1 files changed, 40 insertions, 5 deletions

diff --git a/net/ipv6/anycast.c b/net/ipv6/anycast.c
index 0f2506e35359..21e01695b48c 100644
--- a/net/ipv6/anycast.c
+++ b/net/ipv6/anycast.c
@@ -49,9 +49,10 @@ static DEFINE_SPINLOCK(acaddr_hash_lock);
 
 static int ipv6_dev_ac_dec(struct net_device *dev, const struct in6_addr *addr);
 
-static u32 inet6_acaddr_hash(struct net *net, const struct in6_addr *addr)
+static u32 inet6_acaddr_hash(const struct net *net,
+			     const struct in6_addr *addr)
 {
-	u32 val = ipv6_addr_hash(addr) ^ net_hash_mix(net);
+	u32 val = __ipv6_addr_jhash(addr, net_hash_mix(net));
 
 	return hash_32(val, IN6_ADDR_HSIZE_SHIFT);
 }
@@ -252,9 +253,8 @@ static void aca_free_rcu(struct rcu_head *h)
 
 static void aca_put(struct ifacaddr6 *ac)
 {
-	if (refcount_dec_and_test(&ac->aca_refcnt)) {
-		call_rcu(&ac->rcu, aca_free_rcu);
-	}
+	if (refcount_dec_and_test(&ac->aca_refcnt))
+		call_rcu_hurry(&ac->rcu, aca_free_rcu);
 }
 
 static struct ifacaddr6 *aca_alloc(struct fib6_info *f6i,
@@ -278,6 +278,37 @@ static struct ifacaddr6 *aca_alloc(struct fib6_info *f6i,
 	return aca;
 }
 
+static void inet6_ifacaddr_notify(struct net_device *dev,
+				  const struct ifacaddr6 *ifaca, int event)
+{
+	struct inet6_fill_args fillargs = {
+		.event = event,
+		.netnsid = -1,
+	};
+	struct net *net = dev_net(dev);
+	struct sk_buff *skb;
+	int err = -ENOMEM;
+
+	skb = nlmsg_new(NLMSG_ALIGN(sizeof(struct ifaddrmsg)) +
+			nla_total_size(sizeof(struct in6_addr)) +
+			nla_total_size(sizeof(struct ifa_cacheinfo)),
+			GFP_KERNEL);
+	if (!skb)
+		goto error;
+
+	err = inet6_fill_ifacaddr(skb, ifaca, &fillargs);
+	if (err < 0) {
+		pr_err("Failed to fill in anycast addresses (err %d)\n", err);
+		nlmsg_free(skb);
+		goto error;
+	}
+
+	rtnl_notify(skb, net, 0, RTNLGRP_IPV6_ACADDR, NULL, GFP_KERNEL);
+	return;
+error:
+	rtnl_set_sk_err(net, RTNLGRP_IPV6_ACADDR, err);
+}
+
 /*
  *	device anycast group inc (add if not found)
  */
@@ -333,6 +364,8 @@ int __ipv6_dev_ac_inc(struct inet6_dev *idev, const struct in6_addr *addr)
 
 	addrconf_join_solict(idev->dev, &aca->aca_addr);
 
+	inet6_ifacaddr_notify(idev->dev, aca, RTM_NEWANYCAST);
+
 	aca_put(aca);
 	return 0;
 out:
@@ -375,6 +408,8 @@ int __ipv6_dev_ac_dec(struct inet6_dev *idev, const struct in6_addr *addr)
 
 	ip6_del_rt(dev_net(idev->dev), aca->aca_rt, false);
 
+	inet6_ifacaddr_notify(idev->dev, aca, RTM_DELANYCAST);
+
 	aca_put(aca);
 	return 0;
 }