DT_IND_RANGE = 1 << 4,
};
+/* for dt_read_lock() and dt_write_lock() object lock rule */
+enum dt_object_role {
+ DT_SRC_PARENT,
+ DT_SRC_CHILD,
+ DT_TGT_PARENT,
+ DT_TGT_CHILD,
+ DT_TGT_ORPHAN,
+ DT_LASTID,
+};
+
/**
* Features, required from index to support file system directories (mapping
* names to fids).