linux-kernel - Re: [PATCH v9 0/8] File abstractions needed by Rust Binder

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Message-ID: <20240902-dickdarm-zumeist-3858e57fb425@brauner>
Date: Mon, 2 Sep 2024 10:02:43 +0200
From: Christian Brauner <brauner@...nel.org>
To: Alice Ryhl <aliceryhl@...gle.com>
Cc: Linus Torvalds <torvalds@...ux-foundation.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>, 
	Andreas Hindborg <a.hindborg@...sung.com>, Peter Zijlstra <peterz@...radead.org>, 
	Alexander Viro <viro@...iv.linux.org.uk>, Greg Kroah-Hartman <gregkh@...uxfoundation.org>, 
	Arve Hjønnevåg <arve@...roid.com>, Todd Kjos <tkjos@...roid.com>, Martijn Coenen <maco@...roid.com>, 
	Joel Fernandes <joel@...lfernandes.org>, Carlos Llamas <cmllamas@...gle.com>, 
	Suren Baghdasaryan <surenb@...gle.com>, Dan Williams <dan.j.williams@...el.com>, 
	Matthew Wilcox <willy@...radead.org>, Thomas Gleixner <tglx@...utronix.de>, Daniel Xu <dxu@...uu.xyz>, 
	Martin Rodriguez Reboredo <yakoyoku@...il.com>, Trevor Gross <tmgross@...ch.edu>, linux-kernel@...r.kernel.org, 
	rust-for-linux@...r.kernel.org, linux-fsdevel@...r.kernel.org, Kees Cook <kees@...nel.org>
Subject: Re: [PATCH v9 0/8] File abstractions needed by Rust Binder

On Thu, Aug 08, 2024 at 04:15:43PM GMT, Alice Ryhl wrote:
> This patchset contains the file abstractions needed by the Rust
> implementation of the Binder driver.
> 
> Please see the Rust Binder RFC for usage examples:
> https://lore.kernel.org/rust-for-linux/20231101-rust-binder-v1-0-08ba9197f637@google.com/
> 
> Users of "rust: types: add `NotThreadSafe`":
> 	[PATCH 5/9] rust: file: add `FileDescriptorReservation`
> 
> Users of "rust: task: add `Task::current_raw`":
> 	[PATCH 7/9] rust: file: add `Kuid` wrapper
> 	[PATCH 8/9] rust: file: add `DeferredFdCloser`
> 
> Users of "rust: file: add Rust abstraction for `struct file`":
> 	[PATCH RFC 02/20] rust_binder: add binderfs support to Rust binder
> 	[PATCH RFC 03/20] rust_binder: add threading support
> 
> Users of "rust: cred: add Rust abstraction for `struct cred`":
> 	[PATCH RFC 05/20] rust_binder: add nodes and context managers
> 	[PATCH RFC 06/20] rust_binder: add oneway transactions
> 	[PATCH RFC 11/20] rust_binder: send nodes in transaction
> 	[PATCH RFC 13/20] rust_binder: add BINDER_TYPE_FD support
> 
> Users of "rust: security: add abstraction for secctx":
> 	[PATCH RFC 06/20] rust_binder: add oneway transactions
> 
> Users of "rust: file: add `FileDescriptorReservation`":
> 	[PATCH RFC 13/20] rust_binder: add BINDER_TYPE_FD support
> 	[PATCH RFC 14/20] rust_binder: add BINDER_TYPE_FDA support
> 
> Users of "rust: file: add `Kuid` wrapper":
> 	[PATCH RFC 05/20] rust_binder: add nodes and context managers
> 	[PATCH RFC 06/20] rust_binder: add oneway transactions
> 
> Users of "rust: file: add abstraction for `poll_table`":
> 	[PATCH RFC 07/20] rust_binder: add epoll support
> 
> This patchset has some uses of read_volatile in place of READ_ONCE.
> Please see the following rfc for context on this:
> https://lore.kernel.org/all/20231025195339.1431894-1-boqun.feng@gmail.com/
> 
> Signed-off-by: Alice Ryhl <aliceryhl@...gle.com>
> ---

So, this won't make v6.12 anymore. There already were pretty big changes
around files for the coming cycle so I did not also want to throw this
into the mix as well. (Sorry that this had to miss it's birthday, Alice.)

However, I do intend to merge a version for this for v6.13. There's some
wrapping of struct cred and specifically of struct secctx that I can
only handwave at. Ideally you get a nod from the LSM maintainers as well
but if that doesn't come in I don't see much point in making this sit in
limbo indefinitely.