1 files changed, 36 insertions, 9 deletions

diff --git a/net/ipv6/route.c b/net/ipv6/route.c
index 5015c50a5ba7..6ebdb7b6744c 100644
--- a/net/ipv6/route.c
+++ b/net/ipv6/route.c
@@ -84,9 +84,9 @@ static void		ip6_dst_ifdown(struct dst_entry *,
 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_discard_out(struct sock *sk, struct sk_buff *skb);
 static int              ip6_pkt_prohibit(struct sk_buff *skb);
-static int              ip6_pkt_prohibit_out(struct sk_buff *skb);
+static int              ip6_pkt_prohibit_out(struct sock *sk, 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);
@@ -290,7 +290,7 @@ static const struct rt6_info ip6_blk_hole_entry_template = {
                 .obsolete       = DST_OBSOLETE_FORCE_CHK,
                 .error          = -EINVAL,
                 .input          = dst_discard,
-                .output         = dst_discard,
+                .output         = dst_discard_sk,
         },
         .rt6i_flags     = (RTF_REJECT | RTF_NONEXTHOP),
         .rt6i_protocol  = RTPROT_KERNEL,
@@ -1058,7 +1058,7 @@ struct dst_entry *ip6_blackhole_route(struct net *net, struct dst_entry *dst_ori
 
                 new->__use = 1;
                 new->input = dst_discard;
-                new->output = dst_discard;
+                new->output = dst_discard_sk;
 
                 if (dst_metrics_read_only(&ort->dst))
                         new->_metrics = ort->dst._metrics;
@@ -1273,6 +1273,7 @@ void ip6_redirect(struct sk_buff *skb, struct net *net, int oif, u32 mark)
         struct flowi6 fl6;
 
         memset(&fl6, 0, sizeof(fl6));
+        fl6.flowi6_iif = LOOPBACK_IFINDEX;
         fl6.flowi6_oif = oif;
         fl6.flowi6_mark = mark;
         fl6.daddr = iph->daddr;
@@ -1294,6 +1295,7 @@ void ip6_redirect_no_header(struct sk_buff *skb, struct net *net, int oif,
         struct flowi6 fl6;
 
         memset(&fl6, 0, sizeof(fl6));
+        fl6.flowi6_iif = LOOPBACK_IFINDEX;
         fl6.flowi6_oif = oif;
         fl6.flowi6_mark = mark;
         fl6.daddr = msg->dest;
@@ -1338,7 +1340,7 @@ 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;
 
@@ -1348,7 +1350,8 @@ 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;
@@ -1576,7 +1579,7 @@ int ip6_route_add(struct fib6_config *cfg)
                 switch (cfg->fc_type) {
                 case RTN_BLACKHOLE:
                         rt->dst.error = -EINVAL;
-                        rt->dst.output = dst_discard;
+                        rt->dst.output = dst_discard_sk;
                         rt->dst.input = dst_discard;
                         break;
                 case RTN_PROHIBIT:
@@ -2128,7 +2131,7 @@ static int ip6_pkt_discard(struct sk_buff *skb)
         return ip6_pkt_drop(skb, ICMPV6_NOROUTE, IPSTATS_MIB_INNOROUTES);
 }
 
-static int ip6_pkt_discard_out(struct sk_buff *skb)
+static int ip6_pkt_discard_out(struct sock *sk, struct sk_buff *skb)
 {
         skb->dev = skb_dst(skb)->dev;
         return ip6_pkt_drop(skb, ICMPV6_NOROUTE, IPSTATS_MIB_OUTNOROUTES);
@@ -2139,7 +2142,7 @@ static int ip6_pkt_prohibit(struct sk_buff *skb)
         return ip6_pkt_drop(skb, ICMPV6_ADM_PROHIBITED, IPSTATS_MIB_INNOROUTES);
 }
 
-static int ip6_pkt_prohibit_out(struct sk_buff *skb)
+static int ip6_pkt_prohibit_out(struct sock *sk, struct sk_buff *skb)
 {
         skb->dev = skb_dst(skb)->dev;
         return ip6_pkt_drop(skb, ICMPV6_ADM_PROHIBITED, IPSTATS_MIB_OUTNOROUTES);
@@ -2231,6 +2234,27 @@ void rt6_remove_prefsrc(struct inet6_ifaddr *ifp)
         fib6_clean_all(net, fib6_remove_prefsrc, &adni);
 }
 
+#define RTF_RA_ROUTER           (RTF_ADDRCONF | RTF_DEFAULT | RTF_GATEWAY)
+#define RTF_CACHE_GATEWAY       (RTF_GATEWAY | RTF_CACHE)
+
+/* Remove routers and update dst entries when gateway turn into host. */
+static int fib6_clean_tohost(struct rt6_info *rt, void *arg)
+{
+        struct in6_addr *gateway = (struct in6_addr *)arg;
+
+        if ((((rt->rt6i_flags & RTF_RA_ROUTER) == RTF_RA_ROUTER) ||
+             ((rt->rt6i_flags & RTF_CACHE_GATEWAY) == RTF_CACHE_GATEWAY)) &&
+             ipv6_addr_equal(gateway, &rt->rt6i_gateway)) {
+                return -1;
+        }
+        return 0;
+}
+
+void rt6_clean_tohost(struct net *net, struct in6_addr *gateway)
+{
+        fib6_clean_all(net, fib6_clean_tohost, gateway);
+}
+
 struct arg_dev_net {
         struct net_device *dev;
         struct net *net;
@@ -2706,6 +2730,9 @@ static int inet6_rtm_getroute(struct sk_buff *in_skb, struct nlmsghdr* nlh)
         if (tb[RTA_OIF])
                 oif = nla_get_u32(tb[RTA_OIF]);
 
+        if (tb[RTA_MARK])
+                fl6.flowi6_mark = nla_get_u32(tb[RTA_MARK]);
+
         if (iif) {
                 struct net_device *dev;
                 int flags = 0;