author | Yuchung Cheng <ycheng@google.com> | |
Thu, 31 Jan 2013 19:16:46 +0000 (11:16 -0800) | ||
committer | David S. Miller <davem@davemloft.net> | |
Thu, 31 Jan 2013 19:20:07 +0000 (14:20 -0500) | ||
commit | 66555e92fb7a619188c02cceae4bbc414f15f96d | |
tree | c64ca59aef09b3d659223e71f9282631a9289787 | tree | snapshot (tar.xz tar.gz zip) |
parent | 700163db3de397a7557831e1eb9b8ce60e55590a | commit | diff |
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>
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>
net/ipv4/tcp_input.c | diff | blob | history |