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Subject: Need to intercept open&write calls for vdi file when VirtualBox is
 working.
From: Sergey Malykhin <sergey.malykhin@gmail.com>
To: linux-kernel@vger.kernel.org
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Date: Wed, 24 Mar 2010 12:04:33 +0600
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Hi,

My problem - I have to intercept open&write function calls to .vdi file
when VirtualBox is working to control which sectors of vdi file were
changed, i.e. I need to get 1. what file was open for writing; 2. data
from buffer; 3. size of data; 4. offset in file;

I tryed: 
          - LD_PRELOAD - not helped

          - using fuse - rewrote write call and successfully
intercepted, but fuse is slow.

I have possibilities to patch ext3 or patch inotify.

Is there any better way to do it?

TIA