diff options
Diffstat (limited to 'services/java/com/android/server/BackupManagerService.java')
| -rw-r--r-- | services/java/com/android/server/BackupManagerService.java | 107 |
1 files changed, 65 insertions, 42 deletions
diff --git a/services/java/com/android/server/BackupManagerService.java b/services/java/com/android/server/BackupManagerService.java index a04ee144da29..baef607a4ec4 100644 --- a/services/java/com/android/server/BackupManagerService.java +++ b/services/java/com/android/server/BackupManagerService.java @@ -46,6 +46,8 @@ import android.content.pm.IPackageInstallObserver; import android.content.pm.IPackageManager; import android.content.pm.PackageInfo; import android.content.pm.PackageManager; +import android.content.pm.ResolveInfo; +import android.content.pm.ServiceInfo; import android.content.pm.Signature; import android.content.pm.PackageManager.NameNotFoundException; import android.database.ContentObserver; @@ -146,6 +148,7 @@ class BackupManagerService extends IBackupManager.Stub { static final boolean COMPRESS_FULL_BACKUPS = true; // should be true in production static final String SHARED_BACKUP_AGENT_PACKAGE = "com.android.sharedstoragebackup"; + static final String SERVICE_ACTION_TRANSPORT_HOST = "android.backup.TRANSPORT_HOST"; // How often we perform a backup pass. Privileged external callers can // trigger an immediate pass. @@ -251,10 +254,13 @@ class BackupManagerService extends IBackupManager.Stub { volatile boolean mClearingData; // Transport bookkeeping + final HashMap<String,String> mTransportNames + = new HashMap<String,String>(); // component name -> registration name final HashMap<String,IBackupTransport> mTransports - = new HashMap<String,IBackupTransport>(); + = new HashMap<String,IBackupTransport>(); // registration name -> binder + final ArrayList<TransportConnection> mTransportConnections + = new ArrayList<TransportConnection>(); String mCurrentTransport; - IBackupTransport mLocalTransport, mGoogleTransport; ActiveRestoreSession mActiveRestoreSession; // Watch the device provisioning operation during setup @@ -815,13 +821,7 @@ class BackupManagerService extends IBackupManager.Stub { } // 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)) { @@ -829,28 +829,43 @@ class BackupManagerService extends IBackupManager.Stub { } if (DEBUG) Slog.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. - ComponentName transportComponent = new ComponentName("com.google.android.backup", - "com.google.android.backup.BackupTransportService"); - try { - // If there's something out there that is supposed to be the Google - // backup transport, make sure it's legitimately part of the OS build - // and not an app lying about its package name. - ApplicationInfo info = mPackageManager.getApplicationInfo( - transportComponent.getPackageName(), 0); - if ((info.flags & ApplicationInfo.FLAG_SYSTEM) != 0) { - if (DEBUG) Slog.v(TAG, "Binding to Google transport"); - Intent intent = new Intent().setComponent(transportComponent); - context.bindServiceAsUser(intent, mGoogleConnection, Context.BIND_AUTO_CREATE, - UserHandle.OWNER); - } else { - Slog.w(TAG, "Possible Google transport spoof: ignoring " + info); + // Find transport hosts and bind to their services + Intent transportServiceIntent = new Intent(SERVICE_ACTION_TRANSPORT_HOST); + List<ResolveInfo> hosts = mPackageManager.queryIntentServicesAsUser( + transportServiceIntent, 0, UserHandle.USER_OWNER); + if (DEBUG) { + Slog.v(TAG, "Found transports: " + ((hosts == null) ? "null" : hosts.size())); + } + if (hosts != null) { + if (MORE_DEBUG) { + for (int i = 0; i < hosts.size(); i++) { + ServiceInfo info = hosts.get(i).serviceInfo; + Slog.v(TAG, " " + info.packageName + "/" + info.name); + } + } + for (int i = 0; i < hosts.size(); i++) { + try { + ServiceInfo info = hosts.get(i).serviceInfo; + PackageInfo packInfo = mPackageManager.getPackageInfo(info.packageName, 0); + if ((packInfo.applicationInfo.flags & ApplicationInfo.FLAG_PRIVILEGED) != 0) { + ComponentName svcName = new ComponentName(info.packageName, info.name); + if (DEBUG) { + Slog.i(TAG, "Binding to transport host " + svcName); + } + Intent intent = new Intent(transportServiceIntent); + intent.setComponent(svcName); + TransportConnection connection = new TransportConnection(); + mTransportConnections.add(connection); + context.bindServiceAsUser(intent, + connection, Context.BIND_AUTO_CREATE, + UserHandle.OWNER); + } else { + Slog.w(TAG, "Transport package not privileged: " + info.packageName); + } + } catch (Exception e) { + Slog.e(TAG, "Problem resolving transport service: " + e.getMessage()); + } } - } catch (PackageManager.NameNotFoundException nnf) { - // No such package? No binding. - if (DEBUG) Slog.v(TAG, "Google transport not present"); } // Now that we know about valid backup participants, parse any @@ -1298,13 +1313,16 @@ class BackupManagerService extends IBackupManager.Stub { // Add a transport to our set of available backends. If 'transport' is null, this // is an unregistration, and the transport's entry is removed from our bookkeeping. - private void registerTransport(String name, IBackupTransport transport) { + private void registerTransport(String name, String component, IBackupTransport transport) { synchronized (mTransports) { - if (DEBUG) Slog.v(TAG, "Registering transport " + name + " = " + transport); + if (DEBUG) Slog.v(TAG, "Registering transport " + + component + "::" + name + " = " + transport); if (transport != null) { mTransports.put(name, transport); + mTransportNames.put(component, name); } else { - mTransports.remove(name); + mTransports.remove(mTransportNames.get(component)); + mTransportNames.remove(component); // Nothing further to do in the unregistration case return; } @@ -1390,18 +1408,23 @@ class BackupManagerService extends IBackupManager.Stub { } }; - // ----- Track connection to GoogleBackupTransport service ----- - ServiceConnection mGoogleConnection = new ServiceConnection() { - public void onServiceConnected(ComponentName name, IBinder service) { - if (DEBUG) Slog.v(TAG, "Connected to Google transport"); - mGoogleTransport = IBackupTransport.Stub.asInterface(service); - registerTransport(name.flattenToShortString(), mGoogleTransport); + // ----- Track connection to transports service ----- + class TransportConnection implements ServiceConnection { + @Override + public void onServiceConnected(ComponentName component, IBinder service) { + if (DEBUG) Slog.v(TAG, "Connected to transport " + component); + try { + IBackupTransport transport = IBackupTransport.Stub.asInterface(service); + registerTransport(transport.name(), component.flattenToShortString(), transport); + } catch (RemoteException e) { + Slog.e(TAG, "Unable to register transport " + component); + } } - public void onServiceDisconnected(ComponentName name) { - if (DEBUG) Slog.v(TAG, "Disconnected from Google transport"); - mGoogleTransport = null; - registerTransport(name.flattenToShortString(), null); + @Override + public void onServiceDisconnected(ComponentName component) { + if (DEBUG) Slog.v(TAG, "Disconnected from transport " + component); + registerTransport(null, component.flattenToShortString(), null); } }; |