From mboxrd@z Thu Jan  1 00:00:00 1970
From: "Michael S. Tsirkin" <mst@redhat.com>
Subject: Re: [PATCH 15/24] compat_ioctl: scsi: move ioctl handling into drivers
Date: Wed, 11 Dec 2019 18:05:07 -0500
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 <20191211204306.1207817-16-arnd@arndb.de>
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To: Arnd Bergmann <arnd@arndb.de>
Cc: Jens Axboe <axboe@kernel.dk>, Hannes Reinecke <hare@suse.com>, Bart Van Assche <bvanassche@acm.org>, "Martin K. Petersen" <martin.petersen@oracle.com>, y2038@lists.linaro.org, Damien Le Moal <damien.lemoal@wdc.com>, "James E.J. Bottomley" <jejb@linux.ibm.com>, John Garry <john.garry@huawei.com>, linux-kernel@vger.kernel.org, Kai =?iso-8859-1?Q?M=E4kisara?= <Kai.Makisara@kolumbus.fi>, linux-block@vger.kernel.org, Alexander Viro <viro@zeniv.linux.org.uk>, Stefan Hajnoczi <stefanha@redhat.com>, Doug Gilbert <dgilbert@interlog.com>, linux-fsdevel@vger.kernel.org, Paolo Bonzini <pbonzini@redhat.com>, virtualization@lists.linux-foundation.org, linux-scsi@vger.kernel.org
List-Id: virtualization@lists.linuxfoundation.org

On Wed, Dec 11, 2019 at 09:42:49PM +0100, Arnd Bergmann wrote:
> Each driver calling scsi_ioctl() gets an equivalent compat_ioctl()
> handler that implements the same commands by calling scsi_compat_ioctl().
> 
> The scsi_cmd_ioctl() and scsi_cmd_blk_ioctl() functions are compatible
> at this point, so any driver that calls those can do so for both native
> and compat mode, with the argument passed through compat_ptr().
> 
> With this, we can remove the entries from fs/compat_ioctl.c.  The new
> code is larger, but should be easier to maintain and keep updated with
> newly added commands.
> 
> Signed-off-by: Arnd Bergmann <arnd@arndb.de>
> ---
>  drivers/block/virtio_blk.c |   3 +
>  drivers/scsi/ch.c          |   9 ++-
>  drivers/scsi/sd.c          |  50 ++++++--------
>  drivers/scsi/sg.c          |  44 ++++++++-----
>  drivers/scsi/sr.c          |  57 ++++++++++++++--
>  drivers/scsi/st.c          |  51 ++++++++------
>  fs/compat_ioctl.c          | 132 +------------------------------------
>  7 files changed, 142 insertions(+), 204 deletions(-)
> 
> diff --git a/drivers/block/virtio_blk.c b/drivers/block/virtio_blk.c
> index 7ffd719d89de..fbbf18ac1d5d 100644
> --- a/drivers/block/virtio_blk.c
> +++ b/drivers/block/virtio_blk.c
> @@ -405,6 +405,9 @@ static int virtblk_getgeo(struct block_device *bd, struct hd_geometry *geo)
>  
>  static const struct block_device_operations virtblk_fops = {
>  	.ioctl  = virtblk_ioctl,
> +#ifdef CONFIG_COMPAT
> +	.compat_ioctl = blkdev_compat_ptr_ioctl,
> +#endif
>  	.owner  = THIS_MODULE,
>  	.getgeo = virtblk_getgeo,
>  };

Hmm - is virtio blk lumped in with scsi things intentionally?

-- 
MST