linux-kernel - Re: [PATCH 3/3] rust: miscdevice: adjust the rust_misc

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <CAH5fLgg5tjFowQq=LWQ2BtGVqHmdMMp=9Uxm4BzSy+UiXGPhZA@mail.gmail.com>
Date: Fri, 24 Jan 2025 08:29:38 +0100
From: Alice Ryhl <aliceryhl@...gle.com>
To: Christian Schrefl <chrisi.schrefl@...il.com>
Cc: 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>, 
	Trevor Gross <tmgross@...ch.edu>, Arnd Bergmann <arnd@...db.de>, 
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>, Lee Jones <lee@...nel.org>, 
	rust-for-linux@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 3/3] rust: miscdevice: adjust the rust_misc_device sample
 to use RegistrationData.

On Thu, Jan 23, 2025 at 6:57 PM Christian Schrefl
<chrisi.schrefl@...il.com> wrote:
>
> Hi Alice
>
> On 21.01.25 4:40 PM, Alice Ryhl wrote:
> > On Sun, Jan 19, 2025 at 11:11 PM Christian Schrefl
> > <chrisi.schrefl@...il.com> wrote:
> >>
> >> Share the mutex stored in RustMiscDevice between all instances using an Arc
> >> and the RegistrationData of MiscDeviceRegistration.
> >>
> >> This is mostly to Demonstrate the capability to share data in this way.
> >>
> >> Signed-off-by: Christian Schrefl <chrisi.schrefl@...il.com>
> >
> > This change causes all open files to share the same value, instead of
> > it being per-fd.
>
> I know, if that is unwanted I'm fine with dropping this patch,
> it is mostly here to show how patch 2 can be used.

Perhaps instead of changing the per-fd value, we could add a new
shared value? E.g., it could have a counter for the number of open
files.

Alice