From: Greg Banks Subject: Re: [RFC][PATCH 0/5] NFS: trace points added to mounting path Date: Fri, 23 Jan 2009 09:54:20 +1100 Message-ID: <4978F91C.4090208@melbourne.sgi.com> References: <4970B451.4080201@RedHat.com> <5B2817A2-B0FF-4FB5-9244-9E13C55EF6B2@oracle.com> <497757D1.7090908@RedHat.com> <49777988.6010401@RedHat.com> <4977A385.8000406@melbourne.sgi.com> <20090121225619.GI4295@fieldses.org> <497897F5.9030005@RedHat.com> <20090122164503.GC13129@fieldses.org> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 Cc: Steve Dickson , Linux NFS Mailing list , SystemTAP , Linux NFSv4 mailing list To: "J. Bruce Fields" Return-path: Received: from relay2.sgi.com ([192.48.179.30]:56620 "EHLO relay.sgi.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1753353AbZAVWze (ORCPT ); Thu, 22 Jan 2009 17:55:34 -0500 In-Reply-To: <20090122164503.GC13129@fieldses.org> Sender: linux-nfs-owner@vger.kernel.org List-ID: J. Bruce Fields wrote: > On Thu, Jan 22, 2009 at 10:59:49AM -0500, Steve Dickson wrote: > >> J. Bruce Fields wrote: >> >> >> Interesting.... Store something like a reason code (similar to what they have >> in he Kerberos) >> > > Maybe. > > >> in somewhere in the proc file system? >> > > But then I don't know how you'd associate it with a particular mount > attempt. > > > You could do something truly awful like add a new code in the unused bits of the errno value returned from mount. It would confuse an unmodified userspace, but reporting "Unknown Error" isn't much less useful than "I/O Error". -- Greg Banks, P.Engineer, SGI Australian Software Group. the brightly coloured sporks of revolution. I don't speak for SGI.