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GET /api/1.1/patches/2230432/?format=api
{ "id": 2230432, "url": "http://patchwork.ozlabs.org/api/1.1/patches/2230432/?format=api", "web_url": "http://patchwork.ozlabs.org/project/linux-ext4/patch/20260429-case-sensitivity-v12-2-8057123bebe0@oracle.com/", "project": { "id": 8, "url": "http://patchwork.ozlabs.org/api/1.1/projects/8/?format=api", "name": "Linux ext4 filesystem development", "link_name": "linux-ext4", "list_id": "linux-ext4.vger.kernel.org", "list_email": "linux-ext4@vger.kernel.org", "web_url": null, "scm_url": null, "webscm_url": null }, "msgid": "<20260429-case-sensitivity-v12-2-8057123bebe0@oracle.com>", "date": "2026-04-29T18:07:13", "name": "[v12,02/15] fs: Add case sensitivity flags to file_kattr", "commit_ref": null, "pull_url": null, "state": "new", "archived": false, "hash": "88be93badfa2c2c076765ad8e678c7bbe57ce420", "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-ext4/patch/20260429-case-sensitivity-v12-2-8057123bebe0@oracle.com/mbox/", "series": [ { "id": 502125, "url": "http://patchwork.ozlabs.org/api/1.1/series/502125/?format=api", "web_url": "http://patchwork.ozlabs.org/project/linux-ext4/list/?series=502125", "date": "2026-04-29T18:07:11", "name": "Exposing case folding behavior", "version": 12, "mbox": "http://patchwork.ozlabs.org/series/502125/mbox/" } ], "comments": "http://patchwork.ozlabs.org/api/patches/2230432/comments/", "check": "pending", "checks": "http://patchwork.ozlabs.org/api/patches/2230432/checks/", "tags": {}, "headers": { "Return-Path": "\n <SRS0=mEQW=C4=vger.kernel.org=linux-ext4+bounces-16230-patchwork-incoming=ozlabs.org@ozlabs.org>", "X-Original-To": [ "incoming@patchwork.ozlabs.org", "linux-ext4@vger.kernel.org" ], "Delivered-To": [ "patchwork-incoming@legolas.ozlabs.org", "patchwork-incoming@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=gtlk0sWZ;\n\tdkim-atps=neutral", "legolas.ozlabs.org;\n spf=pass (sender SPF authorized) smtp.mailfrom=ozlabs.org\n (client-ip=2404:9400:2221:ea00::3; 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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=1777486053;\n\tbh=TFF/jZiZrtLjdmF8xjSA6CfyQJOvsGBZ0ycggreXc9A=;\n\th=From:Date:Subject:References:In-Reply-To:To:Cc:From;\n\tb=gtlk0sWZirOJEmjPERIWRgbfl0qD6tHXGeh7oOuX45UeQ9NEADoZsAqLKMkWio9Xq\n\t Jbx4ewCqaKOcIi+bPySlCfugoDe+j4lQe4n08eU0rhIcox86+BXeqv389KXKpkplsa\n\t GmVKzkyFRs7XRpXCalme6e/IEsfmq9uxL/SebIY2cSNFrZSK3UxdMunp++huPzDKpW\n\t /r5vXd8iXUZV1PbgOqu7zbw98atwmnDvciEUVx1wybD8Zel8RPeO2+6ZWOgVFAdH6x\n\t 9G6UFXORNpqr22QtxI2ojpNDL35hEu/Q6yxbRqP6chlcEvMPK7O+QdfoTd5iFmoyrq\n\t Ztb8YAdQlm+hA==", "From": "Chuck Lever <cel@kernel.org>", "Date": "Wed, 29 Apr 2026 14:07:13 -0400", "Subject": "[PATCH v12 02/15] fs: Add case sensitivity flags to file_kattr", "Precedence": "bulk", "X-Mailing-List": "linux-ext4@vger.kernel.org", "List-Id": "<linux-ext4.vger.kernel.org>", "List-Subscribe": "<mailto:linux-ext4+subscribe@vger.kernel.org>", "List-Unsubscribe": "<mailto:linux-ext4+unsubscribe@vger.kernel.org>", "MIME-Version": "1.0", "Content-Type": "text/plain; charset=\"utf-8\"", "Content-Transfer-Encoding": "7bit", "Message-Id": "<20260429-case-sensitivity-v12-2-8057123bebe0@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>, \"Darrick J. Wong\" <djwong@kernel.org>,\n Roland Mainz <roland.mainz@nrubsig.org>", "X-Mailer": "b4 0.16-dev", "X-Developer-Signature": "v=1; a=openpgp-sha256; l=3394;\n i=chuck.lever@oracle.com; h=from:subject:message-id;\n bh=42BtA/ECrX4U52i4InslT9hET7DZ27jCO0bDUKFKJW4=;\n b=owEBbQKS/ZANAwAKATNqszNvZn+XAcsmYgBp8kjch3cGQIgHJck6KG7+aESHyo+miQFfRTg/6\n rhWGI1J6HCJAjMEAAEKAB0WIQQosuWwEobfJDzyPv4zarMzb2Z/lwUCafJI3AAKCRAzarMzb2Z/\n l1TND/9A1OSEiUzD6eNUWvBKNgUALci173PIU7VQxL07GtB434XDJvQiYqCSRfzB8tUTF1xYA0W\n W+M/MXICHT5BxJyYwYJRHP9Fxs8Xb3iM06fCbk/6x1vB/Io/AzWNbyQIi+Xlgjl6reDPDeYKVxU\n 68SLdJon9yLFnOP+KH/HQOpxtOaMvr+YzRldHotL7myqsh+GU0UD+PulUSlviyp+LvepFo4JUAU\n bEEsGmj7OP98FwOnU1cQjqXjhGDD62ebgKb8qtKrpNXcYPu4IvlPXf3ZBDaELEIMBmNPP+/ciju\n AehTGGBDUIX6fm/Uc/skxU6BqPdGhpwydP0cHfPAiRDCnNQs3g+K67Y6DCkC5KNc3cnh73RWTra\n U+Nxve9ZBgUKM9DxgTUmqvX8z/XQ6L7iGHN7w/RbC3dTWo/9SMJHcKOs9wme7sm41K7gSTQ8FdV\n vJ2rBdGM+EIrz4oJLBFbh2EXnEvwMPVNt1umnF9znjoOVhItsoqF1sww/87Ghz7mIS6bM21cGSd\n ncBQLK+PF929LE5BqMBXjwA7KO9VNPFxs+ZOvR1eDbp+IewrniUGzttR9Kjc8uHEj7XMN2FcAZG\n BryriSkS5CD9eFfH8QK2LcG0S7UdMJTVB82JTUwFZ6EtPioOrhQXyDqjIRkBFbpy87MHALMHESq\n AuoDWVm4JlOQGzQ==", "X-Developer-Key": "i=chuck.lever@oracle.com; a=openpgp;\n fpr=28B2E5B01286DF243CF23EFE336AB3336F667F97", "X-Spam-Status": "No, score=-1.2 required=5.0 tests=ARC_SIGNED,ARC_VALID,\n\tDKIMWL_WL_HIGH,DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,DMARC_PASS,\n\tMAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS autolearn=disabled\n\tversion=4.0.1", "X-Spam-Checker-Version": "SpamAssassin 4.0.1 (2024-03-25) on gandalf.ozlabs.org" }, "content": "From: Chuck Lever <chuck.lever@oracle.com>\n\nEnable upper layers such as NFSD to retrieve case sensitivity\ninformation from file systems by adding FS_XFLAG_CASEFOLD and\nFS_XFLAG_CASENONPRESERVING flags.\n\nFilesystems report case-insensitive or case-nonpreserving behavior\nby setting these flags directly in fa->fsx_xflags. The default\n(flags unset) indicates POSIX semantics: case-sensitive and\ncase-preserving. Both flags are added to FS_XFLAG_RDONLY_MASK so\nFS_IOC_FSSETXATTR silently strips them, keeping the new xflags\nstrictly a reporting interface. Callers that want to toggle\ncasefolding continue to use FS_IOC_SETFLAGS with FS_CASEFOLD_FL,\nthe established UAPI on filesystems that support the operation\n(ext4 and f2fs on empty directories).\n\nCase sensitivity information is exported to userspace via the\nfa_xflags field in the FS_IOC_FSGETXATTR ioctl and file_getattr()\nsystem call.\n\nReviewed-by: \"Darrick J. Wong\" <djwong@kernel.org>\nReviewed-by: Jan Kara <jack@suse.cz>\nReviewed-by: Roland Mainz <roland.mainz@nrubsig.org>\nSigned-off-by: Chuck Lever <chuck.lever@oracle.com>\n---\n fs/file_attr.c | 4 ++++\n include/linux/fileattr.h | 3 ++-\n include/uapi/linux/fs.h | 7 +++++++\n 3 files changed, 13 insertions(+), 1 deletion(-)", "diff": "diff --git a/fs/file_attr.c b/fs/file_attr.c\nindex f429da66a317..bfb00d256dd5 100644\n--- a/fs/file_attr.c\n+++ b/fs/file_attr.c\n@@ -37,6 +37,8 @@ void fileattr_fill_xflags(struct file_kattr *fa, u32 xflags)\n \t\tfa->flags |= FS_PROJINHERIT_FL;\n \tif (fa->fsx_xflags & FS_XFLAG_VERITY)\n \t\tfa->flags |= FS_VERITY_FL;\n+\tif (fa->fsx_xflags & FS_XFLAG_CASEFOLD)\n+\t\tfa->flags |= FS_CASEFOLD_FL;\n }\n EXPORT_SYMBOL(fileattr_fill_xflags);\n \n@@ -67,6 +69,8 @@ void fileattr_fill_flags(struct file_kattr *fa, u32 flags)\n \t\tfa->fsx_xflags |= FS_XFLAG_PROJINHERIT;\n \tif (fa->flags & FS_VERITY_FL)\n \t\tfa->fsx_xflags |= FS_XFLAG_VERITY;\n+\tif (fa->flags & FS_CASEFOLD_FL)\n+\t\tfa->fsx_xflags |= FS_XFLAG_CASEFOLD;\n }\n EXPORT_SYMBOL(fileattr_fill_flags);\n \ndiff --git a/include/linux/fileattr.h b/include/linux/fileattr.h\nindex 3780904a63a6..58044b598016 100644\n--- a/include/linux/fileattr.h\n+++ b/include/linux/fileattr.h\n@@ -16,7 +16,8 @@\n \n /* Read-only inode flags */\n #define FS_XFLAG_RDONLY_MASK \\\n-\t(FS_XFLAG_PREALLOC | FS_XFLAG_HASATTR | FS_XFLAG_VERITY)\n+\t(FS_XFLAG_PREALLOC | FS_XFLAG_HASATTR | FS_XFLAG_VERITY | \\\n+\t FS_XFLAG_CASEFOLD | FS_XFLAG_CASENONPRESERVING)\n \n /* Flags to indicate valid value of fsx_ fields */\n #define FS_XFLAG_VALUES_MASK \\\ndiff --git a/include/uapi/linux/fs.h b/include/uapi/linux/fs.h\nindex 13f71202845e..2ea4c81df08f 100644\n--- a/include/uapi/linux/fs.h\n+++ b/include/uapi/linux/fs.h\n@@ -254,6 +254,13 @@ struct file_attr {\n #define FS_XFLAG_DAX\t\t0x00008000\t/* use DAX for IO */\n #define FS_XFLAG_COWEXTSIZE\t0x00010000\t/* CoW extent size allocator hint */\n #define FS_XFLAG_VERITY\t\t0x00020000\t/* fs-verity enabled */\n+/*\n+ * Case handling flags (read-only, cannot be set via ioctl).\n+ * Default (neither set) indicates POSIX semantics: case-sensitive\n+ * lookups and case-preserving storage.\n+ */\n+#define FS_XFLAG_CASEFOLD\t0x00040000\t/* case-insensitive lookups */\n+#define FS_XFLAG_CASENONPRESERVING 0x00080000\t/* case not preserved */\n #define FS_XFLAG_HASATTR\t0x80000000\t/* no DIFLAG for this\t*/\n \n /* the read-only stuff doesn't really belong here, but any other place is\n", "prefixes": [ "v12", "02/15" ] }