extern int dbif_env_open(DBD *dbd, struct db_param *dbp, uint32_t dbenv_oflags);
extern int dbif_open(DBD *dbd, struct db_param *dbp, int reindex);
extern int dbif_close(DBD *dbd);
-extern int dbif_prep_upgrade(const char *path);
+extern int dbif_env_remove(const char *path);
+extern int dbif_getversion(DBD *dbd);
+extern int dbif_setversion(DBD *dbd, int);
extern int dbif_get(DBD *, const int, DBT *, DBT *, u_int32_t);
extern int dbif_pget(DBD *, const int, DBT *, DBT *, DBT *, u_int32_t);