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 876CA3EF0BF; Thu, 23 Apr 2026 13:12:42 +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=1776949962; cv=none; b=ZUGuzim4IUdy3iurWcM2fJ1A9RQjGRWfBGRkE9E3UceWTDYb5RtxsJZZu1H3VE6ruuPVOTUgVo2DlFp/prfE3d8gobOBkOsCGZMF71NCAgExc03jzPcW6+MHFsEhy5w1IZjkXQIaidy4h3HSfJZoMwxNsGQwkuqekXJxPJBnjC8= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1776949962; c=relaxed/simple; bh=jXYqYekRjpF07wlPDKgx2XWDNqQtTHKbLiod79qFffg=; h=From:Date:Subject:MIME-Version:Content-Type:Message-Id:References: In-Reply-To:To:Cc; b=p3SIo1r+FsUNfxFFMvP+VwjTDnU/DfH2o7MhyfmyTuqESXRl4+OJ9CAPZ8hPR0VsLWv7eAR0Vk24gawyid/FcjjxmIc4VY4V4OFvg+sWZNaG07CXD3P/q9RDpuLggLt2JW0/GpVaFDQ30KyGpbHYCjUsN/ID2UaoTUTbta9YRTE= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=XC3zMZ8G; 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="XC3zMZ8G" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 3111DC2BCB4; Thu, 23 Apr 2026 13:12:40 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1776949962; bh=jXYqYekRjpF07wlPDKgx2XWDNqQtTHKbLiod79qFffg=; h=From:Date:Subject:References:In-Reply-To:To:Cc:From; b=XC3zMZ8GXEPAPGuVPkpcEGJW/IWUfO9lT5X+da8jeEzG30DrtLhAa90rUVt9Gnx3h Yh7AnsqQoxVGIIhqTnnZbWpcjwN3ItAVSTFp8tiMrIJUWfD4R9OStiy0ZNAyId4XMw d2Z2L5hccCmf7zAV3nqUUdvoQprKmbcKdlOAgW40hdZuQX5OaPfH+A6rab0OZGvDox aDv0P/ZQd9E8C+/Pwl8FA05S6P2NtFlWHsLB8dFv7bB7fMTkseIbph+4Tjrtxq6euV wCsCmNbnex9K3PvwvS3S8q9VkGxuvMVnUOLmsezHOVvd1EDzUUpalew7yOLN8BACBt IegZt8Hz3IuLA== From: Chuck Lever Date: Thu, 23 Apr 2026 09:12:11 -0400 Subject: [PATCH v10 08/17] ext4: Report case sensitivity in fileattr_get Precedence: bulk X-Mailing-List: linux-xfs@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: <20260423-case-sensitivity-v10-8-c385d674a6cf@oracle.com> References: <20260423-case-sensitivity-v10-0-c385d674a6cf@oracle.com> In-Reply-To: <20260423-case-sensitivity-v10-0-c385d674a6cf@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+XAcsmYgBp6hq01cfRhNAJt0xx2EbnMwGvHTygaBYN6aRTE GINZfCUwkSJAjMEAAEKAB0WIQQosuWwEobfJDzyPv4zarMzb2Z/lwUCaeoatAAKCRAzarMzb2Z/ l+4aD/9AIIDkYsuxGwkaHb0alyjM31f5P4xoH9QnzDFp8NL/UVKvxCdSvFeMeyBHwVa7Fy9ruea zMwrMXaFVq2XZWeNySOA0xiFd4HT0xd854+HjYrlIEdnnKtj5zrn3FrAvE3n7mSq5YxhGF9pwhw 5RavDMmtW/5nOr3HYz1Gp7xrk3hPZOJ2uPXpSOVw9GMxNiotmNg0ZDwjDxSEMkM7+ScHLDGzMFR wLhw5l9Rs0mhNYWejSb2IQhDijmYO1Ym35ZiJjNu5ft4ChBGAuoxGL0m5/f8650C7D2PP+Uet9i r4Q+ALt7QWYX3HAPWpT2pMx8cFGUD25yODaeNdLKH5AiBlu8KtHiArKHxGo6nIDcxzr5RYhvmYp w5CIQChTJ12zqUt2vNfuYzcuNFQxah0Oy3lAmGkW7ZL+juq6mxvkPTy8PJDQvH8wLKBlWDHCpul 7a2TrzylW2pvpGiW96qRr6ZMwLsQLoWdZl+m5tbuBxniV9qHk/2Qw6yE/bwTx0MySJpVkZZgnZ4 ty+BBTmKui8m5aOah8Uf621+mouo4Ve7WFdy1i4zWhVUDQgbHt5cn182HB0L7hN8xQrYTHqTyM2 OKrOHQ/XIP5hQ1O6r2WRIOscUUUEfDJNxwOPDa/Lunw+phN71xW9DR540IhKBRXhREigJfqA7wH jFNwOPn3bVc/EfQ== 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