ipv6: make ECMP route replacement less greedy

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

diff --git a/net/ipv6/route.c b/net/ipv6/route.c
index 6f01fe122abd7c0348bfcd67d1a55ecb40f1c0b0..36bf4c3fe4f5deb1bb43c9c8f9c8797c27971b2e 100644 (file)
--- a/net/ipv6/route.c
+++ b/net/ipv6/route.c
@@ -523,7 +523,7 @@ static void rt6_probe_deferred(struct work_struct *w)
                container_of(w, struct __rt6_probe_work, work);
 
        addrconf_addr_solict_mult(&work->target, &mcaddr);
-       ndisc_send_ns(work->dev, &work->target, &mcaddr, NULL, NULL);
+       ndisc_send_ns(work->dev, &work->target, &mcaddr, NULL);
        dev_put(work->dev);
        kfree(work);
 }
@@ -1174,11 +1174,10 @@ static struct rt6_info *ip6_pol_route_output(struct net *net, struct fib6_table
        return ip6_pol_route(net, table, fl6->flowi6_oif, fl6, flags);
 }
 
-struct dst_entry *ip6_route_output(struct net *net, const struct sock *sk,
-                                   struct flowi6 *fl6)
+struct dst_entry *ip6_route_output_flags(struct net *net, const struct sock *sk,
+                                        struct flowi6 *fl6, int flags)
 {
        struct dst_entry *dst;
-       int flags = 0;
        bool any_src;
 
        dst = l3mdev_rt6_dst_by_oif(net, fl6);
@@ -1199,7 +1198,7 @@ struct dst_entry *ip6_route_output(struct net *net, const struct sock *sk,
 
        return fib6_rule_lookup(net, fl6, flags, ip6_pol_route_output);
 }
-EXPORT_SYMBOL(ip6_route_output);
+EXPORT_SYMBOL_GPL(ip6_route_output_flags);
 
 struct dst_entry *ip6_blackhole_route(struct net *net, struct dst_entry *dst_orig)
 {
@@ -1728,6 +1727,8 @@ static int ip6_convert_metrics(struct mx6_config *mxc,
                } else {
                        val = nla_get_u32(nla);
                }
+               if (type == RTAX_HOPLIMIT && val > 255)
+                       val = 255;
                if (type == RTAX_FEATURES && (val & ~RTAX_FEATURE_MASK))
                        goto err;
 
@@ -3139,7 +3140,9 @@ static int rt6_fill_node(struct net *net,
        if (iif) {
 #ifdef CONFIG_IPV6_MROUTE
                if (ipv6_addr_is_multicast(&rt->rt6i_dst.addr)) {
-                       int err = ip6mr_get_route(net, skb, rtm, nowait);
+                       int err = ip6mr_get_route(net, skb, rtm, nowait,
+                                                 portid);
+
                        if (err <= 0) {
                                if (!nowait) {
                                        if (err == 0)
@@ -3193,7 +3196,8 @@ static int rt6_fill_node(struct net *net,
        if (nla_put_u8(skb, RTA_PREF, IPV6_EXTRACT_PREF(rt->rt6i_flags)))
                goto nla_put_failure;
 
-       lwtunnel_fill_encap(skb, rt->dst.lwtstate);
+       if (lwtunnel_fill_encap(skb, rt->dst.lwtstate) < 0)
+               goto nla_put_failure;
 
        nlmsg_end(skb, nlh);
        return 0;