From: Vlad Yasevich <vyasevich@gmail.com>
Date: Tue, 14 Mar 2017 12:58:08 +0000 (-0400)
Subject: net: Resend IGMP memberships upon peer notification.
X-Git-Tag: v4.11-rc3~28^2~2
X-Git-Url: https://asedeno.scripts.mit.edu/gitweb/?a=commitdiff_plain;h=37c343b4f4e70e9dc328ab04903c0ec8d154c1a4;p=linux.git

net: Resend IGMP memberships upon peer notification.

When we notify peers of potential changes,  it's also good to update
IGMP memberships.  For example, during VM migration, updating IGMP
memberships will redirect existing multicast streams to the VM at the
new location.

Signed-off-by: Vladislav Yasevich <vyasevic@redhat.com>
Acked-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
---

diff --git a/net/core/dev.c b/net/core/dev.c
index 8637b2b71f3d..7869ae3837ca 100644
--- a/net/core/dev.c
+++ b/net/core/dev.c
@@ -1304,6 +1304,7 @@ void netdev_notify_peers(struct net_device *dev)
 {
 	rtnl_lock();
 	call_netdevice_notifiers(NETDEV_NOTIFY_PEERS, dev);
+	call_netdevice_notifiers(NETDEV_RESEND_IGMP, dev);
 	rtnl_unlock();
 }
 EXPORT_SYMBOL(netdev_notify_peers);