# Copyright (C) 2016 Intel 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. import os from oslo_concurrency import processutils from oslo_config import cfg from oslo_log import log from ironic_python_agent import hardware from ironic_python_agent import utils LOG = log.getLogger() CONF = cfg.CONF def _detect_cna_card(): addr_path = '/sys/class/net' for net_dev in os.listdir(addr_path): link_path = '{}/{}/device/driver/module'.format(addr_path, net_dev) try: out = utils.execute('readlink', '-v', link_path) except OSError as e: LOG.warning('Something went wrong when readlink for ' 'interface %(device)s. Error: %(error)s', {'device': net_dev, 'error': e}) continue except processutils.ProcessExecutionError as e: LOG.debug('Get driver for interface %(device)s failed. ' 'Error: %(error)s', {'device': net_dev, 'error': e}) continue driver_name = os.path.basename(out[0].strip()) if driver_name == 'i40e': return True return False def _disable_embedded_lldp_agent_in_cna_card(): addr_path = '/sys/kernel/debug/i40e' failed_dirs = [] if os.path.exists(addr_path): addr_dirs = os.listdir(addr_path) else: LOG.warning('Driver i40e was not loaded properly') return for inner_dir in addr_dirs: try: command_path = '{}/{}/command'.format(addr_path, inner_dir) with open(command_path, 'w') as command_file: command_file.write('lldp stop') except (OSError, IOError): failed_dirs.append(inner_dir) continue if failed_dirs: warning_msg = ('Failed to disable the embedded LLDP on Intel ' 'CNA network card. Addresses of failed pci ' 'devices: %s', str(failed_dirs).strip('[]')) LOG.warning(warning_msg) class IntelCnaHardwareManager(hardware.HardwareManager): HARDWARE_MANAGER_NAME = 'IntelCnaHardwareManager' HARDWARE_MANAGER_VERSION = '1.0' def evaluate_hardware_support(self): if _detect_cna_card(): LOG.debug('Found Intel CNA network card') # On Intel CNA cards, in order to make LLDP info collecting # possible, the embedded LLDP agent, which runs inside that # card, needs to be turned off. if CONF.collect_lldp: LOG.info('Disable CNA network card embedded lldp agent now') _disable_embedded_lldp_agent_in_cna_card() return hardware.HardwareSupport.MAINLINE else: LOG.debug('No Intel CNA network card found') return hardware.HardwareSupport.NONE