[LibreQoS] Fwd: [PATCH v2 0/5] Rust abstractions for network device drivers

Dave Taht dave.taht at gmail.com
Tue Jul 11 09:28:59 EDT 2023

I have often thought that the best way to implement a multi-core
capable cake was to bypass bql, qdisc, and ethernet driver entirely,
writing something like the carousel virtualized driver described here:

---------- Forwarded message ---------
From: FUJITA Tomonori <fujita.tomonori at gmail.com>
Date: Mon, Jul 10, 2023 at 1:39 AM
Subject: [PATCH v2 0/5] Rust abstractions for network device drivers
To: <rust-for-linux at vger.kernel.org>, <netdev at vger.kernel.org>
Cc: <kuba at kernel.org>, <andrew at lunn.ch>, <aliceryhl at google.com>,
<miguel.ojeda.sandonis at gmail.com>, <benno.lossin at proton.me>

This patchset adds minimum Rust abstractions for network device
drivers and an example of a Rust network device driver, a simpler
version of drivers/net/dummy.c.

The major change is a way to drop an skb (1/5 patch); a driver needs
to explicitly call a function to drop a skb. The code to let a skb
go out of scope can't be compiled.

I dropped get_stats64 support patch that the current sample driver
doesn't use. Instead I added a patch to update the NETWORKING DRIVERS

Changes since v1 [1]:
- a driver must explicitly call a function to drop a skb.
- simplify the code (thanks to Benno Lossin).
- update MAINTAINERS file.

[1] https://lwn.net/ml/netdev/20230613045326.3938283-1-fujita.tomonori@gmail.com/

FUJITA Tomonori (5):
  rust: core abstractions for network device drivers
  rust: add support for ethernet operations
  rust: add methods for configure net_device
  samples: rust: add dummy network driver
  MAINTAINERS: add Rust network abstractions files to the NETWORKING
    DRIVERS entry

 MAINTAINERS                     |   2 +
 rust/bindings/bindings_helper.h |   3 +
 rust/helpers.c                  |  23 ++
 rust/kernel/lib.rs              |   3 +
 rust/kernel/net.rs              |   5 +
 rust/kernel/net/dev.rs          | 598 ++++++++++++++++++++++++++++++++
 samples/rust/Kconfig            |  13 +
 samples/rust/Makefile           |   1 +
 samples/rust/rust_net_dummy.rs  |  75 ++++
 scripts/Makefile.build          |   2 +-
 10 files changed, 724 insertions(+), 1 deletion(-)
 create mode 100644 rust/kernel/net.rs
 create mode 100644 rust/kernel/net/dev.rs
 create mode 100644 samples/rust/rust_net_dummy.rs

base-commit: d2e3115d717197cb2bc020dd1f06b06538474ac3

Podcast: https://www.linkedin.com/feed/update/urn:li:activity:7058793910227111937/
Dave Täht CSO, LibreQos

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