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-rw-r--r--include/net/udp.h30
1 files changed, 28 insertions, 2 deletions
diff --git a/include/net/udp.h b/include/net/udp.h
index a132a02b2f2c..360df454356c 100644
--- a/include/net/udp.h
+++ b/include/net/udp.h
@@ -329,6 +329,8 @@ struct sock *__udp6_lib_lookup(struct net *net,
struct sk_buff *skb);
struct sock *udp6_lib_lookup_skb(const struct sk_buff *skb,
__be16 sport, __be16 dport);
+int udp_read_sock(struct sock *sk, read_descriptor_t *desc,
+ sk_read_actor_t recv_actor);
/* UDP uses skb->dev_scratch to cache as much information as possible and avoid
* possibly multiple cache miss on dequeue()
@@ -515,9 +517,33 @@ static inline struct sk_buff *udp_rcv_segment(struct sock *sk,
return segs;
}
-#ifdef CONFIG_BPF_STREAM_PARSER
+static inline void udp_post_segment_fix_csum(struct sk_buff *skb)
+{
+ /* UDP-lite can't land here - no GRO */
+ WARN_ON_ONCE(UDP_SKB_CB(skb)->partial_cov);
+
+ /* UDP packets generated with UDP_SEGMENT and traversing:
+ *
+ * UDP tunnel(xmit) -> veth (segmentation) -> veth (gro) -> UDP tunnel (rx)
+ *
+ * can reach an UDP socket with CHECKSUM_NONE, because
+ * __iptunnel_pull_header() converts CHECKSUM_PARTIAL into NONE.
+ * SKB_GSO_UDP_L4 or SKB_GSO_FRAGLIST packets with no UDP tunnel will
+ * have a valid checksum, as the GRO engine validates the UDP csum
+ * before the aggregation and nobody strips such info in between.
+ * Instead of adding another check in the tunnel fastpath, we can force
+ * a valid csum after the segmentation.
+ * Additionally fixup the UDP CB.
+ */
+ UDP_SKB_CB(skb)->cscov = skb->len;
+ if (skb->ip_summed == CHECKSUM_NONE && !skb->csum_valid)
+ skb->csum_valid = 1;
+}
+
+#ifdef CONFIG_BPF_SYSCALL
struct sk_psock;
struct proto *udp_bpf_get_proto(struct sock *sk, struct sk_psock *psock);
-#endif /* BPF_STREAM_PARSER */
+int udp_bpf_update_proto(struct sock *sk, struct sk_psock *psock, bool restore);
+#endif
#endif /* _UDP_H */