diff options
| -rw-r--r-- | net/ipv4/udp_offload.c | 37 |
1 files changed, 18 insertions, 19 deletions
diff --git a/net/ipv4/udp_offload.c b/net/ipv4/udp_offload.c index 86687f58d613..9e4816fc9927 100644 --- a/net/ipv4/udp_offload.c +++ b/net/ipv4/udp_offload.c @@ -33,16 +33,13 @@ static struct sk_buff *__skb_udp_tunnel_segment(struct sk_buff *skb, __be16 new_protocol, bool is_ipv6) { struct sk_buff *segs = ERR_PTR(-EINVAL); + bool remcsum, need_csum, offload_csum; u16 mac_offset = skb->mac_header; int mac_len = skb->mac_len; int tnl_hlen = skb_inner_mac_header(skb) - skb_transport_header(skb); __be16 protocol = skb->protocol; int udp_offset, outer_hlen; unsigned int oldlen; - bool need_csum = !!(skb_shinfo(skb)->gso_type & - SKB_GSO_UDP_TUNNEL_CSUM); - bool remcsum = !!(skb_shinfo(skb)->gso_type & SKB_GSO_TUNNEL_REMCSUM); - bool offload_csum = false, dont_encap = (need_csum || remcsum); oldlen = (u16)~skb->len; @@ -55,14 +52,18 @@ static struct sk_buff *__skb_udp_tunnel_segment(struct sk_buff *skb, skb_set_network_header(skb, skb_inner_network_offset(skb)); skb->mac_len = skb_inner_network_offset(skb); skb->protocol = new_protocol; + + need_csum = !!(skb_shinfo(skb)->gso_type & SKB_GSO_UDP_TUNNEL_CSUM); skb->encap_hdr_csum = need_csum; + + remcsum = !!(skb_shinfo(skb)->gso_type & SKB_GSO_TUNNEL_REMCSUM); skb->remcsum_offload = remcsum; /* Try to offload checksum if possible */ offload_csum = !!(need_csum && - ((skb->dev->features & NETIF_F_HW_CSUM) || - (skb->dev->features & (is_ipv6 ? - NETIF_F_IPV6_CSUM : NETIF_F_IP_CSUM)))); + (skb->dev->features & + (is_ipv6 ? (NETIF_F_HW_CSUM | NETIF_F_IPV6_CSUM) : + (NETIF_F_HW_CSUM | NETIF_F_IP_CSUM)))); features &= skb->dev->hw_enc_features; @@ -92,13 +93,11 @@ static struct sk_buff *__skb_udp_tunnel_segment(struct sk_buff *skb, int len; __be32 delta; - if (dont_encap) { - skb->encapsulation = 0; + if (remcsum) skb->ip_summed = CHECKSUM_NONE; - } else { - /* Only set up inner headers if we might be offloading - * inner checksum. - */ + + /* Set up inner headers if we are offloading inner checksum */ + if (skb->ip_summed == CHECKSUM_PARTIAL) { skb_reset_inner_headers(skb); skb->encapsulation = 1; } @@ -122,15 +121,15 @@ static struct sk_buff *__skb_udp_tunnel_segment(struct sk_buff *skb, uh->check = ~csum_fold((__force __wsum) ((__force u32)uh->check + (__force u32)delta)); - if (offload_csum) { - skb->ip_summed = CHECKSUM_PARTIAL; - skb->csum_start = skb_transport_header(skb) - skb->head; - skb->csum_offset = offsetof(struct udphdr, check); - } else { - uh->check = gso_make_checksum(skb, ~uh->check); + if (skb->encapsulation || !offload_csum) { + uh->check = gso_make_checksum(skb, ~uh->check); if (uh->check == 0) uh->check = CSUM_MANGLED_0; + } else { + skb->ip_summed = CHECKSUM_PARTIAL; + skb->csum_start = skb_transport_header(skb) - skb->head; + skb->csum_offset = offsetof(struct udphdr, check); } } while ((skb = skb->next)); out: |