{"id":2227332,"url":"http://patchwork.ozlabs.org/api/patches/2227332/?format=json","web_url":"http://patchwork.ozlabs.org/project/linux-ext4/patch/20260423-case-sensitivity-v10-10-c385d674a6cf@oracle.com/","project":{"id":8,"url":"http://patchwork.ozlabs.org/api/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":"<20260423-case-sensitivity-v10-10-c385d674a6cf@oracle.com>","list_archive_url":null,"date":"2026-04-23T13:12:13","name":"[v10,10/17] cifs: Implement fileattr_get for case sensitivity","commit_ref":null,"pull_url":null,"state":"not-applicable","archived":false,"hash":"b517beaad29cf08b55eb8dea11a98d367e9c20a4","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-ext4/patch/20260423-case-sensitivity-v10-10-c385d674a6cf@oracle.com/mbox/","series":[{"id":501194,"url":"http://patchwork.ozlabs.org/api/series/501194/?format=json","web_url":"http://patchwork.ozlabs.org/project/linux-ext4/list/?series=501194","date":"2026-04-23T13:12:04","name":"Exposing case folding behavior","version":10,"mbox":"http://patchwork.ozlabs.org/series/501194/mbox/"}],"comments":"http://patchwork.ozlabs.org/api/patches/2227332/comments/","check":"pending","checks":"http://patchwork.ozlabs.org/api/patches/2227332/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=mXLpsysw;\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=1776949967;\n\tbh=7+KkoL3tT74ISbeLjawhJGX0pW4ZmQxGjH85QN72LoE=;\n\th=From:Date:Subject:References:In-Reply-To:To:Cc:From;\n\tb=mXLpsyswAnbg9YRnbdDz5iilJiJtO5A5NQKk4LLzYeYItugpZscHoMirsrTqdZklw\n\t uRtkt78P0tF2usiCD+AzS4DxtaFn09xWma60+OGMZDGC2z4KLuqlsVgVocBnT7pLN3\n\t fc64IaGd2c1zVnDMRXRPz8Yy3toUI4J6tXtIgz6oc9OeYAFmoWvWPJRtVRyijJdoZV\n\t q0sD8aHG6YvDLotHaXuFyr0SPfx/7edOwTyfUiI21xIqb/RDDQlbcOb7OFnCwpf2qi\n\t Er0QIXU00YmycTsOCInxKPdy5CSClVcIkivfVV+dtzWSu+NEuNvT8HtwfZ4/hcePzt\n\t fHCr2rk40/L+g==","From":"Chuck Lever ","Date":"Thu, 23 Apr 2026 09:12:13 -0400","Subject":"[PATCH v10 10/17] cifs: Implement fileattr_get for case\n sensitivity","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":"<20260423-case-sensitivity-v10-10-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 , Steve French ","X-Mailer":"b4 0.16-dev","X-Developer-Signature":"v=1; a=openpgp-sha256; l=2890;\n i=chuck.lever@oracle.com; h=from:subject:message-id;\n bh=x1bL8ZBB5Twab/6NumFLSBXEoTJcokaVZadIWFYQ2n4=;\n b=owEBbQKS/ZANAwAKATNqszNvZn+XAcsmYgBp6hq0DXYznTMLZfGDAShXh1kvv0fNjsbzn9DLA\n 4AHx4CpQRGJAjMEAAEKAB0WIQQosuWwEobfJDzyPv4zarMzb2Z/lwUCaeoatAAKCRAzarMzb2Z/\n l54FD/9J8IzDKD52G1HUWHY/FdLPMd/d+7cKv1E+H3pyAxYHbbvkBHQTOo20aZ4/jcIsKgebJk7\n 9O4KuEmRZdd1a7qxwEMwfae4Vdu5dwkZMKH340nVkskS4IV+ebV6VfpbRH5M8jmqXwmbE8x5x11\n CeQryqSIHtAB2vKyul0bDADKJVUABgdwcsVL3adw2OsR4isefIEmaok0e9pyKI0aQWmCK23daJp\n 1uGzMw11Z/kKLNhyexCnbFwzKnhvBEO4u+DruN3WfawsoZ3sR8D2/eekZIYTfaZMj8kr8BhTQ4z\n TgXOgXQOP8u4vmsPSG7qmVyABySAHuLYy/vMWGMnnBK/Bz6h8sZBZuIirGTrIVmC7Kw/9D0tiI/\n WZ3BmTYhsj2D9HGff+17Rpt4TCWRmiBI+IEccebG8+/fWJRTwjdAxr1dGbDmjZNEFoGakPKfrPy\n KVjK5LhJ/s7r6wnHVgcI7bnJ3vVjNA8YByiewwHEm33OVRyAFYCOym7imTZT4hAOx6S2IEmDl7P\n 920UVfYLeUU/KnNTPuXXv5W2237g8G90GpKuslHpUxCP+pMK1jD2qS3vGpGIky/BdpfnFZ697UP\n baZKfK7peDX96Z44E065p6B1U7ijJ7txWBmXNElNsgKhs+7vUaiN1cjvdKIj6SA1ySOYcURyUdQ\n IKLvYStt3oWHO8A==","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\nUpper layers such as NFSD need a way to query whether a filesystem\nhandles filenames in a case-sensitive manner. Report CIFS/SMB case\nhandling behavior via the FS_XFLAG_CASEFOLD flag.\n\nCIFS servers (typically Windows or Samba) are usually case-insensitive\nbut case-preserving, meaning they ignore case during lookups but store\nfilenames exactly as provided.\n\nThe implementation reports case sensitivity based on the nocase mount\noption, which reflects whether the client expects the server to perform\ncase-insensitive comparisons. When nocase is set, the mount is reported\nas case-insensitive.\n\nThe callback is registered in all three inode_operations structures\n(directory, file, and symlink) to ensure consistent reporting across\nall inode types.\n\nAcked-by: Steve French \nSigned-off-by: Chuck Lever \n---\n fs/smb/client/cifsfs.c | 20 ++++++++++++++++++++\n 1 file changed, 20 insertions(+)","diff":"diff --git a/fs/smb/client/cifsfs.c b/fs/smb/client/cifsfs.c\nindex 2025739f070a..9b70ffa3e01d 100644\n--- a/fs/smb/client/cifsfs.c\n+++ b/fs/smb/client/cifsfs.c\n@@ -30,6 +30,7 @@\n #include \n #include \n #include \n+#include \n #include \n #include \n #include \"cifsfs.h\"\n@@ -1199,6 +1200,22 @@ struct file_system_type smb3_fs_type = {\n MODULE_ALIAS_FS(\"smb3\");\n MODULE_ALIAS(\"smb3\");\n \n+static int cifs_fileattr_get(struct dentry *dentry, struct file_kattr *fa)\n+{\n+\tstruct cifs_sb_info *cifs_sb = CIFS_SB(dentry->d_sb);\n+\tstruct cifs_tcon *tcon = cifs_sb_master_tcon(cifs_sb);\n+\n+\t/*\n+\t * The nocase mount option installs case-insensitive dentry\n+\t * operations on this superblock. SMB preserves case on the\n+\t * wire and at rest, so the mount matches FS_XFLAG_CASEFOLD\n+\t * semantics: case-folded lookup, verbatim storage.\n+\t */\n+\tif (tcon->nocase)\n+\t\tfa->fsx_xflags |= FS_XFLAG_CASEFOLD;\n+\treturn 0;\n+}\n+\n const struct inode_operations cifs_dir_inode_ops = {\n \t.create = cifs_create,\n \t.atomic_open = cifs_atomic_open,\n@@ -1217,6 +1234,7 @@ const struct inode_operations cifs_dir_inode_ops = {\n \t.listxattr = cifs_listxattr,\n \t.get_acl = cifs_get_acl,\n \t.set_acl = cifs_set_acl,\n+\t.fileattr_get = cifs_fileattr_get,\n };\n \n const struct inode_operations cifs_file_inode_ops = {\n@@ -1227,6 +1245,7 @@ const struct inode_operations cifs_file_inode_ops = {\n \t.fiemap = cifs_fiemap,\n \t.get_acl = cifs_get_acl,\n \t.set_acl = cifs_set_acl,\n+\t.fileattr_get = cifs_fileattr_get,\n };\n \n const char *cifs_get_link(struct dentry *dentry, struct inode *inode,\n@@ -1261,6 +1280,7 @@ const struct inode_operations cifs_symlink_inode_ops = {\n \t.setattr = cifs_setattr,\n \t.permission = cifs_permission,\n \t.listxattr = cifs_listxattr,\n+\t.fileattr_get = cifs_fileattr_get,\n };\n \n /*\n","prefixes":["v10","10/17"]}