Pending I/O Read/Write request in Disk Filter?

NTDEV
1

Hi all,
i want to write a disk upper filter driver that will not serve any I/O
Read/Write requests untill several condition has been meet (for example, a
special IOCtrl has been received in the filer driver).
Should i completed the request with IoCompleteRequest and return PENDING
status? if not with what status code should i return?

thanks!

2

If you are going to pend it, call IoMarkIrpPending and return STATUS_PENDING, do not complete it (or send it down the stack) until your condition is met. Be careful not to do this for paging io.

d

sent from a phpne with no keynoard

From: jonatan perry
Sent: May 16, 2010 12:23 PM
To: Windows System Software Devs Interest List
Subject: [ntdev] Pending I/O Read/Write request in Disk Filter?

Hi all,
i want to write a disk upper filter driver that will not serve any I/O Read/Write requests untill several condition has been meet (for example, a special IOCtrl has been received in the filer driver).
Should i completed the request with IoCompleteRequest and return PENDING status? if not with what status code should i return?

thanks!
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3

No, return the pending status without completing the request.

–
Maxim S. Shatskih
Windows DDK MVP
xxxxx@storagecraft.com
http://www.storagecraft.com

“jonatan perry” wrote in message news:xxxxx@ntdev…
Hi all,
i want to write a disk upper filter driver that will not serve any I/O Read/Write requests untill several condition has been meet (for example, a special IOCtrl has been received in the filer driver).
Should i completed the request with IoCompleteRequest and return PENDING status? if not with what status code should i return?

thanks!