am c7b31e3c: The rest of the basic flow for restore (bb8d0dfe) · Commits · e / os / android_frameworks_base

services/java/com/android/server/BackupManagerService.java

+203 −94

Original line number	Diff line number	Diff line
		@@ -25,6 +25,7 @@ import android.content.Context;
		import android.content.Intent;
		import android.content.IntentFilter;
		import android.content.pm.ApplicationInfo;
		import android.content.pm.IPackageDataObserver;
		import android.content.pm.PackageInfo;
		import android.content.pm.PackageManager;
		import android.content.pm.PackageManager.NameNotFoundException;
		@@ -53,6 +54,7 @@ import com.android.internal.backup.IBackupTransport;
		import java.io.File;
		import java.io.FileDescriptor;
		import java.io.FileNotFoundException;
		import java.io.IOException;
		import java.io.PrintWriter;
		import java.lang.String;
		import java.util.ArrayList;
		@@ -71,6 +73,9 @@ class BackupManagerService extends IBackupManager.Stub {
		private static final int MSG_RUN_BACKUP = 1;
		private static final int MSG_RUN_FULL_BACKUP = 2;

		// 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 final IActivityManager mActivityManager;
		@@ -108,6 +113,10 @@ class BackupManagerService extends IBackupManager.Stub {
		private IBackupAgent mConnectedAgent;
		private volatile boolean mConnecting;

		// A similar synchronicity mechanism around clearing apps' data for restore
		private final Object mClearDataLock = new Object();
		private volatile boolean mClearingData;

		private int mTransportId;

		private File mStateDir;
		@@ -207,80 +216,6 @@ class BackupManagerService extends IBackupManager.Stub {
		}
		}

		void processOneBackup(BackupRequest request, IBackupAgent agent, IBackupTransport transport) {
		final String packageName = request.appInfo.packageName;
		Log.d(TAG, "processOneBackup doBackup() on " + packageName);

		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.
		PackageInfo packInfo = mPackageManager.getPackageInfo(packageName,
		PackageManager.GET_SIGNATURES);

		// !!! TODO: get the state file dir from the transport
		File savedStateName = new File(mStateDir, packageName);
		File backupDataName = new File(mDataDir, packageName + ".data");
		File newStateName = new File(mStateDir, packageName + ".new");

		// In a full backup, we pass a null ParcelFileDescriptor as
		// the saved-state "file"
		ParcelFileDescriptor savedState = (request.fullBackup) ? null
		: ParcelFileDescriptor.open(savedStateName,
		ParcelFileDescriptor.MODE_READ_ONLY \|
		ParcelFileDescriptor.MODE_CREATE);

		backupDataName.delete();
		ParcelFileDescriptor backupData =
		ParcelFileDescriptor.open(backupDataName,
		ParcelFileDescriptor.MODE_READ_WRITE \|
		ParcelFileDescriptor.MODE_CREATE);

		newStateName.delete();
		ParcelFileDescriptor newState =
		ParcelFileDescriptor.open(newStateName,
		ParcelFileDescriptor.MODE_READ_WRITE \|
		ParcelFileDescriptor.MODE_CREATE);

		// Run the target's backup pass
		boolean success = false;
		try {
		agent.doBackup(savedState, backupData, newState);
		success = true;
		} finally {
		if (savedState != null) {
		savedState.close();
		}
		backupData.close();
		newState.close();
		}

		// Now propagate the newly-backed-up data to the transport
		if (success) {
		if (DEBUG) Log.v(TAG, "doBackup() success; calling transport");
		backupData =
		ParcelFileDescriptor.open(backupDataName, ParcelFileDescriptor.MODE_READ_ONLY);
		int error = transport.performBackup(packInfo, backupData);

		// !!! TODO: After successful transport, delete the now-stale data
		// and juggle the files so that next time the new state is passed
		//backupDataName.delete();
		newStateName.renameTo(savedStateName);
		}
		} catch (NameNotFoundException e) {
		Log.e(TAG, "Package not found on backup: " + packageName);
		} catch (FileNotFoundException fnf) {
		Log.w(TAG, "File not found on backup: ");
		fnf.printStackTrace();
		} catch (RemoteException e) {
		Log.d(TAG, "Remote target " + request.appInfo.packageName + " threw during backup:");
		e.printStackTrace();
		} catch (Exception e) {
		Log.w(TAG, "Final exception guard in backup: ");
		e.printStackTrace();
		}
		}

		// 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) {
		@@ -424,11 +359,14 @@ class BackupManagerService extends IBackupManager.Stub {
		Log.d(TAG, "awaiting agent for " + app);

		// success; wait for the agent to arrive
		while (mConnecting && mConnectedAgent == null) {
		// 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(10000);
		mAgentConnectLock.wait(5000);
		} catch (InterruptedException e) {
		// just retry
		// just bail
		return null;
		}
		}
		@@ -447,6 +385,37 @@ class BackupManagerService extends IBackupManager.Stub {
		return agent;
		}

		// clear an application's data, blocking until the operation completes or times out
		void clearApplicationDataSynchronous(String packageName) {
		ClearDataObserver observer = new ClearDataObserver();

		synchronized(mClearDataLock) {
		mClearingData = true;
		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 android.os.RemoteException {
		synchronized(mClearDataLock) {
		mClearingData = false;
		notifyAll();
		}
		}
		}

		// ----- Back up a set of applications via a worker thread -----

		class PerformBackupThread extends Thread {
		@@ -508,13 +477,88 @@ class BackupManagerService extends IBackupManager.Stub {
		mActivityManager.unbindBackupAgent(request.appInfo);
		} catch (SecurityException ex) {
		// Try for the next one.
		Log.d(TAG, "error in bind", ex);
		Log.d(TAG, "error in bind/backup", ex);
		} catch (RemoteException e) {
		// can't happen
		Log.v(TAG, "bind/backup threw");
		e.printStackTrace();
		}

		}
		}

		void processOneBackup(BackupRequest request, IBackupAgent agent, IBackupTransport transport) {
		final String packageName = request.appInfo.packageName;
		Log.d(TAG, "processOneBackup doBackup() on " + packageName);

		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.
		PackageInfo packInfo = mPackageManager.getPackageInfo(packageName,
		PackageManager.GET_SIGNATURES);

		// !!! TODO: get the state file dir from the transport
		File savedStateName = new File(mStateDir, packageName);
		File backupDataName = new File(mDataDir, packageName + ".data");
		File newStateName = new File(mStateDir, packageName + ".new");

		// In a full backup, we pass a null ParcelFileDescriptor as
		// the saved-state "file"
		ParcelFileDescriptor savedState = (request.fullBackup) ? null
		: ParcelFileDescriptor.open(savedStateName,
		ParcelFileDescriptor.MODE_READ_ONLY \|
		ParcelFileDescriptor.MODE_CREATE);

		backupDataName.delete();
		ParcelFileDescriptor backupData =
		ParcelFileDescriptor.open(backupDataName,
		ParcelFileDescriptor.MODE_READ_WRITE \|
		ParcelFileDescriptor.MODE_CREATE);

		newStateName.delete();
		ParcelFileDescriptor newState =
		ParcelFileDescriptor.open(newStateName,
		ParcelFileDescriptor.MODE_READ_WRITE \|
		ParcelFileDescriptor.MODE_CREATE);

		// Run the target's backup pass
		boolean success = false;
		try {
		agent.doBackup(savedState, backupData, newState);
		success = true;
		} finally {
		if (savedState != null) {
		savedState.close();
		}
		backupData.close();
		newState.close();
		}

		// Now propagate the newly-backed-up data to the transport
		if (success) {
		if (DEBUG) Log.v(TAG, "doBackup() success; calling transport");
		backupData =
		ParcelFileDescriptor.open(backupDataName, ParcelFileDescriptor.MODE_READ_ONLY);
		int error = transport.performBackup(packInfo, backupData);

		// !!! TODO: After successful transport, delete the now-stale data
		// and juggle the files so that next time the new state is passed
		//backupDataName.delete();
		newStateName.renameTo(savedStateName);
		}
		} catch (NameNotFoundException e) {
		Log.e(TAG, "Package not found on backup: " + packageName);
		} catch (FileNotFoundException fnf) {
		Log.w(TAG, "File not found on backup: ");
		fnf.printStackTrace();
		} catch (RemoteException e) {
		Log.d(TAG, "Remote target " + request.appInfo.packageName + " threw during backup:");
		e.printStackTrace();
		} catch (Exception e) {
		Log.w(TAG, "Final exception guard in backup: ");
		e.printStackTrace();
		}
		}
		}


		@@ -524,12 +568,12 @@ class BackupManagerService extends IBackupManager.Stub {
		// ApplicationInfo struct if it is; null if not.
		//
		// !!! TODO: also consider signatures
		ApplicationInfo isRestorable(PackageInfo packageInfo) {
		PackageInfo isRestorable(PackageInfo packageInfo) {
		if (packageInfo.packageName != null) {
		try {
		ApplicationInfo app = mPackageManager.getApplicationInfo(packageInfo.packageName,
		PackageInfo app = mPackageManager.getPackageInfo(packageInfo.packageName,
		PackageManager.GET_SIGNATURES);
		if ((app.flags & ApplicationInfo.FLAG_ALLOW_BACKUP) != 0) {
		if ((app.applicationInfo.flags & ApplicationInfo.FLAG_ALLOW_BACKUP) != 0) {
		return app;
		}
		} catch (Exception e) {
		@@ -541,6 +585,7 @@ class BackupManagerService extends IBackupManager.Stub {

		class PerformRestoreThread extends Thread {
		private IBackupTransport mTransport;
		private RestoreSet mImage;

		PerformRestoreThread(IBackupTransport transport) {
		mTransport = transport;
		@@ -556,6 +601,7 @@ class BackupManagerService extends IBackupManager.Stub {
		* 3. for each app in the restore set:
		* 3.a. if it's restorable on this device, add it to the restore queue
		* 4. for each app in the restore queue:
		* 4.a. clear the app data
		* 4.b. get the restore data for the app from the transport
		* 4.c. launch the backup agent for the app
		* 4.d. agent.doRestore() with the data from the server
		@@ -577,13 +623,14 @@ class BackupManagerService extends IBackupManager.Stub {
		RestoreSet[] images = mTransport.getAvailableRestoreSets();
		if (images.length > 0) {
		// !!! for now we always take the first set
		RestoreSet image = images[0];
		mImage = images[0];

		// build the set of apps we will attempt to restore
		PackageInfo[] packages = mTransport.getAppSet(image.token);
		HashSet<ApplicationInfo> appsToRestore = new HashSet<ApplicationInfo>();
		PackageInfo[] packages = mTransport.getAppSet(mImage.token);
		HashSet<PackageInfo> appsToRestore = new HashSet<PackageInfo>();
		for (PackageInfo pkg: packages) {
		ApplicationInfo app = isRestorable(pkg);
		// get the real PackageManager idea of the package
		PackageInfo app = isRestorable(pkg);
		if (app != null) {
		appsToRestore.add(app);
		}
		@@ -609,19 +656,23 @@ class BackupManagerService extends IBackupManager.Stub {
		}

		// restore each app in the queue
		void doQueuedRestores(HashSet<ApplicationInfo> appsToRestore) {
		for (ApplicationInfo app : appsToRestore) {
		void doQueuedRestores(HashSet<PackageInfo> appsToRestore) {
		for (PackageInfo app : appsToRestore) {
		Log.d(TAG, "starting agent for restore of " + app);

		IBackupAgent agent = null;
		try {
		agent = bindToAgentSynchronous(app, IApplicationThread.BACKUP_MODE_RESTORE);
		// Remove the app's data first
		clearApplicationDataSynchronous(app.packageName);

		// Now perform the restore into the clean app
		IBackupAgent agent = bindToAgentSynchronous(app.applicationInfo,
		IApplicationThread.BACKUP_MODE_RESTORE);
		if (agent != null) {
		processOneRestore(app, agent);
		}

		// unbind even on timeout, just in case
		mActivityManager.unbindBackupAgent(app);
		mActivityManager.unbindBackupAgent(app.applicationInfo);
		} catch (SecurityException ex) {
		// Try for the next one.
		Log.d(TAG, "error in bind", ex);
		@@ -632,9 +683,67 @@ class BackupManagerService extends IBackupManager.Stub {
		}
		}

		// do the guts of a restore
		void processOneRestore(ApplicationInfo app, IBackupAgent agent) {
		// Do the guts of a restore of one application, derived from the 'mImage'
		// restore set via the 'mTransport' transport.
		void processOneRestore(PackageInfo app, IBackupAgent agent) {
		// !!! TODO: actually run the restore through mTransport
		final String packageName = app.packageName;

		// !!! TODO: get the dirs from the transport
		File backupDataName = new File(mDataDir, packageName + ".restore");
		backupDataName.delete();
		try {
		ParcelFileDescriptor backupData =
		ParcelFileDescriptor.open(backupDataName,
		ParcelFileDescriptor.MODE_READ_WRITE \|
		ParcelFileDescriptor.MODE_CREATE);

		// Run the transport's restore pass
		// Run the target's backup pass
		int err = -1;
		try {
		err = mTransport.getRestoreData(mImage.token, app, backupData);
		} catch (RemoteException e) {
		// can't happen
		} finally {
		backupData.close();
		}

		// Okay, we have the data. Now have the agent do the restore.
		File newStateName = new File(mStateDir, packageName + ".new");
		ParcelFileDescriptor newState =
		ParcelFileDescriptor.open(newStateName,
		ParcelFileDescriptor.MODE_READ_WRITE \|
		ParcelFileDescriptor.MODE_CREATE);

		backupData = ParcelFileDescriptor.open(backupDataName,
		ParcelFileDescriptor.MODE_READ_ONLY);

		boolean success = false;
		try {
		agent.doRestore(backupData, newState);
		success = true;
		} catch (Exception e) {
		Log.e(TAG, "Restore failed for " + packageName);
		e.printStackTrace();
		} finally {
		newState.close();
		backupData.close();
		}

		// if everything went okay, remember the recorded state now
		if (success) {
		File savedStateName = new File(mStateDir, packageName);
		newStateName.renameTo(savedStateName);
		}
		} catch (FileNotFoundException fnfe) {
		Log.v(TAG, "Couldn't open file for restore: " + fnfe);
		} catch (IOException ioe) {
		Log.e(TAG, "Unable to process restore file: " + ioe);
		} catch (Exception e) {
		Log.e(TAG, "Final exception guard in restore:");
		e.printStackTrace();
		}
		}
		}

services/java/com/android/server/am/ActivityManagerService.java

+8 −5

Original line number	Diff line number	Diff line
		@@ -10422,6 +10422,8 @@ public final class ActivityManagerService extends ActivityManagerNative implemen
		// Not backing this app up any more; reset its OOM adjustment
		updateOomAdjLocked(proc);

		// If the app crashed during backup, 'thread' will be null here
		if (proc.thread != null) {
		try {
		proc.thread.scheduleDestroyBackupAgent(appInfo);
		} catch (Exception e) {
		@@ -10430,6 +10432,7 @@ public final class ActivityManagerService extends ActivityManagerNative implemen
		}
		}
		}
		}
		// =========================================================
		// BROADCASTS
		// =========================================================