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 88C4232C924; Wed, 22 Apr 2026 23:30:55 +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=1776900655; cv=none; b=kjItZ4xNqAxnV9+/TBKxV7cFSTQ7Yuq6c92Fk3+TG6uJrmiWjMe040xuA+7eOkIl3DaA4Yyq+QlN69OJNBFZX8/uKgVGr+6ilxRYLFXl+kbM1ahCeH1xxkq3zxPiN8cgxlMzCTVkWXVLpg8btykzSeJLbpPeiy4o6Gb/hlho/2w= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1776900655; c=relaxed/simple; bh=XYKt46mg6wMVV2YdJGZU1apyeQ0MXeEOOUK+OVQco70=; h=From:Date:Subject:MIME-Version:Content-Type:Message-Id:References: In-Reply-To:To:Cc; b=fOovFjfvVfdsphkx+wt0GqCFBiM8x28H3U9bvHuZJfZR5W55hk+VNwYxh8thQ/8hz2oEtr3P/fQZmIK0n6myfcUNeZXZIJX8dKjey3K9H1DN/4Kr8STpvoyNWGPALzfRhXFLr943NVisLXF8Gna4WbIHxnsxy8A9exOHQ0I0EUQ= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=lvp+IDK6; 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="lvp+IDK6" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 44931C2BCB6; Wed, 22 Apr 2026 23:30:53 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1776900655; bh=XYKt46mg6wMVV2YdJGZU1apyeQ0MXeEOOUK+OVQco70=; h=From:Date:Subject:References:In-Reply-To:To:Cc:From; b=lvp+IDK6TNvywIDdBKgvL/3FBZyiOSND1UZwuwpepvtodHyNQ22Rpk34z7o+XwD7e fyilqzrwnSbby6n2hr7O3DctbkWKbzKvx2k0Xn65i9v0RzGxrhCR2ROLUZV6VOxxmx KNNKvWsE7LuO14q556uqABaadKIo4VEx/tsqrj4Owh6T6kaqswuw+HCPI621rlyOdt MtY/vdVGGzIwA0sR15y2Q4DJ1eibVovJKqQk/stPCh84oaddY17YdjxkD6OHLRwHBb MaPRYrwaUyP+tSbkRuC774MSHfqcv8QJZzIidu8JZbHFb0OeXwZBfwSGMszKafe2i+ nFzpNjy2PD0rA== From: Chuck Lever Date: Wed, 22 Apr 2026 19:30:10 -0400 Subject: [PATCH v9 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: <20260422-case-sensitivity-v9-16-be023cc070e2@oracle.com> References: <20260422-case-sensitivity-v9-0-be023cc070e2@oracle.com> In-Reply-To: <20260422-case-sensitivity-v9-0-be023cc070e2@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+XAcsmYgBp6VoGx7DVo78KMprpZqfGCN5WzT9tzWxff4Hog q9AnM+6V8KJAjMEAAEKAB0WIQQosuWwEobfJDzyPv4zarMzb2Z/lwUCaelaBgAKCRAzarMzb2Z/ l36hD/0YyDllkoj3d155OKOQkF8QDlniZ5TxDzwN6u+gE1KDVIzqv9ACdZy4wbiVIyVZyldA6km mCWAACkKLFXvSOQwqeJqP5qCLohqRwSGMsFVMYCrDQ/l/ezJvzoeMi4ccEBQHv2vmAnFtaj+C4s y4wPiimVK2pyzH4Xc5A074f52x8ee3Zd5ws0eaoanY6qy88+VNUX9NhzY/Iog51+pC9HP3hKLLw azL6f1cOlWoVH4VSKU/WZK21p4+wJqS01TJNQqGXHRmkwNBj+qrxbRt8buy6qx7nuKEadblDPmm l+CXpMHexXB8w4HsTVM67NDtYC2ZefsnZP0nZJrtnUKraOVYqkhjp9CIkLlcUQkKFEfcKYO07pm tS94Cd6hYeMQQvM8uX7PgV3jWcnwhduqI2IoE0kqmQTwX6wEPYRkRgycoWP712C26vOeDh6l+ye 909L40ArKd+qqRci1v5oQbNFWe3POYlJuTBPGEDBvVlRjNZ86AHdmQkRZ8+qLD5I6RhX45GT8qY FxpoFcBhefi2WYTfaL+ifCsXqCj4GlmwKD2d0yTpPTinJuMcF58kZ1n0RZDrCaGkDQ0acTBKtNo FCvwH05g9FPfui96PcgqM1strXBurb+2eDW1SWExz4UehYB10IK+49ihwvOlag8/A0ZsBtwHf+C +8qaVJ+Ww3Ta4/g== 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