请教利用过滤驱动实现将缓存写入磁盘的方法

The CcFlushCache routine flushes all or a portion of a cached file to disk.

VOID
  CcFlushCache(
    IN PSECTION_OBJECT_POINTERS  SectionObjectPointer,
    IN PLARGE_INTEGER  FileOffset  OPTIONAL,
    IN ULONG  Length,
    OUT PIO_STATUS_BLOCK  IoStatus  OPTIONAL
    );


在HelloDDKDeviceIOControl中实现CcFlushCache 函数调用
DriverObject->MajorFunction[IRP_MJ_DEVICE_CONTROL] = HelloDDKDeviceIOControl;

外面通过deviceiocontrol调用执行，大家认为可行吗？

还有我怎么打开我的过滤驱动设备，我安装了微软的过滤驱动，为什么以下调用返回错误代码2
HANDLE hDevice =
        CreateFile(_T("\\\\.\\Sfilter"),
        GENERIC_READ | GENERIC_WRITE,
        0,        // share mode none
        NULL,    // no security
        OPEN_EXISTING,
        FILE_ATTRIBUTE_NORMAL,
        NULL );        // no template

If I understand your question correct, I think you mis-understand the meaning of CcFlushCache(). This function is provided by CM to flush a particular file cache. It's not used to flush all system cache data. The SectionObject is a kernel structure which is not exposed to user mode. I don't think you can easily call CcFlushCache from IoControl.

As I remember, you need to make some changes, in MJ_CREATE I think, in SFilter before you can create an instance of it in user mode. There should be discussions in this forum before talking about it. Just search them.