From 16751347a060a10c09b11593bb179fd5b0240c04 Mon Sep 17 00:00:00 2001 From: Stephen Hemminger Date: Mon, 16 Jul 2007 18:35:52 -0700 Subject: [PATCH] [TCP]: remove unused argument to cong_avoid op None of the existing TCP congestion controls use the rtt value pased in the ca_ops->cong_avoid interface. Which is lucky because seq_rtt could have been -1 when handling a duplicate ack. Signed-off-by: Stephen Hemminger Signed-off-by: David S. Miller --- include/net/tcp.h | 6 ++---- net/ipv4/tcp_bic.c | 2 +- net/ipv4/tcp_cong.c | 3 +-- net/ipv4/tcp_cubic.c | 2 +- net/ipv4/tcp_highspeed.c | 2 +- net/ipv4/tcp_htcp.c | 2 +- net/ipv4/tcp_hybla.c | 4 ++-- net/ipv4/tcp_illinois.c | 2 +- net/ipv4/tcp_input.c | 8 ++++---- net/ipv4/tcp_lp.c | 5 ++--- net/ipv4/tcp_scalable.c | 2 +- net/ipv4/tcp_vegas.c | 6 +++--- net/ipv4/tcp_veno.c | 6 +++--- net/ipv4/tcp_yeah.c | 2 +- 14 files changed, 24 insertions(+), 28 deletions(-) diff --git a/include/net/tcp.h b/include/net/tcp.h index a8af9ae001..8b404b1ef7 100644 --- a/include/net/tcp.h +++ b/include/net/tcp.h @@ -652,8 +652,7 @@ struct tcp_congestion_ops { /* lower bound for congestion window (optional) */ u32 (*min_cwnd)(const struct sock *sk); /* do new cwnd calculation (required) */ - void (*cong_avoid)(struct sock *sk, u32 ack, - u32 rtt, u32 in_flight, int good_ack); + void (*cong_avoid)(struct sock *sk, u32 ack, u32 in_flight, int good_ack); /* call before changing ca_state (optional) */ void (*set_state)(struct sock *sk, u8 new_state); /* call when cwnd event occurs (optional) */ @@ -684,8 +683,7 @@ extern void tcp_slow_start(struct tcp_sock *tp); extern struct tcp_congestion_ops tcp_init_congestion_ops; extern u32 tcp_reno_ssthresh(struct sock *sk); -extern void tcp_reno_cong_avoid(struct sock *sk, u32 ack, - u32 rtt, u32 in_flight, int flag); +extern void tcp_reno_cong_avoid(struct sock *sk, u32 ack, u32 in_flight, int flag); extern u32 tcp_reno_min_cwnd(const struct sock *sk); extern struct tcp_congestion_ops tcp_reno; diff --git a/net/ipv4/tcp_bic.c b/net/ipv4/tcp_bic.c index dd9ef65ad3..519de091a9 100644 --- a/net/ipv4/tcp_bic.c +++ b/net/ipv4/tcp_bic.c @@ -137,7 +137,7 @@ static inline void bictcp_update(struct bictcp *ca, u32 cwnd) } static void bictcp_cong_avoid(struct sock *sk, u32 ack, - u32 seq_rtt, u32 in_flight, int data_acked) + u32 in_flight, int data_acked) { struct tcp_sock *tp = tcp_sk(sk); struct bictcp *ca = inet_csk_ca(sk); diff --git a/net/ipv4/tcp_cong.c b/net/ipv4/tcp_cong.c index 1260e52ad7..55fca1820c 100644 --- a/net/ipv4/tcp_cong.c +++ b/net/ipv4/tcp_cong.c @@ -324,8 +324,7 @@ EXPORT_SYMBOL_GPL(tcp_slow_start); /* This is Jacobson's slow start and congestion avoidance. * SIGCOMM '88, p. 328. */ -void tcp_reno_cong_avoid(struct sock *sk, u32 ack, u32 rtt, u32 in_flight, - int flag) +void tcp_reno_cong_avoid(struct sock *sk, u32 ack, u32 in_flight, int flag) { struct tcp_sock *tp = tcp_sk(sk); diff --git a/net/ipv4/tcp_cubic.c b/net/ipv4/tcp_cubic.c index ebfaac2f9f..d17da30d82 100644 --- a/net/ipv4/tcp_cubic.c +++ b/net/ipv4/tcp_cubic.c @@ -270,7 +270,7 @@ static inline void measure_delay(struct sock *sk) } static void bictcp_cong_avoid(struct sock *sk, u32 ack, - u32 seq_rtt, u32 in_flight, int data_acked) + u32 in_flight, int data_acked) { struct tcp_sock *tp = tcp_sk(sk); struct bictcp *ca = inet_csk_ca(sk); diff --git a/net/ipv4/tcp_highspeed.c b/net/ipv4/tcp_highspeed.c index 43d624e504..14a073d8b6 100644 --- a/net/ipv4/tcp_highspeed.c +++ b/net/ipv4/tcp_highspeed.c @@ -109,7 +109,7 @@ static void hstcp_init(struct sock *sk) tp->snd_cwnd_clamp = min_t(u32, tp->snd_cwnd_clamp, 0xffffffff/128); } -static void hstcp_cong_avoid(struct sock *sk, u32 adk, u32 rtt, +static void hstcp_cong_avoid(struct sock *sk, u32 adk, u32 in_flight, int data_acked) { struct tcp_sock *tp = tcp_sk(sk); diff --git a/net/ipv4/tcp_htcp.c b/net/ipv4/tcp_htcp.c index 4ba4a7ae0a..632c05a758 100644 --- a/net/ipv4/tcp_htcp.c +++ b/net/ipv4/tcp_htcp.c @@ -225,7 +225,7 @@ static u32 htcp_recalc_ssthresh(struct sock *sk) return max((tp->snd_cwnd * ca->beta) >> 7, 2U); } -static void htcp_cong_avoid(struct sock *sk, u32 ack, u32 rtt, +static void htcp_cong_avoid(struct sock *sk, u32 ack, s32 rtt, u32 in_flight, int data_acked) { struct tcp_sock *tp = tcp_sk(sk); diff --git a/net/ipv4/tcp_hybla.c b/net/ipv4/tcp_hybla.c index e5be351172..b3e55cf561 100644 --- a/net/ipv4/tcp_hybla.c +++ b/net/ipv4/tcp_hybla.c @@ -85,7 +85,7 @@ static inline u32 hybla_fraction(u32 odds) * o Give cwnd a new value based on the model proposed * o remember increments <1 */ -static void hybla_cong_avoid(struct sock *sk, u32 ack, u32 rtt, +static void hybla_cong_avoid(struct sock *sk, u32 ack, u32 in_flight, int flag) { struct tcp_sock *tp = tcp_sk(sk); @@ -103,7 +103,7 @@ static void hybla_cong_avoid(struct sock *sk, u32 ack, u32 rtt, return; if (!ca->hybla_en) - return tcp_reno_cong_avoid(sk, ack, rtt, in_flight, flag); + return tcp_reno_cong_avoid(sk, ack, in_flight, flag); if (ca->rho == 0) hybla_recalc_param(sk); diff --git a/net/ipv4/tcp_illinois.c b/net/ipv4/tcp_illinois.c index b2b2256d3b..cc5de6f69d 100644 --- a/net/ipv4/tcp_illinois.c +++ b/net/ipv4/tcp_illinois.c @@ -258,7 +258,7 @@ static void tcp_illinois_state(struct sock *sk, u8 new_state) /* * Increase window in response to successful acknowledgment. */ -static void tcp_illinois_cong_avoid(struct sock *sk, u32 ack, u32 rtt, +static void tcp_illinois_cong_avoid(struct sock *sk, u32 ack, u32 in_flight, int flag) { struct tcp_sock *tp = tcp_sk(sk); diff --git a/net/ipv4/tcp_input.c b/net/ipv4/tcp_input.c index 4e5884ac8f..fec8a7a4db 100644 --- a/net/ipv4/tcp_input.c +++ b/net/ipv4/tcp_input.c @@ -2323,11 +2323,11 @@ static inline void tcp_ack_update_rtt(struct sock *sk, const int flag, tcp_ack_no_tstamp(sk, seq_rtt, flag); } -static void tcp_cong_avoid(struct sock *sk, u32 ack, u32 rtt, +static void tcp_cong_avoid(struct sock *sk, u32 ack, u32 in_flight, int good) { const struct inet_connection_sock *icsk = inet_csk(sk); - icsk->icsk_ca_ops->cong_avoid(sk, ack, rtt, in_flight, good); + icsk->icsk_ca_ops->cong_avoid(sk, ack, in_flight, good); tcp_sk(sk)->snd_cwnd_stamp = tcp_time_stamp; } @@ -2826,11 +2826,11 @@ static int tcp_ack(struct sock *sk, struct sk_buff *skb, int flag) /* Advance CWND, if state allows this. */ if ((flag & FLAG_DATA_ACKED) && !frto_cwnd && tcp_may_raise_cwnd(sk, flag)) - tcp_cong_avoid(sk, ack, seq_rtt, prior_in_flight, 0); + tcp_cong_avoid(sk, ack, prior_in_flight, 0); tcp_fastretrans_alert(sk, prior_snd_una, prior_packets, flag); } else { if ((flag & FLAG_DATA_ACKED) && !frto_cwnd) - tcp_cong_avoid(sk, ack, seq_rtt, prior_in_flight, 1); + tcp_cong_avoid(sk, ack, prior_in_flight, 1); } if ((flag & FLAG_FORWARD_PROGRESS) || !(flag&FLAG_NOT_DUP)) diff --git a/net/ipv4/tcp_lp.c b/net/ipv4/tcp_lp.c index e49836ce01..80e140e3ec 100644 --- a/net/ipv4/tcp_lp.c +++ b/net/ipv4/tcp_lp.c @@ -115,13 +115,12 @@ static void tcp_lp_init(struct sock *sk) * Will only call newReno CA when away from inference. * From TCP-LP's paper, this will be handled in additive increasement. */ -static void tcp_lp_cong_avoid(struct sock *sk, u32 ack, u32 rtt, u32 in_flight, - int flag) +static void tcp_lp_cong_avoid(struct sock *sk, u32 ack, u32 in_flight, int flag) { struct lp *lp = inet_csk_ca(sk); if (!(lp->flag & LP_WITHIN_INF)) - tcp_reno_cong_avoid(sk, ack, rtt, in_flight, flag); + tcp_reno_cong_avoid(sk, ack, in_flight, flag); } /** diff --git a/net/ipv4/tcp_scalable.c b/net/ipv4/tcp_scalable.c index 4624501e96..be27a33a1c 100644 --- a/net/ipv4/tcp_scalable.c +++ b/net/ipv4/tcp_scalable.c @@ -15,7 +15,7 @@ #define TCP_SCALABLE_AI_CNT 50U #define TCP_SCALABLE_MD_SCALE 3 -static void tcp_scalable_cong_avoid(struct sock *sk, u32 ack, u32 rtt, +static void tcp_scalable_cong_avoid(struct sock *sk, u32 ack, u32 in_flight, int flag) { struct tcp_sock *tp = tcp_sk(sk); diff --git a/net/ipv4/tcp_vegas.c b/net/ipv4/tcp_vegas.c index e218a51cec..914e0307f7 100644 --- a/net/ipv4/tcp_vegas.c +++ b/net/ipv4/tcp_vegas.c @@ -163,13 +163,13 @@ void tcp_vegas_cwnd_event(struct sock *sk, enum tcp_ca_event event) EXPORT_SYMBOL_GPL(tcp_vegas_cwnd_event); static void tcp_vegas_cong_avoid(struct sock *sk, u32 ack, - u32 seq_rtt, u32 in_flight, int flag) + u32 in_flight, int flag) { struct tcp_sock *tp = tcp_sk(sk); struct vegas *vegas = inet_csk_ca(sk); if (!vegas->doing_vegas_now) - return tcp_reno_cong_avoid(sk, ack, seq_rtt, in_flight, flag); + return tcp_reno_cong_avoid(sk, ack, in_flight, flag); /* The key players are v_beg_snd_una and v_beg_snd_nxt. * @@ -228,7 +228,7 @@ static void tcp_vegas_cong_avoid(struct sock *sk, u32 ack, /* We don't have enough RTT samples to do the Vegas * calculation, so we'll behave like Reno. */ - tcp_reno_cong_avoid(sk, ack, seq_rtt, in_flight, flag); + tcp_reno_cong_avoid(sk, ack, in_flight, flag); } else { u32 rtt, target_cwnd, diff; diff --git a/net/ipv4/tcp_veno.c b/net/ipv4/tcp_veno.c index ec854cc5fa..7a55ddf860 100644 --- a/net/ipv4/tcp_veno.c +++ b/net/ipv4/tcp_veno.c @@ -115,13 +115,13 @@ static void tcp_veno_cwnd_event(struct sock *sk, enum tcp_ca_event event) } static void tcp_veno_cong_avoid(struct sock *sk, u32 ack, - u32 seq_rtt, u32 in_flight, int flag) + u32 in_flight, int flag) { struct tcp_sock *tp = tcp_sk(sk); struct veno *veno = inet_csk_ca(sk); if (!veno->doing_veno_now) - return tcp_reno_cong_avoid(sk, ack, seq_rtt, in_flight, flag); + return tcp_reno_cong_avoid(sk, ack, in_flight, flag); /* limited by applications */ if (!tcp_is_cwnd_limited(sk, in_flight)) @@ -132,7 +132,7 @@ static void tcp_veno_cong_avoid(struct sock *sk, u32 ack, /* We don't have enough rtt samples to do the Veno * calculation, so we'll behave like Reno. */ - tcp_reno_cong_avoid(sk, ack, seq_rtt, in_flight, flag); + tcp_reno_cong_avoid(sk, ack, in_flight, flag); } else { u32 rtt, target_cwnd; diff --git a/net/ipv4/tcp_yeah.c b/net/ipv4/tcp_yeah.c index 545ed237ab..c04b7c6ec7 100644 --- a/net/ipv4/tcp_yeah.c +++ b/net/ipv4/tcp_yeah.c @@ -70,7 +70,7 @@ static void tcp_yeah_pkts_acked(struct sock *sk, u32 pkts_acked, ktime_t last) } static void tcp_yeah_cong_avoid(struct sock *sk, u32 ack, - u32 seq_rtt, u32 in_flight, int flag) + u32 in_flight, int flag) { struct tcp_sock *tp = tcp_sk(sk); struct yeah *yeah = inet_csk_ca(sk); -- 2.39.5