Initial commit: Linux kernel 4.19 for Unplugged OS

tools/testing/selftests/tc-testing/plugin-lib/README-PLUGINS

@@ -0,0 +1,27 @@
+tdc.py will look for plugins in a directory plugins off the cwd.
+Make a set of numbered symbolic links from there to the actual plugins.
+Eg:
+
+tdc.py
+plugin-lib/
+plugins/
+    __init__.py
+    10-rootPlugin.py -> ../plugin-lib/rootPlugin.py
+    20-valgrindPlugin.py -> ../plugin-lib/valgrindPlugin.py
+    30-nsPlugin.py -> ../plugin-lib/nsPlugin.py
+
+
+tdc.py will find them and use them.
+
+
+rootPlugin
+    Check if the uid is root.  If not, bail out.
+
+valgrindPlugin
+    Run the command under test with valgrind, and produce an extra set of TAP results for the memory tests.
+    This plugin will write files to the cwd, called vgnd-xxx.log.  These will contain
+    the valgrind output for test xxx.  Any file matching the glob 'vgnd-*.log' will be
+    deleted at the end of the run.
+
+nsPlugin
+    Run all the commands in a network namespace.

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

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

@@ -0,0 +1,19 @@
+import os
+import sys
+from TdcPlugin import TdcPlugin
+
+from tdc_config import *
+
+
+class SubPlugin(TdcPlugin):
+    def __init__(self):
+        self.sub_class = 'root/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 os.geteuid():
+            print('This script must be run with root privileges', file=sys.stderr)
+            exit(1)

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

@@ -0,0 +1,142 @@
+'''
+run the command under test, under valgrind and collect memory leak info
+as a separate test.
+'''
+
+
+import os
+import re
+import signal
+from string import Template
+import subprocess
+import time
+from TdcPlugin import TdcPlugin
+
+from tdc_config import *
+
+def vp_extract_num_from_string(num_as_string_maybe_with_commas):
+    return int(num_as_string_maybe_with_commas.replace(',',''))
+
+class SubPlugin(TdcPlugin):
+    def __init__(self):
+        self.sub_class = 'valgrind/SubPlugin'
+        self.tap = ''
+        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.verbose > 1:
+            print('{}.pre_suite'.format(self.sub_class))
+        if self.args.valgrind:
+            self._add_to_tap('1..{}\n'.format(self.testcount))
+
+    def post_suite(self, index):
+        '''run commands after test_runner goes into a test loop'''
+        super().post_suite(index)
+        self._add_to_tap('\n|---\n')
+        if self.args.verbose > 1:
+            print('{}.post_suite'.format(self.sub_class))
+        print('{}'.format(self.tap))
+        if self.args.verbose < 4:
+            subprocess.check_output('rm -f vgnd-*.log', shell=True)
+
+    def add_args(self, parser):
+        super().add_args(parser)
+        self.argparser_group = self.argparser.add_argument_group(
+            'valgrind',
+            'options for valgrindPlugin (run command under test under Valgrind)')
+
+        self.argparser_group.add_argument(
+            '-V', '--valgrind', action='store_true',
+            help='Run commands under valgrind')
+
+        return self.argparser
+
+    def adjust_command(self, stage, command):
+        super().adjust_command(stage, command)
+        cmdform = 'list'
+        cmdlist = list()
+
+        if not self.args.valgrind:
+            return command
+
+        if self.args.verbose > 1:
+            print('{}.adjust_command'.format(self.sub_class))
+
+        if not isinstance(command, list):
+            cmdform = 'str'
+            cmdlist = command.split()
+        else:
+            cmdlist = command
+
+        if stage == 'execute':
+            if self.args.verbose > 1:
+                print('adjust_command:  stage is {}; inserting valgrind stuff in command [{}] list [{}]'.
+                      format(stage, command, cmdlist))
+            cmdlist.insert(0, '--track-origins=yes')
+            cmdlist.insert(0, '--show-leak-kinds=definite,indirect')
+            cmdlist.insert(0, '--leak-check=full')
+            cmdlist.insert(0, '--log-file=vgnd-{}.log'.format(self.args.testid))
+            cmdlist.insert(0, '-v')  # ask for summary of non-leak errors
+            cmdlist.insert(0, ENVIR['VALGRIND_BIN'])
+        else:
+            pass
+
+        if cmdform == 'str':
+            command = ' '.join(cmdlist)
+        else:
+            command = cmdlist
+
+        if self.args.verbose > 1:
+            print('adjust_command:  return command [{}]'.format(command))
+        return command
+
+    def post_execute(self):
+        if not self.args.valgrind:
+            return
+
+        self.definitely_lost_re = re.compile(
+            r'definitely lost:\s+([,0-9]+)\s+bytes in\s+([,0-9]+)\sblocks', re.MULTILINE | re.DOTALL)
+        self.indirectly_lost_re = re.compile(
+            r'indirectly lost:\s+([,0-9]+)\s+bytes in\s+([,0-9]+)\s+blocks', re.MULTILINE | re.DOTALL)
+        self.possibly_lost_re = re.compile(
+            r'possibly lost:\s+([,0-9]+)bytes in\s+([,0-9]+)\s+blocks', re.MULTILINE | re.DOTALL)
+        self.non_leak_error_re = re.compile(
+            r'ERROR SUMMARY:\s+([,0-9]+) errors from\s+([,0-9]+)\s+contexts', re.MULTILINE | re.DOTALL)
+
+        def_num = 0
+        ind_num = 0
+        pos_num = 0
+        nle_num = 0
+
+        # what about concurrent test runs?  Maybe force them to be in different directories?
+        with open('vgnd-{}.log'.format(self.args.testid)) as vfd:
+            content = vfd.read()
+            def_mo = self.definitely_lost_re.search(content)
+            ind_mo = self.indirectly_lost_re.search(content)
+            pos_mo = self.possibly_lost_re.search(content)
+            nle_mo = self.non_leak_error_re.search(content)
+
+            if def_mo:
+                def_num = int(def_mo.group(2))
+            if ind_mo:
+                ind_num = int(ind_mo.group(2))
+            if pos_mo:
+                pos_num = int(pos_mo.group(2))
+            if nle_mo:
+                nle_num = int(nle_mo.group(1))
+
+        mem_results = ''
+        if (def_num > 0) or (ind_num > 0) or (pos_num > 0) or (nle_num > 0):
+            mem_results += 'not '
+
+        mem_results += 'ok {} - {}-mem # {}\n'.format(
+            self.args.test_ordinal, self.args.testid, 'memory leak check')
+        self._add_to_tap(mem_results)
+        if mem_results.startswith('not '):
+            print('{}'.format(content))
+            self._add_to_tap(content)
+
+    def _add_to_tap(self, more_tap_output):
+        self.tap += more_tap_output