From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from dpdk.org (dpdk.org [92.243.14.124]) by inbox.dpdk.org (Postfix) with ESMTP id 0797DA0613 for ; Fri, 27 Sep 2019 11:30:39 +0200 (CEST) Received: from [92.243.14.124] (localhost [127.0.0.1]) by dpdk.org (Postfix) with ESMTP id A7FBD2E8F; Fri, 27 Sep 2019 11:30:37 +0200 (CEST) Received: from mx1.redhat.com (mx1.redhat.com [209.132.183.28]) by dpdk.org (Postfix) with ESMTP id C546D2C2F; Fri, 27 Sep 2019 11:30:36 +0200 (CEST) Received: from smtp.corp.redhat.com (int-mx02.intmail.prod.int.phx2.redhat.com [10.5.11.12]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id 18B3B3091740; Fri, 27 Sep 2019 09:30:36 +0000 (UTC) Received: from [10.36.112.41] (ovpn-112-41.ams2.redhat.com [10.36.112.41]) by smtp.corp.redhat.com (Postfix) with ESMTPS id D19B460BE2; Fri, 27 Sep 2019 09:30:33 +0000 (UTC) To: Marvin Liu , tiwei.bie@intel.com, zhihong.wang@intel.com, stephen@networkplumber.org Cc: dev@dpdk.org, stable@dpdk.org References: <20190923140511.107939-1-yong.liu@intel.com> From: Maxime Coquelin Autocrypt: addr=maxime.coquelin@redhat.com; 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Linux x86_64; rv:68.0) Gecko/20100101 Thunderbird/68.1.0 MIME-Version: 1.0 In-Reply-To: <20190923140511.107939-1-yong.liu@intel.com> Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: 7bit X-Scanned-By: MIMEDefang 2.79 on 10.5.11.12 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.5.110.41]); Fri, 27 Sep 2019 09:30:36 +0000 (UTC) Subject: Re: [dpdk-dev] [PATCH] net/virtio: fix mbuf data and pkt length mismatch X-BeenThere: dev@dpdk.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: DPDK patches and discussions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: dev-bounces@dpdk.org Sender: "dev" On 9/23/19 4:05 PM, Marvin Liu wrote: > If reserve virtio header room by function rte_pktmbuf_prepend, both > segment data length and packet length of mbuf will be increased. > Data length will be equal to descriptor length, while packet length > should be decreased as virtio-net header won't be taken into packet. > Thus will cause mismatch in mbuf structure. Fix this issue by access > mbuf data directly and increase descriptor length if it is needed. > > Fixes: 58169a9c8153 ("net/virtio: support Tx checksum offload") > Fixes: 892dc798fa9c ("net/virtio: implement Tx path for packed queues") > Fixes: 4905ed3a523f ("net/virtio: optimize Tx enqueue for packed ring") > Fixes: e5f456a98d3c ("net/virtio: support in-order Rx and Tx") > Cc: stable@dpdk.org > > Reported-by: Stephen Hemminger > Signed-off-by: Marvin Liu Reviewed-by: Maxime Coquelin Thanks, Maxime