[parted-devel] [PATCH parted] gpt: Fix endianness issue when using pth->FirstUsableLBA.

[Richard W.M. Jones]

Full explanation is here:

https://bugzilla.redhat.com/show_bug.cgi?id=829960#c6

Rich.

-- 
Richard Jones, Virtualization Group, Red Hat http://people.redhat.com/~rjones
virt-p2v converts physical machines to virtual machines.  Boot with a
live CD or over the network (PXE) and turn machines into Xen guests.
http://et.redhat.com/~rjones/virt-p2v
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>From 54bfe3fac90465b2b5150d8d8dac88511b869fd7 Mon Sep 17 00:00:00 2001
From: Fedora Ninjas <parted-owner at fedoraproject.org>
Date: Fri, 8 Jun 2012 13:19:25 +0100
Subject: [PATCH] gpt: Fix endianness issue when using pth->FirstUsableLBA.

Signed-off-by: Richard W.M. Jones <rjones at redhat.com>
---
 libparted/labels/gpt.c |    4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/libparted/labels/gpt.c b/libparted/labels/gpt.c
index 4c72cd2..3c26489 100644
--- a/libparted/labels/gpt.c
+++ b/libparted/labels/gpt.c
@@ -1792,12 +1792,12 @@ gpt_get_max_supported_partition_count (const PedDisk *disk, int *max_n)
 
   if (!_header_is_valid (disk, pth, 1))
     {
-      pth->FirstUsableLBA = 34;
+      pth->FirstUsableLBA = PED_CPU_TO_LE64 (34);
       pth->SizeOfPartitionEntry
         = PED_CPU_TO_LE32 (sizeof (GuidPartitionEntry_t));
     }
 
-  *max_n = (disk->dev->sector_size * (pth->FirstUsableLBA - 2)
+  *max_n = (disk->dev->sector_size * (PED_LE64_TO_CPU (pth->FirstUsableLBA)-2)
             / PED_LE32_TO_CPU (pth->SizeOfPartitionEntry));
   pth_free (pth);
   return true;
-- 
1.7.10.1