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OSR_Community_User
Member Posts: 110,217
in NTDEV
Hi all,
I have developed a filter driver which layers itself between the SCSI
port driver and the Disk/class driver for NT4.0. The driver loads
properly, but it does not receive any IRPs other than the ones with the
IOCTL_SCSI_GET_INQUIRY_DATA, IOCTL_SCSI_GET_CAPABILITIES and
IOCTL_SCSI_RESCAN_BUS and the CREATE and CLOSE calls. I need help to
figure out why this happens. Is there any documentation about filter
drivers which layer between the SCSI class driver and the port driver ?
Thanks in advance,
Unni
I have developed a filter driver which layers itself between the SCSI
port driver and the Disk/class driver for NT4.0. The driver loads
properly, but it does not receive any IRPs other than the ones with the
IOCTL_SCSI_GET_INQUIRY_DATA, IOCTL_SCSI_GET_CAPABILITIES and
IOCTL_SCSI_RESCAN_BUS and the CREATE and CLOSE calls. I need help to
figure out why this happens. Is there any documentation about filter
drivers which layer between the SCSI class driver and the port driver ?
Thanks in advance,
Unni
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Comments
They don't use the disk/class/port driver mechanisms at all. Your filter
won't work with those devices. Most notably, fibre channel drivers. There
are a few companies with miniports for their cards, but most are now
monolithic for performance reasons (there's a 10-15% penalty for using a
miniport).
See appendix A, part 2 (Designing SCSI Filter drivers) of the kernel mode
drivers design guide for pretty complete information re: scsi filter drivers
and how to implement them.
> -----Original Message-----
> From: [email protected]
> [mailto:[email protected]]On Behalf Of Unnikrishnan P K
> Sent: Wednesday, March 22, 2000 9:12 AM
> To: NT Developers Interest List
> Subject: [ntdev] Scsi Port Filter driver
>
>
> Hi all,
> I have developed a filter driver which layers itself between the SCSI
> port driver and the Disk/class driver for NT4.0. The driver loads
> properly, but it does not receive any IRPs other than the ones with the
> IOCTL_SCSI_GET_INQUIRY_DATA, IOCTL_SCSI_GET_CAPABILITIES and
> IOCTL_SCSI_RESCAN_BUS and the CREATE and CLOSE calls. I need help to
> figure out why this happens. Is there any documentation about filter
> drivers which layer between the SCSI class driver and the port driver ?
>
> Thanks in advance,
> Unni
>
>
>
> ---
> You are currently subscribed to ntdev as: [email protected]
> To unsubscribe send a blank email to $subst('Email.Unsub')
>
working and capturing requests correctly.
--Mark
Mark J. Cariddi
Consulting Associate
[email protected]
OSR Open Systems Resources, Inc.
105 Route 101A, Suite 19
Amherst, New Hampshire 03031
603/595-6500
603/595-6503 Fax
http://www.osr.com
****************************************
The definitive book on writing Windows NT
device drivers, "Windows NT Device Driver
Development" by OSR consulting partners
Peter Viscarola and Tony Mason, is now
available for ordering.
****************************************
-----Original Message-----
From: Unnikrishnan P K [mailto:[email protected]]
Sent: Wednesday, March 22, 2000 10:12 AM
To: NT Developers Interest List
Subject: [ntdev] Scsi Port Filter driver
Hi all,
I have developed a filter driver which layers itself between the SCSI
port driver and the Disk/class driver for NT4.0. The driver loads
properly, but it does not receive any IRPs other than the ones with the
IOCTL_SCSI_GET_INQUIRY_DATA, IOCTL_SCSI_GET_CAPABILITIES and
IOCTL_SCSI_RESCAN_BUS and the CREATE and CLOSE calls. I need help to
figure out why this happens. Is there any documentation about filter
drivers which layer between the SCSI class driver and the port driver ?
Thanks in advance,
Unni
---
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I have not been able to receive the IRP_MJ_SCSI commands in my filter
driver. But the OSR book mentions about filter driver being able to receive
all commands. Is there any flag setting required ?
Thanks in advance,
Unni
Mark Cariddi wrote:
> Are you handling IRP_MJ_SCSI commands? I have a SCSI filter and it is
> working and capturing requests correctly.
>
> --Mark
>
> Mark J. Cariddi
> Consulting Associate
> [email protected]
>
> OSR Open Systems Resources, Inc.
> 105 Route 101A, Suite 19
> Amherst, New Hampshire 03031
> 603/595-6500
> 603/595-6503 Fax
> http://www.osr.com
>
> ****************************************
> The definitive book on writing Windows NT
> device drivers, "Windows NT Device Driver
> Development" by OSR consulting partners
> Peter Viscarola and Tony Mason, is now
> available for ordering.
> ****************************************
>
> -----Original Message-----
> From: Unnikrishnan P K [mailto:[email protected]]
> Sent: Wednesday, March 22, 2000 10:12 AM
> To: NT Developers Interest List
> Subject: [ntdev] Scsi Port Filter driver
>
> Hi all,
> I have developed a filter driver which layers itself between the SCSI
> port driver and the Disk/class driver for NT4.0. The driver loads
> properly, but it does not receive any IRPs other than the ones with the
> IOCTL_SCSI_GET_INQUIRY_DATA, IOCTL_SCSI_GET_CAPABILITIES and
> IOCTL_SCSI_RESCAN_BUS and the CREATE and CLOSE calls. I need help to
> figure out why this happens. Is there any documentation about filter
> drivers which layer between the SCSI class driver and the port driver ?
>
> Thanks in advance,
> Unni
>
> ---
> You are currently subscribed to ntdev as: [email protected]
> To unsubscribe send a blank email to $subst('Email.Unsub')
>
> ---
> You are currently subscribed to ntdev as: [email protected]
> To unsubscribe send a blank email to $subst('Email.Unsub')
www.osr.com and make sure that your driver is correctly filtering what you
think your filtering. Second, I would make sure that you've loaded
correctly. I assume that you are loading as part of SCSI CLASS group and
are the first driver in the group to be loaded (in the same boot phase as
the scsi class drivers). Then I would make sure that you are correctly
attaching to SCSIPORT0 through SCSIPORTN.
Finally, if none of the above help, then maybe you need to post your driver
entry code so that people can look at it.
-----Original Message-----
From: Unnikrishnan P K [mailto:[email protected]]
Sent: Wednesday, March 22, 2000 11:40 AM
To: NT Developers Interest List
Subject: [ntdev] RE: Scsi Port Filter driver
Hi Mark,
I have not been able to receive the IRP_MJ_SCSI commands in my filter
driver. But the OSR book mentions about filter driver being able to receive
all commands. Is there any flag setting required ?
Thanks in advance,
Unni
Mark Cariddi wrote:
> Are you handling IRP_MJ_SCSI commands? I have a SCSI filter and it is
> working and capturing requests correctly.
>
> --Mark
>
> Mark J. Cariddi
> Consulting Associate
> [email protected]
>
> OSR Open Systems Resources, Inc.
> 105 Route 101A, Suite 19
> Amherst, New Hampshire 03031
> 603/595-6500
> 603/595-6503 Fax
> http://www.osr.com
>
> ****************************************
> The definitive book on writing Windows NT
> device drivers, "Windows NT Device Driver
> Development" by OSR consulting partners
> Peter Viscarola and Tony Mason, is now
> available for ordering.
> ****************************************
>
> -----Original Message-----
> From: Unnikrishnan P K [mailto:[email protected]]
> Sent: Wednesday, March 22, 2000 10:12 AM
> To: NT Developers Interest List
> Subject: [ntdev] Scsi Port Filter driver
>
> Hi all,
> I have developed a filter driver which layers itself between the SCSI
> port driver and the Disk/class driver for NT4.0. The driver loads
> properly, but it does not receive any IRPs other than the ones with the
> IOCTL_SCSI_GET_INQUIRY_DATA, IOCTL_SCSI_GET_CAPABILITIES and
> IOCTL_SCSI_RESCAN_BUS and the CREATE and CLOSE calls. I need help to
> figure out why this happens. Is there any documentation about filter
> drivers which layer between the SCSI class driver and the port driver ?
>
> Thanks in advance,
> Unni
>
> ---
> You are currently subscribed to ntdev as: [email protected]
> To unsubscribe send a blank email to $subst('Email.Unsub')
>
> ---
> You are currently subscribed to ntdev as: [email protected]dia.hp.com
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