> 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
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