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From: Breno Leitao <leitao@debian.org>
To: Jakub Kicinski <kuba@kernel.org>
Cc: sdf@google.com, axboe@kernel.dk, asml.silence@gmail.com,
	willemdebruijn.kernel@gmail.com, martin.lau@linux.dev,
	krisman@suse.de, bpf@vger.kernel.org,
	linux-kernel@vger.kernel.org, netdev@vger.kernel.org,
	io-uring@vger.kernel.org, pabeni@redhat.com
Subject: Re: [PATCH v4 00/10] io_uring: Initial support for {s,g}etsockopt commands
Date: Fri, 8 Sep 2023 09:55:11 -0700	[thread overview]
Message-ID: <ZPtR7+8YOWmtZHuD@gmail.com> (raw)
In-Reply-To: <20230905154951.0d0d3962@kernel.org>

On Tue, Sep 05, 2023 at 03:49:51PM -0700, Jakub Kicinski wrote:
> On Mon,  4 Sep 2023 09:24:53 -0700 Breno Leitao wrote:
> > Patches 1-2: Modify the BPF hooks to support sockptr_t, so, these functions
> > become flexible enough to accept user or kernel pointers for optval/optlen.
> 
> Have you seen:
> 
> https://lore.kernel.org/all/CAHk-=wgGV61xrG=gO0=dXH64o2TDWWrXn1mx-CX885JZ7h84Og@mail.gmail.com/

I haven't but I think it will not affect *much* this patchset.

> ? I wasn't aware that Linus felt this way, now I wonder if having
> sockptr_t spread will raise any red flags as this code flows back
> to him.

I can change the io_uring API in a way that we can avoid these
sockptr_t changes completely.

My plan is to mimic what getsockopt(2) is doing in io_uring cmd path, in
regard to optlen being an userpointer, instead of a value - which is
then translated to a KERNEL_SOCKPTR.

In this way, this change don't need to touch any sockptr field.

Thanks for the heads-up

  reply	other threads:[~2023-09-08 16:55 UTC|newest]

Thread overview: 23+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2023-09-04 16:24 [PATCH v4 00/10] io_uring: Initial support for {s,g}etsockopt commands Breno Leitao
2023-09-04 16:24 ` [PATCH v4 01/10] bpf: Leverage sockptr_t in BPF getsockopt hook Breno Leitao
2023-09-04 16:24 ` [PATCH v4 02/10] bpf: Leverage sockptr_t in BPF setsockopt hook Breno Leitao
2023-09-04 16:24 ` [PATCH v4 03/10] net/socket: Break down __sys_setsockopt Breno Leitao
2023-09-04 16:24 ` [PATCH v4 04/10] net/socket: Break down __sys_getsockopt Breno Leitao
2023-09-05  9:36   ` David Laight
2023-09-05 10:29   ` Andy Shevchenko
2023-09-04 16:24 ` [PATCH v4 05/10] io_uring/cmd: Pass compat mode in issue_flags Breno Leitao
2023-09-04 16:24 ` [PATCH v4 06/10] selftests/net: Extract uring helpers to be reusable Breno Leitao
2023-09-04 16:25 ` [PATCH v4 07/10] io_uring/cmd: return -EOPNOTSUPP if net is disabled Breno Leitao
2023-09-05 12:32   ` Gabriel Krisman Bertazi
2023-09-08 17:04     ` Breno Leitao
2023-09-04 16:25 ` [PATCH v4 08/10] io_uring/cmd: Introduce SOCKET_URING_OP_GETSOCKOPT Breno Leitao
2023-09-05 12:24   ` Gabriel Krisman Bertazi
2023-09-04 16:25 ` [PATCH v4 09/10] io_uring/cmd: Introduce SOCKET_URING_OP_SETSOCKOPT Breno Leitao
2023-09-05 12:24   ` Gabriel Krisman Bertazi
2023-09-04 16:25 ` [PATCH v4 10/10] selftests/bpf/sockopt: Add io_uring support Breno Leitao
2023-09-05 22:49 ` [PATCH v4 00/10] io_uring: Initial support for {s,g}etsockopt commands Jakub Kicinski
2023-09-08 16:55   ` Breno Leitao [this message]
2023-10-06 15:45   ` Breno Leitao
2023-10-09 10:11     ` Willem de Bruijn
2023-10-09 13:28       ` Breno Leitao
2023-10-09 16:55         ` Jakub Kicinski

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