sock_get_timeout
int sock_get_timeout(long timeo, void *optval, bool old_timeval);
lv = sock_get_timeout(READ_ONCE(sk->sk_rcvtimeo), &v,
lv = sock_get_timeout(READ_ONCE(sk->sk_sndtimeo), &v,
EXPORT_SYMBOL(sock_get_timeout);
lv = sock_get_timeout(vsk->connect_timeout, &v,