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[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 <shemminger@linux-foundation.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Stephen Hemminger 2007-07-16 18:35:52 -07:00 committed by David S. Miller
parent 44beac0086
commit 16751347a0
14 changed files with 24 additions and 28 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

6
include/net/tcp.h
View File

@ -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;

2
net/ipv4/tcp_bic.c
View File

@ -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);

3
net/ipv4/tcp_cong.c
View File

@ -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);

2
net/ipv4/tcp_cubic.c
View File

@ -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);

2
net/ipv4/tcp_highspeed.c
View File

@ -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);

2
net/ipv4/tcp_htcp.c
View File

@ -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);

4
net/ipv4/tcp_hybla.c
View File

@ -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);

2
net/ipv4/tcp_illinois.c
View File

@ -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);

8
net/ipv4/tcp_input.c
View File

@ -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))

5
net/ipv4/tcp_lp.c
View File

@ -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);
}
/**

2
net/ipv4/tcp_scalable.c
View File

@ -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);

6
net/ipv4/tcp_vegas.c
View File

@ -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;

6
net/ipv4/tcp_veno.c
View File

@ -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;

2
net/ipv4/tcp_yeah.c
View File

@ -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);