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 E1184367F48; Thu, 22 Jan 2026 16:03:36 +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=1769097817; cv=none; b=gP7VpT1CydcKJKncagW3q9G6eiBfcZ78UaMxop/DtDJGy1r/4LZPoHe9F9PlunKsTZzaX/okxRj+OhdVyQrtiRRS/KrdCdmOgu165SmN32Ka6gHY5/m2OfVSNtRR2apvIGXenff80F8MxPIuTlLLLIXHn5UrMKYZIGSVZ4jYdt4= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1769097817; c=relaxed/simple; bh=Kj+ayzVWTGTE/9UqBMu9SybvI6joLEnV2BfTwDGEXeg=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=qi+L5n33XphWxlTxRjjhisPYclCRhM4xg+bFN0WN16r1ebA9DpYwbJRCFve3BCpETo3x+CXGGKgYDsr67qr8dGzQ4FruuIZC+IemIit6R2gg5z0SEDo6xf5srS1JPfb4MECVie0O5qt0PzAO5dcSF4SYpLy3Jg975Uh73a99eso= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=X7pHCXBA; 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="X7pHCXBA" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 8FDB8C116C6; Thu, 22 Jan 2026 16:03:33 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1769097815; bh=Kj+ayzVWTGTE/9UqBMu9SybvI6joLEnV2BfTwDGEXeg=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=X7pHCXBAinh6H8ZYn6Eb3un06aRuRAt5mTyxa3ks5jcEg7tVd8V9L39NatW85XC5F eGQB71z6LusnxAi5F6aW4stt1oV4700INXmDBFdlllvUwZDHA/Yb/42yY6vNqGpj57 qRoVEVGNcOScP4KRzYA3rWSZyh08fo5JLYlzLsnb1XNGdqippb/JBuxBOuJKiAA5AH aT70DBp2amQWE9GQ6Hu54hhWd4Tq2McMKVnSwx9vUix5IWBW0FrEYNCK9e5WXGx0EY YSUUwfyi2YDwXAX2LxNsoAySQwA7uBsTDmZBtn5aUxLjiL2BQDnrlbUH+cFiMZu6Fq tLqTkF+ffwl0A== From: Chuck Lever To: Al Viro , Christian Brauner , Jan Kara Cc: , linux-ext4@vger.kernel.org, linux-xfs@vger.kernel.org, linux-cifs@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 , "Darrick J. Wong" Subject: [PATCH v7 08/16] xfs: Report case sensitivity in fileattr_get Date: Thu, 22 Jan 2026 11:03:03 -0500 Message-ID: <20260122160311.1117669-9-cel@kernel.org> X-Mailer: git-send-email 2.52.0 In-Reply-To: <20260122160311.1117669-1-cel@kernel.org> References: <20260122160311.1117669-1-cel@kernel.org> Precedence: bulk X-Mailing-List: linux-fsdevel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit From: Chuck Lever Upper layers such as NFSD need to query whether a filesystem is case-sensitive. Report case sensitivity via the FS_XFLAG_CASEFOLD flag in xfs_fileattr_get(). XFS always preserves case. XFS is case-sensitive by default, but supports ASCII case-insensitive lookups when formatted with the ASCIICI feature flag. Reviewed-by: "Darrick J. Wong" Signed-off-by: Chuck Lever --- fs/xfs/xfs_ioctl.c | 7 +++++++ 1 file changed, 7 insertions(+) diff --git a/fs/xfs/xfs_ioctl.c b/fs/xfs/xfs_ioctl.c index f0417c4d1fca..da98d4422b02 100644 --- a/fs/xfs/xfs_ioctl.c +++ b/fs/xfs/xfs_ioctl.c @@ -516,6 +516,13 @@ xfs_fileattr_get( xfs_fill_fsxattr(ip, XFS_DATA_FORK, fa); xfs_iunlock(ip, XFS_ILOCK_SHARED); + /* + * FS_XFLAG_CASEFOLD indicates case-insensitive lookups with + * case preservation. This matches ASCIICI behavior: lookups + * fold ASCII case while filenames remain stored verbatim. + */ + if (xfs_has_asciici(ip->i_mount)) + fa->fsx_xflags |= FS_XFLAG_CASEFOLD; return 0; } -- 2.52.0