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[IPV4]: add the UdpSndbufErrors and UdpRcvbufErrors MIBs 

Signed-off-by: Martin Bligh <mbligh@google.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
This commit is contained in:
Martin Bligh 2006-08-14 23:57:10 -07:00 committed by David S. Miller
parent 2aa7f36cdb
commit 81aa646cc4
3 changed files with 19 additions and 1 deletions
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2
include/linux/snmp.h
View File

@ -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
};

2
net/ipv4/proc.c
View File

@ -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
};

16
net/ipv4/udp.c
View File

@ -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;