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I want to send requests to current instance in presetinfo callback, that means i want to see the write request in my prewrite callback. According to MSDN: "FltWriteFile causes a write request to be sent to the minifilter driver instances attached below the initiating instance and to the file system. The specified instance and the instances attached above it do not receive the write request.", it seems i need to get upper instance by FltGetUpperInstance and call FltWriteFile with it. Or maybe i should use ZwWriteFile directly, can anyone advise how should i implement it?
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