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(* virt-v2v
* Copyright (C) 2009-2023 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 Tools_utils
module G = Guestfs
type i_firmware =
| I_BIOS
| I_UEFI of string list
let detect_firmware g =
let parttype_is_gpt dev =
try g#part_get_parttype dev = "gpt"
with G.Error msg as exn ->
(* If it's _not_ "unrecognised disk label" then re-raise it. *)
if g#last_errno () <> G.Errno.errno_EINVAL then raise exn;
debug "%s (ignored)" msg;
false
in
let accumulate_partition (esp_parts, bboot) part =
let dev = g#part_to_dev part in
if parttype_is_gpt dev then
let partnum = g#part_to_partnum part in
let part_type_guid = g#part_get_gpt_type dev partnum in
match part_type_guid with
(* EFI system partition *)
| "C12A7328-F81F-11D2-BA4B-00A0C93EC93B" -> part :: esp_parts, bboot
(* BIOS boot partition *)
| "21686148-6449-6E6F-744E-656564454649" -> esp_parts, true
| _ -> esp_parts, bboot
else esp_parts, bboot
in
let esp_partitions, bios_boot =
Array.fold_left accumulate_partition ([], false) (g#list_partitions ()) in
(* If there's a BIOS boot partition present (0xef02 type for gdisk,
* "bios_grub" flag for parted), then this is likely a BIOS+GPT setup.
* In this case we prioritize BIOS boot partition and detect BIOS firmware,
* no matter how many ESPs we've found.
*)
match esp_partitions, bios_boot with
| _ :: _, false -> I_UEFI esp_partitions
| _ -> I_BIOS
|
