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# Copyright 2016 Red Hat Corporation.
#
# 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.
"""
veth port emulation
"""
import logging
import os
from tools import tasks
_LOGGER = logging.getLogger(__name__)
def add_veth_port(port, peer_port):
"""
Add a veth port
:param port:port name for the first port
:param peer_port: port name for the peer port
:return: None
"""
# touch some files in a tmp area so we can track them. This allows us to
# track VSPerf created veth ports so they can be cleaned up if needed.
if not os.path.isdir('/tmp/veth'):
try:
os.mkdir('/tmp/veth')
except os.error:
# OK don't crash but cleanup may be an issue
_LOGGER.error('Unable to create veth temp folder.')
_LOGGER.error(
'Veth ports may not be removed on testcase completion')
if os.path.isdir('/tmp/veth'):
with open('/tmp/veth/{}-{}'.format(port, peer_port), 'a'):
os.utime('/tmp/veth/{}-{}'.format(port, peer_port), None)
tasks.run_task(['sudo', 'ip', 'link', 'add',
port, 'type', 'veth', 'peer', 'name', peer_port],
_LOGGER, 'Adding veth port {} with peer port {}...'.format(
port, peer_port), False)
def bring_up_eth_port(eth_port, namespace=None):
"""
Bring up an eth port
:param eth_port: string of eth port to bring up
:param namespace: Namespace eth port it located if needed
:return: None
"""
if namespace:
tasks.run_task(['sudo', 'ip', 'netns', 'exec', namespace,
'ip', 'link', 'set', eth_port, 'up'],
_LOGGER,
'Bringing up port {} in namespace {}...'.format(
eth_port, namespace), False)
else:
tasks.run_task(['sudo', 'ip', 'link', 'set', eth_port, 'up'],
_LOGGER, 'Bringing up port...', False)
def del_veth_port(port, peer_port):
"""
Delete the veth ports, the peer will automatically be deleted on deletion
of the first port param
:param port: port name to delete
:param port: peer port name
:return: None
"""
# delete the file if it exists in the temp area
if os.path.exists('/tmp/veth/{}-{}'.format(port, peer_port)):
os.remove('/tmp/veth/{}-{}'.format(port, peer_port))
tasks.run_task(['sudo', 'ip', 'link', 'del', port],
_LOGGER, 'Deleting veth port {} with peer {}...'.format(
port, peer_port), False)
def validate_add_veth_port(_result, port, peer_port):
"""
Validation function for integration testcases
"""
devs = os.listdir('/sys/class/net')
return all([port in devs, peer_port in devs])
def validate_bring_up_eth_port(_result, eth_port, namespace=None):
"""
Validation function for integration testcases
"""
command = list()
if namespace:
command += ['ip', 'netns', 'exec', namespace]
command += ['cat', '/sys/class/net/{}/operstate'.format(eth_port)]
out = tasks.run_task(command, _LOGGER, 'Validating port up...', False)
# since different types of ports may report different status the best way
# we can do this for now is to just make sure it doesn't say down
if 'down' in out:
return False
return True
def validate_del_veth_port(_result, port, peer_port):
"""
Validation function for integration testcases
"""
devs = os.listdir('/sys/class/net')
return not any([port in devs, peer_port in devs])
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