net: fib_notifier: propagate extack down to the notifier block callback

Since errors are propagated all the way up to the caller, propagate
possible extack of the caller all the way down to the notifier block
callback.

Signed-off-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

4 files changed, 24 insertions, 13 deletions

diff --git a/net/ipv6/fib6_notifier.c b/net/ipv6/fib6_notifier.c
index 4fe79296999a..f87ae33e1d01 100644
--- a/net/ipv6/fib6_notifier.c
+++ b/net/ipv6/fib6_notifier.c
@@ -27,15 +27,16 @@ static unsigned int fib6_seq_read(struct net *net)
 	return fib6_tables_seq_read(net) + fib6_rules_seq_read(net);
 }
 
-static int fib6_dump(struct net *net, struct notifier_block *nb)
+static int fib6_dump(struct net *net, struct notifier_block *nb,
+		     struct netlink_ext_ack *extack)
 {
 	int err;
 
-	err = fib6_rules_dump(net, nb);
+	err = fib6_rules_dump(net, nb, extack);
 	if (err)
 		return err;
 
-	return fib6_tables_dump(net, nb);
+	return fib6_tables_dump(net, nb, extack);
 }
 
 static const struct fib_notifier_ops fib6_notifier_ops_template = {
diff --git a/net/ipv6/fib6_rules.c b/net/ipv6/fib6_rules.c
index f9e8fe3ff0c5..fafe556d21e0 100644
--- a/net/ipv6/fib6_rules.c
+++ b/net/ipv6/fib6_rules.c
@@ -47,9 +47,10 @@ bool fib6_rule_default(const struct fib_rule *rule)
 }
 EXPORT_SYMBOL_GPL(fib6_rule_default);
 
-int fib6_rules_dump(struct net *net, struct notifier_block *nb)
+int fib6_rules_dump(struct net *net, struct notifier_block *nb,
+		    struct netlink_ext_ack *extack)
 {
-	return fib_rules_dump(net, nb, AF_INET6);
+	return fib_rules_dump(net, nb, AF_INET6, extack);
 }
 
 unsigned int fib6_rules_seq_read(struct net *net)
diff --git a/net/ipv6/ip6_fib.c b/net/ipv6/ip6_fib.c
index 76124a909395..f66bc2af4e9d 100644
--- a/net/ipv6/ip6_fib.c
+++ b/net/ipv6/ip6_fib.c
@@ -359,9 +359,11 @@ unsigned int fib6_tables_seq_read(struct net *net)
 
 static int call_fib6_entry_notifier(struct notifier_block *nb,
 				    enum fib_event_type event_type,
-				    struct fib6_info *rt)
+				    struct fib6_info *rt,
+				    struct netlink_ext_ack *extack)
 {
 	struct fib6_entry_notifier_info info = {
+		.info.extack = extack,
 		.rt = rt,
 	};
 
@@ -401,13 +403,15 @@ int call_fib6_multipath_entry_notifiers(struct net *net,
 struct fib6_dump_arg {
 	struct net *net;
 	struct notifier_block *nb;
+	struct netlink_ext_ack *extack;
 };
 
 static int fib6_rt_dump(struct fib6_info *rt, struct fib6_dump_arg *arg)
 {
 	if (rt == arg->net->ipv6.fib6_null_entry)
 		return 0;
-	return call_fib6_entry_notifier(arg->nb, FIB_EVENT_ENTRY_ADD, rt);
+	return call_fib6_entry_notifier(arg->nb, FIB_EVENT_ENTRY_ADD,
+					rt, arg->extack);
 }
 
 static int fib6_node_dump(struct fib6_walker *w)
@@ -437,7 +441,8 @@ static int fib6_table_dump(struct net *net, struct fib6_table *tb,
 }
 
 /* Called with rcu_read_lock() */
-int fib6_tables_dump(struct net *net, struct notifier_block *nb)
+int fib6_tables_dump(struct net *net, struct notifier_block *nb,
+		     struct netlink_ext_ack *extack)
 {
 	struct fib6_dump_arg arg;
 	struct fib6_walker *w;
@@ -451,6 +456,7 @@ int fib6_tables_dump(struct net *net, struct notifier_block *nb)
 	w->func = fib6_node_dump;
 	arg.net = net;
 	arg.nb = nb;
+	arg.extack = extack;
 	w->args = &arg;
 
 	for (h = 0; h < FIB6_TABLE_HASHSZ; h++) {
diff --git a/net/ipv6/ip6mr.c b/net/ipv6/ip6mr.c
index 857a89ad4d6c..bfa49ff70531 100644
--- a/net/ipv6/ip6mr.c
+++ b/net/ipv6/ip6mr.c
@@ -265,9 +265,10 @@ static void __net_exit ip6mr_rules_exit(struct net *net)
 	rtnl_unlock();
 }
 
-static int ip6mr_rules_dump(struct net *net, struct notifier_block *nb)
+static int ip6mr_rules_dump(struct net *net, struct notifier_block *nb,
+			    struct netlink_ext_ack *extack)
 {
-	return fib_rules_dump(net, nb, RTNL_FAMILY_IP6MR);
+	return fib_rules_dump(net, nb, RTNL_FAMILY_IP6MR, extack);
 }
 
 static unsigned int ip6mr_rules_seq_read(struct net *net)
@@ -324,7 +325,8 @@ static void __net_exit ip6mr_rules_exit(struct net *net)
 	rtnl_unlock();
 }
 
-static int ip6mr_rules_dump(struct net *net, struct notifier_block *nb)
+static int ip6mr_rules_dump(struct net *net, struct notifier_block *nb,
+			    struct netlink_ext_ack *extack)
 {
 	return 0;
 }
@@ -1256,10 +1258,11 @@ static unsigned int ip6mr_seq_read(struct net *net)
 	return net->ipv6.ipmr_seq + ip6mr_rules_seq_read(net);
 }
 
-static int ip6mr_dump(struct net *net, struct notifier_block *nb)
+static int ip6mr_dump(struct net *net, struct notifier_block *nb,
+		      struct netlink_ext_ack *extack)
 {
 	return mr_dump(net, nb, RTNL_FAMILY_IP6MR, ip6mr_rules_dump,
-		       ip6mr_mr_table_iter, &mrt_lock);
+		       ip6mr_mr_table_iter, &mrt_lock, extack);
 }
 
 static struct notifier_block ip6_mr_notifier = {