Commit a13fedbe authored by Brenda J. Butler's avatar Brenda J. Butler Committed by David S. Miller

tools: tc-testing: nsPlugin

Move the functionality of creating a namespace before the test suite
and destroying it afterwards to a plugin.
Signed-off-by: default avatarBrenda J. Butler <bjb@mojatatu.com>
Acked-by: default avatarLucas Bates <lucasb@mojatatu.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent f6926e85
import os
import signal
from string import Template
import subprocess
import time
from TdcPlugin import TdcPlugin
from tdc_config import *
class SubPlugin(TdcPlugin):
def __init__(self):
self.sub_class = 'ns/SubPlugin'
super().__init__()
def pre_suite(self, testcount, testidlist):
'''run commands before test_runner goes into a test loop'''
super().pre_suite(testcount, testidlist)
if self.args.namespace:
self._ns_create()
def post_suite(self, index):
'''run commands after test_runner goes into a test loop'''
super().post_suite(index)
if self.args.verbose:
print('{}.post_suite'.format(self.sub_class))
if self.args.namespace:
self._ns_destroy()
def add_args(self, parser):
super().add_args(parser)
self.argparser_group = self.argparser.add_argument_group(
'netns',
'options for nsPlugin(run commands in net namespace)')
self.argparser_group.add_argument(
'-n', '--namespace', action='store_true',
help='Run commands in namespace')
return self.argparser
def adjust_command(self, stage, command):
super().adjust_command(stage, command)
cmdform = 'list'
cmdlist = list()
if not self.args.namespace:
return command
if self.args.verbose:
print('{}.adjust_command'.format(self.sub_class))
if not isinstance(command, list):
cmdform = 'str'
cmdlist = command.split()
else:
cmdlist = command
if stage == 'setup' or stage == 'execute' or stage == 'verify' or stage == 'teardown':
if self.args.verbose:
print('adjust_command: stage is {}; inserting netns stuff in command [{}] list [{}]'.format(stage, command, cmdlist))
cmdlist.insert(0, self.args.NAMES['NS'])
cmdlist.insert(0, 'exec')
cmdlist.insert(0, 'netns')
cmdlist.insert(0, 'ip')
else:
pass
if cmdform == 'str':
command = ' '.join(cmdlist)
else:
command = cmdlist
if self.args.verbose:
print('adjust_command: return command [{}]'.format(command))
return command
def _ns_create(self):
'''
Create the network namespace in which the tests will be run and set up
the required network devices for it.
'''
if self.args.namespace:
cmd = 'ip netns add {}'.format(self.args.NAMES['NS'])
self._exec_cmd('pre', cmd)
cmd = 'ip link add $DEV0 type veth peer name $DEV1'
self._exec_cmd('pre', cmd)
cmd = 'ip link set $DEV1 netns {}'.format(self.args.NAMES['NS'])
self._exec_cmd('pre', cmd)
cmd = 'ip link set $DEV0 up'
self._exec_cmd('pre', cmd)
cmd = 'ip -n {} link set $DEV1 up'.format(self.args.NAMES['NS'])
self._exec_cmd('pre', cmd)
if self.args.device:
cmd = 'ip link set $DEV2 netns {}'.format(self.args.NAMES['NS'])
self._exec_cmd('pre', cmd)
cmd = 'ip -n {} link set $DEV2 up'.format(self.args.NAMES['NS'])
self._exec_cmd('pre', cmd)
def _ns_destroy(self):
'''
Destroy the network namespace for testing (and any associated network
devices as well)
'''
if self.args.namespace:
cmd = 'ip netns delete {}'.format(self.args.NAMES['NS'])
self._exec_cmd('post', cmd)
def _exec_cmd(self, stage, command):
'''
Perform any required modifications on an executable command, then run
it in a subprocess and return the results.
'''
if '$' in command:
command = self._replace_keywords(command)
self.adjust_command(stage, command)
if self.args.verbose:
print('_exec_cmd: command "{}"'.format(command))
proc = subprocess.Popen(command,
shell=True,
stdout=subprocess.PIPE,
stderr=subprocess.PIPE,
env=ENVIR)
(rawout, serr) = proc.communicate()
if proc.returncode != 0 and len(serr) > 0:
foutput = serr.decode("utf-8")
else:
foutput = rawout.decode("utf-8")
proc.stdout.close()
proc.stderr.close()
return proc, foutput
def _replace_keywords(self, cmd):
"""
For a given executable command, substitute any known
variables contained within NAMES with the correct values
"""
tcmd = Template(cmd)
subcmd = tcmd.safe_substitute(self.args.NAMES)
return subcmd
......@@ -23,8 +23,6 @@ from tdc_helper import *
import TdcPlugin
USE_NS = True
class PluginMgr:
def __init__(self, argparser):
super().__init__()
......@@ -107,16 +105,13 @@ def replace_keywords(cmd):
return subcmd
def exec_cmd(args, pm, stage, command, nsonly=True):
def exec_cmd(args, pm, stage, command):
"""
Perform any required modifications on an executable command, then run
it in a subprocess and return the results.
"""
if len(command.strip()) == 0:
return None, None
if (USE_NS and nsonly):
command = 'ip netns exec $NS ' + command
if '$' in command:
command = replace_keywords(command)
......@@ -265,39 +260,6 @@ def test_runner(pm, args, filtered_tests):
return tap
def ns_create(args, pm):
"""
Create the network namespace in which the tests will be run and set up
the required network devices for it.
"""
if (USE_NS):
cmd = 'ip netns add $NS'
exec_cmd(args, pm, 'pre', cmd, False)
cmd = 'ip link add $DEV0 type veth peer name $DEV1'
exec_cmd(args, pm, 'pre', cmd, False)
cmd = 'ip link set $DEV1 netns $NS'
exec_cmd(args, pm, 'pre', cmd, False)
cmd = 'ip link set $DEV0 up'
exec_cmd(args, pm, 'pre', cmd, False)
cmd = 'ip -n $NS link set $DEV1 up'
exec_cmd(args, pm, 'pre', cmd, False)
cmd = 'ip link set $DEV2 netns $NS'
exec_cmd(args, pm, 'pre', cmd, False)
cmd = 'ip -n $NS link set $DEV2 up'
exec_cmd(args, pm, 'pre', cmd, False)
def ns_destroy(args, pm):
"""
Destroy the network namespace for testing (and any associated network
devices as well)
"""
if (USE_NS):
cmd = 'ip netns delete $NS'
exec_cmd(args, pm, 'post', cmd, False)
def has_blank_ids(idlist):
"""
Search the list for empty ID fields and return true/false accordingly.
......@@ -579,17 +541,12 @@ def set_operation_mode(pm, args):
list_test_cases(alltests)
exit(0)
ns_create(args, pm)
if len(alltests):
catresults = test_runner(pm, args, alltests)
else:
catresults = 'No tests found\n'
print('All test results: \n\n{}'.format(catresults))
ns_destroy(args, pm)
def main():
"""
Start of execution; set up argument parser and get the arguments,
......
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