Subject: [PATCH RFC net-next 03/20] net/ipv6: Pass net to fib6_update_sernum

From: David Ahern <[email-masked]>
Date: Sun, 25 Feb 2018 11:47:13 -0800

Pass net namespace to fib6_update_sernum. Can not be marked const
as fib6_new_sernum will change ipv6.fib6_sernum.

Signed-off-by: David Ahern <[email-masked]>
---
 include/net/ip6_fib.h |  2 +-
 net/ipv6/ip6_fib.c    |  3 +--
 net/ipv6/route.c      | 10 +++++-----
 3 files changed, 7 insertions(+), 8 deletions(-)

diff --git a/include/net/ip6_fib.h b/include/net/ip6_fib.h
index 34ec321d6a03..363d4b9d140c 100644
--- a/include/net/ip6_fib.h
+++ b/include/net/ip6_fib.h
@@ -406,7 +406,7 @@ void __net_exit fib6_notifier_exit(struct net *net);
 unsigned int fib6_tables_seq_read(struct net *net);
 int fib6_tables_dump(struct net *net, struct notifier_block *nb);
 
-void fib6_update_sernum(struct rt6_info *rt);
+void fib6_update_sernum(struct net *net, struct rt6_info *rt);
 void fib6_update_sernum_upto_root(struct net *net, struct rt6_info *rt);
 
 #ifdef CONFIG_IPV6_MULTIPLE_TABLES
diff --git a/net/ipv6/ip6_fib.c b/net/ipv6/ip6_fib.c
index cab95cf3b39f..51d2d5a7ba89 100644
--- a/net/ipv6/ip6_fib.c
+++ b/net/ipv6/ip6_fib.c
@@ -105,9 +105,8 @@ enum {
 	FIB6_NO_SERNUM_CHANGE = 0,
 };
 
-void fib6_update_sernum(struct rt6_info *rt)
+void fib6_update_sernum(struct net *net, struct rt6_info *rt)
 {
-	struct net *net = dev_net(rt->dst.dev);
 	struct fib6_node *fn;
 
 	fn = rcu_dereference_protected(rt->rt6i_node,
diff --git a/net/ipv6/route.c b/net/ipv6/route.c
index aa709b644945..153577ded1a7 100644
--- a/net/ipv6/route.c
+++ b/net/ipv6/route.c
@@ -1344,7 +1344,7 @@ static int rt6_insert_exception(struct rt6_info *nrt,
 	/* Update fn->fn_sernum to invalidate all cached dst */
 	if (!err) {
 		spin_lock_bh(&ort->rt6i_table->tb6_lock);
-		fib6_update_sernum(ort);
+		fib6_update_sernum(net, ort);
 		spin_unlock_bh(&ort->rt6i_table->tb6_lock);
 		fib6_force_start_gc(net);
 	}
@@ -3636,11 +3636,11 @@ void rt6_multipath_rebalance(struct rt6_info *rt)
 static int fib6_ifup(struct rt6_info *rt, void *p_arg)
 {
 	const struct arg_netdev_event *arg = p_arg;
-	const struct net *net = dev_net(arg->dev);
+	struct net *net = dev_net(arg->dev);
 
 	if (rt != net->ipv6.ip6_null_entry && rt->dst.dev == arg->dev) {
 		rt->rt6i_nh_flags &= ~arg->nh_flags;
-		fib6_update_sernum_upto_root(dev_net(rt->dst.dev), rt);
+		fib6_update_sernum_upto_root(net, rt);
 		rt6_multipath_rebalance(rt);
 	}
 
@@ -3719,7 +3719,7 @@ static int fib6_ifdown(struct rt6_info *rt, void *p_arg)
 {
 	const struct arg_netdev_event *arg = p_arg;
 	const struct net_device *dev = arg->dev;
-	const struct net *net = dev_net(dev);
+	struct net *net = dev_net(dev);
 
 	if (rt == net->ipv6.ip6_null_entry)
 		return 0;
@@ -3742,7 +3742,7 @@ static int fib6_ifdown(struct rt6_info *rt, void *p_arg)
 			}
 			rt6_multipath_nh_flags_set(rt, dev, RTNH_F_DEAD |
 						   RTNH_F_LINKDOWN);
-			fib6_update_sernum(rt);
+			fib6_update_sernum(net, rt);
 			rt6_multipath_rebalance(rt);
 		}
 		return -2;
-- 
2.11.0