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I am talking about a KMDF disk filter here.
I need to call some zwcreatefile and zwreadfile and kewaitfforsingleobject to wait for some event in my EvtIoDeviceControl routine.
Is it safe to do this in my device add callback to achieve my goal?
WDF_OBJECT_ATTRIBUTES_INIT_CONTEXT_TYPE(&objAtttributes, FILTER_DEVICE_CONTEXT); objAtttributes.ExecutionLevel = WdfExecutionLevelPassive; status = WdfDeviceCreate(&DeviceInit, &objAtttributes, &wdfDevice);
If it does the job, is there any overhead or consequences to forcing WdfExecutionLevelPassive?
Should I consider the device stack I am filtering or other filters too? Or I can freely force my callback being called in passive_level. (looks like kind of magic to me)
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