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# Copyright 2014 Huawei Technologies Co. Ltd
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
"""Network related database operations."""
import logging
import netaddr
import re
from compass.db.api import database
from compass.db.api import permission
from compass.db.api import user as user_api
from compass.db.api import utils
from compass.db import exception
from compass.db import models
SUPPORTED_FIELDS = ['subnet', 'name']
RESP_FIELDS = [
'id', 'name', 'subnet', 'created_at', 'updated_at'
]
ADDED_FIELDS = ['subnet']
OPTIONAL_ADDED_FIELDS = ['name']
IGNORE_FIELDS = [
'id', 'created_at', 'updated_at'
]
UPDATED_FIELDS = ['subnet', 'name']
def _check_subnet(subnet):
"""Check subnet format is correct."""
try:
netaddr.IPNetwork(subnet)
except Exception as error:
logging.exception(error)
raise exception.InvalidParameter(
'subnet %s format unrecognized' % subnet)
@utils.supported_filters(optional_support_keys=SUPPORTED_FIELDS)
@database.run_in_session()
@user_api.check_user_permission(
permission.PERMISSION_LIST_SUBNETS
)
@utils.wrap_to_dict(RESP_FIELDS)
def list_subnets(user=None, session=None, **filters):
"""List subnets."""
return utils.list_db_objects(
session, models.Subnet, **filters
)
def _get_subnet(subnet_id, session=None, **kwargs):
"""Get subnet by subnet id."""
if isinstance(subnet_id, (int, long)):
return utils.get_db_object(
session, models.Subnet,
id=subnet_id, **kwargs
)
raise exception.InvalidParameter(
'subnet id %s type is not int compatible' % subnet_id
)
@utils.supported_filters([])
@database.run_in_session()
@user_api.check_user_permission(
permission.PERMISSION_LIST_SUBNETS
)
@utils.wrap_to_dict(RESP_FIELDS)
def get_subnet(
subnet_id, exception_when_missing=True,
user=None, session=None, **kwargs
):
"""Get subnet info."""
return _get_subnet(
subnet_id, session=session,
exception_when_missing=exception_when_missing
)
@utils.supported_filters(
ADDED_FIELDS, optional_support_keys=OPTIONAL_ADDED_FIELDS,
ignore_support_keys=IGNORE_FIELDS
)
@utils.input_validates(subnet=_check_subnet)
@database.run_in_session()
@user_api.check_user_permission(
permission.PERMISSION_ADD_SUBNET
)
@utils.wrap_to_dict(RESP_FIELDS)
def add_subnet(
exception_when_existing=True, subnet=None,
user=None, session=None, **kwargs
):
"""Create a subnet."""
return utils.add_db_object(
session, models.Subnet,
exception_when_existing, subnet, **kwargs
)
@utils.supported_filters(
optional_support_keys=UPDATED_FIELDS,
ignore_support_keys=IGNORE_FIELDS
)
@utils.input_validates(subnet=_check_subnet)
@database.run_in_session()
@user_api.check_user_permission(
permission.PERMISSION_ADD_SUBNET
)
@utils.wrap_to_dict(RESP_FIELDS)
def update_subnet(subnet_id, user=None, session=None, **kwargs):
"""Update a subnet."""
subnet = _get_subnet(
subnet_id, session=session
)
return utils.update_db_object(session, subnet, **kwargs)
def _check_subnet_deletable(subnet):
"""Check a subnet deletable."""
if subnet.host_networks:
host_networks = [
'%s:%s=%s' % (
host_network.host.name, host_network.interface,
host_network.ip
)
for host_network in subnet.host_networks
]
raise exception.NotAcceptable(
'subnet %s contains host networks %s' % (
subnet.subnet, host_networks
)
)
@utils.supported_filters([])
@database.run_in_session()
@user_api.check_user_permission(
permission.PERMISSION_DEL_SUBNET
)
@utils.wrap_to_dict(RESP_FIELDS)
def del_subnet(subnet_id, user=None, session=None, **kwargs):
"""Delete a subnet."""
subnet = _get_subnet(
subnet_id, session=session
)
_check_subnet_deletable(subnet)
return utils.del_db_object(session, subnet)
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