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#!/bin/bash # SPDX-License-Identifier: GPL-2.0 # End-to-end eBPF tunnel test suite # The script tests BPF network tunnel implementation. # # Topology: # --------- # root namespace \| at_ns0 namespace # \| # ----------- \| ----------- # \| tnl dev \| \| \| tnl dev \| (overlay network) # ----------- \| ----------- # metadata-mode \| native-mode # with bpf \| # \| # ---------- \| ---------- # \| veth1 \| --------- \| veth0 \| (underlay network) # ---------- peer ---------- # # # Device Configuration # -------------------- # Root namespace with metadata-mode tunnel + BPF # Device names and addresses: # veth1 IP: 172.16.1.200, IPv6: 00::22 (underlay) # tunnel dev <type>11, ex: gre11, IPv4: 10.1.1.200, IPv6: 1::22 (overlay) # # Namespace at_ns0 with native tunnel # Device names and addresses: # veth0 IPv4: 172.16.1.100, IPv6: 00::11 (underlay) # tunnel dev <type>00, ex: gre00, IPv4: 10.1.1.100, IPv6: 1::11 (overlay) # # # End-to-end ping packet flow # --------------------------- # Most of the tests start by namespace creation, device configuration, # then ping the underlay and overlay network. When doing 'ping 10.1.1.100' # from root namespace, the following operations happen: # 1) Route lookup shows 10.1.1.100/24 belongs to tnl dev, fwd to tnl dev. # 2) Tnl device's egress BPF program is triggered and set the tunnel metadata, # with remote_ip=172.16.1.200 and others. # 3) Outer tunnel header is prepended and route the packet to veth1's egress # 4) veth0's ingress queue receive the tunneled packet at namespace at_ns0 # 5) Tunnel protocol handler, ex: vxlan_rcv, decap the packet # 6) Forward the packet to the overlay tnl dev PING_ARG="-c 3 -w 10 -q" ret=0 GREEN='\033[0;92m' RED='\033[0;31m' NC='\033[0m' # No Color config_device() { ip netns add at_ns0 ip link add veth0 type veth peer name veth1 ip link set veth0 netns at_ns0 ip netns exec at_ns0 ip addr add 172.16.1.100/24 dev veth0 ip netns exec at_ns0 ip link set dev veth0 up ip link set dev veth1 up mtu 1500 ip addr add dev veth1 172.16.1.200/24 } add_gre_tunnel() { # at_ns0 namespace ip netns exec at_ns0 \ ip link add dev $DEV_NS type $TYPE seq key 2 \ local 172.16.1.100 remote 172.16.1.200 ip netns exec at_ns0 ip link set dev $DEV_NS up ip netns exec at_ns0 ip addr add dev $DEV_NS 10.1.1.100/24 # root namespace ip link add dev $DEV type $TYPE key 2 external ip link set dev $DEV up ip addr add dev $DEV 10.1.1.200/24 } add_ip6gretap_tunnel() { # assign ipv6 address ip netns exec at_ns0 ip addr add ::11/96 dev veth0 ip netns exec at_ns0 ip link set dev veth0 up ip addr add dev veth1 ::22/96 ip link set dev veth1 up # at_ns0 namespace ip netns exec at_ns0 \ ip link add dev $DEV_NS type $TYPE seq flowlabel 0xbcdef key 2 \ local ::11 remote ::22 ip netns exec at_ns0 ip addr add dev $DEV_NS 10.1.1.100/24 ip netns exec at_ns0 ip addr add dev $DEV_NS fc80::100/96 ip netns exec at_ns0 ip link set dev $DEV_NS up # root namespace ip link add dev $DEV type $TYPE external ip addr add dev $DEV 10.1.1.200/24 ip addr add dev $DEV fc80::200/24 ip link set dev $DEV up } add_erspan_tunnel() { # at_ns0 namespace if [ "$1" == "v1" ]; then ip netns exec at_ns0 \ ip link add dev $DEV_NS type $TYPE seq key 2 \ local 172.16.1.100 remote 172.16.1.200 \ erspan_ver 1 erspan 123 else ip netns exec at_ns0 \ ip link add dev $DEV_NS type $TYPE seq key 2 \ local 172.16.1.100 remote 172.16.1.200 \ erspan_ver 2 erspan_dir egress erspan_hwid 3 fi ip netns exec at_ns0 ip link set dev $DEV_NS up ip netns exec at_ns0 ip addr add dev $DEV_NS 10.1.1.100/24 # root namespace ip link add dev $DEV type $TYPE external ip link set dev $DEV up ip addr add dev $DEV 10.1.1.200/24 } add_ip6erspan_tunnel() { # assign ipv6 address ip netns exec at_ns0 ip addr add ::11/96 dev veth0 ip netns exec at_ns0 ip link set dev veth0 up ip addr add dev veth1 ::22/96 ip link set dev veth1 up # at_ns0 namespace if [ "$1" == "v1" ]; then ip netns exec at_ns0 \ ip link add dev $DEV_NS type $TYPE seq key 2 \ local ::11 remote ::22 \ erspan_ver 1 erspan 123 else ip netns exec at_ns0 \ ip link add dev $DEV_NS type $TYPE seq key 2 \ local ::11 remote ::22 \ erspan_ver 2 erspan_dir egress erspan_hwid 7 fi ip netns exec at_ns0 ip addr add dev $DEV_NS 10.1.1.100/24 ip netns exec at_ns0 ip link set dev $DEV_NS up # root namespace ip link add dev $DEV type $TYPE external ip addr add dev $DEV 10.1.1.200/24 ip link set dev $DEV up } add_vxlan_tunnel() { # Set static ARP entry here because iptables set-mark works # on L3 packet, as a result not applying to ARP packets, # causing errors at get_tunnel_{key/opt}. # at_ns0 namespace ip netns exec at_ns0 \ ip link add dev $DEV_NS type $TYPE \ id 2 dstport 4789 gbp remote 172.16.1.200 ip netns exec at_ns0 \ ip link set dev $DEV_NS address 52:54:00:d9:01:00 up ip netns exec at_ns0 ip addr add dev $DEV_NS 10.1.1.100/24 ip netns exec at_ns0 arp -s 10.1.1.200 52:54:00:d9:02:00 ip netns exec at_ns0 iptables -A OUTPUT -j MARK --set-mark 0x800FF # root namespace ip link add dev $DEV type $TYPE external gbp dstport 4789 ip link set dev $DEV address 52:54:00:d9:02:00 up ip addr add dev $DEV 10.1.1.200/24 arp -s 10.1.1.100 52:54:00:d9:01:00 } add_ip6vxlan_tunnel() { #ip netns exec at_ns0 ip -4 addr del 172.16.1.100 dev veth0 ip netns exec at_ns0 ip -6 addr add ::11/96 dev veth0 ip netns exec at_ns0 ip link set dev veth0 up #ip -4 addr del 172.16.1.200 dev veth1 ip -6 addr add dev veth1 ::22/96 ip link set dev veth1 up # at_ns0 namespace ip netns exec at_ns0 \ ip link add dev $DEV_NS type $TYPE id 22 dstport 4789 \ local ::11 remote ::22 ip netns exec at_ns0 ip addr add dev $DEV_NS 10.1.1.100/24 ip netns exec at_ns0 ip link set dev $DEV_NS up # root namespace ip link add dev $DEV type $TYPE external dstport 4789 ip addr add dev $DEV 10.1.1.200/24 ip link set dev $DEV up } add_geneve_tunnel() { # at_ns0 namespace ip netns exec at_ns0 \ ip link add dev $DEV_NS type $TYPE \ id 2 dstport 6081 remote 172.16.1.200 ip netns exec at_ns0 ip link set dev $DEV_NS up ip netns exec at_ns0 ip addr add dev $DEV_NS 10.1.1.100/24 # root namespace ip link add dev $DEV type $TYPE dstport 6081 external ip link set dev $DEV up ip addr add dev $DEV 10.1.1.200/24 } add_ip6geneve_tunnel() { ip netns exec at_ns0 ip addr add ::11/96 dev veth0 ip netns exec at_ns0 ip link set dev veth0 up ip addr add dev veth1 ::22/96 ip link set dev veth1 up # at_ns0 namespace ip netns exec at_ns0 \ ip link add dev $DEV_NS type $TYPE id 22 \ remote ::22 # geneve has no local option ip netns exec at_ns0 ip addr add dev $DEV_NS 10.1.1.100/24 ip netns exec at_ns0 ip link set dev $DEV_NS up # root namespace ip link add dev $DEV type $TYPE external ip addr add dev $DEV 10.1.1.200/24 ip link set dev $DEV up } add_ipip_tunnel() { # at_ns0 namespace ip netns exec at_ns0 \ ip link add dev $DEV_NS type $TYPE \ local 172.16.1.100 remote 172.16.1.200 ip netns exec at_ns0 ip link set dev $DEV_NS up ip netns exec at_ns0 ip addr add dev $DEV_NS 10.1.1.100/24 # root namespace ip link add dev $DEV type $TYPE external ip link set dev $DEV up ip addr add dev $DEV 10.1.1.200/24 } add_ip6tnl_tunnel() { ip netns exec at_ns0 ip addr add ::11/96 dev veth0 ip netns exec at_ns0 ip link set dev veth0 up ip addr add dev veth1 ::22/96 ip link set dev veth1 up # at_ns0 namespace ip netns exec at_ns0 \ ip link add dev $DEV_NS type $TYPE \ local ::11 remote ::22 ip netns exec at_ns0 ip addr add dev $DEV_NS 10.1.1.100/24 ip netns exec at_ns0 ip addr add dev $DEV_NS 1::11/96 ip netns exec at_ns0 ip link set dev $DEV_NS up # root namespace ip link add dev $DEV type $TYPE external ip addr add dev $DEV 10.1.1.200/24 ip addr add dev $DEV 1::22/96 ip link set dev $DEV up } test_gre() { TYPE=gretap DEV_NS=gretap00 DEV=gretap11 ret=0 check $TYPE config_device add_gre_tunnel attach_bpf $DEV gre_set_tunnel gre_get_tunnel ping $PING_ARG 10.1.1.100 check_err $? ip netns exec at_ns0 ping $PING_ARG 10.1.1.200 check_err $? cleanup if [ $ret -ne 0 ]; then echo -e ${RED}"FAIL: $TYPE"${NC} return 1 fi echo -e ${GREEN}"PASS: $TYPE"${NC} } test_ip6gre() { TYPE=ip6gre DEV_NS=ip6gre00 DEV=ip6gre11 ret=0 check $TYPE config_device # reuse the ip6gretap function add_ip6gretap_tunnel attach_bpf $DEV ip6gretap_set_tunnel ip6gretap_get_tunnel # underlay ping6 $PING_ARG ::11 # overlay: ipv4 over ipv6 ip netns exec at_ns0 ping $PING_ARG 10.1.1.200 ping $PING_ARG 10.1.1.100 check_err $? # overlay: ipv6 over ipv6 ip netns exec at_ns0 ping6 $PING_ARG fc80::200 check_err $? cleanup if [ $ret -ne 0 ]; then echo -e ${RED}"FAIL: $TYPE"${NC} return 1 fi echo -e ${GREEN}"PASS: $TYPE"${NC} } test_ip6gretap() { TYPE=ip6gretap DEV_NS=ip6gretap00 DEV=ip6gretap11 ret=0 check $TYPE config_device add_ip6gretap_tunnel attach_bpf $DEV ip6gretap_set_tunnel ip6gretap_get_tunnel # underlay ping6 $PING_ARG ::11 # overlay: ipv4 over ipv6 ip netns exec at_ns0 ping $PING_ARG 10.1.1.200 ping $PING_ARG 10.1.1.100 check_err $? # overlay: ipv6 over ipv6 ip netns exec at_ns0 ping6 $PING_ARG fc80::200 check_err $? cleanup if [ $ret -ne 0 ]; then echo -e ${RED}"FAIL: $TYPE"${NC} return 1 fi echo -e ${GREEN}"PASS: $TYPE"${NC} } test_erspan() { TYPE=erspan DEV_NS=erspan00 DEV=erspan11 ret=0 check $TYPE config_device add_erspan_tunnel $1 attach_bpf $DEV erspan_set_tunnel erspan_get_tunnel ping $PING_ARG 10.1.1.100 check_err $? ip netns exec at_ns0 ping $PING_ARG 10.1.1.200 check_err $? cleanup if [ $ret -ne 0 ]; then echo -e ${RED}"FAIL: $TYPE"${NC} return 1 fi echo -e ${GREEN}"PASS: $TYPE"${NC} } test_ip6erspan() { TYPE=ip6erspan DEV_NS=ip6erspan00 DEV=ip6erspan11 ret=0 check $TYPE config_device add_ip6erspan_tunnel $1 attach_bpf $DEV ip4ip6erspan_set_tunnel ip4ip6erspan_get_tunnel ping6 $PING_ARG ::11 ip netns exec at_ns0 ping $PING_ARG 10.1.1.200 check_err $? cleanup if [ $ret -ne 0 ]; then echo -e ${RED}"FAIL: $TYPE"${NC} return 1 fi echo -e ${GREEN}"PASS: $TYPE"${NC} } test_vxlan() { TYPE=vxlan DEV_NS=vxlan00 DEV=vxlan11 ret=0 check $TYPE config_device add_vxlan_tunnel attach_bpf $DEV vxlan_set_tunnel vxlan_get_tunnel ping $PING_ARG 10.1.1.100 check_err $? ip netns exec at_ns0 ping $PING_ARG 10.1.1.200 check_err $? cleanup if [ $ret -ne 0 ]; then echo -e ${RED}"FAIL: $TYPE"${NC} return 1 fi echo -e ${GREEN}"PASS: $TYPE"${NC} } test_ip6vxlan() { TYPE=vxlan DEV_NS=ip6vxlan00 DEV=ip6vxlan11 ret=0 check $TYPE config_device add_ip6vxlan_tunnel ip link set dev veth1 mtu 1500 attach_bpf $DEV ip6vxlan_set_tunnel ip6vxlan_get_tunnel # underlay ping6 $PING_ARG ::11 # ip4 over ip6 ping $PING_ARG 10.1.1.100 check_err $? ip netns exec at_ns0 ping $PING_ARG 10.1.1.200 check_err $? cleanup if [ $ret -ne 0 ]; then echo -e ${RED}"FAIL: ip6$TYPE"${NC} return 1 fi echo -e ${GREEN}"PASS: ip6$TYPE"${NC} } test_geneve() { TYPE=geneve DEV_NS=geneve00 DEV=geneve11 ret=0 check $TYPE config_device add_geneve_tunnel attach_bpf $DEV geneve_set_tunnel geneve_get_tunnel ping $PING_ARG 10.1.1.100 check_err $? ip netns exec at_ns0 ping $PING_ARG 10.1.1.200 check_err $? cleanup if [ $ret -ne 0 ]; then echo -e ${RED}"FAIL: $TYPE"${NC} return 1 fi echo -e ${GREEN}"PASS: $TYPE"${NC} } test_ip6geneve() { TYPE=geneve DEV_NS=ip6geneve00 DEV=ip6geneve11 ret=0 check $TYPE config_device add_ip6geneve_tunnel attach_bpf $DEV ip6geneve_set_tunnel ip6geneve_get_tunnel ping $PING_ARG 10.1.1.100 check_err $? ip netns exec at_ns0 ping $PING_ARG 10.1.1.200 check_err $? cleanup if [ $ret -ne 0 ]; then echo -e ${RED}"FAIL: ip6$TYPE"${NC} return 1 fi echo -e ${GREEN}"PASS: ip6$TYPE"${NC} } test_ipip() { TYPE=ipip DEV_NS=ipip00 DEV=ipip11 ret=0 check $TYPE config_device add_ipip_tunnel ip link set dev veth1 mtu 1500 attach_bpf $DEV ipip_set_tunnel ipip_get_tunnel ping $PING_ARG 10.1.1.100 check_err $? ip netns exec at_ns0 ping $PING_ARG 10.1.1.200 check_err $? cleanup if [ $ret -ne 0 ]; then echo -e ${RED}"FAIL: $TYPE"${NC} return 1 fi echo -e ${GREEN}"PASS: $TYPE"${NC} } test_ipip6() { TYPE=ip6tnl DEV_NS=ipip6tnl00 DEV=ipip6tnl11 ret=0 check $TYPE config_device add_ip6tnl_tunnel ip link set dev veth1 mtu 1500 attach_bpf $DEV ipip6_set_tunnel ipip6_get_tunnel # underlay ping6 $PING_ARG ::11 # ip4 over ip6 ping $PING_ARG 10.1.1.100 check_err $? ip netns exec at_ns0 ping $PING_ARG 10.1.1.200 check_err $? cleanup if [ $ret -ne 0 ]; then echo -e ${RED}"FAIL: $TYPE"${NC} return 1 fi echo -e ${GREEN}"PASS: $TYPE"${NC} } test_ip6ip6() { TYPE=ip6tnl DEV_NS=ip6ip6tnl00 DEV=ip6ip6tnl11 ret=0 check $TYPE config_device add_ip6tnl_tunnel ip link set dev veth1 mtu 1500 attach_bpf $DEV ip6ip6_set_tunnel ip6ip6_get_tunnel # underlay ping6 $PING_ARG ::11 # ip6 over ip6 ping6 $PING_ARG 1::11 check_err $? ip netns exec at_ns0 ping6 $PING_ARG 1::22 check_err $? cleanup if [ $ret -ne 0 ]; then echo -e ${RED}"FAIL: ip6$TYPE"${NC} return 1 fi echo -e ${GREEN}"PASS: ip6$TYPE"${NC} } setup_xfrm_tunnel() { auth=0x$(printf '1%.0s' {1..40}) enc=0x$(printf '2%.0s' {1..32}) spi_in_to_out=0x1 spi_out_to_in=0x2 # at_ns0 namespace # at_ns0 -> root ip netns exec at_ns0 \ ip xfrm state add src 172.16.1.100 dst 172.16.1.200 proto esp \ spi $spi_in_to_out reqid 1 mode tunnel \ auth-trunc 'hmac(sha1)' $auth 96 enc 'cbc(aes)' $enc ip netns exec at_ns0 \ ip xfrm policy add src 10.1.1.100/32 dst 10.1.1.200/32 dir out \ tmpl src 172.16.1.100 dst 172.16.1.200 proto esp reqid 1 \ mode tunnel # root -> at_ns0 ip netns exec at_ns0 \ ip xfrm state add src 172.16.1.200 dst 172.16.1.100 proto esp \ spi $spi_out_to_in reqid 2 mode tunnel \ auth-trunc 'hmac(sha1)' $auth 96 enc 'cbc(aes)' $enc ip netns exec at_ns0 \ ip xfrm policy add src 10.1.1.200/32 dst 10.1.1.100/32 dir in \ tmpl src 172.16.1.200 dst 172.16.1.100 proto esp reqid 2 \ mode tunnel # address & route ip netns exec at_ns0 \ ip addr add dev veth0 10.1.1.100/32 ip netns exec at_ns0 \ ip route add 10.1.1.200 dev veth0 via 172.16.1.200 \ src 10.1.1.100 # root namespace # at_ns0 -> root ip xfrm state add src 172.16.1.100 dst 172.16.1.200 proto esp \ spi $spi_in_to_out reqid 1 mode tunnel \ auth-trunc 'hmac(sha1)' $auth 96 enc 'cbc(aes)' $enc ip xfrm policy add src 10.1.1.100/32 dst 10.1.1.200/32 dir in \ tmpl src 172.16.1.100 dst 172.16.1.200 proto esp reqid 1 \ mode tunnel # root -> at_ns0 ip xfrm state add src 172.16.1.200 dst 172.16.1.100 proto esp \ spi $spi_out_to_in reqid 2 mode tunnel \ auth-trunc 'hmac(sha1)' $auth 96 enc 'cbc(aes)' $enc ip xfrm policy add src 10.1.1.200/32 dst 10.1.1.100/32 dir out \ tmpl src 172.16.1.200 dst 172.16.1.100 proto esp reqid 2 \ mode tunnel # address & route ip addr add dev veth1 10.1.1.200/32 ip route add 10.1.1.100 dev veth1 via 172.16.1.100 src 10.1.1.200 } test_xfrm_tunnel() { config_device > /sys/kernel/debug/tracing/trace setup_xfrm_tunnel tc qdisc add dev veth1 clsact tc filter add dev veth1 proto ip ingress bpf da obj test_tunnel_kern.o \ sec xfrm_get_state ip netns exec at_ns0 ping $PING_ARG 10.1.1.200 sleep 1 grep "reqid 1" /sys/kernel/debug/tracing/trace check_err $? grep "spi 0x1" /sys/kernel/debug/tracing/trace check_err $? grep "remote ip 0xac100164" /sys/kernel/debug/tracing/trace check_err $? cleanup if [ $ret -ne 0 ]; then echo -e ${RED}"FAIL: xfrm tunnel"${NC} return 1 fi echo -e ${GREEN}"PASS: xfrm tunnel"${NC} } attach_bpf() { DEV=$1 SET=$2 GET=$3 tc qdisc add dev $DEV clsact tc filter add dev $DEV egress bpf da obj test_tunnel_kern.o sec $SET tc filter add dev $DEV ingress bpf da obj test_tunnel_kern.o sec $GET } cleanup() { ip netns delete at_ns0 2> /dev/null ip link del veth1 2> /dev/null ip link del ipip11 2> /dev/null ip link del ipip6tnl11 2> /dev/null ip link del ip6ip6tnl11 2> /dev/null ip link del gretap11 2> /dev/null ip link del ip6gre11 2> /dev/null ip link del ip6gretap11 2> /dev/null ip link del vxlan11 2> /dev/null ip link del ip6vxlan11 2> /dev/null ip link del geneve11 2> /dev/null ip link del ip6geneve11 2> /dev/null ip link del erspan11 2> /dev/null ip link del ip6erspan11 2> /dev/null ip xfrm policy delete dir out src 10.1.1.200/32 dst 10.1.1.100/32 2> /dev/null ip xfrm policy delete dir in src 10.1.1.100/32 dst 10.1.1.200/32 2> /dev/null ip xfrm state delete src 172.16.1.100 dst 172.16.1.200 proto esp spi 0x1 2> /dev/null ip xfrm state delete src 172.16.1.200 dst 172.16.1.100 proto esp spi 0x2 2> /dev/null } cleanup_exit() { echo "CATCH SIGKILL or SIGINT, cleanup and exit" cleanup exit 0 } check() { ip link help 2>&1 \| grep -q "\s$1\s" if [ $? -ne 0 ];then echo "SKIP $1: iproute2 not support" cleanup return 1 fi } enable_debug() { echo 'file ip_gre.c +p' > /sys/kernel/debug/dynamic_debug/control echo 'file ip6_gre.c +p' > /sys/kernel/debug/dynamic_debug/control echo 'file vxlan.c +p' > /sys/kernel/debug/dynamic_debug/control echo 'file geneve.c +p' > /sys/kernel/debug/dynamic_debug/control echo 'file ipip.c +p' > /sys/kernel/debug/dynamic_debug/control } check_err() { if [ $ret -eq 0 ]; then ret=$1 fi } bpf_tunnel_test() { local errors=0 echo "Testing GRE tunnel..." test_gre errors=$(( $errors + $? )) echo "Testing IP6GRE tunnel..." test_ip6gre errors=$(( $errors + $? )) echo "Testing IP6GRETAP tunnel..." test_ip6gretap errors=$(( $errors + $? )) echo "Testing ERSPAN tunnel..." test_erspan v2 errors=$(( $errors + $? )) echo "Testing IP6ERSPAN tunnel..." test_ip6erspan v2 errors=$(( $errors + $? )) echo "Testing VXLAN tunnel..." test_vxlan errors=$(( $errors + $? )) echo "Testing IP6VXLAN tunnel..." test_ip6vxlan errors=$(( $errors + $? )) echo "Testing GENEVE tunnel..." test_geneve errors=$(( $errors + $? )) echo "Testing IP6GENEVE tunnel..." test_ip6geneve errors=$(( $errors + $? )) echo "Testing IPIP tunnel..." test_ipip errors=$(( $errors + $? )) echo "Testing IPIP6 tunnel..." test_ipip6 errors=$(( $errors + $? )) echo "Testing IP6IP6 tunnel..." test_ip6ip6 errors=$(( $errors + $? )) echo "Testing IPSec tunnel..." test_xfrm_tunnel errors=$(( $errors + $? )) return $errors } trap cleanup 0 3 6 trap cleanup_exit 2 9 cleanup bpf_tunnel_test if [ $? -ne 0 ]; then echo -e "$(basename $0): ${RED}FAIL${NC}" exit 1 fi echo -e "$(basename $0): ${GREEN}PASS${NC}" exit 0

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