From mboxrd@z Thu Jan 1 00:00:00 1970 From: Ian Kent Subject: Re: [PATCH 0/7] Permit filesystem local caching and NFS superblock sharing [try #13] Date: Mon, 04 Sep 2006 23:00:57 +0800 Message-ID: <1157382057.4166.0.camel@raven.themaw.net> References: <1157376295.3240.13.camel@raven.themaw.net> <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> <32013.1157377601@warthog.cambridge.redhat.com> Reply-To: Linux filesystem caching discussion list Mime-Version: 1.0 Content-Type: text/plain Content-Transfer-Encoding: 7bit Cc: Andrew Morton , linux-kernel@vger.kernel.org, nfsv4@linux-nfs.org, Trond Myklebust , torvalds@osdl.org, linux-cachefs@redhat.com, linux-fsdevel@vger.kernel.org Return-path: To: David Howells In-Reply-To: <32013.1157377601@warthog.cambridge.redhat.com> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: linux-cachefs-bounces@redhat.com Errors-To: linux-cachefs-bounces@redhat.com List-Id: linux-fsdevel.vger.kernel.org On Mon, 2006-09-04 at 14:46 +0100, David Howells wrote: > Ian Kent wrote: > > > This is the point I'm trying to make. > > I'm able to reproduce this with exports that don't have "nohide". > > The mkdir used to return EEXIST, possibly before getting to the EACCES > > test. It appears to be a change in semantic behavior and I can't see > > where it is coming from. autofs expects an EEXIST but not an EACCES and > > so doesn't perform the mount. I could ignore the EACCES but that would > > be cheating. > > Here's something you can try: Look in fs/nfs/dir.c. Find nfs_lookup(). In > there, find the following lines: > > /* If we're doing an exclusive create, optimize away the lookup */ > if (nfs_is_exclusive_create(dir, nd)) > goto no_entry; > > Comment that bit out and see what the effect it. OK. But tomorrow. I'll let you know. Ian