Qcow_stream (u.2a08f4110a3690c39cd13a143e83b527.qcow-stream.0.13.0.doc.qcow-stream.Qcow

Sourcemodule Header = Qcow_header

Sourcemodule Cache = Qcow_cache

Sourceexception Reference_outside_file of int64 * int64

val start_stream_decode : 
  Lwt_unix.file_descr ->
  (int64 * int32 * int64 ref * Qcow_mapping.t) Lwt.t

Decodes QCOW header and tables from the beginning of the stream, constructing a map of data clusters. Returns (virtual_size, cluster_bits, last_read_cluster, data_cluster_map)

Source

val copy_data : 
  progress_cb:(int -> unit) ->
  int64 ref ->
  int32 ->
  Lwt_unix.file_descr ->
  Lwt_unix.file_descr ->
  Qcow_mapping.t ->
  unit Lwt.t

copy_data last_read_cluster cluster_bits input_fd output_fd data_cluster_map Copies data cluster-by-cluster concurrently

Source

val stream_decode : 
  ?progress_cb:(int -> unit) ->
  ?header_info:(int64 * int32 * int64 ref * Qcow_mapping.t) ->
  Unix.file_descr ->
  string ->
  unit

stream_decode ?progress_cb ?header_info fd output_path decodes the input QCOW stream from fd, writing out the raw file to output_path.

Accepts header_info returned by start_stream_decode if the header has already been parsed separately (to determine the virtual size, for example).

If provided, progress_cb is a callback that will be called with integer percentage values representing copying progress.