On Thu, Mar 16, 2023 at 05:41:55AM -0700, Yi Liu wrote:
> This extends both vfio_file_is_valid() and vfio_file_has_dev() to accept
> device file from the vfio PCI hot reset.
>
> Signed-off-by: Yi Liu <yi.l.liu@xxxxxxxxx>
> ---
> drivers/vfio/vfio_main.c | 23 +++++++++++++++++++----
> 1 file changed, 19 insertions(+), 4 deletions(-)
>
> diff --git a/drivers/vfio/vfio_main.c b/drivers/vfio/vfio_main.c
> index fe7446805afd..ebbb6b91a498 100644
> --- a/drivers/vfio/vfio_main.c
> +++ b/drivers/vfio/vfio_main.c
> @@ -1154,13 +1154,23 @@ const struct file_operations vfio_device_fops = {
> .mmap = vfio_device_fops_mmap,
> };
>
> +static struct vfio_device *vfio_device_from_file(struct file *file)
> +{
> + struct vfio_device *device = file->private_data;
Isn't this a df now?
> + if (file->f_op != &vfio_device_fops)
> + return NULL;
> + return device;
> +}
The device has to be bound to be a security proof.
Jason
