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authorBrenda J. Butler <bjb@mojatatu.com>2018-02-14 14:09:23 -0500
committerDavid S. Miller <davem@davemloft.net>2018-02-15 15:38:33 -0500
commita13fedbe56fef141aff7d584eba2a08daaf613cc (patch)
tree97bff2cb9e944aed67e134bf7af1747119d72e07 /tools/testing/selftests/tc-testing/plugin-lib
parenttools: tc-testing: rootPlugin (diff)
downloadlinux-dev-a13fedbe56fef141aff7d584eba2a08daaf613cc.tar.xz
linux-dev-a13fedbe56fef141aff7d584eba2a08daaf613cc.zip
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: Brenda J. Butler <bjb@mojatatu.com> Acked-by: Lucas Bates <lucasb@mojatatu.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'tools/testing/selftests/tc-testing/plugin-lib')
-rw-r--r--tools/testing/selftests/tc-testing/plugin-lib/nsPlugin.py141
1 files changed, 141 insertions, 0 deletions
diff --git a/tools/testing/selftests/tc-testing/plugin-lib/nsPlugin.py b/tools/testing/selftests/tc-testing/plugin-lib/nsPlugin.py
new file mode 100644
index 000000000000..a194b1af2b30
--- /dev/null
+++ b/tools/testing/selftests/tc-testing/plugin-lib/nsPlugin.py
@@ -0,0 +1,141 @@
+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