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path: root/archinstall/lib/disk/blockdevice.py
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-rw-r--r--archinstall/lib/disk/blockdevice.py207
1 files changed, 207 insertions, 0 deletions
diff --git a/archinstall/lib/disk/blockdevice.py b/archinstall/lib/disk/blockdevice.py
new file mode 100644
index 00000000..e2fcdae5
--- /dev/null
+++ b/archinstall/lib/disk/blockdevice.py
@@ -0,0 +1,207 @@
+from ..output import log
+
+class BlockDevice:
+ def __init__(self, path, info=None):
+ if not info:
+ # If we don't give any information, we need to auto-fill it.
+ # Otherwise any subsequent usage will break.
+ info = all_disks()[path].info
+
+ self.path = path
+ self.info = info
+ self.keep_partitions = True
+ self.part_cache = {}
+
+ # TODO: Currently disk encryption is a BIT misleading.
+ # It's actually partition-encryption, but for future-proofing this
+ # I'm placing the encryption password on a BlockDevice level.
+
+ def __repr__(self, *args, **kwargs):
+ return f"BlockDevice({self.device}, size={self.size}GB, free_space={'+'.join(part[2] for part in self.free_space)}, bus_type={self.bus_type})"
+
+ def __iter__(self):
+ for partition in self.partitions:
+ yield self.partitions[partition]
+
+ def __getitem__(self, key, *args, **kwargs):
+ if key not in self.info:
+ raise KeyError(f'{self} does not contain information: "{key}"')
+ return self.info[key]
+
+ def __len__(self):
+ return len(self.partitions)
+
+ def __lt__(self, left_comparitor):
+ return self.path < left_comparitor.path
+
+ def json(self):
+ """
+ json() has precedence over __dump__, so this is a way
+ to give less/partial information for user readability.
+ """
+ return self.path
+
+ def __dump__(self):
+ return {
+ self.path : {
+ 'partuuid' : self.uuid,
+ 'wipe' : self.info.get('wipe', None),
+ 'partitions' : [part.__dump__() for part in self.partitions.values()]
+ }
+ }
+
+ @property
+ def partition_type(self):
+ output = json.loads(SysCommand(f"lsblk --json -o+PTTYPE {self.path}").decode('UTF-8'))
+
+ for device in output['blockdevices']:
+ return device['pttype']
+
+ @property
+ def device(self):
+ """
+ Returns the actual device-endpoint of the BlockDevice.
+ If it's a loop-back-device it returns the back-file,
+ If it's a ATA-drive it returns the /dev/X device
+ And if it's a crypto-device it returns the parent device
+ """
+ if "type" not in self.info:
+ raise DiskError(f'Could not locate backplane info for "{self.path}"')
+
+ if self.info['type'] == 'loop':
+ for drive in json.loads(SysCommand(['losetup', '--json']).decode('UTF_8'))['loopdevices']:
+ if not drive['name'] == self.path:
+ continue
+
+ return drive['back-file']
+ elif self.info['type'] == 'disk':
+ return self.path
+ elif self.info['type'][:4] == 'raid':
+ # This should catch /dev/md## raid devices
+ return self.path
+ elif self.info['type'] == 'crypt':
+ if 'pkname' not in self.info:
+ raise DiskError(f'A crypt device ({self.path}) without a parent kernel device name.')
+ return f"/dev/{self.info['pkname']}"
+ else:
+ log(f"Unknown blockdevice type for {self.path}: {self.info['type']}", level=logging.DEBUG)
+
+ # if not stat.S_ISBLK(os.stat(full_path).st_mode):
+ # raise DiskError(f'Selected disk "{full_path}" is not a block device.')
+
+ @property
+ def partitions(self):
+ SysCommand(['partprobe', self.path])
+
+ result = SysCommand(['/usr/bin/lsblk', '-J', self.path])
+
+ if b'not a block device' in result:
+ raise DiskError(f'Can not read partitions off something that isn\'t a block device: {self.path}')
+
+ if not result[:1] == b'{':
+ raise DiskError('Error getting JSON output from:', f'/usr/bin/lsblk -J {self.path}')
+
+ r = json.loads(result.decode('UTF-8'))
+ if len(r['blockdevices']) and 'children' in r['blockdevices'][0]:
+ root_path = f"/dev/{r['blockdevices'][0]['name']}"
+ for part in r['blockdevices'][0]['children']:
+ part_id = part['name'][len(os.path.basename(self.path)):]
+ if part_id not in self.part_cache:
+ # TODO: Force over-write even if in cache?
+ if part_id not in self.part_cache or self.part_cache[part_id].size != part['size']:
+ self.part_cache[part_id] = Partition(root_path + part_id, self, part_id=part_id, size=part['size'])
+
+ return {k: self.part_cache[k] for k in sorted(self.part_cache)}
+
+ @property
+ def partition(self):
+ all_partitions = self.partitions
+ return [all_partitions[k] for k in all_partitions]
+
+ @property
+ def partition_table_type(self):
+ return GPT
+
+ @property
+ def uuid(self):
+ log('BlockDevice().uuid is untested!', level=logging.WARNING, fg='yellow')
+ """
+ Returns the disk UUID as returned by lsblk.
+ This is more reliable than relying on /dev/disk/by-partuuid as
+ it doesn't seam to be able to detect md raid partitions.
+ """
+ for partition in json.loads(SysCommand(f'lsblk -J -o+UUID {self.path}').decode('UTF-8'))['blockdevices']:
+ return partition.get('uuid', None)
+
+ def convert_size_to_gb(self, size):
+ units = {
+ 'P' : lambda s : float(s) * 2048,
+ 'T' : lambda s : float(s) * 1024,
+ 'G' : lambda s : float(s),
+ 'M' : lambda s : float(s) / 1024,
+ 'K' : lambda s : float(s) / 2048,
+ 'B' : lambda s : float(s) / 3072,
+ }
+ unit = size[-1]
+ return float(units.get(unit, lambda s : None)(size[:-1]))
+
+ @property
+ def size(self):
+ output = json.loads(SysCommand(f"lsblk --json -o+SIZE {self.path}").decode('UTF-8'))
+
+ for device in output['blockdevices']:
+ return self.convert_size_to_gb(device['size'])
+
+ @property
+ def bus_type(self):
+ output = json.loads(SysCommand(f"lsblk --json -o+ROTA,TRAN {self.path}").decode('UTF-8'))
+
+ for device in output['blockdevices']:
+ return device['tran']
+
+ @property
+ def spinning(self):
+ output = json.loads(SysCommand(f"lsblk --json -o+ROTA,TRAN {self.path}").decode('UTF-8'))
+
+ for device in output['blockdevices']:
+ return device['rota'] is True
+
+ @property
+ def free_space(self):
+ # NOTE: parted -s will default to `cancel` on prompt, skipping any partition
+ # that is "outside" the disk. in /dev/sr0 this is usually the case with Archiso,
+ # so the free will ignore the ESP partition and just give the "free" space.
+ # Doesn't harm us, but worth noting in case something weird happens.
+ for line in SysCommand(f"parted -s --machine {self.path} print free"):
+ if 'free' in (free_space := line.decode('UTF-8')):
+ _, start, end, size, *_ = free_space.strip('\r\n;').split(':')
+ yield (start, end, size)
+
+ @property
+ def largest_free_space(self):
+ info = None
+ for space_info in self.free_space:
+ if not info:
+ info = space_info
+ else:
+ # [-1] = size
+ if space_info[-1] > info[-1]:
+ info = space_info
+ return info
+
+ def has_partitions(self):
+ return len(self.partitions)
+
+ def has_mount_point(self, mountpoint):
+ for partition in self.partitions:
+ if self.partitions[partition].mountpoint == mountpoint:
+ return True
+ return False
+
+ def flush_cache(self):
+ self.part_cache = {}
+
+ def get_partition(self, uuid):
+ for partition in self:
+ if partition.uuid == uuid:
+ return partition \ No newline at end of file