Merge branch 'perf/core' into perf/uprobes

Merge in latest upstream (and the latest perf development tree),
to prepare for tooling changes, and also to pick up v3.4 MM
changes that the uprobes code needs to take care of.

Signed-off-by: Ingo Molnar <mingo@kernel.org>

1 files changed, 48 insertions, 11 deletions

diff --git a/net/ipv6/route.c b/net/ipv6/route.c
index 8c2e3ab58f2..3992e26a603 100644
--- a/net/ipv6/route.c
+++ b/net/ipv6/route.c
@@ -121,9 +121,22 @@ static u32 *ipv6_cow_metrics(struct dst_entry *dst, unsigned long old)
 	return p;
 }
 
+static inline const void *choose_neigh_daddr(struct rt6_info *rt, const void *daddr)
+{
+	struct in6_addr *p = &rt->rt6i_gateway;
+
+	if (!ipv6_addr_any(p))
+		return (const void *) p;
+	return daddr;
+}
+
 static struct neighbour *ip6_neigh_lookup(const struct dst_entry *dst, const void *daddr)
 {
-	struct neighbour *n = __ipv6_neigh_lookup(&nd_tbl, dst->dev, daddr);
+	struct rt6_info *rt = (struct rt6_info *) dst;
+	struct neighbour *n;
+
+	daddr = choose_neigh_daddr(rt, daddr);
+	n = __ipv6_neigh_lookup(&nd_tbl, dst->dev, daddr);
 	if (n)
 		return n;
 	return neigh_create(&nd_tbl, daddr, dst->dev);
@@ -868,6 +881,16 @@ static struct rt6_info *ip6_pol_route_input(struct net *net, struct fib6_table *
 	return ip6_pol_route(net, table, fl6->flowi6_iif, fl6, flags);
 }
 
+static struct dst_entry *ip6_route_input_lookup(struct net *net,
+						struct net_device *dev,
+						struct flowi6 *fl6, int flags)
+{
+	if (rt6_need_strict(&fl6->daddr) && dev->type != ARPHRD_PIMREG)
+		flags |= RT6_LOOKUP_F_IFACE;
+
+	return fib6_rule_lookup(net, fl6, flags, ip6_pol_route_input);
+}
+
 void ip6_route_input(struct sk_buff *skb)
 {
 	const struct ipv6hdr *iph = ipv6_hdr(skb);
@@ -882,10 +905,7 @@ void ip6_route_input(struct sk_buff *skb)
 		.flowi6_proto = iph->nexthdr,
 	};
 
-	if (rt6_need_strict(&iph->daddr) && skb->dev->type != ARPHRD_PIMREG)
-		flags |= RT6_LOOKUP_F_IFACE;
-
-	skb_dst_set(skb, fib6_rule_lookup(net, &fl6, flags, ip6_pol_route_input));
+	skb_dst_set(skb, ip6_route_input_lookup(net, skb->dev, &fl6, flags));
 }
 
 static struct rt6_info *ip6_pol_route_output(struct net *net, struct fib6_table *table,
@@ -1077,7 +1097,7 @@ struct dst_entry *icmp6_dst_alloc(struct net_device *dev,
 	struct net *net = dev_net(dev);
 
 	if (unlikely(!idev))
-		return NULL;
+		return ERR_PTR(-ENODEV);
 
 	rt = ip6_dst_alloc(&net->ipv6.ip6_dst_ops, dev, 0);
 	if (unlikely(!rt)) {
@@ -2461,8 +2481,12 @@ static int rt6_fill_node(struct net *net,
 
 	rcu_read_lock();
 	n = dst_get_neighbour_noref(&rt->dst);
-	if (n)
-		NLA_PUT(skb, RTA_GATEWAY, 16, &n->primary_key);
+	if (n) {
+		if (nla_put(skb, RTA_GATEWAY, 16, &n->primary_key) < 0) {
+			rcu_read_unlock();
+			goto nla_put_failure;
+		}
+	}
 	rcu_read_unlock();
 
 	if (rt->dst.dev)
@@ -2520,7 +2544,7 @@ static int inet6_rtm_getroute(struct sk_buff *in_skb, struct nlmsghdr* nlh, void
 	struct sk_buff *skb;
 	struct rtmsg *rtm;
 	struct flowi6 fl6;
-	int err, iif = 0;
+	int err, iif = 0, oif = 0;
 
 	err = nlmsg_parse(nlh, sizeof(*rtm), tb, RTA_MAX, rtm_ipv6_policy);
 	if (err < 0)
@@ -2547,15 +2571,29 @@ static int inet6_rtm_getroute(struct sk_buff *in_skb, struct nlmsghdr* nlh, void
 		iif = nla_get_u32(tb[RTA_IIF]);
 
 	if (tb[RTA_OIF])
-		fl6.flowi6_oif = nla_get_u32(tb[RTA_OIF]);
+		oif = nla_get_u32(tb[RTA_OIF]);
 
 	if (iif) {
 		struct net_device *dev;
+		int flags = 0;
+
 		dev = __dev_get_by_index(net, iif);
 		if (!dev) {
 			err = -ENODEV;
 			goto errout;
 		}
+
+		fl6.flowi6_iif = iif;
+
+		if (!ipv6_addr_any(&fl6.saddr))
+			flags |= RT6_LOOKUP_F_HAS_SADDR;
+
+		rt = (struct rt6_info *)ip6_route_input_lookup(net, dev, &fl6,
+							       flags);
+	} else {
+		fl6.flowi6_oif = oif;
+
+		rt = (struct rt6_info *)ip6_route_output(net, NULL, &fl6);
 	}
 
 	skb = alloc_skb(NLMSG_GOODSIZE, GFP_KERNEL);
@@ -2570,7 +2608,6 @@ static int inet6_rtm_getroute(struct sk_buff *in_skb, struct nlmsghdr* nlh, void
 	skb_reset_mac_header(skb);
 	skb_reserve(skb, MAX_HEADER + sizeof(struct ipv6hdr));
 
-	rt = (struct rt6_info*) ip6_route_output(net, NULL, &fl6);
 	skb_dst_set(skb, &rt->dst);
 
 	err = rt6_fill_node(net, skb, rt, &fl6.daddr, &fl6.saddr, iif,