udp: Add MIB counters for rcvbuferrors

Add MIB counters for rcvbuferrors in UDP to help diagnose problems.

Signed-off-by: James M Leddy <james.leddy@redhat.com>
Acked-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/net/ipv4/udp.c b/net/ipv4/udp.c
index d92f94b..7d5a866 100644 (file)
--- a/net/ipv4/udp.c
+++ b/net/ipv4/udp.c
@@ -1588,8 +1588,11 @@ int udp_queue_rcv_skb(struct sock *sk, struct sk_buff *skb)
                goto csum_error;
 
 
-       if (sk_rcvqueues_full(sk, skb, sk->sk_rcvbuf))
+       if (sk_rcvqueues_full(sk, skb, sk->sk_rcvbuf)) {
+               UDP_INC_STATS_BH(sock_net(sk), UDP_MIB_RCVBUFERRORS,
+                                is_udplite);
                goto drop;
+       }
 
        rc = 0;
 

diff --git a/net/ipv6/udp.c b/net/ipv6/udp.c
index 95c8347..7092ff7 100644 (file)
--- a/net/ipv6/udp.c
+++ b/net/ipv6/udp.c
@@ -674,8 +674,11 @@ int udpv6_queue_rcv_skb(struct sock *sk, struct sk_buff *skb)
                        goto csum_error;
        }
 
-       if (sk_rcvqueues_full(sk, skb, sk->sk_rcvbuf))
+       if (sk_rcvqueues_full(sk, skb, sk->sk_rcvbuf)) {
+               UDP6_INC_STATS_BH(sock_net(sk),
+                                 UDP_MIB_RCVBUFERRORS, is_udplite);
                goto drop;
+       }
 
        skb_dst_drop(skb);
 
@@ -690,6 +693,7 @@ int udpv6_queue_rcv_skb(struct sock *sk, struct sk_buff *skb)
        bh_unlock_sock(sk);
 
        return rc;
+
 csum_error:
        UDP6_INC_STATS_BH(sock_net(sk), UDP_MIB_CSUMERRORS, is_udplite);
 drop: