From: huangxuesen <huangxuesen@xxxxxxxxxxxx> When pushing vxlan tunnel header, set inner protocol as ETH_P_TEB in skb to avoid HW device disabling udp tunnel segmentation offload, just like vxlan_build_skb does. Drivers for NIC may invoke vxlan_features_check to check the inner_protocol in skb for vxlan packets to decide whether to disable NETIF_F_GSO_MASK. Currently it sets inner_protocol as the original skb->protocol, that will make mlx5_core disable TSO and lead to huge performance degradation. Signed-off-by: huangxuesen <huangxuesen@xxxxxxxxxxxx> Signed-off-by: chengzhiyong <chengzhiyong@xxxxxxxxxxxx> Signed-off-by: wangli <wangli09@xxxxxxxxxxxx> --- net/core/filter.c | 7 ++++++- 1 file changed, 6 insertions(+), 1 deletion(-) diff --git a/net/core/filter.c b/net/core/filter.c index 255aeee72402..f8d3ba3fe10f 100644 --- a/net/core/filter.c +++ b/net/core/filter.c @@ -3466,7 +3466,12 @@ static int bpf_skb_net_grow(struct sk_buff *skb, u32 off, u32 len_diff, skb->inner_mac_header = inner_net - inner_mac_len; skb->inner_network_header = inner_net; skb->inner_transport_header = inner_trans; - skb_set_inner_protocol(skb, skb->protocol); + + if (flags & BPF_F_ADJ_ROOM_ENCAP_L4_UDP && + inner_mac_len == ETH_HLEN) + skb_set_inner_protocol(skb, htons(ETH_P_TEB)); + else + skb_set_inner_protocol(skb, skb->protocol); skb->encapsulation = 1; skb_set_network_header(skb, mac_len); -- 2.28.0
