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# Copyright 2016 Mellanox Technologies, Ltd
#
# 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_log import log
from ironic_python_agent import errors
from ironic_python_agent import hardware
from ironic_python_agent import netutils
LOG = log.getLogger()
# Mellanox NIC Vendor ID
MLNX_VENDOR_ID = '0x15b3'
# Mellanox Prefix to generate InfiniBand CLient-ID
MLNX_INFINIBAND_CLIENT_ID_PREFIX = 'ff:00:00:00:00:00:02:00:00:02:c9:00:'
def _infiniband_address_to_mac(address):
"""Convert InfiniBand address to MAC
Convert InfiniBand address to MAC by Mellanox specific
translation. The InfiniBand address is 59 characters
composed from GID:GUID. The last 24 characters are the
GUID. The InfiniBand MAC is upper 10 characters and lower
9 characters from the GUID
Example:
address - a0:00:00:27:fe:80:00:00:00:00:00:00:7c:fe:90:03:00:29:26:52
GUID - 7c:fe:90:03:00:29:26:52
InfiniBand MAC - 7c:fe:90:29:26:52
:param address: InfiniBand Address.
:returns: InfiniBand MAC.
"""
return address[36:-14] + address[51:]
def _generate_client_id(address):
"""Generate client id from InfiniBand address
:param address: InfiniBand address.
:returns: client id.
"""
return MLNX_INFINIBAND_CLIENT_ID_PREFIX + address[36:]
def _detect_hardware():
"""method for detection of Mellanox NICs
:returns: Boolean value. True if the machine contain one
or more Mellanox NIC(s), False otherwise.
"""
iface_names = os.listdir('/sys/class/net')
for ifname in iface_names:
if (hardware._get_device_info(
ifname, 'net', 'vendor') == MLNX_VENDOR_ID):
return True
return False
class MellanoxDeviceHardwareManager(hardware.HardwareManager):
"""Mellanox hardware manager to support a single device"""
HARDWARE_MANAGER_NAME = 'MellanoxDeviceHardwareManager'
HARDWARE_MANAGER_VERSION = '1'
def evaluate_hardware_support(self):
"""Declare level of hardware support provided."""
if _detect_hardware():
LOG.debug('Found Mellanox device')
return hardware.HardwareSupport.MAINLINE
else:
LOG.debug('No Mellanox devices found')
return hardware.HardwareSupport.NONE
def get_interface_info(self, interface_name):
"""Return the interface information when its Mellanox and InfiniBand
In case of Mellanox and InfiniBand interface we do the following:
1. Calculate the "InfiniBand MAC" according to InfiniBand GUID
2. Calculate the client-id according to InfiniBand GUID
"""
address = netutils.get_mac_addr(interface_name)
if address is None:
raise errors.IncompatibleHardwareMethodError()
vendor = hardware._get_device_info(interface_name, 'net', 'vendor')
if (len(address) != netutils.INFINIBAND_ADDR_LEN
or vendor != MLNX_VENDOR_ID):
raise errors.IncompatibleHardwareMethodError()
mac_addr = _infiniband_address_to_mac(address)
client_id = _generate_client_id(address)
return hardware.NetworkInterface(
interface_name, mac_addr,
ipv4_address=netutils.get_ipv4_addr(interface_name),
has_carrier=netutils.interface_has_carrier(interface_name),
lldp=None,
vendor=vendor,
product=hardware._get_device_info(interface_name, 'net', 'device'),
client_id=client_id)
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