[IPv6] SNMP: Increment OutNoRoutes when connecting to unreachable network

IPv6 stack doesn't increment OutNoRoutes counter when IP datagrams
is being discarded because no route could be found to transmit them
to their destination. IPv6 stack should increment the counter.
Incidentally, IPv4 stack increments that counter in such situation.

Signed-off-by: Mitsuru Chinen <mitch@linux.vnet.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 2 insertions, 0 deletions

diff --git a/net/ipv6/ip6_output.c b/net/ipv6/ip6_output.c
index 86e1835ce4e4..6338a9c1aa14 100644
--- a/net/ipv6/ip6_output.c
+++ b/net/ipv6/ip6_output.c
@@ -933,6 +933,8 @@ static int ip6_dst_lookup_tail(struct sock *sk,
         return 0;
 
 out_err_release:
+        if (err == -ENETUNREACH)
+                IP6_INC_STATS_BH(NULL, IPSTATS_MIB_OUTNOROUTES);
         dst_release(*dst);
         *dst = NULL;
         return err;