ipvs: prefer NETDEV_DOWN event to free cached dsts

The real server becomes unreachable on down event,
no need to wait device unregistration. Should help in
releasing dsts early before dst->dev is replaced with lo.

Signed-off-by: Julian Anastasov <ja@ssi.bg>
Signed-off by: Hans Schillstrom <hans@schillstrom.com>
Signed-off-by: Simon Horman <horms@verge.net.au>

1 files changed, 3 insertions, 5 deletions

diff --git a/net/netfilter/ipvs/ip_vs_ctl.c b/net/netfilter/ipvs/ip_vs_ctl.c
index 8104120f16a5..6b55ba69c800 100644
--- a/net/netfilter/ipvs/ip_vs_ctl.c
+++ b/net/netfilter/ipvs/ip_vs_ctl.c
@@ -1514,10 +1514,8 @@ __ip_vs_dev_reset(struct ip_vs_dest *dest, struct net_device *dev)
         spin_unlock_bh(&dest->dst_lock);
 
 }
-/*
- * Netdev event receiver
- * Currently only NETDEV_UNREGISTER is handled, i.e. if we hold a reference to
- * a device that is "unregister" it must be released.
+/* Netdev event receiver
+ * Currently only NETDEV_DOWN is handled to release refs to cached dsts
  */
 static int ip_vs_dst_event(struct notifier_block *this, unsigned long event,
                             void *ptr)
@@ -1529,7 +1527,7 @@ static int ip_vs_dst_event(struct notifier_block *this, unsigned long event,
         struct ip_vs_dest *dest;
         unsigned int idx;
 
-        if (event != NETDEV_UNREGISTER || !ipvs)
+        if (event != NETDEV_DOWN || !ipvs)
                 return NOTIFY_DONE;
         IP_VS_DBG(3, "%s() dev=%s\n", __func__, dev->name);
         EnterFunction(2);