From: Abel Munoz Alcaraz [abelm@ctv.es]
Sent: Wednesday, January 10, 2001 4:07 PM
To: NT Developers Interest List
Subject: [ntdev] RE: Media Change Notification

Hi Phil,

NTSTATUS
  IoRegisterFsRegistrationChange(
  IN PDRIVER_OBJECT DriverObject,
  IN PDRIVER_FS_NOTIFICATION DriverNotificationRoutine
  );

Good luck,

Abel Munoz
Software Engineer
Trymedia Systems
-----Mensaje original-----
De: bounce-ntdev-3489@lists.osr.com
[mailto:bounce-ntdev-3489@lists.osr.com]En nombre de Phillip Burr
Enviado el: lunes, 08 de enero de 2001 23:05
Para: NT Developers Interest List
Asunto: [ntdev] Media Change Notification


This may be any easy question for some but I'm still quite new to this...

I'm trying to write a filter CD-ROM driver to do some special CD filtering.

I need to maintain some state information about the CD and I need to
invalidate it when the media changes.  I've looked through
\src\storage\class\classpnp\autorun.c and I've come to the conclusion
that the easiest way would probably be use IoRegisterPlugPlayNotification
since autorun very conveniently uses IoReportTargetDeviceChangeAsynchronous
when a media change even occurs.

My problem is with IoRegisterPlugPlayNotification.  For
EventCategoryTargetDeviceChange,
IoRegisterPlugPlayNotification requires that EventCategoryData be filled
with
the File Object (PFILE_OBJECT) of the device for which I want notification.

How do I get the File Object of the device that I'm filtering?

I have found that I can use IoGetDeviceObjectPointer to get the File Object
of
a device that has registered a name.  I know that this is true for CD-Rom
devices (\device\cdromX).  So, going this route, how would I get the name
of the device I'm filtering?

Is there an easier way?

Thanks in advance!

Phil



Phillip Burr
Development Department
PowerQuest Corporation
Phillip.Burr@powerquest.com
(801)437-8317


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