97 lines
3.3 KiB
C++
97 lines
3.3 KiB
C++
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//+---------------------------------------------------------------------------
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//
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// Microsoft Windows
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// Copyright (C) Microsoft Corporation, 1997 - 1998.
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//
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// File: usnvol.hxx
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//
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// Contents: Usn volume info
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//
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// History: 07-May-97 SitaramR Created
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//
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//----------------------------------------------------------------------------
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#pragma once
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#include "scaninfo.hxx"
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//+-------------------------------------------------------------------------
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//
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// Class: CUsnVolume
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//
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// Purpose: Usn volume info
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//
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// History: 07-May-97 SitaramR Created
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//
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//--------------------------------------------------------------------------
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class CUsnVolume : public CDoubleLink
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{
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public:
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CUsnVolume( WCHAR wcDriveLetter, VOLUMEID volumeId );
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~CUsnVolume();
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HANDLE VolumeHandle() { return _hVolume; }
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WCHAR DriveLetter() { return _wcDriveLetter; }
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USN MaxUsnRead() { return _usnMaxRead; }
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ULONG PercentRead();
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void SetMaxUsnRead( USN usn ) { _usnMaxRead = usn; }
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ULONGLONG JournalId() { return _JournalID; }
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VOLUMEID VolumeId() { return _volumeId; }
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FILEID RootFileId() { return _fileIdRoot; }
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inline void SetFsctlPending();
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void ResetFsctlPending() { _fFsctlPending = FALSE; }
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BOOL FFsctlPending() { return _fFsctlPending; }
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LONGLONG const & PendingTime() { return _ftPending; }
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HANDLE GetFsctlEvent() { return _evtFsctl.GetHandle(); }
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void CancelFsctl();
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ULONG WaitFsctl( DWORD msec ) { return _evtFsctl.Wait( msec ); }
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IO_STATUS_BLOCK * IoStatusBlock() { return &_iosb; }
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CScanInfoList & GetUsnScopesList() { return _usnScopesList; }
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BOOL IsOnline() const { return _fOnline; }
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void MarkOffline() { _fOnline = FALSE; }
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void * GetBuffer() { return (void *) _readBuffer; }
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ULONG GetBufferSize() { return sizeof(_readBuffer); }
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private:
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ULONGLONG _JournalID; // USN Journal ID
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LONGLONG _ftPending; // Fsctl went pending at this time
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HANDLE _hVolume; // Volume handle for usn fsctls
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WCHAR _wcDriveLetter; // Drive letter for usn scopes
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USN _usnMaxRead; // Max usn read from usn journal
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VOLUMEID _volumeId; // VolumeId
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FILEID _fileIdRoot; // File id of root of volume
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BOOL _fFsctlPending; // Is there an async fsctl pending ?
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BOOL _fOnline; // Is the volume healthy?
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CEventSem _evtFsctl; // Event signalled by async fsctl
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IO_STATUS_BLOCK _iosb; // Status block for fsctl
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CScanInfoList _usnScopesList; // List of scopes to monitor
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ULONGLONG _readBuffer[2048]; // Output buffer for usn-read fsctl
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};
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typedef class TDoubleList<CUsnVolume> CUsnVolumeList;
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typedef class TFwdListIter<CUsnVolume, CUsnVolumeList> CUsnVolumeIter;
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inline void CUsnVolume::SetFsctlPending()
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{
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GetSystemTimeAsFileTime( (FILETIME *)&_ftPending );
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_fFsctlPending = TRUE;
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}
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