--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/userlibandfileserver/fileserver/sfile/sf_plugin_ops.cpp	Mon Oct 19 15:55:17 2009 +0100
@@ -0,0 +1,397 @@
+// Copyright (c) 1995-2009 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:
+// f32\sfile\sf_plugin_ops.cpp
+// 
+//
+
+#include "sf_std.h"
+#include "sf_plugin_priv.h"
+#include "sf_file_cache.h"
+
+/**
+Platform security check
+*/
+TInt TFsAddPlugin::Initialise(CFsRequest* aRequest)
+	{
+	if (!KCapFsPlugin.CheckPolicy(aRequest->Message(), __PLATSEC_DIAGNOSTIC_STRING("Mount Plugin")))
+		return KErrPermissionDenied;
+
+	return(KErrNone);
+	}
+
+/**
+Adds the plugin and installs plugin factory
+*/
+TInt TFsAddPlugin::DoRequestL(CFsRequest* aRequest)
+	{
+	__PRINT(_L("TFsAddPlugin::DoRequestL(CFsRequest* aRequest)"));
+	
+	RLibrary lib;
+	lib.SetHandle(aRequest->Message().Int0());				
+	if (lib.Type()[1]!=TUid::Uid(KFileSystemUidValue))		
+		return KErrNotSupported;
+
+	TPluginNew e=(TPluginNew)lib.Lookup(1);					
+	if (!e)
+		return KErrCorrupt;
+
+	CFsPluginFactory* pF=(*e)();
+	if(!pF)													
+		return KErrNoMemory;
+	
+	TInt r = FsPluginManager::InstallPluginFactory(pF,lib);
+	return(r);
+	}
+
+/**
+Platform security checking
+*/
+TInt TFsRemovePlugin::Initialise(CFsRequest* aRequest)
+	{
+	if (!KCapFsPlugin.CheckPolicy(aRequest->Message(), __PLATSEC_DIAGNOSTIC_STRING("Mount Plugin")))
+		return KErrPermissionDenied;
+	return KErrNone;
+	}
+
+/**
+Removes the plugin from session. Can't remove if have plugin mounted. 
+*/
+TInt TFsRemovePlugin::DoRequestL(CFsRequest* aRequest)
+	{
+	TFullName name;
+	aRequest->ReadL(KMsgPtr0,name);	
+	
+	CFsPluginFactory* pF = FsPluginManager::GetPluginFactory(name);			
+	if (pF==NULL)								
+		return(KErrNotFound);
+
+	// Check if any plugin is mounted in the chain
+	if(pF->MountedPlugins()!=0)
+		return KErrInUse;	
+
+	TInt r=pF->Remove();						
+	if (r!=KErrNone)
+		return(r);
+	RLibrary lib=pF->Library();					
+	pF->Close();								
+	lib.Close();								
+	return(KErrNone);
+	}
+
+/**
+Platform security check.
+Finding the plugin factory & checking if the drive supports the plugin
+*/
+TInt TFsMountPlugin::Initialise(CFsRequest* aRequest)
+	{
+	
+	if (!KCapFsPlugin.CheckPolicy(aRequest->Message(), __PLATSEC_DIAGNOSTIC_STRING("Mount Plugin")))
+		return KErrPermissionDenied;
+	
+	TFullName pluginName;
+	TRAPD(err,aRequest->ReadL(KMsgPtr0,pluginName));
+	if(err != KErrNone)
+		return err;
+
+	CFsPluginFactory* pF = FsPluginManager::GetPluginFactory(pluginName);
+	if (pF==NULL)
+		return(KErrNotFound);
+
+	if(pF->IsDriveSupported(aRequest->Message().Int1()) == EFalse)
+		return KErrNotSupported;
+
+	aRequest->SetScratchValue((TUint)pF);
+
+	return KErrNone;
+	}
+
+/**
+Mounts the plugin
+*/
+TInt TFsMountPlugin::DoRequestL(CFsRequest* aRequest)
+	{
+	CFsPluginFactory* pF = (CFsPluginFactory*)aRequest->ScratchValue();
+	if(pF == NULL)
+		return KErrNotFound;
+
+	// empty the closed file queue
+	TClosedFileUtils::Remove();
+
+	TInt err = FsPluginManager::MountPlugin(*pF,aRequest->Message().Int1(),aRequest->Message().Int2());
+	return err;
+	}
+
+/**
+Platform security check.
+Finding the plugin factory & checking if the drive supports the plugin
+*/
+TInt TFsDismountPlugin::Initialise(CFsRequest* aRequest)
+	{
+	if (!KCapFsPlugin.CheckPolicy(aRequest->Message(), __PLATSEC_DIAGNOSTIC_STRING("Mount Plugin")))
+		return KErrPermissionDenied;
+
+	TFullName name;
+	TRAPD(err, aRequest->ReadL(KMsgPtr0,name));					//get plugin name
+	if(err!=KErrNone)
+		return err;
+
+	TInt drive = aRequest->Message().Int1();
+	CFsPluginFactory* pF = FsPluginManager::GetPluginFactory(name);				
+	if (!pF || pF->MountedPlugins()==0)
+		return(KErrNotFound);
+	if(pF->IsDriveSupported(drive) == EFalse)
+		return KErrNotSupported;
+
+	FsPluginManager::LockChain();
+	err = FsPluginManager::IsInChain(pF->UniquePosition(),aRequest->Message().Int2(),aRequest->Message().Int1(), pF);
+
+	// plugin might have been mounted in different pos and drive. Find the right one
+	if(err >= 0)
+		{
+		TInt pos = err;
+		CFsPlugin* plugin = NULL;
+		err = FsPluginManager::Plugin(plugin, pos);
+		if(err == KErrNone)
+			{
+			//If we're version2 plugin, and we're dismounting a single drive
+			// but we're mounted on many drives, then
+			// just remove drive from iMountedOn and return KErrCompletion.
+			//
+			//NB: Already checked that we're mounted on 'drive' in IsInChain
+			
+			if(pF->SupportedDrives()&KPluginVersionTwo && drive!=KPluginAutoAttach)
+				{
+				//Special Case:
+				//Z Drive
+				if(drive==KPluginMountDriveZ)
+					{
+					drive = 25;
+					}
+				
+				//Are we mounted on many drives?
+				if((plugin->iMountedOn&(~1<<drive)) > 0) //without 'drive' is there still a drive set?
+					{
+					plugin->iMountedOn &= ~1<<drive;
+					FsPluginManager::UnlockChain();
+					return KErrCompletion; //don't go to dorequestl
+					}
+				}
+			
+			plugin->RegisterIntercept(EFsDismountPlugin, CFsPlugin::EPreIntercept);
+			aRequest->SetScratchValue((TUint)pF);
+			}
+		}
+	// pos contains an error code
+	FsPluginManager::UnlockChain();
+	return err;
+	}
+
+/**
+Dismount the plugin from the stack
+*/
+TInt TFsDismountPlugin::DoRequestL(CFsRequest* aRequest)
+	{
+
+	CFsPluginFactory* pF = (CFsPluginFactory*)aRequest->ScratchValue();
+	if(pF == NULL)
+		return KErrNone;	// The plugin has already been dismounted
+
+	TInt drive = aRequest->Message().Int1();
+
+	FsPluginManager::LockChain();
+
+	TInt err = FsPluginManager::IsInChain(pF->UniquePosition(),aRequest->Message().Int2(),drive, pF);
+	if(err >= 0)
+		{
+		TInt pos = err;
+		CFsPlugin* plugin = NULL;
+		err = FsPluginManager::Plugin(plugin, pos);
+		if(err == KErrNone)
+			{
+			if(aRequest->iCurrentPlugin == plugin)
+				{
+				FsPluginManager::DismountPlugin(*pF,pos);
+				aRequest->SetScratchValue(0);
+				}
+			}
+		}
+	FsPluginManager::UnlockChain();
+	return err;
+	}
+
+
+/**
+Validates the drive
+*/
+TInt TFsPluginName::Initialise(CFsRequest* aRequest)
+	{
+	TInt r=ValidateDrive(aRequest->Message().Int1(),aRequest);
+	if(r!=KErrNone)
+		return r;
+	if(aRequest->Drive()->IsSubsted())
+		return KErrNotSupported;
+	return r;
+	}
+
+/**
+Return the name of a plugin for a given drive and plugin chain position
+*/
+TInt TFsPluginName::DoRequestL(CFsRequest* aRequest)
+	{
+	CFsPlugin* plugin=NULL;
+	FsPluginManager::LockChain();
+	TInt err = FsPluginManager::Plugin(plugin, aRequest->Message().Int2());
+	if(err != KErrNone)
+		return err;
+
+	TInt r = KErrNotFound;
+	if(plugin)
+		{
+		aRequest->WriteL(KMsgPtr0, plugin->Name());
+		r = KErrNone;
+		}
+	FsPluginManager::UnlockChain();
+	return r;
+	}
+/**
+Open a plugin
+*/
+TInt TFsPluginOpen::Initialise(CFsRequest* aRequest)
+	{
+	TInt pluginPos = aRequest->Message().Int0();
+	CFsPlugin* pP = FsPluginManager::FindByUniquePosition(pluginPos);
+	if(pP == NULL)
+		return KErrNotFound;
+
+	aRequest->iCurrentPlugin = pP;
+	aRequest->SetDriveNumber(-1);
+	
+	RThread thread;
+	aRequest->Message().Client(thread, EOwnerThread);
+	aRequest->SetScratchValue((TUint)(thread.Id()));
+	thread.Close();
+	
+	return KErrNone;
+	}
+
+/**
+open the plugin
+*/
+TInt TFsPluginOpen::DoRequestL(CFsRequest* aRequest)
+	{
+	TInt pluginPos = aRequest->Message().Int0();
+	CFsPluginConn* pC = FsPluginManager::CreatePluginConnL(pluginPos, aRequest->ScratchValue());
+
+	TInt handle = aRequest->Session()->Handles().AddL(pC,ETrue);
+	TPtrC8 pH((TUint8*)&handle, sizeof(TInt));
+	aRequest->WriteL(KMsgPtr3, pH);
+	aRequest->Session()->IncResourceCount();
+	
+	return KErrNone;
+	}
+
+/**
+Initialising the plugin control
+*/
+LOCAL_C TInt InitPluginControl(CFsRequest* aRequest)
+	{
+	CFsPluginConn* pC = FsPluginManager::GetPluginConnFromHandle(aRequest->Session(), aRequest->Message().Int3());
+	if(pC == NULL)
+		return KErrBadHandle;
+
+	aRequest->iCurrentPlugin = pC->Plugin();
+	aRequest->SetDriveNumber(-1);
+
+	CFsPluginConnRequest* request = new CFsPluginConnRequest(pC);
+	if(request == NULL)
+		return KErrNoMemory;
+
+	aRequest->SetScratchValue((TUint)request);
+	return KErrNone;
+	}
+
+/**
+Initialises the plugin control and gets the request
+*/
+TInt TFsPluginDoControl::Initialise(CFsRequest* aRequest)
+	{
+	TInt err = InitPluginControl(aRequest);
+	if(err != KErrNone)
+		return err;
+
+	CFsPluginConnRequest* request = (CFsPluginConnRequest*)aRequest->ScratchValue();
+	return request->InitControl(aRequest);
+	}
+
+/**
+does handle the control request
+*/
+TInt TFsPluginDoControl::DoRequestL(CFsRequest* aRequest)
+	{
+	CFsPluginConnRequest* pRequest = (CFsPluginConnRequest*)aRequest->ScratchValue();	
+	TInt r = pRequest->DoControl();
+	delete pRequest;
+	return r;
+	}
+
+
+/**
+Initialises the request 
+*/
+TInt TFsPluginDoRequest::Initialise(CFsRequest* aRequest)
+	{
+	TInt err = InitPluginControl(aRequest);
+	if(err != KErrNone)
+		return err;
+
+	CFsPluginConnRequest* request = (CFsPluginConnRequest*)aRequest->ScratchValue();
+	return request->InitRequest(aRequest);
+	}
+
+/**
+Handles the request adding it to the queue of the requests
+*/
+TInt TFsPluginDoRequest::DoRequestL(CFsRequest* aRequest)
+	{
+	CFsPluginConnRequest* pRequest = (CFsPluginConnRequest*)aRequest->ScratchValue();	
+	pRequest->DoRequest();
+	return KErrNone;
+	}
+
+/**
+Initialises the request
+*/
+TInt TFsPluginDoCancel::Initialise(CFsRequest* aRequest)
+	{
+	CFsPluginConn* pC = FsPluginManager::GetPluginConnFromHandle(aRequest->Session(), aRequest->Message().Int3());
+	if(pC == NULL)
+		return KErrBadHandle;
+
+	aRequest->iCurrentPlugin = pC->Plugin();
+	aRequest->SetDriveNumber(-1);
+	aRequest->SetScratchValue((TUint)pC);
+	
+	return KErrNone;
+	}
+
+/**
+Cancels the outstanding request
+*/
+TInt TFsPluginDoCancel::DoRequestL(CFsRequest* aRequest)
+	{
+	CFsPluginConn* pC = (CFsPluginConn*)aRequest->ScratchValue();	
+	pC->DoCancel(aRequest->Message().Int0());
+	return KErrNone;
+	}
+