3 * COPYRIGHT: See COPYING in the top level directory
4 * PROJECT: ReactOS kernel
5 * FILE: ntoskrnl/cc/pin.c
6 * PURPOSE: Implements cache managers pinning interface
7 * PROGRAMMER: Hartmut Birr
12 /* INCLUDES ******************************************************************/
14 #include <ddk/ntddk.h>
15 #include <ddk/ntifs.h>
16 #include <internal/mm.h>
17 #include <internal/cc.h>
18 #include <internal/pool.h>
19 #include <internal/io.h>
20 #include <ntos/minmax.h>
23 #include <internal/debug.h>
25 /* GLOBALS *******************************************************************/
27 #define ROUND_DOWN(N, S) ((N) - ((N) % (S)))
29 extern NPAGED_LOOKASIDE_LIST iBcbLookasideList;
31 /* FUNCTIONS *****************************************************************/
34 CcMapData (IN PFILE_OBJECT FileObject,
35 IN PLARGE_INTEGER FileOffset,
44 PCACHE_SEGMENT CacheSeg;
49 DPRINT("CcMapData(FileObject %x, FileOffset %d, Length %d, Wait %d,"
50 " pBcb %x, pBuffer %x)\n", FileObject, (ULONG)FileOffset->QuadPart,
51 Length, Wait, pBcb, pBuffer);
53 ReadOffset = FileOffset->QuadPart;
54 Bcb = ((REACTOS_COMMON_FCB_HEADER*)FileObject->FsContext)->Bcb;
57 DPRINT("AllocationSize %d, FileSize %d\n",
58 (ULONG)Bcb->AllocationSize.QuadPart,
59 (ULONG)Bcb->FileSize.QuadPart);
61 if (ReadOffset % Bcb->CacheSegmentSize + Length > Bcb->CacheSegmentSize)
65 ROffset = ROUND_DOWN (ReadOffset, Bcb->CacheSegmentSize);
66 Status = CcRosRequestCacheSegment(Bcb,
71 if (!NT_SUCCESS(Status))
79 CcRosReleaseCacheSegment(Bcb, CacheSeg, FALSE, FALSE, FALSE);
82 if (!NT_SUCCESS(ReadCacheSegment(CacheSeg)))
84 CcRosReleaseCacheSegment(Bcb, CacheSeg, FALSE, FALSE, FALSE);
88 *pBuffer += ReadOffset % Bcb->CacheSegmentSize;
89 iBcb = ExAllocateFromNPagedLookasideList(&iBcbLookasideList);
92 CcRosReleaseCacheSegment(Bcb, CacheSeg, TRUE, FALSE, FALSE);
95 memset(iBcb, 0, sizeof(INTERNAL_BCB));
96 iBcb->CacheSegment = CacheSeg;
98 iBcb->PFCB.MappedLength = Length;
99 iBcb->PFCB.MappedFileOffset.QuadPart = FileOffset->QuadPart;
105 CcUnpinData (IN PVOID Bcb)
107 PINTERNAL_BCB iBcb = Bcb;
108 CcRosReleaseCacheSegment(iBcb->CacheSegment->Bcb, iBcb->CacheSegment, TRUE,
110 ExFreeToNPagedLookasideList(&iBcbLookasideList, iBcb);
114 CcSetDirtyPinnedData (IN PVOID Bcb,
115 IN PLARGE_INTEGER Lsn)
117 PINTERNAL_BCB iBcb = Bcb;