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From: Pavel Begunkov <[email protected]>
To: Stefano Garzarella <[email protected]>, Jens Axboe <[email protected]>
Cc: Alexander Viro <[email protected]>,
	Kernel Hardening <[email protected]>,
	Kees Cook <[email protected]>, Aleksa Sarai <[email protected]>,
	Stefan Hajnoczi <[email protected]>,
	Christian Brauner <[email protected]>,
	Sargun Dhillon <[email protected]>, Jann Horn <[email protected]>,
	[email protected], [email protected],
	Jeff Moyer <[email protected]>,
	[email protected]
Subject: Re: [PATCH RFC v2 1/3] io_uring: use an enumeration for io_uring_register(2) opcodes
Date: Thu, 16 Jul 2020 23:16:41 +0300	[thread overview]
Message-ID: <[email protected]> (raw)
In-Reply-To: <[email protected]>

On 16/07/2020 15:48, Stefano Garzarella wrote:
> The enumeration allows us to keep track of the last
> io_uring_register(2) opcode available.
> 
> Behaviour and opcodes names don't change.
> 
> Signed-off-by: Stefano Garzarella <[email protected]>
> ---
>  include/uapi/linux/io_uring.h | 27 ++++++++++++++++-----------
>  1 file changed, 16 insertions(+), 11 deletions(-)
> 
> diff --git a/include/uapi/linux/io_uring.h b/include/uapi/linux/io_uring.h
> index 7843742b8b74..efc50bd0af34 100644
> --- a/include/uapi/linux/io_uring.h
> +++ b/include/uapi/linux/io_uring.h
> @@ -253,17 +253,22 @@ struct io_uring_params {
>  /*
>   * io_uring_register(2) opcodes and arguments
>   */
> -#define IORING_REGISTER_BUFFERS		0
> -#define IORING_UNREGISTER_BUFFERS	1
> -#define IORING_REGISTER_FILES		2
> -#define IORING_UNREGISTER_FILES		3
> -#define IORING_REGISTER_EVENTFD		4
> -#define IORING_UNREGISTER_EVENTFD	5
> -#define IORING_REGISTER_FILES_UPDATE	6
> -#define IORING_REGISTER_EVENTFD_ASYNC	7
> -#define IORING_REGISTER_PROBE		8
> -#define IORING_REGISTER_PERSONALITY	9
> -#define IORING_UNREGISTER_PERSONALITY	10
> +enum {
> +	IORING_REGISTER_BUFFERS,
> +	IORING_UNREGISTER_BUFFERS,
> +	IORING_REGISTER_FILES,
> +	IORING_UNREGISTER_FILES,
> +	IORING_REGISTER_EVENTFD,
> +	IORING_UNREGISTER_EVENTFD,
> +	IORING_REGISTER_FILES_UPDATE,
> +	IORING_REGISTER_EVENTFD_ASYNC,
> +	IORING_REGISTER_PROBE,
> +	IORING_REGISTER_PERSONALITY,
> +	IORING_UNREGISTER_PERSONALITY,
> +
> +	/* this goes last */
> +	IORING_REGISTER_LAST
> +};

It breaks userspace API. E.g.

#ifdef IORING_REGISTER_BUFFERS

>  
>  struct io_uring_files_update {
>  	__u32 offset;
> 

-- 
Pavel Begunkov

  reply	other threads:[~2020-07-16 20:18 UTC|newest]

Thread overview: 17+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-07-16 12:48 [PATCH RFC v2 0/3] io_uring: add restrictions to support untrusted applications and guests Stefano Garzarella
2020-07-16 12:48 ` [PATCH RFC v2 1/3] io_uring: use an enumeration for io_uring_register(2) opcodes Stefano Garzarella
2020-07-16 20:16   ` Pavel Begunkov [this message]
2020-07-16 20:42     ` Jens Axboe
2020-07-16 20:47       ` Pavel Begunkov
2020-07-16 20:51         ` Jens Axboe
2020-07-16 21:20           ` Jens Axboe
2020-07-17  8:13             ` Stefano Garzarella
2020-07-16 12:48 ` [PATCH RFC v2 2/3] io_uring: add IOURING_REGISTER_RESTRICTIONS opcode Stefano Garzarella
2020-07-16 21:26   ` Jens Axboe
2020-07-17  8:55     ` Stefano Garzarella
2020-07-21 10:40     ` Stefano Garzarella
2020-07-21 17:11       ` Jens Axboe
2020-07-22  2:35         ` Daurnimator
2020-07-22 14:14           ` Stefano Garzarella
2020-07-22 14:29         ` Stefano Garzarella
2020-07-16 12:48 ` [PATCH RFC v2 3/3] io_uring: allow disabling rings during the creation Stefano Garzarella

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