From: Sushil Mantri Subject: A stackable filesystem to trace low level filesystem operations Date: Tue, 3 Jan 2012 16:20:21 -0500 Message-ID: Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 To: linux-ext4@vger.kernel.org Return-path: Received: from mail-wi0-f174.google.com ([209.85.212.174]:44229 "EHLO mail-wi0-f174.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754671Ab2ACVUX (ORCPT ); Tue, 3 Jan 2012 16:20:23 -0500 Received: by wibhm6 with SMTP id hm6so9446628wib.19 for ; Tue, 03 Jan 2012 13:20:22 -0800 (PST) Sender: linux-ext4-owner@vger.kernel.org List-ID: 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 Can you please suggest me what is the best option i have. I am currently looking at SystemTap. Thanks, Sushil