am c93c70c4: Merge "framework: storage: Ensure that filesystems are unmounted before shutdown/reboot" into eclair

Merge commit 'c93c70c4b849d31ff1b5e5cf2fb9462fd60e5da0' into eclair-plus-aosp

* commit 'c93c70c4b849d31ff1b5e5cf2fb9462fd60e5da0':
  framework: storage: Ensure that filesystems are unmounted before shutdown/reboot

core/java/android/os/IMountService.aidl

@@ -75,4 +75,9 @@ interface IMountService
      * when a UMS host is detected.
      */
     void setAutoStartUms(boolean value);
+
+    /**
+     * Shuts down the MountService and gracefully unmounts all external media.
+     */
+    void shutdown();
 }

core/java/android/os/Power.java

@@ -17,6 +17,8 @@
 package android.os;
 
 import java.io.IOException;
+import android.os.ServiceManager;
+import android.os.IMountService;
 
 /**
  * Class that provides access to some of the power management functions.
@@ -97,5 +99,19 @@ public class Power
      * @throws IOException if reboot fails for some reason (eg, lack of
      *         permission)
      */
-    public static native void reboot(String reason) throws IOException;
+    public static void reboot(String reason) throws IOException
+    {
+        IMountService mSvc = IMountService.Stub.asInterface(
+                ServiceManager.getService("mount"));
+
+        if (mSvc != null) {
+            try {
+                mSvc.shutdown();
+            } catch (Exception e) {
+            }
+        }
+        rebootNative(reason);
+    }
+
+    private static native void rebootNative(String reason) throws IOException ;
 }

core/java/com/android/internal/app/ShutdownThread.java

@@ -32,6 +32,7 @@ import android.os.RemoteException;
 import android.os.Power;
 import android.os.ServiceManager;
 import android.os.SystemClock;
+import android.os.IMountService;
 
 import com.android.internal.telephony.ITelephony;
 import android.util.Log;
@@ -190,6 +191,10 @@ public final class ShutdownThread extends Thread {
                 IBluetooth.Stub.asInterface(ServiceManager.checkService(
                         BluetoothAdapter.BLUETOOTH_SERVICE));
 
+        final IMountService mount =
+                IMountService.Stub.asInterface(
+                        ServiceManager.checkService("mount"));
+        
         try {
             bluetoothOff = bluetooth == null ||
                            bluetooth.getBluetoothState() == BluetoothAdapter.STATE_OFF;
@@ -241,6 +246,17 @@ public final class ShutdownThread extends Thread {
             SystemClock.sleep(PHONE_STATE_POLL_SLEEP_MSEC);
         }
 
+        // Shutdown MountService to ensure media is in a safe state
+        try {
+            if (mount != null) {
+                mount.shutdown();
+            } else {
+                Log.w(TAG, "MountService unavailable for shutdown");
+            }
+        } catch (Exception e) {
+            Log.e(TAG, "Exception during MountService shutdown", e);
+        }
+
         //shutdown power
         Log.i(TAG, "Performing low-level shutdown...");
         Power.shutdown();

core/jni/android_os_Power.cpp

@@ -105,7 +105,7 @@ static JNINativeMethod method_table[] = {
     { "setLastUserActivityTimeout", "(J)I", (void*)setLastUserActivityTimeout },
     { "setScreenState", "(Z)I", (void*)setScreenState },
     { "shutdown", "()V", (void*)android_os_Power_shutdown },
-    { "reboot", "(Ljava/lang/String;)V", (void*)android_os_Power_reboot },
+    { "rebootNative", "(Ljava/lang/String;)V", (void*)android_os_Power_reboot },
 };
 
 int register_android_os_Power(JNIEnv *env)

services/java/com/android/server/MountService.java

@@ -108,13 +108,86 @@ class MountService extends IMountService.Stub {
 
     BroadcastReceiver mBroadcastReceiver = new BroadcastReceiver() {
         public void onReceive(Context context, Intent intent) {
-            if (intent.getAction().equals(Intent.ACTION_BOOT_COMPLETED)) {
+            String action = intent.getAction();
+
+            if (action.equals(Intent.ACTION_BOOT_COMPLETED)) {
                 Thread thread = new Thread(mListener, MountListener.class.getName());
                 thread.start();
             }
         }
     };
 
+    public void shutdown() {
+        if (mContext.checkCallingOrSelfPermission(
+                android.Manifest.permission.SHUTDOWN)
+                != PackageManager.PERMISSION_GRANTED) {
+            throw new SecurityException("Requires SHUTDOWN permission");
+        }
+
+        Log.d(TAG, "Shutting down");
+        String state = Environment.getExternalStorageState();
+
+        if (state.equals(Environment.MEDIA_SHARED)) {
+            /*
+             * If the media is currently shared, unshare it.
+             * XXX: This is still dangerous!. We should not
+             * be rebooting at *all* if UMS is enabled, since
+             * the UMS host could have dirty FAT cache entries
+             * yet to flush.
+             */
+            try {
+               setMassStorageEnabled(false);
+            } catch (Exception e) {
+                Log.e(TAG, "ums disable failed", e);
+            }
+        } else if (state.equals(Environment.MEDIA_CHECKING)) {
+            /*
+             * If the media is being checked, then we need to wait for
+             * it to complete before being able to proceed.
+             */
+            // XXX: @hackbod - Should we disable the ANR timer here?
+            int retries = 30;
+            while (state.equals(Environment.MEDIA_CHECKING) && (retries-- >=0)) {
+                try {
+                    Thread.sleep(1000);
+                } catch (InterruptedException iex) {
+                    Log.e(TAG, "Interrupted while waiting for media", iex);
+                    break;
+                }
+                state = Environment.getExternalStorageState();
+            }
+            if (retries == 0) {
+                Log.e(TAG, "Timed out waiting for media to check");
+            }
+        }
+
+        if (state.equals(Environment.MEDIA_MOUNTED)) {
+            /*
+             * If the media is mounted, then gracefully unmount it.
+             */
+            try {
+                String m = Environment.getExternalStorageDirectory().toString();
+                unmountMedia(m);
+
+                int retries = 12;
+                while (!state.equals(Environment.MEDIA_UNMOUNTED) && (retries-- >=0)) {
+                    try {
+                        Thread.sleep(1000);
+                    } catch (InterruptedException iex) {
+                        Log.e(TAG, "Interrupted while waiting for media", iex);
+                        break;
+                    }
+                    state = Environment.getExternalStorageState();
+                }
+                if (retries == 0) {
+                    Log.e(TAG, "Timed out waiting for media to unmount");
+            }
+            } catch (Exception e) {
+                Log.e(TAG, "external storage unmount failed", e);
+            }
+        }
+    }
+
     /**
      * @return true if USB mass storage support is enabled.
      */