linux-ext4 - Re: [PATCH 02/18] xstat: Add a pair of system calls to make extended file stats available [ver #6]

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Date:	Thu, 22 Jul 2010 11:02:04 -0700
From:	Jeremy Allison <jra@...ba.org>
To:	Trond Myklebust <trond.myklebust@....uio.no>
Cc:	Linus Torvalds <torvalds@...ux-foundation.org>,
	Jeremy Allison <jra@...ba.org>, Volker.Lendecke@...net.de,
	David Howells <dhowells@...hat.com>,
	Jan Engelhardt <jengelh@...ozas.de>,
	linux-cifs@...r.kernel.org, linux-nfs@...r.kernel.org,
	samba-technical@...ts.samba.org, linux-kernel@...r.kernel.org,
	viro@...iv.linux.org.uk, linux-fsdevel@...r.kernel.org,
	linux-ext4@...r.kernel.org
Subject: Re: [PATCH 02/18] xstat: Add a pair of system calls to make
 extended  file stats available [ver #6]

On Thu, Jul 22, 2010 at 12:58:50PM -0400, Trond Myklebust wrote:
> 
> That would make it impossible to export the filesystem with NFSv2 and
> v3. They do rely on ctime checking for certain operations (e.g. deciding
> when to invalidate access and acl caches). NFSv4 needs this too if the
> filesystem has no dedicated change attribute.
> 
> Still, I suppose the market for exporting the same filesystem with both
> NFS and Samba is limited...

Ask NetApp about that :-). They have built a rather large
business on just that fact :-).

Jeremy.
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