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IoBuildDeviceIoControlRequest() and IoCallDriver()
OSR_Community_User
Member Posts: 110,217
in NTDEV
Hi All,
On getting a IOCTL from a win32 application, in my filter driver, I'm using IoBuildDeviceIoControlRequest() and IoCallDriver() to send block Read/Write commands(special purpose) to the underlying SCSI Port driver. I'm supplying a event to IoBuildDeviceIoControlRequest() and also waiting on it, if IoCallDriver() returns with STATUS_PENDING. But very rarely, the Read/Write I send to the underlying driver never returns(the event never gets signaled).
Can anybody tell me what might be the problem.
Thanks,
Sajeev.
On getting a IOCTL from a win32 application, in my filter driver, I'm using IoBuildDeviceIoControlRequest() and IoCallDriver() to send block Read/Write commands(special purpose) to the underlying SCSI Port driver. I'm supplying a event to IoBuildDeviceIoControlRequest() and also waiting on it, if IoCallDriver() returns with STATUS_PENDING. But very rarely, the Read/Write I send to the underlying driver never returns(the event never gets signaled).
Can anybody tell me what might be the problem.
Thanks,
Sajeev.
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Comments
IRP_MJ_WRITE requests? If so, this is not correct, you shouold use
IoBuildSynchronousFsdRequest() or IoBuildAsynchronousFsdRequest().
Jamey
-----Original Message-----
From: [email protected]
[mailto:[email protected]]On Behalf Of Sajeev
Sent: Thursday, June 15, 2000 11:53 AM
To: NT Developers Interest List
Subject: [ntdev] IoBuildDeviceIoControlRequest() and IoCallDriver()
Hi All,
On getting a IOCTL from a win32 application, in my filter driver, I'm
using IoBuildDeviceIoControlRequest() and IoCallDriver() to send block
Read/Write commands(special purpose) to the underlying SCSI Port driver. I'm
supplying a event to IoBuildDeviceIoControlRequest() and also waiting on it,
if IoCallDriver() returns with STATUS_PENDING. But very rarely, the
Read/Write I send to the underlying driver never returns(the event never
gets signaled).
Can anybody tell me what might be the problem.
Thanks,
Sajeev.
Thanks,
Sajeev
----- Original Message -----
From: Jamey Kirby
To: NT Developers Interest List
Sent: Thursday, June 15, 2000 11:53 AM
Subject: [ntdev] RE: IoBuildDeviceIoControlRequest() and IoCallDriver()
Are you using IoBuildDeviceIoControlRequest() to build IRP_MJ_READ and IRP_MJ_WRITE requests? If so, this is not correct, you shouold use IoBuildSynchronousFsdRequest() or IoBuildAsynchronousFsdRequest().
Jamey
-----Original Message-----
From: xxx[email protected] [mailto:[email protected]]On Behalf Of Sajeev
Sent: Thursday, June 15, 2000 11:53 AM
To: NT Developers Interest List
Subject: [ntdev] IoBuildDeviceIoControlRequest() and IoCallDriver()
Hi All,
On getting a IOCTL from a win32 application, in my filter driver, I'm using IoBuildDeviceIoControlRequest() and IoCallDriver() to send block Read/Write commands(special purpose) to the underlying SCSI Port driver. I'm supplying a event to IoBuildDeviceIoControlRequest() and also waiting on it, if IoCallDriver() returns with STATUS_PENDING. But very rarely, the Read/Write I send to the underlying driver never returns(the event never gets signaled).
Can anybody tell me what might be the problem.
Thanks,
Sajeev.