selftests/bpf: Migrate BPF_CGROUP_INET_SOCK_CREATE test cases to prog…

…_tests

Move the "load w/o expected_attach_type" test case to
prog_tests/sock_create.c and drop the remaining test case, as it is made
redundant with the existing coverage inside prog_tests/sock_create.c.

Signed-off-by: Jordan Rife <jrife@google.com>
Link: https://lore.kernel.org/r/20241022152913.574836-4-jrife@google.com
Signed-off-by: Martin KaFai Lau <martin.lau@kernel.org>

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

@@ -237,6 +237,19 @@ static struct sock_create_test {
 
 		.error = DENY_CREATE,
 	},
+	{
+		.descr = "load w/o expected_attach_type (compat mode)",
+		.insns = {
+			/* return 1 */
+			BPF_MOV64_IMM(BPF_REG_0, 1),
+			BPF_EXIT_INSN(),
+		},
+		.expected_attach_type = 0,
+		.attach_type = BPF_CGROUP_INET_SOCK_CREATE,
+
+		.domain = AF_INET,
+		.type = SOCK_STREAM,
+	},
 };
 
 static int load_prog(const struct bpf_insn *insns,
@@ -291,16 +304,18 @@ static int run_test(int cgroup_fd, struct sock_create_test *test)
 		goto detach_prog;
 	}
 
-	err = getsockopt(sock_fd, SOL_SOCKET, test->optname, &optval, &optlen);
-	if (err) {
-		log_err("Failed to call getsockopt");
-		goto cleanup;
-	}
-
-	if (optval != test->optval) {
-		errno = 0;
-		log_err("getsockopt returned unexpected optval");
-		goto cleanup;
+	if (test->optname) {
+		err = getsockopt(sock_fd, SOL_SOCKET, test->optname, &optval, &optlen);
+		if (err) {
+			log_err("Failed to call getsockopt");
+			goto cleanup;
+		}
+
+		if (optval != test->optval) {
+			errno = 0;
+			log_err("getsockopt returned unexpected optval");
+			goto cleanup;
+		}
 	}
 
 	ret = test->error != OK;

tools/testing/selftests/bpf/test_sock.c

@@ -47,34 +47,6 @@ struct sock_test {
 };
 
 static struct sock_test tests[] = {
-	{
-		.descr = "sock_create load w/o expected_attach_type (compat mode)",
-		.insns = {
-			BPF_MOV64_IMM(BPF_REG_0, 1),
-			BPF_EXIT_INSN(),
-		},
-		.expected_attach_type = 0,
-		.attach_type = BPF_CGROUP_INET_SOCK_CREATE,
-		.domain = AF_INET,
-		.type = SOCK_STREAM,
-		.ip = "127.0.0.1",
-		.port = 8097,
-		.result = SUCCESS,
-	},
-	{
-		.descr = "sock_create load w/ expected_attach_type",
-		.insns = {
-			BPF_MOV64_IMM(BPF_REG_0, 1),
-			BPF_EXIT_INSN(),
-		},
-		.expected_attach_type = BPF_CGROUP_INET_SOCK_CREATE,
-		.attach_type = BPF_CGROUP_INET_SOCK_CREATE,
-		.domain = AF_INET,
-		.type = SOCK_STREAM,
-		.ip = "127.0.0.1",
-		.port = 8097,
-		.result = SUCCESS,
-	},
 };
 
 static size_t probe_prog_length(const struct bpf_insn *fp)