net-test: add test for congestion control sysctls am: 2cd9b42078 am: 0fbfcc6183 am: a22161c49b am: 351ab4736e

Original change: https://android-review.googlesource.com/c/kernel/tests/+/1650427

Change-Id: Id44ae5f3f48411bcd9afdac6592cd203b11d8ae3

1 files changed, 43 insertions, 0 deletions

diff --git a/net/test/sysctls_test.py b/net/test/sysctls_test.py
new file mode 100755
index 0000000..4b71f39
--- /dev/null
+++ b/net/test/sysctls_test.py
@@ -0,0 +1,43 @@
+#!/usr/bin/python
+#
+# Copyright 2021 The Android Open Source Project
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+# http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+import unittest
+
+import net_test
+
+
+class SysctlsTest(net_test.NetworkTest):
+
+  def check(self, f):
+    algs = open(f).readline().strip().split(' ')
+    bad_algs = [a for a in algs if a not in ['bbr', 'bbr2', 'cubic', 'reno']]
+    msg = ("Obsolete TCP congestion control algorithm found. These "
+           "algorithms will decrease real-world networking performance for "
+           "users and must be disabled. Found: %s" % bad_algs)
+    self.assertEqual(bad_algs, [], msg)
+
+  def testAllowedCongestionControl(self):
+    self.check('/proc/sys/net/ipv4/tcp_allowed_congestion_control')
+
+  def testAvailableCongestionControl(self):
+    self.check('/proc/sys/net/ipv4/tcp_available_congestion_control')
+
+  def testCongestionControl(self):
+    self.check('/proc/sys/net/ipv4/tcp_congestion_control')
+
+
+if __name__ == "__main__":
+  unittest.main()