2010-01-25 Colin Watson <cjwatson@ubuntu.com>

2010-01-25  Colin Watson  <cjwatson@ubuntu.com>

	* configure.ac: Check for Linux device-mapper support.
	* util/hostdisk.c (device_is_mapped): New function.
	(find_partition_start): New function, partly broken out from
	linux_find_partition and grub_util_biosdisk_get_grub_dev but with
	device-mapper support added.
	(linux_find_partition): Use find_partition_start.
	(convert_system_partition_to_system_disk): Add `st' argument.
	Support Linux /dev/mapper/* devices if device-mapper support is
	available; only DM-RAID devices are understood at present.
	(find_system_device): Add `st' argument.  Pass it to
	convert_system_partition_to_system_disk.
	(grub_util_biosdisk_get_grub_dev): Pass stat result to
	find_system_device and convert_system_partition_to_system_disk.  Use
	find_partition_start.