From patchwork Fri Apr 28 09:47:14 2017 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Zhang Chen X-Patchwork-Id: 756303 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Received: from lists.gnu.org (lists.gnu.org [IPv6:2001:4830:134:3::11]) (using TLSv1 with cipher AES256-SHA (256/256 bits)) (No client certificate requested) by ozlabs.org (Postfix) with ESMTPS id 3wDpyg6Zd3z9s8H for ; Fri, 28 Apr 2017 19:52:43 +1000 (AEST) Received: from localhost ([::1]:36112 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1d42Zt-000835-Fh for incoming@patchwork.ozlabs.org; Fri, 28 Apr 2017 05:52:41 -0400 Received: from eggs.gnu.org ([2001:4830:134:3::10]:33862) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1d42Ux-0004f4-68 for qemu-devel@nongnu.org; Fri, 28 Apr 2017 05:47:36 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1d42Ut-0001Ti-Av for qemu-devel@nongnu.org; Fri, 28 Apr 2017 05:47:35 -0400 Received: from [59.151.112.132] (port=20529 helo=heian.cn.fujitsu.com) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1d42Us-0001QC-Ul for qemu-devel@nongnu.org; Fri, 28 Apr 2017 05:47:31 -0400 X-IronPort-AV: E=Sophos;i="5.22,518,1449504000"; d="scan'208";a="18277659" Received: from unknown (HELO cn.fujitsu.com) ([10.167.33.5]) by heian.cn.fujitsu.com with ESMTP; 28 Apr 2017 17:47:20 +0800 Received: from G08CNEXCHPEKD01.g08.fujitsu.local (unknown [10.167.33.80]) by cn.fujitsu.com (Postfix) with ESMTP id 65D9F467021F; Fri, 28 Apr 2017 17:47:21 +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; Fri, 28 Apr 2017 17:47:21 +0800 From: Zhang Chen To: qemu devel , Jason Wang Date: Fri, 28 Apr 2017 17:47:14 +0800 Message-ID: <1493372840-24551-5-git-send-email-zhangchen.fnst@cn.fujitsu.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1493372840-24551-1-git-send-email-zhangchen.fnst@cn.fujitsu.com> References: <1493372840-24551-1-git-send-email-zhangchen.fnst@cn.fujitsu.com> MIME-Version: 1.0 X-Originating-IP: [10.167.226.56] X-yoursite-MailScanner-ID: 65D9F467021F.ACE47 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 V3 04/10] net/filter-mirror.c: Add filter-mirror and filter-redirector vnet support. 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: zhanghailiang , Li Zhijian , weifuqiang , "eddie . dong" , Zhang Chen , bian naimeng Errors-To: qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org Sender: "Qemu-devel" In this patch, we change the send packet format from struct {int size; const uint8_t buf[];} to {int size; int vnet_hdr_len; const uint8_t buf[];}. make other module(like colo-compare) know how to parse net packet correctly. Signed-off-by: Zhang Chen --- net/filter-mirror.c | 28 +++++++++++++++++++++++----- 1 file changed, 23 insertions(+), 5 deletions(-) diff --git a/net/filter-mirror.c b/net/filter-mirror.c index 72fa7c2..bb9ecf3 100644 --- a/net/filter-mirror.c +++ b/net/filter-mirror.c @@ -43,12 +43,14 @@ typedef struct MirrorState { SocketReadState rs; } MirrorState; -static int filter_mirror_send(CharBackend *chr_out, +static int filter_mirror_send(MirrorState *s, const struct iovec *iov, int iovcnt) { + NetFilterState *nf = NETFILTER(s); int ret = 0; ssize_t size = 0; + ssize_t vnet_hdr_len; uint32_t len = 0; char *buf; @@ -58,14 +60,30 @@ static int filter_mirror_send(CharBackend *chr_out, } len = htonl(size); - ret = qemu_chr_fe_write_all(chr_out, (uint8_t *)&len, sizeof(len)); + ret = qemu_chr_fe_write_all(&s->chr_out, (uint8_t *)&len, sizeof(len)); + if (ret != sizeof(len)) { + goto err; + } + + /* + * We send vnet header len make other module(like colo-compare) + * know how to parse net packet correctly. + */ + if (qemu_get_using_vnet_hdr(nf->netdev)) { + vnet_hdr_len = qemu_get_vnet_hdr_len(nf->netdev); + } else { + vnet_hdr_len = qemu_get_vnet_hdr_len(nf->netdev->peer); + } + + len = htonl(vnet_hdr_len); + ret = qemu_chr_fe_write_all(&s->chr_out, (uint8_t *)&len, sizeof(len)); if (ret != sizeof(len)) { goto err; } buf = g_malloc(size); iov_to_buf(iov, iovcnt, 0, buf, size); - ret = qemu_chr_fe_write_all(chr_out, (uint8_t *)buf, size); + ret = qemu_chr_fe_write_all(&s->chr_out, (uint8_t *)buf, size); g_free(buf); if (ret != size) { goto err; @@ -141,7 +159,7 @@ static ssize_t filter_mirror_receive_iov(NetFilterState *nf, MirrorState *s = FILTER_MIRROR(nf); int ret; - ret = filter_mirror_send(&s->chr_out, iov, iovcnt); + ret = filter_mirror_send(s, iov, iovcnt); if (ret) { error_report("filter_mirror_send failed(%s)", strerror(-ret)); } @@ -164,7 +182,7 @@ static ssize_t filter_redirector_receive_iov(NetFilterState *nf, int ret; if (qemu_chr_fe_get_driver(&s->chr_out)) { - ret = filter_mirror_send(&s->chr_out, iov, iovcnt); + ret = filter_mirror_send(s, iov, iovcnt); if (ret) { error_report("filter_mirror_send failed(%s)", strerror(-ret)); }