Filter driver for Network File I/O'

NTFSD
1

Hi ALl,

Has any budy implemented a filter driver for intercepting file i/o’s on a network drive.
We tried with our own mini-filter. We created a mini-filter for local drives and it is working perfectly but for network drives we found some inconsistencies with cached and non-cached IO’s.

Is Mini-Filter the right approach going forward, or should try to createa full-fledged filter driver for handling Network File I/O’s.

It would be great if some one can share his experience and guide us in just the right direcction.

thanks and regards

2

It depends on what you’re trying to do.

I filter network-connected files in my mini-filter all the time with no problems. But I don’t try to do something that doesn’t make sense for a network connection.

So the obvious question is: What are you trying to do? What doesn’t work?

Ken

-----Original Message-----
From: xxxxx@lists.osr.com [mailto:xxxxx@lists.osr.com] On Behalf Of xxxxx@rsystems.com
Sent: Monday, March 31, 2008 5:51 PM
To: Windows File Systems Devs Interest List
Subject: [ntfsd] Filter driver for Network File I/O’

Hi ALl,

Has any budy implemented a filter driver for intercepting file i/o’s on a network drive.
We tried with our own mini-filter. We created a mini-filter for local drives and it is working perfectly but for network drives we found some inconsistencies with cached and non-cached IO’s.

Is Mini-Filter the right approach going forward, or should try to createa full-fledged filter driver for handling Network File I/O’s.

It would be great if some one can share his experience and guide us in just the right direcction.

thanks and regards

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3

>We tried with our own mini-filter. We created a mini-filter for local drives and

it is working perfectly but for network drives we found some inconsistencies
with cached and non-cached IO’s.

SMB converts non-cached IOs to cached IOs with WRITE_THROUGH switched on. Write only handles are always non-cached. See smbmrx sample (sys\openclose.c) in WDK for details.

-bg