diff options
Diffstat (limited to 'include/net/udp.h')
| -rw-r--r-- | include/net/udp.h | 14 |
1 files changed, 12 insertions, 2 deletions
diff --git a/include/net/udp.h b/include/net/udp.h index 79d141d2103b..e55d5f765807 100644 --- a/include/net/udp.h +++ b/include/net/udp.h @@ -167,7 +167,7 @@ typedef struct sock *(*udp_lookup_t)(struct sk_buff *skb, __be16 sport, __be16 dport); struct sk_buff *udp_gro_receive(struct list_head *head, struct sk_buff *skb, - struct udphdr *uh, udp_lookup_t lookup); + struct udphdr *uh, struct sock *sk); int udp_gro_complete(struct sk_buff *skb, int nhoff, udp_lookup_t lookup); struct sk_buff *__udp_gso_segment(struct sk_buff *gso_skb, @@ -476,11 +476,21 @@ static inline struct sk_buff *udp_rcv_segment(struct sock *sk, if (!inet_get_convert_csum(sk)) features |= NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM; + /* UDP segmentation expects packets of type CHECKSUM_PARTIAL or + * CHECKSUM_NONE in __udp_gso_segment. UDP GRO indeed builds partial + * packets in udp_gro_complete_segment. As does UDP GSO, verified by + * udp_send_skb. But when those packets are looped in dev_loopback_xmit + * their ip_summed is set to CHECKSUM_UNNECESSARY. Reset in this + * specific case, where PARTIAL is both correct and required. + */ + if (skb->pkt_type == PACKET_LOOPBACK) + skb->ip_summed = CHECKSUM_PARTIAL; + /* the GSO CB lays after the UDP one, no need to save and restore any * CB fragment */ segs = __skb_gso_segment(skb, features, false); - if (unlikely(IS_ERR_OR_NULL(segs))) { + if (IS_ERR_OR_NULL(segs)) { int segs_nr = skb_shinfo(skb)->gso_segs; atomic_add(segs_nr, &sk->sk_drops); |
