linux-kernel - [RFC PATCH v2 0/4] rust: miscdevice: abstraction for uring-cmd

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Message-ID: <20250727150329.27433-1-sidong.yang@furiosa.ai>
Date: Sun, 27 Jul 2025 15:03:25 +0000
From: Sidong Yang <sidong.yang@...iosa.ai>
To: Caleb Sander Mateos <csander@...estorage.com>,
	Benno Lossin <lossin@...nel.org>
Cc: Miguel Ojeda <ojeda@...nel.org>,
	Arnd Bergmann <arnd@...db.de>,
	Jens Axboe <axboe@...nel.dk>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	rust-for-linux@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	io-uring@...r.kernel.org,
	Sidong Yang <sidong.yang@...iosa.ai>
Subject: [RFC PATCH v2 0/4] rust: miscdevice: abstraction for uring-cmd

This patch series implemens an abstraction for io-uring sqe and cmd and
adds uring_cmd callback for miscdevice. Also there is an example that use
uring_cmd in rust-miscdevice sample.

I received a email from kernel bot that `io_tw_state` is not FFI-safe.
It seems that the struct has no field how can I fix this?

Changelog:
v2:
* use pinned &mut for IoUringCmd
* add missing safety comments
* use write_volatile for read uring_cmd in sample

Sidong Yang (4):
  rust: bindings: add io_uring headers in bindings_helper.h
  rust: io_uring: introduce rust abstraction for io-uring cmd
  rust: miscdevice: add uring_cmd() for MiscDevice trait
  samples: rust: rust_misc_device: add uring_cmd example

 rust/bindings/bindings_helper.h  |   2 +
 rust/kernel/io_uring.rs          | 183 +++++++++++++++++++++++++++++++
 rust/kernel/lib.rs               |   1 +
 rust/kernel/miscdevice.rs        |  41 +++++++
 samples/rust/rust_misc_device.rs |  34 ++++++
 5 files changed, 261 insertions(+)
 create mode 100644 rust/kernel/io_uring.rs

-- 
2.43.0