As per documentation MFT reflects all changes to a file on volume, say " d:".
How can we get this information in kernel - mode?
I have observed memory mapped IO not reflected when using MFT info from usermode.
Doesnt the NTFS store mmf io changes in it?
You probably mean USN Journal and it is very well documented on MSDN. Since
USN is part of NTFS, it doesn’t store any information about memory mapped
IOs (see USN_REASON_* flags in this MSDN link:
http://msdn.microsoft.com/en-us/library/windows/desktop/aa365722(v=vs.85%2
9.aspx; only these events are stored in USN).
USN can be also accessed from kernel-mode (see “fsutil.exe usn” command to
play with USN from user-mode).
thanks Petr.
On Fri, Oct 10, 2014 at 9:44 PM, Petr Kurtin wrote:
> You probably mean USN Journal and it is very well documented on MSDN. Since
> USN is part of NTFS, it doesn’t store any information about memory mapped
> IOs (see USN_REASON_* flags in this MSDN link:
>
> http://msdn.microsoft.com/en-us/library/windows/desktop/aa365722(v=vs.85%2
> 9.aspx; only these events are stored in USN).
>
> USN can be also accessed from kernel-mode (see “fsutil.exe usn” command to
> play with USN from user-mode).
>
>
>
>
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Hi all,
Consider following scenario:
there a.txt on c:\
An application trial.exe opens this existing file and gets handle to it. Then memory maps using aquired handle. closes the handle. maps a view, writes data(modifies existing data) to it, unmaps the file and exits.
My questions are:
- what is the role of ntfs in managing the last unmap?
- are there any alternate named or unnamed streams involved in the process?
- how io mgr, mm, cc mgr interact with ntfs with respect to above scenario?
- when prefetch for particular file is off no IRP_MJ_WRITE is generated in above scenario. Why such behaviour?
there is a lot of discussion on this list in past better to search for this topic.
hi tuten,
I am already referring those discussions from the past.
I am also able to track fully modified files.
But i am not able to track partial modification of files.
Maybe I am missing out on something.
Therefore, I have posted these questions so as to get some
direction/references.
On Tue, Oct 14, 2014 at 10:13 AM, wrote:
> there is a lot of discussion on this list in past better to search for
> this topic.
>
>
>
> —
> NTFSD is sponsored by OSR
>
> OSR is hiring!! Info at http://www.osr.com/careers
>
> For our schedule of debugging and file system seminars visit:
> http://www.osr.com/seminars
>
> To unsubscribe, visit the List Server section of OSR Online at
> http://www.osronline.com/page.cfm?name=ListServer
>