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01d5ad9279
CcSetDirtyPinedData. There is no working shutdown function for writing back each modified cache segment. A reboot or crash can damage the disk. - Added CcRosReferenceCache and CcRosDereferenceCache. - Check at each call to CcRosInitializeFileCache if the cache was initialized for the file stream by a previous call to this function. - Check at each call to CcRosReleaseFileCache if this is possible to delete the caching for the file stream. svn path=/trunk/; revision=3338
89 lines
2.4 KiB
C
89 lines
2.4 KiB
C
#ifndef __INCLUDE_INTERNAL_CC_H
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#define __INCLUDE_INTERNAL_CC_H
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/* $Id: cc.h,v 1.14 2002/08/17 15:14:26 hbirr Exp $ */
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#include <ddk/ntifs.h>
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typedef struct _BCB
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{
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LIST_ENTRY BcbSegmentListHead;
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PFILE_OBJECT FileObject;
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ULONG CacheSegmentSize;
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LARGE_INTEGER AllocationSize;
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LARGE_INTEGER FileSize;
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KSPIN_LOCK BcbLock;
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ULONG RefCount;
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} BCB;
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typedef struct _CACHE_SEGMENT
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{
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/* Base address of the region where the cache segment data is mapped. */
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PVOID BaseAddress;
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/*
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* Memory area representing the region where the cache segment data is
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* mapped.
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*/
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struct _MEMORY_AREA* MemoryArea;
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/* Are the contents of the cache segment data valid. */
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BOOLEAN Valid;
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/* Are the contents of the cache segment data newer than those on disk. */
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BOOLEAN Dirty;
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ULONG MappedCount;
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/* Entry in the list of segments for this BCB. */
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LIST_ENTRY BcbSegmentListEntry;
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/* Entry in the list of segments which are dirty. */
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LIST_ENTRY DirtySegmentListEntry;
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/* Entry in the list of segments. */
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LIST_ENTRY CacheSegmentListEntry;
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LIST_ENTRY CacheSegmentLRUListEntry;
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/* Offset in the file which this cache segment maps. */
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ULONG FileOffset;
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/* Lock. */
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FAST_MUTEX Lock;
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/* Number of references. */
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ULONG ReferenceCount;
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/* Pointer to the BCB for the file which this cache segment maps data for. */
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PBCB Bcb;
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/* Pointer to the next cache segment in a chain. */
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struct _CACHE_SEGMENT* NextInChain;
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} CACHE_SEGMENT;
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VOID STDCALL
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CcMdlReadCompleteDev (IN PMDL MdlChain,
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IN PDEVICE_OBJECT DeviceObject);
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NTSTATUS
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CcRosGetCacheSegment(PBCB Bcb,
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ULONG FileOffset,
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PULONG BaseOffset,
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PVOID* BaseAddress,
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PBOOLEAN UptoDate,
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PCACHE_SEGMENT* CacheSeg);
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VOID
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CcInitView(VOID);
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NTSTATUS STDCALL CcRosFreeCacheSegment(PBCB, PCACHE_SEGMENT);
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NTSTATUS ReadCacheSegment(PCACHE_SEGMENT CacheSeg);
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NTSTATUS WriteCacheSegment(PCACHE_SEGMENT CacheSeg);
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VOID CcInit(VOID);
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NTSTATUS
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CcRosUnmapCacheSegment(PBCB Bcb, ULONG FileOffset, BOOLEAN NowDirty);
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NTSTATUS
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CcRosSuggestFreeCacheSegment(PBCB Bcb, ULONG FileOffset, BOOLEAN NowDirty);
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NTSTATUS
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CcRosGetCacheSegmentChain(PBCB Bcb,
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ULONG FileOffset,
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ULONG Length,
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PCACHE_SEGMENT* CacheSeg);
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VOID CcInitCacheZeroPage(VOID);
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NTSTATUS
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CcRosMarkDirtyCacheSegment(PBCB Bcb, ULONG FileOffset);
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NTSTATUS
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CcRosFlushDirtyPages(ULONG Target, PULONG Count);
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VOID CcRosDereferenceCache(PFILE_OBJECT FileObject);
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VOID CcRosReferenceCache(PFILE_OBJECT FileObject);
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#endif
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