From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from fhigh-b1-smtp.messagingengine.com (fhigh-b1-smtp.messagingengine.com [202.12.124.152]) (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 1114D3D331D for ; Tue, 2 Jun 2026 09:41:17 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=202.12.124.152 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1780393279; cv=none; b=ewqeir3UagyJ4BqvzwZM/oMvfjoKcY/X/zYVsSRozTXEQ0kzzVWkAIi81ItDIvWKootMgXAA9JHe4Dfcbxz0PExf5QgfbtguJ9r6Afp8PgIfWvZeA5WceqVLWa6jx50kkS6h8RlrjZfsKGtXcbAK7O4IjCnVIq6Et1ji7889r8k= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1780393279; c=relaxed/simple; bh=IcTa34JM6Ln8abElOh1Nk0yxzd+N8+BO21gYVKPFo3M=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=AOxAug+beXeELHc9VId5etK09xfTw4PHsDGG2i3V3xvNRDVK/6k4GeiQ5lRfiwxtJyNiYpCVTth00EX3JJZuuyuoDMvIlVwkrPlTrMh8TWtEUf8mT1VFE4Eisns4CvFifFSJL83Dd3FVk40rgEBMM19oUrlRXfRBmnDowC28uWI= 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=Gh7owAnJ; dkim=pass (2048-bit key) header.d=messagingengine.com header.i=@messagingengine.com header.b=K7qvfQmN; arc=none smtp.client-ip=202.12.124.152 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="Gh7owAnJ"; dkim=pass (2048-bit key) header.d=messagingengine.com header.i=@messagingengine.com header.b="K7qvfQmN" Received: from phl-compute-01.internal (phl-compute-01.internal [10.202.2.41]) by mailfhigh.stl.internal (Postfix) with ESMTP id EF8BD7A013A; Tue, 2 Jun 2026 05:41:16 -0400 (EDT) Received: from phl-frontend-03 ([10.202.2.162]) by phl-compute-01.internal (MEProxy); Tue, 02 Jun 2026 05:41:17 -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=1780393276; x= 1780479676; bh=YPOlzuigh2xsIb6ykABbPx55nx/illDTqrlxylgdzrc=; b=G h7owAnJ6i/LoGAC4ZyGZFtmqYN00x0RzitbMzvzUlEZOCDEikHy4rQpHl+ZPWRtU NTJXgeRzTenD8SnesTAyfC4L0F3nV9gNEsjIKQXitkmiGSIIl+mKoQzdzO3vzLvq bM85czB73KZ+mi6n6Q0WdHkob4Xoe8BVHJfU9FgzM7zoMz5fmbGJA1L5Hp3jvafo 94rJb8pXlXhfhmnZUYdF6jugNC5z2KKFCw+QhRYVUUQOa2DmQQzi6mp2KemZ5Q4x gj3Of2H31anPmTPoNoAxIl24bP2FVpJqITCxSAyrhmy1ZWbfI0bGXN5+XkfiKCDI 6LLNIxN8Smq94KIYC9iqA== 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=1780393276; x=1780479676; bh=Y POlzuigh2xsIb6ykABbPx55nx/illDTqrlxylgdzrc=; b=K7qvfQmNCsHyUUlkP Vp1YQlf2N+THfozqCM5JzcVJp1EVYksv+zBvpXKDohyum9ztBWL6wqkpcPQclddi R32PDGE1DOWP35Tl5SifuvzuxYPXWnjldSPvxz60iSMXSTbL+MT8y99/Mm44FEzP 1IDoCITKLzD7d16WzHcJBeA9WEfuL93IpZXLYnyEr4EnlFrnhfwFc/G5Lu8kFNbd JRW4E+d+oYvU2hA+IGKoYKPaHVD1WYLn8zOoKjKsfpJ/JLUhWg7Vsf/camEvt1ck +j3YRGVkzlIAalOiUICBzUQqtcdGqLSLWDEOPrm+nROjr6amfAu1LhUlK9LQRx5h tLizA== X-ME-Sender: X-ME-Received: X-ME-Proxy-Cause: dmFkZTF9LO8Fhxl0/MdIK8BUY2JQgdWC+kkwHzGCIWrHCsyDgpRCDULHq0hEGzyXg7aDpH g3idQFp6N72tYF5QG6bTYSL3eQwKt+GpNR9rRcOTWJ9aKqTbORCHN5RI0R3wf58tsokbGN 73Oy3xbuLKf0ntd6qSFQ28IzEhKMpOn7OfJQEFkKh1lsoSzS++LYbp+YX7Ns1szQyPSQjh hCAd3cOuhsD0YiKkxrqbt+hTWsi0LuT8Uc8YC8KjARG9EUDuMmJngbTSfecH7xW9NWHZBH WXsEdIAJ98cxIFXJncDak9wr72KOFdCkyGNyS03qdQ0B7zZZ2h0tltUFvmvWxjCoYF/QNR FGZYzZx4HsYbvTqpvP8rtPsTBGTcUMxKCC6x30uUjbDeO5X7ORZOegwx57d+LQ2A8VsWwB NhFe3ygZLRGk62fk6GwQfdycN3JfV4y+nAy3dBHwyCocG4fAN5QP1eEbgewCsVSdq4e38E AGOIdzEKpUUoP6rtqfTYx5AZ++359TDpJmzZU9MVuwr3rkdgm79x92SyCFIYwWMiJcCxIj n4dNmV+uLO+76T4GZZfzNibASUwTYvrpx6qC+AQ7gqZoBv44M7mEMGQEEUFlAFXYKWMfD5 Os67/Vjg/r3AagsnB+DhpOP0DfIs4d7UIXmyl3kpkkitBV76NJojS4NlUvmw X-ME-Proxy: Feedback-ID: i559e4809:Fastmail Received: by mail.messagingengine.com (Postfix) with ESMTPA; Tue, 2 Jun 2026 05:41:16 -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 v6 11/11] selftests: net: Add a test for BIG TCP in UDP tunnels Date: Tue, 2 Jun 2026 11:39:31 +0200 Message-ID: <20260602093931.516281-12-alice.kernel@fastmail.im> X-Mailer: git-send-email 2.54.0 In-Reply-To: <20260602093931.516281-1-alice.kernel@fastmail.im> References: <20260602093931.516281-1-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 5ca6c557fc3f..f32aa5495751 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