calling DeviceIoControl to move file cluster

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C#

PInvoke

hi,

DeviceIoControl(volumehandle, Consts.MoveFile, movefiledataPointer, movefiledataSize, IntPtr.Zero, 0, ref size, IntPtr.Zero)

i've been trying to get it to work... but i always get ERROR_INSUFFICIENT_BUFFER.
msdn[^] says it happens when 'the output buffer is too small to receive any data, the call fails, GetLastError returns ERROR_INSUFFICIENT_BUFFER, and lpBytesReturned is zero.' although in the FSCTL_MOVE_FILE[^] page it is said that lpOutBuffer must be NULL (IntPtr.Zero) and nOutBufferSize set to 0 !?!?!

tried in this order :
- rechecked types in movefiledata struct

    [StructLayout(LayoutKind.Sequential, Pack = 1)]
    struct MoveFileData
    {
        /// <summary>
        /// handle to the file to be moved
        /// </summary>
        public IntPtr File;

        /// <summary>
        /// VCN (cluster number relative to the beginning of a file) of the first cluster to be moved.
        /// </summary>
        public Int64 StartingVcn;

        /// <summary>
        /// LCN (cluster number on a volume) to which the VCN is to be moved.
        /// </summary>
        public Int64 StartingLcn;

        /// <summary>
        /// The count of clusters to be moved.
        /// </summary>
        public UInt32 ClusterCount;
    }
// snippet 
        GCHandle handle = GCHandle.Alloc(movefiledata, GCHandleType.Pinned);
        IntPtr movefiledataPointer = handle.AddrOfPinnedObject();
        uint movefiledataSize = (uint)Marshal.SizeOf(movefiledata);

- re-targeted compilation to x86
- hacked code so as size would increment on error (desperate)
- re-checked value of Consts.MoveFile against WinIoCtl.h
- re-checked types in MoveFileData against WinIoCtl.h
- posted question on codeproject.com ^_-


any idea???
:: update ::
this code is working perfectly !!!!

int _tmain(int argc, _TCHAR* argv[])
{
	LPCWSTR name = L"\\\\.\\e:";
	HANDLE volumehandle = CreateFileW(name, GENERIC_READ, FILE_SHARE_READ | FILE_SHARE_WRITE, NULL, OPEN_EXISTING, FILE_FLAG_RANDOM_ACCESS, NULL);
	HANDLE filehandle = CreateFileW(L"e:\\Temp\\4caf4c2.tmp", FILE_READ_ATTRIBUTES, FILE_SHARE_READ, NULL, OPEN_EXISTING, FILE_FLAG_BACKUP_SEMANTICS | FILE_FLAG_OPEN_REPARSE_POINT | FILE_FLAG_POSIX_SEMANTICS, NULL);


	MOVE_FILE_DATA move_data;
    move_data.FileHandle = filehandle;
    move_data.StartingVcn.QuadPart = 129;
    move_data.StartingLcn.QuadPart = 1167419;

	move_data.ClusterCount = (DWORD) 1;
    DWORD bytes_ret;
    BOOL ret = DeviceIoControl(volumehandle, FSCTL_MOVE_FILE, &move_data, sizeof(move_data), NULL, 0, &bytes_ret, NULL);
	if (ret == 0)
	{
		DWORD lasterr = GetLastError();
		std::printf("error hapened %u" , lasterr);

		if (lasterr == ERROR_HANDLE_EOF)
			return lasterr;
	}
	CloseHandle(filehandle);
	CloseHandle(volumehandle);

	return 0;
}