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icmp: Account for ICMP out errors

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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>
This commit is contained in:
Eric Dumazet 2010-04-03 15:09:04 -07:00 • committed by David S. Miller
parent f66ef2d064
commit 1f8438a853
4 changed files with 7 additions and 2 deletions
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1
include/linux/snmp.h
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@ -100,6 +100,7 @@ enum
ICMP6_MIB_INMSGS, /* InMsgs */
ICMP6_MIB_INERRORS, /* InErrors */
ICMP6_MIB_OUTMSGS, /* OutMsgs */
ICMP6_MIB_OUTERRORS, /* OutErrors */
__ICMP6_MIB_MAX
};