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selftests/bpf: make flow dissector tests more extensible
Rewrite selftest to iterate over an array with input packet and expected flow_keys. This should make it easier to extend this test with additional cases without too much boilerplate. Signed-off-by: Stanislav Fomichev <sdf@google.com> Acked-by: Song Liu <songliubraving@fb.com> Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
This commit is contained in:
Stanislav Fomichev
Daniel Borkmann
parent
08de198c95
commit
a5cb33464e
1 changed files with 116 additions and 81 deletions
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@ -2,7 +2,7 @@
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#include <test_progs.h>
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#define CHECK_FLOW_KEYS(desc, got, expected) \
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CHECK(memcmp(&got, &expected, sizeof(got)) != 0, \
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CHECK_ATTR(memcmp(&got, &expected, sizeof(got)) != 0, \
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desc, \
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"nhoff=%u/%u " \
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"thoff=%u/%u " \
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@ -10,6 +10,7 @@
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"is_frag=%u/%u " \
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"is_first_frag=%u/%u " \
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"is_encap=%u/%u " \
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"ip_proto=0x%x/0x%x " \
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"n_proto=0x%x/0x%x " \
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"sport=%u/%u " \
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"dport=%u/%u\n", \
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@ -19,53 +20,32 @@
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got.is_frag, expected.is_frag, \
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got.is_first_frag, expected.is_first_frag, \
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got.is_encap, expected.is_encap, \
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got.ip_proto, expected.ip_proto, \
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got.n_proto, expected.n_proto, \
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got.sport, expected.sport, \
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got.dport, expected.dport)
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static struct bpf_flow_keys pkt_v4_flow_keys = {
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.nhoff = 0,
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.thoff = sizeof(struct iphdr),
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.addr_proto = ETH_P_IP,
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.ip_proto = IPPROTO_TCP,
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.n_proto = __bpf_constant_htons(ETH_P_IP),
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};
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struct ipv4_pkt {
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struct ethhdr eth;
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struct iphdr iph;
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struct tcphdr tcp;
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} __packed;
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static struct bpf_flow_keys pkt_v6_flow_keys = {
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.nhoff = 0,
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.thoff = sizeof(struct ipv6hdr),
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.addr_proto = ETH_P_IPV6,
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.ip_proto = IPPROTO_TCP,
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.n_proto = __bpf_constant_htons(ETH_P_IPV6),
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};
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#define VLAN_HLEN 4
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static struct {
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struct svlan_ipv4_pkt {
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struct ethhdr eth;
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__u16 vlan_tci;
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__u16 vlan_proto;
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struct iphdr iph;
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struct tcphdr tcp;
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} __packed pkt_vlan_v4 = {
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.eth.h_proto = __bpf_constant_htons(ETH_P_8021Q),
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.vlan_proto = __bpf_constant_htons(ETH_P_IP),
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.iph.ihl = 5,
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.iph.protocol = IPPROTO_TCP,
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.iph.tot_len = __bpf_constant_htons(MAGIC_BYTES),
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.tcp.urg_ptr = 123,
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.tcp.doff = 5,
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};
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} __packed;
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static struct bpf_flow_keys pkt_vlan_v4_flow_keys = {
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.nhoff = VLAN_HLEN,
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.thoff = VLAN_HLEN + sizeof(struct iphdr),
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.addr_proto = ETH_P_IP,
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.ip_proto = IPPROTO_TCP,
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.n_proto = __bpf_constant_htons(ETH_P_IP),
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};
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struct ipv6_pkt {
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struct ethhdr eth;
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struct ipv6hdr iph;
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struct tcphdr tcp;
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} __packed;
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static struct {
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struct dvlan_ipv6_pkt {
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struct ethhdr eth;
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__u16 vlan_tci;
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__u16 vlan_proto;
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@ -73,31 +53,97 @@ static struct {
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__u16 vlan_proto2;
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struct ipv6hdr iph;
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struct tcphdr tcp;
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} __packed pkt_vlan_v6 = {
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} __packed;
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struct test {
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const char *name;
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union {
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struct ipv4_pkt ipv4;
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struct svlan_ipv4_pkt svlan_ipv4;
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struct ipv6_pkt ipv6;
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struct dvlan_ipv6_pkt dvlan_ipv6;
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} pkt;
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struct bpf_flow_keys keys;
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};
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#define VLAN_HLEN 4
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struct test tests[] = {
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{
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.name = "ipv4",
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.pkt.ipv4 = {
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.eth.h_proto = __bpf_constant_htons(ETH_P_IP),
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.iph.ihl = 5,
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.iph.protocol = IPPROTO_TCP,
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.iph.tot_len = __bpf_constant_htons(MAGIC_BYTES),
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.tcp.doff = 5,
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},
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.keys = {
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.nhoff = 0,
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.thoff = sizeof(struct iphdr),
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.addr_proto = ETH_P_IP,
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.ip_proto = IPPROTO_TCP,
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.n_proto = __bpf_constant_htons(ETH_P_IP),
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},
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},
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{
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.name = "ipv6",
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.pkt.ipv6 = {
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.eth.h_proto = __bpf_constant_htons(ETH_P_IPV6),
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.iph.nexthdr = IPPROTO_TCP,
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.iph.payload_len = __bpf_constant_htons(MAGIC_BYTES),
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.tcp.doff = 5,
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},
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.keys = {
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.nhoff = 0,
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.thoff = sizeof(struct ipv6hdr),
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.addr_proto = ETH_P_IPV6,
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.ip_proto = IPPROTO_TCP,
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.n_proto = __bpf_constant_htons(ETH_P_IPV6),
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},
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},
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{
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.name = "802.1q-ipv4",
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.pkt.svlan_ipv4 = {
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.eth.h_proto = __bpf_constant_htons(ETH_P_8021Q),
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.vlan_proto = __bpf_constant_htons(ETH_P_IP),
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.iph.ihl = 5,
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.iph.protocol = IPPROTO_TCP,
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.iph.tot_len = __bpf_constant_htons(MAGIC_BYTES),
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.tcp.doff = 5,
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},
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.keys = {
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.nhoff = VLAN_HLEN,
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.thoff = VLAN_HLEN + sizeof(struct iphdr),
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.addr_proto = ETH_P_IP,
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.ip_proto = IPPROTO_TCP,
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.n_proto = __bpf_constant_htons(ETH_P_IP),
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},
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},
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{
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.name = "802.1ad-ipv6",
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.pkt.dvlan_ipv6 = {
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.eth.h_proto = __bpf_constant_htons(ETH_P_8021AD),
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.vlan_proto = __bpf_constant_htons(ETH_P_8021Q),
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.vlan_proto2 = __bpf_constant_htons(ETH_P_IPV6),
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.iph.nexthdr = IPPROTO_TCP,
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.iph.payload_len = __bpf_constant_htons(MAGIC_BYTES),
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.tcp.urg_ptr = 123,
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.tcp.doff = 5,
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};
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static struct bpf_flow_keys pkt_vlan_v6_flow_keys = {
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},
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.keys = {
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.nhoff = VLAN_HLEN * 2,
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.thoff = VLAN_HLEN * 2 + sizeof(struct ipv6hdr),
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.addr_proto = ETH_P_IPV6,
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.ip_proto = IPPROTO_TCP,
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.n_proto = __bpf_constant_htons(ETH_P_IPV6),
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},
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},
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};
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void test_flow_dissector(void)
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{
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struct bpf_flow_keys flow_keys;
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struct bpf_object *obj;
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__u32 duration, retval;
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int err, prog_fd;
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__u32 size;
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err = bpf_flow_load(&obj, "./bpf_flow.o", "flow_dissector",
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"jmp_table", &prog_fd);
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@ -106,35 +152,24 @@ void test_flow_dissector(void)
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return;
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}
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err = bpf_prog_test_run(prog_fd, 10, &pkt_v4, sizeof(pkt_v4),
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&flow_keys, &size, &retval, &duration);
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CHECK(size != sizeof(flow_keys) || err || retval != 1, "ipv4",
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"err %d errno %d retval %d duration %d size %u/%lu\n",
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err, errno, retval, duration, size, sizeof(flow_keys));
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CHECK_FLOW_KEYS("ipv4_flow_keys", flow_keys, pkt_v4_flow_keys);
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for (int i = 0; i < ARRAY_SIZE(tests); i++) {
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struct bpf_flow_keys flow_keys;
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struct bpf_prog_test_run_attr tattr = {
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.prog_fd = prog_fd,
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.data_in = &tests[i].pkt,
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.data_size_in = sizeof(tests[i].pkt),
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.data_out = &flow_keys,
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};
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err = bpf_prog_test_run(prog_fd, 10, &pkt_v6, sizeof(pkt_v6),
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&flow_keys, &size, &retval, &duration);
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CHECK(size != sizeof(flow_keys) || err || retval != 1, "ipv6",
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err = bpf_prog_test_run_xattr(&tattr);
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CHECK_ATTR(tattr.data_size_out != sizeof(flow_keys) ||
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err || tattr.retval != 1,
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tests[i].name,
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"err %d errno %d retval %d duration %d size %u/%lu\n",
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err, errno, retval, duration, size, sizeof(flow_keys));
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CHECK_FLOW_KEYS("ipv6_flow_keys", flow_keys, pkt_v6_flow_keys);
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err = bpf_prog_test_run(prog_fd, 10, &pkt_vlan_v4, sizeof(pkt_vlan_v4),
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&flow_keys, &size, &retval, &duration);
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CHECK(size != sizeof(flow_keys) || err || retval != 1, "vlan_ipv4",
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"err %d errno %d retval %d duration %d size %u/%lu\n",
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err, errno, retval, duration, size, sizeof(flow_keys));
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CHECK_FLOW_KEYS("vlan_ipv4_flow_keys", flow_keys,
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pkt_vlan_v4_flow_keys);
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err = bpf_prog_test_run(prog_fd, 10, &pkt_vlan_v6, sizeof(pkt_vlan_v6),
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&flow_keys, &size, &retval, &duration);
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CHECK(size != sizeof(flow_keys) || err || retval != 1, "vlan_ipv6",
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"err %d errno %d retval %d duration %d size %u/%lu\n",
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err, errno, retval, duration, size, sizeof(flow_keys));
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CHECK_FLOW_KEYS("vlan_ipv6_flow_keys", flow_keys,
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pkt_vlan_v6_flow_keys);
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err, errno, tattr.retval, tattr.duration,
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tattr.data_size_out, sizeof(flow_keys));
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CHECK_FLOW_KEYS(tests[i].name, flow_keys, tests[i].keys);
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}
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bpf_object__close(obj);
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}
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