Return-Path: Received: from mx1.redhat.com ([209.132.183.28]:47705 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1760812AbZJMSDm (ORCPT ); Tue, 13 Oct 2009 14:03:42 -0400 Date: Tue, 13 Oct 2009 14:03:06 -0400 From: Jeff Layton To: Trond Myklebust Cc: Kevin Coffman , raini@rainiday.com, linux-nfs@vger.kernel.org Subject: Re: [NFS] NFS/krb and batch jobs - doable? Message-ID: <20091013140306.476b20fd@tlielax.poochiereds.net> In-Reply-To: <1255456293.3711.103.camel@heimdal.trondhjem.org> References: <20091009121602.5ec86dfb@tlielax.poochiereds.net> <1c358fde92c49215d84129a1bfe2c6ec.squirrel@webmail.rainiday.com> <20091010090039.4dfd1dfb@tlielax.poochiereds.net> <20091013114441.2882c8b9@tlielax.poochiereds.net> <4d569c330910130851o155050djdfed6a52e1f3177a@mail.gmail.com> <1255452985.3711.85.camel@heimdal.trondhjem.org> <20091013132701.72927b4d@tlielax.poochiereds.net> <1255456293.3711.103.camel@heimdal.trondhjem.org> Content-Type: text/plain; charset=US-ASCII Sender: linux-nfs-owner@vger.kernel.org List-ID: MIME-Version: 1.0 On Tue, 13 Oct 2009 13:51:33 -0400 Trond Myklebust wrote: > On Tue, 2009-10-13 at 13:27 -0400, Jeff Layton wrote: > > Correct...and gssd actually does check the validity of the cache. If > > TGT has expired or it's not valid for some other reason, then it skips > > it and moves on. > > > > The problem comes when you have more than one valid credcache. In that > > case it picks the one with the latest mtime. It seems that it should > > instead pick the one with the latest TGT expiration time. > > So why do you think that is a problem? The result should be that > rpc.gssd always ends up with a valid credential as long as there is at > least one with a valid TGT. > IOW: Who cares if the GSS session isn't going to last as long, as long > as the RPC client can always instantiate a new one. > Hrm...good point. I suppose that as long as gssd can pick a new credcache if the context expires then this patch is superfluous. Wasn't that support only added fairly recently (around a year ago?)? If so, it may just be that raini isn't using a recent enough nfs-utils... -- Jeff Layton