Note that [.] and [..] entries are not included in the result,
and the list is sorted on the [filename] field. *)
+val disk_usage : string -> string -> int64 callback -> unit
+ (** [disk_usage dev dir cb] sends the [Disk_usage] message to the
+ slave thread.
+
+ This causes the slave thread to estimate the disk usage of the
+ directory (or file) [dir] from volume [dev], and call [cb] with
+ the result (size in {b kilobytes}). *)
+
+type export_t =
+ | Export_tar (** uncompressed tar archive *)
+ | Export_tgz (** gzip compressed tar archive *)
+ | Export_checksums of string (** checksums using algorithm *)
+ | Export_list (** list of file names, \0-separated *)
+ (** Export format used by {!export_dir_to}. *)
+
+val export_dir_to : export_t -> string -> string -> string -> unit callback -> unit
+ (** [export_dir_to t dev dir file cb] sends the [Export_dir_to] message
+ to the slave thread.
+
+ This causes the slave thread to export the directory [dir] on
+ device [dev] to the host file called [file]. The precise
+ operation (ie. what is exported) is controlled by the type
+ [export_t]. When the export has been completed, the callback
+ [cb] is called in the main thread.
+
+ Libguestfs doesn't offer any way to view progress of this
+ operation, which could potentially take a long time. *)
+
val discard_command_queue : unit -> unit
(** [discard_command_queue ()] discards any commands on the command
queue. The currently running command is not (and can not be)