diff -r 000000000000 -r bde4ae8d615e os/kernelhwsrv/userlibandfileserver/fileserver/shostmassstorage/shared/msgservice.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/os/kernelhwsrv/userlibandfileserver/fileserver/shostmassstorage/shared/msgservice.h	Fri Jun 15 03:10:57 2012 +0200
@@ -0,0 +1,66 @@
+// Copyright (c) 2008-2009 Nokia Corporation and/or its subsidiary(-ies).
+// All rights reserved.
+// This component and the accompanying materials are made available
+// under the terms of the License "Eclipse Public License v1.0"
+// which accompanies this distribution, and is available
+// at the URL "http://www.eclipse.org/legal/epl-v10.html".
+//
+// Initial Contributors:
+// Nokia Corporation - initial contribution.
+//
+// Contributors:
+//
+// Description:
+// Shared message service definitions 
+// 
+//
+
+/**
+ @file
+ @internalTechnology
+*/
+
+#ifndef __HOSTUSBMSMSGSERVICE_H__
+#define __HOSTUSBMSMSGSERVICE_H__
+
+/**
+Package structure for a Read or Write request
+*/
+struct TReadWrite
+    {
+    /** position */
+	TInt64 iPos;
+    /** Length */
+	TInt iLen;
+    };
+
+
+const TInt KUsbHostMsSrvMajorVersionNumber = 1;
+const TInt KUsbHostMsSrvMinorVersionNumber = 0;
+const TInt KUsbHostMsSrvBuildVersionNumber = 0;
+
+_LIT(KUsbHostMsServerName, "usbhostmssrv");
+
+/** Types of requests Host USB mass storage file extention and MM can make */
+enum TUsbHostMsReqType
+	{
+	EUsbHostMsRegisterInterface,	// Adds the mass storage device to the server
+	EUsbHostMsInitialiseInterface,	// Initialises the interface with the transport and setsup async call for GetMaxLun
+	EUsbHostMsUnRegisterInterface,	// Removes the mass storage device from the server
+	EUsbHostMsFinalCleanup,	// Called after unregistering the interface to cleanup any final bits in the session
+	EUsbHostMsGetNumLun,	// Gets the maximum lun for found in the MS device
+	EUsbHostMsRegisterLun,	// Opens a subsession and registers the LunId
+	EUsbHostMsUnRegisterLun,// Closes the subsession
+	EUsbHostMsShutdown,		// Shuts down the server
+	EUsbHostMsNotifyChange,	// Registers with MSC to get any media change notifications
+	EUsbHostMsSuspendLun,	// Requests MSC to suspend the logical unit and registers with MSC to invoke when resumed
+	EUsbHostMsCapacity,		// Get the logical unit or device capacity
+	EUsbHostMsRead,			// Do a read on the logical unit or device
+	EUsbHostMsWrite,		// Do a write to the logical unit or device
+    EUsbHostMsErase,        // Erase an area on the logical unit or device
+    EUsbHostMsForceRemount, // Force a remount of the drive
+	EUsbHostMsCancelChangeNotifier, // Cancel the media change notifier
+	EUsbHostMsLast		    // This should always be at the end of the enum
+	};
+
+#endif //__HOSTUSBMSMSGSERVICE_H__