diff options
Diffstat (limited to 'net/ipv4/tcp_recovery.c')
| -rw-r--r-- | net/ipv4/tcp_recovery.c | 27 |
1 files changed, 12 insertions, 15 deletions
diff --git a/net/ipv4/tcp_recovery.c b/net/ipv4/tcp_recovery.c index fd113f6226ef..c52fd3254b6e 100644 --- a/net/ipv4/tcp_recovery.c +++ b/net/ipv4/tcp_recovery.c @@ -2,14 +2,9 @@ #include <linux/tcp.h> #include <net/tcp.h> -static bool tcp_rack_sent_after(u64 t1, u64 t2, u32 seq1, u32 seq2) -{ - return t1 > t2 || (t1 == t2 && after(seq1, seq2)); -} - static u32 tcp_rack_reo_wnd(const struct sock *sk) { - struct tcp_sock *tp = tcp_sk(sk); + const struct tcp_sock *tp = tcp_sk(sk); if (!tp->reord_seen) { /* If reordering has not been observed, be aggressive during @@ -19,7 +14,8 @@ static u32 tcp_rack_reo_wnd(const struct sock *sk) return 0; if (tp->sacked_out >= tp->reordering && - !(sock_net(sk)->ipv4.sysctl_tcp_recovery & TCP_RACK_NO_DUPTHRESH)) + !(READ_ONCE(sock_net(sk)->ipv4.sysctl_tcp_recovery) & + TCP_RACK_NO_DUPTHRESH)) return 0; } @@ -39,7 +35,7 @@ s32 tcp_rack_skb_timeout(struct tcp_sock *tp, struct sk_buff *skb, u32 reo_wnd) tcp_stamp_us_delta(tp->tcp_mstamp, tcp_skb_timestamp_us(skb)); } -/* RACK loss detection (IETF draft draft-ietf-tcpm-rack-01): +/* RACK loss detection (IETF RFC8985): * * Marks a packet lost, if some packet sent later has been (s)acked. * The underlying idea is similar to the traditional dupthresh and FACK @@ -77,9 +73,9 @@ static void tcp_rack_detect_loss(struct sock *sk, u32 *reo_timeout) !(scb->sacked & TCPCB_SACKED_RETRANS)) continue; - if (!tcp_rack_sent_after(tp->rack.mstamp, - tcp_skb_timestamp_us(skb), - tp->rack.end_seq, scb->end_seq)) + if (!tcp_skb_sent_after(tp->rack.mstamp, + tcp_skb_timestamp_us(skb), + tp->rack.end_seq, scb->end_seq)) break; /* A packet is lost if it has not been s/acked beyond @@ -108,7 +104,7 @@ bool tcp_rack_mark_lost(struct sock *sk) tp->rack.advanced = 0; tcp_rack_detect_loss(sk, &timeout); if (timeout) { - timeout = usecs_to_jiffies(timeout) + TCP_TIMEOUT_MIN; + timeout = usecs_to_jiffies(timeout + TCP_TIMEOUT_MIN_US); inet_csk_reset_xmit_timer(sk, ICSK_TIME_REO_TIMEOUT, timeout, inet_csk(sk)->icsk_rto); } @@ -140,8 +136,8 @@ void tcp_rack_advance(struct tcp_sock *tp, u8 sacked, u32 end_seq, } tp->rack.advanced = 1; tp->rack.rtt_us = rtt_us; - if (tcp_rack_sent_after(xmit_time, tp->rack.mstamp, - end_seq, tp->rack.end_seq)) { + if (tcp_skb_sent_after(xmit_time, tp->rack.mstamp, + end_seq, tp->rack.end_seq)) { tp->rack.mstamp = xmit_time; tp->rack.end_seq = end_seq; } @@ -192,7 +188,8 @@ void tcp_rack_update_reo_wnd(struct sock *sk, struct rate_sample *rs) { struct tcp_sock *tp = tcp_sk(sk); - if (sock_net(sk)->ipv4.sysctl_tcp_recovery & TCP_RACK_STATIC_REO_WND || + if ((READ_ONCE(sock_net(sk)->ipv4.sysctl_tcp_recovery) & + TCP_RACK_STATIC_REO_WND) || !rs->prior_delivered) return; |