From patchwork Thu Sep 8 09:46:10 2016 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Zhang Chen X-Patchwork-Id: 667682 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org 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 ozlabs.org (Postfix) with ESMTPS id 3sVPcS6BtHz9rxm for ; Fri, 9 Sep 2016 01:38:16 +1000 (AEST) Received: from localhost ([::1]:48753 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1bi1P4-0001iJ-8p for incoming@patchwork.ozlabs.org; Thu, 08 Sep 2016 11:38:14 -0400 Received: from eggs.gnu.org ([2001:4830:134:3::10]:57350) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1bhvvG-0004v1-14 for qemu-devel@nongnu.org; Thu, 08 Sep 2016 05:47:09 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1bhvvD-000735-Oz for qemu-devel@nongnu.org; Thu, 08 Sep 2016 05:47:05 -0400 Received: from [59.151.112.132] (port=57278 helo=heian.cn.fujitsu.com) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1bhvvD-0006kT-C5 for qemu-devel@nongnu.org; Thu, 08 Sep 2016 05:47:03 -0400 X-IronPort-AV: E=Sophos;i="5.22,518,1449504000"; d="scan'208";a="10752443" Received: from unknown (HELO cn.fujitsu.com) ([10.167.33.5]) by heian.cn.fujitsu.com with ESMTP; 08 Sep 2016 17:46:30 +0800 Received: from G08CNEXCHPEKD02.g08.fujitsu.local (unknown [10.167.33.83]) by cn.fujitsu.com (Postfix) with ESMTP id 9D2514042406; Thu, 8 Sep 2016 17:46:26 +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 14.3.279.2; Thu, 8 Sep 2016 17:46:26 +0800 From: Zhang Chen To: qemu devel , Jason Wang Date: Thu, 8 Sep 2016 17:46:10 +0800 Message-ID: <1473327974-21465-9-git-send-email-zhangchen.fnst@cn.fujitsu.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1473327974-21465-1-git-send-email-zhangchen.fnst@cn.fujitsu.com> References: <1473327974-21465-1-git-send-email-zhangchen.fnst@cn.fujitsu.com> MIME-Version: 1.0 X-Originating-IP: [10.167.226.56] X-yoursite-MailScanner-ID: 9D2514042406.AA997 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 V14 08/12] filter-rewriter: introduce filter-rewriter initialization 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 , "eddie . dong" , "Dr . David Alan Gilbert" , Zhang Chen , zhanghailiang Errors-To: qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org Sender: "Qemu-devel" Filter-rewriter is a part of COLO project. It will rewrite some of secondary packet to make secondary guest's tcp connection established successfully. In this module we will rewrite tcp packet's ack to the secondary from primary,and rewrite tcp packet's seq to the primary from secondary. usage: colo secondary: -object filter-redirector,id=f1,netdev=hn0,queue=tx,indev=red0 -object filter-redirector,id=f2,netdev=hn0,queue=rx,outdev=red1 -object filter-rewriter,id=rew0,netdev=hn0,queue=all Signed-off-by: Zhang Chen Signed-off-by: Li Zhijian Signed-off-by: Wen Congyang --- net/Makefile.objs | 1 + net/filter-rewriter.c | 105 ++++++++++++++++++++++++++++++++++++++++++++++++++ qemu-options.hx | 13 +++++++ vl.c | 3 +- 4 files changed, 121 insertions(+), 1 deletion(-) create mode 100644 net/filter-rewriter.c diff --git a/net/Makefile.objs b/net/Makefile.objs index beb504b..2a80df5 100644 --- a/net/Makefile.objs +++ b/net/Makefile.objs @@ -18,3 +18,4 @@ common-obj-y += filter-buffer.o common-obj-y += filter-mirror.o common-obj-y += colo-compare.o common-obj-y += colo.o +common-obj-y += filter-rewriter.o diff --git a/net/filter-rewriter.c b/net/filter-rewriter.c new file mode 100644 index 0000000..de29f07 --- /dev/null +++ b/net/filter-rewriter.c @@ -0,0 +1,105 @@ +/* + * Copyright (c) 2016 HUAWEI TECHNOLOGIES CO., LTD. + * Copyright (c) 2016 FUJITSU LIMITED + * Copyright (c) 2016 Intel Corporation + * + * Author: Zhang Chen + * + * This work is licensed under the terms of the GNU GPL, version 2 or + * later. See the COPYING file in the top-level directory. + */ + +#include "qemu/osdep.h" +#include "net/colo.h" +#include "net/filter.h" +#include "net/net.h" +#include "qemu-common.h" +#include "qapi/error.h" +#include "qapi/qmp/qerror.h" +#include "qapi-visit.h" +#include "qom/object.h" +#include "qemu/main-loop.h" +#include "qemu/iov.h" +#include "net/checksum.h" + +#define FILTER_COLO_REWRITER(obj) \ + OBJECT_CHECK(RewriterState, (obj), TYPE_FILTER_REWRITER) + +#define TYPE_FILTER_REWRITER "filter-rewriter" + +typedef struct RewriterState { + NetFilterState parent_obj; + NetQueue *incoming_queue; + /* hashtable to save connection */ + GHashTable *connection_track_table; +} RewriterState; + +static void filter_rewriter_flush(NetFilterState *nf) +{ + RewriterState *s = FILTER_COLO_REWRITER(nf); + + if (!qemu_net_queue_flush(s->incoming_queue)) { + /* Unable to empty the queue, purge remaining packets */ + qemu_net_queue_purge(s->incoming_queue, nf->netdev); + } +} + +static ssize_t colo_rewriter_receive_iov(NetFilterState *nf, + NetClientState *sender, + unsigned flags, + const struct iovec *iov, + int iovcnt, + NetPacketSent *sent_cb) +{ + /* + * if we get tcp packet + * we will rewrite it to make secondary guest's + * connection established successfully + */ + return 0; +} + +static void colo_rewriter_cleanup(NetFilterState *nf) +{ + RewriterState *s = FILTER_COLO_REWRITER(nf); + + /* flush packets */ + if (s->incoming_queue) { + filter_rewriter_flush(nf); + g_free(s->incoming_queue); + } +} + +static void colo_rewriter_setup(NetFilterState *nf, Error **errp) +{ + RewriterState *s = FILTER_COLO_REWRITER(nf); + + s->connection_track_table = g_hash_table_new_full(connection_key_hash, + connection_key_equal, + g_free, + connection_destroy); + s->incoming_queue = qemu_new_net_queue(qemu_netfilter_pass_to_next, nf); +} + +static void colo_rewriter_class_init(ObjectClass *oc, void *data) +{ + NetFilterClass *nfc = NETFILTER_CLASS(oc); + + nfc->setup = colo_rewriter_setup; + nfc->cleanup = colo_rewriter_cleanup; + nfc->receive_iov = colo_rewriter_receive_iov; +} + +static const TypeInfo colo_rewriter_info = { + .name = TYPE_FILTER_REWRITER, + .parent = TYPE_NETFILTER, + .class_init = colo_rewriter_class_init, + .instance_size = sizeof(RewriterState), +}; + +static void register_types(void) +{ + type_register_static(&colo_rewriter_info); +} + +type_init(register_types); diff --git a/qemu-options.hx b/qemu-options.hx index 87fbba3..5cd50a8 100644 --- a/qemu-options.hx +++ b/qemu-options.hx @@ -3880,6 +3880,19 @@ Create a filter-redirector we need to differ outdev id from indev id, id can not be the same. we can just use indev or outdev, but at least one of indev or outdev need to be specified. +@item -object filter-rewriter,id=@var{id},netdev=@var{netdevid},rewriter-mode=@var{mode}[,queue=@var{all|rx|tx}] + +Filter-rewriter is a part of COLO project.It will rewrite tcp packet to +secondary from primary to keep secondary tcp connection,and rewrite +tcp packet to primary from secondary make tcp packet can be handled by +client. + +usage: +colo secondary: +-object filter-redirector,id=f1,netdev=hn0,queue=tx,indev=red0 +-object filter-redirector,id=f2,netdev=hn0,queue=rx,outdev=red1 +-object filter-rewriter,id=rew0,netdev=hn0,queue=all + @item -object filter-dump,id=@var{id},netdev=@var{dev},file=@var{filename}][,maxlen=@var{len}] Dump the network traffic on netdev @var{dev} to the file specified by diff --git a/vl.c b/vl.c index e73a1d1..cda24ce 100644 --- a/vl.c +++ b/vl.c @@ -2807,7 +2807,8 @@ static bool object_create_initial(const char *type) g_str_equal(type, "filter-dump") || g_str_equal(type, "filter-mirror") || g_str_equal(type, "filter-redirector") || - g_str_equal(type, "colo-compare")) { + g_str_equal(type, "colo-compare") || + g_str_equal(type, "filter-rewriter")) { return false; }