PNP Manager

NTDEV
1

Hello,

I think I have written about this problem before, may
be I was not able to explain it clearly.
Well I am struck with this issue for some time now and
would appreciate any help.

I have one configured logical disk through some
utility at the boot time.
I have one filter driver which attaches itself as a
Lower Filter driver to the disk.
Windows 2000 sends me the PDO of the logical Disk and
I create Fido of it, but at the same time when
DISK.sys sends me the SRB_FUNCTION_CLAIM_DEVICE, I
fail the claim.
Now when I get IRP_MN_START_DEVICE, I create another
DeviceObject ( a virtual Device Object) and call
IoInvalidateDeviceRelations().
Now I get IRP_MN_DEVICE_RELATIONS, here in the
type==BUSRELATIONS, I put the count=1 and give the
adress of the virtual deviceObject and do all other
required things.
After returning it successful, I was expecting the PNP
Manager to send IRP_MN_QUERY_CAPABILITIES and
IRP_MN_QUERY_ID, etc for the virtual device Object
before sending me the IRP_MN_START_DEVICE.
But PNP Manager sends me directly IRP_MN_START_DEVICE
for the virtual device object and I try to register
the interface by calling
IoRegisterDeviceInterface()but it fails returning
0xc0000010(Invalid PDO pointer).

Thanks in Advance,
Regards,
Gurpreet

PS: My idea is that I intent to run Ios through the
virtual DeviceObject.

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2

> -----Original Message-----

From: xxxxx@lists.osr.com
[mailto:xxxxx@lists.osr.com]On Behalf Of Gurpreet Anand
Sent: Friday, September 28, 2001 1:48 PM
To: NT Developers Interest List
Subject: [ntdev] PNP Manager

Hello,

I think I have written about this problem before, may
be I was not able to explain it clearly.
Well I am struck with this issue for some time now and
would appreciate any help.

I have one configured logical disk through some
utility at the boot time.
I have one filter driver which attaches itself as a
Lower Filter driver to the disk.
Windows 2000 sends me the PDO of the logical Disk and
I create Fido of it, but at the same time when
DISK.sys sends me the SRB_FUNCTION_CLAIM_DEVICE, I
fail the claim.

Failing this claim which is coming from the AddDevice routine of disk.sys
causes the system
to tear down the device stack. I don’t think you want to do this. I am
surprised your getting a IRP_MN_START_DEVICE at all.

Now when I get IRP_MN_START_DEVICE, I create another
DeviceObject ( a virtual Device Object) and call
IoInvalidateDeviceRelations().
Now I get IRP_MN_DEVICE_RELATIONS, here in the
type==BUSRELATIONS, I put the count=1 and give the
adress of the virtual deviceObject and do all other
required things.
After returning it successful, I was expecting the PNP
Manager to send IRP_MN_QUERY_CAPABILITIES and
IRP_MN_QUERY_ID, etc for the virtual device Object
before sending me the IRP_MN_START_DEVICE.
But PNP Manager sends me directly IRP_MN_START_DEVICE
for the virtual device object and I try to register
the interface by calling
IoRegisterDeviceInterface()but it fails returning
0xc0000010(Invalid PDO pointer).

Thanks in Advance,
Regards,
Gurpreet

PS: My idea is that I intent to run Ios through the
virtual DeviceObject.

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