--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/userlibandfileserver/fileserver/sfat/sl_fat16.cpp Thu Dec 17 09:24:54 2009 +0200
@@ -0,0 +1,629 @@
+// Copyright (c) 1996-2009 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\sfat\sl_fat16.cpp
+//
+//
+//!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
+//!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
+//!!
+//!! WARNING!! DO NOT edit this file !! '\sfat' component is obsolete and is not being used. '\sfat32'replaces it
+//!!
+//!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
+//!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
+
+
+#include "sl_std.h"
+#include "sl_cache.h"
+
+const TUint KDefFatResvdSec = 1; ///< default number of FAT12/16 reserved sectors
+
+/**
+Initialize the format parameters for a normal fixed sized disk
+Setting set to adhere to Rules of Count of clusters for FAT type
+
+@param aDiskSizeInSectors Size of volume in sectors
+@return system-wide error code
+*/
+TInt CFatFormatCB::InitFormatDataForFixedSizeDiskNormal(TInt aDiskSizeInSectors, const TLocalDriveCapsV6& aCaps)
+ {
+ if( Drive().IsRemovable() )
+ iNumberOfFats = KNumberOfFatsExternal;
+ else
+ iNumberOfFats = KNumberOfFatsInternal;
+
+ iReservedSectors=KDefFatResvdSec;
+ if (aDiskSizeInSectors<4084*1) // < 2MB
+ {
+ iRootDirEntries=128;
+ iSectorsPerCluster=1;
+ iFileSystemName=KFileSystemName12;
+ iSectorsPerFat=MaxFat12Sectors();
+ }
+ else if (aDiskSizeInSectors<4084*2) // < 4MB (8168 sectors)
+ {
+ iRootDirEntries=256;
+ iSectorsPerCluster=2;
+ iFileSystemName=KFileSystemName12;
+ iSectorsPerFat=MaxFat12Sectors();
+ }
+ else if (aDiskSizeInSectors<4084*4) // < 8MB (16336 sectors)
+ {
+ iRootDirEntries=512;
+ iSectorsPerCluster=4;
+ iFileSystemName=KFileSystemName12;
+ iSectorsPerFat=MaxFat12Sectors();
+ }
+ else if (aDiskSizeInSectors<4084*8) // < 16MB (32672 sectors)
+ {
+ iRootDirEntries=512;
+ iSectorsPerCluster=8;
+ iFileSystemName=KFileSystemName12;
+ iSectorsPerFat=MaxFat12Sectors();
+ }
+ else // >= 16Mb - FAT16
+ {
+ iFileSystemName=KFileSystemName16;
+ TInt minSectorsPerCluster=(aDiskSizeInSectors+KMaxFAT16Entries-1)/KMaxFAT16Entries;
+ iRootDirEntries=512;
+ iSectorsPerCluster=1;
+ while (minSectorsPerCluster>iSectorsPerCluster)
+ iSectorsPerCluster<<=1;
+ iSectorsPerFat=MaxFat16Sectors();
+ }
+
+ // Ensure cluster size is a multiple of the block size
+ TInt blockSizeInSectors = aCaps.iBlockSize >> iSectorSizeLog2;
+ __PRINT1(_L("blockSizeInSectors: %d"),blockSizeInSectors);
+ ASSERT(blockSizeInSectors == 0 || IsPowerOf2(blockSizeInSectors));
+ if (blockSizeInSectors != 0 && IsPowerOf2(blockSizeInSectors))
+ {
+ __PRINT1(_L("iSectorsPerCluster (old): %d"),iSectorsPerCluster);
+ AdjustClusterSize(blockSizeInSectors);
+ __PRINT1(_L("iSectorsPerCluster (new): %d"),iSectorsPerCluster);
+ }
+
+ // Align first data sector on an erase block boundary if
+ // (1) the iEraseBlockSize is specified
+ // (2) the start of the partition is already aligned to an erase block boundary,
+ // i.e. iHiddenSectors is zero or a multiple of iEraseBlockSize
+ __PRINT1(_L("iHiddenSectors: %d"),iHiddenSectors);
+ TInt eraseblockSizeInSectors = aCaps.iEraseBlockSize >> iSectorSizeLog2;
+ __PRINT1(_L("eraseblockSizeInSectors: %d"),eraseblockSizeInSectors);
+ ASSERT(eraseblockSizeInSectors == 0 || IsPowerOf2(eraseblockSizeInSectors));
+ ASSERT(eraseblockSizeInSectors == 0 || eraseblockSizeInSectors >= blockSizeInSectors);
+ if ((eraseblockSizeInSectors != 0) &&
+ (iHiddenSectors % eraseblockSizeInSectors == 0) &&
+ (IsPowerOf2(eraseblockSizeInSectors)) &&
+ (eraseblockSizeInSectors >= blockSizeInSectors))
+ {
+ TInt r = AdjustFirstDataSectorAlignment(eraseblockSizeInSectors);
+ ASSERT(r == KErrNone);
+ (void) r;
+ }
+ __PRINT1(_L("iReservedSectors: %d"),iReservedSectors);
+ __PRINT1(_L("FirstDataSector: %d"), FirstDataSector());
+
+ return KErrNone;
+ }
+
+TInt CFatFormatCB::FirstDataSector() const
+ {
+ TInt rootDirSectors = (iRootDirEntries * KSizeOfFatDirEntry + (iBytesPerSector-1)) / iBytesPerSector;
+ return iHiddenSectors + iReservedSectors + iNumberOfFats*iSectorsPerFat + rootDirSectors;
+ }
+
+void CFatFormatCB::AdjustClusterSize(TInt aRecommendedSectorsPerCluster)
+ {
+ const TInt KMaxSecPerCluster = 64; // 32K
+ while (aRecommendedSectorsPerCluster > iSectorsPerCluster && iSectorsPerCluster <= (KMaxSecPerCluster/2))
+ iSectorsPerCluster<<= 1;
+ }
+
+// AdjustFirstDataSectorAlignment()
+// Attempts to align the first data sector on an erase block boundary by modifying the
+// number of reserved sectors.
+TInt CFatFormatCB::AdjustFirstDataSectorAlignment(TInt aEraseBlockSizeInSectors)
+ {
+ const TBool bFat16 = Is16BitFat();
+
+ // Save these 2 values in the event of a convergence failure; this should
+ // hopefully never happen, but we will cater for this in release mode to be safe,
+ TInt reservedSectorsSaved = iReservedSectors;
+ TInt sectorsPerFatSaved = iSectorsPerFat;
+
+ TInt reservedSectorsOld = 0;
+
+ // zero for FAT32
+ TInt rootDirSectors = (iRootDirEntries * KSizeOfFatDirEntry + (iBytesPerSector-1)) / iBytesPerSector;
+ TInt fatSectors = 0;
+
+ TInt KMaxIterations = 10;
+ TInt n;
+ for (n=0; n<KMaxIterations && reservedSectorsOld != iReservedSectors; n++)
+ {
+ reservedSectorsOld = iReservedSectors;
+
+ iSectorsPerFat = bFat16 ? MaxFat16Sectors() : MaxFat12Sectors();
+
+ fatSectors = iSectorsPerFat * iNumberOfFats;
+
+ // calculate number of blocks
+ TInt nBlocks = (iReservedSectors + fatSectors + rootDirSectors + aEraseBlockSizeInSectors-1) / aEraseBlockSizeInSectors;
+
+ iReservedSectors = (nBlocks * aEraseBlockSizeInSectors) - rootDirSectors - fatSectors;
+ }
+
+ ASSERT(iReservedSectors >= (TInt) KDefFatResvdSec);
+
+ if ((FirstDataSector() & (aEraseBlockSizeInSectors-1)) == 0)
+ {
+ return KErrNone;
+ }
+ else
+ {
+ iReservedSectors = reservedSectorsSaved;
+ iSectorsPerFat = sectorsPerFatSaved;
+ return KErrGeneral;
+ }
+ }
+
+/**
+ Initialize the user specific format parameters for fixed sized disk.
+
+ @param aDiskSizeInSectors disk size in sectors
+ @return system-wide error code
+*/
+TInt CFatFormatCB::InitFormatDataForFixedSizeDiskUser(TInt aDiskSizeInSectors)
+ {
+ //-- KErrArgument will be returned if iSpecialInfo().iFATBits isn't one of EFB32, EFB16, EFB32
+
+ if(iSpecialInfo().iFlags & TLDFormatInfo::EOneFatTable)
+ iNumberOfFats = 1;
+ else if(iSpecialInfo().iFlags & TLDFormatInfo::ETwoFatTables)
+ iNumberOfFats = 2;
+ else if(Drive().IsRemovable())
+ iNumberOfFats = KNumberOfFatsExternal;
+ else
+ iNumberOfFats = KNumberOfFatsInternal;
+
+
+ if(iSpecialInfo().iReservedSectors == 0)
+ iReservedSectors = KDefFatResvdSec; //-- user hasn't specified reserved sectors count, use default (FAT12/16)
+ else
+ iReservedSectors = iSpecialInfo().iReservedSectors;
+
+
+ const TInt KMaxSecPerCluster = 64;
+ const TInt KDefaultSecPerCluster= 8; //-- default value, if the iSpecialInfo().iSectorsPerCluster isn't specified
+
+ iSectorsPerCluster = iSpecialInfo().iSectorsPerCluster;
+ if(iSectorsPerCluster <= 0)
+ {//-- default value, user hasn't specified TLDFormatInfo::iSectorsPerCluster
+ iSectorsPerCluster = KDefaultSecPerCluster; //-- will be adjusted later
+ }
+ else
+ {
+ iSectorsPerCluster = Min(1<<Log2(iSectorsPerCluster), KMaxSecPerCluster);
+ }
+
+ //-----------------------------------------
+
+ if (aDiskSizeInSectors < 4096) // < 2MB
+ {
+ iSectorsPerCluster = 1;
+ iRootDirEntries = 128;
+ }
+ else if (aDiskSizeInSectors < 8192) // < 4MB
+ {
+ iSectorsPerCluster = Min(iSectorsPerCluster, 2);
+ iRootDirEntries = 256;
+ }
+ else if (aDiskSizeInSectors < 32768) // < 16MB
+ {
+ iSectorsPerCluster = Min(iSectorsPerCluster, 4);
+ iRootDirEntries = 512;
+ }
+ else if (aDiskSizeInSectors < 131072) // < 64MB
+ {
+ iSectorsPerCluster = Min(iSectorsPerCluster, 8);
+ iRootDirEntries = 512;
+ }
+ else // >= 64Mb
+ iRootDirEntries = 512;
+
+ //-----------------------------------------
+
+ TLDFormatInfo::TFATBits fatBits = iSpecialInfo().iFATBits;
+ if (fatBits == TLDFormatInfo::EFBDontCare)
+ {
+ const TFatType fatType = SuggestFatType();
+ switch(fatType)
+ {
+ case EFat12:
+ fatBits = TLDFormatInfo::EFB12;
+ break;
+ case EFat16:
+ fatBits = TLDFormatInfo::EFB16;
+ break;
+ case EFat32:
+ fatBits = TLDFormatInfo::EFB32;
+ break;
+ case EInvalid:
+ ASSERT(0);
+ }
+ }
+
+ TFatType reqFatType(EInvalid); //-- requested FAT type
+
+ switch (fatBits)
+ {
+ case TLDFormatInfo::EFB12:
+ iFileSystemName=KFileSystemName12;
+ iSectorsPerFat=MaxFat12Sectors();
+ reqFatType = EFat12;
+ break;
+
+ case TLDFormatInfo::EFB16:
+ iFileSystemName=KFileSystemName16;
+ iSectorsPerFat=MaxFat16Sectors();
+ reqFatType = EFat16;
+ break;
+
+ case TLDFormatInfo::EFB32:
+ __PRINT(_L("CFatFormatCB::InitFormatDataForFixedSizeDiskUser() FAT32 Not supported!"));
+ return KErrNotSupported;
+
+ default:
+ __PRINT(_L("CFatFormatCB::InitFormatDataForFixedSizeDiskUser() Incorrect FAT type specifier!"));
+ return KErrArgument;
+ };
+
+ //-- check if we can format the volume with requested FAT type
+ const TFatType fatType = SuggestFatType();
+ if(fatType != reqFatType)
+ {//-- volume metrics don't correspond to the requested FAT type
+ __PRINT(_L("CFatFormatCB::InitFormatDataForFixedSizeDiskUser() FAT type mismatch!"));
+ return KErrArgument;
+ }
+
+
+ return KErrNone;
+ }
+
+/**
+ Initialize the format parameters for a custom fixed sized disk
+
+ @param aFormatInfo The custom format parameters
+ @return system-wide error code
+*/
+TInt CFatFormatCB::InitFormatDataForFixedSizeDiskCustom(const TLDFormatInfo& aFormatInfo)
+ {
+ if(aFormatInfo.iFlags & TLDFormatInfo::EOneFatTable)
+ iNumberOfFats = 1;
+ else if(aFormatInfo.iFlags & TLDFormatInfo::ETwoFatTables)
+ iNumberOfFats = 2;
+ else if(Drive().IsRemovable())
+ iNumberOfFats = KNumberOfFatsExternal;
+ else
+ iNumberOfFats = KNumberOfFatsInternal;
+
+ iRootDirEntries=512;
+
+ iSectorsPerCluster = aFormatInfo.iSectorsPerCluster;
+ iSectorsPerTrack = aFormatInfo.iSectorsPerTrack;
+ iNumberOfHeads = aFormatInfo.iNumberOfSides;
+ iReservedSectors = aFormatInfo.iReservedSectors ? aFormatInfo.iReservedSectors : KDefFatResvdSec;
+
+ switch (aFormatInfo.iFATBits)
+ {
+ case TLDFormatInfo::EFB12:
+ iFileSystemName = KFileSystemName12;
+ iSectorsPerFat = MaxFat12Sectors();
+ break;
+
+ case TLDFormatInfo::EFB16:
+ iFileSystemName = KFileSystemName16;
+ iSectorsPerFat = MaxFat16Sectors();
+ break;
+
+ default:
+ {
+ TInt64 clusters64 = (aFormatInfo.iCapacity / KDefaultSectorSize) / iSectorsPerCluster;
+ TInt clusters = I64LOW(clusters64);
+ if (clusters < 4085)
+ {
+ iFileSystemName = KFileSystemName12;
+ iSectorsPerFat = MaxFat12Sectors();
+ }
+ else
+ {
+ iFileSystemName = KFileSystemName16;
+ iSectorsPerFat = MaxFat16Sectors();
+ }
+ }
+ }
+
+ return KErrNone;
+ }
+
+void CFatFormatCB::RecordOldInfoL()
+ {
+ __PRINT(_L("CFatFormatCB::RecordOldInfoL"));
+ // Check if mount or disk is corrupt
+ // This should be stored in member variable because FatMount is remounted
+ // every time RFormat::Next() gets called thus FatMount().Initialised()
+ // will be inconsistent with previous state.
+ TLocalDriveCapsV3Buf caps;
+ User::LeaveIfError(LocalDrive()->Caps(caps));
+ iVariableSize=((caps().iMediaAtt)&KMediaAttVariableSize) ? (TBool)ETrue : (TBool)EFalse;
+ iDiskCorrupt = !FatMount().ConsistentState();
+ iBadClusters.Reset();
+ iBadSectors.Reset();
+ if (!iVariableSize && !iDiskCorrupt && (iMode & EQuickFormat))
+ {
+ iOldFirstFreeSector = FatMount().iFirstFreeByte >> FatMount().SectorSizeLog2();
+ iOldSectorsPerCluster = FatMount().SectorsPerCluster();
+
+ FatMount().FAT().InvalidateCacheL(); //-- invalidate whole FAT cache
+
+ const TInt maxClusterNum = FatMount().iUsableClusters + KFatFirstSearchCluster;
+
+ // Collect bad cluster information from current FAT table
+ const TUint32 mark = FatMount().Is16BitFat() ? KBad_16Bit : KBad_12Bit;
+ for (TInt i=KFatFirstSearchCluster; i<maxClusterNum; i++)
+ if (FatMount().FAT().ReadL(i) == mark)
+ iBadClusters.AppendL(i);
+ }
+ }
+
+/**
+Create the boot sector on media for the volume.
+
+@leave System wide error codes
+*/
+void CFatFormatCB::CreateBootSectorL()
+ {
+ __PRINT1(_L("CFatFormatCB::CreateBootSector() drive:%d"),DriveNumber());
+
+ TFatBootSector bootSector;
+
+ bootSector.SetVendorID(KDefaultVendorID);
+ bootSector.SetBytesPerSector(iBytesPerSector);
+ bootSector.SetSectorsPerCluster(iSectorsPerCluster);
+ bootSector.SetReservedSectors(iReservedSectors);
+ bootSector.SetNumberOfFats(iNumberOfFats);
+ bootSector.SetRootDirEntries(iRootDirEntries);
+ if (iMaxDiskSectors<(TInt)KMaxTUint16)
+ bootSector.SetTotalSectors(iMaxDiskSectors);
+ else
+ {
+ bootSector.SetTotalSectors(0);
+ bootSector.SetHugeSectors(iMaxDiskSectors);
+ }
+ TInt numberOfClusters=iMaxDiskSectors/iSectorsPerCluster;
+ if (numberOfClusters>(TInt)KMaxTUint16)
+ User::Leave(KErrTooBig);
+ bootSector.SetFatSectors(iSectorsPerFat);
+ bootSector.SetReservedByte(0);
+ TTime timeID;
+ timeID.HomeTime(); // System time in future?
+ bootSector.SetUniqueID(I64LOW(timeID.Int64())); // Generate UniqueID from time
+ bootSector.SetVolumeLabel(_L8(""));
+ bootSector.SetFileSysType(iFileSystemName);
+// Floppy specific info:
+ bootSector.SetJumpInstruction();
+ bootSector.SetMediaDescriptor(KBootSectorMediaDescriptor);
+ bootSector.SetNumberOfHeads(iNumberOfHeads);
+ bootSector.SetHiddenSectors(iHiddenSectors);
+ bootSector.SetSectorsPerTrack(iSectorsPerTrack);
+ bootSector.SetPhysicalDriveNumber(128);
+ bootSector.SetExtendedBootSignature(0x29);
+
+
+ User::LeaveIfError(FatMount().DoWriteBootSector(KBootSectorNum*bootSector.BytesPerSector(), bootSector));
+ }
+
+//-------------------------------------------------------------------------------------------------------------------
+
+/**
+Format a disk section, called iteratively to erase whole of media, on last iteration
+creates an empty volume. If called with quick formatonly erases the Fat leaving the
+rest of the volume intact.
+
+@leave System wide error code
+*/
+void CFatFormatCB::DoFormatStepL()
+ {
+ if (iFormatInfo.iFormatIsCurrent==EFalse)
+ {
+ if (iMode & EForceErase)
+ {
+ TInt r = FatMount().ErasePassword();
+ User::LeaveIfError(r);
+ // CFatMountCB::ErasePassword() calls TBusLocalDrive::ForceRemount(),
+ // so need to stop a remount from occurring in next call to :
+ // TFsFormatNext::DoRequestL((), TDrive::CheckMount().
+ FatMount().Drive().SetChanged(EFalse);
+ }
+
+ RecordOldInfoL();
+ InitializeFormatDataL();
+ FatMount().DoDismount();
+ if (iVariableSize)
+ FatMount().ReduceSizeL(0,I64LOW(FatMount().iSize));
+ }
+ //
+ // Blank disk if not EQuickFormat
+ //
+ if (!iVariableSize && !(iMode & EQuickFormat) && iCurrentStep)
+ {
+ if (iFormatInfo.iFormatIsCurrent == EFalse)
+ {//-- firstly invalidate sectors 0-6 inclusive
+ DoZeroFillMediaL(0, 7*iBytesPerSector);
+ }
+
+ TInt ret=FatMount().LocalDrive()->Format(iFormatInfo);
+ if (ret!=KErrNone && ret!=KErrEof) // Handle format error
+ ret = HandleCorrupt(ret);
+ if (ret!=KErrNone && ret!=KErrEof) // KErrEof could be set by LocalDrive()->Format()
+ User::Leave(ret);
+ if (ret==KErrNone)
+ {
+ iCurrentStep=100-(100*iFormatInfo.i512ByteSectorsFormatted)/iMaxDiskSectors;
+ if (iCurrentStep<=0)
+ iCurrentStep=1;
+ return;
+ }
+ }
+
+ // ReMount since MBR may have been rewritten and partition may have moved / changed size
+ TInt ret = LocalDrive()->ForceRemount(0);
+ if (ret != KErrNone && ret != KErrNotSupported)
+ User::Leave(ret);
+
+ // MBR may have changed, so need to re-read iHiddenSectors etc.before BPB is written
+ InitializeFormatDataL();
+
+ // Translate bad sector number to cluster number which contains that sector
+ // This only happens in full format, in quick format they are already cluster numbers
+ if (!iVariableSize && !(iMode & EQuickFormat))
+ User::LeaveIfError(BadSectorToCluster());
+
+ //
+ // Do the rest of the disk in one lump
+ //
+ iCurrentStep=0;
+
+
+ //-- zero-fill media from position 0 to the FAT end, i.e main & backup boot sector, FSInfo and its copy and all FATs
+ const TUint32 posFatEnd = ((iSectorsPerFat*iNumberOfFats) + iReservedSectors) * iBytesPerSector; //-- last FAT end position
+
+ if (iVariableSize)
+ FatMount().EnlargeL(posFatEnd);
+
+ DoZeroFillMediaL(0, posFatEnd);
+
+ //-- Zero fill root directory
+ const TInt rootDirSector = iReservedSectors + (iNumberOfFats * iSectorsPerFat);
+ const TInt rootDirSize = iRootDirEntries * KSizeOfFatDirEntry; //-- size in bytes
+
+ const TUint32 posRootDirStart = rootDirSector * iBytesPerSector;
+ const TUint32 posRootDirEnd = posRootDirStart + rootDirSize;
+
+ const TInt numOfRootSectors=(rootDirSize%iBytesPerSector) ? (rootDirSize/iBytesPerSector+1) : (rootDirSize/iBytesPerSector);
+ if (iVariableSize)
+ FatMount().EnlargeL(iBytesPerSector*numOfRootSectors);
+
+ DoZeroFillMediaL(posRootDirStart, posRootDirEnd);
+
+ // Enlarge ram drive to take into account rounding of
+ // data start to cluster boundary
+ if(iVariableSize && iSectorsPerCluster!=1)
+ {
+ const TInt firstFreeSector=rootDirSector+numOfRootSectors;
+ const TInt firstFreeCluster=firstFreeSector%iSectorsPerCluster ? firstFreeSector/iSectorsPerCluster+1 : firstFreeSector/iSectorsPerCluster;
+ const TInt alignedSector=firstFreeCluster*iSectorsPerCluster;
+ if(alignedSector!=firstFreeSector)
+ FatMount().EnlargeL((alignedSector-firstFreeSector)*iBytesPerSector);
+ }
+
+ //-- FAT[0] must contain media descriptor in the low byte, FAT[1] for fat16/32 may contain some flags
+ TBuf8<4> startFat(4);
+ startFat.Fill(0xFF);
+
+ if(iVariableSize||Is16BitFat()) //-- FAT16 or RAM drive which is always FAT16
+ {
+ startFat.SetLength(4);
+ }
+ else //-- FAT12
+ {
+ startFat.SetLength(3);
+ }
+
+ startFat[0]=KBootSectorMediaDescriptor;
+
+ //-- write FAT[0] and FAT[1] entries to all copies of FAT
+ for(TInt i=0;i<iNumberOfFats;i++)
+ {
+ User::LeaveIfError(LocalDrive()->Write(iBytesPerSector*(iReservedSectors+(iSectorsPerFat*i)),startFat));
+ }
+
+ //-- create boot sectors
+ CreateBootSectorL();
+
+ //-- here we have bad clusters numbers saved by the quick format
+ //-- Interpret old bad cluster number to new cluster number and mark new bad clusters
+ if (!iVariableSize && iBadClusters.Count()>0)
+ {
+ //-- Here we need fully mounted volume, so mount it normally.
+ FatMount().MountL(EFalse);
+
+ iBadClusters.Sort();
+ TranslateL();
+ TInt mark = FatMount().Is16BitFat() ? KBad_16Bit : KBad_12Bit;
+ TInt i;
+
+ for (i=0; i<iBadClusters.Count(); ++i)
+ FatMount().FAT().WriteL(iBadClusters[i], mark);
+
+ FatMount().FAT().FlushL();
+#if defined(_DEBUG)
+ TInt r=FatMount().CheckDisk();
+ __PRINT1(_L("CFatFormatCB::DoFormatStepL() CheckDisk res: %d"),r);
+#endif
+ }
+ else
+ {
+ //-- We do not need to perform full mount in this case, the TDrive object will be marked as changed in ~CFormatCB and the
+ //-- mount will be closed. Therefore on the first access to it it will be mounted normally.
+ FatMount().MountL(ETrue); //-- force mount
+ }
+
+ __PRINT1(_L("CFatFormatCB::DoFormatStepL() Format complete drv:%d"), DriveNumber());
+ }
+
+TInt CFatFormatCB::BadSectorToCluster()
+ {
+ const TInt sizeofFatAndRootDir = iSectorsPerFat*iNumberOfFats + ((iRootDirEntries*KSizeOfFatDirEntry+(1<<iSectorSizeLog2)-1)>>iSectorSizeLog2);
+ TInt firstFreeSector = iReservedSectors + sizeofFatAndRootDir;
+
+ TInt i, r;
+ for (i=0; i<iBadSectors.Count(); ++i)
+ {
+ TInt badSector = iBadSectors[i];
+ // Check in rare case that corrupt in critical area
+ // which includes bootsector, FAT table, (and root dir if not FAT32)
+ if (badSector < firstFreeSector)
+ {
+ if (badSector == 0) // Boot sector corrupt
+ return KErrCorrupt;
+ if (badSector < iReservedSectors) // Harmless in reserved area
+ continue;
+ // Extend reserved area to cover bad sector
+ iReservedSectors = badSector + 1;
+ firstFreeSector = iReservedSectors + sizeofFatAndRootDir;
+ continue;
+ }
+
+ // Figure out bad cluster number and record it
+ TInt cluster = (badSector-firstFreeSector)/iSectorsPerCluster + KFatFirstSearchCluster;
+ if (iBadClusters.Find(cluster) == KErrNotFound)
+ {
+ if ((r=iBadClusters.Append(cluster)) != KErrNone)
+ return r;
+ }
+ }
+ return KErrNone;
+ }
+