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selftests/bpf: bpf tunnel test. 

The patch migrates the original tests at samples/bpf/tcbpf2_kern.c
and samples/bpf/test_tunnel_bpf.sh to selftests.  There are a couple
changes from the original:
    1) add ipv6 vxlan, ipv6 geneve, ipv6 ipip tests
    2) simplify the original ipip tests (remove iperf tests)
    3) improve documentation
    4) use bpf_ntoh* and bpf_hton* api

In summary, 'test_tunnel_kern.o' contains the following bpf program:
  GRE: gre_set_tunnel, gre_get_tunnel
  IP6GRE: ip6gretap_set_tunnel, ip6gretap_get_tunnel
  ERSPAN: erspan_set_tunnel, erspan_get_tunnel
  IP6ERSPAN: ip4ip6erspan_set_tunnel, ip4ip6erspan_get_tunnel
  VXLAN: vxlan_set_tunnel, vxlan_get_tunnel
  IP6VXLAN: ip6vxlan_set_tunnel, ip6vxlan_get_tunnel
  GENEVE: geneve_set_tunnel, geneve_get_tunnel
  IP6GENEVE: ip6geneve_set_tunnel, ip6geneve_get_tunnel
  IPIP: ipip_set_tunnel, ipip_get_tunnel
  IP6IP: ipip6_set_tunnel, ipip6_get_tunnel,
         ip6ip6_set_tunnel, ip6ip6_get_tunnel
  XFRM: xfrm_get_state

Signed-off-by: William Tu <u9012063@gmail.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
This commit is contained in:
William Tu 2018-04-26 14:01:39 -07:00 коммит произвёл Daniel Borkmann
Родитель f761312023
Коммит 933a741e3b
3 изменённых файлов: 1445 добавлений и 2 удалений
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5
tools/testing/selftests/bpf/Makefile
Просмотреть файл

@ -32,7 +32,7 @@ TEST_GEN_FILES = test_pkt_access.o test_xdp.o test_l4lb.o test_tcp_estats.o test
test_l4lb_noinline.o test_xdp_noinline.o test_stacktrace_map.o \
sample_map_ret0.o test_tcpbpf_kern.o test_stacktrace_build_id.o \
sockmap_tcp_msg_prog.o connect4_prog.o connect6_prog.o test_adjust_tail.o \
test_btf_haskv.o test_btf_nokv.o test_sockmap_kern.o
test_btf_haskv.o test_btf_nokv.o test_sockmap_kern.o test_tunnel_kern.o
# Order correspond to 'make run_tests' order
TEST_PROGS := test_kmod.sh \
@ -40,7 +40,8 @@ TEST_PROGS := test_kmod.sh \
test_xdp_redirect.sh \
test_xdp_meta.sh \
test_offload.py \
test_sock_addr.sh
test_sock_addr.sh \
test_tunnel.sh
# Compile but not part of 'make run_tests'
TEST_GEN_PROGS_EXTENDED = test_libbpf_open test_sock_addr

729
tools/testing/selftests/bpf/test_tunnel.sh Executable file
Просмотреть файл

@ -0,0 +1,729 @@
#!/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 (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 (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_ipip6tnl_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 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
}
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_ipip6tnl_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}
}
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)' $enc
ip xfrm policy add src 10.1.1.200/32 dst 10.1.1.100/32 dir out \
tmpl src 172.16.1.200 dst 172.16.1.100 proto esp reqid 2 \
mode tunnel
# address & route
ip addr add dev veth1 10.1.1.200/32
ip route add 10.1.1.100 dev veth1 via 172.16.1.100 src 10.1.1.200
}
test_xfrm_tunnel()
{
config_device
#tcpdump -nei veth1 ip &
output=$(mktemp)
cat /sys/kernel/debug/tracing/trace_pipe | tee $output &
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" $output
check_err $?
grep "spi 0x1" $output
check_err $?
grep "remote ip 0xac100164" $output
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 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
}
cleanup_exit()
{
echo "CATCH SIGKILL or SIGINT, cleanup and exit"
cleanup
exit 0
}
check()
{
ip link help $1 2>&1 | grep -q "^Usage:"
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()
{
echo "Testing GRE tunnel..."
test_gre
echo "Testing IP6GRE tunnel..."
test_ip6gre
echo "Testing IP6GRETAP tunnel..."
test_ip6gretap
echo "Testing ERSPAN tunnel..."
test_erspan v2
echo "Testing IP6ERSPAN tunnel..."
test_ip6erspan v2
echo "Testing VXLAN tunnel..."
test_vxlan
echo "Testing IP6VXLAN tunnel..."
test_ip6vxlan
echo "Testing GENEVE tunnel..."
test_geneve
echo "Testing IP6GENEVE tunnel..."
test_ip6geneve
echo "Testing IPIP tunnel..."
test_ipip
echo "Testing IPIP6 tunnel..."
test_ipip6
echo "Testing IPSec tunnel..."
test_xfrm_tunnel
}
trap cleanup 0 3 6
trap cleanup_exit 2 9
cleanup
bpf_tunnel_test
exit 0

713
tools/testing/selftests/bpf/test_tunnel_kern.c Normal file
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@ -0,0 +1,713 @@
// SPDX-License-Identifier: GPL-2.0
/* Copyright (c) 2016 VMware
* Copyright (c) 2016 Facebook
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of version 2 of the GNU General Public
* License as published by the Free Software Foundation.
*/
#include <stddef.h>
#include <string.h>
#include <arpa/inet.h>
#include <linux/bpf.h>
#include <linux/if_ether.h>
#include <linux/if_packet.h>
#include <linux/ip.h>
#include <linux/ipv6.h>
#include <linux/types.h>
#include <linux/tcp.h>
#include <linux/socket.h>
#include <linux/pkt_cls.h>
#include <linux/erspan.h>
#include "bpf_helpers.h"
#include "bpf_endian.h"
#define ERROR(ret) do {\
char fmt[] = "ERROR line:%d ret:%d\n";\
bpf_trace_printk(fmt, sizeof(fmt), __LINE__, ret); \
} while (0)
int _version SEC("version") = 1;
struct geneve_opt {
__be16 opt_class;
__u8 type;
__u8 length:5;
__u8 r3:1;
__u8 r2:1;
__u8 r1:1;
__u8 opt_data[8]; /* hard-coded to 8 byte */
};
struct vxlan_metadata {
__u32 gbp;
};
SEC("gre_set_tunnel")
int _gre_set_tunnel(struct __sk_buff *skb)
{
int ret;
struct bpf_tunnel_key key;
__builtin_memset(&key, 0x0, sizeof(key));
key.remote_ipv4 = 0xac100164; /* 172.16.1.100 */
key.tunnel_id = 2;
key.tunnel_tos = 0;
key.tunnel_ttl = 64;
ret = bpf_skb_set_tunnel_key(skb, &key, sizeof(key),
BPF_F_ZERO_CSUM_TX | BPF_F_SEQ_NUMBER);
if (ret < 0) {
ERROR(ret);
return TC_ACT_SHOT;
}
return TC_ACT_OK;
}
SEC("gre_get_tunnel")
int _gre_get_tunnel(struct __sk_buff *skb)
{
int ret;
struct bpf_tunnel_key key;
char fmt[] = "key %d remote ip 0x%x\n";
ret = bpf_skb_get_tunnel_key(skb, &key, sizeof(key), 0);
if (ret < 0) {
ERROR(ret);
return TC_ACT_SHOT;
}
bpf_trace_printk(fmt, sizeof(fmt), key.tunnel_id, key.remote_ipv4);
return TC_ACT_OK;
}
SEC("ip6gretap_set_tunnel")
int _ip6gretap_set_tunnel(struct __sk_buff *skb)
{
struct bpf_tunnel_key key;
int ret;
__builtin_memset(&key, 0x0, sizeof(key));
key.remote_ipv6[3] = bpf_htonl(0x11); /* ::11 */
key.tunnel_id = 2;
key.tunnel_tos = 0;
key.tunnel_ttl = 64;
key.tunnel_label = 0xabcde;
ret = bpf_skb_set_tunnel_key(skb, &key, sizeof(key),
BPF_F_TUNINFO_IPV6 | BPF_F_ZERO_CSUM_TX |
BPF_F_SEQ_NUMBER);
if (ret < 0) {
ERROR(ret);
return TC_ACT_SHOT;
}
return TC_ACT_OK;
}
SEC("ip6gretap_get_tunnel")
int _ip6gretap_get_tunnel(struct __sk_buff *skb)
{
char fmt[] = "key %d remote ip6 ::%x label %x\n";
struct bpf_tunnel_key key;
int ret;
ret = bpf_skb_get_tunnel_key(skb, &key, sizeof(key),
BPF_F_TUNINFO_IPV6);
if (ret < 0) {
ERROR(ret);
return TC_ACT_SHOT;
}
bpf_trace_printk(fmt, sizeof(fmt),
key.tunnel_id, key.remote_ipv6[3], key.tunnel_label);
return TC_ACT_OK;
}
SEC("erspan_set_tunnel")
int _erspan_set_tunnel(struct __sk_buff *skb)
{
struct bpf_tunnel_key key;
struct erspan_metadata md;
int ret;
__builtin_memset(&key, 0x0, sizeof(key));
key.remote_ipv4 = 0xac100164; /* 172.16.1.100 */
key.tunnel_id = 2;
key.tunnel_tos = 0;
key.tunnel_ttl = 64;
ret = bpf_skb_set_tunnel_key(skb, &key, sizeof(key),
BPF_F_ZERO_CSUM_TX);
if (ret < 0) {
ERROR(ret);
return TC_ACT_SHOT;
}
__builtin_memset(&md, 0, sizeof(md));
#ifdef ERSPAN_V1
md.version = 1;
md.u.index = bpf_htonl(123);
#else
__u8 direction = 1;
__u8 hwid = 7;
md.version = 2;
md.u.md2.dir = direction;
md.u.md2.hwid = hwid & 0xf;
md.u.md2.hwid_upper = (hwid >> 4) & 0x3;
#endif
ret = bpf_skb_set_tunnel_opt(skb, &md, sizeof(md));
if (ret < 0) {
ERROR(ret);
return TC_ACT_SHOT;
}
return TC_ACT_OK;
}
SEC("erspan_get_tunnel")
int _erspan_get_tunnel(struct __sk_buff *skb)
{
char fmt[] = "key %d remote ip 0x%x erspan version %d\n";
struct bpf_tunnel_key key;
struct erspan_metadata md;
__u32 index;
int ret;
ret = bpf_skb_get_tunnel_key(skb, &key, sizeof(key), 0);
if (ret < 0) {
ERROR(ret);
return TC_ACT_SHOT;
}
ret = bpf_skb_get_tunnel_opt(skb, &md, sizeof(md));
if (ret < 0) {
ERROR(ret);
return TC_ACT_SHOT;
}
bpf_trace_printk(fmt, sizeof(fmt),
key.tunnel_id, key.remote_ipv4, md.version);
#ifdef ERSPAN_V1
char fmt2[] = "\tindex %x\n";
index = bpf_ntohl(md.u.index);
bpf_trace_printk(fmt2, sizeof(fmt2), index);
#else
char fmt2[] = "\tdirection %d hwid %x timestamp %u\n";
bpf_trace_printk(fmt2, sizeof(fmt2),
md.u.md2.dir,
(md.u.md2.hwid_upper << 4) + md.u.md2.hwid,
bpf_ntohl(md.u.md2.timestamp));
#endif
return TC_ACT_OK;
}
SEC("ip4ip6erspan_set_tunnel")
int _ip4ip6erspan_set_tunnel(struct __sk_buff *skb)
{
struct bpf_tunnel_key key;
struct erspan_metadata md;
int ret;
__builtin_memset(&key, 0x0, sizeof(key));
key.remote_ipv6[3] = bpf_htonl(0x11);
key.tunnel_id = 2;
key.tunnel_tos = 0;
key.tunnel_ttl = 64;
ret = bpf_skb_set_tunnel_key(skb, &key, sizeof(key),
BPF_F_TUNINFO_IPV6);
if (ret < 0) {
ERROR(ret);
return TC_ACT_SHOT;
}
__builtin_memset(&md, 0, sizeof(md));
#ifdef ERSPAN_V1
md.u.index = bpf_htonl(123);
md.version = 1;
#else
__u8 direction = 0;
__u8 hwid = 17;
md.version = 2;
md.u.md2.dir = direction;
md.u.md2.hwid = hwid & 0xf;
md.u.md2.hwid_upper = (hwid >> 4) & 0x3;
#endif
ret = bpf_skb_set_tunnel_opt(skb, &md, sizeof(md));
if (ret < 0) {
ERROR(ret);
return TC_ACT_SHOT;
}
return TC_ACT_OK;
}
SEC("ip4ip6erspan_get_tunnel")
int _ip4ip6erspan_get_tunnel(struct __sk_buff *skb)
{
char fmt[] = "ip6erspan get key %d remote ip6 ::%x erspan version %d\n";
struct bpf_tunnel_key key;
struct erspan_metadata md;
__u32 index;
int ret;
ret = bpf_skb_get_tunnel_key(skb, &key, sizeof(key),
BPF_F_TUNINFO_IPV6);
if (ret < 0) {
ERROR(ret);
return TC_ACT_SHOT;
}
ret = bpf_skb_get_tunnel_opt(skb, &md, sizeof(md));
if (ret < 0) {
ERROR(ret);
return TC_ACT_SHOT;
}
bpf_trace_printk(fmt, sizeof(fmt),
key.tunnel_id, key.remote_ipv4, md.version);
#ifdef ERSPAN_V1
char fmt2[] = "\tindex %x\n";
index = bpf_ntohl(md.u.index);
bpf_trace_printk(fmt2, sizeof(fmt2), index);
#else
char fmt2[] = "\tdirection %d hwid %x timestamp %u\n";
bpf_trace_printk(fmt2, sizeof(fmt2),
md.u.md2.dir,
(md.u.md2.hwid_upper << 4) + md.u.md2.hwid,
bpf_ntohl(md.u.md2.timestamp));
#endif
return TC_ACT_OK;
}
SEC("vxlan_set_tunnel")
int _vxlan_set_tunnel(struct __sk_buff *skb)
{
int ret;
struct bpf_tunnel_key key;
struct vxlan_metadata md;
__builtin_memset(&key, 0x0, sizeof(key));
key.remote_ipv4 = 0xac100164; /* 172.16.1.100 */
key.tunnel_id = 2;
key.tunnel_tos = 0;
key.tunnel_ttl = 64;
ret = bpf_skb_set_tunnel_key(skb, &key, sizeof(key),
BPF_F_ZERO_CSUM_TX);
if (ret < 0) {
ERROR(ret);
return TC_ACT_SHOT;
}
md.gbp = 0x800FF; /* Set VXLAN Group Policy extension */
ret = bpf_skb_set_tunnel_opt(skb, &md, sizeof(md));
if (ret < 0) {
ERROR(ret);
return TC_ACT_SHOT;
}
return TC_ACT_OK;
}
SEC("vxlan_get_tunnel")
int _vxlan_get_tunnel(struct __sk_buff *skb)
{
int ret;
struct bpf_tunnel_key key;
struct vxlan_metadata md;
char fmt[] = "key %d remote ip 0x%x vxlan gbp 0x%x\n";
ret = bpf_skb_get_tunnel_key(skb, &key, sizeof(key), 0);
if (ret < 0) {
ERROR(ret);
return TC_ACT_SHOT;
}
ret = bpf_skb_get_tunnel_opt(skb, &md, sizeof(md));
if (ret < 0) {
ERROR(ret);
return TC_ACT_SHOT;
}
bpf_trace_printk(fmt, sizeof(fmt),
key.tunnel_id, key.remote_ipv4, md.gbp);
return TC_ACT_OK;
}
SEC("ip6vxlan_set_tunnel")
int _ip6vxlan_set_tunnel(struct __sk_buff *skb)
{
struct bpf_tunnel_key key;
int ret;
__builtin_memset(&key, 0x0, sizeof(key));
key.remote_ipv6[3] = bpf_htonl(0x11); /* ::11 */
key.tunnel_id = 22;
key.tunnel_tos = 0;
key.tunnel_ttl = 64;
ret = bpf_skb_set_tunnel_key(skb, &key, sizeof(key),
BPF_F_TUNINFO_IPV6);
if (ret < 0) {
ERROR(ret);
return TC_ACT_SHOT;
}
return TC_ACT_OK;
}
SEC("ip6vxlan_get_tunnel")
int _ip6vxlan_get_tunnel(struct __sk_buff *skb)
{
char fmt[] = "key %d remote ip6 ::%x label %x\n";
struct bpf_tunnel_key key;
int ret;
ret = bpf_skb_get_tunnel_key(skb, &key, sizeof(key),
BPF_F_TUNINFO_IPV6);
if (ret < 0) {
ERROR(ret);
return TC_ACT_SHOT;
}
bpf_trace_printk(fmt, sizeof(fmt),
key.tunnel_id, key.remote_ipv6[3], key.tunnel_label);
return TC_ACT_OK;
}
SEC("geneve_set_tunnel")
int _geneve_set_tunnel(struct __sk_buff *skb)
{
int ret, ret2;
struct bpf_tunnel_key key;
struct geneve_opt gopt;
__builtin_memset(&key, 0x0, sizeof(key));
key.remote_ipv4 = 0xac100164; /* 172.16.1.100 */
key.tunnel_id = 2;
key.tunnel_tos = 0;
key.tunnel_ttl = 64;
__builtin_memset(&gopt, 0x0, sizeof(gopt));
gopt.opt_class = bpf_htons(0x102); /* Open Virtual Networking (OVN) */
gopt.type = 0x08;
gopt.r1 = 0;
gopt.r2 = 0;
gopt.r3 = 0;
gopt.length = 2; /* 4-byte multiple */
*(int *) &gopt.opt_data = bpf_htonl(0xdeadbeef);
ret = bpf_skb_set_tunnel_key(skb, &key, sizeof(key),
BPF_F_ZERO_CSUM_TX);
if (ret < 0) {
ERROR(ret);
return TC_ACT_SHOT;
}
ret = bpf_skb_set_tunnel_opt(skb, &gopt, sizeof(gopt));
if (ret < 0) {
ERROR(ret);
return TC_ACT_SHOT;
}
return TC_ACT_OK;
}
SEC("geneve_get_tunnel")
int _geneve_get_tunnel(struct __sk_buff *skb)
{
int ret;
struct bpf_tunnel_key key;
struct geneve_opt gopt;
char fmt[] = "key %d remote ip 0x%x geneve class 0x%x\n";
ret = bpf_skb_get_tunnel_key(skb, &key, sizeof(key), 0);
if (ret < 0) {
ERROR(ret);
return TC_ACT_SHOT;
}
ret = bpf_skb_get_tunnel_opt(skb, &gopt, sizeof(gopt));
if (ret < 0) {
ERROR(ret);
return TC_ACT_SHOT;
}
bpf_trace_printk(fmt, sizeof(fmt),
key.tunnel_id, key.remote_ipv4, gopt.opt_class);
return TC_ACT_OK;
}
SEC("ip6geneve_set_tunnel")
int _ip6geneve_set_tunnel(struct __sk_buff *skb)
{
struct bpf_tunnel_key key;
struct geneve_opt gopt;
int ret;
__builtin_memset(&key, 0x0, sizeof(key));
key.remote_ipv6[3] = bpf_htonl(0x11); /* ::11 */
key.tunnel_id = 22;
key.tunnel_tos = 0;
key.tunnel_ttl = 64;
ret = bpf_skb_set_tunnel_key(skb, &key, sizeof(key),
BPF_F_TUNINFO_IPV6);
if (ret < 0) {
ERROR(ret);
return TC_ACT_SHOT;
}
__builtin_memset(&gopt, 0x0, sizeof(gopt));
gopt.opt_class = bpf_htons(0x102); /* Open Virtual Networking (OVN) */
gopt.type = 0x08;
gopt.r1 = 0;
gopt.r2 = 0;
gopt.r3 = 0;
gopt.length = 2; /* 4-byte multiple */
*(int *) &gopt.opt_data = bpf_htonl(0xfeedbeef);
ret = bpf_skb_set_tunnel_opt(skb, &gopt, sizeof(gopt));
if (ret < 0) {
ERROR(ret);
return TC_ACT_SHOT;
}
return TC_ACT_OK;
}
SEC("ip6geneve_get_tunnel")
int _ip6geneve_get_tunnel(struct __sk_buff *skb)
{
char fmt[] = "key %d remote ip 0x%x geneve class 0x%x\n";
struct bpf_tunnel_key key;
struct geneve_opt gopt;
int ret;
ret = bpf_skb_get_tunnel_key(skb, &key, sizeof(key),
BPF_F_TUNINFO_IPV6);
if (ret < 0) {
ERROR(ret);
return TC_ACT_SHOT;
}
ret = bpf_skb_get_tunnel_opt(skb, &gopt, sizeof(gopt));
if (ret < 0) {
ERROR(ret);
return TC_ACT_SHOT;
}
bpf_trace_printk(fmt, sizeof(fmt),
key.tunnel_id, key.remote_ipv4, gopt.opt_class);
return TC_ACT_OK;
}
SEC("ipip_set_tunnel")
int _ipip_set_tunnel(struct __sk_buff *skb)
{
struct bpf_tunnel_key key = {};
void *data = (void *)(long)skb->data;
struct iphdr *iph = data;
struct tcphdr *tcp = data + sizeof(*iph);
void *data_end = (void *)(long)skb->data_end;
int ret;
/* single length check */
if (data + sizeof(*iph) + sizeof(*tcp) > data_end) {
ERROR(1);
return TC_ACT_SHOT;
}
key.tunnel_ttl = 64;
if (iph->protocol == IPPROTO_ICMP) {
key.remote_ipv4 = 0xac100164; /* 172.16.1.100 */
} else {
if (iph->protocol != IPPROTO_TCP || iph->ihl != 5)
return TC_ACT_SHOT;
if (tcp->dest == bpf_htons(5200))
key.remote_ipv4 = 0xac100164; /* 172.16.1.100 */
else if (tcp->dest == bpf_htons(5201))
key.remote_ipv4 = 0xac100165; /* 172.16.1.101 */
else
return TC_ACT_SHOT;
}
ret = bpf_skb_set_tunnel_key(skb, &key, sizeof(key), 0);
if (ret < 0) {
ERROR(ret);
return TC_ACT_SHOT;
}
return TC_ACT_OK;
}
SEC("ipip_get_tunnel")
int _ipip_get_tunnel(struct __sk_buff *skb)
{
int ret;
struct bpf_tunnel_key key;
char fmt[] = "remote ip 0x%x\n";
ret = bpf_skb_get_tunnel_key(skb, &key, sizeof(key), 0);
if (ret < 0) {
ERROR(ret);
return TC_ACT_SHOT;
}
bpf_trace_printk(fmt, sizeof(fmt), key.remote_ipv4);
return TC_ACT_OK;
}
SEC("ipip6_set_tunnel")
int _ipip6_set_tunnel(struct __sk_buff *skb)
{
struct bpf_tunnel_key key = {};
void *data = (void *)(long)skb->data;
struct iphdr *iph = data;
struct tcphdr *tcp = data + sizeof(*iph);
void *data_end = (void *)(long)skb->data_end;
int ret;
/* single length check */
if (data + sizeof(*iph) + sizeof(*tcp) > data_end) {
ERROR(1);
return TC_ACT_SHOT;
}
__builtin_memset(&key, 0x0, sizeof(key));
key.remote_ipv6[3] = bpf_htonl(0x11); /* ::11 */
key.tunnel_ttl = 64;
ret = bpf_skb_set_tunnel_key(skb, &key, sizeof(key),
BPF_F_TUNINFO_IPV6);
if (ret < 0) {
ERROR(ret);
return TC_ACT_SHOT;
}
return TC_ACT_OK;
}
SEC("ipip6_get_tunnel")
int _ipip6_get_tunnel(struct __sk_buff *skb)
{
int ret;
struct bpf_tunnel_key key;
char fmt[] = "remote ip6 %x::%x\n";
ret = bpf_skb_get_tunnel_key(skb, &key, sizeof(key),
BPF_F_TUNINFO_IPV6);
if (ret < 0) {
ERROR(ret);
return TC_ACT_SHOT;
}
bpf_trace_printk(fmt, sizeof(fmt), bpf_htonl(key.remote_ipv6[0]),
bpf_htonl(key.remote_ipv6[3]));
return TC_ACT_OK;
}
SEC("ip6ip6_set_tunnel")
int _ip6ip6_set_tunnel(struct __sk_buff *skb)
{
struct bpf_tunnel_key key = {};
void *data = (void *)(long)skb->data;
struct ipv6hdr *iph = data;
struct tcphdr *tcp = data + sizeof(*iph);
void *data_end = (void *)(long)skb->data_end;
int ret;
/* single length check */
if (data + sizeof(*iph) + sizeof(*tcp) > data_end) {
ERROR(1);
return TC_ACT_SHOT;
}
key.remote_ipv6[0] = bpf_htonl(0x2401db00);
key.tunnel_ttl = 64;
if (iph->nexthdr == 58 /* NEXTHDR_ICMP */) {
key.remote_ipv6[3] = bpf_htonl(1);
} else {
if (iph->nexthdr != 6 /* NEXTHDR_TCP */) {
ERROR(iph->nexthdr);
return TC_ACT_SHOT;
}
if (tcp->dest == bpf_htons(5200)) {
key.remote_ipv6[3] = bpf_htonl(1);
} else if (tcp->dest == bpf_htons(5201)) {
key.remote_ipv6[3] = bpf_htonl(2);
} else {
ERROR(tcp->dest);
return TC_ACT_SHOT;
}
}
ret = bpf_skb_set_tunnel_key(skb, &key, sizeof(key),
BPF_F_TUNINFO_IPV6);
if (ret < 0) {
ERROR(ret);
return TC_ACT_SHOT;
}
return TC_ACT_OK;
}
SEC("ip6ip6_get_tunnel")
int _ip6ip6_get_tunnel(struct __sk_buff *skb)
{
int ret;
struct bpf_tunnel_key key;
char fmt[] = "remote ip6 %x::%x\n";
ret = bpf_skb_get_tunnel_key(skb, &key, sizeof(key),
BPF_F_TUNINFO_IPV6);
if (ret < 0) {
ERROR(ret);
return TC_ACT_SHOT;
}
bpf_trace_printk(fmt, sizeof(fmt), bpf_htonl(key.remote_ipv6[0]),
bpf_htonl(key.remote_ipv6[3]));
return TC_ACT_OK;
}
SEC("xfrm_get_state")
int _xfrm_get_state(struct __sk_buff *skb)
{
struct bpf_xfrm_state x;
char fmt[] = "reqid %d spi 0x%x remote ip 0x%x\n";
int ret;
ret = bpf_skb_get_xfrm_state(skb, 0, &x, sizeof(x), 0);
if (ret < 0)
return TC_ACT_OK;
bpf_trace_printk(fmt, sizeof(fmt), x.reqid, bpf_ntohl(x.spi),
bpf_ntohl(x.remote_ipv4));
return TC_ACT_OK;
}
char _license[] SEC("license") = "GPL";