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 A361C346AE3; Wed, 22 Apr 2026 23:30:36 +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=1776900636; cv=none; b=uc1QXqXP+wUQ4kZ5wDH0dxpYxZFjKkSNNwXCCra0sqEpkOIIJ2tBbpXY7Ueu2EJeeIFzv0efH7oOR9pc7DOYB9IuLSlxeVpO/0yekCylrEpnEY5e+U0yVNCKxRXTohFczeTI+i0XjKqq9PJU2lMb4DdDKWfbxpgO+9PzjUhzFHA= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1776900636; c=relaxed/simple; bh=jXYqYekRjpF07wlPDKgx2XWDNqQtTHKbLiod79qFffg=; h=From:Date:Subject:MIME-Version:Content-Type:Message-Id:References: In-Reply-To:To:Cc; b=i/Y1Ke2j78QI0TpcwGN0IMPOzqMyoih7FBLJVGfmPvH0iIlawr/AJgVhltmfwIJWrbubfiDW+8C+NUFNz3mRYjhkiG3kn09El14f2WhYFL4CiGH5k1mg83u49ej6KIp9otq8e7im6PokvgxU+/GJgh0UF80dpR72BcykivS0pwA= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=usCmrLv+; 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="usCmrLv+" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 1CA2DC2BCAF; Wed, 22 Apr 2026 23:30:34 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1776900636; bh=jXYqYekRjpF07wlPDKgx2XWDNqQtTHKbLiod79qFffg=; h=From:Date:Subject:References:In-Reply-To:To:Cc:From; b=usCmrLv+N705MyXz9QrB8eUi0cUHCIrvFrfNer91Gkil+ZqSe+Uv+mIqL5GktgtFe TjOetSwCQZv+swwRMS72YUTtt9dUGzzlgHD1ppcULa0xQs4RMgPyaJbjvzBZYhSnYq /wFPNefAUCoXjT2xQu7sMk8H5p6E0tyMmqLovYSHiVmrqxVxT9yZGftM7cBHo4NinI /nylz9us8rVzQ2+5u+EJ3ki6J7om5kmWngFJlndHlTasQhfiy2xaZ4ppFhoxGbQKG9 AnANcz94N16eJCPW5f579E20MrlPSYW5hGmP3x2x8SrTK8kBfipy9A6ZLdvD9+Cq6D xtdDBTMwMl5Ng== From: Chuck Lever Date: Wed, 22 Apr 2026 19:30:02 -0400 Subject: [PATCH v9 08/17] ext4: Report case sensitivity in fileattr_get 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: <20260422-case-sensitivity-v9-8-be023cc070e2@oracle.com> References: <20260422-case-sensitivity-v9-0-be023cc070e2@oracle.com> In-Reply-To: <20260422-case-sensitivity-v9-0-be023cc070e2@oracle.com> To: Al Viro , Christian Brauner , Jan Kara Cc: linux-fsdevel@vger.kernel.org, linux-ext4@vger.kernel.org, linux-xfs@vger.kernel.org, linux-cifs@vger.kernel.org, linux-nfs@vger.kernel.org, linux-api@vger.kernel.org, linux-f2fs-devel@lists.sourceforge.net, hirofumi@mail.parknet.co.jp, linkinjeon@kernel.org, sj1557.seo@samsung.com, yuezhang.mo@sony.com, almaz.alexandrovich@paragon-software.com, slava@dubeyko.com, glaubitz@physik.fu-berlin.de, frank.li@vivo.com, tytso@mit.edu, adilger.kernel@dilger.ca, cem@kernel.org, sfrench@samba.org, pc@manguebit.org, ronniesahlberg@gmail.com, sprasad@microsoft.com, trondmy@kernel.org, anna@kernel.org, jaegeuk@kernel.org, chao@kernel.org, hansg@kernel.org, senozhatsky@chromium.org, Chuck Lever X-Mailer: b4 0.16-dev X-Developer-Signature: v=1; a=openpgp-sha256; l=1149; i=chuck.lever@oracle.com; h=from:subject:message-id; bh=TxMd9+19zfe1kcd7z7IWDwky99GfiXSk/tT0Rl2ZM5c=; b=owEBbQKS/ZANAwAKATNqszNvZn+XAcsmYgBp6VoFTp3fLxE8PITfxUL7bNrVobvHogZfU1OlZ pifqDEyrSWJAjMEAAEKAB0WIQQosuWwEobfJDzyPv4zarMzb2Z/lwUCaelaBQAKCRAzarMzb2Z/ l5T9D/96IYMw2tXU48HaQ7/wBu/lmh6O/uthEswp4B3E8zUUOZxJEKKCesvcbZ/FPTIZrz6UIC7 SFZNP4CtwF7mTNW0vhhKzFeM0BNnWfqxfW6TMHfeH2Qsx8RpFIupMQTFy+3vhwe7C8DtI4fdBQt KuYkZ8lkPr0G553naFj2d1hTsPGUmsJw5oZLcOcO578GvDJGDbuKZszGbjbOtsrI4Pp0nAdAzaN aJhTDHyvFq34U1NEJErK/floRT9eHqpvvjCO2lYLSmvH2Vu/B2C97+sm7As7hNg1piuL/Y3Looh N9J1JXeihuV4fSKG0jhE1apayyNxr5UYwqMvpBmP2psp44JYk0Ghf+72TLltpgiMXJu43PUqNs1 0Sx46M+sQlhOQY9PJD7VM7cwFLTL1ClWHCmeRUeiA1BAocO1DKDqISuSJRwJbNd/bFbKFK4jaWs DDV4ki4Urn91xwjvCDNV6cp6h3btk9OSgzm1ZMtvNIQuDunB3G9KH3Kggi2/Nc3jdvjbIOgFOPA VvNZxBTTcP05GaxBa2Ux0CyTCpxRtJdgcrwxDLwl44HaCsMSHJ+YVL+/d3q3pk/fkEGDVGZ79rY H5465ibEnCmyFesdM/qK7r057UwKAfoqbRP9cDAYiYLgajXD2D+bJatDIgwaX3+ZENYSHC0cMmz jRnC0nP6nYek2bg== X-Developer-Key: i=chuck.lever@oracle.com; a=openpgp; fpr=28B2E5B01286DF243CF23EFE336AB3336F667F97 From: Chuck Lever Report ext4's case sensitivity behavior via the FS_XFLAG_CASEFOLD flag. ext4 always preserves case at rest. Case sensitivity is a per-directory setting in ext4. If the queried inode is a casefolded directory, report case-insensitive; otherwise report case-sensitive (standard POSIX behavior). Reviewed-by: Jan Kara Acked-by: Theodore Ts'o Signed-off-by: Chuck Lever --- fs/ext4/ioctl.c | 7 +++++++ 1 file changed, 7 insertions(+) diff --git a/fs/ext4/ioctl.c b/fs/ext4/ioctl.c index 1d0c3d4bdf47..d1d597a13eeb 100644 --- a/fs/ext4/ioctl.c +++ b/fs/ext4/ioctl.c @@ -999,6 +999,13 @@ int ext4_fileattr_get(struct dentry *dentry, struct file_kattr *fa) if (ext4_has_feature_project(inode->i_sb)) fa->fsx_projid = from_kprojid(&init_user_ns, ei->i_projid); + /* + * Case folding is a directory attribute in ext4. Set FS_XFLAG_CASEFOLD + * for directories with the casefold attribute; all other inodes use + * standard case-sensitive semantics. + */ + if (IS_CASEFOLDED(inode)) + fa->fsx_xflags |= FS_XFLAG_CASEFOLD; return 0; } -- 2.53.0