mirror of
https://github.com/virt-manager/virt-manager.git
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135 lines
4.7 KiB
Python
135 lines
4.7 KiB
Python
#
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# Copyright 2011, 2013 Red Hat, Inc.
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# Cole Robinson <crobinso@redhat.com>
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#
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# This work is licensed under the GNU GPLv2 or later.
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# See the COPYING file in the top-level directory.
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import os
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from .device import Device
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from ..xmlbuilder import XMLProperty
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class DeviceFilesystem(Device):
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XML_NAME = "filesystem"
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TYPE_MOUNT = "mount"
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TYPE_TEMPLATE = "template"
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TYPE_FILE = "file"
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TYPE_BLOCK = "block"
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TYPE_RAM = "ram"
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TYPE_DEFAULT = "default"
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TYPES = [TYPE_MOUNT, TYPE_TEMPLATE, TYPE_FILE, TYPE_BLOCK, TYPE_RAM,
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TYPE_DEFAULT]
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MODE_PASSTHROUGH = "passthrough"
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MODE_MAPPED = "mapped"
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MODE_SQUASH = "squash"
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MODE_DEFAULT = "default"
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MODES = [MODE_PASSTHROUGH, MODE_MAPPED, MODE_SQUASH, MODE_DEFAULT]
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WRPOLICY_IMM = "immediate"
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WRPOLICY_DEFAULT = "default"
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WRPOLICIES = [WRPOLICY_IMM, WRPOLICY_DEFAULT]
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DRIVER_PATH = "path"
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DRIVER_HANDLE = "handle"
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DRIVER_LOOP = "loop"
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DRIVER_NBD = "nbd"
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DRIVER_DEFAULT = "default"
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DRIVERS = [DRIVER_PATH, DRIVER_HANDLE, DRIVER_LOOP, DRIVER_NBD,
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DRIVER_DEFAULT]
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_type_prop = XMLProperty("./@type",
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default_cb=lambda s: None,
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default_name=TYPE_DEFAULT)
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accessmode = XMLProperty("./@accessmode",
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default_cb=lambda s: None,
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default_name=MODE_DEFAULT)
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wrpolicy = XMLProperty("./driver/@wrpolicy",
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default_cb=lambda s: None,
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default_name=WRPOLICY_DEFAULT)
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driver = XMLProperty("./driver/@type",
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default_cb=lambda s: None,
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default_name=DRIVER_DEFAULT)
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format = XMLProperty("./driver/@format")
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readonly = XMLProperty("./readonly", is_bool=True)
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units = XMLProperty("./source/@units")
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def _validate_set_target(self, val):
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# In case of qemu for default fs type (mount) target is not
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# actually a directory, it is merely a arbitrary string tag
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# that is exported to the guest as a hint for where to mount
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if ((self.conn.is_qemu() or self.conn.is_test()) and
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(self.type is None or
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self.type == self.TYPE_DEFAULT or
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self.type == self.TYPE_MOUNT)):
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pass
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elif not os.path.isabs(val):
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raise ValueError(_("Filesystem target '%s' must be an absolute "
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"path") % val)
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return val
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target = XMLProperty("./target/@dir",
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set_converter=_validate_set_target)
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_source_dir = XMLProperty("./source/@dir")
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_source_name = XMLProperty("./source/@name")
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_source_file = XMLProperty("./source/@file")
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_source_dev = XMLProperty("./source/@dev")
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_source_usage = XMLProperty("./source/@usage")
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def _type_to_source_prop(self):
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if self.type == DeviceFilesystem.TYPE_TEMPLATE:
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return "_source_name"
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elif self.type == DeviceFilesystem.TYPE_FILE:
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return "_source_file"
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elif self.type == DeviceFilesystem.TYPE_BLOCK:
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return "_source_dev"
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elif self.type == DeviceFilesystem.TYPE_RAM:
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return "_source_usage"
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else:
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return "_source_dir"
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def _get_source(self):
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return getattr(self, self._type_to_source_prop())
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def _set_source(self, val):
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return setattr(self, self._type_to_source_prop(), val)
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source = property(_get_source, _set_source)
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def _get_type(self):
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return getattr(self, '_type_prop')
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def _set_type(self, val):
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# Get type/value of the attribute of "source" property
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old_source_type = self._type_to_source_prop()
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old_source_value = self.source
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# Update "type" property
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new_type = setattr(self, '_type_prop', val)
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# If the attribute type of 'source' property has changed
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# restore the value
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if old_source_type != self._type_to_source_prop():
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self.source = old_source_value
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return new_type
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type = property(_get_type, _set_type)
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def set_defaults(self, guest):
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ignore = guest
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if self.conn.is_qemu() or self.conn.is_lxc() or self.conn.is_test():
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# type=mount is the libvirt default. But hardcode it
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# here since we need it for the accessmode check
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if self.type is None or self.type == self.TYPE_DEFAULT:
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self.type = self.TYPE_MOUNT
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# libvirt qemu defaults to accessmode=passthrough, but that
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# really only works well for qemu running as root, which is
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# not the common case. so use mode=mapped
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if self.accessmode is None or self.accessmode == self.MODE_DEFAULT:
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self.accessmode = self.MODE_MAPPED
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