From 02ee0658362d3713421851bb7487af77a4098bb5 Mon Sep 17 00:00:00 2001 From: Stanislav Fomichev Date: Mon, 22 Apr 2019 08:55:52 -0700 Subject: bpf/flow_dissector: don't adjust nhoff by ETH_HLEN in BPF_PROG_TEST_RUN Now that we use skb-less flow dissector let's return true nhoff and thoff. We used to adjust them by ETH_HLEN because that's how it was done in the skb case. For VLAN tests that looks confusing: nhoff is pointing to vlan parts :-\ Warning, this is an API change for BPF_PROG_TEST_RUN! Feel free to drop if you think that it's too late at this point to fix it. Signed-off-by: Stanislav Fomichev Signed-off-by: Daniel Borkmann --- .../selftests/bpf/prog_tests/flow_dissector.c | 23 +++++++++------------- 1 file changed, 9 insertions(+), 14 deletions(-) (limited to 'tools/testing/selftests/bpf') diff --git a/tools/testing/selftests/bpf/prog_tests/flow_dissector.c b/tools/testing/selftests/bpf/prog_tests/flow_dissector.c index 51758a0ca55e..8b54adfd6264 100644 --- a/tools/testing/selftests/bpf/prog_tests/flow_dissector.c +++ b/tools/testing/selftests/bpf/prog_tests/flow_dissector.c @@ -82,8 +82,8 @@ struct test tests[] = { .tcp.doff = 5, }, .keys = { - .nhoff = 0, - .thoff = sizeof(struct iphdr), + .nhoff = ETH_HLEN, + .thoff = ETH_HLEN + sizeof(struct iphdr), .addr_proto = ETH_P_IP, .ip_proto = IPPROTO_TCP, .n_proto = __bpf_constant_htons(ETH_P_IP), @@ -98,8 +98,8 @@ struct test tests[] = { .tcp.doff = 5, }, .keys = { - .nhoff = 0, - .thoff = sizeof(struct ipv6hdr), + .nhoff = ETH_HLEN, + .thoff = ETH_HLEN + sizeof(struct ipv6hdr), .addr_proto = ETH_P_IPV6, .ip_proto = IPPROTO_TCP, .n_proto = __bpf_constant_htons(ETH_P_IPV6), @@ -116,8 +116,8 @@ struct test tests[] = { .tcp.doff = 5, }, .keys = { - .nhoff = VLAN_HLEN, - .thoff = VLAN_HLEN + sizeof(struct iphdr), + .nhoff = ETH_HLEN + VLAN_HLEN, + .thoff = ETH_HLEN + VLAN_HLEN + sizeof(struct iphdr), .addr_proto = ETH_P_IP, .ip_proto = IPPROTO_TCP, .n_proto = __bpf_constant_htons(ETH_P_IP), @@ -134,8 +134,9 @@ struct test tests[] = { .tcp.doff = 5, }, .keys = { - .nhoff = VLAN_HLEN * 2, - .thoff = VLAN_HLEN * 2 + sizeof(struct ipv6hdr), + .nhoff = ETH_HLEN + VLAN_HLEN * 2, + .thoff = ETH_HLEN + VLAN_HLEN * 2 + + sizeof(struct ipv6hdr), .addr_proto = ETH_P_IPV6, .ip_proto = IPPROTO_TCP, .n_proto = __bpf_constant_htons(ETH_P_IPV6), @@ -238,9 +239,6 @@ void test_flow_dissector(void) * We use a known path in the net/tun driver that calls * eth_get_headlen and we manually export bpf_flow_keys * via BPF map in this case. - * - * Note, that since eth_get_headlen operates on a L2 level, - * we adjust exported nhoff/thoff by ETH_HLEN. */ err = bpf_prog_attach(prog_fd, 0, BPF_FLOW_DISSECTOR, 0); @@ -262,9 +260,6 @@ void test_flow_dissector(void) err = bpf_map_lookup_elem(keys_fd, &key, &flow_keys); CHECK_ATTR(err, tests[i].name, "bpf_map_lookup_elem %d\n", err); - flow_keys.nhoff -= ETH_HLEN; - flow_keys.thoff -= ETH_HLEN; - CHECK_ATTR(err, tests[i].name, "skb-less err %d\n", err); CHECK_FLOW_KEYS(tests[i].name, flow_keys, tests[i].keys); } -- cgit v1.2.3-59-g8ed1b