- self.g = guestfs.GuestFS()
- self.g.add_drive_opts(self.device, readonly=0)
-
- #self.g.set_trace(1)
- #self.g.set_verbose(1)
-
- self.guestfs_enabled = False
-
- def enable(self):
- """Enable a newly created DiskDevice"""
-
- self.progressbar = progress_generator()
- self.progressbar.next()
- eh = self.g.set_event_callback(self.progress_callback, guestfs.EVENT_PROGRESS)
- self.g.launch()
- self.guestfs_enabled = True
- self.g.delete_event_callback(eh)
- if self.progressbar is not None:
- self.progressbar.send(100)
- self.progressbar = None
-
- roots = self.g.inspect_os()
- if len(roots) == 0:
- raise DiskError("No operating system found")
- if len(roots) > 1:
- raise DiskError("Multiple operating systems found")
-
- self.root = roots[0]
- self.ostype = self.g.inspect_get_type(self.root)
- self.distro = self.g.inspect_get_distro(self.root)
-
- def destroy(self):
- """Destroy this DiskDevice instance."""
-
- if self.guestfs_enabled:
- self.g.umount_all()
- self.g.sync()
-
- # Close the guestfs handler if open
- self.g.close()
-
- def progress_callback(self, ev, eh, buf, array):
- position = array[2]
- total = array[3]
-
- assert self.progress_bar is not None
-
- self.progress_bar.send((position * 100)//total)
-
- if position == total:
- self.progress_bar = None
-
- def mount(self):
- """Mount all disk partitions in a correct order."""
- mps = self.g.inspect_get_mountpoints(self.root)
-
- # Sort the keys to mount the fs in a correct order.
- # / should be mounted befor /boot, etc
- def compare(a, b):
- if len(a[0]) > len(b[0]):
- return 1
- elif len(a[0]) == len(b[0]):
- return 0
- else:
- return -1
- mps.sort(compare)
- for mp, dev in mps:
- try:
- self.g.mount(dev, mp)
- except RuntimeError as msg:
- print "%s (ignored)" % msg
-
- def umount(self):
- """Umount all mounted filesystems."""
- self.g.umount_all()
-
- def shrink(self):
- """Shrink the disk.
-
- This is accomplished by shrinking the last filesystem in the
- disk and then updating the partition table. The new disk size
- (in bytes) is returned.
- """
- dev = self.g.part_to_dev(self.root)
- parttype = self.g.part_get_parttype(dev)
- if parttype != 'msdos':
- raise DiskError("You have a %s partition table. "
- "Only msdos partitions are supported" % parttype)
-
- last_partition = self.g.part_list(dev)[-1]
-
- if last_partition['part_num'] > 4:
- raise DiskError("This disk contains logical partitions. "
- "Only primary partitions are supported.")
-
- part_dev = "%s%d" % (dev, last_partition['part_num'])
- fs_type = self.g.vfs_type(part_dev)
- if not re.match("ext[234]", fs_type):
- print "Warning: Don't know how to resize %s partitions." % vfs_type
- return
-
- self.g.e2fsck_f(part_dev)
- self.g.resize2fs_M(part_dev)
- output = self.g.tune2fs_l(part_dev)
- block_size = int(filter(lambda x: x[0] == 'Block size', output)[0][1])
- block_cnt = int(filter(lambda x: x[0] == 'Block count', output)[0][1])
-
- sector_size = self.g.blockdev_getss(dev)
-
- start = last_partition['part_start'] / sector_size
- end = start + (block_size * block_cnt) / sector_size - 1
-
- self.g.part_del(dev, last_partition['part_num'])
- self.g.part_add(dev, 'p', start, end)
-
- return (end + 1) * sector_size
-
- def size(self):
- """Returns the "payload" size of the device.
-
- The size returned by this method is the size of the space occupied by
- the partitions (including the space before the first partition).