linux-kernel - Re: [RFC PATCH 1/2] Union Mount: glibc readdir support

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Date:	Tue, 06 May 2008 14:46:14 +0900
From:	hooanon05@...oo.co.jp
To:	bharata@...ux.vnet.ibm.com
Cc:	Ulrich Drepper <drepper@...hat.com>, bsn.0007@...il.com,
	libc-alpha@...rceware.org, Jan Blunck <jblunck@...e.de>,
	Erez Zadok <ezk@...sunysb.edu>, linux-kernel@...r.kernel.org,
	linux-fsdevel@...r.kernel.org, viro@...iv.linux.org.uk,
	Christoph Hellwig <hch@....de>, Mingming Cao <cmm@...ibm.com>,
	Dave Hansen <haveblue@...ibm.com>,
	Trond Myklebust <trond.myklebust@....uio.no>,
	David Woodhouse <dwmw2@...radead.org>
Subject: Re: [RFC PATCH 1/2] Union Mount: glibc readdir support 


Bharata B Rao:
> At the server side, I can't see how NFS server could export a union.
> I don't see how this could be sanely done with Union Mount. Erez, how
> does Unionfs handle this ?
> 
> Is dis-allowing NFS-exporting of unions an option ?

As a note, there were many requests for aufs to support NFS-exporting.
And it was already implemented. The encode/decode_fh functions in aufs
behave like sub-nfsd.


Junjiro Okajima
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