Squash to "selftests/bpf: Add mptcp subflow subtest"

Close client_fd as Martin suggested.

Please update my email address of this patch squashed to as:

  From: Geliang Tang <[email protected]>

since BPF CI complained about it:

WARNING: From:/Signed-off-by: email address mismatch: 'From: Geliang Tang <[email protected]>' != 'Signed-off-by: Geliang Tang <[email protected]>'

Signed-off-by: Geliang Tang <[email protected]>

Author: Geliang Tang

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

@@ -383,19 +383,20 @@ static void run_subflow(char *new)
 {
 	int server_fd, client_fd, err;
 	char cc[TCP_CA_NAME_MAX];
-	socklen_t len = sizeof(cc);
+	socklen_t len;
 
 	server_fd = start_mptcp_server(AF_INET, ADDR_1, PORT_1, 0);
 	if (!ASSERT_GE(server_fd, 0, "start_mptcp_server"))
 		return;
 
 	client_fd = connect_to_fd(server_fd, 0);
 	if (!ASSERT_GE(client_fd, 0, "connect to fd"))
-		goto fail;
+		goto close_server;
 
+	len = sizeof(cc);
 	err = getsockopt(server_fd, SOL_TCP, TCP_CONGESTION, cc, &len);
-	if (!ASSERT_OK(err, "getsockopt(srv_fd, TCP_CONGESTION)"))
-		goto fail;
+	if (!ASSERT_OK(err, "getsockopt(server_fd, TCP_CONGESTION)"))
+		goto close_client;
 
 	send_byte(client_fd);
 
@@ -404,8 +405,9 @@ static void run_subflow(char *new)
 	ASSERT_OK(ss_search(ADDR_1, new), "ss_search new cc");
 	ASSERT_OK(ss_search(ADDR_2, cc), "ss_search default cc");
 
+close_client:
 	close(client_fd);
-fail:
+close_server:
 	close(server_fd);
 }