From afa175e51f263d3090d1ba078bed97c7204ed986 Mon Sep 17 00:00:00 2001 From: Andrey Borzenkov Date: Mon, 25 Feb 2013 22:11:06 +0100 Subject: [PATCH 157/471] * Makefile.util.def: Add partmap/msdos.c to common library. * 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. --- ChangeLog | 7 +++++++ Makefile.util.def | 2 +- grub-core/disk/ldm.c | 42 ++++++++++++++++++++++++++++++++++++++++-- include/grub/msdos_partition.h | 1 + 4 files changed, 49 insertions(+), 3 deletions(-) diff --git a/ChangeLog b/ChangeLog index ff5a558..107c049 100644 --- a/ChangeLog +++ b/ChangeLog @@ -1,3 +1,10 @@ +2013-02-25 Andrey Borzenkov + + * Makefile.util.def: Add partmap/msdos.c to common library. + * 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. + 2013-02-25 Vladimir Serbinenko * grub-core/normal/misc.c (grub_normal_print_device_info): Use KiB to display diff --git a/Makefile.util.def b/Makefile.util.def index 3ee5e4e..1ccf390 100644 --- a/Makefile.util.def +++ b/Makefile.util.def @@ -32,6 +32,7 @@ library = { common = grub-core/disk/ldm.c; common = grub-core/disk/diskfilter.c; common = grub-core/partmap/gpt.c; + common = grub-core/partmap/msdos.c; }; library = { @@ -110,7 +111,6 @@ library = { common = grub-core/partmap/acorn.c; common = grub-core/partmap/amiga.c; common = grub-core/partmap/apple.c; - common = grub-core/partmap/msdos.c; common = grub-core/partmap/sun.c; common = grub-core/partmap/plan.c; common = grub-core/partmap/dvh.c; diff --git a/grub-core/disk/ldm.c b/grub-core/disk/ldm.c index b92433d..a2e26b2 100644 --- a/grub-core/disk/ldm.c +++ b/grub-core/disk/ldm.c @@ -22,6 +22,7 @@ #include #include #include +#include #include #include @@ -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) diff --git a/include/grub/msdos_partition.h b/include/grub/msdos_partition.h index 1e9b65e..92f8539 100644 --- a/include/grub/msdos_partition.h +++ b/include/grub/msdos_partition.h @@ -43,6 +43,7 @@ #define GRUB_PC_PARTITION_TYPE_FAT16_LBA 0xe #define GRUB_PC_PARTITION_TYPE_WIN95_EXTENDED 0xf #define GRUB_PC_PARTITION_TYPE_PLAN9 0x39 +#define GRUB_PC_PARTITION_TYPE_LDM 0x42 #define GRUB_PC_PARTITION_TYPE_EZD 0x55 #define GRUB_PC_PARTITION_TYPE_MINIX 0x80 #define GRUB_PC_PARTITION_TYPE_LINUX_MINIX 0x81 -- 1.8.2.1