From patchwork Tue May 23 14:20:38 2017 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Zhang Chen X-Patchwork-Id: 766021 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 3wXHt12HSsz9s0m for ; Wed, 24 May 2017 00:27:21 +1000 (AEST) Received: from localhost ([::1]:49311 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1dDAmM-0007cx-Uc for incoming@patchwork.ozlabs.org; Tue, 23 May 2017 10:27:18 -0400 Received: from eggs.gnu.org ([2001:4830:134:3::10]:42263) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1dDAgL-0002gZ-2J for qemu-devel@nongnu.org; Tue, 23 May 2017 10:21:06 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1dDAgI-00031A-Na for qemu-devel@nongnu.org; Tue, 23 May 2017 10:21:04 -0400 Received: from [59.151.112.132] (port=32707 helo=heian.cn.fujitsu.com) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1dDAgH-0002zE-V3 for qemu-devel@nongnu.org; Tue, 23 May 2017 10:21:02 -0400 X-IronPort-AV: E=Sophos;i="5.22,518,1449504000"; d="scan'208";a="19208529" Received: from unknown (HELO cn.fujitsu.com) ([10.167.33.5]) by heian.cn.fujitsu.com with ESMTP; 23 May 2017 22:20:58 +0800 Received: from G08CNEXCHPEKD02.g08.fujitsu.local (unknown [10.167.33.83]) by cn.fujitsu.com (Postfix) with ESMTP id 20AD047C7C8C; Tue, 23 May 2017 22:20:58 +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; Tue, 23 May 2017 22:20:57 +0800 From: Zhang Chen To: qemu devel , Jason Wang Date: Tue, 23 May 2017 22:20:38 +0800 Message-ID: <1495549241-23380-7-git-send-email-zhangchen.fnst@cn.fujitsu.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1495549241-23380-1-git-send-email-zhangchen.fnst@cn.fujitsu.com> References: <1495549241-23380-1-git-send-email-zhangchen.fnst@cn.fujitsu.com> MIME-Version: 1.0 X-Originating-IP: [10.167.226.56] X-yoursite-MailScanner-ID: 20AD047C7C8C.AEE3A 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 V5 6/9] net/colo-compare.c: Make colo-compare support vnet_hdr_len 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" We add the vnet_hdr option for colo-compare, default is disable. If you use virtio-net-pci net driver, please enable it. You can use it for example: -object colo-compare,id=comp0,primary_in=compare0-0,secondary_in=compare1,outdev=compare_out0,vnet_hdr=on COLO-compare can get vnet header length from filter, Add vnet_hdr_len to struct packet and output packet with the vnet_hdr_len. Signed-off-by: Zhang Chen --- net/colo-compare.c | 76 +++++++++++++++++++++++++++++++++++++++++++++++------- qemu-options.hx | 4 +-- 2 files changed, 69 insertions(+), 11 deletions(-) diff --git a/net/colo-compare.c b/net/colo-compare.c index bf0b856..f89b380 100644 --- a/net/colo-compare.c +++ b/net/colo-compare.c @@ -73,6 +73,7 @@ typedef struct CompareState { CharBackend chr_out; SocketReadState pri_rs; SocketReadState sec_rs; + bool vnet_hdr; /* connection list: the connections belonged to this NIC could be found * in this list. @@ -97,9 +98,10 @@ enum { SECONDARY_IN, }; -static int compare_chr_send(CharBackend *out, +static int compare_chr_send(CompareState *s, const uint8_t *buf, - uint32_t size); + uint32_t size, + uint32_t vnet_hdr_len); static gint seq_sorter(Packet *a, Packet *b, gpointer data) { @@ -472,7 +474,10 @@ static void colo_compare_connection(void *opaque, void *user_data) } if (result) { - ret = compare_chr_send(&s->chr_out, pkt->data, pkt->size); + ret = compare_chr_send(s, + pkt->data, + pkt->size, + pkt->vnet_hdr_len); if (ret < 0) { error_report("colo_send_primary_packet failed"); } @@ -493,9 +498,10 @@ static void colo_compare_connection(void *opaque, void *user_data) } } -static int compare_chr_send(CharBackend *out, +static int compare_chr_send(CompareState *s, const uint8_t *buf, - uint32_t size) + uint32_t size, + uint32_t vnet_hdr_len) { int ret = 0; uint32_t len = htonl(size); @@ -504,12 +510,24 @@ static int compare_chr_send(CharBackend *out, return 0; } - ret = qemu_chr_fe_write_all(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; } - ret = qemu_chr_fe_write_all(out, (uint8_t *)buf, size); + if (s->vnet_hdr) { + /* + * We send vnet header len make other module(like filter-redirector) + * know how to parse net packet correctly. + */ + 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; + } + } + + ret = qemu_chr_fe_write_all(&s->chr_out, (uint8_t *)buf, size); if (ret != size) { goto err; } @@ -646,13 +664,38 @@ static void compare_set_outdev(Object *obj, const char *value, Error **errp) s->outdev = g_strdup(value); } +static char *compare_get_vnet_hdr(Object *obj, Error **errp) +{ + CompareState *s = COLO_COMPARE(obj); + + return s->vnet_hdr ? g_strdup("on") : g_strdup("off"); +} + +static void compare_set_vnet_hdr(Object *obj, + const char *value, + Error **errp) +{ + CompareState *s = COLO_COMPARE(obj); + + if (strcmp(value, "on") && strcmp(value, "off")) { + error_setg(errp, "Invalid value for colo-compare vnet_hdr, " + "should be 'on' or 'off'"); + return; + } + + s->vnet_hdr = !strcmp(value, "on"); +} + static void compare_pri_rs_finalize(SocketReadState *pri_rs) { CompareState *s = container_of(pri_rs, CompareState, pri_rs); if (packet_enqueue(s, PRIMARY_IN)) { trace_colo_compare_main("primary: unsupported packet in"); - compare_chr_send(&s->chr_out, pri_rs->buf, pri_rs->packet_len); + compare_chr_send(s, + pri_rs->buf, + pri_rs->packet_len, + pri_rs->vnet_hdr_len); } else { /* compare connection */ g_queue_foreach(&s->conn_list, colo_compare_connection, s); @@ -735,7 +778,9 @@ static void colo_compare_complete(UserCreatable *uc, Error **errp) } net_socket_rs_init(&s->pri_rs, compare_pri_rs_finalize); + s->pri_rs.vnet_hdr = s->vnet_hdr; net_socket_rs_init(&s->sec_rs, compare_sec_rs_finalize); + s->sec_rs.vnet_hdr = s->vnet_hdr; g_queue_init(&s->conn_list); @@ -761,7 +806,10 @@ static void colo_flush_packets(void *opaque, void *user_data) while (!g_queue_is_empty(&conn->primary_list)) { pkt = g_queue_pop_head(&conn->primary_list); - compare_chr_send(&s->chr_out, pkt->data, pkt->size); + compare_chr_send(s, + pkt->data, + pkt->size, + pkt->vnet_hdr_len); packet_destroy(pkt, NULL); } while (!g_queue_is_empty(&conn->secondary_list)) { @@ -779,6 +827,8 @@ static void colo_compare_class_init(ObjectClass *oc, void *data) static void colo_compare_init(Object *obj) { + CompareState *s = COLO_COMPARE(obj); + object_property_add_str(obj, "primary_in", compare_get_pri_indev, compare_set_pri_indev, NULL); @@ -788,6 +838,14 @@ static void colo_compare_init(Object *obj) object_property_add_str(obj, "outdev", compare_get_outdev, compare_set_outdev, NULL); + /* + * The vnet_hdr is disabled by default, if you want to enable + * this option, you must enable all the option on related modules + * (like other filter or colo-compare). + */ + s->vnet_hdr = false; + object_property_add_str(obj, "vnet_hdr", compare_get_vnet_hdr, + compare_set_vnet_hdr, NULL); } static void colo_compare_finalize(Object *obj) diff --git a/qemu-options.hx b/qemu-options.hx index a3c4688..bb3f400 100644 --- a/qemu-options.hx +++ b/qemu-options.hx @@ -4057,13 +4057,13 @@ Dump the network traffic on netdev @var{dev} to the file specified by The file format is libpcap, so it can be analyzed with tools such as tcpdump or Wireshark. -@item -object colo-compare,id=@var{id},primary_in=@var{chardevid},secondary_in=@var{chardevid}, -outdev=@var{chardevid} +@item -object colo-compare,id=@var{id},primary_in=@var{chardevid},secondary_in=@var{chardevid},outdev=@var{chardevid},vnet_hdr=@var{on|off} Colo-compare gets packet from primary_in@var{chardevid} and secondary_in@var{chardevid}, than compare primary packet with secondary packet. If the packets are same, we will output primary packet to outdev@var{chardevid}, else we will notify colo-frame do checkpoint and send primary packet to outdev@var{chardevid}. +if vnet_hdr = on, colo compare will send/recv packet with vnet_hdr_len. we must use it with the help of filter-mirror and filter-redirector.