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Experimental fix for github issue #45

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This commit is contained in:
Bill Zissimopoulos
2017-02-10 12:39:53 -08:00
parent 46d5c98926
commit ccd4bb869c
4 changed files with 67 additions and 1 deletions
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44
src/sys/file.c
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@ -1243,6 +1243,50 @@ NTSTATUS FspFileNodeRenameCheck(PDEVICE_OBJECT FsvolDeviceObject, PIRP OplockIrp
}
}
/* flush and purge cleaned up but still open files affected by rename (github issue #45) */
{
PIRP TopLevelIrp;
IO_STATUS_BLOCK IoStatus;
/* reset the top-level IRP to avoid deadlock on the FileNodes' resources */
TopLevelIrp = IoGetTopLevelIrp();
IoSetTopLevelIrp(0);
/* enumerate in reverse order so that files are flushed before containing directories */
for (
DescendantFileNodeIndex = DescendantFileNodeCount - 1;
DescendantFileNodeCount > DescendantFileNodeIndex;
DescendantFileNodeIndex--)
{
DescendantFileNode = DescendantFileNodes[DescendantFileNodeIndex];
HasHandles = (UINT_PTR)DescendantFileNode & 1;
DescendantFileNode = (PVOID)((UINT_PTR)DescendantFileNode & ~7);
if (HasHandles)
continue;
if (CheckingOldName &&
(DescendantFileNode->FileName.Length <= FileName->Length ||
L'\\' != DescendantFileNode->FileName.Buffer[FileName->Length / sizeof(WCHAR)]))
continue;
if (MmDoesFileHaveUserWritableReferences(&DescendantFileNode->NonPaged->SectionObjectPointers))
continue;
/*
* There are no handles and no writable user mappings. [Ideally we would want to know
* that there are no handles and no user mappings, period. Is there an DDI/method to
* do that?] There may be a read-only user mapping, but in this case CcFlushCache
* should be a no-op and MmForceSectionClosed will fail (which is fine).
*/
ASSERT(DescendantFileNode != FileNode && DescendantFileNode->MainFileNode != FileNode);
FspCcFlushCache(&DescendantFileNode->NonPaged->SectionObjectPointers, 0, 0, &IoStatus);
MmForceSectionClosed(&DescendantFileNode->NonPaged->SectionObjectPointers, FALSE);
}
IoSetTopLevelIrp(TopLevelIrp);
}
/* break any Batch or Handle oplocks on descendants */
Result = STATUS_SUCCESS;
for (