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Sat, 02 Aug 2025 02:24:52 -0700 (PDT) Received: from 7950hx ([43.129.244.20]) by smtp.gmail.com with ESMTPSA id d2e1a72fcca58-76bd7887522sm4799161b3a.20.2025.08.02.02.24.48 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sat, 02 Aug 2025 02:24:52 -0700 (PDT) From: Menglong Dong X-Google-Original-From: Menglong Dong To: edumazet@google.com, kuniyu@google.com Cc: ncardwell@google.com, davem@davemloft.net, dsahern@kernel.org, kuba@kernel.org, pabeni@redhat.com, horms@kernel.org, shuah@kernel.org, kraig@google.com, linux-kernel@vger.kernel.org, netdev@vger.kernel.org, linux-kselftest@vger.kernel.org Subject: [PATCH net v3 2/2] selftests/net: test TCP reuseport socket selection Date: Sat, 2 Aug 2025 17:24:35 +0800 Message-ID: <20250802092435.288714-3-dongml2@chinatelecom.cn> X-Mailer: git-send-email 2.50.1 In-Reply-To: <20250802092435.288714-1-dongml2@chinatelecom.cn> References: <20250802092435.288714-1-dongml2@chinatelecom.cn> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" The test script is provided by Kuniyuki in [1], which is used to test the selection of the TCP reuseport socket problem. Link: https://lore.kernel.org/netdev/20250801040757.1599996-1-kuniyu@google= .com/ [1] Signed-off-by: Menglong Dong --- tools/testing/selftests/net/Makefile | 1 + tools/testing/selftests/net/tcp_reuseport.py | 36 ++++++++++++++++++++ 2 files changed, 37 insertions(+) create mode 100755 tools/testing/selftests/net/tcp_reuseport.py diff --git a/tools/testing/selftests/net/Makefile b/tools/testing/selftests= /net/Makefile index b31a71f2b372..0f4c3eea9709 100644 --- a/tools/testing/selftests/net/Makefile +++ b/tools/testing/selftests/net/Makefile @@ -117,6 +117,7 @@ TEST_GEN_FILES +=3D tfo TEST_PROGS +=3D tfo_passive.sh TEST_PROGS +=3D broadcast_pmtu.sh TEST_PROGS +=3D ipv6_force_forwarding.sh +TEST_PROGS +=3D tcp_reuseport.py =20 # YNL files, must be before "include ..lib.mk" YNL_GEN_FILES :=3D busy_poller netlink-dumps diff --git a/tools/testing/selftests/net/tcp_reuseport.py b/tools/testing/s= elftests/net/tcp_reuseport.py new file mode 100755 index 000000000000..eaeb7096382e --- /dev/null +++ b/tools/testing/selftests/net/tcp_reuseport.py @@ -0,0 +1,36 @@ +#!/usr/bin/env python3 +# SPDX-License-Identifier: GPL-2.0 + +import os + +from lib.py import ksft_run, ksft_exit +from socket import * + +def test_reuseport_select() -> None: + s1 =3D socket() + s1.setsockopt(SOL_SOCKET, SO_REUSEPORT, 1) + s1.setsockopt(SOL_SOCKET, SO_BINDTODEVICE, b'lo') + s1.listen() + s1.setblocking(False) + + s2 =3D socket() + s2.setsockopt(SOL_SOCKET, SO_REUSEPORT, 1) + s2.bind(s1.getsockname()) + s2.listen() + s2.setblocking(False) + + for i in range(3): + c =3D socket() + c.connect(s1.getsockname()) + try: + print("SUCCESS: assigned properly:", s1.accept()) + except: + print("FAIL: wrong assignment") + os.sys.exit(1) + +def main() -> None: + ksft_run([test_reuseport_select]) + ksft_exit() + +if __name__ =3D=3D "__main__": + main() --=20 2.50.1