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Date:   Thu, 18 Feb 2021 20:50:17 +0000
To:     Daniel Borkmann <daniel@iogearbox.net>,
        Magnus Karlsson <magnus.karlsson@intel.com>
From:   Alexander Lobakin <alobakin@pm.me>
Cc:     "Michael S. Tsirkin" <mst@redhat.com>,
        Jason Wang <jasowang@redhat.com>,
        "David S. Miller" <davem@davemloft.net>,
        Jakub Kicinski <kuba@kernel.org>,
        Jonathan Lemon <jonathan.lemon@gmail.com>,
        Alexei Starovoitov <ast@kernel.org>,
        =?utf-8?Q?Bj=C3=B6rn_T=C3=B6pel?= <bjorn@kernel.org>,
        Jesper Dangaard Brouer <hawk@kernel.org>,
        John Fastabend <john.fastabend@gmail.com>,
        Andrii Nakryiko <andrii@kernel.org>,
        Martin KaFai Lau <kafai@fb.com>,
        Song Liu <songliubraving@fb.com>, Yonghong Song <yhs@fb.com>,
        KP Singh <kpsingh@kernel.org>, Paolo Abeni <pabeni@redhat.com>,
        Eric Dumazet <eric.dumazet@gmail.com>,
        Xuan Zhuo <xuanzhuo@linux.alibaba.com>,
        Dust Li <dust.li@linux.alibaba.com>,
        Alexander Lobakin <alobakin@pm.me>,
        virtualization@lists.linux-foundation.org, netdev@vger.kernel.org,
        linux-kernel@vger.kernel.org, bpf@vger.kernel.org
Reply-To: Alexander Lobakin <alobakin@pm.me>
Subject: [PATCH v8 bpf-next 3/5] virtio-net: support IFF_TX_SKB_NO_LINEAR
Message-ID: <20210218204908.5455-4-alobakin@pm.me>
In-Reply-To: <20210218204908.5455-1-alobakin@pm.me>
References: <20210218204908.5455-1-alobakin@pm.me>
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From: Xuan Zhuo <xuanzhuo@linux.alibaba.com>

Virtio net supports the case where the skb linear space is empty, so add
priv_flags.

Signed-off-by: Xuan Zhuo <xuanzhuo@linux.alibaba.com>
Acked-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Alexander Lobakin <alobakin@pm.me>
Acked-by: John Fastabend <john.fastabend@gmail.com>
---
 drivers/net/virtio_net.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/net/virtio_net.c b/drivers/net/virtio_net.c
index ba8e63792549..f2ff6c3906c1 100644
--- a/drivers/net/virtio_net.c
+++ b/drivers/net/virtio_net.c
@@ -2972,7 +2972,8 @@ static int virtnet_probe(struct virtio_device *vdev)
 =09=09return -ENOMEM;

 =09/* Set up network device as normal. */
-=09dev->priv_flags |=3D IFF_UNICAST_FLT | IFF_LIVE_ADDR_CHANGE;
+=09dev->priv_flags |=3D IFF_UNICAST_FLT | IFF_LIVE_ADDR_CHANGE |
+=09=09=09   IFF_TX_SKB_NO_LINEAR;
 =09dev->netdev_ops =3D &virtnet_netdev;
 =09dev->features =3D NETIF_F_HIGHDMA;

--
2.30.1