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-rw-r--r--net/ipv6/addrconf.c43
1 files changed, 40 insertions, 3 deletions
diff --git a/net/ipv6/addrconf.c b/net/ipv6/addrconf.c
index e39239e6426e..d0611a5de45f 100644
--- a/net/ipv6/addrconf.c
+++ b/net/ipv6/addrconf.c
@@ -1713,6 +1713,40 @@ addrconf_prefix_route(struct in6_addr *pfx, int plen, struct net_device *dev,
ip6_route_add(&cfg);
}
+
+static struct rt6_info *addrconf_get_prefix_route(const struct in6_addr *pfx,
+ int plen,
+ const struct net_device *dev,
+ u32 flags, u32 noflags)
+{
+ struct fib6_node *fn;
+ struct rt6_info *rt = NULL;
+ struct fib6_table *table;
+
+ table = fib6_get_table(dev_net(dev), RT6_TABLE_PREFIX);
+ if (table == NULL)
+ return NULL;
+
+ write_lock_bh(&table->tb6_lock);
+ fn = fib6_locate(&table->tb6_root, pfx, plen, NULL, 0);
+ if (!fn)
+ goto out;
+ for (rt = fn->leaf; rt; rt = rt->dst.rt6_next) {
+ if (rt->rt6i_dev->ifindex != dev->ifindex)
+ continue;
+ if ((rt->rt6i_flags & flags) != flags)
+ continue;
+ if ((noflags != 0) && ((rt->rt6i_flags & flags) != 0))
+ continue;
+ dst_hold(&rt->dst);
+ break;
+ }
+out:
+ write_unlock_bh(&table->tb6_lock);
+ return rt;
+}
+
+
/* Create "default" multicast route to the interface */
static void addrconf_add_mroute(struct net_device *dev)
@@ -1842,10 +1876,13 @@ void addrconf_prefix_rcv(struct net_device *dev, u8 *opt, int len)
if (addrconf_finite_timeout(rt_expires))
rt_expires *= HZ;
- rt = rt6_lookup(net, &pinfo->prefix, NULL,
- dev->ifindex, 1);
+ rt = addrconf_get_prefix_route(&pinfo->prefix,
+ pinfo->prefix_len,
+ dev,
+ RTF_ADDRCONF | RTF_PREFIX_RT,
+ RTF_GATEWAY | RTF_DEFAULT);
- if (rt && addrconf_is_prefix_route(rt)) {
+ if (rt) {
/* Autoconf prefix route */
if (valid_lft == 0) {
ip6_del_rt(rt);