linux-kernel - Re: [PATCH] io_uring: Add io_uring command support for sockets

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Message-ID: <20230622103948.33cbb0dd@kernel.org>
Date:   Thu, 22 Jun 2023 10:39:48 -0700
From:   Jakub Kicinski <kuba@...nel.org>
To:     Breno Leitao <leitao@...ian.org>
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Jonathan Corbet <corbet@....net>, Jens Axboe <axboe@...nel.dk>,
        Pavel Begunkov <asml.silence@...il.com>,
        "David S. Miller" <davem@...emloft.net>,
        Eric Dumazet <edumazet@...gle.com>,
        Paolo Abeni <pabeni@...hat.com>, leit@...a.com,
        Arnd Bergmann <arnd@...db.de>,
        Steve French <stfrench@...rosoft.com>,
        Lu Baolu <baolu.lu@...ux.intel.com>,
        Jiri Slaby <jirislaby@...nel.org>,
        Stephen Hemminger <stephen@...workplumber.org>,
        Jason Gunthorpe <jgg@...pe.ca>,
        Simon Ser <contact@...rsion.fr>,
        "open list:DOCUMENTATION" <linux-doc@...r.kernel.org>,
        open list <linux-kernel@...r.kernel.org>,
        "open list:IO_URING" <io-uring@...r.kernel.org>,
        "open list:NETWORKING [GENERAL]" <netdev@...r.kernel.org>
Subject: Re: [PATCH] io_uring: Add io_uring command support for sockets

On Thu, 22 Jun 2023 19:03:04 +0200 Greg Kroah-Hartman wrote:
> > Correct. For now we are just using 0xa0 and 0xa1, and eventually we
> > might need more ioctls numbers.
> > 
> > I got these numbers finding a unused block and having some room for
> > expansion, as suggested by Documentation/userspace-api/ioctl/ioctl-number.rst,
> > that says:
> > 
> > 	If you are writing a driver for a new device and need a letter, pick an
> > 	unused block with enough room for expansion: 32 to 256 ioctl commands.  
> 
> So is this the first io_uring ioctl?  If so, why is this an ioctl and
> not just a "normal" io_uring call?

+1, the mixing with classic ioctl seems confusing and I'm not sure 
if it buys us anything.
-- 
pw-bot: cr