From patchwork Wed Apr 16 16:25:01 2014 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Kenjiro Nakayama X-Patchwork-Id: 339644 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 5987714008E for ; Thu, 17 Apr 2014 02:26:21 +1000 (EST) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1750986AbaDPQZM (ORCPT ); Wed, 16 Apr 2014 12:25:12 -0400 Received: from mail-pb0-f46.google.com ([209.85.160.46]:56752 "EHLO mail-pb0-f46.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750713AbaDPQZK (ORCPT ); Wed, 16 Apr 2014 12:25:10 -0400 Received: by mail-pb0-f46.google.com with SMTP id rq2so10968832pbb.5 for ; Wed, 16 Apr 2014 09:25:09 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=from:to:cc:subject:user-agent:date:message-id:mime-version :content-type; bh=m1BtqrIVbmzCeRuj1SUkMbwG610fx8CRpNunPW+UD4A=; b=FEn24PO59u7zggUahicEQzWeZLtS6L7OgY9Epn1Dt1M6buyIWs1sTUBbrHb0uu2rYM CVpjxkYjKctD1BxFo3IKqw/cRuO9n1pQaO4+pVg0boHc+oLPwCGxfGVABYLVYgo6WjLe hPKNUEH3vCHaR40I8S7nB+BU99BdSUc3T+yS0FZzQYdQy5EdJnaFR40QieAMBlBqBwO9 HQ7qYxzhvkJZB+wQ3FEnKUdGMq7Bh06zUwF1JRGnJko1DNPHmVIqolQWjtFTgYEK9bG5 KdbwXszIgR5Zn+sTkpjQsyWqBoJ14tYy4zl2OpZhAVNtuHzwEb0XovZKya9LkReQSvmW ffaw== X-Received: by 10.68.240.5 with SMTP id vw5mr9410680pbc.113.1397665509603; Wed, 16 Apr 2014 09:25:09 -0700 (PDT) Received: from localhost.localdomain (nat-pool-nrt-t1.redhat.com. [66.187.238.10]) by mx.google.com with ESMTPSA id iv2sm47970878pbc.19.2014.04.16.09.25.06 for (version=TLSv1.2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Wed, 16 Apr 2014 09:25:08 -0700 (PDT) From: Kenjiro Nakayama To: LKML Cc: Neal Cardwell , Netdev , Yuchung Cheng , Eric Dumazet Subject: [PATCH v3] tcp: Add a TCP_FASTOPEN socket option to get a max backlog on its listner User-agent: mu4e 0.9.9.5; emacs 24.3.1 Date: Thu, 17 Apr 2014 01:25:01 +0900 Message-ID: <87a9bljl7m.fsf@gmail.com> MIME-Version: 1.0 Sender: netdev-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org This patch adds a TCP_FASTOPEN socket option to get a max backlog on its listener to getsockopt(). Signed-off-by: Kenjiro Nakayama Acked-by: Neal Cardwell --- net/ipv4/tcp.c | 8 ++++++++ 1 file changed, 8 insertions(+) -- 1.9.0 -- To unsubscribe from this list: send the line "unsubscribe netdev" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html diff --git a/net/ipv4/tcp.c b/net/ipv4/tcp.c index 4bd6d52..eb1dde3 100644 --- a/net/ipv4/tcp.c +++ b/net/ipv4/tcp.c @@ -2916,6 +2916,14 @@ static int do_tcp_getsockopt(struct sock *sk, int level, case TCP_USER_TIMEOUT: val = jiffies_to_msecs(icsk->icsk_user_timeout); break; + + case TCP_FASTOPEN: + if (icsk->icsk_accept_queue.fastopenq != NULL) + val = icsk->icsk_accept_queue.fastopenq->max_qlen; + else + val = 0; + break; + case TCP_TIMESTAMP: val = tcp_time_stamp + tp->tsoffset; break;