--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/userlibandfileserver/fileserver/shostmassstorage/server/protocol/tblocktransfer.cpp Mon Oct 19 15:55:17 2009 +0100
@@ -0,0 +1,254 @@
+// 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:
+//
+
+/**
+ @file
+ @internalTechnology
+*/
+
+#include <e32def.h>
+#include <e32def_private.h>
+#include <e32std.h>
+#include <e32std_private.h>
+#include <e32base.h>
+#include <e32base_private.h>
+#include "msctypes.h"
+
+#include "mblocktransferprotocol.h"
+#include "tblocktransfer.h"
+#include "debug.h"
+#include "msdebug.h"
+
+
+/**
+Manage a read from a block device.
+
+@param aProtocol A reference to object providing protocol read method
+@param aPosition The position to start reading from
+@param aLength The length of data to read
+@param aBuf Buffer to copy the data to
+*/
+void TBlockTransfer::ReadL(MBlockTransferProtocol& aProtocol,
+ TPos aPosition,
+ TInt aLength,
+ TDes8& aBuf)
+ {
+ __MSFNLOG
+ __HOSTPRINT1(_L("blocklen = 0%lx"), iBlockLength);
+
+ TInt copylen = 0;
+ TInt headlen = 0;
+
+ aBuf.SetLength(0);
+ TPos headOffset = GetHeadBlockOffset(aPosition);
+ /**** READ10 HEAD ****/
+ if (headOffset)
+ {
+ TPos headpos = aPosition - headOffset;
+ RBuf8 headbuf;
+ CleanupClosePushL(headbuf);
+ headbuf.Create(iBlockLength);
+
+ headlen = ((headOffset + aLength - 1) / iBlockLength) == 0 ? aLength : (iBlockLength - headOffset);
+
+ __HOSTPRINT2(_L("\tRead head pos = 0%lx length = 0%lx"),
+ headpos, iBlockLength);
+ aProtocol.BlockReadL(headpos, headbuf, iBlockLength);
+ aBuf.Append(headbuf.Ptr() + headOffset, headlen);
+ CleanupStack::PopAndDestroy(&headbuf);
+ }
+
+ /**** READ10 BODY ****/
+ TInt blocksInMain = (aLength - headlen)/iBlockLength;
+ if (blocksInMain)
+ {
+ copylen = blocksInMain * iBlockLength;
+ __HOSTPRINT2(_L("\tRead main pos = 0%lx length = 0x%x"),
+ aPosition+headlen, copylen);
+ aProtocol.BlockReadL(aPosition+headlen, (TDes8 &)aBuf, copylen);
+ }
+
+ copylen += headlen;
+
+ /**** READ10 TAIL ****/
+ TInt tailLen = aLength - copylen;
+ if ((tailLen) != 0)
+ {
+ RBuf8 tailbuf;
+ CleanupClosePushL(tailbuf);
+ tailbuf.Create(iBlockLength);
+
+ __HOSTPRINT2(_L("\tRead tail pos = 0%lx length = 0%lx"),
+ aPosition+copylen, iBlockLength);
+ aProtocol.BlockReadL(aPosition+copylen, tailbuf, iBlockLength);
+ aBuf.Append(tailbuf.Ptr(), tailLen);
+
+ CleanupStack::PopAndDestroy(&tailbuf);
+ }
+ }
+
+
+/**
+Manage a write to a block device
+
+@param aProtocol A reference to object providing protocol read method
+@param aPosition The position to start reading from
+@param aLength The length of data to read
+@param aBuf Buffer containing the data to write
+*/
+void TBlockTransfer::WriteL(MBlockTransferProtocol& aProtocol,
+ TPos aPosition,
+ TInt aLength,
+ TDesC8& aBuf)
+ {
+ __MSFNLOG
+ TInt copylen = 0;
+ TInt headlen = 0;
+
+ TPos headOffset = GetHeadBlockOffset(aPosition);
+ /**** WRITE10 HEAD ****/
+ if (headOffset)
+ {
+ TPos headpos = aPosition - headOffset;
+
+ RBuf8 headbuf;
+ CleanupClosePushL(headbuf);
+ headbuf.Create(iBlockLength);
+
+ RBuf8 buf;
+ CleanupClosePushL(buf);
+ buf.Create(iBlockLength);
+
+ headlen = ((headOffset + aLength - 1) / iBlockLength) == 0 ? aLength : (iBlockLength - headOffset);
+
+ __HOSTPRINT2(_L("\tWrite-Read head pos = 0%lx length = 0%lx"),
+ headpos, iBlockLength);
+
+ aProtocol.BlockReadL(headpos, headbuf, iBlockLength);
+ /* get head */
+ __HOSTPRINT2(_L("\tcopying read data pos = 0%lx offset = 0%lx"),
+ headpos, headOffset);
+ buf.Append(headbuf.Ptr(), headOffset);
+
+ /* get body */
+ buf.Append(aBuf.Ptr(), headlen);
+
+ /* Is it a short write and tail exist? */
+ TInt headEndOffset = headOffset + headlen;
+ if (headEndOffset != iBlockLength)
+ {
+ TInt len = iBlockLength - headEndOffset;
+
+ __HOSTPRINT2(_L("\t(short write) copying read data pos = 0%lx length = %08x"),
+ (headpos + headEndOffset), len);
+ buf.Append(headbuf.Ptr() + headEndOffset, len);
+ }
+
+ __HOSTPRINT2(_L("\tWrite head pos = 0%lx length = %08x"),
+ headpos, headlen);
+
+ aProtocol.BlockWriteL(headpos, (TDes8 &)buf, 0, iBlockLength);
+
+ CleanupStack::PopAndDestroy(&buf);
+ CleanupStack::PopAndDestroy(&headbuf);
+ }
+
+ /**** WRITE10 BODY ****/
+ TPos blocksInMain = (aLength - headlen)/iBlockLength;
+ if (blocksInMain)
+ {
+ copylen = blocksInMain * iBlockLength;
+
+ const TUint64 pos = aPosition + headlen;
+ __HOSTPRINT2(_L("\tWrite main pos = 0%lx length = %08x"),
+ pos, copylen);
+
+ /* form the body */
+ aProtocol.BlockWriteL(pos, (TDes8 &)aBuf, headlen, copylen);
+ }
+
+ copylen += headlen;
+
+ /**** WRITE10 TAIL ****/
+ TInt tailLen = aLength - copylen;;
+ if (tailLen != 0)
+ {
+ RBuf8 buf;
+ CleanupClosePushL(buf);
+ buf.Create(iBlockLength);
+
+ RBuf8 tailbuf;
+ CleanupClosePushL(tailbuf);
+ tailbuf.Create(iBlockLength);
+
+ const TUint64 pos = aPosition + copylen;
+
+ __HOSTPRINT2(_L("\tWrite-Read tail pos = 0%lx length = %08x"),
+ pos, iBlockLength);
+
+ aProtocol.BlockReadL(pos, tailbuf, iBlockLength);
+ /* get head */
+ buf.Append(aBuf.Ptr() + copylen, tailLen);
+ /* get tail */
+ buf.Append(tailbuf.Ptr() + tailLen, iBlockLength - tailLen);
+
+ aProtocol.BlockWriteL(pos, (TDes8 &)buf, 0, iBlockLength);
+
+ CleanupStack::PopAndDestroy(&tailbuf);
+ CleanupStack::PopAndDestroy(&buf);
+ }
+ }
+
+
+void TBlockTransfer::SetCapacity(TUint32 aBlockLength, TLba aLastLba)
+ {
+ __MSFNLOG
+ iBlockLength = static_cast<TInt64>(aBlockLength);
+ iLastLba = aLastLba;
+ }
+
+
+TPos TBlockTransfer::GetHeadBlockOffset(TPos aPos)
+ {
+ __MSFNLOG
+ return (aPos % iBlockLength);
+ }
+
+TLba TBlockTransfer::GetHeadBlockLbaL(TPos aPos)
+ {
+ __MSFNLOG
+ TLba lba = I64LOW(aPos / iBlockLength);
+ if (lba > iLastLba)
+ User::Leave(KErrArgument);
+ return lba;
+ }
+
+TPos TBlockTransfer::GetTailBlockOffset(TPos aPos, TInt aLen)
+ {
+ __MSFNLOG
+ return ((aPos + aLen) % iBlockLength);
+ }
+
+TLba TBlockTransfer::GetTailBlockLbaL(TPos aPos, TInt aLen)
+ {
+ __MSFNLOG
+ TLba lba = I64LOW((aPos + aLen) / iBlockLength);
+ if (lba > iLastLba)
+ User::Leave(KErrArgument);
+ return lba;
+ }
+
+
+