From: Chuck Lever <chuck.lever@oracle.com>
Date: Thu, 7 May 2026 08:52:59 +0000 (-0400)
Subject: hfs: Implement fileattr_get for case sensitivity
X-Git-Url: http://git.ipfire.org/gitweb.cgi?a=commitdiff_plain;h=b6fe046c30236e37e3f8c500cf5b1297c317c5ee;p=thirdparty%2Fkernel%2Flinux.git

hfs: Implement fileattr_get for case sensitivity

Report HFS case sensitivity behavior via the FS_XFLAG_CASEFOLD
flag. HFS is always case-insensitive (using Mac OS Roman case
folding) and always preserves case at rest.

Reviewed-by: Viacheslav Dubeyko <slava@dubeyko.com>
Reviewed-by: Roland Mainz <roland.mainz@nrubsig.org>
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Link: https://patch.msgid.link/20260507-case-sensitivity-v14-6-e62cc8200435@oracle.com
Signed-off-by: Christian Brauner <brauner@kernel.org>
---

diff --git a/fs/hfs/dir.c b/fs/hfs/dir.c
index f5e7efe924e78..c4c6e1623f55d 100644
--- a/fs/hfs/dir.c
+++ b/fs/hfs/dir.c
@@ -328,4 +328,5 @@ const struct inode_operations hfs_dir_inode_operations = {
 	.rmdir		= hfs_remove,
 	.rename		= hfs_rename,
 	.setattr	= hfs_inode_setattr,
+	.fileattr_get	= hfs_fileattr_get,
 };
diff --git a/fs/hfs/hfs_fs.h b/fs/hfs/hfs_fs.h
index ac0e83f77a0f1..1b23448c9a48b 100644
--- a/fs/hfs/hfs_fs.h
+++ b/fs/hfs/hfs_fs.h
@@ -177,6 +177,8 @@ extern int hfs_get_block(struct inode *inode, sector_t block,
 extern const struct address_space_operations hfs_aops;
 extern const struct address_space_operations hfs_btree_aops;
 
+struct file_kattr;
+int hfs_fileattr_get(struct dentry *dentry, struct file_kattr *fa);
 int hfs_write_begin(const struct kiocb *iocb, struct address_space *mapping,
 		    loff_t pos, unsigned int len, struct folio **foliop,
 		    void **fsdata);
diff --git a/fs/hfs/inode.c b/fs/hfs/inode.c
index 89b33a9d46d5c..f41cc261684d9 100644
--- a/fs/hfs/inode.c
+++ b/fs/hfs/inode.c
@@ -18,6 +18,7 @@
 #include <linux/uio.h>
 #include <linux/xattr.h>
 #include <linux/blkdev.h>
+#include <linux/fileattr.h>
 
 #include "hfs_fs.h"
 #include "btree.h"
@@ -699,6 +700,18 @@ static int hfs_file_fsync(struct file *filp, loff_t start, loff_t end,
 	return ret;
 }
 
+int hfs_fileattr_get(struct dentry *dentry, struct file_kattr *fa)
+{
+	/*
+	 * HFS compares filenames using Mac OS Roman case folding, so
+	 * lookup is always case-insensitive. Names are stored on disk
+	 * with case intact; CASENONPRESERVING stays clear.
+	 */
+	fa->fsx_xflags |= FS_XFLAG_CASEFOLD;
+	fa->flags |= FS_CASEFOLD_FL;
+	return 0;
+}
+
 static const struct file_operations hfs_file_operations = {
 	.llseek		= generic_file_llseek,
 	.read_iter	= generic_file_read_iter,
@@ -715,4 +728,5 @@ static const struct inode_operations hfs_file_inode_operations = {
 	.lookup		= hfs_file_lookup,
 	.setattr	= hfs_inode_setattr,
 	.listxattr	= generic_listxattr,
+	.fileattr_get	= hfs_fileattr_get,
 };