Current File : //usr/share/virt-manager/virtinst/devicefilesystem.py
#
# Copyright 2011, 2013 Red Hat, Inc.
# Cole Robinson <crobinso@redhat.com>
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU 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.
import os
from .device import VirtualDevice
from .xmlbuilder import XMLProperty
class VirtualFilesystem(VirtualDevice):
virtual_device_type = VirtualDevice.VIRTUAL_DEV_FILESYSTEM
TYPE_MOUNT = "mount"
TYPE_TEMPLATE = "template"
TYPE_FILE = "file"
TYPE_BLOCK = "block"
TYPE_RAM = "ram"
TYPE_DEFAULT = "default"
TYPES = [TYPE_MOUNT, TYPE_TEMPLATE, TYPE_FILE, TYPE_BLOCK, TYPE_RAM,
TYPE_DEFAULT]
MODE_PASSTHROUGH = "passthrough"
MODE_MAPPED = "mapped"
MODE_SQUASH = "squash"
MODE_DEFAULT = "default"
MODES = [MODE_PASSTHROUGH, MODE_MAPPED, MODE_SQUASH, MODE_DEFAULT]
WRPOLICY_IMM = "immediate"
WRPOLICY_DEFAULT = "default"
WRPOLICIES = [WRPOLICY_IMM, WRPOLICY_DEFAULT]
DRIVER_PATH = "path"
DRIVER_HANDLE = "handle"
DRIVER_LOOP = "loop"
DRIVER_NBD = "nbd"
DRIVER_DEFAULT = "default"
DRIVERS = [DRIVER_PATH, DRIVER_HANDLE, DRIVER_LOOP, DRIVER_NBD,
DRIVER_DEFAULT]
_type_prop = XMLProperty("./@type",
default_cb=lambda s: None,
default_name=TYPE_DEFAULT)
accessmode = XMLProperty("./@accessmode",
default_cb=lambda s: None,
default_name=MODE_DEFAULT)
wrpolicy = XMLProperty("./driver/@wrpolicy",
default_cb=lambda s: None,
default_name=WRPOLICY_DEFAULT)
driver = XMLProperty("./driver/@type",
default_cb=lambda s: None,
default_name=DRIVER_DEFAULT)
format = XMLProperty("./driver/@format")
readonly = XMLProperty("./readonly", is_bool=True)
units = XMLProperty("./source/@units")
def _validate_set_target(self, val):
# In case of qemu for default fs type (mount) target is not
# actually a directory, it is merely a arbitrary string tag
# that is exported to the guest as a hint for where to mount
if ((self.conn.is_qemu() or self.conn.is_test()) and
(self.type is None or
self.type == self.TYPE_DEFAULT or
self.type == self.TYPE_MOUNT)):
pass
elif not os.path.isabs(val):
raise ValueError(_("Filesystem target '%s' must be an absolute "
"path") % val)
return val
target = XMLProperty("./target/@dir",
set_converter=_validate_set_target)
_source_dir = XMLProperty("./source/@dir")
_source_name = XMLProperty("./source/@name")
_source_file = XMLProperty("./source/@file")
_source_dev = XMLProperty("./source/@dev")
_source_usage = XMLProperty("./source/@usage")
def _type_to_source_prop(self):
if self.type == VirtualFilesystem.TYPE_TEMPLATE:
return "_source_name"
elif self.type == VirtualFilesystem.TYPE_FILE:
return "_source_file"
elif self.type == VirtualFilesystem.TYPE_BLOCK:
return "_source_dev"
elif self.type == VirtualFilesystem.TYPE_RAM:
return "_source_usage"
else:
return "_source_dir"
def _get_source(self):
return getattr(self, self._type_to_source_prop())
def _set_source(self, val):
return setattr(self, self._type_to_source_prop(), val)
source = property(_get_source, _set_source)
def _get_type(self):
return getattr(self, '_type_prop')
def _set_type(self, val):
# Get type/value of the attrubute of "source" property
old_source_type = self._type_to_source_prop()
old_source_value = self.source
# Update "type" property
new_type = setattr(self, '_type_prop', val)
# If the attribute type of 'source' property has changed
# restore the value
if old_source_type != self._type_to_source_prop():
self.source = old_source_value
return new_type
type = property(_get_type, _set_type)
def set_defaults(self, guest):
ignore = guest
if self.conn.is_qemu() or self.conn.is_lxc() or self.conn.is_test():
# type=mount is the libvirt default. But hardcode it
# here since we need it for the accessmode check
if self.type is None or self.type == self.TYPE_DEFAULT:
self.type = self.TYPE_MOUNT
# libvirt qemu defaults to accessmode=passthrough, but that
# really only works well for qemu running as root, which is
# not the common case. so use mode=mapped
if self.accessmode is None or self.accessmode == self.MODE_DEFAULT:
self.accessmode = self.MODE_MAPPED
VirtualFilesystem.register_type()
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