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 97CCB2F6166; Tue, 4 Nov 2025 12:12:53 +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=1762258373; cv=none; b=kI7jb9slT6oA0U8vYmUzuygFx6/eN0EuZ8aL7+uQhtkJWrhd8oB5DGmhBq6ocMkNnODu8dcH0ke60vLinaC9RzdUEjMXxS3eH3eXJSJkYG/lTL/LU24nzJ2h7N7LanhFSbW8H6hadX0XvQi/iAbqXnbJHPgQFXypI1YwZfWeW50= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1762258373; c=relaxed/simple; bh=j43u69lY2L8m7hBFsetpVJRhjSFaP4gqX0tweq1oFtg=; h=From:Date:Subject:MIME-Version:Content-Type:Message-Id:References: In-Reply-To:To:Cc; b=F923KcBIEj+2jjqnjYN6fMCqAAlvuFf3Cli8iDD1qJUrGAVIDz8314ep2aMx+6d7z0QNHgTSmmm7UShmqTcE8TKBQhci68RZzN4vViFCoezy7leNC6+YG5SWZHedxaQWRV/cD8nXcvjYfFo71wre1Zx0xG+7tqvR1r+B8rSpZRk= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=lL0TEYpk; 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="lL0TEYpk" Received: by smtp.kernel.org (Postfix) with ESMTPSA id DB53AC116C6; Tue, 4 Nov 2025 12:12:51 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1762258373; bh=j43u69lY2L8m7hBFsetpVJRhjSFaP4gqX0tweq1oFtg=; h=From:Date:Subject:References:In-Reply-To:To:Cc:From; b=lL0TEYpkshL4ahHy+WhlA4T61e/VYgxMpKs4GyEdB+u8us+M6Jlh4b4ahACR8pDLk zBNWIYpjqcgXrTYVDIEFMdQ+0LvIJyUE4+Emm1JRpEmsMgm3jrW78qMou5aJ/HNSc3 7Ckau+7P9Do39PNMNAL9DYtFBYnyRZdlV/Cyq9f2pnGYefx+r4tSSVsMB+GvbzpcUr zL3o3jQus5IYN+C0es9XdDE/6S6cKbeved6kiSIPe44KKi/31m7tBLKnmE6y/3IM7j Rhh/pocyqHE+bXJio2k+cxZqEUXDGIAiN9YTj1B9MnihQFeRQpvmhPsPyz3tR/cccC t9c3t1/S8bGPA== From: Christian Brauner Date: Tue, 04 Nov 2025 13:12:36 +0100 Subject: [PATCH RFC 7/8] open: use super write guard in do_ftruncate() 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-v1-7-5108ac78a171@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=784; i=brauner@kernel.org; h=from:subject:message-id; bh=j43u69lY2L8m7hBFsetpVJRhjSFaP4gqX0tweq1oFtg=; b=owGbwMvMwCU28Zj0gdSKO4sYT6slMWRyvt3C7/WZq/Ll2vm9LzWaD4b+71JcZuL9nJflkbthn fbS5yw5HaUsDGJcDLJiiiwO7Sbhcst5KjYbZWrAzGFlAhnCwMUpABPxFmT4n3Dqz81Y7ll/7s/Z 63gy48oU0RT9xrPKTQf+fVXqvJTkzsPIcNTrBtMb3uqbDRNvTC2qmiOjVW1nHDrRv4Zp21KFFmN 2fgA= X-Developer-Key: i=brauner@kernel.org; a=openpgp; fpr=4880B8C9BD0E5106FC070F4F7B3C391EFEA93624 Signed-off-by: Christian Brauner --- fs/open.c | 9 +++------ 1 file changed, 3 insertions(+), 6 deletions(-) diff --git a/fs/open.c b/fs/open.c index 3d64372ecc67..1d73a17192da 100644 --- a/fs/open.c +++ b/fs/open.c @@ -191,12 +191,9 @@ int do_ftruncate(struct file *file, loff_t length, int small) if (error) return error; - sb_start_write(inode->i_sb); - error = do_truncate(file_mnt_idmap(file), dentry, length, - ATTR_MTIME | ATTR_CTIME, file); - sb_end_write(inode->i_sb); - - return error; + scoped_guard(super_write, inode->i_sb) + return do_truncate(file_mnt_idmap(file), dentry, length, + ATTR_MTIME | ATTR_CTIME, file); } int do_sys_ftruncate(unsigned int fd, loff_t length, int small) -- 2.47.3