+#if USE_BLKID
+static PedAlignment*
+linux_get_minimum_alignment(const PedDevice *dev)
+{
+ blkid_topology tp = LINUX_SPECIFIC(dev)->topology;
+ if (!tp)
+ return NULL;
+
+ if (blkid_topology_get_minimum_io_size(tp) == 0)
+ return ped_alignment_new(
+ blkid_topology_get_alignment_offset(tp) /
+ dev->sector_size,
+ dev->phys_sector_size / dev->sector_size);
+
+ return ped_alignment_new(
+ blkid_topology_get_alignment_offset(tp) / dev->sector_size,
+ blkid_topology_get_minimum_io_size(tp) / dev->sector_size);
+}
+
+static PedAlignment*
+linux_get_optimum_alignment(const PedDevice *dev)
+{
+ blkid_topology tp = LINUX_SPECIFIC(dev)->topology;
+ if (!tp)
+ return NULL;
+
+ /* When PED_DEFAULT_ALIGNMENT is divisible by the *_io_size or
+ there are no *_io_size values, use the PED_DEFAULT_ALIGNMENT
+ If one or the other will not divide evenly, fall through to
+ previous logic. */
+ unsigned long optimal_io = blkid_topology_get_optimal_io_size(tp);
+ unsigned long minimum_io = blkid_topology_get_minimum_io_size(tp);
+ if (
+ (!optimal_io && !minimum_io)
+ || (optimal_io && PED_DEFAULT_ALIGNMENT % optimal_io == 0
+ && minimum_io && PED_DEFAULT_ALIGNMENT % minimum_io == 0)
+ || (!minimum_io && optimal_io
+ && PED_DEFAULT_ALIGNMENT % optimal_io == 0)
+ || (!optimal_io && minimum_io
+ && PED_DEFAULT_ALIGNMENT % minimum_io == 0)
+ ) {
+ /* DASD needs to use minimum alignment */
+ if (dev->type == PED_DEVICE_DASD)
+ return linux_get_minimum_alignment(dev);
+
+ return ped_alignment_new(
+ blkid_topology_get_alignment_offset(tp) / dev->sector_size,
+ PED_DEFAULT_ALIGNMENT / dev->sector_size);
+ }
+
+ /* If optimal_io_size is 0 and we don't meet the other criteria
+ for using the device.c default, return the minimum alignment. */
+ if (blkid_topology_get_optimal_io_size(tp) == 0)
+ return linux_get_minimum_alignment(dev);
+
+ return ped_alignment_new(
+ blkid_topology_get_alignment_offset(tp) / dev->sector_size,
+ blkid_topology_get_optimal_io_size(tp) / dev->sector_size);
+}
+#endif
+