From cfb23fa541ada431b8225760371bb4d5029893b1 Mon Sep 17 00:00:00 2001

From: Daniel Battaiola Kreling <dbkreling@br.ibm.com>

Date: Mon, 7 Oct 2013 11:51:50 +0530

Subject: [PATCH] GPT: add support for PReP GUID (#1108196)

PReP (PowerPC Reference Platform) boot partition is the first partition used in

PowerPC platform for containing the bootable kernel or bootloader. The firmware

searches for this partition and jumps to it for booting. So far no GUID was

specified for this partition type and hence booting from GPT disk was not

supported on this platform. A new GUID 9e1a2d38-c612-4316-aa26-8b49521e5a8b for

PReP partition is proposed to be included in GPT.

Resolves: rhbz#1108196

Signed-off-by: Brian C. Lane <bcl@redhat.com>

---

 NEWS                   |  7 +++++++

 doc/parted.texi        |  2 +-

 libparted/labels/gpt.c | 37 +++++++++++++++++++++++++++++++++++++

 3 files changed, 45 insertions(+), 1 deletion(-)

diff --git a/NEWS b/NEWS

index 80a62d6..4d30b1b 100644

--- a/NEWS

+++ b/NEWS

@@ -1,5 +1,12 @@

 GNU parted NEWS                                    -*- outline -*-

+* Noteworthy changes in release 3.1-18 (2014-08-12) [RHEL7.1]

+

+** New features

+

+  Add support for prep flag to GPT to select PowerPC Reference Platform

+  boot partition type.

+

 * Noteworthy changes in release 3.1-16 (2014-01-22) [RHEL7]

 ** Bug Fixes

diff --git a/doc/parted.texi b/doc/parted.texi

index 2b1ce64..f10d5e1 100644

--- a/doc/parted.texi

+++ b/doc/parted.texi

@@ -823,7 +823,7 @@ physical volume.

 by the Linux/PA-RISC boot loader, palo.

 @item PREP

-(MS-DOS) - this flag can be enabled so that the partition can be used

+(MS-DOS, GPT) - this flag can be enabled so that the partition can be used

 as a PReP boot partition on PowerPC PReP or IBM RS6K/CHRP hardware.

 @item DIAG

diff --git a/libparted/labels/gpt.c b/libparted/labels/gpt.c

index 6ca33c8..f9332bd 100644

--- a/libparted/labels/gpt.c

+++ b/libparted/labels/gpt.c

@@ -142,6 +142,10 @@ typedef struct

     ((efi_guid_t) { PED_CPU_TO_LE32 (0x5265636F), PED_CPU_TO_LE16 (0x7665), \

                     PED_CPU_TO_LE16 (0x11AA), 0xaa, 0x11, \

                     { 0x00, 0x30, 0x65, 0x43, 0xEC, 0xAC }})

+#define PARTITION_PREP_GUID \

+    ((efi_guid_t) { PED_CPU_TO_LE32 (0x9e1a2d38), PED_CPU_TO_LE16 (0xc612), \

+                    PED_CPU_TO_LE16 (0x4316), 0xaa, 0x26, \

+                    { 0x8b, 0x49, 0x52, 0x1e, 0x5a, 0x8b }})

 struct __attribute__ ((packed)) _GuidPartitionTableHeader_t

 {

@@ -283,6 +287,7 @@ typedef struct _GPTPartitionData

   int atvrecv;

   int msftrecv;

   int legacy_boot;

+  int prep;

 } GPTPartitionData;

 static PedDiskType gpt_disk_type;

@@ -782,6 +787,7 @@ _parse_part_entry (PedDisk *disk, GuidPartitionEntry_t *pte)

     = gpt_part_data->hidden = gpt_part_data->msftres

     = gpt_part_data->msftrecv

     = gpt_part_data->legacy_boot

+    = gpt_part_data->prep

     = gpt_part_data->bios_grub = gpt_part_data->atvrecv = 0;

   if (pte->Attributes.RequiredToFunction & 0x1)

@@ -805,6 +811,8 @@ _parse_part_entry (PedDisk *disk, GuidPartitionEntry_t *pte)

     gpt_part_data->msftrecv = 1;

   else if (!guid_cmp (gpt_part_data->type, PARTITION_APPLE_TV_RECOVERY_GUID))

     gpt_part_data->atvrecv = 1;

+  else if (!guid_cmp (gpt_part_data->type, PARTITION_PREP_GUID))

+    gpt_part_data->prep = 1;

   return part;

 }

@@ -1321,6 +1329,7 @@ gpt_partition_new (const PedDisk *disk,

   gpt_part_data->msftrecv = 0;

   gpt_part_data->atvrecv = 0;

   gpt_part_data->legacy_boot = 0;

+  gpt_part_data->prep = 0;

   uuid_generate ((unsigned char *) &gpt_part_data->uuid);

   swap_uuid_and_efi_guid ((unsigned char *) (&gpt_part_data->uuid));

   memset (gpt_part_data->name, 0, sizeof gpt_part_data->name);

@@ -1394,6 +1403,11 @@ gpt_partition_set_system (PedPartition *part,

       gpt_part_data->type = PARTITION_RAID_GUID;

       return 1;

     }

+  if (gpt_part_data->prep)

+    {

+      gpt_part_data->type = PARTITION_PREP_GUID;

+      return 1;

+    }

   if (gpt_part_data->boot)

     {

       gpt_part_data->type = PARTITION_SYSTEM_GUID;

@@ -1564,6 +1578,7 @@ gpt_partition_set_flag (PedPartition *part, PedPartitionFlag flag, int state)

           = gpt_part_data->hp_service

           = gpt_part_data->msftres

           = gpt_part_data->msftrecv

+          = gpt_part_data->prep

           = gpt_part_data->atvrecv = 0;

       return gpt_partition_set_system (part, part->fs_type);

     case PED_PARTITION_BIOS_GRUB:

@@ -1575,6 +1590,7 @@ gpt_partition_set_flag (PedPartition *part, PedPartitionFlag flag, int state)

           = gpt_part_data->hp_service

           = gpt_part_data->msftres

           = gpt_part_data->msftrecv

+          = gpt_part_data->prep

           = gpt_part_data->atvrecv = 0;

       return gpt_partition_set_system (part, part->fs_type);

     case PED_PARTITION_RAID:

@@ -1586,6 +1602,7 @@ gpt_partition_set_flag (PedPartition *part, PedPartitionFlag flag, int state)

           = gpt_part_data->hp_service

           = gpt_part_data->msftres

           = gpt_part_data->msftrecv

+          = gpt_part_data->prep

           = gpt_part_data->atvrecv = 0;

       return gpt_partition_set_system (part, part->fs_type);

     case PED_PARTITION_LVM:

@@ -1597,6 +1614,7 @@ gpt_partition_set_flag (PedPartition *part, PedPartitionFlag flag, int state)

           = gpt_part_data->hp_service

           = gpt_part_data->msftres

           = gpt_part_data->msftrecv

+          = gpt_part_data->prep

           = gpt_part_data->atvrecv = 0;

       return gpt_partition_set_system (part, part->fs_type);

     case PED_PARTITION_HPSERVICE:

@@ -1608,6 +1626,7 @@ gpt_partition_set_flag (PedPartition *part, PedPartitionFlag flag, int state)

           = gpt_part_data->bios_grub

           = gpt_part_data->msftres

           = gpt_part_data->msftrecv

+          = gpt_part_data->prep

           = gpt_part_data->atvrecv = 0;

       return gpt_partition_set_system (part, part->fs_type);

     case PED_PARTITION_MSFT_RESERVED:

@@ -1619,6 +1638,7 @@ gpt_partition_set_flag (PedPartition *part, PedPartitionFlag flag, int state)

           = gpt_part_data->bios_grub

           = gpt_part_data->hp_service

           = gpt_part_data->msftrecv

+          = gpt_part_data->prep

           = gpt_part_data->atvrecv = 0;

       return gpt_partition_set_system (part, part->fs_type);

     case PED_PARTITION_DIAG:

@@ -1630,6 +1650,7 @@ gpt_partition_set_flag (PedPartition *part, PedPartitionFlag flag, int state)

           = gpt_part_data->bios_grub

           = gpt_part_data->hp_service

           = gpt_part_data->msftres

+          = gpt_part_data->prep

           = gpt_part_data->atvrecv = 0;

       return gpt_partition_set_system (part, part->fs_type);

     case PED_PARTITION_APPLE_TV_RECOVERY:

@@ -1641,8 +1662,21 @@ gpt_partition_set_flag (PedPartition *part, PedPartitionFlag flag, int state)

           = gpt_part_data->bios_grub

           = gpt_part_data->hp_service

           = gpt_part_data->msftres

+          = gpt_part_data->prep

           = gpt_part_data->msftrecv = 0;

       return gpt_partition_set_system (part, part->fs_type);

+    case PED_PARTITION_PREP:

+      gpt_part_data->prep = state;

+      if (state)

+        gpt_part_data->boot

+          = gpt_part_data->raid

+          = gpt_part_data->lvm

+          = gpt_part_data->bios_grub

+          = gpt_part_data->hp_service

+          = gpt_part_data->msftres

+          = gpt_part_data->msftrecv

+          = gpt_part_data->atvrecv = 0;

+      return gpt_partition_set_system (part, part->fs_type);

     case PED_PARTITION_HIDDEN:

       gpt_part_data->hidden = state;

       return 1;

@@ -1687,6 +1721,8 @@ gpt_partition_get_flag (const PedPartition *part, PedPartitionFlag flag)

       return gpt_part_data->hidden;

     case PED_PARTITION_LEGACY_BOOT:

       return gpt_part_data->legacy_boot;

+    case PED_PARTITION_PREP:

+      return gpt_part_data->prep;

     case PED_PARTITION_SWAP:

     case PED_PARTITION_LBA:

     case PED_PARTITION_ROOT:

@@ -1712,6 +1748,7 @@ gpt_partition_is_flag_available (const PedPartition *part,

     case PED_PARTITION_APPLE_TV_RECOVERY:

     case PED_PARTITION_HIDDEN:

     case PED_PARTITION_LEGACY_BOOT:

+    case PED_PARTITION_PREP:

       return 1;

     case PED_PARTITION_SWAP:

     case PED_PARTITION_ROOT:

-- 

1.9.3