From mboxrd@z Thu Jan 1 00:00:00 1970 From: Bharata B Rao Subject: Re: [RFC PATCH 1/2] Union Mount: glibc readdir support Date: Tue, 6 May 2008 09:51:17 +0530 Message-ID: <20080506042117.GA29298@in.ibm.com> References: <20080429133201.GA9938@localhost.localdomain> <20080429133346.GB9938@localhost.localdomain> <48195E69.3030701@redhat.com> Reply-To: bharata@linux.vnet.ibm.com Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Cc: bsn.0007@gmail.com, libc-alpha@sourceware.org, Jan Blunck , Erez Zadok , linux-kernel@vger.kernel.org, linux-fsdevel@vger.kernel.org, viro@zeniv.linux.org.uk, Christoph Hellwig , Mingming Cao , Dave Hansen , Trond Myklebust , David Woodhouse To: Ulrich Drepper Return-path: Received: from e33.co.us.ibm.com ([32.97.110.151]:39698 "EHLO e33.co.us.ibm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752890AbYEFEV3 (ORCPT ); Tue, 6 May 2008 00:21:29 -0400 Content-Disposition: inline In-Reply-To: <48195E69.3030701@redhat.com> Sender: linux-fsdevel-owner@vger.kernel.org List-ID: On Wed, Apr 30, 2008 at 11:08:41PM -0700, Ulrich Drepper wrote: > > Before anything further is discussed I need to know how you expect to > handle NFS? I don't see how, with a userlevel readdir implementation, > you can support NFS. At the client side, I don't see a problem with unioning NFS with other FS. Kernel would still return all dirents of the union including those from NFS and glibc readdir would be able to handle them appropriately. Or am I missing something ? At the server side, I can't see how NFS server could export a union. I don't see how this could be sanely done with Union Mount. Erez, how does Unionfs handle this ? Is dis-allowing NFS-exporting of unions an option ? Regards, Bharata.