tests: zebra netlink testcases

[mirror_frr.git] / tests / topotests / zebra_netlink / test_zebra_netlink.py

diff --git a/tests/topotests/zebra_netlink/test_zebra_netlink.py b/tests/topotests/zebra_netlink/test_zebra_netlink.py
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+++ b/tests/topotests/zebra_netlink/test_zebra_netlink.py
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+#!/usr/bin/env python
+
+#
+# test_zebra_netlink.py
+#
+# Copyright (c) 2020 by
+#
+# Permission to use, copy, modify, and/or distribute this software
+# for any purpose with or without fee is hereby granted, provided
+# that the above copyright notice and this permission notice appear
+# in all copies.
+#
+# THE SOFTWARE IS PROVIDED "AS IS" AND NETDEF DISCLAIMS ALL WARRANTIES
+# WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+# MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL NETDEF BE LIABLE FOR
+# ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY
+# DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS,
+# WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS
+# ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE
+# OF THIS SOFTWARE.
+#
+
+"""
+test_zebra_netlink.py: Test some basic interactions with kernel using Netlink
+
+"""
+
+import os
+import re
+import sys
+import pytest
+import json
+import platform
+from functools import partial
+
+# Save the Current Working Directory to find configuration files.
+CWD = os.path.dirname(os.path.realpath(__file__))
+sys.path.append(os.path.join(CWD, "../"))
+
+# pylint: disable=C0413
+# Import topogen and topotest helpers
+from lib import topotest
+from lib.topogen import Topogen, TopoRouter, get_topogen
+from lib.topolog import logger
+from lib.common_config import shutdown_bringup_interface
+
+# Required to instantiate the topology builder class.
+from mininet.topo import Topo
+
+#####################################################
+##
+##   Network Topology Definition
+##
+#####################################################
+
+
+class ZebraTopo(Topo):
+    "Test topology builder"
+
+    def build(self, *_args, **_opts):
+        "Build function"
+        tgen = get_topogen(self)
+
+        tgen.add_router("r1")
+
+        # Create a empty network for router 1
+        switch = tgen.add_switch("s1")
+        switch.add_link(tgen.gears["r1"])
+
+
+#####################################################
+##
+##   Tests starting
+##
+#####################################################
+
+
+def setup_module(mod):
+    "Sets up the pytest environment"
+    tgen = Topogen(ZebraTopo, mod.__name__)
+    tgen.start_topology()
+
+    router_list = tgen.routers()
+    for rname, router in router_list.iteritems():
+        router.load_config(
+            TopoRouter.RD_ZEBRA, os.path.join(CWD, "{}/zebra.conf".format(rname))
+        )
+
+        router.load_config(
+            TopoRouter.RD_SHARP, os.path.join(CWD, "{}/sharpd.conf".format(rname))
+        )
+
+    # Initialize all routers.
+    tgen.start_router()
+
+
+def teardown_module(_mod):
+    "Teardown the pytest environment"
+    tgen = get_topogen()
+
+    # This function tears down the whole topology.
+    tgen.stop_topology()
+
+
+def test_zebra_netlink_batching():
+    "Test the situation where dataplane fills netlink send buffer entirely."
+    logger.info(
+        "Test the situation where dataplane fills netlink send buffer entirely."
+    )
+    tgen = get_topogen()
+    if tgen.routers_have_failure():
+        ptyest.skip("skipped because of preview test failure")
+    r1 = tgen.gears["r1"]
+
+    # Reduce the size of the buffer to hit the limit.
+    r1.vtysh_cmd("conf t\nzebra kernel netlink batch-tx-buf 256 256")
+
+    r1.vtysh_cmd("sharp install routes 2.1.3.7 nexthop 192.168.1.1 100")
+    json_file = "{}/r1/v4_route.json".format(CWD)
+    expected = json.loads(open(json_file).read())
+    test_func = partial(topotest.router_json_cmp, r1, "show ip route json", expected,)
+    _, result = topotest.run_and_expect(test_func, None, count=2, wait=0.5)
+    assertmsg = '"r1" JSON output mismatches'
+    assert result is None, assertmsg
+
+    r1.vtysh_cmd("sharp remove routes 2.1.3.7 100")
+
+
+if __name__ == "__main__":
+    args = ["-s"] + sys.argv[1:]
+    sys.exit(pytest.main(args))