[hpoussin] 17319: Input parameter in FSCTL_GET_RETRIEVAL_POINTERS is really a STARTING_VCN_INPUT_BUFFER structure (even if it contains only a LARGE_INTEGER)

Input parameter in FSCTL_GET_RETRIEVAL_POINTERS is really a
STARTING_VCN_INPUT_BUFFER structure (even if it contains only a
LARGE_INTEGER)
Modified: trunk/reactos/drivers/fs/vfat/fsctl.c
  _____

Modified: trunk/reactos/drivers/fs/vfat/fsctl.c
--- trunk/reactos/drivers/fs/vfat/fsctl.c	2005-08-11 21:25:28 UTC
(rev 17318)
+++ trunk/reactos/drivers/fs/vfat/fsctl.c	2005-08-11 21:29:37 UTC
(rev 17319)
@@ -704,7 +704,7 @@

DeviceExt = IrpContext->DeviceExt;
    FileObject = IrpContext->FileObject;
    Stack = IrpContext->Stack;
-   if (Stack->Parameters.DeviceIoControl.InputBufferLength <
sizeof(LARGE_INTEGER) ||
+   if (Stack->Parameters.DeviceIoControl.InputBufferLength <
sizeof(STARTING_VCN_INPUT_BUFFER) ||
        Stack->Parameters.DeviceIoControl.Type3InputBuffer == NULL)
    {
       return STATUS_INVALID_PARAMETER;
@@ -719,7 +719,7 @@

ExAcquireResourceSharedLite(&Fcb->MainResource, TRUE);

-   Vcn =
*(PLARGE_INTEGER)Stack->Parameters.DeviceIoControl.Type3InputBuffer;
+   Vcn =
((PSTARTING_VCN_INPUT_BUFFER)Stack->Parameters.DeviceIoControl.Type3Inpu
tBuffer)->StartingVcn;
    RetrievalPointers = IrpContext->Irp->UserBuffer;

MaxExtentCount =
((Stack->Parameters.DeviceIoControl.OutputBufferLength -
sizeof(RetrievalPointers->ExtentCount) -
sizeof(RetrievalPointers->StartingVcn)) /
sizeof(RetrievalPointers->Extents[0]));