Phonet: dropped datagrams accounting

The per-socket drop count is visible via /proc/net/phonet.

Signed-off-by: Rémi Denis-Courmont <remi.denis-courmont@nokia.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/net/phonet/datagram.c b/net/phonet/datagram.c
index e087862..ef5c75c 100644 (file)
--- a/net/phonet/datagram.c
+++ b/net/phonet/datagram.c
@@ -159,8 +159,11 @@ out_nofree:
 static int pn_backlog_rcv(struct sock *sk, struct sk_buff *skb)
 {
        int err = sock_queue_rcv_skb(sk, skb);
-       if (err < 0)
+       if (err < 0) {
                kfree_skb(skb);
+               if (err == -ENOMEM)
+                       atomic_inc(&sk->sk_drops);
+       }
        return err ? NET_RX_DROP : NET_RX_SUCCESS;
 }