From mboxrd@z Thu Jan 1 00:00:00 1970 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 2AD752F361D; Mon, 20 Oct 2025 22:28:13 +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=1760999294; cv=none; b=pUghO/w5J9GBZngq9pzZb4WHSJUp6Mslpv+Zr+POt3vLSCt7UV4encFBXUTfSyy6B2NHhULRzR2dYOlPv61OWdUUCovo7cwCTdkyDMGCBae6GD8weYT9uAtAGaNUjQLlTFWDcS7gZQyr+nG9zehZY5bFxb4nMC/pXT4TQVjJWlg= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1760999294; c=relaxed/simple; bh=VILyRkWz6gqlTn6L+yx2B8Vtnd+jITV1zM+dX0agrB0=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=Gycm8hE50urUMIdCtkmXkDHZ+oVVQB4u5yZLMZgY+q+6LAh9tRwNONcziY7Rf+FusSvjUGQLOVDFTsLmSl7MLqaY3t/2sEI7Q/pqdEwHnGL/slC8Rn7Xfpkgm4UVgFKCy3WsCgN1vUrzupC2aBT9usnF1EinabQcaFOPDKpnT68= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=kjlPpzQz; 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="kjlPpzQz" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 9087FC4CEFB; Mon, 20 Oct 2025 22:28:10 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1760999293; bh=VILyRkWz6gqlTn6L+yx2B8Vtnd+jITV1zM+dX0agrB0=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=kjlPpzQz5rN6H0GmKwhGhCoKotSwHx98SWE3hZMEFGoMyjlRo7/rxnXVbhOD6MQzN 2m6DMSTaDb2+k1JsHmA4IaApj6gQYWP8emPpLO9hsnI5IoBUq3xDGl9LliFoJQZ2Rp 0lB4tF6SEx006cPLvs/Pzrx8SqPR2+sdHGWDedCjKO4QI/UHBxTcgcFm8sM31jI81U bWucR0ogG8XJmwXRaXIvmjfc45MxNaLj7x2SiTP06o/uON6XJoMn5C7Tr6ZyoI3EhS WsGlawfXegDsOVTwKWo6/+FxRNg2t8y4dYfROD5j/IRKso1RtADZNUF90iOz/caAqk AFxFjEiZY0meA== From: Danilo Krummrich To: gregkh@linuxfoundation.org, rafael@kernel.org, ojeda@kernel.org, alex.gaynor@gmail.com, boqun.feng@gmail.com, gary@garyguo.net, bjorn3_gh@protonmail.com, lossin@kernel.org, a.hindborg@kernel.org, aliceryhl@google.com, tmgross@umich.edu, mmaurer@google.com Cc: rust-for-linux@vger.kernel.org, linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, Danilo Krummrich Subject: [PATCH v2 8/8] samples: rust: debugfs_scoped: add example for blobs Date: Tue, 21 Oct 2025 00:26:20 +0200 Message-ID: <20251020222722.240473-9-dakr@kernel.org> X-Mailer: git-send-email 2.51.0 In-Reply-To: <20251020222722.240473-1-dakr@kernel.org> References: <20251020222722.240473-1-dakr@kernel.org> Precedence: bulk X-Mailing-List: rust-for-linux@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Extend the rust_debugfs_scoped sample to demonstrate how to export a large binary object through a ScopedDir. Reviewed-by: Alice Ryhl Signed-off-by: Danilo Krummrich --- samples/rust/rust_debugfs_scoped.rs | 14 ++++++++++---- 1 file changed, 10 insertions(+), 4 deletions(-) diff --git a/samples/rust/rust_debugfs_scoped.rs b/samples/rust/rust_debugfs_scoped.rs index b0c4e76b123e..c80312cf168d 100644 --- a/samples/rust/rust_debugfs_scoped.rs +++ b/samples/rust/rust_debugfs_scoped.rs @@ -9,6 +9,7 @@ use core::sync::atomic::AtomicUsize; use kernel::debugfs::{Dir, Scope}; use kernel::prelude::*; +use kernel::sizes::*; use kernel::sync::Mutex; use kernel::{c_str, new_mutex, str::CString}; @@ -66,18 +67,22 @@ fn create_file_write( GFP_KERNEL, )?; } + let blob = KBox::pin_init(new_mutex!([0x42; SZ_4K]), GFP_KERNEL)?; let scope = KBox::pin_init( - mod_data - .device_dir - .scope(DeviceData { name, nums }, &file_name, |dev_data, dir| { + mod_data.device_dir.scope( + DeviceData { name, nums, blob }, + &file_name, + |dev_data, dir| { for (idx, val) in dev_data.nums.iter().enumerate() { let Ok(name) = CString::try_from_fmt(fmt!("{idx}")) else { return; }; dir.read_write_file(&name, val); } - }), + dir.read_write_binary_file(c_str!("blob"), &dev_data.blob); + }, + ), GFP_KERNEL, )?; (*mod_data.devices.lock()).push(scope, GFP_KERNEL)?; @@ -110,6 +115,7 @@ fn init(device_dir: Dir) -> impl PinInit { struct DeviceData { name: CString, nums: KVec, + blob: Pin>>, } fn init_control(base_dir: &Dir, dyn_dirs: Dir) -> impl PinInit> + '_ { -- 2.51.0