external set_busy : t -> unit = "ocaml_guestfs_set_busy"
external set_ready : t -> unit = "ocaml_guestfs_set_ready"
external end_busy : t -> unit = "ocaml_guestfs_end_busy"
+external set_memsize : t -> int -> unit = "ocaml_guestfs_set_memsize"
+external get_memsize : t -> int = "ocaml_guestfs_get_memsize"
external mount : t -> string -> string -> unit = "ocaml_guestfs_mount"
external sync : t -> unit = "ocaml_guestfs_sync"
external touch : t -> string -> unit = "ocaml_guestfs_touch"