Author: tuexen Date: Tue Dec 4 22:05:36 2018 New Revision: 341497 URL: https://svnweb.freebsd.org/changeset/base/341497
Log: MFC r340738: Improve two KASSERTs in the TCP RACK stack. There are two locations where an always true comparison was made in a KASSERT. Replace this by an appropriate check and use a consistent panic message. Also use this code when checking a similar condition. PR: 229664 Reviewed by: rrs@ MFC after: 1 week Sponsored by: Netflix, Inc. Differential Revision: https://reviews.freebsd.org/D18021 Modified: stable/12/sys/netinet/tcp_stacks/rack.c Directory Properties: stable/12/ (props changed) Modified: stable/12/sys/netinet/tcp_stacks/rack.c ============================================================================== --- stable/12/sys/netinet/tcp_stacks/rack.c Tue Dec 4 21:57:26 2018 (r341496) +++ stable/12/sys/netinet/tcp_stacks/rack.c Tue Dec 4 22:05:36 2018 (r341497) @@ -7053,12 +7053,10 @@ again: tlen = rsm->r_end - rsm->r_start; if (tlen > tp->t_maxseg) tlen = tp->t_maxseg; -#ifdef INVARIANTS - if (SEQ_GT(tp->snd_una, rsm->r_start)) { - panic("tp:%p rack:%p snd_una:%u rsm:%p r_start:%u", - tp, rack, tp->snd_una, rsm, rsm->r_start); - } -#endif + KASSERT(SEQ_LEQ(tp->snd_una, rsm->r_start), + ("%s:%d: r.start:%u < SND.UNA:%u; tp:%p, rack:%p, rsm:%p", + __func__, __LINE__, + rsm->r_start, tp->snd_una, tp, rack, rsm)); sb_offset = rsm->r_start - tp->snd_una; cwin = min(tp->snd_wnd, tlen); len = cwin; @@ -7069,12 +7067,14 @@ again: len = rsm->r_end - rsm->r_start; sack_rxmit = 1; sendalot = 0; + KASSERT(SEQ_LEQ(tp->snd_una, rsm->r_start), + ("%s:%d: r.start:%u < SND.UNA:%u; tp:%p, rack:%p, rsm:%p", + __func__, __LINE__, + rsm->r_start, tp->snd_una, tp, rack, rsm)); sb_offset = rsm->r_start - tp->snd_una; if (len >= tp->t_maxseg) { len = tp->t_maxseg; } - KASSERT(sb_offset >= 0, ("%s: sack block to the left of una : %d", - __func__, sb_offset)); } else if ((rack->rc_in_persist == 0) && ((rsm = tcp_rack_output(tp, rack, cts)) != NULL)) { long tlen; @@ -7099,6 +7099,10 @@ again: } #endif tlen = rsm->r_end - rsm->r_start; + KASSERT(SEQ_LEQ(tp->snd_una, rsm->r_start), + ("%s:%d: r.start:%u < SND.UNA:%u; tp:%p, rack:%p, rsm:%p", + __func__, __LINE__, + rsm->r_start, tp->snd_una, tp, rack, rsm)); sb_offset = rsm->r_start - tp->snd_una; if (tlen > rack->r_ctl.rc_prr_sndcnt) { len = rack->r_ctl.rc_prr_sndcnt; @@ -7120,8 +7124,6 @@ again: goto just_return_nolock; } } - KASSERT(sb_offset >= 0, ("%s: sack block to the left of una : %d", - __func__, sb_offset)); if (len > 0) { sub_from_prr = 1; sack_rxmit = 1; _______________________________________________ [email protected] mailing list https://lists.freebsd.org/mailman/listinfo/svn-src-all To unsubscribe, send any mail to "[email protected]"
