xref: /linux/net/ipv4/tcp_vegas.h (revision 498495dba268b20e8eadd7fe93c140c68b6cc9d2)
1 /* SPDX-License-Identifier: GPL-2.0 */
2 /*
3  * TCP Vegas congestion control interface
4  */
5 #ifndef __TCP_VEGAS_H
6 #define __TCP_VEGAS_H 1
7 
8 /* Vegas variables */
9 struct vegas {
10 	u32	beg_snd_nxt;	/* right edge during last RTT */
11 	u32	beg_snd_una;	/* left edge  during last RTT */
12 	u32	beg_snd_cwnd;	/* saves the size of the cwnd */
13 	u8	doing_vegas_now;/* if true, do vegas for this RTT */
14 	u16	cntRTT;		/* # of RTTs measured within last RTT */
15 	u32	minRTT;		/* min of RTTs measured within last RTT (in usec) */
16 	u32	baseRTT;	/* the min of all Vegas RTT measurements seen (in usec) */
17 };
18 
19 void tcp_vegas_init(struct sock *sk);
20 void tcp_vegas_state(struct sock *sk, u8 ca_state);
21 void tcp_vegas_pkts_acked(struct sock *sk, const struct ack_sample *sample);
22 void tcp_vegas_cwnd_event(struct sock *sk, enum tcp_ca_event event);
23 size_t tcp_vegas_get_info(struct sock *sk, u32 ext, int *attr,
24 			  union tcp_cc_info *info);
25 
26 #endif	/* __TCP_VEGAS_H */
27