2N/A/* bsdlabel.c - Read BSD style partition tables. */
2N/A/*
2N/A * GRUB -- GRand Unified Bootloader
2N/A * Copyright (C) 2002,2004,2005,2006,2007,2008,2009 Free Software Foundation, Inc.
2N/A *
2N/A * GRUB is free software: you can redistribute it and/or modify
2N/A * it under the terms of the GNU General Public License as published by
2N/A * the Free Software Foundation, either version 3 of the License, or
2N/A * (at your option) any later version.
2N/A *
2N/A * GRUB is distributed in the hope that it will be useful,
2N/A * but WITHOUT ANY WARRANTY; without even the implied warranty of
2N/A * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
2N/A * GNU General Public License for more details.
2N/A *
2N/A * You should have received a copy of the GNU General Public License
2N/A * along with GRUB. If not, see <http://www.gnu.org/licenses/>.
2N/A */
2N/A
2N/A#include <grub/partition.h>
2N/A#include <grub/bsdlabel.h>
2N/A#include <grub/disk.h>
2N/A#include <grub/mm.h>
2N/A#include <grub/misc.h>
2N/A#include <grub/dl.h>
2N/A#include <grub/msdos_partition.h>
2N/A#include <grub/i18n.h>
2N/A
2N/AGRUB_MOD_LICENSE ("GPLv3+");
2N/A
2N/A#ifdef GRUB_UTIL
2N/A#include <grub/emu/misc.h>
2N/A#endif
2N/A
2N/Astatic struct grub_partition_map grub_bsdlabel_partition_map;
2N/Astatic struct grub_partition_map grub_netbsdlabel_partition_map;
2N/Astatic struct grub_partition_map grub_openbsdlabel_partition_map;
2N/A
2N/A
2N/A
2N/Astatic grub_err_t
2N/Aiterate_real (grub_disk_t disk, grub_disk_addr_t sector, int freebsd,
2N/A struct grub_partition_map *pmap,
2N/A int (*hook) (grub_disk_t disk,
2N/A const grub_partition_t partition))
2N/A{
2N/A struct grub_partition_bsd_disk_label label;
2N/A struct grub_partition p;
2N/A grub_disk_addr_t delta = 0;
2N/A grub_disk_addr_t pos;
2N/A
2N/A /* Read the BSD label. */
2N/A if (grub_disk_read (disk, sector, 0, sizeof (label), &label))
2N/A return grub_errno;
2N/A
2N/A /* Check if it is valid. */
2N/A if (label.magic != grub_cpu_to_le32 (GRUB_PC_PARTITION_BSD_LABEL_MAGIC))
2N/A return grub_error (GRUB_ERR_BAD_PART_TABLE, "no signature");
2N/A
2N/A /* A kludge to determine a base of be.offset. */
2N/A if (GRUB_PC_PARTITION_BSD_LABEL_WHOLE_DISK_PARTITION
2N/A < grub_cpu_to_le16 (label.num_partitions) && freebsd)
2N/A {
2N/A struct grub_partition_bsd_entry whole_disk_be;
2N/A
2N/A pos = sizeof (label) + sector * GRUB_DISK_SECTOR_SIZE
2N/A + sizeof (struct grub_partition_bsd_entry)
2N/A * GRUB_PC_PARTITION_BSD_LABEL_WHOLE_DISK_PARTITION;
2N/A
2N/A if (grub_disk_read (disk, pos / GRUB_DISK_SECTOR_SIZE,
2N/A pos % GRUB_DISK_SECTOR_SIZE, sizeof (whole_disk_be),
2N/A &whole_disk_be))
2N/A return grub_errno;
2N/A
2N/A delta = grub_le_to_cpu32 (whole_disk_be.offset);
2N/A }
2N/A
2N/A pos = sizeof (label) + sector * GRUB_DISK_SECTOR_SIZE;
2N/A
2N/A for (p.number = 0;
2N/A p.number < grub_cpu_to_le16 (label.num_partitions);
2N/A p.number++, pos += sizeof (struct grub_partition_bsd_entry))
2N/A {
2N/A struct grub_partition_bsd_entry be;
2N/A
2N/A if (p.number == GRUB_PC_PARTITION_BSD_LABEL_WHOLE_DISK_PARTITION)
2N/A continue;
2N/A
2N/A p.offset = pos / GRUB_DISK_SECTOR_SIZE;
2N/A p.index = pos % GRUB_DISK_SECTOR_SIZE;
2N/A
2N/A if (grub_disk_read (disk, p.offset, p.index, sizeof (be), &be))
2N/A return grub_errno;
2N/A
2N/A p.start = grub_le_to_cpu32 (be.offset);
2N/A p.len = grub_le_to_cpu32 (be.size);
2N/A p.partmap = pmap;
2N/A
2N/A if (p.len == 0)
2N/A continue;
2N/A
2N/A if (p.start < delta)
2N/A {
2N/A#ifdef GRUB_UTIL
2N/A char *partname;
2N/A /* disk->partition != NULL as 0 < delta */
2N/A partname = disk->partition ? grub_partition_get_name (disk->partition)
2N/A : "";
2N/A grub_util_warn (_("Discarding improperly nested partition (%s,%s,%s%d)"),
2N/A disk->name, partname, p.partmap->name, p.number + 1);
2N/A grub_free (partname);
2N/A#endif
2N/A continue;
2N/A }
2N/A
2N/A p.start -= delta;
2N/A
2N/A if (hook (disk, &p))
2N/A return grub_errno;
2N/A }
2N/A return GRUB_ERR_NONE;
2N/A}
2N/A
2N/Astatic grub_err_t
2N/Absdlabel_partition_map_iterate (grub_disk_t disk,
2N/A int (*hook) (grub_disk_t disk,
2N/A const grub_partition_t partition))
2N/A{
2N/A
2N/A if (disk->partition && grub_strcmp (disk->partition->partmap->name, "msdos")
2N/A == 0 && disk->partition->msdostype == GRUB_PC_PARTITION_TYPE_FREEBSD)
2N/A return iterate_real (disk, GRUB_PC_PARTITION_BSD_LABEL_SECTOR, 1,
2N/A &grub_bsdlabel_partition_map, hook);
2N/A
2N/A if (disk->partition
2N/A && (grub_strcmp (disk->partition->partmap->name, "msdos") == 0
2N/A || disk->partition->partmap == &grub_bsdlabel_partition_map
2N/A || disk->partition->partmap == &grub_netbsdlabel_partition_map
2N/A || disk->partition->partmap == &grub_openbsdlabel_partition_map))
2N/A return grub_error (GRUB_ERR_BAD_PART_TABLE, "no embedding supported");
2N/A
2N/A return iterate_real (disk, GRUB_PC_PARTITION_BSD_LABEL_SECTOR, 0,
2N/A &grub_bsdlabel_partition_map, hook);
2N/A}
2N/A
2N/A/* This is a total breakage. Even when net-/openbsd label is inside partition
2N/A it actually describes the whole disk.
2N/A */
2N/Astatic grub_err_t
2N/Anetopenbsdlabel_partition_map_iterate (grub_disk_t disk, grub_uint8_t type,
2N/A struct grub_partition_map *pmap,
2N/A int (*hook) (grub_disk_t disk,
2N/A const grub_partition_t partition))
2N/A{
2N/A int count = 0;
2N/A
2N/A auto int check_msdos (grub_disk_t dsk,
2N/A const grub_partition_t partition);
2N/A
2N/A int check_msdos (grub_disk_t dsk,
2N/A const grub_partition_t partition)
2N/A {
2N/A grub_err_t err;
2N/A
2N/A if (partition->msdostype != type)
2N/A return 0;
2N/A
2N/A err = iterate_real (dsk, partition->start
2N/A + GRUB_PC_PARTITION_BSD_LABEL_SECTOR, 0, pmap, hook);
2N/A if (err == GRUB_ERR_NONE)
2N/A {
2N/A count++;
2N/A return 1;
2N/A }
2N/A if (err == GRUB_ERR_BAD_PART_TABLE)
2N/A {
2N/A grub_errno = GRUB_ERR_NONE;
2N/A return 0;
2N/A }
2N/A grub_print_error ();
2N/A return 0;
2N/A }
2N/A
2N/A if (disk->partition && grub_strcmp (disk->partition->partmap->name, "msdos")
2N/A == 0)
2N/A return grub_error (GRUB_ERR_BAD_PART_TABLE, "no embedding supported");
2N/A
2N/A {
2N/A grub_err_t err;
2N/A err = grub_partition_msdos_iterate (disk, check_msdos);
2N/A
2N/A if (err)
2N/A return err;
2N/A if (!count)
2N/A return grub_error (GRUB_ERR_BAD_PART_TABLE, "no bsdlabel found");
2N/A }
2N/A return GRUB_ERR_NONE;
2N/A}
2N/A
2N/Astatic grub_err_t
2N/Anetbsdlabel_partition_map_iterate (grub_disk_t disk,
2N/A int (*hook) (grub_disk_t disk,
2N/A const grub_partition_t partition))
2N/A{
2N/A return netopenbsdlabel_partition_map_iterate (disk,
2N/A GRUB_PC_PARTITION_TYPE_NETBSD,
2N/A &grub_netbsdlabel_partition_map,
2N/A hook);
2N/A}
2N/A
2N/Astatic grub_err_t
2N/Aopenbsdlabel_partition_map_iterate (grub_disk_t disk,
2N/A int (*hook) (grub_disk_t disk,
2N/A const grub_partition_t partition))
2N/A{
2N/A return netopenbsdlabel_partition_map_iterate (disk,
2N/A GRUB_PC_PARTITION_TYPE_OPENBSD,
2N/A &grub_openbsdlabel_partition_map,
2N/A hook);
2N/A}
2N/A
2N/A
2N/Astatic struct grub_partition_map grub_bsdlabel_partition_map =
2N/A {
2N/A .name = "bsd",
2N/A .iterate = bsdlabel_partition_map_iterate,
2N/A };
2N/A
2N/Astatic struct grub_partition_map grub_openbsdlabel_partition_map =
2N/A {
2N/A .name = "openbsd",
2N/A .iterate = openbsdlabel_partition_map_iterate,
2N/A };
2N/A
2N/Astatic struct grub_partition_map grub_netbsdlabel_partition_map =
2N/A {
2N/A .name = "netbsd",
2N/A .iterate = netbsdlabel_partition_map_iterate,
2N/A };
2N/A
2N/A
2N/A
2N/AGRUB_MOD_INIT(part_bsd)
2N/A{
2N/A grub_partition_map_register (&grub_bsdlabel_partition_map);
2N/A grub_partition_map_register (&grub_netbsdlabel_partition_map);
2N/A grub_partition_map_register (&grub_openbsdlabel_partition_map);
2N/A}
2N/A
2N/AGRUB_MOD_FINI(part_bsd)
2N/A{
2N/A grub_partition_map_unregister (&grub_bsdlabel_partition_map);
2N/A grub_partition_map_unregister (&grub_netbsdlabel_partition_map);
2N/A grub_partition_map_unregister (&grub_openbsdlabel_partition_map);
2N/A}