tree c64ca59aef09b3d659223e71f9282631a9289787
parent 700163db3de397a7557831e1eb9b8ce60e55590a
author Yuchung Cheng <ycheng@google.com> 1359659806 -0800
committer David S. Miller <davem@davemloft.net> 1359660007 -0500

tcp: detect SYN/data drop when F-RTO is disabled

On receiving the SYN-ACK, Fast Open checks icsk_retransmit for SYN
retransmission to detect SYN/data drops. But if F-RTO is disabled,
icsk_retransmit is reset at step D of tcp_fastretrans_alert() (
under tcp_ack()) before tcp_rcv_fastopen_synack(). The fix is to use
total_retrans instead which accounts for SYN retransmission regardless
the use of F-RTO.

Signed-off-by: Yuchung Cheng <ycheng@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>