[PATCH v5 07/16] ext4: Report case sensitivity in fileattr_get

[Chuck Lever <cel@kernel.org>]

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

Report ext4's case sensitivity behavior via file_kattr boolean
fields. ext4 always preserves case at rest.

Case sensitivity is a per-directory setting in ext4. If the queried
inode is a casefolded directory, report case-insensitive; otherwise
report case-sensitive (standard POSIX behavior).

Reviewed-by: Jan Kara <jack@suse.cz>
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
---
 fs/ext4/ioctl.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/fs/ext4/ioctl.c b/fs/ext4/ioctl.c
index 7ce0fc40aec2..213769d217c3 100644
--- a/fs/ext4/ioctl.c
+++ b/fs/ext4/ioctl.c
@@ -996,6 +996,12 @@ int ext4_fileattr_get(struct dentry *dentry, struct file_kattr *fa)
 	if (ext4_has_feature_project(inode->i_sb))
 		fa->fsx_projid = from_kprojid(&init_user_ns, ei->i_projid);
 
+	/*
+	 * ext4 preserves case (the default). If this inode is a
+	 * casefolded directory, report case-insensitive; otherwise
+	 * report case-sensitive (standard POSIX behavior).
+	 */
+	fa->case_insensitive = IS_CASEFOLDED(inode);
 	return 0;
 }
 
-- 
2.52.0