1 files changed, 23 insertions, 37 deletions

diff --git a/net/ipv6/addrconf.c b/net/ipv6/addrconf.c
index 8e761b8c47c6..01146b66d666 100644
--- a/net/ipv6/addrconf.c
+++ b/net/ipv6/addrconf.c
@@ -1893,12 +1893,13 @@ EXPORT_SYMBOL(ipv6_chk_addr);
  *   2. does the address exist on the specific device
  *      (skip_dev_check = false)
  */
-int ipv6_chk_addr_and_flags(struct net *net, const struct in6_addr *addr,
-			    const struct net_device *dev, bool skip_dev_check,
-			    int strict, u32 banned_flags)
+static struct net_device *
+__ipv6_chk_addr_and_flags(struct net *net, const struct in6_addr *addr,
+			  const struct net_device *dev, bool skip_dev_check,
+			  int strict, u32 banned_flags)
 {
 	unsigned int hash = inet6_addr_hash(net, addr);
-	const struct net_device *l3mdev;
+	struct net_device *l3mdev, *ndev;
 	struct inet6_ifaddr *ifp;
 	u32 ifp_flags;
 
@@ -1909,10 +1910,11 @@ int ipv6_chk_addr_and_flags(struct net *net, const struct in6_addr *addr,
 		dev = NULL;
 
 	hlist_for_each_entry_rcu(ifp, &inet6_addr_lst[hash], addr_lst) {
-		if (!net_eq(dev_net(ifp->idev->dev), net))
+		ndev = ifp->idev->dev;
+		if (!net_eq(dev_net(ndev), net))
 			continue;
 
-		if (l3mdev_master_dev_rcu(ifp->idev->dev) != l3mdev)
+		if (l3mdev_master_dev_rcu(ndev) != l3mdev)
 			continue;
 
 		/* Decouple optimistic from tentative for evaluation here.
@@ -1923,15 +1925,23 @@ int ipv6_chk_addr_and_flags(struct net *net, const struct in6_addr *addr,
 			    : ifp->flags;
 		if (ipv6_addr_equal(&ifp->addr, addr) &&
 		    !(ifp_flags&banned_flags) &&
-		    (!dev || ifp->idev->dev == dev ||
+		    (!dev || ndev == dev ||
 		     !(ifp->scope&(IFA_LINK|IFA_HOST) || strict))) {
 			rcu_read_unlock();
-			return 1;
+			return ndev;
 		}
 	}
 
 	rcu_read_unlock();
-	return 0;
+	return NULL;
+}
+
+int ipv6_chk_addr_and_flags(struct net *net, const struct in6_addr *addr,
+			    const struct net_device *dev, bool skip_dev_check,
+			    int strict, u32 banned_flags)
+{
+	return __ipv6_chk_addr_and_flags(net, addr, dev, skip_dev_check,
+					 strict, banned_flags) ? 1 : 0;
 }
 EXPORT_SYMBOL(ipv6_chk_addr_and_flags);
 
@@ -1990,35 +2000,11 @@ EXPORT_SYMBOL(ipv6_chk_prefix);
  *
  * The caller should be protected by RCU, or RTNL.
  */
-struct net_device *ipv6_dev_find(struct net *net, const struct in6_addr *addr)
+struct net_device *ipv6_dev_find(struct net *net, const struct in6_addr *addr,
+				 struct net_device *dev)
 {
-	unsigned int hash = inet6_addr_hash(net, addr);
-	struct inet6_ifaddr *ifp, *result = NULL;
-	struct net_device *dev = NULL;
-
-	rcu_read_lock();
-	hlist_for_each_entry_rcu(ifp, &inet6_addr_lst[hash], addr_lst) {
-		if (net_eq(dev_net(ifp->idev->dev), net) &&
-		    ipv6_addr_equal(&ifp->addr, addr)) {
-			result = ifp;
-			break;
-		}
-	}
-
-	if (!result) {
-		struct rt6_info *rt;
-
-		rt = rt6_lookup(net, addr, NULL, 0, NULL, 0);
-		if (rt) {
-			dev = rt->dst.dev;
-			ip6_rt_put(rt);
-		}
-	} else {
-		dev = result->idev->dev;
-	}
-	rcu_read_unlock();
-
-	return dev;
+	return __ipv6_chk_addr_and_flags(net, addr, dev, !dev, 1,
+					 IFA_F_TENTATIVE);
 }
 EXPORT_SYMBOL(ipv6_dev_find);