linux-kernel - "mount --bind" with user/group/mode definition?

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Message-Id: <200710111035.38644.philipp.marek@bmlv.gv.at>
Date:	Thu, 11 Oct 2007 10:35:37 +0200
From:	"Ph. Marek" <philipp.marek@...v.gv.at>
To:	linux-kernel@...r.kernel.org
Subject: "mount --bind" with user/group/mode definition?

Hello everybody,

is there some way to duplicate a directory somewhere else (like 
with "mount --bind"), but having different owner/group/mode bits?

I'd like to mount a directory I have no control over (think NFS, or 
floppy, ...) with clearly defined rights - like root:<some group>, mode 0550 
for all directories, and 0440 for all files.
(Here I want to have full *read* control, regardless of the original 
permissions).
[ I know that this special case can be (mostly) done by a read-only binding
  mount; the part that is missing is eg. files with a different owner being
  0700. ]

I know that something like this is possible for eg. VFAT, which has no right 
descriptors for itself; but I'd need that for arbitrary directory trees, who 
themselves *have* permissions set.

Is there some way to achieve that?

Regards,

Phil
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