1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/os/kernelhwsrv/userlibandfileserver/fileserver/sfat/inc/sl_scandrv.h Fri Jun 15 03:10:57 2012 +0200
1.3 @@ -0,0 +1,163 @@
1.4 +// Copyright (c) 1998-2009 Nokia Corporation and/or its subsidiary(-ies).
1.5 +// All rights reserved.
1.6 +// This component and the accompanying materials are made available
1.7 +// under the terms of the License "Eclipse Public License v1.0"
1.8 +// which accompanies this distribution, and is available
1.9 +// at the URL "http://www.eclipse.org/legal/epl-v10.html".
1.10 +//
1.11 +// Initial Contributors:
1.12 +// Nokia Corporation - initial contribution.
1.13 +//
1.14 +// Contributors:
1.15 +//
1.16 +// Description:
1.17 +// f32\sfat\inc\sl_scandrv.h
1.18 +//
1.19 +//
1.20 +
1.21 +/**
1.22 + @file
1.23 + @internalTechnology
1.24 +*/
1.25 +
1.26 +//!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
1.27 +//!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
1.28 +//!!
1.29 +//!! WARNING!! DO NOT edit this file !! '\sfat' component is obsolete and is not being used. '\sfat32'replaces it
1.30 +//!!
1.31 +//!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
1.32 +//!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
1.33 +
1.34 +
1.35 +#ifndef SL_SCANDRV_H
1.36 +#define SL_SCANDRV_H
1.37 +
1.38 +//---------------------------------------------------------------------------------------------------------------------------------
1.39 +
1.40 +const TInt KMaxMatchingEntries = 2; ///< Maximum number of matching directory entries scan drive can fix. Any more indicates a fault in the file system
1.41 +const TInt KMaxArrayDepth = 6; ///< Maximum array depth for cluster storage when KMaxScanDepth is reached
1.42 +
1.43 +//---------------------------------------------------------------------------------------------------------------------------------
1.44 +
1.45 +/**
1.46 +Data structure used to store the location of a partial VFat entry
1.47 +*/
1.48 +struct TPartVFatEntry
1.49 + {
1.50 + TEntryPos iEntryPos; ///< The position of the partial VFat entry
1.51 + TFatDirEntry iEntry; ///< The Dos entry The VFat entries belong with
1.52 + };
1.53 +
1.54 +//---------------------------------------------------------------------------------------------------------------------------------
1.55 +
1.56 +/**
1.57 +Data structure used to store the locations of entries with matching
1.58 +start cluster numbers.
1.59 +*/
1.60 +struct TMatchingStartCluster
1.61 + {
1.62 + TEntryPos iEntries[KMaxMatchingEntries]; ///< The positions of the matching entries
1.63 + TInt iCount; ///< Count of matching entries
1.64 + TInt iStartCluster; ///< The matching cluster number found in more than one entry
1.65 + };
1.66 +
1.67 +
1.68 +//---------------------------------------------------------------------------------------------------------------------------------
1.69 +
1.70 +class CCheckFatTable : public CBase
1.71 + {
1.72 +public:
1.73 + static CCheckFatTable* NewL(CFatMountCB* aOwner);
1.74 + CCheckFatTable(CFatMountCB* aOwner);
1.75 + ~CCheckFatTable();
1.76 + void InitializeL();
1.77 + TBool FlushL();
1.78 + TBool GetNextClusterL(TInt& aCluster) const;
1.79 + void WriteFatEntryEofFL(TInt aCluster);
1.80 + TInt ReadL(TInt aFatIndex) const;
1.81 + void WriteL(TInt aFatIndex,TInt aValue);
1.82 +private:
1.83 + void WriteMediaDescriptor();
1.84 + TInt PosInBytes(TInt aFatIndex) const;
1.85 + TInt PosInIndex(TInt aBytePos) const;
1.86 + inline TBool IsEof16Bit(TInt aCluster) const;
1.87 + inline TBool IsEof12Bit(TInt aCluster) const;
1.88 + inline TInt MaxFatIndex() const;
1.89 +protected:
1.90 + TInt iMaxFatIndex;
1.91 + TUint8* iCheckFat;
1.92 + CFatMountCB* iOwner;
1.93 + };
1.94 +
1.95 +
1.96 +//---------------------------------------------------------------------------------------------------------------------------------
1.97 +
1.98 +/**
1.99 +Scan drive class performs scan drive functionality on all types
1.100 +of fat volume.
1.101 +*/
1.102 +class CScanDrive : public CBase
1.103 + {
1.104 +public:
1.105 + enum TDirError{EScanMatchingEntry=1,EScanPartEntry};
1.106 +public:
1.107 + CScanDrive();
1.108 + ~CScanDrive();
1.109 + static CScanDrive* NewL(CFatMountCB* aMount);
1.110 + void ConstructL(CFatMountCB* aMount);
1.111 + TInt StartL();
1.112 + TBool ProblemsDiscovered() const;
1.113 +
1.114 +
1.115 +private:
1.116 +
1.117 +#if defined(DEBUG_SCANDRIVE)
1.118 + void PrintErrors();
1.119 + void CompareFatsL() const;
1.120 +#endif
1.121 +
1.122 + void FixupDirErrorL();
1.123 + void FindSameStartClusterL();
1.124 + TInt FindStartClusterL(TInt aDirCluster);
1.125 + void CheckDirStructureL();
1.126 + void CheckDirL(TInt aCluster);
1.127 + void ProcessEntryL(const TFatDirEntry& aEntry);
1.128 + TInt CheckEntryClusterL(const TFatDirEntry& aEntry, const TEntryPos& aEntryPos);
1.129 + void WriteClusterChainL(TInt aCluster,TInt aSizeInBytes);
1.130 + TBool MoveToVFatEndL(TEntryPos& aPos,TFatDirEntry& aEntry,TInt& aDirLength);
1.131 + TBool IsValidVFatEntry(const TFatDirEntry& aEntry,TInt prevNum)const;
1.132 + TBool IsDosEntry(const TFatDirEntry& aEntry)const;
1.133 + void AddPartialVFatL(const TEntryPos& aStartPos, const TFatDirEntry& aEntry);
1.134 + TBool AddMatchingEntryL(const TEntryPos& aEntryPos);
1.135 + TInt GetReservedidL(const TEntryPos aVFatPos);
1.136 + void WriteNewFatsL();
1.137 + void FixPartEntryL();
1.138 + void FixMatchingEntryL();
1.139 + void MovePastEntriesL(TEntryPos& aEntryPos,TFatDirEntry& aEntry,TInt aToMove,TInt& aDirEntries);
1.140 + void AddToClusterListL(TInt aCluster);
1.141 + inline TBool AlreadyExistsL(TInt aCluster)const;
1.142 + inline TBool IsEndOfRootDir(const TEntryPos& aPos)const;
1.143 + inline TBool IsEofF(TInt aVal)const;
1.144 + inline TBool IsDirError()const;
1.145 + void IndicateErrorsFound();
1.146 +
1.147 +private:
1.148 + CFatMountCB* iMount;
1.149 + CCheckFatTable* iNewFat;
1.150 + TPartVFatEntry iPartEntry;
1.151 + TMatchingStartCluster iMatching;
1.152 + TDirError iDirError;
1.153 + TInt iDirsChecked;
1.154 + TInt iRecursiveDepth;
1.155 + RArray<TInt>* iClusterListArray[KMaxArrayDepth];
1.156 + TInt iListArrayIndex;
1.157 + TBool iFoundProblems; ///< if ETrue after finish, it means that there where some problems FS structure and they were probably fixed;
1.158 + };
1.159 +
1.160 +
1.161 +
1.162 +
1.163 +
1.164 +#endif //SL_SCANDRV_H
1.165 +
1.166 +