0b7472b3d8
Per hier(7), the ESP will be mounted at /boot/efi. On UFS systems, any existing ESP will be reused and mounted there; otherwise, a new one will be made. On ZFS systems, space for an ESP is allocated on all disks in the root pool, but only the partition actually used to boot is set up and mounted. This makes future upgrades of the EFI loader easier (upgrade scripts can just change /boot/efi) and also greatly simplifies the parts of the installer involved in initialization of the ESP. It also makes the installer's behavior correspond to the documentation in hier(7). Reviewed by: imp, tsoome MFC after: 1 week Relnotes: yes Differential Revision: https://reviews.freebsd.org/D28897
156 lines
3.5 KiB
C
156 lines
3.5 KiB
C
/*-
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* SPDX-License-Identifier: BSD-2-Clause-FreeBSD
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*
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* Copyright (c) 2011 Nathan Whitehorn
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* $FreeBSD$
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*/
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#include <sys/types.h>
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#include <sys/sysctl.h>
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#include <string.h>
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#include "partedit.h"
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/* EFI partition size in bytes */
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#define EFI_BOOTPART_SIZE (260 * 1024 * 1024)
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static const char *
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x86_bootmethod(void)
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{
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static char fw[255] = "";
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size_t len = sizeof(fw);
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int error;
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if (strlen(fw) == 0) {
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error = sysctlbyname("machdep.bootmethod", fw, &len, NULL, -1);
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if (error != 0)
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return ("BIOS");
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}
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return (fw);
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}
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const char *
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default_scheme(void)
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{
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if (strcmp(x86_bootmethod(), "UEFI") == 0)
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return ("GPT");
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else
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return ("MBR");
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}
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int
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is_scheme_bootable(const char *part_type)
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{
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if (strcmp(part_type, "GPT") == 0)
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return (1);
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if (strcmp(x86_bootmethod(), "BIOS") == 0) {
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if (strcmp(part_type, "BSD") == 0)
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return (1);
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if (strcmp(part_type, "MBR") == 0)
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return (1);
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}
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return (0);
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}
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int
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is_fs_bootable(const char *part_type, const char *fs)
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{
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if (strcmp(fs, "freebsd-ufs") == 0)
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return (1);
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if (strcmp(fs, "freebsd-zfs") == 0 &&
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strcmp(part_type, "GPT") == 0 &&
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strcmp(x86_bootmethod(), "BIOS") == 0)
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return (1);
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return (0);
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}
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size_t
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bootpart_size(const char *scheme)
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{
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/* No partcode except for GPT */
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if (strcmp(scheme, "GPT") != 0)
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return (0);
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if (strcmp(x86_bootmethod(), "BIOS") == 0)
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return (512*1024);
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else
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return (EFI_BOOTPART_SIZE);
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return (0);
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}
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const char *
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bootpart_type(const char *scheme, const char **mountpoint)
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{
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if (strcmp(x86_bootmethod(), "UEFI") == 0) {
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*mountpoint = "/boot/efi";
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return ("efi");
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}
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return ("freebsd-boot");
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}
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const char *
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bootcode_path(const char *part_type)
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{
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if (strcmp(x86_bootmethod(), "UEFI") == 0)
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return (NULL);
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if (strcmp(part_type, "GPT") == 0)
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return ("/boot/pmbr");
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if (strcmp(part_type, "MBR") == 0)
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return ("/boot/mbr");
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if (strcmp(part_type, "BSD") == 0)
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return ("/boot/boot");
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return (NULL);
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}
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const char *
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partcode_path(const char *part_type, const char *fs_type)
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{
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if (strcmp(part_type, "GPT") == 0 && strcmp(x86_bootmethod(), "UEFI") != 0) {
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if (strcmp(fs_type, "zfs") == 0)
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return ("/boot/gptzfsboot");
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else
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return ("/boot/gptboot");
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}
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/* No partcode except for non-UEFI GPT */
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return (NULL);
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}
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