linux-ext4 - Re: [PATCH 1/4] vfs: vfs-level fiemap interface

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Message-Id: <2EC8176B-0AFA-4B36-A2F5-E51753A576A5@cam.ac.uk>
Date:	Sat, 13 Sep 2008 22:17:07 +0100
From:	Anton Altaparmakov <aia21@....ac.uk>
To:	Theodore Ts'o <tytso@....edu>
Cc:	linux-fsdevel@...r.kernel.org, linux-ext4@...r.kernel.org,
	akpm@...uxfoundation.org, Mark Fasheh <mfasheh@...e.com>
Subject: Re: [PATCH 1/4] vfs: vfs-level fiemap interface

Hi,

Just a quick question (not a criticism of the patches in any way):

Is there a specific reason that the flag FIEMAP_EXTENT_DATA_ENCRYPTED  
exists?  I am only asking because there isn't a  
FIEMAP_EXTENT_DATA_COMPRESSED flag yet the effect on the data is the  
same.  I suppose one could argue that compression is a form of  
encryption (as one cannot read the data on disk without decompressing  
it) and thus for compressed files I can just set  
FIEMAP_EXTENT_DATA_ENCRYPTED, too?

Best regards,

	Anton
-- 
Anton Altaparmakov <aia21 at cam.ac.uk> (replace at with @)
Unix Support, Computing Service, University of Cambridge, CB2 3QH, UK
Linux NTFS maintainer, http://www.linux-ntfs.org/

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