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[NTOS:CC] Acquire file for flush when flushing if necessary

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This commit is contained in:
Jérôme Gardou 2020-12-04 10:18:32 +01:00
parent d9f7459bb1
commit f8aa14ce4e
2 changed files with 24 additions and 0 deletions
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16
ntoskrnl/cc/view.c
View file

@ -172,11 +172,27 @@ CcRosFlushVacb (
SIZE_T FlushSize = min(VACB_MAPPING_GRANULARITY, SIZE_T FlushSize = min(VACB_MAPPING_GRANULARITY,
Vacb->SharedCacheMap->SectionSize.QuadPart - Vacb->FileOffset.QuadPart); Vacb->SharedCacheMap->SectionSize.QuadPart - Vacb->FileOffset.QuadPart);
NTSTATUS Status; NTSTATUS Status;
BOOLEAN HaveLock = FALSE;
CcRosUnmarkDirtyVacb(Vacb, TRUE); CcRosUnmarkDirtyVacb(Vacb, TRUE);
/* Lock for flush, if we are not already the top-level */
if (IoGetTopLevelIrp() != (PIRP)FSRTL_CACHE_TOP_LEVEL_IRP)
{
Status = FsRtlAcquireFileForCcFlushEx(Vacb->SharedCacheMap->FileObject);
if (!NT_SUCCESS(Status))
goto quit;
HaveLock = TRUE;
}
Status = MmFlushVirtualMemory(NULL, &Vacb->BaseAddress, &FlushSize, &Iosb); Status = MmFlushVirtualMemory(NULL, &Vacb->BaseAddress, &FlushSize, &Iosb);
if (HaveLock)
{
FsRtlReleaseFileForCcFlush(Vacb->SharedCacheMap->FileObject);
}
quit:
if (!NT_SUCCESS(Status)) if (!NT_SUCCESS(Status))
CcRosMarkDirtyVacb(Vacb); CcRosMarkDirtyVacb(Vacb);

8
ntoskrnl/include/internal/fsrtl.h
View file

@ -148,3 +148,11 @@ NTSTATUS
NTAPI NTAPI
FsRtlAcquireToCreateMappedSection(_In_ PFILE_OBJECT FileObject, FsRtlAcquireToCreateMappedSection(_In_ PFILE_OBJECT FileObject,
_In_ ULONG SectionPageProtection); _In_ ULONG SectionPageProtection);
VOID
NTAPI
FsRtlReleaseFileForCcFlush(IN PFILE_OBJECT FileObject);
NTSTATUS
NTAPI
FsRtlAcquireFileForCcFlushEx(IN PFILE_OBJECT FileObject);