Re: [PATCH v6 2/3] io_uring: add IOURING_REGISTER_RESTRICTIONS opcode

[Stefano Garzarella]

On Mon, Jan 04, 2021 at 01:26:41AM +1100, Daurnimator wrote:
> On Fri, 28 Aug 2020 at 00:59, Stefano Garzarella <sgarzare@xxxxxxxxxx> wrote:
> > +               __u8 register_op; /* IORING_RESTRICTION_REGISTER_OP */
>
> Can you confirm that this intentionally limited the future range of
> IORING_REGISTER opcodes to 0-255?

It was based on io_uring_probe, so we used u8 for opcodes, but we have 
room to extend it in the future.

So, for now, this allow to register restrictions up to 255 
IORING_REGISTER opcode.