join-ns: add join-ns zdtm test

Signed-off-by: Deng Guangxing <dengguangxing@huawei.com>
Signed-off-by: Pavel Emelyanov <xemul@virtuozzo.com>

test/zdtm.py

@@ -617,6 +617,7 @@ test_classes = { 'zdtm': zdtm_test, 'inhfd': inhfd_test, 'groups': groups_test }
 #
 
 criu_bin = "../criu/criu"
+join_ns_file = '/run/netns/zdtm_netns'
 class criu_cli:
 	def __init__(self, opts):
 		self.__test = None
@@ -625,6 +626,7 @@ class criu_cli:
 		self.__prev_dump_iter = None
 		self.__page_server = (opts['page_server'] and True or False)
 		self.__restore_sibling = (opts['sibling'] and True or False)
+		self.__join_ns = (opts['join_ns'] and True or False)
 		self.__fault = (opts['fault'])
 		self.__script = opts['script']
 		self.__sat = (opts['sat'] and True or False)
@@ -763,6 +765,9 @@ class criu_cli:
 			r_opts = ["--restore-sibling"]
 			self.__test.auto_reap = False
 		r_opts += self.__test.getropts()
+		if self.__join_ns:
+			r_opts.append("--join-ns")
+			r_opts.append("net:%s" % join_ns_file)
 
 		self.__prev_dump_iter = None
 		criu_dir = os.path.dirname(os.getcwd())
@@ -1087,7 +1092,7 @@ class launcher:
 
 		nd = ('nocr', 'norst', 'pre', 'iters', 'page_server', 'sibling', \
 				'fault', 'keep_img', 'report', 'snaps', 'sat', 'script', \
-				'dedup', 'sbs', 'freezecg', 'user', 'dry_run')
+				'join_ns', 'dedup', 'sbs', 'freezecg', 'user', 'dry_run')
 		arg = repr((name, desc, flavor, { d: self.__opts[d] for d in nd }))
 
 		if self.__use_log:
@@ -1259,6 +1264,14 @@ def run_tests(opts):
 		print "Parallel launch with freezer not supported"
 		opts['parallel'] = None
 
+	if opts['join_ns']:
+		print "[WARNING] Option --join-ns will skip ns and uns flavors, and some socket related tests."
+		r = re.compile('^(?!.*sock).*$')
+		torun = filter(lambda x: r.match(x), torun)
+		opts['keep_going'] = True
+		run_all = True
+		subprocess.Popen(["ip", "netns", "add", "zdtm_netns"])
+
 	l = launcher(opts, len(torun))
 	try:
 		for t in torun:
@@ -1311,13 +1324,18 @@ def run_tests(opts):
 				# FIXME -- probably uns will make sense
 				run_flavs -= set(['ns', 'uns'])
 
+			#remove ns and uns flavor in join_ns
+			if opts['join_ns']:
+				run_flavs -= set(['ns', 'uns'])
+
 			if run_flavs:
 				l.run_test(t, tdesc, run_flavs)
 			else:
 				l.skip(t, "no flavors")
 	finally:
 		l.finish()
-
+		if opts['join_ns']:
+			subprocess.Popen(["ip", "netns", "delete", "zdtm_netns"])
 
 sti_fmt = "%-40s%-10s%s"
 
@@ -1497,6 +1515,7 @@ rp.add_argument("-f", "--flavor", help = "Flavor to run")
 rp.add_argument("-x", "--exclude", help = "Exclude tests from --all run", action = 'append')
 
 rp.add_argument("--sibling", help = "Restore tests as siblings", action = 'store_true')
+rp.add_argument("--join-ns", help = "Restore tests and join existing namespace", action = 'store_true')
 rp.add_argument("--pre", help = "Do some pre-dumps before dump (n[:pause])")
 rp.add_argument("--snaps", help = "Instead of pre-dumps do full dumps", action = 'store_true')
 rp.add_argument("--dedup", help = "Auto-deduplicate images on iterations", action = 'store_true')