Date: Tue, 27 Jun 2006 16:38:23 -0400 From: Garance A Drosehn <gad@FreeBSD.org> To: "Poul-Henning Kamp" <phk@phk.freebsd.dk>, "M. Warner Losh" <imp@bsdimp.com> Cc: pjd@FreeBSD.org, freebsd-arch@FreeBSD.org Subject: Re: Accessing disks via their serial numbers. Message-ID: <p06230900c0c744338e3e@[128.113.24.47]> In-Reply-To: <62426.1151433799@critter.freebsd.dk> References: <62426.1151433799@critter.freebsd.dk>
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At 6:43 PM +0000 6/27/06, Poul-Henning Kamp wrote:
>
>I don't think we should allow names that are not "under
>control", and by not "under control" I mean device names
>which the device driver writer doesn't control or at the
>very least sanitize.
>
>For instance, if you want to create names that match random
>strings, like the tape labels in your robot, the sensible
>and security concious device driver writer makes sure the
>names have a unique prefix:
>
> /dev/tape/$label
>
>or similar, so that devfs(8) rules can be written in a
>surefire way.
This strikes me as a worthwhile idea. Leave the device-
entries in /dev as they are now, but then create some
sub-directories which would hold the more arbitrary (or
"non-sanitized") names.
/dev/info/disk/serial-num
or /dev/info/geom/whatever
etc. That way there's only one new entry in /dev, and
people could just de-permit that directory (or turn the
feature off) if they didn't want or need to have that
extra info available.
--
Garance Alistair Drosehn = drosehn@rpi.edu
Senior Systems Programmer or gad@FreeBSD.org
Rensselaer Polytechnic Institute; Troy, NY; USA
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