+extern int map_update(struct map_ent **mpp, int devnum, int major, int minor,
+ int uuid[4], char *path);
+extern struct map_ent *map_by_uuid(struct map_ent **map, int uuid[4]);
+extern void map_read(struct map_ent **melp);
+extern int map_write(struct map_ent *mel);
+extern void map_delete(struct map_ent **mapp, int devnum);
+extern void map_free(struct map_ent *map);
+extern void map_add(struct map_ent **melp,
+ int devnum, int major, int minor, int uuid[4], char *path);
+