vold: Bugfixes & cleanups

  - Fix issue where container-names > 64 bytes were getting truncated in the
    kernel. lo_name is only 64 bytes in length, so we now hash the container
    id via md5
  - Add 'dump' command to dump loop and devicemapper status
  - Add 'debug' command to enable more detailed logging at runtime
  - Log vold IPC arguments (minus encryption keys)
  - Fix premature return from Loop::lookupActive() and friends

Change-Id: I0e833261a445ce9dc1a8187e5501d27daba1ca76
Signed-off-by: San Mehat <san@google.com>
diff --git a/Volume.h b/Volume.h
index c7fa996..e756160 100644
--- a/Volume.h
+++ b/Volume.h
@@ -48,6 +48,7 @@
     char *mLabel;
     char *mMountpoint;
     VolumeManager *mVm;
+    bool mDebug;
 
     /*
      * The major/minor tuple of the currently mounted filesystem.
@@ -71,6 +72,8 @@
     virtual void handleVolumeShared();
     virtual void handleVolumeUnshared();
 
+    void setDebug(bool enable);
+
 protected:
     void setState(int state);