linux-kernel - Re: [PATCH v2 8/8] vfio: do not set FMODE

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Date:   Mon, 27 Jun 2022 14:07:35 -0600
From:   Alex Williamson <alex.williamson@...hat.com>
To:     "Jason A. Donenfeld" <Jason@...c4.com>
Cc:     linux-kernel@...r.kernel.org, viro@...iv.linux.org.uk,
        Jens Axboe <axboe@...nel.dk>, linux-fsdevel@...r.kernel.org,
        Cornelia Huck <cohuck@...hat.com>, kvm@...r.kernel.org
Subject: Re: [PATCH v2 8/8] vfio: do not set FMODE_LSEEK flag

On Sat, 25 Jun 2022 13:01:15 +0200
"Jason A. Donenfeld" <Jason@...c4.com> wrote:

> This file does not support llseek, so don't set the flag advertising it.
> 
> Cc: Alex Williamson <alex.williamson@...hat.com>
> Cc: Cornelia Huck <cohuck@...hat.com>
> Cc: kvm@...r.kernel.org
> Signed-off-by: Jason A. Donenfeld <Jason@...c4.com>
> ---
>  drivers/vfio/vfio.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/drivers/vfio/vfio.c b/drivers/vfio/vfio.c
> index 61e71c1154be..d194dda89542 100644
> --- a/drivers/vfio/vfio.c
> +++ b/drivers/vfio/vfio.c
> @@ -1129,7 +1129,7 @@ static struct file *vfio_device_open(struct vfio_device *device)
>  	 * Appears to be missing by lack of need rather than
>  	 * explicitly prevented.  Now there's need.
>  	 */
> -	filep->f_mode |= (FMODE_LSEEK | FMODE_PREAD | FMODE_PWRITE);
> +	filep->f_mode |= (FMODE_PREAD | FMODE_PWRITE);
>  
>  	if (device->group->type == VFIO_NO_IOMMU)
>  		dev_warn(device->dev, "vfio-noiommu device opened by user "

Acked-by: Alex Williamson <alex.williamson@...hat.com>