b9f6bfba75
OBS-URL: https://build.opensuse.org/package/show/Base:System/parted?expand=0&rev=b55ef5bd7cab3581f84f7a143ea38fd8
161 lines
5.3 KiB
Diff
161 lines
5.3 KiB
Diff
---
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libparted/labels/gpt.c | 109 ++++++++++++++++++++++++++++++++++++++++++++++++-
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1 file changed, 107 insertions(+), 2 deletions(-)
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Index: libparted/labels/gpt.c
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===================================================================
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--- libparted/labels/gpt.c.orig 2010-05-06 15:46:05.000000000 +0200
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+++ libparted/labels/gpt.c 2010-07-08 13:29:33.000000000 +0200
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@@ -50,6 +50,11 @@
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# define _(String) (String)
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#endif /* ENABLE_NLS */
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+/* IA64 always has a properly working EFI implementation */
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+#ifndef __ia64__
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+#define GPT_SYNC_MBR
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+#endif
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+
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#define EFI_PMBR_OSTYPE_EFI 0xEE
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#define MSDOS_MBR_SIGNATURE 0xaa55
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@@ -1056,11 +1061,60 @@ error:
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return 0;
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}
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+
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+#ifdef GPT_SYNC_MBR
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+static inline unsigned char
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+_part_to_ostype (PedPartition* part)
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+{
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+ if (part->fs_type) {
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+ if (strncmp (part->fs_type->name, "fat", 3) == 0) return 0xc;
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+ if (strncmp (part->fs_type->name, "ntfs", 4) == 0) return 0x7;
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+ if (strncmp (part->fs_type->name, "hfs", 3) == 0) return 0xaf;
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+ if (strstr (part->fs_type->name, "swap")) return 0x82;
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+ }
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+ return 0x83; // Everything else is Linux
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+}
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+
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+static inline PedPartition*
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+_find_first_part (const PedDisk* disk)
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+{
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+ PedPartition *retval = NULL, *part = NULL;
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+ uint64_t lowest_end = 0xffffffffffffffff;
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+ while (part = ped_disk_next_partition (disk, part)) {
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+ if (part->geom.start == 0 || part->type == PED_PARTITION_METADATA
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+ || part->type == PED_PARTITION_FREESPACE)
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+ continue;
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+ if (part->geom.end < lowest_end) {
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+ retval = part;
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+ lowest_end = part->geom.end;
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+ }
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+ }
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+ return retval;
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+}
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+
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+static inline uint32_t
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+_part_32bitmax (uint64_t in)
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+{
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+ if (in > 0xFFFFFFFFULL)
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+ return 0xFFFFFFFF;
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+ else
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+ return (uint32_t)in;
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+}
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+#endif
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+
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+
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#ifndef DISCOVER_ONLY
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/* Write the protective MBR (to keep DOS happy) */
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static int
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-_write_pmbr (PedDevice *dev)
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+_write_pmbr (const PedDisk *disk)
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{
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+ PedDevice * dev = disk->dev;
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+
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+#ifdef GPT_SYNC_MBR
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+ int i, pmbr_id, first_entry = 0, last_entry = 3;
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+ PedPartition *part = NULL, *esp;
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+#endif
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+
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/* The UEFI spec is not clear about what to do with the following
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elements of the Protective MBR (pmbr): BootCode (0-440B),
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UniqueMBRSignature (440B-444B) and Unknown (444B-446B).
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@@ -1070,10 +1124,13 @@ _write_pmbr (PedDevice *dev)
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return 0;
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LegacyMBR_t *pmbr = s0;
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+#ifndef GPT_SYNC_MBR
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/* Zero out the legacy partitions. */
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memset (pmbr->PartitionRecord, 0, sizeof pmbr->PartitionRecord);
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+#endif
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pmbr->Signature = PED_CPU_TO_LE16 (MSDOS_MBR_SIGNATURE);
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+#ifndef GPT_SYNC_MBR
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pmbr->PartitionRecord[0].OSType = EFI_PMBR_OSTYPE_EFI;
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pmbr->PartitionRecord[0].StartSector = 1;
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pmbr->PartitionRecord[0].EndHead = 0xFE;
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@@ -1084,6 +1141,54 @@ _write_pmbr (PedDevice *dev)
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pmbr->PartitionRecord[0].SizeInLBA = PED_CPU_TO_LE32 (0xFFFFFFFF);
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else
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pmbr->PartitionRecord[0].SizeInLBA = PED_CPU_TO_LE32 (dev->length - 1UL);
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+#else
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+ /* Search for an EFI System Partition */
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+ esp = _find_first_part(disk);
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+ if (!esp || !esp->fs_type || strncmp (esp->fs_type->name, "fat", 3) != 0)
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+ esp = NULL;
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+
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+ pmbr_id = 3;
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+ if (esp) {
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+ pmbr_id = 0;
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+ first_entry = 1;
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+ last_entry = 4;
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+ }
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+
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+ /* Write a pseudo-PMBR so Linux is happy */
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+ pmbr->PartitionRecord[pmbr_id].OSType = EFI_PMBR_OSTYPE_EFI;
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+ pmbr->PartitionRecord[pmbr_id].StartSector = 1;
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+ pmbr->PartitionRecord[pmbr_id].EndHead = 0xFE;
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+ pmbr->PartitionRecord[pmbr_id].EndSector = 0xFF;
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+ pmbr->PartitionRecord[pmbr_id].EndTrack = 0xFF;
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+ pmbr->PartitionRecord[pmbr_id].StartingLBA = PED_CPU_TO_LE32(1);
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+ pmbr->PartitionRecord[pmbr_id].SizeInLBA = 1;
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+ if (esp)
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+ pmbr->PartitionRecord[pmbr_id].SizeInLBA = esp->geom.end - 1;
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+
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+ /* sync the first 3 GPT entries to MBR primary partitions */
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+ for (i=first_entry; i < last_entry; i++) {
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+ part = ped_disk_next_partition (disk, part);
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+ if (part == NULL)
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+ break;
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+ /* we might get a starting garbage partition */
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+ if (part->geom.start == 0 || part->type == PED_PARTITION_METADATA || part->type == PED_PARTITION_FREESPACE || part == esp) {
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+ i--;
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+ continue;
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+ }
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+ pmbr->PartitionRecord[i].OSType = _part_to_ostype(part);
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+ pmbr->PartitionRecord[i].StartSector = 1;
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+ pmbr->PartitionRecord[i].StartHead = 0xFE;
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+ pmbr->PartitionRecord[i].StartSector = 0xFF;
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+ pmbr->PartitionRecord[i].StartTrack = 0xFF;
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+ pmbr->PartitionRecord[i].EndHead = 0xFE;
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+ pmbr->PartitionRecord[i].EndSector = 0xFF;
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+ pmbr->PartitionRecord[i].EndTrack = 0xFF;
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+ pmbr->PartitionRecord[i].StartingLBA = _part_32bitmax(part->geom.start);
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+ if(((GPTPartitionData*)part->disk_specific)->boot)
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+ pmbr->PartitionRecord[i].BootIndicator = 0x80;
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+ pmbr->PartitionRecord[i].SizeInLBA = _part_32bitmax(part->geom.end - part->geom.start);
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+ }
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+#endif
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int write_ok = ped_device_write (dev, pmbr, GPT_PMBR_LBA,
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GPT_PMBR_SECTORS);
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@@ -1198,7 +1303,7 @@ gpt_write (const PedDisk *disk)
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ptes_crc = efi_crc32 (ptes, ptes_size);
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/* Write protective MBR */
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- if (!_write_pmbr (disk->dev))
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+ if (!_write_pmbr (disk))
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goto error_free_ptes;
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/* Write PTH and PTEs */
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