netdev - [External] [PATCH] ovs: datapath: clear skb->tstamp in forwarding path

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Message-ID: <CAEEdnKGsHx5kiUm6SViYru3y8GFLjcLunoGa=0_UQrGi+i7jwg@mail.gmail.com>
Date:   Tue, 17 Aug 2021 10:25:24 +0800
From:   范开喜 <fankaixi.li@...edance.com>
To:     dev@...nvswitch.org, netdev@...r.kernel.org
Cc:     Cong Wang <xiyou.wangcong@...il.com>
Subject: [External] [PATCH] ovs: datapath: clear skb->tstamp in forwarding path

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.

Signed-off-by: kaixi.fan <fankaixi.li@...edance.com>
Signed-off-by: xiexiaohui <xiexiaohui.xxh@...edance.com>
Reviewed-by: Cong Wang <cong.wang@...edance.com>
---
 net/openvswitch/vport.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/net/openvswitch/vport.c b/net/openvswitch/vport.c
index 88deb5b41429..cf2ce5812489 100644
--- a/net/openvswitch/vport.c
+++ b/net/openvswitch/vport.c
@@ -507,6 +507,7 @@ 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;

-- 
2.20.1