From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id AF5F4C433EF for ; Thu, 28 Oct 2021 09:23:14 +0000 (UTC) Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 47D6160E78 for ; Thu, 28 Oct 2021 09:23:14 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.4.1 mail.kernel.org 47D6160E78 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=intel.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=nongnu.org Received: from localhost ([::1]:35388 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1mg1cv-0003Mw-Cj for qemu-devel@archiver.kernel.org; Thu, 28 Oct 2021 05:23:13 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:42978) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1mg1bf-0001Is-Ks for qemu-devel@nongnu.org; Thu, 28 Oct 2021 05:21:55 -0400 Received: from mga11.intel.com ([192.55.52.93]:39002) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1mg1be-0005oG-04 for qemu-devel@nongnu.org; Thu, 28 Oct 2021 05:21:55 -0400 X-IronPort-AV: E=McAfee;i="6200,9189,10150"; a="227819643" X-IronPort-AV: E=Sophos;i="5.87,189,1631602800"; d="scan'208";a="227819643" Received: from orsmga008.jf.intel.com ([10.7.209.65]) by fmsmga102.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 28 Oct 2021 02:15:16 -0700 X-IronPort-AV: E=Sophos;i="5.87,189,1631602800"; d="scan'208";a="498301889" Received: from unknown (HELO localhost.localdomain) ([10.239.13.19]) by orsmga008-auth.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 28 Oct 2021 02:15:14 -0700 From: Zhang Chen To: Jason Wang Subject: [PATCH V5 1/3] net/filter: Optimize transfer protocol for filter-mirror/redirector Date: Thu, 28 Oct 2021 17:05:54 +0800 Message-Id: <20211028090556.3168043-2-chen.zhang@intel.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20211028090556.3168043-1-chen.zhang@intel.com> References: <20211028090556.3168043-1-chen.zhang@intel.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Received-SPF: pass client-ip=192.55.52.93; envelope-from=chen.zhang@intel.com; helo=mga11.intel.com X-Spam_score_int: -68 X-Spam_score: -6.9 X-Spam_bar: ------ X-Spam_report: (-6.9 / 5.0 requ) BAYES_00=-1.9, RCVD_IN_DNSWL_HI=-5, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Zhang Chen , qemu-dev , Li Zhijian , Markus Armbruster Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" Make the vnet header a necessary part of filter transfer protocol. It make other modules(like another filter-redirector,colo-compare...) know how to parse net packet correctly. If local device is not the virtio-net-pci, vnet_hdr_len will be 0. Signed-off-by: Zhang Chen --- net/filter-mirror.c | 34 ++++++++++++++++------------------ 1 file changed, 16 insertions(+), 18 deletions(-) diff --git a/net/filter-mirror.c b/net/filter-mirror.c index f20240cc9f..24d3e498e9 100644 --- a/net/filter-mirror.c +++ b/net/filter-mirror.c @@ -39,6 +39,7 @@ struct MirrorState { CharBackend chr_in; CharBackend chr_out; SocketReadState rs; + /* Keep compatibility for the management layer */ bool vnet_hdr; }; @@ -48,7 +49,7 @@ static int filter_send(MirrorState *s, { NetFilterState *nf = NETFILTER(s); int ret = 0; - ssize_t size = 0; + ssize_t size = 0, vnet_hdr_len = 0; uint32_t len = 0; char *buf; @@ -63,21 +64,18 @@ static int filter_send(MirrorState *s, goto err; } - if (s->vnet_hdr) { - /* - * If vnet_hdr = on, we send vnet header len to make other - * module(like colo-compare) know how to parse net - * packet correctly. - */ - ssize_t vnet_hdr_len; - - vnet_hdr_len = nf->netdev->vnet_hdr_len; + /* + * The vnet header is the necessary part of filter transfer protocol. + * It make other module(like colo-compare) know how to parse net + * packet correctly. If device is not the virtio-net-pci, + * vnet_hdr_len will be 0. + */ + vnet_hdr_len = nf->netdev->vnet_hdr_len; - 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; - } + 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); @@ -252,7 +250,7 @@ static void filter_redirector_setup(NetFilterState *nf, Error **errp) } } - net_socket_rs_init(&s->rs, redirector_rs_finalize, s->vnet_hdr); + net_socket_rs_init(&s->rs, redirector_rs_finalize, true); if (s->indev) { chr = qemu_chr_find(s->indev); @@ -406,14 +404,14 @@ static void filter_mirror_init(Object *obj) { MirrorState *s = FILTER_MIRROR(obj); - s->vnet_hdr = false; + s->vnet_hdr = true; } static void filter_redirector_init(Object *obj) { MirrorState *s = FILTER_REDIRECTOR(obj); - s->vnet_hdr = false; + s->vnet_hdr = true; } static void filter_mirror_fini(Object *obj) -- 2.25.1