linux-kernel - Re: recent nfs change causes autofs regression

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Message-ID: <20070831075032.GA13159@citd.de>
Date:	Fri, 31 Aug 2007 09:50:32 +0200
From:	Matthias Schniedermeyer <ms@...d.de>
To:	Trond Myklebust <trond.myklebust@....uio.no>
Cc:	Hua Zhong <hzhong@...il.com>,
	'Linux Kernel Mailing List' <linux-kernel@...r.kernel.org>,
	'Linus Torvalds' <torvalds@...ux-foundation.org>,
	akpm@...ux-foundation.org
Subject: Re: recent nfs change causes autofs regression

> > 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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