How to get Parent Object in kernel

NTDEV
1

Hi All,

I create a lower filter driver for SCSI storage devices. How can I get their
parent objects - SCSI ports from my filter driver?

Thanks,
JT

2

Short answer: you don’t. You can ask for the scsi address of the device and
you can use the port part of that address to find the named device for the
parent, but that is pretty much an unsupported feature of the current
implementation. Why do you think you need to communicate with the parent bus
driver?

=====================
Mark Roddy

-----Original Message-----
From: JT Zhou [mailto:xxxxx@emc.com]
Sent: Monday, October 25, 2004 9:50 AM
To: Windows System Software Devs Interest List
Subject: [ntdev] How to get Parent Object in kernel

Hi All,

I create a lower filter driver for SCSI storage devices. How can I get their
parent objects - SCSI ports from my filter driver?

Thanks,
JT

Questions? First check the Kernel Driver FAQ at
http://www.osronline.com/article.cfm?id=256

You are currently subscribed to ntdev as: xxxxx@stratus.com To
unsubscribe send a blank email to xxxxx@lists.osr.com

3

That’s what I am doing now. I find sometimes it may fail to open the named
device after restarting the port for unknown reason - possible because it’s
unsupported feature.

Thanks,
JT

“Roddy, Mark” wrote in message news:xxxxx@ntdev…
> Short answer: you don’t. You can ask for the scsi address of the device
and
> you can use the port part of that address to find the named device for the
> parent, but that is pretty much an unsupported feature of the current
> implementation. Why do you think you need to communicate with the parent
bus
> driver?
>
>
>
> =====================
> Mark Roddy
>
> -----Original Message-----
> From: JT Zhou [mailto:xxxxx@emc.com]
> Sent: Monday, October 25, 2004 9:50 AM
> To: Windows System Software Devs Interest List
> Subject: [ntdev] How to get Parent Object in kernel
>
> Hi All,
>
> I create a lower filter driver for SCSI storage devices. How can I get
their
> parent objects - SCSI ports from my filter driver?
>
> Thanks,
> JT
>
>
>
> —
> Questions? First check the Kernel Driver FAQ at
> http://www.osronline.com/article.cfm?id=256
>
> You are currently subscribed to ntdev as: xxxxx@stratus.com To
> unsubscribe send a blank email to xxxxx@lists.osr.com
>
>