linux-ext4 - Re: File permissions in ext4

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Date:	Thu, 01 Aug 2013 12:27:56 -0500
From:	Eric Sandeen <sandeen@...hat.com>
To:	Felipe Monteiro de Carvalho <felipemonteiro.carvalho@...il.com>
CC:	linux-ext4@...r.kernel.org
Subject: Re: File permissions in ext4

On 8/1/13 7:34 AM, Felipe Monteiro de Carvalho wrote:
> Hello,
> 
> Ok, I found that the permissions that I was looking for are stored in
> ext4_inode.i_mode ... but still there is the question: What is ACL
> used for then, and when is it different than zero?
> 
> thanks =)
> 

It is the block number containing an extended attribute for that inode,
if any; that extended attribute may be a file ACL.

It's a bit odd to call the xattr block "ACL" but it is what it is.  ;)

-Eric
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