[PATCH v8 07/17] hfsplus: Report case sensitivity in fileattr_get

[Chuck Lever <cel@kernel.org>]

From: Chuck Lever <chuck.lever@oracle.com>

Add case sensitivity reporting to the existing hfsplus_fileattr_get()
function via the FS_XFLAG_CASEFOLD flag. HFS+ always preserves case
at rest.

Case sensitivity depends on how the volume was formatted: HFSX
volumes may be either case-sensitive or case-insensitive, indicated
by the HFSPLUS_SB_CASEFOLD superblock flag.

Reviewed-by: Viacheslav Dubeyko <slava@dubeyko.com>
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
---
 fs/hfsplus/inode.c | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/fs/hfsplus/inode.c b/fs/hfsplus/inode.c
index 922ff41df042..fd50f0d52c81 100644
--- a/fs/hfsplus/inode.c
+++ b/fs/hfsplus/inode.c
@@ -728,6 +728,7 @@ int hfsplus_fileattr_get(struct dentry *dentry, struct file_kattr *fa)
 {
 	struct inode *inode = d_inode(dentry);
 	struct hfsplus_inode_info *hip = HFSPLUS_I(inode);
+	struct hfsplus_sb_info *sbi = HFSPLUS_SB(inode->i_sb);
 	unsigned int flags = 0;
 
 	if (inode->i_flags & S_IMMUTABLE)
@@ -739,6 +740,13 @@ int hfsplus_fileattr_get(struct dentry *dentry, struct file_kattr *fa)
 
 	fileattr_fill_flags(fa, flags);
 
+	/*
+	 * HFS+ preserves case (the default). Case sensitivity depends
+	 * on how the filesystem was formatted: HFSX volumes may be
+	 * either case-sensitive or case-insensitive.
+	 */
+	if (test_bit(HFSPLUS_SB_CASEFOLD, &sbi->flags))
+		fa->fsx_xflags |= FS_XFLAG_CASEFOLD;
 	return 0;
 }
 
-- 
2.53.0