diff options
| -rw-r--r-- | include/linux/snmp.h | 2 | ||||
| -rw-r--r-- | net/ipv4/proc.c | 2 | ||||
| -rw-r--r-- | net/ipv4/udp.c | 16 |
3 files changed, 19 insertions, 1 deletions
diff --git a/include/linux/snmp.h b/include/linux/snmp.h index 4db25d5c7cd1..30156556f78d 100644 --- a/include/linux/snmp.h +++ b/include/linux/snmp.h @@ -155,6 +155,8 @@ enum UDP_MIB_NOPORTS, /* NoPorts */ UDP_MIB_INERRORS, /* InErrors */ UDP_MIB_OUTDATAGRAMS, /* OutDatagrams */ + UDP_MIB_RCVBUFERRORS, /* RcvbufErrors */ + UDP_MIB_SNDBUFERRORS, /* SndbufErrors */ __UDP_MIB_MAX }; diff --git a/net/ipv4/proc.c b/net/ipv4/proc.c index d61e2a9d394d..9c6cbe3d9fb8 100644 --- a/net/ipv4/proc.c +++ b/net/ipv4/proc.c @@ -173,6 +173,8 @@ static const struct snmp_mib snmp4_udp_list[] = { SNMP_MIB_ITEM("NoPorts", UDP_MIB_NOPORTS), SNMP_MIB_ITEM("InErrors", UDP_MIB_INERRORS), SNMP_MIB_ITEM("OutDatagrams", UDP_MIB_OUTDATAGRAMS), + SNMP_MIB_ITEM("RcvbufErrors", UDP_MIB_RCVBUFERRORS), + SNMP_MIB_ITEM("SndbufErrors", UDP_MIB_SNDBUFERRORS), SNMP_MIB_SENTINEL }; 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; |