We register mini file system filter driver with fltmgr i.e filter manager in windows,and we register IRP for callbacks (preoperation and postoperation callbacks) in that.
As if we know its up-to us to for which IRP we want callback from filter manager.
So my question is how I can find out the any third party filter driver handling which IRP and which IRP its not handling?
If a third party filter registers for an IRP it can do nothing just pass-thru the IRP, So cannot know it does something with IRP. Again Filter driver should not have dependency on a third party filter driver.
But can check tools like IRP tracker and fltmc