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selftests: net: bareudp: Add stream tests with software GSO
The bareudp tests only send pings, which are not GSO packets, so the
segmentation path of bareudp is not covered.
Copy a file over TCP from NS0 to NS3 with socat after the IPv4 and IPv6
ping tests, with UDP tunnel segmentation offload disabled on the
underlay veths, so that the GSO packets encapsulated by bareudp are
segmented in software. Raise the MTU of the underlay veths, so that full
sized packets fit with the encapsulation, as there is no path MTU
discovery through bareudp.
The MPLS overlay gets no stream test: bareudp does not set
mpls_features, so MPLS GSO packets are segmented by mpls_gso before
they reach bareudp, and are dropped if mpls_gso is not available.
The ping and stream tests share the result reporting, so move it into
report_result(). Without socat or ethtool, the stream tests are skipped.
Without commit c57b2e60d4 ("bareudp: set the inner protocol to the
protocol of the packet"), the IPv4 and IPv6 streams over UDPv6, and the
IPv6 stream over UDPv4 in multiproto mode, time out.
Suggested-by: Willem de Bruijn <willemb@google.com>
Signed-off-by: Haishuang Yan <yanhaishuang@cmss.chinamobile.com>
Reviewed-by: Simon Horman <horms@kernel.org>
Link: https://patch.msgid.link/20261011104300.1606351-1-yanhaishuang@cmss.chinamobile.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
This commit is contained in:
Haishuang Yan
Jakub Kicinski
parent
befe96ed37
commit
f42d67a504
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@ -105,16 +105,27 @@
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# | (encapsulated with MPLS label 200) |
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# | |
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# +-----------------------------------------------------------------------+
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#
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# Besides the ping tests, a file is copied over TCP from NS0 to NS3 with
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# socat for the IPv4 and IPv6 overlays. UDP tunnel segmentation offload is
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# disabled on veth12 and veth21, so that the GSO packets encapsulated by
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# bareudp are segmented in software. These two veths get a larger MTU to fit
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# the encapsulation.
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. ./lib.sh
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ERR=4 # Return 4 by default, which is the SKIP code for kselftest
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PING6="ping"
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PAUSE_ON_FAIL="no"
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STREAM="yes"
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STREAM_PORT=5000
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STREAM_TIMEOUT=10
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TMPFILE=""
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# Exit the script after having removed the network namespaces it created
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exit_cleanup()
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{
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[ -n "${TMPFILE}" ] && rm -f "${TMPFILE}"
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cleanup_all_ns
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if [ "${ERR}" -eq 4 ]; then
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@ -180,6 +191,29 @@ setup_underlay()
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tc -netns "${NS1}" qdisc add dev veth10 ingress
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tc -netns "${NS2}" qdisc add dev veth23 ingress
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if [ "${STREAM}" = "yes" ]; then
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# Leave room for the encapsulation on the underlay, so that full
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# sized packets from NS0 can be tunnelled without fragmentation
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ip -netns "${NS1}" link set dev veth12 mtu 1600
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ip -netns "${NS2}" link set dev veth21 mtu 1600
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# Segment the encapsulated GSO packets in software
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ip netns exec "${NS1}" ethtool -K veth12 \
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tx-udp_tnl-segmentation off \
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tx-udp_tnl-csum-segmentation off
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ip netns exec "${NS2}" ethtool -K veth21 \
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tx-udp_tnl-segmentation off \
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tx-udp_tnl-csum-segmentation off
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TMPFILE=$(mktemp)
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dd if=/dev/urandom of="${TMPFILE}" bs=1M count=16 status=none
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ip netns exec "${NS3}" socat -u \
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TCP6-LISTEN:"${STREAM_PORT}",ipv6only=0,reuseaddr,fork \
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OPEN:/dev/null &
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wait_local_port_listen "${NS3}" "${STREAM_PORT}" tcp
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fi
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}
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# Set up the IPv4, IPv6 and MPLS overlays.
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@ -252,9 +286,6 @@ setup_overlay_mpls()
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# * $2: the IP address to ping,
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# * $3: a human readable description of the purpose of the test.
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#
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# If the test fails and PAUSE_ON_FAIL is active, the user is given the
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# possibility to continue with the next test or to quit immediately.
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#
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ping_test_one()
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{
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local PING="$1"; readonly PING
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@ -269,7 +300,50 @@ ping_test_one()
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RET=$?
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set -e
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if [ "${RET}" -eq 0 ]; then
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report_result "${RET}"
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}
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# Copy a file over TCP from NS0 to NS3 and print the result
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#
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# Parameters:
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#
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# * $1: the socat address of the receiver,
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# * $2: a human readable description of the purpose of the test.
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#
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stream_test_one()
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{
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local ADDR="$1"; readonly ADDR
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local MSG="$2"; readonly MSG
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local RET
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printf "TEST: %-60s " "${MSG}"
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if [ "${STREAM}" != "yes" ]; then
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printf "[SKIP]\n"
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return
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fi
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set +e
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ip netns exec "${NS0}" timeout "${STREAM_TIMEOUT}" \
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socat -u OPEN:"${TMPFILE}" "${ADDR}" > /dev/null 2>&1
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RET=$?
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set -e
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report_result "${RET}"
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}
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# Print the result of a test
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#
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# Parameters:
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#
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# * $1: the exit code of the test.
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#
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# If the test fails and PAUSE_ON_FAIL is active, the user is given the
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# possibility to continue with the next test or to quit immediately.
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#
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report_result()
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{
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if [ "$1" -eq 0 ]; then
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printf "[ OK ]\n"
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else
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ERR=1
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@ -307,9 +381,13 @@ ping_test()
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if [ $IPV4 ]; then
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ping_test_one "ping" "192.0.2.103" "IPv4 packets over ${UNDERLAY}${MODE}"
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stream_test_one "TCP4:192.0.2.103:${STREAM_PORT}" \
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"IPv4 stream over ${UNDERLAY}${MODE}"
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fi
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if [ $IPV6 ]; then
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ping_test_one "${PING6}" "2001:db8::103" "IPv6 packets over ${UNDERLAY}${MODE}"
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stream_test_one "TCP6:[2001:db8::103]:${STREAM_PORT}" \
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"IPv6 stream over ${UNDERLAY}${MODE}"
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fi
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if [ $MPLS_UC ]; then
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ping_test_one "${PING6}" "2001:db8::203" "Unicast MPLS packets over ${UNDERLAY}${MODE}"
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@ -471,6 +549,12 @@ check_features()
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# Use ping6 on systems where ping doesn't handle IPv6
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ping -w 1 -c 1 ::1 > /dev/null 2>&1 || PING6="ping6"
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if [ ! -x "$(command -v socat)" ] ||
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[ ! -x "$(command -v ethtool)" ]; then
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echo "socat or ethtool not found, skipping the stream tests" >&2
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STREAM="no"
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fi
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}
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usage()
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