import glob import pathlib import time import logging import json import os import hashlib from typing import Optional from .blockdevice import BlockDevice from .helpers import get_mount_info, get_filesystem_type from ..storage import storage from ..exceptions import DiskError, SysCallError, UnknownFilesystemFormat from ..output import log from ..general import SysCommand class Partition: def __init__(self, path: str, block_device: BlockDevice, part_id=None, size=-1, filesystem=None, mountpoint=None, encrypted=False, autodetect_filesystem=True): if not part_id: part_id = os.path.basename(path) self.block_device = block_device self.path = path self.part_id = part_id self.mountpoint = mountpoint self.target_mountpoint = mountpoint self.filesystem = filesystem self.size = size # TODO: Refresh? self._encrypted = None self.encrypted = encrypted self.allow_formatting = False if mountpoint: self.mount(mountpoint) try: mount_information = get_mount_info(self.path) except DiskError: mount_information = {} if self.mountpoint != mount_information.get('target', None) and mountpoint: raise DiskError(f"{self} was given a mountpoint but the actual mountpoint differs: {mount_information.get('target', None)}") if target := mount_information.get('target', None): self.mountpoint = target if not self.filesystem and autodetect_filesystem: if fstype := mount_information.get('fstype', get_filesystem_type(path)): self.filesystem = fstype if self.filesystem == 'crypto_LUKS': self.encrypted = True def __lt__(self, left_comparitor): if type(left_comparitor) == Partition: left_comparitor = left_comparitor.path else: left_comparitor = str(left_comparitor) return self.path < left_comparitor # Not quite sure the order here is correct. But /dev/nvme0n1p1 comes before /dev/nvme0n1p5 so seems correct. def __repr__(self, *args, **kwargs): mount_repr = '' if self.mountpoint: mount_repr = f", mounted={self.mountpoint}" elif self.target_mountpoint: mount_repr = f", rel_mountpoint={self.target_mountpoint}" if self._encrypted: return f'Partition(path={self.path}, size={self.size}, PARTUUID={self._safe_uuid}, parent={self.real_device}, fs={self.filesystem}{mount_repr})' else: return f'Partition(path={self.path}, size={self.size}, PARTUUID={self._safe_uuid}, fs={self.filesystem}{mount_repr})' def __dump__(self): return { 'type' : 'primary', 'PARTUUID' : self._safe_uuid, 'wipe' : self.allow_formatting, 'boot' : self.boot, 'ESP' : self.boot, 'mountpoint' : self.target_mountpoint, 'encrypted' : self._encrypted, 'start' : self.start, 'size' : self.end, 'filesystem' : { 'format' : get_filesystem_type(self.path) } } @property def sector_size(self): output = json.loads(SysCommand(f"lsblk --json -o+LOG-SEC {self.path}").decode('UTF-8')) for device in output['blockdevices']: return device.get('log-sec', None) @property def start(self): output = json.loads(SysCommand(f"sfdisk --json {self.block_device.path}").decode('UTF-8')) for partition in output.get('partitiontable', {}).get('partitions', []): if partition['node'] == self.path: return partition['start']# * self.sector_size @property def end(self): # TODO: Verify that the logic holds up, that 'size' is the size without 'start' added to it. output = json.loads(SysCommand(f"sfdisk --json {self.block_device.path}").decode('UTF-8')) for partition in output.get('partitiontable', {}).get('partitions', []): if partition['node'] == self.path: return partition['size']# * self.sector_size @property def boot(self): output = json.loads(SysCommand(f"sfdisk --json {self.block_device.path}").decode('UTF-8')) # Get the bootable flag from the sfdisk output: # { # "partitiontable": { # "label":"dos", # "id":"0xd202c10a", # "device":"/dev/loop0", # "unit":"sectors", # "sectorsize":512, # "partitions": [ # {"node":"/dev/loop0p1", "start":2048, "size":10483712, "type":"83", "bootable":true} # ] # } # } for partition in output.get('partitiontable', {}).get('partitions', []): if partition['node'] == self.path: return partition.get('bootable', False) return False @property def partition_type(self): lsblk = json.loads(SysCommand(f"lsblk --json -o+PTTYPE {self.path}").decode('UTF-8')) for device in lsblk['blockdevices']: return device['pttype'] @property def uuid(self) -> Optional[str]: """ Returns the PARTUUID 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 i in range(storage['DISK_RETRY_ATTEMPTS']): self.partprobe() partuuid_struct = SysCommand(f'lsblk -J -o+PARTUUID {self.path}') if partuuid_struct.exit_code == 0: if partition_information := next(iter(json.loads(partuuid_struct.decode('UTF-8'))['blockdevices']), None): if (partuuid := partition_information.get('partuuid', None)): return partuuid time.sleep(storage['DISK_TIMEOUTS']) raise DiskError(f"Could not get PARTUUID for {self.path} using 'lsblk -J -o+PARTUUID {self.path}'") @property def _safe_uuid(self) -> Optional[str]: """ A near copy of self.uuid but without any delays. This function should only be used where uuid is not crucial. For instance when you want to get a __repr__ of the class. """ self.partprobe() partuuid_struct = SysCommand(f'lsblk -J -o+PARTUUID {self.path}') if partuuid_struct.exit_code == 0: if partition_information := next(iter(json.loads(partuuid_struct.decode('UTF-8'))['blockdevices']), None): if (partuuid := partition_information.get('partuuid', None)): return partuuid @property def encrypted(self): return self._encrypted @encrypted.setter def encrypted(self, value: bool): self._encrypted = value @property def parent(self): return self.real_device @property def real_device(self): for blockdevice in json.loads(SysCommand('lsblk -J').decode('UTF-8'))['blockdevices']: if parent := self.find_parent_of(blockdevice, os.path.basename(self.path)): return f"/dev/{parent}" # raise DiskError(f'Could not find appropriate parent for encrypted partition {self}') return self.path def partprobe(self): SysCommand(f'bash -c "partprobe"') def detect_inner_filesystem(self, password): log(f'Trying to detect inner filesystem format on {self} (This might take a while)', level=logging.INFO) from ..luks import luks2 try: with luks2(self, storage.get('ENC_IDENTIFIER', 'ai') + 'loop', password, auto_unmount=True) as unlocked_device: return unlocked_device.filesystem except SysCallError: return None def has_content(self): fs_type = get_filesystem_type(self.path) if not fs_type or "swap" in fs_type: return False temporary_mountpoint = '/tmp/' + hashlib.md5(bytes(f"{time.time()}", 'UTF-8') + os.urandom(12)).hexdigest() temporary_path = pathlib.Path(temporary_mountpoint) temporary_path.mkdir(parents=True, exist_ok=True) if (handle := SysCommand(f'/usr/bin/mount {self.path} {temporary_mountpoint}')).exit_code != 0: raise DiskError(f'Could not mount and check for content on {self.path} because: {b"".join(handle)}') files = len(glob.glob(f"{temporary_mountpoint}/*")) iterations = 0 while SysCommand(f"/usr/bin/umount -R {temporary_mountpoint}").exit_code != 0 and (iterations := iterations + 1) < 10: time.sleep(1) temporary_path.rmdir() return True if files > 0 else False def encrypt(self, *args, **kwargs): """ A wrapper function for luks2() instances and the .encrypt() method of that instance. """ from ..luks import luks2 handle = luks2(self, None, None) return handle.encrypt(self, *args, **kwargs) def format(self, filesystem=None, path=None, log_formatting=True, options=[]): """ Format can be given an overriding path, for instance /dev/null to test the formatting functionality and in essence the support for the given filesystem. """ if filesystem is None: filesystem = self.filesystem if path is None: path = self.path # To avoid "unable to open /dev/x: No such file or directory" start_wait = time.time() while pathlib.Path(path).exists() is False and time.time() - start_wait < 10: time.sleep(0.025) if log_formatting: log(f'Formatting {path} -> {filesystem}', level=logging.INFO) if filesystem == 'btrfs': options = ['-f'] + options if 'UUID:' not in (mkfs := SysCommand(f"/usr/bin/mkfs.btrfs {' '.join(options)} {path}").decode('UTF-8')): raise DiskError(f'Could not format {path} with {filesystem} because: {mkfs}') self.filesystem = filesystem elif filesystem == 'fat32': options = ['-F32'] + options mkfs = SysCommand(f"/usr/bin/mkfs.vfat {' '.join(options)} {path}").decode('UTF-8') if ('mkfs.fat' not in mkfs and 'mkfs.vfat' not in mkfs) or 'command not found' in mkfs: raise DiskError(f"Could not format {path} with {filesystem} because: {mkfs}") self.filesystem = filesystem elif filesystem == 'ext4': options = ['-F'] + options if (handle := SysCommand(f"/usr/bin/mkfs.ext4 {' '.join(options)} {path}")).exit_code != 0: raise DiskError(f"Could not format {path} with {filesystem} because: {handle.decode('UTF-8')}") self.filesystem = filesystem elif filesystem == 'ext2': options = ['-F'] + options if (handle := SysCommand(f"/usr/bin/mkfs.ext2 {' '.join(options)} {path}")).exit_code != 0: raise DiskError(f'Could not format {path} with {filesystem} because: {b"".join(handle)}') self.filesystem = 'ext2' elif filesystem == 'xfs': options = ['-f'] + options if (handle := SysCommand(f"/usr/bin/mkfs.xfs {' '.join(options)} {path}")).exit_code != 0: raise DiskError(f"Could not format {path} with {filesystem} because: {handle.decode('UTF-8')}") self.filesystem = filesystem elif filesystem == 'f2fs': options = ['-f'] + options if (handle := SysCommand(f"/usr/bin/mkfs.f2fs {' '.join(options)} {path}")).exit_code != 0: raise DiskError(f"Could not format {path} with {filesystem} because: {handle.decode('UTF-8')}") self.filesystem = filesystem elif filesystem == 'crypto_LUKS': # from ..luks import luks2 # encrypted_partition = luks2(self, None, None) # encrypted_partition.format(path) self.filesystem = filesystem else: raise UnknownFilesystemFormat(f"Fileformat '{filesystem}' is not yet implemented.") if get_filesystem_type(path) == 'crypto_LUKS' or get_filesystem_type(self.real_device) == 'crypto_LUKS': self.encrypted = True else: self.encrypted = False return True def find_parent_of(self, data, name, parent=None): if data['name'] == name: return parent elif 'children' in data: for child in data['children']: if parent := self.find_parent_of(child, name, parent=data['name']): return parent def mount(self, target, fs=None, options=''): if not self.mountpoint: log(f'Mounting {self} to {target}', level=logging.INFO) if not fs: if not self.filesystem: raise DiskError(f'Need to format (or define) the filesystem on {self} before mounting.') fs = self.filesystem pathlib.Path(target).mkdir(parents=True, exist_ok=True) try: if options: mnt_handle = SysCommand(f"/usr/bin/mount -o {options} {self.path} {target}") else: mnt_handle = SysCommand(f"/usr/bin/mount {self.path} {target}") # TODO: Should be redundant to check for exit_code if mnt_handle.exit_code != 0: raise DiskError(f"Could not mount {self.path} to {target} using options {options}") except SysCallError as err: raise err self.mountpoint = target return True def unmount(self): try: SysCommand(f"/usr/bin/umount {self.path}") except SysCallError as err: exit_code = err.exit_code # Without to much research, it seams that low error codes are errors. # And above 8k is indicators such as "/dev/x not mounted.". # So anything in between 0 and 8k are errors (?). if 0 < exit_code < 8000: raise err self.mountpoint = None return True def umount(self): return self.unmount() def filesystem_supported(self): """ The support for a filesystem (this partition) is tested by calling partition.format() with a path set to '/dev/null' which returns two exceptions: 1. SysCallError saying that /dev/null is not formattable - but the filesystem is supported 2. UnknownFilesystemFormat that indicates that we don't support the given filesystem type """ try: self.format(self.filesystem, '/dev/null', log_formatting=False, allow_formatting=True) except (SysCallError, DiskError): pass # We supported it, but /dev/null is not formatable as expected so the mkfs call exited with an error code except UnknownFilesystemFormat as err: raise err return True