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/CommandListener.h b/CommandListener.h
index 8861e38..ca4fc97 100644
--- a/CommandListener.h
+++ b/CommandListener.h
@@ -26,6 +26,14 @@
     virtual ~CommandListener() {}
 
 private:
+    static void dumpArgs(int argc, char **argv, int argObscure);
+
+    class DumpCmd : public VoldCommand {
+    public:
+        DumpCmd();
+        virtual ~DumpCmd() {}
+        int runCommand(SocketClient *c, int argc, char ** argv);
+    };
 
     class VolumeCmd : public VoldCommand {
     public: