net: fix 'ip rule' iif/oif device rename

[ Upstream commit 946c032e5a53992ea45e062ecb08670ba39b99e3 ]

ip rules with iif/oif references do not update:
(detach/attach) across interface renames.

Signed-off-by: Maciej Żenczykowski <maze@google.com>
CC: Willem de Bruijn <willemb@google.com>
CC: Eric Dumazet <edumazet@google.com>
CC: Chris Davis <chrismd@google.com>
CC: Carlo Contavalli <ccontavalli@google.com>
Google-Bug-Id: 12936021
Acked-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>

diff --git a/net/core/fib_rules.c b/net/core/fib_rules.c
index c0c21b1ce1ecf7f9fd62bb0be698d445cda93c10..6af54f2d0da00f1ef485560c7de2ed072d897e7f 100644 (file)
--- a/net/core/fib_rules.c
+++ b/net/core/fib_rules.c
@@ -718,6 +718,13 @@ static int fib_rules_event(struct notifier_block *this, unsigned long event,
                        attach_rules(&ops->rules_list, dev);
                break;
 
+       case NETDEV_CHANGENAME:
+               list_for_each_entry(ops, &net->rules_ops, list) {
+                       detach_rules(&ops->rules_list, dev);
+                       attach_rules(&ops->rules_list, dev);
+               }
+               break;
+
        case NETDEV_UNREGISTER:
                list_for_each_entry(ops, &net->rules_ops, list)
                        detach_rules(&ops->rules_list, dev);