From owner-freebsd-net@FreeBSD.ORG  Fri Mar 18 09:30:21 2011
Return-Path: <owner-freebsd-net@FreeBSD.ORG>
Delivered-To: freebsd-net@hub.freebsd.org
Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34])
	by hub.freebsd.org (Postfix) with ESMTP id 6166F106566C
	for <freebsd-net@hub.freebsd.org>; Fri, 18 Mar 2011 09:30:21 +0000 (UTC)
	(envelope-from gnats@FreeBSD.org)
Received: from freefall.freebsd.org (freefall.freebsd.org
	[IPv6:2001:4f8:fff6::28])
	by mx1.freebsd.org (Postfix) with ESMTP id 367498FC15
	for <freebsd-net@hub.freebsd.org>; Fri, 18 Mar 2011 09:30:21 +0000 (UTC)
Received: from freefall.freebsd.org (localhost [127.0.0.1])
	by freefall.freebsd.org (8.14.4/8.14.4) with ESMTP id p2I9UKsf024029
	for <freebsd-net@freefall.freebsd.org>; Fri, 18 Mar 2011 09:30:20 GMT
	(envelope-from gnats@freefall.freebsd.org)
Received: (from gnats@localhost)
	by freefall.freebsd.org (8.14.4/8.14.4/Submit) id p2I9UKtq024021;
	Fri, 18 Mar 2011 09:30:20 GMT (envelope-from gnats)
Date: Fri, 18 Mar 2011 09:30:20 GMT
Message-Id: <201103180930.p2I9UKtq024021@freefall.freebsd.org>
To: freebsd-net@FreeBSD.org
From: Andrey Smagin <sam@dipinteractive.com>
Cc: 
Subject: Re: kern/155585: [tcp] [panic] tcp_output tcp_mtudisc loop until
 kernel panic
X-BeenThere: freebsd-net@freebsd.org
X-Mailman-Version: 2.1.5
Precedence: list
Reply-To: Andrey Smagin <sam@dipinteractive.com>
List-Id: Networking and TCP/IP with FreeBSD <freebsd-net.freebsd.org>
List-Unsubscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-net>,
	<mailto:freebsd-net-request@freebsd.org?subject=unsubscribe>
List-Archive: <http://lists.freebsd.org/pipermail/freebsd-net>
List-Post: <mailto:freebsd-net@freebsd.org>
List-Help: <mailto:freebsd-net-request@freebsd.org?subject=help>
List-Subscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-net>,
	<mailto:freebsd-net-request@freebsd.org?subject=subscribe>
X-List-Received-Date: Fri, 18 Mar 2011 09:30:21 -0000

The following reply was made to PR kern/155585; it has been noted by GNATS.

From: Andrey Smagin <sam@dipinteractive.com>
To: bug-followup@FreeBSD.org, samspeed@mail.ru
Cc:  
Subject: Re: kern/155585: [tcp] [panic] tcp_output tcp_mtudisc loop until
 kernel panic
Date: Fri, 18 Mar 2011 12:08:24 +0300

   this patch solve my problem
 Index: sys/netinet/tcp_var.h
 ===================================================================
 --- sys/netinet/tcp_var.h       (revision 219727)
 +++ sys/netinet/tcp_var.h       (working copy)
 @@ -239,6 +239,7 @@
   #define        TF_ECN_SND_ECE  0x10000000      /* ECN ECE in queue */
   #define        TF_CONGRECOVERY 0x20000000      /* congestion recovery 
 mode */
   #define        TF_WASCRECOVERY 0x40000000      /* was in congestion 
 recovery */
 +#define        TF_WASMTUDISC   0x80000000      /* was in mtudiscovery */
 
   #define        IN_FASTRECOVERY(t_flags)        (t_flags & TF_FASTRECOVERY)
   #define        ENTER_FASTRECOVERY(t_flags)     t_flags |= TF_FASTRECOVERY
 Index: sys/netinet/tcp_output.c
 ===================================================================
 --- sys/netinet/tcp_output.c    (revision 219727)
 +++ sys/netinet/tcp_output.c    (working copy)
 @@ -1288,8 +1288,15 @@
                           */
                          if (tso)
                                  tp->t_flags &= ~TF_TSO;
 +
 +                       if ( tp->t_flags & TF_WASMTUDISC ) // if 
 EMSGSIZE after call tcp_mtudisc then return EHOSTUNREACH
 +                               return (EHOSTUNREACH);
 +
 +                       tp->t_flags |= TF_WASMTUDISC
                          tcp_mtudisc(tp->t_inpcb, 0);
 +                       tp->t_flags &= ~TF_WASMTUDISC;
                          return (0);
 +
                  case EHOSTDOWN:
                  case EHOSTUNREACH:
                  case ENETDOWN: