linux-kernel - Re: [PATCH v6 23/23] [RFC] drivers: android: Binder IPC in Rust

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Date:   Mon, 9 May 2022 10:52:30 -0700
From:   Todd Kjos <tkjos@...gle.com>
To:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Cc:     Kees Cook <keescook@...omium.org>, Miguel Ojeda <ojeda@...nel.org>,
        Linus Torvalds <torvalds@...ux-foundation.org>,
        rust-for-linux@...r.kernel.org, linux-kernel@...r.kernel.org,
        Jarkko Sakkinen <jarkko@...nel.org>,
        Wedson Almeida Filho <wedsonaf@...gle.com>,
        Alex Gaynor <alex.gaynor@...il.com>,
        Finn Behrens <me@...enk.de>,
        Sven Van Asbroeck <thesven73@...il.com>,
        Gary Guo <gary@...yguo.net>,
        Wayne Campbell <wcampbell1995@...il.com>,
        Arve Hjønnevåg <arve@...roid.com>,
        Todd Kjos <tkjos@...roid.com>,
        Martijn Coenen <maco@...roid.com>,
        Joel Fernandes <joel@...lfernandes.org>,
        Christian Brauner <brauner@...nel.org>,
        Hridya Valsaraju <hridya@...gle.com>,
        Suren Baghdasaryan <surenb@...gle.com>
Subject: Re: [PATCH v6 23/23] [RFC] drivers: android: Binder IPC in Rust

On Sat, May 7, 2022 at 1:13 AM Greg Kroah-Hartman
<gregkh@...uxfoundation.org> wrote:
>
> On Sat, May 07, 2022 at 12:55:17AM -0700, Kees Cook wrote:
> > On Sat, May 07, 2022 at 07:24:21AM +0200, Miguel Ojeda wrote:
> > > From: Wedson Almeida Filho <wedsonaf@...gle.com>
> > >
> > > A port to Rust of the Android Binder IPC mechanism.
> > >
> > > This module is a work in progress and will be sent for review later
> > > on, as well as separately from the Rust support.
> >
> > Is any functionality missing for this driver compared to the C driver?
>
> There is no binderfs support, which would be a major regression if it
> were to be added.
>
> And odds are the new binder additions in the past few months are
> probably not included here either.
>
> There is a binder regression test in Android that can be run to test all
> of this to see what is missing.  That should be a good test of
> compatibility.

There are a set of tests in the Android tree at
frameworks/libs/native/binder/tests, but just booting and having a
usable device with this version replacing the C version is pretty
impressive. Can you boot and run a real device with this?

>
> thanks,
>
> greg k-h