Return-Path: linux-nfs-owner@vger.kernel.org Received: from oproxy14-pub.unifiedlayer.com ([67.222.51.224]:59954 "HELO oproxy14-pub.unifiedlayer.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with SMTP id S1752523Ab3EIRhN convert rfc822-to-8bit (ORCPT ); Thu, 9 May 2013 13:37:13 -0400 Subject: Re: [PATCH v4 0/5] nfsd + hfsplus: introduce generalized version of NFSv4 ACLs <-> POSIX ACLs mapping algorithms Mime-Version: 1.0 (Apple Message framework v1085) Content-Type: text/plain; charset=us-ascii From: Vyacheslav Dubeyko In-Reply-To: <1368118877.3282.104.camel@leira.trondhjem.org> Date: Thu, 9 May 2013 21:34:50 +0400 Cc: Linux FS devel list , Linux NFS list , "J. Bruce Fields" , Al Viro , Christoph Hellwig , "Hin-Tak Leung" , Andrew Morton Message-Id: <9841F318-DA62-4ACF-AA33-0474DBC2B107@dubeyko.com> References: <1368117430.5695.30.camel@slavad-ubuntu-12.04> <1368118877.3282.104.camel@leira.trondhjem.org> To: "Myklebust, Trond" Sender: linux-nfs-owner@vger.kernel.org List-ID: On May 9, 2013, at 9:01 PM, Myklebust, Trond wrote: [snip] > > How does this make sense? There is no lossless mapping of NFSv4 acls > into POSIX acls; the latter doesn't have any equivalent of the DENY aces > so you cannot represent the full set of acls that can be set using MacOS > on the same filesystem. > > Shouldn't you rather be looking at the richacl patch sets? > Yes, I understand the nature of such mapping and impossibility of mapping NFSv4 ACLs to POSIX ACLs in some cases. But, as I understand, the richacl patch set is not mainline yet. And even if it will be in mainline then a user can have choice to use POSIX ACLs or richacls. So, we need to map NFSv4 ACLs <-> POSIX ACLs in hfsplus for the case of using POSIX ACLs model. I think that to have such mapping is better than to have nothing. Moreover, a user can use HFS+ filesystem with using POSIX ACLs only under Linux. Thereby, the generalization of mapping NFSv4 ACLs <-> POSIX ACLs makes sense, from my viewpoint. With the best regards, Vyacheslav Dubeyko. > -- > Trond Myklebust > Linux NFS client maintainer > > NetApp > Trond.Myklebust@netapp.com > www.netapp.com