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 2D7352EFDA0; Tue, 4 Nov 2025 12:12:40 +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=1762258361; cv=none; b=ueza7Jbh9TTycl0yetsKSqp/CDjHfVpiaZ5qivwz6t3cK2J8WPjmVQ6aTSH3OKlomuN3KBhpdziOk4MgOh51m9f4CNWuTfMR1Hx8zCfxrZ7c1NB2jdQMPTv7DFPCInGJUhhxO3WgUrmPvwAKqM8lMCDS9HPc8OvpBihMtLzokp4= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1762258361; c=relaxed/simple; bh=R9BumAJaVt8SSfVFac0I71M+gKfDkpFXl4eTAQt6ZqY=; h=From:Date:Subject:MIME-Version:Content-Type:Message-Id:References: In-Reply-To:To:Cc; b=i9hMfnRuxX/JIFe3yUzhKyVrhLLMBLuf5cYMuQoxhQYdkxhfVoH59jkHiK5dVR5UYIn3emOKinoUeaya3xWOYA+51Vxe3iTRX+iW1cn5rJ4c0KUwoUcCsJsCDbfSBScYYOWO95wH+j79jq5uuw7OVowo9JRH3FiEugqutt2X/vk= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=i4tghsQD; 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="i4tghsQD" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 3043EC116B1; Tue, 4 Nov 2025 12:12:39 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1762258360; bh=R9BumAJaVt8SSfVFac0I71M+gKfDkpFXl4eTAQt6ZqY=; h=From:Date:Subject:References:In-Reply-To:To:Cc:From; b=i4tghsQDIVg9EBaaogHhvz22ThJT9+YaRKsNZPaNGHtwYFTzwEvxOiG1Yc2y4hEaZ kB86BDZejeuTlN51EzpBPKckHJIVP5S2E5P/VjFCCEeOzZoE4FZvhysXoALJl64Oqi S9c8r65Vw95AN/079zaTXCG5AtlUJ8pl3aAGM3tpFLxUd+xlb4LpZmFU3UTkyZgZ2u xo6MHpFmbsnPcgHUv4UqOA1edE/IiJkp9S5tOWRnA/kHvBvtHQDNfRtn/rWETm5qnx 1/mqiMOQ1rWpI5Fx+/JOUkBNGumxe+HyPjYYZOBndnHOyXyIIpDTl6bkNlkeXNeHp6 w2XiQ+ACGSXag== From: Christian Brauner Date: Tue, 04 Nov 2025 13:12:30 +0100 Subject: [PATCH RFC 1/8] fs: add super_write_guard Precedence: bulk X-Mailing-List: linux-fsdevel@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: <20251104-work-guards-v1-1-5108ac78a171@kernel.org> References: <20251104-work-guards-v1-0-5108ac78a171@kernel.org> In-Reply-To: <20251104-work-guards-v1-0-5108ac78a171@kernel.org> To: linux-fsdevel@vger.kernel.org Cc: Alexander Viro , Jan Kara , linux-btrfs@vger.kernel.org, linux-ext4@vger.kernel.org, linux-xfs@vger.kernel.org, Christian Brauner X-Mailer: b4 0.15-dev-a6db3 X-Developer-Signature: v=1; a=openpgp-sha256; l=664; i=brauner@kernel.org; h=from:subject:message-id; bh=R9BumAJaVt8SSfVFac0I71M+gKfDkpFXl4eTAQt6ZqY=; b=owGbwMvMwCU28Zj0gdSKO4sYT6slMWRyvt1i11e4tOq+15XbDXOm+Qt2TNJdpFp4JeHyLQWOW 4wO1p8aOkpZGMS4GGTFFFkc2k3C5ZbzVGw2ytSAmcPKBDKEgYtTACZi1sPwP/2qpNEp9tc2Dv2G Hb/lrtxay/lCP/br/E+Cgtd3XhWq92Fk6K1faJjLvsTZc+8n27TI61JxiYUddxZ6603ePe3Jkqc XeAE= X-Developer-Key: i=brauner@kernel.org; a=openpgp; fpr=4880B8C9BD0E5106FC070F4F7B3C391EFEA93624 Signed-off-by: Christian Brauner --- include/linux/fs.h | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/include/linux/fs.h b/include/linux/fs.h index c895146c1444..9d403c00fbf3 100644 --- a/include/linux/fs.h +++ b/include/linux/fs.h @@ -2052,6 +2052,11 @@ static inline void sb_start_write(struct super_block *sb) __sb_start_write(sb, SB_FREEZE_WRITE); } +DEFINE_GUARD(super_write, + struct super_block *, + sb_start_write(_T), + sb_end_write(_T)) + static inline bool sb_start_write_trylock(struct super_block *sb) { return __sb_start_write_trylock(sb, SB_FREEZE_WRITE); -- 2.47.3