{"id":2230447,"url":"http://patchwork.ozlabs.org/api/1.1/patches/2230447/?format=json","web_url":"http://patchwork.ozlabs.org/project/linux-ext4/patch/20260429-case-sensitivity-v12-15-8057123bebe0@oracle.com/","project":{"id":8,"url":"http://patchwork.ozlabs.org/api/1.1/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},"msgid":"<20260429-case-sensitivity-v12-15-8057123bebe0@oracle.com>","date":"2026-04-29T18:07:26","name":"[v12,15/15] 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/1.1/people/86689/?format=json","name":"Chuck Lever","email":"cel@kernel.org"},"delegate":null,"mbox":"http://patchwork.ozlabs.org/project/linux-ext4/patch/20260429-case-sensitivity-v12-15-8057123bebe0@oracle.com/mbox/","series":[{"id":502125,"url":"http://patchwork.ozlabs.org/api/1.1/series/502125/?format=json","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/2230447/comments/","check":"pending","checks":"http://patchwork.ozlabs.org/api/patches/2230447/checks/","tags":{},"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=cp7aPOO+;\n\tdkim-atps=neutral","legolas.ozlabs.org;\n spf=pass (sender SPF authorized) smtp.mailfrom=ozlabs.org\n (client-ip=150.107.74.76; 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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=1777486085;\n\tbh=qee/kCsMg8C4eRFPxmiZaknm+clMPDWXLjgwoKgpYx8=;\n\th=From:Date:Subject:References:In-Reply-To:To:Cc:From;\n\tb=cp7aPOO+0dpAl5comMlMldcJa1APBJg4dyIBsWMJ2dtOrQbwWwziadV1HHKwrhyO2\n\t EKu4+yuEtoA6jUBez4Y0IWm7LnpjZ7KIQ0cKbWX4NFBhaQoo8h8ksY6WyypcBJIiWf\n\t YVKLHIwg3nRuxX0c7vGmZp0keEDeDDm30aZiICMEh6w5Ltf7b9eGdLSsN7GUeHd2RO\n\t KG8J5iHDbC2xwSoCytBzBwqRmnDRaD72VrktoFD4aXdoNzEgYb39fr+hiUjydoGqNK\n\t eZvAfEO7UeiBTmVpcpqsgS3jMPggCeKbV1zsEWMalElaMbD0tnnbSQkclFiQ1gT2dT\n\t +Oqta2nmBEIpg==","From":"Chuck Lever ","Date":"Wed, 29 Apr 2026 14:07:26 -0400","Subject":"[PATCH v12 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":"<20260429-case-sensitivity-v12-15-8057123bebe0@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 ,\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+XAcsmYgBp8kjdM8DNWFfItbp41H9vWWe4sjWWzOyQ+8ADF\n lrE33haaFeJAjMEAAEKAB0WIQQosuWwEobfJDzyPv4zarMzb2Z/lwUCafJI3QAKCRAzarMzb2Z/\n l6qCD/49AW4062WfbZHsVpGZySPK2wkZN4kfzlroTWbJi5jHIlMQIwp5bYVt4lATNx2xi3HKgCa\n yItm/0qjXDMJPU9Fn94bdyvedMVogpUZIY/ZRViPTT9ruiASIFp9YTJaUFH3gm+q6lKMGGueSfn\n Z8EN2By/rS44QT2tQtZeRQg+zuoeN0qOLicrbGM8Ug4pCtBZ8RgpvTKfaLyrnDSp4V386qjxeSF\n m6/1X0kKy/gtY/4vezUg9HU0vMFe/Z8hWm7GM3FiUBaQtO3NkImZILcblBqflbk1iwbr7Qyj/ZN\n GolZ7i6mSX43sZPXu2qZvJcXrsjI2l1ZrjkAcd2TiNhxk01B8C29+OkVaZDoYfOFPJ7cem1CUkD\n yF4wuNlaIqyfQ7wUC2gDXnZx464eKD6yuPpBqLgQh5Shi11DAwcJh+bESsAO0t8+6/KX8qiwJ+D\n FmGWua4a6ZHifxfcGv//3z8Lqg/FuYL/G/tSGUlJR3ucsFKGHFkl58j6LSSMV6/nXs5C/WsGKGX\n BXuIrC5tVEveeTCH07Efv3p8TfnjaJqw+kQMv4dnuhYU1F4RwUb/4o3W2yBHobxSWo9aYMfSm/7\n xCr9iOFnAKJYKyohvVvXxada0v9urbMpe8ELrwuwZW6XK/aKH29m1vV2wOnVmP/IH9CA5qJVTgt\n LYV9F6XEAovyiZQ==","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":["v12","15/15"]}