selftests: net: test vxlan pmtu exceptions with tcp

[platform/kernel/linux-rpi.git] / tools / testing / selftests / net / pmtu.sh

diff --git a/tools/testing/selftests/net/pmtu.sh b/tools/testing/selftests/net/pmtu.sh
index dfe3d28..f838dd3 100755 (executable)
--- a/tools/testing/selftests/net/pmtu.sh
+++ b/tools/testing/selftests/net/pmtu.sh
@@ -361,6 +361,7 @@ err_buf=
 tcpdump_pids=
 nettest_pids=
 socat_pids=
+tmpoutfile=
 
 err() {
        err_buf="${err_buf}${1}
@@ -951,6 +952,7 @@ cleanup() {
        ip link del veth_A-R1                   2>/dev/null
        ovs-vsctl --if-exists del-port vxlan_a  2>/dev/null
        ovs-vsctl --if-exists del-br ovs_br0    2>/dev/null
+       rm -f "$tmpoutfile"
 }
 
 mtu() {
@@ -1328,6 +1330,39 @@ test_pmtu_ipvX_over_bridged_vxlanY_or_geneveY_exception() {
        check_pmtu_value ${exp_mtu} "${pmtu}" "exceeding link layer MTU on bridged ${type} interface"
        pmtu="$(route_get_dst_pmtu_from_exception "${ns_a}" ${dst})"
        check_pmtu_value ${exp_mtu} "${pmtu}" "exceeding link layer MTU on locally bridged ${type} interface"
+
+       tmpoutfile=$(mktemp)
+
+       # Flush Exceptions, retry with TCP
+       run_cmd ${ns_a} ip route flush cached ${dst}
+       run_cmd ${ns_b} ip route flush cached ${dst}
+       run_cmd ${ns_c} ip route flush cached ${dst}
+
+       for target in "${ns_a}" "${ns_c}" ; do
+               if [ ${family} -eq 4 ]; then
+                       TCPDST=TCP:${dst}:50000
+               else
+                       TCPDST="TCP:[${dst}]:50000"
+               fi
+               ${ns_b} socat -T 3 -u -6 TCP-LISTEN:50000 STDOUT > $tmpoutfile &
+
+               sleep 1
+
+               dd if=/dev/zero of=/dev/stdout status=none bs=1M count=1 | ${target} socat -T 3 -u STDIN $TCPDST,connect-timeout=3
+
+               size=$(du -sb $tmpoutfile)
+               size=${size%%/tmp/*}
+
+               [ $size -ne 1048576 ] && err "File size $size mismatches exepcted value in locally bridged vxlan test" && return 1
+       done
+
+       rm -f "$tmpoutfile"
+
+       # Check that exceptions were created
+       pmtu="$(route_get_dst_pmtu_from_exception "${ns_c}" ${dst})"
+       check_pmtu_value ${exp_mtu} "${pmtu}" "tcp: exceeding link layer MTU on bridged ${type} interface"
+       pmtu="$(route_get_dst_pmtu_from_exception "${ns_a}" ${dst})"
+       check_pmtu_value ${exp_mtu} "${pmtu}" "tcp exceeding link layer MTU on locally bridged ${type} interface"
 }
 
 test_pmtu_ipv4_br_vxlan4_exception() {