linux-kernel - Re: [RFC 12/26] ext2 white-out support

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Message-ID: <20070801180352.GA15061@filer.fsl.cs.sunysb.edu>
Date:	Wed, 1 Aug 2007 14:03:52 -0400
From:	Josef Sipek <jsipek@....cs.sunysb.edu>
To:	Jan Engelhardt <jengelh@...putergmbh.de>
Cc:	Jan Blunck <jblunck@...e.de>, linux-fsdevel@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	Bharata B Rao <bharata@...ux.vnet.ibm.com>
Subject: Re: [RFC 12/26] ext2 white-out support

On Wed, Aug 01, 2007 at 07:58:49PM +0200, Jan Engelhardt wrote:
> 
> On Jul 31 2007 12:36, Josef Sipek wrote:
> >[2] http://www.filesystems.org/unionfs-odf.txt
> 
> >Instead, the new ODF code stores whiteouts as hardlinks to a special
> >(regular) zero-length file in odf (/odf/whiteout), and it stores opaqueness
> >information for directories in the inode GID bits in an ODF file system
> >(e.g., ext2, XFS, etc.) on the local machine.  This avoids the name-space
> >pollution and avoids races with network file systems, while minimizing inode
> >consummation in /odf.
> 
> Inode GID bits - are you reducing my 32 bits of gid_t to 31 bits?
> That does not work out either.

No. The ODF code just uses the GID bits to store extra info. The GID is
_NOT_ used to store the GID of the file. The GID of the file is still coming
from the branches.

Josef 'Jeff' Sipek.

-- 
I abhor a system designed for the "user", if that word is a coded pejorative
meaning "stupid and unsophisticated."
		- Ken Thompson
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