Merge remote-tracking branch 'lsk/v3.10/topic/configs' into linux-linaro-lsk

[firefly-linux-kernel-4.4.55.git] / net / ipv6 / route.c

diff --git a/net/ipv6/route.c b/net/ipv6/route.c
index 5a8bf536026ca03298c39509b7ae8327da95a514..b2614b22622baa266ad801a065d9e88698fd9df6 100644 (file)
--- a/net/ipv6/route.c
+++ b/net/ipv6/route.c
@@ -84,6 +84,8 @@ static int             ip6_dst_gc(struct dst_ops *ops);
 
 static int             ip6_pkt_discard(struct sk_buff *skb);
 static int             ip6_pkt_discard_out(struct sk_buff *skb);
+static int             ip6_pkt_prohibit(struct sk_buff *skb);
+static int             ip6_pkt_prohibit_out(struct sk_buff *skb);
 static void            ip6_link_failure(struct sk_buff *skb);
 static void            ip6_rt_update_pmtu(struct dst_entry *dst, struct sock *sk,
                                           struct sk_buff *skb, u32 mtu);
@@ -233,9 +235,6 @@ static const struct rt6_info ip6_null_entry_template = {
 
 #ifdef CONFIG_IPV6_MULTIPLE_TABLES
 
-static int ip6_pkt_prohibit(struct sk_buff *skb);
-static int ip6_pkt_prohibit_out(struct sk_buff *skb);
-
 static const struct rt6_info ip6_prohibit_entry_template = {
        .dst = {
                .__refcnt       = ATOMIC_INIT(1),
@@ -1237,7 +1236,7 @@ static unsigned int ip6_mtu(const struct dst_entry *dst)
        unsigned int mtu = dst_metric_raw(dst, RTAX_MTU);
 
        if (mtu)
-               return mtu;
+               goto out;
 
        mtu = IPV6_MIN_MTU;
 
@@ -1247,7 +1246,8 @@ static unsigned int ip6_mtu(const struct dst_entry *dst)
                mtu = idev->cnf.mtu6;
        rcu_read_unlock();
 
-       return mtu;
+out:
+       return min_t(unsigned int, mtu, IP6_MAX_MTU);
 }
 
 static struct dst_entry *icmp6_dst_gc_list;
@@ -1429,7 +1429,7 @@ int ip6_route_add(struct fib6_config *cfg)
        if (!table)
                goto out;
 
-       rt = ip6_dst_alloc(net, NULL, DST_NOCOUNT, table);
+       rt = ip6_dst_alloc(net, NULL, (cfg->fc_flags & RTF_ADDRCONF) ? 0 : DST_NOCOUNT, table);
 
        if (!rt) {
                err = -ENOMEM;
@@ -1498,21 +1498,24 @@ int ip6_route_add(struct fib6_config *cfg)
                                goto out;
                        }
                }
-               rt->dst.output = ip6_pkt_discard_out;
-               rt->dst.input = ip6_pkt_discard;
                rt->rt6i_flags = RTF_REJECT|RTF_NONEXTHOP;
                switch (cfg->fc_type) {
                case RTN_BLACKHOLE:
                        rt->dst.error = -EINVAL;
+                       rt->dst.output = dst_discard;
+                       rt->dst.input = dst_discard;
                        break;
                case RTN_PROHIBIT:
                        rt->dst.error = -EACCES;
+                       rt->dst.output = ip6_pkt_prohibit_out;
+                       rt->dst.input = ip6_pkt_prohibit;
                        break;
                case RTN_THROW:
-                       rt->dst.error = -EAGAIN;
-                       break;
                default:
-                       rt->dst.error = -ENETUNREACH;
+                       rt->dst.error = (cfg->fc_type == RTN_THROW) ? -EAGAIN
+                                       : -ENETUNREACH;
+                       rt->dst.output = ip6_pkt_discard_out;
+                       rt->dst.input = ip6_pkt_discard;
                        break;
                }
                goto install_route;
@@ -1836,9 +1839,7 @@ static struct rt6_info *ip6_rt_copy(struct rt6_info *ort,
                else
                        rt->rt6i_gateway = *dest;
                rt->rt6i_flags = ort->rt6i_flags;
-               if ((ort->rt6i_flags & (RTF_DEFAULT | RTF_ADDRCONF)) ==
-                   (RTF_DEFAULT | RTF_ADDRCONF))
-                       rt6_set_from(rt, ort);
+               rt6_set_from(rt, ort);
                rt->rt6i_metric = 0;
 
 #ifdef CONFIG_IPV6_SUBTREES
@@ -2077,8 +2078,6 @@ static int ip6_pkt_discard_out(struct sk_buff *skb)
        return ip6_pkt_drop(skb, ICMPV6_NOROUTE, IPSTATS_MIB_OUTNOROUTES);
 }
 
-#ifdef CONFIG_IPV6_MULTIPLE_TABLES
-
 static int ip6_pkt_prohibit(struct sk_buff *skb)
 {
        return ip6_pkt_drop(skb, ICMPV6_ADM_PROHIBITED, IPSTATS_MIB_INNOROUTES);
@@ -2090,8 +2089,6 @@ static int ip6_pkt_prohibit_out(struct sk_buff *skb)
        return ip6_pkt_drop(skb, ICMPV6_ADM_PROHIBITED, IPSTATS_MIB_OUTNOROUTES);
 }
 
-#endif
-
 /*
  *     Allocate a dst for local (unicast / anycast) address.
  */
@@ -2101,12 +2098,10 @@ struct rt6_info *addrconf_dst_alloc(struct inet6_dev *idev,
                                    bool anycast)
 {
        struct net *net = dev_net(idev->dev);
-       struct rt6_info *rt = ip6_dst_alloc(net, net->loopback_dev, 0, NULL);
-
-       if (!rt) {
-               net_warn_ratelimited("Maximum number of routes reached, consider increasing route/max_size\n");
+       struct rt6_info *rt = ip6_dst_alloc(net, net->loopback_dev,
+                                           DST_NOCOUNT, NULL);
+       if (!rt)
                return ERR_PTR(-ENOMEM);
-       }
 
        in6_dev_hold(idev);