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GET /api/patches/2228072/?format=api
{ "id": 2228072, "url": "http://patchwork.ozlabs.org/api/patches/2228072/?format=api", "web_url": "http://patchwork.ozlabs.org/project/linux-cifs-client/patch/20260424-case-sensitivity-v11-14-de5619beddaf@oracle.com/", "project": { "id": 12, "url": "http://patchwork.ozlabs.org/api/projects/12/?format=api", "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": "", "list_archive_url": "", "list_archive_url_format": "", "commit_url_format": "" }, "msgid": "<20260424-case-sensitivity-v11-14-de5619beddaf@oracle.com>", "list_archive_url": null, "date": "2026-04-25T01:53:16", "name": "[v11,14/15] nfsd: Implement NFSv4 FATTR4_CASE_INSENSITIVE and FATTR4_CASE_PRESERVING", "commit_ref": null, "pull_url": null, "state": "new", "archived": false, "hash": "975ca7f954cd52c154c9421ea1a5f9005f091d9e", "submitter": { "id": 86689, "url": "http://patchwork.ozlabs.org/api/people/86689/?format=api", "name": "Chuck Lever", "email": "cel@kernel.org" }, "delegate": null, "mbox": "http://patchwork.ozlabs.org/project/linux-cifs-client/patch/20260424-case-sensitivity-v11-14-de5619beddaf@oracle.com/mbox/", "series": [ { "id": 501416, "url": "http://patchwork.ozlabs.org/api/series/501416/?format=api", "web_url": "http://patchwork.ozlabs.org/project/linux-cifs-client/list/?series=501416", "date": "2026-04-25T01:53:02", "name": "Exposing case folding behavior", "version": 11, "mbox": "http://patchwork.ozlabs.org/series/501416/mbox/" } ], "comments": "http://patchwork.ozlabs.org/api/patches/2228072/comments/", "check": "pending", "checks": "http://patchwork.ozlabs.org/api/patches/2228072/checks/", "tags": {}, "related": [], "headers": { "Return-Path": "\n <linux-cifs+bounces-11104-incoming=patchwork.ozlabs.org@vger.kernel.org>", "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=qi95WQXp;\n\tdkim-atps=neutral", "legolas.ozlabs.org;\n spf=pass (sender SPF authorized) smtp.mailfrom=vger.kernel.org\n (client-ip=2600:3c04:e001:36c::12fc:5321; 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a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116;\n\tt=1777082039; cv=none;\n b=fBVyz7v/79Jn0ofapMDtKW+xjYy+s5OlQHLiG0tDw1QHrxgXCJP5F1K3V9GMwPfgxuULNI8QK3HiOVDUzw6u3UftEjOAsMhUzK8HcvJ8fGKZxxYnZKXFbbsO+n62vTZqArUShF0PFBfE+E2y/S6OqhzDTNEjR8DckjfZT/BAxz4=", "ARC-Message-Signature": "i=1; a=rsa-sha256; d=subspace.kernel.org;\n\ts=arc-20240116; t=1777082039; c=relaxed/simple;\n\tbh=7qcGCalbO8KkpsIrewxDQbW3F+/q9MR1MUul4uvB6WI=;\n\th=From:Date:Subject:MIME-Version:Content-Type:Message-Id:References:\n\t In-Reply-To:To:Cc;\n b=JmVDYEATpUosqmfwsGGAR5acqBVvjQqD1g+v/k6pXD8K63b94I5R026V55p/IkrWlohgwfANbl5kf5nnAO3JlRLOx1S4BzUN8X4F9SqIYtfKx5jggFtzmal4Be4sxmUdU7YbIdASZCZOnXuFfjCb9ARZmHqE5yYP8ziuCgSRehs=", "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=qi95WQXp; 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=1777082038;\n\tbh=7qcGCalbO8KkpsIrewxDQbW3F+/q9MR1MUul4uvB6WI=;\n\th=From:Date:Subject:References:In-Reply-To:To:Cc:From;\n\tb=qi95WQXpNDyjFy0LmxKlrTgZYQSG6IZVyOSGR3pwU5+X2dq0sJrZu1yDrdNkrP7qB\n\t qg+uy3te+g0wBp6ZJbxfv1lETETLS9en9LpqJR3FvgNEbp9H4XTYmJEPoMp0dR46tq\n\t lnEnRr0ol+e4oEFKkzpoLJSplrPxMgL0oMqjZ0qp2C9kh8dvh1+L4h2gJGWtu/HNx0\n\t 3MS87r0r/0080EUT3t/YYala546EMl1AP+CjzU6IER3AQ6O+k5SKsfOBYjn2DQu2aV\n\t 5x7uRM+Puj9HbmNMgxp6ePEp/XUldAqcial4d4QygCZFtZOyE+MrxQWd4wtn8EtFbe\n\t uS0veZmNzuWxQ==", "From": "Chuck Lever <cel@kernel.org>", "Date": "Fri, 24 Apr 2026 21:53:16 -0400", "Subject": "[PATCH v11 14/15] nfsd: Implement NFSv4 FATTR4_CASE_INSENSITIVE\n and FATTR4_CASE_PRESERVING", "Precedence": "bulk", "X-Mailing-List": "linux-cifs@vger.kernel.org", "List-Id": "<linux-cifs.vger.kernel.org>", "List-Subscribe": "<mailto:linux-cifs+subscribe@vger.kernel.org>", "List-Unsubscribe": "<mailto:linux-cifs+unsubscribe@vger.kernel.org>", "MIME-Version": "1.0", "Content-Type": "text/plain; charset=\"utf-8\"", "Content-Transfer-Encoding": "7bit", "Message-Id": "<20260424-case-sensitivity-v11-14-de5619beddaf@oracle.com>", "References": "<20260424-case-sensitivity-v11-0-de5619beddaf@oracle.com>", "In-Reply-To": "<20260424-case-sensitivity-v11-0-de5619beddaf@oracle.com>", "To": "Al Viro <viro@zeniv.linux.org.uk>,\n Christian Brauner <brauner@kernel.org>, Jan Kara <jack@suse.cz>", "Cc": "linux-fsdevel@vger.kernel.org, linux-ext4@vger.kernel.org,\n linux-xfs@vger.kernel.org, linux-cifs@vger.kernel.org,\n linux-nfs@vger.kernel.org, linux-api@vger.kernel.org,\n linux-f2fs-devel@lists.sourceforge.net, hirofumi@mail.parknet.co.jp,\n linkinjeon@kernel.org, sj1557.seo@samsung.com, yuezhang.mo@sony.com,\n almaz.alexandrovich@paragon-software.com, slava@dubeyko.com,\n glaubitz@physik.fu-berlin.de, frank.li@vivo.com, tytso@mit.edu,\n adilger.kernel@dilger.ca, cem@kernel.org, sfrench@samba.org,\n pc@manguebit.org, ronniesahlberg@gmail.com, sprasad@microsoft.com,\n trondmy@kernel.org, anna@kernel.org, jaegeuk@kernel.org, chao@kernel.org,\n hansg@kernel.org, senozhatsky@chromium.org,\n Chuck Lever <chuck.lever@oracle.com>,\n Roland Mainz <roland.mainz@nrubsig.org>", "X-Mailer": "b4 0.16-dev", "X-Developer-Signature": "v=1; a=openpgp-sha256; l=4552;\n i=chuck.lever@oracle.com; h=from:subject:message-id;\n bh=Gb++2WXxq7tymC3lSBQQTwIgZZJUrL12YzUU9YIeoRg=;\n b=owEBbQKS/ZANAwAKATNqszNvZn+XAcsmYgBp7B6RFnJh5RPlhzv8zOFhfy+P+Bn3NqH2/9JE5\n hDuPI1TwTKJAjMEAAEKAB0WIQQosuWwEobfJDzyPv4zarMzb2Z/lwUCaewekQAKCRAzarMzb2Z/\n lw2REACbr6lCxWkqB+jzxg/IBfXv10fHbhPzMCvQlZWb+dbrracqFwJuhhC4/6M9Pc73JmJ1WOl\n OCdBLrEvpPKPy898FKaA6nLBZ46ziYNeqqDSHTuqIqPRcIjGwHL0izSHHMdO33POOb+BfEd9CSe\n pnnpsnPyqYu8vlwBv7gkReIWcmGankd0OQUO2oTwiMD0+WRaFi9jfWXIzq5WQOdEtJ4Xo+GIrIm\n D3fMAPC4n2QLSl1+G+Jatxv5D1iUDpToG3lcXHjHm3U+k+mB6P5jkV6Ol9W3F5izpMq6+iaCnhe\n 1lq2f1fYB8Jjo1vasu6QJNkqZ2xfjbK0qKCz4pC1KFJEcwwBVUq4/vrK46uDY3JjDYNHof7b7tK\n +xSMFRgEdjWiaOWyJqZR3jmtruIYnAk6pkokurwbNrQs+EaUUWHS2XEqpvay+pJ9wDg/3PR2TQT\n 07eR1o6ctS8a1O1KksJMqN97jRA2nr1VsilkcXKNTVvBfJt2Bn79yNGQtjbGnYCUbaSitdi1Y1n\n OZsUgGaT38ixBRL9MWX42O8Eg4mLPYwz0jOW4jTPWNEAHEwXn0Q1LuB3HtHSPLI/L1oGJf8Z+mn\n +c08lbwUV1Gb1Ve1dcq6zQhaj5EnGgmy8eWpnFZJfr2sv03K3T3nZTHWUgtdQ1Wk91fh7hnYdCY\n Vn18aYwYyULhRzg==", "X-Developer-Key": "i=chuck.lever@oracle.com; a=openpgp;\n fpr=28B2E5B01286DF243CF23EFE336AB3336F667F97" }, "content": "From: Chuck Lever <chuck.lever@oracle.com>\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\nReviewed-by: Roland Mainz <roland.mainz@nrubsig.org>\nSigned-off-by: Chuck Lever <chuck.lever@oracle.com>\n---\n fs/nfsd/nfs4xdr.c | 55 ++++++++++++++++++++++++++++++++++++++++++++++++++++---\n 1 file changed, 52 insertions(+), 3 deletions(-)", "diff": "diff --git a/fs/nfsd/nfs4xdr.c b/fs/nfsd/nfs4xdr.c\nindex 2a0946c630e1..68b23863dab1 100644\n--- a/fs/nfsd/nfs4xdr.c\n+++ b/fs/nfsd/nfs4xdr.c\n@@ -3158,6 +3158,8 @@ 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@@ -3356,6 +3358,33 @@ 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_homogeneous(struct xdr_stream *xdr,\n+\t\t\t\t\tconst struct nfsd4_fattr_args *args)\n+{\n+\t/*\n+\t * Filesystems with a Unicode encoding loaded (e.g. ext4, f2fs\n+\t * with the casefold feature) expose case folding as a\n+\t * per-directory attribute, so the per-file-system\n+\t * case_insensitive and case_preserving values can legitimately\n+\t * differ across objects that share the same fsid. Report\n+\t * FATTR4_HOMOGENEOUS = FALSE on such filesystems to keep that\n+\t * variation consistent with RFC 8881 Section 5.8.2.16.\n+\t */\n+\treturn nfsd4_encode_bool(xdr, !sb_has_encoding(args->dentry->d_sb));\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@@ -3748,8 +3777,8 @@ 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@@ -3758,7 +3787,7 @@ static const nfsd4_enc_attr nfsd4_enc_fattr4_encode_ops[] = {\n \t[FATTR4_FILES_TOTAL]\t\t= nfsd4_encode_fattr4_files_total,\n \t[FATTR4_FS_LOCATIONS]\t\t= nfsd4_encode_fattr4_fs_locations,\n \t[FATTR4_HIDDEN]\t\t\t= nfsd4_encode_fattr4__noop,\n-\t[FATTR4_HOMOGENEOUS]\t\t= nfsd4_encode_fattr4__true,\n+\t[FATTR4_HOMOGENEOUS]\t\t= nfsd4_encode_fattr4_homogeneous,\n \t[FATTR4_MAXFILESIZE]\t\t= nfsd4_encode_fattr4_maxfilesize,\n \t[FATTR4_MAXLINK]\t\t= nfsd4_encode_fattr4_maxlink,\n \t[FATTR4_MAXNAME]\t\t= nfsd4_encode_fattr4_maxname,\n@@ -3968,6 +3997,26 @@ 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\tstruct dentry *cd = dentry;\n+\n+\t\t/*\n+\t\t * On casefold-capable file systems the flag lives\n+\t\t * on the directory, not on its entries. For a\n+\t\t * non-directory object, name-comparison semantics\n+\t\t * come from its parent. A directory (including the\n+\t\t * export root, whose parent is outside the export)\n+\t\t * is queried as-is so its own contents' lookup\n+\t\t * behaviour is reported.\n+\t\t */\n+\t\tif (!d_is_dir(dentry))\n+\t\t\tcd = dentry->d_parent;\n+\t\tstatus = nfsd_get_case_info(cd, &args.case_insensitive,\n+\t\t\t\t\t &args.case_preserving);\n+\t\tif (status != nfs_ok)\n+\t\t\tgoto out;\n+\t}\n \n \tif (attrmask[0] & FATTR4_WORD0_ACL) {\n \t\terr = nfsd4_get_nfs4_acl(rqstp, dentry, &args.acl);\n", "prefixes": [ "v11", "14/15" ] }