1 files changed, 52 insertions, 12 deletions

diff --git a/net/ipv6/route.c b/net/ipv6/route.c
index 11f67eaae1c1..decb94219a70 100644
--- a/net/ipv6/route.c
+++ b/net/ipv6/route.c
@@ -336,9 +336,9 @@ static struct rt6_info *__ip6_dst_alloc(struct net *net,
 	return rt;
 }
 
-static struct rt6_info *ip6_dst_alloc(struct net *net,
-				      struct net_device *dev,
-				      int flags)
+struct rt6_info *ip6_dst_alloc(struct net *net,
+			       struct net_device *dev,
+			       int flags)
 {
 	struct rt6_info *rt = __ip6_dst_alloc(net, dev, flags);
 
@@ -362,6 +362,7 @@ static struct rt6_info *ip6_dst_alloc(struct net *net,
 
 	return rt;
 }
+EXPORT_SYMBOL(ip6_dst_alloc);
 
 static void ip6_dst_destroy(struct dst_entry *dst)
 {
@@ -1763,6 +1764,37 @@ static int ip6_convert_metrics(struct mx6_config *mxc,
 	return -EINVAL;
 }
 
+static struct rt6_info *ip6_nh_lookup_table(struct net *net,
+					    struct fib6_config *cfg,
+					    const struct in6_addr *gw_addr)
+{
+	struct flowi6 fl6 = {
+		.flowi6_oif = cfg->fc_ifindex,
+		.daddr = *gw_addr,
+		.saddr = cfg->fc_prefsrc,
+	};
+	struct fib6_table *table;
+	struct rt6_info *rt;
+	int flags = 0;
+
+	table = fib6_get_table(net, cfg->fc_table);
+	if (!table)
+		return NULL;
+
+	if (!ipv6_addr_any(&cfg->fc_prefsrc))
+		flags |= RT6_LOOKUP_F_HAS_SADDR;
+
+	rt = ip6_pol_route(net, table, cfg->fc_ifindex, &fl6, flags);
+
+	/* if table lookup failed, fall back to full lookup */
+	if (rt == net->ipv6.ip6_null_entry) {
+		ip6_rt_put(rt);
+		rt = NULL;
+	}
+
+	return rt;
+}
+
 static struct rt6_info *ip6_route_info_create(struct fib6_config *cfg)
 {
 	struct net *net = cfg->fc_nlinfo.nl_net;
@@ -1938,7 +1970,7 @@ static struct rt6_info *ip6_route_info_create(struct fib6_config *cfg)
 		rt->rt6i_gateway = *gw_addr;
 
 		if (gwa_type != (IPV6_ADDR_LINKLOCAL|IPV6_ADDR_UNICAST)) {
-			struct rt6_info *grt;
+			struct rt6_info *grt = NULL;
 
 			/* IPv6 strictly inhibits using not link-local
 			   addresses as nexthop address.
@@ -1950,7 +1982,12 @@ static struct rt6_info *ip6_route_info_create(struct fib6_config *cfg)
 			if (!(gwa_type & IPV6_ADDR_UNICAST))
 				goto out;
 
-			grt = rt6_lookup(net, gw_addr, NULL, cfg->fc_ifindex, 1);
+			if (cfg->fc_table)
+				grt = ip6_nh_lookup_table(net, cfg, gw_addr);
+
+			if (!grt)
+				grt = rt6_lookup(net, gw_addr, NULL,
+						 cfg->fc_ifindex, 1);
 
 			err = -EHOSTUNREACH;
 			if (!grt)
@@ -2273,12 +2310,12 @@ static struct rt6_info *rt6_get_route_info(struct net_device *dev,
 					   const struct in6_addr *prefix, int prefixlen,
 					   const struct in6_addr *gwaddr)
 {
+	u32 tb_id = l3mdev_fib_table(dev) ? : addrconf_rt_table(dev, RT6_TABLE_INFO);
 	struct fib6_node *fn;
 	struct rt6_info *rt = NULL;
 	struct fib6_table *table;
 
-	table = fib6_get_table(dev_net(dev),
-			       addrconf_rt_table(dev, RT6_TABLE_INFO));
+	table = fib6_get_table(dev_net(dev), tb_id);
 	if (!table)
 		return NULL;
 
@@ -2317,7 +2354,7 @@ static struct rt6_info *rt6_add_route_info(struct net_device *dev,
 		.fc_nlinfo.nl_net = dev_net(dev),
 	};
 
-	cfg.fc_table = l3mdev_fib_table_by_index(dev_net(dev), dev->ifindex) ? : addrconf_rt_table(dev, RT6_TABLE_INFO);
+	cfg.fc_table = l3mdev_fib_table(dev) ? : addrconf_rt_table(dev, RT6_TABLE_INFO);
 	cfg.fc_dst = *prefix;
 	cfg.fc_gateway = *gwaddr;
 
@@ -2333,11 +2370,11 @@ static struct rt6_info *rt6_add_route_info(struct net_device *dev,
 
 struct rt6_info *rt6_get_dflt_router(const struct in6_addr *addr, struct net_device *dev)
 {
+	u32 tb_id = l3mdev_fib_table(dev) ? : addrconf_rt_table(dev, RT6_TABLE_DFLT);
 	struct rt6_info *rt;
 	struct fib6_table *table;
 
-	table = fib6_get_table(dev_net(dev),
-			       addrconf_rt_table(dev, RT6_TABLE_MAIN));
+	table = fib6_get_table(dev_net(dev), tb_id);
 	if (!table)
 		return NULL;
 
@@ -2940,8 +2977,11 @@ static int ip6_route_multipath_add(struct fib6_config *cfg)
 		 * nexthops have been replaced by first new, the rest should
 		 * be added to it.
 		 */
-		cfg->fc_nlinfo.nlh->nlmsg_flags &= ~(NLM_F_EXCL |
-						     NLM_F_REPLACE);
+		if (cfg->fc_nlinfo.nlh) {
+			cfg->fc_nlinfo.nlh->nlmsg_flags &= ~(NLM_F_EXCL |
+							     NLM_F_REPLACE);
+			cfg->fc_nlinfo.nlh->nlmsg_flags |= NLM_F_CREATE;
+		}
 		nhn++;
 	}