/* 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
+ * - Number of calls to CcPinMappedDataCount
*/
ULONG CcMapDataWait = 0;
ULONG CcMapDataNoWait = 0;
+ULONG CcPinReadWait = 0;
+ULONG CcPinReadNoWait = 0;
+ULONG CcPinMappedDataCount = 0;
/* FUNCTIONS *****************************************************************/
+static
+PINTERNAL_BCB
+NTAPI
+CcpFindBcb(
+ IN PROS_SHARED_CACHE_MAP SharedCacheMap,
+ IN PLARGE_INTEGER FileOffset,
+ IN ULONG Length,
+ IN BOOLEAN Pinned)
+{
+ PINTERNAL_BCB Bcb;
+ BOOLEAN Found = FALSE;
+ PLIST_ENTRY NextEntry;
+
+ for (NextEntry = SharedCacheMap->BcbList.Flink;
+ NextEntry != &SharedCacheMap->BcbList;
+ NextEntry = NextEntry->Flink)
+ {
+ Bcb = CONTAINING_RECORD(NextEntry, INTERNAL_BCB, BcbEntry);
+
+ if (Bcb->PFCB.MappedFileOffset.QuadPart <= FileOffset->QuadPart &&
+ (Bcb->PFCB.MappedFileOffset.QuadPart + Bcb->PFCB.MappedLength) >=
+ (FileOffset->QuadPart + Length))
+ {
+ if ((Pinned && Bcb->PinCount > 0) || (!Pinned && Bcb->PinCount == 0))
+ {
+ Found = TRUE;
+ break;
+ }
+ }
+ }
+
+ return (Found ? Bcb : NULL);
+}
+
+static
+VOID
+CcpDereferenceBcb(
+ IN PROS_SHARED_CACHE_MAP SharedCacheMap,
+ IN PINTERNAL_BCB Bcb)
+{
+ ULONG RefCount;
+ KIRQL OldIrql;
+
+ KeAcquireSpinLock(&SharedCacheMap->BcbSpinLock, &OldIrql);
+ RefCount = --Bcb->RefCount;
+ if (RefCount == 0)
+ {
+ RemoveEntryList(&Bcb->BcbEntry);
+ KeReleaseSpinLock(&SharedCacheMap->BcbSpinLock, OldIrql);
+
+ ASSERT(Bcb->PinCount == 0);
+ /*
+ * Don't mark dirty, if it was dirty,
+ * the VACB was already marked as such
+ * following the call to CcSetDirtyPinnedData
+ */
+ CcRosReleaseVacb(SharedCacheMap,
+ Bcb->Vacb,
+ FALSE,
+ FALSE);
+
+ ExDeleteResourceLite(&Bcb->Lock);
+ ExFreeToNPagedLookasideList(&iBcbLookasideList, Bcb);
+ }
+ else
+ {
+ KeReleaseSpinLock(&SharedCacheMap->BcbSpinLock, OldIrql);
+ }
+}
+
+static
+PVOID
+CcpGetAppropriateBcb(
+ IN PROS_SHARED_CACHE_MAP SharedCacheMap,
+ IN PROS_VACB Vacb,
+ IN PLARGE_INTEGER FileOffset,
+ IN ULONG Length,
+ IN ULONG PinFlags,
+ IN BOOLEAN ToPin)
+{
+ KIRQL OldIrql;
+ BOOLEAN Result;
+ PINTERNAL_BCB iBcb, DupBcb;
+
+ iBcb = ExAllocateFromNPagedLookasideList(&iBcbLookasideList);
+ if (iBcb == NULL)
+ {
+ CcRosReleaseVacb(SharedCacheMap, Vacb, FALSE, FALSE);
+ return NULL;
+ }
+
+ RtlZeroMemory(iBcb, sizeof(*iBcb));
+ iBcb->PFCB.NodeTypeCode = 0x2FD; /* As per KMTests */
+ iBcb->PFCB.NodeByteSize = 0;
+ iBcb->PFCB.MappedLength = Length;
+ iBcb->PFCB.MappedFileOffset = *FileOffset;
+ iBcb->Vacb = Vacb;
+ iBcb->PinCount = 0;
+ iBcb->RefCount = 1;
+ ExInitializeResourceLite(&iBcb->Lock);
+
+ KeAcquireSpinLock(&SharedCacheMap->BcbSpinLock, &OldIrql);
+
+ /* Check if we raced with another BCB creation */
+ DupBcb = CcpFindBcb(SharedCacheMap, FileOffset, Length, ToPin);
+ /* Yes, and we've lost */
+ if (DupBcb != NULL)
+ {
+ /* We will return that BCB */
+ ++DupBcb->RefCount;
+ Result = TRUE;
+ KeReleaseSpinLock(&SharedCacheMap->BcbSpinLock, OldIrql);
+
+ if (ToPin)
+ {
+ if (BooleanFlagOn(PinFlags, PIN_EXCLUSIVE))
+ {
+ Result = ExAcquireResourceExclusiveLite(&iBcb->Lock, BooleanFlagOn(PinFlags, PIN_WAIT));
+ }
+ else
+ {
+ Result = ExAcquireSharedStarveExclusive(&iBcb->Lock, BooleanFlagOn(PinFlags, PIN_WAIT));
+ }
+
+ if (Result)
+ {
+ DupBcb->PinCount++;
+ }
+ else
+ {
+ CcpDereferenceBcb(SharedCacheMap, DupBcb);
+ DupBcb = NULL;
+ }
+ }
+
+ if (DupBcb != NULL)
+ {
+ /* Delete the loser */
+ CcRosReleaseVacb(SharedCacheMap, Vacb, FALSE, FALSE);
+ ExDeleteResourceLite(&iBcb->Lock);
+ ExFreeToNPagedLookasideList(&iBcbLookasideList, iBcb);
+ }
+
+ /* Return the winner - no need to update buffer address, it's
+ * relative to the VACB, which is unchanged.
+ */
+ iBcb = DupBcb;
+ }
+ /* Nope, insert ourselves */
+ else
+ {
+ if (ToPin)
+ {
+ iBcb->PinCount++;
+
+ if (BooleanFlagOn(PinFlags, PIN_EXCLUSIVE))
+ {
+ Result = ExAcquireResourceExclusiveLite(&iBcb->Lock, BooleanFlagOn(PinFlags, PIN_WAIT));
+ }
+ else
+ {
+ Result = ExAcquireSharedStarveExclusive(&iBcb->Lock, BooleanFlagOn(PinFlags, PIN_WAIT));
+ }
+
+ ASSERT(Result);
+ }
+
+ InsertTailList(&SharedCacheMap->BcbList, &iBcb->BcbEntry);
+ KeReleaseSpinLock(&SharedCacheMap->BcbSpinLock, OldIrql);
+ }
+
+ return iBcb;
+}
+
+static
+BOOLEAN
+CcpPinData(
+ IN PROS_SHARED_CACHE_MAP SharedCacheMap,
+ IN PLARGE_INTEGER FileOffset,
+ IN ULONG Length,
+ IN ULONG Flags,
+ OUT PVOID * Bcb,
+ OUT PVOID * Buffer)
+{
+ PINTERNAL_BCB NewBcb;
+ KIRQL OldIrql;
+ ULONG VacbOffset;
+ NTSTATUS Status;
+ _SEH2_VOLATILE BOOLEAN Result;
+
+ VacbOffset = (ULONG)(FileOffset->QuadPart % VACB_MAPPING_GRANULARITY);
+
+ if ((VacbOffset + Length) > VACB_MAPPING_GRANULARITY)
+ {
+ /* Complain loudly, we shoud pin the whole range */
+ DPRINT1("TRUNCATING DATA PIN FROM %lu to %lu!\n", Length, VACB_MAPPING_GRANULARITY - VacbOffset);
+ Length = VACB_MAPPING_GRANULARITY - VacbOffset;
+ }
+
+ KeAcquireSpinLock(&SharedCacheMap->BcbSpinLock, &OldIrql);
+ NewBcb = CcpFindBcb(SharedCacheMap, FileOffset, Length, TRUE);
+
+ if (NewBcb != NULL)
+ {
+ BOOLEAN Result;
+
+ ++NewBcb->RefCount;
+ KeReleaseSpinLock(&SharedCacheMap->BcbSpinLock, OldIrql);
+
+ if (BooleanFlagOn(Flags, PIN_EXCLUSIVE))
+ Result = ExAcquireResourceExclusiveLite(&NewBcb->Lock, BooleanFlagOn(Flags, PIN_WAIT));
+ else
+ Result = ExAcquireSharedStarveExclusive(&NewBcb->Lock, BooleanFlagOn(Flags, PIN_WAIT));
+
+ if (!Result)
+ {
+ CcpDereferenceBcb(SharedCacheMap, NewBcb);
+ return FALSE;
+ }
+
+ NewBcb->PinCount++;
+ }
+ else
+ {
+ LONGLONG ROffset;
+ PROS_VACB Vacb;
+
+ KeReleaseSpinLock(&SharedCacheMap->BcbSpinLock, OldIrql);
+
+ if (BooleanFlagOn(Flags, PIN_IF_BCB))
+ {
+ return FALSE;
+ }
+
+ /* Properly round offset and call internal helper for getting a VACB */
+ ROffset = ROUND_DOWN(FileOffset->QuadPart, VACB_MAPPING_GRANULARITY);
+ Status = CcRosGetVacb(SharedCacheMap, ROffset, &Vacb);
+ if (!NT_SUCCESS(Status))
+ {
+ CCTRACE(CC_API_DEBUG, "FileObject=%p FileOffset=%p Length=%lu Flags=0x%lx -> FALSE\n",
+ SharedCacheMap->FileObject, FileOffset, Length, Flags);
+ ExRaiseStatus(Status);
+ return FALSE;
+ }
+
+ NewBcb = CcpGetAppropriateBcb(SharedCacheMap, Vacb, FileOffset, Length, Flags, TRUE);
+ if (NewBcb == NULL)
+ {
+ CcRosReleaseVacb(SharedCacheMap, Vacb, FALSE, FALSE);
+ return FALSE;
+ }
+ }
+
+ Result = FALSE;
+ _SEH2_TRY
+ {
+ /* Ensure the pages are resident */
+ Result = CcRosEnsureVacbResident(NewBcb->Vacb,
+ BooleanFlagOn(Flags, PIN_WAIT),
+ BooleanFlagOn(Flags, PIN_NO_READ),
+ VacbOffset, Length);
+ }
+ _SEH2_FINALLY
+ {
+ if (!Result)
+ {
+ CCTRACE(CC_API_DEBUG, "FileObject=%p FileOffset=%p Length=%lu Flags=0x%lx -> FALSE\n",
+ SharedCacheMap->FileObject, FileOffset, Length, Flags);
+ CcUnpinData(&NewBcb->PFCB);
+ *Bcb = NULL;
+ *Buffer = NULL;
+ }
+ }
+ _SEH2_END;
+
+ if (Result)
+ {
+ *Bcb = &NewBcb->PFCB;
+ *Buffer = (PVOID)((ULONG_PTR)NewBcb->Vacb->BaseAddress + VacbOffset);
+ }
+
+ return Result;
+}
+
/*
* @implemented
*/
OUT PVOID *pBcb,
OUT PVOID *pBuffer)
{
- LONGLONG ReadOffset;
- BOOLEAN Valid;
- PROS_SHARED_CACHE_MAP SharedCacheMap;
+ KIRQL OldIrql;
+ PINTERNAL_BCB iBcb;
PROS_VACB Vacb;
+ PROS_SHARED_CACHE_MAP SharedCacheMap;
+ ULONG VacbOffset;
NTSTATUS Status;
- PINTERNAL_BCB iBcb;
- LONGLONG ROffset;
+ _SEH2_VOLATILE BOOLEAN Result;
- DPRINT("CcMapData(FileObject 0x%p, FileOffset %I64x, Length %lu, Flags 0x%lx,"
+ CCTRACE(CC_API_DEBUG, "CcMapData(FileObject 0x%p, FileOffset 0x%I64x, Length %lu, Flags 0x%lx,"
" pBcb 0x%p, pBuffer 0x%p)\n", FileObject, FileOffset->QuadPart,
Length, Flags, pBcb, pBuffer);
- if (Flags & MAP_WAIT)
- {
- ++CcMapDataWait;
- }
- else
- {
- ++CcMapDataNoWait;
- }
-
- ReadOffset = FileOffset->QuadPart;
-
ASSERT(FileObject);
ASSERT(FileObject->SectionObjectPointer);
ASSERT(FileObject->SectionObjectPointer->SharedCacheMap);
SharedCacheMap = FileObject->SectionObjectPointer->SharedCacheMap;
ASSERT(SharedCacheMap);
- DPRINT("SectionSize %I64x, FileSize %I64x\n",
- SharedCacheMap->SectionSize.QuadPart,
- SharedCacheMap->FileSize.QuadPart);
-
- if (ReadOffset % VACB_MAPPING_GRANULARITY + Length > VACB_MAPPING_GRANULARITY)
+ if (Flags & MAP_WAIT)
{
- 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;
+ ++CcMapDataWait;
+ }
+ else
+ {
+ ++CcMapDataNoWait;
}
- ROffset = ROUND_DOWN(ReadOffset, VACB_MAPPING_GRANULARITY);
- Status = CcRosRequestVacb(SharedCacheMap,
- ROffset,
- pBuffer,
- &Valid,
- &Vacb);
- if (!NT_SUCCESS(Status))
+ VacbOffset = (ULONG)(FileOffset->QuadPart % VACB_MAPPING_GRANULARITY);
+ /* KMTests seem to show that it is allowed to call accross mapping granularity */
+ if ((VacbOffset + 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);
- return FALSE;
+ DPRINT1("TRUNCATING DATA MAP FROM %lu to %lu!\n", Length, VACB_MAPPING_GRANULARITY - VacbOffset);
+ Length = VACB_MAPPING_GRANULARITY - VacbOffset;
}
- if (!Valid)
+ KeAcquireSpinLock(&SharedCacheMap->BcbSpinLock, &OldIrql);
+ iBcb = CcpFindBcb(SharedCacheMap, FileOffset, Length, FALSE);
+
+ if (iBcb == NULL)
{
- if (!(Flags & MAP_WAIT))
+ KeReleaseSpinLock(&SharedCacheMap->BcbSpinLock, OldIrql);
+
+ /* Call internal helper for getting a VACB */
+ Status = CcRosGetVacb(SharedCacheMap, FileOffset->QuadPart, &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);
- return FALSE;
+ SharedCacheMap->FileObject, FileOffset, Length, Flags);
+ ExRaiseStatus(Status);
}
- Status = CcReadVirtualAddress(Vacb);
- if (!NT_SUCCESS(Status))
+ iBcb = CcpGetAppropriateBcb(SharedCacheMap, Vacb, FileOffset, Length, 0, FALSE);
+ if (iBcb == NULL)
{
- CcRosReleaseVacb(SharedCacheMap, Vacb, FALSE, FALSE, FALSE);
+ CcRosReleaseVacb(SharedCacheMap, Vacb, 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;
+ SharedCacheMap->FileObject, FileOffset, Length, Flags);
+ *pBcb = NULL; // If you ever remove this for compat, make sure to review all callers for using an unititialized value
+ ExRaiseStatus(STATUS_INSUFFICIENT_RESOURCES);
}
}
+ else
+ {
+ ++iBcb->RefCount;
+ KeReleaseSpinLock(&SharedCacheMap->BcbSpinLock, OldIrql);
+ }
- *pBuffer = (PUCHAR)*pBuffer + ReadOffset % VACB_MAPPING_GRANULARITY;
- iBcb = ExAllocateFromNPagedLookasideList(&iBcbLookasideList);
- if (iBcb == NULL)
+ _SEH2_TRY
{
- 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;
+ Result = FALSE;
+ /* Ensure the pages are resident */
+ Result = CcRosEnsureVacbResident(iBcb->Vacb, BooleanFlagOn(Flags, MAP_WAIT),
+ BooleanFlagOn(Flags, MAP_NO_READ), VacbOffset, Length);
+ }
+ _SEH2_FINALLY
+ {
+ if (!Result)
+ {
+ CcpDereferenceBcb(SharedCacheMap, iBcb);
+ *pBcb = NULL;
+ *pBuffer = NULL;
+ }
}
+ _SEH2_END;
- RtlZeroMemory(iBcb, sizeof(*iBcb));
- iBcb->PFCB.NodeTypeCode = 0xDE45; /* Undocumented (CAPTIVE_PUBLIC_BCB_NODETYPECODE) */
- iBcb->PFCB.NodeByteSize = sizeof(PUBLIC_BCB);
- iBcb->PFCB.MappedLength = Length;
- iBcb->PFCB.MappedFileOffset = *FileOffset;
- iBcb->Vacb = Vacb;
- iBcb->Dirty = FALSE;
- iBcb->Pinned = FALSE;
- iBcb->RefCount = 1;
- ExInitializeResourceLite(&iBcb->Lock);
- *pBcb = (PVOID)iBcb;
+ if (Result)
+ {
+ *pBcb = &iBcb->PFCB;
+ *pBuffer = (PVOID)((ULONG_PTR)iBcb->Vacb->BaseAddress + VacbOffset);
+ }
- CCTRACE(CC_API_DEBUG, "FileObject=%p FileOffset=%p Length=%lu Flags=0x%lx -> TRUE Bcb=%p\n",
- FileObject, FileOffset, Length, Flags, iBcb);
- return TRUE;
+ CCTRACE(CC_API_DEBUG, "FileObject=%p FileOffset=%p Length=%lu Flags=0x%lx -> TRUE Bcb=%p, Buffer %p\n",
+ FileObject, FileOffset, Length, Flags, *pBcb, *pBuffer);
+ return Result;
}
/*
IN ULONG Flags,
OUT PVOID * Bcb)
{
+ BOOLEAN Result;
+ PVOID Buffer;
+ PINTERNAL_BCB iBcb;
PROS_SHARED_CACHE_MAP SharedCacheMap;
- CCTRACE(CC_API_DEBUG, "FileOffset=%p FileOffset=%p Length=%lu Flags=0x%lx\n",
+ CCTRACE(CC_API_DEBUG, "FileObject=%p FileOffset=%p Length=%lu Flags=0x%lx\n",
FileObject, FileOffset, Length, Flags);
ASSERT(FileObject);
SharedCacheMap = FileObject->SectionObjectPointer->SharedCacheMap;
ASSERT(SharedCacheMap);
- ASSERT(SharedCacheMap->PinAccess);
+ if (!SharedCacheMap->PinAccess)
+ {
+ DPRINT1("FIXME: Pinning a file with no pin access!\n");
+ return FALSE;
+ }
+
+ iBcb = *Bcb ? CONTAINING_RECORD(*Bcb, INTERNAL_BCB, PFCB) : NULL;
+
+ ++CcPinMappedDataCount;
- /* no-op for current implementation. */
- return TRUE;
+ Result = CcpPinData(SharedCacheMap, FileOffset, Length, Flags, Bcb, &Buffer);
+ if (Result)
+ {
+ CcUnpinData(&iBcb->PFCB);
+ }
+
+ return Result;
}
/*
OUT PVOID * Bcb,
OUT PVOID * Buffer)
{
- 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);
- if (CcMapData(FileObject, FileOffset, Length, Flags, Bcb, Buffer))
- {
- if (CcPinMappedData(FileObject, FileOffset, Length, Flags, Bcb))
- {
- iBcb = *Bcb;
-
- ASSERT(iBcb->Pinned == FALSE);
-
- iBcb->Pinned = TRUE;
- iBcb->Vacb->PinCount++;
- CcRosReleaseVacbLock(iBcb->Vacb);
+ ASSERT(FileObject);
+ ASSERT(FileObject->SectionObjectPointer);
+ ASSERT(FileObject->SectionObjectPointer->SharedCacheMap);
- if (Flags & PIN_EXCLUSIVE)
- {
- ExAcquireResourceExclusiveLite(&iBcb->Lock, TRUE);
- }
- else
- {
- ExAcquireResourceSharedLite(&iBcb->Lock, TRUE);
- }
+ SharedCacheMap = FileObject->SectionObjectPointer->SharedCacheMap;
+ ASSERT(SharedCacheMap);
+ if (!SharedCacheMap->PinAccess)
+ {
+ DPRINT1("FIXME: Pinning a file with no pin access!\n");
+ return FALSE;
+ }
- return TRUE;
- }
- else
- CcUnpinData(*Bcb);
+ if (Flags & PIN_WAIT)
+ {
+ ++CcPinReadWait;
}
- return FALSE;
+ else
+ {
+ ++CcPinReadNoWait;
+ }
+
+ return CcpPinData(SharedCacheMap, FileOffset, Length, Flags, Bcb, Buffer);
}
/*
IN PVOID Bcb,
IN PLARGE_INTEGER Lsn)
{
- PINTERNAL_BCB iBcb = Bcb;
+ PINTERNAL_BCB iBcb = CONTAINING_RECORD(Bcb, INTERNAL_BCB, PFCB);
- CCTRACE(CC_API_DEBUG, "Bcb=%p Lsn=%p\n",
- Bcb, Lsn);
+ CCTRACE(CC_API_DEBUG, "Bcb=%p Lsn=%p\n", Bcb, Lsn);
- iBcb->Dirty = TRUE;
+ /* Tell Mm */
+ MmMakePagesDirty(NULL,
+ Add2Ptr(iBcb->Vacb->BaseAddress, iBcb->PFCB.MappedFileOffset.QuadPart - iBcb->Vacb->FileOffset.QuadPart),
+ iBcb->PFCB.MappedLength);
+
+ if (!iBcb->Vacb->Dirty)
+ {
+ CcRosMarkDirtyVacb(iBcb->Vacb);
+ }
}
IN PVOID Bcb,
IN ERESOURCE_THREAD ResourceThreadId)
{
- PINTERNAL_BCB iBcb = Bcb;
+ PINTERNAL_BCB iBcb = CONTAINING_RECORD(Bcb, INTERNAL_BCB, PFCB);
CCTRACE(CC_API_DEBUG, "Bcb=%p ResourceThreadId=%lu\n", Bcb, ResourceThreadId);
- if (iBcb->Pinned)
+ if (iBcb->PinCount != 0)
{
ExReleaseResourceForThreadLite(&iBcb->Lock, ResourceThreadId);
- iBcb->Pinned = FALSE;
- CcRosAcquireVacbLock(iBcb->Vacb, NULL);
- iBcb->Vacb->PinCount--;
+ iBcb->PinCount--;
}
- if (--iBcb->RefCount == 0)
- {
- CcRosReleaseVacb(iBcb->Vacb->SharedCacheMap,
- iBcb->Vacb,
- TRUE,
- iBcb->Dirty,
- FALSE);
-
- ExDeleteResourceLite(&iBcb->Lock);
- ExFreeToNPagedLookasideList(&iBcbLookasideList, iBcb);
- }
+ CcpDereferenceBcb(iBcb->Vacb->SharedCacheMap, iBcb);
}
/*
CcRepinBcb (
IN PVOID Bcb)
{
- PINTERNAL_BCB iBcb = Bcb;
+ PINTERNAL_BCB iBcb = CONTAINING_RECORD(Bcb, INTERNAL_BCB, PFCB);
CCTRACE(CC_API_DEBUG, "Bcb=%p\n", Bcb);
IN BOOLEAN WriteThrough,
IN PIO_STATUS_BLOCK IoStatus)
{
- PINTERNAL_BCB iBcb = Bcb;
+ PINTERNAL_BCB iBcb = CONTAINING_RECORD(Bcb, INTERNAL_BCB, PFCB);
+ KIRQL OldIrql;
+ PROS_SHARED_CACHE_MAP SharedCacheMap;
CCTRACE(CC_API_DEBUG, "Bcb=%p WriteThrough=%d\n", Bcb, WriteThrough);
+ SharedCacheMap = iBcb->Vacb->SharedCacheMap;
IoStatus->Status = STATUS_SUCCESS;
- if (--iBcb->RefCount == 0)
+
+ if (WriteThrough)
+ {
+ CcFlushCache(iBcb->Vacb->SharedCacheMap->FileObject->SectionObjectPointer,
+ &iBcb->PFCB.MappedFileOffset,
+ iBcb->PFCB.MappedLength,
+ IoStatus);
+ }
+ else
{
+ IoStatus->Status = STATUS_SUCCESS;
IoStatus->Information = 0;
- if (WriteThrough)
- {
- CcRosAcquireVacbLock(iBcb->Vacb, NULL);
- if (iBcb->Vacb->Dirty)
- {
- IoStatus->Status = CcRosFlushVacb(iBcb->Vacb);
- }
- else
- {
- IoStatus->Status = STATUS_SUCCESS;
- }
- CcRosReleaseVacbLock(iBcb->Vacb);
- }
- else
- {
- IoStatus->Status = STATUS_SUCCESS;
- }
+ }
+
+ KeAcquireSpinLock(&SharedCacheMap->BcbSpinLock, &OldIrql);
+ if (--iBcb->RefCount == 0)
+ {
+ RemoveEntryList(&iBcb->BcbEntry);
+ KeReleaseSpinLock(&SharedCacheMap->BcbSpinLock, OldIrql);
- if (iBcb->Pinned)
+ if (iBcb->PinCount != 0)
{
ExReleaseResourceLite(&iBcb->Lock);
- iBcb->Pinned = FALSE;
- CcRosAcquireVacbLock(iBcb->Vacb, NULL);
- iBcb->Vacb->PinCount--;
+ iBcb->PinCount--;
+ ASSERT(iBcb->PinCount == 0);
}
+
+ /*
+ * Don't mark dirty, if it was dirty,
+ * the VACB was already marked as such
+ * following the call to CcSetDirtyPinnedData
+ */
+ CcRosReleaseVacb(iBcb->Vacb->SharedCacheMap,
+ iBcb->Vacb,
+ FALSE,
+ FALSE);
+
ExDeleteResourceLite(&iBcb->Lock);
ExFreeToNPagedLookasideList(&iBcbLookasideList, iBcb);
}
+ else
+ {
+ KeReleaseSpinLock(&SharedCacheMap->BcbSpinLock, OldIrql);
+ }
}
projects / reactos.git / blobdiff