From: Theodore Tso <tytso@mit.edu>
To: Andreas Dilger <adilger@sun.com>
Cc: Florian Weimer <fw@deneb.enyo.de>, linux-fsdevel@vger.kernel.org
Subject: Re: FIBMAP/FIEMAP discrepancy for CAP_SYS_RAWIO
Date: Mon, 7 Sep 2009 09:28:48 -0400 [thread overview]
Message-ID: <20090907132848.GA22901@mit.edu> (raw)
In-Reply-To: <20090907105014.GV4197@webber.adilger.int>
On Mon, Sep 07, 2009 at 12:50:14PM +0200, Andreas Dilger wrote:
> On Sep 06, 2009 13:39 +0000, Florian Weimer wrote:
> > The FIBMAP ioctl requires CAP_SYS_RAWIO, but FIEMAP doesn't. Why's
> > that? Is it that there is no backwards-compatible way to introduce
> > locking on the bmap path?
>
> I'm not sure why there is a root-only requirement for FIBMAP
Historical reasons, I suspect --- back then only LILO needed it, and
whoever added it decided it was safer only to allow root to have
access to it. I don't think there's any good justification for FIBMAP
to require privileges.
- Ted
next prev parent reply other threads:[~2009-09-07 13:28 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-09-06 13:39 FIBMAP/FIEMAP discrepancy for CAP_SYS_RAWIO Florian Weimer
2009-09-07 10:50 ` Andreas Dilger
2009-09-07 13:28 ` Theodore Tso [this message]
2009-09-07 16:26 ` Florian Weimer
2009-09-08 7:23 ` Andreas Dilger
2009-09-08 8:47 ` Jamie Lokier
2009-09-09 16:13 ` Andreas Dilger
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