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20 Mar 17 13:52
Join Date: 23 Feb 2011
Posts To This List: 174
How to flush memory mapped files?
Read the archives, there is no way to guarantee a flush. Welcome to the
challenges of encryption drivers.
Windows Driver Consulting
[mailto:email@example.com] On Behalf Of
Sent: Monday, March 20, 2017 1:48 PM
To: Windows File Systems Devs Interest List
Subject: [ntfsd] How to flush memory mapped files?
Dear all, it has been a long time since I asked the last question few months
Now I encounter a new problem:
I build an encryption filter driver with Isolation Filter framework, my
filter driver maintains the memory/cache for white-list programs, and the
programs-not-in-white-list just use the memory/cache of system, this design
just worked well for most scenes. But for notepad.exe, my filter driver went
into a wrong way, after writing some text and save the file, I found that
the content in the file doesn't changed(I'm quite sure I have changed the
content of that txt).
In order to guarantee that programs-not-in-white-list can get the right and
up-to-date data, I think my filter driver should flush the memory mapped
files into the disk, but I didn't find a way to do so, is there any
functions could flush the memory mapped files into the disk?
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