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android_frameworks_base/services/java/com/android/server/BackupManagerService.java
Christopher Tate 21ab6a5bdb Disallow concurrent backups; consult transport requestBackupTime() 
* We now check for in-progress backups when asked to perform one, and don't
  bother firing off another one concurrently (nor do we adjust the scheduling;
  after all, someone asked to do a backup "now" and we're doing one, so we are
  in line with expectations).  We also defer backup passes while a restore is
  in flight, and abort attempts to perform a restore during a backup pass.

* When a backup attempt fails, we now ask the transport how far in the future we
  should put our retry.  Previously we were simply not bothering to consult with
  the transport, so we would wind up retrying backup while network connectivity
  was known to be down, etc.

Change-Id: Ic7758010b74e06e90c50d46b7b0dd01b17af7c90
2009-09-24 19:54:46 -07:00

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/*
* Copyright (C) 2009 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 android.app.ActivityManagerNative;
import android.app.AlarmManager;
import android.app.IActivityManager;
import android.app.IApplicationThread;
import android.app.IBackupAgent;
import android.app.PendingIntent;
import android.content.BroadcastReceiver;
import android.content.ComponentName;
import android.content.Context;
import android.content.Intent;
import android.content.IntentFilter;
import android.content.ServiceConnection;
import android.content.pm.ApplicationInfo;
import android.content.pm.IPackageDataObserver;
import android.content.pm.PackageInfo;
import android.content.pm.PackageManager.NameNotFoundException;
import android.content.pm.PackageManager;
import android.content.pm.Signature;
import android.net.Uri;
import android.provider.Settings;
import android.os.Binder;
import android.os.Bundle;
import android.os.Environment;
import android.os.Handler;
import android.os.IBinder;
import android.os.Message;
import android.os.ParcelFileDescriptor;
import android.os.PowerManager;
import android.os.Process;
import android.os.RemoteException;
import android.os.SystemClock;
import android.util.EventLog;
import android.util.Log;
import android.util.SparseArray;
import android.backup.IBackupManager;
import android.backup.IRestoreObserver;
import android.backup.IRestoreSession;
import android.backup.RestoreSet;
import com.android.internal.backup.BackupConstants;
import com.android.internal.backup.LocalTransport;
import com.android.internal.backup.IBackupTransport;
import com.android.server.PackageManagerBackupAgent;
import com.android.server.PackageManagerBackupAgent.Metadata;
import java.io.EOFException;
import java.io.File;
import java.io.FileDescriptor;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.PrintWriter;
import java.io.RandomAccessFile;
import java.lang.String;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.HashSet;
import java.util.List;
import java.util.Map;
class BackupManagerService extends IBackupManager.Stub {
private static final String TAG = "BackupManagerService";
private static final boolean DEBUG = true;
// How often we perform a backup pass. Privileged external callers can
// trigger an immediate pass.
private static final long BACKUP_INTERVAL = AlarmManager.INTERVAL_HOUR;
// The amount of time between the initial provisioning of the device and
// the first backup pass.
private static final long FIRST_BACKUP_INTERVAL = 12 * AlarmManager.INTERVAL_HOUR;
private static final String RUN_BACKUP_ACTION = "android.backup.intent.RUN";
private static final String RUN_INITIALIZE_ACTION = "android.backup.intent.INIT";
private static final String RUN_CLEAR_ACTION = "android.backup.intent.CLEAR";
private static final int MSG_RUN_BACKUP = 1;
private static final int MSG_RUN_FULL_BACKUP = 2;
private static final int MSG_RUN_RESTORE = 3;
private static final int MSG_RUN_CLEAR = 4;
private static final int MSG_RUN_INITIALIZE = 5;
// Event tags -- see system/core/logcat/event-log-tags
private static final int BACKUP_DATA_CHANGED_EVENT = 2820;
private static final int BACKUP_START_EVENT = 2821;
private static final int BACKUP_TRANSPORT_FAILURE_EVENT = 2822;
private static final int BACKUP_AGENT_FAILURE_EVENT = 2823;
private static final int BACKUP_PACKAGE_EVENT = 2824;
private static final int BACKUP_SUCCESS_EVENT = 2825;
private static final int BACKUP_RESET_EVENT = 2826;
private static final int RESTORE_START_EVENT = 2830;
private static final int RESTORE_TRANSPORT_FAILURE_EVENT = 2831;
private static final int RESTORE_AGENT_FAILURE_EVENT = 2832;
private static final int RESTORE_PACKAGE_EVENT = 2833;
private static final int RESTORE_SUCCESS_EVENT = 2834;
// Timeout interval for deciding that a bind or clear-data has taken too long
static final long TIMEOUT_INTERVAL = 10 * 1000;
private Context mContext;
private PackageManager mPackageManager;
private IActivityManager mActivityManager;
private PowerManager mPowerManager;
private AlarmManager mAlarmManager;
boolean mEnabled; // access to this is synchronized on 'this'
boolean mProvisioned;
PowerManager.WakeLock mWakelock;
final BackupHandler mBackupHandler = new BackupHandler();
PendingIntent mRunBackupIntent, mRunInitIntent;
BroadcastReceiver mRunBackupReceiver, mRunInitReceiver;
// map UIDs to the set of backup client services within that UID's app set
final SparseArray<HashSet<ApplicationInfo>> mBackupParticipants
= new SparseArray<HashSet<ApplicationInfo>>();
// set of backup services that have pending changes
class BackupRequest {
public ApplicationInfo appInfo;
public boolean fullBackup;
BackupRequest(ApplicationInfo app, boolean isFull) {
appInfo = app;
fullBackup = isFull;
}
public String toString() {
return "BackupRequest{app=" + appInfo + " full=" + fullBackup + "}";
}
}
// Backups that we haven't started yet.
HashMap<ApplicationInfo,BackupRequest> mPendingBackups
= new HashMap<ApplicationInfo,BackupRequest>();
// Pseudoname that we use for the Package Manager metadata "package"
static final String PACKAGE_MANAGER_SENTINEL = "@pm@";
// locking around the pending-backup management
final Object mQueueLock = new Object();
// The thread performing the sequence of queued backups binds to each app's agent
// in succession. Bind notifications are asynchronously delivered through the
// Activity Manager; use this lock object to signal when a requested binding has
// completed.
final Object mAgentConnectLock = new Object();
IBackupAgent mConnectedAgent;
volatile boolean mConnecting;
volatile boolean mBackupOrRestoreInProgress = false;
// A similar synchronicity mechanism around clearing apps' data for restore
final Object mClearDataLock = new Object();
volatile boolean mClearingData;
// Transport bookkeeping
final HashMap<String,IBackupTransport> mTransports
= new HashMap<String,IBackupTransport>();
String mCurrentTransport;
IBackupTransport mLocalTransport, mGoogleTransport;
RestoreSession mActiveRestoreSession;
class RestoreParams {
public IBackupTransport transport;
public IRestoreObserver observer;
public long token;
RestoreParams(IBackupTransport _transport, IRestoreObserver _obs, long _token) {
transport = _transport;
observer = _obs;
token = _token;
}
}
class ClearParams {
public IBackupTransport transport;
public PackageInfo packageInfo;
ClearParams(IBackupTransport _transport, PackageInfo _info) {
transport = _transport;
packageInfo = _info;
}
}
// Where we keep our journal files and other bookkeeping
File mBaseStateDir;
File mDataDir;
File mJournalDir;
File mJournal;
RandomAccessFile mJournalStream;
// Keep a log of all the apps we've ever backed up
private File mEverStored;
private RandomAccessFile mEverStoredStream;
HashSet<String> mEverStoredApps = new HashSet<String>();
// Persistently track the need to do a full init
static final String INIT_SENTINEL_FILE_NAME = "_need_init_";
HashSet<String> mPendingInits = new HashSet<String>(); // transport names
volatile boolean mInitInProgress = false;
public BackupManagerService(Context context) {
mContext = context;
mPackageManager = context.getPackageManager();
mActivityManager = ActivityManagerNative.getDefault();
mAlarmManager = (AlarmManager) context.getSystemService(Context.ALARM_SERVICE);
mPowerManager = (PowerManager) context.getSystemService(Context.POWER_SERVICE);
// Set up our bookkeeping
boolean areEnabled = Settings.Secure.getInt(context.getContentResolver(),
Settings.Secure.BACKUP_ENABLED, 0) != 0;
mProvisioned = Settings.Secure.getInt(context.getContentResolver(),
Settings.Secure.BACKUP_PROVISIONED, 0) != 0;
mBaseStateDir = new File(Environment.getDataDirectory(), "backup");
mDataDir = Environment.getDownloadCacheDirectory();
// Alarm receivers for scheduled backups & initialization operations
mRunBackupReceiver = new RunBackupReceiver();
IntentFilter filter = new IntentFilter();
filter.addAction(RUN_BACKUP_ACTION);
context.registerReceiver(mRunBackupReceiver, filter,
android.Manifest.permission.BACKUP, null);
mRunInitReceiver = new RunInitializeReceiver();
filter = new IntentFilter();
filter.addAction(RUN_INITIALIZE_ACTION);
context.registerReceiver(mRunInitReceiver, filter,
android.Manifest.permission.BACKUP, null);
Intent backupIntent = new Intent(RUN_BACKUP_ACTION);
backupIntent.addFlags(Intent.FLAG_RECEIVER_REGISTERED_ONLY);
mRunBackupIntent = PendingIntent.getBroadcast(context, MSG_RUN_BACKUP, backupIntent, 0);
Intent initIntent = new Intent(RUN_INITIALIZE_ACTION);
backupIntent.addFlags(Intent.FLAG_RECEIVER_REGISTERED_ONLY);
mRunInitIntent = PendingIntent.getBroadcast(context, MSG_RUN_INITIALIZE, initIntent, 0);
// Set up the backup-request journaling
mJournalDir = new File(mBaseStateDir, "pending");
mJournalDir.mkdirs(); // creates mBaseStateDir along the way
makeJournalLocked(); // okay because no other threads are running yet
// Set up the various sorts of package tracking we do
initPackageTracking();
// Build our mapping of uid to backup client services. This implicitly
// schedules a backup pass on the Package Manager metadata the first
// time anything needs to be backed up.
synchronized (mBackupParticipants) {
addPackageParticipantsLocked(null);
}
// Set up our transport options and initialize the default transport
// TODO: Have transports register themselves somehow?
// TODO: Don't create transports that we don't need to?
mLocalTransport = new LocalTransport(context); // This is actually pretty cheap
ComponentName localName = new ComponentName(context, LocalTransport.class);
registerTransport(localName.flattenToShortString(), mLocalTransport);
mGoogleTransport = null;
mCurrentTransport = Settings.Secure.getString(context.getContentResolver(),
Settings.Secure.BACKUP_TRANSPORT);
if ("".equals(mCurrentTransport)) {
mCurrentTransport = null;
}
if (DEBUG) Log.v(TAG, "Starting with transport " + mCurrentTransport);
// Attach to the Google backup transport. When this comes up, it will set
// itself as the current transport because we explicitly reset mCurrentTransport
// to null.
Intent intent = new Intent().setComponent(new ComponentName(
"com.google.android.backup",
"com.google.android.backup.BackupTransportService"));
context.bindService(intent, mGoogleConnection, Context.BIND_AUTO_CREATE);
// Now that we know about valid backup participants, parse any
// leftover journal files into the pending backup set
parseLeftoverJournals();
// Power management
mWakelock = mPowerManager.newWakeLock(PowerManager.PARTIAL_WAKE_LOCK, "backup");
// Start the backup passes going
setBackupEnabled(areEnabled);
}
private class RunBackupReceiver extends BroadcastReceiver {
public void onReceive(Context context, Intent intent) {
if (RUN_BACKUP_ACTION.equals(intent.getAction())) {
synchronized (mQueueLock) {
if (mPendingInits.size() > 0) {
// If there are pending init operations, we process those
// and then settle into the usual periodic backup schedule.
if (DEBUG) Log.v(TAG, "Init pending at scheduled backup");
try {
mAlarmManager.cancel(mRunInitIntent);
mRunInitIntent.send();
} catch (PendingIntent.CanceledException ce) {
Log.e(TAG, "Run init intent cancelled");
// can't really do more than bail here
}
} else {
// Don't run backups now if we're disabled, not yet
// fully set up, in the middle of a backup already,
// or racing with an initialize pass.
if (mEnabled && mProvisioned
&& !mBackupOrRestoreInProgress && !mInitInProgress) {
if (DEBUG) Log.v(TAG, "Running a backup pass");
mBackupOrRestoreInProgress = true;
// Acquire the wakelock and pass it to the backup thread. it will
// be released once backup concludes.
mWakelock.acquire();
Message msg = mBackupHandler.obtainMessage(MSG_RUN_BACKUP);
mBackupHandler.sendMessage(msg);
} else {
Log.w(TAG, "Backup pass but e=" + mEnabled + " p=" + mProvisioned
+ " b=" + mBackupOrRestoreInProgress + " i=" + mInitInProgress);
}
}
}
}
}
}
private class RunInitializeReceiver extends BroadcastReceiver {
public void onReceive(Context context, Intent intent) {
if (RUN_INITIALIZE_ACTION.equals(intent.getAction())) {
synchronized (mQueueLock) {
if (DEBUG) Log.v(TAG, "Running a device init");
mInitInProgress = true;
// Acquire the wakelock and pass it to the init thread. it will
// be released once init concludes.
mWakelock.acquire();
Message msg = mBackupHandler.obtainMessage(MSG_RUN_INITIALIZE);
mBackupHandler.sendMessage(msg);
}
}
}
}
private void initPackageTracking() {
if (DEBUG) Log.v(TAG, "Initializing package tracking");
// Keep a log of what apps we've ever backed up. Because we might have
// rebooted in the middle of an operation that was removing something from
// this log, we sanity-check its contents here and reconstruct it.
mEverStored = new File(mBaseStateDir, "processed");
File tempProcessedFile = new File(mBaseStateDir, "processed.new");
try {
// If there are previous contents, parse them out then start a new
// file to continue the recordkeeping.
if (mEverStored.exists()) {
RandomAccessFile temp = new RandomAccessFile(tempProcessedFile, "rw");
mEverStoredStream = new RandomAccessFile(mEverStored, "r");
// parse its existing contents
mEverStoredStream.seek(0);
temp.seek(0);
try {
while (true) {
PackageInfo info;
String pkg = mEverStoredStream.readUTF();
try {
info = mPackageManager.getPackageInfo(pkg, 0);
mEverStoredApps.add(pkg);
temp.writeUTF(pkg);
if (DEBUG) Log.v(TAG, " + " + pkg);
} catch (NameNotFoundException e) {
// nope, this package was uninstalled; don't include it
if (DEBUG) Log.v(TAG, " - " + pkg);
}
}
} catch (EOFException e) {
// now we're at EOF
}
// Once we've rewritten the backup history log, atomically replace the
// old one with the new one then reopen the file for continuing use.
temp.close();
mEverStoredStream.close();
tempProcessedFile.renameTo(mEverStored);
}
// This will create the file if it doesn't exist
mEverStoredStream = new RandomAccessFile(mEverStored, "rwd");
mEverStoredStream.seek(mEverStoredStream.length());
} catch (IOException e) {
Log.e(TAG, "Unable to open known-stored file!");
mEverStoredStream = null;
}
// If we were in the middle of removing something from the ever-backed-up
// file, there might be a transient "processed.new" file still present.
// We've reconstructed a coherent state at this point though, so we can
// safely discard that file now.
if (tempProcessedFile.exists()) {
tempProcessedFile.delete();
}
// Register for broadcasts about package install, etc., so we can
// update the provider list.
IntentFilter filter = new IntentFilter();
filter.addAction(Intent.ACTION_PACKAGE_ADDED);
filter.addAction(Intent.ACTION_PACKAGE_REMOVED);
filter.addDataScheme("package");
mContext.registerReceiver(mBroadcastReceiver, filter);
}
private void makeJournalLocked() {
try {
mJournal = File.createTempFile("journal", null, mJournalDir);
mJournalStream = new RandomAccessFile(mJournal, "rwd");
} catch (IOException e) {
Log.e(TAG, "Unable to write backup journals");
mJournal = null;
mJournalStream = null;
}
}
private void parseLeftoverJournals() {
if (mJournal != null) {
File[] allJournals = mJournalDir.listFiles();
for (File f : allJournals) {
if (f.compareTo(mJournal) != 0) {
// This isn't the current journal, so it must be a leftover. Read
// out the package names mentioned there and schedule them for
// backup.
try {
Log.i(TAG, "Found stale backup journal, scheduling:");
RandomAccessFile in = new RandomAccessFile(f, "r");
while (true) {
String packageName = in.readUTF();
Log.i(TAG, " + " + packageName);
dataChanged(packageName);
}
} catch (EOFException e) {
// no more data; we're done
} catch (Exception e) {
// can't read it or other error; just skip it
} finally {
// close/delete the file
f.delete();
}
}
}
}
}
// Maintain persistent state around whether need to do an initialize operation.
// Must be called with the queue lock held.
void recordInitPendingLocked(boolean isPending, String transportName) {
if (DEBUG) Log.i(TAG, "recordInitPendingLocked: " + isPending
+ " on transport " + transportName);
try {
IBackupTransport transport = getTransport(transportName);
String transportDirName = transport.transportDirName();
File stateDir = new File(mBaseStateDir, transportDirName);
File initPendingFile = new File(stateDir, INIT_SENTINEL_FILE_NAME);
if (isPending) {
// We need an init before we can proceed with sending backup data.
// Record that with an entry in our set of pending inits, as well as
// journaling it via creation of a sentinel file.
mPendingInits.add(transportName);
try {
(new FileOutputStream(initPendingFile)).close();
} catch (IOException ioe) {
// Something is badly wrong with our permissions; just try to move on
}
} else {
// No more initialization needed; wipe the journal and reset our state.
initPendingFile.delete();
mPendingInits.remove(transportName);
}
} catch (RemoteException e) {
// can't happen; the transport is local
}
}
// Reset all of our bookkeeping, in response to having been told that
// the backend data has been wiped [due to idle expiry, for example],
// so we must re-upload all saved settings.
void resetBackupState(File stateFileDir) {
synchronized (mQueueLock) {
// Wipe the "what we've ever backed up" tracking
try {
// close the ever-stored journal...
if (mEverStoredStream != null) {
mEverStoredStream.close();
}
// ... so we can delete it and start over
mEverStored.delete();
mEverStoredStream = new RandomAccessFile(mEverStored, "rwd");
} catch (IOException e) {
Log.e(TAG, "Unable to open known-stored file!");
mEverStoredStream = null;
}
mEverStoredApps.clear();
// Remove all the state files
for (File sf : stateFileDir.listFiles()) {
// ... but don't touch the needs-init sentinel
if (!sf.getName().equals(INIT_SENTINEL_FILE_NAME)) {
sf.delete();
}
}
// Enqueue a new backup of every participant
int N = mBackupParticipants.size();
for (int i=0; i<N; i++) {
int uid = mBackupParticipants.keyAt(i);
HashSet<ApplicationInfo> participants = mBackupParticipants.valueAt(i);
for (ApplicationInfo app: participants) {
try {
dataChanged(app.packageName);
} catch (RemoteException e) {
// can't happen; we're in the same process
}
}
}
}
}
// Add a transport to our set of available backends
private void registerTransport(String name, IBackupTransport transport) {
synchronized (mTransports) {
if (DEBUG) Log.v(TAG, "Registering transport " + name + " = " + transport);
mTransports.put(name, transport);
}
// If the init sentinel file exists, we need to be sure to perform the init
// as soon as practical. We also create the state directory at registration
// time to ensure it's present from the outset.
try {
String transportName = transport.transportDirName();
File stateDir = new File(mBaseStateDir, transportName);
stateDir.mkdirs();
File initSentinel = new File(stateDir, INIT_SENTINEL_FILE_NAME);
if (initSentinel.exists()) {
synchronized (mQueueLock) {
mPendingInits.add(transportName);
// TODO: pick a better starting time than now + 1 minute
long delay = 1000 * 60; // one minute, in milliseconds
mAlarmManager.set(AlarmManager.RTC_WAKEUP,
System.currentTimeMillis() + delay, mRunInitIntent);
}
}
} catch (RemoteException e) {
// can't happen, the transport is local
}
}
// ----- Track installation/removal of packages -----
BroadcastReceiver mBroadcastReceiver = new BroadcastReceiver() {
public void onReceive(Context context, Intent intent) {
if (DEBUG) Log.d(TAG, "Received broadcast " + intent);
Uri uri = intent.getData();
if (uri == null) {
return;
}
String pkgName = uri.getSchemeSpecificPart();
if (pkgName == null) {
return;
}
String action = intent.getAction();
if (Intent.ACTION_PACKAGE_ADDED.equals(action)) {
synchronized (mBackupParticipants) {
Bundle extras = intent.getExtras();
if (extras != null && extras.getBoolean(Intent.EXTRA_REPLACING, false)) {
// The package was just upgraded
updatePackageParticipantsLocked(pkgName);
} else {
// The package was just added
addPackageParticipantsLocked(pkgName);
}
}
}
else if (Intent.ACTION_PACKAGE_REMOVED.equals(action)) {
Bundle extras = intent.getExtras();
if (extras != null && extras.getBoolean(Intent.EXTRA_REPLACING, false)) {
// The package is being updated. We'll receive a PACKAGE_ADDED shortly.
} else {
synchronized (mBackupParticipants) {
removePackageParticipantsLocked(pkgName);
}
}
}
}
};
// ----- Track connection to GoogleBackupTransport service -----
ServiceConnection mGoogleConnection = new ServiceConnection() {
public void onServiceConnected(ComponentName name, IBinder service) {
if (DEBUG) Log.v(TAG, "Connected to Google transport");
mGoogleTransport = IBackupTransport.Stub.asInterface(service);
registerTransport(name.flattenToShortString(), mGoogleTransport);
}
public void onServiceDisconnected(ComponentName name) {
if (DEBUG) Log.v(TAG, "Disconnected from Google transport");
mGoogleTransport = null;
registerTransport(name.flattenToShortString(), null);
}
};
// ----- Run the actual backup process asynchronously -----
private class BackupHandler extends Handler {
public void handleMessage(Message msg) {
switch (msg.what) {
case MSG_RUN_BACKUP:
{
IBackupTransport transport = getTransport(mCurrentTransport);
if (transport == null) {
Log.v(TAG, "Backup requested but no transport available");
mWakelock.release();
break;
}
// snapshot the pending-backup set and work on that
ArrayList<BackupRequest> queue = new ArrayList<BackupRequest>();
File oldJournal = mJournal;
synchronized (mQueueLock) {
// Do we have any work to do?
if (mPendingBackups.size() > 0) {
for (BackupRequest b: mPendingBackups.values()) {
queue.add(b);
}
Log.v(TAG, "clearing pending backups");
mPendingBackups.clear();
// Start a new backup-queue journal file too
if (mJournalStream != null) {
try {
mJournalStream.close();
} catch (IOException e) {
// don't need to do anything
}
makeJournalLocked();
}
// At this point, we have started a new journal file, and the old
// file identity is being passed to the backup processing thread.
// When it completes successfully, that old journal file will be
// deleted. If we crash prior to that, the old journal is parsed
// at next boot and the journaled requests fulfilled.
(new PerformBackupThread(transport, queue, oldJournal)).start();
} else {
Log.v(TAG, "Backup requested but nothing pending");
mWakelock.release();
}
}
break;
}
case MSG_RUN_FULL_BACKUP:
break;
case MSG_RUN_RESTORE:
{
RestoreParams params = (RestoreParams)msg.obj;
Log.d(TAG, "MSG_RUN_RESTORE observer=" + params.observer);
(new PerformRestoreThread(params.transport, params.observer,
params.token)).start();
break;
}
case MSG_RUN_CLEAR:
{
ClearParams params = (ClearParams)msg.obj;
(new PerformClearThread(params.transport, params.packageInfo)).start();
break;
}
case MSG_RUN_INITIALIZE:
{
HashSet<String> queue;
// Snapshot the pending-init queue and work on that
synchronized (mQueueLock) {
queue = new HashSet<String>(mPendingInits);
mPendingInits.clear();
}
(new PerformInitializeThread(queue)).start();
break;
}
}
}
}
// Add the backup agents in the given package to our set of known backup participants.
// If 'packageName' is null, adds all backup agents in the whole system.
void addPackageParticipantsLocked(String packageName) {
// Look for apps that define the android:backupAgent attribute
if (DEBUG) Log.v(TAG, "addPackageParticipantsLocked: " + packageName);
List<PackageInfo> targetApps = allAgentPackages();
addPackageParticipantsLockedInner(packageName, targetApps);
}
private void addPackageParticipantsLockedInner(String packageName,
List<PackageInfo> targetPkgs) {
if (DEBUG) {
Log.v(TAG, "Adding " + targetPkgs.size() + " backup participants:");
for (PackageInfo p : targetPkgs) {
Log.v(TAG, " " + p + " agent=" + p.applicationInfo.backupAgentName
+ " uid=" + p.applicationInfo.uid
+ " killAfterRestore="
+ (((p.applicationInfo.flags & ApplicationInfo.FLAG_KILL_AFTER_RESTORE) != 0) ? "true" : "false")
+ " restoreNeedsApplication="
+ (((p.applicationInfo.flags & ApplicationInfo.FLAG_RESTORE_NEEDS_APPLICATION) != 0) ? "true" : "false")
);
}
}
for (PackageInfo pkg : targetPkgs) {
if (packageName == null || pkg.packageName.equals(packageName)) {
int uid = pkg.applicationInfo.uid;
HashSet<ApplicationInfo> set = mBackupParticipants.get(uid);
if (set == null) {
set = new HashSet<ApplicationInfo>();
mBackupParticipants.put(uid, set);
}
set.add(pkg.applicationInfo);
// If we've never seen this app before, schedule a backup for it
if (!mEverStoredApps.contains(pkg.packageName)) {
if (DEBUG) Log.i(TAG, "New app " + pkg.packageName
+ " never backed up; scheduling");
try {
dataChanged(pkg.packageName);
} catch (RemoteException e) {
// can't happen; it's a local method call
}
}
}
}
}
// Remove the given package's entry from our known active set. If
// 'packageName' is null, *all* participating apps will be removed.
void removePackageParticipantsLocked(String packageName) {
if (DEBUG) Log.v(TAG, "removePackageParticipantsLocked: " + packageName);
List<PackageInfo> allApps = null;
if (packageName != null) {
allApps = new ArrayList<PackageInfo>();
try {
int flags = PackageManager.GET_SIGNATURES;
allApps.add(mPackageManager.getPackageInfo(packageName, flags));
} catch (Exception e) {
// just skip it (???)
}
} else {
// all apps with agents
allApps = allAgentPackages();
}
removePackageParticipantsLockedInner(packageName, allApps);
}
private void removePackageParticipantsLockedInner(String packageName,
List<PackageInfo> agents) {
if (DEBUG) {
Log.v(TAG, "removePackageParticipantsLockedInner (" + packageName
+ ") removing " + agents.size() + " entries");
for (PackageInfo p : agents) {
Log.v(TAG, " - " + p);
}
}
for (PackageInfo pkg : agents) {
if (packageName == null || pkg.packageName.equals(packageName)) {
int uid = pkg.applicationInfo.uid;
HashSet<ApplicationInfo> set = mBackupParticipants.get(uid);
if (set != null) {
// Find the existing entry with the same package name, and remove it.
// We can't just remove(app) because the instances are different.
for (ApplicationInfo entry: set) {
if (entry.packageName.equals(pkg.packageName)) {
set.remove(entry);
removeEverBackedUp(pkg.packageName);
break;
}
}
if (set.size() == 0) {
mBackupParticipants.delete(uid);
}
}
}
}
}
// Returns the set of all applications that define an android:backupAgent attribute
List<PackageInfo> allAgentPackages() {
// !!! TODO: cache this and regenerate only when necessary
int flags = PackageManager.GET_SIGNATURES;
List<PackageInfo> packages = mPackageManager.getInstalledPackages(flags);
int N = packages.size();
for (int a = N-1; a >= 0; a--) {
PackageInfo pkg = packages.get(a);
try {
ApplicationInfo app = pkg.applicationInfo;
if (((app.flags&ApplicationInfo.FLAG_ALLOW_BACKUP) == 0)
|| app.backupAgentName == null
|| (mPackageManager.checkPermission(android.Manifest.permission.BACKUP_DATA,
pkg.packageName) != PackageManager.PERMISSION_GRANTED)) {
packages.remove(a);
}
else {
// we will need the shared library path, so look that up and store it here
app = mPackageManager.getApplicationInfo(pkg.packageName,
PackageManager.GET_SHARED_LIBRARY_FILES);
pkg.applicationInfo.sharedLibraryFiles = app.sharedLibraryFiles;
}
} catch (NameNotFoundException e) {
packages.remove(a);
}
}
return packages;
}
// Reset the given package's known backup participants. Unlike add/remove, the update
// action cannot be passed a null package name.
void updatePackageParticipantsLocked(String packageName) {
if (packageName == null) {
Log.e(TAG, "updatePackageParticipants called with null package name");
return;
}
if (DEBUG) Log.v(TAG, "updatePackageParticipantsLocked: " + packageName);
// brute force but small code size
List<PackageInfo> allApps = allAgentPackages();
removePackageParticipantsLockedInner(packageName, allApps);
addPackageParticipantsLockedInner(packageName, allApps);
}
// Called from the backup thread: record that the given app has been successfully
// backed up at least once
void logBackupComplete(String packageName) {
if (mEverStoredStream != null && !packageName.equals(PACKAGE_MANAGER_SENTINEL)) {
synchronized (mEverStoredApps) {
if (mEverStoredApps.add(packageName)) {
try {
mEverStoredStream.writeUTF(packageName);
} catch (IOException e) {
Log.e(TAG, "Unable to log backup of " + packageName + ", ceasing log");
try {
mEverStoredStream.close();
} catch (IOException ioe) {
// we're dropping it; no need to handle an exception on close here
}
mEverStoredStream = null;
}
}
}
}
}
// Remove our awareness of having ever backed up the given package
void removeEverBackedUp(String packageName) {
if (DEBUG) Log.v(TAG, "Removing backed-up knowledge of " + packageName
+ ", new set:");
if (mEverStoredStream != null) {
synchronized (mEverStoredApps) {
// Rewrite the file and rename to overwrite. If we reboot in the middle,
// we'll recognize on initialization time that the package no longer
// exists and fix it up then.
File tempKnownFile = new File(mBaseStateDir, "processed.new");
try {
mEverStoredStream.close();
RandomAccessFile known = new RandomAccessFile(tempKnownFile, "rw");
mEverStoredApps.remove(packageName);
for (String s : mEverStoredApps) {
known.writeUTF(s);
if (DEBUG) Log.v(TAG, " " + s);
}
known.close();
tempKnownFile.renameTo(mEverStored);
mEverStoredStream = new RandomAccessFile(mEverStored, "rwd");
} catch (IOException e) {
// Bad: we couldn't create the new copy. For safety's sake we
// abandon the whole process and remove all what's-backed-up
// state entirely, meaning we'll force a backup pass for every
// participant on the next boot or [re]install.
Log.w(TAG, "Error rewriting backed-up set; halting log");
mEverStoredStream = null;
mEverStoredApps.clear();
tempKnownFile.delete();
mEverStored.delete();
}
}
}
}
// Return the given transport
private IBackupTransport getTransport(String transportName) {
synchronized (mTransports) {
IBackupTransport transport = mTransports.get(transportName);
if (transport == null) {
Log.w(TAG, "Requested unavailable transport: " + transportName);
}
return transport;
}
}
// fire off a backup agent, blocking until it attaches or times out
IBackupAgent bindToAgentSynchronous(ApplicationInfo app, int mode) {
IBackupAgent agent = null;
synchronized(mAgentConnectLock) {
mConnecting = true;
mConnectedAgent = null;
try {
if (mActivityManager.bindBackupAgent(app, mode)) {
Log.d(TAG, "awaiting agent for " + app);
// success; wait for the agent to arrive
// only wait 10 seconds for the clear data to happen
long timeoutMark = System.currentTimeMillis() + TIMEOUT_INTERVAL;
while (mConnecting && mConnectedAgent == null
&& (System.currentTimeMillis() < timeoutMark)) {
try {
mAgentConnectLock.wait(5000);
} catch (InterruptedException e) {
// just bail
return null;
}
}
// if we timed out with no connect, abort and move on
if (mConnecting == true) {
Log.w(TAG, "Timeout waiting for agent " + app);
return null;
}
agent = mConnectedAgent;
}
} catch (RemoteException e) {
// can't happen
}
}
return agent;
}
// clear an application's data, blocking until the operation completes or times out
void clearApplicationDataSynchronous(String packageName) {
// Don't wipe packages marked allowClearUserData=false
try {
PackageInfo info = mPackageManager.getPackageInfo(packageName, 0);
if ((info.applicationInfo.flags & ApplicationInfo.FLAG_ALLOW_CLEAR_USER_DATA) == 0) {
if (DEBUG) Log.i(TAG, "allowClearUserData=false so not wiping "
+ packageName);
return;
}
} catch (NameNotFoundException e) {
Log.w(TAG, "Tried to clear data for " + packageName + " but not found");
return;
}
ClearDataObserver observer = new ClearDataObserver();
synchronized(mClearDataLock) {
mClearingData = true;
/* This is causing some critical processes to be killed during setup.
Temporarily revert this change until we find a better solution.
try {
mActivityManager.clearApplicationUserData(packageName, observer);
} catch (RemoteException e) {
// can't happen because the activity manager is in this process
}
*/
mPackageManager.clearApplicationUserData(packageName, observer);
// only wait 10 seconds for the clear data to happen
long timeoutMark = System.currentTimeMillis() + TIMEOUT_INTERVAL;
while (mClearingData && (System.currentTimeMillis() < timeoutMark)) {
try {
mClearDataLock.wait(5000);
} catch (InterruptedException e) {
// won't happen, but still.
mClearingData = false;
}
}
}
}
class ClearDataObserver extends IPackageDataObserver.Stub {
public void onRemoveCompleted(String packageName, boolean succeeded)
throws RemoteException {
synchronized(mClearDataLock) {
mClearingData = false;
mClearDataLock.notifyAll();
}
}
}
// ----- Back up a set of applications via a worker thread -----
class PerformBackupThread extends Thread {
private static final String TAG = "PerformBackupThread";
IBackupTransport mTransport;
ArrayList<BackupRequest> mQueue;
File mStateDir;
File mJournal;
public PerformBackupThread(IBackupTransport transport, ArrayList<BackupRequest> queue,
File journal) {
mTransport = transport;
mQueue = queue;
mJournal = journal;
try {
mStateDir = new File(mBaseStateDir, transport.transportDirName());
} catch (RemoteException e) {
// can't happen; the transport is local
}
}
@Override
public void run() {
int status = BackupConstants.TRANSPORT_OK;
long startRealtime = SystemClock.elapsedRealtime();
if (DEBUG) Log.v(TAG, "Beginning backup of " + mQueue.size() + " targets");
// Backups run at background priority
Process.setThreadPriority(Process.THREAD_PRIORITY_BACKGROUND);
try {
EventLog.writeEvent(BACKUP_START_EVENT, mTransport.transportDirName());
// If we haven't stored anything yet, we need to do an init operation.
if (status == BackupConstants.TRANSPORT_OK && mEverStoredApps.size() == 0) {
status = mTransport.initializeDevice();
}
// The package manager doesn't have a proper <application> etc, but since
// it's running here in the system process we can just set up its agent
// directly and use a synthetic BackupRequest. We always run this pass
// because it's cheap and this way we guarantee that we don't get out of
// step even if we're selecting among various transports at run time.
if (status == BackupConstants.TRANSPORT_OK) {
PackageManagerBackupAgent pmAgent = new PackageManagerBackupAgent(
mPackageManager, allAgentPackages());
BackupRequest pmRequest = new BackupRequest(new ApplicationInfo(), false);
pmRequest.appInfo.packageName = PACKAGE_MANAGER_SENTINEL;
status = processOneBackup(pmRequest,
IBackupAgent.Stub.asInterface(pmAgent.onBind()), mTransport);
}
if (status == BackupConstants.TRANSPORT_OK) {
// Now run all the backups in our queue
status = doQueuedBackups(mTransport);
}
if (status == BackupConstants.TRANSPORT_OK) {
// Tell the transport to finish everything it has buffered
status = mTransport.finishBackup();
if (status == BackupConstants.TRANSPORT_OK) {
int millis = (int) (SystemClock.elapsedRealtime() - startRealtime);
EventLog.writeEvent(BACKUP_SUCCESS_EVENT, mQueue.size(), millis);
} else {
EventLog.writeEvent(BACKUP_TRANSPORT_FAILURE_EVENT, "");
Log.e(TAG, "Transport error in finishBackup()");
}
}
if (status == BackupConstants.TRANSPORT_NOT_INITIALIZED) {
// The backend reports that our dataset has been wiped. We need to
// reset all of our bookkeeping and instead run a new backup pass for
// everything.
EventLog.writeEvent(BACKUP_RESET_EVENT, mTransport.transportDirName());
resetBackupState(mStateDir);
backupNow();
}
} catch (Exception e) {
Log.e(TAG, "Error in backup thread", e);
status = BackupConstants.TRANSPORT_ERROR;
} finally {
// If things went wrong, we need to re-stage the apps we had expected
// to be backing up in this pass. This journals the package names in
// the current active pending-backup file, not in the we are holding
// here in mJournal.
if (status != BackupConstants.TRANSPORT_OK) {
Log.w(TAG, "Backup pass unsuccessful, restaging");
for (BackupRequest req : mQueue) {
try {
dataChanged(req.appInfo.packageName);
} catch (RemoteException e) {
// can't happen; it's a local call
}
}
// We also want to reset the backup schedule based on whatever
// the transport suggests by way of retry/backoff time.
try {
startBackupAlarmsLocked(mTransport.requestBackupTime());
} catch (RemoteException e) { /* cannot happen */ }
}
// Either backup was successful, in which case we of course do not need
// this pass's journal any more; or it failed, in which case we just
// re-enqueued all of these packages in the current active journal.
// Either way, we no longer need this pass's journal.
if (!mJournal.delete()) {
Log.e(TAG, "Unable to remove backup journal file " + mJournal);
}
// Only once we're entirely finished do we indicate our completion
// and release the wakelock
synchronized (mQueueLock) {
mBackupOrRestoreInProgress = false;
}
mWakelock.release();
}
}
private int doQueuedBackups(IBackupTransport transport) {
for (BackupRequest request : mQueue) {
Log.d(TAG, "starting agent for backup of " + request);
// Don't run backup, even if requested, if the target app does not have
// the requisite permission
if (mPackageManager.checkPermission(android.Manifest.permission.BACKUP_DATA,
request.appInfo.packageName) != PackageManager.PERMISSION_GRANTED) {
Log.w(TAG, "Skipping backup of unprivileged package "
+ request.appInfo.packageName);
continue;
}
IBackupAgent agent = null;
int mode = (request.fullBackup)
? IApplicationThread.BACKUP_MODE_FULL
: IApplicationThread.BACKUP_MODE_INCREMENTAL;
try {
agent = bindToAgentSynchronous(request.appInfo, mode);
if (agent != null) {
int result = processOneBackup(request, agent, transport);
if (result != BackupConstants.TRANSPORT_OK) return result;
}
} catch (SecurityException ex) {
// Try for the next one.
Log.d(TAG, "error in bind/backup", ex);
} finally {
try { // unbind even on timeout, just in case
mActivityManager.unbindBackupAgent(request.appInfo);
} catch (RemoteException e) {}
}
}
return BackupConstants.TRANSPORT_OK;
}
private int processOneBackup(BackupRequest request, IBackupAgent agent,
IBackupTransport transport) {
final String packageName = request.appInfo.packageName;
if (DEBUG) Log.d(TAG, "processOneBackup doBackup() on " + packageName);
File savedStateName = new File(mStateDir, packageName);
File backupDataName = new File(mDataDir, packageName + ".data");
File newStateName = new File(mStateDir, packageName + ".new");
ParcelFileDescriptor savedState = null;
ParcelFileDescriptor backupData = null;
ParcelFileDescriptor newState = null;
PackageInfo packInfo;
try {
// Look up the package info & signatures. This is first so that if it
// throws an exception, there's no file setup yet that would need to
// be unraveled.
if (packageName.equals(PACKAGE_MANAGER_SENTINEL)) {
// The metadata 'package' is synthetic
packInfo = new PackageInfo();
packInfo.packageName = packageName;
} else {
packInfo = mPackageManager.getPackageInfo(packageName,
PackageManager.GET_SIGNATURES);
}
// In a full backup, we pass a null ParcelFileDescriptor as
// the saved-state "file"
if (!request.fullBackup) {
savedState = ParcelFileDescriptor.open(savedStateName,
ParcelFileDescriptor.MODE_READ_ONLY |
ParcelFileDescriptor.MODE_CREATE); // Make an empty file if necessary
}
backupData = ParcelFileDescriptor.open(backupDataName,
ParcelFileDescriptor.MODE_READ_WRITE |
ParcelFileDescriptor.MODE_CREATE |
ParcelFileDescriptor.MODE_TRUNCATE);
newState = ParcelFileDescriptor.open(newStateName,
ParcelFileDescriptor.MODE_READ_WRITE |
ParcelFileDescriptor.MODE_CREATE |
ParcelFileDescriptor.MODE_TRUNCATE);
// Run the target's backup pass
agent.doBackup(savedState, backupData, newState);
logBackupComplete(packageName);
if (DEBUG) Log.v(TAG, "doBackup() success");
} catch (Exception e) {
Log.e(TAG, "Error backing up " + packageName, e);
EventLog.writeEvent(BACKUP_AGENT_FAILURE_EVENT, packageName, e.toString());
backupDataName.delete();
newStateName.delete();
return BackupConstants.TRANSPORT_ERROR;
} finally {
try { if (savedState != null) savedState.close(); } catch (IOException e) {}
try { if (backupData != null) backupData.close(); } catch (IOException e) {}
try { if (newState != null) newState.close(); } catch (IOException e) {}
savedState = backupData = newState = null;
}
// Now propagate the newly-backed-up data to the transport
int result = BackupConstants.TRANSPORT_OK;
try {
int size = (int) backupDataName.length();
if (size > 0) {
if (result == BackupConstants.TRANSPORT_OK) {
backupData = ParcelFileDescriptor.open(backupDataName,
ParcelFileDescriptor.MODE_READ_ONLY);
result = transport.performBackup(packInfo, backupData);
}
// TODO - We call finishBackup() for each application backed up, because
// we need to know now whether it succeeded or failed. Instead, we should
// hold off on finishBackup() until the end, which implies holding off on
// renaming *all* the output state files (see below) until that happens.
if (result == BackupConstants.TRANSPORT_OK) {
result = transport.finishBackup();
}
} else {
if (DEBUG) Log.i(TAG, "no backup data written; not calling transport");
}
// After successful transport, delete the now-stale data
// and juggle the files so that next time we supply the agent
// with the new state file it just created.
if (result == BackupConstants.TRANSPORT_OK) {
backupDataName.delete();
newStateName.renameTo(savedStateName);
EventLog.writeEvent(BACKUP_PACKAGE_EVENT, packageName, size);
} else {
EventLog.writeEvent(BACKUP_TRANSPORT_FAILURE_EVENT, packageName);
}
} catch (Exception e) {
Log.e(TAG, "Transport error backing up " + packageName, e);
EventLog.writeEvent(BACKUP_TRANSPORT_FAILURE_EVENT, packageName);
result = BackupConstants.TRANSPORT_ERROR;
} finally {
try { if (backupData != null) backupData.close(); } catch (IOException e) {}
}
return result;
}
}
// ----- Restore handling -----
private boolean signaturesMatch(Signature[] storedSigs, Signature[] deviceSigs) {
// Allow unsigned apps, but not signed on one device and unsigned on the other
// !!! TODO: is this the right policy?
if (DEBUG) Log.v(TAG, "signaturesMatch(): stored=" + storedSigs
+ " device=" + deviceSigs);
if ((storedSigs == null || storedSigs.length == 0)
&& (deviceSigs == null || deviceSigs.length == 0)) {
return true;
}
if (storedSigs == null || deviceSigs == null) {
return false;
}
// !!! TODO: this demands that every stored signature match one
// that is present on device, and does not demand the converse.
// Is this this right policy?
int nStored = storedSigs.length;
int nDevice = deviceSigs.length;
for (int i=0; i < nStored; i++) {
boolean match = false;
for (int j=0; j < nDevice; j++) {
if (storedSigs[i].equals(deviceSigs[j])) {
match = true;
break;
}
}
if (!match) {
return false;
}
}
return true;
}
class PerformRestoreThread extends Thread {
private IBackupTransport mTransport;
private IRestoreObserver mObserver;
private long mToken;
private File mStateDir;
class RestoreRequest {
public PackageInfo app;
public int storedAppVersion;
RestoreRequest(PackageInfo _app, int _version) {
app = _app;
storedAppVersion = _version;
}
}
PerformRestoreThread(IBackupTransport transport, IRestoreObserver observer,
long restoreSetToken) {
mTransport = transport;
Log.d(TAG, "PerformRestoreThread mObserver=" + mObserver);
mObserver = observer;
mToken = restoreSetToken;
try {
mStateDir = new File(mBaseStateDir, transport.transportDirName());
} catch (RemoteException e) {
// can't happen; the transport is local
}
}
@Override
public void run() {
long startRealtime = SystemClock.elapsedRealtime();
if (DEBUG) Log.v(TAG, "Beginning restore process mTransport=" + mTransport
+ " mObserver=" + mObserver + " mToken=" + Long.toHexString(mToken));
/**
* Restore sequence:
*
* 1. get the restore set description for our identity
* 2. for each app in the restore set:
* 2.a. if it's restorable on this device, add it to the restore queue
* 3. for each app in the restore queue:
* 3.a. clear the app data
* 3.b. get the restore data for the app from the transport
* 3.c. launch the backup agent for the app
* 3.d. agent.doRestore() with the data from the server
* 3.e. unbind the agent [and kill the app?]
* 4. shut down the transport
*
* On errors, we try our best to recover and move on to the next
* application, but if necessary we abort the whole operation --
* the user is waiting, after al.
*/
int error = -1; // assume error
// build the set of apps to restore
try {
// TODO: Log this before getAvailableRestoreSets, somehow
EventLog.writeEvent(RESTORE_START_EVENT, mTransport.transportDirName(), mToken);
// Get the list of all packages which have backup enabled.
// (Include the Package Manager metadata pseudo-package first.)
ArrayList<PackageInfo> restorePackages = new ArrayList<PackageInfo>();
PackageInfo omPackage = new PackageInfo();
omPackage.packageName = PACKAGE_MANAGER_SENTINEL;
restorePackages.add(omPackage);
List<PackageInfo> agentPackages = allAgentPackages();
restorePackages.addAll(agentPackages);
// let the observer know that we're running
if (mObserver != null) {
try {
// !!! TODO: get an actual count from the transport after
// its startRestore() runs?
mObserver.restoreStarting(restorePackages.size());
} catch (RemoteException e) {
Log.d(TAG, "Restore observer died at restoreStarting");
mObserver = null;
}
}
if (mTransport.startRestore(mToken, restorePackages.toArray(new PackageInfo[0])) !=
BackupConstants.TRANSPORT_OK) {
Log.e(TAG, "Error starting restore operation");
EventLog.writeEvent(RESTORE_TRANSPORT_FAILURE_EVENT);
return;
}
String packageName = mTransport.nextRestorePackage();
if (packageName == null) {
Log.e(TAG, "Error getting first restore package");
EventLog.writeEvent(RESTORE_TRANSPORT_FAILURE_EVENT);
return;
} else if (packageName.equals("")) {
Log.i(TAG, "No restore data available");
int millis = (int) (SystemClock.elapsedRealtime() - startRealtime);
EventLog.writeEvent(RESTORE_SUCCESS_EVENT, 0, millis);
return;
} else if (!packageName.equals(PACKAGE_MANAGER_SENTINEL)) {
Log.e(TAG, "Expected restore data for \"" + PACKAGE_MANAGER_SENTINEL
+ "\", found only \"" + packageName + "\"");
EventLog.writeEvent(RESTORE_AGENT_FAILURE_EVENT, PACKAGE_MANAGER_SENTINEL,
"Package manager data missing");
return;
}
// Pull the Package Manager metadata from the restore set first
PackageManagerBackupAgent pmAgent = new PackageManagerBackupAgent(
mPackageManager, agentPackages);
processOneRestore(omPackage, 0, IBackupAgent.Stub.asInterface(pmAgent.onBind()));
// Verify that the backup set includes metadata. If not, we can't do
// signature/version verification etc, so we simply do not proceed with
// the restore operation.
if (!pmAgent.hasMetadata()) {
Log.e(TAG, "No restore metadata available, so not restoring settings");
EventLog.writeEvent(RESTORE_AGENT_FAILURE_EVENT, PACKAGE_MANAGER_SENTINEL,
"Package manager restore metadata missing");
return;
}
int count = 0;
for (;;) {
packageName = mTransport.nextRestorePackage();
if (packageName == null) {
Log.e(TAG, "Error getting next restore package");
EventLog.writeEvent(RESTORE_TRANSPORT_FAILURE_EVENT);
return;
} else if (packageName.equals("")) {
break;
}
if (mObserver != null) {
try {
mObserver.onUpdate(count);
} catch (RemoteException e) {
Log.d(TAG, "Restore observer died in onUpdate");
mObserver = null;
}
}
Metadata metaInfo = pmAgent.getRestoredMetadata(packageName);
if (metaInfo == null) {
Log.e(TAG, "Missing metadata for " + packageName);
EventLog.writeEvent(RESTORE_AGENT_FAILURE_EVENT, packageName,
"Package metadata missing");
continue;
}
PackageInfo packageInfo;
try {
int flags = PackageManager.GET_SIGNATURES;
packageInfo = mPackageManager.getPackageInfo(packageName, flags);
} catch (NameNotFoundException e) {
Log.e(TAG, "Invalid package restoring data", e);
EventLog.writeEvent(RESTORE_AGENT_FAILURE_EVENT, packageName,
"Package missing on device");
continue;
}
if (metaInfo.versionCode > packageInfo.versionCode) {
String message = "Version " + metaInfo.versionCode
+ " > installed version " + packageInfo.versionCode;
Log.w(TAG, "Package " + packageName + ": " + message);
EventLog.writeEvent(RESTORE_AGENT_FAILURE_EVENT, packageName, message);
continue;
}
if (!signaturesMatch(metaInfo.signatures, packageInfo.signatures)) {
Log.w(TAG, "Signature mismatch restoring " + packageName);
EventLog.writeEvent(RESTORE_AGENT_FAILURE_EVENT, packageName,
"Signature mismatch");
continue;
}
if (DEBUG) Log.v(TAG, "Package " + packageName
+ " restore version [" + metaInfo.versionCode
+ "] is compatible with installed version ["
+ packageInfo.versionCode + "]");
// Now perform the actual restore: first clear the app's data
// if appropriate
clearApplicationDataSynchronous(packageName);
// Then set up and bind the agent (with a restricted Application object
// unless the application says otherwise)
boolean useRealApp = (packageInfo.applicationInfo.flags
& ApplicationInfo.FLAG_RESTORE_NEEDS_APPLICATION) != 0;
if (DEBUG && useRealApp) {
Log.v(TAG, "agent requires real Application subclass for restore");
}
IBackupAgent agent = bindToAgentSynchronous(
packageInfo.applicationInfo,
(useRealApp ? IApplicationThread.BACKUP_MODE_INCREMENTAL
: IApplicationThread.BACKUP_MODE_RESTORE));
if (agent == null) {
Log.w(TAG, "Can't find backup agent for " + packageName);
EventLog.writeEvent(RESTORE_AGENT_FAILURE_EVENT, packageName,
"Restore agent missing");
continue;
}
// And then finally run the restore on this agent
try {
processOneRestore(packageInfo, metaInfo.versionCode, agent);
++count;
} finally {
// unbind and tidy up even on timeout or failure, just in case
mActivityManager.unbindBackupAgent(packageInfo.applicationInfo);
// The agent was probably running with a stub Application object,
// which isn't a valid run mode for the main app logic. Shut
// down the app so that next time it's launched, it gets the
// usual full initialization.
if ((packageInfo.applicationInfo.flags
& ApplicationInfo.FLAG_KILL_AFTER_RESTORE) != 0) {
if (DEBUG) Log.d(TAG, "Restore complete, killing host process of "
+ packageInfo.applicationInfo.processName);
mActivityManager.killApplicationProcess(
packageInfo.applicationInfo.processName,
packageInfo.applicationInfo.uid);
}
}
}
// if we get this far, report success to the observer
error = 0;
int millis = (int) (SystemClock.elapsedRealtime() - startRealtime);
EventLog.writeEvent(RESTORE_SUCCESS_EVENT, count, millis);
} catch (Exception e) {
Log.e(TAG, "Error in restore thread", e);
} finally {
if (DEBUG) Log.d(TAG, "finishing restore mObserver=" + mObserver);
try {
mTransport.finishRestore();
} catch (RemoteException e) {
Log.e(TAG, "Error finishing restore", e);
}
if (mObserver != null) {
try {
mObserver.restoreFinished(error);
} catch (RemoteException e) {
Log.d(TAG, "Restore observer died at restoreFinished");
}
}
// done; we can finally release the wakelock
synchronized (mQueueLock) {
mBackupOrRestoreInProgress = false;
}
mWakelock.release();
}
}
// Do the guts of a restore of one application, using mTransport.getRestoreData().
void processOneRestore(PackageInfo app, int appVersionCode, IBackupAgent agent) {
// !!! TODO: actually run the restore through mTransport
final String packageName = app.packageName;
if (DEBUG) Log.d(TAG, "processOneRestore packageName=" + packageName);
// Don't restore to unprivileged packages
if (mPackageManager.checkPermission(android.Manifest.permission.BACKUP_DATA,
packageName) != PackageManager.PERMISSION_GRANTED) {
Log.d(TAG, "Skipping restore of unprivileged package " + packageName);
}
// !!! TODO: get the dirs from the transport
File backupDataName = new File(mDataDir, packageName + ".restore");
File newStateName = new File(mStateDir, packageName + ".new");
File savedStateName = new File(mStateDir, packageName);
ParcelFileDescriptor backupData = null;
ParcelFileDescriptor newState = null;
try {
// Run the transport's restore pass
backupData = ParcelFileDescriptor.open(backupDataName,
ParcelFileDescriptor.MODE_READ_WRITE |
ParcelFileDescriptor.MODE_CREATE |
ParcelFileDescriptor.MODE_TRUNCATE);
if (mTransport.getRestoreData(backupData) != BackupConstants.TRANSPORT_OK) {
Log.e(TAG, "Error getting restore data for " + packageName);
EventLog.writeEvent(RESTORE_TRANSPORT_FAILURE_EVENT);
return;
}
// Okay, we have the data. Now have the agent do the restore.
backupData.close();
backupData = ParcelFileDescriptor.open(backupDataName,
ParcelFileDescriptor.MODE_READ_ONLY);
newState = ParcelFileDescriptor.open(newStateName,
ParcelFileDescriptor.MODE_READ_WRITE |
ParcelFileDescriptor.MODE_CREATE |
ParcelFileDescriptor.MODE_TRUNCATE);
agent.doRestore(backupData, appVersionCode, newState);
// if everything went okay, remember the recorded state now
//
// !!! TODO: the restored data should be migrated on the server
// side into the current dataset. In that case the new state file
// we just created would reflect the data already extant in the
// backend, so there'd be nothing more to do. Until that happens,
// however, we need to make sure that we record the data to the
// current backend dataset. (Yes, this means shipping the data over
// the wire in both directions. That's bad, but consistency comes
// first, then efficiency.) Once we introduce server-side data
// migration to the newly-restored device's dataset, we will change
// the following from a discard of the newly-written state to the
// "correct" operation of renaming into the canonical state blob.
newStateName.delete(); // TODO: remove; see above comment
//newStateName.renameTo(savedStateName); // TODO: replace with this
int size = (int) backupDataName.length();
EventLog.writeEvent(RESTORE_PACKAGE_EVENT, packageName, size);
} catch (Exception e) {
Log.e(TAG, "Error restoring data for " + packageName, e);
EventLog.writeEvent(RESTORE_AGENT_FAILURE_EVENT, packageName, e.toString());
// If the agent fails restore, it might have put the app's data
// into an incoherent state. For consistency we wipe its data
// again in this case before propagating the exception
clearApplicationDataSynchronous(packageName);
} finally {
backupDataName.delete();
try { if (backupData != null) backupData.close(); } catch (IOException e) {}
try { if (newState != null) newState.close(); } catch (IOException e) {}
backupData = newState = null;
}
}
}
class PerformClearThread extends Thread {
IBackupTransport mTransport;
PackageInfo mPackage;
PerformClearThread(IBackupTransport transport, PackageInfo packageInfo) {
mTransport = transport;
mPackage = packageInfo;
}
@Override
public void run() {
try {
// Clear the on-device backup state to ensure a full backup next time
File stateDir = new File(mBaseStateDir, mTransport.transportDirName());
File stateFile = new File(stateDir, mPackage.packageName);
stateFile.delete();
// Tell the transport to remove all the persistent storage for the app
// STOPSHIP TODO - need to handle failures
mTransport.clearBackupData(mPackage);
} catch (RemoteException e) {
// can't happen; the transport is local
} finally {
try {
// STOPSHIP TODO - need to handle failures
mTransport.finishBackup();
} catch (RemoteException e) {
// can't happen; the transport is local
}
// Last but not least, release the cpu
mWakelock.release();
}
}
}
class PerformInitializeThread extends Thread {
HashSet<String> mQueue;
PerformInitializeThread(HashSet<String> transportNames) {
mQueue = transportNames;
}
@Override
public void run() {
int status;
try {
for (String transportName : mQueue) {
IBackupTransport transport = getTransport(transportName);
if (transport == null) {
Log.e(TAG, "Requested init for " + transportName + " but not found");
continue;
}
status = BackupConstants.TRANSPORT_OK;
File stateDir = null;
Log.i(TAG, "Device init on " + transport.transportDirName());
stateDir = new File(mBaseStateDir, transport.transportDirName());
status = transport.initializeDevice();
if (status != BackupConstants.TRANSPORT_OK) {
Log.e(TAG, "Error from initializeDevice: " + status);
}
if (status == BackupConstants.TRANSPORT_OK) {
status = transport.finishBackup();
}
// Okay, the wipe really happened. Clean up our local bookkeeping.
if (status == BackupConstants.TRANSPORT_OK) {
resetBackupState(stateDir);
synchronized (mQueueLock) {
recordInitPendingLocked(false, transportName);
}
}
// If this didn't work, requeue this one and try again
// after a suitable interval
if (status != BackupConstants.TRANSPORT_OK) {
Log.i(TAG, "Device init failed");
synchronized (mQueueLock) {
recordInitPendingLocked(true, transportName);
}
// do this via another alarm to make sure of the wakelock states
long delay = transport.requestBackupTime();
if (DEBUG) Log.w(TAG, "init failed on "
+ transportName + " resched in " + delay);
mAlarmManager.set(AlarmManager.RTC_WAKEUP,
System.currentTimeMillis() + delay, mRunInitIntent);
} else {
// success!
Log.i(TAG, "Device init successful");
}
}
} catch (RemoteException e) {
// can't happen; the transports are local
} catch (Exception e) {
Log.e(TAG, "Unexpected error performing init", e);
} finally {
// Done; indicate that we're finished and release the wakelock
synchronized (mQueueLock) {
mInitInProgress = false;
}
mWakelock.release();
}
}
}
// ----- IBackupManager binder interface -----
public void dataChanged(String packageName) throws RemoteException {
// Record that we need a backup pass for the caller. Since multiple callers
// may share a uid, we need to note all candidates within that uid and schedule
// a backup pass for each of them.
EventLog.writeEvent(BACKUP_DATA_CHANGED_EVENT, packageName);
// If the caller does not hold the BACKUP permission, it can only request a
// backup of its own data.
HashSet<ApplicationInfo> targets;
if ((mContext.checkPermission(android.Manifest.permission.BACKUP, Binder.getCallingPid(),
Binder.getCallingUid())) == PackageManager.PERMISSION_DENIED) {
targets = mBackupParticipants.get(Binder.getCallingUid());
} else {
// a caller with full permission can ask to back up any participating app
// !!! TODO: allow backup of ANY app?
targets = new HashSet<ApplicationInfo>();
int N = mBackupParticipants.size();
for (int i = 0; i < N; i++) {
HashSet<ApplicationInfo> s = mBackupParticipants.valueAt(i);
if (s != null) {
targets.addAll(s);
}
}
}
if (targets != null) {
synchronized (mQueueLock) {
// Note that this client has made data changes that need to be backed up
for (ApplicationInfo app : targets) {
// validate the caller-supplied package name against the known set of
// packages associated with this uid
if (app.packageName.equals(packageName)) {
// Add the caller to the set of pending backups. If there is
// one already there, then overwrite it, but no harm done.
BackupRequest req = new BackupRequest(app, false);
if (mPendingBackups.put(app, req) == null) {
// Journal this request in case of crash. The put()
// operation returned null when this package was not already
// in the set; we want to avoid touching the disk redundantly.
writeToJournalLocked(packageName);
if (DEBUG) {
int numKeys = mPendingBackups.size();
Log.d(TAG, "Now awaiting backup for " + numKeys + " participants:");
for (BackupRequest b : mPendingBackups.values()) {
Log.d(TAG, " + " + b + " agent=" + b.appInfo.backupAgentName);
}
}
}
}
}
}
} else {
Log.w(TAG, "dataChanged but no participant pkg='" + packageName + "'"
+ " uid=" + Binder.getCallingUid());
}
}
private void writeToJournalLocked(String str) {
if (mJournalStream != null) {
try {
mJournalStream.writeUTF(str);
} catch (IOException e) {
Log.e(TAG, "Error writing to backup journal");
mJournalStream = null;
mJournal = null;
}
}
}
// Clear the given package's backup data from the current transport
public void clearBackupData(String packageName) {
if (DEBUG) Log.v(TAG, "clearBackupData() of " + packageName);
PackageInfo info;
try {
info = mPackageManager.getPackageInfo(packageName, PackageManager.GET_SIGNATURES);
} catch (NameNotFoundException e) {
Log.d(TAG, "No such package '" + packageName + "' - not clearing backup data");
return;
}
// If the caller does not hold the BACKUP permission, it can only request a
// wipe of its own backed-up data.
HashSet<ApplicationInfo> apps;
if ((mContext.checkPermission(android.Manifest.permission.BACKUP, Binder.getCallingPid(),
Binder.getCallingUid())) == PackageManager.PERMISSION_DENIED) {
apps = mBackupParticipants.get(Binder.getCallingUid());
} else {
// a caller with full permission can ask to back up any participating app
// !!! TODO: allow data-clear of ANY app?
if (DEBUG) Log.v(TAG, "Privileged caller, allowing clear of other apps");
apps = new HashSet<ApplicationInfo>();
int N = mBackupParticipants.size();
for (int i = 0; i < N; i++) {
HashSet<ApplicationInfo> s = mBackupParticipants.valueAt(i);
if (s != null) {
apps.addAll(s);
}
}
}
// now find the given package in the set of candidate apps
for (ApplicationInfo app : apps) {
if (app.packageName.equals(packageName)) {
if (DEBUG) Log.v(TAG, "Found the app - running clear process");
// found it; fire off the clear request
synchronized (mQueueLock) {
long oldId = Binder.clearCallingIdentity();
mWakelock.acquire();
Message msg = mBackupHandler.obtainMessage(MSG_RUN_CLEAR,
new ClearParams(getTransport(mCurrentTransport), info));
mBackupHandler.sendMessage(msg);
Binder.restoreCallingIdentity(oldId);
}
break;
}
}
}
// Run a backup pass immediately for any applications that have declared
// that they have pending updates.
public void backupNow() throws RemoteException {
mContext.enforceCallingOrSelfPermission(android.Manifest.permission.BACKUP, "backupNow");
if (DEBUG) Log.v(TAG, "Scheduling immediate backup pass");
synchronized (mQueueLock) {
// Because the alarms we are using can jitter, and we want an *immediate*
// backup pass to happen, we restart the timer beginning with "next time,"
// then manually fire the backup trigger intent ourselves.
startBackupAlarmsLocked(BACKUP_INTERVAL);
try {
mRunBackupIntent.send();
} catch (PendingIntent.CanceledException e) {
// should never happen
Log.e(TAG, "run-backup intent cancelled!");
}
}
}
// Enable/disable the backup service
public void setBackupEnabled(boolean enable) {
mContext.enforceCallingOrSelfPermission(android.Manifest.permission.BACKUP,
"setBackupEnabled");
Log.i(TAG, "Backup enabled => " + enable);
boolean wasEnabled = mEnabled;
synchronized (this) {
Settings.Secure.putInt(mContext.getContentResolver(),
Settings.Secure.BACKUP_ENABLED, enable ? 1 : 0);
mEnabled = enable;
}
synchronized (mQueueLock) {
if (enable && !wasEnabled && mProvisioned) {
// if we've just been enabled, start scheduling backup passes
startBackupAlarmsLocked(BACKUP_INTERVAL);
} else if (!enable) {
// No longer enabled, so stop running backups
if (DEBUG) Log.i(TAG, "Opting out of backup");
mAlarmManager.cancel(mRunBackupIntent);
// This also constitutes an opt-out, so we wipe any data for
// this device from the backend. We start that process with
// an alarm in order to guarantee wakelock states.
if (wasEnabled && mProvisioned) {
// NOTE: we currently flush every registered transport, not just
// the currently-active one.
HashSet<String> allTransports;
synchronized (mTransports) {
allTransports = new HashSet<String>(mTransports.keySet());
}
// build the set of transports for which we are posting an init
for (String transport : allTransports) {
recordInitPendingLocked(true, transport);
}
mAlarmManager.set(AlarmManager.RTC_WAKEUP, System.currentTimeMillis(),
mRunInitIntent);
}
}
}
}
// Mark the backup service as having been provisioned
public void setBackupProvisioned(boolean available) {
mContext.enforceCallingOrSelfPermission(android.Manifest.permission.BACKUP,
"setBackupProvisioned");
boolean wasProvisioned = mProvisioned;
synchronized (this) {
Settings.Secure.putInt(mContext.getContentResolver(),
Settings.Secure.BACKUP_PROVISIONED, available ? 1 : 0);
mProvisioned = available;
}
synchronized (mQueueLock) {
if (available && !wasProvisioned && mEnabled) {
// we're now good to go, so start the backup alarms
startBackupAlarmsLocked(FIRST_BACKUP_INTERVAL);
} else if (!available) {
// No longer enabled, so stop running backups
Log.w(TAG, "Backup service no longer provisioned");
mAlarmManager.cancel(mRunBackupIntent);
}
}
}
private void startBackupAlarmsLocked(long delayBeforeFirstBackup) {
long when = System.currentTimeMillis() + delayBeforeFirstBackup;
mAlarmManager.setInexactRepeating(AlarmManager.RTC_WAKEUP, when,
BACKUP_INTERVAL, mRunBackupIntent);
}
// Report whether the backup mechanism is currently enabled
public boolean isBackupEnabled() {
mContext.enforceCallingOrSelfPermission(android.Manifest.permission.BACKUP, "isBackupEnabled");
return mEnabled; // no need to synchronize just to read it
}
// Report the name of the currently active transport
public String getCurrentTransport() {
mContext.enforceCallingOrSelfPermission(android.Manifest.permission.BACKUP,
"getCurrentTransport");
Log.v(TAG, "... getCurrentTransport() returning " + mCurrentTransport);
return mCurrentTransport;
}
// Report all known, available backup transports
public String[] listAllTransports() {
mContext.enforceCallingOrSelfPermission(android.Manifest.permission.BACKUP, "listAllTransports");
String[] list = null;
ArrayList<String> known = new ArrayList<String>();
for (Map.Entry<String, IBackupTransport> entry : mTransports.entrySet()) {
if (entry.getValue() != null) {
known.add(entry.getKey());
}
}
if (known.size() > 0) {
list = new String[known.size()];
known.toArray(list);
}
return list;
}
// Select which transport to use for the next backup operation. If the given
// name is not one of the available transports, no action is taken and the method
// returns null.
public String selectBackupTransport(String transport) {
mContext.enforceCallingOrSelfPermission(android.Manifest.permission.BACKUP, "selectBackupTransport");
synchronized (mTransports) {
String prevTransport = null;
if (mTransports.get(transport) != null) {
prevTransport = mCurrentTransport;
mCurrentTransport = transport;
Settings.Secure.putString(mContext.getContentResolver(),
Settings.Secure.BACKUP_TRANSPORT, transport);
Log.v(TAG, "selectBackupTransport() set " + mCurrentTransport
+ " returning " + prevTransport);
} else {
Log.w(TAG, "Attempt to select unavailable transport " + transport);
}
return prevTransport;
}
}
// Callback: a requested backup agent has been instantiated. This should only
// be called from the Activity Manager.
public void agentConnected(String packageName, IBinder agentBinder) {
synchronized(mAgentConnectLock) {
if (Binder.getCallingUid() == Process.SYSTEM_UID) {
Log.d(TAG, "agentConnected pkg=" + packageName + " agent=" + agentBinder);
IBackupAgent agent = IBackupAgent.Stub.asInterface(agentBinder);
mConnectedAgent = agent;
mConnecting = false;
} else {
Log.w(TAG, "Non-system process uid=" + Binder.getCallingUid()
+ " claiming agent connected");
}
mAgentConnectLock.notifyAll();
}
}
// Callback: a backup agent has failed to come up, or has unexpectedly quit.
// If the agent failed to come up in the first place, the agentBinder argument
// will be null. This should only be called from the Activity Manager.
public void agentDisconnected(String packageName) {
// TODO: handle backup being interrupted
synchronized(mAgentConnectLock) {
if (Binder.getCallingUid() == Process.SYSTEM_UID) {
mConnectedAgent = null;
mConnecting = false;
} else {
Log.w(TAG, "Non-system process uid=" + Binder.getCallingUid()
+ " claiming agent disconnected");
}
mAgentConnectLock.notifyAll();
}
}
// Hand off a restore session
public IRestoreSession beginRestoreSession(String transport) {
mContext.enforceCallingOrSelfPermission(android.Manifest.permission.BACKUP, "beginRestoreSession");
synchronized(this) {
if (mActiveRestoreSession != null) {
Log.d(TAG, "Restore session requested but one already active");
return null;
}
mActiveRestoreSession = new RestoreSession(transport);
}
return mActiveRestoreSession;
}
// ----- Restore session -----
class RestoreSession extends IRestoreSession.Stub {
private static final String TAG = "RestoreSession";
private IBackupTransport mRestoreTransport = null;
RestoreSet[] mRestoreSets = null;
RestoreSession(String transport) {
mRestoreTransport = getTransport(transport);
}
// --- Binder interface ---
public synchronized RestoreSet[] getAvailableRestoreSets() {
mContext.enforceCallingOrSelfPermission(android.Manifest.permission.BACKUP,
"getAvailableRestoreSets");
try {
if (mRestoreTransport == null) {
Log.w(TAG, "Null transport getting restore sets");
return null;
}
if (mRestoreSets == null) { // valid transport; do the one-time fetch
mRestoreSets = mRestoreTransport.getAvailableRestoreSets();
if (mRestoreSets == null) EventLog.writeEvent(RESTORE_TRANSPORT_FAILURE_EVENT);
}
return mRestoreSets;
} catch (Exception e) {
Log.e(TAG, "Error in getAvailableRestoreSets", e);
return null;
}
}
public synchronized int performRestore(long token, IRestoreObserver observer) {
mContext.enforceCallingOrSelfPermission(android.Manifest.permission.BACKUP,
"performRestore");
if (DEBUG) Log.d(TAG, "performRestore token=" + Long.toHexString(token)
+ " observer=" + observer);
if (mRestoreTransport == null || mRestoreSets == null) {
Log.e(TAG, "Ignoring performRestore() with no restore set");
return -1;
}
synchronized (mQueueLock) {
if (mBackupOrRestoreInProgress) {
Log.e(TAG, "Backup pass in progress, restore aborted");
return -1;
}
for (int i = 0; i < mRestoreSets.length; i++) {
if (token == mRestoreSets[i].token) {
long oldId = Binder.clearCallingIdentity();
// Suppress backups until the restore operation is finished
mBackupOrRestoreInProgress = true;
mWakelock.acquire();
Message msg = mBackupHandler.obtainMessage(MSG_RUN_RESTORE);
msg.obj = new RestoreParams(mRestoreTransport, observer, token);
mBackupHandler.sendMessage(msg);
Binder.restoreCallingIdentity(oldId);
return 0;
}
}
}
Log.w(TAG, "Restore token " + Long.toHexString(token) + " not found");
return -1;
}
public synchronized void endRestoreSession() {
mContext.enforceCallingOrSelfPermission(android.Manifest.permission.BACKUP,
"endRestoreSession");
if (DEBUG) Log.d(TAG, "endRestoreSession");
synchronized (this) {
try {
if (mRestoreTransport != null) mRestoreTransport.finishRestore();
} catch (Exception e) {
Log.e(TAG, "Error in finishRestore", e);
} finally {
mRestoreTransport = null;
}
}
synchronized (BackupManagerService.this) {
if (BackupManagerService.this.mActiveRestoreSession == this) {
BackupManagerService.this.mActiveRestoreSession = null;
} else {
Log.e(TAG, "ending non-current restore session");
}
}
}
}
@Override
public void dump(FileDescriptor fd, PrintWriter pw, String[] args) {
synchronized (mQueueLock) {
pw.println("Backup Manager is " + (mEnabled ? "enabled" : "disabled")
+ " / " + (!mProvisioned ? "not " : "") + "provisioned");
pw.println("Available transports:");
for (String t : listAllTransports()) {
String pad = (t.equals(mCurrentTransport)) ? " * " : " ";
pw.println(pad + t);
}
int N = mBackupParticipants.size();
pw.println("Participants: " + N);
for (int i=0; i<N; i++) {
int uid = mBackupParticipants.keyAt(i);
pw.print(" uid: ");
pw.println(uid);
HashSet<ApplicationInfo> participants = mBackupParticipants.valueAt(i);
for (ApplicationInfo app: participants) {
pw.println(" " + app.toString());
}
}
pw.println("Ever backed up: " + mEverStoredApps.size());
for (String pkg : mEverStoredApps) {
pw.println(" " + pkg);
}
pw.println("Pending: " + mPendingBackups.size());
for (BackupRequest req : mPendingBackups.values()) {
pw.println(" " + req);
}
}
}
}
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