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# Copyright (c) 2016-2017 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 re
import itertools
NETWORK_KERNEL = 'network_kernel'
NETWORK_DPDK = 'network_dpdk'
NETWORK_OTHER = 'network_other'
CRYPTO_KERNEL = 'crypto_kernel'
CRYPTO_DPDK = 'crypto_dpdk'
CRYPTO_OTHER = 'crypto_other'
class DpdkBindHelperException(Exception):
pass
class DpdkBindHelper(object):
DPDK_STATUS_CMD = "{dpdk_nic_bind} --status"
DPDK_BIND_CMD = "sudo {dpdk_nic_bind} {force} -b {driver} {vpci}"
NIC_ROW_RE = re.compile("([^ ]+) '([^']+)' (?:if=([^ ]+) )?drv=([^ ]+) "
"unused=([^ ]*)(?: (\*Active\*))?")
SKIP_RE = re.compile('(====|<none>|^$)')
NIC_ROW_FIELDS = ['vpci', 'dev_type', 'iface', 'driver', 'unused', 'active']
HEADER_DICT_PAIRS = [
(re.compile('^Network.*DPDK.*$'), NETWORK_DPDK),
(re.compile('^Network.*kernel.*$'), NETWORK_KERNEL),
(re.compile('^Other network.*$'), NETWORK_OTHER),
(re.compile('^Crypto.*DPDK.*$'), CRYPTO_DPDK),
(re.compile('^Crypto.*kernel$'), CRYPTO_KERNEL),
(re.compile('^Other crypto.*$'), CRYPTO_OTHER),
]
def clean_status(self):
self.dpdk_status = {
NETWORK_KERNEL: [],
NETWORK_DPDK: [],
CRYPTO_KERNEL: [],
CRYPTO_DPDK: [],
NETWORK_OTHER: [],
CRYPTO_OTHER: [],
}
def __init__(self, ssh_helper):
self.dpdk_status = None
self.status_nic_row_re = None
self._dpdk_nic_bind_attr = None
self._status_cmd_attr = None
self.ssh_helper = ssh_helper
self.clean_status()
def _dpdk_execute(self, *args, **kwargs):
res = self.ssh_helper.execute(*args, **kwargs)
if res[0] != 0:
raise DpdkBindHelperException('{} command failed with rc={}'.format(
self._dpdk_nic_bind, res[0]))
return res
@property
def _dpdk_nic_bind(self):
if self._dpdk_nic_bind_attr is None:
self._dpdk_nic_bind_attr = self.ssh_helper.provision_tool(tool_file="dpdk-devbind.py")
return self._dpdk_nic_bind_attr
@property
def _status_cmd(self):
if self._status_cmd_attr is None:
self._status_cmd_attr = self.DPDK_STATUS_CMD.format(dpdk_nic_bind=self._dpdk_nic_bind)
return self._status_cmd_attr
def _addline(self, active_list, line):
if active_list is None:
return
res = self.NIC_ROW_RE.match(line)
if res is None:
return
new_data = {k: v for k, v in zip(self.NIC_ROW_FIELDS, res.groups())}
new_data['active'] = bool(new_data['active'])
self.dpdk_status[active_list].append(new_data)
@classmethod
def _switch_active_dict(cls, a_row, active_dict):
for regexp, a_dict in cls.HEADER_DICT_PAIRS:
if regexp.match(a_row):
return a_dict
return active_dict
def parse_dpdk_status_output(self, input):
active_dict = None
self.clean_status()
for a_row in input.splitlines():
if self.SKIP_RE.match(a_row):
continue
active_dict = self._switch_active_dict(a_row, active_dict)
self._addline(active_dict, a_row)
return self.dpdk_status
def _get_bound_pci_addresses(self, active_dict):
return [iface['vpci'] for iface in self.dpdk_status[active_dict]]
@property
def dpdk_bound_pci_addresses(self):
return self._get_bound_pci_addresses(NETWORK_DPDK)
@property
def kernel_bound_pci_addresses(self):
return self._get_bound_pci_addresses(NETWORK_KERNEL)
@property
def interface_driver_map(self):
return {interface['vpci']: interface['driver']
for interface in itertools.chain(*self.dpdk_status.values())}
def read_status(self):
return self.parse_dpdk_status_output(self._dpdk_execute(self._status_cmd)[1])
def bind(self, pci, driver, force=True):
cmd = self.DPDK_BIND_CMD.format(dpdk_nic_bind=self._dpdk_nic_bind,
driver=driver,
vpci=' '.join(list(pci)),
force='--force' if force else '')
self._dpdk_execute(cmd)
# update the inner status dict
self.read_status()
def save_used_drivers(self):
self.used_drivers = self.interface_driver_map
def rebind_drivers(self, force=True):
for vpci, driver in self.used_drivers.items():
self.bind(vpci, driver, force)
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