ipv6: Add disable_ipv6 sysctl to disable IPv6 operaion on specific interface.

Signed-off-by: YOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org>

1 files changed, 2 insertions, 1 deletions

diff --git a/net/ipv6/ip6_input.c b/net/ipv6/ip6_input.c
index 34e5a96623ae..ea81c614dde2 100644
--- a/net/ipv6/ip6_input.c
+++ b/net/ipv6/ip6_input.c
@@ -71,7 +71,8 @@ int ipv6_rcv(struct sk_buff *skb, struct net_device *dev, struct packet_type *pt
 
         IP6_INC_STATS_BH(idev, IPSTATS_MIB_INRECEIVES);
 
-        if ((skb = skb_share_check(skb, GFP_ATOMIC)) == NULL) {
+        if ((skb = skb_share_check(skb, GFP_ATOMIC)) == NULL ||
+            !idev || unlikely(idev->cnf.disable_ipv6)) {
                 IP6_INC_STATS_BH(idev, IPSTATS_MIB_INDISCARDS);
                 rcu_read_unlock();
                 goto out;