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populator.py
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populator.py
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# populator.py
# Backend code for populating a DeviceTree.
#
# Copyright (C) 2009-2015 Red Hat, Inc.
#
# This copyrighted material is made available to anyone wishing to use,
# modify, copy, or redistribute it subject to the terms and conditions of
# the GNU Lesser General Public License v.2, or (at your option) any later
# version. This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY expressed or implied, including the implied
# warranties of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See
# the GNU Lesser General Public License for more details. You should have
# received a copy of the GNU Lesser General Public License along with this
# program; if not, write to the Free Software Foundation, Inc., 51 Franklin
# Street, Fifth Floor, Boston, MA 02110-1301, USA. Any Red Hat trademarks
# that are incorporated in the source code or documentation are not subject
# to the GNU Lesser General Public License and may only be used or
# replicated with the express permission of Red Hat, Inc.
#
# Red Hat Author(s): David Lehman <dlehman@redhat.com>
#
import os
import re
import shutil
import pprint
import copy
import parted
from gi.repository import BlockDev as blockdev
from .errors import CorruptGPTError, DeviceError, DeviceTreeError, DiskLabelScanError, DuplicateVGError, FSError, InvalidDiskLabelError, LUKSError
from .devices import BTRFSSubVolumeDevice, BTRFSVolumeDevice, BTRFSSnapShotDevice
from .devices import DASDDevice, DMDevice, DMLinearDevice, DMRaidArrayDevice, DiskDevice
from .devices import FcoeDiskDevice, FileDevice, LoopDevice, LUKSDevice
from .devices import LVMLogicalVolumeDevice, LVMVolumeGroupDevice
from .devices import LVMThinPoolDevice, LVMThinLogicalVolumeDevice
from .devices import LVMSnapShotDevice, LVMThinSnapShotDevice
from .devices import MDRaidArrayDevice, MDBiosRaidArrayDevice
from .devices import MDContainerDevice
from .devices import MultipathDevice, OpticalDevice
from .devices import PartitionDevice, ZFCPDiskDevice, iScsiDiskDevice
from .devices import devicePathToName
from .devices.lvm import get_internal_lv_class
from . import formats
from .devicelibs import lvm
from .devicelibs import raid
from . import udev
from . import util
from .flags import flags
from .storage_log import log_exception_info, log_method_call
from .i18n import _
from .size import Size
import logging
log = logging.getLogger("blivet")
def parted_exn_handler(exn_type, exn_options, exn_msg):
""" Answer any of parted's yes/no questions in the affirmative.
This allows us to proceed with partially corrupt gpt disklabels.
"""
log.info("parted exception: %s", exn_msg)
ret = parted.EXCEPTION_RESOLVE_UNHANDLED
if exn_type == parted.EXCEPTION_TYPE_ERROR and \
exn_options == parted.EXCEPTION_OPT_YES_NO:
ret = parted.EXCEPTION_RESOLVE_YES
return ret
class Populator(object):
def __init__(self, devicetree=None, conf=None, passphrase=None,
luksDict=None, iscsi=None, dasd=None):
"""
:keyword conf: storage discovery configuration
:type conf: :class:`~.StorageDiscoveryConfig`
:keyword passphrase: default LUKS passphrase
:keyword luksDict: a dict with UUID keys and passphrase values
:type luksDict: dict
:keyword iscsi: ISCSI control object
:type iscsi: :class:`~.iscsi.iscsi`
:keyword dasd: DASD control object
:type dasd: :class:`~.dasd.DASD`
"""
self.devicetree = devicetree
# indicates whether or not the tree has been fully populated
self.populated = False
self.exclusiveDisks = getattr(conf, "exclusiveDisks", [])
self.ignoredDisks = getattr(conf, "ignoredDisks", [])
self.iscsi = iscsi
self.dasd = dasd
self.diskImages = {}
images = getattr(conf, "diskImages", {})
if images:
# this will overwrite self.exclusiveDisks
self.setDiskImages(images)
# protected device specs as provided by the user
self.protectedDevSpecs = getattr(conf, "protectedDevSpecs", [])
self.liveBackingDevice = None
# names of protected devices at the time of tree population
self.protectedDevNames = []
self.unusedRaidMembers = []
self.__passphrases = []
if passphrase:
self.__passphrases.append(passphrase)
self.__luksDevs = {}
if luksDict and isinstance(luksDict, dict):
self.__luksDevs = luksDict
self.__passphrases.extend([p for p in luksDict.values() if p])
self._cleanup = False
def setDiskImages(self, images):
""" Set the disk images and reflect them in exclusiveDisks.
:param images: dict with image name keys and filename values
:type images: dict
.. note::
Disk images are automatically exclusive. That means that, in the
presence of disk images, any local storage not associated with
the disk images is ignored.
"""
self.diskImages = images
# disk image files are automatically exclusive
self.exclusiveDisks = list(self.diskImages.keys())
def addIgnoredDisk(self, disk):
self.ignoredDisks.append(disk)
lvm.lvm_cc_addFilterRejectRegexp(disk)
def isIgnored(self, info):
""" Return True if info is a device we should ignore.
:param info: udevdb device entry
:type info: dict
:returns: whether the device will be ignored
:rtype: bool
"""
sysfs_path = udev.device_get_sysfs_path(info)
name = udev.device_get_name(info)
if not sysfs_path:
return None
# Special handling for mdraid external metadata sets (mdraid BIOSRAID):
# 1) The containers are intermediate devices which will never be
# in exclusiveDisks
# 2) Sets get added to exclusive disks with their dmraid set name by
# the filter ui. Note that making the ui use md names instead is not
# possible as the md names are simpy md# and we cannot predict the #
if udev.device_is_md(info) and \
udev.device_get_md_level(info) == "container":
return False
if udev.device_get_md_container(info) and \
udev.device_is_md(info) and \
udev.device_get_md_name(info):
md_name = udev.device_get_md_name(info)
# mdadm may have appended _<digit>+ if the current hostname
# does not match the one in the array metadata
alt_name = re.sub(r"_\d+$", "", md_name)
raw_pattern = "isw_[a-z]*_%s"
# XXX FIXME: This is completely insane.
for i in range(0, len(self.exclusiveDisks)):
if re.match(raw_pattern % md_name, self.exclusiveDisks[i]) or \
re.match(raw_pattern % alt_name, self.exclusiveDisks[i]):
self.exclusiveDisks[i] = name
return False
# never ignore mapped disk images. if you don't want to use them,
# don't specify them in the first place
if udev.device_is_dm_anaconda(info) or udev.device_is_dm_livecd(info):
return False
# Ignore loop and ram devices, we normally already skip these in
# udev.py: enumerate_block_devices(), but we can still end up trying
# to add them to the tree when they are slaves of other devices, this
# happens for example with the livecd
if name.startswith("ram"):
return True
if name.startswith("loop"):
# ignore loop devices unless they're backed by a file
return (not blockdev.loop.get_backing_file(name))
# FIXME: check for virtual devices whose slaves are on the ignore list
def _isIgnoredDisk(self, disk):
return self.devicetree._isIgnoredDisk(disk)
def udevDeviceIsDisk(self, info):
""" Return True if the udev device looks like a disk.
:param info: udevdb device entry
:type info: dict
:returns: whether the device is a disk
:rtype: bool
We want exclusiveDisks to operate on anything that could be
considered a directly usable disk, ie: fwraid array, mpath, or disk.
Unfortunately, since so many things are represented as disks by
udev/sysfs, we have to define what is a disk in terms of what is
not a disk.
"""
return (udev.device_is_disk(info) and
not (udev.device_is_cdrom(info) or
udev.device_is_partition(info) or
udev.device_is_dm_partition(info) or
udev.device_is_dm_lvm(info) or
udev.device_is_dm_crypt(info) or
(udev.device_is_md(info) and
not udev.device_get_md_container(info))))
def _addSlaveDevices(self, info):
""" Add all slaves of a device, raising DeviceTreeError on failure.
:param :class:`pyudev.Device` info: the device's udev info
:raises: :class:`~.errors.DeviceTreeError if no slaves are found or
if we fail to add any slave
:returns: a list of slave devices
:rtype: list of :class:`~.StorageDevice`
"""
name = udev.device_get_name(info)
sysfs_path = udev.device_get_sysfs_path(info)
slave_dir = os.path.normpath("%s/slaves" % sysfs_path)
slave_names = os.listdir(slave_dir)
slave_devices = []
if not slave_names:
log.error("no slaves found for %s", name)
raise DeviceTreeError("no slaves found for device %s" % name)
for slave_name in slave_names:
path = os.path.normpath("%s/%s" % (slave_dir, slave_name))
slave_info = udev.get_device(os.path.realpath(path))
# cciss in sysfs is "cciss!cXdYpZ" but we need "cciss/cXdYpZ"
slave_name = udev.device_get_name(slave_info).replace("!", "/")
if not slave_info:
log.warning("unable to get udev info for %s", slave_name)
slave_dev = self.getDeviceByName(slave_name)
if not slave_dev and slave_info:
# we haven't scanned the slave yet, so do it now
self.addUdevDevice(slave_info)
slave_dev = self.getDeviceByName(slave_name)
if slave_dev is None:
if udev.device_is_dm_lvm(info):
if slave_name not in self.devicetree.lvInfo:
# we do not expect hidden lvs to be in the tree
continue
# if the current slave is still not in
# the tree, something has gone wrong
log.error("failure scanning device %s: could not add slave %s", name, slave_name)
msg = "failed to add slave %s of device %s" % (slave_name,
name)
raise DeviceTreeError(msg)
slave_devices.append(slave_dev)
return slave_devices
def addUdevLVDevice(self, info):
name = udev.device_get_name(info)
log_method_call(self, name=name)
vg_name = udev.device_get_lv_vg_name(info)
device = self.getDeviceByName(vg_name, hidden=True)
if device and not isinstance(device, LVMVolumeGroupDevice):
log.warning("found non-vg device with name %s", vg_name)
device = None
self._addSlaveDevices(info)
# LVM provides no means to resolve conflicts caused by duplicated VG
# names, so we're just being optimistic here. Woo!
vg_name = udev.device_get_lv_vg_name(info)
vg_device = self.getDeviceByName(vg_name)
if not vg_device:
log.error("failed to find vg '%s' after scanning pvs", vg_name)
return self.getDeviceByName(name)
def addUdevDMDevice(self, info):
name = udev.device_get_name(info)
log_method_call(self, name=name)
sysfs_path = udev.device_get_sysfs_path(info)
slave_devices = self._addSlaveDevices(info)
device = self.getDeviceByName(name)
# if this is a luks device whose map name is not what we expect,
# fix up the map name and see if that sorts us out
handle_luks = (udev.device_is_dm_luks(info) and
(self._cleanup or not flags.installer_mode))
if device is None and handle_luks and slave_devices:
slave_dev = slave_devices[0]
slave_dev.format.mapName = name
slave_info = udev.get_device(slave_dev.sysfsPath)
self.handleUdevLUKSFormat(slave_info, slave_dev)
# try once more to get the device
device = self.getDeviceByName(name)
# create a device for the livecd OS image(s)
if device is None and udev.device_is_dm_livecd(info):
device = DMDevice(name, dmUuid=info.get('DM_UUID'),
sysfsPath=sysfs_path, exists=True,
parents=[slave_devices[0]])
device.protected = True
device.controllable = False
self.devicetree._addDevice(device)
# if we get here, we found all of the slave devices and
# something must be wrong -- if all of the slaves are in
# the tree, this device should be as well
if device is None:
lvm.lvm_cc_addFilterRejectRegexp(name)
log.warning("ignoring dm device %s", name)
return device
def addUdevMultiPathDevice(self, info):
name = udev.device_get_name(info)
log_method_call(self, name=name)
slave_devices = self._addSlaveDevices(info)
device = None
if slave_devices:
try:
serial = info["DM_UUID"].split("-", 1)[1]
except (IndexError, AttributeError):
log.error("multipath device %s has no DM_UUID", name)
raise DeviceTreeError("multipath %s has no DM_UUID" % name)
device = MultipathDevice(name, parents=slave_devices,
sysfsPath=udev.device_get_sysfs_path(info),
serial=serial)
self.devicetree._addDevice(device)
return device
def addUdevMDDevice(self, info):
name = udev.device_get_md_name(info)
log_method_call(self, name=name)
self._addSlaveDevices(info)
# try to get the device again now that we've got all the slaves
device = self.getDeviceByName(name, incomplete=flags.allow_imperfect_devices)
if device is None:
try:
uuid = udev.device_get_md_uuid(info)
except KeyError:
log.warning("failed to obtain uuid for mdraid device")
else:
device = self.getDeviceByUuid(uuid, incomplete=flags.allow_imperfect_devices)
if device:
# update the device instance with the real name in case we had to
# look it up by something other than name
device.name = name
else:
# if we get here, we found all of the slave devices and
# something must be wrong -- if all of the slaves are in
# the tree, this device should be as well
if name is None:
name = udev.device_get_name(info)
path = "/dev/" + name
else:
path = "/dev/md/" + name
log.error("failed to scan md array %s", name)
try:
blockdev.md.deactivate(path)
except blockdev.MDRaidError:
log.error("failed to stop broken md array %s", name)
return device
def addUdevPartitionDevice(self, info, disk=None):
name = udev.device_get_name(info)
log_method_call(self, name=name)
sysfs_path = udev.device_get_sysfs_path(info)
if name.startswith("md"):
name = blockdev.md.name_from_node(name)
device = self.getDeviceByName(name)
if device:
return device
if disk is None:
disk_name = os.path.basename(os.path.dirname(sysfs_path))
disk_name = disk_name.replace('!','/')
if disk_name.startswith("md"):
disk_name = blockdev.md.name_from_node(disk_name)
disk = self.getDeviceByName(disk_name)
if disk is None:
# create a device instance for the disk
new_info = udev.get_device(os.path.dirname(sysfs_path))
if new_info:
self.addUdevDevice(new_info)
disk = self.getDeviceByName(disk_name)
if disk is None:
# if the current device is still not in
# the tree, something has gone wrong
log.error("failure scanning device %s", disk_name)
lvm.lvm_cc_addFilterRejectRegexp(name)
return
if not disk.partitioned:
# Ignore partitions on:
# - devices we do not support partitioning of, like logical volumes
# - devices that do not have a usable disklabel
# - devices that contain disklabels made by isohybrid
#
if disk.partitionable and \
disk.format.type != "iso9660" and \
not disk.format.hidden and \
not self._isIgnoredDisk(disk):
if info.get("ID_PART_TABLE_TYPE") == "gpt":
msg = "corrupt gpt disklabel on disk %s" % disk.name
cls = CorruptGPTError
else:
msg = "failed to scan disk %s" % disk.name
cls = DiskLabelScanError
raise cls(msg)
# there's no need to filter partitions on members of multipaths or
# fwraid members from lvm since multipath and dmraid are already
# active and lvm should therefore know to ignore them
if not disk.format.hidden:
lvm.lvm_cc_addFilterRejectRegexp(name)
log.debug("ignoring partition %s on %s", name, disk.format.type)
return
device = None
try:
device = PartitionDevice(name, sysfsPath=sysfs_path,
major=udev.device_get_major(info),
minor=udev.device_get_minor(info),
exists=True, parents=[disk])
except DeviceError as e:
# corner case sometime the kernel accepts a partition table
# which gets rejected by parted, in this case we will
# prompt to re-initialize the disk, so simply skip the
# faulty partitions.
# XXX not sure about this
log.error("Failed to instantiate PartitionDevice: %s", e)
return
self.devicetree._addDevice(device)
return device
def addUdevDiskDevice(self, info):
name = udev.device_get_name(info)
log_method_call(self, name=name)
sysfs_path = udev.device_get_sysfs_path(info)
serial = udev.device_get_serial(info)
bus = udev.device_get_bus(info)
vendor = util.get_sysfs_attr(sysfs_path, "device/vendor")
model = util.get_sysfs_attr(sysfs_path, "device/model")
kwargs = { "serial": serial, "vendor": vendor, "model": model, "bus": bus }
if udev.device_is_iscsi(info):
diskType = iScsiDiskDevice
initiator = udev.device_get_iscsi_initiator(info)
target = udev.device_get_iscsi_name(info)
address = udev.device_get_iscsi_address(info)
port = udev.device_get_iscsi_port(info)
nic = udev.device_get_iscsi_nic(info)
kwargs["initiator"] = initiator
if initiator == self.iscsi.initiator:
node = self.iscsi.getNode(target, address, port, nic)
kwargs["node"] = node
kwargs["ibft"] = node in self.iscsi.ibftNodes
kwargs["nic"] = self.iscsi.ifaces.get(node.iface, node.iface)
log.info("%s is an iscsi disk", name)
else:
# qla4xxx partial offload
kwargs["node"] = None
kwargs["ibft"] = False
kwargs["nic"] = "offload:not_accessible_via_iscsiadm"
kwargs["fw_address"] = address
kwargs["fw_port"] = port
kwargs["fw_name"] = name
elif udev.device_is_fcoe(info):
diskType = FcoeDiskDevice
kwargs["nic"] = udev.device_get_fcoe_nic(info)
kwargs["identifier"] = udev.device_get_fcoe_identifier(info)
log.info("%s is an fcoe disk", name)
elif udev.device_get_md_container(info):
name = udev.device_get_md_name(info)
diskType = MDBiosRaidArrayDevice
parentPath = udev.device_get_md_container(info)
parentName = devicePathToName(parentPath)
container = self.getDeviceByName(parentName)
if not container:
parentSysName = blockdev.md.node_from_name(parentName)
container_sysfs = "/sys/class/block/" + parentSysName
container_info = udev.get_device(container_sysfs)
if not container_info:
log.error("failed to find md container %s at %s",
parentName, container_sysfs)
return
self.addUdevDevice(container_info)
container = self.getDeviceByName(parentName)
if not container:
log.error("failed to scan md container %s", parentName)
return
kwargs["parents"] = [container]
kwargs["level"] = udev.device_get_md_level(info)
kwargs["memberDevices"] = udev.device_get_md_devices(info)
kwargs["uuid"] = udev.device_get_md_uuid(info)
kwargs["exists"] = True
del kwargs["serial"]
del kwargs["vendor"]
del kwargs["bus"]
elif udev.device_is_dasd(info):
diskType = DASDDevice
kwargs["busid"] = udev.device_get_dasd_bus_id(info)
kwargs["opts"] = {}
for attr in ['readonly', 'use_diag', 'erplog', 'failfast']:
kwargs["opts"][attr] = udev.device_get_dasd_flag(info, attr)
log.info("%s is a dasd device", name)
elif udev.device_is_zfcp(info):
diskType = ZFCPDiskDevice
for attr in ['hba_id', 'wwpn', 'fcp_lun']:
kwargs[attr] = udev.device_get_zfcp_attribute(info, attr=attr)
log.info("%s is a zfcp device", name)
else:
diskType = DiskDevice
log.info("%s is a disk", name)
device = diskType(name,
major=udev.device_get_major(info),
minor=udev.device_get_minor(info),
sysfsPath=sysfs_path, **kwargs)
if diskType == DASDDevice:
self.dasd.append(device)
self.devicetree._addDevice(device)
return device
def addUdevOpticalDevice(self, info):
log_method_call(self)
# XXX should this be RemovableDevice instead?
#
# Looks like if it has ID_INSTANCE=0:1 we can ignore it.
device = OpticalDevice(udev.device_get_name(info),
major=udev.device_get_major(info),
minor=udev.device_get_minor(info),
sysfsPath=udev.device_get_sysfs_path(info),
vendor=udev.device_get_vendor(info),
model=udev.device_get_model(info))
self.devicetree._addDevice(device)
return device
def addUdevLoopDevice(self, info):
name = udev.device_get_name(info)
log_method_call(self, name=name)
sysfs_path = udev.device_get_sysfs_path(info)
sys_file = "%s/loop/backing_file" % sysfs_path
backing_file = open(sys_file).read().strip()
file_device = self.getDeviceByName(backing_file)
if not file_device:
file_device = FileDevice(backing_file, exists=True)
self.devicetree._addDevice(file_device)
device = LoopDevice(name,
parents=[file_device],
sysfsPath=sysfs_path,
exists=True)
if not self._cleanup or file_device not in self.diskImages.values():
# don't allow manipulation of loop devices other than those
# associated with disk images, and then only during cleanup
file_device.controllable = False
device.controllable = False
self.devicetree._addDevice(device)
return device
def addUdevDevice(self, info):
name = udev.device_get_name(info)
log_method_call(self, name=name, info=pprint.pformat(dict(info)))
uuid = udev.device_get_uuid(info)
sysfs_path = udev.device_get_sysfs_path(info)
# make sure this device was not scheduled for removal and also has not
# been hidden
removed = [a.device for a in self.devicetree.actions.find(
action_type="destroy",
object_type="device")]
for ignored in removed + self.devicetree._hidden:
if (sysfs_path and ignored.sysfsPath == sysfs_path) or \
(uuid and uuid in (ignored.uuid, ignored.format.uuid)):
if ignored in removed:
reason = "removed"
else:
reason = "hidden"
log.debug("skipping %s device %s", reason, name)
return
# make sure we note the name of every device we see
if name not in self.names:
self.names.append(name)
if self.isIgnored(info):
log.info("ignoring %s (%s)", name, sysfs_path)
if name not in self.ignoredDisks:
self.addIgnoredDisk(name)
return
log.info("scanning %s (%s)...", name, sysfs_path)
device = self.getDeviceByName(name)
if device is None and udev.device_is_md(info):
# If the md name is None, then some udev info is missing. Likely,
# this is because the array is degraded, and mdadm has deactivated
# it. Try to activate it and re-get the udev info.
if flags.allow_imperfect_devices and udev.device_get_md_name(info) is None:
devname = udev.device_get_devname(info)
if devname:
try:
blockdev.md.run(devname)
except blockdev.MDRaidError as e:
log.warning("Failed to start possibly degraded md array: %s", e)
else:
udev.settle()
info = udev.get_device(sysfs_path)
else:
log.warning("Failed to get devname for possibly degraded md array.")
md_name = udev.device_get_md_name(info)
if md_name is None:
log.warning("No name for possibly degraded md array.")
else:
device = self.getDeviceByName(md_name, incomplete=flags.allow_imperfect_devices)
if device and not isinstance(device, MDRaidArrayDevice):
log.warning("Found device %s, but it turns out not be an md array device after all.", device.name)
device = None
if device and device.isDisk and \
blockdev.mpath.is_mpath_member(device.path):
# newly added device (eg iSCSI) could make this one a multipath member
if device.format and device.format.type != "multipath_member":
log.debug("%s newly detected as multipath member, dropping old format and removing kids", device.name)
# remove children from tree so that we don't stumble upon them later
for child in self.devicetree.getChildren(device):
self.devicetree.recursiveRemove(child, actions=False)
device.format = None
#
# The first step is to either look up or create the device
#
device_added = True
if device:
device_added = False
elif udev.device_is_loop(info):
log.info("%s is a loop device", name)
device = self.addUdevLoopDevice(info)
elif udev.device_is_dm_mpath(info) and \
not udev.device_is_dm_partition(info):
log.info("%s is a multipath device", name)
device = self.addUdevMultiPathDevice(info)
elif udev.device_is_dm_lvm(info):
log.info("%s is an lvm logical volume", name)
device = self.addUdevLVDevice(info)
elif udev.device_is_dm(info):
log.info("%s is a device-mapper device", name)
device = self.addUdevDMDevice(info)
elif udev.device_is_md(info) and not udev.device_get_md_container(info):
log.info("%s is an md device", name)
device = self.addUdevMDDevice(info)
elif udev.device_is_cdrom(info):
log.info("%s is a cdrom", name)
device = self.addUdevOpticalDevice(info)
elif udev.device_is_disk(info):
device = self.addUdevDiskDevice(info)
elif udev.device_is_partition(info):
log.info("%s is a partition", name)
device = self.addUdevPartitionDevice(info)
else:
log.error("Unknown block device type for: %s", name)
return
if not device:
log.debug("no device obtained for %s", name)
return
# If this device is read-only, mark it as such now.
if self.udevDeviceIsDisk(info) and \
util.get_sysfs_attr(udev.device_get_sysfs_path(info), 'ro') == '1':
device.readonly = True
# If this device is protected, mark it as such now. Once the tree
# has been populated, devices' protected attribute is how we will
# identify protected devices.
if device.name in self.protectedDevNames:
device.protected = True
# if this is the live backing device we want to mark its parents
# as protected also
if device.name == self.liveBackingDevice:
for parent in device.parents:
parent.protected = True
# If we just added a multipath or fwraid disk that is in exclusiveDisks
# we have to make sure all of its members are in the list too.
mdclasses = (DMRaidArrayDevice, MDRaidArrayDevice, MultipathDevice)
if device.isDisk and isinstance(device, mdclasses):
if device.name in self.exclusiveDisks:
for parent in device.parents:
if parent.name not in self.exclusiveDisks:
self.exclusiveDisks.append(parent.name)
log.info("got device: %r", device)
# now handle the device's formatting
self.handleUdevDeviceFormat(info, device)
if device_added:
device.originalFormat = copy.copy(device.format)
device.deviceLinks = udev.device_get_symlinks(info)
def handleUdevDiskLabelFormat(self, info, device):
disklabel_type = udev.device_get_disklabel_type(info)
log_method_call(self, device=device.name, label_type=disklabel_type)
# if there is no disklabel on the device
# blkid doesn't understand dasd disklabels, so bypass for dasd
if disklabel_type is None and not \
(device.isDisk and udev.device_is_dasd(info)):
log.debug("device %s does not contain a disklabel", device.name)
return
if device.partitioned:
# this device is already set up
log.debug("disklabel format on %s already set up", device.name)
return
try:
device.setup()
except Exception: # pylint: disable=broad-except
log_exception_info(log.warning, "setup of %s failed, aborting disklabel handler", [device.name])
return
# special handling for unsupported partitioned devices
if not device.partitionable:
try:
fmt = formats.getFormat("disklabel",
device=device.path,
labelType=disklabel_type,
exists=True)
except InvalidDiskLabelError:
log.warning("disklabel detected but not usable on %s",
device.name)
else:
device.format = fmt
return
try:
fmt = formats.getFormat("disklabel",
device=device.path,
exists=True)
except InvalidDiskLabelError as e:
log.info("no usable disklabel on %s", device.name)
if disklabel_type == "gpt":
log.debug(e)
device.format = formats.getFormat(_("Invalid Disk Label"))
else:
device.format = fmt
def handleUdevLUKSFormat(self, info, device):
# pylint: disable=unused-argument
log_method_call(self, name=device.name, type=device.format.type)
if not device.format.uuid:
log.info("luks device %s has no uuid", device.path)
return
# look up or create the mapped device
if not self.getDeviceByName(device.format.mapName):
passphrase = self.__luksDevs.get(device.format.uuid)
if device.format.configured:
pass
elif passphrase:
device.format.passphrase = passphrase
elif device.format.uuid in self.__luksDevs:
log.info("skipping previously-skipped luks device %s",
device.name)
elif self._cleanup or flags.testing:
# if we're only building the devicetree so that we can
# tear down all of the devices we don't need a passphrase
if device.format.status:
# this makes device.configured return True
device.format.passphrase = 'yabbadabbadoo'
else:
# Try each known passphrase. Include luksDevs values in case a
# passphrase has been set for a specific device without a full
# reset/populate, in which case the new passphrase would not be
# in self.__passphrases.
for passphrase in self.__passphrases + list(self.__luksDevs.values()):
device.format.passphrase = passphrase
try:
device.format.setup()
except blockdev.BlockDevError:
device.format.passphrase = None
else:
break
luks_device = LUKSDevice(device.format.mapName,
parents=[device],
exists=True)
try:
luks_device.setup()
except (LUKSError, blockdev.CryptoError, DeviceError) as e:
log.info("setup of %s failed: %s", device.format.mapName, e)
device.removeChild()
else:
luks_device.updateSysfsPath()
self.devicetree._addDevice(luks_device)
else:
log.warning("luks device %s already in the tree",
device.format.mapName)
def handleVgLvs(self, vg_device):
""" Handle setup of the LV's in the vg_device. """
vg_name = vg_device.name
lv_info = dict((k, v) for (k, v) in iter(self.devicetree.lvInfo.items())
if v.vg_name == vg_name)
self.names.extend(n for n in lv_info.keys() if n not in self.names)
if not vg_device.complete:
log.warning("Skipping LVs for incomplete VG %s", vg_name)
return
if not lv_info:
log.debug("no LVs listed for VG %s", vg_name)
return
all_lvs = []
internal_lvs = []
def addRequiredLV(name, msg):
""" Add a prerequisite/parent LV.
The parent is strictly required in order to be able to add
some other LV that depends on it. For this reason, failure to
add the specified LV results in a DeviceTreeError with the
message string specified in the msg parameter.
:param str name: the full name of the LV (including vgname)
:param str msg: message to pass DeviceTreeError ctor on error
:returns: None
:raises: :class:`~.errors.DeviceTreeError` on failure
"""
vol = self.getDeviceByName(name)
if vol is None:
new_lv = addLV(lv_info[name])
if new_lv:
all_lvs.append(new_lv)
vol = self.getDeviceByName(name)
if vol is None:
log.error("%s: %s", msg, name)
raise DeviceTreeError(msg)
def addLV(lv):
""" Instantiate and add an LV based on data from the VG. """
lv_name = lv.lv_name
lv_uuid = lv.uuid
lv_attr = lv.attr
lv_size = Size(lv.size)
lv_type = lv.segtype
lv_class = LVMLogicalVolumeDevice
lv_parents = [vg_device]
lv_kwargs = {}
name = "%s-%s" % (vg_name, lv_name)
if self.getDeviceByName(name):
# some lvs may have been added on demand below
log.debug("already added %s", name)
return
if lv_attr[0] in 'Ss':
log.info("found lvm snapshot volume '%s'", name)
origin_name = blockdev.lvm.lvorigin(vg_name, lv_name)
if not origin_name:
log.error("lvm snapshot '%s-%s' has unknown origin",
vg_name, lv_name)
return
if origin_name.endswith("_vorigin]"):
lv_kwargs["vorigin"] = True
origin = None
else:
origin_device_name = "%s-%s" % (vg_name, origin_name)
addRequiredLV(origin_device_name,
"failed to locate origin lv")
origin = self.getDeviceByName(origin_device_name)
lv_kwargs["origin"] = origin
lv_class = LVMSnapShotDevice
elif lv_attr[0] == 'v':
# skip vorigins
return
elif lv_attr[0] in 'IielTCo' and lv_name.endswith(']'):
# an internal LV, add the an instance of the appropriate class
# to internal_lvs for later processing when non-internal LVs are
# processed
internal_lvs.append(lv_name)
return
elif lv_attr[0] == 't':
# thin pool
lv_class = LVMThinPoolDevice
elif lv_attr[0] == 'V':
# thin volume
pool_name = blockdev.lvm.thlvpoolname(vg_name, lv_name)
pool_device_name = "%s-%s" % (vg_name, pool_name)
addRequiredLV(pool_device_name, "failed to look up thin pool")
origin_name = blockdev.lvm.lvorigin(vg_name, lv_name)
if origin_name:
origin_device_name = "%s-%s" % (vg_name, origin_name)
addRequiredLV(origin_device_name, "failed to locate origin lv")
origin = self.getDeviceByName(origin_device_name)
lv_kwargs["origin"] = origin
lv_class = LVMThinSnapShotDevice
else:
lv_class = LVMThinLogicalVolumeDevice
lv_parents = [self.getDeviceByName(pool_device_name)]
elif lv_name.endswith(']'):
# unrecognized Internal LVM2 device
return
elif lv_attr[0] not in '-mMrRoOC':
# Ignore anything else except for the following:
# - normal lv
# m mirrored
# M mirrored without initial sync
# r raid
# R raid without initial sync
# o origin
# O origin with merging snapshot
# C cached LV
return
lv_dev = self.getDeviceByUuid(lv_uuid)
if lv_dev is None:
lv_device = lv_class(lv_name, parents=lv_parents,
uuid=lv_uuid, size=lv_size,segType=lv_type,
exists=True, **lv_kwargs)
self.devicetree._addDevice(lv_device)
if flags.installer_mode:
lv_device.setup()
if lv_device.status:
lv_device.updateSysfsPath()
lv_device.updateSize()
lv_info = udev.get_device(lv_device.sysfsPath)
if not lv_info:
log.error("failed to get udev data for lv %s", lv_device.name)
return lv_device
# do format handling now
self.addUdevDevice(lv_info)
return lv_device
return None
def createInternalLV(lv):