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* Makefile.util.def: Add partmap/msdos.c to common library.

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* include/grub/msdos_partition.h: Add GRUB_PC_PARTITION_TYPE_LDM
	* grub-core/disk/ldm.c: Check for existence of
	GRUB_PC_PARTITION_TYPE_LDM.
This commit is contained in:
Andrey Borzenkov 2013-02-25 22:11:06 +01:00 • committed by Vladimir 'phcoder' Serbinenko
parent 28d468d6f2
commit b7b78edb1c
4 changed files with 49 additions and 3 deletions
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42
grub-core/disk/ldm.c
View file

@ -22,6 +22,7 @@
#include <grub/err.h>
#include <grub/misc.h>
#include <grub/diskfilter.h>
#include <grub/msdos_partition.h>
#include <grub/gpt_partition.h>
#include <grub/i18n.h>
@ -103,6 +104,37 @@ read_int (grub_uint8_t *in, grub_size_t s)
return ret;
}
static int
check_ldm_partition (grub_disk_t disk __attribute__ ((unused)), const grub_partition_t p, void *data)
{
int *has_ldm = data;
if (p->number >= 4)
return 1;
if (p->msdostype == GRUB_PC_PARTITION_TYPE_LDM)
{
*has_ldm = 1;
return 1;
}
return 0;
}
static int
msdos_has_ldm_partition (grub_disk_t dsk)
{
grub_err_t err;
int has_ldm = 0;
err = grub_partition_msdos_iterate (dsk, check_ldm_partition, &has_ldm);
if (err)
{
grub_errno = GRUB_ERR_NONE;
return 0;
}
return has_ldm;
}
static const grub_gpt_part_type_t ldm_type = GRUB_GPT_PARTITION_TYPE_LDM;
/* Helper for gpt_ldm_sector. */
@ -760,17 +792,20 @@ grub_ldm_detect (grub_disk_t disk,
{
int i;
int has_ldm = msdos_has_ldm_partition (disk);
for (i = 0; i < 3; i++)
{
grub_disk_addr_t sector = LDM_LABEL_SECTOR;
switch (i)
{
case 0:
if (!has_ldm)
continue;
sector = LDM_LABEL_SECTOR;
break;
case 1:
/* LDM is never inside a partition. */
if (disk->partition)
if (!has_ldm || disk->partition)
continue;
sector = grub_disk_get_size (disk);
if (sector == GRUB_DISK_SIZE_UNKNOWN)
@ -871,6 +906,7 @@ int
grub_util_is_ldm (grub_disk_t disk)
{
int i;
int has_ldm = msdos_has_ldm_partition (disk);
for (i = 0; i < 3; i++)
{
grub_disk_addr_t sector = LDM_LABEL_SECTOR;
@ -880,11 +916,13 @@ grub_util_is_ldm (grub_disk_t disk)
switch (i)
{
case 0:
if (!has_ldm)
continue;
sector = LDM_LABEL_SECTOR;
break;
case 1:
/* LDM is never inside a partition. */
if (disk->partition)
if (!has_ldm || disk->partition)
continue;
sector = grub_disk_get_size (disk);
if (sector == GRUB_DISK_SIZE_UNKNOWN)