Re: mount namespace : who mounted what ?

From: Al Viro
Date: Fri Jun 04 2010 - 00:02:16 EST


On Thu, Jun 03, 2010 at 10:04:13PM +0200, Daniel Lezcano wrote:
> Hi all,
>
> I was wondering, in a new mount namespace, if it is possible to know
> which mount points were inherited and which were mounted in a new
> namespace ?
>
> I looked at /proc/<pid>/mountinfo and investigated a bit on the
> mount id, but this one is not reliable as it changes in the new
> namespace. The /proc/<pid>/mounts file shows all the mount points
> visible for the process inherited or not.

No more than "had it been this process that mmaped that area or was it
inherited from the parent?"
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