From patchwork Thu Apr 19 13:41:32 2012 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Pavel Emelyanov X-Patchwork-Id: 153762 X-Patchwork-Delegate: davem@davemloft.net Return-Path: X-Original-To: patchwork-incoming@ozlabs.org Delivered-To: patchwork-incoming@ozlabs.org Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by ozlabs.org (Postfix) with ESMTP id 4FE8DB6FE2 for ; Thu, 19 Apr 2012 23:41:42 +1000 (EST) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754366Ab2DSNlk (ORCPT ); Thu, 19 Apr 2012 09:41:40 -0400 Received: from mailhub.sw.ru ([195.214.232.25]:28464 "EHLO relay.sw.ru" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752808Ab2DSNlj (ORCPT ); Thu, 19 Apr 2012 09:41:39 -0400 Received: from [10.30.19.237] ([10.30.19.237]) (authenticated bits=0) by relay.sw.ru (8.13.4/8.13.4) with ESMTP id q3JDfY83022242 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=NO); Thu, 19 Apr 2012 17:41:35 +0400 (MSK) Message-ID: <4F90160C.1070605@parallels.com> Date: Thu, 19 Apr 2012 17:41:32 +0400 From: Pavel Emelyanov User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:10.0.1) Gecko/20120209 Thunderbird/10.0.1 MIME-Version: 1.0 To: Linux Netdev List , David Miller Subject: [PATCH 5/6] tcp: Report mss_clamp with TCP_MAXSEG option in repair mode References: <4F901572.4040009@parallels.com> In-Reply-To: <4F901572.4040009@parallels.com> Sender: netdev-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org The mss_clamp is the only connection-time negotiated option which cannot be obtained from the user space. Make the TCP_MAXSEG sockopt report one in the repair mode. Signed-off-by: Pavel Emelyanov --- net/ipv4/tcp.c | 2 ++ 1 files changed, 2 insertions(+), 0 deletions(-) diff --git a/net/ipv4/tcp.c b/net/ipv4/tcp.c index 47e2f49..b4e690d 100644 --- a/net/ipv4/tcp.c +++ b/net/ipv4/tcp.c @@ -2659,6 +2659,8 @@ static int do_tcp_getsockopt(struct sock *sk, int level, val = tp->mss_cache; if (!val && ((1 << sk->sk_state) & (TCPF_CLOSE | TCPF_LISTEN))) val = tp->rx_opt.user_mss; + if (tp->repair) + val = tp->rx_opt.mss_clamp; break; case TCP_NODELAY: val = !!(tp->nonagle&TCP_NAGLE_OFF);