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cxgbe/tom: fix the MSS calculation for IPv6 connections handled by the TOE.

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MFC after:	1 week
This commit is contained in:
Navdeep Parhar 2015-01-02 21:13:24 +00:00
parent af80e5148c
commit 402873f32a
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=276574
1 changed files with 12 additions and 2 deletions
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14
sys/dev/cxgbe/tom/t4_cpl_io.c
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@ -44,6 +44,7 @@ __FBSDID("$FreeBSD$");
#include <netinet/in.h>
#include <netinet/in_pcb.h>
#include <netinet/ip.h>
#include <netinet/ip6.h>
#include <netinet/tcp_var.h>
#define TCPSTATES
#include <netinet/tcp_fsm.h>
@ -236,11 +237,20 @@ static void
assign_rxopt(struct tcpcb *tp, unsigned int 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(tp->t_inpcb);
INP_LOCK_ASSERT(inp);
tp->t_maxseg = tp->t_maxopd = sc->params.mtus[G_TCPOPT_MSS(opt)] - 40;
if (inp->inp_inc.inc_flags & INC_ISIPV6)
n = sizeof(struct ip6_hdr) + sizeof(struct tcphdr);
else
n = sizeof(struct ip) + sizeof(struct tcphdr);
tp->t_maxseg = tp->t_maxopd = sc->params.mtus[G_TCPOPT_MSS(opt)] - n;
CTR4(KTR_CXGBE, "%s: tid %d, mtu_idx %u (%u)", __func__, toep->tid,
G_TCPOPT_MSS(opt), sc->params.mtus[G_TCPOPT_MSS(opt)]);
if (G_TCPOPT_TSTAMP(opt)) {
tp->t_flags |= TF_RCVD_TSTMP; /* timestamps ok */