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Wed, 02 Sep 2026 05:51:48 -0700 (PDT) From: Minxi Hou To: netdev@vger.kernel.org Cc: aconole@redhat.com, davem@davemloft.net, dev@openvswitch.org, echaudro@redhat.com, edumazet@google.com, i.maximets@ovn.org, i.maximets@redhat.com, kuba@kernel.org, linux-kernel@vger.kernel.org, linux-kselftest@vger.kernel.org, pabeni@redhat.com, shuah@kernel.org, horms@kernel.org, Minxi Hou Subject: [PATCH net-next v2 1/2] selftests/net/openvswitch: add SCTP flow key test over IPv6 Date: Wed, 2 Sep 2026 08:51:32 -0400 Message-ID: <20260902125133.1828572-2-houminxi@gmail.com> X-Mailer: git-send-email 2.55.0 In-Reply-To: <20260902125133.1828572-1-houminxi@gmail.com> References: <20260902125133.1828572-1-houminxi@gmail.com> Precedence: bulk X-Mailing-List: linux-kselftest@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit The merged SCTP test covers only IPv4. The IPv6 extraction path (parse_ipv6hdr walking extension headers, then the proto=132 branch in key_extract) and the v6 side of the SCTP netlink validation have no selftest coverage at all, so a regression there would ship silently. Add test_sctp_connect_v6 mirroring the v4 test: NS/NA forwarding flows stand in for ARP, and ipv6(proto=132),sctp(dst=4443)/sctp(src=4443) flows gate the association in the same three phases (flows installed, flows removed, flows reinstalled). After the association succeeds the test also pushes a known payload across and verifies the listener received it, so a flow-key bug that matches handshake packets but breaks DATA chunks is caught too. Skips when the sctp module is missing, socat lacks SCTP support, or IPv6 is unavailable; an association or DATA failure with the flows installed fails the test. Signed-off-by: Minxi Hou --- v2: rebased onto current net-next, no code changes .../selftests/net/openvswitch/openvswitch.sh | 97 ++++++++++++++++++- 1 file changed, 96 insertions(+), 1 deletion(-) diff --git a/tools/testing/selftests/net/openvswitch/openvswitch.sh b/tools/testing/selftests/net/openvswitch/openvswitch.sh index a31f7fb6882dc..06bd98d80a084 100755 --- a/tools/testing/selftests/net/openvswitch/openvswitch.sh +++ b/tools/testing/selftests/net/openvswitch/openvswitch.sh @@ -33,7 +33,8 @@ tests=" action_set set: SET action rewrites fields trunc trunc: output truncation icmpv6 icmpv6: ICMPv6 echo type match - sctp_connect_v4 sctp: SCTP flow key matching + sctp_connect_v4 sctp: SCTP flow key matching + sctp_connect_v6 sctp6: SCTP flow key matching over IPv6 psample psample: Sampling packets with psample" info() { @@ -700,6 +701,100 @@ test_sctp_connect_v4() { return 0 } +# sctp_connect_v6 test +# - sctp(dst=4443) matches client-to-server INIT +# - sctp(src=4443) matches server-to-client INIT-ACK +# - icmpv6 NS/NA flows forward neighbour discovery +# - remove flows and verify connection fails, reinstall and recover +test_sctp_connect_v6() { + local t="test_sctp_connect_v6" + local v6="eth_type(0x86dd),ipv6(proto=132)" + local payload="SCTP6_DATA_OK" + local rxfile="${ovs_base}/${t}/sctp-rx.txt" + + modprobe -q sctp 2>/dev/null || return "$ksft_skip" + socat -V 2>&1 | grep -q "define WITH_SCTP" || return "$ksft_skip" + [ -e /proc/sys/net/ipv6 ] || return "$ksft_skip" + + sbx_add "$t" || return $? + ovs_add_dp "$t" sctp6 || return 1 + + info "create namespaces" + for ns in client server; do + ovs_add_netns_and_veths "$t" "sctp6" "$ns" \ + "${ns:0:1}0" "${ns:0:1}1" || return 1 + done + + ip netns exec client ip addr add fd00::1/64 dev c1 nodad + ip netns exec client ip link set c1 up + ip netns exec server ip addr add fd00::2/64 dev s1 nodad + ip netns exec server ip link set s1 up + + # NS/NA forwarding + ovs_add_flow "$t" sctp6 \ + 'in_port(1),eth(),eth_type(0x86dd),ipv6(proto=58),icmpv6()' \ + '2' || return 1 + ovs_add_flow "$t" sctp6 \ + 'in_port(2),eth(),eth_type(0x86dd),ipv6(proto=58),icmpv6()' \ + '1' || return 1 + + # SCTP port matching: dst for request, src for reply + ovs_add_flow "$t" sctp6 \ + "in_port(1),eth(),$v6,sctp(dst=4443)" \ + '2' || return 1 + ovs_add_flow "$t" sctp6 \ + "in_port(2),eth(),$v6,sctp(src=4443)" \ + '1' || return 1 + + ovs_netns_spawn_daemon "$t" "server" \ + socat -u -t 1 SCTP6-LISTEN:4443,fork \ + OPEN:"$rxfile",creat,append + ovs_wait sctp_eps_has server 4443 || return 1 + + info "verify SCTP association with port-keyed flows" + ovs_sbx "$t" ip netns exec client \ + timeout 3 socat -u STDIN "SCTP6-CONNECT:[fd00::2]:4443" /dev/null \ + || { info "server did not receive SCTP DATA payload" + return 1; } + + ovs_del_flows "$t" sctp6 + + info "verify connection fails without flows" + ovs_add_flow "$t" sctp6 \ + 'in_port(1),eth(),eth_type(0x86dd),ipv6(proto=58),icmpv6()' \ + '2' || return 1 + ovs_add_flow "$t" sctp6 \ + 'in_port(2),eth(),eth_type(0x86dd),ipv6(proto=58),icmpv6()' \ + '1' || return 1 + + ovs_sbx "$t" ip netns exec client \ + timeout 3 socat -u STDIN "SCTP6-CONNECT:[fd00::2]:4443" /dev/null 2>&1 \ + && { info "connection should fail without flows" + return 1; } + + info "reinstall flows and verify recovery" + ovs_add_flow "$t" sctp6 \ + "in_port(1),eth(),$v6,sctp(dst=4443)" \ + '2' || return 1 + ovs_add_flow "$t" sctp6 \ + "in_port(2),eth(),$v6,sctp(src=4443)" \ + '1' || return 1 + + ovs_sbx "$t" ip netns exec client \ + timeout 3 socat -u STDIN "SCTP6-CONNECT:[fd00::2]:4443"