/*
* FUNCTION: Retrieve the standard file information
*/
static
NTSTATUS
NtfsGetStandardInformation(PNTFS_FCB Fcb,
PDEVICE_OBJECT DeviceObject,
PFILE_STANDARD_INFORMATION StandardInfo,
PULONG BufferLength)
{
UNREFERENCED_PARAMETER(DeviceObject);
DPRINT1("NtfsGetStandardInformation(%p, %p, %p, %p)\n", Fcb, DeviceObject, StandardInfo, BufferLength);
if (*BufferLength < sizeof(FILE_STANDARD_INFORMATION))
return STATUS_BUFFER_OVERFLOW;
/* PRECONDITION */
ASSERT(StandardInfo != NULL);
ASSERT(Fcb != NULL);
RtlZeroMemory(StandardInfo,
sizeof(FILE_STANDARD_INFORMATION));
StandardInfo->AllocationSize = Fcb->RFCB.AllocationSize;
StandardInfo->EndOfFile = Fcb->RFCB.FileSize;
StandardInfo->NumberOfLinks = Fcb->LinkCount;
StandardInfo->DeletePending = FALSE;
StandardInfo->Directory = NtfsFCBIsDirectory(Fcb);
*BufferLength -= sizeof(FILE_STANDARD_INFORMATION);
return STATUS_SUCCESS;
}
VOID
NtfsReleaseFCB(PNTFS_VCB Vcb,
PNTFS_FCB Fcb)
{
KIRQL oldIrql;
DPRINT("releasing FCB at %p: %S, refCount:%d\n",
Fcb,
Fcb->PathName,
Fcb->RefCount);
KeAcquireSpinLock(&Vcb->FcbListLock, &oldIrql);
Fcb->RefCount--;
if (Fcb->RefCount <= 0 && !NtfsFCBIsDirectory(Fcb))
{
RemoveEntryList(&Fcb->FcbListEntry);
KeReleaseSpinLock(&Vcb->FcbListLock, oldIrql);
CcUninitializeCacheMap(Fcb->FileObject, NULL, NULL);
NtfsDestroyFCB(Fcb);
}
else
{
KeReleaseSpinLock(&Vcb->FcbListLock, oldIrql);
}
}
NTSTATUS
NtfsGetFCBForFile(PNTFS_VCB Vcb,
PNTFS_FCB *pParentFCB,
PNTFS_FCB *pFCB,
const PWSTR pFileName)
{
NTSTATUS Status;
WCHAR pathName [MAX_PATH];
WCHAR elementName [MAX_PATH];
PWCHAR currentElement;
PNTFS_FCB FCB;
PNTFS_FCB parentFCB;
DPRINT("NtfsGetFCBForFile(%p, %p, %p, '%S')\n",
Vcb,
pParentFCB,
pFCB,
pFileName);
/* Dummy code */
// FCB = NtfsOpenRootFCB(Vcb);
// *pFCB = FCB;
// *pParentFCB = NULL;
#if 1
/* Trivial case, open of the root directory on volume */
if (pFileName [0] == L'\0' || wcscmp(pFileName, L"\\") == 0)
{
DPRINT("returning root FCB\n");
FCB = NtfsOpenRootFCB(Vcb);
*pFCB = FCB;
*pParentFCB = NULL;
return (FCB != NULL) ? STATUS_SUCCESS : STATUS_OBJECT_PATH_NOT_FOUND;
}
else
{
currentElement = pFileName + 1;
wcscpy (pathName, L"\\");
FCB = NtfsOpenRootFCB (Vcb);
}
parentFCB = NULL;
/* Parse filename and check each path element for existance and access */
while (NtfsGetNextPathElement(currentElement) != 0)
{
/* Skip blank directory levels */
if ((NtfsGetNextPathElement(currentElement) - currentElement) == 0)
{
currentElement++;
continue;
}
DPRINT("Parsing, currentElement:%S\n", currentElement);
DPRINT(" parentFCB:%p FCB:%p\n", parentFCB, FCB);
/* Descend to next directory level */
if (parentFCB)
{
NtfsReleaseFCB(Vcb, parentFCB);
parentFCB = NULL;
}
/* fail if element in FCB is not a directory */
if (!NtfsFCBIsDirectory(FCB))
{
DPRINT("Element in requested path is not a directory\n");
NtfsReleaseFCB(Vcb, FCB);
FCB = 0;
*pParentFCB = NULL;
*pFCB = NULL;
return STATUS_OBJECT_PATH_NOT_FOUND;
}
parentFCB = FCB;
/* Extract next directory level into dirName */
NtfsWSubString(pathName,
pFileName,
NtfsGetNextPathElement(currentElement) - pFileName);
DPRINT(" pathName:%S\n", pathName);
FCB = NtfsGrabFCBFromTable(Vcb, pathName);
if (FCB == NULL)
{
NtfsWSubString(elementName,
currentElement,
NtfsGetNextPathElement(currentElement) - currentElement);
DPRINT(" elementName:%S\n", elementName);
Status = NtfsDirFindFile(Vcb, parentFCB, elementName, &FCB);
if (Status == STATUS_OBJECT_NAME_NOT_FOUND)
{
*pParentFCB = parentFCB;
*pFCB = NULL;
currentElement = NtfsGetNextPathElement(currentElement);
if (*currentElement == L'\0' || NtfsGetNextPathElement(currentElement + 1) == 0)
{
return STATUS_OBJECT_NAME_NOT_FOUND;
}
else
{
return STATUS_OBJECT_PATH_NOT_FOUND;
}
}
else if (!NT_SUCCESS(Status))
{
NtfsReleaseFCB(Vcb, parentFCB);
*pParentFCB = NULL;
*pFCB = NULL;
return Status;
}
}
currentElement = NtfsGetNextPathElement(currentElement);
}
*pParentFCB = parentFCB;
*pFCB = FCB;
#endif
return STATUS_SUCCESS;
}