Return-Path: Received: from fieldses.org ([174.143.236.118]:49173 "EHLO fieldses.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752841Ab1COVeN (ORCPT ); Tue, 15 Mar 2011 17:34:13 -0400 Date: Tue, 15 Mar 2011 17:34:06 -0400 From: "J. Bruce Fields" To: Chuck Lever Cc: roel , Neil Brown , linux-nfs@vger.kernel.org, Andrew Morton , LKML Subject: Re: [PATCH] SUNRPC: svc_register error overwritten in next iteration Message-ID: <20110315213406.GB2292@fieldses.org> References: <4D7B74C7.7060506@gmail.com> <20110314223645.GL25442@fieldses.org> <13D041DB-A26D-4EC1-A585-7DBA266CF18A@oracle.com> <20110315161301.GA32635@fieldses.org> <20110315165739.GB32635@fieldses.org> Content-Type: text/plain; charset=us-ascii In-Reply-To: <20110315165739.GB32635@fieldses.org> Sender: linux-nfs-owner@vger.kernel.org List-ID: MIME-Version: 1.0 On Tue, Mar 15, 2011 at 12:57:39PM -0400, J. Bruce Fields wrote: > On Tue, Mar 15, 2011 at 12:54:01PM -0400, Chuck Lever wrote: > > > > On Mar 15, 2011, at 12:13 PM, J. Bruce Fields wrote: > > > The current code was failing iff the last registration returns an error. > > > We list the nfs program before the acl program in this list, so nfsd > > > registration was failing iff the acl program failed, which makes no > > > sense whatsoever. > > > > > > I think "all or none" would be cleanest. > > > > > > If people start complaining that they don't want to run rpcbind/portmap > > > then we could give them some way of requesting that instead of just > > > depending on allowing the registration to fail. > > > > I thought vs_hidden was set for NFSACL... but maybe I was wrong about that. > > Oh, I forgot about that. > > But, checking.... Actually, it looks like it's not set for NFSACL--from > a quick grep, it appears that only the callback server sets it. > > > > For cleanup, we can just unregister everything, right? (No harm in > > > possibly unregistering something who's registration just failed?) > > > > Yes. As a simple hard-headed approach, probably you should walk the passed-in sv_program list again and unregister each item in the list. The downside to this is if the upcall is taking a long time (for instance, if networking is not available). It would double the amount of time for svc_register() to return a failure. > > > > However, be prepared: I bet such a change could expose bugs in the NFSD start up stack. > > There are so many to expose. > > > :-( Maybe it deserves some soak-time in linux-next. > > Sure. (Roel Kluin, could you revise and resubmit that? I'd do it in two patches: first just fix the bug you found, but just use a "goto out" or a "return" instead; then fix the lack of cleanup if you can.) --b. > > --b. > -- > To unsubscribe from this list: send the line "unsubscribe linux-nfs" in > the body of a message to majordomo@vger.kernel.org > More majordomo info at http://vger.kernel.org/majordomo-info.html