Date: Thu, 25 Mar 2021 22:57:04 GMT From: Richard Scheffenegger <rscheff@FreeBSD.org> To: src-committers@FreeBSD.org, dev-commits-src-all@FreeBSD.org, dev-commits-src-main@FreeBSD.org Subject: git: 0533fab89e37 - main - tcp: Perform simple fast retransmit when SACK Blocks are missing on SACK session Message-ID: <202103252257.12PMv4VL031707@gitrepo.freebsd.org>
next in thread | raw e-mail | index | archive | help
The branch main has been updated by rscheff: URL: https://cgit.FreeBSD.org/src/commit/?id=0533fab89e37caab886568df88d9f939e85eeb6c commit 0533fab89e37caab886568df88d9f939e85eeb6c Author: Richard Scheffenegger <rscheff@FreeBSD.org> AuthorDate: 2021-03-25 22:18:06 +0000 Commit: Richard Scheffenegger <rscheff@FreeBSD.org> CommitDate: 2021-03-25 22:23:48 +0000 tcp: Perform simple fast retransmit when SACK Blocks are missing on SACK session MFC after: 2 weeks Reviewed By: #transport, rrs Sponsored by: NetApp, Inc. Differential Revision: https://reviews.freebsd.org/D28634 --- sys/netinet/tcp_input.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) diff --git a/sys/netinet/tcp_input.c b/sys/netinet/tcp_input.c index bdc0e872c36e..685a5e020c3b 100644 --- a/sys/netinet/tcp_input.c +++ b/sys/netinet/tcp_input.c @@ -2564,6 +2564,7 @@ tcp_do_segment(struct mbuf *m, struct tcphdr *th, struct socket *so, */ if (th->th_ack != tp->snd_una || ((tp->t_flags & TF_SACK_PERMIT) && + (to.to_flags & TOF_SACK) && !sack_changed)) break; else if (!tcp_timer_active(tp, TT_REXMT)) @@ -2617,6 +2618,7 @@ tcp_do_segment(struct mbuf *m, struct tcphdr *th, struct socket *so, tp->snd_cwnd = imax(maxseg, tp->snd_nxt - tp->snd_recover + tp->sackhint.sack_bytes_rexmit + (snd_cnt * maxseg)); } else if ((tp->t_flags & TF_SACK_PERMIT) && + (to.to_flags & TOF_SACK) && IN_FASTRECOVERY(tp->t_flags)) { int awnd; @@ -2694,7 +2696,8 @@ enter_recovery: tp->sackhint.recover_fs = max(1, tp->snd_nxt - tp->snd_una); } - if (tp->t_flags & TF_SACK_PERMIT) { + if ((tp->t_flags & TF_SACK_PERMIT) && + (to.to_flags & TOF_SACK)) { TCPSTAT_INC( tcps_sack_recovery_episode); tp->snd_recover = tp->snd_nxt;
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?202103252257.12PMv4VL031707>