diff options
| author | YOSHIFUJI Hideaki / 吉藤英明 <yoshfuji@linux-ipv6.org> | 2013-01-17 12:54:00 +0000 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2013-01-17 18:38:19 -0500 |
| commit | 6fd6ce2056de27090f4723138e0ce0a816f4ba0d (patch) | |
| tree | aaa108891bb6eefbb24b1af220cda2fab463c381 /net/ipv6/ip6_output.c | |
| parent | 707be1ff3d9309f810e33790e6ae3f15e7ac967e (diff) | |
| download | lwn-6fd6ce2056de27090f4723138e0ce0a816f4ba0d.tar.gz lwn-6fd6ce2056de27090f4723138e0ce0a816f4ba0d.zip | |
ipv6: Do not depend on rt->n in ip6_finish_output2().
If neigh is not found, create new one.
Signed-off-by: YOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/ipv6/ip6_output.c')
| -rw-r--r-- | net/ipv6/ip6_output.c | 18 |
1 files changed, 13 insertions, 5 deletions
diff --git a/net/ipv6/ip6_output.c b/net/ipv6/ip6_output.c index 7c00edb343a0..b0895f5d5fc6 100644 --- a/net/ipv6/ip6_output.c +++ b/net/ipv6/ip6_output.c @@ -88,7 +88,8 @@ static int ip6_finish_output2(struct sk_buff *skb) struct dst_entry *dst = skb_dst(skb); struct net_device *dev = dst->dev; struct neighbour *neigh; - struct rt6_info *rt; + struct in6_addr *nexthop; + int ret; skb->protocol = htons(ETH_P_IPV6); skb->dev = dev; @@ -123,10 +124,17 @@ static int ip6_finish_output2(struct sk_buff *skb) skb->len); } - rt = (struct rt6_info *) dst; - neigh = rt->n; - if (neigh) - return dst_neigh_output(dst, neigh, skb); + rcu_read_lock_bh(); + nexthop = rt6_nexthop((struct rt6_info *)dst, &ipv6_hdr(skb)->daddr); + neigh = __ipv6_neigh_lookup_noref(dst->dev, nexthop); + if (unlikely(!neigh)) + neigh = __neigh_create(&nd_tbl, nexthop, dst->dev, false); + if (!IS_ERR(neigh)) { + ret = dst_neigh_output(dst, neigh, skb); + rcu_read_unlock_bh(); + return ret; + } + rcu_read_unlock_bh(); IP6_INC_STATS_BH(dev_net(dst->dev), ip6_dst_idev(dst), IPSTATS_MIB_OUTNOROUTES); |