[PATCH 6/8] Sun disklabel hacks. (#697100)

[David Lehman <dlehman redhat com>]

Handle magic third partition and don't write partitions starting at
sector 0, even if it might work in some cases.
---
 pyanaconda/storage/devicetree.py   |    9 +++++++--
 pyanaconda/storage/partitioning.py |   17 +++++++++++++----
 2 files changed, 20 insertions(+), 6 deletions(-)

diff --git a/pyanaconda/storage/devicetree.py b/pyanaconda/storage/devicetree.py
index af8a6de..9d09d71 100644
--- a/pyanaconda/storage/devicetree.py
+++ b/pyanaconda/storage/devicetree.py
@@ -776,13 +776,18 @@ class DeviceTree(object):
                 devicelibs.lvm.lvm_cc_addFilterRejectRegexp(name)
                 return
 
+        # Sun disklabels have a partition that spans the entire disk as
+        # partition 3. It does not appear in the partition list. Fantastic.
+        is_sun_magic = (getattr(disk.format, "labelType", None) == "sun" and
+                        udev_device_get_minor(info) == 3)
+
         # Check that the disk has partitions. If it does not, we must have
         # reinitialized the disklabel.
         #
         # Also ignore partitions on devices we do not support partitioning
         # of, like logical volumes.
-        if not getattr(disk.format, "partitions", None) or \
-           not disk.partitionable:
+        if ((not getattr(disk.format, "partitions", None) and not is_sun_magic)
+            or not disk.partitionable):
             # When we got here because the disk does not have a disklabel
             # format (ie a biosraid member), or because it is not
             # partitionable we want LVM to ignore this partition too
diff --git a/pyanaconda/storage/partitioning.py b/pyanaconda/storage/partitioning.py
index 41ab5c5..2822812 100644
--- a/pyanaconda/storage/partitioning.py
+++ b/pyanaconda/storage/partitioning.py
@@ -351,9 +351,13 @@ def shouldClear(device, clearPartType, clearPartDisks=None):
     if isinstance(device, PartitionDevice):
         # Never clear the special first partition on a Mac disk label, as that
         # holds the partition table itself.
+        # Something similar for the third partition on a Sun disklabel.
         if device.disk.format.partedDisk.type == "mac" and \
            device.partedPartition.number == 1:
             return False
+        elif device.disk.format.labelType == "sun" and \
+             device.partedPartition.number == 3:
+            return False
 
         # If we got a list of disks to clear, make sure this one's on it
         if clearPartDisks and device.disk.name not in clearPartDisks:
@@ -494,12 +498,14 @@ def clearPartitions(storage, bootloader=None):
         if disk.format.labelType == nativeLabelType:
             continue
 
-        if disk.format.labelType == "mac":
-            # remove the magic apple partition
+        magic_partitions = {"mac": 1, "sun": 3}
+        if disk.format.labelType in magic_partitions:
+            number = magic_partitions[disk.format.labelType]
+            # remove the magic partition
             for part in storage.partitions:
-                if part.disk == disk and part.partedPartition.number == 1:
+                if part.disk == disk and part.partedPartition.number == number:
                     log.debug("clearing %s" % part.name)
-                    # We can't schedule the apple map partition for removal
+                    # We can't schedule the magic partition for removal
                     # because parted will not allow us to remove it from the
                     # disk. Still, we need it out of the devicetree.
                     storage.devicetree._removeDevice(part, moddisk=False)
@@ -812,6 +818,9 @@ def addPartition(disklabel, free, part_type, size):
     if not disklabel.alignment.isAligned(free, start):
         start = disklabel.alignment.alignNearest(free, start)
 
+    if disklabel.labelType == "sun" and start == 0:
+        start = disklabel.alignment.alignUp(free, start)
+
     if part_type == parted.PARTITION_LOGICAL:
         # make room for logical partition's metadata
         start += disklabel.alignment.grainSize
-- 
1.7.3.4