1b2441318SGreg Kroah-Hartman /* SPDX-License-Identifier: GPL-2.0 */ 27752237eSStephen Hemminger /* 37752237eSStephen Hemminger * TCP Vegas congestion control interface 47752237eSStephen Hemminger */ 57752237eSStephen Hemminger #ifndef __TCP_VEGAS_H 67752237eSStephen Hemminger #define __TCP_VEGAS_H 1 77752237eSStephen Hemminger 87752237eSStephen Hemminger /* Vegas variables */ 97752237eSStephen Hemminger struct vegas { 107752237eSStephen Hemminger u32 beg_snd_nxt; /* right edge during last RTT */ 117752237eSStephen Hemminger u32 beg_snd_una; /* left edge during last RTT */ 127752237eSStephen Hemminger u32 beg_snd_cwnd; /* saves the size of the cwnd */ 137752237eSStephen Hemminger u8 doing_vegas_now;/* if true, do vegas for this RTT */ 147752237eSStephen Hemminger u16 cntRTT; /* # of RTTs measured within last RTT */ 157752237eSStephen Hemminger u32 minRTT; /* min of RTTs measured within last RTT (in usec) */ 167752237eSStephen Hemminger u32 baseRTT; /* the min of all Vegas RTT measurements seen (in usec) */ 177752237eSStephen Hemminger }; 187752237eSStephen Hemminger 197e58487bSJoe Perches void tcp_vegas_init(struct sock *sk); 207e58487bSJoe Perches void tcp_vegas_state(struct sock *sk, u8 ca_state); 21756ee172SLawrence Brakmo void tcp_vegas_pkts_acked(struct sock *sk, const struct ack_sample *sample); 227e58487bSJoe Perches void tcp_vegas_cwnd_event(struct sock *sk, enum tcp_ca_event event); 2364f40ff5SEric Dumazet size_t tcp_vegas_get_info(struct sock *sk, u32 ext, int *attr, 2464f40ff5SEric Dumazet union tcp_cc_info *info); 257752237eSStephen Hemminger 267752237eSStephen Hemminger #endif /* __TCP_VEGAS_H */ 27