grub2/0142-grub-probe-Add-PARTUUID-detection-support.patch
Peter Jones 6b2dd0f731 Another arm building fix.
Signed-off-by: Peter Jones <pjones@redhat.com>
2018-07-12 10:56:34 -04:00

100 lines
2.9 KiB
Diff

From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Nicholas Vinson <nvinson234@gmail.com>
Date: Mon, 16 Apr 2018 22:36:25 -0700
Subject: [PATCH] grub-probe: Add PARTUUID detection support
Add PARTUUID detection support grub-probe for MBR and GPT partition schemes.
Signed-off-by: Nicholas Vinson <nvinson234@gmail.com>
Reviewed-by: Daniel Kiper <daniel.kiper@oracle.com>
---
util/grub-probe.c | 48 ++++++++++++++++++++++++++++++++++++++++++++++++
1 file changed, 48 insertions(+)
diff --git a/util/grub-probe.c b/util/grub-probe.c
index 21cb80fbe15..e45dbf9e049 100644
--- a/util/grub-probe.c
+++ b/util/grub-probe.c
@@ -28,6 +28,7 @@
#include <grub/partition.h>
#include <grub/msdos_partition.h>
#include <grub/gpt_partition.h>
+#include <grub/i386/pc/boot.h>
#include <grub/emu/hostdisk.h>
#include <grub/emu/getroot.h>
#include <grub/term.h>
@@ -62,6 +63,7 @@ enum {
PRINT_DRIVE,
PRINT_DEVICE,
PRINT_PARTMAP,
+ PRINT_PARTUUID,
PRINT_ABSTRACTION,
PRINT_CRYPTODISK_UUID,
PRINT_HINT_STR,
@@ -85,6 +87,7 @@ static const char *targets[] =
[PRINT_DRIVE] = "drive",
[PRINT_DEVICE] = "device",
[PRINT_PARTMAP] = "partmap",
+ [PRINT_PARTUUID] = "partuuid",
[PRINT_ABSTRACTION] = "abstraction",
[PRINT_CRYPTODISK_UUID] = "cryptodisk_uuid",
[PRINT_HINT_STR] = "hints_string",
@@ -181,6 +184,45 @@ probe_partmap (grub_disk_t disk, char delim)
}
}
+static void
+probe_partuuid (grub_disk_t disk, char delim)
+{
+ grub_partition_t p = disk->partition;
+
+ /*
+ * Nested partitions not supported for now.
+ * Non-nested partitions must have disk->partition->parent == NULL
+ */
+ if (p && p->parent == NULL)
+ {
+ disk->partition = p->parent;
+
+ if (strcmp(p->partmap->name, "msdos") == 0)
+ {
+ /*
+ * The partition GUID for MSDOS is the partition number (starting
+ * with 1) prepended with the NT disk signature.
+ */
+ grub_uint32_t nt_disk_sig;
+
+ if (grub_disk_read (disk, 0, GRUB_BOOT_MACHINE_WINDOWS_NT_MAGIC,
+ sizeof(nt_disk_sig), &nt_disk_sig) == 0)
+ grub_printf ("%08x-%02x",
+ grub_le_to_cpu32(nt_disk_sig), 1 + p->number);
+ }
+ else if (strcmp(p->partmap->name, "gpt") == 0)
+ {
+ struct grub_gpt_partentry gptdata;
+
+ if (grub_disk_read (disk, p->offset, p->index,
+ sizeof(gptdata), &gptdata) == 0)
+ print_gpt_guid(gptdata.guid);
+ }
+
+ disk->partition = p;
+ }
+}
+
static void
probe_cryptodisk_uuid (grub_disk_t disk, char delim)
{
@@ -635,6 +677,12 @@ probe (const char *path, char **device_names, char delim)
/* Check if dev->disk itself is contained in a partmap. */
probe_partmap (dev->disk, delim);
+ else if (print == PRINT_PARTUUID)
+ {
+ probe_partuuid (dev->disk, delim);
+ putchar (delim);
+ }
+
else if (print == PRINT_MSDOS_PARTTYPE)
{
if (dev->disk->partition