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From 13d76e946f149e21c67938e7dadcbb3db9019b17 Mon Sep 17 00:00:00 2001
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From: Andrey Borzenkov <arvidjaar@gmail.com>
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Date: Mon, 25 Feb 2013 22:11:06 +0100
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Subject: [PATCH 156/364] * Makefile.util.def: Add partmap/msdos.c to
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common library. * include/grub/msdos_partition.h: Add
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GRUB_PC_PARTITION_TYPE_LDM * grub-core/disk/ldm.c: Check for existence of
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GRUB_PC_PARTITION_TYPE_LDM.
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---
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ChangeLog | 7 +++++++
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Makefile.util.def | 2 +-
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grub-core/disk/ldm.c | 42 ++++++++++++++++++++++++++++++++++++++++--
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include/grub/msdos_partition.h | 1 +
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4 files changed, 49 insertions(+), 3 deletions(-)
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diff --git a/ChangeLog b/ChangeLog
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index ff5a558..107c049 100644
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--- a/ChangeLog
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+++ b/ChangeLog
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@@ -1,3 +1,10 @@
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+2013-02-25 Andrey Borzenkov <arvidjaar@gmail.com>
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+
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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
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+ * grub-core/disk/ldm.c: Check for existence of
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+ GRUB_PC_PARTITION_TYPE_LDM.
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+
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2013-02-25 Vladimir Serbinenko <phcoder@gmail.com>
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* grub-core/normal/misc.c (grub_normal_print_device_info): Use KiB to display
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diff --git a/Makefile.util.def b/Makefile.util.def
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index 3ee5e4e..1ccf390 100644
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--- a/Makefile.util.def
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+++ b/Makefile.util.def
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@@ -32,6 +32,7 @@ library = {
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common = grub-core/disk/ldm.c;
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common = grub-core/disk/diskfilter.c;
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common = grub-core/partmap/gpt.c;
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+ common = grub-core/partmap/msdos.c;
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};
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library = {
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@@ -110,7 +111,6 @@ library = {
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common = grub-core/partmap/acorn.c;
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common = grub-core/partmap/amiga.c;
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common = grub-core/partmap/apple.c;
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- common = grub-core/partmap/msdos.c;
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common = grub-core/partmap/sun.c;
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common = grub-core/partmap/plan.c;
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common = grub-core/partmap/dvh.c;
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diff --git a/grub-core/disk/ldm.c b/grub-core/disk/ldm.c
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index b92433d..a2e26b2 100644
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--- a/grub-core/disk/ldm.c
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+++ b/grub-core/disk/ldm.c
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@@ -22,6 +22,7 @@
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#include <grub/err.h>
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#include <grub/misc.h>
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#include <grub/diskfilter.h>
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+#include <grub/msdos_partition.h>
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#include <grub/gpt_partition.h>
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#include <grub/i18n.h>
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@@ -103,6 +104,37 @@ read_int (grub_uint8_t *in, grub_size_t s)
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return ret;
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}
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+static int
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+check_ldm_partition (grub_disk_t disk __attribute__ ((unused)), const grub_partition_t p, void *data)
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+{
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+ int *has_ldm = data;
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+
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+ if (p->number >= 4)
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+ return 1;
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+ if (p->msdostype == GRUB_PC_PARTITION_TYPE_LDM)
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+ {
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+ *has_ldm = 1;
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+ return 1;
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+ }
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+ return 0;
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+}
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+
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+static int
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+msdos_has_ldm_partition (grub_disk_t dsk)
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+{
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+ grub_err_t err;
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+ int has_ldm = 0;
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+
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+ err = grub_partition_msdos_iterate (dsk, check_ldm_partition, &has_ldm);
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+ if (err)
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+ {
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+ grub_errno = GRUB_ERR_NONE;
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+ return 0;
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+ }
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+
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+ return has_ldm;
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+}
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+
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static const grub_gpt_part_type_t ldm_type = GRUB_GPT_PARTITION_TYPE_LDM;
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/* Helper for gpt_ldm_sector. */
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@@ -760,17 +792,20 @@ grub_ldm_detect (grub_disk_t disk,
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{
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int i;
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+ int has_ldm = msdos_has_ldm_partition (disk);
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for (i = 0; i < 3; i++)
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{
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grub_disk_addr_t sector = LDM_LABEL_SECTOR;
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switch (i)
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{
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case 0:
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+ if (!has_ldm)
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+ continue;
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sector = LDM_LABEL_SECTOR;
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break;
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case 1:
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/* LDM is never inside a partition. */
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- if (disk->partition)
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+ if (!has_ldm || disk->partition)
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continue;
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sector = grub_disk_get_size (disk);
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if (sector == GRUB_DISK_SIZE_UNKNOWN)
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@@ -871,6 +906,7 @@ int
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grub_util_is_ldm (grub_disk_t disk)
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{
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int i;
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+ int has_ldm = msdos_has_ldm_partition (disk);
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for (i = 0; i < 3; i++)
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{
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grub_disk_addr_t sector = LDM_LABEL_SECTOR;
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@@ -880,11 +916,13 @@ grub_util_is_ldm (grub_disk_t disk)
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switch (i)
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{
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case 0:
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+ if (!has_ldm)
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+ continue;
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sector = LDM_LABEL_SECTOR;
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break;
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case 1:
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/* LDM is never inside a partition. */
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- if (disk->partition)
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+ if (!has_ldm || disk->partition)
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continue;
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sector = grub_disk_get_size (disk);
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if (sector == GRUB_DISK_SIZE_UNKNOWN)
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diff --git a/include/grub/msdos_partition.h b/include/grub/msdos_partition.h
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index 1e9b65e..92f8539 100644
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--- a/include/grub/msdos_partition.h
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+++ b/include/grub/msdos_partition.h
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@@ -43,6 +43,7 @@
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#define GRUB_PC_PARTITION_TYPE_FAT16_LBA 0xe
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#define GRUB_PC_PARTITION_TYPE_WIN95_EXTENDED 0xf
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#define GRUB_PC_PARTITION_TYPE_PLAN9 0x39
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+#define GRUB_PC_PARTITION_TYPE_LDM 0x42
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#define GRUB_PC_PARTITION_TYPE_EZD 0x55
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#define GRUB_PC_PARTITION_TYPE_MINIX 0x80
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#define GRUB_PC_PARTITION_TYPE_LINUX_MINIX 0x81
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--
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1.8.1.4
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