From mboxrd@z Thu Jan 1 00:00:00 1970 From: Neil Brown Subject: Re: [PATCH -V18 04/13] vfs: Allow handle based open on symlinks Date: Wed, 25 Aug 2010 12:06:52 +1000 Message-ID: <20100825120652.1a183152@notabene> References: <1282269097-26166-1-git-send-email-aneesh.kumar@linux.vnet.ibm.com> <1282269097-26166-5-git-send-email-aneesh.kumar@linux.vnet.ibm.com> <20100820083057.GA10039@infradead.org> <20100820195303.20b17210@notabene> <20100820115135.GQ31363@ZenIV.linux.org.uk> <20100821100900.4b15fe08@notabene> <17761610-AFA9-4BB5-AF62-CD54D67F5C79@oracle.com> <20100823090604.6c735c80@notabene> Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Cc: Andreas Dilger , Al Viro , Christoph Hellwig , "adilger@sun.com" , "corbet@lwn.net" , "npiggin@kernel.dk" , "hooanon05@yahoo.co.jp" , "bfields@fieldses.org" , "miklos@szeredi.hu" , "linux-fsdevel@vger.kernel.org" , "sfrench@us.ibm.com" , "philippe.deniel@CEA.FR" , "linux-kernel@vger.kernel.org" To: "Aneesh Kumar K. V" Return-path: Received: from cantor.suse.de ([195.135.220.2]:46080 "EHLO mx1.suse.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S932087Ab0HYCHH (ORCPT ); Tue, 24 Aug 2010 22:07:07 -0400 In-Reply-To: Sender: linux-fsdevel-owner@vger.kernel.org List-ID: On Mon, 23 Aug 2010 08:19:48 +0530 "Aneesh Kumar K. V" wrote: > On Mon, 23 Aug 2010 09:06:04 +1000, Neil Brown wrote: > > [[ Following this approach I would like to avoid any filehandle-specific > > syscalls altogether. > > Just use a *at syscall with AT_FILE_HANDLE for filehandle lookup, and use > > getxattr('system:linux.file_handle') to get the filehandle for a given path. > > > > Ofcourse we would need to at *at versions of the *xattr syscalls, but that is > > probably a good idea anyway. > > ]] > > sys_setxattrat would take 7 arguments. > I count 6 - assuming we share the 'flags' argument. There are only 2 xattr flags currently so there should be room to share. dirfd path name value size flags == 6 NeilBrown