{"id":2227320,"url":"http://patchwork.ozlabs.org/api/patches/2227320/?format=json","web_url":"http://patchwork.ozlabs.org/project/linux-cifs-client/patch/20260423-case-sensitivity-v10-2-c385d674a6cf@oracle.com/","project":{"id":12,"url":"http://patchwork.ozlabs.org/api/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":"","list_archive_url":"","list_archive_url_format":"","commit_url_format":""},"msgid":"<20260423-case-sensitivity-v10-2-c385d674a6cf@oracle.com>","list_archive_url":null,"date":"2026-04-23T13:12:05","name":"[v10,02/17] 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/people/86689/?format=json","name":"Chuck Lever","email":"cel@kernel.org"},"delegate":null,"mbox":"http://patchwork.ozlabs.org/project/linux-cifs-client/patch/20260423-case-sensitivity-v10-2-c385d674a6cf@oracle.com/mbox/","series":[{"id":501195,"url":"http://patchwork.ozlabs.org/api/series/501195/?format=json","web_url":"http://patchwork.ozlabs.org/project/linux-cifs-client/list/?series=501195","date":"2026-04-23T13:12:06","name":"Exposing case folding behavior","version":10,"mbox":"http://patchwork.ozlabs.org/series/501195/mbox/"}],"comments":"http://patchwork.ozlabs.org/api/patches/2227320/comments/","check":"pending","checks":"http://patchwork.ozlabs.org/api/patches/2227320/checks/","tags":{},"related":[],"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=q+8CNK6T;\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=1776949948; cv=none;\n b=V6UWOROPiK9PSbBo+a5idc4IUkQxA1O6ynucpfyIB/a1IHfL61dxN9nTC6MRD+VlRNHsAdEINz/s/CT65l3LSNJ5jrl7kohb+Rd2LGGnjvxCjlXhIB555SwlV4SXgYmxZJjL8ixnbdJEsi5OA3J6c/0+N1dPj7Tx6CrSj870/Ls=","ARC-Message-Signature":"i=1; a=rsa-sha256; d=subspace.kernel.org;\n\ts=arc-20240116; t=1776949948; c=relaxed/simple;\n\tbh=7UJbZffIRnlSy1BsD5KTY53QnosRcT5XUdA8rzeY0m0=;\n\th=From:Date:Subject:MIME-Version:Content-Type:Message-Id:References:\n\t In-Reply-To:To:Cc;\n b=BEyBoke696C/ZiW60xcZP4F5XWH9iteiuIiuGtEY05dxOy45kCTgFM4qMXhkr/iOXgTPDwLUzZSE+i/GEA2jC4X9/f3iUgYXdFlPQHC7GhHPfmiodsAxGoaBBwcobToRa5huzZDUW0DNgCypMS0ej0cnZGHhbRpnZqVf1HbB38Q=","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=q+8CNK6T; 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=1776949948;\n\tbh=7UJbZffIRnlSy1BsD5KTY53QnosRcT5XUdA8rzeY0m0=;\n\th=From:Date:Subject:References:In-Reply-To:To:Cc:From;\n\tb=q+8CNK6Ty1dPCj32YKi12DJgeuILKAnyBRpIlf61cLnK+RTqGqCnujyiqkeOrrFXz\n\t jDJaAVYPzupJ+M1eAimqvkTh1Uy0GVdjZEgu6V3rfHDTtnPANI356Rq3gpJOGGlaIC\n\t E0u10VS6jFOzMiom2mPikCIFd3TmIYnl8LyN9ypBQK1ekAGuAy3zfPL7aFMAICKYiK\n\t 1bB9gbxlFshmLeVglyRw/tGHFmcpryFso/LsH1EM3QF3XzfwkBoHtEEMimYZcEfsjg\n\t ve1hOkdmg5ymqaE//AwwPVzvWAJ3qA+aE5KG89uv4GT/o3wtAsT24mcDO4HAsvekWU\n\t eSBZzk/RyUuWA==","From":"Chuck Lever ","Date":"Thu, 23 Apr 2026 09:12:05 -0400","Subject":"[PATCH v10 02/17] fs: Add case sensitivity flags to file_kattr","Precedence":"bulk","X-Mailing-List":"linux-cifs@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":"<20260423-case-sensitivity-v10-2-c385d674a6cf@oracle.com>","References":"<20260423-case-sensitivity-v10-0-c385d674a6cf@oracle.com>","In-Reply-To":"<20260423-case-sensitivity-v10-0-c385d674a6cf@oracle.com>","To":"Al Viro ,\n Christian Brauner , Jan Kara ","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 , \"Darrick J. Wong\" ","X-Mailer":"b4 0.16-dev","X-Developer-Signature":"v=1; a=openpgp-sha256; l=3340;\n i=chuck.lever@oracle.com; h=from:subject:message-id;\n bh=+pPurO/+pD2WfwcHWQv0N9xleXhBqxhdJ6hocARUJZ4=;\n b=owEBbQKS/ZANAwAKATNqszNvZn+XAcsmYgBp6hqzV4rncvMnfwromfgLGjORebeuYGgqBGxix\n MODx4f0YwiJAjMEAAEKAB0WIQQosuWwEobfJDzyPv4zarMzb2Z/lwUCaeoaswAKCRAzarMzb2Z/\n lzuJD/9oett156EXicv6rkJiFAEDCXWQPISxbLgBsKNereRLdeoxArncX+k2TCH+NNCNpGYhmsF\n 5rPmzbKsSI4Z8YDHcVcOWFN+uc2KC75iTOUgDQnRLF0dX4wUOCBmozE2jn6XI8McHNRY7B1illr\n z5PX3hGmxY/cfyb5aW9G8383RS1L7a0Z2aymfxPFQVQfM24ugoZ9D4VzTNLiwTQqSGHnuIuvyzD\n eK91r1zb1mYmsRfCOkpEL+3DyA5riUUsJF1x9c9Z/9L4ZVbrEMvTt0s+GIfDUYGTgEBBztfl+PC\n AC3nxLcV8c13VwPMY43FHJyku2am/FL9snNRum6RYgrLQfPnitU/Hj8ZOIOOdVCNO6Y9/uZyh1y\n 3n3Sixh3N06mfvsFwVTqT2XG9KC2e8oEB/Ptlw+Lbu84Zv2z4Zp9uTrk4aN37W4gJ9ZQ6Idu74O\n DM+RdPFyt46ik79+6nMzg5M0ODNO5TsygyN5jXHPfM4Lw7scpGMAvCvJ46rP25FA4cGL2jli7zw\n uEKwAlEc6Qe6NPfUjIAbQPad8gGz84jgGgbVLaQmQJcbW8onIwSIOjA3ECF9YyX14wxV29TJCS4\n mLeQMaVYq43CvDhrjWyaSeyo0eWci5orp7Xw0z3rXLUbHJGRYYvVYjqKlJtbuUAjlAZHPFF9VgC\n 5whXS5Ywg643qhQ==","X-Developer-Key":"i=chuck.lever@oracle.com; a=openpgp;\n fpr=28B2E5B01286DF243CF23EFE336AB3336F667F97"},"content":"From: Chuck Lever \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\" \nReviewed-by: Jan Kara \nSigned-off-by: Chuck Lever \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":["v10","02/17"]}