bug#15548: [PATCH RESEND] GPT: add support for PReP GUID

[Avik Sil]

From: Daniel Battaiola Kreling <address@hidden>

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.

---
 libparted/labels/gpt.c | 38 ++++++++++++++++++++++++++++++++++++++
 1 file changed, 38 insertions(+)

diff --git a/libparted/labels/gpt.c b/libparted/labels/gpt.c
index 490de70..ee8148d 100644
--- a/libparted/labels/gpt.c
+++ b/libparted/labels/gpt.c
@@ -146,6 +146,10 @@ 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
 {
@@ -288,6 +292,7 @@ typedef struct _GPTPartitionData
   int atvrecv;
   int msftrecv;
   int legacy_boot;
+  int prep;
 } GPTPartitionData;
 
 static PedDiskType gpt_disk_type;
@@ -796,6 +801,7 @@ _parse_part_entry (PedDisk *disk, GuidPartitionEntry_t *pte)
     = gpt_part_data->msftdata
     = 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)
@@ -821,6 +827,8 @@ _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;
 }
@@ -1338,6 +1346,7 @@ 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);
@@ -1411,6 +1420,11 @@ 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;
@@ -1587,6 +1601,7 @@ gpt_partition_set_flag (PedPartition *part, 
PedPartitionFlag flag, int state)
           = gpt_part_data->msftres
           = gpt_part_data->msftdata
           = 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:
@@ -1599,6 +1614,7 @@ gpt_partition_set_flag (PedPartition *part, 
PedPartitionFlag flag, int state)
           = gpt_part_data->msftres
           = gpt_part_data->msftdata
           = 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:
@@ -1611,6 +1627,7 @@ gpt_partition_set_flag (PedPartition *part, 
PedPartitionFlag flag, int state)
           = gpt_part_data->msftres
           = gpt_part_data->msftdata
           = 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:
@@ -1623,6 +1640,7 @@ gpt_partition_set_flag (PedPartition *part, 
PedPartitionFlag flag, int state)
           = gpt_part_data->msftres
           = gpt_part_data->msftdata
           = 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:
@@ -1635,6 +1653,7 @@ gpt_partition_set_flag (PedPartition *part, 
PedPartitionFlag flag, int state)
           = gpt_part_data->msftres
           = gpt_part_data->msftdata
           = 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:
@@ -1647,6 +1666,7 @@ gpt_partition_set_flag (PedPartition *part, 
PedPartitionFlag flag, int state)
           = gpt_part_data->hp_service
           = gpt_part_data->msftdata
           = 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_DATA:
@@ -1659,6 +1679,7 @@ 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;
         gpt_part_data->msftdata = 1;
       } else {
@@ -1675,6 +1696,7 @@ gpt_partition_set_flag (PedPartition *part, 
PedPartitionFlag flag, int state)
           = gpt_part_data->hp_service
           = gpt_part_data->msftdata
           = 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:
@@ -1687,8 +1709,21 @@ gpt_partition_set_flag (PedPartition *part, 
PedPartitionFlag flag, int state)
           = gpt_part_data->hp_service
           = gpt_part_data->msftres
           = gpt_part_data->msftdata
+          = 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;
@@ -1735,6 +1770,8 @@ 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:
@@ -1761,6 +1798,7 @@ 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:
-- 
1.7.11.7