159 lines
5.1 KiB
Python
159 lines
5.1 KiB
Python
#
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# Copyright 2011, 2013 Red Hat, Inc.
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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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_XML_PROP_ORDER = ["_type_prop", "accessmode", "fmode", "dmode"]
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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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MODE_MAPPED = "mapped"
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MODE_SQUASH = "squash"
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DRIVER_LOOP = "loop"
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DRIVER_NBD = "nbd"
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_type_prop = XMLProperty("./@type")
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accessmode = XMLProperty("./@accessmode")
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model = XMLProperty("./@model")
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multidevs = XMLProperty("./@multidevs")
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fmode = XMLProperty("./@fmode")
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dmode = XMLProperty("./@dmode")
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readonly = XMLProperty("./readonly", is_bool=True)
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space_hard_limit = XMLProperty("./space_hard_limit")
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space_soft_limit = XMLProperty("./space_soft_limit")
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driver_wrpolicy = XMLProperty("./driver/@wrpolicy")
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driver_type = XMLProperty("./driver/@type")
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driver_format = XMLProperty("./driver/@format")
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driver_queue = XMLProperty("./driver/@queue")
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driver_name = XMLProperty("./driver/@name")
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target_dir = XMLProperty("./target/@dir")
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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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source_units = XMLProperty("./source/@units")
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source_pool = XMLProperty("./source/@pool")
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source_volume = XMLProperty("./source/@volume")
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source_socket = XMLProperty("./source/socket")
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binary_path = XMLProperty("./binary/@path")
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binary_xattr = XMLProperty("./binary/@xattr", is_onoff=True)
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binary_cache_mode = XMLProperty("./binary/cache/@mode")
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binary_lock_posix = XMLProperty("./binary/lock/@posix", is_onoff=True)
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binary_lock_flock = XMLProperty("./binary/lock/@flock", is_onoff=True)
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binary_sandbox_mode = XMLProperty("./binary/sandbox/@mode")
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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_target(self):
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return self.target_dir
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def _set_target(self, val):
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self.target_dir = val
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target = property(_get_target, _set_target)
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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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##############
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# Validation #
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##############
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def validate_target(self, target):
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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_MOUNT)):
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return
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if not os.path.isabs(target):
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raise ValueError(_("Filesystem target '%s' must be an absolute "
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"path") % target)
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def validate(self):
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if self.target:
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self.validate_target(self.target)
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def default_accessmode(self):
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if self.driver_type == "virtiofs":
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# let libvirt fill in default accessmode=passthrough
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return None
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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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return self.MODE_MAPPED
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##################
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# Default config #
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##################
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def set_defaults(self, guest):
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ignore = guest
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if not (self.conn.is_qemu() or
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self.conn.is_lxc() or
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self.conn.is_test()):
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return
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# type=mount is the libvirt default. But hardcode it since other
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# bits like validation depend on it
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if self.type is None:
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self.type = self.TYPE_MOUNT
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if self.accessmode is None:
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self.accessmode = self.default_accessmode()
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