{"id":2226980,"url":"http://patchwork.ozlabs.org/api/patches/2226980/?format=json","web_url":"http://patchwork.ozlabs.org/project/linux-cifs-client/patch/20260422-case-sensitivity-v9-2-be023cc070e2@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":"<20260422-case-sensitivity-v9-2-be023cc070e2@oracle.com>","list_archive_url":null,"date":"2026-04-22T23:29:56","name":"[v9,02/17] 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/20260422-case-sensitivity-v9-2-be023cc070e2@oracle.com/mbox/","series":[{"id":501130,"url":"http://patchwork.ozlabs.org/api/series/501130/?format=json","web_url":"http://patchwork.ozlabs.org/project/linux-cifs-client/list/?series=501130","date":"2026-04-22T23:29:54","name":"Exposing case folding behavior","version":9,"mbox":"http://patchwork.ozlabs.org/series/501130/mbox/"}],"comments":"http://patchwork.ozlabs.org/api/patches/2226980/comments/","check":"pending","checks":"http://patchwork.ozlabs.org/api/patches/2226980/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=ngex4nC0;\n\tdkim-atps=neutral","legolas.ozlabs.org;\n spf=pass (sender SPF authorized) smtp.mailfrom=vger.kernel.org\n (client-ip=172.234.253.10; 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a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116;\n\tt=1776900622; cv=none;\n b=PbNuqVmWlNs6E3Qi2tT6NVYk6f4VbAnFlsqCbemtsrfvjSfHIfEIhmD5t+XcratJwQfizSYlxCjyMNp+9hPymRz7KS+sf7s5nIxfRkmIrFSI825nBSblzLKVIVN7GbsPmnshquc2b8cxYWTZ6iEGABSSKnp/oXwk2bKM3x6XSJg=","ARC-Message-Signature":"i=1; a=rsa-sha256; d=subspace.kernel.org;\n\ts=arc-20240116; t=1776900622; c=relaxed/simple;\n\tbh=uytnG4T41lmij4usJJKWFHkDGf7l9bOy8F5b+Jr0Bz8=;\n\th=From:Date:Subject:MIME-Version:Content-Type:Message-Id:References:\n\t In-Reply-To:To:Cc;\n b=YoId8W7pVepkx1Z4zEJLTToDc5xBGXgPOEul1f4sy6MxfjPYyadgZtksiLoqL77nnJZ1tTgSP0cObfQlVJWhhjQ1MKT71m77wRRNRmcA/qlLfOcltp9tk3elT2hFPq1ddHBWZXAbM2xyXV65uNvkf/NQJLvON6/VAl+RcsVH7z8=","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=ngex4nC0; 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=1776900622;\n\tbh=uytnG4T41lmij4usJJKWFHkDGf7l9bOy8F5b+Jr0Bz8=;\n\th=From:Date:Subject:References:In-Reply-To:To:Cc:From;\n\tb=ngex4nC0VVrNAo5mw+72SuWXiDcV74tTuNdtVOwaDfEbcNRwf9gNdBNUg3v5BdmNt\n\t j1X83Pro3ZJBaPBP2/t43CauNjGcLGCMqfvjGMB/1t8Cu9L56KFREx7YBarEuFASo+\n\t KH9xqh3X6g5SeR77yZ20bQ2PhVnCK/Jl7NnoXELn4mZuuLmevcUEuZd283k+16jvU5\n\t ZYFxhTxpGubkcaY7lQbhpm4hSblmakq8t0eAkkSFhBF/71U4nT3WS0hgUPRzNiacwB\n\t iwy5YPxVMX09+PhoeDMmHs8p6AIvg5vgoYNqBwXIAidL72ne84/vQZweQPVtm1Iz2b\n\t N00H+eeqqKYqQ==","From":"Chuck Lever ","Date":"Wed, 22 Apr 2026 19:29:56 -0400","Subject":"[PATCH v9 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":"<20260422-case-sensitivity-v9-2-be023cc070e2@oracle.com>","References":"<20260422-case-sensitivity-v9-0-be023cc070e2@oracle.com>","In-Reply-To":"<20260422-case-sensitivity-v9-0-be023cc070e2@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=3063;\n i=chuck.lever@oracle.com; h=from:subject:message-id;\n bh=sEgEaAVKkk3OcJq+fmpgufZDvvVtq2OzcLqvqCXcHKQ=;\n b=owEBbQKS/ZANAwAKATNqszNvZn+XAcsmYgBp6VoFS16vtgH3TX9/MlKIt0UPwe9oTupY7K4XZ\n FKcQg0AtR+JAjMEAAEKAB0WIQQosuWwEobfJDzyPv4zarMzb2Z/lwUCaelaBQAKCRAzarMzb2Z/\n l/dGEACO5DxHKVVVOf2qk2IsxSXIeTaH2XRX84xMfJeZ63ZrvUUXoVF+G+OtN+NDWg4m9WswVuC\n VbEHnm93dBdgWUtHFd9R3A1uo679Nn2FV+1iObWn6yuWcPlWF1+FJV3n6nOne6U/c5B8x7BtOSY\n yqwei18I4bgVgJ0oHmwo3XJdPQgfboTZVI/u+9E4P7eBxvZD/Tk3/43trbvBnrBiCO1GUFRc+w9\n yU7KdGz2aEYEsn9Wlm+CSc+FtR9qhBj3U1cxf+YtJ1EupPF6suBR97duPzNKbfPrbjqYjGIJyrb\n XL3osbDPb+xUmUkc6lQEtJBJriwowZOejHW5SWFlDC/1P6U11U+NyTAr7ona3S5hKim2QxuvJPo\n x2DaNO3BsC1pTs7138R+/aJM4z6ToDRfZMP6KqAhQcDce4VIDmjnsyM4oe+7OuBgl2h2jTv118D\n kMnS1PxbAvHYNcN/lHkJxhLwFA4RgJ/THdEfmf7vOfS0OquBUVKf6O36Pjv6GOvCRUjM9MuSyex\n EBRb4LsKoOUhCgcj6vNOSH8yoNQvNAQSDFqlk1J1G63bj5DYo+SdOWbJq41FwF01O/IoHtFrLJe\n 8Y5fk+NNHWvCN3SQWXrY26QoMC6/ATimUztTTgu6pmcHx0WfRYhnSnP6DPbA9NeILmlScSir2ot\n oFUnpfyWCrmsAoQ==","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. These flags are read-only; userspace cannot set\nthem via ioctl.\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":["v9","02/17"]}