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 AAFE93F0A90; Thu, 23 Apr 2026 13:13:01 +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=1776949981; cv=none; b=s2OTt95sXRGCGYSTd0hLPbPO+CUsqA4XZLrvw1riOzLVFdctzQBhmni1nZl5hc91ilYnyoccr3mHdh1rO1OO3+iHShc9gXGZ9BOOVERUcEQIxuSUwFnFTeveBWIwfz2fXAFOynjStUm1MqKF6RHTeXvnNUqRH24FcuOUBfbaxlI= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1776949981; c=relaxed/simple; bh=XYKt46mg6wMVV2YdJGZU1apyeQ0MXeEOOUK+OVQco70=; h=From:Date:Subject:MIME-Version:Content-Type:Message-Id:References: In-Reply-To:To:Cc; b=PeUa2/iG/p9uCV8PtehpuLSAYP0a9WyvFVeu5Gf/JZR/8sDsB0v2XN360rSp8GjqTQZKYd/LN36MaW7Z5VwTcVhEp0FJ23EsK24wZPdyI7MUtx9rWzyHgVh10LNreR8RBm8YVhtIejTlZbBCaAdwEPtSiVk0IxbBxmbkaDz4GsA= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=JaYE/SnQ; 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="JaYE/SnQ" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 48483C2BCB3; Thu, 23 Apr 2026 13:12:59 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1776949981; bh=XYKt46mg6wMVV2YdJGZU1apyeQ0MXeEOOUK+OVQco70=; h=From:Date:Subject:References:In-Reply-To:To:Cc:From; b=JaYE/SnQVrEr92eGos5xu+rxKnYB29JOGxvTWLOW1s8/0pkDpc/NDjL6YenlsD1UX eHtXvOkGvvUY70x9iSx5tdDAD46V14R1J3yE6Cl67tvoW7BkGGfsP3gX1aHI6j8u8F 2wCG3dL6AJd9cNlnrojPiq+yf0RiFQqXeENNOZRZVqchN0PgAagYrcrDs+Kli5SN70 FOGzI0MZoHx9utRo0PcvcCOwYvLnkXClk5EfZ00GJ/AbDnQfP9YUdIJgBOvI7w8BqR IzJ06vmiyD90lWmlKydA/mr2NNtbgZd4Guj+j9XGwHh3GzzLGmatVAnLpG/t8FCBG5 WVJsMO7xH30mQ== From: Chuck Lever Date: Thu, 23 Apr 2026 09:12:19 -0400 Subject: [PATCH v10 16/17] nfsd: Implement NFSv4 FATTR4_CASE_INSENSITIVE and FATTR4_CASE_PRESERVING Precedence: bulk X-Mailing-List: linux-fsdevel@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-v10-16-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=2833; i=chuck.lever@oracle.com; h=from:subject:message-id; bh=QFOGuYFmcxqWyXGZEGt68U1bhDPXmPPrCdAEtt84t6g=; b=owEBbQKS/ZANAwAKATNqszNvZn+XAcsmYgBp6hq0SERDMzl/Ku6k/coKNHnWTaSTkehoUKGr1 XmcqZPciViJAjMEAAEKAB0WIQQosuWwEobfJDzyPv4zarMzb2Z/lwUCaeoatAAKCRAzarMzb2Z/ l+ycD/0XgnwZjb+9LZ1rFtZ/uYLu7XNGKoWGsTX0pGthYq7Ri4V7/KNMz7dap+QXhykptCfRODB VXFszVhCfmFBjn32+ec5ZMA65+iem2nVL18lFNplLt84eYxQlVQ4kUioFiyDG8JZslt5cNfV7r5 o/8ILCI9Ea7ga6nEEXUUiXkugmzKgDPiK56FVzu8gLZA53SIBoiILFyQMskPQ2LmTTGFDwtoQun J/qM4Q4WErc5UybzBqcVlWxD8lYBlpMqmFiSpaHFFWk30HYuANc2srzAY049/esIHMLWRlZDXJe wHswH9Qo0VyHxY1jtAw2o6Lt+gPrX9DaSE5xac6hlhc+0e10IvKCsymoUKbK808tRIRDiIPtfgU VL3Vv5rpzV821SHU5m8iF8PwxYyg3OVvCSfaZ7ntMLtLz+I2AArRCXRUPeutyc2OWuYFZG/KUdv SjpeeLJ/IBjZjwyMKdGYxdGlVUaXoXjcmCxB/4dD30XTIVpP1nM0V3jHKhL1usNCeJE3Y00RvLb IzoPwqVA4F0ETMqlhXoC+FcuVuG1jFzQiL1fa/9U3GqfuDXA6E2haY4V3H3kf4anCk+xZ896xZ4 TmS6hzQD9y91jQbH19KpUVc+UXRiSK8OwnDtePopyx6OsNf8SwMTYN5qbCQvD0KbYOqEt10yfjI b/LfLZXA5r/lbRA== X-Developer-Key: i=chuck.lever@oracle.com; a=openpgp; fpr=28B2E5B01286DF243CF23EFE336AB3336F667F97 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 | 25 +++++++++++++++++++++++-- 1 file changed, 23 insertions(+), 2 deletions(-) diff --git a/fs/nfsd/nfs4xdr.c b/fs/nfsd/nfs4xdr.c index 2a0946c630e1..961cd59756fb 100644 --- a/fs/nfsd/nfs4xdr.c +++ b/fs/nfsd/nfs4xdr.c @@ -3158,6 +3158,8 @@ 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, @@ -3356,6 +3358,18 @@ 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) { @@ -3748,8 +3762,8 @@ 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, @@ -3968,6 +3982,13 @@ 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(dentry, &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); -- 2.53.0