mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-22 11:38:14 +07:00
41 lines
1.0 KiB
C
41 lines
1.0 KiB
C
|
#ifndef _TCP_DCTCP_H
|
||
|
|
#define _TCP_DCTCP_H
|
||
|
|
|
||
|
|
static inline void dctcp_ece_ack_cwr(struct sock *sk, u32 ce_state)
|
||
|
|
{
|
||
|
|
struct tcp_sock *tp = tcp_sk(sk);
|
||
|
|
|
||
|
|
if (ce_state == 1)
|
||
|
|
tp->ecn_flags |= TCP_ECN_DEMAND_CWR;
|
||
|
|
else
|
||
|
|
tp->ecn_flags &= ~TCP_ECN_DEMAND_CWR;
|
||
|
|
}
|
||
|
|
|
||
|
|
/* Minimal DCTP CE state machine:
|
||
|
|
*
|
||
|
|
* S: 0 <- last pkt was non-CE
|
||
|
|
* 1 <- last pkt was CE
|
||
|
|
*/
|
||
|
|
static inline void dctcp_ece_ack_update(struct sock *sk, enum tcp_ca_event evt,
|
||
|
|
u32 *prior_rcv_nxt, u32 *ce_state)
|
||
|
|
{
|
||
|
|
u32 new_ce_state = (evt == CA_EVENT_ECN_IS_CE) ? 1 : 0;
|
||
|
|
|
||
|
|
if (*ce_state != new_ce_state) {
|
||
|
|
/* CE state has changed, force an immediate ACK to
|
||
|
|
* reflect the new CE state. If an ACK was delayed,
|
||
|
|
* send that first to reflect the prior CE state.
|
||
|
|
*/
|
||
|
|
if (inet_csk(sk)->icsk_ack.pending & ICSK_ACK_TIMER) {
|
||
|
|
dctcp_ece_ack_cwr(sk, *ce_state);
|
||
|
|
__tcp_send_ack(sk, *prior_rcv_nxt);
|
||
|
|
}
|
||
|
|
inet_csk(sk)->icsk_ack.pending |= ICSK_ACK_NOW;
|
||
|
|
}
|
||
|
|
*prior_rcv_nxt = tcp_sk(sk)->rcv_nxt;
|
||
|
|
*ce_state = new_ce_state;
|
||
|
|
dctcp_ece_ack_cwr(sk, new_ce_state);
|
||
|
|
}
|
||
|
|
|
||
|
|
#endif
|