From patchwork Thu Jul 13 05:52:53 2017 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Zhang Chen X-Patchwork-Id: 9837731 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork.web.codeaurora.org (Postfix) with ESMTP id 10CBE60392 for ; Thu, 13 Jul 2017 05:54:37 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id F25C1286C7 for ; Thu, 13 Jul 2017 05:54:36 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id E6AFF286D4; Thu, 13 Jul 2017 05:54:36 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-6.9 required=2.0 tests=BAYES_00,RCVD_IN_DNSWL_HI autolearn=ham version=3.3.1 Received: from lists.gnu.org (lists.gnu.org [208.118.235.17]) (using TLSv1 with cipher AES256-SHA (256/256 bits)) (No client certificate requested) by mail.wl.linuxfoundation.org (Postfix) with ESMTPS id 9235E286C7 for ; Thu, 13 Jul 2017 05:54:36 +0000 (UTC) Received: from localhost ([::1]:57297 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1dVX59-0007R5-Mt for patchwork-qemu-devel@patchwork.kernel.org; Thu, 13 Jul 2017 01:54:35 -0400 Received: from eggs.gnu.org ([2001:4830:134:3::10]:36108) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1dVX3v-0007O6-FF for qemu-devel@nongnu.org; Thu, 13 Jul 2017 01:53:20 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1dVX3s-0006G0-CU for qemu-devel@nongnu.org; Thu, 13 Jul 2017 01:53:19 -0400 Received: from [59.151.112.132] (port=25092 helo=heian.cn.fujitsu.com) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1dVX3r-0006C3-Vt for qemu-devel@nongnu.org; Thu, 13 Jul 2017 01:53:16 -0400 X-IronPort-AV: E=Sophos;i="5.22,518,1449504000"; d="scan'208";a="21231269" Received: from unknown (HELO cn.fujitsu.com) ([10.167.33.5]) by heian.cn.fujitsu.com with ESMTP; 13 Jul 2017 13:53:04 +0800 Received: from G08CNEXCHPEKD02.g08.fujitsu.local (unknown [10.167.33.83]) by cn.fujitsu.com (Postfix) with ESMTP id D70BE46B5246; Thu, 13 Jul 2017 13:53:03 +0800 (CST) Received: from localhost.localdomain (10.167.226.56) by G08CNEXCHPEKD02.g08.fujitsu.local (10.167.33.89) with Microsoft SMTP Server (TLS) id 14.3.319.2; Thu, 13 Jul 2017 13:53:01 +0800 From: Zhang Chen To: qemu devel , Jason Wang Date: Thu, 13 Jul 2017 13:52:53 +0800 Message-ID: <1499925175-21218-3-git-send-email-zhangchen.fnst@cn.fujitsu.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1499925175-21218-1-git-send-email-zhangchen.fnst@cn.fujitsu.com> References: <1499925175-21218-1-git-send-email-zhangchen.fnst@cn.fujitsu.com> MIME-Version: 1.0 X-Originating-IP: [10.167.226.56] X-yoursite-MailScanner-ID: D70BE46B5246.ACF88 X-yoursite-MailScanner: Found to be clean X-yoursite-MailScanner-From: zhangchen.fnst@cn.fujitsu.com X-detected-operating-system: by eggs.gnu.org: Genre and OS details not recognized. X-Received-From: 59.151.112.132 Subject: [Qemu-devel] [PATCH V2 2/4] net/colo-compare.c: Compare the tcp packets that has the same sequence number X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Li Zhijian , zhanghailiang , Zhang Chen Errors-To: qemu-devel-bounces+patchwork-qemu-devel=patchwork.kernel.org@nongnu.org Sender: "Qemu-devel" X-Virus-Scanned: ClamAV using ClamSMTP If primary packet's sequence number not same with secondary packet's sequence number, no need to compare the packet other field. Signed-off-by: Zhang Chen --- net/colo-compare.c | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/net/colo-compare.c b/net/colo-compare.c index 0f8e198..2caeb80 100644 --- a/net/colo-compare.c +++ b/net/colo-compare.c @@ -222,6 +222,12 @@ static int colo_packet_compare_tcp(Packet *spkt, Packet *ppkt) ptcp = (struct tcphdr *)ppkt->transport_header; stcp = (struct tcphdr *)spkt->transport_header; + if ((ptcp->th_flags & TH_SYN) != TH_SYN && + ptcp->th_seq != stcp->th_seq) { + trace_colo_compare_main("colo_packet_compare_tcp seq not same"); + return -1; + } + /* * The 'identification' field in the IP header is *very* random * it almost never matches. Fudge this by ignoring differences in