void xfrm6_local_error(struct sk_buff *skb, u32 mtu)
{
struct flowi6 fl6;
const struct ipv6hdr *hdr;
struct sock *sk = skb->sk;
hdr = skb->encapsulation ? inner_ipv6_hdr(skb) : ipv6_hdr(skb);
fl6.fl6_dport = inet_sk(sk)->inet_dport;
fl6.daddr = hdr->daddr;
ipv6_local_error(sk, EMSGSIZE, &fl6, mtu);
}
/**
* nfp_net_tx_csum() - Set TX CSUM offload flags in TX descriptor
* @nn: NFP Net device
* @r_vec: per-ring structure
* @txbuf: Pointer to driver soft TX descriptor
* @txd: Pointer to TX descriptor
* @skb: Pointer to SKB
*
* This function sets the TX checksum flags in the TX descriptor based
* on the configuration and the protocol of the packet to be transmitted.
*/
static void nfp_net_tx_csum(struct nfp_net *nn, struct nfp_net_r_vector *r_vec,
struct nfp_net_tx_buf *txbuf,
struct nfp_net_tx_desc *txd, struct sk_buff *skb)
{
struct ipv6hdr *ipv6h;
struct iphdr *iph;
u8 l4_hdr;
if (!(nn->ctrl & NFP_NET_CFG_CTRL_TXCSUM))
return;
if (skb->ip_summed != CHECKSUM_PARTIAL)
return;
txd->flags |= PCIE_DESC_TX_CSUM;
if (skb->encapsulation)
txd->flags |= PCIE_DESC_TX_ENCAP;
iph = skb->encapsulation ? inner_ip_hdr(skb) : ip_hdr(skb);
ipv6h = skb->encapsulation ? inner_ipv6_hdr(skb) : ipv6_hdr(skb);
if (iph->version == 4) {
txd->flags |= PCIE_DESC_TX_IP4_CSUM;
l4_hdr = iph->protocol;
} else if (ipv6h->version == 6) {
l4_hdr = ipv6h->nexthdr;
} else {
nn_warn_ratelimit(nn, "partial checksum but ipv=%x!\n",
iph->version);
return;
}
switch (l4_hdr) {
case IPPROTO_TCP:
txd->flags |= PCIE_DESC_TX_TCP_CSUM;
break;
case IPPROTO_UDP:
txd->flags |= PCIE_DESC_TX_UDP_CSUM;
break;
default:
nn_warn_ratelimit(nn, "partial checksum but l4 proto=%x!\n",
l4_hdr);
return;
}
u64_stats_update_begin(&r_vec->tx_sync);
if (skb->encapsulation)
r_vec->hw_csum_tx_inner += txbuf->pkt_cnt;
else
r_vec->hw_csum_tx += txbuf->pkt_cnt;
u64_stats_update_end(&r_vec->tx_sync);
}