ipv4, bpf: Introduced to support the ULP to modify

sockets during setopt

hulk inclusion
category: feature
bugzilla: https://gitee.com/openeuler/kernel/issues/I7LE1H

------------------------------------------------------

Currently, the ebpf program can distinguish sockets according to
the address accessed by the client, and use the ULP framework to
modify the matched sockets to delay link establishment.
Signed-off-by: Nzhang-mingyi66 <zhangmingyi5@huawei.com>

net/core/filter.c

@@ -5255,6 +5255,10 @@ static int sol_tcp_sockopt(struct sock *sk, int optname,
 		if (*optlen < 1)
 			return -EINVAL;
 		break;
+	case TCP_ULP:
+		if (getopt)
+			return -EINVAL;
+		break;
 	default:
 		if (getopt)
 			return -EINVAL;