{"id":2232075,"url":"http://patchwork.ozlabs.org/api/1.2/patches/2232075/?format=json","web_url":"http://patchwork.ozlabs.org/project/linux-ext4/patch/20260502-case-sensitivity-v13-15-aa853140311f@oracle.com/","project":{"id":8,"url":"http://patchwork.ozlabs.org/api/1.2/projects/8/?format=json","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,"list_archive_url":"","list_archive_url_format":"","commit_url_format":""},"msgid":"<20260502-case-sensitivity-v13-15-aa853140311f@oracle.com>","list_archive_url":null,"date":"2026-05-02T14:21:00","name":"[v13,15/15] ksmbd: Report filesystem case sensitivity via FS_ATTRIBUTE_INFORMATION","commit_ref":null,"pull_url":null,"state":"new","archived":false,"hash":"bce4e31358daebdc91f39b6c2ff85905680aed70","submitter":{"id":86689,"url":"http://patchwork.ozlabs.org/api/1.2/people/86689/?format=json","name":"Chuck Lever","email":"cel@kernel.org"},"delegate":null,"mbox":"http://patchwork.ozlabs.org/project/linux-ext4/patch/20260502-case-sensitivity-v13-15-aa853140311f@oracle.com/mbox/","series":[{"id":502531,"url":"http://patchwork.ozlabs.org/api/1.2/series/502531/?format=json","web_url":"http://patchwork.ozlabs.org/project/linux-ext4/list/?series=502531","date":"2026-05-02T14:20:45","name":"Exposing case folding behavior","version":13,"mbox":"http://patchwork.ozlabs.org/series/502531/mbox/"}],"comments":"http://patchwork.ozlabs.org/api/patches/2232075/comments/","check":"pending","checks":"http://patchwork.ozlabs.org/api/patches/2232075/checks/","tags":{},"related":[],"headers":{"Return-Path":"\n ","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=bQkPGs/V;\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=1777731762;\n\tbh=qee/kCsMg8C4eRFPxmiZaknm+clMPDWXLjgwoKgpYx8=;\n\th=From:Date:Subject:References:In-Reply-To:To:Cc:From;\n\tb=bQkPGs/VClTXVe7RJWNstN5TRHFnJPur402C7r15f8ZfoCNm+mc62dH87hRvCnli9\n\t AIAkrLYBzmzx1ZL/dwfSGYCoIhV6YopiR3pphFxnwS5hPYzVlSa9UfmXValKG6W44R\n\t DNcfOtD8C2VzZ7qxgI9AqXItn6XpNLzSfGrcxfbr+cU+rPB/BQ0vLES3y3wjmW3ZWv\n\t M+z8CZmNPolQ34BzYg1vsXL6mk94AOF1GlygCWn7EEHcaN08VMHpVNdN/m5FwGl/Oj\n\t 6CBh+asEl+qCGvNJh2q7I1rPLRno2O+374hMYm+B3s+xydTaMBOM4LouQSR8cJJhCg\n\t boI+EqT0UQh7g==","From":"Chuck Lever ","Date":"Sat, 02 May 2026 10:21:00 -0400","Subject":"[PATCH v13 15/15] ksmbd: Report filesystem case sensitivity via\n FS_ATTRIBUTE_INFORMATION","Precedence":"bulk","X-Mailing-List":"linux-ext4@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":"<20260502-case-sensitivity-v13-15-aa853140311f@oracle.com>","References":"<20260502-case-sensitivity-v13-0-aa853140311f@oracle.com>","In-Reply-To":"<20260502-case-sensitivity-v13-0-aa853140311f@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 ,\n Roland Mainz ","X-Mailer":"b4 0.16-dev","X-Developer-Signature":"v=1; a=openpgp-sha256; l=2812;\n i=chuck.lever@oracle.com; h=from:subject:message-id;\n bh=3j19l6mVyr/XReBrhpdSBMPAL80WouHe9sT+TihiyQM=;\n b=owEBbQKS/ZANAwAKATNqszNvZn+XAcsmYgBp9ghR5o+RiEOKLVYs8fKHluTob3cyoRHlSuLpO\n IhopKWa5I2JAjMEAAEKAB0WIQQosuWwEobfJDzyPv4zarMzb2Z/lwUCafYIUQAKCRAzarMzb2Z/\n l0/sD/9NAN/eiWStj0uMUbgslClWKS0KXDa0CJiGF0vGNQ20tWI3HeSmZA6JphPx39504bWoStu\n U9abYmvZJr2BB5PC4nQBaHFd09QP2X5/zKhHQqVZHoiVU3ItQaxgCb2NBKFtfZ4eSbqMhy87g0C\n TceN7w3DgaKI5qtIbS2DrEck538I04k6SclOw4jDJAKkQ0s9v2VQK46AiT8zfLpZtKxyD3TBLj1\n bR6RuhpvU1Wba5LSR3E5nRAtIkj6Yd29JVJRbFsvVOj5b1s66Gt1iWZ/IpOXqd3akt5SsfF2uXQ\n TDBUbFUGkRZJKUlIAOdLm4K3psQ9mwISzEurgdO8wmzaAxLM6FvKbNDv99JoOOX73sJpsYEzRMd\n G/BRCdUN5Rb3J51anmd1cEoxYQy4mVTySi/L2HdVIOeoOrfgAlpYMm+RB2gAc8Y5uIMqYgjZnBb\n 4ydECc0FI1ya4xsU8jkEUmU9ZczhuATaFNT3YYkiN6deNgqMIq7Mtqxe4thwfTdsX9BJ1lPtX6I\n 6WmShv8pUqdjPIAcS++OpNuLb65oDOIcELEqXpjGkbj30nBBjmN8meuU0MQMwKtQzj20V82Xkv9\n URfRjBYVKorxQuwwUEHwPjt0xH2wdwnW5eBfDnf7zECnmHgLNF6Cb/txRqw79dQ7h9e/ZiFHrYt\n BIs73uA2+CXMpqA==","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 \n\nFS_ATTRIBUTE_INFORMATION responses have always reported\nFILE_CASE_SENSITIVE_SEARCH and FILE_CASE_PRESERVED_NAMES\nunconditionally. Case-insensitive filesystems like exFAT, and\ncasefolded directories on ext4 or f2fs, have no way to signal\ntheir actual semantics to SMB clients.\n\nNow that filesystems expose case behavior through ->fileattr_get,\nquery it via vfs_fileattr_get() and translate the FS_XFLAG_CASEFOLD\nand FS_XFLAG_CASENONPRESERVING flags into the corresponding SMB\nattributes. Filesystems without ->fileattr_get continue reporting\ndefault POSIX behavior (case-sensitive, case-preserving).\n\nSMB's FS_ATTRIBUTE_INFORMATION reports per-share attributes from\nthe share root, not per-file. Shares mixing casefold and\nnon-casefold directories report the root directory's behavior.\n\nAcked-by: Namjae Jeon \nReviewed-by: Roland Mainz \nSigned-off-by: Chuck Lever \n---\n fs/smb/server/smb2pdu.c | 30 ++++++++++++++++++++++++------\n 1 file changed, 24 insertions(+), 6 deletions(-)","diff":"diff --git a/fs/smb/server/smb2pdu.c b/fs/smb/server/smb2pdu.c\nindex ee32e61b6d3c..cf0bc453a036 100644\n--- a/fs/smb/server/smb2pdu.c\n+++ b/fs/smb/server/smb2pdu.c\n@@ -14,6 +14,7 @@\n #include \n #include \n #include \n+#include \n \n #include \"glob.h\"\n #include \"smbfsctl.h\"\n@@ -5541,16 +5542,33 @@ static int smb2_get_info_filesystem(struct ksmbd_work *work,\n \tcase FS_ATTRIBUTE_INFORMATION:\n \t{\n \t\tFILE_SYSTEM_ATTRIBUTE_INFO *info;\n+\t\tstruct file_kattr fa = {};\n \t\tsize_t sz;\n+\t\tu32 attrs;\n+\t\tint err;\n \n \t\tinfo = (FILE_SYSTEM_ATTRIBUTE_INFO *)rsp->Buffer;\n-\t\tinfo->Attributes = cpu_to_le32(FILE_SUPPORTS_OBJECT_IDS |\n-\t\t\t\t\t FILE_PERSISTENT_ACLS |\n-\t\t\t\t\t FILE_UNICODE_ON_DISK |\n-\t\t\t\t\t FILE_CASE_PRESERVED_NAMES |\n-\t\t\t\t\t FILE_CASE_SENSITIVE_SEARCH |\n-\t\t\t\t\t FILE_SUPPORTS_BLOCK_REFCOUNTING);\n+\t\tattrs = FILE_SUPPORTS_OBJECT_IDS |\n+\t\t\tFILE_PERSISTENT_ACLS |\n+\t\t\tFILE_UNICODE_ON_DISK |\n+\t\t\tFILE_SUPPORTS_BLOCK_REFCOUNTING;\n \n+\t\terr = vfs_fileattr_get(path.dentry, &fa);\n+\t\t/*\n+\t\t * -EINVAL, -EOPNOTSUPP: ntfs-3g and other FUSE\n+\t\t * filesystems that lack FS_IOC_FSGETXATTR support.\n+\t\t */\n+\t\tif (err && err != -ENOIOCTLCMD && err != -ENOTTY &&\n+\t\t err != -EINVAL && err != -EOPNOTSUPP) {\n+\t\t\tpath_put(&path);\n+\t\t\treturn err;\n+\t\t}\n+\t\tif (!(fa.fsx_xflags & FS_XFLAG_CASEFOLD))\n+\t\t\tattrs |= FILE_CASE_SENSITIVE_SEARCH;\n+\t\tif (!(fa.fsx_xflags & FS_XFLAG_CASENONPRESERVING))\n+\t\t\tattrs |= FILE_CASE_PRESERVED_NAMES;\n+\n+\t\tinfo->Attributes = cpu_to_le32(attrs);\n \t\tinfo->Attributes |= cpu_to_le32(server_conf.share_fake_fscaps);\n \n \t\tif (test_share_config_flag(work->tcon->share_conf,\n","prefixes":["v13","15/15"]}