grub/grub-core/partmap/bsdlabel.c

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/* bsdlabel.c - Read BSD style partition tables. */
/*
* GRUB -- GRand Unified Bootloader
* Copyright (C) 2002,2004,2005,2006,2007,2008,2009 Free Software Foundation, Inc.
*
* GRUB 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 3 of the License, or
* (at your option) any later version.
*
* GRUB 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 GRUB. If not, see <http://www.gnu.org/licenses/>.
*/
#include <grub/partition.h>
#include <grub/bsdlabel.h>
#include <grub/disk.h>
#include <grub/mm.h>
#include <grub/misc.h>
#include <grub/dl.h>
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#include <grub/msdos_partition.h>
* grub-core/commands/acpihalt.c: Gettextized. * grub-core/commands/cacheinfo.c: Likewise. * grub-core/commands/cmp.c: Likewise. * grub-core/commands/efi/loadbios.c: Likewise. * grub-core/commands/gptsync.c: Likewise. * grub-core/commands/ieee1275/suspend.c: Likewise. * grub-core/commands/legacycfg.c: Likewise. * grub-core/commands/memrw.c: Likewise. * grub-core/commands/minicmd.c: Likewise. * grub-core/commands/parttool.c: Likewise. * grub-core/commands/time.c: Likewise. * grub-core/commands/videoinfo.c: Likewise. * grub-core/disk/geli.c: Likewise. * grub-core/disk/i386/pc/biosdisk.c: Likewise. * grub-core/disk/luks.c: Likewise. * grub-core/disk/lvm.c: Likewise. * grub-core/font/font_cmd.c: Likewise. * grub-core/fs/zfs/zfscrypt.c: Likewise. * grub-core/fs/zfs/zfsinfo.c: Likewise. * grub-core/gfxmenu/view.c: Likewise. * grub-core/kern/emu/hostdisk.c: Likewise. * grub-core/kern/emu/main.c: Likewise. * grub-core/kern/emu/misc.c: Likewise. * grub-core/kern/emu/mm.c: Likewise. * grub-core/kern/mips/arc/init.c: Likewise. * grub-core/kern/mips/loongson/init.c: Likewise. * grub-core/kern/partition.c: Likewise. * grub-core/lib/i386/halt.c: Likewise. * grub-core/lib/mips/arc/reboot.c: Likewise. * grub-core/lib/mips/loongson/reboot.c: Likewise. * grub-core/loader/i386/pc/chainloader.c: Likewise. * grub-core/loader/i386/xnu.c: Likewise. * grub-core/loader/multiboot.c: Likewise. * grub-core/net/bootp.c: Likewise. * grub-core/net/net.c: Likewise. * grub-core/normal/term.c: Likewise. * grub-core/partmap/bsdlabel.c: Likewise. * grub-core/parttool/msdospart.c: Likewise. * grub-core/term/gfxterm.c: Likewise. * grub-core/term/terminfo.c: Likewise. * grub-core/video/i386/pc/vbe.c: Likewise. * util/grub-menulst2cfg.c: Likewise. * util/grub-mkdevicemap.c: Likewise. * util/grub-mklayout.c: Likewise. * util/grub-mkrelpath.c: Likewise. * util/grub-script-check.c: Likewise. * util/ieee1275/grub-ofpathname.c: Likewise. * util/resolve.c: Likewise.
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#include <grub/i18n.h>
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GRUB_MOD_LICENSE ("GPLv3+");
#ifdef GRUB_UTIL
#include <grub/emu/misc.h>
#endif
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static struct grub_partition_map grub_bsdlabel_partition_map;
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static struct grub_partition_map grub_netbsdlabel_partition_map;
static struct grub_partition_map grub_openbsdlabel_partition_map;
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static grub_err_t
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iterate_real (grub_disk_t disk, grub_disk_addr_t sector, int freebsd,
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struct grub_partition_map *pmap,
grub_partition_iterate_hook_t hook, void *hook_data)
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{
struct grub_partition_bsd_disk_label label;
struct grub_partition p;
grub_disk_addr_t delta = 0;
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grub_disk_addr_t pos;
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/* Read the BSD label. */
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if (grub_disk_read (disk, sector, 0, sizeof (label), &label))
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return grub_errno;
/* Check if it is valid. */
if (label.magic != grub_cpu_to_le32_compile_time (GRUB_PC_PARTITION_BSD_LABEL_MAGIC))
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return grub_error (GRUB_ERR_BAD_PART_TABLE, "no signature");
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/* A kludge to determine a base of be.offset. */
if (GRUB_PC_PARTITION_BSD_LABEL_WHOLE_DISK_PARTITION
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< grub_cpu_to_le16 (label.num_partitions) && freebsd)
{
struct grub_partition_bsd_entry whole_disk_be;
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pos = sizeof (label) + sector * GRUB_DISK_SECTOR_SIZE
+ sizeof (struct grub_partition_bsd_entry)
* GRUB_PC_PARTITION_BSD_LABEL_WHOLE_DISK_PARTITION;
if (grub_disk_read (disk, pos / GRUB_DISK_SECTOR_SIZE,
pos % GRUB_DISK_SECTOR_SIZE, sizeof (whole_disk_be),
&whole_disk_be))
return grub_errno;
delta = grub_le_to_cpu32 (whole_disk_be.offset);
}
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pos = sizeof (label) + sector * GRUB_DISK_SECTOR_SIZE;
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for (p.number = 0;
p.number < grub_cpu_to_le16 (label.num_partitions);
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p.number++, pos += sizeof (struct grub_partition_bsd_entry))
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{
struct grub_partition_bsd_entry be;
if (p.number == GRUB_PC_PARTITION_BSD_LABEL_WHOLE_DISK_PARTITION)
continue;
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p.offset = pos / GRUB_DISK_SECTOR_SIZE;
p.index = pos % GRUB_DISK_SECTOR_SIZE;
if (grub_disk_read (disk, p.offset, p.index, sizeof (be), &be))
return grub_errno;
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p.start = grub_le_to_cpu32 (be.offset);
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p.len = grub_le_to_cpu32 (be.size);
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p.partmap = pmap;
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if (p.len == 0)
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continue;
if (p.start < delta)
{
#ifdef GRUB_UTIL
char *partname;
/* disk->partition != NULL as 0 < delta */
partname = disk->partition ? grub_partition_get_name (disk->partition)
: 0;
* grub-core/commands/acpihalt.c: Gettextized. * grub-core/commands/cacheinfo.c: Likewise. * grub-core/commands/cmp.c: Likewise. * grub-core/commands/efi/loadbios.c: Likewise. * grub-core/commands/gptsync.c: Likewise. * grub-core/commands/ieee1275/suspend.c: Likewise. * grub-core/commands/legacycfg.c: Likewise. * grub-core/commands/memrw.c: Likewise. * grub-core/commands/minicmd.c: Likewise. * grub-core/commands/parttool.c: Likewise. * grub-core/commands/time.c: Likewise. * grub-core/commands/videoinfo.c: Likewise. * grub-core/disk/geli.c: Likewise. * grub-core/disk/i386/pc/biosdisk.c: Likewise. * grub-core/disk/luks.c: Likewise. * grub-core/disk/lvm.c: Likewise. * grub-core/font/font_cmd.c: Likewise. * grub-core/fs/zfs/zfscrypt.c: Likewise. * grub-core/fs/zfs/zfsinfo.c: Likewise. * grub-core/gfxmenu/view.c: Likewise. * grub-core/kern/emu/hostdisk.c: Likewise. * grub-core/kern/emu/main.c: Likewise. * grub-core/kern/emu/misc.c: Likewise. * grub-core/kern/emu/mm.c: Likewise. * grub-core/kern/mips/arc/init.c: Likewise. * grub-core/kern/mips/loongson/init.c: Likewise. * grub-core/kern/partition.c: Likewise. * grub-core/lib/i386/halt.c: Likewise. * grub-core/lib/mips/arc/reboot.c: Likewise. * grub-core/lib/mips/loongson/reboot.c: Likewise. * grub-core/loader/i386/pc/chainloader.c: Likewise. * grub-core/loader/i386/xnu.c: Likewise. * grub-core/loader/multiboot.c: Likewise. * grub-core/net/bootp.c: Likewise. * grub-core/net/net.c: Likewise. * grub-core/normal/term.c: Likewise. * grub-core/partmap/bsdlabel.c: Likewise. * grub-core/parttool/msdospart.c: Likewise. * grub-core/term/gfxterm.c: Likewise. * grub-core/term/terminfo.c: Likewise. * grub-core/video/i386/pc/vbe.c: Likewise. * util/grub-menulst2cfg.c: Likewise. * util/grub-mkdevicemap.c: Likewise. * util/grub-mklayout.c: Likewise. * util/grub-mkrelpath.c: Likewise. * util/grub-script-check.c: Likewise. * util/ieee1275/grub-ofpathname.c: Likewise. * util/resolve.c: Likewise.
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grub_util_warn (_("Discarding improperly nested partition (%s,%s,%s%d)"),
disk->name, partname ? : "", p.partmap->name,
p.number + 1);
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grub_free (partname);
#endif
continue;
}
p.start -= delta;
if (hook (disk, &p, hook_data))
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return grub_errno;
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}
return GRUB_ERR_NONE;
}
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static grub_err_t
bsdlabel_partition_map_iterate (grub_disk_t disk,
grub_partition_iterate_hook_t hook,
void *hook_data)
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{
if (disk->partition && grub_strcmp (disk->partition->partmap->name, "msdos")
== 0 && disk->partition->msdostype == GRUB_PC_PARTITION_TYPE_FREEBSD)
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return iterate_real (disk, GRUB_PC_PARTITION_BSD_LABEL_SECTOR, 1,
&grub_bsdlabel_partition_map, hook, hook_data);
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if (disk->partition
&& (grub_strcmp (disk->partition->partmap->name, "msdos") == 0
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|| disk->partition->partmap == &grub_bsdlabel_partition_map
|| disk->partition->partmap == &grub_netbsdlabel_partition_map
|| disk->partition->partmap == &grub_openbsdlabel_partition_map))
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return grub_error (GRUB_ERR_BAD_PART_TABLE, "no embedding supported");
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return iterate_real (disk, GRUB_PC_PARTITION_BSD_LABEL_SECTOR, 0,
&grub_bsdlabel_partition_map, hook, hook_data);
}
/* Context for netopenbsdlabel_partition_map_iterate. */
struct netopenbsdlabel_ctx
{
grub_uint8_t type;
struct grub_partition_map *pmap;
grub_partition_iterate_hook_t hook;
void *hook_data;
int count;
};
/* Helper for netopenbsdlabel_partition_map_iterate. */
static int
check_msdos (grub_disk_t dsk, const grub_partition_t partition, void *data)
{
struct netopenbsdlabel_ctx *ctx = data;
grub_err_t err;
if (partition->msdostype != ctx->type)
return 0;
err = iterate_real (dsk, partition->start
+ GRUB_PC_PARTITION_BSD_LABEL_SECTOR, 0, ctx->pmap,
ctx->hook, ctx->hook_data);
if (err == GRUB_ERR_NONE)
{
ctx->count++;
return 1;
}
if (err == GRUB_ERR_BAD_PART_TABLE)
{
grub_errno = GRUB_ERR_NONE;
return 0;
}
grub_print_error ();
return 0;
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}
/* This is a total breakage. Even when net-/openbsd label is inside partition
it actually describes the whole disk.
*/
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static grub_err_t
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netopenbsdlabel_partition_map_iterate (grub_disk_t disk, grub_uint8_t type,
struct grub_partition_map *pmap,
grub_partition_iterate_hook_t hook,
void *hook_data)
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{
if (disk->partition && grub_strcmp (disk->partition->partmap->name, "msdos")
== 0)
return grub_error (GRUB_ERR_BAD_PART_TABLE, "no embedding supported");
{
struct netopenbsdlabel_ctx ctx = {
.type = type,
.pmap = pmap,
.hook = hook,
.hook_data = hook_data,
.count = 0
};
grub_err_t err;
err = grub_partition_msdos_iterate (disk, check_msdos, &ctx);
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if (err)
return err;
if (!ctx.count)
return grub_error (GRUB_ERR_BAD_PART_TABLE, "no bsdlabel found");
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}
return GRUB_ERR_NONE;
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}
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static grub_err_t
netbsdlabel_partition_map_iterate (grub_disk_t disk,
grub_partition_iterate_hook_t hook,
void *hook_data)
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{
return netopenbsdlabel_partition_map_iterate (disk,
GRUB_PC_PARTITION_TYPE_NETBSD,
&grub_netbsdlabel_partition_map,
hook, hook_data);
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}
static grub_err_t
openbsdlabel_partition_map_iterate (grub_disk_t disk,
grub_partition_iterate_hook_t hook,
void *hook_data)
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{
return netopenbsdlabel_partition_map_iterate (disk,
GRUB_PC_PARTITION_TYPE_OPENBSD,
&grub_openbsdlabel_partition_map,
hook, hook_data);
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}
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static struct grub_partition_map grub_bsdlabel_partition_map =
{
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.name = "bsd",
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.iterate = bsdlabel_partition_map_iterate,
};
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static struct grub_partition_map grub_openbsdlabel_partition_map =
{
.name = "openbsd",
.iterate = openbsdlabel_partition_map_iterate,
};
static struct grub_partition_map grub_netbsdlabel_partition_map =
{
.name = "netbsd",
.iterate = netbsdlabel_partition_map_iterate,
};
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GRUB_MOD_INIT(part_bsd)
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{
grub_partition_map_register (&grub_bsdlabel_partition_map);
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grub_partition_map_register (&grub_netbsdlabel_partition_map);
grub_partition_map_register (&grub_openbsdlabel_partition_map);
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}
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GRUB_MOD_FINI(part_bsd)
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{
grub_partition_map_unregister (&grub_bsdlabel_partition_map);
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grub_partition_map_unregister (&grub_netbsdlabel_partition_map);
grub_partition_map_unregister (&grub_openbsdlabel_partition_map);
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}