linux-kernel - Re: [PATCH] scsi: Silence unnecessary warnings about ioctl to partition

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Date:	Wed, 2 May 2012 11:54:47 +0100
From:	Alan Cox <alan@...rguk.ukuu.org.uk>
To:	Paolo Bonzini <pbonzini@...hat.com>
Cc:	Jan Kara <jack@...e.cz>, Jens Axboe <axboe@...nel.dk>,
	LKML <linux-kernel@...r.kernel.org>,
	James Bottomley <JBottomley@...allels.com>,
	linux-scsi@...r.kernel.org
Subject: Re: [PATCH] scsi: Silence unnecessary warnings about ioctl to
 partition

On Wed, 02 May 2012 12:15:10 +0200
Paolo Bonzini <pbonzini@...hat.com> wrote:

> Il 02/05/2012 12:10, Jan Kara ha scritto:
> > Sometimes, warnings about ioctls to partition happen often enough that they
> > form majority of the warnings in the kernel log and users complain. In some
> > cases warnings are about ioctls such as SG_IO so it's not good to get rid of
> > the warnings completely as they can ease debugging of userspace problems
> > when ioctl is refused.
> > 
> > Since I have seen warnings from lots of commands, including some proprietary
> > userspace applications, I don't think disallowing the ioctls for processes
> > with CAP_SYS_RAWIO will happen in the near future if ever. So lets just
> > stop warning for processes with CAP_SYS_RAWIO for which ioctl is allowed.
> 
> NACK.  I would bet that all the warnings you've seen are for ioctl that
> would have failed anyway with ENOTTY.

Then we don't need the bogus warning do we.

Alan
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