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 9D9093148A0; Thu, 11 Dec 2025 15:21:58 +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=1765466518; cv=none; b=KGK/Ls7os49h81zwsD/x1q3GaqNnUsy03R5dZ2TlDeV5fecdJG0rHD5fq0EiSxEY5MWkYseanrm5+Gv24WSNKZa+VG8zWd3i+eUrYwUWmyFl1E2tEWiS2mk0D5vS6I5t+Eb0J4PUIByfuCxOXqHoHtjiLAyrxMi9LXj/XBJhsl0= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1765466518; c=relaxed/simple; bh=cBQ7OwxCQJmyRnBB78Msff46NnL6E68T38nm8NO24nE=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=gXfwGuKHwXAe/RQFDnJeKd5zSQibNXwddvJMk0fVc32Iu2SB0I+kznuGb3VmbFERw431mY1x568x3Dux1m+wEX2y8X2sdAcDvvRD+j7LcGt3ioMaEutUAESSmQDMcAv7IyPDOqjSJgPggh4xVN1iw+beUcN4Y0uAiRZRkvfGSh4= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=n4AH/VHT; 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="n4AH/VHT" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 61525C16AAE; Thu, 11 Dec 2025 15:21:57 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1765466518; bh=cBQ7OwxCQJmyRnBB78Msff46NnL6E68T38nm8NO24nE=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=n4AH/VHTRJQ2E11//4xXPtHcDqYx6hvHuGFjclBd+irtPAI7C1nNdhc1dyWMjnW00 OXeCbztIERWLDCzlxhb6txxL6UGHnCczW9FC7FhdR0rkdAGd2EhKGP9ZT2oT6RGaid N6DgberopwgdLk/w4u4ynLdtTbSzKgN3HTJTjSZ1owilOgEFYoP1nRqnXXFohTwl9k t5z7PRFM8rzq0JH0KeXjs5rlmXSXqSmpS6IitF1bHPLakO2vnOCf/covPTLFNMmNKY JXqTgX4lLENYAB9XUcXHjer+nD5SrJ6V5d0xhFO1dyKayhUOWz1mJfoSLy2hXWAZqX sM8HmWJH6cTUw== From: Chuck Lever To: Al Viro , Christian Brauner Cc: , linux-ext4@vger.kernel.org, , , hirofumi@mail.parknet.co.jp, almaz.alexandrovich@paragon-software.com, tytso@mit.edu, adilger.kernel@dilger.ca, Volker.Lendecke@sernet.de, Chuck Lever Subject: [PATCH v2 6/6] nfsd: Implement NFSv4 FATTR4_CASE_INSENSITIVE and FATTR4_CASE_PRESERVING Date: Thu, 11 Dec 2025 10:21:16 -0500 Message-ID: <20251211152116.480799-7-cel@kernel.org> X-Mailer: git-send-email 2.52.0 In-Reply-To: <20251211152116.480799-1-cel@kernel.org> References: <20251211152116.480799-1-cel@kernel.org> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit From: Chuck Lever Replace the hard-coded values for the NFSv4 case_insensitive and case_preserving attributes with dynamic values retrieved from the underlying filesystem via vfs_get_case_info(). This allows NFSv4 clients to discover the actual case sensitivity behavior of exported filesystems, including per-directory settings for filesystems like ext4 with casefold support. 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 67bb9c0b9fcb..0c51d390d995 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) { @@ -3482,8 +3496,8 @@ 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, @@ -3669,8 +3683,9 @@ 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) @@ -3682,6 +3697,13 @@ 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