[PATCH dpdk v3] net: fix VLAN packet type

[Robin Jarry]

Kevin Traynor, Apr 23, 2026 at 11:19:
> Not shown in diff, but for:
>
> 		pkt_type |=
> 			proto == rte_cpu_to_be_16(RTE_ETHER_TYPE_VLAN) ?
> 				 RTE_PTYPE_L2_ETHER_VLAN :
> 				 RTE_PTYPE_L2_ETHER_QINQ;
>
> It seems to be produce the right result, but I'm not sure we should be
> treating the ptype L2 defines as bitmasks. Maybe I'm wrong and it was
> planned, but it looks like a coincidence it works now because QINQ (0x7)
> happens to be a superset of VLAN (0x6) for the OR.
>
> Perhaps you could check vlan_depth and assign VLAN or QINQ based on that?

I hadn't considered this. It would make sense to have something like:

l3:
	switch (vlan_depth) {
	case 0:
		pkt_type = RTE_PTYPE_L2_ETHER;
		break;
	case 1:
		pkt_type = RTE_PTYPE_L2_ETHER_VLAN;
		break;
	default:
		pkt_type = RTE_PTYPE_L2_ETHER_QINQ;
		break;
	}

Mind that this will report RTE_PTYPE_L2_ETHER_QINQ even if we have
double stacked 802.1Q tags (ether type 0x8100) and no 802.1ad S-tag
(QinQ 0x88A8). I don't think this is an issue, but I'll let you judge.

I can send a v4 with this if that suits you.