From mboxrd@z Thu Jan  1 00:00:00 1970
From: hooanon05@yahoo.co.jp
Subject: Re: [RFC PATCH 1/2] Union Mount: glibc readdir support
Date: Tue, 06 May 2008 14:46:14 +0900
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References: <20080429133201.GA9938@localhost.localdomain> <20080429133346.GB9938@localhost.localdomain> <48195E69.3030701@redhat.com> <20080506042117.GA29298@in.ibm.com>
Cc: Ulrich Drepper <drepper@redhat.com>, bsn.0007@gmail.com,
	libc-alpha@sourceware.org, Jan Blunck <jblunck@suse.de>,
	Erez Zadok <ezk@cs.sunysb.edu>, linux-kernel@vger.kernel.org,
	linux-fsdevel@vger.kernel.org, viro@zeniv.linux.org.uk,
	Christoph Hellwig <hch@lst.de>, Mingming Cao <cmm@us.ibm.com>,
	Dave Hansen <haveblue@us.ibm.com>,
	Trond Myklebust <trond.myklebust@fys.uio.no>,
	David Woodhouse <dwmw2@infradead.org>
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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