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# Copyright (c) 2019 Cisco and/or its affiliates.
# 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.
"""VPP Configuration File Generator library."""
import re
from resources.libraries.python.ssh import exec_cmd_no_error
from resources.libraries.python.topology import NodeType
from resources.libraries.python.topology import Topology
from resources.libraries.python.VPPUtil import VPPUtil
__all__ = ['VppConfigGenerator']
def pci_dev_check(pci_dev):
"""Check if provided PCI address is in correct format.
:param pci_dev: PCI address (expected format: xxxx:xx:xx.x).
:type pci_dev: str
:returns: True if PCI address is in correct format.
:rtype: bool
:raises ValueError: If PCI address is in incorrect format.
"""
pattern = re.compile("^[0-9A-Fa-f]{4}:[0-9A-Fa-f]{2}:"
"[0-9A-Fa-f]{2}\\.[0-9A-Fa-f]$")
if not pattern.match(pci_dev):
raise ValueError('PCI address {addr} is not in valid format '
'xxxx:xx:xx.x'.format(addr=pci_dev))
return True
class VppConfigGenerator(object):
"""VPP Configuration File Generator."""
def __init__(self):
"""Initialize library."""
# VPP Node to apply configuration on
self._node = ''
# VPP Hostname
self._hostname = ''
# VPP Configuration
self._nodeconfig = {}
# Serialized VPP Configuration
self._vpp_config = ''
# VPP Service name
self._vpp_service_name = 'vpp'
# VPP Logfile location
self._vpp_logfile = '/tmp/vpe.log'
# VPP Startup config location
self._vpp_startup_conf = '/etc/vpp/startup.conf'
# VPP Startup config backup location
self._vpp_startup_conf_backup = None
def set_node(self, node):
"""Set DUT node.
:param node: Node to store configuration on.
:type node: dict
:raises RuntimeError: If Node type is not DUT.
"""
if node['type'] != NodeType.DUT:
raise RuntimeError('Startup config can only be applied to DUT'
'node.')
self._node = node
self._hostname = Topology.get_node_hostname(node)
def set_vpp_logfile(self, logfile):
"""Set VPP logfile location.
:param logfile: VPP logfile location.
:type logfile: str
"""
self._vpp_logfile = logfile
def set_vpp_startup_conf_backup(self, backup='/etc/vpp/startup.backup'):
"""Set VPP startup configuration backup.
:param backup: VPP logfile location.
:type backup: str
"""
self._vpp_startup_conf_backup = backup
def get_config_str(self):
"""Get dumped startup configuration in VPP config format.
:returns: Startup configuration in VPP config format.
:rtype: str
"""
self.dump_config(self._nodeconfig)
return self._vpp_config
def add_config_item(self, config, value, path):
"""Add startup configuration item.
:param config: Startup configuration of node.
:param value: Value to insert.
:param path: Path where to insert item.
:type config: dict
:type value: str
:type path: list
"""
if len(path) == 1:
config[path[0]] = value
return
if path[0] not in config:
config[path[0]] = {}
elif isinstance(config[path[0]], str):
config[path[0]] = {} if config[path[0]] == '' \
else {config[path[0]]: ''}
self.add_config_item(config[path[0]], value, path[1:])
def dump_config(self, obj, level=-1):
"""Dump the startup configuration in VPP config format.
:param obj: Python Object to print.
:param level: Nested level for indentation.
:type obj: Obj
:type level: int
:returns: nothing
"""
indent = ' '
if level >= 0:
self._vpp_config += '{}{{\n'.format((level) * indent)
if isinstance(obj, dict):
for key, val in obj.items():
if hasattr(val, '__iter__'):
self._vpp_config += '{}{}\n'.format((level + 1) * indent,
key)
self.dump_config(val, level + 1)
else:
self._vpp_config += '{}{} {}\n'.format((level + 1) * indent,
key, val)
else:
for val in obj:
self._vpp_config += '{}{}\n'.format((level + 1) * indent, val)
if level >= 0:
self._vpp_config += '{}}}\n'.format(level * indent)
def add_unix_log(self, value=None):
"""Add UNIX log configuration.
:param value: Log file.
:type value: str
"""
path = ['unix', 'log']
if value is None:
value = self._vpp_logfile
self.add_config_item(self._nodeconfig, value, path)
def add_unix_cli_listen(self, value='/run/vpp/cli.sock'):
"""Add UNIX cli-listen configuration.
:param value: CLI listen address and port or path to CLI socket.
:type value: str
"""
path = ['unix', 'cli-listen']
self.add_config_item(self._nodeconfig, value, path)
def add_unix_gid(self, value='vpp'):
"""Add UNIX gid configuration.
:param value: Gid.
:type value: str
"""
path = ['unix', 'gid']
self.add_config_item(self._nodeconfig, value, path)
def add_unix_nodaemon(self):
"""Add UNIX nodaemon configuration."""
path = ['unix', 'nodaemon']
self.add_config_item(self._nodeconfig, '', path)
def add_unix_coredump(self):
"""Add UNIX full-coredump configuration."""
path = ['unix', 'full-coredump']
self.add_config_item(self._nodeconfig, '', path)
def add_unix_exec(self, value):
"""Add UNIX exec configuration."""
path = ['unix', 'exec']
self.add_config_item(self._nodeconfig, value, path)
def add_api_segment_gid(self, value='vpp'):
"""Add API-SEGMENT gid configuration.
:param value: Gid.
:type value: str
"""
path = ['api-segment', 'gid']
self.add_config_item(self._nodeconfig, value, path)
def add_api_segment_global_size(self, value):
"""Add API-SEGMENT global-size configuration.
:param value: Global size.
:type value: str
"""
path = ['api-segment', 'global-size']
self.add_config_item(self._nodeconfig, value, path)
def add_api_segment_api_size(self, value):
"""Add API-SEGMENT api-size configuration.
:param value: API size.
:type value: str
"""
path = ['api-segment', 'api-size']
self.add_config_item(self._nodeconfig, value, path)
def add_buffers_per_numa(self, value):
"""Increase number of buffers allocated.
:param value: Number of buffers allocated.
:type value: int
"""
path = ['buffers', 'buffers-per-numa']
self.add_config_item(self._nodeconfig, value, path)
def add_dpdk_dev(self, *devices):
"""Add DPDK PCI device configuration.
:param devices: PCI device(s) (format xxxx:xx:xx.x)
:type devices: tuple
"""
for device in devices:
if pci_dev_check(device):
path = ['dpdk', 'dev {0}'.format(device)]
self.add_config_item(self._nodeconfig, '', path)
def add_dpdk_dev_parameter(self, device, parameter, value):
"""Add parameter for DPDK device.
:param device: PCI device (format xxxx:xx:xx.x).
:param parameter: Parameter name.
:param value: Parameter value.
:type device: str
:type parameter: str
:type value: str
"""
if pci_dev_check(device):
path = ['dpdk', 'dev {0}'.format(device), parameter]
self.add_config_item(self._nodeconfig, value, path)
def add_dpdk_cryptodev(self, count):
"""Add DPDK Crypto PCI device configuration.
:param count: Number of HW crypto devices to add.
:type count: int
"""
cryptodev = Topology.get_cryptodev(self._node)
for i in range(count):
cryptodev_config = 'dev {0}'.format(
re.sub(r'\d.\d$', '1.'+str(i), cryptodev))
path = ['dpdk', cryptodev_config]
self.add_config_item(self._nodeconfig, '', path)
self.add_dpdk_uio_driver('vfio-pci')
def add_dpdk_sw_cryptodev(self, sw_pmd_type, socket_id, count):
"""Add DPDK SW Crypto device configuration.
:param sw_pmd_type: Type of SW crypto device PMD to add.
:param socket_id: Socket ID.
:param count: Number of SW crypto devices to add.
:type sw_pmd_type: str
:type socket_id: int
:type count: int
"""
for _ in range(count):
cryptodev_config = 'vdev cryptodev_{0}_pmd,socket_id={1}'.\
format(sw_pmd_type, str(socket_id))
path = ['dpdk', cryptodev_config]
self.add_config_item(self._nodeconfig, '', path)
def add_dpdk_eth_bond_dev(self, ethbond_id, mode, xmit_policy, *slaves):
"""Add DPDK Eth_bond device configuration.
:param ethbond_id: Eth_bond device ID.
:param mode: Link bonding mode.
:param xmit_policy: Transmission policy.
:param slaves: PCI device(s) to be bonded (format xxxx:xx:xx.x).
:type ethbond_id: str or int
:type mode: str or int
:type xmit_policy: str
:type slaves: list
"""
slaves_config = ',slave=' + \
',slave='.join(slave if pci_dev_check(slave) else ''
for slave in slaves)
ethbond_config = 'vdev eth_bond{id},mode={mode}{slaves},' \
'xmit_policy={xmit_pol}'.format(id=ethbond_id,
mode=mode,
slaves=slaves_config,
xmit_pol=xmit_policy)
path = ['dpdk', ethbond_config]
self.add_config_item(self._nodeconfig, '', path)
def add_dpdk_dev_default_rxq(self, value):
"""Add DPDK dev default rxq configuration.
:param value: Default number of rxqs.
:type value: str
"""
path = ['dpdk', 'dev default', 'num-rx-queues']
self.add_config_item(self._nodeconfig, value, path)
def add_dpdk_dev_default_txq(self, value):
"""Add DPDK dev default txq configuration.
:param value: Default number of txqs.
:type value: str
"""
path = ['dpdk', 'dev default', 'num-tx-queues']
self.add_config_item(self._nodeconfig, value, path)
def add_dpdk_dev_default_rxd(self, value):
"""Add DPDK dev default rxd configuration.
:param value: Default number of rxds.
:type value: str
"""
path = ['dpdk', 'dev default', 'num-rx-desc']
self.add_config_item(self._nodeconfig, value, path)
def add_dpdk_dev_default_txd(self, value):
"""Add DPDK dev default txd configuration.
:param value: Default number of txds.
:type value: str
"""
path = ['dpdk', 'dev default', 'num-tx-desc']
self.add_config_item(self._nodeconfig, value, path)
def add_dpdk_log_level(self, value):
"""Add DPDK log-level configuration.
:param value: Log level.
:type value: str
"""
path = ['dpdk', 'log-level']
self.add_config_item(self._nodeconfig, value, path)
def add_dpdk_no_pci(self):
"""Add DPDK no-pci."""
path = ['dpdk', 'no-pci']
self.add_config_item(self._nodeconfig, '', path)
def add_dpdk_uio_driver(self, value=None):
"""Add DPDK uio-driver configuration.
:param value: DPDK uio-driver configuration. By default, driver will be
loaded automatically from Topology file, still leaving
option to manually override by parameter.
:type value: str
"""
if value is None:
value = Topology.get_uio_driver(self._node)
path = ['dpdk', 'uio-driver']
self.add_config_item(self._nodeconfig, value, path)
def add_cpu_main_core(self, value):
"""Add CPU main core configuration.
:param value: Main core option.
:type value: str
"""
path = ['cpu', 'main-core']
self.add_config_item(self._nodeconfig, value, path)
def add_cpu_corelist_workers(self, value):
"""Add CPU corelist-workers configuration.
:param value: Corelist-workers option.
:type value: str
"""
path = ['cpu', 'corelist-workers']
self.add_config_item(self._nodeconfig, value, path)
def add_heapsize(self, value):
"""Add Heapsize configuration.
:param value: Amount of heapsize.
:type value: str
"""
path = ['heapsize']
self.add_config_item(self._nodeconfig, value, path)
def add_api_trace(self):
"""Add API trace configuration."""
path = ['api-trace', 'on']
self.add_config_item(self._nodeconfig, '', path)
def add_ip6_hash_buckets(self, value):
"""Add IP6 hash buckets configuration.
:param value: Number of IP6 hash buckets.
:type value: str
"""
path = ['ip6', 'hash-buckets']
self.add_config_item(self._nodeconfig, value, path)
def add_ip6_heap_size(self, value):
"""Add IP6 heap-size configuration.
:param value: IP6 Heapsize amount.
:type value: str
"""
path = ['ip6', 'heap-size']
self.add_config_item(self._nodeconfig, value, path)
def add_ip_heap_size(self, value):
"""Add IP heap-size configuration.
:param value: IP Heapsize amount.
:type value: str
"""
path = ['ip', 'heap-size']
self.add_config_item(self._nodeconfig, value, path)
def add_statseg_size(self, value):
"""Add stats segment heap size configuration.
:param value: Stats heapsize amount.
:type value: str
"""
path = ['statseg', 'size']
self.add_config_item(self._nodeconfig, value, path)
def add_statseg_per_node_counters(self, value):
"""Add stats per-node-counters configuration.
:param value: "on" to switch the counters on.
:type value: str
"""
path = ['statseg', 'per-node-counters']
self.add_config_item(self._nodeconfig, value, path)
def add_plugin(self, state, *plugins):
"""Add plugin section for specific plugin(s).
:param state: State of plugin [enable|disable].
:param plugins: Plugin(s) to disable.
:type state: str
:type plugins: list
"""
for plugin in plugins:
path = ['plugins', 'plugin {0}'.format(plugin), state]
self.add_config_item(self._nodeconfig, ' ', path)
def add_dpdk_no_multi_seg(self):
"""Add DPDK no-multi-seg configuration."""
path = ['dpdk', 'no-multi-seg']
self.add_config_item(self._nodeconfig, '', path)
def add_dpdk_no_tx_checksum_offload(self):
"""Add DPDK no-tx-checksum-offload configuration."""
path = ['dpdk', 'no-tx-checksum-offload']
self.add_config_item(self._nodeconfig, '', path)
def add_nat(self, value='deterministic'):
"""Add NAT configuration.
:param value: NAT mode.
:type value: str
"""
path = ['nat']
self.add_config_item(self._nodeconfig, value, path)
def add_tcp_preallocated_connections(self, value):
"""Add TCP pre-allocated connections.
:param value: The number of pre-allocated connections.
:type value: int
"""
path = ['tcp', 'preallocated-connections']
self.add_config_item(self._nodeconfig, value, path)
def add_tcp_preallocated_half_open_connections(self, value):
"""Add TCP pre-allocated half open connections.
:param value: The number of pre-allocated half open connections.
:type value: int
"""
path = ['tcp', 'preallocated-half-open-connections']
self.add_config_item(self._nodeconfig, value, path)
def add_session_event_queue_length(self, value):
"""Add session event queue length.
:param value: Session event queue length.
:type value: int
"""
path = ['session', 'event-queue-length']
self.add_config_item(self._nodeconfig, value, path)
def add_session_preallocated_sessions(self, value):
"""Add the number of pre-allocated sessions.
:param value: Number of pre-allocated sessions.
:type value: int
"""
path = ['session', 'preallocated-sessions']
self.add_config_item(self._nodeconfig, value, path)
def add_session_v4_session_table_buckets(self, value):
"""Add number of v4 session table buckets to the config.
:param value: Number of v4 session table buckets.
:type value: int
"""
path = ['session', 'v4-session-table-buckets']
self.add_config_item(self._nodeconfig, value, path)
def add_session_v4_session_table_memory(self, value):
"""Add the size of v4 session table memory.
:param value: Size of v4 session table memory.
:type value: str
"""
path = ['session', 'v4-session-table-memory']
self.add_config_item(self._nodeconfig, value, path)
def add_session_v4_halfopen_table_buckets(self, value):
"""Add the number of v4 halfopen table buckets.
:param value: Number of v4 halfopen table buckets.
:type value: int
"""
path = ['session', 'v4-halfopen-table-buckets']
self.add_config_item(self._nodeconfig, value, path)
def add_session_v4_halfopen_table_memory(self, value):
"""Add the size of v4 halfopen table memory.
:param value: Size of v4 halfopen table memory.
:type value: str
"""
path = ['session', 'v4-halfopen-table-memory']
self.add_config_item(self._nodeconfig, value, path)
def add_session_local_endpoints_table_buckets(self, value):
"""Add the number of local endpoints table buckets.
:param value: Number of local endpoints table buckets.
:type value: int
"""
path = ['session', 'local-endpoints-table-buckets']
self.add_config_item(self._nodeconfig, value, path)
def add_session_local_endpoints_table_memory(self, value):
"""Add the size of local endpoints table memory.
:param value: Size of local endpoints table memory.
:type value: str
"""
path = ['session', 'local-endpoints-table-memory']
self.add_config_item(self._nodeconfig, value, path)
def write_config(self, filename=None):
"""Generate and write VPP startup configuration to file.
Use data from calls to this class to form a startup.conf file and
replace /etc/vpp/startup.conf with it on topology node.
:param filename: Startup configuration file name.
:type filename: str
"""
self.dump_config(self._nodeconfig)
if filename is None:
filename = self._vpp_startup_conf
if self._vpp_startup_conf_backup is not None:
cmd = ('cp {src} {dest}'.format(
src=self._vpp_startup_conf, dest=self._vpp_startup_conf_backup))
exec_cmd_no_error(
self._node, cmd, sudo=True, message='Copy config file failed!')
cmd = ('echo "{config}" | sudo tee {filename}'.format(
config=self._vpp_config, filename=filename))
exec_cmd_no_error(
self._node, cmd, message='Writing config file failed!')
def apply_config(self, filename=None, verify_vpp=True):
"""Generate and write VPP startup configuration to file and restart VPP.
Use data from calls to this class to form a startup.conf file and
replace /etc/vpp/startup.conf with it on topology node.
:param filename: Startup configuration file name.
:param verify_vpp: Verify VPP is running after restart.
:type filename: str
:type verify_vpp: bool
"""
self.write_config(filename=filename)
VPPUtil.restart_vpp_service(self._node)
if verify_vpp:
VPPUtil.verify_vpp(self._node)
def restore_config(self):
"""Restore VPP startup.conf from backup."""
cmd = ('cp {src} {dest}'.format(
src=self._vpp_startup_conf_backup, dest=self._vpp_startup_conf))
exec_cmd_no_error(
self._node, cmd, sudo=True, message='Copy config file failed!')
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