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Date:	Wed, 4 Jan 2012 11:03:14 +1100
From:	Dave Chinner <david@...morbit.com>
To:	Sushil Mantri <sushilmantri@...il.com>
Cc:	linux-ext4@...r.kernel.org
Subject: Re: A stackable filesystem to trace low level filesystem operations

On Tue, Jan 03, 2012 at 04:20:21PM -0500, Sushil Mantri wrote:
> Hi All,
> 
> Sorry but this isn't a ext4 specific question but a general filesystem question.
> 
> I am looking for a way to track filesystem level operation like
> operation(read/write), filename, offset, size of read/write, pid of
> the requesting process. The goal of my project is to collect such
> traces and understand access usage of directories and more. I would
> like to filter other operation like open,close, etc and requests to
> procfs, etc. There was a stackable file system earlier called Tracefs.
> It isn't supported anymore though. The original paper can be found
> here: filesystems.org/docs/tracefs-fast04/tracefs.ps

Add your own trace points to the VFS and extract and filter them
with trace-cmd.

Cheers,

Dave.
-- 
Dave Chinner
david@...morbit.com
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