From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-alma10-1.taild15c8.ts.net [100.103.45.18]) (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 E42A84DB568; Tue, 9 Jun 2026 19:16:21 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=100.103.45.18 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1781032582; cv=none; b=in+wEXynmgW0erQKSJEuA0Oa5C8KuoU8JeWoVq0K/WAKUUdJDh5UyWdgT3y83jNEJkLuI47b8uYuthFc/VOK6aJ3JEGao6T+XkQnVbix9uSfygjmZG54b2G7SNPXOekzGSH3jtLrx6ixlS8fst6Y7XRH9FGKkseZNuo9hIAGWHs= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1781032582; c=relaxed/simple; bh=VH2F2EOtPdHOtGslg/ieQKsqzCG4W9fZoz+7ESvbugA=; h=From:Date:Subject:MIME-Version:Content-Type:Message-Id:References: In-Reply-To:To:Cc; b=hPlryEbJjPxzvQauUukl5KBQo7+Cm+9JR4/Sc5qEB1tj7asjKAc8frP9/pp4nOaG//5DGOxB4T9SiyzlSNlyTEcWaO86FOFKoR+q6ZyMuyp7AjjmDutsbVTSKZNSp7DjKTdMv9uVrIfItxWrdwVtVhJtGZ0IlhlXWklPr7vvHZk= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=oErhkH5/; arc=none smtp.client-ip=100.103.45.18 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="oErhkH5/" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 6D7FA1F00898; Tue, 9 Jun 2026 19:16:16 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1781032581; bh=e+XDXLChurzP2r5iP0BK/Xmgv4b9xTF7r8tpuv8eUXo=; h=From:Date:Subject:References:In-Reply-To:To:Cc; b=oErhkH5/RvsU0pYxaGvsH8J04eqib3UlDmfBu006mx+qHGpOK7zmrbYXnd8jITMuF pc81Wo2vAhP5ShprAawD0YzrZr87uu5PIeaaLzwRLlCVGDDSBs9TH2ljfGejE9QFLo 1njvvfMDcPJU8TCJTTuhAe7mvxLaofUY6xXDExPkk+GqRIHJMnXa4IJQ2I64+mQ72l k+yiINMEiMIk1sgMwmop7aLKxDLB8ovJCfSPMlRtQWXqeB9LZRg9L+e3S6ekcNJT2b QutGQosDKhYG0taub6tEw+i183GSKcSUN19YbgznxPNE29KMY1fZzL4VKNXx8/NsZX +JGLZ8fby/Z0Q== From: Andreas Hindborg Date: Tue, 09 Jun 2026 21:07:52 +0200 Subject: [PATCH v2 13/83] block: rust: add `command` getter to `Request` Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit Message-Id: <20260609-rnull-v6-19-rc5-send-v2-13-82c7404542e2@kernel.org> References: <20260609-rnull-v6-19-rc5-send-v2-0-82c7404542e2@kernel.org> In-Reply-To: <20260609-rnull-v6-19-rc5-send-v2-0-82c7404542e2@kernel.org> To: "Liam R. Howlett" , Alice Ryhl , Anna-Maria Behnsen , Benno Lossin , =?utf-8?q?Bj=C3=B6rn_Roy_Baron?= , Boqun Feng , Danilo Krummrich , FUJITA Tomonori , Frederic Weisbecker , Gary Guo , Jens Axboe , John Stultz , Lorenzo Stoakes , Lyude Paul , Miguel Ojeda , Stephen Boyd , Thomas Gleixner , Trevor Gross , "Liam R. Howlett" , Boqun Feng , Lorenzo Stoakes Cc: Andreas Hindborg , linux-block@vger.kernel.org, linux-kernel@vger.kernel.org, linux-mm@kvack.org, rust-for-linux@vger.kernel.org, Andreas Hindborg X-Mailer: b4 0.16-dev X-Developer-Signature: v=1; a=openpgp-sha256; l=1258; i=a.hindborg@kernel.org; h=from:subject:message-id; bh=JgJ/K9nxltyXzGsFxBuvnKQJ52RCZyxIiod6jnOKKd4=; b=owEBbQKS/ZANAwAKAfpQKQiqxb3QAcsmYgBqKGTAUkk0LcDHa3vjJ0+TBKsyJketYcEgtB4lQ W0HgArxGNuJAjMEAAEKAB0WIQRXitnI2WZ2JirAaob6UCkIqsW90AUCaihkwAAKCRD6UCkIqsW9 0IBMD/9LTXBuBuAUnixSWlmlKgnI0lwXtwNfEAaUVoVY0DQ7Lsr+Hb5gWYPkTVBCmyKN8FWHT9j o4tQWP+BaptnALclsraBmmGiV7+m6J2mJZtJFRJosJIaDUkJ99PN0+Nw5GxTUl/vAcoKJiM82hD Femk99RwRCgWkb9zu3RpDebOw2ZP3ssLMoxeKASj7yTQpV0bBaiuWMCfQTYBhnOebVQd96l9URP sPHS1MuQeUcebhigYWJn2EfeIke8EljTgjcQvQf1Kf+lkqWvM5TRf44GXxQZT1mZPjtsBwrBwKu tfWGwgloAAj6FQjS/nZqrJfmV+gjIOEwQosq3LNCAkwFhxW572m/UN47kUc0dvq5qDSnrI8J3JM yuLJODtcJjkUvj5ewwqZpcYa16o+/bS6jo1rEG/EU7Neoni+FE+5qw0Cf8TU70WqqoVMdimrQ74 eR1SmgLCp1Q4/dXLKctTGI5wSOB/MxtUw+ecU75dVlvSjGQpwDOx727LR2bhbBRg7TJy/KFw9lC iTRExSEHadwSnr1F9vreBiS2LyvcUVkNiQp0w3s/lNHw3hYtCiCUD3NNPyWUp3WzvJ/6HBm9rtW +3oIR8BySUbSN40gULMBY64GsLjcYE39eEbdR606WEgnuNvqhOvfals2ZGW2mmHiEPNV7wEivcG GGuPyYMYUFbkwUQ== X-Developer-Key: i=a.hindborg@kernel.org; a=openpgp; fpr=3108C10F46872E248D1FB221376EB100563EF7A7 From: Andreas Hindborg Add a method to extract the command operation code from a request. The command is obtained by masking the lower bits of `cmd_flags` as defined by `REQ_OP_BITS`. This allows Rust block drivers to determine the type of operation being requested. Reviewed-by: Alice Ryhl Signed-off-by: Andreas Hindborg --- rust/kernel/block/mq/request.rs | 7 +++++++ 1 file changed, 7 insertions(+) diff --git a/rust/kernel/block/mq/request.rs b/rust/kernel/block/mq/request.rs index 98e54f0586d1..19bdf17de166 100644 --- a/rust/kernel/block/mq/request.rs +++ b/rust/kernel/block/mq/request.rs @@ -116,6 +116,13 @@ pub(crate) unsafe fn aref_from_raw(ptr: *mut bindings::request) -> ARef { unsafe { ARef::from_raw(NonNull::new_unchecked(ptr.cast())) } } + /// Get the command identifier for the request + pub fn command(&self) -> u32 { + use core::ops::BitAnd; + // SAFETY: By C API contract and type invariant, `cmd_flags` is valid for read + unsafe { (*self.0.get()).cmd_flags }.bitand((1u32 << bindings::REQ_OP_BITS) - 1) + } + /// Complete the request by scheduling `Operations::complete` for /// execution. /// -- 2.51.2