Author: np
Date: Wed Oct 17 01:49:43 2018
New Revision: 339401
URL: https://svnweb.freebsd.org/changeset/base/339401
Log:
MFC r320426:
cxgbe/t4_tom: Do not include space taken by the TCP timestamp option in
the "effective MSS" for the connection. The chip expects it this way.
Modified:
stable/11/sys/dev/cxgbe/tom/t4_cpl_io.c
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 Wed Oct 17 01:30:51 2018
(r339400)
+++ stable/11/sys/dev/cxgbe/tom/t4_cpl_io.c Wed Oct 17 01:49:43 2018
(r339401)
@@ -260,6 +260,8 @@ assign_rxopt(struct tcpcb *tp, unsigned int opt)
n = sizeof(struct ip6_hdr) + sizeof(struct tcphdr);
else
n = sizeof(struct ip) + sizeof(struct tcphdr);
+ if (V_tcp_do_rfc1323)
+ n += TCPOLEN_TSTAMP_APPA;
tp->t_maxseg = sc->params.mtus[G_TCPOPT_MSS(opt)] - n;
CTR4(KTR_CXGBE, "%s: tid %d, mtu_idx %u (%u)", __func__, toep->tid,
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