Re: Linux can use a mountpoint for 2 Filesystems

[H. Peter Anvin]

[e-mail] wrote:

> hpa:
> 
> 
>>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.
>>
> 
> mount(8) does not necessarily have such information:
> /etc/mtab is just a random file with random contents,
> and /proc/mounts need not exist.
> 
> The cleanest way to do what you suggest would be to make the kernel
> refuse an overmount unless the mount(2) flags included the
> "overmount" flag.
> 

Agreed.

	-hpa