[PATCH bpf-next v4 2/6] net: veth: Add xmo_rx_checksum callback to veth driver
From: Vladimir Vdovin <hidden>
Date: 2026-07-08 20:35:02
Also in:
bpf, intel-wired-lan, linux-kselftest
Subsystem:
networking drivers, the rest · Maintainers:
Andrew Lunn, "David S. Miller", Eric Dumazet, Jakub Kicinski, Paolo Abeni, Linus Torvalds
From: Lorenzo Bianconi <lorenzo@kernel.org> Implement xmo_rx_checksum callback in veth driver to report RX checksum result to the eBPF program bounded to the veth device. Signed-off-by: Lorenzo Bianconi <lorenzo@kernel.org> Signed-off-by: Vladimir Vdovin <redacted> --- drivers/net/veth.c | 32 ++++++++++++++++++++++++++++++++ 1 file changed, 32 insertions(+)
diff --git a/drivers/net/veth.c b/drivers/net/veth.c
index 1c5142149175..498d894d043d 100644
--- a/drivers/net/veth.c
+++ b/drivers/net/veth.c@@ -1700,6 +1700,37 @@ static int veth_xdp_rx_vlan_tag(const struct xdp_md *ctx, __be16 *vlan_proto, return err; } +static int veth_xdp_rx_checksum(const struct xdp_md *ctx, + enum xdp_checksum *ip_summed, + u32 *cksum, u8 *cksum_level) +{ + const struct veth_xdp_buff *_ctx = (void *)ctx; + const struct sk_buff *skb = _ctx->skb; + + if (!skb) + return -ENODATA; + + switch (skb->ip_summed) { + case CHECKSUM_COMPLETE: + *ip_summed = XDP_CHECKSUM_COMPLETE; + *cksum = skb->csum; + *cksum_level = 0; + break; + case CHECKSUM_UNNECESSARY: + *ip_summed = XDP_CHECKSUM_UNNECESSARY; + *cksum_level = skb->csum_level; + *cksum = 0; + break; + default: + *ip_summed = XDP_CHECKSUM_NONE; + *cksum_level = 0; + *cksum = 0; + break; + } + + return 0; +} + static const struct net_device_ops veth_netdev_ops = { .ndo_init = veth_dev_init, .ndo_open = veth_open,
@@ -1725,6 +1756,7 @@ static const struct xdp_metadata_ops veth_xdp_metadata_ops = { .xmo_rx_timestamp = veth_xdp_rx_timestamp, .xmo_rx_hash = veth_xdp_rx_hash, .xmo_rx_vlan_tag = veth_xdp_rx_vlan_tag, + .xmo_rx_checksum = veth_xdp_rx_checksum, }; #define VETH_FEATURES (NETIF_F_SG | NETIF_F_FRAGLIST | NETIF_F_HW_CSUM | \
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2.47.0