From mboxrd@z Thu Jan  1 00:00:00 1970
From: Trond Myklebust <trond.myklebust@fys.uio.no>
Subject: Re: [PATCH 0/7] Permit filesystem local caching and NFS superblock
	sharing [try #13]
Date: Tue, 05 Sep 2006 08:52:57 -0400
Message-ID: <1157460777.5621.8.camel@localhost>
References: <20060901195009.187af603.akpm@osdl.org>
	 <20060831102127.8fb9a24b.akpm@osdl.org>
	 <20060830135503.98f57ff3.akpm@osdl.org>
	 <20060830125239.6504d71a.akpm@osdl.org>
	 <20060830193153.12446.24095.stgit@warthog.cambridge.redhat.com>
	 <27414.1156970238@warthog.cambridge.redhat.com>
	 <9849.1157018310@warthog.cambridge.redhat.com>
	 <9534.1157116114@warthog.cambridge.redhat.com>
	 <20060901093451.87aa486d.akpm@osdl.org>
	 <1157130044.5632.87.camel@localhost>
	 <28945.1157370732@warthog.cambridge.redhat.com>
	 <1157376295.3240.13.camel@raven.themaw.net>
	 <1157421445.5510.13.camel@localhost>
	 <1157424937.3002.4.camel@raven.themaw.net>
	 <1157428241.5510.72.camel@localhost>
	 <1157429030.3915.8.camel@raven.themaw.net>
	 <1157432039.32412.37.camel@localhost>
	 <1157436412.3915.26.camel@raven.themaw.net>
	 <1157439691.4133.12.camel@raven.themaw.net>
Mime-Version: 1.0
Content-Type: text/plain
Content-Transfer-Encoding: 7bit
Cc: David Howells <dhowells@redhat.com>, Andrew Morton <akpm@osdl.org>,
	torvalds@osdl.org, steved@redhat.com,
	linux-fsdevel@vger.kernel.org, linux-cachefs@redhat.com,
	nfsv4@linux-nfs.org, linux-kernel@vger.kernel.org
Return-path: <linux-fsdevel-owner@vger.kernel.org>
Received: from pat.uio.no ([129.240.10.4]:17558 "EHLO pat.uio.no")
	by vger.kernel.org with ESMTP id S932127AbWIEMxQ (ORCPT
	<rfc822;linux-fsdevel@vger.kernel.org>);
	Tue, 5 Sep 2006 08:53:16 -0400
To: Ian Kent <raven@themaw.net>
In-Reply-To: <1157439691.4133.12.camel@raven.themaw.net>
Sender: linux-fsdevel-owner@vger.kernel.org
List-Id: linux-fsdevel.vger.kernel.org

On Tue, 2006-09-05 at 15:01 +0800, Ian Kent wrote:

> > autofs v4 doesn't rely on mkdir never returning EACCESS just that it
> > return EEXIST if the directory exists. Never the less if the behavior of
> > stat will work in this case I'll change v4 to do it the way you suggest
> > (as v5 does already). 
> 
> Aaah. Wrong again!
> 
> Although v5 doesn't attempt to mount an NFS export if the directory
> doesn't exist it does end up doing a mkdir later as the most common case
> is mounting an NFS export within an autofs filesystem or other, usually
> local filesystem.

Then make sure that it only does this within the autofs filesystem. The
value of f_type as returned by statfs() should be able to tell you if
this is the case.