1 files changed, 14 insertions, 19 deletions

diff --git a/net/ipv6/route.c b/net/ipv6/route.c
index 1f4b935a0e57..c43b0616742e 100644
--- a/net/ipv6/route.c
+++ b/net/ipv6/route.c
@@ -226,7 +226,7 @@ static struct neighbour *ip6_dst_neigh_lookup(const struct dst_entry *dst,
 					      struct sk_buff *skb,
 					      const void *daddr)
 {
-	const struct rt6_info *rt = container_of(dst, struct rt6_info, dst);
+	const struct rt6_info *rt = dst_rt6_info(dst);
 
 	return ip6_neigh_lookup(rt6_nexthop(rt, &in6addr_any),
 				dst->dev, skb, daddr);
@@ -234,8 +234,8 @@ static struct neighbour *ip6_dst_neigh_lookup(const struct dst_entry *dst,
 
 static void ip6_confirm_neigh(const struct dst_entry *dst, const void *daddr)
 {
+	const struct rt6_info *rt = dst_rt6_info(dst);
 	struct net_device *dev = dst->dev;
-	struct rt6_info *rt = (struct rt6_info *)dst;
 
 	daddr = choose_neigh_daddr(rt6_nexthop(rt, &in6addr_any), NULL, daddr);
 	if (!daddr)
@@ -354,7 +354,7 @@ EXPORT_SYMBOL(ip6_dst_alloc);
 
 static void ip6_dst_destroy(struct dst_entry *dst)
 {
-	struct rt6_info *rt = (struct rt6_info *)dst;
+	struct rt6_info *rt = dst_rt6_info(dst);
 	struct fib6_info *from;
 	struct inet6_dev *idev;
 
@@ -373,7 +373,7 @@ static void ip6_dst_destroy(struct dst_entry *dst)
 
 static void ip6_dst_ifdown(struct dst_entry *dst, struct net_device *dev)
 {
-	struct rt6_info *rt = (struct rt6_info *)dst;
+	struct rt6_info *rt = dst_rt6_info(dst);
 	struct inet6_dev *idev = rt->rt6i_idev;
 
 	if (idev && idev->dev != blackhole_netdev) {
@@ -1288,7 +1288,7 @@ struct rt6_info *rt6_lookup(struct net *net, const struct in6_addr *daddr,
 
 	dst = fib6_rule_lookup(net, &fl6, skb, flags, ip6_pol_route_lookup);
 	if (dst->error == 0)
-		return (struct rt6_info *) dst;
+		return dst_rt6_info(dst);
 
 	dst_release(dst);
 
@@ -2647,7 +2647,7 @@ struct dst_entry *ip6_route_output_flags(struct net *net,
 
 	rcu_read_lock();
 	dst = ip6_route_output_flags_noref(net, sk, fl6, flags);
-	rt6 = (struct rt6_info *)dst;
+	rt6 = dst_rt6_info(dst);
 	/* For dst cached in uncached_list, refcnt is already taken. */
 	if (list_empty(&rt6->dst.rt_uncached) && !dst_hold_safe(dst)) {
 		dst = &net->ipv6.ip6_null_entry->dst;
@@ -2661,7 +2661,7 @@ EXPORT_SYMBOL_GPL(ip6_route_output_flags);
 
 struct dst_entry *ip6_blackhole_route(struct net *net, struct dst_entry *dst_orig)
 {
-	struct rt6_info *rt, *ort = (struct rt6_info *) dst_orig;
+	struct rt6_info *rt, *ort = dst_rt6_info(dst_orig);
 	struct net_device *loopback_dev = net->loopback_dev;
 	struct dst_entry *new = NULL;
 
@@ -2744,7 +2744,7 @@ INDIRECT_CALLABLE_SCOPE struct dst_entry *ip6_dst_check(struct dst_entry *dst,
 	struct fib6_info *from;
 	struct rt6_info *rt;
 
-	rt = container_of(dst, struct rt6_info, dst);
+	rt = dst_rt6_info(dst);
 
 	if (rt->sernum)
 		return rt6_is_valid(rt) ? dst : NULL;
@@ -2772,7 +2772,7 @@ EXPORT_INDIRECT_CALLABLE(ip6_dst_check);
 
 static struct dst_entry *ip6_negative_advice(struct dst_entry *dst)
 {
-	struct rt6_info *rt = (struct rt6_info *) dst;
+	struct rt6_info *rt = dst_rt6_info(dst);
 
 	if (rt) {
 		if (rt->rt6i_flags & RTF_CACHE) {
@@ -2796,7 +2796,7 @@ static void ip6_link_failure(struct sk_buff *skb)
 
 	icmpv6_send(skb, ICMPV6_DEST_UNREACH, ICMPV6_ADDR_UNREACH, 0);
 
-	rt = (struct rt6_info *) skb_dst(skb);
+	rt = dst_rt6_info(skb_dst(skb));
 	if (rt) {
 		rcu_read_lock();
 		if (rt->rt6i_flags & RTF_CACHE) {
@@ -2852,7 +2852,7 @@ static void __ip6_rt_update_pmtu(struct dst_entry *dst, const struct sock *sk,
 				 bool confirm_neigh)
 {
 	const struct in6_addr *daddr, *saddr;
-	struct rt6_info *rt6 = (struct rt6_info *)dst;
+	struct rt6_info *rt6 = dst_rt6_info(dst);
 
 	/* Note: do *NOT* check dst_metric_locked(dst, RTAX_MTU)
 	 * IPv6 pmtu discovery isn't optional, so 'mtu lock' cannot disable it.
@@ -4174,7 +4174,7 @@ static void rt6_do_redirect(struct dst_entry *dst, struct sock *sk, struct sk_bu
 		}
 	}
 
-	rt = (struct rt6_info *) dst;
+	rt = dst_rt6_info(dst);
 	if (rt->rt6i_flags & RTF_REJECT) {
 		net_dbg_ratelimited("rt6_redirect: source isn't a valid nexthop for redirect target\n");
 		return;
@@ -5608,7 +5608,7 @@ static int rt6_fill_node(struct net *net, struct sk_buff *skb,
 			 int iif, int type, u32 portid, u32 seq,
 			 unsigned int flags)
 {
-	struct rt6_info *rt6 = (struct rt6_info *)dst;
+	struct rt6_info *rt6 = dst_rt6_info(dst);
 	struct rt6key *rt6_dst, *rt6_src;
 	u32 *pmetrics, table, rt6_flags;
 	unsigned char nh_flags = 0;
@@ -6111,7 +6111,7 @@ static int inet6_rtm_getroute(struct sk_buff *in_skb, struct nlmsghdr *nlh,
 	}
 
 
-	rt = container_of(dst, struct rt6_info, dst);
+	rt = dst_rt6_info(dst);
 	if (rt->dst.error) {
 		err = rt->dst.error;
 		ip6_rt_put(rt);
@@ -6428,7 +6428,6 @@ static struct ctl_table ipv6_route_table_template[] = {
 		.extra1		=	SYSCTL_ZERO,
 		.extra2		=	SYSCTL_ONE,
 	},
-	{ }
 };
 
 struct ctl_table * __net_init ipv6_route_sysctl_init(struct net *net)
@@ -6452,10 +6451,6 @@ struct ctl_table * __net_init ipv6_route_sysctl_init(struct net *net)
 		table[8].data = &net->ipv6.sysctl.ip6_rt_min_advmss;
 		table[9].data = &net->ipv6.sysctl.ip6_rt_gc_min_interval;
 		table[10].data = &net->ipv6.sysctl.skip_notify_on_dev_down;
-
-		/* Don't export sysctls to unprivileged users */
-		if (net->user_ns != &init_user_ns)
-			table[1].procname = NULL;
 	}
 
 	return table;