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6afb1e28b8
The patch creates sample code exercising bpf_skb_{set,get}_tunnel_key,
and bpf_skb_{set,get}_tunnel_opt for GRE, VXLAN, and GENEVE. A native
tunnel device is created in a namespace to interact with a lwtunnel
device out of the namespace, with metadata enabled. The bpf_skb_set_*
program is attached to tc egress and bpf_skb_get_* is attached to egress
qdisc. A ping between two tunnels is used to verify correctness and
the result of bpf_skb_get_* printed by bpf_trace_printk.
Signed-off-by: William Tu <u9012063@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
128 lines
3.3 KiB
Bash
Executable File
128 lines
3.3 KiB
Bash
Executable File
#!/bin/bash
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# In Namespace 0 (at_ns0) using native tunnel
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# Overlay IP: 10.1.1.100
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# local 192.16.1.100 remote 192.16.1.200
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# veth0 IP: 172.16.1.100, tunnel dev <type>00
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# Out of Namespace using BPF set/get on lwtunnel
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# Overlay IP: 10.1.1.200
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# local 172.16.1.200 remote 172.16.1.100
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# veth1 IP: 172.16.1.200, tunnel dev <type>11
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set -e
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function config_device {
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ip netns add at_ns0
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ip link add veth0 type veth peer name veth1
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ip link set veth0 netns at_ns0
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ip netns exec at_ns0 ip addr add 172.16.1.100/24 dev veth0
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ip netns exec at_ns0 ip link set dev veth0 up
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ip link set dev veth1 up
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ip addr add dev veth1 172.16.1.200/24
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}
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function add_gre_tunnel {
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# in namespace
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ip netns exec at_ns0 \
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ip link add dev $DEV_NS type $TYPE key 2 local 172.16.1.100 remote 172.16.1.200
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ip netns exec at_ns0 ip link set dev $DEV_NS up
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ip netns exec at_ns0 ip addr add dev $DEV_NS 10.1.1.100/24
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# out of namespace
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ip link add dev $DEV type $TYPE key 2 external
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ip link set dev $DEV up
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ip addr add dev $DEV 10.1.1.200/24
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}
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function add_vxlan_tunnel {
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# Set static ARP entry here because iptables set-mark works
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# on L3 packet, as a result not applying to ARP packets,
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# causing errors at get_tunnel_{key/opt}.
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# in namespace
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ip netns exec at_ns0 \
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ip link add dev $DEV_NS type $TYPE id 2 dstport 4789 gbp remote 172.16.1.200
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ip netns exec at_ns0 ip link set dev $DEV_NS address 52:54:00:d9:01:00 up
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ip netns exec at_ns0 ip addr add dev $DEV_NS 10.1.1.100/24
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ip netns exec at_ns0 arp -s 10.1.1.200 52:54:00:d9:02:00
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ip netns exec at_ns0 iptables -A OUTPUT -j MARK --set-mark 0x800FF
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# out of namespace
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ip link add dev $DEV type $TYPE external gbp dstport 4789
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ip link set dev $DEV address 52:54:00:d9:02:00 up
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ip addr add dev $DEV 10.1.1.200/24
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arp -s 10.1.1.100 52:54:00:d9:01:00
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}
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function add_geneve_tunnel {
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# in namespace
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ip netns exec at_ns0 \
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ip link add dev $DEV_NS type $TYPE id 2 dstport 6081 remote 172.16.1.200
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ip netns exec at_ns0 ip link set dev $DEV_NS up
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ip netns exec at_ns0 ip addr add dev $DEV_NS 10.1.1.100/24
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# out of namespace
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ip link add dev $DEV type $TYPE dstport 6081 external
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ip link set dev $DEV up
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ip addr add dev $DEV 10.1.1.200/24
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}
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function attach_bpf {
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DEV=$1
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SET_TUNNEL=$2
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GET_TUNNEL=$3
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tc qdisc add dev $DEV clsact
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tc filter add dev $DEV egress bpf da obj tcbpf2_kern.o sec $SET_TUNNEL
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tc filter add dev $DEV ingress bpf da obj tcbpf2_kern.o sec $GET_TUNNEL
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}
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function test_gre {
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TYPE=gretap
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DEV_NS=gretap00
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DEV=gretap11
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config_device
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add_gre_tunnel
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attach_bpf $DEV gre_set_tunnel gre_get_tunnel
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ping -c 1 10.1.1.100
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ip netns exec at_ns0 ping -c 1 10.1.1.200
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}
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function test_vxlan {
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TYPE=vxlan
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DEV_NS=vxlan00
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DEV=vxlan11
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config_device
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add_vxlan_tunnel
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attach_bpf $DEV vxlan_set_tunnel vxlan_get_tunnel
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ping -c 1 10.1.1.100
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ip netns exec at_ns0 ping -c 1 10.1.1.200
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}
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function test_geneve {
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TYPE=geneve
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DEV_NS=geneve00
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DEV=geneve11
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config_device
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add_geneve_tunnel
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attach_bpf $DEV geneve_set_tunnel geneve_get_tunnel
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ping -c 1 10.1.1.100
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ip netns exec at_ns0 ping -c 1 10.1.1.200
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}
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function cleanup {
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ip netns delete at_ns0
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ip link del veth1
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ip link del $DEV
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}
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echo "Testing GRE tunnel..."
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test_gre
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cleanup
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echo "Testing VXLAN tunnel..."
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test_vxlan
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cleanup
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echo "Testing GENEVE tunnel..."
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test_geneve
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cleanup
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echo "Success"
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