackageManagerService) ServiceManager.getService("package"); 782 783 mContext.registerReceiver(mBroadcastReceiver, 784 new IntentFilter(Intent.ACTION_BOOT_COMPLETED), null, null); 785 786 /* 787 * Vold does not run in the simulator, so pretend the connector thread 788 * ran and did its thing. 789 */ 790 if ("simulator".equals(SystemProperties.get("ro.product.device"))) { 791 mReady = true; 792 mUmsEnabling = true; 793 return; 794 } 795 796 mConnector = new NativeDaemonConnector(this, "vold", 10, "VoldConnector"); 797 mReady = false; 798 Thread thread = new Thread(mConnector, NativeDaemonConnector.class.getName()); 799 thread.start(); 800 } 801 802 /** 803 * Exposed API calls below here 804 */ 805 806 public void registerListener(IMountServiceListener listener) { 807 synchronized (mListeners) { 808 MountServiceBinderListener bl = new MountServiceBinderListener(listener); 809 try { 810 listener.asBinder().linkToDeath(bl, 0); 811 mListeners.add(bl); 812 } catch (RemoteException rex) { 813 Log.e(TAG, "Failed to link to listener death"); 814 } 815 } 816 } 817 818 public void unregisterListener(IMountServiceListener listener) { 819 synchronized (mListeners) { 820 for(MountServiceBinderListener bl : mListeners) { 821 if (bl.mListener == listener) { 822 mListeners.remove(mListeners.indexOf(bl)); 823 return; 824 } 825 } 826 } 827 } 828 829 public void shutdown() { 830 validatePermission(android.Manifest.permission.SHUTDOWN); 831 832 Log.i(TAG, "Shutting down"); 833 834 String path = Environment.getExternalStorageDirectory().getPath(); 835 String state = getVolumeState(path); 836 837 if (state.equals(Environment.MEDIA_SHARED)) { 838 /* 839 * If the media is currently shared, unshare it. 840 * XXX: This is still dangerous!. We should not 841 * be rebooting at *all* if UMS is enabled, since 842 * the UMS host could have dirty FAT cache entries 843 * yet to flush. 844 */ 845 setUsbMassStorageEnabled(false); 846 } else if (state.equals(Environment.MEDIA_CHECKING)) { 847 /* 848 * If the media is being checked, then we need to wait for 849 * it to complete before being able to proceed. 850 */ 851 // XXX: @hackbod - Should we disable the ANR timer here? 852 int retries = 30; 853 while (state.equals(Environment.MEDIA_CHECKING) && (retries-- >=0)) { 854 try { 855 Thread.sleep(1000); 856 } catch (InterruptedException iex) { 857 Log.e(TAG, "Interrupted while waiting for media", iex); 858 break; 859 } 860 state = Environment.getExternalStorageState(); 861 } 862 if (retries == 0) { 863 Log.e(TAG, "Timed out waiting for media to check"); 864 } 865 } 866 867 if (state.equals(Environment.MEDIA_MOUNTED)) { 868 /* 869 * If the media is mounted, then gracefully unmount it. 870 */ 871 if (doUnmountVolume(path, true) != StorageResultCode.OperationSucceeded) { 872 Log.e(TAG, "Failed to unmount media for shutdown"); 873 } 874 } 875 } 876 877 private boolean getUmsEnabling() { 878 synchronized (mListeners) { 879 return mUmsEnabling; 880 } 881 } 882 883 private void setUmsEnabling(boolean enable) { 884 synchronized (mListeners) { 885 mUmsEnabling = true; 886 } 887 } 888 889 public boolean isUsbMassStorageConnected() { 890 waitForReady(); 891 892 if (getUmsEnabling()) { 893 return true; 894 } 895 return doGetShareMethodAvailable("ums"); 896 } 897 898 public void setUsbMassStorageEnabled(boolean enable) { 899 waitForReady(); 900 validatePermission(android.Manifest.permission.MOUNT_UNMOUNT_FILESYSTEMS); 901 902 // TODO: Add support for multiple share methods 903 904 /* 905 * If the volume is mounted and we're enabling then unmount it 906 */ 907 String path = Environment.getExternalStorageDirectory().getPath(); 908 String vs = getVolumeState(path); 909 String method = "ums"; 910 if (enable && vs.equals(Environment.MEDIA_MOUNTED)) { 911 // Override for isUsbMassStorageEnabled() 912 setUmsEnabling(enable); 913 UmsEnableCallBack umscb = new UmsEnableCallBack(path, method, true); 914 mHandler.sendMessage(mHandler.obtainMessage(H_UNMOUNT_PM_UPDATE, umscb)); 915 // Clear override 916 setUmsEnabling(false); 917 } 918 /* 919 * If we disabled UMS then mount the volume 920 */ 921 if (!enable) { 922 doShareUnshareVolume(path, method, enable); 923 if (doMountVolume(path) != StorageResultCode.OperationSucceeded) { 924 Log.e(TAG, "Failed to remount " + path + 925 " after disabling share method " + method); 926 /* 927 * Even though the mount failed, the unshare didn't so don't indicate an error. 928 * The mountVolume() call will have set the storage state and sent the necessary 929 * broadcasts. 930 */ 931 } 932 } 933 } 934 935 public boolean isUsbMassStorageEnabled() { 936 waitForReady(); 937 return doGetVolumeShared(Environment.getExternalStorageDirectory().getPath(), "ums"); 938 } 939 940 /** 941 * @return state of the volume at the specified mount point 942 */ 943 public String getVolumeState(String mountPoint) { 944 /* 945 * XXX: Until we have multiple volume discovery, just hardwire 946 * this to /sdcard 947 */ 948 if (!mountPoint.equals(Environment.getExternalStorageDirectory().getPath())) { 949 Log.w(TAG, "getVolumeState(" + mountPoint + "): Unknown volume"); 950 throw new IllegalArgumentException(); 951 } 952 953 return mLegacyState; 954 } 955 956 public int mountVolume(String path) { 957 validatePermission(android.Manifest.permission.MOUNT_UNMOUNT_FILESYSTEMS); 958 959 waitForReady(); 960 return doMountVolume(path); 961 } 962 963 public void unmountVolume(String path, boolean force) { 964 validatePermission(android.Manifest.permission.MOUNT_UNMOUNT_FILESYSTEMS); 965 waitForReady(); 966 967 UnmountCallBack ucb = new UnmountCallBack(path, force); 968 mHandler.sendMessage(mHandler.obtainMessage(H_UNMOUNT_PM_UPDATE, ucb)); 969 } 970 971 public int formatVolume(String path) { 972 validatePermission(android.Manifest.permission.MOUNT_FORMAT_FILESYSTEMS); 973 waitForReady(); 974 975 return doFormatVolume(path); 976 } 977 978 public int []getStorageUsers(String path) { 979 validatePermission(android.Manifest.permission.MOUNT_UNMOUNT_FILESYSTEMS); 980 waitForReady(); 981 try { 982 String[] r = mConnector.doListCommand( 983 String.format("storage users %s", path), 984 VoldResponseCode.StorageUsersListResult); 985 // FMT: <pid> <process name> 986 int[] data = new int[r.length]; 987 for (int i = 0; i < r.length; i++) { 988 String []tok = r[i].split(" "); 989 try { 990 data[i] = Integer.parseInt(tok[0]); 991 } catch (NumberFormatException nfe) { 992 Log.e(TAG, String.format("Error parsing pid %s", tok[0])); 993 return new int[0]; 994 } 995 } 996 return data; 997 } catch (NativeDaemonConnectorException e) { 998 Log.e(TAG, "Failed to retrieve storage users list", e); 999 return new int[0]; 1000 } 1001 } 1002 1003 private void warnOnNotMounted() { 1004 if (!Environment.getExternalStorageState().equals(Environment.MEDIA_MOUNTED)) { 1005 Log.w(TAG, "getSecureContainerList() called when storage not mounted"); 1006 } 1007 } 1008 1009 public String[] getSecureContainerList() { 1010 validatePermission(android.Manifest.permission.ASEC_ACCESS); 1011 waitForReady(); 1012 warnOnNotMounted(); 1013 1014 try { 1015 return mConnector.doListCommand("asec list", VoldResponseCode.AsecListResult); 1016 } catch (NativeDaemonConnectorException e) { 1017 return new String[0]; 1018 } 1019 } 1020 1021 public int createSecureContainer(String id, int sizeMb, String fstype, 1022 String key, int ownerUid) { 1023 validatePermission(android.Manifest.permission.ASEC_CREATE); 1024 waitForReady(); 1025 warnOnNotMounted(); 1026 1027 int rc = StorageResultCode.OperationSucceeded; 1028 String cmd = String.format("asec create %s %d %s %s %d", id, sizeMb, fstype, key, ownerUid); 1029 try { 1030 mConnector.doCommand(cmd); 1031 } catch (NativeDaemonConnectorException e) { 1032 rc = StorageResultCode.OperationFailedInternalError; 1033 } 1034 1035 if (rc == StorageResultCode.OperationSucceeded) { 1036 synchronized (mAsecMountSet) { 1037 mAsecMountSet.add(id); 1038 } 1039 } 1040 return rc; 1041 } 1042 1043 public int finalizeSecureContainer(String id) { 1044 validatePermission(android.Manifest.permission.ASEC_CREATE); 1045 warnOnNotMounted(); 1046 1047 int rc = StorageResultCode.OperationSucceeded; 1048 try { 1049 mConnector.doCommand(String.format("asec finalize %s", id)); 1050 /* 1051 * Finalization does a remount, so no need 1052 * to update mAsecMountSet 1053 */ 1054 } catch (NativeDaemonConnectorException e) { 1055 rc = StorageResultCode.OperationFailedInternalError; 1056 } 1057 return rc; 1058 } 1059 1060 public int destroySecureContainer(String id, boolean force) { 1061 validatePermission(android.Manifest.permission.ASEC_DESTROY); 1062 waitForReady(); 1063 warnOnNotMounted(); 1064 1065 int rc = StorageResultCode.OperationSucceeded; 1066 try { 1067 mConnector.doCommand(String.format("asec destroy %s%s", id, (force ? " force" : ""))); 1068 } catch (NativeDaemonConnectorException e) { 1069 int code = e.getCode(); 1070 if (code == VoldResponseCode.OpFailedStorageBusy) { 1071 rc = StorageResultCode.OperationFailedStorageBusy; 1072 } else { 1073 rc = StorageResultCode.OperationFailedInternalError; 1074 } 1075 } 1076 1077 if (rc == StorageResultCode.OperationSucceeded) { 1078 synchronized (mAsecMountSet) { 1079 if (mAsecMountSet.contains(id)) { 1080 mAsecMountSet.remove(id); 1081 } 1082 } 1083 } 1084 1085 return rc; 1086 } 1087 1088 public int mountSecureContainer(String id, String key, int ownerUid) { 1089 validatePermission(android.Manifest.permission.ASEC_MOUNT_UNMOUNT); 1090 waitForReady(); 1091 warnOnNotMounted(); 1092 1093 synchronized (mAsecMountSet) { 1094 if (mAsecMountSet.contains(id)) { 1095 return StorageResultCode.OperationFailedStorageMounted; 1096 } 1097 } 1098 1099 int rc = StorageResultCode.OperationSucceeded; 1100 String cmd = String.format("asec mount %s %s %d", id, key, ownerUid); 1101 try { 1102 mConnector.doCommand(cmd); 1103 } catch (NativeDaemonConnectorException e) { 1104 rc = StorageResultCode.OperationFailedInternalError; 1105 } 1106 1107 if (rc == StorageResultCode.OperationSucceeded) { 1108 synchronized (mAsecMountSet) { 1109 mAsecMountSet.add(id); 1110 } 1111 } 1112 return rc; 1113 } 1114 1115 public int unmountSecureContainer(String id, boolean force) { 1116 validatePermission(android.Manifest.permission.ASEC_MOUNT_UNMOUNT); 1117 waitForReady(); 1118 warnOnNotMounted(); 1119 1120 synchronized (mAsecMountSet) { 1121 if (!mAsecMountSet.contains(id)) { 1122 return StorageResultCode.OperationFailedStorageNotMounted; 1123 } 1124 } 1125 1126 int rc = StorageResultCode.OperationSucceeded; 1127 String cmd = String.format("asec unmount %s%s", id, (force ? " force" : "")); 1128 try { 1129 mConnector.doCommand(cmd); 1130 } catch (NativeDaemonConnectorException e) { 1131 int code = e.getCode(); 1132 if (code == VoldResponseCode.OpFailedStorageBusy) { 1133 rc = StorageResultCode.OperationFailedStorageBusy; 1134 } else { 1135 rc = StorageResultCode.OperationFailedInternalError; 1136 } 1137 } 1138 1139 if (rc == StorageResultCode.OperationSucceeded) { 1140 synchronized (mAsecMountSet) { 1141 mAsecMountSet.remove(id); 1142 } 1143 } 1144 return rc; 1145 } 1146 1147 public boolean isSecureContainerMounted(String id) { 1148 validatePermission(android.Manifest.permission.ASEC_ACCESS); 1149 waitForReady(); 1150 warnOnNotMounted(); 1151 1152 synchronized (mAsecMountSet) { 1153 return mAsecMountSet.contains(id); 1154 } 1155 } 1156 1157 public int renameSecureContainer(String oldId, String newId) { 1158 validatePermission(android.Manifest.permission.ASEC_RENAME); 1159 waitForReady(); 1160 warnOnNotMounted(); 1161 1162 synchronized (mAsecMountSet) { 1163 /* 1164 * Because a mounted container has active internal state which cannot be 1165 * changed while active, we must ensure both ids are not currently mounted. 1166 */ 1167 if (mAsecMountSet.contains(oldId) || mAsecMountSet.contains(newId)) { 1168 return StorageResultCode.OperationFailedStorageMounted; 1169 } 1170 } 1171 1172 int rc = StorageResultCode.OperationSucceeded; 1173 String cmd = String.format("asec rename %s %s", oldId, newId); 1174 try { 1175 mConnector.doCommand(cmd); 1176 } catch (NativeDaemonConnectorException e) { 1177 rc = StorageResultCode.OperationFailedInternalError; 1178 } 1179 1180 return rc; 1181 } 1182 1183 public String getSecureContainerPath(String id) { 1184 validatePermission(android.Manifest.permission.ASEC_ACCESS); 1185 waitForReady(); 1186 warnOnNotMounted(); 1187 1188 ArrayList<String> rsp = mConnector.doCommand("asec path " + id); 1189 1190 for (String line : rsp) { 1191 String []tok = line.split(" "); 1192 int code = Integer.parseInt(tok[0]); 1193 if (code == VoldResponseCode.AsecPathResult) { 1194 return tok[1]; 1195 } else { 1196 Log.e(TAG, String.format("Unexpected response code %d", code)); 1197 return ""; 1198 } 1199 } 1200 1201 Log.e(TAG, "Got an empty response"); 1202 return ""; 1203 } 1204} 1205 1206