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GET /api/1.1/patches/2230448/?format=api
{ "id": 2230448, "url": "http://patchwork.ozlabs.org/api/1.1/patches/2230448/?format=api", "web_url": "http://patchwork.ozlabs.org/project/linux-cifs-client/patch/20260429-case-sensitivity-v12-14-8057123bebe0@oracle.com/", "project": { "id": 12, "url": "http://patchwork.ozlabs.org/api/1.1/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": "" }, "msgid": "<20260429-case-sensitivity-v12-14-8057123bebe0@oracle.com>", "date": "2026-04-29T18:07:25", "name": "[v12,14/15] nfsd: Implement NFSv4 FATTR4_CASE_INSENSITIVE and FATTR4_CASE_PRESERVING", "commit_ref": null, "pull_url": null, "state": "new", "archived": false, "hash": "9c8a9354e3000b9d398a7f7dee684ceeb0e656ad", "submitter": { "id": 86689, "url": "http://patchwork.ozlabs.org/api/1.1/people/86689/?format=api", "name": "Chuck Lever", "email": "cel@kernel.org" }, "delegate": null, "mbox": "http://patchwork.ozlabs.org/project/linux-cifs-client/patch/20260429-case-sensitivity-v12-14-8057123bebe0@oracle.com/mbox/", "series": [ { "id": 502123, "url": "http://patchwork.ozlabs.org/api/1.1/series/502123/?format=api", "web_url": "http://patchwork.ozlabs.org/project/linux-cifs-client/list/?series=502123", "date": "2026-04-29T18:07:11", "name": "Exposing case folding behavior", "version": 12, "mbox": "http://patchwork.ozlabs.org/series/502123/mbox/" } ], "comments": "http://patchwork.ozlabs.org/api/patches/2230448/comments/", "check": "pending", "checks": "http://patchwork.ozlabs.org/api/patches/2230448/checks/", "tags": {}, "headers": { "Return-Path": "\n <linux-cifs+bounces-11294-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=bK2MxXZM;\n\tdkim-atps=neutral", "legolas.ozlabs.org;\n spf=pass (sender SPF authorized) smtp.mailfrom=vger.kernel.org\n (client-ip=104.64.211.4; helo=sin.lore.kernel.org;\n envelope-from=linux-cifs+bounces-11294-incoming=patchwork.ozlabs.org@vger.kernel.org;\n receiver=patchwork.ozlabs.org)", "smtp.subspace.kernel.org;\n\tdkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org\n header.b=\"bK2MxXZM\"", "smtp.subspace.kernel.org;\n arc=none smtp.client-ip=10.30.226.201" ], "Received": [ "from sin.lore.kernel.org (sin.lore.kernel.org [104.64.211.4])\n\t(using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits)\n\t key-exchange x25519)\n\t(No client certificate requested)\n\tby legolas.ozlabs.org (Postfix) with ESMTPS id 4g5QR1724Rz1yHZ\n\tfor <incoming@patchwork.ozlabs.org>; Thu, 30 Apr 2026 04:13:33 +1000 (AEST)", "from smtp.subspace.kernel.org (conduit.subspace.kernel.org\n [100.90.174.1])\n\tby sin.lore.kernel.org (Postfix) with ESMTP id 30B993042305\n\tfor <incoming@patchwork.ozlabs.org>; Wed, 29 Apr 2026 18:08:55 +0000 (UTC)", "from localhost.localdomain (localhost.localdomain [127.0.0.1])\n\tby smtp.subspace.kernel.org (Postfix) with ESMTP id 7A92B41C318;\n\tWed, 29 Apr 2026 18:08:03 +0000 (UTC)", "from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org\n [10.30.226.201])\n\t(using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits))\n\t(No client certificate requested)\n\tby smtp.subspace.kernel.org (Postfix) with ESMTPS id 52B363FF89E;\n\tWed, 29 Apr 2026 18:08:03 +0000 (UTC)", "by smtp.kernel.org (Postfix) with ESMTPSA id C15B8C2BCC4;\n\tWed, 29 Apr 2026 18:08:00 +0000 (UTC)" ], "ARC-Seal": "i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116;\n\tt=1777486083; cv=none;\n b=o4ZW5xbiiL2z71yxYL1vyUu7tE2ObaDmSVqG7y4zTlzHc+ZMT/tSvROR8p+NO7+N5GbaHdn3mYP0gOahs9To7xgAUsnj0Hd7Y+RzwGDiY4VLCos0jXYbfxwfYQHAar9Bq3PzWM6NTybVEVC0iX/VOBS2CeR+1k+uy4RG2AWlb8k=", "ARC-Message-Signature": "i=1; a=rsa-sha256; d=subspace.kernel.org;\n\ts=arc-20240116; t=1777486083; c=relaxed/simple;\n\tbh=DMOslqY8hrgzhiEEpdlPHzlUOU2jtL44Gxm3Xa3n8gU=;\n\th=From:Date:Subject:MIME-Version:Content-Type:Message-Id:References:\n\t In-Reply-To:To:Cc;\n b=p6MhJYnlfYHMcz9AXiceVVjlxtWDN+9RLtViu9d3ju3gADWe64lPz8DUvgB8hJ76wKkcXSAmQ5pRtXi+D1qK5hjoIu+2CUkge0DNnJ/XrmQLRVip1ycMGPwaUNWZaXomu8e8nqGxd6ubvqieNWbaSSn/cQ7vcibr9EHyfcFmAOw=", "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=bK2MxXZM; 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=1777486083;\n\tbh=DMOslqY8hrgzhiEEpdlPHzlUOU2jtL44Gxm3Xa3n8gU=;\n\th=From:Date:Subject:References:In-Reply-To:To:Cc:From;\n\tb=bK2MxXZMLsCKyWAbA5jRd65cULoxSMxpWM+1P5HqbMkoFIt0SoRA6AGwLaYBql4aE\n\t pe9Ki58BFn0A9zSEw0TwNUXWTNpPUwvl5Squ6Ar/qKTaWVLX8P2BORBc/RWNyDyA3h\n\t eDnfUY+PL+qLNPYUvtrkNGlZ6AWmORXp4dQhFzuSnS65NGaoRc2GDiAOpWk5mKOJ4T\n\t Eaj6GOwVUIni6YVMPkdY9sNy95RgJYv1bnbwcxag/kKaFQdJ4MffT4RE19ps53ogOR\n\t UVCbBs180qfUrmZiV1ghU4PROgsEZ6GFFV1sL5qy/aySXOQeYWjQUsZpclbX6/AKeW\n\t LmjHxGZpFQuWA==", "From": "Chuck Lever <cel@kernel.org>", "Date": "Wed, 29 Apr 2026 14:07:25 -0400", "Subject": "[PATCH v12 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": "<20260429-case-sensitivity-v12-14-8057123bebe0@oracle.com>", "References": "<20260429-case-sensitivity-v12-0-8057123bebe0@oracle.com>", "In-Reply-To": "<20260429-case-sensitivity-v12-0-8057123bebe0@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=4565;\n i=chuck.lever@oracle.com; h=from:subject:message-id;\n bh=t5OVike6DqWKusHjBgnWfNA/dcYYQEQa2zmnV+SeSqI=;\n b=owEBbQKS/ZANAwAKATNqszNvZn+XAcsmYgBp8kjdIBXdCBmDR6d5dnOoVHD6fOHXtFo8oV4rz\n fR7xAvMR/KJAjMEAAEKAB0WIQQosuWwEobfJDzyPv4zarMzb2Z/lwUCafJI3QAKCRAzarMzb2Z/\n l6ALEACL+Ov0mGavDpGUnvHe2gm16M0/DvQ0s1tfhkdOEhbsBHjCIN5c2uf0Ei664VfP3ebcHvA\n WQL1ofIJvkdofugvUJVD8JjhmfOIXaUrCjhGgUvbax9Q+wXHD4AMOUXyotOVK2qXDakRlMZClcR\n CdpEyS7gmLYJp5CdTzliIgcanmlkEPvoD7RzJOnF5aPHiMlCtla6BewGUaFVgiwH6SV8vElvkX3\n +XafxJbEuI1V+ZTjvtRJpwbf42zoGxOPCHyu5DRvW41TLcP7GmQnYAgTZF53blvjRwCwnPbYbNk\n wfsOQCOcxKpr583GOCAMuuRr98dbVuE+Hio9ahBHX7quJYMYXquQMpXTyPklrfpZ9yH0xyO6zbR\n 9OOuifs9t5IWOPbMQ3WqG42uVr+vY5mg2s1seVnhAHC9IlqeRMwzekaiAmZQK82wmHhXDvtnzJz\n fMPjjTN5uIkv6HmdO9WeshtlJZbKXicyTPs5/m5FqhoW+TWR75Ox4WYejk8mf7Vj9YGIR0Tfita\n h2cfcJhkTGGOlXS7Yaw5a9Wmo7y06zMomFWxhEtn9I0SIajxo4qip6TRilEfv2r1ViYH+8svLAH\n YxATX8i9wIeQj6DgLUx/oButwK7+JklxJOEIgRLoJe/aQpqUoRYmAqs6T69HUTnSfMNp/olKXYO\n HlPsqHPFbsHc+ng==", "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 | 52 +++++++++++++++++++++++++++++++++++++++++++++++++---\n 1 file changed, 49 insertions(+), 3 deletions(-)", "diff": "diff --git a/fs/nfsd/nfs4xdr.c b/fs/nfsd/nfs4xdr.c\nindex 2a0946c630e1..d77304692e11 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 * Casefold-capable filesystems (e.g. ext4 or f2fs with the\n+\t * casefold feature) attach a Unicode encoding at mount time\n+\t * but apply case folding per directory. The per-file-system\n+\t * case_insensitive and case_preserving values can therefore\n+\t * legitimately differ across objects that share the same fsid.\n+\t * Report FATTR4_HOMOGENEOUS = FALSE on such filesystems to\n+\t * keep that 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 +3997,23 @@ 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\terr = nfsd_get_case_info(dentry, &args.case_insensitive,\n+\t\t\t\t\t &args.case_preserving);\n+\t\t/*\n+\t\t * SUPPORTED_ATTRS unconditionally advertises both\n+\t\t * bits, and the Linux client treats an absent\n+\t\t * CASE_PRESERVING in a GETATTR reply as false. When\n+\t\t * the filesystem does not expose case state,\n+\t\t * nfsd_get_case_info() fills POSIX defaults\n+\t\t * (case-sensitive, case-preserving) and returns\n+\t\t * -EOPNOTSUPP; encode those defaults so the reply\n+\t\t * agrees with what the server claims to support.\n+\t\t */\n+\t\tif (err && err != -EOPNOTSUPP)\n+\t\t\tgoto out_nfserr;\n+\t}\n \n \tif (attrmask[0] & FATTR4_WORD0_ACL) {\n \t\terr = nfsd4_get_nfs4_acl(rqstp, dentry, &args.acl);\n", "prefixes": [ "v12", "14/15" ] }