Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755372Ab0GGSUH (ORCPT ); Wed, 7 Jul 2010 14:20:07 -0400 Received: from cantor.suse.de ([195.135.220.2]:48735 "EHLO mx1.suse.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1756242Ab0GGSUE (ORCPT ); Wed, 7 Jul 2010 14:20:04 -0400 Date: Thu, 8 Jul 2010 04:20:01 +1000 From: Nick Piggin To: "Aneesh Kumar K. V" Cc: hch@infradead.org, viro@zeniv.linux.org.uk, adilger@sun.com, corbet@lwn.net, serue@us.ibm.com, neilb@suse.de, hooanon05@yahoo.co.jp, bfields@fieldses.org, linux-fsdevel@vger.kernel.org, sfrench@us.ibm.com, philippe.deniel@CEA.FR, linux-kernel@vger.kernel.org Subject: Re: [PATCH -V14 04/11] vfs: Allow handle based open on symlinks Message-ID: <20100707182001.GG9263@laptop> References: <1276621981-2774-1-git-send-email-aneesh.kumar@linux.vnet.ibm.com> <1276621981-2774-5-git-send-email-aneesh.kumar@linux.vnet.ibm.com> <20100707152303.GS11732@laptop> <87d3uzfeej.fsf@linux.vnet.ibm.com> <20100707165719.GC9263@laptop> <874ogbfaas.fsf@linux.vnet.ibm.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <874ogbfaas.fsf@linux.vnet.ibm.com> User-Agent: Mutt/1.5.20 (2009-06-14) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1214 Lines: 27 On Wed, Jul 07, 2010 at 11:23:31PM +0530, Aneesh Kumar K. V wrote: > On Thu, 8 Jul 2010 02:57:19 +1000, Nick Piggin wrote: > > I haven't followed this thread closely, so can you just go back > > and explain to me why you need this? Ie. that you can't achieve with > > a path-to-handle follow/nofollow option. > > > We need to be able to read the link target using file handle. The exact > usecase i have is with respect to implementing READLINK operation on a > userspace NFS server. The request contain the file handle and the > response include target name. Fair point, could you include this stuff in your changelog? It may help with other people reviewing it too who have not followed closely. > Similarly we need to able to get file attribute based on file handle. > I was using readlinkat and fstat to obtain both the above information > using the descriptor returned by open_by_handle on a file handle > representing symlink > > -aneesh -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/