Commit 693fe954 authored by Mahe Tardy's avatar Mahe Tardy Committed by Martin KaFai Lau
Browse files

selftests/bpf: add tcx netns cookie tests 



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

Signed-off-by: default avatarMahe Tardy <mahe.tardy@gmail.com>
Link: https://lore.kernel.org/r/20241007095958.97442-2-mahe.tardy@gmail.com


Signed-off-by: default avatarMartin KaFai Lau <martin.lau@kernel.org>
parent eb62f49d

tools/testing/selftests/bpf/prog_tests/netns_cookie.c

+22 −7
Original line number Diff line number Diff line
@@ -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)

tools/testing/selftests/bpf/progs/netns_cookie_prog.c

+10 −0
Original line number Diff line number Diff line
@@ -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";