From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mga02.intel.com (mga02.intel.com [134.134.136.20]) by dpdk.org (Postfix) with ESMTP id 3444A8E59 for ; Tue, 12 Jan 2016 07:58:18 +0100 (CET) Received: from fmsmga003.fm.intel.com ([10.253.24.29]) by orsmga101.jf.intel.com with ESMTP; 11 Jan 2016 22:58:19 -0800 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.20,556,1444719600"; d="scan'208";a="632043197" Received: from yliu-dev.sh.intel.com ([10.239.66.49]) by FMSMGA003.fm.intel.com with ESMTP; 11 Jan 2016 22:58:16 -0800 From: Yuanhan Liu To: dev@dpdk.org Date: Tue, 12 Jan 2016 14:59:02 +0800 Message-Id: <1452581944-24838-6-git-send-email-yuanhan.liu@linux.intel.com> X-Mailer: git-send-email 1.9.0 In-Reply-To: <1452581944-24838-1-git-send-email-yuanhan.liu@linux.intel.com> References: <1449719650-3482-1-git-send-email-yuanhan.liu@linux.intel.com> <1452581944-24838-1-git-send-email-yuanhan.liu@linux.intel.com> Cc: "Michael S. Tsirkin" Subject: [dpdk-dev] [PATCH v2 5/7] virtio: retrieve hdr_size from hw->vtnet_hdr_size X-BeenThere: dev@dpdk.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: patches and discussions about DPDK List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 12 Jan 2016 06:58:18 -0000 The mergeable virtio net hdr format has been the standard and the only virtio net hdr format since virtio 1.0. Therefore, we could not hardcode hdr_size to "sizeof(struct virtio_net_hdr)" any more at virtio_recv_pkts(), otherwise, there would be a mismatch of hdr size from rte_vhost_enqueue_burst() and virtio_recv_pkts(), leading a packet corruption. Instead, we should retrieve it from hw->vtnet_hdr_size; we will do proper settings at eth_virtio_dev_init(). Signed-off-by: Yuanhan Liu --- drivers/net/virtio/virtio_rxtx.c | 6 ++++-- 1 file changed, 4 insertions(+), 2 deletions(-) diff --git a/drivers/net/virtio/virtio_rxtx.c b/drivers/net/virtio/virtio_rxtx.c index b7267c0..41a1366 100644 --- a/drivers/net/virtio/virtio_rxtx.c +++ b/drivers/net/virtio/virtio_rxtx.c @@ -560,7 +560,7 @@ virtio_recv_pkts(void *rx_queue, struct rte_mbuf **rx_pkts, uint16_t nb_pkts) struct rte_mbuf *rcv_pkts[VIRTIO_MBUF_BURST_SZ]; int error; uint32_t i, nb_enqueued; - const uint32_t hdr_size = sizeof(struct virtio_net_hdr); + uint32_t hdr_size; nb_used = VIRTQUEUE_NUSED(rxvq); @@ -580,6 +580,7 @@ virtio_recv_pkts(void *rx_queue, struct rte_mbuf **rx_pkts, uint16_t nb_pkts) hw = rxvq->hw; nb_rx = 0; nb_enqueued = 0; + hdr_size = hw->vtnet_hdr_size; for (i = 0; i < num ; i++) { rxm = rcv_pkts[i]; @@ -664,7 +665,7 @@ virtio_recv_mergeable_pkts(void *rx_queue, uint32_t seg_num; uint16_t extra_idx; uint32_t seg_res; - const uint32_t hdr_size = sizeof(struct virtio_net_hdr_mrg_rxbuf); + uint32_t hdr_size; nb_used = VIRTQUEUE_NUSED(rxvq); @@ -682,6 +683,7 @@ virtio_recv_mergeable_pkts(void *rx_queue, seg_num = 0; extra_idx = 0; seg_res = 0; + hdr_size = hw->vtnet_hdr_size; while (i < nb_used) { struct virtio_net_hdr_mrg_rxbuf *header; -- 1.9.0