From 36fbd62c47d800705d9989c69994359711514165 Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Timo=20Ter=C3=A4s?= Date: Thu, 23 May 2013 11:43:55 +0300 Subject: [PATCH 2/6] arp: flush arp cache on IFF_NOARP change MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit IFF_NOARP affects what kind of neighbor entries are created (nud NOARP or nud INCOMPLETE). If the flag changes, flush the arp cache to refresh all entries. Signed-off-by: Timo Teräs --- net/ipv4/arp.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/net/ipv4/arp.c b/net/ipv4/arp.c index fea4929..2a06ecf 100644 --- a/net/ipv4/arp.c +++ b/net/ipv4/arp.c @@ -1226,6 +1226,10 @@ static int arp_netdev_event(struct notifier_block *this, unsigned long event, neigh_changeaddr(&arp_tbl, dev); rt_cache_flush(dev_net(dev)); break; + case NETDEV_CHANGE: + if (dev->flags_changed & IFF_NOARP) + neigh_changeaddr(&arp_tbl, dev); + break; default: break; } -- 1.8.2.3