Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.38 as permitted sender) client-ip=23.128.96.38;
Date:   Thu, 30 Nov 2023 15:46:55 +0000
To:     Greg Kroah-Hartman <gregkh@linuxfoundation.org>
From:   Benno Lossin <benno.lossin@proton.me>
Cc:     Alice Ryhl <aliceryhl@google.com>, Miguel Ojeda <ojeda@kernel.org>,
        Alex Gaynor <alex.gaynor@gmail.com>,
        Wedson Almeida Filho <wedsonaf@gmail.com>,
        Boqun Feng <boqun.feng@gmail.com>, Gary Guo <gary@garyguo.net>,
        =?utf-8?Q?Bj=C3=B6rn_Roy_Baron?= <bjorn3_gh@protonmail.com>,
        Andreas Hindborg <a.hindborg@samsung.com>,
        Peter Zijlstra <peterz@infradead.org>,
        Alexander Viro <viro@zeniv.linux.org.uk>,
        Christian Brauner <brauner@kernel.org>,
        =?utf-8?Q?Arve_Hj=C3=B8nnev=C3=A5g?= <arve@android.com>,
        Todd Kjos <tkjos@android.com>,
        Martijn Coenen <maco@android.com>,
        Joel Fernandes <joel@joelfernandes.org>,
        Carlos Llamas <cmllamas@google.com>,
        Suren Baghdasaryan <surenb@google.com>,
        Dan Williams <dan.j.williams@intel.com>,
        Kees Cook <keescook@chromium.org>,
        Matthew Wilcox <willy@infradead.org>,
        Thomas Gleixner <tglx@linutronix.de>,
        Daniel Xu <dxu@dxuuu.xyz>, linux-kernel@vger.kernel.org,
        rust-for-linux@vger.kernel.org, linux-fsdevel@vger.kernel.org
Subject: Re: [PATCH 1/7] rust: file: add Rust abstraction for `struct file`
Message-ID: <2gTL0hxPpSCcVa7uvDLOLcjqd_sgtacZ_6XWaEANBH9Gnz72M1JDmjcWNO9Z7UbIeWNoNqx8y-lb3MAq75pEXL6EQEIED0XLxuHvqaQ9K-g=@proton.me>
In-Reply-To: <2023113041-bring-vagrancy-a417@gregkh>
References: <20231129-alice-file-v1-0-f81afe8c7261@google.com> <20231129-alice-file-v1-1-f81afe8c7261@google.com> <ksVe7fwt0AVWlCOtxIOb-g34okhYeBQUiXvpWLvqfxcyWXXuUuwWEIhUHigcAXJDFRCDr8drPYD1O1VTrDhaeZQ5mVxjCJqT32-2gHozHIo=@proton.me> <2023113041-bring-vagrancy-a417@gregkh>
Feedback-ID: 71780778:user:proton
MIME-Version: 1.0
Content-Type: text/plain; charset=utf-8
Content-Transfer-Encoding: quoted-printable
Precedence: bulk

On 11/30/23 15:59, Greg Kroah-Hartman wrote:
> On Thu, Nov 30, 2023 at 02:53:35PM +0000, Benno Lossin wrote:
>> On 11/29/23 13:51, Alice Ryhl wrote:
>>> +/// Flags associated with a [`File`].
>>> +pub mod flags {
>>> +    /// File is opened in append mode.
>>> +    pub const O_APPEND: u32 =3D bindings::O_APPEND;
>>
>> Why do all of these constants begin with `O_`?
>=20
> Because that is how they are defined in the kernel in the C code.  Why
> would they not be the same here?

Then why does the C side name them that way? Is it because `O_*` is
supposed to mean something, or is it done due to namespacing?

In Rust we have namespacing, so we generally drop common prefixes.

--=20
Cheers,
Benno