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authorWei Dong <weid@nanjing-fnst.com>2006-08-31 15:24:48 -0700
committerDavid S. Miller <davem@davemloft.net>2006-08-31 15:24:48 -0700
commit0668b47205e42c04e9c1b594573be5a822ac7f09 (patch)
treeefc844d3b50e37a0db4cc650c7b005911945e786
parent5991c84421f3ea1e281954610a39e4993e5c39e4 (diff)
downloadop-kernel-dev-0668b47205e42c04e9c1b594573be5a822ac7f09.zip
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[IPV4]: Fix SNMPv2 "ipFragFails" counter error
When I tested Linux kernel 2.6.17.7 about statistics "ipFragFails",found that this counter couldn't increase correctly. The criteria is RFC2011: RFC2011 ipFragFails OBJECT-TYPE SYNTAX Counter32 MAX-ACCESS read-only STATUS current DESCRIPTION "The number of IP datagrams that have been discarded because they needed to be fragmented at this entity but could not be, e.g., because their Don't Fragment flag was set." ::= { ip 18 } When I send big IP packet to a router with DF bit set to 1 which need to be fragmented, and router just sends an ICMP error message ICMP_FRAG_NEEDED but no increments for this counter(in the function ip_fragment). Signed-off-by: Wei Dong <weid@nanjing-fnst.com> Signed-off-by: David S. Miller <davem@davemloft.net>
-rw-r--r--net/ipv4/ip_output.c1
1 files changed, 1 insertions, 0 deletions
diff --git a/net/ipv4/ip_output.c b/net/ipv4/ip_output.c
index 4c20f55..a2ede16 100644
--- a/net/ipv4/ip_output.c
+++ b/net/ipv4/ip_output.c
@@ -440,6 +440,7 @@ int ip_fragment(struct sk_buff *skb, int (*output)(struct sk_buff*))
iph = skb->nh.iph;
if (unlikely((iph->frag_off & htons(IP_DF)) && !skb->local_df)) {
+ IP_INC_STATS(IPSTATS_MIB_FRAGFAILS);
icmp_send(skb, ICMP_DEST_UNREACH, ICMP_FRAG_NEEDED,
htonl(dst_mtu(&rt->u.dst)));
kfree_skb(skb);
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