linux-kernel - [PATCH v2 0/3] Rust block device driver API and null block driver

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Date: Tue, 21 May 2024 16:03:19 +0200
From: Andreas Hindborg <nmi@...aspace.dk>
To: Jens Axboe <axboe@...nel.dk>,
	Christoph Hellwig <hch@....de>,
	Keith Busch <kbusch@...nel.org>,
	Damien Le Moal <dlemoal@...nel.org>,
	Bart Van Assche <bvanassche@....org>,
	Hannes Reinecke <hare@...e.de>,
	Ming Lei <ming.lei@...hat.com>,
	"linux-block@...r.kernel.org" <linux-block@...r.kernel.org>
Cc: Andreas Hindborg <a.hindborg@...sung.com>,
	Greg KH <gregkh@...uxfoundation.org>,
	Matthew Wilcox <willy@...radead.org>,
	Miguel Ojeda <ojeda@...nel.org>,
	Alex Gaynor <alex.gaynor@...il.com>,
	Wedson Almeida Filho <wedsonaf@...il.com>,
	Boqun Feng <boqun.feng@...il.com>,
	Gary Guo <gary@...yguo.net>,
	Björn Roy Baron <bjorn3_gh@...tonmail.com>,
	Benno Lossin <benno.lossin@...ton.me>,
	Alice Ryhl <aliceryhl@...gle.com>,
	Chaitanya Kulkarni <chaitanyak@...dia.com>,
	Luis Chamberlain <mcgrof@...nel.org>,
	Yexuan Yang <1182282462@...t.edu.cn>,
	Sergio González Collado <sergio.collado@...il.com>,
	Joel Granados <j.granados@...sung.com>,
	"Pankaj Raghav (Samsung)" <kernel@...kajraghav.com>,
	Daniel Gomez <da.gomez@...sung.com>,
	Niklas Cassel <Niklas.Cassel@....com>,
	Philipp Stanner <pstanner@...hat.com>,
	Conor Dooley <conor@...nel.org>,
	Johannes Thumshirn <Johannes.Thumshirn@....com>,
	Matias Bjørling <m@...rling.me>,
	open list <linux-kernel@...r.kernel.org>,
	"rust-for-linux@...r.kernel.org" <rust-for-linux@...r.kernel.org>,
	"lsf-pc@...ts.linux-foundation.org" <lsf-pc@...ts.linux-foundation.org>,
	"gost.dev@...sung.com" <gost.dev@...sung.com>
Subject: [PATCH v2 0/3] Rust block device driver API and null block driver

From: Andreas Hindborg <a.hindborg@...sung.com>

Hi All!

Kernel robot found a few issues with the first iteration of this patch [1]. I
also rebased the patch on the Rust PR for 6.10 [2], because we have some changes
to allocation going in, and this patch needs updates for those changes.

This is a resend to correct those issues.

Changes from v1:

- Fix paths in doc comments so they are correct and `rustdoc` does not complain.
- Fix a typo regarding stabilization of `const_refs_to_static`.
- Properly gate `to_blk_status` behind `CONFIG_BLOCK`.
- Update doc comment, a sector is usually 4096 bytes, not 512.
- Update doc comment, use consistent unit names.
- Rebase on `rust-6.10`.

I did not change the interface to use bytes rather than sectors, even though I
like the idea. I think it is preferable to have some similarity to the C API for
now.

Best regards,
Andreas Hindborg

Link: https://lore.kernel.org/all/20240512183950.1982353-1-nmi@metaspace.dk/ [1]
Link: https://lore.kernel.org/all/20240512202215.67763-1-ojeda@kernel.org/ [2]

Andreas Hindborg (3):
  rust: block: introduce `kernel::block::mq` module
  rust: block: add rnull, Rust null_blk implementation
  MAINTAINERS: add entry for Rust block device driver API

 MAINTAINERS                        |  14 ++
 drivers/block/Kconfig              |   9 ++
 drivers/block/Makefile             |   3 +
 drivers/block/rnull.rs             |  86 ++++++++++
 rust/bindings/bindings_helper.h    |   2 +
 rust/helpers.c                     |  16 ++
 rust/kernel/block.rs               |   5 +
 rust/kernel/block/mq.rs            |  99 ++++++++++++
 rust/kernel/block/mq/gen_disk.rs   | 206 ++++++++++++++++++++++++
 rust/kernel/block/mq/operations.rs | 245 +++++++++++++++++++++++++++++
 rust/kernel/block/mq/raw_writer.rs |  55 +++++++
 rust/kernel/block/mq/request.rs    | 227 ++++++++++++++++++++++++++
 rust/kernel/block/mq/tag_set.rs    |  93 +++++++++++
 rust/kernel/error.rs               |   6 +
 rust/kernel/lib.rs                 |   2 +
 15 files changed, 1068 insertions(+)
 create mode 100644 drivers/block/rnull.rs
 create mode 100644 rust/kernel/block.rs
 create mode 100644 rust/kernel/block/mq.rs
 create mode 100644 rust/kernel/block/mq/gen_disk.rs
 create mode 100644 rust/kernel/block/mq/operations.rs
 create mode 100644 rust/kernel/block/mq/raw_writer.rs
 create mode 100644 rust/kernel/block/mq/request.rs
 create mode 100644 rust/kernel/block/mq/tag_set.rs


base-commit: 97ab3e8eec0ce79d9e265e6c9e4c480492180409
-- 
2.44.0