Commit a18135eb authored by David S. Miller's avatar David S. Miller

[IPV6]: Add UDP_MIB_{SND,RCV}BUFERRORS handling.

Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 81aa646c
......@@ -345,6 +345,8 @@ out:
static inline int udpv6_queue_rcv_skb(struct sock * sk, struct sk_buff *skb)
{
int rc;
if (!xfrm6_policy_check(sk, XFRM_POLICY_IN, skb)) {
kfree_skb(skb);
return -1;
......@@ -356,7 +358,10 @@ static inline int udpv6_queue_rcv_skb(struct sock * sk, struct sk_buff *skb)
return 0;
}
if (sock_queue_rcv_skb(sk,skb)<0) {
if ((rc = sock_queue_rcv_skb(sk,skb)) < 0) {
/* Note that an ENOMEM error is charged twice */
if (rc == -ENOMEM)
UDP_INC_STATS_BH(UDP_MIB_RCVBUFERRORS);
UDP6_INC_STATS_BH(UDP_MIB_INERRORS);
kfree_skb(skb);
return 0;
......@@ -857,6 +862,16 @@ out:
UDP6_INC_STATS_USER(UDP_MIB_OUTDATAGRAMS);
return len;
}
/*
* ENOBUFS = no kernel mem, SOCK_NOSPACE = no sndbuf space. Reporting
* ENOBUFS might not be good (it's not tunable per se), but otherwise
* we don't have a good statistic (IpOutDiscards but it can be too many
* things). We could add another new stat but at least for now that
* seems like overkill.
*/
if (err == -ENOBUFS || test_bit(SOCK_NOSPACE, &sk->sk_socket->flags)) {
UDP_INC_STATS_USER(UDP_MIB_SNDBUFERRORS);
}
return err;
do_confirm:
......
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