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selftests/bpf: add tcx netns cookie tests

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Add netns cookie test that verifies the helper is now supported and work
in the context of tc programs.

Signed-off-by: Mahe Tardy <mahe.tardy@gmail.com>
Link: https://lore.kernel.org/r/20241007095958.97442-2-mahe.tardy@gmail.com
Signed-off-by: Martin KaFai Lau <martin.lau@kernel.org>
This commit is contained in:
Mahe Tardy 2024-10-07 09:59:58 +00:00 committed by Martin KaFai Lau
parent eb62f49de7
commit 693fe954d6
2 changed files with 32 additions and 7 deletions
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29
tools/testing/selftests/bpf/prog_tests/netns_cookie.c
View File

@ -8,12 +8,16 @@
#define SO_NETNS_COOKIE 71
#endif
#define loopback 1
static int duration;
void test_netns_cookie(void)
{
LIBBPF_OPTS(bpf_prog_attach_opts, opta);
LIBBPF_OPTS(bpf_prog_detach_opts, optd);
int server_fd = -1, client_fd = -1, cgroup_fd = -1;
int err, val, ret, map, verdict;
int err, val, ret, map, verdict, tc_fd;
struct netns_cookie_prog *skel;
uint64_t cookie_expected_value;
socklen_t vallen = sizeof(cookie_expected_value);
@ -38,36 +42,47 @@ void test_netns_cookie(void)
if (!ASSERT_OK(err, "prog_attach"))
goto done;
tc_fd = bpf_program__fd(skel->progs.get_netns_cookie_tcx);
err = bpf_prog_attach_opts(tc_fd, loopback, BPF_TCX_INGRESS, &opta);
if (!ASSERT_OK(err, "prog_attach"))
goto done;
server_fd = start_server(AF_INET6, SOCK_STREAM, "::1", 0, 0);
if (CHECK(server_fd < 0, "start_server", "errno %d\n", errno))
goto done;
goto cleanup_tc;
client_fd = connect_to_fd(server_fd, 0);
if (CHECK(client_fd < 0, "connect_to_fd", "errno %d\n", errno))
goto done;
goto cleanup_tc;
ret = send(client_fd, send_msg, sizeof(send_msg), 0);
if (CHECK(ret != sizeof(send_msg), "send(msg)", "ret:%d\n", ret))
goto done;
goto cleanup_tc;
err = bpf_map_lookup_elem(bpf_map__fd(skel->maps.sockops_netns_cookies),
&client_fd, &val);
if (!ASSERT_OK(err, "map_lookup(sockops_netns_cookies)"))
goto done;
goto cleanup_tc;
err = getsockopt(client_fd, SOL_SOCKET, SO_NETNS_COOKIE,
&cookie_expected_value, &vallen);
if (!ASSERT_OK(err, "getsockopt"))
goto done;
goto cleanup_tc;
ASSERT_EQ(val, cookie_expected_value, "cookie_value");
err = bpf_map_lookup_elem(bpf_map__fd(skel->maps.sk_msg_netns_cookies),
&client_fd, &val);
if (!ASSERT_OK(err, "map_lookup(sk_msg_netns_cookies)"))
goto done;
goto cleanup_tc;
ASSERT_EQ(val, cookie_expected_value, "cookie_value");
ASSERT_EQ(skel->bss->tcx_init_netns_cookie, cookie_expected_value, "cookie_value");
ASSERT_EQ(skel->bss->tcx_netns_cookie, cookie_expected_value, "cookie_value");
cleanup_tc:
err = bpf_prog_detach_opts(tc_fd, loopback, BPF_TCX_INGRESS, &optd);
ASSERT_OK(err, "prog_detach");
done:
if (server_fd != -1)

10
tools/testing/selftests/bpf/progs/netns_cookie_prog.c
View File

@ -27,6 +27,8 @@ struct {
__type(value, __u64);
} sock_map SEC(".maps");
int tcx_init_netns_cookie, tcx_netns_cookie;
SEC("sockops")
int get_netns_cookie_sockops(struct bpf_sock_ops *ctx)
{
@ -81,4 +83,12 @@ int get_netns_cookie_sk_msg(struct sk_msg_md *msg)
return 1;
}
SEC("tcx/ingress")
int get_netns_cookie_tcx(struct __sk_buff *skb)
{
tcx_init_netns_cookie = bpf_get_netns_cookie(NULL);
tcx_netns_cookie = bpf_get_netns_cookie(skb);
return TCX_PASS;
}
char _license[] SEC("license") = "GPL";