From patchwork Thu Apr 20 06:39:02 2017 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Zhang Chen X-Patchwork-Id: 9689577 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork.web.codeaurora.org (Postfix) with ESMTP id EBEE660326 for ; Thu, 20 Apr 2017 06:40:07 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id DD470280B0 for ; Thu, 20 Apr 2017 06:40:07 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id D08772845B; Thu, 20 Apr 2017 06:40:07 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-6.9 required=2.0 tests=BAYES_00,RCVD_IN_DNSWL_HI autolearn=ham version=3.3.1 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 mail.wl.linuxfoundation.org (Postfix) with ESMTPS id 4C7F9280B0 for ; Thu, 20 Apr 2017 06:40:07 +0000 (UTC) Received: from localhost ([::1]:51887 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1d15l8-0004UN-6C for patchwork-qemu-devel@patchwork.kernel.org; Thu, 20 Apr 2017 02:40:06 -0400 Received: from eggs.gnu.org ([2001:4830:134:3::10]:40989) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1d15jz-0004U9-5F for qemu-devel@nongnu.org; Thu, 20 Apr 2017 02:38:56 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1d15jw-0005T6-1b for qemu-devel@nongnu.org; Thu, 20 Apr 2017 02:38:55 -0400 Received: from [59.151.112.132] (port=59779 helo=heian.cn.fujitsu.com) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1d15jv-0005Sl-3y for qemu-devel@nongnu.org; Thu, 20 Apr 2017 02:38:51 -0400 X-IronPort-AV: E=Sophos;i="5.22,518,1449504000"; d="scan'208";a="17962608" Received: from unknown (HELO cn.fujitsu.com) ([10.167.33.5]) by heian.cn.fujitsu.com with ESMTP; 20 Apr 2017 14:38:50 +0800 Received: from G08CNEXCHPEKD01.g08.fujitsu.local (unknown [10.167.33.80]) by cn.fujitsu.com (Postfix) with ESMTP id 0FE9B47E6344; Thu, 20 Apr 2017 14:38:49 +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; Thu, 20 Apr 2017 14:38:48 +0800 From: Zhang Chen To: qemu devel , Jason Wang Date: Thu, 20 Apr 2017 14:39:02 +0800 Message-ID: <1492670346-18004-3-git-send-email-zhangchen.fnst@cn.fujitsu.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1492670346-18004-1-git-send-email-zhangchen.fnst@cn.fujitsu.com> References: <1492670346-18004-1-git-send-email-zhangchen.fnst@cn.fujitsu.com> MIME-Version: 1.0 X-Originating-IP: [10.167.226.56] X-yoursite-MailScanner-ID: 0FE9B47E6344.AC8FC 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 V2 2/6] net/net.c: Add vnet header length to SocketReadState 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 , bian naimeng , "eddie . dong" , zhanghailiang , Zhang Chen Errors-To: qemu-devel-bounces+patchwork-qemu-devel=patchwork.kernel.org@nongnu.org Sender: "Qemu-devel" X-Virus-Scanned: ClamAV using ClamSMTP Address Jason Wang's comments add vnet header length to SocketReadState. So we change net_fill_rstate() to read struct {int size; int vnet_hdr_len; const uint8_t buf[];}. Signed-off-by: Zhang Chen --- include/net/net.h | 4 +++- net/net.c | 24 ++++++++++++++++++++++-- 2 files changed, 25 insertions(+), 3 deletions(-) diff --git a/include/net/net.h b/include/net/net.h index 99b28d5..1204fe5 100644 --- a/include/net/net.h +++ b/include/net/net.h @@ -111,9 +111,11 @@ typedef struct NICState { } NICState; struct SocketReadState { - int state; /* 0 = getting length, 1 = getting data */ + /* 0 = getting length, 1 = getting vnet header length, 2 = getting data */ + int state; uint32_t index; uint32_t packet_len; + uint32_t vnet_hdr_len; uint8_t buf[NET_BUFSIZE]; SocketReadStateFinalize *finalize; }; diff --git a/net/net.c b/net/net.c index 0ac3b9e..d467452 100644 --- a/net/net.c +++ b/net/net.c @@ -1621,8 +1621,12 @@ int net_fill_rstate(SocketReadState *rs, const uint8_t *buf, int size) unsigned int l; while (size > 0) { - /* reassemble a packet from the network */ - switch (rs->state) { /* 0 = getting length, 1 = getting data */ + /* Reassemble a packet from the network. + * 0 = getting length. + * 1 = getting vnet header length. + * 2 = getting data. + */ + switch (rs->state) { case 0: l = 4 - rs->index; if (l > size) { @@ -1640,6 +1644,22 @@ int net_fill_rstate(SocketReadState *rs, const uint8_t *buf, int size) } break; case 1: + l = 4 - rs->index; + if (l > size) { + l = size; + } + memcpy(rs->buf + rs->index, buf, l); + buf += l; + size -= l; + rs->index += l; + if (rs->index == 4) { + /* got vnet header length */ + rs->vnet_hdr_len = ntohl(*(uint32_t *)rs->buf); + rs->index = 0; + rs->state = 2; + } + break; + case 2: l = rs->packet_len - rs->index; if (l > size) { l = size;