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(* helper-v2v-input
* Copyright (C) 2009-2021 Red Hat Inc.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*)
open Printf
open Unix
open Std_utils
open Tools_utils
open Common_gettext.Gettext
open Parse_libvirt_xml
open Types
open Utils
open Input
let rec get_source_from_libvirt options args =
if options.input_options <> [] then
error (f_"no -io (input options) are allowed here");
let guest =
match args with
| [arg] -> arg
| _ ->
error (f_"-i libvirt: expecting a libvirt guest name \
on the command line") in
(* Connect to the hypervisor. *)
let conn =
let auth = Libvirt_utils.auth_for_password_file
?password_file:options.input_password () in
Libvirt.Connect.connect_auth ?name:options.input_conn auth in
(* Parse the libvirt XML. *)
let source, disks, _ = parse_libvirt_domain conn guest in
source, disks
and get_source_from_libvirt_xml _ args =
let xmlfile =
match args with
| [arg] -> arg
| _ ->
error (f_"-i libvirtxml: expecting a libvirt XML filename \
on the command line") in
let xml = read_whole_file xmlfile in
let source, disks = parse_libvirt_xml xml in
source, disks
and setup_servers options dir disks =
(* Check nbdkit is installed. *)
if not (Nbdkit.is_installed ()) then
error (f_"nbdkit is not installed or not working. It is required to \
use ‘-i libvirt|libvirtxml’.");
if not (Nbdkit.probe_plugin "file") then
error (f_"nbdkit-file-plugin is not installed or not working");
if not (Nbdkit.probe_plugin "nbd") then
error (f_"nbdkit-nbd-plugin is not installed or not working");
if options.read_only && not (Nbdkit.probe_filter "cow") then
error (f_"nbdkit-cow-filter is not installed or not working");
List.iteri (
fun i { d_format = format; d_type } ->
let socket = sprintf "%s/in%d" dir i in
On_exit.unlink socket;
match d_type with
(* Forward to another NBD server using nbdkit-nbd-plugin. *)
| NBD (hostname, port) ->
let cmd = Nbdkit.create "nbd" in
if options.read_only then
Nbdkit.add_filter cmd "cow";
Nbdkit.add_arg cmd "hostname" hostname;
Nbdkit.add_arg cmd "port" (string_of_int port);
Nbdkit.add_arg cmd "shared" "true";
let _, pid = Nbdkit.run_unix socket cmd in
(* --exit-with-parent should ensure nbdkit is cleaned
* up when we exit, but it's not supported everywhere.
*)
On_exit.kill pid
(* Forward to an HTTP/HTTPS server using nbdkit-curl-plugin. *)
| HTTP url ->
if not options.read_only then
error (f_"in-place mode does not work with HTTP source");
let cor = dir // "convert" in
let cmd = Nbdkit_curl.create_curl ~cor url in
let _, pid = Nbdkit.run_unix socket cmd in
(* --exit-with-parent should ensure nbdkit is cleaned
* up when we exit, but it's not supported everywhere.
*)
On_exit.kill pid
| BlockDev filename | LocalFile filename ->
match format with
| Some "raw" ->
let cmd = Nbdkit.create "file" in
if options.read_only then
Nbdkit.add_filter cmd "cow";
Nbdkit.add_arg cmd "file" filename;
if Nbdkit.version () >= (1, 22, 0) then
Nbdkit.add_arg cmd "cache" "none";
let _, pid = Nbdkit.run_unix socket cmd in
(* --exit-with-parent should ensure nbdkit is cleaned
* up when we exit, but it's not supported everywhere.
*)
On_exit.kill pid
(* We use qemu-nbd for all other formats including auto-detect. *)
| _ ->
let cmd = QemuNBD.create filename in
QemuNBD.set_snapshot cmd options.read_only;
QemuNBD.set_format cmd format;
let _, pid = QemuNBD.run_unix socket cmd in
On_exit.kill pid
) disks
module Libvirt_ = struct
let to_string options args =
let xs = "-i libvirt" :: args in
let xs =
match options.input_conn with
| Some ic -> ("-ic " ^ ic) :: xs
| None -> xs in
String.concat " " xs
let query_input_options () =
printf (f_"No input options can be used in this mode.\n")
let setup dir options args =
let source, data = get_source_from_libvirt options args in
setup_servers options dir data;
source
end
module LibvirtXML = struct
let to_string options args = String.concat " " ("-i libvirtxml" :: args)
let query_input_options () =
printf (f_"No input options can be used in this mode.\n")
let setup dir options args =
let source, data = get_source_from_libvirt_xml options args in
setup_servers options dir data;
source
end
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