/*-
* SPDX-License-Identifier: BSD-2-Clause-FreeBSD
*
* Copyright (c) 2011 Nathan Whitehorn
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* $FreeBSD$
*/
#include <sys/types.h>
#include <sys/sysctl.h>
#include <string.h>
#include "partedit.h"
/* EFI partition size in bytes */
#define EFI_BOOTPART_SIZE (260 * 1024 * 1024)
static const char *
x86_bootmethod(void)
{
static char fw[255] = "";
size_t len = sizeof(fw);
int error;
if (strlen(fw) == 0) {
error = sysctlbyname("machdep.bootmethod", fw, &len, NULL, -1);
if (error != 0)
return ("BIOS");
}
return (fw);
}
const char *
default_scheme(void)
{
if (strcmp(x86_bootmethod(), "UEFI") == 0)
return ("GPT");
else
return ("MBR");
}
int
is_scheme_bootable(const char *part_type)
{
if (strcmp(part_type, "GPT") == 0)
return (1);
if (strcmp(x86_bootmethod(), "BIOS") == 0) {
if (strcmp(part_type, "BSD") == 0)
return (1);
if (strcmp(part_type, "MBR") == 0)
return (1);
}
return (0);
}
int
is_fs_bootable(const char *part_type, const char *fs)
{
if (strcmp(fs, "freebsd-ufs") == 0)
return (1);
if (strcmp(fs, "freebsd-zfs") == 0 &&
strcmp(part_type, "GPT") == 0 &&
strcmp(x86_bootmethod(), "BIOS") == 0)
return (1);
return (0);
}
size_t
bootpart_size(const char *scheme)
{
/* No partcode except for GPT */
if (strcmp(scheme, "GPT") != 0)
return (0);
if (strcmp(x86_bootmethod(), "BIOS") == 0)
return (512*1024);
else
return (EFI_BOOTPART_SIZE);
return (0);
}
const char *
bootpart_type(const char *scheme, const char **mountpoint)
{
if (strcmp(x86_bootmethod(), "UEFI") == 0)
return ("efi");
return ("freebsd-boot");
}
const char *
bootcode_path(const char *part_type)
{
if (strcmp(x86_bootmethod(), "UEFI") == 0)
return (NULL);
if (strcmp(part_type, "GPT") == 0)
return ("/boot/pmbr");
if (strcmp(part_type, "MBR") == 0)
return ("/boot/mbr");
if (strcmp(part_type, "BSD") == 0)
return ("/boot/boot");
return (NULL);
}
const char *
partcode_path(const char *part_type, const char *fs_type)
{
if (strcmp(part_type, "GPT") == 0 && strcmp(x86_bootmethod(), "UEFI") != 0) {
if (strcmp(fs_type, "zfs") == 0)
return ("/boot/gptzfsboot");
else
return ("/boot/gptboot");
}
/* No partcode except for non-UEFI GPT */
return (NULL);
}