From owner-svn-src-stable@freebsd.org Sat Apr 7 20:39:10 2018 Return-Path: Delivered-To: svn-src-stable@mailman.ysv.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2610:1c1:1:606c::19:1]) by mailman.ysv.freebsd.org (Postfix) with ESMTP id 7238AF83594; Sat, 7 Apr 2018 20:39:10 +0000 (UTC) (envelope-from tuexen@FreeBSD.org) Received: from mxrelay.nyi.freebsd.org (mxrelay.nyi.freebsd.org [IPv6:2610:1c1:1:606c::19:3]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (Client CN "mxrelay.nyi.freebsd.org", Issuer "Let's Encrypt Authority X3" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id 1FDAB87545; Sat, 7 Apr 2018 20:39:10 +0000 (UTC) (envelope-from tuexen@FreeBSD.org) Received: from repo.freebsd.org (repo.freebsd.org [IPv6:2610:1c1:1:6068::e6a:0]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (Client did not present a certificate) by mxrelay.nyi.freebsd.org (Postfix) with ESMTPS id F3D7725B9B; Sat, 7 Apr 2018 20:39:09 +0000 (UTC) (envelope-from tuexen@FreeBSD.org) Received: from repo.freebsd.org ([127.0.1.37]) by repo.freebsd.org (8.15.2/8.15.2) with ESMTP id w37Kd99T094021; Sat, 7 Apr 2018 20:39:09 GMT (envelope-from tuexen@FreeBSD.org) Received: (from tuexen@localhost) by repo.freebsd.org (8.15.2/8.15.2/Submit) id w37Kd9pv094020; Sat, 7 Apr 2018 20:39:09 GMT (envelope-from tuexen@FreeBSD.org) Message-Id: <201804072039.w37Kd9pv094020@repo.freebsd.org> X-Authentication-Warning: repo.freebsd.org: tuexen set sender to tuexen@FreeBSD.org using -f From: Michael Tuexen Date: Sat, 7 Apr 2018 20:39:09 +0000 (UTC) To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-stable@freebsd.org, svn-src-stable-11@freebsd.org Subject: svn commit: r332234 - stable/11/sys/netinet X-SVN-Group: stable-11 X-SVN-Commit-Author: tuexen X-SVN-Commit-Paths: stable/11/sys/netinet X-SVN-Commit-Revision: 332234 X-SVN-Commit-Repository: base MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit X-BeenThere: svn-src-stable@freebsd.org X-Mailman-Version: 2.1.25 Precedence: list List-Id: SVN commit messages for all the -stable branches of the src tree List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sat, 07 Apr 2018 20:39:10 -0000 Author: tuexen Date: Sat Apr 7 20:39:09 2018 New Revision: 332234 URL: https://svnweb.freebsd.org/changeset/base/332234 Log: MFC r328066: Fix a bug related to fast retransmissions. When processing a SACK advancing the cumtsn-ack in fast recovery, increment the miss-indications for all TSN's reported as missing. Thanks to Fabian Ising for finding the bug and to Timo Voelker for provinding a fix. This fix moves also CMT related initialisation of some variables to a more appropriate place. Modified: stable/11/sys/netinet/sctp_indata.c Directory Properties: stable/11/ (props changed) Modified: stable/11/sys/netinet/sctp_indata.c ============================================================================== --- stable/11/sys/netinet/sctp_indata.c Sat Apr 7 20:38:01 2018 (r332233) +++ stable/11/sys/netinet/sctp_indata.c Sat Apr 7 20:39:09 2018 (r332234) @@ -3362,7 +3362,8 @@ sctp_strike_gap_ack_chunks(struct sctp_tcb *stcb, stru } } } - if (SCTP_TSN_GT(tp1->rec.data.tsn, asoc->this_sack_highest_gap)) { + if (SCTP_TSN_GT(tp1->rec.data.tsn, asoc->this_sack_highest_gap) && + !(accum_moved && asoc->fast_retran_loss_recovery)) { /* we are beyond the tsn in the sack */ break; } @@ -3386,8 +3387,10 @@ sctp_strike_gap_ack_chunks(struct sctp_tcb *stcb, stru * FR using this SACK. */ continue; - } else if (tp1->whoTo && SCTP_TSN_GT(tp1->rec.data.tsn, - tp1->whoTo->this_sack_highest_newack)) { + } else if (tp1->whoTo && + SCTP_TSN_GT(tp1->rec.data.tsn, + tp1->whoTo->this_sack_highest_newack) && + !(accum_moved && asoc->fast_retran_loss_recovery)) { /* * CMT: New acks were receieved for data sent to * this dest. But no new acks were seen for data @@ -3672,7 +3675,7 @@ sctp_strike_gap_ack_chunks(struct sctp_tcb *stcb, stru tp1->whoTo->find_pseudo_cumack = 1; tp1->whoTo->find_rtx_pseudo_cumack = 1; } - } else {/* CMT is OFF */ + } else { /* CMT is OFF */ #ifdef SCTP_FR_TO_ALTERNATE /* Can we find an alternate? */ @@ -4601,6 +4604,13 @@ hopeless_peer: if (stcb->asoc.cc_functions.sctp_cwnd_prepare_net_for_sack) { (*stcb->asoc.cc_functions.sctp_cwnd_prepare_net_for_sack) (stcb, net); } + /* + * CMT: SFR algo (and HTNA) - this_sack_highest_newack has + * to be greater than the cumack. Also reset saw_newack to 0 + * for all dests. + */ + net->saw_newack = 0; + net->this_sack_highest_newack = last_tsn; } /* process the new consecutive TSN first */ TAILQ_FOREACH(tp1, &asoc->sent_queue, sctp_next) { @@ -4726,16 +4736,6 @@ hopeless_peer: asoc->this_sack_highest_gap = last_tsn; if ((num_seg > 0) || (num_nr_seg > 0)) { - - /* - * CMT: SFR algo (and HTNA) - this_sack_highest_newack has - * to be greater than the cumack. Also reset saw_newack to 0 - * for all dests. - */ - TAILQ_FOREACH(net, &asoc->nets, sctp_next) { - net->saw_newack = 0; - net->this_sack_highest_newack = last_tsn; - } /* * thisSackHighestGap will increase while handling NEW