[PATCH v3 08/16] xfs: Report case sensitivity in fileattr_get

[Chuck Lever <cel@kernel.org>]

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

Upper layers such as NFSD need to query whether a filesystem is
case-sensitive. Populate the case_insensitive and case_preserving
fields in xfs_fileattr_get(). XFS always preserves case. XFS is
case-sensitive by default, but supports ASCII case-insensitive
lookups when formatted with the ASCIICI feature flag.

Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
---
 fs/xfs/xfs_ioctl.c | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/fs/xfs/xfs_ioctl.c b/fs/xfs/xfs_ioctl.c
index 59eaad774371..97314fcb7732 100644
--- a/fs/xfs/xfs_ioctl.c
+++ b/fs/xfs/xfs_ioctl.c
@@ -516,6 +516,13 @@ xfs_fileattr_get(
 	xfs_fill_fsxattr(ip, XFS_DATA_FORK, fa);
 	xfs_iunlock(ip, XFS_ILOCK_SHARED);
 
+	/*
+	 * XFS is case-sensitive by default, but can be formatted with
+	 * ASCII case-insensitive mode enabled.
+	 */
+	fa->case_insensitive = xfs_has_asciici(ip->i_mount);
+	fa->case_preserving = true;
+
 	return 0;
 }
 
-- 
2.52.0