55 lines
1.9 KiB
Python
55 lines
1.9 KiB
Python
# Copyright 2022 Red Hat, Inc.
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# All Rights Reserved.
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#
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# Licensed under the Apache License, Version 2.0 (the "License"); you may
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# not use this file except in compliance with the License. You may obtain
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# 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, WITHOUT
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# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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# License for the specific language governing permissions and limitations
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# under the License.
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import collections
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from neutron.agent.linux import utils as linux_utils
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from neutron.privileged.agent.linux import devlink as priv_devlink
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PortIndex = collections.namedtuple(
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'PortIndex', ['name', 'pf_pci', 'pf_num', 'vf_num', 'is_parent'])
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def get_port(port_name):
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"""Retrieves the devlink port information, including the PF name."""
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ports = priv_devlink.get_port_list()
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# Build port index, with PF reference and VF index.
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port_indexes = []
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ret = None
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for port in ports:
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pf_pci = linux_utils.get_attr(port, 'DEVLINK_ATTR_DEV_NAME')
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name = linux_utils.get_attr(port, 'DEVLINK_ATTR_PORT_NETDEV_NAME')
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index = linux_utils.get_attr(port, 'DEVLINK_ATTR_PORT_INDEX')
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pf_num = index >> 16
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is_parent = index & 0xFFFF == 0xFFFF
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vf_num = linux_utils.get_attr(port, 'DEVLINK_ATTR_PORT_PCI_VF_NUMBER')
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port_indexes.append(PortIndex(name, pf_pci, pf_num, vf_num, is_parent))
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if name == port_name:
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ret = {'pf_pci': pf_pci,
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'pf_num': pf_num,
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'pf_name': None,
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'vf_num': vf_num,
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'vf_name': name,
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}
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if ret:
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for port in port_indexes:
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if port.pf_num == ret['pf_num'] and port.is_parent:
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ret['pf_name'] = port.name
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return ret
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