Date: Fri, 31 Aug 2007 09:50:32 +0200
From: Matthias Schniedermeyer <ms@citd.de>
To: Trond Myklebust <trond.myklebust@fys.uio.no>
Cc: Hua Zhong <hzhong@gmail.com>,
       "'Linux Kernel Mailing List'" <linux-kernel@vger.kernel.org>,
       "'Linus Torvalds'" <torvalds@linux-foundation.org>,
       akpm@linux-foundation.org
Subject: Re: recent nfs change causes autofs regression
Message-ID: <20070831075032.GA13159@citd.de>
References: <000701c7eb49$cff701c0$6fe50540$@com> <1188513433.6626.24.camel@heimdal.trondhjem.org> <001001c7eb57$afd2d320$0f787960$@com> <1188516173.6626.46.camel@heimdal.trondhjem.org> <001501c7eb5d$d295d870$77c18950$@com> <1188517070.6626.54.camel@heimdal.trondhjem.org> <001601c7eb5f$b6146980$223d3c80$@com> <1188534682.6626.70.camel@heimdal.trondhjem.org>
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> > It's not very conservative to suddenly change default behavior and break
> > autofs mounts. There is not even one kernel message that "_tells_ user why
> > it thinks it's wrong". It just silently fails.
> 
> No it doesn't. It reports an error code to the caller. If autofs is
> failing silently, then that is a bug in autofs: mount will report the
> error to the user.

Wrong(tm).

autofs AND mounting at the commandline just say:
mount.nfs: /mnt is already mounted or busy

Which has an actual information value of about 1%.

In my case i moved a nfs exported directory inside another nfs-exported 
directory month ago and placed a symlink where the direcotry was (on the 
server-side). It never acured to me that that was "wrong"(tm).

Now i can only mount one of the two mounts and the other just tells 
"busy".

After reading this i could fix my case easyly. I just erased the 
"deeper" mount and symlinked the directory from the other mount.

But YOU HAVE TO KNOW THAT YOU DID SOMETHING WRONG. Just getting a "Busy" 
lets you staying with Question-marks flying around you head!


Bis denn

-- 
Real Programmers consider "what you see is what you get" to be just as 
bad a concept in Text Editors as it is in women. No, the Real Programmer
wants a "you asked for it, you got it" text editor -- complicated, 
cryptic, powerful, unforgiving, dangerous.

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