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| author | Martin Bligh <mbligh@google.com> | 2006-08-14 23:57:10 -0700 |
|---|---|---|
| committer | David S. Miller <davem@sunset.davemloft.net> | 2006-09-22 14:54:41 -0700 |
| commit | 81aa646cc4df3779bcbf9d18cc2c0813ee9b3262 (patch) | |
| tree | 7cf11f1e09f83b97a36012c187231504c4654199 /net/ipv4/udp.c | |
| parent | 2aa7f36cdb332a32849afbf25fcbf35dce5b1940 (diff) | |
| download | lwn-81aa646cc4df3779bcbf9d18cc2c0813ee9b3262.tar.gz lwn-81aa646cc4df3779bcbf9d18cc2c0813ee9b3262.zip | |
[IPV4]: add the UdpSndbufErrors and UdpRcvbufErrors MIBs
Signed-off-by: Martin Bligh <mbligh@google.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Diffstat (limited to 'net/ipv4/udp.c')
| -rw-r--r-- | net/ipv4/udp.c | 16 |
1 files changed, 15 insertions, 1 deletions
diff --git a/net/ipv4/udp.c b/net/ipv4/udp.c index 87152510980c..514c1e9ae810 100644 --- a/net/ipv4/udp.c +++ b/net/ipv4/udp.c @@ -662,6 +662,16 @@ out: UDP_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: @@ -981,6 +991,7 @@ static int udp_encap_rcv(struct sock * sk, struct sk_buff *skb) static int udp_queue_rcv_skb(struct sock * sk, struct sk_buff *skb) { struct udp_sock *up = udp_sk(sk); + int rc; /* * Charge it to the socket, dropping if the queue is full. @@ -1027,7 +1038,10 @@ static int udp_queue_rcv_skb(struct sock * sk, struct sk_buff *skb) skb->ip_summed = CHECKSUM_UNNECESSARY; } - 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); UDP_INC_STATS_BH(UDP_MIB_INERRORS); kfree_skb(skb); return -1; |