linux-kernel - Re: [PATCH v5] rust: add PidNamespace

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Message-ID: <20241007-notaufnahme-missrede-c81272cb0d24@brauner>
Date: Mon,  7 Oct 2024 13:58:23 +0200
From: Christian Brauner <brauner@...nel.org>
To: Alice Ryhl <aliceryhl@...gle.com>,
	rust-for-linux@...r.kernel.org
Cc: Christian Brauner <brauner@...nel.org>,
	Paul Moore <paul@...l-moore.com>,
	James Morris <jmorris@...ei.org>,
	"Serge E. Hallyn" <serge@...lyn.com>,
	Miguel Ojeda <ojeda@...nel.org>,
	Alex Gaynor <alex.gaynor@...il.com>,
	Wedson Almeida Filho <wedsonaf@...il.com>,
	Boqun Feng <boqun.feng@...il.com>,
	Bjoern Roy Baron <bjorn3_gh@...tonmail.com>,
	Benno Lossin <benno.lossin@...ton.me>,
	Peter Zijlstra <peterz@...radead.org>,
	Alexander Viro <viro@...iv.linux.org.uk>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	Arve Hjonnevag <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,
	linux-security-module@...r.kernel.org,
	linux-fsdevel@...r.kernel.org,
	Kees Cook <kees@...nel.org>,
	Andreas Hindborg <a.hindborg@...nel.org>
Subject: Re: [PATCH v5] rust: add PidNamespace

On Wed, 02 Oct 2024 13:38:10 +0200, Christian Brauner wrote:
> The lifetime of `PidNamespace` is bound to `Task` and `struct pid`.
> 
> The `PidNamespace` of a `Task` doesn't ever change once the `Task` is
> alive. A `unshare(CLONE_NEWPID)` or `setns(fd_pidns/pidfd, CLONE_NEWPID)`
> will not have an effect on the calling `Task`'s pid namespace. It will
> only effect the pid namespace of children created by the calling `Task`.
> This invariant guarantees that after having acquired a reference to a
> `Task`'s pid namespace it will remain unchanged.
> 
> [...]

Applied to the vfs.rust.pid_namespace branch of the vfs/vfs.git tree.
Patches in the vfs.rust.pid_namespace branch should appear in linux-next soon.

Please report any outstanding bugs that were missed during review in a
new review to the original patch series allowing us to drop it.

It's encouraged to provide Acked-bys and Reviewed-bys even though the
patch has now been applied. If possible patch trailers will be updated.

Note that commit hashes shown below are subject to change due to rebase,
trailer updates or similar. If in doubt, please check the listed branch.

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/vfs/vfs.git
branch: vfs.rust.pid_namespace

[1/1] rust: add PidNamespace
      https://git.kernel.org/vfs/vfs/c/2012326b5976