From patchwork Sat Jul 2 06:22:19 2016 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Zhang Chen X-Patchwork-Id: 643382 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 3rhNbt1qlQz9syB for ; Sat, 2 Jul 2016 16:27:06 +1000 (AEST) Received: from localhost ([::1]:37109 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1bJEON-0002Nz-5F for incoming@patchwork.ozlabs.org; Sat, 02 Jul 2016 02:27:03 -0400 Received: from eggs.gnu.org ([2001:4830:134:3::10]:39795) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1bJEKP-0006CS-T4 for qemu-devel@nongnu.org; Sat, 02 Jul 2016 02:22:58 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1bJEKN-0006QE-TM for qemu-devel@nongnu.org; Sat, 02 Jul 2016 02:22:56 -0400 Received: from [59.151.112.132] (port=26750 helo=heian.cn.fujitsu.com) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1bJEKJ-0006Ny-VR for qemu-devel@nongnu.org; Sat, 02 Jul 2016 02:22:55 -0400 X-IronPort-AV: E=Sophos;i="5.22,518,1449504000"; d="scan'208";a="8287183" Received: from unknown (HELO cn.fujitsu.com) ([10.167.33.5]) by heian.cn.fujitsu.com with ESMTP; 02 Jul 2016 14:21:55 +0800 Received: from G08CNEXCHPEKD02.g08.fujitsu.local (unknown [10.167.33.83]) by cn.fujitsu.com (Postfix) with ESMTP id 1ADAB41C0BBB; Sat, 2 Jul 2016 14:21:54 +0800 (CST) Received: from G08FNSTD140215.g08.fujitsu.local (10.167.226.56) by G08CNEXCHPEKD02.g08.fujitsu.local (10.167.33.89) with Microsoft SMTP Server (TLS) id 14.3.279.2; Sat, 2 Jul 2016 14:21:53 +0800 From: Zhang Chen To: qemu devel , Jason Wang Date: Sat, 2 Jul 2016 14:22:19 +0800 Message-ID: <1467440540-6630-3-git-send-email-zhangchen.fnst@cn.fujitsu.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1467440540-6630-1-git-send-email-zhangchen.fnst@cn.fujitsu.com> References: <1467440540-6630-1-git-send-email-zhangchen.fnst@cn.fujitsu.com> MIME-Version: 1.0 X-Originating-IP: [10.167.226.56] X-yoursite-MailScanner-ID: 1ADAB41C0BBB.AE757 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] [RFC PATCH V2 2/3] filter-rewriter: track connection and parse packet 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" We use colo-base.h to track connection and parse packet Signed-off-by: Zhang Chen Signed-off-by: Li Zhijian Signed-off-by: Wen Congyang --- net/filter-rewriter.c | 52 +++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 52 insertions(+) diff --git a/net/filter-rewriter.c b/net/filter-rewriter.c index 08b015d..c38ab24 100644 --- a/net/filter-rewriter.c +++ b/net/filter-rewriter.c @@ -50,6 +50,20 @@ typedef struct RewriterState { uint32_t hashtable_size; } RewriterState; +/* + * Return 1 on success, if return 0 means the pkt + * is not TCP packet + */ +static int is_tcp_packet(Packet *pkt) +{ + if (!parse_packet_early(pkt) && + pkt->ip->ip_p == IPPROTO_TCP) { + return 1; + } else { + return 0; + } +} + static ssize_t colo_rewriter_receive_iov(NetFilterState *nf, NetClientState *sender, unsigned flags, @@ -57,11 +71,49 @@ static ssize_t colo_rewriter_receive_iov(NetFilterState *nf, int iovcnt, NetPacketSent *sent_cb) { + RewriterState *s = FILTER_COLO_REWRITER(nf); + Connection *conn; + ConnectionKey key = {{ 0 } }; + Packet *pkt; + ssize_t size = iov_size(iov, iovcnt); + char *buf = g_malloc0(size); + + iov_to_buf(iov, iovcnt, 0, buf, size); + pkt = packet_new(buf, size); + /* * if we get tcp packet * we will rewrite it to make secondary guest's * connection established successfully */ + if (is_tcp_packet(pkt)) { + if (sender == nf->netdev) { + fill_connection_key(pkt, &key, SECONDARY); + } else { + fill_connection_key(pkt, &key, PRIMARY); + } + + conn = connection_get(s->connection_track_table, + &key, + &s->hashtable_size); + if (!conn->processing) { + qemu_mutex_lock(&s->conn_list_lock); + g_queue_push_tail(&s->conn_list, conn); + qemu_mutex_unlock(&s->conn_list_lock); + conn->processing = true; + } + + if (sender == nf->netdev) { + /* NET_FILTER_DIRECTION_TX */ + /* handle_primary_tcp_pkt */ + } else { + /* NET_FILTER_DIRECTION_RX */ + /* handle_secondary_tcp_pkt */ + } + } + + packet_destroy(pkt, NULL); + pkt = NULL; return 0; }