1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
|
from __future__ import annotations
import time
import logging
import json
import pathlib
from typing import Optional, Dict, Any, TYPE_CHECKING
# https://stackoverflow.com/a/39757388/929999
if TYPE_CHECKING:
from .blockdevice import BlockDevice
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 :BlockDevice, mode :int):
self.blockdevice = blockdevice
self.mode = mode
def __enter__(self, *args :str, **kwargs :str) -> 'Filesystem':
return self
def __repr__(self) -> str:
return f"Filesystem(blockdevice={self.blockdevice}, mode={self.mode})"
def __exit__(self, *args :str, **kwargs :str) -> bool:
# 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 :str) -> Optional[int]:
for i in range(storage['DISK_RETRY_ATTEMPTS']):
self.partprobe()
time.sleep(5)
# We'll use unreliable lbslk to grab children under the /dev/<device>
output = json.loads(SysCommand(f"lsblk --json {self.blockdevice.device}").decode('UTF-8'))
for device in output['blockdevices']:
for index, partition in enumerate(device['children']):
# But we'll use blkid to reliably grab the PARTUUID for that child device (partition)
partition_uuid = SysCommand(f"blkid -s PARTUUID -o value /dev/{partition.get('name')}").decode().strip()
if partition_uuid.lower() == uuid.lower():
return index
time.sleep(storage['DISK_TIMEOUTS'])
raise DiskError(f"Failed to convert PARTUUID {uuid} to a partition index number on blockdevice {self.blockdevice.device}")
def load_layout(self, layout :Dict[str, Any]) -> None:
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):
# needed for backward compatibility with the introduction of the new "format_options"
format_options = partition.get('options',[]) + partition.get('filesystem',{}).get('format_options',[])
if partition.get('encrypted', False):
if not partition.get('!password'):
if not storage['arguments'].get('!encryption-password'):
if storage['arguments'] == 'silent':
raise ValueError(f"Missing encryption password for {partition['device_instance']}")
from ..user_interaction import get_password
storage['arguments']['!encryption-password'] = get_password(f"Enter a encryption password for {partition['device_instance']}")
partition['!password'] = storage['arguments']['!encryption-password']
if partition.get('mountpoint',None):
loopdev = f"{storage.get('ENC_IDENTIFIER', 'ai')}{pathlib.Path(partition['mountpoint']).name}loop"
else:
loopdev = f"{storage.get('ENC_IDENTIFIER', 'ai')}{pathlib.Path(partition['device_instance'].path).name}"
partition['device_instance'].encrypt(password=partition['!password'])
# Immediately unlock the encrypted device to format the inner volume
with luks2(partition['device_instance'], loopdev, partition['!password'], auto_unmount=True) 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=format_options)
elif partition.get('format', False):
partition['device_instance'].format(partition['filesystem']['format'], options=format_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 :str) -> Partition:
for partition in self.blockdevice:
if partition.target_mountpoint == mountpoint or partition.mountpoint == mountpoint:
return partition
def partprobe(self) -> bool:
return SysCommand(f'partprobe {self.blockdevice.device}').exit_code == 0
def raw_parted(self, string: str) -> SysCommand:
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) -> bool:
"""
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:
if self.partprobe():
return True
return False
else:
raise DiskError(f"Parted failed to add a partition: {parted_handle}")
def use_entire_disk(self, root_filesystem_type :str = '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 :str, start :str, end :str, partition_format :Optional[str] = None) -> 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 primary 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 is exiting due to excessive 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) -> bool:
return self.parted(f'{self.blockdevice.device} name {partition + 1} "{name}"') == 0
def set(self, partition: int, string: str) -> bool:
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) -> bool:
log(f"Creating a new partition label 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()
worked = self.raw_parted(f'{device} mklabel {disk_label}').exit_code == 0
self.partprobe()
return worked
|