89 lines
3.2 KiB
Python
89 lines
3.2 KiB
Python
# Copyright (C) 2016 Intel Corporation
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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import os
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from oslo_concurrency import processutils
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from oslo_config import cfg
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from oslo_log import log
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from ironic_python_agent import hardware
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from ironic_python_agent import utils
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LOG = log.getLogger()
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CONF = cfg.CONF
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def _detect_cna_card():
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addr_path = '/sys/class/net'
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for net_dev in os.listdir(addr_path):
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link_path = '{}/{}/device/driver/module'.format(addr_path, net_dev)
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try:
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out = utils.execute('readlink', '-v', link_path)
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except OSError as e:
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LOG.warning('Something went wrong when readlink for '
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'interface %(device)s. Error: %(error)s',
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{'device': net_dev, 'error': e})
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continue
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except processutils.ProcessExecutionError as e:
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LOG.debug('Get driver for interface %(device)s failed. '
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'Error: %(error)s',
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{'device': net_dev, 'error': e})
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continue
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driver_name = os.path.basename(out[0].strip())
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if driver_name == 'i40e':
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return True
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return False
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def _disable_embedded_lldp_agent_in_cna_card():
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addr_path = '/sys/kernel/debug/i40e'
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failed_dirs = []
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if os.path.exists(addr_path):
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addr_dirs = os.listdir(addr_path)
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else:
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LOG.warning('Driver i40e was not loaded properly')
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return
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for inner_dir in addr_dirs:
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try:
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command_path = '{}/{}/command'.format(addr_path, inner_dir)
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with open(command_path, 'w') as command_file:
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command_file.write('lldp stop')
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except (OSError, IOError):
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failed_dirs.append(inner_dir)
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continue
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if failed_dirs:
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LOG.warning('Failed to disable the embedded LLDP on Intel CNA network '
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'card. Addresses of failed pci devices: {}'
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.format(str(failed_dirs).strip('[]')))
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class IntelCnaHardwareManager(hardware.HardwareManager):
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HARDWARE_MANAGER_NAME = 'IntelCnaHardwareManager'
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HARDWARE_MANAGER_VERSION = '1.0'
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def evaluate_hardware_support(self):
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if _detect_cna_card():
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LOG.debug('Found Intel CNA network card')
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# On Intel CNA cards, in order to make LLDP info collecting
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# possible, the embedded LLDP agent, which runs inside that
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# card, needs to be turned off.
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if CONF.collect_lldp:
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LOG.info('Disable CNA network card embedded lldp agent now')
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_disable_embedded_lldp_agent_in_cna_card()
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return hardware.HardwareSupport.MAINLINE
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else:
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LOG.debug('No Intel CNA network card found')
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return hardware.HardwareSupport.NONE
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