IRP_MJ_CREATE

Hi
I have question on CreateFile , If I have driver A(Let said have symbolic
name a). sit on top of Driver B(Let said have symbolic name b). What I
understand is the following:
If user mode use createfile (with first driver name b) try to get the
handle for driver B, the IRP_MJ_CREATE will reach Driver A first, and if
Driver A do not pass it to Driver B, then driver B will never receive this
IPR.

If that is the case, How to control bus driver.
Thanks in advance

Michael Cheng


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