Re: Linux can use a mountpoint for 2 Filesystems

[H. Peter Anvin]

Followup to:  <[e-mail]>
By author:    Andre Hedrick <[e-mail]>
In newsgroup: linux.dev.kernel
> 
> Greetings Gernot,
> 
> You can do this with all real and virtual spindles under Linux.
> The reality is total crap that it can happen, but what the hey ...
> No policies in UNIX, ROOT beware.
> 
> Sorry, but this report saddens me, issues like these are permitted
> There are no kernel controls to prevent multi mounting to the same point.
> 

There are real reasons to overmount a filesystem.  It's getting to be
a usability problem, probably because Linux (UNLIKE MOST OTHER UNIXES)
didn't allow it until just recently.  This change caused some
problems, including with the automount daemon.  I would like to see an
option to mount(8) to allow it, by default disallow by policy.

	-hpa

-- 
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http://www.zytor.com/~hpa/puzzle.txt	<[e-mail]>