548 lines
19 KiB
Python
548 lines
19 KiB
Python
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#
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# Viewer of the device tree
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#
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# Copyright (C) 2019 Red Hat, Inc.
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#
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# This copyrighted material is made available to anyone wishing to use,
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# modify, copy, or redistribute it subject to the terms and conditions of
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# the GNU General Public License v.2, or (at your option) any later version.
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# This program is distributed in the hope that it will be useful, but WITHOUT
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# ANY WARRANTY expressed or implied, including the implied warranties of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General
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# Public License for more details. You should have received a copy of the
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# GNU General Public License along with this program; if not, write to the
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# Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
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# 02110-1301, USA. Any Red Hat trademarks that are incorporated in the
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# source code or documentation are not subject to the GNU General Public
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# License and may only be used or replicated with the express permission of
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# Red Hat, Inc.
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#
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from abc import abstractmethod, ABC
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from functools import partial
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from blivet.formats import get_format
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from blivet.size import Size
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from pyanaconda.anaconda_loggers import get_module_logger
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from pyanaconda.core.i18n import _
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from pyanaconda.modules.common.errors.storage import UnknownDeviceError
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from pyanaconda.modules.common.structures.storage import DeviceData, DeviceActionData, \
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DeviceFormatData, OSData, MountPointConstraintsData
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from pyanaconda.modules.storage.devicetree.utils import get_required_device_size, \
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get_supported_filesystems
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from pyanaconda.modules.storage.platform import platform
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from pyanaconda.modules.storage.partitioning.specification import PartSpec
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log = get_module_logger(__name__)
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__all__ = ["DeviceTreeViewer"]
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class DeviceTreeViewer(ABC):
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"""The viewer of the device tree."""
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@property
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@abstractmethod
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def storage(self):
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"""The storage model.
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:return: an instance of Blivet
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"""
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return None
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def get_root_device(self):
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"""Get the root device.
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:return: a name of the root device
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"""
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device = self.storage.root_device
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return device.name if device else ""
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def get_devices(self):
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"""Get all devices in the device tree.
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:return: a list of device names
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"""
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return [d.name for d in self.storage.devices]
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def get_disks(self):
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"""Get all disks in the device tree.
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Ignored disks are excluded, as are disks with no media present.
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:return: a list of device names
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"""
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return [d.name for d in self.storage.disks]
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def get_mount_points(self):
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"""Get all mount points in the device tree.
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:return: a dictionary of mount points and device names
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"""
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return {
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mount_point: device.name
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for mount_point, device in self.storage.mountpoints.items()
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}
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def get_device_data(self, name):
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"""Get the device data.
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:param name: a device name
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:return: an instance of DeviceData
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:raise: UnknownDeviceError if the device is not found
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"""
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# Find the device.
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device = self._get_device(name)
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# Collect the device data.
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data = DeviceData()
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self._set_device_data(device, data)
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# Collect the specialized data.
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if device.type == "dasd":
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self._set_device_data_dasd(device, data)
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elif device.type == "fcoe":
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self._set_device_data_fcoe(device, data)
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elif device.type == "iscsi":
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self._set_device_data_iscsi(device, data)
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elif device.type == "nvme-fabrics":
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self._set_device_data_nvme_fabrics(device, data)
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elif device.type == "zfcp":
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self._set_device_data_zfcp(device, data)
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# Prune the attributes.
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data.attrs = self._prune_attributes(data.attrs)
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return data
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def _set_device_data(self, device, data):
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"""Set data for a device of any type."""
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data.type = device.type
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data.name = device.name
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data.path = device.path
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data.links = device.device_links
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data.size = device.size.get_bytes()
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data.parents = [d.name for d in device.parents]
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data.children = [d.name for d in device.children]
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data.is_disk = device.is_disk
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data.protected = device.protected
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data.removable = device.removable
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# FIXME: We should generate the description from the device data.
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data.description = getattr(device, "description", "")
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data.attrs["serial"] = self._get_attribute(device, "serial")
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data.attrs["vendor"] = self._get_attribute(device, "vendor")
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data.attrs["model"] = self._get_attribute(device, "model")
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data.attrs["bus"] = self._get_attribute(device, "bus")
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data.attrs["wwn"] = self._get_attribute(device, "wwn")
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data.attrs["uuid"] = self._get_attribute(device, "uuid")
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def _set_device_data_dasd(self, device, data):
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"""Set data for a DASD device."""
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data.attrs["bus-id"] = self._get_attribute(device, "busid")
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def _set_device_data_fcoe(self, device, data):
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"""Set data for an FCoE device."""
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data.attrs["path-id"] = self._get_attribute(device, "id_path")
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def _set_device_data_iscsi(self, device, data):
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"""Set data for an iSCSI device."""
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data.attrs["port"] = self._get_attribute(device, "port")
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data.attrs["initiator"] = self._get_attribute(device, "initiator")
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data.attrs["lun"] = self._get_attribute(device, "lun")
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data.attrs["target"] = self._get_attribute(device, "target")
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data.attrs["path-id"] = self._get_attribute(device, "id_path")
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def _set_device_data_nvme_fabrics(self, device, data):
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"""Set data for an NVMe Fabrics device."""
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data.attrs["nsid"] = self._get_attribute(device, "nsid")
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data.attrs["eui64"] = self._get_attribute(device, "eui64")
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data.attrs["nguid"] = self._get_attribute(device, "nguid")
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get_attrs = partial(self._get_attribute_list, device.controllers)
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data.attrs["controllers-id"] = get_attrs("id")
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data.attrs["transports-type"] = get_attrs("transport")
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data.attrs["transports-address"] = get_attrs("transport_address")
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data.attrs["subsystems-nqn"] = get_attrs("subsysnqn")
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def _set_device_data_zfcp(self, device, data):
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"""Set data for a ZFCP device."""
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data.attrs["fcp-lun"] = self._get_attribute(device, "fcp_lun")
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data.attrs["wwpn"] = self._get_attribute(device, "wwpn")
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data.attrs["hba-id"] = self._get_attribute(device, "hba_id")
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data.attrs["path-id"] = self._get_attribute(device, "id_path")
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def get_format_data(self, device_name):
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"""Get the device format data.
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Return data about a format of the specified device.
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For example: sda1
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:param device_name: a name of the device
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:return: an instance of DeviceFormatData
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"""
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device = self._get_device(device_name)
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return self._get_format_data(device.format)
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def _get_format_data(self, fmt):
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"""Get the format data.
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Retrieve data about a device format from
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the given format instance.
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:param fmt: an instance of DeviceFormat
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:return: an instance of DeviceFormatData
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"""
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# Collect the format data.
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data = DeviceFormatData()
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data.type = fmt.type or ""
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data.mountable = fmt.mountable
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data.formattable = fmt.formattable
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data.description = fmt.name or ""
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# Collect the additional attributes.
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data.attrs["has_key"] = self._get_attribute(fmt, "has_key")
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data.attrs["uuid"] = self._get_attribute(fmt, "uuid")
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data.attrs["label"] = self._get_attribute(fmt, "label")
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data.attrs["mount-point"] = self._get_attribute(fmt, "mountpoint")
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# Prune the attributes.
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data.attrs = self._prune_attributes(data.attrs)
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return data
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def get_format_type_data(self, format_name):
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"""Get the format type data.
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Return data about the specified format type.
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For example: ext4
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:param format_name: a name of the format type
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:return: an instance of DeviceFormatData
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"""
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fmt = get_format(format_name)
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return self._get_format_type_data(fmt)
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def _get_format_type_data(self, fmt):
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"""Get the format type data.
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Retrieve data about a format type from
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the given format instance.
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:param fmt: an instance of DeviceFormat
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:return: an instance of DeviceFormatData
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"""
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data = DeviceFormatData()
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data.type = fmt.type or ""
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data.mountable = fmt.mountable
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data.description = fmt.name or ""
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return data
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def _get_device(self, name):
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"""Find a device by its name.
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:param name: a name of the device
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:return: an instance of the Blivet's device
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:raise: UnknownDeviceError if no device is found
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"""
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device = self.storage.devicetree.get_device_by_name(
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name, hidden=True, incomplete=True
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)
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if not device:
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raise UnknownDeviceError(name)
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return device
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def _get_devices(self, names):
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"""Find devices by their names.
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:param names: names of the devices
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:return: a list of instances of the Blivet's device
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"""
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return list(map(self._get_device, names))
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def _get_attribute(self, obj, name):
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"""Get the attribute of the given object.
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If the attribute doesn't exist or it is not set,
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return None. Otherwise, return a string representation
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of the attribute value.
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:param obj: an object
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:param name: an attribute name
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:return: a string or None
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"""
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try:
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value = getattr(obj, name)
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except AttributeError:
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# Skip if the attribute doesn't exist.
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return None
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if value in (None, ""):
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# Skip it the attribute is not set.
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return None
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return str(value)
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def _get_attribute_list(self, iterable, name):
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"""Get a list of attributes of the given objects.
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Create a comma-separated list of sorted unique attribute values.
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See the _get_attribute method for more info.
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:param iterable: a list of objects
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:param name: an attribute name
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:return: a string or None
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"""
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# Collect values.
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values = [self._get_attribute(obj, name) for obj in iterable]
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# Skip duplicates and unset values.
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values = set(filter(None, values))
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# Format sorted values if any.
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return ", ".join(sorted(values)) or None
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def _prune_attributes(self, attrs):
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"""Prune the unset values of attributes.
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:param attrs: a dictionary of attributes
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:return: a pruned dictionary of attributes
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"""
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return {k: v for k, v in attrs.items() if v is not None}
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def get_actions(self):
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"""Get the device actions.
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The actions are pruned and sorted.
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:return: a list of DeviceActionData
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"""
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actions = []
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self.storage.devicetree.actions.prune()
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self.storage.devicetree.actions.sort()
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for action in self.storage.devicetree.actions.find():
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actions.append(self._get_action_data(action))
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return actions
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def _get_action_data(self, action):
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"""Get the action data.
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:param action: an instance of DeviceAction
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:return: an instance of DeviceActionData
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"""
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data = DeviceActionData()
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# Collect the action data.
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data.action_type = action.type_string.lower()
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data.action_description = action.type_desc
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# Collect the object data.
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data.object_type = action.object_string.lower()
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data.object_description = action.object_type_string
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# Collect the device data.
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device = action.device
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data.device_name = device.name
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if action.is_create or action.is_device or action.is_format:
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data.attrs["mount-point"] = self._get_attribute(action.format, "mountpoint")
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if getattr(device, "description", ""):
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data.attrs["serial"] = self._get_attribute(device, "serial")
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data.device_description = _("{device_description} ({device_name})").format(
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device_description=device.description,
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device_name=device.name
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)
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elif getattr(device, "disk", None):
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data.attrs["serial"] = self._get_attribute(device.disk, "serial")
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data.device_description = _("{device_name} on {container_name}").format(
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device_name=device.name,
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container_name=device.disk.description
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)
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else:
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data.attrs["serial"] = self._get_attribute(device, "serial")
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data.device_description = device.name
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# Prune the attributes.
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data.attrs = self._prune_attributes(data.attrs)
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return data
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def resolve_device(self, dev_spec):
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"""Get the device matching the provided device specification.
|
||
|
|
|
||
|
|
The spec can be anything from a device name (eg: 'sda3') to a
|
||
|
|
device node path (eg: '/dev/mapper/fedora-root') to something
|
||
|
|
like 'UUID=xyz-tuv-qrs' or 'LABEL=rootfs'.
|
||
|
|
|
||
|
|
If no device is found, return an empty string.
|
||
|
|
|
||
|
|
:param dev_spec: a string describing a block device
|
||
|
|
:return: a device name or an empty string
|
||
|
|
"""
|
||
|
|
device = self.storage.devicetree.resolve_device(dev_spec)
|
||
|
|
|
||
|
|
if not device:
|
||
|
|
return ""
|
||
|
|
|
||
|
|
return device.name
|
||
|
|
|
||
|
|
def get_ancestors(self, device_names):
|
||
|
|
"""Collect ancestors of the specified devices.
|
||
|
|
|
||
|
|
Ancestors of a device don't include the device itself.
|
||
|
|
The list is sorted by names of the devices.
|
||
|
|
|
||
|
|
:param device_names: a list of device names
|
||
|
|
:return: a list of device names
|
||
|
|
"""
|
||
|
|
devices = self._get_devices(device_names)
|
||
|
|
ancestors = set()
|
||
|
|
|
||
|
|
for device in devices:
|
||
|
|
for ancestor in device.ancestors:
|
||
|
|
if ancestor != device:
|
||
|
|
ancestors.add(ancestor.name)
|
||
|
|
|
||
|
|
return sorted(ancestors)
|
||
|
|
|
||
|
|
def get_supported_file_systems(self):
|
||
|
|
"""Get the supported types of filesystems.
|
||
|
|
|
||
|
|
:return: a list of filesystem names
|
||
|
|
"""
|
||
|
|
return get_supported_filesystems()
|
||
|
|
|
||
|
|
def get_required_device_size(self, required_space):
|
||
|
|
"""Get device size we need to get the required space on the device.
|
||
|
|
|
||
|
|
:param int required_space: a required space in bytes
|
||
|
|
:return int: a required device size in bytes
|
||
|
|
"""
|
||
|
|
return get_required_device_size(Size(required_space)).get_bytes()
|
||
|
|
|
||
|
|
def get_file_system_free_space(self, mount_points):
|
||
|
|
"""Get total file system free space on the given mount points.
|
||
|
|
|
||
|
|
:param mount_points: a list of mount points
|
||
|
|
:return: a total size in bytes
|
||
|
|
"""
|
||
|
|
return self.storage.get_file_system_free_space(mount_points).get_bytes()
|
||
|
|
|
||
|
|
def get_disk_free_space(self, disk_names):
|
||
|
|
"""Get total free space on the given disks.
|
||
|
|
|
||
|
|
Calculates free space available for use.
|
||
|
|
|
||
|
|
:param disk_names: a list of disk names
|
||
|
|
:return: a total size in bytes
|
||
|
|
"""
|
||
|
|
disks = self._get_devices(disk_names)
|
||
|
|
return self.storage.get_disk_free_space(disks).get_bytes()
|
||
|
|
|
||
|
|
def get_disk_reclaimable_space(self, disk_names):
|
||
|
|
"""Get total reclaimable space on the given disks.
|
||
|
|
|
||
|
|
Calculates free space unavailable but reclaimable
|
||
|
|
from existing partitions.
|
||
|
|
|
||
|
|
:param disk_names: a list of disk names
|
||
|
|
:return: a total size in bytes
|
||
|
|
"""
|
||
|
|
disks = self._get_devices(disk_names)
|
||
|
|
return self.storage.get_disk_reclaimable_space(disks).get_bytes()
|
||
|
|
|
||
|
|
def get_disk_total_space(self, disk_names):
|
||
|
|
"""Get total space on the given disks.
|
||
|
|
|
||
|
|
:param disk_names: a list of disk names
|
||
|
|
:return: a total size in bytes
|
||
|
|
"""
|
||
|
|
disks = self._get_devices(disk_names)
|
||
|
|
return sum((d.size for d in disks), Size(0)).get_bytes()
|
||
|
|
|
||
|
|
def get_fstab_spec(self, name):
|
||
|
|
"""Get the device specifier for use in /etc/fstab.
|
||
|
|
|
||
|
|
:param name: a name of the device
|
||
|
|
:return: a device specifier for /etc/fstab
|
||
|
|
"""
|
||
|
|
device = self._get_device(name)
|
||
|
|
return device.fstab_spec
|
||
|
|
|
||
|
|
def get_existing_systems(self):
|
||
|
|
"""Get existing GNU/Linux installations.
|
||
|
|
|
||
|
|
:return: a list of data about found installations
|
||
|
|
"""
|
||
|
|
return list(map(self._get_os_data, self.storage.roots))
|
||
|
|
|
||
|
|
def _get_os_data(self, root):
|
||
|
|
"""Get the OS data.
|
||
|
|
|
||
|
|
:param root: an instance of Root
|
||
|
|
:return: an instance of OSData
|
||
|
|
"""
|
||
|
|
data = OSData()
|
||
|
|
data.os_name = root.name or ""
|
||
|
|
data.devices = [
|
||
|
|
device.name for device in root.devices
|
||
|
|
]
|
||
|
|
data.mount_points = {
|
||
|
|
path: device.name for path, device in root.mounts.items()
|
||
|
|
}
|
||
|
|
return data
|
||
|
|
|
||
|
|
def _get_mount_point_constraints_data(self, spec):
|
||
|
|
"""Get the mount point data.
|
||
|
|
|
||
|
|
:param spec: an instance of PartSpec
|
||
|
|
:return: an instance of MountPointConstraintsData
|
||
|
|
"""
|
||
|
|
data = MountPointConstraintsData()
|
||
|
|
data.mount_point = spec.mountpoint or ""
|
||
|
|
data.required_filesystem_type = spec.fstype or ""
|
||
|
|
data.encryption_allowed = spec.encrypted
|
||
|
|
data.logical_volume_allowed = spec.lv
|
||
|
|
|
||
|
|
return data
|
||
|
|
|
||
|
|
def get_mount_point_constraints(self):
|
||
|
|
"""Get list of constraints on mountpoints for the current platform
|
||
|
|
|
||
|
|
Also provides hints if the partition is required or recommended.
|
||
|
|
|
||
|
|
This includes mount points required to boot (e.g. /boot/efi, /boot)
|
||
|
|
and the / partition which is always considered to be required.
|
||
|
|
|
||
|
|
/boot is not required in general but can be required in some cases,
|
||
|
|
depending on the filesystem on the root partition (ie crypted root).
|
||
|
|
|
||
|
|
:return: a list of mount points with its constraints
|
||
|
|
"""
|
||
|
|
|
||
|
|
constraints = []
|
||
|
|
|
||
|
|
# Root partition is required
|
||
|
|
root_partition = PartSpec(mountpoint="/", lv=True, thin=True, encrypted=True)
|
||
|
|
root_constraint = self._get_mount_point_constraints_data(root_partition)
|
||
|
|
root_constraint.required = True
|
||
|
|
constraints.append(root_constraint)
|
||
|
|
|
||
|
|
# Platform partitions are required except for /boot partiotion which is recommended
|
||
|
|
for p in platform.partitions:
|
||
|
|
if p:
|
||
|
|
constraint = self._get_mount_point_constraints_data(p)
|
||
|
|
if p.mountpoint == "/boot":
|
||
|
|
constraint.recommended = True
|
||
|
|
else:
|
||
|
|
constraint.required = True
|
||
|
|
constraints.append(constraint)
|
||
|
|
|
||
|
|
return constraints
|