class VolumeInfo(properties.Owner):
"""
VolumeInfo should be used for performing operations on any volume in a
chain except shared volume.
A volume is prepared in read-write mode.
While performing operations, the volume is not set as illegal.
"""
sd_id = properties.UUID(required=True)
img_id = properties.UUID(required=True)
vol_id = properties.UUID(required=True)
generation = properties.Integer(required=False,
minval=0,
maxval=sc.MAX_GENERATION)
def __init__(self, params, host_id):
self.sd_id = params.get('sd_id')
self.img_id = params.get('img_id')
self.vol_id = params.get('vol_id')
self.generation = params.get('generation')
self._host_id = host_id
self._vol = None
@property
def locks(self):
img_ns = rm.getNamespace(sc.IMAGE_NAMESPACE, self.sd_id)
ret = [
rm.ResourceManagerLock(sc.STORAGE, self.sd_id, rm.SHARED),
rm.ResourceManagerLock(img_ns, self.img_id, rm.EXCLUSIVE)
]
dom = sdCache.produce_manifest(self.sd_id)
if dom.hasVolumeLeases():
ret.append(
volume.VolumeLease(self._host_id, self.sd_id, self.img_id,
self.vol_id))
return ret
@property
def path(self):
return self.volume.getVolumePath()
@property
def volume(self):
if self._vol is None:
dom = sdCache.produce_manifest(self.sd_id)
self._vol = dom.produceVolume(self.img_id, self.vol_id)
return self._vol
def volume_operation(self):
return self.volume.operation(requested_gen=self.generation,
set_illegal=False)
@contextmanager
def prepare(self):
self.volume.prepare(rw=True, justme=False)
try:
yield
finally:
self.volume.teardown(self.sd_id, self.vol_id, justme=False)
class VolumeAttributes(properties.Owner):
generation = properties.Integer(required=False,
minval=0,
maxval=sc.MAX_GENERATION)
description = properties.String(required=False)
def __init__(self, params):
self.generation = params.get("generation")
self.description = params.get("description")
# TODO use properties.Enum when it supports optional enum
self.type = params.get("type")
# TODO use properties.Enum when it supports optional enum
self.legality = params.get("legality")
self._validate()
def _validate(self):
if self._is_empty():
raise ValueError("No attributes to update")
self._validate_type()
self._validate_legality()
def _is_empty(self):
return (self.description is None and self.generation is None
and self.legality is None and self.type is None)
def _validate_type(self):
if self.type is not None:
if self.type != sc.type2name(sc.SHARED_VOL):
raise ValueError("Volume type not supported %s" % self.type)
def _validate_legality(self):
if self.legality is not None:
if self.legality not in [sc.LEGAL_VOL, sc.ILLEGAL_VOL]:
raise ValueError("Legality not supported %s" % self.legality)
def __repr__(self):
values = [
"%s=%r" % (key, value) for key, value in vars(self).items()
if value is not None
]
return "<VolumeAttributes %s at 0x%x>" % (", ".join(values), id(self))
class Cls(properties.Owner):
value = properties.Integer(required=True)
def __init__(self, value=None):
self.value = value
class Cls(properties.Owner):
value = properties.Integer(maxval=100)
class Cls(properties.Owner):
value = properties.Integer(minval=0)
class CopyDataDivEndpoint(properties.Owner):
sd_id = properties.UUID(required=True)
img_id = properties.UUID(required=True)
vol_id = properties.UUID(required=True)
generation = properties.Integer(required=False,
minval=0,
maxval=sc.MAX_GENERATION)
def __init__(self, params, host_id, writable):
self.sd_id = params.get('sd_id')
self.img_id = params.get('img_id')
self.vol_id = params.get('vol_id')
self.generation = params.get('generation')
self._host_id = host_id
self._writable = writable
self._vol = None
@property
def locks(self):
img_ns = rm.getNamespace(sc.IMAGE_NAMESPACE, self.sd_id)
mode = rm.EXCLUSIVE if self._writable else rm.SHARED
ret = [
rm.ResourceManagerLock(sc.STORAGE, self.sd_id, rm.SHARED),
rm.ResourceManagerLock(img_ns, self.img_id, mode)
]
if self._writable:
dom = sdCache.produce_manifest(self.sd_id)
if dom.hasVolumeLeases():
ret.append(
volume.VolumeLease(self._host_id, self.sd_id, self.img_id,
self.vol_id))
return ret
@property
def path(self):
return self.volume.getVolumePath()
def is_invalid_vm_conf_disk(self):
return workarounds.invalid_vm_conf_disk(self.volume)
@property
def qemu_format(self):
return sc.fmt2str(self.volume.getFormat())
@property
def backing_path(self):
parent_vol = self.volume.getParentVolume()
if not parent_vol:
return None
return volume.getBackingVolumePath(self.img_id, parent_vol.volUUID)
@property
def qcow2_compat(self):
dom = sdCache.produce_manifest(self.sd_id)
return dom.qcow2_compat()
@property
def backing_qemu_format(self):
parent_vol = self.volume.getParentVolume()
if not parent_vol:
return None
return sc.fmt2str(parent_vol.getFormat())
@property
def volume(self):
if self._vol is None:
dom = sdCache.produce_manifest(self.sd_id)
self._vol = dom.produceVolume(self.img_id, self.vol_id)
return self._vol
def volume_operation(self):
return self.volume.operation(self.generation)
@contextmanager
def prepare(self):
self.volume.prepare(rw=self._writable, justme=False)
try:
yield
finally:
self.volume.teardown(self.sd_id, self.vol_id, justme=False)
