From patchwork Thu Mar 9 07:40:07 2017 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Zhang Chen X-Patchwork-Id: 9612399 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 16F46602B4 for ; Thu, 9 Mar 2017 07:41:42 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 0C5532857E for ; Thu, 9 Mar 2017 07:41:42 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id F277A285F7; Thu, 9 Mar 2017 07:41:41 +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 79EE22857E for ; Thu, 9 Mar 2017 07:41:40 +0000 (UTC) Received: from localhost ([::1]:60830 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1clshd-0007HO-Vj for patchwork-qemu-devel@patchwork.kernel.org; Thu, 09 Mar 2017 02:41:37 -0500 Received: from eggs.gnu.org ([2001:4830:134:3::10]:32923) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1clshS-0007HG-3i for qemu-devel@nongnu.org; Thu, 09 Mar 2017 02:41:27 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1clshO-0005iR-6N for qemu-devel@nongnu.org; Thu, 09 Mar 2017 02:41:26 -0500 Received: from [59.151.112.132] (port=2879 helo=heian.cn.fujitsu.com) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1clshN-0005KQ-P4 for qemu-devel@nongnu.org; Thu, 09 Mar 2017 02:41:22 -0500 X-IronPort-AV: E=Sophos;i="5.22,518,1449504000"; d="scan'208";a="16369451" Received: from unknown (HELO cn.fujitsu.com) ([10.167.33.5]) by heian.cn.fujitsu.com with ESMTP; 09 Mar 2017 15:41:06 +0800 Received: from G08CNEXCHPEKD01.g08.fujitsu.local (unknown [10.167.33.80]) by cn.fujitsu.com (Postfix) with ESMTP id 0D4CE47D8B9C; Thu, 9 Mar 2017 15:41:05 +0800 (CST) Received: from localhost.localdomain (10.167.226.56) by G08CNEXCHPEKD01.g08.fujitsu.local (10.167.33.89) with Microsoft SMTP Server (TLS) id 14.3.319.2; Thu, 9 Mar 2017 15:41:05 +0800 From: Zhang Chen To: qemu devel Date: Thu, 9 Mar 2017 15:40:07 +0800 Message-ID: <1489045207-27706-1-git-send-email-zhangchen.fnst@cn.fujitsu.com> X-Mailer: git-send-email 2.7.4 MIME-Version: 1.0 X-Originating-IP: [10.167.226.56] X-yoursite-MailScanner-ID: 0D4CE47D8B9C.ADECD 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] COLO-compare: Fix trace_event print bug 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: Jason Wang , Zhang Chen Errors-To: qemu-devel-bounces+patchwork-qemu-devel=patchwork.kernel.org@nongnu.org Sender: "Qemu-devel" X-Virus-Scanned: ClamAV using ClamSMTP Because of inet_ntoa() return a statically allocated buffer, subsequent calls will overwrite, So we fix this bug. Signed-off-by: Zhang Chen --- net/colo-compare.c | 33 +++++++++++++++++++++++++-------- 1 file changed, 25 insertions(+), 8 deletions(-) diff --git a/net/colo-compare.c b/net/colo-compare.c index 282727b..54e6d40 100644 --- a/net/colo-compare.c +++ b/net/colo-compare.c @@ -182,10 +182,18 @@ static int packet_enqueue(CompareState *s, int mode) */ static int colo_packet_compare_common(Packet *ppkt, Packet *spkt, int offset) { - trace_colo_compare_ip_info(ppkt->size, inet_ntoa(ppkt->ip->ip_src), - inet_ntoa(ppkt->ip->ip_dst), spkt->size, - inet_ntoa(spkt->ip->ip_src), - inet_ntoa(spkt->ip->ip_dst)); + if (trace_event_get_state(TRACE_COLO_COMPARE_MISCOMPARE)) { + char pri_ip_src[20], pri_ip_dst[20], sec_ip_src[20], sec_ip_dst[20]; + + strcpy(pri_ip_src, inet_ntoa(ppkt->ip->ip_src)); + strcpy(pri_ip_dst, inet_ntoa(ppkt->ip->ip_dst)); + strcpy(sec_ip_src, inet_ntoa(spkt->ip->ip_src)); + strcpy(sec_ip_dst, inet_ntoa(spkt->ip->ip_dst)); + + trace_colo_compare_ip_info(ppkt->size, pri_ip_src, + pri_ip_dst, spkt->size, + sec_ip_src, sec_ip_dst); + } if (ppkt->size == spkt->size) { return memcmp(ppkt->data + offset, spkt->data + offset, @@ -336,10 +344,19 @@ static int colo_packet_compare_icmp(Packet *spkt, Packet *ppkt) static int colo_packet_compare_other(Packet *spkt, Packet *ppkt) { trace_colo_compare_main("compare other"); - trace_colo_compare_ip_info(ppkt->size, inet_ntoa(ppkt->ip->ip_src), - inet_ntoa(ppkt->ip->ip_dst), spkt->size, - inet_ntoa(spkt->ip->ip_src), - inet_ntoa(spkt->ip->ip_dst)); + if (trace_event_get_state(TRACE_COLO_COMPARE_MISCOMPARE)) { + char pri_ip_src[20], pri_ip_dst[20], sec_ip_src[20], sec_ip_dst[20]; + + strcpy(pri_ip_src, inet_ntoa(ppkt->ip->ip_src)); + strcpy(pri_ip_dst, inet_ntoa(ppkt->ip->ip_dst)); + strcpy(sec_ip_src, inet_ntoa(spkt->ip->ip_src)); + strcpy(sec_ip_dst, inet_ntoa(spkt->ip->ip_dst)); + + trace_colo_compare_ip_info(ppkt->size, pri_ip_src, + pri_ip_dst, spkt->size, + sec_ip_src, sec_ip_dst); + } + return colo_packet_compare_common(ppkt, spkt, 0); }