Thread (70 messages) 70 messages, 4 authors, 2023-09-18

Re: [RFC bpf-next 11/23] ice: use VLAN proto from ring packet context in skb path

From: Larysa Zaremba <hidden>
Date: 2023-09-14 16:36:18
Also in: bpf

On Thu, Sep 14, 2023 at 06:30:32PM +0200, Alexander Lobakin wrote:
From: Larysa Zaremba <redacted>
Date: Thu, 24 Aug 2023 21:26:50 +0200
quoted
VLAN proto, used in ice XDP hints implementation is stored in ring packet
context. Utilize this value in skb VLAN processing too instead of checking
netdev features.

At the same time, use vlan_tci instead of vlan_tag in touched code,
because vlan_tag is misleading.
[...]
quoted
 void
-ice_receive_skb(struct ice_rx_ring *rx_ring, struct sk_buff *skb, u16 vlan_tag)
+ice_receive_skb(struct ice_rx_ring *rx_ring, struct sk_buff *skb, u16 vlan_tci)
 {
-	netdev_features_t features = rx_ring->netdev->features;
-	bool non_zero_vlan = !!(vlan_tag & VLAN_VID_MASK);
-
-	if ((features & NETIF_F_HW_VLAN_CTAG_RX) && non_zero_vlan)
-		__vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), vlan_tag);
-	else if ((features & NETIF_F_HW_VLAN_STAG_RX) && non_zero_vlan)
-		__vlan_hwaccel_put_tag(skb, htons(ETH_P_8021AD), vlan_tag);
+	if (vlan_tci & VLAN_VID_MASK && rx_ring->pkt_ctx.vlan_proto)
I'd wrap the first expression into ()s to make it more readable (and no
questions like "shouldn't these be three &&?").
OK
 
quoted
+		__vlan_hwaccel_put_tag(skb, rx_ring->pkt_ctx.vlan_proto,
+				       vlan_tci);
 
 	napi_gro_receive(&rx_ring->q_vector->napi, skb);
 }
[...]

Thanks,
Olek
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