365 lines
12 KiB
Python
365 lines
12 KiB
Python
# -*- coding: utf-8 -*-
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# Copyright 2014 Red Hat, Inc.
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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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#
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# The sriov_config.py module does the SR-IOV PF configuration.
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# It'll be invoked by the sriov_config systemd service for the persistence of
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# the SR-IOV configuration across reboots. And os-net-config:utils also invokes
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# it for the first time configuration.
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# An entry point os-net-config-sriov is added for invocation of this module.
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import argparse
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import logging
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import os
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import pyudev
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import re
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from six.moves import queue as Queue
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import sys
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import yaml
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from oslo_concurrency import processutils
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logger = logging.getLogger(__name__)
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_SYS_CLASS_NET = '/sys/class/net'
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_UDEV_RULE_FILE = '/etc/udev/rules.d/70-persistent-net.rules'
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# Create a queue for passing the udev network events
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vf_queue = Queue.Queue()
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# File to contain the list of SR-IOV PF, VF and their configurations
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# Format of the file shall be
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# - device_type: pf
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# name: <pf name>
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# numvfs: <number of VFs>
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# promisc: "on"/"off"
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# - device_type: vf
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# device:
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# name: <pf name>
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# vfid: <VF id>
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# name: <vf name>
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# vlan_id: <vlan>
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# qos: <qos>
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# spoofcheck: "on"/"off"
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# trust: "on"/"off"
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# state: "auto"/"enable"/"disable"
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# macaddr: <mac address>
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# promisc: "on"/"off"
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_SRIOV_CONFIG_FILE = '/var/lib/os-net-config/sriov_config.yaml'
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class SRIOVNumvfsException(ValueError):
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pass
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def udev_event_handler(action, device):
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event = {"action": action, "device": device.sys_path}
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logger.info("Received udev event %s for %s"
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% (event["action"], event["device"]))
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vf_queue.put(event)
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def get_file_data(filename):
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if not os.path.exists(filename):
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return ''
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try:
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with open(filename, 'r') as f:
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return f.read()
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except IOError:
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logger.error("Error reading file: %s" % filename)
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return ''
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def _get_sriov_map():
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contents = get_file_data(_SRIOV_CONFIG_FILE)
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sriov_map = yaml.safe_load(contents) if contents else []
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return sriov_map
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def configure_sriov_pf():
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# Create a context for pyudev and observe udev events for network
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context = pyudev.Context()
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monitor = pyudev.Monitor.from_netlink(context)
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monitor.filter_by('net')
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observer = pyudev.MonitorObserver(monitor, udev_event_handler)
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observer.start()
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sriov_map = _get_sriov_map()
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MLNX_UNBIND_FILE_PATH = "/sys/bus/pci/drivers/mlx5_core/unbind"
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MLNX_VENDOR_ID = "0x15b3"
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for item in sriov_map:
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if item['device_type'] == 'pf':
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_pf_interface_up(item)
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try:
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sriov_numvfs_path = ("/sys/class/net/%s/device/sriov_numvfs"
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% item['name'])
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with open(sriov_numvfs_path, 'w') as f:
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f.write("%d" % item['numvfs'])
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except IOError as exc:
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msg = ("Unable to configure pf: %s with numvfs: %d\n%s"
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% (item['name'], item['numvfs'], exc))
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raise SRIOVNumvfsException(msg)
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# Wait for the creation of VFs for each PF
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_wait_for_vf_creation(item['name'], item['numvfs'])
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# Configure switchdev mode
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vendor_id = get_vendor_id(item['name'])
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if (item.get('link_mode') == "switchdev" and
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vendor_id == MLNX_VENDOR_ID):
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vf_pcis_list = get_vf_pcis_list(item['name'])
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for vf_pci in vf_pcis_list:
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vf_pci_path = "/sys/bus/pci/devices/%s/driver" % vf_pci
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if os.path.exists(vf_pci_path):
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with open(MLNX_UNBIND_FILE_PATH, 'w') as f:
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f.write("%s" % vf_pci)
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# Adding a udev rule to save the sriov_pf name
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add_udev_rule_for_sriov_pf(item['name'])
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add_udev_rule_for_vf_representors()
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configure_switchdev(item['name'])
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if_up_interface(item['name'])
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observer.stop()
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def _wait_for_vf_creation(pf_name, numvfs):
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vf_count = 0
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vf_list = []
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while vf_count < numvfs:
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try:
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# wait for 5 seconds after every udev event
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event = vf_queue.get(True, 5)
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vf_name = os.path.basename(event["device"])
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pf_path = os.path.normpath(os.path.join(event["device"],
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"../../physfn/net"))
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if os.path.isdir(pf_path):
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pf_nic = os.listdir(pf_path)
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if len(pf_nic) == 1 and pf_name == pf_nic[0]:
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if vf_name not in vf_list:
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vf_list.append(vf_name)
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logger.info("VF: %s created for PF: %s"
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% (vf_name, pf_name))
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vf_count = vf_count + 1
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else:
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logger.error("Unable to parse event %s" % event["device"])
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else:
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logger.error("%s is not a directory" % pf_path)
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except Queue.Empty:
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logger.info("Timeout in the creation of VFs for PF %s" % pf_name)
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return
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logger.info("Required VFs are created for PF %s" % pf_name)
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def add_udev_rule_for_sriov_pf(pf_name):
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pf_pci = get_pf_pci(pf_name)
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udev_data_line = 'SUBSYSTEM=="net", ACTION=="add", DRIVERS=="?*", '\
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'KERNELS=="%s", NAME="%s"\n' % (pf_pci, pf_name)
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add_udev_rule(udev_data_line, _UDEV_RULE_FILE)
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def add_udev_rule_for_vf_representors():
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udev_data_line = 'SUBSYSTEM=="net", ACTION=="add", ATTR{phys_switch_id}'\
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'!="", ATTR{phys_port_name}=="pf*vf*", '\
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'NAME="$attr{phys_port_name}"\n'
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add_udev_rule(udev_data_line, _UDEV_RULE_FILE)
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def add_udev_rule(udev_data, udev_file):
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if not os.path.exists(udev_file):
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with open(udev_file, "w") as f:
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f.write(udev_data)
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reload_udev_rules()
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else:
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file_data = get_file_data(udev_file)
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if udev_data not in file_data:
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with open(udev_file, "a") as f:
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f.write(udev_data)
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reload_udev_rules()
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def reload_udev_rules():
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try:
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processutils.execute('/usr/sbin/udevadm', 'control', '--reload-rules')
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except processutils.ProcessExecutionError:
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logger.error("Failed to reload udev rules")
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raise
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def configure_switchdev(pf_name):
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pf_pci = get_pf_pci(pf_name)
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pf_device_id = get_pf_device_id(pf_name)
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if pf_device_id == "0x1013" or pf_device_id == "0x1015":
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try:
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processutils.execute('/usr/sbin/devlink', 'dev', 'eswitch', 'set',
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'pci/%s' % pf_pci, 'inline-mode', 'transport')
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except processutils.ProcessExecutionError:
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logger.error("Failed to set inline-mode to transport")
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raise
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try:
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processutils.execute('/usr/sbin/devlink', 'dev', 'eswitch', 'set',
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'pci/%s' % pf_pci, 'mode', 'switchdev')
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except processutils.ProcessExecutionError:
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logger.error("Failed to set mode to switchdev")
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raise
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try:
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processutils.execute('/usr/sbin/ethtool', '-K', pf_name,
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'hw-tc-offload', 'on')
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except processutils.ProcessExecutionError:
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logger.error("Failed to enable hw-tc-offload")
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raise
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def run_ip_config_cmd(*cmd, **kwargs):
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logger.info("Running %s" % ' '.join(cmd))
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try:
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processutils.execute(*cmd, **kwargs)
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except processutils.ProcessExecutionError:
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logger.error("Failed to execute %s" % ' '.join(cmd))
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raise
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def _pf_interface_up(pf_device):
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if 'promisc' in pf_device:
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run_ip_config_cmd('ip', 'link', 'set', 'dev', pf_device['name'],
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'promisc', pf_device['promisc'])
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logger.info("Bringing up PF: %s" % pf_device['name'])
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run_ip_config_cmd('ip', 'link', 'set', 'dev', pf_device['name'], 'up')
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def get_vendor_id(ifname):
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try:
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with open(os.path.join(_SYS_CLASS_NET, ifname, "device/vendor"),
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'r') as f:
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out = f.read().strip()
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return out
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except IOError:
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return
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def get_pf_pci(pf_name):
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pf_pci_path = os.path.join(_SYS_CLASS_NET, pf_name, "device/uevent")
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pf_info = get_file_data(pf_pci_path)
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pf_pci = re.search(r'PCI_SLOT_NAME=(.*)', pf_info, re.MULTILINE).group(1)
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return pf_pci
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def get_pf_device_id(pf_name):
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pf_device_path = os.path.join(_SYS_CLASS_NET, pf_name, "device/device")
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pf_device_id = get_file_data(pf_device_path).strip()
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return pf_device_id
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def get_vf_pcis_list(pf_name):
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vf_pcis_list = []
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listOfPfFiles = os.listdir(os.path.join(_SYS_CLASS_NET, pf_name,
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"device"))
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for pf_file in listOfPfFiles:
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if pf_file.startswith("virtfn"):
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vf_info = get_file_data(os.path.join(_SYS_CLASS_NET, pf_name,
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"device", pf_file, "uevent"))
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vf_pcis_list.append(re.search(r'PCI_SLOT_NAME=(.*)',
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vf_info, re.MULTILINE).group(1))
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return vf_pcis_list
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def if_up_interface(device):
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logger.info("Running /sbin/ifup %s" % device)
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try:
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processutils.execute('/sbin/ifup', device)
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except processutils.ProcessExecutionError:
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logger.error("Failed to ifup %s" % device)
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raise
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def configure_sriov_vf():
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sriov_map = _get_sriov_map()
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for item in sriov_map:
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if item['device_type'] == 'vf':
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pf_name = item['device']['name']
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vfid = item['device']['vfid']
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base_cmd = ('ip', 'link', 'set', 'dev', pf_name, 'vf', str(vfid))
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logger.info("Configuring settings for PF: %s VF :%d VF name : %s"
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% (pf_name, vfid, item['name']))
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if 'macaddr' in item:
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cmd = base_cmd + ('mac', item['macaddr'])
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run_ip_config_cmd(*cmd)
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if 'vlan_id' in item:
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vlan_cmd = base_cmd + ('vlan', str(item['vlan_id']))
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if 'qos' in item:
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vlan_cmd = vlan_cmd + ('qos', str(item['qos']))
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run_ip_config_cmd(*vlan_cmd)
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if 'spoofcheck' in item:
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cmd = base_cmd + ('spoofchk', item['spoofcheck'])
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run_ip_config_cmd(*cmd)
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if 'state' in item:
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cmd = base_cmd + ('state', item['state'])
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run_ip_config_cmd(*cmd)
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if 'trust' in item:
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cmd = base_cmd + ('trust', item['trust'])
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run_ip_config_cmd(*cmd)
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if 'promisc' in item:
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run_ip_config_cmd('ip', 'link', 'set', 'dev', item['name'],
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'promisc', item['promisc'])
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def parse_opts(argv):
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parser = argparse.ArgumentParser(
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description='Configure SR-IOV PF and VF interfaces using a YAML'
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' config file format.')
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parser.add_argument(
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'-d', '--debug',
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dest="debug",
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action='store_true',
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help="Print debugging output.",
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required=False)
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parser.add_argument(
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'-v', '--verbose',
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dest="verbose",
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action='store_true',
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help="Print verbose output.",
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required=False)
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opts = parser.parse_args(argv[1:])
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return opts
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def configure_logger(verbose=False, debug=False):
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LOG_FORMAT = '[%(asctime)s] [%(levelname)s] %(message)s'
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DATE_FORMAT = '%Y/%m/%d %I:%M:%S %p'
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log_level = logging.WARN
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if debug:
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log_level = logging.DEBUG
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elif verbose:
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log_level = logging.INFO
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logging.basicConfig(format=LOG_FORMAT, datefmt=DATE_FORMAT,
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level=log_level)
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def main(argv=sys.argv):
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opts = parse_opts(argv)
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configure_logger(opts.verbose, opts.debug)
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# Configure the PF's
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configure_sriov_pf()
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# Configure the VFs
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configure_sriov_vf()
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if __name__ == '__main__':
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sys.exit(main(sys.argv))
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