+++ /dev/null
-/*
- * COPYRIGHT: See COPYING in the top level directory
- * PROJECT: ReactOS kernel
- * FILE: ntoskrnl/cc/fs.c
- * PURPOSE: Implements cache managers functions useful for File Systems
- *
- * PROGRAMMERS: Alex Ionescu
- */
-
-/* INCLUDES ******************************************************************/
-
-#include <ntoskrnl.h>
-#define NDEBUG
-#include <debug.h>
-
-#ifndef VACB_MAPPING_GRANULARITY
-#define VACB_MAPPING_GRANULARITY (256 * 1024)
-#endif
-
-/* GLOBALS *****************************************************************/
-
-extern KGUARDED_MUTEX ViewLock;
-extern ULONG DirtyPageCount;
-
-NTSTATUS CcRosInternalFreeVacb(PROS_VACB Vacb);
-
-/* FUNCTIONS *****************************************************************/
-
-/*
- * @unimplemented
- */
-LARGE_INTEGER
-NTAPI
-CcGetDirtyPages (
- IN PVOID LogHandle,
- IN PDIRTY_PAGE_ROUTINE DirtyPageRoutine,
- IN PVOID Context1,
- IN PVOID Context2)
-{
- LARGE_INTEGER i;
-
- CCTRACE(CC_API_DEBUG, "LogHandle=%p DirtyPageRoutine=%p Context1=%p Context2=%p\n",
- LogHandle, DirtyPageRoutine, Context1, Context2);
-
- UNIMPLEMENTED;
- i.QuadPart = 0;
- return i;
-}
-
-/*
- * @implemented
- */
-PFILE_OBJECT
-NTAPI
-CcGetFileObjectFromBcb (
- IN PVOID Bcb)
-{
- PINTERNAL_BCB iBcb = (PINTERNAL_BCB)Bcb;
-
- CCTRACE(CC_API_DEBUG, "Bcb=%p\n", Bcb);
-
- return iBcb->Vacb->SharedCacheMap->FileObject;
-}
-
-/*
- * @unimplemented
- */
-LARGE_INTEGER
-NTAPI
-CcGetLsnForFileObject (
- IN PFILE_OBJECT FileObject,
- OUT PLARGE_INTEGER OldestLsn OPTIONAL)
-{
- LARGE_INTEGER i;
-
- CCTRACE(CC_API_DEBUG, "FileObject=%p\n", FileObject);
-
- UNIMPLEMENTED;
- i.QuadPart = 0;
- return i;
-}
-
-/*
- * @unimplemented
- */
-VOID
-NTAPI
-CcInitializeCacheMap (
- IN PFILE_OBJECT FileObject,
- IN PCC_FILE_SIZES FileSizes,
- IN BOOLEAN PinAccess,
- IN PCACHE_MANAGER_CALLBACKS CallBacks,
- IN PVOID LazyWriterContext)
-{
- NTSTATUS Status;
-
- ASSERT(FileObject);
- ASSERT(FileSizes);
-
- CCTRACE(CC_API_DEBUG, "FileObject=%p FileSizes=%p PinAccess=%d CallBacks=%p LazyWriterContext=%p\n",
- FileObject, FileSizes, PinAccess, CallBacks, LazyWriterContext);
-
- /* Call old ROS cache init function */
- Status = CcRosInitializeFileCache(FileObject,
- FileSizes,
- PinAccess,
- CallBacks,
- LazyWriterContext);
- if (!NT_SUCCESS(Status))
- ExRaiseStatus(Status);
-}
-
-/*
- * @unimplemented
- */
-BOOLEAN
-NTAPI
-CcIsThereDirtyData (
- IN PVPB Vpb)
-{
- CCTRACE(CC_API_DEBUG, "Vpb=%p\n", Vpb);
-
- UNIMPLEMENTED;
- return FALSE;
-}
-
-/*
- * @unimplemented
- */
-BOOLEAN
-NTAPI
-CcPurgeCacheSection (
- IN PSECTION_OBJECT_POINTERS SectionObjectPointer,
- IN PLARGE_INTEGER FileOffset OPTIONAL,
- IN ULONG Length,
- IN BOOLEAN UninitializeCacheMaps)
-{
- PROS_SHARED_CACHE_MAP SharedCacheMap;
- LONGLONG StartOffset;
- LONGLONG EndOffset;
- LIST_ENTRY FreeList;
- KIRQL OldIrql;
- PLIST_ENTRY ListEntry;
- PROS_VACB Vacb;
- LONGLONG ViewEnd;
-
- CCTRACE(CC_API_DEBUG, "SectionObjectPointer=%p\n FileOffset=%p Length=%lu UninitializeCacheMaps=%d",
- SectionObjectPointer, FileOffset, Length, UninitializeCacheMaps);
-
- if (UninitializeCacheMaps)
- {
- DPRINT1("FIXME: CcPurgeCacheSection not uninitializing private cache maps\n");
- }
-
- SharedCacheMap = SectionObjectPointer->SharedCacheMap;
- if (!SharedCacheMap)
- return FALSE;
-
- StartOffset = FileOffset != NULL ? FileOffset->QuadPart : 0;
- if (Length == 0 || FileOffset == NULL)
- {
- EndOffset = MAXLONGLONG;
- }
- else
- {
- EndOffset = StartOffset + Length;
- ASSERT(EndOffset > StartOffset);
- }
-
- InitializeListHead(&FreeList);
-
- KeAcquireGuardedMutex(&ViewLock);
- KeAcquireSpinLock(&SharedCacheMap->CacheMapLock, &OldIrql);
- ListEntry = SharedCacheMap->CacheMapVacbListHead.Flink;
- while (ListEntry != &SharedCacheMap->CacheMapVacbListHead)
- {
- Vacb = CONTAINING_RECORD(ListEntry, ROS_VACB, CacheMapVacbListEntry);
- ListEntry = ListEntry->Flink;
-
- /* Skip VACBs outside the range, or only partially in range */
- if (Vacb->FileOffset.QuadPart < StartOffset)
- {
- continue;
- }
- ViewEnd = min(Vacb->FileOffset.QuadPart + VACB_MAPPING_GRANULARITY,
- SharedCacheMap->SectionSize.QuadPart);
- if (ViewEnd >= EndOffset)
- {
- break;
- }
-
- ASSERT((Vacb->ReferenceCount == 0) ||
- (Vacb->ReferenceCount == 1 && Vacb->Dirty));
-
- /* This VACB is in range, so unlink it and mark for free */
- RemoveEntryList(&Vacb->VacbLruListEntry);
- if (Vacb->Dirty)
- {
- RemoveEntryList(&Vacb->DirtyVacbListEntry);
- DirtyPageCount -= VACB_MAPPING_GRANULARITY / PAGE_SIZE;
- }
- RemoveEntryList(&Vacb->CacheMapVacbListEntry);
- InsertHeadList(&FreeList, &Vacb->CacheMapVacbListEntry);
- }
- KeReleaseSpinLock(&SharedCacheMap->CacheMapLock, OldIrql);
- KeReleaseGuardedMutex(&ViewLock);
-
- while (!IsListEmpty(&FreeList))
- {
- Vacb = CONTAINING_RECORD(RemoveHeadList(&FreeList),
- ROS_VACB,
- CacheMapVacbListEntry);
- CcRosInternalFreeVacb(Vacb);
- }
-
- return FALSE;
-}
-
-
-/*
- * @implemented
- */
-VOID NTAPI
-CcSetFileSizes (
- IN PFILE_OBJECT FileObject,
- IN PCC_FILE_SIZES FileSizes)
-{
- KIRQL oldirql;
- PROS_SHARED_CACHE_MAP SharedCacheMap;
-
- CCTRACE(CC_API_DEBUG, "FileObject=%p FileSizes=%p\n",
- FileObject, FileSizes);
-
- DPRINT("CcSetFileSizes(FileObject 0x%p, FileSizes 0x%p)\n",
- FileObject, FileSizes);
- DPRINT("AllocationSize %I64d, FileSize %I64d, ValidDataLength %I64d\n",
- FileSizes->AllocationSize.QuadPart,
- FileSizes->FileSize.QuadPart,
- FileSizes->ValidDataLength.QuadPart);
-
- SharedCacheMap = FileObject->SectionObjectPointer->SharedCacheMap;
-
- /*
- * It is valid to call this function on file objects that weren't
- * initialized for caching. In this case it's simple no-op.
- */
- if (SharedCacheMap == NULL)
- return;
-
- if (FileSizes->AllocationSize.QuadPart < SharedCacheMap->SectionSize.QuadPart)
- {
- CcPurgeCacheSection(FileObject->SectionObjectPointer,
- &FileSizes->AllocationSize,
- 0,
- FALSE);
- }
-
- KeAcquireSpinLock(&SharedCacheMap->CacheMapLock, &oldirql);
- SharedCacheMap->SectionSize = FileSizes->AllocationSize;
- SharedCacheMap->FileSize = FileSizes->FileSize;
- KeReleaseSpinLock(&SharedCacheMap->CacheMapLock, oldirql);
-}
-
-/*
- * @unimplemented
- */
-VOID
-NTAPI
-CcSetLogHandleForFile (
- IN PFILE_OBJECT FileObject,
- IN PVOID LogHandle,
- IN PFLUSH_TO_LSN FlushToLsnRoutine)
-{
- CCTRACE(CC_API_DEBUG, "FileObject=%p LogHandle=%p FlushToLsnRoutine=%p\n",
- FileObject, LogHandle, FlushToLsnRoutine);
-
- UNIMPLEMENTED;
-}
-
-/*
- * @unimplemented
- */
-BOOLEAN
-NTAPI
-CcUninitializeCacheMap (
- IN PFILE_OBJECT FileObject,
- IN PLARGE_INTEGER TruncateSize OPTIONAL,
- IN PCACHE_UNINITIALIZE_EVENT UninitializeCompleteEvent OPTIONAL)
-{
- NTSTATUS Status;
- PROS_SHARED_CACHE_MAP SharedCacheMap;
- KIRQL OldIrql;
-
- CCTRACE(CC_API_DEBUG, "FileObject=%p TruncateSize=%p UninitializeCompleteEvent=%p\n",
- FileObject, TruncateSize, UninitializeCompleteEvent);
-
- if (TruncateSize != NULL &&
- FileObject->SectionObjectPointer != NULL &&
- FileObject->SectionObjectPointer->SharedCacheMap != NULL)
- {
- SharedCacheMap = FileObject->SectionObjectPointer->SharedCacheMap;
- KeAcquireSpinLock(&SharedCacheMap->CacheMapLock, &OldIrql);
- if (SharedCacheMap->FileSize.QuadPart > TruncateSize->QuadPart)
- {
- SharedCacheMap->FileSize = *TruncateSize;
- }
- KeReleaseSpinLock(&SharedCacheMap->CacheMapLock, OldIrql);
- CcPurgeCacheSection(FileObject->SectionObjectPointer,
- TruncateSize,
- 0,
- FALSE);
- }
-
- Status = CcRosReleaseFileCache(FileObject);
- if (UninitializeCompleteEvent)
- {
- KeSetEvent(&UninitializeCompleteEvent->Event, IO_NO_INCREMENT, FALSE);
- }
- return NT_SUCCESS(Status);
-}
-
-BOOLEAN
-NTAPI
-CcGetFileSizes (
- IN PFILE_OBJECT FileObject,
- IN PCC_FILE_SIZES FileSizes)
-{
- PROS_SHARED_CACHE_MAP SharedCacheMap;
-
- SharedCacheMap = FileObject->SectionObjectPointer->SharedCacheMap;
-
- if (!SharedCacheMap)
- return FALSE;
-
- FileSizes->AllocationSize = SharedCacheMap->SectionSize;
- FileSizes->FileSize = FileSizes->ValidDataLength = SharedCacheMap->FileSize;
- return TRUE;
-}
projects / reactos.git / blobdiff