1 files changed, 3 insertions, 0 deletions

diff --git a/include/linux/raid/md_k.h b/include/linux/raid/md_k.h
index dcb729244f47..b579cc628303 100644
--- a/include/linux/raid/md_k.h
+++ b/include/linux/raid/md_k.h
@@ -130,6 +130,9 @@ struct mddev_s
                                         minor_version,
                                         patch_version;
         int                             persistent;
+        int                             external;       /* metadata is
+                                                         * managed externally */
+        char                            metadata_type[17]; /* externally set*/
         int                             chunk_size;
         time_t                          ctime, utime;
         int                             level, layout;