Symbol: copyfd_io
tools/testing/selftests/net/mptcp/mptcp_connect.c
1217
err = copyfd_io(fd, remotesock, 1, true, &winfo);
tools/testing/selftests/net/mptcp/mptcp_connect.c
1403
ret = copyfd_io(fd_in, fd, 1, 0, &winfo);