icmp: Account for ICMP out errors
When ip_append() fails because of socket limit or memory shortage,
increment ICMP_MIB_OUTERRORS counter, so that "netstat -s" can report
these errors.
LANG=C netstat -s | grep "ICMP messages failed"
0 ICMP messages failed
For IPV6, implement ICMP6_MIB_OUTERRORS counter as well.
# grep Icmp6OutErrors /proc/net/dev_snmp6/*
/proc/net/dev_snmp6/eth0:Icmp6OutErrors 0
/proc/net/dev_snmp6/lo:Icmp6OutErrors 0
Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/include/linux/snmp.h b/include/linux/snmp.h
index d2a9aa3..5279771 100644
--- a/include/linux/snmp.h
+++ b/include/linux/snmp.h
@@ -100,6 +100,7 @@
ICMP6_MIB_INMSGS, /* InMsgs */
ICMP6_MIB_INERRORS, /* InErrors */
ICMP6_MIB_OUTMSGS, /* OutMsgs */
+ ICMP6_MIB_OUTERRORS, /* OutErrors */
__ICMP6_MIB_MAX
};