bpf: Add test for SO_REUSEPORT_DETACH_BPF

This patch adds a test for the new sockopt SO_REUSEPORT_DETACH_BPF.

Signed-off-by: Martin KaFai Lau <kafai@fb.com>
Reviewed-by: Stanislav Fomichev <sdf@google.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>

diff --git a/tools/testing/selftests/bpf/test_select_reuseport.c b/tools/testing/selftests/bpf/test_select_reuseport.c
index 75646d9..7566c13 100644 (file)
--- a/tools/testing/selftests/bpf/test_select_reuseport.c
+++ b/tools/testing/selftests/bpf/test_select_reuseport.c
@@ -523,6 +523,58 @@ static void test_pass_on_err(int type, sa_family_t family)
        printf("OK\n");
 }
 
+static void test_detach_bpf(int type, sa_family_t family)
+{
+#ifdef SO_DETACH_REUSEPORT_BPF
+       __u32 nr_run_before = 0, nr_run_after = 0, tmp, i;
+       struct epoll_event ev;
+       int cli_fd, err, nev;
+       struct cmd cmd = {};
+       int optvalue = 0;
+
+       printf("%s: ", __func__);
+       err = setsockopt(sk_fds[0], SOL_SOCKET, SO_DETACH_REUSEPORT_BPF,
+                        &optvalue, sizeof(optvalue));
+       CHECK(err == -1, "setsockopt(SO_DETACH_REUSEPORT_BPF)",
+             "err:%d errno:%d\n", err, errno);
+
+       err = setsockopt(sk_fds[1], SOL_SOCKET, SO_DETACH_REUSEPORT_BPF,
+                        &optvalue, sizeof(optvalue));
+       CHECK(err == 0 || errno != ENOENT, "setsockopt(SO_DETACH_REUSEPORT_BPF)",
+             "err:%d errno:%d\n", err, errno);
+
+       for (i = 0; i < NR_RESULTS; i++) {
+               err = bpf_map_lookup_elem(result_map, &i, &tmp);
+               CHECK(err == -1, "lookup_elem(result_map)",
+                     "i:%u err:%d errno:%d\n", i, err, errno);
+               nr_run_before += tmp;
+       }
+
+       cli_fd = send_data(type, family, &cmd, sizeof(cmd), PASS);
+       nev = epoll_wait(epfd, &ev, 1, 5);
+       CHECK(nev <= 0, "nev <= 0",
+             "nev:%d expected:1 type:%d family:%d data:(0, 0)\n",
+             nev,  type, family);
+
+       for (i = 0; i < NR_RESULTS; i++) {
+               err = bpf_map_lookup_elem(result_map, &i, &tmp);
+               CHECK(err == -1, "lookup_elem(result_map)",
+                     "i:%u err:%d errno:%d\n", i, err, errno);
+               nr_run_after += tmp;
+       }
+
+       CHECK(nr_run_before != nr_run_after,
+             "nr_run_before != nr_run_after",
+             "nr_run_before:%u nr_run_after:%u\n",
+             nr_run_before, nr_run_after);
+
+       printf("OK\n");
+       close(cli_fd);
+#else
+       printf("%s: SKIP\n", __func__);
+#endif
+}
+
 static void prepare_sk_fds(int type, sa_family_t family, bool inany)
 {
        const int first = REUSEPORT_ARRAY_SIZE - 1;
@@ -664,6 +716,8 @@ static void test_all(void)
                        test_pass(type, family);
                        test_syncookie(type, family);
                        test_pass_on_err(type, family);
+                       /* Must be the last test */
+                       test_detach_bpf(type, family);
 
                        cleanup_per_test();
                        printf("\n");