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Differential D23364 Diff 72092 head/sys/netinet/tcp_stacks/rack.c

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head/sys/netinet/tcp_stacks/rack.c

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Show First 20 Lines • Show All 4,089 Lines • ▼ Show 20 Lines if (!IN_FASTRECOVERY(tp->t_flags)) {
} }
rack->r_ctl.rc_prr_recovery_fs = tp->snd_max - tp->snd_una; rack->r_ctl.rc_prr_recovery_fs = tp->snd_max - tp->snd_una;
tp->snd_recover = tp->snd_max; tp->snd_recover = tp->snd_max;
if (tp->t_flags2 & TF2_ECN_PERMIT) if (tp->t_flags2 & TF2_ECN_PERMIT)
tp->t_flags2 |= TF2_ECN_SND_CWR; tp->t_flags2 |= TF2_ECN_SND_CWR;
} }
break; break;
case CC_ECN: case CC_ECN:
if (!IN_CONGRECOVERY(tp->t_flags)) { if (!IN_CONGRECOVERY(tp->t_flags) ||
/*
* Allow ECN reaction on ACK to CWR, if
* that data segment was also CE marked.
*/
SEQ_GEQ(th->th_ack, tp->snd_recover)) {
EXIT_CONGRECOVERY(tp->t_flags);
KMOD_TCPSTAT_INC(tcps_ecn_rcwnd); KMOD_TCPSTAT_INC(tcps_ecn_rcwnd);
tp->snd_recover = tp->snd_max; tp->snd_recover = tp->snd_max + 1;
if (tp->t_flags2 & TF2_ECN_PERMIT) if (tp->t_flags2 & TF2_ECN_PERMIT)
tp->t_flags2 |= TF2_ECN_SND_CWR; tp->t_flags2 |= TF2_ECN_SND_CWR;
} }
break; break;
case CC_RTO: case CC_RTO:
tp->t_dupacks = 0; tp->t_dupacks = 0;
tp->t_bytes_acked = 0; tp->t_bytes_acked = 0;
EXIT_RECOVERY(tp->t_flags); EXIT_RECOVERY(tp->t_flags);
▲ Show 20 Lines • Show All 9,442 Lines • ▼ Show 20 Lines if (len > 0 && SEQ_GEQ(tp->snd_nxt, tp->snd_max) &&
(sack_rxmit == 0)) { (sack_rxmit == 0)) {
#ifdef INET6 #ifdef INET6
if (isipv6) if (isipv6)
ip6->ip6_flow |= htonl(IPTOS_ECN_ECT0 << 20); ip6->ip6_flow |= htonl(IPTOS_ECN_ECT0 << 20);
else else
#endif #endif
ip->ip_tos |= IPTOS_ECN_ECT0; ip->ip_tos |= IPTOS_ECN_ECT0;
KMOD_TCPSTAT_INC(tcps_ecn_ect0); KMOD_TCPSTAT_INC(tcps_ecn_ect0);
}
/* /*
* Reply with proper ECN notifications. * Reply with proper ECN notifications.
* Only set CWR on new data segments.
*/ */
if (tp->t_flags2 & TF2_ECN_SND_CWR) { if (tp->t_flags2 & TF2_ECN_SND_CWR) {
flags |= TH_CWR; flags |= TH_CWR;
tp->t_flags2 &= ~TF2_ECN_SND_CWR; tp->t_flags2 &= ~TF2_ECN_SND_CWR;
}
} }
if (tp->t_flags2 & TF2_ECN_SND_ECE) if (tp->t_flags2 & TF2_ECN_SND_ECE)
flags |= TH_ECE; flags |= TH_ECE;
} }
/* /*
* If we are doing retransmissions, then snd_nxt will not reflect * If we are doing retransmissions, then snd_nxt will not reflect
* the first unsent octet. For ACK only packets, we do not want the * the first unsent octet. For ACK only packets, we do not want the
* sequence number of the retransmitted packet, we want the sequence * sequence number of the retransmitted packet, we want the sequence
▲ Show 20 Lines • Show All 1,538 Lines • Show Last 20 Lines