* FILE: ntoskrnl/cc/pin.c
* PURPOSE: Implements cache managers pinning interface
*
- * PROGRAMMERS:
+ * PROGRAMMERS: ?
+ Pierre Schweitzer (pierre@reactos.org)
*/
/* INCLUDES ******************************************************************/
extern NPAGED_LOOKASIDE_LIST iBcbLookasideList;
+/* Counters:
+ * - Number of calls to CcMapData that could wait
+ * - Number of calls to CcMapData that couldn't wait
+ * - Number of calls to CcPinRead that could wait
+ * - Number of calls to CcPinRead that couldn't wait
+ */
+ULONG CcMapDataWait = 0;
+ULONG CcMapDataNoWait = 0;
+ULONG CcPinReadWait = 0;
+ULONG CcPinReadNoWait = 0;
+
/* FUNCTIONS *****************************************************************/
/*
OUT PVOID *pBcb,
OUT PVOID *pBuffer)
{
- ULONG ReadOffset;
+ LONGLONG ReadOffset;
BOOLEAN Valid;
PROS_SHARED_CACHE_MAP SharedCacheMap;
PROS_VACB Vacb;
NTSTATUS Status;
PINTERNAL_BCB iBcb;
- ULONG ROffset;
+ LONGLONG ROffset;
DPRINT("CcMapData(FileObject 0x%p, FileOffset %I64x, Length %lu, Flags 0x%lx,"
" pBcb 0x%p, pBuffer 0x%p)\n", FileObject, FileOffset->QuadPart,
Length, Flags, pBcb, pBuffer);
- ReadOffset = (ULONG)FileOffset->QuadPart;
+ if (Flags & MAP_WAIT)
+ {
+ ++CcMapDataWait;
+ }
+ else
+ {
+ ++CcMapDataNoWait;
+ }
+
+ ReadOffset = FileOffset->QuadPart;
ASSERT(FileObject);
ASSERT(FileObject->SectionObjectPointer);
if (ReadOffset % VACB_MAPPING_GRANULARITY + Length > VACB_MAPPING_GRANULARITY)
{
+ CCTRACE(CC_API_DEBUG, "FileObject=%p FileOffset=%p Length=%lu Flags=0x%lx -> FALSE\n",
+ FileObject, FileOffset, Length, Flags);
+ ExRaiseStatus(STATUS_INVALID_PARAMETER);
return FALSE;
}
&Vacb);
if (!NT_SUCCESS(Status))
{
+ CCTRACE(CC_API_DEBUG, "FileObject=%p FileOffset=%p Length=%lu Flags=0x%lx -> FALSE\n",
+ FileObject, FileOffset, Length, Flags);
+ ExRaiseStatus(Status);
return FALSE;
}
if (!(Flags & MAP_WAIT))
{
CcRosReleaseVacb(SharedCacheMap, Vacb, FALSE, FALSE, FALSE);
+ CCTRACE(CC_API_DEBUG, "FileObject=%p FileOffset=%p Length=%lu Flags=0x%lx -> FALSE\n",
+ FileObject, FileOffset, Length, Flags);
return FALSE;
}
- if (!NT_SUCCESS(CcReadVirtualAddress(Vacb)))
+ Status = CcReadVirtualAddress(Vacb);
+ if (!NT_SUCCESS(Status))
{
CcRosReleaseVacb(SharedCacheMap, Vacb, FALSE, FALSE, FALSE);
+ CCTRACE(CC_API_DEBUG, "FileObject=%p FileOffset=%p Length=%lu Flags=0x%lx -> FALSE\n",
+ FileObject, FileOffset, Length, Flags);
+ ExRaiseStatus(Status);
return FALSE;
}
}
- *pBuffer = (PVOID)((ULONG_PTR)(*pBuffer) + ReadOffset % VACB_MAPPING_GRANULARITY);
+ *pBuffer = (PUCHAR)*pBuffer + ReadOffset % VACB_MAPPING_GRANULARITY;
iBcb = ExAllocateFromNPagedLookasideList(&iBcbLookasideList);
if (iBcb == NULL)
{
CcRosReleaseVacb(SharedCacheMap, Vacb, TRUE, FALSE, FALSE);
+ CCTRACE(CC_API_DEBUG, "FileObject=%p FileOffset=%p Length=%lu Flags=0x%lx -> FALSE\n",
+ FileObject, FileOffset, Length, Flags);
+ ExRaiseStatus(STATUS_INSUFFICIENT_RESOURCES);
return FALSE;
}
iBcb->PFCB.MappedFileOffset = *FileOffset;
iBcb->Vacb = Vacb;
iBcb->Dirty = FALSE;
+ iBcb->Pinned = FALSE;
iBcb->RefCount = 1;
+ ExInitializeResourceLite(&iBcb->Lock);
*pBcb = (PVOID)iBcb;
+ CCTRACE(CC_API_DEBUG, "FileObject=%p FileOffset=%p Length=%lu Flags=0x%lx -> TRUE Bcb=%p\n",
+ FileObject, FileOffset, Length, Flags, iBcb);
return TRUE;
}
IN ULONG Flags,
OUT PVOID * Bcb)
{
- /* no-op for current implementation. */
+ PINTERNAL_BCB iBcb;
+ PROS_SHARED_CACHE_MAP SharedCacheMap;
+
+ CCTRACE(CC_API_DEBUG, "FileOffset=%p FileOffset=%p Length=%lu Flags=0x%lx\n",
+ FileObject, FileOffset, Length, Flags);
+
+ ASSERT(FileObject);
+ ASSERT(FileObject->SectionObjectPointer);
+ ASSERT(FileObject->SectionObjectPointer->SharedCacheMap);
+
+ SharedCacheMap = FileObject->SectionObjectPointer->SharedCacheMap;
+ ASSERT(SharedCacheMap);
+ ASSERT(SharedCacheMap->PinAccess);
+
+ iBcb = *Bcb;
+ ASSERT(iBcb->Pinned == FALSE);
+
+ iBcb->Pinned = TRUE;
+ iBcb->Vacb->PinCount++;
+
+ if (Flags & PIN_EXCLUSIVE)
+ {
+ ExAcquireResourceExclusiveLite(&iBcb->Lock, TRUE);
+ }
+ else
+ {
+ ExAcquireResourceSharedLite(&iBcb->Lock, TRUE);
+ }
+
return TRUE;
}
OUT PVOID * Bcb,
OUT PVOID * Buffer)
{
- if (CcMapData(FileObject, FileOffset, Length, Flags, Bcb, Buffer))
+ CCTRACE(CC_API_DEBUG, "FileOffset=%p FileOffset=%p Length=%lu Flags=0x%lx\n",
+ FileObject, FileOffset, Length, Flags);
+
+ if (Flags & PIN_WAIT)
{
- if (CcPinMappedData(FileObject, FileOffset, Length, Flags, Bcb))
- return TRUE;
- else
- CcUnpinData(Bcb);
+ ++CcPinReadWait;
+ }
+ else
+ {
+ ++CcPinReadNoWait;
+ }
+
+ /* Map first */
+ if (!CcMapData(FileObject, FileOffset, Length, Flags, Bcb, Buffer))
+ {
+ return FALSE;
}
- return FALSE;
+
+ /* Pin then */
+ if (!CcPinMappedData(FileObject, FileOffset, Length, Flags, Bcb))
+ {
+ CcUnpinData(*Bcb);
+ return FALSE;
+ }
+
+ return TRUE;
}
/*
OUT PVOID * Bcb,
OUT PVOID * Buffer)
{
+ CCTRACE(CC_API_DEBUG, "FileOffset=%p FileOffset=%p Length=%lu Zero=%d Flags=0x%lx\n",
+ FileObject, FileOffset, Length, Zero, Flags);
+
/*
* FIXME: This is function is similar to CcPinRead, but doesn't
* read the data if they're not present. Instead it should just
- * prepare the VACBs and zero them out if Zero == TRUE.
+ * prepare the VACBs and zero them out if Zero != FALSE.
*
* For now calling CcPinRead is better than returning error or
* just having UNIMPLEMENTED here.
IN PLARGE_INTEGER Lsn)
{
PINTERNAL_BCB iBcb = Bcb;
+
+ CCTRACE(CC_API_DEBUG, "Bcb=%p Lsn=%p\n",
+ Bcb, Lsn);
+
iBcb->Dirty = TRUE;
+ if (!iBcb->Vacb->Dirty)
+ {
+ CcRosMarkDirtyVacb(iBcb->Vacb);
+ }
}
CcUnpinData (
IN PVOID Bcb)
{
- PINTERNAL_BCB iBcb = Bcb;
+ CCTRACE(CC_API_DEBUG, "Bcb=%p\n", Bcb);
- CcRosReleaseVacb(iBcb->Vacb->SharedCacheMap,
- iBcb->Vacb,
- TRUE,
- iBcb->Dirty,
- FALSE);
- if (--iBcb->RefCount == 0)
- {
- ExFreeToNPagedLookasideList(&iBcbLookasideList, iBcb);
- }
+ CcUnpinDataForThread(Bcb, (ERESOURCE_THREAD)PsGetCurrentThread());
}
/*
IN PVOID Bcb,
IN ERESOURCE_THREAD ResourceThreadId)
{
- UNIMPLEMENTED;
+ PINTERNAL_BCB iBcb = Bcb;
+
+ CCTRACE(CC_API_DEBUG, "Bcb=%p ResourceThreadId=%lu\n", Bcb, ResourceThreadId);
+
+ if (iBcb->Pinned)
+ {
+ ExReleaseResourceForThreadLite(&iBcb->Lock, ResourceThreadId);
+ iBcb->Pinned = FALSE;
+ iBcb->Vacb->PinCount--;
+ }
+
+ if (--iBcb->RefCount == 0)
+ {
+ CcRosReleaseVacb(iBcb->Vacb->SharedCacheMap,
+ iBcb->Vacb,
+ TRUE,
+ iBcb->Dirty,
+ FALSE);
+
+ ExDeleteResourceLite(&iBcb->Lock);
+ ExFreeToNPagedLookasideList(&iBcbLookasideList, iBcb);
+ }
}
/*
IN PVOID Bcb)
{
PINTERNAL_BCB iBcb = Bcb;
+
+ CCTRACE(CC_API_DEBUG, "Bcb=%p\n", Bcb);
+
iBcb->RefCount++;
}
{
PINTERNAL_BCB iBcb = Bcb;
+ CCTRACE(CC_API_DEBUG, "Bcb=%p WriteThrough=%d\n", Bcb, WriteThrough);
+
IoStatus->Status = STATUS_SUCCESS;
if (--iBcb->RefCount == 0)
{
IoStatus->Information = 0;
if (WriteThrough)
{
- KeWaitForSingleObject(&iBcb->Vacb->Mutex,
- Executive,
- KernelMode,
- FALSE,
- NULL);
if (iBcb->Vacb->Dirty)
{
IoStatus->Status = CcRosFlushVacb(iBcb->Vacb);
{
IoStatus->Status = STATUS_SUCCESS;
}
- KeReleaseMutex(&iBcb->Vacb->Mutex, FALSE);
}
else
{
IoStatus->Status = STATUS_SUCCESS;
}
+ if (iBcb->Pinned)
+ {
+ ExReleaseResourceLite(&iBcb->Lock);
+ iBcb->Pinned = FALSE;
+ iBcb->Vacb->PinCount--;
+ ASSERT(iBcb->Vacb->PinCount == 0);
+ }
+
+ CcRosReleaseVacb(iBcb->Vacb->SharedCacheMap,
+ iBcb->Vacb,
+ TRUE,
+ iBcb->Dirty,
+ FALSE);
+
+ ExDeleteResourceLite(&iBcb->Lock);
ExFreeToNPagedLookasideList(&iBcbLookasideList, iBcb);
}
}
projects / reactos.git / blobdiff