From patchwork Tue Oct 22 21:31:40 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Danilo Krummrich X-Patchwork-Id: 13846171 X-Patchwork-Delegate: bhelgaas@google.com Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 52BA31CDA04; Tue, 22 Oct 2024 21:32:48 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1729632768; cv=none; b=noK2osZ86lCUfHZhR+i5hmNNcKyYY1spSh2HM+6i1D8a2wvPy30kVKEY7+X20d8hRTXPRWlmjimsDYxCKan843t965rr+xjrArmd3+APBartw7PmujqRGHTtpXJVLUkYMo92F0fSUAO6u1mWOhrt96DTeVajzZrW7PFLD5gTLCY= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1729632768; c=relaxed/simple; bh=vBW0av7EC8pdFPFs1anS+QtqcIgaudmaxuc13fjq5aA=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=oS/5j5LzO21Gsqr7+TPrvKml1neyR0RJ84HzrhcKl85yR9itmIK+YlbuEnqq73quQ3dRZ82lLdrnYVK4BSgk1zGL4ILEV8F2Xb+oz71EWtvd56Al76BPGE+zkct5xUPMjsPp3MuW3Xvzw7YNCmwpEijkOAwHSktixmc8LQYJieQ= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=Bmvl3wC3; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="Bmvl3wC3" Received: by smtp.kernel.org (Postfix) with ESMTPSA id C21A8C4CEE3; Tue, 22 Oct 2024 21:32:42 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1729632767; bh=vBW0av7EC8pdFPFs1anS+QtqcIgaudmaxuc13fjq5aA=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=Bmvl3wC3kXB+AIT+O17CFYh98qBKjfNFrAqXvAAif3sYk0IS1iKIGkIPDRizmHA3T 6FioJrJp0b1rBf+pq5B6/xsNnxLCBL7KuNjLVvEue6wQ0MjhtBc+lQQSus8/HnHBT6 PjsZk1UsjOcL0mlilO1sTP9o/i685DJJcvRaj0Uc7wUG0vKJiOaHVrEkvzPShaVBcq KrslVJvgIJk0H9g6mAinLSScn8UjpicWvwmr8lZIIwDYhYvH0IGwzqoPL/jGvIDV6l v6tCiVemtfxOWkQYlBOFX0weOIKGtY06zfmxRRYO0q0kChqqkXgv6NmvmvGcvgqCPG xtJGhe4UzxwsQ== From: Danilo Krummrich To: gregkh@linuxfoundation.org, rafael@kernel.org, bhelgaas@google.com, ojeda@kernel.org, alex.gaynor@gmail.com, boqun.feng@gmail.com, gary@garyguo.net, bjorn3_gh@protonmail.com, benno.lossin@proton.me, tmgross@umich.edu, a.hindborg@samsung.com, aliceryhl@google.com, airlied@gmail.com, fujita.tomonori@gmail.com, lina@asahilina.net, pstanner@redhat.com, ajanulgu@redhat.com, lyude@redhat.com, robh@kernel.org, daniel.almeida@collabora.com, saravanak@google.com Cc: rust-for-linux@vger.kernel.org, linux-kernel@vger.kernel.org, linux-pci@vger.kernel.org, devicetree@vger.kernel.org, Danilo Krummrich Subject: [PATCH v3 03/16] rust: pass module name to `Module::init` Date: Tue, 22 Oct 2024 23:31:40 +0200 Message-ID: <20241022213221.2383-4-dakr@kernel.org> X-Mailer: git-send-email 2.46.2 In-Reply-To: <20241022213221.2383-1-dakr@kernel.org> References: <20241022213221.2383-1-dakr@kernel.org> Precedence: bulk X-Mailing-List: linux-pci@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 In a subsequent patch we introduce the `Registration` abstraction used to register driver structures. Some subsystems require the module name on driver registration (e.g. PCI in __pci_register_driver()), hence pass the module name to `Module::init`. Signed-off-by: Danilo Krummrich --- drivers/block/rnull.rs | 2 +- rust/kernel/lib.rs | 14 ++++++++++---- rust/kernel/net/phy.rs | 2 +- rust/macros/module.rs | 6 ++++-- samples/rust/rust_minimal.rs | 2 +- samples/rust/rust_print.rs | 2 +- 6 files changed, 18 insertions(+), 10 deletions(-) diff --git a/drivers/block/rnull.rs b/drivers/block/rnull.rs index 5de7223beb4d..0e0e9ed7851e 100644 --- a/drivers/block/rnull.rs +++ b/drivers/block/rnull.rs @@ -36,7 +36,7 @@ struct NullBlkModule { } impl kernel::Module for NullBlkModule { - fn init(_module: &'static ThisModule) -> Result { + fn init(_name: &'static CStr, _module: &'static ThisModule) -> Result { pr_info!("Rust null_blk loaded\n"); let tagset = Arc::pin_init(TagSet::new(1, 256, 1), flags::GFP_KERNEL)?; diff --git a/rust/kernel/lib.rs b/rust/kernel/lib.rs index 4fdb0d91f2ad..83f76dc7bad2 100644 --- a/rust/kernel/lib.rs +++ b/rust/kernel/lib.rs @@ -80,7 +80,7 @@ pub trait Module: Sized + Sync + Send { /// should do. /// /// Equivalent to the `module_init` macro in the C API. - fn init(module: &'static ThisModule) -> error::Result; + fn init(name: &'static str::CStr, module: &'static ThisModule) -> error::Result; } /// A module that is pinned and initialised in-place. @@ -88,13 +88,19 @@ pub trait InPlaceModule: Sync + Send { /// Creates an initialiser for the module. /// /// It is called when the module is loaded. - fn init(module: &'static ThisModule) -> impl init::PinInit; + fn init( + name: &'static str::CStr, + module: &'static ThisModule, + ) -> impl init::PinInit; } impl InPlaceModule for T { - fn init(module: &'static ThisModule) -> impl init::PinInit { + fn init( + name: &'static str::CStr, + module: &'static ThisModule, + ) -> impl init::PinInit { let initer = move |slot: *mut Self| { - let m = ::init(module)?; + let m = ::init(name, module)?; // SAFETY: `slot` is valid for write per the contract with `pin_init_from_closure`. unsafe { slot.write(m) }; diff --git a/rust/kernel/net/phy.rs b/rust/kernel/net/phy.rs index 910ce867480a..26631b0e127a 100644 --- a/rust/kernel/net/phy.rs +++ b/rust/kernel/net/phy.rs @@ -899,7 +899,7 @@ struct Module { [$($crate::net::phy::create_phy_driver::<$driver>()),+]; impl $crate::Module for Module { - fn init(module: &'static ThisModule) -> Result { + fn init(_name: &'static CStr, module: &'static ThisModule) -> Result { // SAFETY: The anonymous constant guarantees that nobody else can access // the `DRIVERS` static. The array is used only in the C side. let drivers = unsafe { &mut DRIVERS }; diff --git a/rust/macros/module.rs b/rust/macros/module.rs index a03266a78cfb..3292714ff82e 100644 --- a/rust/macros/module.rs +++ b/rust/macros/module.rs @@ -333,8 +333,10 @@ mod __module_init {{ /// /// This function must only be called once. unsafe fn __init() -> core::ffi::c_int {{ - let initer = - <{type_} as kernel::InPlaceModule>::init(&super::super::THIS_MODULE); + let initer = <{type_} as kernel::InPlaceModule>::init( + kernel::c_str!(\"{name}\"), + &super::super::THIS_MODULE + ); // SAFETY: No data race, since `__MOD` can only be accessed by this module // and there only `__init` and `__exit` access it. These functions are only // called once and `__exit` cannot be called before or during `__init`. diff --git a/samples/rust/rust_minimal.rs b/samples/rust/rust_minimal.rs index 4aaf117bf8e3..1577dc34e563 100644 --- a/samples/rust/rust_minimal.rs +++ b/samples/rust/rust_minimal.rs @@ -17,7 +17,7 @@ struct RustMinimal { } impl kernel::Module for RustMinimal { - fn init(_module: &'static ThisModule) -> Result { + fn init(_name: &'static CStr, _module: &'static ThisModule) -> Result { pr_info!("Rust minimal sample (init)\n"); pr_info!("Am I built-in? {}\n", !cfg!(MODULE)); diff --git a/samples/rust/rust_print.rs b/samples/rust/rust_print.rs index ba1606bdbd75..73763ea2dc09 100644 --- a/samples/rust/rust_print.rs +++ b/samples/rust/rust_print.rs @@ -41,7 +41,7 @@ fn arc_print() -> Result { } impl kernel::Module for RustPrint { - fn init(_module: &'static ThisModule) -> Result { + fn init(_name: &'static CStr, _module: &'static ThisModule) -> Result { pr_info!("Rust printing macros sample (init)\n"); pr_emerg!("Emergency message (level 0) without args\n");