linux-ext4 - Re: [PATCH] Add extent conversion support to chattr

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Date:	Tue, 9 Sep 2008 18:06:45 +0530
From:	"Aneesh Kumar K.V" <aneesh.kumar@...ux.vnet.ibm.com>
To:	Christoph Hellwig <hch@...radead.org>
Cc:	tytso@....ed, adilger@....com, linux-ext4@...r.kernel.org
Subject: Re: [PATCH] Add extent conversion support to chattr

On Tue, Sep 09, 2008 at 07:46:47AM -0400, Christoph Hellwig wrote:
> On Tue, Sep 09, 2008 at 02:42:22PM +0530, Aneesh Kumar K.V wrote:
> > This patch adds new option, -E to chattr. The -E option
> > is used to convert the ext3 format (non extent) file
> > to ext4 (extent) format. This can be used to migrate
> > the ext3 file system to ext4 file system.
> 
> I think this is an awkware interfac.  Chattr is supposed to set simple
> binary flags and not a front end to complicated filesystem conversions.
> 

Since chattr is used to set inode flags and since migrate can be looked
at as setting extent flags (with the side effect that we change the 
inode format) I used chattr interface. Last patch i sent actually added a new
command e4migrate. Let me know if you have any suggestion related to
which command is best suited for setting extent flags.

-aneesh
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