linux-kernel - [PATCH WIP 0/2] rust: debugfs: Support attaching data to DebugFS directories

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Message-ID: <20250503-debugfs-rust-attach-v1-0-dc37081fbfbc@google.com>
Date: Sat, 03 May 2025 00:43:58 +0000
From: Matthew Maurer <mmaurer@...gle.com>
To: Greg Kroah-Hartman <gregkh@...uxfoundation.org>, "Rafael J. Wysocki" <rafael@...nel.org>, 
	Danilo Krummrich <dakr@...nel.org>, Miguel Ojeda <ojeda@...nel.org>, Alex Gaynor <alex.gaynor@...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>, 
	Andreas Hindborg <a.hindborg@...nel.org>, Alice Ryhl <aliceryhl@...gle.com>, 
	Trevor Gross <tmgross@...ch.edu>, Sami Tolvanen <samitolvanen@...gle.com>, 
	Timur Tabi <ttabi@...dia.com>
Cc: rust-for-linux@...r.kernel.org, linux-kernel@...r.kernel.org, 
	Matthew Maurer <mmaurer@...gle.com>
Subject: [PATCH WIP 0/2] rust: debugfs: Support attaching data to DebugFS directories

We can wait to properly review and land this until after we've decided
on the final interface for the first part, but since dakr@...nel.org was
poking at how this might work in his review of the previous patchset, I
wanted to upload this sketch as context.

The general concept here is that you select an owning directory and
attach data to it while converting its lifetime to be invariant (e.g.
can't be shortened) so that you know that the DebugFS contents will be
cleaned up before the data. You can then implement things underneath
that directory using the attached data.

Signed-off-by: Matthew Maurer <mmaurer@...gle.com>
---
Matthew Maurer (2):
      rust: debugfs: Add interface to build debugfs off pinned objects
      rust: debugfs: Extend sample to use attached data

 rust/kernel/debugfs.rs       | 206 ++++++++++++++++++++++++++++++++++++++++---
 samples/rust/rust_debugfs.rs | 110 ++++++++++++++++++++++-
 2 files changed, 302 insertions(+), 14 deletions(-)
---
base-commit: 33035b665157558254b3c21c3f049fd728e72368
change-id: 20250501-debugfs-rust-attach-e164b67c9c16
prerequisite-change-id: 20250428-debugfs-rust-3cd5c97eb7d1:v4
prerequisite-patch-id: 7ac67017c11249cd04fc4beca6cfdb5b83aa89de
prerequisite-patch-id: 2e8256a6ef25afc95279e740f43d17ec169a65f2
prerequisite-patch-id: 0abd76fd2d71ba300d8a5ce5b3b61751feec88fa
prerequisite-patch-id: 5919cceb97187adfc71e9c1899f85d5af092bde6

Best regards,
-- 
Matthew Maurer <mmaurer@...gle.com>