diff options
| author |   Yuchung Cheng <ycheng@google.com> | 2018-05-16 16:40:16 -0700 |
|---|---|---|
| committer |   David S. Miller <davem@davemloft.net> | 2018-05-17 15:41:29 -0400 |
| commit | b8fef65a8a76c2f887c56bf8e9684ff04e8d3b9f (patch) | |
| tree | c6126e6ae98c561fa0d1a77593c367d779737771 /net/ipv4/tcp_recovery.c | |
| parent | tcp: separate loss marking and state update on RTO (diff) | |
| download | linux-dev-b8fef65a8a76c2f887c56bf8e9684ff04e8d3b9f.tar.xz linux-dev-b8fef65a8a76c2f887c56bf8e9684ff04e8d3b9f.zip | |
tcp: new helper tcp_rack_skb_timeout
Create and export a new helper tcp_rack_skb_timeout and move tcp_is_rack
to prepare the final RTO change.
Signed-off-by: Yuchung Cheng <ycheng@google.com>
Signed-off-by: Neal Cardwell <ncardwell@google.com>
Reviewed-by: Eric Dumazet <edumazet@google.com>
Reviewed-by: Soheil Hassas Yeganeh <soheil@google.com>
Reviewed-by: Priyaranjan Jha <priyarjha@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/ipv4/tcp_recovery.c')
| -rw-r--r-- | net/ipv4/tcp_recovery.c | 9 |
1 files changed, 7 insertions, 2 deletions
diff --git a/net/ipv4/tcp_recovery.c b/net/ipv4/tcp_recovery.c index b2f9be388bf3..30cbfb69b1de 100644 --- a/net/ipv4/tcp_recovery.c +++ b/net/ipv4/tcp_recovery.c @@ -47,6 +47,12 @@ u32 tcp_rack_reo_wnd(const struct sock *sk) tp->srtt_us >> 3); } +s32 tcp_rack_skb_timeout(struct tcp_sock *tp, struct sk_buff *skb, u32 reo_wnd) +{ + return tp->rack.rtt_us + reo_wnd - + tcp_stamp_us_delta(tp->tcp_mstamp, skb->skb_mstamp); +} + /* RACK loss detection (IETF draft draft-ietf-tcpm-rack-01): * * Marks a packet lost, if some packet sent later has been (s)acked. @@ -92,8 +98,7 @@ static void tcp_rack_detect_loss(struct sock *sk, u32 *reo_timeout) /* A packet is lost if it has not been s/acked beyond * the recent RTT plus the reordering window. */ - remaining = tp->rack.rtt_us + reo_wnd - - tcp_stamp_us_delta(tp->tcp_mstamp, skb->skb_mstamp); + remaining = tcp_rack_skb_timeout(tp, skb, reo_wnd); if (remaining <= 0) { tcp_mark_skb_lost(sk, skb); list_del_init(&skb->tcp_tsorted_anchor); |