Neal,
What about support for the Mini Filter in Windows Storage Server?
Ken
-----Original Message-----
From: Neal Christiansen [mailto:xxxxx@windows.microsoft.com]
Sent: Thursday, December 04, 2003 1:05 PM
To: Windows File Systems Devs Interest List
Subject: [ntfsd] Filter Manager
I want to update the file system filter developer community with the
latest information that was announced at the November 2003 IFS PlugFest.
The PlugFest was part of the DDC (Driver Developers Conference) that was
held November 11-14 on the Microsoft campus.
At this time we announced the platforms the new file system filter
manager will be released on. These include:
- XP SP2
- Server 2003 SP1
- Windows 2000 (release mechanisms to be determined)
- Longhorn
Full support for developing mini-filters will be released in the Server
2003 IFSKit. This kit will support mini-filter development for both XP
SP2 and Server 2003 SP1. A beta version of this kit will be available
for the XP SP2 time frame. An alpha version of this kit was given out
at the last PlugFest.
Now is the time to start making plans to port your existing filters to
be mini-filters. Some reason for doing this are:
-
The elimination of reboots. The filter manager supports mini-filters
being loaded and unloaded at any time. -
Deterministic load ordering. The filter manager supports a new
“altitude” model for controlling the order mini-filters are attached. A
mini-filter will be attached at its proper altitude regardless of when
it is loaded. -
Reduction of kernel stack overflows. The filter manager uses a new
callback model instead of the existing call-through model. This greatly
reduces the amount of kernel stack consumed by filters. -
Full interoperability support between existing filters and
mini-filters. -
Elimination of substantial complexity from the typical filter driver
by providing built in support for functionality common to most filters.
Some of this support includes: -
Retrieving file names
-
Normalizing file names (removal of short names)
-
Parsing file names
-
Name caching
-
Context support
-
IO library which supports targeting operations below your
filter
There are many other reasons as well.
Please fell free to start asking Filter Manager related questions on
this list.
Neal Christiansen
Microsoft File System Filter Group
This posting is provided “AS IS” with no warranties, and confers no
rights.
Questions? First check the IFS FAQ at
https://www.osronline.com/article.cfm?id=17
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