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|
/*
* Copyright (C) 2007 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.android.server;
import static com.android.internal.util.XmlUtils.readIntAttribute;
import static com.android.internal.util.XmlUtils.readStringAttribute;
import static com.android.internal.util.XmlUtils.writeIntAttribute;
import static com.android.internal.util.XmlUtils.writeStringAttribute;
import static org.xmlpull.v1.XmlPullParser.END_DOCUMENT;
import static org.xmlpull.v1.XmlPullParser.START_TAG;
import android.Manifest;
import android.app.ActivityManagerNative;
import android.app.AppOpsManager;
import android.content.ComponentName;
import android.content.Context;
import android.content.Intent;
import android.content.ServiceConnection;
import android.content.res.Configuration;
import android.content.res.ObbInfo;
import android.mtp.MtpStorage;
import android.net.Uri;
import android.os.Binder;
import android.os.Environment;
import android.os.Environment.UserEnvironment;
import android.os.FileUtils;
import android.os.Handler;
import android.os.HandlerThread;
import android.os.IBinder;
import android.os.Looper;
import android.os.Message;
import android.os.RemoteCallbackList;
import android.os.RemoteException;
import android.os.ServiceManager;
import android.os.SystemClock;
import android.os.SystemProperties;
import android.os.UserHandle;
import android.os.UserManager;
import android.os.storage.DiskInfo;
import android.os.storage.IMountService;
import android.os.storage.IMountServiceListener;
import android.os.storage.IMountShutdownObserver;
import android.os.storage.IObbActionListener;
import android.os.storage.OnObbStateChangeListener;
import android.os.storage.StorageManager;
import android.os.storage.StorageResultCode;
import android.os.storage.StorageVolume;
import android.os.storage.VolumeInfo;
import android.text.TextUtils;
import android.util.ArrayMap;
import android.util.AtomicFile;
import android.util.DebugUtils;
import android.util.Log;
import android.util.Slog;
import android.util.Xml;
import libcore.io.IoUtils;
import libcore.util.EmptyArray;
import libcore.util.HexEncoding;
import com.android.internal.annotations.GuardedBy;
import com.android.internal.annotations.VisibleForTesting;
import com.android.internal.app.IMediaContainerService;
import com.android.internal.os.SomeArgs;
import com.android.internal.util.ArrayUtils;
import com.android.internal.util.FastXmlSerializer;
import com.android.internal.util.IndentingPrintWriter;
import com.android.internal.util.Preconditions;
import com.android.server.NativeDaemonConnector.Command;
import com.android.server.NativeDaemonConnector.SensitiveArg;
import com.android.server.pm.PackageManagerService;
import org.xmlpull.v1.XmlPullParser;
import org.xmlpull.v1.XmlPullParserException;
import org.xmlpull.v1.XmlSerializer;
import java.io.File;
import java.io.FileDescriptor;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.PrintWriter;
import java.math.BigInteger;
import java.nio.charset.StandardCharsets;
import java.security.NoSuchAlgorithmException;
import java.security.spec.InvalidKeySpecException;
import java.security.spec.KeySpec;
import java.text.SimpleDateFormat;
import java.util.ArrayList;
import java.util.Date;
import java.util.HashMap;
import java.util.HashSet;
import java.util.Iterator;
import java.util.LinkedList;
import java.util.List;
import java.util.Locale;
import java.util.Map;
import java.util.Map.Entry;
import java.util.Objects;
import java.util.concurrent.CountDownLatch;
import java.util.concurrent.TimeUnit;
import javax.crypto.SecretKey;
import javax.crypto.SecretKeyFactory;
import javax.crypto.spec.PBEKeySpec;
/**
* Service responsible for various storage media. Connects to {@code vold} to
* watch for and manage dynamically added storage, such as SD cards and USB mass
* storage. Also decides how storage should be presented to users on the device.
*/
class MountService extends IMountService.Stub
implements INativeDaemonConnectorCallbacks, Watchdog.Monitor {
// TODO: finish enforcing UserManager.DISALLOW_MOUNT_PHYSICAL_MEDIA
// Static direct instance pointer for the tightly-coupled idle service to use
static MountService sSelf = null;
public static class Lifecycle extends SystemService {
private MountService mMountService;
public Lifecycle(Context context) {
super(context);
}
@Override
public void onStart() {
mMountService = new MountService(getContext());
publishBinderService("mount", mMountService);
}
@Override
public void onBootPhase(int phase) {
if (phase == SystemService.PHASE_ACTIVITY_MANAGER_READY) {
mMountService.systemReady();
}
}
@Override
public void onStartUser(int userHandle) {
mMountService.onStartUser(userHandle);
}
@Override
public void onCleanupUser(int userHandle) {
mMountService.onCleanupUser(userHandle);
}
}
private static final boolean LOCAL_LOGD = false;
private static final boolean DEBUG_EVENTS = false;
private static final boolean DEBUG_OBB = false;
// Disable this since it messes up long-running cryptfs operations.
private static final boolean WATCHDOG_ENABLE = false;
private static final String TAG = "MountService";
private static final String VOLD_TAG = "VoldConnector";
/** Maximum number of ASEC containers allowed to be mounted. */
private static final int MAX_CONTAINERS = 250;
/*
* Internal vold response code constants
*/
class VoldResponseCode {
/*
* 100 series - Requestion action was initiated; expect another reply
* before proceeding with a new command.
*/
public static final int VolumeListResult = 110;
public static final int AsecListResult = 111;
public static final int StorageUsersListResult = 112;
public static final int CryptfsGetfieldResult = 113;
/*
* 200 series - Requestion action has been successfully completed.
*/
public static final int ShareStatusResult = 210;
public static final int AsecPathResult = 211;
public static final int ShareEnabledResult = 212;
/*
* 400 series - Command was accepted, but the requested action
* did not take place.
*/
public static final int OpFailedNoMedia = 401;
public static final int OpFailedMediaBlank = 402;
public static final int OpFailedMediaCorrupt = 403;
public static final int OpFailedVolNotMounted = 404;
public static final int OpFailedStorageBusy = 405;
public static final int OpFailedStorageNotFound = 406;
/*
* 600 series - Unsolicited broadcasts.
*/
public static final int DISK_CREATED = 640;
public static final int DISK_SIZE_CHANGED = 641;
public static final int DISK_LABEL_CHANGED = 642;
public static final int DISK_VOLUME_CREATED = 643;
public static final int DISK_VOLUME_DESTROYED = 644;
public static final int DISK_DESTROYED = 649;
public static final int VOLUME_CREATED = 650;
public static final int VOLUME_STATE_CHANGED = 651;
public static final int VOLUME_FS_TYPE_CHANGED = 652;
public static final int VOLUME_FS_UUID_CHANGED = 653;
public static final int VOLUME_FS_LABEL_CHANGED = 654;
public static final int VOLUME_PATH_CHANGED = 655;
public static final int VOLUME_DESTROYED = 659;
/*
* 700 series - fstrim
*/
public static final int FstrimCompleted = 700;
}
private static final String TAG_VOLUMES = "volumes";
private static final String TAG_VOLUME = "volume";
private static final String ATTR_TYPE = "type";
private static final String ATTR_FS_UUID = "fsUuid";
private static final String ATTR_NICKNAME = "nickname";
private static final String ATTR_USER_FLAGS = "userFlags";
private final AtomicFile mMetadataFile;
private static class VolumeMetadata {
public final int type;
public final String fsUuid;
public String nickname;
public int userFlags;
public VolumeMetadata(int type, String fsUuid) {
this.type = type;
this.fsUuid = Preconditions.checkNotNull(fsUuid);
}
public static VolumeMetadata read(XmlPullParser in) throws IOException {
final int type = readIntAttribute(in, ATTR_TYPE);
final String fsUuid = readStringAttribute(in, ATTR_FS_UUID);
final VolumeMetadata meta = new VolumeMetadata(type, fsUuid);
meta.nickname = readStringAttribute(in, ATTR_NICKNAME);
meta.userFlags = readIntAttribute(in, ATTR_USER_FLAGS);
return meta;
}
public static void write(XmlSerializer out, VolumeMetadata meta) throws IOException {
out.startTag(null, TAG_VOLUME);
writeIntAttribute(out, ATTR_TYPE, meta.type);
writeStringAttribute(out, ATTR_FS_UUID, meta.fsUuid);
writeStringAttribute(out, ATTR_NICKNAME, meta.nickname);
writeIntAttribute(out, ATTR_USER_FLAGS, meta.userFlags);
out.endTag(null, TAG_VOLUME);
}
public void dump(IndentingPrintWriter pw) {
pw.println("VolumeMetadata:");
pw.increaseIndent();
pw.printPair("type", DebugUtils.valueToString(VolumeInfo.class, "TYPE_", type));
pw.printPair("fsUuid", fsUuid);
pw.printPair("nickname", nickname);
pw.printPair("userFlags",
DebugUtils.flagsToString(VolumeInfo.class, "USER_FLAG_", userFlags));
pw.decreaseIndent();
pw.println();
}
}
/**
* <em>Never</em> hold the lock while performing downcalls into vold, since
* unsolicited events can suddenly appear to update data structures.
*/
private final Object mLock = new Object();
@GuardedBy("mLock")
private int[] mStartedUsers = EmptyArray.INT;
/** Map from disk ID to disk */
@GuardedBy("mLock")
private ArrayMap<String, DiskInfo> mDisks = new ArrayMap<>();
/** Map from volume ID to disk */
@GuardedBy("mLock")
private ArrayMap<String, VolumeInfo> mVolumes = new ArrayMap<>();
/** Map from UUID to metadata */
@GuardedBy("mLock")
private ArrayMap<String, VolumeMetadata> mMetadata = new ArrayMap<>();
private DiskInfo findDiskById(String id) {
synchronized (mLock) {
final DiskInfo disk = mDisks.get(id);
if (disk != null) {
return disk;
}
}
throw new IllegalArgumentException("No disk found for ID " + id);
}
private VolumeInfo findVolumeById(String id) {
synchronized (mLock) {
final VolumeInfo vol = mVolumes.get(id);
if (vol != null) {
return vol;
}
}
throw new IllegalArgumentException("No volume found for ID " + id);
}
@Deprecated
private String findVolumeIdForPath(String path) {
synchronized (mLock) {
for (int i = 0; i < mVolumes.size(); i++) {
final VolumeInfo vol = mVolumes.valueAt(i);
if (vol.path != null && path.startsWith(vol.path)) {
return vol.id;
}
}
}
throw new IllegalArgumentException("No volume found for path " + path);
}
private VolumeMetadata findOrCreateMetadataLocked(VolumeInfo vol) {
VolumeMetadata meta = mMetadata.get(vol.fsUuid);
if (meta == null) {
meta = new VolumeMetadata(vol.type, vol.fsUuid);
mMetadata.put(meta.fsUuid, meta);
}
return meta;
}
private static int sNextMtpIndex = 1;
private static int allocateMtpIndex(String volId) {
if (VolumeInfo.ID_EMULATED_INTERNAL.equals(volId)) {
return 0;
} else {
return sNextMtpIndex++;
}
}
/** List of crypto types.
* These must match CRYPT_TYPE_XXX in cryptfs.h AND their
* corresponding commands in CommandListener.cpp */
public static final String[] CRYPTO_TYPES
= { "password", "default", "pattern", "pin" };
private final Context mContext;
private final NativeDaemonConnector mConnector;
private volatile boolean mSystemReady = false;
private volatile boolean mDaemonConnected = false;
private PackageManagerService mPms;
private final Callbacks mCallbacks;
private final CountDownLatch mConnectedSignal = new CountDownLatch(1);
private final CountDownLatch mAsecsScanned = new CountDownLatch(1);
private final Object mUnmountLock = new Object();
@GuardedBy("mUnmountLock")
private CountDownLatch mUnmountSignal;
/**
* Private hash of currently mounted secure containers.
* Used as a lock in methods to manipulate secure containers.
*/
final private HashSet<String> mAsecMountSet = new HashSet<String>();
/**
* The size of the crypto algorithm key in bits for OBB files. Currently
* Twofish is used which takes 128-bit keys.
*/
private static final int CRYPTO_ALGORITHM_KEY_SIZE = 128;
/**
* The number of times to run SHA1 in the PBKDF2 function for OBB files.
* 1024 is reasonably secure and not too slow.
*/
private static final int PBKDF2_HASH_ROUNDS = 1024;
/**
* Mounted OBB tracking information. Used to track the current state of all
* OBBs.
*/
final private Map<IBinder, List<ObbState>> mObbMounts = new HashMap<IBinder, List<ObbState>>();
/** Map from raw paths to {@link ObbState}. */
final private Map<String, ObbState> mObbPathToStateMap = new HashMap<String, ObbState>();
class ObbState implements IBinder.DeathRecipient {
public ObbState(String rawPath, String canonicalPath, int callingUid,
IObbActionListener token, int nonce) {
this.rawPath = rawPath;
this.canonicalPath = canonicalPath.toString();
final int userId = UserHandle.getUserId(callingUid);
this.ownerPath = buildObbPath(canonicalPath, userId, false);
this.voldPath = buildObbPath(canonicalPath, userId, true);
this.ownerGid = UserHandle.getSharedAppGid(callingUid);
this.token = token;
this.nonce = nonce;
}
final String rawPath;
final String canonicalPath;
final String ownerPath;
final String voldPath;
final int ownerGid;
// Token of remote Binder caller
final IObbActionListener token;
// Identifier to pass back to the token
final int nonce;
public IBinder getBinder() {
return token.asBinder();
}
@Override
public void binderDied() {
ObbAction action = new UnmountObbAction(this, true);
mObbActionHandler.sendMessage(mObbActionHandler.obtainMessage(OBB_RUN_ACTION, action));
}
public void link() throws RemoteException {
getBinder().linkToDeath(this, 0);
}
public void unlink() {
getBinder().unlinkToDeath(this, 0);
}
@Override
public String toString() {
StringBuilder sb = new StringBuilder("ObbState{");
sb.append("rawPath=").append(rawPath);
sb.append(",canonicalPath=").append(canonicalPath);
sb.append(",ownerPath=").append(ownerPath);
sb.append(",voldPath=").append(voldPath);
sb.append(",ownerGid=").append(ownerGid);
sb.append(",token=").append(token);
sb.append(",binder=").append(getBinder());
sb.append('}');
return sb.toString();
}
}
// OBB Action Handler
final private ObbActionHandler mObbActionHandler;
// OBB action handler messages
private static final int OBB_RUN_ACTION = 1;
private static final int OBB_MCS_BOUND = 2;
private static final int OBB_MCS_UNBIND = 3;
private static final int OBB_MCS_RECONNECT = 4;
private static final int OBB_FLUSH_MOUNT_STATE = 5;
/*
* Default Container Service information
*/
static final ComponentName DEFAULT_CONTAINER_COMPONENT = new ComponentName(
"com.android.defcontainer", "com.android.defcontainer.DefaultContainerService");
final private DefaultContainerConnection mDefContainerConn = new DefaultContainerConnection();
class DefaultContainerConnection implements ServiceConnection {
@Override
public void onServiceConnected(ComponentName name, IBinder service) {
if (DEBUG_OBB)
Slog.i(TAG, "onServiceConnected");
IMediaContainerService imcs = IMediaContainerService.Stub.asInterface(service);
mObbActionHandler.sendMessage(mObbActionHandler.obtainMessage(OBB_MCS_BOUND, imcs));
}
@Override
public void onServiceDisconnected(ComponentName name) {
if (DEBUG_OBB)
Slog.i(TAG, "onServiceDisconnected");
}
};
// Used in the ObbActionHandler
private IMediaContainerService mContainerService = null;
// Last fstrim operation tracking
private static final String LAST_FSTRIM_FILE = "last-fstrim";
private final File mLastMaintenanceFile;
private long mLastMaintenance;
// Handler messages
private static final int H_SYSTEM_READY = 1;
private static final int H_DAEMON_CONNECTED = 2;
private static final int H_SHUTDOWN = 3;
private static final int H_FSTRIM = 4;
private static final int H_VOLUME_MOUNT = 5;
private static final int H_VOLUME_BROADCAST = 6;
class MountServiceHandler extends Handler {
public MountServiceHandler(Looper looper) {
super(looper);
}
@Override
public void handleMessage(Message msg) {
switch (msg.what) {
case H_SYSTEM_READY: {
handleSystemReady();
break;
}
case H_DAEMON_CONNECTED: {
handleDaemonConnected();
break;
}
case H_FSTRIM: {
waitForReady();
Slog.i(TAG, "Running fstrim idle maintenance");
// Remember when we kicked it off
try {
mLastMaintenance = System.currentTimeMillis();
mLastMaintenanceFile.setLastModified(mLastMaintenance);
} catch (Exception e) {
Slog.e(TAG, "Unable to record last fstrim!");
}
try {
// This method must be run on the main (handler) thread,
// so it is safe to directly call into vold.
mConnector.execute("fstrim", "dotrim");
EventLogTags.writeFstrimStart(SystemClock.elapsedRealtime());
} catch (NativeDaemonConnectorException ndce) {
Slog.e(TAG, "Failed to run fstrim!");
}
// invoke the completion callback, if any
Runnable callback = (Runnable) msg.obj;
if (callback != null) {
callback.run();
}
break;
}
case H_SHUTDOWN: {
final IMountShutdownObserver obs = (IMountShutdownObserver) msg.obj;
boolean success = false;
try {
success = mConnector.execute("volume", "shutdown").isClassOk();
} catch (NativeDaemonConnectorException ignored) {
}
if (obs != null) {
try {
obs.onShutDownComplete(success ? 0 : -1);
} catch (RemoteException ignored) {
}
}
break;
}
case H_VOLUME_MOUNT: {
final VolumeInfo vol = (VolumeInfo) msg.obj;
try {
mConnector.execute("volume", "mount", vol.id, vol.flags, vol.userId);
} catch (NativeDaemonConnectorException ignored) {
}
break;
}
case H_VOLUME_BROADCAST: {
final StorageVolume userVol = (StorageVolume) msg.obj;
final String envState = userVol.getState();
Slog.d(TAG, "Volume " + userVol.getId() + " broadcasting " + envState + " to "
+ userVol.getOwner());
final String action = VolumeInfo.getBroadcastForEnvironment(envState);
if (action != null) {
final Intent intent = new Intent(action,
Uri.fromFile(userVol.getPathFile()));
intent.putExtra(StorageVolume.EXTRA_STORAGE_VOLUME, userVol);
intent.addFlags(Intent.FLAG_RECEIVER_REGISTERED_ONLY_BEFORE_BOOT);
mContext.sendBroadcastAsUser(intent, userVol.getOwner());
}
break;
}
}
}
}
private final Handler mHandler;
@Override
public void waitForAsecScan() {
waitForLatch(mAsecsScanned, "mAsecsScanned");
}
private void waitForReady() {
waitForLatch(mConnectedSignal, "mConnectedSignal");
}
private void waitForLatch(CountDownLatch latch, String condition) {
for (;;) {
try {
if (latch.await(5000, TimeUnit.MILLISECONDS)) {
return;
} else {
Slog.w(TAG, "Thread " + Thread.currentThread().getName()
+ " still waiting for " + condition + "...");
}
} catch (InterruptedException e) {
Slog.w(TAG, "Interrupt while waiting for MountService to be ready.");
}
}
}
private boolean isReady() {
try {
return mConnectedSignal.await(0, TimeUnit.MILLISECONDS);
} catch (InterruptedException e) {
return false;
}
}
private void handleSystemReady() {
resetIfReadyAndConnected();
// Start scheduling nominally-daily fstrim operations
MountServiceIdler.scheduleIdlePass(mContext);
}
private void resetIfReadyAndConnected() {
Slog.d(TAG, "Thinking about reset, mSystemReady=" + mSystemReady
+ ", mDaemonConnected=" + mDaemonConnected);
if (mSystemReady && mDaemonConnected) {
mDisks.clear();
mVolumes.clear();
// Create a stub volume that represents internal storage
final VolumeInfo internal = new VolumeInfo(VolumeInfo.ID_PRIVATE_INTERNAL,
VolumeInfo.TYPE_PRIVATE, 0);
internal.state = VolumeInfo.STATE_MOUNTED;
internal.path = Environment.getDataDirectory().getAbsolutePath();
mVolumes.put(internal.id, internal);
try {
mConnector.execute("volume", "reset");
} catch (NativeDaemonConnectorException e) {
Slog.w(TAG, "Failed to reset vold", e);
}
}
}
private void onStartUser(int userId) {
Slog.d(TAG, "onStartUser " + userId);
// We purposefully block here to make sure that user-specific
// staging area is ready so it's ready for zygote-forked apps to
// bind mount against.
try {
mConnector.execute("volume", "start_user", userId);
} catch (NativeDaemonConnectorException ignored) {
}
// Record user as started so newly mounted volumes kick off events
// correctly, then synthesize events for any already-mounted volumes.
synchronized (mVolumes) {
for (int i = 0; i < mVolumes.size(); i++) {
final VolumeInfo vol = mVolumes.valueAt(i);
if (vol.isVisibleToUser(userId) && vol.state == VolumeInfo.STATE_MOUNTED) {
final StorageVolume userVol = vol.buildStorageVolume(mContext, userId);
mHandler.obtainMessage(H_VOLUME_BROADCAST, userVol).sendToTarget();
mCallbacks.notifyStorageStateChanged(userVol.getPath(),
Environment.MEDIA_MOUNTED, Environment.MEDIA_MOUNTED);
}
}
mStartedUsers = ArrayUtils.appendInt(mStartedUsers, userId);
}
}
private void onCleanupUser(int userId) {
Slog.d(TAG, "onCleanupUser " + userId);
try {
mConnector.execute("volume", "cleanup_user", userId);
} catch (NativeDaemonConnectorException ignored) {
}
synchronized (mVolumes) {
mStartedUsers = ArrayUtils.removeInt(mStartedUsers, userId);
}
}
void runIdleMaintenance(Runnable callback) {
mHandler.sendMessage(mHandler.obtainMessage(H_FSTRIM, callback));
}
// Binder entry point for kicking off an immediate fstrim
@Override
public void runMaintenance() {
enforcePermission(android.Manifest.permission.MOUNT_UNMOUNT_FILESYSTEMS);
runIdleMaintenance(null);
}
@Override
public long lastMaintenance() {
return mLastMaintenance;
}
/**
* Callback from NativeDaemonConnector
*/
@Override
public void onDaemonConnected() {
mDaemonConnected = true;
mHandler.obtainMessage(H_DAEMON_CONNECTED).sendToTarget();
}
private void handleDaemonConnected() {
resetIfReadyAndConnected();
/*
* Now that we've done our initialization, release
* the hounds!
*/
mConnectedSignal.countDown();
// On an encrypted device we can't see system properties yet, so pull
// the system locale out of the mount service.
if ("".equals(SystemProperties.get("vold.encrypt_progress"))) {
copyLocaleFromMountService();
}
// Let package manager load internal ASECs.
mPms.scanAvailableAsecs();
// Notify people waiting for ASECs to be scanned that it's done.
mAsecsScanned.countDown();
}
private void copyLocaleFromMountService() {
String systemLocale;
try {
systemLocale = getField(StorageManager.SYSTEM_LOCALE_KEY);
} catch (RemoteException e) {
return;
}
if (TextUtils.isEmpty(systemLocale)) {
return;
}
Slog.d(TAG, "Got locale " + systemLocale + " from mount service");
Locale locale = Locale.forLanguageTag(systemLocale);
Configuration config = new Configuration();
config.setLocale(locale);
try {
ActivityManagerNative.getDefault().updateConfiguration(config);
} catch (RemoteException e) {
Slog.e(TAG, "Error setting system locale from mount service", e);
}
// Temporary workaround for http://b/17945169.
Slog.d(TAG, "Setting system properties to " + systemLocale + " from mount service");
SystemProperties.set("persist.sys.locale", locale.toLanguageTag());
}
/**
* Callback from NativeDaemonConnector
*/
@Override
public boolean onCheckHoldWakeLock(int code) {
return false;
}
/**
* Callback from NativeDaemonConnector
*/
@Override
public boolean onEvent(int code, String raw, String[] cooked) {
synchronized (mLock) {
return onEventLocked(code, raw, cooked);
}
}
private boolean onEventLocked(int code, String raw, String[] cooked) {
switch (code) {
case VoldResponseCode.DISK_CREATED: {
if (cooked.length != 3) break;
final String id = cooked[1];
final int flags = Integer.parseInt(cooked[2]);
mDisks.put(id, new DiskInfo(id, flags));
break;
}
case VoldResponseCode.DISK_SIZE_CHANGED: {
if (cooked.length != 3) break;
final DiskInfo disk = mDisks.get(cooked[1]);
if (disk != null) {
disk.size = Long.parseLong(cooked[2]);
}
break;
}
case VoldResponseCode.DISK_LABEL_CHANGED: {
if (cooked.length != 3) break;
final DiskInfo disk = mDisks.get(cooked[1]);
if (disk != null) {
disk.label = cooked[2];
}
break;
}
case VoldResponseCode.DISK_VOLUME_CREATED: {
if (cooked.length != 3) break;
final String diskId = cooked[1];
final String volId = cooked[2];
final DiskInfo disk = mDisks.get(diskId);
if (disk != null) {
disk.volumeIds = ArrayUtils.appendElement(String.class, disk.volumeIds, volId);
}
final VolumeInfo vol = mVolumes.get(volId);
if (vol != null) {
vol.diskId = diskId;
}
break;
}
case VoldResponseCode.DISK_VOLUME_DESTROYED: {
if (cooked.length != 3) break;
final String diskId = cooked[1];
final String volId = cooked[2];
final DiskInfo disk = mDisks.get(diskId);
if (disk != null) {
disk.volumeIds = ArrayUtils.removeElement(String.class, disk.volumeIds, volId);
}
final VolumeInfo vol = mVolumes.get(volId);
if (vol != null) {
vol.diskId = null;
}
break;
}
case VoldResponseCode.DISK_DESTROYED: {
if (cooked.length != 2) break;
mDisks.remove(cooked[1]);
break;
}
case VoldResponseCode.VOLUME_CREATED: {
if (cooked.length != 3) break;
final String id = cooked[1];
final int type = Integer.parseInt(cooked[2]);
final int mtpIndex = allocateMtpIndex(id);
final VolumeInfo vol = new VolumeInfo(id, type, mtpIndex);
mVolumes.put(id, vol);
onVolumeCreatedLocked(vol);
break;
}
case VoldResponseCode.VOLUME_STATE_CHANGED: {
if (cooked.length != 3) break;
final VolumeInfo vol = mVolumes.get(cooked[1]);
if (vol != null) {
final int oldState = vol.state;
final int newState = Integer.parseInt(cooked[2]);
vol.state = newState;
onVolumeStateChangedLocked(vol, oldState, newState);
}
break;
}
case VoldResponseCode.VOLUME_FS_TYPE_CHANGED: {
if (cooked.length != 3) break;
final VolumeInfo vol = mVolumes.get(cooked[1]);
if (vol != null) {
vol.fsType = cooked[2];
}
mCallbacks.notifyVolumeMetadataChanged(vol.clone());
break;
}
case VoldResponseCode.VOLUME_FS_UUID_CHANGED: {
if (cooked.length != 3) break;
final VolumeInfo vol = mVolumes.get(cooked[1]);
if (vol != null) {
vol.fsUuid = cooked[2];
}
refreshMetadataLocked();
mCallbacks.notifyVolumeMetadataChanged(vol.clone());
break;
}
case VoldResponseCode.VOLUME_FS_LABEL_CHANGED: {
if (cooked.length != 3) break;
final VolumeInfo vol = mVolumes.get(cooked[1]);
if (vol != null) {
vol.fsLabel = cooked[2];
}
mCallbacks.notifyVolumeMetadataChanged(vol.clone());
break;
}
case VoldResponseCode.VOLUME_PATH_CHANGED: {
if (cooked.length != 3) break;
final VolumeInfo vol = mVolumes.get(cooked[1]);
if (vol != null) {
vol.path = cooked[2];
}
break;
}
case VoldResponseCode.VOLUME_DESTROYED: {
if (cooked.length != 2) break;
mVolumes.remove(cooked[1]);
break;
}
case VoldResponseCode.FstrimCompleted: {
EventLogTags.writeFstrimFinish(SystemClock.elapsedRealtime());
break;
}
default: {
Slog.d(TAG, "Unhandled vold event " + code);
}
}
return true;
}
private void onVolumeCreatedLocked(VolumeInfo vol) {
final boolean primaryPhysical = SystemProperties.getBoolean(
StorageManager.PROP_PRIMARY_PHYSICAL, false);
// TODO: enable switching to another emulated primary
if (VolumeInfo.ID_EMULATED_INTERNAL.equals(vol.id) && !primaryPhysical) {
vol.flags |= VolumeInfo.FLAG_PRIMARY;
vol.flags |= VolumeInfo.FLAG_VISIBLE;
mHandler.obtainMessage(H_VOLUME_MOUNT, vol).sendToTarget();
} else if (vol.type == VolumeInfo.TYPE_PUBLIC) {
if (primaryPhysical) {
vol.flags |= VolumeInfo.FLAG_PRIMARY;
}
vol.flags |= VolumeInfo.FLAG_VISIBLE;
vol.userId = UserHandle.USER_OWNER;
mHandler.obtainMessage(H_VOLUME_MOUNT, vol).sendToTarget();
} else if (vol.type == VolumeInfo.TYPE_PRIVATE) {
mHandler.obtainMessage(H_VOLUME_MOUNT, vol).sendToTarget();
} else {
Slog.d(TAG, "Skipping automatic mounting of " + vol);
}
}
private void onVolumeStateChangedLocked(VolumeInfo vol, int oldState, int newState) {
mCallbacks.notifyVolumeStateChanged(vol.clone(), oldState, newState);
final String oldStateEnv = VolumeInfo.getEnvironmentForState(oldState);
final String newStateEnv = VolumeInfo.getEnvironmentForState(newState);
if (!Objects.equals(oldStateEnv, newStateEnv)) {
// Kick state changed event towards all started users. Any users
// started after this point will trigger additional
// user-specific broadcasts.
for (int userId : mStartedUsers) {
if (vol.isVisibleToUser(userId)) {
final StorageVolume userVol = vol.buildStorageVolume(mContext, userId);
mHandler.obtainMessage(H_VOLUME_BROADCAST, userVol).sendToTarget();
mCallbacks.notifyStorageStateChanged(userVol.getPath(), oldStateEnv,
newStateEnv);
}
}
}
if (vol.type == VolumeInfo.TYPE_PUBLIC && vol.state == VolumeInfo.STATE_UNMOUNTING) {
// TODO: this should eventually be handled by new ObbVolume state changes
/*
* Some OBBs might have been unmounted when this volume was
* unmounted, so send a message to the handler to let it know to
* remove those from the list of mounted OBBS.
*/
mObbActionHandler.sendMessage(mObbActionHandler.obtainMessage(
OBB_FLUSH_MOUNT_STATE, vol.path));
}
}
/**
* Refresh latest metadata into any currently active {@link VolumeInfo}.
*/
private void refreshMetadataLocked() {
final int size = mVolumes.size();
for (int i = 0; i < size; i++) {
final VolumeInfo vol = mVolumes.valueAt(i);
final VolumeMetadata meta = mMetadata.get(vol.fsUuid);
if (meta != null) {
vol.nickname = meta.nickname;
vol.userFlags = meta.userFlags;
} else {
vol.nickname = null;
vol.userFlags = 0;
}
}
}
private void enforcePermission(String perm) {
mContext.enforceCallingOrSelfPermission(perm, perm);
}
private void enforceUserRestriction(String restriction) {
UserManager um = (UserManager) mContext.getSystemService(Context.USER_SERVICE);
if (um.hasUserRestriction(restriction, Binder.getCallingUserHandle())) {
throw new SecurityException("User has restriction " + restriction);
}
}
/**
* Constructs a new MountService instance
*
* @param context Binder context for this service
*/
public MountService(Context context) {
sSelf = this;
mContext = context;
mCallbacks = new Callbacks(FgThread.get().getLooper());
// XXX: This will go away soon in favor of IMountServiceObserver
mPms = (PackageManagerService) ServiceManager.getService("package");
HandlerThread hthread = new HandlerThread(TAG);
hthread.start();
mHandler = new MountServiceHandler(hthread.getLooper());
// Add OBB Action Handler to MountService thread.
mObbActionHandler = new ObbActionHandler(IoThread.get().getLooper());
// Initialize the last-fstrim tracking if necessary
File dataDir = Environment.getDataDirectory();
File systemDir = new File(dataDir, "system");
mLastMaintenanceFile = new File(systemDir, LAST_FSTRIM_FILE);
if (!mLastMaintenanceFile.exists()) {
// Not setting mLastMaintenance here means that we will force an
// fstrim during reboot following the OTA that installs this code.
try {
(new FileOutputStream(mLastMaintenanceFile)).close();
} catch (IOException e) {
Slog.e(TAG, "Unable to create fstrim record " + mLastMaintenanceFile.getPath());
}
} else {
mLastMaintenance = mLastMaintenanceFile.lastModified();
}
mMetadataFile = new AtomicFile(
new File(Environment.getSystemSecureDirectory(), "storage.xml"));
synchronized (mLock) {
readMetadataLocked();
}
/*
* Create the connection to vold with a maximum queue of twice the
* amount of containers we'd ever expect to have. This keeps an
* "asec list" from blocking a thread repeatedly.
*/
mConnector = new NativeDaemonConnector(this, "vold", MAX_CONTAINERS * 2, VOLD_TAG, 25,
null);
mConnector.setDebug(true);
Thread thread = new Thread(mConnector, VOLD_TAG);
thread.start();
// Add ourself to the Watchdog monitors if enabled.
if (WATCHDOG_ENABLE) {
Watchdog.getInstance().addMonitor(this);
}
}
private void systemReady() {
mSystemReady = true;
mHandler.obtainMessage(H_SYSTEM_READY).sendToTarget();
}
private void readMetadataLocked() {
mMetadata.clear();
FileInputStream fis = null;
try {
fis = mMetadataFile.openRead();
final XmlPullParser in = Xml.newPullParser();
in.setInput(fis, null);
int type;
while ((type = in.next()) != END_DOCUMENT) {
if (type == START_TAG) {
final String tag = in.getName();
if (TAG_VOLUME.equals(tag)) {
final VolumeMetadata meta = VolumeMetadata.read(in);
mMetadata.put(meta.fsUuid, meta);
}
}
}
} catch (FileNotFoundException e) {
// Missing metadata is okay, probably first boot
} catch (IOException e) {
Slog.wtf(TAG, "Failed reading metadata", e);
} catch (XmlPullParserException e) {
Slog.wtf(TAG, "Failed reading metadata", e);
} finally {
IoUtils.closeQuietly(fis);
}
}
private void writeMetadataLocked() {
FileOutputStream fos = null;
try {
fos = mMetadataFile.startWrite();
XmlSerializer out = new FastXmlSerializer();
out.setOutput(fos, "utf-8");
out.startDocument(null, true);
out.startTag(null, TAG_VOLUMES);
final int size = mMetadata.size();
for (int i = 0; i < size; i++) {
final VolumeMetadata meta = mMetadata.valueAt(i);
VolumeMetadata.write(out, meta);
}
out.endTag(null, TAG_VOLUMES);
out.endDocument();
mMetadataFile.finishWrite(fos);
} catch (IOException e) {
if (fos != null) {
mMetadataFile.failWrite(fos);
}
}
}
/**
* Exposed API calls below here
*/
@Override
public void registerListener(IMountServiceListener listener) {
mCallbacks.register(listener);
}
@Override
public void unregisterListener(IMountServiceListener listener) {
mCallbacks.unregister(listener);
}
@Override
public void shutdown(final IMountShutdownObserver observer) {
enforcePermission(android.Manifest.permission.SHUTDOWN);
Slog.i(TAG, "Shutting down");
mHandler.obtainMessage(H_SHUTDOWN, observer).sendToTarget();
}
@Override
public boolean isUsbMassStorageConnected() {
throw new UnsupportedOperationException();
}
@Override
public void setUsbMassStorageEnabled(boolean enable) {
throw new UnsupportedOperationException();
}
@Override
public boolean isUsbMassStorageEnabled() {
throw new UnsupportedOperationException();
}
@Override
public String getVolumeState(String mountPoint) {
throw new UnsupportedOperationException();
}
@Override
public boolean isExternalStorageEmulated() {
throw new UnsupportedOperationException();
}
@Override
public int mountVolume(String path) {
mount(findVolumeIdForPath(path));
return 0;
}
@Override
public void unmountVolume(String path, boolean force, boolean removeEncryption) {
unmount(findVolumeIdForPath(path));
}
@Override
public int formatVolume(String path) {
format(findVolumeIdForPath(path));
return 0;
}
@Override
public void mount(String volId) {
enforcePermission(android.Manifest.permission.MOUNT_UNMOUNT_FILESYSTEMS);
waitForReady();
final VolumeInfo vol = findVolumeById(volId);
if (vol.type == VolumeInfo.TYPE_PUBLIC || vol.type == VolumeInfo.TYPE_PRIVATE) {
enforceUserRestriction(UserManager.DISALLOW_MOUNT_PHYSICAL_MEDIA);
}
try {
mConnector.execute("volume", "mount", vol.id, vol.flags, vol.userId);
} catch (NativeDaemonConnectorException e) {
throw e.rethrowAsParcelableException();
}
}
@Override
public void unmount(String volId) {
enforcePermission(android.Manifest.permission.MOUNT_UNMOUNT_FILESYSTEMS);
waitForReady();
final VolumeInfo vol = findVolumeById(volId);
// TODO: expand PMS to know about multiple volumes
if (vol.isPrimary()) {
synchronized (mUnmountLock) {
mUnmountSignal = new CountDownLatch(1);
mPms.updateExternalMediaStatus(false, true);
waitForLatch(mUnmountSignal, "mUnmountSignal");
mUnmountSignal = null;
}
}
try {
mConnector.execute("volume", "unmount", vol.id);
} catch (NativeDaemonConnectorException e) {
throw e.rethrowAsParcelableException();
}
}
@Override
public void format(String volId) {
enforcePermission(android.Manifest.permission.MOUNT_FORMAT_FILESYSTEMS);
waitForReady();
final VolumeInfo vol = findVolumeById(volId);
try {
mConnector.execute("volume", "format", vol.id);
} catch (NativeDaemonConnectorException e) {
throw e.rethrowAsParcelableException();
}
}
@Override
public void partitionPublic(String diskId) {
enforcePermission(android.Manifest.permission.MOUNT_FORMAT_FILESYSTEMS);
waitForReady();
try {
mConnector.execute("volume", "partition", diskId, "public");
} catch (NativeDaemonConnectorException e) {
throw e.rethrowAsParcelableException();
}
}
@Override
public void partitionPrivate(String diskId) {
enforcePermission(android.Manifest.permission.MOUNT_FORMAT_FILESYSTEMS);
waitForReady();
try {
mConnector.execute("volume", "partition", diskId, "private");
} catch (NativeDaemonConnectorException e) {
throw e.rethrowAsParcelableException();
}
}
@Override
public void partitionMixed(String diskId, int ratio) {
enforcePermission(android.Manifest.permission.MOUNT_FORMAT_FILESYSTEMS);
waitForReady();
try {
mConnector.execute("volume", "partition", diskId, "mixed", ratio);
} catch (NativeDaemonConnectorException e) {
throw e.rethrowAsParcelableException();
}
}
@Override
public void setVolumeNickname(String volId, String nickname) {
enforcePermission(android.Manifest.permission.MOUNT_UNMOUNT_FILESYSTEMS);
waitForReady();
synchronized (mLock) {
final VolumeInfo vol = findVolumeById(volId);
final VolumeMetadata meta = findOrCreateMetadataLocked(vol);
meta.nickname = nickname;
refreshMetadataLocked();
writeMetadataLocked();
mCallbacks.notifyVolumeMetadataChanged(vol.clone());
}
}
@Override
public void setVolumeUserFlags(String volId, int flags, int mask) {
enforcePermission(android.Manifest.permission.MOUNT_UNMOUNT_FILESYSTEMS);
waitForReady();
synchronized (mLock) {
final VolumeInfo vol = findVolumeById(volId);
final VolumeMetadata meta = findOrCreateMetadataLocked(vol);
meta.userFlags = (meta.userFlags & ~mask) | (flags & mask);
refreshMetadataLocked();
writeMetadataLocked();
mCallbacks.notifyVolumeMetadataChanged(vol.clone());
}
}
@Override
public int[] getStorageUsers(String path) {
enforcePermission(android.Manifest.permission.MOUNT_UNMOUNT_FILESYSTEMS);
waitForReady();
try {
final String[] r = NativeDaemonEvent.filterMessageList(
mConnector.executeForList("storage", "users", path),
VoldResponseCode.StorageUsersListResult);
// FMT: <pid> <process name>
int[] data = new int[r.length];
for (int i = 0; i < r.length; i++) {
String[] tok = r[i].split(" ");
try {
data[i] = Integer.parseInt(tok[0]);
} catch (NumberFormatException nfe) {
Slog.e(TAG, String.format("Error parsing pid %s", tok[0]));
return new int[0];
}
}
return data;
} catch (NativeDaemonConnectorException e) {
Slog.e(TAG, "Failed to retrieve storage users list", e);
return new int[0];
}
}
private void warnOnNotMounted() {
synchronized (mLock) {
for (int i = 0; i < mVolumes.size(); i++) {
final VolumeInfo vol = mVolumes.valueAt(i);
if (vol.isPrimary() && vol.state == VolumeInfo.STATE_MOUNTED) {
// Cool beans, we have a mounted primary volume
return;
}
}
}
Slog.w(TAG, "No primary storage mounted!");
}
public String[] getSecureContainerList() {
enforcePermission(android.Manifest.permission.ASEC_ACCESS);
waitForReady();
warnOnNotMounted();
try {
return NativeDaemonEvent.filterMessageList(
mConnector.executeForList("asec", "list"), VoldResponseCode.AsecListResult);
} catch (NativeDaemonConnectorException e) {
return new String[0];
}
}
public int createSecureContainer(String id, int sizeMb, String fstype, String key,
int ownerUid, boolean external) {
enforcePermission(android.Manifest.permission.ASEC_CREATE);
waitForReady();
warnOnNotMounted();
int rc = StorageResultCode.OperationSucceeded;
try {
mConnector.execute("asec", "create", id, sizeMb, fstype, new SensitiveArg(key),
ownerUid, external ? "1" : "0");
} catch (NativeDaemonConnectorException e) {
rc = StorageResultCode.OperationFailedInternalError;
}
if (rc == StorageResultCode.OperationSucceeded) {
synchronized (mAsecMountSet) {
mAsecMountSet.add(id);
}
}
return rc;
}
@Override
public int resizeSecureContainer(String id, int sizeMb, String key) {
enforcePermission(android.Manifest.permission.ASEC_CREATE);
waitForReady();
warnOnNotMounted();
int rc = StorageResultCode.OperationSucceeded;
try {
mConnector.execute("asec", "resize", id, sizeMb, new SensitiveArg(key));
} catch (NativeDaemonConnectorException e) {
rc = StorageResultCode.OperationFailedInternalError;
}
return rc;
}
public int finalizeSecureContainer(String id) {
enforcePermission(android.Manifest.permission.ASEC_CREATE);
warnOnNotMounted();
int rc = StorageResultCode.OperationSucceeded;
try {
mConnector.execute("asec", "finalize", id);
/*
* Finalization does a remount, so no need
* to update mAsecMountSet
*/
} catch (NativeDaemonConnectorException e) {
rc = StorageResultCode.OperationFailedInternalError;
}
return rc;
}
public int fixPermissionsSecureContainer(String id, int gid, String filename) {
enforcePermission(android.Manifest.permission.ASEC_CREATE);
warnOnNotMounted();
int rc = StorageResultCode.OperationSucceeded;
try {
mConnector.execute("asec", "fixperms", id, gid, filename);
/*
* Fix permissions does a remount, so no need to update
* mAsecMountSet
*/
} catch (NativeDaemonConnectorException e) {
rc = StorageResultCode.OperationFailedInternalError;
}
return rc;
}
public int destroySecureContainer(String id, boolean force) {
enforcePermission(android.Manifest.permission.ASEC_DESTROY);
waitForReady();
warnOnNotMounted();
/*
* Force a GC to make sure AssetManagers in other threads of the
* system_server are cleaned up. We have to do this since AssetManager
* instances are kept as a WeakReference and it's possible we have files
* open on the external storage.
*/
Runtime.getRuntime().gc();
int rc = StorageResultCode.OperationSucceeded;
try {
final Command cmd = new Command("asec", "destroy", id);
if (force) {
cmd.appendArg("force");
}
mConnector.execute(cmd);
} catch (NativeDaemonConnectorException e) {
int code = e.getCode();
if (code == VoldResponseCode.OpFailedStorageBusy) {
rc = StorageResultCode.OperationFailedStorageBusy;
} else {
rc = StorageResultCode.OperationFailedInternalError;
}
}
if (rc == StorageResultCode.OperationSucceeded) {
synchronized (mAsecMountSet) {
if (mAsecMountSet.contains(id)) {
mAsecMountSet.remove(id);
}
}
}
return rc;
}
public int mountSecureContainer(String id, String key, int ownerUid, boolean readOnly) {
enforcePermission(android.Manifest.permission.ASEC_MOUNT_UNMOUNT);
waitForReady();
warnOnNotMounted();
synchronized (mAsecMountSet) {
if (mAsecMountSet.contains(id)) {
return StorageResultCode.OperationFailedStorageMounted;
}
}
int rc = StorageResultCode.OperationSucceeded;
try {
mConnector.execute("asec", "mount", id, new SensitiveArg(key), ownerUid,
readOnly ? "ro" : "rw");
} catch (NativeDaemonConnectorException e) {
int code = e.getCode();
if (code != VoldResponseCode.OpFailedStorageBusy) {
rc = StorageResultCode.OperationFailedInternalError;
}
}
if (rc == StorageResultCode.OperationSucceeded) {
synchronized (mAsecMountSet) {
mAsecMountSet.add(id);
}
}
return rc;
}
public int unmountSecureContainer(String id, boolean force) {
enforcePermission(android.Manifest.permission.ASEC_MOUNT_UNMOUNT);
waitForReady();
warnOnNotMounted();
synchronized (mAsecMountSet) {
if (!mAsecMountSet.contains(id)) {
return StorageResultCode.OperationFailedStorageNotMounted;
}
}
/*
* Force a GC to make sure AssetManagers in other threads of the
* system_server are cleaned up. We have to do this since AssetManager
* instances are kept as a WeakReference and it's possible we have files
* open on the external storage.
*/
Runtime.getRuntime().gc();
int rc = StorageResultCode.OperationSucceeded;
try {
final Command cmd = new Command("asec", "unmount", id);
if (force) {
cmd.appendArg("force");
}
mConnector.execute(cmd);
} catch (NativeDaemonConnectorException e) {
int code = e.getCode();
if (code == VoldResponseCode.OpFailedStorageBusy) {
rc = StorageResultCode.OperationFailedStorageBusy;
} else {
rc = StorageResultCode.OperationFailedInternalError;
}
}
if (rc == StorageResultCode.OperationSucceeded) {
synchronized (mAsecMountSet) {
mAsecMountSet.remove(id);
}
}
return rc;
}
public boolean isSecureContainerMounted(String id) {
enforcePermission(android.Manifest.permission.ASEC_ACCESS);
waitForReady();
warnOnNotMounted();
synchronized (mAsecMountSet) {
return mAsecMountSet.contains(id);
}
}
public int renameSecureContainer(String oldId, String newId) {
enforcePermission(android.Manifest.permission.ASEC_RENAME);
waitForReady();
warnOnNotMounted();
synchronized (mAsecMountSet) {
/*
* Because a mounted container has active internal state which cannot be
* changed while active, we must ensure both ids are not currently mounted.
*/
if (mAsecMountSet.contains(oldId) || mAsecMountSet.contains(newId)) {
return StorageResultCode.OperationFailedStorageMounted;
}
}
int rc = StorageResultCode.OperationSucceeded;
try {
mConnector.execute("asec", "rename", oldId, newId);
} catch (NativeDaemonConnectorException e) {
rc = StorageResultCode.OperationFailedInternalError;
}
return rc;
}
public String getSecureContainerPath(String id) {
enforcePermission(android.Manifest.permission.ASEC_ACCESS);
waitForReady();
warnOnNotMounted();
final NativeDaemonEvent event;
try {
event = mConnector.execute("asec", "path", id);
event.checkCode(VoldResponseCode.AsecPathResult);
return event.getMessage();
} catch (NativeDaemonConnectorException e) {
int code = e.getCode();
if (code == VoldResponseCode.OpFailedStorageNotFound) {
Slog.i(TAG, String.format("Container '%s' not found", id));
return null;
} else {
throw new IllegalStateException(String.format("Unexpected response code %d", code));
}
}
}
public String getSecureContainerFilesystemPath(String id) {
enforcePermission(android.Manifest.permission.ASEC_ACCESS);
waitForReady();
warnOnNotMounted();
final NativeDaemonEvent event;
try {
event = mConnector.execute("asec", "fspath", id);
event.checkCode(VoldResponseCode.AsecPathResult);
return event.getMessage();
} catch (NativeDaemonConnectorException e) {
int code = e.getCode();
if (code == VoldResponseCode.OpFailedStorageNotFound) {
Slog.i(TAG, String.format("Container '%s' not found", id));
return null;
} else {
throw new IllegalStateException(String.format("Unexpected response code %d", code));
}
}
}
@Override
public void finishMediaUpdate() {
if (mUnmountSignal != null) {
mUnmountSignal.countDown();
} else {
Slog.w(TAG, "Odd, nobody asked to unmount?");
}
}
private boolean isUidOwnerOfPackageOrSystem(String packageName, int callerUid) {
if (callerUid == android.os.Process.SYSTEM_UID) {
return true;
}
if (packageName == null) {
return false;
}
final int packageUid = mPms.getPackageUid(packageName, UserHandle.getUserId(callerUid));
if (DEBUG_OBB) {
Slog.d(TAG, "packageName = " + packageName + ", packageUid = " +
packageUid + ", callerUid = " + callerUid);
}
return callerUid == packageUid;
}
public String getMountedObbPath(String rawPath) {
Preconditions.checkNotNull(rawPath, "rawPath cannot be null");
waitForReady();
warnOnNotMounted();
final ObbState state;
synchronized (mObbPathToStateMap) {
state = mObbPathToStateMap.get(rawPath);
}
if (state == null) {
Slog.w(TAG, "Failed to find OBB mounted at " + rawPath);
return null;
}
final NativeDaemonEvent event;
try {
event = mConnector.execute("obb", "path", state.voldPath);
event.checkCode(VoldResponseCode.AsecPathResult);
return event.getMessage();
} catch (NativeDaemonConnectorException e) {
int code = e.getCode();
if (code == VoldResponseCode.OpFailedStorageNotFound) {
return null;
} else {
throw new IllegalStateException(String.format("Unexpected response code %d", code));
}
}
}
@Override
public boolean isObbMounted(String rawPath) {
Preconditions.checkNotNull(rawPath, "rawPath cannot be null");
synchronized (mObbMounts) {
return mObbPathToStateMap.containsKey(rawPath);
}
}
@Override
public void mountObb(
String rawPath, String canonicalPath, String key, IObbActionListener token, int nonce) {
Preconditions.checkNotNull(rawPath, "rawPath cannot be null");
Preconditions.checkNotNull(canonicalPath, "canonicalPath cannot be null");
Preconditions.checkNotNull(token, "token cannot be null");
final int callingUid = Binder.getCallingUid();
final ObbState obbState = new ObbState(rawPath, canonicalPath, callingUid, token, nonce);
final ObbAction action = new MountObbAction(obbState, key, callingUid);
mObbActionHandler.sendMessage(mObbActionHandler.obtainMessage(OBB_RUN_ACTION, action));
if (DEBUG_OBB)
Slog.i(TAG, "Send to OBB handler: " + action.toString());
}
@Override
public void unmountObb(String rawPath, boolean force, IObbActionListener token, int nonce) {
Preconditions.checkNotNull(rawPath, "rawPath cannot be null");
final ObbState existingState;
synchronized (mObbPathToStateMap) {
existingState = mObbPathToStateMap.get(rawPath);
}
if (existingState != null) {
// TODO: separate state object from request data
final int callingUid = Binder.getCallingUid();
final ObbState newState = new ObbState(
rawPath, existingState.canonicalPath, callingUid, token, nonce);
final ObbAction action = new UnmountObbAction(newState, force);
mObbActionHandler.sendMessage(mObbActionHandler.obtainMessage(OBB_RUN_ACTION, action));
if (DEBUG_OBB)
Slog.i(TAG, "Send to OBB handler: " + action.toString());
} else {
Slog.w(TAG, "Unknown OBB mount at " + rawPath);
}
}
@Override
public int getEncryptionState() {
mContext.enforceCallingOrSelfPermission(Manifest.permission.CRYPT_KEEPER,
"no permission to access the crypt keeper");
waitForReady();
final NativeDaemonEvent event;
try {
event = mConnector.execute("cryptfs", "cryptocomplete");
return Integer.parseInt(event.getMessage());
} catch (NumberFormatException e) {
// Bad result - unexpected.
Slog.w(TAG, "Unable to parse result from cryptfs cryptocomplete");
return ENCRYPTION_STATE_ERROR_UNKNOWN;
} catch (NativeDaemonConnectorException e) {
// Something bad happened.
Slog.w(TAG, "Error in communicating with cryptfs in validating");
return ENCRYPTION_STATE_ERROR_UNKNOWN;
}
}
private static String toHex(String password) {
if (password == null) {
return "";
}
byte[] bytes = password.getBytes(StandardCharsets.UTF_8);
return new String(HexEncoding.encode(bytes));
}
private static String fromHex(String hexPassword) throws IllegalArgumentException {
if (hexPassword == null) {
return null;
}
final byte[] bytes = HexEncoding.decode(hexPassword.toCharArray(), false);
return new String(bytes, StandardCharsets.UTF_8);
}
@Override
public int decryptStorage(String password) {
if (TextUtils.isEmpty(password)) {
throw new IllegalArgumentException("password cannot be empty");
}
mContext.enforceCallingOrSelfPermission(Manifest.permission.CRYPT_KEEPER,
"no permission to access the crypt keeper");
waitForReady();
if (DEBUG_EVENTS) {
Slog.i(TAG, "decrypting storage...");
}
final NativeDaemonEvent event;
try {
event = mConnector.execute("cryptfs", "checkpw", new SensitiveArg(toHex(password)));
final int code = Integer.parseInt(event.getMessage());
if (code == 0) {
// Decrypt was successful. Post a delayed message before restarting in order
// to let the UI to clear itself
mHandler.postDelayed(new Runnable() {
public void run() {
try {
mConnector.execute("cryptfs", "restart");
} catch (NativeDaemonConnectorException e) {
Slog.e(TAG, "problem executing in background", e);
}
}
}, 1000); // 1 second
}
return code;
} catch (NativeDaemonConnectorException e) {
// Decryption failed
return e.getCode();
}
}
public int encryptStorage(int type, String password) {
if (TextUtils.isEmpty(password) && type != StorageManager.CRYPT_TYPE_DEFAULT) {
throw new IllegalArgumentException("password cannot be empty");
}
mContext.enforceCallingOrSelfPermission(Manifest.permission.CRYPT_KEEPER,
"no permission to access the crypt keeper");
waitForReady();
if (DEBUG_EVENTS) {
Slog.i(TAG, "encrypting storage...");
}
try {
mConnector.execute("cryptfs", "enablecrypto", "inplace", CRYPTO_TYPES[type],
new SensitiveArg(toHex(password)));
} catch (NativeDaemonConnectorException e) {
// Encryption failed
return e.getCode();
}
return 0;
}
/** Set the password for encrypting the master key.
* @param type One of the CRYPTO_TYPE_XXX consts defined in StorageManager.
* @param password The password to set.
*/
public int changeEncryptionPassword(int type, String password) {
mContext.enforceCallingOrSelfPermission(Manifest.permission.CRYPT_KEEPER,
"no permission to access the crypt keeper");
waitForReady();
if (DEBUG_EVENTS) {
Slog.i(TAG, "changing encryption password...");
}
try {
NativeDaemonEvent event = mConnector.execute("cryptfs", "changepw", CRYPTO_TYPES[type],
new SensitiveArg(toHex(password)));
return Integer.parseInt(event.getMessage());
} catch (NativeDaemonConnectorException e) {
// Encryption failed
return e.getCode();
}
}
/**
* Validate a user-supplied password string with cryptfs
*/
@Override
public int verifyEncryptionPassword(String password) throws RemoteException {
// Only the system process is permitted to validate passwords
if (Binder.getCallingUid() != android.os.Process.SYSTEM_UID) {
throw new SecurityException("no permission to access the crypt keeper");
}
mContext.enforceCallingOrSelfPermission(Manifest.permission.CRYPT_KEEPER,
"no permission to access the crypt keeper");
if (TextUtils.isEmpty(password)) {
throw new IllegalArgumentException("password cannot be empty");
}
waitForReady();
if (DEBUG_EVENTS) {
Slog.i(TAG, "validating encryption password...");
}
final NativeDaemonEvent event;
try {
event = mConnector.execute("cryptfs", "verifypw", new SensitiveArg(toHex(password)));
Slog.i(TAG, "cryptfs verifypw => " + event.getMessage());
return Integer.parseInt(event.getMessage());
} catch (NativeDaemonConnectorException e) {
// Encryption failed
return e.getCode();
}
}
/**
* Get the type of encryption used to encrypt the master key.
* @return The type, one of the CRYPT_TYPE_XXX consts from StorageManager.
*/
@Override
public int getPasswordType() {
waitForReady();
final NativeDaemonEvent event;
try {
event = mConnector.execute("cryptfs", "getpwtype");
for (int i = 0; i < CRYPTO_TYPES.length; ++i) {
if (CRYPTO_TYPES[i].equals(event.getMessage()))
return i;
}
throw new IllegalStateException("unexpected return from cryptfs");
} catch (NativeDaemonConnectorException e) {
throw e.rethrowAsParcelableException();
}
}
/**
* Set a field in the crypto header.
* @param field field to set
* @param contents contents to set in field
*/
@Override
public void setField(String field, String contents) throws RemoteException {
waitForReady();
final NativeDaemonEvent event;
try {
event = mConnector.execute("cryptfs", "setfield", field, contents);
} catch (NativeDaemonConnectorException e) {
throw e.rethrowAsParcelableException();
}
}
/**
* Gets a field from the crypto header.
* @param field field to get
* @return contents of field
*/
@Override
public String getField(String field) throws RemoteException {
waitForReady();
final NativeDaemonEvent event;
try {
final String[] contents = NativeDaemonEvent.filterMessageList(
mConnector.executeForList("cryptfs", "getfield", field),
VoldResponseCode.CryptfsGetfieldResult);
String result = new String();
for (String content : contents) {
result += content;
}
return result;
} catch (NativeDaemonConnectorException e) {
throw e.rethrowAsParcelableException();
}
}
@Override
public String getPassword() throws RemoteException {
if (!isReady()) {
return new String();
}
final NativeDaemonEvent event;
try {
event = mConnector.execute("cryptfs", "getpw");
if ("-1".equals(event.getMessage())) {
// -1 equals no password
return null;
}
return fromHex(event.getMessage());
} catch (NativeDaemonConnectorException e) {
throw e.rethrowAsParcelableException();
} catch (IllegalArgumentException e) {
Slog.e(TAG, "Invalid response to getPassword");
return null;
}
}
@Override
public void clearPassword() throws RemoteException {
if (!isReady()) {
return;
}
final NativeDaemonEvent event;
try {
event = mConnector.execute("cryptfs", "clearpw");
} catch (NativeDaemonConnectorException e) {
throw e.rethrowAsParcelableException();
}
}
@Override
public int mkdirs(String callingPkg, String appPath) {
final int userId = UserHandle.getUserId(Binder.getCallingUid());
final UserEnvironment userEnv = new UserEnvironment(userId);
// Validate that reported package name belongs to caller
final AppOpsManager appOps = (AppOpsManager) mContext.getSystemService(
Context.APP_OPS_SERVICE);
appOps.checkPackage(Binder.getCallingUid(), callingPkg);
File appFile = null;
try {
appFile = new File(appPath).getCanonicalFile();
} catch (IOException e) {
Slog.e(TAG, "Failed to resolve " + appPath + ": " + e);
return -1;
}
// Try translating the app path into a vold path, but require that it
// belong to the calling package.
if (FileUtils.contains(userEnv.buildExternalStorageAppDataDirs(callingPkg), appFile) ||
FileUtils.contains(userEnv.buildExternalStorageAppObbDirs(callingPkg), appFile) ||
FileUtils.contains(userEnv.buildExternalStorageAppMediaDirs(callingPkg), appFile)) {
appPath = appFile.getAbsolutePath();
if (!appPath.endsWith("/")) {
appPath = appPath + "/";
}
try {
mConnector.execute("volume", "mkdirs", appPath);
return 0;
} catch (NativeDaemonConnectorException e) {
return e.getCode();
}
}
throw new SecurityException("Invalid mkdirs path: " + appFile);
}
@Override
public StorageVolume[] getVolumeList(int userId) {
final ArrayList<StorageVolume> res = new ArrayList<>();
boolean foundPrimary = false;
synchronized (mLock) {
for (int i = 0; i < mVolumes.size(); i++) {
final VolumeInfo vol = mVolumes.valueAt(i);
if (vol.isVisibleToUser(userId)) {
final StorageVolume userVol = vol.buildStorageVolume(mContext, userId);
if (vol.isPrimary()) {
res.add(0, userVol);
foundPrimary = true;
} else {
res.add(userVol);
}
}
}
}
if (!foundPrimary) {
Log.w(TAG, "No primary storage defined yet; hacking together a stub");
final boolean primaryPhysical = SystemProperties.getBoolean(
StorageManager.PROP_PRIMARY_PHYSICAL, false);
final String id = "stub_primary";
final File path = Environment.getLegacyExternalStorageDirectory();
final String description = mContext.getString(android.R.string.unknownName);
final boolean primary = true;
final boolean removable = primaryPhysical;
final boolean emulated = !primaryPhysical;
final long mtpReserveSize = 0L;
final boolean allowMassStorage = false;
final long maxFileSize = 0L;
final UserHandle owner = new UserHandle(userId);
final String uuid = null;
final String state = Environment.MEDIA_REMOVED;
res.add(0, new StorageVolume(id, MtpStorage.getStorageIdForIndex(0), path,
description, primary, removable, emulated, mtpReserveSize,
allowMassStorage, maxFileSize, owner, uuid, state));
}
return res.toArray(new StorageVolume[res.size()]);
}
@Override
public DiskInfo[] getDisks() {
synchronized (mLock) {
final DiskInfo[] res = new DiskInfo[mDisks.size()];
for (int i = 0; i < mDisks.size(); i++) {
res[i] = mDisks.valueAt(i);
}
return res;
}
}
@Override
public VolumeInfo[] getVolumes(int flags) {
if ((flags & StorageManager.FLAG_ALL_METADATA) != 0) {
// TODO: implement support for returning all metadata
throw new UnsupportedOperationException();
}
synchronized (mLock) {
final VolumeInfo[] res = new VolumeInfo[mVolumes.size()];
for (int i = 0; i < mVolumes.size(); i++) {
res[i] = mVolumes.valueAt(i);
}
return res;
}
}
private void addObbStateLocked(ObbState obbState) throws RemoteException {
final IBinder binder = obbState.getBinder();
List<ObbState> obbStates = mObbMounts.get(binder);
if (obbStates == null) {
obbStates = new ArrayList<ObbState>();
mObbMounts.put(binder, obbStates);
} else {
for (final ObbState o : obbStates) {
if (o.rawPath.equals(obbState.rawPath)) {
throw new IllegalStateException("Attempt to add ObbState twice. "
+ "This indicates an error in the MountService logic.");
}
}
}
obbStates.add(obbState);
try {
obbState.link();
} catch (RemoteException e) {
/*
* The binder died before we could link it, so clean up our state
* and return failure.
*/
obbStates.remove(obbState);
if (obbStates.isEmpty()) {
mObbMounts.remove(binder);
}
// Rethrow the error so mountObb can get it
throw e;
}
mObbPathToStateMap.put(obbState.rawPath, obbState);
}
private void removeObbStateLocked(ObbState obbState) {
final IBinder binder = obbState.getBinder();
final List<ObbState> obbStates = mObbMounts.get(binder);
if (obbStates != null) {
if (obbStates.remove(obbState)) {
obbState.unlink();
}
if (obbStates.isEmpty()) {
mObbMounts.remove(binder);
}
}
mObbPathToStateMap.remove(obbState.rawPath);
}
private class ObbActionHandler extends Handler {
private boolean mBound = false;
private final List<ObbAction> mActions = new LinkedList<ObbAction>();
ObbActionHandler(Looper l) {
super(l);
}
@Override
public void handleMessage(Message msg) {
switch (msg.what) {
case OBB_RUN_ACTION: {
final ObbAction action = (ObbAction) msg.obj;
if (DEBUG_OBB)
Slog.i(TAG, "OBB_RUN_ACTION: " + action.toString());
// If a bind was already initiated we don't really
// need to do anything. The pending install
// will be processed later on.
if (!mBound) {
// If this is the only one pending we might
// have to bind to the service again.
if (!connectToService()) {
Slog.e(TAG, "Failed to bind to media container service");
action.handleError();
return;
}
}
mActions.add(action);
break;
}
case OBB_MCS_BOUND: {
if (DEBUG_OBB)
Slog.i(TAG, "OBB_MCS_BOUND");
if (msg.obj != null) {
mContainerService = (IMediaContainerService) msg.obj;
}
if (mContainerService == null) {
// Something seriously wrong. Bail out
Slog.e(TAG, "Cannot bind to media container service");
for (ObbAction action : mActions) {
// Indicate service bind error
action.handleError();
}
mActions.clear();
} else if (mActions.size() > 0) {
final ObbAction action = mActions.get(0);
if (action != null) {
action.execute(this);
}
} else {
// Should never happen ideally.
Slog.w(TAG, "Empty queue");
}
break;
}
case OBB_MCS_RECONNECT: {
if (DEBUG_OBB)
Slog.i(TAG, "OBB_MCS_RECONNECT");
if (mActions.size() > 0) {
if (mBound) {
disconnectService();
}
if (!connectToService()) {
Slog.e(TAG, "Failed to bind to media container service");
for (ObbAction action : mActions) {
// Indicate service bind error
action.handleError();
}
mActions.clear();
}
}
break;
}
case OBB_MCS_UNBIND: {
if (DEBUG_OBB)
Slog.i(TAG, "OBB_MCS_UNBIND");
// Delete pending install
if (mActions.size() > 0) {
mActions.remove(0);
}
if (mActions.size() == 0) {
if (mBound) {
disconnectService();
}
} else {
// There are more pending requests in queue.
// Just post MCS_BOUND message to trigger processing
// of next pending install.
mObbActionHandler.sendEmptyMessage(OBB_MCS_BOUND);
}
break;
}
case OBB_FLUSH_MOUNT_STATE: {
final String path = (String) msg.obj;
if (DEBUG_OBB)
Slog.i(TAG, "Flushing all OBB state for path " + path);
synchronized (mObbMounts) {
final List<ObbState> obbStatesToRemove = new LinkedList<ObbState>();
final Iterator<ObbState> i = mObbPathToStateMap.values().iterator();
while (i.hasNext()) {
final ObbState state = i.next();
/*
* If this entry's source file is in the volume path
* that got unmounted, remove it because it's no
* longer valid.
*/
if (state.canonicalPath.startsWith(path)) {
obbStatesToRemove.add(state);
}
}
for (final ObbState obbState : obbStatesToRemove) {
if (DEBUG_OBB)
Slog.i(TAG, "Removing state for " + obbState.rawPath);
removeObbStateLocked(obbState);
try {
obbState.token.onObbResult(obbState.rawPath, obbState.nonce,
OnObbStateChangeListener.UNMOUNTED);
} catch (RemoteException e) {
Slog.i(TAG, "Couldn't send unmount notification for OBB: "
+ obbState.rawPath);
}
}
}
break;
}
}
}
private boolean connectToService() {
if (DEBUG_OBB)
Slog.i(TAG, "Trying to bind to DefaultContainerService");
Intent service = new Intent().setComponent(DEFAULT_CONTAINER_COMPONENT);
if (mContext.bindService(service, mDefContainerConn, Context.BIND_AUTO_CREATE)) {
mBound = true;
return true;
}
return false;
}
private void disconnectService() {
mContainerService = null;
mBound = false;
mContext.unbindService(mDefContainerConn);
}
}
abstract class ObbAction {
private static final int MAX_RETRIES = 3;
private int mRetries;
ObbState mObbState;
ObbAction(ObbState obbState) {
mObbState = obbState;
}
public void execute(ObbActionHandler handler) {
try {
if (DEBUG_OBB)
Slog.i(TAG, "Starting to execute action: " + toString());
mRetries++;
if (mRetries > MAX_RETRIES) {
Slog.w(TAG, "Failed to invoke remote methods on default container service. Giving up");
mObbActionHandler.sendEmptyMessage(OBB_MCS_UNBIND);
handleError();
return;
} else {
handleExecute();
if (DEBUG_OBB)
Slog.i(TAG, "Posting install MCS_UNBIND");
mObbActionHandler.sendEmptyMessage(OBB_MCS_UNBIND);
}
} catch (RemoteException e) {
if (DEBUG_OBB)
Slog.i(TAG, "Posting install MCS_RECONNECT");
mObbActionHandler.sendEmptyMessage(OBB_MCS_RECONNECT);
} catch (Exception e) {
if (DEBUG_OBB)
Slog.d(TAG, "Error handling OBB action", e);
handleError();
mObbActionHandler.sendEmptyMessage(OBB_MCS_UNBIND);
}
}
abstract void handleExecute() throws RemoteException, IOException;
abstract void handleError();
protected ObbInfo getObbInfo() throws IOException {
ObbInfo obbInfo;
try {
obbInfo = mContainerService.getObbInfo(mObbState.ownerPath);
} catch (RemoteException e) {
Slog.d(TAG, "Couldn't call DefaultContainerService to fetch OBB info for "
+ mObbState.ownerPath);
obbInfo = null;
}
if (obbInfo == null) {
throw new IOException("Couldn't read OBB file: " + mObbState.ownerPath);
}
return obbInfo;
}
protected void sendNewStatusOrIgnore(int status) {
if (mObbState == null || mObbState.token == null) {
return;
}
try {
mObbState.token.onObbResult(mObbState.rawPath, mObbState.nonce, status);
} catch (RemoteException e) {
Slog.w(TAG, "MountServiceListener went away while calling onObbStateChanged");
}
}
}
class MountObbAction extends ObbAction {
private final String mKey;
private final int mCallingUid;
MountObbAction(ObbState obbState, String key, int callingUid) {
super(obbState);
mKey = key;
mCallingUid = callingUid;
}
@Override
public void handleExecute() throws IOException, RemoteException {
waitForReady();
warnOnNotMounted();
final ObbInfo obbInfo = getObbInfo();
if (!isUidOwnerOfPackageOrSystem(obbInfo.packageName, mCallingUid)) {
Slog.w(TAG, "Denied attempt to mount OBB " + obbInfo.filename
+ " which is owned by " + obbInfo.packageName);
sendNewStatusOrIgnore(OnObbStateChangeListener.ERROR_PERMISSION_DENIED);
return;
}
final boolean isMounted;
synchronized (mObbMounts) {
isMounted = mObbPathToStateMap.containsKey(mObbState.rawPath);
}
if (isMounted) {
Slog.w(TAG, "Attempt to mount OBB which is already mounted: " + obbInfo.filename);
sendNewStatusOrIgnore(OnObbStateChangeListener.ERROR_ALREADY_MOUNTED);
return;
}
final String hashedKey;
if (mKey == null) {
hashedKey = "none";
} else {
try {
SecretKeyFactory factory = SecretKeyFactory.getInstance("PBKDF2WithHmacSHA1");
KeySpec ks = new PBEKeySpec(mKey.toCharArray(), obbInfo.salt,
PBKDF2_HASH_ROUNDS, CRYPTO_ALGORITHM_KEY_SIZE);
SecretKey key = factory.generateSecret(ks);
BigInteger bi = new BigInteger(key.getEncoded());
hashedKey = bi.toString(16);
} catch (NoSuchAlgorithmException e) {
Slog.e(TAG, "Could not load PBKDF2 algorithm", e);
sendNewStatusOrIgnore(OnObbStateChangeListener.ERROR_INTERNAL);
return;
} catch (InvalidKeySpecException e) {
Slog.e(TAG, "Invalid key spec when loading PBKDF2 algorithm", e);
sendNewStatusOrIgnore(OnObbStateChangeListener.ERROR_INTERNAL);
return;
}
}
int rc = StorageResultCode.OperationSucceeded;
try {
mConnector.execute("obb", "mount", mObbState.voldPath, new SensitiveArg(hashedKey),
mObbState.ownerGid);
} catch (NativeDaemonConnectorException e) {
int code = e.getCode();
if (code != VoldResponseCode.OpFailedStorageBusy) {
rc = StorageResultCode.OperationFailedInternalError;
}
}
if (rc == StorageResultCode.OperationSucceeded) {
if (DEBUG_OBB)
Slog.d(TAG, "Successfully mounted OBB " + mObbState.voldPath);
synchronized (mObbMounts) {
addObbStateLocked(mObbState);
}
sendNewStatusOrIgnore(OnObbStateChangeListener.MOUNTED);
} else {
Slog.e(TAG, "Couldn't mount OBB file: " + rc);
sendNewStatusOrIgnore(OnObbStateChangeListener.ERROR_COULD_NOT_MOUNT);
}
}
@Override
public void handleError() {
sendNewStatusOrIgnore(OnObbStateChangeListener.ERROR_INTERNAL);
}
@Override
public String toString() {
StringBuilder sb = new StringBuilder();
sb.append("MountObbAction{");
sb.append(mObbState);
sb.append('}');
return sb.toString();
}
}
class UnmountObbAction extends ObbAction {
private final boolean mForceUnmount;
UnmountObbAction(ObbState obbState, boolean force) {
super(obbState);
mForceUnmount = force;
}
@Override
public void handleExecute() throws IOException {
waitForReady();
warnOnNotMounted();
final ObbInfo obbInfo = getObbInfo();
final ObbState existingState;
synchronized (mObbMounts) {
existingState = mObbPathToStateMap.get(mObbState.rawPath);
}
if (existingState == null) {
sendNewStatusOrIgnore(OnObbStateChangeListener.ERROR_NOT_MOUNTED);
return;
}
if (existingState.ownerGid != mObbState.ownerGid) {
Slog.w(TAG, "Permission denied attempting to unmount OBB " + existingState.rawPath
+ " (owned by GID " + existingState.ownerGid + ")");
sendNewStatusOrIgnore(OnObbStateChangeListener.ERROR_PERMISSION_DENIED);
return;
}
int rc = StorageResultCode.OperationSucceeded;
try {
final Command cmd = new Command("obb", "unmount", mObbState.voldPath);
if (mForceUnmount) {
cmd.appendArg("force");
}
mConnector.execute(cmd);
} catch (NativeDaemonConnectorException e) {
int code = e.getCode();
if (code == VoldResponseCode.OpFailedStorageBusy) {
rc = StorageResultCode.OperationFailedStorageBusy;
} else if (code == VoldResponseCode.OpFailedStorageNotFound) {
// If it's not mounted then we've already won.
rc = StorageResultCode.OperationSucceeded;
} else {
rc = StorageResultCode.OperationFailedInternalError;
}
}
if (rc == StorageResultCode.OperationSucceeded) {
synchronized (mObbMounts) {
removeObbStateLocked(existingState);
}
sendNewStatusOrIgnore(OnObbStateChangeListener.UNMOUNTED);
} else {
Slog.w(TAG, "Could not unmount OBB: " + existingState);
sendNewStatusOrIgnore(OnObbStateChangeListener.ERROR_COULD_NOT_UNMOUNT);
}
}
@Override
public void handleError() {
sendNewStatusOrIgnore(OnObbStateChangeListener.ERROR_INTERNAL);
}
@Override
public String toString() {
StringBuilder sb = new StringBuilder();
sb.append("UnmountObbAction{");
sb.append(mObbState);
sb.append(",force=");
sb.append(mForceUnmount);
sb.append('}');
return sb.toString();
}
}
@VisibleForTesting
public static String buildObbPath(final String canonicalPath, int userId, boolean forVold) {
// TODO: allow caller to provide Environment for full testing
// TODO: extend to support OBB mounts on secondary external storage
// Only adjust paths when storage is emulated
if (!Environment.isExternalStorageEmulated()) {
return canonicalPath;
}
String path = canonicalPath.toString();
// First trim off any external storage prefix
final UserEnvironment userEnv = new UserEnvironment(userId);
// /storage/emulated/0
final String externalPath = userEnv.getExternalStorageDirectory().getAbsolutePath();
// /storage/emulated_legacy
final String legacyExternalPath = Environment.getLegacyExternalStorageDirectory()
.getAbsolutePath();
if (path.startsWith(externalPath)) {
path = path.substring(externalPath.length() + 1);
} else if (path.startsWith(legacyExternalPath)) {
path = path.substring(legacyExternalPath.length() + 1);
} else {
return canonicalPath;
}
// Handle special OBB paths on emulated storage
final String obbPath = "Android/obb";
if (path.startsWith(obbPath)) {
path = path.substring(obbPath.length() + 1);
final UserEnvironment ownerEnv = new UserEnvironment(UserHandle.USER_OWNER);
return new File(ownerEnv.buildExternalStorageAndroidObbDirs()[0], path)
.getAbsolutePath();
}
// Handle normal external storage paths
return new File(userEnv.getExternalStorageDirectory(), path).getAbsolutePath();
}
private static class Callbacks extends Handler {
private static final int MSG_STORAGE_STATE_CHANGED = 1;
private static final int MSG_VOLUME_STATE_CHANGED = 2;
private static final int MSG_VOLUME_METADATA_CHANGED = 3;
private final RemoteCallbackList<IMountServiceListener>
mCallbacks = new RemoteCallbackList<>();
public Callbacks(Looper looper) {
super(looper);
}
public void register(IMountServiceListener callback) {
mCallbacks.register(callback);
}
public void unregister(IMountServiceListener callback) {
mCallbacks.unregister(callback);
}
@Override
public void handleMessage(Message msg) {
final SomeArgs args = (SomeArgs) msg.obj;
final int n = mCallbacks.beginBroadcast();
for (int i = 0; i < n; i++) {
final IMountServiceListener callback = mCallbacks.getBroadcastItem(i);
try {
invokeCallback(callback, msg.what, args);
} catch (RemoteException ignored) {
}
}
mCallbacks.finishBroadcast();
args.recycle();
}
private void invokeCallback(IMountServiceListener callback, int what, SomeArgs args)
throws RemoteException {
switch (what) {
case MSG_STORAGE_STATE_CHANGED: {
callback.onStorageStateChanged((String) args.arg1, (String) args.arg2,
(String) args.arg3);
break;
}
case MSG_VOLUME_STATE_CHANGED: {
callback.onVolumeStateChanged((VolumeInfo) args.arg1, args.argi2, args.argi3);
break;
}
case MSG_VOLUME_METADATA_CHANGED: {
callback.onVolumeMetadataChanged((VolumeInfo) args.arg1);
break;
}
}
}
private void notifyStorageStateChanged(String path, String oldState, String newState) {
final SomeArgs args = SomeArgs.obtain();
args.arg1 = path;
args.arg2 = oldState;
args.arg3 = newState;
obtainMessage(MSG_STORAGE_STATE_CHANGED, args).sendToTarget();
}
private void notifyVolumeStateChanged(VolumeInfo vol, int oldState, int newState) {
final SomeArgs args = SomeArgs.obtain();
args.arg1 = vol;
args.argi2 = oldState;
args.argi3 = newState;
obtainMessage(MSG_VOLUME_STATE_CHANGED, args).sendToTarget();
}
private void notifyVolumeMetadataChanged(VolumeInfo vol) {
final SomeArgs args = SomeArgs.obtain();
args.arg1 = vol;
obtainMessage(MSG_VOLUME_METADATA_CHANGED, args).sendToTarget();
}
}
@Override
protected void dump(FileDescriptor fd, PrintWriter writer, String[] args) {
mContext.enforceCallingOrSelfPermission(android.Manifest.permission.DUMP, TAG);
final IndentingPrintWriter pw = new IndentingPrintWriter(writer, " ", 160);
synchronized (mObbMounts) {
pw.println("mObbMounts:");
pw.increaseIndent();
final Iterator<Entry<IBinder, List<ObbState>>> binders = mObbMounts.entrySet()
.iterator();
while (binders.hasNext()) {
Entry<IBinder, List<ObbState>> e = binders.next();
pw.println(e.getKey() + ":");
pw.increaseIndent();
final List<ObbState> obbStates = e.getValue();
for (final ObbState obbState : obbStates) {
pw.println(obbState);
}
pw.decreaseIndent();
}
pw.decreaseIndent();
pw.println();
pw.println("mObbPathToStateMap:");
pw.increaseIndent();
final Iterator<Entry<String, ObbState>> maps = mObbPathToStateMap.entrySet().iterator();
while (maps.hasNext()) {
final Entry<String, ObbState> e = maps.next();
pw.print(e.getKey());
pw.print(" -> ");
pw.println(e.getValue());
}
pw.decreaseIndent();
}
synchronized (mLock) {
pw.println();
pw.println("Disks:");
pw.increaseIndent();
for (int i = 0; i < mDisks.size(); i++) {
final DiskInfo disk = mDisks.valueAt(i);
disk.dump(pw);
}
pw.decreaseIndent();
pw.println();
pw.println("Volumes:");
pw.increaseIndent();
for (int i = 0; i < mVolumes.size(); i++) {
final VolumeInfo vol = mVolumes.valueAt(i);
vol.dump(pw);
}
pw.decreaseIndent();
pw.println();
pw.println("Metadata:");
pw.increaseIndent();
for (int i = 0; i < mMetadata.size(); i++) {
final VolumeMetadata meta = mMetadata.valueAt(i);
meta.dump(pw);
}
pw.decreaseIndent();
}
pw.println();
pw.println("mConnection:");
pw.increaseIndent();
mConnector.dump(fd, pw, args);
pw.decreaseIndent();
SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
pw.println();
pw.print("Last maintenance: ");
pw.println(sdf.format(new Date(mLastMaintenance)));
}
/** {@inheritDoc} */
@Override
public void monitor() {
if (mConnector != null) {
mConnector.monitor();
}
}
}
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