linux-kernel - Re: setting up CDB filters in udev (was Re: [PATCH v2 0/3] block: add queue-private command filter, editable via sysfs)

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Message-ID: <20121105201512.GB26735@htj.dyndns.org>
Date:	Mon, 5 Nov 2012 12:15:12 -0800
From:	Tejun Heo <tj@...nel.org>
To:	Alan Cox <alan@...rguk.ukuu.org.uk>
Cc:	Paolo Bonzini <pbonzini@...hat.com>,
	Ric Wheeler <rwheeler@...hat.com>,
	Petr Matousek <pmatouse@...hat.com>,
	Kay Sievers <kay@...hat.com>, Jens Axboe <axboe@...nel.dk>,
	linux-kernel@...r.kernel.org,
	"James E.J. Bottomley" <James.Bottomley@...senPartnership.com>
Subject: Re: setting up CDB filters in udev (was Re: [PATCH v2 0/3] block:
 add queue-private command filter, editable via sysfs)

On Mon, Nov 05, 2012 at 08:17:54PM +0000, Alan Cox wrote:
> IMHO that's the best option for now - if it fixes the specific case of
> concern right now. It's a trivial interface, it's trivial security (need
> to check CAP_SYS_RAWIO to flip) and it means that the job can be done
> properly when there is consensus without a whole extra legacy API stuck
> behind.

Oh yeah, fully agreed.  We could just set the sysfs file only
writeable by root (basically just setting perm to 0644).  Would the
CAP_SYS_RAWIO distinction matter?

Thanks.

-- 
tejun
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