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    Subject[PATCH 5.10 65/98] ovs: clear skb->tstamp in forwarding path
    Date
    From: "kaixi.fan" <fankaixi.li@bytedance.com>

    [ Upstream commit 01634047bf0d5c2d9b7d8095bb4de1663dbeedeb ]

    fq qdisc requires tstamp to be cleared in the forwarding path. Now ovs
    doesn't clear skb->tstamp. We encountered a problem with linux
    version 5.4.56 and ovs version 2.14.1, and packets failed to
    dequeue from qdisc when fq qdisc was attached to ovs port.

    Fixes: fb420d5d91c1 ("tcp/fq: move back to CLOCK_MONOTONIC")
    Signed-off-by: kaixi.fan <fankaixi.li@bytedance.com>
    Signed-off-by: xiexiaohui <xiexiaohui.xxh@bytedance.com>
    Reviewed-by: Cong Wang <cong.wang@bytedance.com>
    Signed-off-by: David S. Miller <davem@davemloft.net>
    Signed-off-by: Sasha Levin <sashal@kernel.org>
    ---
    net/openvswitch/vport.c | 1 +
    1 file changed, 1 insertion(+)

    diff --git a/net/openvswitch/vport.c b/net/openvswitch/vport.c
    index 82d801f063b7..1c05d4bef331 100644
    --- a/net/openvswitch/vport.c
    +++ b/net/openvswitch/vport.c
    @@ -503,6 +503,7 @@ void ovs_vport_send(struct vport *vport, struct sk_buff *skb, u8 mac_proto)
    }

    skb->dev = vport->dev;
    + skb->tstamp = 0;
    vport->ops->send(skb);
    return;

    --
    2.30.2
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