{"id":2227312,"url":"http://patchwork.ozlabs.org/api/patches/2227312/?format=json","web_url":"http://patchwork.ozlabs.org/project/linux-cifs-client/patch/20260423-case-sensitivity-v10-3-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-v10-3-c385d674a6cf@oracle.com>","list_archive_url":null,"date":"2026-04-23T13:12:06","name":"[v10,03/17] fat: Implement fileattr_get for case sensitivity","commit_ref":null,"pull_url":null,"state":"new","archived":false,"hash":"8d6423e2146bad40ae766202ca6c0f1bf44d2abd","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-v10-3-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/2227312/comments/","check":"pending","checks":"http://patchwork.ozlabs.org/api/patches/2227312/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=W9vQKqa0;\n\tdkim-atps=neutral","legolas.ozlabs.org;\n spf=pass (sender SPF authorized) smtp.mailfrom=vger.kernel.org\n (client-ip=2600:3c15:e001:75::12fc:5321; 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charset=\"utf-8\"","Content-Transfer-Encoding":"7bit","Message-Id":"<20260423-case-sensitivity-v10-3-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 ","X-Mailer":"b4 0.16-dev","X-Developer-Signature":"v=1; a=openpgp-sha256; l=3856;\n i=chuck.lever@oracle.com; h=from:subject:message-id;\n bh=z0G26qNOK5JhmRz9M45By4F6NKvq8eKa6ZlbA0umD2I=;\n b=owEBbQKS/ZANAwAKATNqszNvZn+XAcsmYgBp6hqzhQ4CSX2BgNJWYYLNu38a9BCDxEokRi4Xl\n ykrZ4frVAiJAjMEAAEKAB0WIQQosuWwEobfJDzyPv4zarMzb2Z/lwUCaeoaswAKCRAzarMzb2Z/\n lxTyD/9AFx9PEDAFHBJoF2p/hUJFYsfpPsY+fQSOYOQsvZHQWT02iVJ/Ps31IZocal19lZ6Ncwz\n GAlHBA5zy3e0k4UsVKDxnGrNIydJ6xjEgzW0zbPzIQszSAnMep56jmLfIcMPP8m1taBj+Zfelj9\n nTr4v3bt44/UTLyudqklgnRfoKAIyNuPjlowtNv2DNW6F6sZD8TXOgOsw8tm1szWdS+SnUEe+jF\n Pg4QjpzGrGuIieYWxkfyPTGzrDAS1HFJHSpsG5ppT53lgLknvuEgoKlfraZ7nXGfXAQVuQ8Xnz2\n Vv+vGhxI1PQQ6DWkSdQQLV14PfoVA3weiAPVK0e1djI7VEVChPy5KMWhhcDLtG1ViT1aLD+4Zz6\n 5jJGUGP76QqiKRQwNwIgRFGKIKHaMU8KcciPMrkiJQMMJ42OKI9xglRGXbU5Ruo++I6wjr5qer7\n FUz1vurjswos2vPktcWMyh+txl/XDVTK8lWFReLdeWgZB21wiQoXHkcggzgcPdkIpMPvM04xDyn\n iWwn8WHwS3/sgl7pPyE8kIHawXuoczf7i/iYXwNHpHX5QdhJKyPE1GAIEwkAJsA6edpb0TGrOKA\n 1KMQnEV2XWxw4B3bQnZlO3bfIAf7tW7SPYHYj5xRfh5031POsCr2TiqgPIjkk3uczVwRgkj5jIo\n k7wp6gkaNgTtdgg==","X-Developer-Key":"i=chuck.lever@oracle.com; a=openpgp;\n fpr=28B2E5B01286DF243CF23EFE336AB3336F667F97"},"content":"From: Chuck Lever \n\nReport FAT's case sensitivity behavior via the FS_XFLAG_CASEFOLD\nand FS_XFLAG_CASENONPRESERVING flags. FAT filesystems are\ncase-insensitive by default.\n\nMSDOS supports a 'nocase' mount option that enables case-sensitive\nbehavior; check this option when reporting case sensitivity.\n\nVFAT long filename entries preserve case; without VFAT, only\nuppercased 8.3 short names are stored. MSDOS with 'nocase' also\npreserves case since the name-formatting code skips upcasing when\n'nocase' is set. Check both options when reporting case preservation.\n\nReviewed-by: Jan Kara \nSigned-off-by: Chuck Lever \n---\n fs/fat/fat.h | 3 +++\n fs/fat/file.c | 23 +++++++++++++++++++++++\n fs/fat/namei_msdos.c | 1 +\n fs/fat/namei_vfat.c | 1 +\n 4 files changed, 28 insertions(+)","diff":"diff --git a/fs/fat/fat.h b/fs/fat/fat.h\nindex 5a58f0bf8ce8..99ed9228a677 100644\n--- a/fs/fat/fat.h\n+++ b/fs/fat/fat.h\n@@ -10,6 +10,8 @@\n #include \n #include \n \n+struct file_kattr;\n+\n /*\n * vfat shortname flags\n */\n@@ -408,6 +410,7 @@ extern void fat_truncate_blocks(struct inode *inode, loff_t offset);\n extern int fat_getattr(struct mnt_idmap *idmap,\n \t\t const struct path *path, struct kstat *stat,\n \t\t u32 request_mask, unsigned int flags);\n+int fat_fileattr_get(struct dentry *dentry, struct file_kattr *fa);\n extern int fat_file_fsync(struct file *file, loff_t start, loff_t end,\n \t\t\t int datasync);\n \ndiff --git a/fs/fat/file.c b/fs/fat/file.c\nindex becccdd2e501..34d8588fcd3f 100644\n--- a/fs/fat/file.c\n+++ b/fs/fat/file.c\n@@ -17,6 +17,7 @@\n #include \n #include \n #include \n+#include \n #include \"fat.h\"\n \n static long fat_fallocate(struct file *file, int mode,\n@@ -398,6 +399,27 @@ void fat_truncate_blocks(struct inode *inode, loff_t offset)\n \tfat_flush_inodes(inode->i_sb, inode, NULL);\n }\n \n+int fat_fileattr_get(struct dentry *dentry, struct file_kattr *fa)\n+{\n+\tstruct msdos_sb_info *sbi = MSDOS_SB(dentry->d_sb);\n+\n+\t/*\n+\t * FAT filesystems are case-insensitive by default. MSDOS\n+\t * supports a 'nocase' mount option for case-sensitive behavior.\n+\t *\n+\t * VFAT long filename entries preserve case. Without VFAT, only\n+\t * uppercased 8.3 short names are stored. MSDOS with 'nocase'\n+\t * also preserves case.\n+\t */\n+\tif (!sbi->options.nocase) {\n+\t\tfa->fsx_xflags |= FS_XFLAG_CASEFOLD;\n+\t\tif (!sbi->options.isvfat)\n+\t\t\tfa->fsx_xflags |= FS_XFLAG_CASENONPRESERVING;\n+\t}\n+\treturn 0;\n+}\n+EXPORT_SYMBOL_GPL(fat_fileattr_get);\n+\n int fat_getattr(struct mnt_idmap *idmap, const struct path *path,\n \t\tstruct kstat *stat, u32 request_mask, unsigned int flags)\n {\n@@ -575,5 +597,6 @@ EXPORT_SYMBOL_GPL(fat_setattr);\n const struct inode_operations fat_file_inode_operations = {\n \t.setattr\t= fat_setattr,\n \t.getattr\t= fat_getattr,\n+\t.fileattr_get\t= fat_fileattr_get,\n \t.update_time\t= fat_update_time,\n };\ndiff --git a/fs/fat/namei_msdos.c b/fs/fat/namei_msdos.c\nindex 4cc65f330fb7..0fd2971ad4b1 100644\n--- a/fs/fat/namei_msdos.c\n+++ b/fs/fat/namei_msdos.c\n@@ -644,6 +644,7 @@ static const struct inode_operations msdos_dir_inode_operations = {\n \t.rename\t\t= msdos_rename,\n \t.setattr\t= fat_setattr,\n \t.getattr\t= fat_getattr,\n+\t.fileattr_get\t= fat_fileattr_get,\n \t.update_time\t= fat_update_time,\n };\n \ndiff --git a/fs/fat/namei_vfat.c b/fs/fat/namei_vfat.c\nindex 918b3756674c..e909447873e3 100644\n--- a/fs/fat/namei_vfat.c\n+++ b/fs/fat/namei_vfat.c\n@@ -1185,6 +1185,7 @@ static const struct inode_operations vfat_dir_inode_operations = {\n \t.rename\t\t= vfat_rename2,\n \t.setattr\t= fat_setattr,\n \t.getattr\t= fat_getattr,\n+\t.fileattr_get\t= fat_fileattr_get,\n \t.update_time\t= fat_update_time,\n };\n \n","prefixes":["v10","03/17"]}