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i40e: add support for bpf_xdp_metadata_rx_vlan_tag()

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Introduce i40e_xdp_rx_vlan_tag() which takes the same approach as
i40e_process_skb_fields() to extract the VLAN tag from the RX
descriptor.

Tested with X710 adapter using xdp_hw_metadata, and confirmed that VLAN
tags match between bpf_xdp_metadata_rx_vlan_tag() and
skb->vlan_proto/vlan_tci.

Signed-off-by: Kohei Enju <kohei@enjuk.jp>
Reviewed-by: Aleksandr Loktionov <aleksandr.loktionov@intel.com>
Tested-by: Patryk Holda <patryk.holda@intel.com>
Signed-off-by: Tony Nguyen <anthony.l.nguyen@intel.com>
This commit is contained in:
Kohei Enju 2026-03-19 17:16:44 +00:00 committed by Tony Nguyen
parent cff6f1378d
commit bbcaa1fe87
1 changed files with 19 additions and 0 deletions
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19
drivers/net/ethernet/intel/i40e/i40e_main.c
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@ -13607,8 +13607,27 @@ static int i40e_xdp_rx_hash(const struct xdp_md *_ctx, u32 *hash,
return 0;
}
static int i40e_xdp_rx_vlan_tag(const struct xdp_md *_ctx, __be16 *vlan_proto,
u16 *vlan_tci)
{
const struct i40e_xdp_buff *ctx = (const void *)_ctx;
const union i40e_rx_desc *desc = ctx->desc;
u64 status;
status = le64_to_cpu(desc->wb.qword1.status_error_len);
if (!(status & BIT(I40E_RX_DESC_STATUS_L2TAG1P_SHIFT)))
return -ENODATA;
*vlan_proto = cpu_to_be16(ETH_P_8021Q);
*vlan_tci = le16_to_cpu(desc->wb.qword0.lo_dword.l2tag1);
return 0;
}
static const struct xdp_metadata_ops i40e_xdp_metadata_ops = {
.xmo_rx_hash = i40e_xdp_rx_hash,
.xmo_rx_vlan_tag = i40e_xdp_rx_vlan_tag,
};
static const struct net_device_ops i40e_netdev_ops = {