1 # Copyright 2016-2017 Intel Corporation.
3 # Licensed under the Apache License, Version 2.0 (the "License");
4 # you may not use this file except in compliance with the License.
5 # You may obtain a copy of the License at
7 # http://www.apache.org/licenses/LICENSE-2.0
9 # Unless required by applicable law or agreed to in writing, software
10 # distributed under the License is distributed on an "AS IS" BASIS,
11 # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12 # See the License for the specific language governing permissions and
13 # limitations under the License.
15 """Various helper functions
22 from conf import settings as S
29 # pylint: disable=too-many-branches
30 def settings_update_paths():
31 """ Configure paths to OVS, DPDK and QEMU sources and binaries based on
32 selected vswitch type and src/binary switch. Data are taken from
33 PATHS dictionary and after their processing they are stored inside TOOLS.
34 PATHS dictionary has specific section for 'vswitch', 'qemu' and 'dpdk'
35 Following processing is done for every item:
36 item 'type' - string, which defines the type of paths ('src' or 'bin') to be selected
38 'src' means, that VSPERF will use OVS, DPDK or QEMU built from sources
39 e.g. by execution of systems/build_base_machine.sh script during VSPERF
41 'bin' means, that VSPERF will use OVS, DPDK or QEMU binaries installed
42 in the OS, e.g. via OS specific packaging system
43 item 'path' - string with valid path; Its content is checked for existence, prefixed
44 with section name and stored into TOOLS for later use
45 e.g. TOOLS['dpdk_src'] or TOOLS['vswitch_src']
46 item 'modules' - list of strings; Every value from given list is checked for '.ko'
47 suffix. In case it matches and it is not an absolute path to the module, then
48 module name is prefixed with 'path' defined for the same section
49 e.g. TOOLS['vswitch_modules'] = [
50 '/tmp/vsperf/src_vanilla/ovs/ovs/datapath/linux/openvswitch.ko']
51 all other items - string - if given string is a relative path and item 'path'
52 is defined for a given section, then item content will be prefixed with
53 content of the 'path'. Otherwise tool name will be searched within
54 standard system directories. Also any OS filename wildcards will be
55 expanded to the real path. At the end of processing, every absolute
56 path is checked for its existence. In case that temporary path (i.e. path
57 with '_tmp' suffix) doesn't exist, then log will be written and vsperf will
58 continue. If any other path will not exist, then vsperf execution will
59 be terminated with runtime error.
61 Note: In case that 'bin' type is set for DPDK, then TOOLS['dpdk_src'] will be set to
62 the value of PATHS['dpdk']['src']['path']. The reason is, that VSPERF uses downloaded
63 DPDK sources to copy DPDK and testpmd into the GUEST, where testpmd is built. In case,
64 that DPDK sources are not available, then vsperf will continue with test execution,
65 but testpmd can't be used as a guest loopback. This is useful in case, that other guest
66 loopback applications (e.g. buildin) are used by CI jobs, etc.
68 # set dpdk and ovs paths according to VNF, VSWITCH and TRAFFICGEN selection
70 if S.getValue("mode") != 'trafficgen':
71 # VSWITCH & (probably) VNF are needed
72 vswitch_type = S.getValue('PATHS')['vswitch'][S.getValue('VSWITCH')]['type']
73 paths['vswitch'] = S.getValue('PATHS')['vswitch'][S.getValue('VSWITCH')][vswitch_type]
74 paths['dpdk'] = S.getValue('PATHS')['dpdk'][S.getValue('PATHS')['dpdk']['type']]
75 paths['qemu'] = S.getValue('PATHS')['qemu'][S.getValue('PATHS')['qemu']['type']]
77 paths['paths']['ovs_var_tmp'] = S.getValue('PATHS')['vswitch']['ovs_var_tmp']
78 paths['paths']['ovs_etc_tmp'] = S.getValue('PATHS')['vswitch']['ovs_etc_tmp']
80 if S.getValue("mode") != 'trafficgen-off':
81 # TRAFFCIGEN is required
82 if S.getValue('TRAFFICGEN') in S.getValue('PATHS')['trafficgen']:
83 tmp_trafficgen = S.getValue('PATHS')['trafficgen'][S.getValue('TRAFFICGEN')]
84 paths['trafficgen'] = tmp_trafficgen[tmp_trafficgen['type']]
87 # pylint: disable=too-many-nested-blocks
88 for path_class in paths:
89 for tool in paths[path_class]:
90 tmp_tool = paths[path_class][tool]
92 # store valid path of given class into tools dict
94 if os.path.isdir(tmp_tool):
95 tools['{}_src'.format(path_class)] = tmp_tool
98 raise RuntimeError('Path {} does not exist.'.format(tmp_tool))
100 # store list of modules of given class into tools dict
101 if tool == 'modules':
103 for module in tmp_tool:
104 # add path to the .ko modules and check it for existence
105 if module.endswith('.ko') and not os.path.isabs(module):
106 module = os.path.join(paths[path_class]['path'], module)
107 if not os.path.exists(module):
108 raise RuntimeError('Cannot locate modlue {}'.format(module))
110 tmp_modules.append(module)
112 tools['{}_modules'.format(path_class)] = tmp_modules
115 # if path to the tool is relative, then 'path' will be prefixed
116 # in case that 'path' is not defined, then tool will be searched
117 # within standard system paths
118 if not os.path.isabs(tmp_tool):
119 if 'path' in paths[path_class]:
120 tmp_tool = os.path.join(paths[path_class]['path'], tmp_tool)
121 elif shutil.which(tmp_tool):
122 tmp_tool = shutil.which(tmp_tool)
124 raise RuntimeError('Cannot locate tool {}'.format(tmp_tool))
126 # expand OS wildcards in paths if needed
127 if glob.has_magic(tmp_tool):
128 tmp_glob = glob.glob(tmp_tool)
129 if len(tmp_glob) == 0:
130 raise RuntimeError('Path to the {} is not valid: {}.'.format(tool, tmp_tool))
131 elif len(tmp_glob) > 1:
132 raise RuntimeError('Path to the {} is ambiguous {}'.format(tool, tmp_glob))
133 elif len(tmp_glob) == 1:
134 tmp_tool = tmp_glob[0]
135 elif not os.path.exists(tmp_tool):
136 if tool.endswith('_tmp'):
137 logging.getLogger().debug('Temporary path to the %s does not '
138 'exist: %s', tool, tmp_tool)
140 raise RuntimeError('Path to the {} is not valid: {}'.format(tool, tmp_tool))
142 tools[tool] = tmp_tool
144 # ensure, that dpkg_src for bin will be set to downloaded DPDK sources, so it can
145 # be copied to the guest share dir and used by GUEST to build and run testpmd
146 # Validity of the path is not checked by purpose, so user can use VSPERF without
147 # downloading DPDK sources. In that case guest loopback can't be set to 'testpmd'
148 if S.getValue('PATHS')['dpdk']['type'] == 'bin':
149 tools['dpdk_src'] = S.getValue('PATHS')['dpdk']['src']['path']
151 S.setValue('TOOLS', tools)
153 def check_traffic(traffic):
154 """Check traffic definition and correct it if possible.
156 # check if requested networking layers make sense
157 if traffic['l4']['enabled']:
158 if not traffic['l3']['enabled']:
159 raise RuntimeError('TRAFFIC misconfiguration: l3 must be enabled '
162 # check if multistream configuration makes sense
163 if traffic['multistream']:
164 if traffic['stream_type'] == 'L3':
165 if not traffic['l3']['enabled']:
166 raise RuntimeError('TRAFFIC misconfiguration: l3 must be '
167 'enabled if l3 streams are requested.')
168 if traffic['stream_type'] == 'L4':
169 if not traffic['l4']['enabled']:
170 raise RuntimeError('TRAFFIC misconfiguration: l4 must be '
171 'enabled if l4 streams are requested.')
173 # in case of UDP ports we have only 65536 (0-65535) unique options
174 if traffic['multistream'] > MAX_L4_FLOWS:
175 logging.getLogger().warning(
176 'Requested amount of L4 flows %s is bigger than number of '
177 'transport protocol ports. It was set to %s.',
178 traffic['multistream'], MAX_L4_FLOWS)
179 traffic['multistream'] = MAX_L4_FLOWS