diff options
author | Christian Ehrig <cehrig@cloudflare.com> | 2023-04-07 16:38:55 +0300 |
---|---|---|
committer | Alexei Starovoitov <ast@kernel.org> | 2023-04-13 02:40:39 +0300 |
commit | d9688f898c08c8f96fb0e7879262877ffd319bfd (patch) | |
tree | 970e66422694ac762f552c367514bc1ea3fc94fd /tools/testing/selftests/bpf/progs/test_tunnel_kern.c | |
parent | c50e96099edb134bf107fafc02715fbc4aa2277f (diff) | |
download | linux-d9688f898c08c8f96fb0e7879262877ffd319bfd.tar.xz |
selftests/bpf: Test FOU kfuncs for externally controlled ipip devices
Add tests for FOU and GUE encapsulation via the bpf_skb_{set,get}_fou_encap
kfuncs, using ipip devices in collect-metadata mode.
These tests make sure that we can successfully set and obtain FOU and GUE
encap parameters using ingress / egress BPF tc-hooks.
Signed-off-by: Christian Ehrig <cehrig@cloudflare.com>
Link: https://lore.kernel.org/r/040193566ddbdb0b53eb359f7ac7bbd316f338b5.1680874078.git.cehrig@cloudflare.com
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Diffstat (limited to 'tools/testing/selftests/bpf/progs/test_tunnel_kern.c')
-rw-r--r-- | tools/testing/selftests/bpf/progs/test_tunnel_kern.c | 117 |
1 files changed, 117 insertions, 0 deletions
diff --git a/tools/testing/selftests/bpf/progs/test_tunnel_kern.c b/tools/testing/selftests/bpf/progs/test_tunnel_kern.c index 9ab2d55ab7c0..f66af753bbbb 100644 --- a/tools/testing/selftests/bpf/progs/test_tunnel_kern.c +++ b/tools/testing/selftests/bpf/progs/test_tunnel_kern.c @@ -52,6 +52,21 @@ struct vxlan_metadata { __u32 gbp; }; +struct bpf_fou_encap { + __be16 sport; + __be16 dport; +}; + +enum bpf_fou_encap_type { + FOU_BPF_ENCAP_FOU, + FOU_BPF_ENCAP_GUE, +}; + +int bpf_skb_set_fou_encap(struct __sk_buff *skb_ctx, + struct bpf_fou_encap *encap, int type) __ksym; +int bpf_skb_get_fou_encap(struct __sk_buff *skb_ctx, + struct bpf_fou_encap *encap) __ksym; + struct { __uint(type, BPF_MAP_TYPE_ARRAY); __uint(max_entries, 1); @@ -750,6 +765,108 @@ int ipip_get_tunnel(struct __sk_buff *skb) } SEC("tc") +int ipip_gue_set_tunnel(struct __sk_buff *skb) +{ + struct bpf_tunnel_key key = {}; + struct bpf_fou_encap encap = {}; + void *data = (void *)(long)skb->data; + struct iphdr *iph = data; + void *data_end = (void *)(long)skb->data_end; + int ret; + + if (data + sizeof(*iph) > data_end) { + log_err(1); + return TC_ACT_SHOT; + } + + key.tunnel_ttl = 64; + if (iph->protocol == IPPROTO_ICMP) + key.remote_ipv4 = 0xac100164; /* 172.16.1.100 */ + + ret = bpf_skb_set_tunnel_key(skb, &key, sizeof(key), 0); + if (ret < 0) { + log_err(ret); + return TC_ACT_SHOT; + } + + encap.sport = 0; + encap.dport = bpf_htons(5555); + + ret = bpf_skb_set_fou_encap(skb, &encap, FOU_BPF_ENCAP_GUE); + if (ret < 0) { + log_err(ret); + return TC_ACT_SHOT; + } + + return TC_ACT_OK; +} + +SEC("tc") +int ipip_fou_set_tunnel(struct __sk_buff *skb) +{ + struct bpf_tunnel_key key = {}; + struct bpf_fou_encap encap = {}; + void *data = (void *)(long)skb->data; + struct iphdr *iph = data; + void *data_end = (void *)(long)skb->data_end; + int ret; + + if (data + sizeof(*iph) > data_end) { + log_err(1); + return TC_ACT_SHOT; + } + + key.tunnel_ttl = 64; + if (iph->protocol == IPPROTO_ICMP) + key.remote_ipv4 = 0xac100164; /* 172.16.1.100 */ + + ret = bpf_skb_set_tunnel_key(skb, &key, sizeof(key), 0); + if (ret < 0) { + log_err(ret); + return TC_ACT_SHOT; + } + + encap.sport = 0; + encap.dport = bpf_htons(5555); + + ret = bpf_skb_set_fou_encap(skb, &encap, FOU_BPF_ENCAP_FOU); + if (ret < 0) { + log_err(ret); + return TC_ACT_SHOT; + } + + return TC_ACT_OK; +} + +SEC("tc") +int ipip_encap_get_tunnel(struct __sk_buff *skb) +{ + int ret; + struct bpf_tunnel_key key = {}; + struct bpf_fou_encap encap = {}; + + ret = bpf_skb_get_tunnel_key(skb, &key, sizeof(key), 0); + if (ret < 0) { + log_err(ret); + return TC_ACT_SHOT; + } + + ret = bpf_skb_get_fou_encap(skb, &encap); + if (ret < 0) { + log_err(ret); + return TC_ACT_SHOT; + } + + if (bpf_ntohs(encap.dport) != 5555) + return TC_ACT_SHOT; + + bpf_printk("%d remote ip 0x%x, sport %d, dport %d\n", ret, + key.remote_ipv4, bpf_ntohs(encap.sport), + bpf_ntohs(encap.dport)); + return TC_ACT_OK; +} + +SEC("tc") int ipip6_set_tunnel(struct __sk_buff *skb) { struct bpf_tunnel_key key = {}; |