Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S941074AbcLWOk5 (ORCPT ); Fri, 23 Dec 2016 09:40:57 -0500 Received: from mx1.redhat.com ([209.132.183.28]:39388 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1764224AbcLWOiZ (ORCPT ); Fri, 23 Dec 2016 09:38:25 -0500 From: Jason Wang To: mst@redhat.com, virtualization@lists.linux-foundation.org, netdev@vger.kernel.org, linux-kernel@vger.kernel.org Cc: john.r.fastabend@intel.com, Jason Wang Subject: [PATCH net 5/9] virtio-net: unbreak csumed packets for XDP_PASS Date: Fri, 23 Dec 2016 22:37:28 +0800 Message-Id: <1482503852-12438-6-git-send-email-jasowang@redhat.com> In-Reply-To: <1482503852-12438-1-git-send-email-jasowang@redhat.com> References: <1482503852-12438-1-git-send-email-jasowang@redhat.com> X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.5.110.30]); Fri, 23 Dec 2016 14:38:05 +0000 (UTC) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1229 Lines: 34 We drop csumed packet when do XDP for packets. This breaks XDP_PASS when GUEST_CSUM is supported. Fix this by allowing csum flag to be set. With this patch, simple TCP works for XDP_PASS. Cc: John Fastabend Signed-off-by: Jason Wang --- drivers/net/virtio_net.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/drivers/net/virtio_net.c b/drivers/net/virtio_net.c index 470293e..0778dc8 100644 --- a/drivers/net/virtio_net.c +++ b/drivers/net/virtio_net.c @@ -440,7 +440,7 @@ static struct sk_buff *receive_big(struct net_device *dev, struct virtio_net_hdr_mrg_rxbuf *hdr = buf; u32 act; - if (unlikely(hdr->hdr.gso_type || hdr->hdr.flags)) + if (unlikely(hdr->hdr.gso_type)) goto err_xdp; act = do_xdp_prog(vi, rq, xdp_prog, page, 0, len); switch (act) { @@ -572,7 +572,7 @@ static struct sk_buff *receive_mergeable(struct net_device *dev, * the receive path after XDP is loaded. In practice I * was not able to create this condition. */ - if (unlikely(hdr->hdr.gso_type || hdr->hdr.flags)) + if (unlikely(hdr->hdr.gso_type)) goto err_xdp; act = do_xdp_prog(vi, rq, xdp_prog, xdp_page, offset, len); -- 2.7.4