Date: Sat, 30 Nov 2019 19:33:15 +0000 (UTC) From: Navdeep Parhar <np@FreeBSD.org> To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-stable@freebsd.org, svn-src-stable-11@freebsd.org Subject: svn commit: r355242 - stable/11/sys/dev/cxgbe/tom Message-ID: <201911301933.xAUJXFdr030599@repo.freebsd.org>
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Author: np Date: Sat Nov 30 19:33:14 2019 New Revision: 355242 URL: https://svnweb.freebsd.org/changeset/base/355242 Log: MFC r349500: cxgbe/t4_tom: Fix regression in t_maxseg usage within t4_tom. t_maxseg was changed in r293284 to not have any adjustment for TCP timestamps. t4_tom inadvertently went back to pre-r293284 semantics in r332506. Sponsored by: Chelsio Communications Modified: stable/11/sys/dev/cxgbe/tom/t4_cpl_io.c stable/11/sys/dev/cxgbe/tom/t4_tom.c stable/11/sys/dev/cxgbe/tom/t4_tom.h Directory Properties: stable/11/ (props changed) Modified: stable/11/sys/dev/cxgbe/tom/t4_cpl_io.c ============================================================================== --- stable/11/sys/dev/cxgbe/tom/t4_cpl_io.c Sat Nov 30 19:33:02 2019 (r355241) +++ stable/11/sys/dev/cxgbe/tom/t4_cpl_io.c Sat Nov 30 19:33:14 2019 (r355242) @@ -337,31 +337,33 @@ send_reset(struct adapter *sc, struct toepcb *toep, ui * reported by HW to FreeBSD's native format. */ static void -assign_rxopt(struct tcpcb *tp, unsigned int opt) +assign_rxopt(struct tcpcb *tp, uint16_t opt) { struct toepcb *toep = tp->t_toe; struct inpcb *inp = tp->t_inpcb; struct adapter *sc = td_adapter(toep->td); - int n; INP_LOCK_ASSERT(inp); + toep->tcp_opt = opt; + toep->mtu_idx = G_TCPOPT_MSS(opt); + tp->t_maxseg = sc->params.mtus[toep->mtu_idx]; if (inp->inp_inc.inc_flags & INC_ISIPV6) - n = sizeof(struct ip6_hdr) + sizeof(struct tcphdr); + tp->t_maxseg -= sizeof(struct ip6_hdr) + sizeof(struct tcphdr); else - n = sizeof(struct ip) + sizeof(struct tcphdr); - tp->t_maxseg = sc->params.mtus[G_TCPOPT_MSS(opt)] - n; + tp->t_maxseg -= sizeof(struct ip) + sizeof(struct tcphdr); + toep->emss = tp->t_maxseg; if (G_TCPOPT_TSTAMP(opt)) { tp->t_flags |= TF_RCVD_TSTMP; /* timestamps ok */ tp->ts_recent = 0; /* hmmm */ tp->ts_recent_age = tcp_ts_getticks(); - tp->t_maxseg -= TCPOLEN_TSTAMP_APPA; + toep->emss -= TCPOLEN_TSTAMP_APPA; } - CTR5(KTR_CXGBE, "%s: tid %d, mtu_idx %u (%u), mss %u", __func__, - toep->tid, G_TCPOPT_MSS(opt), sc->params.mtus[G_TCPOPT_MSS(opt)], - tp->t_maxseg); + CTR6(KTR_CXGBE, "%s: tid %d, mtu_idx %u (%u), t_maxseg %u, emss %u", + __func__, toep->tid, toep->mtu_idx, + sc->params.mtus[G_TCPOPT_MSS(opt)], tp->t_maxseg, toep->emss); if (G_TCPOPT_SACK(opt)) tp->t_flags |= TF_SACK_PERMIT; /* should already be set */ @@ -409,7 +411,7 @@ make_established(struct toepcb *toep, uint32_t iss, ui tp->irs = irs; tcp_rcvseqinit(tp); - tp->rcv_wnd = toep->opt0_rcv_bufsize << 10; + tp->rcv_wnd = (u_int)toep->opt0_rcv_bufsize << 10; tp->rcv_adv += tp->rcv_wnd; tp->last_ack_sent = tp->rcv_nxt; @@ -431,7 +433,7 @@ make_established(struct toepcb *toep, uint32_t iss, ui ftxp.snd_nxt = tp->snd_nxt; ftxp.rcv_nxt = tp->rcv_nxt; ftxp.snd_space = bufsize; - ftxp.mss = tp->t_maxseg; + ftxp.mss = toep->emss; send_flowc_wr(toep, &ftxp); soisconnected(so); @@ -623,7 +625,7 @@ write_tx_wr(void *dst, struct toepcb *toep, unsigned i if (txalign > 0) { struct tcpcb *tp = intotcpcb(toep->inp); - if (plen < 2 * tp->t_maxseg) + if (plen < 2 * toep->emss) txwr->lsodisable_to_flags |= htobe32(F_FW_OFLD_TX_DATA_WR_LSODISABLE); else Modified: stable/11/sys/dev/cxgbe/tom/t4_tom.c ============================================================================== --- stable/11/sys/dev/cxgbe/tom/t4_tom.c Sat Nov 30 19:33:02 2019 (r355241) +++ stable/11/sys/dev/cxgbe/tom/t4_tom.c Sat Nov 30 19:33:14 2019 (r355242) @@ -532,8 +532,7 @@ remove_tid(struct adapter *sc, int tid, int ntids) * What mtu_idx to use, given a 4-tuple. Note that both s->mss and tcp_mssopt * have the MSS that we should advertise in our SYN. Advertised MSS doesn't * account for any TCP options so the effective MSS (only payload, no headers or - * options) could be different. We fill up tp->t_maxseg with the effective MSS - * at the end of the 3-way handshake. + * options) could be different. */ int find_best_mtu_idx(struct adapter *sc, struct in_conninfo *inc, Modified: stable/11/sys/dev/cxgbe/tom/t4_tom.h ============================================================================== --- stable/11/sys/dev/cxgbe/tom/t4_tom.h Sat Nov 30 19:33:02 2019 (r355241) +++ stable/11/sys/dev/cxgbe/tom/t4_tom.h Sat Nov 30 19:33:14 2019 (r355242) @@ -178,7 +178,10 @@ struct toepcb { u_int tx_nocompl; /* tx WR credits since last compl request */ u_int plen_nocompl; /* payload since last compl request */ - int opt0_rcv_bufsize; /* XXX: save full opt0/opt2 for later? */ + uint16_t opt0_rcv_bufsize; /* XXX: save full opt0/opt2 for later? */ + uint16_t mtu_idx; + uint16_t emss; + uint16_t tcp_opt; u_int ulp_mode; /* ULP mode */ void *ulpcb;
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