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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Message-ID: <alpine.LSU.2.01.1007222004430.4215@obet.zrqbmnf.qr>
Date:	Thu, 22 Jul 2010 20:05:00 +0200 (CEST)
From:	Jan Engelhardt <jengelh@...ozas.de>
To:	Jeremy Allison <jra@...ba.org>
cc:	Trond Myklebust <trond.myklebust@....uio.no>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	Volker.Lendecke@...net.de, David Howells <dhowells@...hat.com>,
	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 Thursday 2010-07-22 20:02, Jeremy Allison wrote:
>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 :-).

What would ZFS do? :p
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