From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from fhigh-b6-smtp.messagingengine.com (fhigh-b6-smtp.messagingengine.com [202.12.124.157]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id CEDB629D265 for ; Thu, 11 Jun 2026 19:31:24 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=202.12.124.157 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1781206286; cv=none; b=fmJtPw6I18kbLU2vp55AYwM6jczvEN05nwFlwwFkRZq6sfyDXS3eZDs5zERD1UFz7V4XxaLuoGTNS5gtWa1vedWNH53ivT8C8/NpLU1mMAalxe2VVc+/6WUw1w41T+I4M4P4oM03lR3ObQK2RYYiOGRPgHPvvBtYTrDjbZOn1v4= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1781206286; c=relaxed/simple; bh=Yqu0mHzY+Hgc7NwbXzAp9GDpFyPfjq+2WWa6a53ui4c=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=F+RVffc9EtjRQU+l8ZJGwD2Ib0NKDuAaqOc7GoyPkJ/eBcQ4GO045lXqlaWtC5tOzQydP6GfHies2TQJsPfQo4ZH9kYK/Rt7ftNRHQbVMaArFFMGwNo959aEia/5AP01IHuIITp2dTczkoIySDy8UghXF/hGE1N+9/aN6iw+nd0= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=fastmail.im; spf=pass smtp.mailfrom=fastmail.im; dkim=pass (2048-bit key) header.d=fastmail.im header.i=@fastmail.im header.b=bIvZF/ft; dkim=pass (2048-bit key) header.d=messagingengine.com header.i=@messagingengine.com header.b=Z3O4e9dC; arc=none smtp.client-ip=202.12.124.157 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=fastmail.im Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=fastmail.im Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=fastmail.im header.i=@fastmail.im header.b="bIvZF/ft"; dkim=pass (2048-bit key) header.d=messagingengine.com header.i=@messagingengine.com header.b="Z3O4e9dC" Received: from phl-compute-01.internal (phl-compute-01.internal [10.202.2.41]) by mailfhigh.stl.internal (Postfix) with ESMTP id CD7D97A00E0; Thu, 11 Jun 2026 15:31:23 -0400 (EDT) Received: from phl-frontend-04 ([10.202.2.163]) by phl-compute-01.internal (MEProxy); Thu, 11 Jun 2026 15:31:24 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=fastmail.im; h= cc:cc:content-transfer-encoding:content-type:date:date:from:from :in-reply-to:in-reply-to:message-id:mime-version:references :reply-to:subject:subject:to:to; s=fm1; t=1781206283; x= 1781292683; bh=EQAIfiQCUq/FU8PweCVTmrgAPbZKdxBVTAgsobyjDUU=; b=b IvZF/ftn0sQYkFjRsuy/hG9QPn5j1Ebb9cwypfzW7Fag0ijpdGVqjDFo2o6UJdb1 ThN3EU3aavLVXtvOlgYgQ8LTDEuaD3wzwGBJlwbMvGdgsExYcqj4YNdbVFK2//Od kkhST6ttg/6gcXVG6JzQcelQB0QpLjgecafW7vMszP4dihF6e8bo0qdTF22HMBVw e6yKBxlC/W6x5zWTN/4Br+MP5nJL2ZHCIEB59rpW/cie4Kjwu2ZnjN/Q/4jfF4uS gcm5qtJN7mBOtZfCWWHfSCs38SIi7mA9jDrroMVeD/RTsA/A3MzDDfpx7WaEKsuX 4hepuZo841t3AudKToTYQ== DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d= messagingengine.com; h=cc:cc:content-transfer-encoding :content-type:date:date:feedback-id:feedback-id:from:from :in-reply-to:in-reply-to:message-id:mime-version:references :reply-to:subject:subject:to:to:x-me-proxy:x-me-sender :x-me-sender:x-sasl-enc; s=fm1; t=1781206283; x=1781292683; bh=E QAIfiQCUq/FU8PweCVTmrgAPbZKdxBVTAgsobyjDUU=; b=Z3O4e9dCoHT6jH0Yp 0C9Olpi6UKp2l5eDEoLmxSogOal5o0lhbBr4/3BD8DP60nHDDajnePTBx0VroQ3D NT/yOe+7/A6BiCyqm9F/wnwQIZANzf4y9oUF8YR45BUiJ+xsqSGNjo1nI3SYJABM +a5GjLJIze9pwy+wfOz6izlpIKFOA9Royq2Rj1A84MJT0JDEu2CZMzA44Alg2V2a HxwR8Aa0wZtIp1b/O4uJo7MIwhTS8yLi3Eg7+6HC8TfiSp0splYdj0WdnpAGY61N 4789JtOV4a3QmkiTVc8Z0SDZ4UnCQaJP0AK8AWgWrvKsjZXxQUMxVVzRG97E44Ot 6ilJw== X-ME-Sender: X-ME-Received: X-ME-Proxy-Cause: dmFkZTElDtKTZfl5mw59UBLLPrW8aIITHryvQ2nPkfR7IXQ9ce1folsZykrD4I9OVTdkfp PMWjjl6nkuUXhLPbzt3qohwu1pOBTiStMWOIUcSQ2JhziTT8P9Z7ptkabt25QYIUJA0UOb FtEClpW4Bxy5E5GbhcVpSAvd39BhalKdENFIjjg5M8mt9vzdyTxQPQIawEj0TawS+6EvUM 3lb7CKhsn8uOyh1x6Nvw7C8IYqOO5CnLcYyVOQsMYJzI/yQEl4fZJSdk+e4k9YEIKrgg0p HjAxpNruOba/po3Nzd3U9dYI01SxZs0DBy/ExNAPd5vx4HhDPE+V7c+PMN+ehBtEKt0AF6 YkSCkMsw5AzzRDvfipH26AbNVFHNd87s+7hhxTmzuGGcZew9td7Ab3Nk8o/wbNvEDwUA7S f1uYz7NzSkbyedpdXOrPYm/qfWPo8I+AA9c5PV/15+E45myhE+LbbJzT2eUZUX1KPo6Akz H7ZRy71vYwx8LjFUb0T5x9MWMZSPDk/aiLSIqNQvpbiaR6dytyhG6xXlwnj3c1KgXu2Onm ZmPyPRdx3msvz1Utb52lIa+9wD4h1rT24DEXPOwltFRcF88SM/m+P/nasafSwSXnfPccc5 nAU8c6rLRuitVZ0n19dbI2J3m6+BFBFVcUXu0xjgPQKKv7ZSIZZwKGtAzRLg X-ME-Proxy: Feedback-ID: i559e4809:Fastmail Received: by mail.messagingengine.com (Postfix) with ESMTPA; Thu, 11 Jun 2026 15:31:22 -0400 (EDT) From: Alice Mikityanska To: Daniel Borkmann , "David S. Miller" , Eric Dumazet , Jakub Kicinski , Paolo Abeni , Xin Long , Willem de Bruijn , Willem de Bruijn , David Ahern , Nikolay Aleksandrov Cc: Shuah Khan , Stanislav Fomichev , Andrew Lunn , Simon Horman , Florian Westphal , netdev@vger.kernel.org, Alice Mikityanska Subject: [PATCH net-next v7 11/11] selftests: net: Add a test for BIG TCP in UDP tunnels Date: Thu, 11 Jun 2026 21:29:55 +0200 Message-ID: <20260611192955.604661-12-alice.kernel@fastmail.im> X-Mailer: git-send-email 2.54.0 In-Reply-To: <20260611192955.604661-1-alice.kernel@fastmail.im> References: <20260611192955.604661-1-alice.kernel@fastmail.im> Precedence: bulk X-Mailing-List: netdev@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit From: Alice Mikityanska The test sets up VXLAN and GENEVE tunnels over IPv4 and IPv6 and runs IPv4 and IPv6 traffic through them with BIG TCP enabled. It checks that a non-negligible amount of big aggregated packets are seen in tcpdump. Signed-off-by: Alice Mikityanska Reviewed-by: Willem de Bruijn --- tools/testing/selftests/net/Makefile | 1 + .../testing/selftests/net/big_tcp_tunnels.sh | 151 ++++++++++++++++++ 2 files changed, 152 insertions(+) create mode 100755 tools/testing/selftests/net/big_tcp_tunnels.sh diff --git a/tools/testing/selftests/net/Makefile b/tools/testing/selftests/net/Makefile index 6a190a525a39..9b97aedd8058 100644 --- a/tools/testing/selftests/net/Makefile +++ b/tools/testing/selftests/net/Makefile @@ -13,6 +13,7 @@ TEST_PROGS := \ arp_ndisc_untracked_subnets.sh \ bareudp.sh \ big_tcp.sh \ + big_tcp_tunnels.sh \ bind_bhash.sh \ bpf_offload.py \ bridge_stp_mode.sh \ diff --git a/tools/testing/selftests/net/big_tcp_tunnels.sh b/tools/testing/selftests/net/big_tcp_tunnels.sh new file mode 100755 index 000000000000..792a27fcd56d --- /dev/null +++ b/tools/testing/selftests/net/big_tcp_tunnels.sh @@ -0,0 +1,151 @@ +#!/usr/bin/env bash +# SPDX-License-Identifier: GPL-2.0 +# +# Testing for IPv4 and IPv6 BIG TCP over VXLAN and GENEVE tunnels. + +SERVER_NS=$(mktemp -u server-XXXXXXXX) +SERVER_IP4="192.168.1.1" +SERVER_IP6="2001:db8::1:1" +SERVER_IP4_TUN="192.168.2.1" +SERVER_IP6_TUN="2001:db8::2:1" + +CLIENT_NS=$(mktemp -u client-XXXXXXXX) +CLIENT_IP4="192.168.1.2" +CLIENT_IP6="2001:db8::1:2" +CLIENT_IP4_TUN="192.168.2.2" +CLIENT_IP6_TUN="2001:db8::2:2" + +: "${PACKETS_THRESHOLD:=5000}" + +# Kselftest framework requirement - SKIP code is 4. +ksft_skip=4 + +setup() { + ip netns add "$SERVER_NS" + ip netns add "$CLIENT_NS" + ip -netns "$SERVER_NS" link add link1 type veth peer name link0 netns "$CLIENT_NS" + + ip -netns "$CLIENT_NS" link set link0 up + ip -netns "$CLIENT_NS" addr replace "$CLIENT_IP4/24" dev link0 + ip -netns "$CLIENT_NS" addr replace "$CLIENT_IP6/112" dev link0 nodad + ip -netns "$CLIENT_NS" link set link0 \ + gso_max_size 196608 gso_ipv4_max_size 196608 \ + gro_max_size 196608 gro_ipv4_max_size 196608 + ip -netns "$SERVER_NS" link set link1 up + ip -netns "$SERVER_NS" addr replace "$SERVER_IP4/24" dev link1 + ip -netns "$SERVER_NS" addr replace "$SERVER_IP6/112" dev link1 nodad + ip -netns "$SERVER_NS" link set link1 \ + gso_max_size 196608 gso_ipv4_max_size 196608 \ + gro_max_size 196608 gro_ipv4_max_size 196608 + + ip netns exec "$SERVER_NS" netserver >/dev/null +} + +setup_tunnel() { + if [ "$2" = 4 ]; then + SERVER_IP="$SERVER_IP4" + CLIENT_IP="$CLIENT_IP4" + echo "Setting up ${1^^} over IPv4" + else + SERVER_IP="$SERVER_IP6" + CLIENT_IP="$CLIENT_IP6" + echo "Setting up ${1^^} over IPv6" + fi + + if [ "$1" = vxlan ]; then + ip -netns "$CLIENT_NS" link add tun0 type vxlan \ + id 5001 remote "$SERVER_IP" local "$CLIENT_IP" dev link0 dstport 4789 + else + ip -netns "$CLIENT_NS" link add tun0 type geneve \ + id 5001 remote "$SERVER_IP" + fi + ip -netns "$CLIENT_NS" link set tun0 up + ip -netns "$CLIENT_NS" addr replace "$CLIENT_IP4_TUN/24" dev tun0 + ip -netns "$CLIENT_NS" addr replace "$CLIENT_IP6_TUN/112" dev tun0 nodad + ip -netns "$CLIENT_NS" link set tun0 \ + gso_max_size 196608 gso_ipv4_max_size 196608 \ + gro_max_size 196608 gro_ipv4_max_size 196608 + if [ "$1" = vxlan ]; then + ip -netns "$SERVER_NS" link add tun1 type vxlan \ + id 5001 remote "$CLIENT_IP" local "$SERVER_IP" dev link1 dstport 4789 + else + ip -netns "$SERVER_NS" link add tun1 type geneve \ + id 5001 remote "$CLIENT_IP" + fi + ip -netns "$SERVER_NS" link set tun1 up + ip -netns "$SERVER_NS" addr replace "$SERVER_IP4_TUN/24" dev tun1 + ip -netns "$SERVER_NS" addr replace "$SERVER_IP6_TUN/112" dev tun1 nodad + ip -netns "$SERVER_NS" link set tun1 \ + gso_max_size 196608 gso_ipv4_max_size 196608 \ + gro_max_size 196608 gro_ipv4_max_size 196608 +} + +cleanup_tunnel() { + ip -netns "$CLIENT_NS" link del tun0 + ip -netns "$SERVER_NS" link del tun1 +} + +cleanup() { + ip netns pids "$SERVER_NS" | xargs -r kill + ip netns pids "$CLIENT_NS" | xargs -r kill + ip netns del "$SERVER_NS" + ip netns del "$CLIENT_NS" +} + +do_test() { + exec 3< <(ip netns exec "$SERVER_NS" tcpdump -nn -i link1 greater 65536 2> /dev/null) + TCPDUMP_SERVER_PID="$!" + exec 4< <(wc -l <&3) + exec 5< <(ip netns exec "$CLIENT_NS" tcpdump -nn -i link0 greater 65536 2> /dev/null) + TCPDUMP_CLIENT_PID="$!" + exec 6< <(wc -l <&5) + + if [ "$1" = 4 ]; then + SERVER_IP="$SERVER_IP4_TUN" + echo "Running IPv4 traffic in the tunnel" + else + SERVER_IP="$SERVER_IP6_TUN" + echo "Running IPv6 traffic in the tunnel" + fi + + ip netns exec "$CLIENT_NS" netperf -t TCP_STREAM -l 5 -H "$SERVER_IP" -- \ + -m 80000 > /dev/null + kill "$TCPDUMP_SERVER_PID" "$TCPDUMP_CLIENT_PID" + wait "$TCPDUMP_SERVER_PID" "$TCPDUMP_CLIENT_PID" + PACKETS_SERVER=$(cat <&4) + PACKETS_CLIENT=$(cat <&6) + exec 3>&- 4>&- 5>&- 6>&- + + # One line is empty, each packet is two lines (inner and outer). + echo "Captured BIG TCP GRO packets: $(((PACKETS_SERVER - 1) / 2))" + echo "Captured BIG TCP GSO packets: $(((PACKETS_CLIENT - 1) / 2))" + [ "$PACKETS_SERVER" -gt "$(( PACKETS_THRESHOLD * 2 + 1))" ] || return 1 + [ "$PACKETS_CLIENT" -gt "$(( PACKETS_THRESHOLD * 2 + 1))" ] || return 1 +} + +if ! netperf -V &> /dev/null; then + echo "SKIP: Could not run test without netperf tool" + exit "$ksft_skip" +fi + +if ! tcpdump --version &> /dev/null; then + echo "SKIP: Could not run test without tcpdump tool" + exit "$ksft_skip" +fi + +if ! ip link help 2>&1 | grep gso_ipv4_max_size &> /dev/null; then + echo "SKIP: Could not run test without gso/gro_ipv4_max_size supported in ip-link" + exit "$ksft_skip" +fi + +trap cleanup EXIT +setup +for tunnel in vxlan geneve; do + for tun_family in 4 6; do + for traffic_family in 4 6; do + setup_tunnel "$tunnel" "$tun_family" || exit "$?" + do_test "$traffic_family" || exit "$?" + cleanup_tunnel + done + done +done -- 2.54.0