linux-ext4 - [PATCH v3 06/16] hfsplus: Report case sensitivity in fileattr

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Message-ID: <20260112174629.3729358-7-cel@kernel.org>
Date: Mon, 12 Jan 2026 12:46:19 -0500
From: Chuck Lever <cel@...nel.org>
To: vira@....codeaurora.org, Christian Brauner <brauner@...nel.org>,
	Jan Kara <jack@...e.cz>
Cc: <linux-fsdevel@...r.kernel.org>,
	linux-ext4@...r.kernel.org,
	linux-xfs@...r.kernel.org,
	linux-cifs@...r.kernel.org,
	<linux-nfs@...r.kernel.org>,
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	Chuck Lever <chuck.lever@...cle.com>
Subject: [PATCH v3 06/16] hfsplus: Report case sensitivity in fileattr_get

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

Add case sensitivity reporting to the existing hfsplus_fileattr_get()
function. 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.

Signed-off-by: Chuck Lever <chuck.lever@...cle.com>
---
 fs/hfsplus/inode.c | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/fs/hfsplus/inode.c b/fs/hfsplus/inode.c
index 7ae6745ca7ae..0ce9561c0f18 100644
--- a/fs/hfsplus/inode.c
+++ b/fs/hfsplus/inode.c
@@ -694,6 +694,7 @@ 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)
@@ -705,6 +706,14 @@ int hfsplus_fileattr_get(struct dentry *dentry, struct file_kattr *fa)
 
 	fileattr_fill_flags(fa, flags);
 
+	/*
+	 * HFS+ always preserves case. Case sensitivity depends on how
+	 * the filesystem was formatted: HFSX volumes may be either
+	 * case-sensitive or case-insensitive.
+	 */
+	fa->case_insensitive = test_bit(HFSPLUS_SB_CASEFOLD, &sbi->flags);
+	fa->case_preserving = true;
+
 	return 0;
 }
 
-- 
2.52.0