[FSD2D] Make adjustments to restore flow (1cbf11ae) · Commits · e / os / android_frameworks_base

services/backup/java/com/android/server/backup/UserBackupManagerService.java

+16 −1

Original line number	Diff line number	Diff line
		@@ -441,6 +441,7 @@ public class UserBackupManagerService {
		private long mAncestralToken = 0;
		private long mCurrentToken = 0;
		@Nullable private File mAncestralSerialNumberFile;
		@OperationType private volatile long mAncestralOperationType;

		private final ContentObserver mSetupObserver;
		private final BroadcastReceiver mRunInitReceiver;
		@@ -881,6 +882,10 @@ public class UserBackupManagerService {
		mAncestralToken = ancestralToken;
		}

		public void setAncestralOperationType(@OperationType int operationType) {
		mAncestralOperationType = operationType;
		}

		public long getCurrentToken() {
		return mCurrentToken;
		}
		@@ -1808,6 +1813,16 @@ public class UserBackupManagerService {
		}
		}

		private BackupEligibilityRules getEligibilityRulesForRestoreAtInstall(long restoreToken) {
		if (mAncestralOperationType == OperationType.MIGRATION && restoreToken == mAncestralToken) {
		return getEligibilityRulesForOperation(OperationType.MIGRATION);
		} else {
		// If we're not using the ancestral data set, it means we're restoring from a backup
		// that happened on this device.
		return mScheduledBackupEligibility;
		}
		}

		/**
		* Get the restore-set token for the best-available restore set for this {@code packageName}:
		* the active set if possible, else the ancestral one. Returns zero if none available.
		@@ -3976,7 +3991,7 @@ public class UserBackupManagerService {
		packageName,
		token,
		listener,
		mScheduledBackupEligibility);
		getEligibilityRulesForRestoreAtInstall(restoreSet));
		mBackupHandler.sendMessage(msg);
		} catch (Exception e) {
		// Calling into the transport broke; back off and proceed with the installation.

services/backup/java/com/android/server/backup/restore/FullRestoreEngine.java

+6 −1

Original line number	Diff line number	Diff line
		@@ -27,6 +27,7 @@ import static com.android.server.backup.internal.BackupHandler.MSG_RESTORE_OPERA

		import android.app.ApplicationThreadConstants;
		import android.app.IBackupAgent;
		import android.app.backup.BackupManager;
		import android.app.backup.FullBackup;
		import android.app.backup.IBackupManagerMonitor;
		import android.app.backup.IFullBackupRestoreObserver;
		@@ -633,7 +634,11 @@ public class FullRestoreEngine extends RestoreEngine {
		setRunning(false);
		}

		private static boolean isRestorableFile(FileMetadata info) {
		private boolean isRestorableFile(FileMetadata info) {
		if (mBackupEligibilityRules.getOperationType() == BackupManager.OperationType.MIGRATION) {
		// Everything is eligible for device-to-device migration.
		return true;
		}
		if (FullBackup.CACHE_TREE_TOKEN.equals(info.domain)) {
		if (MORE_DEBUG) {
		Slog.i(TAG, "Dropping cache file path " + info.path);

services/backup/java/com/android/server/backup/restore/PerformUnifiedRestoreTask.java

+2 −0

Original line number	Diff line number	Diff line
		@@ -1136,6 +1136,8 @@ public class PerformUnifiedRestoreTask implements BackupRestoreTask {
		if (mIsSystemRestore && mPmAgent != null) {
		backupManagerService.setAncestralPackages(mPmAgent.getRestoredPackages());
		backupManagerService.setAncestralToken(mToken);
		backupManagerService.setAncestralOperationType(
		mBackupEligibilityRules.getOperationType());
		backupManagerService.writeRestoreTokens();
		}

services/backup/java/com/android/server/backup/utils/BackupEligibilityRules.java

+23 −3

Original line number	Diff line number	Diff line
		@@ -85,12 +85,15 @@ public class BackupEligibilityRules {
		* <li>they run as a system-level uid but do not supply their own backup agent
		* <li>it is the special shared-storage backup package used for 'adb backup'
		* </ol>
		*
		* However, the above eligibility rules are ignored for non-system apps in in case of
		* device-to-device migration, see {@link OperationType}.
		*/
		@VisibleForTesting
		public boolean appIsEligibleForBackup(ApplicationInfo app) {
		// 1. their manifest states android:allowBackup="false"
		boolean appAllowsBackup = (app.flags & ApplicationInfo.FLAG_ALLOW_BACKUP) != 0;
		if (!appAllowsBackup && !forceFullBackup(app.uid, mOperationType)) {
		// 1. their manifest states android:allowBackup="false" and this is not a device-to-device
		// migration
		if (!isAppBackupAllowed(app)) {
		return false;
		}

		@@ -122,6 +125,23 @@ public class BackupEligibilityRules {
		return !appIsDisabled(app);
		}

		/**
		* Check if this app allows backup. Apps can opt out of backup by stating
		* android:allowBackup="false" in their manifest. However, this flag is ignored for non-system
		* apps during device-to-device migrations, see {@link OperationType}.
		*
		* @param app The app under check.
		* @return boolean indicating whether backup is allowed.
		*/
		public boolean isAppBackupAllowed(ApplicationInfo app) {
		if (mOperationType == OperationType.MIGRATION && !UserHandle.isCore(app.uid)) {
		// Backup / restore of all apps is force allowed during device-to-device migration.
		return true;
		}

		return (app.flags & ApplicationInfo.FLAG_ALLOW_BACKUP) != 0;
		}

		/**
		* Returns whether an app is eligible for backup at runtime. That is, the app has to:
		* <ol>

services/backup/java/com/android/server/backup/utils/TarBackupReader.java

+1 −1

Original line number	Diff line number	Diff line
		@@ -402,7 +402,7 @@ public class TarBackupReader {
		info.packageName, PackageManager.GET_SIGNING_CERTIFICATES, userId);
		// Fall through to IGNORE if the app explicitly disallows backup
		final int flags = pkgInfo.applicationInfo.flags;
		if ((flags & ApplicationInfo.FLAG_ALLOW_BACKUP) != 0) {
		if (eligibilityRules.isAppBackupAllowed(pkgInfo.applicationInfo)) {
		// Restore system-uid-space packages only if they have
		// defined a custom backup agent
		if (!UserHandle.isCore(pkgInfo.applicationInfo.uid)