Implement xmo_rx_checksum callback in veth driver to report RX checksum result to the eBPF program bounded to the veth device.
Reviewed-by: Aleksandr Loktionov <[email protected]> Signed-off-by: Lorenzo Bianconi <[email protected]> --- drivers/net/veth.c | 32 ++++++++++++++++++++++++++++++++ 1 file changed, 32 insertions(+) diff --git a/drivers/net/veth.c b/drivers/net/veth.c index 8170bf33ccf9..dbf30089581c 100644 --- a/drivers/net/veth.c +++ b/drivers/net/veth.c @@ -1701,6 +1701,37 @@ 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, @@ -1726,6 +1757,7 @@ 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 | \ -- 2.55.0
