150 lines
4.3 KiB
C++
150 lines
4.3 KiB
C++
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//+---------------------------------------------------------------------------
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//
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// Microsoft Windows
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// Copyright (C) Microsoft Corporation, 1991 - 2000.
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//
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// File: PRCSTOB.CXX
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//
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// Contents: Recoverable Storage Object
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//
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// Classes: PRcovStorageObj
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//
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// History: 04-Feb-1994 SrikantS Created
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//
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//----------------------------------------------------------------------------
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#include <pch.cxx>
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#pragma hdrstop
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#include <prcstob.hxx>
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#include <eventlog.hxx>
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//+---------------------------------------------------------------------------
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//
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// Member: PRcovStorageObj::VerifyConsistency
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//
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// Synopsis: This method checks the consistency of the recoverable storage
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// object by comparing the length of the primary stream with that
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// stored in the header.
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//
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// Normally an inconsistency should never be there but this is for
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// those situations when something happened causing the inconsistency.
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//
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// Effects: If there is an inconsistency, the streams will be emptied out.
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//
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// Arguments: (none)
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//
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// History: 3-22-94 srikants Created
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//
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// Notes:
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//
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//----------------------------------------------------------------------------
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void PRcovStorageObj::VerifyConsistency()
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{
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Win4Assert( !IsOpen( CRcovStorageHdr::idxOne ) );
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Win4Assert( !IsOpen( CRcovStorageHdr::idxTwo ) );
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//
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// Verify the validity of signatures in the header.
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//
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if ( !_hdr.IsValid(_storage.GetStorageVersion()) )
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{
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PStorage & storage = GetStorage();
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Win4Assert( !"Corrupt recoverable object" );
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storage.ReportCorruptComponent( L"RcovStorageObj1" );
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THROW( CException( CI_CORRUPT_DATABASE ) );
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}
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CRcovStorageHdr::DataCopyNum iPrim, iBack;
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iPrim = _hdr.GetPrimary();
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iBack = _hdr.GetBackup();
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//
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// First open the primary stream in a read-only mode and check
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// consistency.
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//
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Open( iPrim, FALSE );
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PMmStream & mmStrmPrim = GetMmStream( iPrim );
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LONGLONG llcbPrimary = _hdr.GetCbToSkip(iPrim) +
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_hdr.GetUserDataSize(iPrim);
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LONGLONG cbPrimaryStream = mmStrmPrim.Size();
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BOOL fIsConsistent = llcbPrimary <= cbPrimaryStream;
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Close( iPrim );
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if ( !fIsConsistent )
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{
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ciDebugOut(( DEB_ERROR,
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"PRcovStorageObj - this=0x%X Primary is not consistent\n",
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this ));
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PStorage & storage = GetStorage();
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// Don't assert as this can happen when you kill cisvc while
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// creating a catalog. Current tests do this.
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//Win4Assert( !"Corrupt recoverable object" );
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ciDebugOut(( DEB_ERROR,
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"llcbPrimary %#I64d, primary size %#I64d\n",
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llcbPrimary,
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cbPrimaryStream ));
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storage.ReportCorruptComponent( L"RcovStorageObj2" );
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THROW( CException( CI_CORRUPT_DATABASE ) );
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}
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//
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// If the recoverable object is clean, the backup is excpected to be
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// consistent also.
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//
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if ( _hdr.IsBackupClean() )
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{
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//
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// Check the consistency of the backup stream also.
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//
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Open( iBack, FALSE );
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PMmStream & mmStrmBack = GetMmStream( iBack );
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LONGLONG llcbBackup = _hdr.GetCbToSkip(iBack) +
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_hdr.GetUserDataSize(iBack);
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LONGLONG cbBackupStream = mmStrmBack.Size();
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fIsConsistent = llcbBackup <= cbBackupStream;
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Close( iBack );
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if ( !fIsConsistent )
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{
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ciDebugOut(( DEB_ERROR,
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"PRcovStorageObj - this=0x%X Backup is not consistent\n",
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this ));
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PStorage & storage = GetStorage();
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Win4Assert( !"Corrupt recoverable object" );
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ciDebugOut(( DEB_ERROR,
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"llcbBackup %#I64d, backup size %#I64d\n",
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llcbBackup,
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cbBackupStream ));
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storage.ReportCorruptComponent( L"RcovStorageObj3" );
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THROW( CException( CI_CORRUPT_DATABASE ) );
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}
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if ( llcbBackup != llcbPrimary )
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{
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ciDebugOut(( DEB_ERROR,
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"PRcovStorageObj - this=0x%X Lengths not equal\n",
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this ));
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}
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}
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} //VerifyConsistency
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