{"id":2197424,"url":"http://patchwork.ozlabs.org/api/1.0/patches/2197424/?format=json","project":{"id":12,"url":"http://patchwork.ozlabs.org/api/1.0/projects/12/?format=json","name":"Linux CIFS Client","link_name":"linux-cifs-client","list_id":"linux-cifs.vger.kernel.org","list_email":"linux-cifs@vger.kernel.org","web_url":"","scm_url":"","webscm_url":""},"msgid":"<20260217214741.1928576-17-cel@kernel.org>","date":"2026-02-17T21:47:40","name":"[v8,16/17] nfsd: Implement NFSv4 FATTR4_CASE_INSENSITIVE and FATTR4_CASE_PRESERVING","commit_ref":null,"pull_url":null,"state":"new","archived":false,"hash":"50bd04b4b84cde3356d636a011202e4aa06068a4","submitter":{"id":86689,"url":"http://patchwork.ozlabs.org/api/1.0/people/86689/?format=json","name":"Chuck Lever","email":"cel@kernel.org"},"delegate":null,"mbox":"http://patchwork.ozlabs.org/project/linux-cifs-client/patch/20260217214741.1928576-17-cel@kernel.org/mbox/","series":[{"id":492484,"url":"http://patchwork.ozlabs.org/api/1.0/series/492484/?format=json","date":"2026-02-17T21:47:24","name":"Subject: Exposing case folding behavior","version":8,"mbox":"http://patchwork.ozlabs.org/series/492484/mbox/"}],"check":"pending","checks":"http://patchwork.ozlabs.org/api/patches/2197424/checks/","tags":{},"headers":{"Return-Path":"\n ","X-Original-To":["incoming@patchwork.ozlabs.org","linux-cifs@vger.kernel.org"],"Delivered-To":"patchwork-incoming@legolas.ozlabs.org","Authentication-Results":["legolas.ozlabs.org;\n\tdkim=pass (2048-bit key;\n unprotected) header.d=kernel.org header.i=@kernel.org header.a=rsa-sha256\n header.s=k20201202 header.b=YmAljSoI;\n\tdkim-atps=neutral","legolas.ozlabs.org;\n spf=pass (sender SPF authorized) smtp.mailfrom=vger.kernel.org\n (client-ip=2600:3c09:e001:a7::12fc:5321; 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a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116;\n\tt=1771364906; cv=none;\n b=LeXsQwKsToWq69PxKT8D5tmrHDXyf7D/PKyaV/SxPXk17u0k68kiJf5KLdxiWHlsfcw82EQMKhLdoC3G3Rh6v+VgHCl6LYi6FH6/5vLaV0mH5BQoif27qf8Wrt6ESf2FoO6Fqx2+0oFfIW4Ha+uN870Ja0rjXzPPFQNhuvAYFKM=","ARC-Message-Signature":"i=1; a=rsa-sha256; d=subspace.kernel.org;\n\ts=arc-20240116; t=1771364906; c=relaxed/simple;\n\tbh=dLuQ/D4+QPIdNrj8vYbtVV6V60qI8TzxAknvddxFqXA=;\n\th=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References:\n\t MIME-Version;\n b=pAKi2iy3tqoiuvLAbIwWYR/e5tAVQocekUC/jOgb0AkuYIhNShyrP8/ZLP2bEH/lu9Z1Ga12myXvKzPNkMpHkxYbFO1m3gi63oVgIc4sCqtvO+lJ5NEsVIK9n3Dcz+TEG0Amwrg9HNENDGriPR7xbPojUs1GOZbEeJixkHF2J3k=","ARC-Authentication-Results":"i=1; smtp.subspace.kernel.org;\n dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org\n header.b=YmAljSoI; arc=none smtp.client-ip=10.30.226.201","DKIM-Signature":"v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org;\n\ts=k20201202; t=1771364906;\n\tbh=dLuQ/D4+QPIdNrj8vYbtVV6V60qI8TzxAknvddxFqXA=;\n\th=From:To:Cc:Subject:Date:In-Reply-To:References:From;\n\tb=YmAljSoIB7udjfFTqJPLjPbeQMbZ0izsXG/jgSsarVhYPllJVn/vAzJHLNtTNabVs\n\t 9EgZ6FWc3CDUsX4ZxBOOaCT/cM55JVfJoo0SpfzoypuMzfBDBpM4UFu+gLfZnzZf73\n\t 6Cmjdpt9YONgmt9f7QmQ9tfkMk++JtXrNz8Wq83lR+uvhZ56QmAb1IPIyI0dBYMlmA\n\t ckmfyKUMddyXZ97d1IY0+upVV0J0G0tyy5ZTgkNkBDZkm2bX2N0nNQwvr5032Bnn0i\n\t jNiiZdbtupPzS1P1nF3cV26oFkir3EH5M/xPWYhwXbm03xQNDobbf3CAN/KefrzCqd\n\t 9OPYgEb08+0Sw==","From":"Chuck Lever ","To":"Al Viro ,\n\tChristian Brauner ,\n\tJan Kara ","Cc":"linux-fsdevel@vger.kernel.org,\n\tlinux-ext4@vger.kernel.org,\n\tlinux-xfs@vger.kernel.org,\n\tlinux-cifs@vger.kernel.org,\n\tlinux-nfs@vger.kernel.org,\n\tlinux-api@vger.kernel.org,\n\tlinux-f2fs-devel@lists.sourceforge.net,\n\thirofumi@mail.parknet.co.jp,\n\tlinkinjeon@kernel.org,\n\tsj1557.seo@samsung.com,\n\tyuezhang.mo@sony.com,\n\talmaz.alexandrovich@paragon-software.com,\n\tslava@dubeyko.com,\n\tglaubitz@physik.fu-berlin.de,\n\tfrank.li@vivo.com,\n\ttytso@mit.edu,\n\tadilger.kernel@dilger.ca,\n\tcem@kernel.org,\n\tsfrench@samba.org,\n\tpc@manguebit.org,\n\tronniesahlberg@gmail.com,\n\tsprasad@microsoft.com,\n\ttrondmy@kernel.org,\n\tanna@kernel.org,\n\tjaegeuk@kernel.org,\n\tchao@kernel.org,\n\thansg@kernel.org,\n\tsenozhatsky@chromium.org,\n\tChuck Lever ","Subject":"[PATCH v8 16/17] nfsd: Implement NFSv4 FATTR4_CASE_INSENSITIVE and\n FATTR4_CASE_PRESERVING","Date":"Tue, 17 Feb 2026 16:47:40 -0500","Message-ID":"<20260217214741.1928576-17-cel@kernel.org>","X-Mailer":"git-send-email 2.53.0","In-Reply-To":"<20260217214741.1928576-1-cel@kernel.org>","References":"<20260217214741.1928576-1-cel@kernel.org>","Precedence":"bulk","X-Mailing-List":"linux-cifs@vger.kernel.org","List-Id":"","List-Subscribe":"","List-Unsubscribe":"","MIME-Version":"1.0","Content-Transfer-Encoding":"8bit"},"content":"From: Chuck Lever \n\nNFSD currently provides NFSv4 clients with hard-coded responses\nindicating all exported filesystems are case-sensitive and\ncase-preserving. This is incorrect for case-insensitive filesystems\nand ext4 directories with casefold enabled.\n\nQuery the underlying filesystem's actual case sensitivity via\nnfsd_get_case_info() and return accurate values to clients. This\nsupports per-directory settings for filesystems that allow mixing\ncase-sensitive and case-insensitive directories within an export.\n\nSigned-off-by: Chuck Lever \n---\n fs/nfsd/nfs4xdr.c | 31 +++++++++++++++++++++++++++----\n 1 file changed, 27 insertions(+), 4 deletions(-)","diff":"diff --git a/fs/nfsd/nfs4xdr.c b/fs/nfsd/nfs4xdr.c\nindex 5172dbd0cb05..26f77b622612 100644\n--- a/fs/nfsd/nfs4xdr.c\n+++ b/fs/nfsd/nfs4xdr.c\n@@ -3157,6 +3157,8 @@ struct nfsd4_fattr_args {\n \tu32\t\t\trdattr_err;\n \tbool\t\t\tcontextsupport;\n \tbool\t\t\tignore_crossmnt;\n+\tbool\t\t\tcase_insensitive;\n+\tbool\t\t\tcase_preserving;\n };\n \n typedef __be32(*nfsd4_enc_attr)(struct xdr_stream *xdr,\n@@ -3355,6 +3357,18 @@ static __be32 nfsd4_encode_fattr4_acl(struct xdr_stream *xdr,\n \treturn nfs_ok;\n }\n \n+static __be32 nfsd4_encode_fattr4_case_insensitive(struct xdr_stream *xdr,\n+\t\t\t\t\tconst struct nfsd4_fattr_args *args)\n+{\n+\treturn nfsd4_encode_bool(xdr, args->case_insensitive);\n+}\n+\n+static __be32 nfsd4_encode_fattr4_case_preserving(struct xdr_stream *xdr,\n+\t\t\t\t\tconst struct nfsd4_fattr_args *args)\n+{\n+\treturn nfsd4_encode_bool(xdr, args->case_preserving);\n+}\n+\n static __be32 nfsd4_encode_fattr4_filehandle(struct xdr_stream *xdr,\n \t\t\t\t\t const struct nfsd4_fattr_args *args)\n {\n@@ -3747,8 +3761,8 @@ static const nfsd4_enc_attr nfsd4_enc_fattr4_encode_ops[] = {\n \t[FATTR4_ACLSUPPORT]\t\t= nfsd4_encode_fattr4_aclsupport,\n \t[FATTR4_ARCHIVE]\t\t= nfsd4_encode_fattr4__noop,\n \t[FATTR4_CANSETTIME]\t\t= nfsd4_encode_fattr4__true,\n-\t[FATTR4_CASE_INSENSITIVE]\t= nfsd4_encode_fattr4__false,\n-\t[FATTR4_CASE_PRESERVING]\t= nfsd4_encode_fattr4__true,\n+\t[FATTR4_CASE_INSENSITIVE]\t= nfsd4_encode_fattr4_case_insensitive,\n+\t[FATTR4_CASE_PRESERVING]\t= nfsd4_encode_fattr4_case_preserving,\n \t[FATTR4_CHOWN_RESTRICTED]\t= nfsd4_encode_fattr4__true,\n \t[FATTR4_FILEHANDLE]\t\t= nfsd4_encode_fattr4_filehandle,\n \t[FATTR4_FILEID]\t\t\t= nfsd4_encode_fattr4_fileid,\n@@ -3954,8 +3968,9 @@ nfsd4_encode_fattr4(struct svc_rqst *rqstp, struct xdr_stream *xdr,\n \t\tif (err)\n \t\t\tgoto out_nfserr;\n \t}\n-\tif ((attrmask[0] & (FATTR4_WORD0_FILEHANDLE | FATTR4_WORD0_FSID)) &&\n-\t !fhp) {\n+\tif ((attrmask[0] & (FATTR4_WORD0_FILEHANDLE | FATTR4_WORD0_FSID |\n+\t\t\t FATTR4_WORD0_CASE_INSENSITIVE |\n+\t\t\t FATTR4_WORD0_CASE_PRESERVING)) && !fhp) {\n \t\ttempfh = kmalloc(sizeof(struct svc_fh), GFP_KERNEL);\n \t\tstatus = nfserr_jukebox;\n \t\tif (!tempfh)\n@@ -3967,6 +3982,14 @@ nfsd4_encode_fattr4(struct svc_rqst *rqstp, struct xdr_stream *xdr,\n \t\targs.fhp = tempfh;\n \t} else\n \t\targs.fhp = fhp;\n+\tif (attrmask[0] & (FATTR4_WORD0_CASE_INSENSITIVE |\n+\t\t\t FATTR4_WORD0_CASE_PRESERVING)) {\n+\t\tstatus = nfsd_get_case_info(args.fhp, &args.case_insensitive,\n+\t\t\t\t\t &args.case_preserving);\n+\t\tif (status != nfs_ok)\n+\t\t\tattrmask[0] &= ~(FATTR4_WORD0_CASE_INSENSITIVE |\n+\t\t\t\t\t FATTR4_WORD0_CASE_PRESERVING);\n+\t}\n \n \tif (attrmask[0] & FATTR4_WORD0_ACL) {\n \t\terr = nfsd4_get_nfs4_acl(rqstp, dentry, &args.acl);\n","prefixes":["v8","16/17"]}