From 6c8b4e3ff81b82fc153625e81e60af1d89de2c32 Mon Sep 17 00:00:00 2001 From: =?utf8?q?Timo=20Ter=C3=A4s?= Date: Tue, 28 May 2013 01:30:23 +0000 Subject: [PATCH] arp: flush arp cache on IFF_NOARP change MIME-Version: 1.0 Content-Type: text/plain; charset=utf8 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 Signed-off-by: Jiri Pirko v2->v3: shortened notifier_info struct name Signed-off-by: David S. Miller --- net/ipv4/arp.c | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/net/ipv4/arp.c b/net/ipv4/arp.c index bf574029a183..4429b013f269 100644 --- a/net/ipv4/arp.c +++ b/net/ipv4/arp.c @@ -1235,12 +1235,18 @@ static int arp_netdev_event(struct notifier_block *this, unsigned long event, void *ptr) { struct net_device *dev = netdev_notifier_info_to_dev(ptr); + struct netdev_notifier_change_info *change_info; switch (event) { case NETDEV_CHANGEADDR: neigh_changeaddr(&arp_tbl, dev); rt_cache_flush(dev_net(dev)); break; + case NETDEV_CHANGE: + change_info = ptr; + if (change_info->flags_changed & IFF_NOARP) + neigh_changeaddr(&arp_tbl, dev); + break; default: break; } -- 2.20.1