diff options
Diffstat (limited to 'net/ipv4/tcp_input.c')
| -rw-r--r-- | net/ipv4/tcp_input.c | 12 |
1 files changed, 10 insertions, 2 deletions
diff --git a/net/ipv4/tcp_input.c b/net/ipv4/tcp_input.c index 734cfc8ff76e..9550cc42de2d 100644 --- a/net/ipv4/tcp_input.c +++ b/net/ipv4/tcp_input.c @@ -579,6 +579,7 @@ void tcp_rcv_space_adjust(struct sock *sk) int time; int copied; + tcp_mstamp_refresh(tp); time = tcp_stamp_us_delta(tp->tcp_mstamp, tp->rcvq_space.time); if (time < (tp->rcv_rtt_est.rtt_us >> 3) || tp->rcv_rtt_est.rtt_us == 0) return; @@ -1941,6 +1942,8 @@ void tcp_enter_loss(struct sock *sk) if (is_reneg) { NET_INC_STATS(sock_net(sk), LINUX_MIB_TCPSACKRENEGING); tp->sacked_out = 0; + /* Mark SACK reneging until we recover from this loss event. */ + tp->is_sack_reneg = 1; } tcp_clear_all_retrans_hints(tp); @@ -2326,6 +2329,7 @@ static void tcp_undo_cwnd_reduction(struct sock *sk, bool unmark_loss) } tp->snd_cwnd_stamp = tcp_jiffies32; tp->undo_marker = 0; + tp->rack.advanced = 1; /* Force RACK to re-exam losses */ } static inline bool tcp_may_undo(const struct tcp_sock *tp) @@ -2364,6 +2368,7 @@ static bool tcp_try_undo_recovery(struct sock *sk) return true; } tcp_set_ca_state(sk, TCP_CA_Open); + tp->is_sack_reneg = 0; return false; } @@ -2397,8 +2402,10 @@ static bool tcp_try_undo_loss(struct sock *sk, bool frto_undo) NET_INC_STATS(sock_net(sk), LINUX_MIB_TCPSPURIOUSRTOS); inet_csk(sk)->icsk_retransmits = 0; - if (frto_undo || tcp_is_sack(tp)) + if (frto_undo || tcp_is_sack(tp)) { tcp_set_ca_state(sk, TCP_CA_Open); + tp->is_sack_reneg = 0; + } return true; } return false; @@ -3495,6 +3502,7 @@ static int tcp_ack(struct sock *sk, const struct sk_buff *skb, int flag) struct tcp_sacktag_state sack_state; struct rate_sample rs = { .prior_delivered = 0 }; u32 prior_snd_una = tp->snd_una; + bool is_sack_reneg = tp->is_sack_reneg; u32 ack_seq = TCP_SKB_CB(skb)->seq; u32 ack = TCP_SKB_CB(skb)->ack_seq; bool is_dupack = false; @@ -3611,7 +3619,7 @@ static int tcp_ack(struct sock *sk, const struct sk_buff *skb, int flag) delivered = tp->delivered - delivered; /* freshly ACKed or SACKed */ lost = tp->lost - lost; /* freshly marked lost */ - tcp_rate_gen(sk, delivered, lost, sack_state.rate); + tcp_rate_gen(sk, delivered, lost, is_sack_reneg, sack_state.rate); tcp_cong_control(sk, ack, delivered, flag, sack_state.rate); tcp_xmit_recovery(sk, rexmit); return 1; |