1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
|
# 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 logging
import re
import itertools
import six
NETWORK_KERNEL = 'network_kernel'
NETWORK_DPDK = 'network_dpdk'
NETWORK_OTHER = 'network_other'
CRYPTO_KERNEL = 'crypto_kernel'
CRYPTO_DPDK = 'crypto_dpdk'
CRYPTO_OTHER = 'crypto_other'
LOG = logging.getLogger(__name__)
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.from_iterable(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_addresses, driver, force=True):
# accept single PCI or list of PCI
if isinstance(pci_addresses, six.string_types):
pci_addresses = [pci_addresses]
cmd = self.DPDK_BIND_CMD.format(dpdk_nic_bind=self._dpdk_nic_bind,
driver=driver,
vpci=' '.join(list(pci_addresses)),
force='--force' if force else '')
LOG.debug(cmd)
self._dpdk_execute(cmd)
# update the inner status dict
self.read_status()
def save_used_drivers(self):
# invert the map, so we can bind by driver type
self.used_drivers = {}
# sort for stabililty
for vpci, driver in sorted(self.interface_driver_map.items()):
self.used_drivers.setdefault(driver, []).append(vpci)
def rebind_drivers(self, force=True):
for driver, vpcis in self.used_drivers.items():
self.bind(vpcis, driver, force)
|