selftests net: add UDP GRO fraglist + bpf self-tests

When NET_F_F_GRO_FRAGLIST is enabled and bpf_skb_change_proto is used,
check if udp packets and tcp packets are successfully delivered to user
space. If wrong udp packets are delivered, udpgso_bench_rx will exit
with "Initial byte out of range"
Signed-off-by: Maciej enczykowski <maze@google.com>
Signed-off-by: Lina Wang <lina.wang@mediatek.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

tools/testing/selftests/net/Makefile

@@ -25,6 +25,7 @@ TEST_PROGS += bareudp.sh
 TEST_PROGS += amt.sh
 TEST_PROGS += unicast_extensions.sh
 TEST_PROGS += udpgro_fwd.sh
+TEST_PROGS += udpgro_frglist.sh
 TEST_PROGS += veth.sh
 TEST_PROGS += ioam6.sh
 TEST_PROGS += gro.sh
@@ -61,6 +62,8 @@ TEST_FILES := settings
 KSFT_KHDR_INSTALL := 1
 include ../lib.mk
 
+include bpf/Makefile
+
 $(OUTPUT)/reuseport_bpf_numa: LDLIBS += -lnuma
 $(OUTPUT)/tcp_mmap: LDLIBS += -lpthread
 $(OUTPUT)/tcp_inq: LDLIBS += -lpthread

tools/testing/selftests/net/bpf/Makefile

+# SPDX-License-Identifier: GPL-2.0
+
+CLANG ?= clang
+CCINCLUDE += -I../../bpf
+CCINCLUDE += -I../../../../../usr/include/
+
+TEST_CUSTOM_PROGS = $(OUTPUT)/bpf/nat6to4.o
+all: $(TEST_CUSTOM_PROGS)
+
+$(OUTPUT)/%.o: %.c
+	$(CLANG) -O2 -target bpf -c $< $(CCINCLUDE) -o $@
+
+clean:
+	rm -f $(TEST_CUSTOM_PROGS)

tools/testing/selftests/net/udpgro_frglist.sh

+#!/bin/bash
+# SPDX-License-Identifier: GPL-2.0
+#
+# Run a series of udpgro benchmarks
+
+readonly PEER_NS="ns-peer-$(mktemp -u XXXXXX)"
+
+cleanup() {
+	local -r jobs="$(jobs -p)"
+	local -r ns="$(ip netns list|grep $PEER_NS)"
+
+	[ -n "${jobs}" ] && kill -INT ${jobs} 2>/dev/null
+	[ -n "$ns" ] && ip netns del $ns 2>/dev/null
+}
+trap cleanup EXIT
+
+run_one() {
+	# use 'rx' as separator between sender args and receiver args
+	local -r all="$@"
+	local -r tx_args=${all%rx*}
+	local rx_args=${all#*rx}
+
+
+
+	ip netns add "${PEER_NS}"
+	ip -netns "${PEER_NS}" link set lo up
+	ip link add type veth
+	ip link set dev veth0 up
+	ip addr add dev veth0 192.168.1.2/24
+	ip addr add dev veth0 2001:db8::2/64 nodad
+
+	ip link set dev veth1 netns "${PEER_NS}"
+	ip -netns "${PEER_NS}" addr add dev veth1 192.168.1.1/24
+	ip -netns "${PEER_NS}" addr add dev veth1 2001:db8::1/64 nodad
+	ip -netns "${PEER_NS}" link set dev veth1 up
+	ip netns exec "${PEER_NS}" ethtool -K veth1 rx-gro-list on
+
+
+	ip -n "${PEER_NS}" link set veth1 xdp object ../bpf/xdp_dummy.o section xdp_dummy
+	tc -n "${PEER_NS}" qdisc add dev veth1 clsact
+	tc -n "${PEER_NS}" filter add dev veth1 ingress prio 4 protocol ipv6 bpf object-file ../bpf/nat6to4.o section schedcls/ingress6/nat_6  direct-action
+	tc -n "${PEER_NS}" filter add dev veth1 egress prio 4 protocol ip bpf object-file ../bpf/nat6to4.o section schedcls/egress4/snat4 direct-action
+        echo ${rx_args}
+	ip netns exec "${PEER_NS}" ./udpgso_bench_rx ${rx_args} -r &
+
+	# Hack: let bg programs complete the startup
+	sleep 0.1
+	./udpgso_bench_tx ${tx_args}
+}
+
+run_in_netns() {
+	local -r args=$@
+  echo ${args}
+	./in_netns.sh $0 __subprocess ${args}
+}
+
+run_udp() {
+	local -r args=$@
+
+	echo "udp gso - over veth touching data"
+	run_in_netns ${args} -u -S 0 rx -4 -v
+
+	echo "udp gso and gro - over veth touching data"
+	run_in_netns ${args} -S 0 rx -4 -G
+}
+
+run_tcp() {
+	local -r args=$@
+
+	echo "tcp - over veth touching data"
+	run_in_netns ${args} -t rx -4 -t
+}
+
+run_all() {
+	local -r core_args="-l 4"
+	local -r ipv4_args="${core_args} -4  -D 192.168.1.1"
+	local -r ipv6_args="${core_args} -6  -D 2001:db8::1"
+
+	echo "ipv6"
+	run_tcp "${ipv6_args}"
+	run_udp "${ipv6_args}"
+}
+
+if [ ! -f ../bpf/xdp_dummy.o ]; then
+	echo "Missing xdp_dummy helper. Build bpf selftest first"
+	exit -1
+fi
+
+if [ ! -f bpf/nat6to4.o ]; then
+	echo "Missing nat6to4 helper. Build bpfnat6to4.o selftest first"
+	exit -1
+fi
+
+if [[ $# -eq 0 ]]; then
+	run_all
+elif [[ $1 == "__subprocess" ]]; then
+	shift
+	run_one $@
+else
+	run_in_netns $@
+fi