Return-Path: linux-nfs-owner@vger.kernel.org Received: from mx11.netapp.com ([216.240.18.76]:13343 "EHLO mx11.netapp.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752018Ab3J0Sl2 convert rfc822-to-8bit (ORCPT ); Sun, 27 Oct 2013 14:41:28 -0400 From: "Myklebust, Trond" To: Simo Sorce CC: "Myklebust, Trond" , Hellwig Christoph , "Matt W. Benjamin" , "Dr Fields James Bruce" , Christoph Anton Mitterer , Mailing List Linux NFS , Wheeler Ric Subject: Re: XATTRs in NFS? Date: Sun, 27 Oct 2013 18:41:25 +0000 Message-ID: References: <312486415.16.1382796101374.JavaMail.root@thunderbeast.private.linuxbox.com> <5FC093E3-1CD3-4AC7-A91F-37C8DEC6BEFE@netapp.com> <20131027165628.GA447@infradead.org> <95C57010-2A89-423C-8668-DF963ABF8BB6@netapp.com> <1382898655.899.122.camel@willson.li.ssimo.org> In-Reply-To: <1382898655.899.122.camel@willson.li.ssimo.org> Content-Type: text/plain; charset="us-ascii" MIME-Version: 1.0 Sender: linux-nfs-owner@vger.kernel.org List-ID: On Oct 27, 2013, at 2:30 PM, Simo Sorce wrote: > On Sun, 2013-10-27 at 18:07 +0000, Myklebust, Trond wrote: >> On Oct 27, 2013, at 12:56 PM, Christoph Hellwig wrote: >> >>> On Sun, Oct 27, 2013 at 12:31:46PM +0000, Myklebust, Trond wrote: >>>> The NFSv4 working group has no authority to do so. POSIX would be the right address. >>> >>> The complete lack of clue, authority or even defined semantics didn't >>> stop them from defining their ACL model. User extended attributes are >>> harmless compared to that, even if everyone has subtly different >>> flavours. >>> >> >> The user xattrs are in principle harmless. What about "trusted.*"? >> >> BTW: caching any xattrs is a problem. There is no close-to-open model that you can use and neither is there locking. This is already causing a problem for labeled nfs... > > You could start without caching them. > I'm not going to start anything... Trond