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 4EEA9393DE8; Fri, 16 Jan 2026 14:46:57 +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=1768574817; cv=none; b=dYn16+v4jtVHB07ouWNLob+ToGaYkbFsHK2OsELejVGh55bf2YfLVBcJHgqtV31ig9VwdvJhOTBM4Hz0stjR1qqcRDdE+mh2MYDXo1yPQ0Sz+RqrlhqsP6x04xGarZs3GBoTohJ5Y1LKuP9GVk3p6f0sfTyuSY+VI/sJEhUie2Q= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1768574817; c=relaxed/simple; bh=dTIl6HtOSjKpxVPEQOWVBhUGtcTm9fsYwG/kaN8wdrk=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=eHCCfLhrREO9fEHgdH++td2eWg4Te8Clr/ACxRu+68EI0+k0XHBoNbwgt76gwWhWykXQLNZBCVb5mu8Q9taKIXgl/Tjm4CuG9V9Jo7X/FUs8edcddvjosWuIRkSJhGT+dlmqCSAxsnEOMvr6rUhz5Jd4wL1KfbaK31swW0V9pPg= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=U2gRfJNt; 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="U2gRfJNt" Received: by smtp.kernel.org (Postfix) with ESMTPSA id C6730C19423; Fri, 16 Jan 2026 14:46:54 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1768574817; bh=dTIl6HtOSjKpxVPEQOWVBhUGtcTm9fsYwG/kaN8wdrk=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=U2gRfJNtMb7vGvbi1mR1OmNnSlcZQNh72nqirwA+26rodszeuPkl+jqOgQe8iwZfM nwgqwTr/KUz5y3NCq8XBG1cZnmM0cqyaaF8J3lXSGriQ7mLZPwb0EaA/hA3Kva7IlT amODQhyX872FEDdmAvWpLa7dJDU4x6dTjQXKKGHifwHzuWltSmuKPalQLm1Nbj1hAP ZAG6jARzjYPT/fZmI4hysY+vfZKzo+NgqZkashPJL3Dr5gz9C3GLfRWdXxuHWJVnh8 Q1Dm2SL7gxI2faPAyqddc8++3NnbfWqs5/adAqPQO1n/CCw3wzv3UFCwa1Mm+pRCq7 8dU9q0+Vy5tCw== 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-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 Subject: [PATCH v5 15/16] nfsd: Implement NFSv4 FATTR4_CASE_INSENSITIVE and FATTR4_CASE_PRESERVING Date: Fri, 16 Jan 2026 09:46:14 -0500 Message-ID: <20260116144616.2098618-16-cel@kernel.org> X-Mailer: git-send-email 2.52.0 In-Reply-To: <20260116144616.2098618-1-cel@kernel.org> References: <20260116144616.2098618-1-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 NFSD currently provides NFSv4 clients with hard-coded responses indicating all exported filesystems are case-sensitive and case-preserving. This is incorrect for case-insensitive filesystems and ext4 directories with casefold enabled. Query the underlying filesystem's actual case sensitivity via nfsd_get_case_info() and return accurate values to clients. This supports per-directory settings for filesystems that allow mixing case-sensitive and case-insensitive directories within an export. Signed-off-by: Chuck Lever --- fs/nfsd/nfs4xdr.c | 30 ++++++++++++++++++++++++++---- 1 file changed, 26 insertions(+), 4 deletions(-) diff --git a/fs/nfsd/nfs4xdr.c b/fs/nfsd/nfs4xdr.c index 51ef97c25456..167bede81273 100644 --- a/fs/nfsd/nfs4xdr.c +++ b/fs/nfsd/nfs4xdr.c @@ -2933,6 +2933,8 @@ struct nfsd4_fattr_args { u32 rdattr_err; bool contextsupport; bool ignore_crossmnt; + bool case_insensitive; + bool case_preserving; }; typedef __be32(*nfsd4_enc_attr)(struct xdr_stream *xdr, @@ -3131,6 +3133,18 @@ static __be32 nfsd4_encode_fattr4_acl(struct xdr_stream *xdr, return nfs_ok; } +static __be32 nfsd4_encode_fattr4_case_insensitive(struct xdr_stream *xdr, + const struct nfsd4_fattr_args *args) +{ + return nfsd4_encode_bool(xdr, args->case_insensitive); +} + +static __be32 nfsd4_encode_fattr4_case_preserving(struct xdr_stream *xdr, + const struct nfsd4_fattr_args *args) +{ + return nfsd4_encode_bool(xdr, args->case_preserving); +} + static __be32 nfsd4_encode_fattr4_filehandle(struct xdr_stream *xdr, const struct nfsd4_fattr_args *args) { @@ -3487,8 +3501,8 @@ static const nfsd4_enc_attr nfsd4_enc_fattr4_encode_ops[] = { [FATTR4_ACLSUPPORT] = nfsd4_encode_fattr4_aclsupport, [FATTR4_ARCHIVE] = nfsd4_encode_fattr4__noop, [FATTR4_CANSETTIME] = nfsd4_encode_fattr4__true, - [FATTR4_CASE_INSENSITIVE] = nfsd4_encode_fattr4__false, - [FATTR4_CASE_PRESERVING] = nfsd4_encode_fattr4__true, + [FATTR4_CASE_INSENSITIVE] = nfsd4_encode_fattr4_case_insensitive, + [FATTR4_CASE_PRESERVING] = nfsd4_encode_fattr4_case_preserving, [FATTR4_CHOWN_RESTRICTED] = nfsd4_encode_fattr4__true, [FATTR4_FILEHANDLE] = nfsd4_encode_fattr4_filehandle, [FATTR4_FILEID] = nfsd4_encode_fattr4_fileid, @@ -3674,8 +3688,9 @@ nfsd4_encode_fattr4(struct svc_rqst *rqstp, struct xdr_stream *xdr, if (err) goto out_nfserr; } - if ((attrmask[0] & (FATTR4_WORD0_FILEHANDLE | FATTR4_WORD0_FSID)) && - !fhp) { + if ((attrmask[0] & (FATTR4_WORD0_FILEHANDLE | FATTR4_WORD0_FSID | + FATTR4_WORD0_CASE_INSENSITIVE | + FATTR4_WORD0_CASE_PRESERVING)) && !fhp) { tempfh = kmalloc(sizeof(struct svc_fh), GFP_KERNEL); status = nfserr_jukebox; if (!tempfh) @@ -3687,6 +3702,13 @@ nfsd4_encode_fattr4(struct svc_rqst *rqstp, struct xdr_stream *xdr, args.fhp = tempfh; } else args.fhp = fhp; + if (attrmask[0] & (FATTR4_WORD0_CASE_INSENSITIVE | + FATTR4_WORD0_CASE_PRESERVING)) { + status = nfsd_get_case_info(args.fhp, &args.case_insensitive, + &args.case_preserving); + if (status != nfs_ok) + goto out; + } if (attrmask[0] & FATTR4_WORD0_ACL) { err = nfsd4_get_nfs4_acl(rqstp, dentry, &args.acl); -- 2.52.0