soooo...
turns out ALL of the disk operations can be performed with gobject-introspection. BUT it's unlikely that that'll be available everywhere, or that the Arch Linux releng team would include it, etc. So we have fallbacks to mimic it. BUT please try to use gobject-introspection with libblockdev, because it's going to be a lot faster and a lot less error-prone.
This commit is contained in:
brent s
parent
9e5ff48926
commit
ca1f12f5bd
@ -1,5 +1,23 @@
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try:
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from . import block
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from . import block
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from . import filesystem
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except ImportError:
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from . import luks
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from . import block_fallback as block
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from . import lvm
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try:
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from . import mdadm
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from . import filesystem_fallback
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except ImportError:
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from . import filesystem_fallback as filesystem
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try:
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from . import luks_fallback
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except ImportError:
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from . import luks_fallback as luks
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try:
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from . import lvm_fallback
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except ImportError:
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from . import lvm_fallback as lvm
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try:
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from . import mdadm_fallback
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except ImportError:
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from . import mdadm_fallback as mdadm
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9
aif/disk/_common.py
Normal file
9
aif/disk/_common.py
Normal file
@ -0,0 +1,9 @@
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import gi
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gi.require_version('BlockDev', '2.0')
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from gi.repository import BlockDev, GLib
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ps = BlockDev.PluginSpec()
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ps.name = BlockDev.Plugin.LVM
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ps.so_name = "libbd_lvm.so"
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BlockDev.init([ps])
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@ -1,225 +1,3 @@
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# To reproduce sgdisk behaviour in v1 of AIF-NG:
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from . import _common
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# https://gist.github.com/herry13/5931cac426da99820de843477e41e89e
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# https://github.com/dcantrell/pyparted/blob/master/examples/query_device_capacity.py
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# TODO: Remember to replicate genfstab behaviour.
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import os
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BlockDev = _common.BlockDev
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import re
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import subprocess
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try:
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# https://stackoverflow.com/a/34812552/733214
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# https://github.com/karelzak/util-linux/blob/master/libmount/python/test_mount_context.py#L6
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import libmount as mount
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except ImportError:
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# We should never get here. util-linux is part of core (base) in Arch and uses "libmount".
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import pylibmount as mount
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##
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import blkinfo
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import parted # https://www.gnu.org/software/parted/api/index.html
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import psutil
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##
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from aif.utils import xmlBool, size
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# TODO: https://serverfault.com/questions/356534/ssd-erase-block-size-lvm-pv-on-raw-device-alignment
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PARTED_FSTYPES = sorted(list(dict(vars(parted.filesystem))['fileSystemType'].keys()))
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PARTED_FLAGS = sorted(list(parted.partition.partitionFlag.values()))
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IDX_FLAG = dict(parted.partition.partitionFlag)
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FLAG_IDX = {v: k for k, v in IDX_FLAG.items()}
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# parted lib can do SI or IEC. So can we.
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_pos_re = re.compile((r'^(?P<pos_or_neg>-|\+)?\s*'
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r'(?P<size>[0-9]+)\s*'
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# empty means size in sectors
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r'(?P<pct_unit_or_sct>%|{0}|)\s*$'.format('|'.join(size.valid_storage))
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))
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def convertSizeUnit(pos):
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orig_pos = pos
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pos = _pos_re.search(pos)
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if pos:
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pos_or_neg = (pos.group('pos_or_neg') if pos.group('pos_or_neg') else None)
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if pos_or_neg == '+':
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from_beginning = True
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elif pos_or_neg == '-':
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from_beginning = False
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else:
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from_beginning = pos_or_neg
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_size = int(pos.group('size'))
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amt_type = pos.group('pct_unit_or_sct').strip()
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else:
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raise ValueError('Invalid size specified: {0}'.format(orig_pos))
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return((from_beginning, _size, amt_type))
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class Partition(object):
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def __init__(self, part_xml, diskobj, start_sector, partnum, tbltype, part_type = None):
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if tbltype not in ('gpt', 'msdos'):
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raise ValueError('{0} must be one of gpt or msdos'.format(tbltype))
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if tbltype == 'msdos' and part_type not in ('primary', 'extended', 'logical'):
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raise ValueError(('You must specify if this is a '
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'primary, extended, or logical partition for msdos partition tables'))
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self.xml = part_xml
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self.id = part_xml.attrib['id']
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self.flags = set()
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for f in self.xml.findall('partitionFlag'):
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if f.text in PARTED_FLAGS:
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self.flags.add(f.text)
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self.flags = sorted(list(self.flags))
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self.partnum = partnum
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if tbltype == 'msdos':
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if partnum > 4:
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self.part_type = parted.PARTITION_LOGICAL
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else:
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if part_type == 'extended':
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self.part_type = parted.PARTITION_EXTENDED
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elif part_type == 'logical':
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self.part_type = parted.PARTITION_LOGICAL
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else:
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self.part_type = parted.PARTITION_NORMAL
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self.fstype = self.xml.attrib['fsType'].lower()
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if self.fstype not in PARTED_FSTYPES:
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raise ValueError(('{0} is not a valid partition filesystem type; '
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'must be one of: {1}').format(self.xml.attrib['fsType'],
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', '.join(sorted(PARTED_FSTYPES))))
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self.disk = diskobj
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self.device = self.disk.device
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self.devpath = '{0}{1}'.format(self.device.path, partnum)
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self.is_hiformatted = False
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sizes = {}
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for s in ('start', 'stop'):
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x = dict(zip(('from_bgn', 'size', 'type'),
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convertSizeUnit(self.xml.attrib[s])))
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sectors = x['size']
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if x['type'] == '%':
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sectors = int(self.device.getLength() / x['size'])
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else:
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sectors = int(size.convertStorage(x['size'], x['type'], target = 'B') / self.device.sectorSize)
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sizes[s] = (sectors, x['from_bgn'])
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if sizes['start'][1] is not None:
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if sizes['start'][1]:
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self.begin = sizes['start'][0] + 0
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else:
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self.begin = self.device.getLength() - sizes['start'][0]
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else:
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self.begin = sizes['start'][0] + start_sector
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if sizes['stop'][1] is not None:
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if sizes['stop'][1]:
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self.end = sizes['stop'][0] + 0
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else:
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# This *technically* should be - 34, at least for gpt, but the alignment optimizer fixes it for us.
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self.end = (self.device.getLength() - 1) - sizes['stop'][0]
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else:
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self.end = self.begin + sizes['stop'][0]
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# TECHNICALLY we could craft the Geometry object with "length = ...", but it doesn't let us be explicit
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# in configs. So we manually crunch the numbers and do it all at the end.
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self.geometry = parted.Geometry(device = self.device,
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start = self.begin,
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end = self.end)
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self.filesystem = parted.FileSystem(type = self.fstype,
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geometry = self.geometry)
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self.partition = parted.Partition(disk = diskobj,
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type = self.part_type,
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geometry = self.geometry,
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fs = self.filesystem)
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for f in self.flags[:]:
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flag_id = FLAG_IDX[f]
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if self.partition.isFlagAvailable(flag_id):
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self.partition.setFlag(flag_id)
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else:
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self.flags.remove(f)
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if tbltype == 'gpt' and self.xml.attrib.get('name'):
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# The name attribute setting is b0rk3n, so we operate on the underlying PedPartition object.
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# https://github.com/dcantrell/pyparted/issues/49#issuecomment-540096687
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# https://github.com/dcantrell/pyparted/issues/65
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# self.partition.name = self.xml.attrib.get('name')
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_pedpart = self.partition.getPedPartition()
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_pedpart.set_name(self.xml.attrib.get('name'))
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def detect(self):
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pass
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class Disk(object):
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def __init__(self, disk_xml):
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self.xml = disk_xml
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self.devpath = self.xml.attrib['device']
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self._initDisk()
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def _initDisk(self):
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self.tabletype = self.xml.attrib.get('diskFormat', 'gpt').lower()
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if self.tabletype in ('bios', 'mbr', 'dos'):
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self.tabletype = 'msdos'
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validlabels = parted.getLabels()
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if self.tabletype not in validlabels:
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raise ValueError(('Disk format {0} is not valid for this architecture;'
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'must be one of: {1}'.format(self.tabletype, ', '.join(list(validlabels)))))
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self.device = parted.getDevice(self.devpath)
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self.disk = parted.freshDisk(self.device, self.tabletype)
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self.is_lowformatted = False
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self.is_hiformatted = False
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self.is_partitioned = False
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self.partitions = []
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return()
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def diskFormat(self):
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if self.is_lowformatted:
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return()
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# This is a safeguard. We do *not* want to low-format a disk that is mounted.
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for p in psutil.disk_partitions(all = True):
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if self.devpath in p:
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raise RuntimeError('{0} is mounted; we are cowardly refusing to low-format it'.format(self.devpath))
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self.disk.deleteAllPartitions()
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self.disk.commit()
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self.is_lowformatted = True
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self.is_partitioned = False
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return()
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def getPartitions(self):
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# For GPT, this *technically* should be 34 -- or, more precisely, 2048 (see FAQ in manual), but the alignment
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# optimizer fixes it for us automatically.
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# But for DOS tables, it's required.
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if self.tabletype == 'msdos':
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start_sector = 2048
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else:
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start_sector = 0
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self.partitions = []
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xml_partitions = self.xml.findall('part')
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for idx, part in enumerate(xml_partitions):
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partnum = idx + 1
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if self.tabletype == 'gpt':
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p = Partition(part, self.disk, start_sector, partnum, self.tabletype)
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else:
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parttype = 'primary'
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if len(xml_partitions) > 4:
|
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if partnum == 4:
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parttype = 'extended'
|
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elif partnum > 4:
|
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parttype = 'logical'
|
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p = Partition(part, self.disk, start_sector, partnum, self.tabletype, part_type = parttype)
|
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start_sector = p.end + 1
|
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self.partitions.append(p)
|
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return()
|
|
||||||
|
|
||||||
def partFormat(self):
|
|
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if self.is_partitioned:
|
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return()
|
|
||||||
if not self.is_lowformatted:
|
|
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self.diskFormat()
|
|
||||||
# This is a safeguard. We do *not* want to partition a disk that is mounted.
|
|
||||||
for p in psutil.disk_partitions(all = True):
|
|
||||||
if self.devpath in p:
|
|
||||||
raise RuntimeError('{0} is mounted; we are cowardly refusing to low-format it'.format(self.devpath))
|
|
||||||
if not self.partitions:
|
|
||||||
self.getPartitions()
|
|
||||||
if not self.partitions:
|
|
||||||
return()
|
|
||||||
for p in self.partitions:
|
|
||||||
self.disk.addPartition(partition = p, constraint = self.device.optimalAlignedConstraint)
|
|
||||||
self.disk.commit()
|
|
||||||
p.devpath = p.partition.path
|
|
||||||
p.is_hiformatted = True
|
|
||||||
self.is_partitioned = True
|
|
||||||
return()
|
|
||||||
|
|||||||
225
aif/disk/block_fallback.py
Normal file
225
aif/disk/block_fallback.py
Normal file
@ -0,0 +1,225 @@
|
|||||||
|
# To reproduce sgdisk behaviour in v1 of AIF-NG:
|
||||||
|
# https://gist.github.com/herry13/5931cac426da99820de843477e41e89e
|
||||||
|
# https://github.com/dcantrell/pyparted/blob/master/examples/query_device_capacity.py
|
||||||
|
# TODO: Remember to replicate genfstab behaviour.
|
||||||
|
|
||||||
|
import os
|
||||||
|
import re
|
||||||
|
import subprocess
|
||||||
|
try:
|
||||||
|
# https://stackoverflow.com/a/34812552/733214
|
||||||
|
# https://github.com/karelzak/util-linux/blob/master/libmount/python/test_mount_context.py#L6
|
||||||
|
import libmount as mount
|
||||||
|
except ImportError:
|
||||||
|
# We should never get here. util-linux is part of core (base) in Arch and uses "libmount".
|
||||||
|
import pylibmount as mount
|
||||||
|
##
|
||||||
|
# import blkinfo
|
||||||
|
import parted # https://www.gnu.org/software/parted/api/index.html
|
||||||
|
import psutil
|
||||||
|
##
|
||||||
|
from aif.utils import xmlBool, size
|
||||||
|
|
||||||
|
# TODO: https://serverfault.com/questions/356534/ssd-erase-block-size-lvm-pv-on-raw-device-alignment
|
||||||
|
|
||||||
|
|
||||||
|
PARTED_FSTYPES = sorted(list(dict(vars(parted.filesystem))['fileSystemType'].keys()))
|
||||||
|
PARTED_FLAGS = sorted(list(parted.partition.partitionFlag.values()))
|
||||||
|
IDX_FLAG = dict(parted.partition.partitionFlag)
|
||||||
|
FLAG_IDX = {v: k for k, v in IDX_FLAG.items()}
|
||||||
|
|
||||||
|
# parted lib can do SI or IEC. So can we.
|
||||||
|
_pos_re = re.compile((r'^(?P<pos_or_neg>-|\+)?\s*'
|
||||||
|
r'(?P<size>[0-9]+)\s*'
|
||||||
|
# empty means size in sectors
|
||||||
|
r'(?P<pct_unit_or_sct>%|{0}|)\s*$'.format('|'.join(size.valid_storage))
|
||||||
|
))
|
||||||
|
|
||||||
|
|
||||||
|
def convertSizeUnit(pos):
|
||||||
|
orig_pos = pos
|
||||||
|
pos = _pos_re.search(pos)
|
||||||
|
if pos:
|
||||||
|
pos_or_neg = (pos.group('pos_or_neg') if pos.group('pos_or_neg') else None)
|
||||||
|
if pos_or_neg == '+':
|
||||||
|
from_beginning = True
|
||||||
|
elif pos_or_neg == '-':
|
||||||
|
from_beginning = False
|
||||||
|
else:
|
||||||
|
from_beginning = pos_or_neg
|
||||||
|
_size = int(pos.group('size'))
|
||||||
|
amt_type = pos.group('pct_unit_or_sct').strip()
|
||||||
|
else:
|
||||||
|
raise ValueError('Invalid size specified: {0}'.format(orig_pos))
|
||||||
|
return((from_beginning, _size, amt_type))
|
||||||
|
|
||||||
|
|
||||||
|
class Partition(object):
|
||||||
|
def __init__(self, part_xml, diskobj, start_sector, partnum, tbltype, part_type = None):
|
||||||
|
if tbltype not in ('gpt', 'msdos'):
|
||||||
|
raise ValueError('{0} must be one of gpt or msdos'.format(tbltype))
|
||||||
|
if tbltype == 'msdos' and part_type not in ('primary', 'extended', 'logical'):
|
||||||
|
raise ValueError(('You must specify if this is a '
|
||||||
|
'primary, extended, or logical partition for msdos partition tables'))
|
||||||
|
self.xml = part_xml
|
||||||
|
self.id = part_xml.attrib['id']
|
||||||
|
self.flags = set()
|
||||||
|
for f in self.xml.findall('partitionFlag'):
|
||||||
|
if f.text in PARTED_FLAGS:
|
||||||
|
self.flags.add(f.text)
|
||||||
|
self.flags = sorted(list(self.flags))
|
||||||
|
self.partnum = partnum
|
||||||
|
if tbltype == 'msdos':
|
||||||
|
if partnum > 4:
|
||||||
|
self.part_type = parted.PARTITION_LOGICAL
|
||||||
|
else:
|
||||||
|
if part_type == 'extended':
|
||||||
|
self.part_type = parted.PARTITION_EXTENDED
|
||||||
|
elif part_type == 'logical':
|
||||||
|
self.part_type = parted.PARTITION_LOGICAL
|
||||||
|
else:
|
||||||
|
self.part_type = parted.PARTITION_NORMAL
|
||||||
|
self.fstype = self.xml.attrib['fsType'].lower()
|
||||||
|
if self.fstype not in PARTED_FSTYPES:
|
||||||
|
raise ValueError(('{0} is not a valid partition filesystem type; '
|
||||||
|
'must be one of: {1}').format(self.xml.attrib['fsType'],
|
||||||
|
', '.join(sorted(PARTED_FSTYPES))))
|
||||||
|
self.disk = diskobj
|
||||||
|
self.device = self.disk.device
|
||||||
|
self.devpath = '{0}{1}'.format(self.device.path, partnum)
|
||||||
|
self.is_hiformatted = False
|
||||||
|
sizes = {}
|
||||||
|
for s in ('start', 'stop'):
|
||||||
|
x = dict(zip(('from_bgn', 'size', 'type'),
|
||||||
|
convertSizeUnit(self.xml.attrib[s])))
|
||||||
|
sectors = x['size']
|
||||||
|
if x['type'] == '%':
|
||||||
|
sectors = int(self.device.getLength() / x['size'])
|
||||||
|
else:
|
||||||
|
sectors = int(size.convertStorage(x['size'], x['type'], target = 'B') / self.device.sectorSize)
|
||||||
|
sizes[s] = (sectors, x['from_bgn'])
|
||||||
|
if sizes['start'][1] is not None:
|
||||||
|
if sizes['start'][1]:
|
||||||
|
self.begin = sizes['start'][0] + 0
|
||||||
|
else:
|
||||||
|
self.begin = self.device.getLength() - sizes['start'][0]
|
||||||
|
else:
|
||||||
|
self.begin = sizes['start'][0] + start_sector
|
||||||
|
if sizes['stop'][1] is not None:
|
||||||
|
if sizes['stop'][1]:
|
||||||
|
self.end = sizes['stop'][0] + 0
|
||||||
|
else:
|
||||||
|
# This *technically* should be - 34, at least for gpt, but the alignment optimizer fixes it for us.
|
||||||
|
self.end = (self.device.getLength() - 1) - sizes['stop'][0]
|
||||||
|
else:
|
||||||
|
self.end = self.begin + sizes['stop'][0]
|
||||||
|
# TECHNICALLY we could craft the Geometry object with "length = ...", but it doesn't let us be explicit
|
||||||
|
# in configs. So we manually crunch the numbers and do it all at the end.
|
||||||
|
self.geometry = parted.Geometry(device = self.device,
|
||||||
|
start = self.begin,
|
||||||
|
end = self.end)
|
||||||
|
self.filesystem = parted.FileSystem(type = self.fstype,
|
||||||
|
geometry = self.geometry)
|
||||||
|
self.partition = parted.Partition(disk = diskobj,
|
||||||
|
type = self.part_type,
|
||||||
|
geometry = self.geometry,
|
||||||
|
fs = self.filesystem)
|
||||||
|
for f in self.flags[:]:
|
||||||
|
flag_id = FLAG_IDX[f]
|
||||||
|
if self.partition.isFlagAvailable(flag_id):
|
||||||
|
self.partition.setFlag(flag_id)
|
||||||
|
else:
|
||||||
|
self.flags.remove(f)
|
||||||
|
if tbltype == 'gpt' and self.xml.attrib.get('name'):
|
||||||
|
# The name attribute setting is b0rk3n, so we operate on the underlying PedPartition object.
|
||||||
|
# https://github.com/dcantrell/pyparted/issues/49#issuecomment-540096687
|
||||||
|
# https://github.com/dcantrell/pyparted/issues/65
|
||||||
|
# self.partition.name = self.xml.attrib.get('name')
|
||||||
|
_pedpart = self.partition.getPedPartition()
|
||||||
|
_pedpart.set_name(self.xml.attrib.get('name'))
|
||||||
|
|
||||||
|
def detect(self):
|
||||||
|
pass
|
||||||
|
|
||||||
|
|
||||||
|
class Disk(object):
|
||||||
|
def __init__(self, disk_xml):
|
||||||
|
self.xml = disk_xml
|
||||||
|
self.devpath = self.xml.attrib['device']
|
||||||
|
self._initDisk()
|
||||||
|
|
||||||
|
def _initDisk(self):
|
||||||
|
self.tabletype = self.xml.attrib.get('diskFormat', 'gpt').lower()
|
||||||
|
if self.tabletype in ('bios', 'mbr', 'dos'):
|
||||||
|
self.tabletype = 'msdos'
|
||||||
|
validlabels = parted.getLabels()
|
||||||
|
if self.tabletype not in validlabels:
|
||||||
|
raise ValueError(('Disk format {0} is not valid for this architecture;'
|
||||||
|
'must be one of: {1}'.format(self.tabletype, ', '.join(list(validlabels)))))
|
||||||
|
self.device = parted.getDevice(self.devpath)
|
||||||
|
self.disk = parted.freshDisk(self.device, self.tabletype)
|
||||||
|
self.is_lowformatted = False
|
||||||
|
self.is_hiformatted = False
|
||||||
|
self.is_partitioned = False
|
||||||
|
self.partitions = []
|
||||||
|
return()
|
||||||
|
|
||||||
|
def diskFormat(self):
|
||||||
|
if self.is_lowformatted:
|
||||||
|
return()
|
||||||
|
# This is a safeguard. We do *not* want to low-format a disk that is mounted.
|
||||||
|
for p in psutil.disk_partitions(all = True):
|
||||||
|
if self.devpath in p:
|
||||||
|
raise RuntimeError('{0} is mounted; we are cowardly refusing to low-format it'.format(self.devpath))
|
||||||
|
self.disk.deleteAllPartitions()
|
||||||
|
self.disk.commit()
|
||||||
|
self.is_lowformatted = True
|
||||||
|
self.is_partitioned = False
|
||||||
|
return()
|
||||||
|
|
||||||
|
def getPartitions(self):
|
||||||
|
# For GPT, this *technically* should be 34 -- or, more precisely, 2048 (see FAQ in manual), but the alignment
|
||||||
|
# optimizer fixes it for us automatically.
|
||||||
|
# But for DOS tables, it's required.
|
||||||
|
if self.tabletype == 'msdos':
|
||||||
|
start_sector = 2048
|
||||||
|
else:
|
||||||
|
start_sector = 0
|
||||||
|
self.partitions = []
|
||||||
|
xml_partitions = self.xml.findall('part')
|
||||||
|
for idx, part in enumerate(xml_partitions):
|
||||||
|
partnum = idx + 1
|
||||||
|
if self.tabletype == 'gpt':
|
||||||
|
p = Partition(part, self.disk, start_sector, partnum, self.tabletype)
|
||||||
|
else:
|
||||||
|
parttype = 'primary'
|
||||||
|
if len(xml_partitions) > 4:
|
||||||
|
if partnum == 4:
|
||||||
|
parttype = 'extended'
|
||||||
|
elif partnum > 4:
|
||||||
|
parttype = 'logical'
|
||||||
|
p = Partition(part, self.disk, start_sector, partnum, self.tabletype, part_type = parttype)
|
||||||
|
start_sector = p.end + 1
|
||||||
|
self.partitions.append(p)
|
||||||
|
return()
|
||||||
|
|
||||||
|
def partFormat(self):
|
||||||
|
if self.is_partitioned:
|
||||||
|
return()
|
||||||
|
if not self.is_lowformatted:
|
||||||
|
self.diskFormat()
|
||||||
|
# This is a safeguard. We do *not* want to partition a disk that is mounted.
|
||||||
|
for p in psutil.disk_partitions(all = True):
|
||||||
|
if self.devpath in p:
|
||||||
|
raise RuntimeError('{0} is mounted; we are cowardly refusing to low-format it'.format(self.devpath))
|
||||||
|
if not self.partitions:
|
||||||
|
self.getPartitions()
|
||||||
|
if not self.partitions:
|
||||||
|
return()
|
||||||
|
for p in self.partitions:
|
||||||
|
self.disk.addPartition(partition = p, constraint = self.device.optimalAlignedConstraint)
|
||||||
|
self.disk.commit()
|
||||||
|
p.devpath = p.partition.path
|
||||||
|
p.is_hiformatted = True
|
||||||
|
self.is_partitioned = True
|
||||||
|
return()
|
||||||
@ -1,80 +1,3 @@
|
|||||||
import os
|
from . import _common
|
||||||
import re
|
|
||||||
import subprocess
|
|
||||||
##
|
|
||||||
import psutil
|
|
||||||
##
|
|
||||||
import aif.disk.block
|
|
||||||
import aif.disk.luks
|
|
||||||
import aif.disk.lvm
|
|
||||||
import aif.disk.mdadm
|
|
||||||
|
|
||||||
# I wish there was a better way of doing this.
|
BlockDev = _common.BlockDev
|
||||||
# https://unix.stackexchange.com/a/98680
|
|
||||||
FS_FSTYPES = []
|
|
||||||
with open('/proc/filesystems', 'r') as fh:
|
|
||||||
for line in fh.readlines():
|
|
||||||
l = [i.strip() for i in line.split()]
|
|
||||||
if not l:
|
|
||||||
continue
|
|
||||||
if len(l) == 1:
|
|
||||||
FS_FSTYPES.append(l[0])
|
|
||||||
else:
|
|
||||||
FS_FSTYPES.append(l[1])
|
|
||||||
_mod_dir = os.path.join('/lib/modules',
|
|
||||||
os.uname().release,
|
|
||||||
'kernel/fs')
|
|
||||||
_strip_mod_suffix = re.compile(r'(?P<fsname>)\.ko(\.(x|g)?z)?$', re.IGNORECASE)
|
|
||||||
for i in os.listdir(_mod_dir):
|
|
||||||
path = os.path.join(_mod_dir, i)
|
|
||||||
fs_name = None
|
|
||||||
if os.path.isdir(path):
|
|
||||||
fs_name = i
|
|
||||||
elif os.path.isfile(path):
|
|
||||||
mod_name = _strip_mod_suffix.search(i)
|
|
||||||
fs_name = mod_name.group('fsname')
|
|
||||||
if fs_name:
|
|
||||||
# The kernel *probably* has autoloading enabled, but in case it doesn't...
|
|
||||||
# TODO: logging!
|
|
||||||
if os.getuid() == 0:
|
|
||||||
subprocess.run(['modprobe', fs_name])
|
|
||||||
FS_FSTYPES.append(fs_name)
|
|
||||||
|
|
||||||
|
|
||||||
class FS(object):
|
|
||||||
def __init__(self, fs_xml, sourceobj):
|
|
||||||
self.xml = fs_xml
|
|
||||||
if not isinstance(sourceobj, (aif.disk.block.Disk,
|
|
||||||
aif.disk.block.Partition,
|
|
||||||
aif.disk.luks.LUKS,
|
|
||||||
aif.disk.lvm.LV,
|
|
||||||
aif.disk.mdadm.Array)):
|
|
||||||
raise ValueError(('sourceobj must be of type '
|
|
||||||
'aif.disk.block.Partition, '
|
|
||||||
'aif.disk.luks.LUKS, '
|
|
||||||
'aif.disk.lvm.LV, or'
|
|
||||||
'aif.disk.mdadm.Array'))
|
|
||||||
self.source = sourceobj
|
|
||||||
self.devpath = sourceobj.devpath
|
|
||||||
self.formatted = False
|
|
||||||
self.fstype = self.xml.attrib.get('type')
|
|
||||||
|
|
||||||
def format(self):
|
|
||||||
if self.formatted:
|
|
||||||
return ()
|
|
||||||
# This is a safeguard. We do *not* want to high-format a disk that is mounted.
|
|
||||||
for p in psutil.disk_partitions(all = True):
|
|
||||||
if self.devpath in p:
|
|
||||||
raise RuntimeError(('{0} is mounted;'
|
|
||||||
'we are cowardly refusing to apply a filesystem to it').format(self.devpath))
|
|
||||||
# TODO! Logging
|
|
||||||
cmd = ['mkfs',
|
|
||||||
'-t', self.fstype]
|
|
||||||
for o in self.xml.findall('opt'):
|
|
||||||
cmd.append(o.attrib['name'])
|
|
||||||
if o.text:
|
|
||||||
cmd.append(o.text)
|
|
||||||
cmd.append(self.devpath)
|
|
||||||
subprocess.run(cmd)
|
|
||||||
self.is_hiformatted = True
|
|
||||||
return()
|
|
||||||
|
|||||||
80
aif/disk/filesystem_fallback.py
Normal file
80
aif/disk/filesystem_fallback.py
Normal file
@ -0,0 +1,80 @@
|
|||||||
|
import os
|
||||||
|
import re
|
||||||
|
import subprocess
|
||||||
|
##
|
||||||
|
import psutil
|
||||||
|
##
|
||||||
|
import aif.disk.block_fallback as block
|
||||||
|
import aif.disk.luks_fallback as luks
|
||||||
|
import aif.disk.lvm_fallback as lvm
|
||||||
|
import aif.disk.mdadm_fallback as mdadm
|
||||||
|
|
||||||
|
# I wish there was a better way of doing this.
|
||||||
|
# https://unix.stackexchange.com/a/98680
|
||||||
|
FS_FSTYPES = []
|
||||||
|
with open('/proc/filesystems', 'r') as fh:
|
||||||
|
for line in fh.readlines():
|
||||||
|
l = [i.strip() for i in line.split()]
|
||||||
|
if not l:
|
||||||
|
continue
|
||||||
|
if len(l) == 1:
|
||||||
|
FS_FSTYPES.append(l[0])
|
||||||
|
else:
|
||||||
|
FS_FSTYPES.append(l[1])
|
||||||
|
_mod_dir = os.path.join('/lib/modules',
|
||||||
|
os.uname().release,
|
||||||
|
'kernel/fs')
|
||||||
|
_strip_mod_suffix = re.compile(r'(?P<fsname>)\.ko(\.(x|g)?z)?$', re.IGNORECASE)
|
||||||
|
for i in os.listdir(_mod_dir):
|
||||||
|
path = os.path.join(_mod_dir, i)
|
||||||
|
fs_name = None
|
||||||
|
if os.path.isdir(path):
|
||||||
|
fs_name = i
|
||||||
|
elif os.path.isfile(path):
|
||||||
|
mod_name = _strip_mod_suffix.search(i)
|
||||||
|
fs_name = mod_name.group('fsname')
|
||||||
|
if fs_name:
|
||||||
|
# The kernel *probably* has autoloading enabled, but in case it doesn't...
|
||||||
|
# TODO: logging!
|
||||||
|
if os.getuid() == 0:
|
||||||
|
subprocess.run(['modprobe', fs_name])
|
||||||
|
FS_FSTYPES.append(fs_name)
|
||||||
|
|
||||||
|
|
||||||
|
class FS(object):
|
||||||
|
def __init__(self, fs_xml, sourceobj):
|
||||||
|
self.xml = fs_xml
|
||||||
|
if not isinstance(sourceobj, (aif.disk.block_fallback.Disk,
|
||||||
|
aif.disk.block_fallback.Partition,
|
||||||
|
aif.disk.luks_fallback.LUKS,
|
||||||
|
aif.disk.lvm_fallback.LV,
|
||||||
|
aif.disk.mdadm_fallback.Array)):
|
||||||
|
raise ValueError(('sourceobj must be of type '
|
||||||
|
'aif.disk.block.Partition, '
|
||||||
|
'aif.disk.luks.LUKS, '
|
||||||
|
'aif.disk.lvm.LV, or'
|
||||||
|
'aif.disk.mdadm.Array'))
|
||||||
|
self.source = sourceobj
|
||||||
|
self.devpath = sourceobj.devpath
|
||||||
|
self.formatted = False
|
||||||
|
self.fstype = self.xml.attrib.get('type')
|
||||||
|
|
||||||
|
def format(self):
|
||||||
|
if self.formatted:
|
||||||
|
return ()
|
||||||
|
# This is a safeguard. We do *not* want to high-format a disk that is mounted.
|
||||||
|
for p in psutil.disk_partitions(all = True):
|
||||||
|
if self.devpath in p:
|
||||||
|
raise RuntimeError(('{0} is mounted;'
|
||||||
|
'we are cowardly refusing to apply a filesystem to it').format(self.devpath))
|
||||||
|
# TODO! Logging
|
||||||
|
cmd = ['mkfs',
|
||||||
|
'-t', self.fstype]
|
||||||
|
for o in self.xml.findall('opt'):
|
||||||
|
cmd.append(o.attrib['name'])
|
||||||
|
if o.text:
|
||||||
|
cmd.append(o.text)
|
||||||
|
cmd.append(self.devpath)
|
||||||
|
subprocess.run(cmd)
|
||||||
|
self.is_hiformatted = True
|
||||||
|
return()
|
||||||
@ -1,9 +1,3 @@
|
|||||||
import aif.disk.block
|
from . import _common
|
||||||
import aif.disk.lvm
|
|
||||||
import aif.disk.mdadm
|
|
||||||
|
|
||||||
|
BlockDev = _common.BlockDev
|
||||||
class LUKS(object):
|
|
||||||
def __init__(self, partobj):
|
|
||||||
self.devpath = None
|
|
||||||
pass
|
|
||||||
|
|||||||
9
aif/disk/luks_fallback.py
Normal file
9
aif/disk/luks_fallback.py
Normal file
@ -0,0 +1,9 @@
|
|||||||
|
import aif.disk.block_fallback as block
|
||||||
|
import aif.disk.lvm_fallback as lvm
|
||||||
|
import aif.disk.mdadm_fallback as mdadm
|
||||||
|
|
||||||
|
|
||||||
|
class LUKS(object):
|
||||||
|
def __init__(self, partobj):
|
||||||
|
self.devpath = None
|
||||||
|
pass
|
||||||
@ -1,29 +1,3 @@
|
|||||||
try:
|
from . import _common
|
||||||
import dbus
|
|
||||||
has_mod = True
|
|
||||||
except ImportError:
|
|
||||||
# This is ineffecient; the native dbus module is preferred.
|
|
||||||
# In Arch, this can be installed via the 'extra' repository package "python-dbus".
|
|
||||||
import subprocess
|
|
||||||
has_mod = False
|
|
||||||
##
|
|
||||||
import aif.disk.block
|
|
||||||
import aif.disk.luks
|
|
||||||
import aif.disk.mdadm
|
|
||||||
|
|
||||||
|
BlockDev = _common.BlockDev
|
||||||
class PV(object):
|
|
||||||
def __init__(self, partobj):
|
|
||||||
self.devpath = None
|
|
||||||
pass
|
|
||||||
|
|
||||||
|
|
||||||
class VG(object):
|
|
||||||
def __init__(self, vg_xml, lv_objs):
|
|
||||||
self.devpath = None
|
|
||||||
pass
|
|
||||||
|
|
||||||
|
|
||||||
class LV(object):
|
|
||||||
def __init__(self, lv_xml, pv_objs):
|
|
||||||
pass
|
|
||||||
|
|||||||
31
aif/disk/lvm_fallback.py
Normal file
31
aif/disk/lvm_fallback.py
Normal file
@ -0,0 +1,31 @@
|
|||||||
|
try:
|
||||||
|
import gi
|
||||||
|
gi.require_version('BlockDev', '2.0')
|
||||||
|
from gi.repository import BlockDev, GLib
|
||||||
|
has_mod = True
|
||||||
|
except ImportError:
|
||||||
|
# This is ineffecient; the native gobject-introspection module is preferred.
|
||||||
|
# In Arch, this can be installed via the "extra" repository packages "libblockdev" and "python-gobject".
|
||||||
|
import subprocess
|
||||||
|
has_mod = False
|
||||||
|
##
|
||||||
|
import aif.disk.block_fallback as block
|
||||||
|
import aif.disk.luks_fallback as luks
|
||||||
|
import aif.disk.mdadm_fallback as mdadm
|
||||||
|
|
||||||
|
|
||||||
|
class PV(object):
|
||||||
|
def __init__(self, partobj):
|
||||||
|
self.devpath = None
|
||||||
|
pass
|
||||||
|
|
||||||
|
|
||||||
|
class VG(object):
|
||||||
|
def __init__(self, vg_xml, lv_objs):
|
||||||
|
self.devpath = None
|
||||||
|
pass
|
||||||
|
|
||||||
|
|
||||||
|
class LV(object):
|
||||||
|
def __init__(self, lv_xml, pv_objs):
|
||||||
|
pass
|
||||||
@ -1,260 +1,3 @@
|
|||||||
import copy
|
from . import _common
|
||||||
import datetime
|
|
||||||
import math
|
|
||||||
import re
|
|
||||||
import subprocess
|
|
||||||
import uuid
|
|
||||||
##
|
|
||||||
import mdstat
|
|
||||||
##
|
|
||||||
import aif.disk.block
|
|
||||||
import aif.disk.luks
|
|
||||||
import aif.disk.lvm
|
|
||||||
|
|
||||||
|
BlockDev = _common.BlockDev
|
||||||
SUPPORTED_LEVELS = (0, 1, 4, 5, 6, 10)
|
|
||||||
SUPPORTED_METADATA = ('0', '0.90', '1', '1.0', '1.1', '1.2', 'default', 'ddf', 'imsm')
|
|
||||||
SUPPORTED_LAYOUTS = {5: (re.compile(r'^((left|right)-a?symmetric|[lr][as]|'
|
|
||||||
r'parity-(fir|la)st|'
|
|
||||||
r'ddf-(N|zero)-restart|ddf-N-continue)$'),
|
|
||||||
'left-symmetric'),
|
|
||||||
6: (re.compile(r'^((left|right)-a?symmetric(-6)?|[lr][as]|'
|
|
||||||
r'parity-(fir|la)st|'
|
|
||||||
r'ddf-(N|zero)-restart|ddf-N-continue|'
|
|
||||||
r'parity-first-6)$'),
|
|
||||||
None),
|
|
||||||
10: (re.compile(r'^[nof][0-9]+$'),
|
|
||||||
None)}
|
|
||||||
|
|
||||||
_mdblock_size_re = re.compile(r'^(?P<sectors>[0-9]+)\s+'
|
|
||||||
r'\((?P<GiB>[0-9.]+)\s+GiB\s+'
|
|
||||||
r'(?P<GB>[0-9.]+)\s+GB\)')
|
|
||||||
_mdblock_unused_re = re.compile(r'^before=(?P<before>[0-9]+)\s+sectors,'
|
|
||||||
r'\s+after=(?P<after>[0-9]+)\s+sectors$')
|
|
||||||
_mdblock_badblock_re = re.compile(r'^(?P<entries>[0-9]+)\s+entries'
|
|
||||||
r'[A-Za-z\s]+'
|
|
||||||
r'(?P<offset>[0-9]+)\s+sectors$')
|
|
||||||
|
|
||||||
def _itTakesTwo(n):
|
|
||||||
# So dumb.
|
|
||||||
isPowerOf2 = math.ceil(math.log(n, 2)) == math.floor(math.log(n, 2))
|
|
||||||
return(isPowerOf2)
|
|
||||||
|
|
||||||
def _safeChunks(n):
|
|
||||||
if (n % 4) != 0:
|
|
||||||
return(False)
|
|
||||||
return(True)
|
|
||||||
|
|
||||||
|
|
||||||
class Member(object):
|
|
||||||
def __init__(self, member_xml, partobj):
|
|
||||||
self.xml = member_xml
|
|
||||||
self.device = partobj
|
|
||||||
if not isinstance(self.device, (aif.disk.block.Partition,
|
|
||||||
aif.disk.block.Disk,
|
|
||||||
aif.disk.mdadm.Array,
|
|
||||||
aif.disk.lvm.LV,
|
|
||||||
aif.disk.luks.LUKS)):
|
|
||||||
raise ValueError(('partobj must be of type aif.disk.block.Partition, '
|
|
||||||
'aif.disk.block.Disk, or aif.disk.mdadm.Array'))
|
|
||||||
self.devpath = self.device.devpath
|
|
||||||
self.is_superblocked = None
|
|
||||||
self.superblock = None
|
|
||||||
self._parseDeviceBlock()
|
|
||||||
|
|
||||||
def _parseDeviceBlock(self):
|
|
||||||
# I can't believe the mdstat module doesn't really have a way to do this.
|
|
||||||
super = subprocess.run(['mdadm', '--examine', self.devpath],
|
|
||||||
stdout = subprocess.PIPE,
|
|
||||||
stderr = subprocess.PIPE)
|
|
||||||
if super.returncode != 0:
|
|
||||||
# TODO: logging?
|
|
||||||
self.is_superblocked = False
|
|
||||||
return(None)
|
|
||||||
block = {}
|
|
||||||
for idx, line in enumerate(super.stdout.decode('utf-8').splitlines()):
|
|
||||||
line = line.strip()
|
|
||||||
if idx == 0: # This is just the same as self.device.devpath.
|
|
||||||
continue
|
|
||||||
if line == '':
|
|
||||||
continue
|
|
||||||
k, v = [i.strip() for i in line.split(':', 1)]
|
|
||||||
orig_k = k
|
|
||||||
k = re.sub(r'\s+', '_', k.lower())
|
|
||||||
if k in ('raid_devices', 'events'):
|
|
||||||
v = int(v)
|
|
||||||
elif k == 'magic':
|
|
||||||
v = bytes.fromhex(v)
|
|
||||||
elif k == 'name':
|
|
||||||
# TODO: Will this *always* give 2 values?
|
|
||||||
name, local_to = [i.strip() for i in v.split(None, 1)]
|
|
||||||
local_to = re.sub(r'[()]', '', local_to)
|
|
||||||
v = (name, local_to)
|
|
||||||
elif k == 'raid_level':
|
|
||||||
v = re.sub(r'^raid', '', v)
|
|
||||||
elif k == 'checksum':
|
|
||||||
cksum, status = [i.strip() for i in v.split('-')]
|
|
||||||
v = (bytes.fromhex(cksum), status)
|
|
||||||
elif k == 'unused_space':
|
|
||||||
r = _mdblock_unused_re.search(v)
|
|
||||||
if not r:
|
|
||||||
raise ValueError(('Could not parse {0} for '
|
|
||||||
'{1}\'s superblock').format(orig_k,
|
|
||||||
self.devpath))
|
|
||||||
v = {}
|
|
||||||
for i in ('before', 'after'):
|
|
||||||
v[i] = int(r.group(i)) # in sectors
|
|
||||||
elif k == 'bad_block_log':
|
|
||||||
k = 'badblock_log_entries'
|
|
||||||
r = _mdblock_badblock_re.search(v)
|
|
||||||
if not r:
|
|
||||||
raise ValueError(('Could not parse {0} for '
|
|
||||||
'{1}\'s superblock').format(orig_k,
|
|
||||||
self.devpath))
|
|
||||||
v = {}
|
|
||||||
for i in ('entries', 'offset'):
|
|
||||||
v[i] = int(r.group(i)) # offset is in sectors
|
|
||||||
elif k == 'array_state':
|
|
||||||
v = [i.strip() for i in v.split(None, 1)][0].split()
|
|
||||||
elif k == 'device_uuid':
|
|
||||||
v = uuid.UUID(hex = v.replace(':', '-'))
|
|
||||||
elif re.search((r'^(creation|update)_time$'), k):
|
|
||||||
# TODO: Is this portable/correct? Or do I need to do '%a %b %d %H:%M:%s %Y'?
|
|
||||||
v = datetime.datetime.strptime(v, '%c')
|
|
||||||
elif re.search(r'^((avail|used)_dev|array)_size$', k):
|
|
||||||
r = _mdblock_size_re.search(v)
|
|
||||||
if not r:
|
|
||||||
raise ValueError(('Could not parse {0} for '
|
|
||||||
'{1}\'s superblock').format(orig_k,
|
|
||||||
self.devpath))
|
|
||||||
v = {}
|
|
||||||
for i in ('sectors', 'GB', 'GiB'):
|
|
||||||
v[i] = float(r.group(i))
|
|
||||||
if i == 'sectors':
|
|
||||||
v[i] = int(v[i])
|
|
||||||
elif re.search(r'^(data|super)_offset$', k):
|
|
||||||
v = int(v.split(None, 1)[0])
|
|
||||||
block[k] = v
|
|
||||||
self.superblock = block
|
|
||||||
self.is_superblocked = True
|
|
||||||
return()
|
|
||||||
|
|
||||||
def prepare(self):
|
|
||||||
if self.is_superblocked:
|
|
||||||
# TODO: logging
|
|
||||||
subprocess.run(['mdadm', '--misc', '--zero-superblock', self.devpath])
|
|
||||||
self.is_superblocked = False
|
|
||||||
return()
|
|
||||||
|
|
||||||
class Array(object):
|
|
||||||
def __init__(self, array_xml, homehost, devpath = None):
|
|
||||||
self.xml = array_xml
|
|
||||||
self.id = array_xml.attrib['id']
|
|
||||||
self.level = int(self.xml.attrib['level'])
|
|
||||||
if self.level not in SUPPORTED_LEVELS:
|
|
||||||
raise ValueError('RAID level must be one of: {0}'.format(', '.join([str(i) for i in SUPPORTED_LEVELS])))
|
|
||||||
self.metadata = self.xml.attrib.get('meta', '1.2')
|
|
||||||
if self.metadata not in SUPPORTED_METADATA:
|
|
||||||
raise ValueError('Metadata version must be one of: {0}'.format(', '.join(SUPPORTED_METADATA)))
|
|
||||||
self.chunksize = int(self.xml.attrib.get('chunkSize', 512))
|
|
||||||
if self.level in (4, 5, 6, 10):
|
|
||||||
if not _itTakesTwo(self.chunksize):
|
|
||||||
# TODO: log.warn instead of raise exception? Will mdadm lose its marbles if it *isn't* a proper number?
|
|
||||||
raise ValueError('chunksize must be a power of 2 for the RAID level you specified')
|
|
||||||
if self.level in (0, 4, 5, 6, 10):
|
|
||||||
if not _safeChunks(self.chunksize):
|
|
||||||
# TODO: log.warn instead of raise exception? Will mdadm lose its marbles if it *isn't* a proper number?
|
|
||||||
raise ValueError('chunksize must be divisible by 4 for the RAID level you specified')
|
|
||||||
self.layout = self.xml.attrib.get('layout', 'none')
|
|
||||||
if self.level in SUPPORTED_LAYOUTS.keys():
|
|
||||||
matcher, layout_default = SUPPORTED_LAYOUTS[self.level]
|
|
||||||
if not matcher.search(self.layout):
|
|
||||||
if layout_default:
|
|
||||||
self.layout = layout_default
|
|
||||||
else:
|
|
||||||
self.layout = None # TODO: log.warn?
|
|
||||||
else:
|
|
||||||
self.layout = None
|
|
||||||
self.devname = self.xml.attrib['name']
|
|
||||||
self.devpath = devpath
|
|
||||||
self.updateStatus()
|
|
||||||
self.homehost = homehost
|
|
||||||
self.members = []
|
|
||||||
self.state = None
|
|
||||||
self.info = None
|
|
||||||
|
|
||||||
def addMember(self, memberobj):
|
|
||||||
if not isinstance(memberobj, Member):
|
|
||||||
raise ValueError('memberobj must be of type aif.disk.mdadm.Member')
|
|
||||||
memberobj.prepare()
|
|
||||||
self.members.append(memberobj)
|
|
||||||
return()
|
|
||||||
|
|
||||||
def start(self, scan = False):
|
|
||||||
if not any((self.members, self.devpath)):
|
|
||||||
raise RuntimeError('Cannot assemble an array with no members (for hints) or device path')
|
|
||||||
cmd = ['mdadm', '--assemble', self.devpath]
|
|
||||||
if not scan:
|
|
||||||
for m in self.members:
|
|
||||||
cmd.append(m.devpath)
|
|
||||||
else:
|
|
||||||
cmd.append('--scan')
|
|
||||||
# TODO: logging!
|
|
||||||
subprocess.run(cmd)
|
|
||||||
self.state = 'assembled'
|
|
||||||
return()
|
|
||||||
|
|
||||||
def create(self):
|
|
||||||
if not self.members:
|
|
||||||
raise RuntimeError('Cannot create an array with no members')
|
|
||||||
cmd = ['mdadm', '--create',
|
|
||||||
'--level={0}'.format(self.level),
|
|
||||||
'--metadata={0}'.format(self.metadata),
|
|
||||||
'--chunk={0}'.format(self.chunksize),
|
|
||||||
'--homehost={0}'.format(self.homehost),
|
|
||||||
'--raid-devices={0}'.format(len(self.members))]
|
|
||||||
if self.layout:
|
|
||||||
cmd.append('--layout={0}'.format(self.layout))
|
|
||||||
cmd.append(self.devpath)
|
|
||||||
for m in self.members:
|
|
||||||
cmd.append(m.devpath)
|
|
||||||
# TODO: logging!
|
|
||||||
subprocess.run(cmd)
|
|
||||||
self.writeConf()
|
|
||||||
self.state = 'new'
|
|
||||||
return()
|
|
||||||
|
|
||||||
def stop(self):
|
|
||||||
# TODO: logging
|
|
||||||
subprocess.run(['mdadm', '--stop', self.devpath])
|
|
||||||
self.state = 'disassembled'
|
|
||||||
return()
|
|
||||||
|
|
||||||
def updateStatus(self):
|
|
||||||
_info = mdstat.parse()
|
|
||||||
for k, v in _info['devices'].items():
|
|
||||||
if k != self.devname:
|
|
||||||
del(_info['devices'][k])
|
|
||||||
self.info = copy.deepcopy(_info)
|
|
||||||
return()
|
|
||||||
|
|
||||||
def writeConf(self, conf = '/etc/mdadm.conf'):
|
|
||||||
with open(conf, 'r') as fh:
|
|
||||||
conflines = fh.read().splitlines()
|
|
||||||
# TODO: logging
|
|
||||||
arrayinfo = subprocess.run(['mdadm', '--detail', '--brief', self.devpath],
|
|
||||||
stdout = subprocess.PIPE).stdout.decode('utf-8').strip()
|
|
||||||
if arrayinfo not in conflines:
|
|
||||||
r = re.compile(r'^ARRAY\s+{0}'.format(self.devpath))
|
|
||||||
nodev = True
|
|
||||||
for l in conflines:
|
|
||||||
if r.search(l):
|
|
||||||
nodev = False
|
|
||||||
# TODO: logging?
|
|
||||||
# and/or Raise an exception here;
|
|
||||||
# an array already exists with that name but not with the same opts/GUID/etc.
|
|
||||||
break
|
|
||||||
if nodev:
|
|
||||||
with open(conf, 'a') as fh:
|
|
||||||
fh.write('{0}\n'.format(arrayinfo))
|
|
||||||
return()
|
|
||||||
|
|||||||
260
aif/disk/mdadm_fallback.py
Normal file
260
aif/disk/mdadm_fallback.py
Normal file
@ -0,0 +1,260 @@
|
|||||||
|
import copy
|
||||||
|
import datetime
|
||||||
|
import math
|
||||||
|
import re
|
||||||
|
import subprocess
|
||||||
|
import uuid
|
||||||
|
##
|
||||||
|
import mdstat
|
||||||
|
##
|
||||||
|
import aif.disk.block_fallback as block
|
||||||
|
import aif.disk.luks_fallback as luks
|
||||||
|
import aif.disk.lvm_fallback as lvm
|
||||||
|
|
||||||
|
|
||||||
|
SUPPORTED_LEVELS = (0, 1, 4, 5, 6, 10)
|
||||||
|
SUPPORTED_METADATA = ('0', '0.90', '1', '1.0', '1.1', '1.2', 'default', 'ddf', 'imsm')
|
||||||
|
SUPPORTED_LAYOUTS = {5: (re.compile(r'^((left|right)-a?symmetric|[lr][as]|'
|
||||||
|
r'parity-(fir|la)st|'
|
||||||
|
r'ddf-(N|zero)-restart|ddf-N-continue)$'),
|
||||||
|
'left-symmetric'),
|
||||||
|
6: (re.compile(r'^((left|right)-a?symmetric(-6)?|[lr][as]|'
|
||||||
|
r'parity-(fir|la)st|'
|
||||||
|
r'ddf-(N|zero)-restart|ddf-N-continue|'
|
||||||
|
r'parity-first-6)$'),
|
||||||
|
None),
|
||||||
|
10: (re.compile(r'^[nof][0-9]+$'),
|
||||||
|
None)}
|
||||||
|
|
||||||
|
_mdblock_size_re = re.compile(r'^(?P<sectors>[0-9]+)\s+'
|
||||||
|
r'\((?P<GiB>[0-9.]+)\s+GiB\s+'
|
||||||
|
r'(?P<GB>[0-9.]+)\s+GB\)')
|
||||||
|
_mdblock_unused_re = re.compile(r'^before=(?P<before>[0-9]+)\s+sectors,'
|
||||||
|
r'\s+after=(?P<after>[0-9]+)\s+sectors$')
|
||||||
|
_mdblock_badblock_re = re.compile(r'^(?P<entries>[0-9]+)\s+entries'
|
||||||
|
r'[A-Za-z\s]+'
|
||||||
|
r'(?P<offset>[0-9]+)\s+sectors$')
|
||||||
|
|
||||||
|
def _itTakesTwo(n):
|
||||||
|
# So dumb.
|
||||||
|
isPowerOf2 = math.ceil(math.log(n, 2)) == math.floor(math.log(n, 2))
|
||||||
|
return(isPowerOf2)
|
||||||
|
|
||||||
|
def _safeChunks(n):
|
||||||
|
if (n % 4) != 0:
|
||||||
|
return(False)
|
||||||
|
return(True)
|
||||||
|
|
||||||
|
|
||||||
|
class Member(object):
|
||||||
|
def __init__(self, member_xml, partobj):
|
||||||
|
self.xml = member_xml
|
||||||
|
self.device = partobj
|
||||||
|
if not isinstance(self.device, (block.Partition,
|
||||||
|
block.Disk,
|
||||||
|
Array,
|
||||||
|
lvm.LV,
|
||||||
|
luks.LUKS)):
|
||||||
|
raise ValueError(('partobj must be of type aif.disk.block.Partition, '
|
||||||
|
'aif.disk.block.Disk, or aif.disk.mdadm.Array'))
|
||||||
|
self.devpath = self.device.devpath
|
||||||
|
self.is_superblocked = None
|
||||||
|
self.superblock = None
|
||||||
|
self._parseDeviceBlock()
|
||||||
|
|
||||||
|
def _parseDeviceBlock(self):
|
||||||
|
# I can't believe the mdstat module doesn't really have a way to do this.
|
||||||
|
super = subprocess.run(['mdadm', '--examine', self.devpath],
|
||||||
|
stdout = subprocess.PIPE,
|
||||||
|
stderr = subprocess.PIPE)
|
||||||
|
if super.returncode != 0:
|
||||||
|
# TODO: logging?
|
||||||
|
self.is_superblocked = False
|
||||||
|
return(None)
|
||||||
|
block = {}
|
||||||
|
for idx, line in enumerate(super.stdout.decode('utf-8').splitlines()):
|
||||||
|
line = line.strip()
|
||||||
|
if idx == 0: # This is just the same as self.device.devpath.
|
||||||
|
continue
|
||||||
|
if line == '':
|
||||||
|
continue
|
||||||
|
k, v = [i.strip() for i in line.split(':', 1)]
|
||||||
|
orig_k = k
|
||||||
|
k = re.sub(r'\s+', '_', k.lower())
|
||||||
|
if k in ('raid_devices', 'events'):
|
||||||
|
v = int(v)
|
||||||
|
elif k == 'magic':
|
||||||
|
v = bytes.fromhex(v)
|
||||||
|
elif k == 'name':
|
||||||
|
# TODO: Will this *always* give 2 values?
|
||||||
|
name, local_to = [i.strip() for i in v.split(None, 1)]
|
||||||
|
local_to = re.sub(r'[()]', '', local_to)
|
||||||
|
v = (name, local_to)
|
||||||
|
elif k == 'raid_level':
|
||||||
|
v = re.sub(r'^raid', '', v)
|
||||||
|
elif k == 'checksum':
|
||||||
|
cksum, status = [i.strip() for i in v.split('-')]
|
||||||
|
v = (bytes.fromhex(cksum), status)
|
||||||
|
elif k == 'unused_space':
|
||||||
|
r = _mdblock_unused_re.search(v)
|
||||||
|
if not r:
|
||||||
|
raise ValueError(('Could not parse {0} for '
|
||||||
|
'{1}\'s superblock').format(orig_k,
|
||||||
|
self.devpath))
|
||||||
|
v = {}
|
||||||
|
for i in ('before', 'after'):
|
||||||
|
v[i] = int(r.group(i)) # in sectors
|
||||||
|
elif k == 'bad_block_log':
|
||||||
|
k = 'badblock_log_entries'
|
||||||
|
r = _mdblock_badblock_re.search(v)
|
||||||
|
if not r:
|
||||||
|
raise ValueError(('Could not parse {0} for '
|
||||||
|
'{1}\'s superblock').format(orig_k,
|
||||||
|
self.devpath))
|
||||||
|
v = {}
|
||||||
|
for i in ('entries', 'offset'):
|
||||||
|
v[i] = int(r.group(i)) # offset is in sectors
|
||||||
|
elif k == 'array_state':
|
||||||
|
v = [i.strip() for i in v.split(None, 1)][0].split()
|
||||||
|
elif k == 'device_uuid':
|
||||||
|
v = uuid.UUID(hex = v.replace(':', '-'))
|
||||||
|
elif re.search((r'^(creation|update)_time$'), k):
|
||||||
|
# TODO: Is this portable/correct? Or do I need to do '%a %b %d %H:%M:%s %Y'?
|
||||||
|
v = datetime.datetime.strptime(v, '%c')
|
||||||
|
elif re.search(r'^((avail|used)_dev|array)_size$', k):
|
||||||
|
r = _mdblock_size_re.search(v)
|
||||||
|
if not r:
|
||||||
|
raise ValueError(('Could not parse {0} for '
|
||||||
|
'{1}\'s superblock').format(orig_k,
|
||||||
|
self.devpath))
|
||||||
|
v = {}
|
||||||
|
for i in ('sectors', 'GB', 'GiB'):
|
||||||
|
v[i] = float(r.group(i))
|
||||||
|
if i == 'sectors':
|
||||||
|
v[i] = int(v[i])
|
||||||
|
elif re.search(r'^(data|super)_offset$', k):
|
||||||
|
v = int(v.split(None, 1)[0])
|
||||||
|
block[k] = v
|
||||||
|
self.superblock = block
|
||||||
|
self.is_superblocked = True
|
||||||
|
return()
|
||||||
|
|
||||||
|
def prepare(self):
|
||||||
|
if self.is_superblocked:
|
||||||
|
# TODO: logging
|
||||||
|
subprocess.run(['mdadm', '--misc', '--zero-superblock', self.devpath])
|
||||||
|
self.is_superblocked = False
|
||||||
|
return()
|
||||||
|
|
||||||
|
class Array(object):
|
||||||
|
def __init__(self, array_xml, homehost, devpath = None):
|
||||||
|
self.xml = array_xml
|
||||||
|
self.id = array_xml.attrib['id']
|
||||||
|
self.level = int(self.xml.attrib['level'])
|
||||||
|
if self.level not in SUPPORTED_LEVELS:
|
||||||
|
raise ValueError('RAID level must be one of: {0}'.format(', '.join([str(i) for i in SUPPORTED_LEVELS])))
|
||||||
|
self.metadata = self.xml.attrib.get('meta', '1.2')
|
||||||
|
if self.metadata not in SUPPORTED_METADATA:
|
||||||
|
raise ValueError('Metadata version must be one of: {0}'.format(', '.join(SUPPORTED_METADATA)))
|
||||||
|
self.chunksize = int(self.xml.attrib.get('chunkSize', 512))
|
||||||
|
if self.level in (4, 5, 6, 10):
|
||||||
|
if not _itTakesTwo(self.chunksize):
|
||||||
|
# TODO: log.warn instead of raise exception? Will mdadm lose its marbles if it *isn't* a proper number?
|
||||||
|
raise ValueError('chunksize must be a power of 2 for the RAID level you specified')
|
||||||
|
if self.level in (0, 4, 5, 6, 10):
|
||||||
|
if not _safeChunks(self.chunksize):
|
||||||
|
# TODO: log.warn instead of raise exception? Will mdadm lose its marbles if it *isn't* a proper number?
|
||||||
|
raise ValueError('chunksize must be divisible by 4 for the RAID level you specified')
|
||||||
|
self.layout = self.xml.attrib.get('layout', 'none')
|
||||||
|
if self.level in SUPPORTED_LAYOUTS.keys():
|
||||||
|
matcher, layout_default = SUPPORTED_LAYOUTS[self.level]
|
||||||
|
if not matcher.search(self.layout):
|
||||||
|
if layout_default:
|
||||||
|
self.layout = layout_default
|
||||||
|
else:
|
||||||
|
self.layout = None # TODO: log.warn?
|
||||||
|
else:
|
||||||
|
self.layout = None
|
||||||
|
self.devname = self.xml.attrib['name']
|
||||||
|
self.devpath = devpath
|
||||||
|
self.updateStatus()
|
||||||
|
self.homehost = homehost
|
||||||
|
self.members = []
|
||||||
|
self.state = None
|
||||||
|
self.info = None
|
||||||
|
|
||||||
|
def addMember(self, memberobj):
|
||||||
|
if not isinstance(memberobj, Member):
|
||||||
|
raise ValueError('memberobj must be of type aif.disk.mdadm.Member')
|
||||||
|
memberobj.prepare()
|
||||||
|
self.members.append(memberobj)
|
||||||
|
return()
|
||||||
|
|
||||||
|
def start(self, scan = False):
|
||||||
|
if not any((self.members, self.devpath)):
|
||||||
|
raise RuntimeError('Cannot assemble an array with no members (for hints) or device path')
|
||||||
|
cmd = ['mdadm', '--assemble', self.devpath]
|
||||||
|
if not scan:
|
||||||
|
for m in self.members:
|
||||||
|
cmd.append(m.devpath)
|
||||||
|
else:
|
||||||
|
cmd.append('--scan')
|
||||||
|
# TODO: logging!
|
||||||
|
subprocess.run(cmd)
|
||||||
|
self.state = 'assembled'
|
||||||
|
return()
|
||||||
|
|
||||||
|
def create(self):
|
||||||
|
if not self.members:
|
||||||
|
raise RuntimeError('Cannot create an array with no members')
|
||||||
|
cmd = ['mdadm', '--create',
|
||||||
|
'--level={0}'.format(self.level),
|
||||||
|
'--metadata={0}'.format(self.metadata),
|
||||||
|
'--chunk={0}'.format(self.chunksize),
|
||||||
|
'--homehost={0}'.format(self.homehost),
|
||||||
|
'--raid-devices={0}'.format(len(self.members))]
|
||||||
|
if self.layout:
|
||||||
|
cmd.append('--layout={0}'.format(self.layout))
|
||||||
|
cmd.append(self.devpath)
|
||||||
|
for m in self.members:
|
||||||
|
cmd.append(m.devpath)
|
||||||
|
# TODO: logging!
|
||||||
|
subprocess.run(cmd)
|
||||||
|
self.writeConf()
|
||||||
|
self.state = 'new'
|
||||||
|
return()
|
||||||
|
|
||||||
|
def stop(self):
|
||||||
|
# TODO: logging
|
||||||
|
subprocess.run(['mdadm', '--stop', self.devpath])
|
||||||
|
self.state = 'disassembled'
|
||||||
|
return()
|
||||||
|
|
||||||
|
def updateStatus(self):
|
||||||
|
_info = mdstat.parse()
|
||||||
|
for k, v in _info['devices'].items():
|
||||||
|
if k != self.devname:
|
||||||
|
del(_info['devices'][k])
|
||||||
|
self.info = copy.deepcopy(_info)
|
||||||
|
return()
|
||||||
|
|
||||||
|
def writeConf(self, conf = '/etc/mdadm.conf'):
|
||||||
|
with open(conf, 'r') as fh:
|
||||||
|
conflines = fh.read().splitlines()
|
||||||
|
# TODO: logging
|
||||||
|
arrayinfo = subprocess.run(['mdadm', '--detail', '--brief', self.devpath],
|
||||||
|
stdout = subprocess.PIPE).stdout.decode('utf-8').strip()
|
||||||
|
if arrayinfo not in conflines:
|
||||||
|
r = re.compile(r'^ARRAY\s+{0}'.format(self.devpath))
|
||||||
|
nodev = True
|
||||||
|
for l in conflines:
|
||||||
|
if r.search(l):
|
||||||
|
nodev = False
|
||||||
|
# TODO: logging?
|
||||||
|
# and/or Raise an exception here;
|
||||||
|
# an array already exists with that name but not with the same opts/GUID/etc.
|
||||||
|
break
|
||||||
|
if nodev:
|
||||||
|
with open(conf, 'a') as fh:
|
||||||
|
fh.write('{0}\n'.format(arrayinfo))
|
||||||
|
return()
|
||||||
Loading…
Reference in New Issue
Block a user