selftests: tc-testing: drop '-N' argument from nsPlugin

This argument would bypass the net namespace creation and run the test in
the root namespace, even if nsPlugin was specified.
Drop it as it's the same as commenting out the nsPlugin from a test and adds
additional complexity to the plugin code.
Signed-off-by: Pedro Tammela <pctammela@mojatatu.com>
Reviewed-by: Simon Horman <horms@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

tools/testing/selftests/tc-testing/plugin-lib/nsPlugin.py

@@ -28,10 +28,7 @@ def prepare_suite(obj, test):
     shadow['DEV2'] = original['DEV2']
     obj.args.NAMES = shadow
 
-    if obj.args.namespace:
     obj._ns_create()
-    else:
-        obj._ports_create()
 
     # Make sure the netns is visible in the fs
     while True:
@@ -75,10 +72,7 @@ class SubPlugin(TdcPlugin):
         if self.args.verbose:
             print('{}.post_case'.format(self.sub_class))
 
-        if self.args.namespace:
         self._ns_destroy()
-        else:
-            self._ports_destroy()
 
     def post_suite(self, index):
         if self.args.verbose:
@@ -93,24 +87,11 @@ class SubPlugin(TdcPlugin):
 
             subprocess.run(cmd, shell=True, stdout=subprocess.DEVNULL, stderr=subprocess.DEVNULL)
 
-    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', '--no-namespace', action='store_false', default=True,
-            dest='namespace', help='Don\'t 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))
 
@@ -144,8 +125,6 @@ class SubPlugin(TdcPlugin):
         cmds.append(self._replace_keywords('link add $DEV0 type veth peer name $DEV1'))
         cmds.append(self._replace_keywords('link set $DEV0 up'))
         cmds.append(self._replace_keywords('link add $DUMMY type dummy'))
-        if not self.args.namespace:
-            cmds.append(self._replace_keywords('link set $DEV1 up'))
 
         return cmds
 
@@ -161,7 +140,6 @@ class SubPlugin(TdcPlugin):
     def _ns_create_cmds(self):
         cmds = []
 
-        if self.args.namespace:
         ns = self.args.NAMES['NS']
 
         cmds.append(self._replace_keywords('netns add {}'.format(ns)))
@@ -192,7 +170,6 @@ class SubPlugin(TdcPlugin):
         Destroy the network namespace for testing (and any associated network
         devices as well)
         '''
-        if self.args.namespace:
         self._exec_cmd('post', self._ns_destroy_cmd())
         self._ports_destroy()