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Subject: Re: [PATCH 0/7] Permit filesystem local caching and NFS superblock
	sharing [try #13]
From: Ian Kent <raven@themaw.net>
To: Trond Myklebust <trond.myklebust@fys.uio.no>
Cc: David Howells <dhowells@redhat.com>, Andrew Morton <akpm@osdl.org>,
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Date: Wed, 06 Sep 2006 12:54:01 +0800
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On Tue, 2006-09-05 at 08:52 -0400, Trond Myklebust wrote:
> 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.
> 

Yep. I've done that elsewhere.

Ian