From: Kees Cook <keescook@chromium.org>
To: Stefano Garzarella <sgarzare@redhat.com>
Cc: Jens Axboe <axboe@kernel.dk>,
Christian Brauner <christian.brauner@ubuntu.com>,
Jann Horn <jannh@google.com>, Jeff Moyer <jmoyer@redhat.com>,
linux-fsdevel@vger.kernel.org, Sargun Dhillon <sargun@sargun.me>,
Alexander Viro <viro@zeniv.linux.org.uk>,
Kernel Hardening <kernel-hardening@lists.openwall.com>,
Stefan Hajnoczi <stefanha@redhat.com>,
linux-kernel@vger.kernel.org, Aleksa Sarai <asarai@suse.de>,
io-uring@vger.kernel.org
Subject: Re: [PATCH v4 3/3] io_uring: allow disabling rings during the creation
Date: Wed, 26 Aug 2020 12:50:31 -0700 [thread overview]
Message-ID: <202008261248.BB37204250@keescook> (raw)
In-Reply-To: <20200813153254.93731-4-sgarzare@redhat.com>
On Thu, Aug 13, 2020 at 05:32:54PM +0200, Stefano Garzarella wrote:
> This patch adds a new IORING_SETUP_R_DISABLED flag to start the
> rings disabled, allowing the user to register restrictions,
> buffers, files, before to start processing SQEs.
>
> When IORING_SETUP_R_DISABLED is set, SQE are not processed and
> SQPOLL kthread is not started.
>
> The restrictions registration are allowed only when the rings
> are disable to prevent concurrency issue while processing SQEs.
>
> The rings can be enabled using IORING_REGISTER_ENABLE_RINGS
> opcode with io_uring_register(2).
>
> Suggested-by: Jens Axboe <axboe@kernel.dk>
> Signed-off-by: Stefano Garzarella <sgarzare@redhat.com>
Reviewed-by: Kees Cook <keescook@chromium.org>
Where can I find the io_uring selftests? I'd expect an additional set of
patches to implement the selftests for this new feature.
--
Kees Cook
next prev parent reply other threads:[~2020-08-26 19:50 UTC|newest]
Thread overview: 17+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-08-13 15:32 [PATCH v4 0/3] io_uring: add restrictions to support untrusted applications and guests Stefano Garzarella
2020-08-13 15:32 ` [PATCH v4 1/3] io_uring: use an enumeration for io_uring_register(2) opcodes Stefano Garzarella
2020-08-26 19:40 ` Kees Cook
2020-08-26 19:43 ` Kees Cook
2020-08-26 19:52 ` Andreas Dilger
2020-08-27 7:11 ` Stefano Garzarella
2020-08-13 15:32 ` [PATCH v4 2/3] io_uring: add IOURING_REGISTER_RESTRICTIONS opcode Stefano Garzarella
2020-08-26 19:46 ` Kees Cook
2020-08-27 7:12 ` Stefano Garzarella
2020-08-13 15:32 ` [PATCH v4 3/3] io_uring: allow disabling rings during the creation Stefano Garzarella
2020-08-26 19:50 ` Kees Cook [this message]
2020-08-27 7:18 ` Stefano Garzarella
2020-08-27 15:04 ` Kees Cook
2020-08-25 15:20 ` [PATCH v4 0/3] io_uring: add restrictions to support untrusted applications and guests Stefano Garzarella
2020-08-26 16:47 ` Jens Axboe
2020-08-26 19:40 ` Kees Cook
2020-08-27 7:24 ` Stefano Garzarella
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