retransmits_timed_out
if (retransmits_timed_out(sk, READ_ONCE(net->ipv4.sysctl_tcp_retries1), 0)) {
!retransmits_timed_out(sk, retry_until, 0);
expired = retransmits_timed_out(sk, retry_until,
if (retransmits_timed_out(sk, READ_ONCE(net->ipv4.sysctl_tcp_retries1) + 1, 0))