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 08BD33BE64B; Thu, 23 Apr 2026 13:12:52 +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=1776949972; cv=none; b=KRieI4XRXUVJtyXnbeHv0jg+y4mOJ6vtYKF0vCrVNn60NeHOlSfhNRjisj/5OeJ1owjmvjOCq3IcuBiR8tgA4VTTQ+/xHDNT8U5PcgDDQGF2uYDxXqvSn+7MvgYoKNZUBF5icBFjWdsu4QuUhbQoD+A5BXfHYAaav/FAh2R2aWQ= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1776949972; c=relaxed/simple; bh=PjsU9Svmz06mzp6rEncT9E/c+j3QoZVc1ar43kaCids=; h=From:Date:Subject:MIME-Version:Content-Type:Message-Id:References: In-Reply-To:To:Cc; b=DQVQb6vr9Nf0C5Rtfdpfno9FgOmVQHM4vJg669v3h7CeN4rI6jzEEqW8UI6tlHq0P6mt5hr0bsEukm4L1WzB5u1jnU/DwG1is5kbG+iEzBBZeN3om1GnLydfTCjaYA9G2sKFrXpOfHydFc1xAugVpV84oRvpSkniCjjyE/ktKss= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=XyVfCJyz; 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="XyVfCJyz" Received: by smtp.kernel.org (Postfix) with ESMTPSA id BE700C2BCB4; Thu, 23 Apr 2026 13:12:49 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1776949971; bh=PjsU9Svmz06mzp6rEncT9E/c+j3QoZVc1ar43kaCids=; h=From:Date:Subject:References:In-Reply-To:To:Cc:From; b=XyVfCJyzEOK6OpBoLoOefj9vIEAfTQY4RMuHpWrtQCKtxw8ZQ2hwX/a4+VoEIL5xZ G2K2PcoYJ26JDjQ7NYsztAgoe63NSUFgOMV/ljxUVxbi68qgqws5++KyIe/QchZzk5 9zwmwf751l0WrUfgoqU6E9OjmpI5WRGxdWVhD90X/+Fmdr7iwz+iJZl8uRi9qH17X8 OFl6zyCFSjoCTiwgoSUajU1CL6ZvxhP6aDyn4PNCUqy89DMWuYLYZyZ83PhfjM5z+2 E5q0KcAfDJ82+5mf5EWd2oc2IY+iotYbZKLoYnM7pl0lwrLN81p+URZBNfX0kIKS4a wscFMoYjBQLWg== From: Chuck Lever Date: Thu, 23 Apr 2026 09:12:15 -0400 Subject: [PATCH v10 12/17] f2fs: Add case sensitivity reporting to 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-v10-12-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=1357; i=chuck.lever@oracle.com; h=from:subject:message-id; bh=VPjzbnXW1pubGqzv+x/v8JVwQ1rV4VASVn6uK7QQPMw=; b=owEBbQKS/ZANAwAKATNqszNvZn+XAcsmYgBp6hq01oe4hrZUserJsuf/NEs+cgupLfYyc5a52 6R79zdge4iJAjMEAAEKAB0WIQQosuWwEobfJDzyPv4zarMzb2Z/lwUCaeoatAAKCRAzarMzb2Z/ l4ZBD/9wjTO+FgmmJWESBaRJUhoMgK1nZIp7zgs+Wa6SmIxuIdzrpbMs+xm1OAqllWNB6IIvw0B 6ccNv0Q6DS6iU8ItuVw3tOp7HLe401lJlgouULwUUMYXLU1E+l+gXr8m6rPUoTXJNEhss2AEH9r oBoz6jRj6LaH7on75SZvEW6/28fC3GxcUfB+2I5y6TyDhu/GjizbiI7ZK46ZT3DXHBk8OOk+pjG cZv6oeu29/MBQQ4gTDr7WSNkkbIts35lcIrm/W7nq0AY4jAkarHCPcm8j5kVpdQBO15BC/+/6we dgM6/p7jV61E5LjEluzL9b55N1ntJRwTHuu6mcTWqif2pT3aOvWkBJNuluEJDOkCG/oFuTyT4dJ xBJWjtURC6STk6hOIZTx37/slUhlp1aocnhqnxFEnzCaDVpFw2NGOWUH8Ew7HJdOwt3y+e+52Mc ReREwUMol0AizDnbSIpJaq77SJjUp78zfj/DdTmFj1MKChJUM/1jVKcfsVP8rgJl4FPwoyyNsHi stShGcmDkz7XyKa4+QD1TfOSqP/TAyHCADwELknIrkme0FX2UNxRnPZA4WAROx7QPVJlg9ab5nu 9mmP3QrzjSE1I4rilxNUgsThXlThhwP6VYCF4yPRhdhGIhi2m5wrUFRW5Z2ANHDlFbIQsUjHgey ihCsVbuZhW2a1+g== X-Developer-Key: i=chuck.lever@oracle.com; a=openpgp; fpr=28B2E5B01286DF243CF23EFE336AB3336F667F97 From: Chuck Lever NFS and other remote filesystem protocols need to determine whether a local filesystem performs case-insensitive lookups so they can provide correct semantics to clients. Without this information, f2fs exports cannot properly advertise their filename case behavior. Report f2fs case sensitivity behavior via the FS_XFLAG_CASEFOLD flag. Like ext4, f2fs supports per-directory case folding via the casefold flag (IS_CASEFOLDED). f2fs always preserves case at rest. Reviewed-by: Chao Yu Signed-off-by: Chuck Lever --- fs/f2fs/file.c | 8 ++++++++ 1 file changed, 8 insertions(+) diff --git a/fs/f2fs/file.c b/fs/f2fs/file.c index fb12c5c9affd..347568ff0d58 100644 --- a/fs/f2fs/file.c +++ b/fs/f2fs/file.c @@ -3463,6 +3463,14 @@ int f2fs_fileattr_get(struct dentry *dentry, struct file_kattr *fa) if (f2fs_sb_has_project_quota(F2FS_I_SB(inode))) fa->fsx_projid = from_kprojid(&init_user_ns, fi->i_projid); + /* + * Casefold is a per-directory attribute in f2fs; the on-disk + * name is preserved regardless. Report FS_XFLAG_CASEFOLD for + * casefolded directories so callers (e.g. NFS export) can + * advertise case-insensitive lookup semantics for that tree. + */ + if (IS_CASEFOLDED(inode)) + fa->fsx_xflags |= FS_XFLAG_CASEFOLD; return 0; } -- 2.53.0