1 files changed, 32 insertions, 30 deletions

diff --git a/net/core/neighbour.c b/net/core/neighbour.c
index 3c4786b99907..f00a79fc301b 100644
--- a/net/core/neighbour.c
+++ b/net/core/neighbour.c
@@ -111,7 +111,7 @@ static void neigh_cleanup_and_release(struct neighbour *neigh)
 
 unsigned long neigh_rand_reach_time(unsigned long base)
 {
-	return base ? prandom_u32_max(base) + (base >> 1) : 0;
+	return base ? get_random_u32_below(base) + (base >> 1) : 0;
 }
 EXPORT_SYMBOL(neigh_rand_reach_time);
 
@@ -307,7 +307,31 @@ static int neigh_del_timer(struct neighbour *n)
 	return 0;
 }
 
-static void pneigh_queue_purge(struct sk_buff_head *list, struct net *net)
+static struct neigh_parms *neigh_get_dev_parms_rcu(struct net_device *dev,
+						   int family)
+{
+	switch (family) {
+	case AF_INET:
+		return __in_dev_arp_parms_get_rcu(dev);
+	case AF_INET6:
+		return __in6_dev_nd_parms_get_rcu(dev);
+	}
+	return NULL;
+}
+
+static void neigh_parms_qlen_dec(struct net_device *dev, int family)
+{
+	struct neigh_parms *p;
+
+	rcu_read_lock();
+	p = neigh_get_dev_parms_rcu(dev, family);
+	if (p)
+		p->qlen--;
+	rcu_read_unlock();
+}
+
+static void pneigh_queue_purge(struct sk_buff_head *list, struct net *net,
+			       int family)
 {
 	struct sk_buff_head tmp;
 	unsigned long flags;
@@ -321,13 +345,7 @@ static void pneigh_queue_purge(struct sk_buff_head *list, struct net *net)
 		struct net_device *dev = skb->dev;
 
 		if (net == NULL || net_eq(dev_net(dev), net)) {
-			struct in_device *in_dev;
-
-			rcu_read_lock();
-			in_dev = __in_dev_get_rcu(dev);
-			if (in_dev)
-				in_dev->arp_parms->qlen--;
-			rcu_read_unlock();
+			neigh_parms_qlen_dec(dev, family);
 			__skb_unlink(skb, list);
 			__skb_queue_tail(&tmp, skb);
 		}
@@ -409,7 +427,8 @@ static int __neigh_ifdown(struct neigh_table *tbl, struct net_device *dev,
 	write_lock_bh(&tbl->lock);
 	neigh_flush_dev(tbl, dev, skip_perm);
 	pneigh_ifdown_and_unlock(tbl, dev);
-	pneigh_queue_purge(&tbl->proxy_queue, dev_net(dev));
+	pneigh_queue_purge(&tbl->proxy_queue, dev ? dev_net(dev) : NULL,
+			   tbl->family);
 	if (skb_queue_empty_lockless(&tbl->proxy_queue))
 		del_timer_sync(&tbl->proxy_timer);
 	return 0;
@@ -1621,13 +1640,8 @@ static void neigh_proxy_process(struct timer_list *t)
 
 		if (tdif <= 0) {
 			struct net_device *dev = skb->dev;
-			struct in_device *in_dev;
 
-			rcu_read_lock();
-			in_dev = __in_dev_get_rcu(dev);
-			if (in_dev)
-				in_dev->arp_parms->qlen--;
-			rcu_read_unlock();
+			neigh_parms_qlen_dec(dev, tbl->family);
 			__skb_unlink(skb, &tbl->proxy_queue);
 
 			if (tbl->proxy_redo && netif_running(dev)) {
@@ -1652,7 +1666,7 @@ void pneigh_enqueue(struct neigh_table *tbl, struct neigh_parms *p,
 		    struct sk_buff *skb)
 {
 	unsigned long sched_next = jiffies +
-			prandom_u32_max(NEIGH_VAR(p, PROXY_DELAY));
+			get_random_u32_below(NEIGH_VAR(p, PROXY_DELAY));
 
 	if (p->qlen > NEIGH_VAR(p, PROXY_QLEN)) {
 		kfree_skb(skb);
@@ -1821,7 +1835,7 @@ int neigh_table_clear(int index, struct neigh_table *tbl)
 	cancel_delayed_work_sync(&tbl->managed_work);
 	cancel_delayed_work_sync(&tbl->gc_work);
 	del_timer_sync(&tbl->proxy_timer);
-	pneigh_queue_purge(&tbl->proxy_queue, NULL);
+	pneigh_queue_purge(&tbl->proxy_queue, NULL, tbl->family);
 	neigh_ifdown(tbl, NULL);
 	if (atomic_read(&tbl->entries))
 		pr_crit("neighbour leakage\n");
@@ -3539,18 +3553,6 @@ static int proc_unres_qlen(struct ctl_table *ctl, int write,
 	return ret;
 }
 
-static struct neigh_parms *neigh_get_dev_parms_rcu(struct net_device *dev,
-						   int family)
-{
-	switch (family) {
-	case AF_INET:
-		return __in_dev_arp_parms_get_rcu(dev);
-	case AF_INET6:
-		return __in6_dev_nd_parms_get_rcu(dev);
-	}
-	return NULL;
-}
-
 static void neigh_copy_dflt_parms(struct net *net, struct neigh_parms *p,
 				  int index)
 {