static void gve_rx_skb_csum()

in google/gve/gve_rx_dqo.c [380:412]

• 27 lines of code
• 12 McCabe index (conditional complexity)

static void gve_rx_skb_csum(struct sk_buff *skb,
			    const struct gve_rx_compl_desc_dqo *desc,
			    struct gve_ptype ptype)
{
	skb->ip_summed = CHECKSUM_NONE;

	/* HW did not identify and process L3 and L4 headers. */
	if (unlikely(!desc->l3_l4_processed))
		return;

	if (ptype.l3_type == GVE_L3_TYPE_IPV4) {
		if (unlikely(desc->csum_ip_err || desc->csum_external_ip_err))
			return;
	} else if (ptype.l3_type == GVE_L3_TYPE_IPV6) {
		/* Checksum should be skipped if this flag is set. */
		if (unlikely(desc->ipv6_ex_add))
			return;
	}

	if (unlikely(desc->csum_l4_err))
		return;

	switch (ptype.l4_type) {
	case GVE_L4_TYPE_TCP:
	case GVE_L4_TYPE_UDP:
	case GVE_L4_TYPE_ICMP:
	case GVE_L4_TYPE_SCTP:
		skb->ip_summed = CHECKSUM_UNNECESSARY;
		break;
	default:
		break;
	}
}