1 files changed, 9 insertions, 1 deletions

diff --git a/include/uapi/linux/btrfs.h b/include/uapi/linux/btrfs.h
index 11f13108b78b..17a94704b183 100644
--- a/include/uapi/linux/btrfs.h
+++ b/include/uapi/linux/btrfs.h
@@ -229,7 +229,15 @@ struct btrfs_balance_args {
                         __u32 limit_max;
                 };
         };
-        __u64 unused[7];
+
+        /*
+         * Process chunks that cross stripes_min..stripes_max devices,
+         * BTRFS_BALANCE_ARGS_STRIPES_RANGE
+         */
+        __le32 stripes_min;
+        __le32 stripes_max;
+
+        __u64 unused[6];
 } __attribute__ ((__packed__));
 
 /* report balance progress to userspace */