linux-kernel - [RFC PATCH v3 0/5] rust: miscdevice: abstraction for uring

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [thread-next>] [day] [month] [year] [list]

Message-ID: <20250822125555.8620-1-sidong.yang@furiosa.ai>
Date: Fri, 22 Aug 2025 12:55:50 +0000
From: Sidong Yang <sidong.yang@...iosa.ai>
To: Jens Axboe <axboe@...nel.dk>,
	Daniel Almeida <daniel.almeida@...labora.com>,
	Caleb Sander Mateos <csander@...estorage.com>,
	Benno Lossin <lossin@...nel.org>
Cc: Miguel Ojeda <ojeda@...nel.org>,
	Arnd Bergmann <arnd@...db.de>,
	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 v3 0/5] rust: miscdevice: abstraction for uring_cmd

This patch series implements the groundwork for using io-uring cmd
interface in rust miscdevice.

 1. Io-uring headers for bindings
    We needs additional headers for implementing rust abstraction.

 2. zero-init pdu in io_uring_cmd
    We need to initialize pdu for avoiding UB when reading pdu in rust.

 3. Core abstractions
    Provides 2 core struct for abstraction. One is for io_uring_cmd and
    another is for io_uring_sqe.

 4. Method for MiscDevice
    MiscDevice has some method for `file_operations`. This patch adds a
    method `uring_cmd` which could be used in miscdevice driver.

 5. uring_cmd interface for MiscDevice sample
    Added sample code for using new interface for `MiscDevice::uring_cmd()`

Together, these 5 patches.

 - io-uring headers for bindings
 - zero-init pdu in io_uring_cmd
 - abstraction types for io-uring interface
 - add uring_cmd method for miscdevice
 - sample that implements uring_cmd method

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

v3:
* fixes various comments including safety related ones.
* zero-init pdu in io_uring_cmd
* use `read_pdu`/`write_pdu` with `AsBytes`/`FromBytes` for pdu
* `IoUringSqe::cmd_data` checkes opcode and returns `FromBytes`
* use `_IOR`/`_IOW` macros for cmd_op in sample

Sidong Yang (5):
  rust: bindings: add io_uring headers in bindings_helper.h
  io_uring/cmd: zero-init pdu in io_uring_cmd_prep() to avoid UB
  rust: io_uring: introduce rust abstraction for io-uring cmd
  rust: miscdevice: Add `uring_cmd` support
  samples: rust: Add `uring_cmd` example to `rust_misc_device`

 io_uring/uring_cmd.c             |   1 +
 rust/bindings/bindings_helper.h  |   2 +
 rust/kernel/io_uring.rs          | 306 +++++++++++++++++++++++++++++++
 rust/kernel/lib.rs               |   1 +
 rust/kernel/miscdevice.rs        |  53 +++++-
 samples/rust/rust_misc_device.rs |  27 +++
 6 files changed, 389 insertions(+), 1 deletion(-)
 create mode 100644 rust/kernel/io_uring.rs

-- 
2.43.0