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import time
import logging
import json
from .partition import Partition
from .validators import valid_fs_type
from ..exceptions import DiskError
from ..general import SysCommand
from ..output import log
from ..storage import storage
GPT = 0b00000001
MBR = 0b00000010
class Filesystem:
# TODO:
# When instance of a HDD is selected, check all usages and gracefully unmount them
# as well as close any crypto handles.
def __init__(self, blockdevice, mode):
self.blockdevice = blockdevice
self.mode = mode
def __enter__(self, *args, **kwargs):
return self
def __repr__(self):
return f"Filesystem(blockdevice={self.blockdevice}, mode={self.mode})"
def __exit__(self, *args, **kwargs):
# TODO: https://stackoverflow.com/questions/28157929/how-to-safely-handle-an-exception-inside-a-context-manager
if len(args) >= 2 and args[1]:
raise args[1]
SysCommand('sync')
return True
def partuuid_to_index(self, uuid):
for i in range(10):
self.partprobe()
output = json.loads(SysCommand(f"lsblk --json -o+PARTUUID {self.blockdevice.device}").decode('UTF-8'))
for device in output['blockdevices']:
for index, partition in enumerate(device['children']):
if (partuuid := partition.get('partuuid', None)) and partuuid.lower() == uuid:
return index
time.sleep(1)
raise DiskError(f"Failed to convert PARTUUID {uuid} to a partition index number on blockdevice {self.blockdevice.device}")
def load_layout(self, layout :dict):
from ..luks import luks2
# If the layout tells us to wipe the drive, we do so
if layout.get('wipe', False):
if self.mode == GPT:
if not self.parted_mklabel(self.blockdevice.device, "gpt"):
raise KeyError(f"Could not create a GPT label on {self}")
elif self.mode == MBR:
if not self.parted_mklabel(self.blockdevice.device, "msdos"):
raise KeyError(f"Could not create a MSDOS label on {self}")
self.blockdevice.flush_cache()
# We then iterate the partitions in order
for partition in layout.get('partitions', []):
# We don't want to re-add an existing partition (those containing a UUID already)
if partition.get('format', False) and not partition.get('PARTUUID', None):
print("Adding partition....")
partition['device_instance'] = self.add_partition(partition.get('type', 'primary'),
start=partition.get('start', '1MiB'), # TODO: Revisit sane block starts (4MB for memorycards for instance)
end=partition.get('size', '100%'),
partition_format=partition.get('filesystem', {}).get('format', 'btrfs'))
# TODO: device_instance some times become None
# print('Device instance:', partition['device_instance'])
elif (partition_uuid := partition.get('PARTUUID')) and (partition_instance := self.blockdevice.get_partition(uuid=partition_uuid)):
print("Re-using partition_instance:", partition_instance)
partition['device_instance'] = partition_instance
else:
raise ValueError(f"{self}.load_layout() doesn't know how to continue without a new partition definition or a UUID ({partition.get('PARTUUID')}) on the device ({self.blockdevice.get_partition(uuid=partition_uuid)}).")
if partition.get('filesystem', {}).get('format', False):
if partition.get('encrypted', False):
if not partition.get('!password') and not storage['arguments'].get('!encryption-password'):
if storage['arguments'] == 'silent':
raise ValueError(f"Missing encryption password for {partition['device_instance']}")
else:
from ..user_interaction import get_password
partition['!password'] = get_password(f"Enter a encryption password for {partition['device_instance']}")
elif not partition.get('!password') and storage['arguments'].get('!encryption-password'):
partition['!password'] = storage['arguments']['!encryption-password']
partition['device_instance'].encrypt(password=partition['!password'])
with luks2(partition['device_instance'], storage.get('ENC_IDENTIFIER', 'ai') + 'loop', partition['!password']) as unlocked_device:
if not partition.get('format'):
if storage['arguments'] == 'silent':
raise ValueError(f"Missing fs-type to format on newly created encrypted partition {partition['device_instance']}")
else:
if not partition.get('filesystem'):
partition['filesystem'] = {}
if not partition['filesystem'].get('format', False):
while True:
partition['filesystem']['format'] = input(f"Enter a valid fs-type for newly encrypted partition {partition['filesystem']['format']}: ").strip()
if not partition['filesystem']['format'] or valid_fs_type(partition['filesystem']['format']) is False:
print("You need to enter a valid fs-type in order to continue. See `man parted` for valid fs-type's.")
continue
break
unlocked_device.format(partition['filesystem']['format'], options=partition.get('options', []))
elif partition.get('format', False):
partition['device_instance'].format(partition['filesystem']['format'], options=partition.get('options', []))
if partition.get('boot', False):
log(f"Marking partition {partition['device_instance']} as bootable.")
self.set(self.partuuid_to_index(partition['device_instance'].uuid), 'boot on')
def find_partition(self, mountpoint):
for partition in self.blockdevice:
if partition.target_mountpoint == mountpoint or partition.mountpoint == mountpoint:
return partition
def partprobe(self):
SysCommand(f'bash -c "partprobe"')
def raw_parted(self, string: str):
if (cmd_handle := SysCommand(f'/usr/bin/parted -s {string}')).exit_code != 0:
log(f"Parted ended with a bad exit code: {cmd_handle}", level=logging.ERROR, fg="red")
time.sleep(0.5)
return cmd_handle
def parted(self, string: str):
"""
Performs a parted execution of the given string
:param string: A raw string passed to /usr/bin/parted -s <string>
:type string: str
"""
if (parted_handle := self.raw_parted(string)).exit_code == 0:
self.partprobe()
return True
else:
raise DiskError(f"Parted failed to add a partition: {parted_handle}")
def use_entire_disk(self, root_filesystem_type='ext4') -> Partition:
# TODO: Implement this with declarative profiles instead.
raise ValueError("Installation().use_entire_disk() has to be re-worked.")
def add_partition(self, partition_type, start, end, partition_format=None):
log(f'Adding partition to {self.blockdevice}, {start}->{end}', level=logging.INFO)
previous_partition_uuids = {partition.uuid for partition in self.blockdevice.partitions.values()}
if self.mode == MBR:
if len(self.blockdevice.partitions) > 3:
DiskError("Too many partitions on disk, MBR disks can only have 3 parimary partitions")
if partition_format:
parted_string = f'{self.blockdevice.device} mkpart {partition_type} {partition_format} {start} {end}'
else:
parted_string = f'{self.blockdevice.device} mkpart {partition_type} {start} {end}'
if self.parted(parted_string):
count = 0
while count < 10:
new_uuid = None
new_uuid_set = (previous_partition_uuids ^ {partition.uuid for partition in self.blockdevice.partitions.values()})
if len(new_uuid_set) > 0:
new_uuid = new_uuid_set.pop()
if new_uuid:
try:
return self.blockdevice.get_partition(new_uuid)
except Exception as err:
print('Blockdevice:', self.blockdevice)
print('Partitions:', self.blockdevice.partitions)
print('Partition set:', new_uuid_set)
print('New UUID:', [new_uuid])
print('get_partition():', self.blockdevice.get_partition)
raise err
else:
count += 1
log(f"Could not get uuid for partition. Waiting for the {count} time",level=logging.DEBUG)
time.sleep(float(storage['arguments'].get('disk-sleep', 0.2)))
else:
log("Add partition exiting due to excesive wait time",level=logging.INFO)
raise DiskError(f"New partition never showed up after adding new partition on {self}.")
def set_name(self, partition: int, name: str):
return self.parted(f'{self.blockdevice.device} name {partition + 1} "{name}"') == 0
def set(self, partition: int, string: str):
log(f"Setting {string} on (parted) partition index {partition+1}", level=logging.INFO)
return self.parted(f'{self.blockdevice.device} set {partition + 1} {string}') == 0
def parted_mklabel(self, device: str, disk_label: str):
log(f"Creating a new partition labling on {device}", level=logging.INFO, fg="yellow")
# Try to unmount devices before attempting to run mklabel
try:
SysCommand(f'bash -c "umount {device}?"')
except:
pass
self.partprobe()
return self.raw_parted(f'{device} mklabel {disk_label}').exit_code == 0
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