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sys: FspFileNodeFlushAndPurgeCache

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This commit is contained in:
Bill Zissimopoulos
2016-03-17 10:13:52 -07:00
parent df85107c42
commit b734e6968d
6 changed files with 157 additions and 22 deletions
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25
src/sys/write.c
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@ -335,28 +335,15 @@ NTSTATUS FspFsvolWritePrepare(
/* if this is a non-cached transfer on a cached file then flush and purge the file */
if (!PagingIo && 0 != FileObject->SectionObjectPointer->DataSectionObject)
{
LARGE_INTEGER FlushOffset = IrpSp->Parameters.Write.ByteOffset;
PLARGE_INTEGER PFlushOffset = &FlushOffset;
ULONG FlushLength = IrpSp->Parameters.Write.Length;
FSP_FSCTL_FILE_INFO FileInfo;
IO_STATUS_BLOCK IoStatus = { 0 };
if (FILE_WRITE_TO_END_OF_FILE == FlushOffset.LowPart && -1L == FlushOffset.HighPart)
{
if (FspFileNodeTryGetFileInfo(FileNode, &FileInfo))
FlushOffset.QuadPart = FileInfo.FileSize;
else
PFlushOffset = 0; /* we don't know how big the file is, so flush it all! */
}
CcFlushCache(FileObject->SectionObjectPointer, PFlushOffset, FlushLength, &IoStatus);
if (!NT_SUCCESS(IoStatus.Status))
Result = FspFileNodeFlushAndPurgeCache(FileNode,
IrpSp->Parameters.Write.ByteOffset.QuadPart,
IrpSp->Parameters.Write.Length,
TRUE);
if (!NT_SUCCESS(Result))
{
FspFileNodeRelease(FileNode, Full);
return IoStatus.Status;
return Result;
}
CcPurgeCacheSection(FileObject->SectionObjectPointer, PFlushOffset, FlushLength, FALSE);
}
/* create a "safe" MDL if necessary */