diff -r 43365a9b78a3 -r d8d70de2bd36 userlibandfileserver/fileserver/sfile/sf_plugin.h
--- a/userlibandfileserver/fileserver/sfile/sf_plugin.h	Tue Jul 06 15:50:07 2010 +0300
+++ b/userlibandfileserver/fileserver/sfile/sf_plugin.h	Wed Aug 18 11:08:29 2010 +0300
@@ -21,7 +21,7 @@
 
 #include "message.h"
 #include <f32fsys.h>
-#include <F32plugin.h>
+#include <f32plugin.h>
 
 class CFsSyncMessageScheduler;
 class CFsInternalRequest;
@@ -60,8 +60,8 @@
 	static TInt InstallPluginFactory(CFsPluginFactory* aFactory,RLibrary aLib);
 	static CFsPluginFactory* GetPluginFactory(const TDesC& aName);
 
-	static TInt NextPlugin(CFsPlugin*& aPlugin, CFsMessageRequest* aMsgRequest, TBool aLock, TBool aCheckCurrentOperation=ETrue);
-	static TInt PrevPlugin(CFsPlugin*& aPlugin, CFsMessageRequest* aMsgRequest, TBool aLock);
+	static TInt NextPlugin(CFsPlugin*& aPlugin, CFsMessageRequest* aMsgRequest, TBool aCheckCurrentOperation=ETrue);
+	static TInt PrevPlugin(CFsPlugin*& aPlugin, CFsMessageRequest* aMsgRequest);
 	static TInt InsertInPluginStack(CFsPlugin*& aPlugin,TInt aPos);
 	static TInt IsInChain(TInt aUPos, TInt aPos,TInt aDrive, CFsPluginFactory* aPluginFactory);
 	static CFsPlugin* FindByUniquePosition(TInt aPos);
@@ -72,7 +72,8 @@
 	static TInt ChainCount();
 	static TInt Plugin(CFsPlugin*& aPlugin, TInt aPos);
 
-	static void LockChain();
+	static void ReadLockChain();
+	static void WriteLockChain();
 	static void UnlockChain();
 
 	static CFsPluginConn* CreatePluginConnL(TInt aUniquePosition, TUint aClientId);
@@ -91,7 +92,7 @@
 	static CFsObjectCon* iPluginConns;
 
 	static RPointerArray<CFsPlugin> iPluginChain;
-	static RFastLock iChainLock;
+	static RReadWriteLock iChainLock;
 
 	static CFsSyncMessageScheduler* iScheduler;