def create_trunk(context, port_id, description=None):
"""Create a trunk (with description) given the parent port uuid."""
try:
with context.session.begin(subtransactions=True):
context.session.add(
models.Trunk(
id=uuidutils.generate_uuid(),
tenant_id=context.tenant_id,
port_id=port_id,
description=description))
except db_exc.DBDuplicateEntry:
raise exceptions.TrunkPortInUse(port_id=port_id)
def validate(self, context):
"""Validate that the port can be used in a trunk."""
# TODO(tidwellr): there is a chance of a race between the
# time these checks are performed and the time the trunk
# creation is executed. To be revisited, if it bites.
# Validate that the given port_id is not used by a subport.
subports = trunk_objects.SubPort.get_objects(
context, port_id=self.port_id)
if subports:
raise trunk_exc.TrunkPortInUse(port_id=self.port_id)
# Validate that the given port_id is not used by a trunk.
trunks = trunk_objects.Trunk.get_objects(context, port_id=self.port_id)
if trunks:
raise trunk_exc.ParentPortInUse(port_id=self.port_id)
if self.is_bound(context):
raise trunk_exc.ParentPortInUse(port_id=self.port_id)
return self.port_id
def validate(self, context, parent_port=True):
"""Validate that the port can be used in a trunk.
:param parent_port: True if the port is intended for use
as parent in a trunk.
"""
# TODO(tidwellr): there is a chance of a race between the
# time these checks are performed and the time the trunk
# creation is executed. To be revisited, if it bites.
# Validate that the given port_id is not used by a subport.
subports = trunk_objects.SubPort.get_objects(
context, port_id=self.port_id)
if subports:
raise trunk_exc.TrunkPortInUse(port_id=self.port_id)
# Validate that the given port_id is not used by a trunk.
trunks = trunk_objects.Trunk.get_objects(context, port_id=self.port_id)
if trunks:
raise trunk_exc.ParentPortInUse(port_id=self.port_id)
if parent_port:
# if the port is being used as a parent in a trunk, check if
# it can be trunked, i.e. if it is already associated to physical
# resources (namely it is bound). Bound ports may be used as
# trunk parents, but that depends on the underlying driver in
# charge.
if not self.can_be_trunked(context):
raise trunk_exc.ParentPortInUse(port_id=self.port_id)
else:
# if the port is being used as subport in a trunk, check if it is a
# port that is not actively used for other purposes, e.g. a router
# port, compute port, DHCP port etc. We have no clue what the side
# effects of connecting the port to a trunk would be, and it is
# better to err on the side of caution and prevent the operation.
self.check_not_in_use(context)
return self.port_id