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linux-headers-6.8.0-83
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testing
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bpf
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test_tunnel.sh
#!/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=172.16.1.100 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 BPF_FILE="test_tunnel_kern.bpf.o" BPF_PIN_TUNNEL_DIR="/sys/fs/bpf/tc/tunnel" 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() { tun_key= if [ -n "$1" ]; then tun_key="key $1" fi # at_ns0 namespace ip netns exec at_ns0 \ ip link add dev $DEV_NS type $TYPE seq $tun_key \ 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 $tun_key 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_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 2 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_gre_no_tunnel_key() { TYPE=gre DEV_NS=gre00 DEV=gre11 ret=0 check $TYPE config_device add_gre_tunnel attach_bpf $DEV gre_set_tunnel_no_key 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_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} } attach_bpf() { DEV=$1 SET=$2 GET=$3 mkdir -p ${BPF_PIN_TUNNEL_DIR} bpftool prog loadall ${BPF_FILE} ${BPF_PIN_TUNNEL_DIR}/ tc qdisc add dev $DEV clsact tc filter add dev $DEV egress bpf da object-pinned ${BPF_PIN_TUNNEL_DIR}/$SET tc filter add dev $DEV ingress bpf da object-pinned ${BPF_PIN_TUNNEL_DIR}/$GET } cleanup() { rm -rf ${BPF_PIN_TUNNEL_DIR} 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 gre11 2> /dev/null ip link del ip6gre11 2> /dev/null ip link del ip6gretap11 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 } 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 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 + $? )) echo "Testing GRE tunnel (without tunnel keys)..." test_gre_no_tunnel_key errors=$(( $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 + $? )) echo "Testing GENEVE tunnel..." test_geneve errors=$(( $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 + $? )) 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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