def _create_mbr(self):
"""Create partitions with MBR"""
with MBR(self.image_path, self.disk_size, self.align) as part_impl:
for part_cfg in self.partitions:
part_name = part_cfg.get_name()
part_bootflag = PartitionNode.flag_boot \
in part_cfg.get_flags()
part_primary = PartitionNode.flag_primary \
in part_cfg.get_flags()
part_size = part_cfg.get_size()
part_free = part_impl.free()
part_type = part_cfg.get_type()
logger.debug("Not partitioned space [%d]", part_free)
part_size = parse_rel_size_spec(part_size, part_free)[1]
part_no \
= part_impl.add_partition(part_primary, part_bootflag,
part_size, part_type)
logger.debug("Create partition [%s] [%d]", part_name, part_no)
# We're going to mount all partitions with kpartx
# below once we're done. So the device this partition
# will be seen at becomes "/dev/mapper/loop0pX"
assert self.device_path[:5] == "/dev/"
partition_device_name = "/dev/mapper/%sp%d" % \
(self.device_path[5:], part_no)
self.state['blockdev'][part_name] \
= {'device': partition_device_name}
def create(self):
# This is a bit of a hack. Each of the partitions is actually
# in the graph, so for every partition we get a create() call
# as the walk happens. But we only need to create the
# partition table once...
if self.already_created:
logger.info("Not creating the partitions a second time.")
return
self.already_created = True
# the raw file on disk
image_path = self.state['blockdev'][self.base]['image']
# the /dev/loopX device of the parent
device_path = self.state['blockdev'][self.base]['device']
logger.info("Creating partition on [%s] [%s]", self.base, image_path)
assert self.label == 'mbr'
disk_size = self._size_of_block_dev(image_path)
with MBR(image_path, disk_size, self.align) as part_impl:
for part_cfg in self.partitions:
part_name = part_cfg.get_name()
part_bootflag = PartitionNode.flag_boot \
in part_cfg.get_flags()
part_primary = PartitionNode.flag_primary \
in part_cfg.get_flags()
part_size = part_cfg.get_size()
part_free = part_impl.free()
part_type = part_cfg.get_type()
logger.debug("Not partitioned space [%d]", part_free)
part_size = parse_rel_size_spec(part_size, part_free)[1]
part_no \
= part_impl.add_partition(part_primary, part_bootflag,
part_size, part_type)
logger.debug("Create partition [%s] [%d]", part_name, part_no)
# We're going to mount all partitions with kpartx
# below once we're done. So the device this partition
# will be seen at becomes "/dev/mapper/loop0pX"
assert device_path[:5] == "/dev/"
partition_device_name = "/dev/mapper/%sp%d" % \
(device_path[5:], part_no)
self.state['blockdev'][part_name] \
= {'device': partition_device_name}
# "saftey sync" to make sure the partitions are written
exec_sudo(["sync"])
# now all the partitions are created, get device-mapper to
# mount them
if not os.path.exists("/.dockerenv"):
exec_sudo(["kpartx", "-avs", device_path])
else:
# If running inside Docker, make our nodes manually,
# because udev will not be working. kpartx cannot run in
# sync mode in docker.
exec_sudo(["kpartx", "-av", device_path])
exec_sudo(["dmsetup", "--noudevsync", "mknodes"])
return
def _create_mbr(self):
"""Create partitions with MBR"""
with MBR(self.image_path, self.disk_size, self.align) as part_impl:
for part_cfg in self.partitions:
part_name = part_cfg.get_name()
part_bootflag = PartitionNode.flag_boot \
in part_cfg.get_flags()
part_primary = PartitionNode.flag_primary \
in part_cfg.get_flags()
part_size = part_cfg.get_size()
part_free = part_impl.free()
part_type = part_cfg.get_type()
logger.debug("Not partitioned space [%d]", part_free)
part_size = parse_rel_size_spec(part_size,
part_free)[1]
part_no \
= part_impl.add_partition(part_primary, part_bootflag,
part_size, part_type)
logger.debug("Create partition [%s] [%d]",
part_name, part_no)
# We're going to mount all partitions with kpartx
# below once we're done. So the device this partition
# will be seen at becomes "/dev/mapper/loop0pX"
assert self.device_path[:5] == "/dev/"
partition_device_name = "/dev/mapper/%sp%d" % \
(self.device_path[5:], part_no)
self.state['blockdev'][part_name] \
= {'device': partition_device_name}
def _create_gpt(self):
"""Create partitions with GPT"""
cmd = ['sgdisk', self.image_path]
# This padding gives us a little room for rounding so we don't
# go over the end of the disk
disk_free = self.disk_size - (2048 * 1024)
pnum = 1
for p in self.partitions:
args = {}
args['pnum'] = pnum
args['name'] = '%s' % p.get_name()
args['type'] = '%s' % p.get_type()
# convert from a relative/string size to bytes
size = parse_rel_size_spec(p.get_size(), disk_free)[1]
# We keep track in bytes, but specify things to sgdisk in
# megabytes so it can align on sensible boundaries. And
# create partitions right after previous so no need to
# calculate start/end - just size.
assert size <= disk_free
args['size'] = size // (1024 * 1024)
new_cmd = (
"-n",
"{pnum}:0:+{size}M".format(**args),
"-t",
"{pnum}:{type}".format(**args),
# Careful with this one, as {name} could have spaces
"-c",
"{pnum}:{name}".format(**args))
cmd.extend(new_cmd)
# Fill the state; we mount all partitions with kpartx
# below once we're done. So the device this partition
# will be seen at becomes "/dev/mapper/loop0pX"
assert self.device_path[:5] == "/dev/"
device_name = "/dev/mapper/%sp%d" % (self.device_path[5:], pnum)
self.state['blockdev'][p.get_name()] \
= {'device': device_name}
disk_free = disk_free - size
pnum = pnum + 1
logger.debug("Partition %s added, %s remaining in disk", pnum,
disk_free)
logger.debug("cmd: %s", ' '.join(cmd))
exec_sudo(cmd)
def _create_gpt(self):
"""Create partitions with GPT"""
cmd = ['sgdisk', self.image_path]
# This padding gives us a little room for rounding so we don't
# go over the end of the disk
disk_free = self.disk_size - (2048 * 1024)
pnum = 1
for p in self.partitions:
args = {}
args['pnum'] = pnum
args['name'] = '%s' % p.get_name()
args['type'] = '%s' % p.get_type()
# convert from a relative/string size to bytes
size = parse_rel_size_spec(p.get_size(), disk_free)[1]
# We keep track in bytes, but specify things to sgdisk in
# megabytes so it can align on sensible boundaries. And
# create partitions right after previous so no need to
# calculate start/end - just size.
assert size <= disk_free
args['size'] = size // (1024 * 1024)
new_cmd = ("-n", "{pnum}:0:+{size}M".format(**args),
"-t", "{pnum}:{type}".format(**args),
# Careful with this one, as {name} could have spaces
"-c", "{pnum}:{name}".format(**args))
cmd.extend(new_cmd)
# Fill the state; we mount all partitions with kpartx
# below once we're done. So the device this partition
# will be seen at becomes "/dev/mapper/loop0pX"
assert self.device_path[:5] == "/dev/"
device_name = "/dev/mapper/%sp%d" % (self.device_path[5:], pnum)
self.state['blockdev'][p.get_name()] \
= {'device': device_name}
disk_free = disk_free - size
pnum = pnum + 1
logger.debug("Partition %s added, %s remaining in disk",
pnum, disk_free)
logger.debug("cmd: %s", ' '.join(cmd))
exec_sudo(cmd)
def create(self, state, rollback):
# not this is NOT a node and this is not called directly! The
# create() calls in the partition nodes this plugin has
# created are calling back into this.
image_path = state['blockdev'][self.base]['image']
device_path = state['blockdev'][self.base]['device']
logger.info("Creating partition on [%s] [%s]", self.base, image_path)
# This is a bit of a hack. Each of the partitions is actually
# in the graph, so for every partition we get a create() call
# as the walk happens. But we only need to create the
# partition table once...
if self.already_created:
logger.info("Not creating the partitions a second time.")
return
assert self.label == 'mbr'
partition_devices = set()
disk_size = self._size_of_block_dev(image_path)
with MBR(image_path, disk_size, self.align) as part_impl:
for part_cfg in self.partitions:
part_name = part_cfg.get_name()
part_bootflag = PartitionNode.flag_boot \
in part_cfg.get_flags()
part_primary = PartitionNode.flag_primary \
in part_cfg.get_flags()
part_size = part_cfg.get_size()
part_free = part_impl.free()
part_type = part_cfg.get_type()
logger.debug("Not partitioned space [%d]", part_free)
part_size = parse_rel_size_spec(part_size,
part_free)[1]
part_no \
= part_impl.add_partition(part_primary, part_bootflag,
part_size, part_type)
logger.debug("Create partition [%s] [%d]",
part_name, part_no)
partition_device_name = device_path + "p%d" % part_no
state['blockdev'][part_name] \
= {'device': partition_device_name}
partition_devices.add(partition_device_name)
self.already_created = True
self._notify_os_of_partition_changes(device_path, partition_devices)
return
def create(self, result, rollback):
image_path = result['blockdev'][self.base]['image']
device_path = result['blockdev'][self.base]['device']
logger.info("Creating partition on [%s] [%s]" %
(self.base, image_path))
if self.already_created:
logger.info("Not creating the partitions a second time.")
return
assert self.label == 'mbr'
partition_devices = set()
disk_size = self._size_of_block_dev(image_path)
with MBR(image_path, disk_size, self.align) as part_impl:
for part_cfg in self.partitions:
part_name = part_cfg.get_name()
part_bootflag = Partitioning.flag_boot \
in part_cfg.get_flags()
part_primary = Partitioning.flag_primary \
in part_cfg.get_flags()
part_size = part_cfg.get_size()
part_free = part_impl.free()
part_type = part_cfg.get_type()
logger.debug("Not partitioned space [%d]" % part_free)
part_size = parse_rel_size_spec(part_size, part_free)[1]
part_no \
= part_impl.add_partition(part_primary, part_bootflag,
part_size, part_type)
logger.debug("Create partition [%s] [%d]" %
(part_name, part_no))
partition_device_name = device_path + "p%d" % part_no
result['blockdev'][part_name] \
= {'device': partition_device_name}
partition_devices.add(partition_device_name)
self.already_created = True
self._notify_os_of_partition_changes(device_path, partition_devices)
return
def test_parse_rel_size_with_abs(self):
"""Calls parse_rel_size_spec with an absolute number"""
is_rel, size = parse_rel_size_spec("154MiB", 0)
self.assertFalse(is_rel)
self.assertEqual(154 * 1024 * 1024, size)
