From patchwork Mon Feb 3 11:50:31 2025 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Tamir Duberstein X-Patchwork-Id: 13957323 Received: from mail-qv1-f52.google.com (mail-qv1-f52.google.com [209.85.219.52]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 28AA320370D; Mon, 3 Feb 2025 11:50:38 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.219.52 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1738583441; cv=none; b=uhODdYBjnKXI1YdmDt4ccOxQ8F8HTDzE6K49yBrWiTYbq9yQHqXA7kXXNIxqsdWU0BxoTfwVdhlZ5lC6hIr3Zks+XT5ATsTCU11RiKqAetmw+AiwNFXYgu6RgoXPz7W/hKYp3NGVe+gCqijArU58i3iHFAJVhbuDFcKlUTJXbFg= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1738583441; c=relaxed/simple; bh=eORAKQVLowETgizLa4/np6sYZbSCzYW5ILAB+ErjH1o=; h=From:Date:Subject:MIME-Version:Content-Type:Message-Id:References: In-Reply-To:To:Cc; b=InSnOsSxBZkVjUYAzBfiDf5nEOSQLwVIgHYTc8fAUIiH21sOh2hJsdCiKIXFLkG0a80TGY/V3zexsBjR6WuwAaZNHUKIRKgyCOlnrcs84B6ruXxGUVkURlge2wZug/ErJfL77CPGtAHnluZhpaIpr6F7+AOTqYJ86QpioM0Z06E= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=gmail.com; spf=pass smtp.mailfrom=gmail.com; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b=hX7ijgmV; arc=none smtp.client-ip=209.85.219.52 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=gmail.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=gmail.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="hX7ijgmV" Received: by mail-qv1-f52.google.com with SMTP id 6a1803df08f44-6d888fc8300so19450566d6.3; Mon, 03 Feb 2025 03:50:38 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20230601; t=1738583438; x=1739188238; darn=vger.kernel.org; h=cc:to:in-reply-to:references:message-id:content-transfer-encoding :mime-version:subject:date:from:from:to:cc:subject:date:message-id :reply-to; bh=NNPwVnOFpCLxp1yviLIHuAXCLL7HWNGaSzEhnwzmXGQ=; b=hX7ijgmVXNJH3gBb1wptCpvEpXZ/+w7FAcPyTBk6D1Yw07BsfPTrGoyZtdj1A0rIzf I0tQr8T4y3OpLDvAA6G2DF9gvctsczxkuKVxGJ42xmfOa+Otuv5eoL4df5nCUwAuQkC5 7BwDRnu8MiXlu2cs/MBT/ptC2sPTD8wgagFHLQSC2a+tm/53STlgZIeb3Rg/ieUzeGm/ iIcdkttcIlHcwZU2ZvXCp0KxBgX2iMOSJe3+Z44+M30PqdOk6feUpN2EBv1ZTrMd2vHo 855miGesVBKvEwjOTlOdLqMR5z66vCh0TN3qs+C/yqx74g3/ulMUYbU415hYChvWTp0Z 1oCA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1738583438; x=1739188238; h=cc:to:in-reply-to:references:message-id:content-transfer-encoding :mime-version:subject:date:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=NNPwVnOFpCLxp1yviLIHuAXCLL7HWNGaSzEhnwzmXGQ=; b=JwSYANm3AoUzWvTPIfYUd8MK3BnKdKyT2QP8EXsbT7xwmQWFEYIsyuI3e8HlQh6JaQ FqGidDm9GC18bxcb02OtMnM0Pfl1AfCxa+87lo7TbOHBbU8kqj1Ihe/GMFLTvjG3orQp cwL2kJJ/2n+i3Lc8LldkkamBTH9qq8ajBgjVP5CvxYiIUtwyehj0xu3OixiayrLrdQFI 6OlkxmPdcd9ImfbySHK8+Zu0KxR4PvtcD9PIMXy7xsd/kh+0YolDJ7gwjoHzG2NUdr1n nifmMus/0iw9jsXp9vIGBRQUkIkWjsrJLmPx1Xfg3Eg0lMNCxnDkOosEjdsQ2W0P1jLF tlEw== X-Forwarded-Encrypted: i=1; AJvYcCXNzSbmT0RNBJO65WEExxk4V3aK5uDIKuwROmhzTVWEguRZzFYQKy3ZXALfAnlaHeGo7a5fo6/s6UJ4ZSw=@vger.kernel.org X-Gm-Message-State: AOJu0YyahtDgSjeyrmLg5L7cokWFOZKZ4T0FKs19iUhQa6MwbvlJZQah foDVLOipldnu1+h0V5S20o+KxkVNzLzA5HO1PyI+sAq06bWW5Ots X-Gm-Gg: ASbGncvERDXpFFOr1ilLIv3yRuLlgX5a9AmVEUvjX2nGnVRdDLWHpB45gLfrEXrhuw/ e2LL/u++CP6AbwABac69qahws6DZ1VM0T1BEXTF1GBl+FiXLcnmv64CBz5SM85g2SOz3WtKhwiX 7OCRh2DOwOifazEmafavtGKJpbizI5XWcIAg0TGYGL6mFUyk3K8uKEfFiYQhWrZ9S4fBRFc3DoH vwDzPGw5Qsi5hqPgOMNqJvlOdd1vY70jzci2TyuXkty1XiYpC1iqG8t4P2FtNYkie166R4uDAqz mpjyeWNDcNIFWmATLHiWNa4UHcs92BLRpqxtuHQ= X-Google-Smtp-Source: AGHT+IFqUxAC1WEwTP4E/w5Z5FP3YbWo/tiHf45pLds0UPDhlMzKavJBxzOaAwcdAo4yCOS91vjS/g== X-Received: by 2002:a05:6214:2347:b0:6d8:99cf:d2eb with SMTP id 6a1803df08f44-6e243bf439emr290139156d6.21.1738583437854; Mon, 03 Feb 2025 03:50:37 -0800 (PST) Received: from tamird-mac.local ([2600:4041:5be7:7c00:f07f:fb14:288d:6f1e]) by smtp.gmail.com with ESMTPSA id 6a1803df08f44-6e254835641sm49537626d6.62.2025.02.03.03.50.36 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 03 Feb 2025 03:50:36 -0800 (PST) From: Tamir Duberstein Date: Mon, 03 Feb 2025 06:50:31 -0500 Subject: [PATCH v8 1/4] rust: move BStr,CStr Display impls behind method Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Message-Id: <20250203-cstr-core-v8-1-cb3f26e78686@gmail.com> References: <20250203-cstr-core-v8-0-cb3f26e78686@gmail.com> In-Reply-To: <20250203-cstr-core-v8-0-cb3f26e78686@gmail.com> To: Michal Rostecki , Miguel Ojeda , Alex Gaynor , Boqun Feng , Gary Guo , =?utf-8?q?Bj=C3=B6rn_Roy_Baron?= , Benno Lossin , Andreas Hindborg , Alice Ryhl , Trevor Gross Cc: rust-for-linux@vger.kernel.org, linux-kernel@vger.kernel.org, Tamir Duberstein X-Mailer: b4 0.15-dev There are two reasons for doing this: - Moving the Display impl behind a display method matches the style used in the standard library for printing non-Unicode data. - The standard library's core::ffi::CStr doesn't implement Display; moving Display to a helper struct is a necessary step toward using it. Signed-off-by: Tamir Duberstein --- rust/kernel/kunit.rs | 9 ++-- rust/kernel/str.rs | 121 +++++++++++++++++++++++++++++++++++---------------- 2 files changed, 90 insertions(+), 40 deletions(-) diff --git a/rust/kernel/kunit.rs b/rust/kernel/kunit.rs index 824da0e9738a..630b947c708c 100644 --- a/rust/kernel/kunit.rs +++ b/rust/kernel/kunit.rs @@ -56,6 +56,7 @@ macro_rules! kunit_assert { break 'out; } + static NAME: &'static $crate::str::CStr = $crate::c_str!($name); static FILE: &'static $crate::str::CStr = $crate::c_str!($file); static LINE: i32 = core::line!() as i32 - $diff; static CONDITION: &'static $crate::str::CStr = $crate::c_str!(stringify!($condition)); @@ -71,11 +72,13 @@ macro_rules! kunit_assert { // // This mimics KUnit's failed assertion format. $crate::kunit::err(format_args!( - " # {}: ASSERTION FAILED at {FILE}:{LINE}\n", - $name + " # {NAME}: ASSERTION FAILED at {FILE}:{LINE}\n", + NAME = NAME.display(), + FILE = FILE.display(), )); $crate::kunit::err(format_args!( - " Expected {CONDITION} to be true, but is false\n" + " Expected {CONDITION} to be true, but is false\n", + CONDITION = CONDITION.display(), )); $crate::kunit::err(format_args!( " Failure not reported to KUnit since this is a non-KUnit task\n" diff --git a/rust/kernel/str.rs b/rust/kernel/str.rs index 28e2201604d6..c273f1367607 100644 --- a/rust/kernel/str.rs +++ b/rust/kernel/str.rs @@ -31,29 +31,77 @@ pub const fn from_bytes(bytes: &[u8]) -> &Self { // SAFETY: `BStr` is transparent to `[u8]`. unsafe { &*(bytes as *const [u8] as *const BStr) } } -} -impl fmt::Display for BStr { - /// Formats printable ASCII characters, escaping the rest. + /// Returns an object that implements [`Display`] for safely printing a [`BStr`] that may + /// contain non-Unicode data. If you would like an implementation which escapes the [`BStr`] + /// please use [`Debug`] instead. + /// + /// [`Display`]: fmt::Display + /// [`Debug`]: fmt::Debug + /// + /// # Examples /// /// ``` - /// # use kernel::{fmt, b_str, str::{BStr, CString}}; + /// # use kernel::{fmt, b_str, str::CString}; /// let ascii = b_str!("Hello, BStr!"); - /// let s = CString::try_from_fmt(fmt!("{}", ascii))?; + /// let s = CString::try_from_fmt(fmt!("{}", ascii.display()))?; /// assert_eq!(s.as_bytes(), "Hello, BStr!".as_bytes()); /// /// let non_ascii = b_str!(" From patchwork Mon Feb 3 11:50:32 2025 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Tamir Duberstein X-Patchwork-Id: 13957329 Received: from mail-qk1-f181.google.com (mail-qk1-f181.google.com [209.85.222.181]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 61CD7204095; Mon, 3 Feb 2025 11:50:41 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.222.181 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1738583444; cv=none; b=aoEWnsVkKSYr08MS2mfmLwbtqUf8/KyJ1oSQ4unLaHlqCRnNPKY4xzetqn3hH5L1SXoJEG2qyWx7d0HXev/v1n76ARYuOa6+ySC5/M8nsV+ymLyJZxvK5jGoG+MUsCVrd7iWHl4HL5rG64V5NJeakvJ6LLqoKgySxoVfZq70TwQ= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1738583444; c=relaxed/simple; bh=gnEvj0qvIvmU2oVDiZardE2SbQD4dkrDcUwohMuTduo=; h=From:Date:Subject:MIME-Version:Content-Type:Message-Id:References: In-Reply-To:To:Cc; b=buvcsjca7ENj/HomH33Dm7HArLUsTKlGqsTt35lGtfBXf3pDfZhKsmBPzfmuNBUFvV9graNtnmCo/wZjDnhVCXX1s19qMG93KMCLEFz+c1SaX93k5p8hR0qGYmh76OaB/KXZfO/OFdzx/wHLY6JEF/V0CNj3O9WIC14zrGMti/g= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=gmail.com; spf=pass smtp.mailfrom=gmail.com; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b=Z6bGQwD4; arc=none smtp.client-ip=209.85.222.181 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=gmail.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=gmail.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="Z6bGQwD4" Received: by mail-qk1-f181.google.com with SMTP id af79cd13be357-7b6f53c12adso374890385a.1; Mon, 03 Feb 2025 03:50:41 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20230601; t=1738583440; x=1739188240; darn=vger.kernel.org; h=cc:to:in-reply-to:references:message-id:content-transfer-encoding :mime-version:subject:date:from:from:to:cc:subject:date:message-id :reply-to; bh=zeVAzPKfSNYNKB2nHDfHMxYheyBSx+D996etKjt1JVQ=; b=Z6bGQwD4yYGR/XVUVYiMeyRiPzd7ZtwO9b8LzrlRT6PmWx0UIwC3VkDjgO5uoAwt6P e30EYH/ScbiOgg4JdUUjStbyeelmNznQMrzcwXDFa+e6bUN6fItd0ERBl6/NVx9cyJBp UR944xfj37zfWvglLxhnnfjmbsjaIRNEdakTesFqYzdZX2UZ2SsDltNgo2VVPIlkGDBF MkmGsz4rX/SPYHr8xyJKiEHvIYblEuqQAZyovKhtR9rjrObAVYG7P+W6gdtCkwIUsA6E uVnpQoddF2xRaygMfZaE8JrSIZgn7ZKTcFM2QzvBMgUPimsf/+Wr0iicC2cHWNr/Apqx +dFQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1738583440; x=1739188240; h=cc:to:in-reply-to:references:message-id:content-transfer-encoding :mime-version:subject:date:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=zeVAzPKfSNYNKB2nHDfHMxYheyBSx+D996etKjt1JVQ=; b=wlRP3A5jf1BKbrAYlKuJ15iOG+57SAgY5nV30HN/15alUGirgHi/x2Pbernyr03OKj qZnLXxJ4jBN9rLa6FtSYLoMxFMsBoFtO+iHl+04RWp7NkM1WRIBlyozd14QTsNxeHLry QtjDk9FP5mH6/BGCdEMTzNnIcWUTknfI9cMG6VNVATStyywvU7eVSLd5zpZ9v5tC2V3P XnoctXFHuO9D8kOyq0DYN+bRShXrIctj9F35Al5qSP4MVyi/M11RRygrN6mrjlTNSFr1 Avm8KI5oo/cobXquhIMQEtQus2UOwWbDTkmmLjK1iY42ZubOzPDLBHNijsviAqsmy4+i Zy9g== X-Forwarded-Encrypted: i=1; AJvYcCW9ATcOUrMCWg6OO2Yu8eu2ll4p7Z+bxopOedZbT7gpHWy47yOwQ8UABS0k/koaXrvjlcTQ5cnsXJ9tHEU=@vger.kernel.org X-Gm-Message-State: AOJu0YyT6i6i14YGttCxUvNNJAQuwP9DtzEqeBcm7ABqJrXrL+cknVVR Dd+leFoBbX2yUJlxiETYswqoRLXFPJhF2FUo4qS0bYIhNQrpxWypscnl3+BYhxc= X-Gm-Gg: ASbGncsVp0x/xmdaFqS1poqBsgxN0GKGgLxjSKnr3MfdUQmVg44i696B2d3ivoyMU9/ qksZHzLed2qwv1DJpqAVsRuYcHSXdSZN6Ky0anI9RIWt1yzAcKrHwd1y8TFQqS/u6GhRJ3ZAgL+ SdXBslGXvKbIdJNLIWchKai8amFuW6HVRoQW85jKmQOeH60Nw4Ln67hdOOdrlM8q2LH+zG0aiJj tyNc6C9v58/ojQM6eK4xpdMxO2+KEK1ZrUDYIqp7XriavBkyjWPPxXt2SMau2/cFLs3hyDptXMb O1Q1MJvkzWeBJKbGLVcn6pUdXfr7N7DKvotPGlw= X-Google-Smtp-Source: AGHT+IGjxkNZaKOPFBlc0Eh8Bl3tpbQ1Xc6fXP9vpb/ptnR6D+Erxeb9ysj0AJUth/lUePYUk1PhUw== X-Received: by 2002:a0c:aa5b:0:b0:6e2:49d0:6897 with SMTP id 6a1803df08f44-6e249d06ae0mr184977116d6.24.1738583439835; Mon, 03 Feb 2025 03:50:39 -0800 (PST) Received: from tamird-mac.local ([2600:4041:5be7:7c00:f07f:fb14:288d:6f1e]) by smtp.gmail.com with ESMTPSA id 6a1803df08f44-6e254835641sm49537626d6.62.2025.02.03.03.50.37 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 03 Feb 2025 03:50:38 -0800 (PST) From: Tamir Duberstein Date: Mon, 03 Feb 2025 06:50:32 -0500 Subject: [PATCH v8 2/4] rust: replace `CStr` with `core::ffi::CStr` Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Message-Id: <20250203-cstr-core-v8-2-cb3f26e78686@gmail.com> References: <20250203-cstr-core-v8-0-cb3f26e78686@gmail.com> In-Reply-To: <20250203-cstr-core-v8-0-cb3f26e78686@gmail.com> To: Michal Rostecki , Miguel Ojeda , Alex Gaynor , Boqun Feng , Gary Guo , =?utf-8?q?Bj=C3=B6rn_Roy_Baron?= , Benno Lossin , Andreas Hindborg , Alice Ryhl , Trevor Gross Cc: rust-for-linux@vger.kernel.org, linux-kernel@vger.kernel.org, Tamir Duberstein X-Mailer: b4 0.15-dev `std::ffi::CStr` was moved to `core::ffi::CStr` in Rust 1.64. Replace `kernel::str::CStr` with `core::ffi::CStr` now that we can. C-String literals were added in Rust 1.77. Opportunistically replace instances of `kernel::c_str!` with C-String literals where other code changes were already necessary; the rest will be done in a later commit. Signed-off-by: Tamir Duberstein --- rust/kernel/device.rs | 4 +- rust/kernel/error.rs | 4 +- rust/kernel/kunit.rs | 4 +- rust/kernel/miscdevice.rs | 2 +- rust/kernel/net/phy.rs | 2 +- rust/kernel/of.rs | 2 +- rust/kernel/prelude.rs | 5 +- rust/kernel/seq_file.rs | 4 +- rust/kernel/str.rs | 407 +++++++++++----------------------------- rust/kernel/sync/condvar.rs | 2 +- rust/kernel/sync/lock.rs | 2 +- rust/kernel/sync/lock/global.rs | 2 +- 12 files changed, 126 insertions(+), 314 deletions(-) diff --git a/rust/kernel/device.rs b/rust/kernel/device.rs index db2d9658ba47..df4bfa5f51ea 100644 --- a/rust/kernel/device.rs +++ b/rust/kernel/device.rs @@ -12,7 +12,7 @@ use core::{fmt, ptr}; #[cfg(CONFIG_PRINTK)] -use crate::c_str; +use crate::str::CStrExt as _; /// A reference-counted device. /// @@ -176,7 +176,7 @@ unsafe fn printk(&self, klevel: &[u8], msg: fmt::Arguments<'_>) { bindings::_dev_printk( klevel as *const _ as *const crate::ffi::c_char, self.as_raw(), - c_str!("%pA").as_char_ptr(), + c"%pA".as_char_ptr(), &msg as *const _ as *const crate::ffi::c_void, ) }; diff --git a/rust/kernel/error.rs b/rust/kernel/error.rs index f6ecf09cb65f..cff9204d9dd6 100644 --- a/rust/kernel/error.rs +++ b/rust/kernel/error.rs @@ -163,6 +163,8 @@ pub fn name(&self) -> Option<&'static CStr> { if ptr.is_null() { None } else { + use crate::str::CStrExt as _; + // SAFETY: The string returned by `errname` is static and `NUL`-terminated. Some(unsafe { CStr::from_char_ptr(ptr) }) } @@ -187,7 +189,7 @@ fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result { Some(name) => f .debug_tuple( // SAFETY: These strings are ASCII-only. - unsafe { core::str::from_utf8_unchecked(name) }, + unsafe { core::str::from_utf8_unchecked(name.to_bytes()) }, ) .finish(), } diff --git a/rust/kernel/kunit.rs b/rust/kernel/kunit.rs index 630b947c708c..d858757aeace 100644 --- a/rust/kernel/kunit.rs +++ b/rust/kernel/kunit.rs @@ -101,12 +101,12 @@ unsafe impl Sync for Location {} unsafe impl Sync for UnaryAssert {} static LOCATION: Location = Location($crate::bindings::kunit_loc { - file: FILE.as_char_ptr(), + file: $crate::str::as_char_ptr_in_const_context(FILE), line: LINE, }); static ASSERTION: UnaryAssert = UnaryAssert($crate::bindings::kunit_unary_assert { assert: $crate::bindings::kunit_assert {}, - condition: CONDITION.as_char_ptr(), + condition: $crate::str::as_char_ptr_in_const_context(CONDITION), expected_true: true, }); diff --git a/rust/kernel/miscdevice.rs b/rust/kernel/miscdevice.rs index e14433b2ab9d..78c150270080 100644 --- a/rust/kernel/miscdevice.rs +++ b/rust/kernel/miscdevice.rs @@ -34,7 +34,7 @@ pub const fn into_raw(self) -> bindings::miscdevice { // SAFETY: All zeros is valid for this C type. let mut result: bindings::miscdevice = unsafe { MaybeUninit::zeroed().assume_init() }; result.minor = bindings::MISC_DYNAMIC_MINOR as _; - result.name = self.name.as_char_ptr(); + result.name = crate::str::as_char_ptr_in_const_context(self.name); result.fops = create_vtable::(); result } diff --git a/rust/kernel/net/phy.rs b/rust/kernel/net/phy.rs index bb654a28dab3..73df0f55f94e 100644 --- a/rust/kernel/net/phy.rs +++ b/rust/kernel/net/phy.rs @@ -504,7 +504,7 @@ unsafe impl Sync for DriverVTable {} pub const fn create_phy_driver() -> DriverVTable { // INVARIANT: All the fields of `struct phy_driver` are initialized properly. DriverVTable(Opaque::new(bindings::phy_driver { - name: T::NAME.as_char_ptr().cast_mut(), + name: crate::str::as_char_ptr_in_const_context(T::NAME), flags: T::FLAGS, phy_id: T::PHY_DEVICE_ID.id, phy_id_mask: T::PHY_DEVICE_ID.mask_as_int(), diff --git a/rust/kernel/of.rs b/rust/kernel/of.rs index 04f2d8ef29cb..12ea65df46de 100644 --- a/rust/kernel/of.rs +++ b/rust/kernel/of.rs @@ -29,7 +29,7 @@ fn index(&self) -> usize { impl DeviceId { /// Create a new device id from an OF 'compatible' string. pub const fn new(compatible: &'static CStr) -> Self { - let src = compatible.as_bytes_with_nul(); + let src = compatible.to_bytes_with_nul(); // Replace with `bindings::of_device_id::default()` once stabilized for `const`. // SAFETY: FFI type is valid to be zero-initialized. let mut of: bindings::of_device_id = unsafe { core::mem::zeroed() }; diff --git a/rust/kernel/prelude.rs b/rust/kernel/prelude.rs index dde2e0649790..96e7029c27da 100644 --- a/rust/kernel/prelude.rs +++ b/rust/kernel/prelude.rs @@ -34,7 +34,10 @@ pub use super::error::{code::*, Error, Result}; -pub use super::{str::CStr, ThisModule}; +pub use super::{ + str::{CStr, CStrExt as _}, + ThisModule, +}; pub use super::init::{InPlaceInit, InPlaceWrite, Init, PinInit}; diff --git a/rust/kernel/seq_file.rs b/rust/kernel/seq_file.rs index 04947c672979..073a38e6991f 100644 --- a/rust/kernel/seq_file.rs +++ b/rust/kernel/seq_file.rs @@ -4,7 +4,7 @@ //! //! C header: [`include/linux/seq_file.h`](srctree/include/linux/seq_file.h) -use crate::{bindings, c_str, types::NotThreadSafe, types::Opaque}; +use crate::{bindings, str::CStrExt as _, types::NotThreadSafe, types::Opaque}; /// A utility for generating the contents of a seq file. #[repr(transparent)] @@ -35,7 +35,7 @@ pub fn call_printf(&self, args: core::fmt::Arguments<'_>) { unsafe { bindings::seq_printf( self.inner.get(), - c_str!("%pA").as_char_ptr(), + c"%pA".as_char_ptr(), &args as *const _ as *const crate::ffi::c_void, ); } diff --git a/rust/kernel/str.rs b/rust/kernel/str.rs index c273f1367607..13dd2f6cc572 100644 --- a/rust/kernel/str.rs +++ b/rust/kernel/str.rs @@ -4,7 +4,7 @@ use crate::alloc::{flags::*, AllocError, KVec}; use core::fmt::{self, Write}; -use core::ops::{self, Deref, DerefMut, Index}; +use core::ops::{Deref, DerefMut}; use crate::error::{code::*, Error}; @@ -45,11 +45,11 @@ pub const fn from_bytes(bytes: &[u8]) -> &Self { /// # use kernel::{fmt, b_str, str::CString}; /// let ascii = b_str!("Hello, BStr!"); /// let s = CString::try_from_fmt(fmt!("{}", ascii.display()))?; - /// assert_eq!(s.as_bytes(), "Hello, BStr!".as_bytes()); + /// assert_eq!(s.to_bytes(), "Hello, BStr!".as_bytes()); /// /// let non_ascii = b_str!(" From patchwork Mon Feb 3 11:50:33 2025 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Tamir Duberstein X-Patchwork-Id: 13957327 Received: from mail-qk1-f171.google.com (mail-qk1-f171.google.com [209.85.222.171]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 6FD94204596; Mon, 3 Feb 2025 11:50:42 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.222.171 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1738583447; cv=none; b=c/uNBU5HyaXuKwtWg6tmZy7vUxxHoZNjCCiqnDg2pcBPzsRW9OrTtLFvt7IL5VZeO2VHG8qHGLgC3pq9FnAljY47MxOdXm6DP146JmTF4hzMAjSmFcC8FBTYwr8sTxtVvnxKbOsxGGcjslhVSQAyqqCHYA0qdRRUM6S16CUfCJ0= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1738583447; c=relaxed/simple; bh=Xc/9ZA1svD+W8Zk+r5r2vEEtYQy0QL9FvwxWHubcuTU=; h=From:Date:Subject:MIME-Version:Content-Type:Message-Id:References: In-Reply-To:To:Cc; b=MTICW2qx0CAeKBfEN7gtgQ9230QQZuopfWeSSAkxTX8q8S8O2dOfitwwGOTArz6EdIfCB2xTk/r6xId3pk0nbwdu9EkKlf3x5M1zK8oLr6c1aQsuc37JgxamBAxm4kdOgm04jv4fWg/m4ltnBz5tBY1YwHsk+IjYKEHScTVyKLk= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=gmail.com; spf=pass smtp.mailfrom=gmail.com; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b=hmWYH7b+; arc=none smtp.client-ip=209.85.222.171 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=gmail.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=gmail.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="hmWYH7b+" Received: by mail-qk1-f171.google.com with SMTP id af79cd13be357-7be3d681e74so380473185a.0; Mon, 03 Feb 2025 03:50:42 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20230601; t=1738583441; x=1739188241; darn=vger.kernel.org; h=cc:to:in-reply-to:references:message-id:content-transfer-encoding :mime-version:subject:date:from:from:to:cc:subject:date:message-id :reply-to; bh=1Vy9EadRf3cXRaDYVz9+tg0Vbxem82yzCopxglP0KpQ=; b=hmWYH7b+foOFA/hZZ0aDt0WP5CIeeHquSJ9YBscQr8jiJP1XjAtIljRsbgureoj+Oq 37x+93R/DdI7EZRcecsFL9SXNuZI1SDJSNV/W/tfvH3R1y9ShjTGVmC4hjgvIxmrwI6b /ag/JilCh4dgpjqTD1LJF3cflbIFB0DS5vlTnEKD2DChYMLIlkJFtZyNtj02amkqrCYy 974VtwjNxbleekjknkqaMaFXafPXi626folMS/TS5BlYxAV7qKED5hDueqctal2jKZvz z8a84aRK9kk4OLWq4lgda0etjH6Fu5h9pyEafUfmdieIcKd36UwCj0rvTn6kbCynTojR DnHw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1738583441; x=1739188241; h=cc:to:in-reply-to:references:message-id:content-transfer-encoding :mime-version:subject:date:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=1Vy9EadRf3cXRaDYVz9+tg0Vbxem82yzCopxglP0KpQ=; b=hpM5IF8tPyHdAY3JSX9BVIO9R13mJGotJqR8I0OIhilYhhEqgOe3/yTOvtGuG2BQK0 svSqM9Jfgg6Yv/DWeni77WhPSNRFkOH3Kxm9ojvoIXMm1duW52zkjAUfnut5rZEmZjNy 0RpynpUTHxGULwbm3IWcOh/F8g/FqK8xrOOudpEGU98ov8+R/LRz75EmCQz/uSm2Dh9O ovLXRulY3e/s7pnQmiI+Iz7kbippOxh8eWjYz3FAnHFy0UHBF+2ASdzo0+34Z4iYShI6 UnxoDG1xAo2WBfnaG1CWjzbIixwMShxjueq6wqqFXkuHFHqVxu5OuyC6taBjmJL/d8g+ vTgQ== X-Forwarded-Encrypted: i=1; AJvYcCW7khuE1i12v3DfKQpit1tRa5nszjvXMswa98BMrzXy1PXZ88PT0XMSZO26PlCs1g2S7ade5eUza7Kn9/M=@vger.kernel.org X-Gm-Message-State: AOJu0Yw8mlRFcGxYJz/JZJYuWHFLKue2qFIXSde2qEzBtbk0Ze7Wghz6 T8rS7xn7HUvl9kKR4vaslTq4/RUfwZnGTpP2BjIGZ6fbHplj/mn+9syn8ZKUI+g= X-Gm-Gg: ASbGncs0cDDkGCaM1SxGmpP/8Ragr9+uCEnMgt44XMSQ/IUsNfJLnSS+ZDxjiUXTF5a RrLZk6TV6qDwYWOlotHb/gObKS1Nfz4c3UmF3tNP/4RCJNdBGJCW1zKgOb077DgcgsiqLga02I+ Xqr4hsbleHJLQE+C114faPfnQ6YGjTlj8KhrA4E5yn84oGCfPA9LsYf7JvorW7rzl4M3H7xPF9y wqZmQxYWuWYXviOKdDj31Udg+i7zA2n2R3YHuseQpDFxBKzsSQy+8ccxD7bkd6/9s/xmhqepkuT J+Z97lMD5O4Opp05fAqOTpNwcZ2iyBwmi2eV0Ww= X-Google-Smtp-Source: AGHT+IHWgxRU9v/Ez3h8OweUu3jQ+PJx/BV+W9M3oi5krURPloo+fJ7rKnLAl8ODDkccIXynfeVPZQ== X-Received: by 2002:ad4:5c6d:0:b0:6e1:6aa2:2156 with SMTP id 6a1803df08f44-6e243ca86demr271251166d6.30.1738583441123; Mon, 03 Feb 2025 03:50:41 -0800 (PST) Received: from tamird-mac.local ([2600:4041:5be7:7c00:f07f:fb14:288d:6f1e]) by smtp.gmail.com with ESMTPSA id 6a1803df08f44-6e254835641sm49537626d6.62.2025.02.03.03.50.40 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 03 Feb 2025 03:50:40 -0800 (PST) From: Tamir Duberstein Date: Mon, 03 Feb 2025 06:50:33 -0500 Subject: [PATCH v8 3/4] rust: replace `kernel::c_str!` with C-Strings Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Message-Id: <20250203-cstr-core-v8-3-cb3f26e78686@gmail.com> References: <20250203-cstr-core-v8-0-cb3f26e78686@gmail.com> In-Reply-To: <20250203-cstr-core-v8-0-cb3f26e78686@gmail.com> To: Michal Rostecki , Miguel Ojeda , Alex Gaynor , Boqun Feng , Gary Guo , =?utf-8?q?Bj=C3=B6rn_Roy_Baron?= , Benno Lossin , Andreas Hindborg , Alice Ryhl , Trevor Gross Cc: rust-for-linux@vger.kernel.org, linux-kernel@vger.kernel.org, Tamir Duberstein X-Mailer: b4 0.15-dev C-String literals were added in Rust 1.77. Replace instances of `kernel::c_str!` with C-String literals where possible and rename `kernel::c_str!` to `c_str_avoid_literals` to clarify its intended use. Closes: https://github.com/Rust-for-Linux/linux/issues/1075 Signed-off-by: Tamir Duberstein --- drivers/net/phy/ax88796b_rust.rs | 7 +++---- drivers/net/phy/qt2025.rs | 5 ++--- rust/kernel/devres.rs | 2 +- rust/kernel/firmware.rs | 4 ++-- rust/kernel/kunit.rs | 7 ++++--- rust/kernel/net/phy.rs | 6 ++---- rust/kernel/platform.rs | 4 ++-- rust/kernel/str.rs | 37 +++++++++++++++++++++++------------- rust/kernel/sync.rs | 4 ++-- rust/kernel/sync/lock/global.rs | 3 ++- rust/macros/module.rs | 2 +- samples/rust/rust_driver_pci.rs | 4 ++-- samples/rust/rust_driver_platform.rs | 4 ++-- samples/rust/rust_misc_device.rs | 3 +-- 14 files changed, 50 insertions(+), 42 deletions(-) diff --git a/drivers/net/phy/ax88796b_rust.rs b/drivers/net/phy/ax88796b_rust.rs index 8c7eb009d9fc..b07d36f45a43 100644 --- a/drivers/net/phy/ax88796b_rust.rs +++ b/drivers/net/phy/ax88796b_rust.rs @@ -5,7 +5,6 @@ //! //! C version of this driver: [`drivers/net/phy/ax88796b.c`](./ax88796b.c) use kernel::{ - c_str, net::phy::{self, reg::C22, DeviceId, Driver}, prelude::*, uapi, @@ -41,7 +40,7 @@ fn asix_soft_reset(dev: &mut phy::Device) -> Result { #[vtable] impl Driver for PhyAX88772A { const FLAGS: u32 = phy::flags::IS_INTERNAL; - const NAME: &'static CStr = c_str!("Asix Electronics AX88772A"); + const NAME: &'static CStr = c"Asix Electronics AX88772A"; const PHY_DEVICE_ID: DeviceId = DeviceId::new_with_exact_mask(0x003b1861); // AX88772A is not working properly with some old switches (NETGEAR EN 108TP): @@ -105,7 +104,7 @@ fn link_change_notify(dev: &mut phy::Device) { #[vtable] impl Driver for PhyAX88772C { const FLAGS: u32 = phy::flags::IS_INTERNAL; - const NAME: &'static CStr = c_str!("Asix Electronics AX88772C"); + const NAME: &'static CStr = c"Asix Electronics AX88772C"; const PHY_DEVICE_ID: DeviceId = DeviceId::new_with_exact_mask(0x003b1881); fn suspend(dev: &mut phy::Device) -> Result { @@ -125,7 +124,7 @@ fn soft_reset(dev: &mut phy::Device) -> Result { #[vtable] impl Driver for PhyAX88796B { - const NAME: &'static CStr = c_str!("Asix Electronics AX88796B"); + const NAME: &'static CStr = c"Asix Electronics AX88796B"; const PHY_DEVICE_ID: DeviceId = DeviceId::new_with_model_mask(0x003b1841); fn soft_reset(dev: &mut phy::Device) -> Result { diff --git a/drivers/net/phy/qt2025.rs b/drivers/net/phy/qt2025.rs index 1ab065798175..2f4ba85a0d73 100644 --- a/drivers/net/phy/qt2025.rs +++ b/drivers/net/phy/qt2025.rs @@ -9,7 +9,6 @@ //! //! The QT2025 PHY integrates an Intel 8051 micro-controller. -use kernel::c_str; use kernel::error::code; use kernel::firmware::Firmware; use kernel::net::phy::{ @@ -36,7 +35,7 @@ #[vtable] impl Driver for PhyQT2025 { - const NAME: &'static CStr = c_str!("QT2025 10Gpbs SFP+"); + const NAME: &'static CStr = c"QT2025 10Gpbs SFP+"; const PHY_DEVICE_ID: phy::DeviceId = phy::DeviceId::new_with_exact_mask(0x0043a400); fn probe(dev: &mut phy::Device) -> Result<()> { @@ -69,7 +68,7 @@ fn probe(dev: &mut phy::Device) -> Result<()> { // The micro-controller will start running from the boot ROM. dev.write(C45::new(Mmd::PCS, 0xe854), 0x00c0)?; - let fw = Firmware::request(c_str!("qt2025-2.0.3.3.fw"), dev.as_ref())?; + let fw = Firmware::request(c"qt2025-2.0.3.3.fw", dev.as_ref())?; if fw.data().len() > SZ_16K + SZ_8K { return Err(code::EFBIG); } diff --git a/rust/kernel/devres.rs b/rust/kernel/devres.rs index 942376f6f3af..68af33ca2f25 100644 --- a/rust/kernel/devres.rs +++ b/rust/kernel/devres.rs @@ -45,7 +45,7 @@ struct DevresInner { /// # Example /// /// ```no_run -/// # use kernel::{bindings, c_str, device::Device, devres::Devres, io::{Io, IoRaw}}; +/// # use kernel::{bindings, device::Device, devres::Devres, io::{Io, IoRaw}}; /// # use core::ops::Deref; /// /// // See also [`pci::Bar`] for a real example. diff --git a/rust/kernel/firmware.rs b/rust/kernel/firmware.rs index c5162fdc95ff..e371df67261e 100644 --- a/rust/kernel/firmware.rs +++ b/rust/kernel/firmware.rs @@ -40,13 +40,13 @@ fn request_nowarn() -> Self { /// # Examples /// /// ```no_run -/// # use kernel::{c_str, device::Device, firmware::Firmware}; +/// # use kernel::{device::Device, firmware::Firmware}; /// /// # fn no_run() -> Result<(), Error> { /// # // SAFETY: *NOT* safe, just for the example to get an `ARef` instance /// # let dev = unsafe { Device::get_device(core::ptr::null_mut()) }; /// -/// let fw = Firmware::request(c_str!("path/to/firmware.bin"), &dev)?; +/// let fw = Firmware::request(c"path/to/firmware.bin", &dev)?; /// let blob = fw.data(); /// /// # Ok(()) diff --git a/rust/kernel/kunit.rs b/rust/kernel/kunit.rs index d858757aeace..527794dcc439 100644 --- a/rust/kernel/kunit.rs +++ b/rust/kernel/kunit.rs @@ -56,10 +56,11 @@ macro_rules! kunit_assert { break 'out; } - static NAME: &'static $crate::str::CStr = $crate::c_str!($name); - static FILE: &'static $crate::str::CStr = $crate::c_str!($file); + static NAME: &'static $crate::str::CStr = $crate::c_str_avoid_literals!($name); + static FILE: &'static $crate::str::CStr = $crate::c_str_avoid_literals!($file); static LINE: i32 = core::line!() as i32 - $diff; - static CONDITION: &'static $crate::str::CStr = $crate::c_str!(stringify!($condition)); + static CONDITION: &'static $crate::str::CStr = + $crate::c_str_avoid_literals!(stringify!($condition)); // SAFETY: FFI call without safety requirements. let kunit_test = unsafe { $crate::bindings::kunit_get_current_test() }; diff --git a/rust/kernel/net/phy.rs b/rust/kernel/net/phy.rs index 73df0f55f94e..edd03e5b8b28 100644 --- a/rust/kernel/net/phy.rs +++ b/rust/kernel/net/phy.rs @@ -780,7 +780,6 @@ const fn as_int(&self) -> u32 { /// /// ``` /// # mod module_phy_driver_sample { -/// use kernel::c_str; /// use kernel::net::phy::{self, DeviceId}; /// use kernel::prelude::*; /// @@ -799,7 +798,7 @@ const fn as_int(&self) -> u32 { /// /// #[vtable] /// impl phy::Driver for PhySample { -/// const NAME: &'static CStr = c_str!("PhySample"); +/// const NAME: &'static CStr = c"PhySample"; /// const PHY_DEVICE_ID: phy::DeviceId = phy::DeviceId::new_with_exact_mask(0x00000001); /// } /// # } @@ -808,7 +807,6 @@ const fn as_int(&self) -> u32 { /// This expands to the following code: /// /// ```ignore -/// use kernel::c_str; /// use kernel::net::phy::{self, DeviceId}; /// use kernel::prelude::*; /// @@ -828,7 +826,7 @@ const fn as_int(&self) -> u32 { /// /// #[vtable] /// impl phy::Driver for PhySample { -/// const NAME: &'static CStr = c_str!("PhySample"); +/// const NAME: &'static CStr = c"PhySample"; /// const PHY_DEVICE_ID: phy::DeviceId = phy::DeviceId::new_with_exact_mask(0x00000001); /// } /// diff --git a/rust/kernel/platform.rs b/rust/kernel/platform.rs index 50e6b0421813..99af0a16ae85 100644 --- a/rust/kernel/platform.rs +++ b/rust/kernel/platform.rs @@ -120,7 +120,7 @@ macro_rules! module_platform_driver { /// # Example /// ///``` -/// # use kernel::{bindings, c_str, of, platform}; +/// # use kernel::{bindings, of, platform}; /// /// struct MyDriver; /// @@ -129,7 +129,7 @@ macro_rules! module_platform_driver { /// MODULE_OF_TABLE, /// ::IdInfo, /// [ -/// (of::DeviceId::new(c_str!("test,device")), ()) +/// (of::DeviceId::new(c"test,device"), ()) /// ] /// ); /// diff --git a/rust/kernel/str.rs b/rust/kernel/str.rs index 13dd2f6cc572..4063d393ab58 100644 --- a/rust/kernel/str.rs +++ b/rust/kernel/str.rs @@ -273,14 +273,13 @@ pub trait CStrExt { /// # Examples /// /// ``` - /// # use kernel::c_str; /// # use kernel::fmt; /// # use kernel::str::CString; - /// let penguin = c_str!(" From patchwork Mon Feb 3 11:50:34 2025 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Tamir Duberstein X-Patchwork-Id: 13957325 Received: from mail-qk1-f176.google.com (mail-qk1-f176.google.com [209.85.222.176]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 63124204595; Mon, 3 Feb 2025 11:50:44 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.222.176 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1738583447; cv=none; b=bnbsYHhFPxW9ZT5lyESU8SluFUVs438EXhajf+9mAOImt3u1bT3kNspBO/mH1bKIFf26eNzM/4+cRyvgCe9VtqR5SdEJotXZuah0Q4CwmjN9NSglg5Eyq5EYyw2ajRyaJI14nfKjKbj9ONoErsujjZPWsdi3K5g/5ZRNQO+U7QY= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1738583447; c=relaxed/simple; bh=nJjGbI+i44AF84wr+bPqJWqg+qMzA1uFeGrVzZ/lovg=; h=From:Date:Subject:MIME-Version:Content-Type:Message-Id:References: In-Reply-To:To:Cc; b=BPYTnvwcdvPh0+quM7gQVP0hjC6U6TF9XAKDmbDbliuRi7Y423I6qAByDrbnPhnrG0vd91ENZ/FDR7Bk1HwWYhBcdlM9L7H6FPzON+N3biQeJaYFqsFG7p1bKaR97wanalMRwL5a7F8G+Y27En91KLhLFi/bCeqDd+QjCf2s+Qo= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=gmail.com; spf=pass smtp.mailfrom=gmail.com; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b=jCX2xhmE; arc=none smtp.client-ip=209.85.222.176 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=gmail.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=gmail.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="jCX2xhmE" Received: by mail-qk1-f176.google.com with SMTP id af79cd13be357-7be6fdeee35so683893285a.1; Mon, 03 Feb 2025 03:50:44 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20230601; t=1738583443; x=1739188243; darn=vger.kernel.org; h=cc:to:in-reply-to:references:message-id:content-transfer-encoding :mime-version:subject:date:from:from:to:cc:subject:date:message-id :reply-to; bh=m30iBY4645YJh/LJ4nLB0jzg5cRUyI/d+hKLHrROYGI=; b=jCX2xhmEGGvoaA3ctq09o6jghXtfPY88qE0cUScUB8TQcTbYulbko0loA8RUsMojVt CJ7XZF+UpkyTh5lk6BdvjW3z6kvMz3jkPNCqCF0Vz9c7X59wzWEHsMHQboRAqWaPxkJL sJDEpla50TEdHRXVEOeAxJoA5oOmsafTPsNxYRX1jUr8sAZ+iDYQVud19LZHFlT1nw7p +xsBaZ0jMuGBHT8udjDk0ILJuVJmJb609MCrFAwhTgsQ9J95IQUS+kAZa9WhdYwrJ9Pm wlOGjsrdMKk8jFMYSPZIfnw/TO8AfKXBL2L3wSPz3RLGjNlSlsVb7rzaTtBJ2L2kpRjd 1TlQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1738583443; x=1739188243; h=cc:to:in-reply-to:references:message-id:content-transfer-encoding :mime-version:subject:date:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=m30iBY4645YJh/LJ4nLB0jzg5cRUyI/d+hKLHrROYGI=; b=Gp0pQqhJatBZX4wai2oxSoM9hmYsYZUfSkL1tepWFya1/igKNr1FSVFGrmX7YBcuHy DaimnK33APR2Q/S7ZEDf+VtG3zCzdek1H9Xf3KZvTdYYBKSrZCErApuQXWsudnV9PLk+ EN8lMzKEwniUluNPOaCTHsF5zw1GPXNI+JOGhU0KUOPvIy0IvuEglR2MJriYNEp8aPov 2QXlZ4wuHNEOd3dcp/KqyCC0zHH8frRQz888Rte2NX/wmxXSX2xuZu+5E5CoEh/Nxp0W HjIvsN2+z5nJPcFItAK6jUVBSeqE1haHDEySHvNEis5R10gXPeY9oxwRg+Wm1gmB6OBF Pwpw== X-Forwarded-Encrypted: i=1; AJvYcCVDYDU3g7/BUvsKUNZ4hx8c1WHSgMiZQK+iV5oqfc4IsprddqATv6UctpVsxBScMq83SP7/7NEJ4mGiPkw=@vger.kernel.org X-Gm-Message-State: AOJu0YzC/vNTJpvgGO7jdrn3cicFIq54LSKKDZQGUr14J9H6XqmqRTys 2V2lqOVwJYE0RLAs7X3Uvh/UFII8l55XrZOKAG2t9ifzOzz27fX8 X-Gm-Gg: ASbGncsox25H2INNhKBZOu35LSrZOmG3buaz9t1QQHVkTvr+x3rw+Jsd8yem6+B5Mdi tG7pz4UghdwsXnQWSKMFwhx49iebN4RhBpxE5bj2ej7xz3kdij7a2Kli4u1UUDQLedlxJgCX6B9 xq+p1AdjLhpNDQsnq/EsWpOyP4EftjJ9Sx2xLYfdjlnizXBt5z0DFQBValNbTCMOWg6tuivVLOz MHMxeHFS0yFncV6eYQd2MpqoiPJurCyI9yRlwSvPeguuvTPnA2ixAlQ650uUgb+q5CNGYL5Kqi+ lfpTHci5sxApuXPXrM0R9OPUpC5I+tXZOMkI9+o= X-Google-Smtp-Source: AGHT+IFsebOfHASDKeppMR0nu0gc9+UOj5NfbSSaaWKDzLbwzE/DjaJ+i7tcaG3Hz5m8SymVO0kASQ== X-Received: by 2002:a05:6214:dcb:b0:6e0:f451:2e22 with SMTP id 6a1803df08f44-6e243c7fa66mr361296376d6.38.1738583443042; Mon, 03 Feb 2025 03:50:43 -0800 (PST) Received: from tamird-mac.local ([2600:4041:5be7:7c00:f07f:fb14:288d:6f1e]) by smtp.gmail.com with ESMTPSA id 6a1803df08f44-6e254835641sm49537626d6.62.2025.02.03.03.50.41 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 03 Feb 2025 03:50:41 -0800 (PST) From: Tamir Duberstein Date: Mon, 03 Feb 2025 06:50:34 -0500 Subject: [PATCH v8 4/4] rust: remove core::ffi::CStr reexport Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Message-Id: <20250203-cstr-core-v8-4-cb3f26e78686@gmail.com> References: <20250203-cstr-core-v8-0-cb3f26e78686@gmail.com> In-Reply-To: <20250203-cstr-core-v8-0-cb3f26e78686@gmail.com> To: Michal Rostecki , Miguel Ojeda , Alex Gaynor , Boqun Feng , Gary Guo , =?utf-8?q?Bj=C3=B6rn_Roy_Baron?= , Benno Lossin , Andreas Hindborg , Alice Ryhl , Trevor Gross Cc: rust-for-linux@vger.kernel.org, linux-kernel@vger.kernel.org, Tamir Duberstein X-Mailer: b4 0.15-dev Clean up references to `kernel::str::CStr`. Signed-off-by: Tamir Duberstein --- rust/kernel/device.rs | 3 +-- rust/kernel/driver.rs | 4 ++-- rust/kernel/error.rs | 6 ++---- rust/kernel/firmware.rs | 3 ++- rust/kernel/kunit.rs | 6 +++--- rust/kernel/lib.rs | 2 +- rust/kernel/miscdevice.rs | 3 +-- rust/kernel/of.rs | 3 ++- rust/kernel/pci.rs | 3 +-- rust/kernel/platform.rs | 3 +-- rust/kernel/prelude.rs | 5 +---- rust/kernel/str.rs | 19 +++++++++---------- rust/kernel/sync/condvar.rs | 3 ++- rust/kernel/sync/lock.rs | 4 ++-- rust/kernel/sync/lock/global.rs | 5 +++-- rust/kernel/sync/poll.rs | 1 + rust/kernel/workqueue.rs | 1 + rust/macros/module.rs | 2 +- 18 files changed, 36 insertions(+), 40 deletions(-) diff --git a/rust/kernel/device.rs b/rust/kernel/device.rs index df4bfa5f51ea..a1123206819b 100644 --- a/rust/kernel/device.rs +++ b/rust/kernel/device.rs @@ -6,10 +6,9 @@ use crate::{ bindings, - str::CStr, types::{ARef, Opaque}, }; -use core::{fmt, ptr}; +use core::{ffi::CStr, fmt, ptr}; #[cfg(CONFIG_PRINTK)] use crate::str::CStrExt as _; diff --git a/rust/kernel/driver.rs b/rust/kernel/driver.rs index 2a16d5e64e6c..0fbcdc226729 100644 --- a/rust/kernel/driver.rs +++ b/rust/kernel/driver.rs @@ -6,8 +6,8 @@ //! register using the [`Registration`] class. use crate::error::{Error, Result}; -use crate::{device, init::PinInit, of, str::CStr, try_pin_init, types::Opaque, ThisModule}; -use core::pin::Pin; +use crate::{device, init::PinInit, of, try_pin_init, types::Opaque, ThisModule}; +use core::{ffi::CStr, pin::Pin}; use macros::{pin_data, pinned_drop}; /// The [`RegistrationOps`] trait serves as generic interface for subsystems (e.g., PCI, Platform, diff --git a/rust/kernel/error.rs b/rust/kernel/error.rs index cff9204d9dd6..aa0786cee048 100644 --- a/rust/kernel/error.rs +++ b/rust/kernel/error.rs @@ -4,11 +4,9 @@ //! //! C header: [`include/uapi/asm-generic/errno-base.h`](srctree/include/uapi/asm-generic/errno-base.h) -use crate::{ - alloc::{layout::LayoutError, AllocError}, - str::CStr, -}; +use crate::alloc::{layout::LayoutError, AllocError}; +use core::ffi::CStr; use core::fmt; use core::num::NonZeroI32; use core::num::TryFromIntError; diff --git a/rust/kernel/firmware.rs b/rust/kernel/firmware.rs index e371df67261e..73eaa477756a 100644 --- a/rust/kernel/firmware.rs +++ b/rust/kernel/firmware.rs @@ -4,7 +4,8 @@ //! //! C header: [`include/linux/firmware.h`](srctree/include/linux/firmware.h) -use crate::{bindings, device::Device, error::Error, error::Result, str::CStr}; +use crate::{bindings, device::Device, error::Error, error::Result}; +use core::ffi::CStr; use core::ptr::NonNull; /// # Invariants diff --git a/rust/kernel/kunit.rs b/rust/kernel/kunit.rs index 527794dcc439..f4e0e58877a0 100644 --- a/rust/kernel/kunit.rs +++ b/rust/kernel/kunit.rs @@ -56,10 +56,10 @@ macro_rules! kunit_assert { break 'out; } - static NAME: &'static $crate::str::CStr = $crate::c_str_avoid_literals!($name); - static FILE: &'static $crate::str::CStr = $crate::c_str_avoid_literals!($file); + static NAME: &'static core::ffi::CStr = $crate::c_str_avoid_literals!($name); + static FILE: &'static core::ffi::CStr = $crate::c_str_avoid_literals!($file); static LINE: i32 = core::line!() as i32 - $diff; - static CONDITION: &'static $crate::str::CStr = + static CONDITION: &'static core::ffi::CStr = $crate::c_str_avoid_literals!(stringify!($condition)); // SAFETY: FFI call without safety requirements. diff --git a/rust/kernel/lib.rs b/rust/kernel/lib.rs index 496ed32b0911..a129ef3292dc 100644 --- a/rust/kernel/lib.rs +++ b/rust/kernel/lib.rs @@ -132,7 +132,7 @@ fn init(module: &'static ThisModule) -> impl init::PinInit { /// Metadata attached to a [`Module`] or [`InPlaceModule`]. pub trait ModuleMetadata { /// The name of the module as specified in the `module!` macro. - const NAME: &'static crate::str::CStr; + const NAME: &'static core::ffi::CStr; } /// Equivalent to `THIS_MODULE` in the C API. diff --git a/rust/kernel/miscdevice.rs b/rust/kernel/miscdevice.rs index 78c150270080..6e6f70cb4981 100644 --- a/rust/kernel/miscdevice.rs +++ b/rust/kernel/miscdevice.rs @@ -16,10 +16,9 @@ fs::File, prelude::*, seq_file::SeqFile, - str::CStr, types::{ForeignOwnable, Opaque}, }; -use core::{marker::PhantomData, mem::MaybeUninit, pin::Pin}; +use core::{ffi::CStr, marker::PhantomData, mem::MaybeUninit, pin::Pin}; /// Options for creating a misc device. #[derive(Copy, Clone)] diff --git a/rust/kernel/of.rs b/rust/kernel/of.rs index 12ea65df46de..087ac8e05551 100644 --- a/rust/kernel/of.rs +++ b/rust/kernel/of.rs @@ -2,7 +2,8 @@ //! Device Tree / Open Firmware abstractions. -use crate::{bindings, device_id::RawDeviceId, prelude::*}; +use crate::{bindings, device_id::RawDeviceId}; +use core::ffi::CStr; /// IdTable type for OF drivers. pub type IdTable = &'static dyn kernel::device_id::IdTable; diff --git a/rust/kernel/pci.rs b/rust/kernel/pci.rs index 4c98b5b9aa1e..bec5b6bcb696 100644 --- a/rust/kernel/pci.rs +++ b/rust/kernel/pci.rs @@ -13,11 +13,10 @@ error::{to_result, Result}, io::Io, io::IoRaw, - str::CStr, types::{ARef, ForeignOwnable, Opaque}, ThisModule, }; -use core::{ops::Deref, ptr::addr_of_mut}; +use core::{ffi::CStr, ops::Deref, ptr::addr_of_mut}; use kernel::prelude::*; /// An adapter for the registration of PCI drivers. diff --git a/rust/kernel/platform.rs b/rust/kernel/platform.rs index 99af0a16ae85..173eaeb90fb4 100644 --- a/rust/kernel/platform.rs +++ b/rust/kernel/platform.rs @@ -9,12 +9,11 @@ error::{to_result, Result}, of, prelude::*, - str::CStr, types::{ARef, ForeignOwnable, Opaque}, ThisModule, }; -use core::ptr::addr_of_mut; +use core::{ffi::CStr, ptr::addr_of_mut}; /// An adapter for the registration of platform drivers. pub struct Adapter(T); diff --git a/rust/kernel/prelude.rs b/rust/kernel/prelude.rs index 96e7029c27da..21fa7b3a68c3 100644 --- a/rust/kernel/prelude.rs +++ b/rust/kernel/prelude.rs @@ -34,10 +34,7 @@ pub use super::error::{code::*, Error, Result}; -pub use super::{ - str::{CStr, CStrExt as _}, - ThisModule, -}; +pub use super::{str::CStrExt as _, ThisModule}; pub use super::init::{InPlaceInit, InPlaceWrite, Init, PinInit}; diff --git a/rust/kernel/str.rs b/rust/kernel/str.rs index 4063d393ab58..d25c3d698f25 100644 --- a/rust/kernel/str.rs +++ b/rust/kernel/str.rs @@ -3,6 +3,7 @@ //! String representations. use crate::alloc::{flags::*, AllocError, KVec}; +use core::ffi::CStr; use core::fmt::{self, Write}; use core::ops::{Deref, DerefMut}; @@ -177,8 +178,6 @@ macro_rules! b_str { }}; } -pub use core::ffi::CStr; - /// Returns a C pointer to the string. // It is a free function rather than a method on an extension trait because: // @@ -381,7 +380,7 @@ fn as_ref(&self) -> &BStr { /// /// ``` /// # use kernel::c_str_avoid_literals; -/// # use kernel::str::CStr; +/// # use core::ffi::CStr; /// const MY_CSTR: &CStr = c_str_avoid_literals!(concat!(file!(), ":", line!(), ": My CStr!")); /// ``` #[macro_export] @@ -391,13 +390,13 @@ macro_rules! c_str_avoid_literals { // too limiting to macro authors, so we rely on the name as a hint instead. ($str:expr) => {{ const S: &'static str = concat!($str, "\0"); - const C: &'static $crate::str::CStr = - match $crate::str::CStr::from_bytes_with_nul(S.as_bytes()) { - Ok(v) => v, - Err(core::ffi::FromBytesWithNulError { .. }) => { - panic!("string contains interior NUL") - } - }; + const C: &'static core::ffi::CStr = match core::ffi::CStr::from_bytes_with_nul(S.as_bytes()) + { + Ok(v) => v, + Err(core::ffi::FromBytesWithNulError { .. }) => { + panic!("string contains interior NUL") + } + }; C }}; } diff --git a/rust/kernel/sync/condvar.rs b/rust/kernel/sync/condvar.rs index 7901aa040f0e..b23544e24a0e 100644 --- a/rust/kernel/sync/condvar.rs +++ b/rust/kernel/sync/condvar.rs @@ -10,11 +10,12 @@ ffi::{c_int, c_long}, init::PinInit, pin_init, - str::{CStr, CStrExt as _}, + str::CStrExt as _, task::{MAX_SCHEDULE_TIMEOUT, TASK_INTERRUPTIBLE, TASK_NORMAL, TASK_UNINTERRUPTIBLE}, time::Jiffies, types::Opaque, }; +use core::ffi::CStr; use core::marker::PhantomPinned; use core::ptr; use macros::pin_data; diff --git a/rust/kernel/sync/lock.rs b/rust/kernel/sync/lock.rs index 37f1a6a53b12..711773c877cc 100644 --- a/rust/kernel/sync/lock.rs +++ b/rust/kernel/sync/lock.rs @@ -9,10 +9,10 @@ use crate::{ init::PinInit, pin_init, - str::{CStr, CStrExt as _}, + str::CStrExt as _, types::{NotThreadSafe, Opaque, ScopeGuard}, }; -use core::{cell::UnsafeCell, marker::PhantomPinned}; +use core::{cell::UnsafeCell, ffi::CStr, marker::PhantomPinned}; use macros::pin_data; pub mod mutex; diff --git a/rust/kernel/sync/lock/global.rs b/rust/kernel/sync/lock/global.rs index 4a040c29faee..7d6d1abf9279 100644 --- a/rust/kernel/sync/lock/global.rs +++ b/rust/kernel/sync/lock/global.rs @@ -5,13 +5,14 @@ //! Support for defining statics containing locks. use crate::{ - str::{CStr, CStrExt as _}, + str::CStrExt as _, sync::lock::{Backend, Guard, Lock}, sync::{LockClassKey, LockedBy}, types::Opaque, }; use core::{ cell::UnsafeCell, + ffi::CStr, marker::{PhantomData, PhantomPinned}, }; @@ -266,7 +267,7 @@ macro_rules! global_lock { $pub enum $name {} impl $crate::sync::lock::GlobalLockBackend for $name { - const NAME: &'static $crate::str::CStr = + const NAME: &'static core::ffi::CStr = $crate::c_str_avoid_literals!(::core::stringify!($name)); type Item = $valuety; type Backend = $crate::global_lock_inner!(backend $kind); diff --git a/rust/kernel/sync/poll.rs b/rust/kernel/sync/poll.rs index d5f17153b424..3349f48725f2 100644 --- a/rust/kernel/sync/poll.rs +++ b/rust/kernel/sync/poll.rs @@ -11,6 +11,7 @@ sync::{CondVar, LockClassKey}, types::Opaque, }; +use core::ffi::CStr; use core::ops::Deref; /// Creates a [`PollCondVar`] initialiser with the given name and a newly-created lock class. diff --git a/rust/kernel/workqueue.rs b/rust/kernel/workqueue.rs index 0cd100d2aefb..25723207c2be 100644 --- a/rust/kernel/workqueue.rs +++ b/rust/kernel/workqueue.rs @@ -135,6 +135,7 @@ use crate::alloc::{AllocError, Flags}; use crate::{prelude::*, sync::Arc, sync::LockClassKey, types::Opaque}; +use core::ffi::CStr; use core::marker::PhantomData; /// Creates a [`Work`] initialiser with the given name and a newly-created lock class. diff --git a/rust/macros/module.rs b/rust/macros/module.rs index a534fabd29d6..7f81cbbcc4ef 100644 --- a/rust/macros/module.rs +++ b/rust/macros/module.rs @@ -229,7 +229,7 @@ pub(crate) fn module(ts: TokenStream) -> TokenStream { }}; impl kernel::ModuleMetadata for {type_} {{ - const NAME: &'static kernel::str::CStr = c\"{name}\"; + const NAME: &'static core::ffi::CStr = c\"{name}\"; }} // Double nested modules, since then nobody can access the public items inside.