net/bonding: Notify state change on slaves
Use notifier chain to dispatch an event upon a change in slave state.
Event is dispatched with slave specific info.
Signed-off-by: Moni Shoua <monis@mellanox.com>
Signed-off-by: Or Gerlitz <ogerlitz@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/drivers/net/bonding/bond_main.c b/drivers/net/bonding/bond_main.c
index 92fe3a1..679ef00 100644
--- a/drivers/net/bonding/bond_main.c
+++ b/drivers/net/bonding/bond_main.c
@@ -1196,6 +1196,47 @@
info->link_failure_count = slave->link_failure_count;
}
+static void bond_netdev_notify(struct slave *slave, struct net_device *dev)
+{
+ struct bonding *bond = slave->bond;
+ struct netdev_bonding_info bonding_info;
+
+ rtnl_lock();
+ /* make sure that slave is still valid */
+ if (dev->priv_flags & IFF_BONDING) {
+ bond_fill_ifslave(slave, &bonding_info.slave);
+ bond_fill_ifbond(bond, &bonding_info.master);
+ netdev_bonding_info_change(slave->dev, &bonding_info);
+ }
+ rtnl_unlock();
+}
+
+static void bond_netdev_notify_work(struct work_struct *_work)
+{
+ struct netdev_notify_work *w =
+ container_of(_work, struct netdev_notify_work, work.work);
+
+ bond_netdev_notify(w->slave, w->dev);
+ dev_put(w->dev);
+}
+
+void bond_queue_slave_event(struct slave *slave)
+{
+ struct netdev_notify_work *nnw = kzalloc(sizeof(*nnw), GFP_ATOMIC);
+
+ if (!nnw)
+ return;
+
+ INIT_DELAYED_WORK(&nnw->work, bond_netdev_notify_work);
+ nnw->slave = slave;
+ nnw->dev = slave->dev;
+
+ if (queue_delayed_work(slave->bond->wq, &nnw->work, 0))
+ dev_hold(slave->dev);
+ else
+ kfree(nnw);
+}
+
/* enslave device <slave> to bond device <master> */
int bond_enslave(struct net_device *bond_dev, struct net_device *slave_dev)
{
@@ -1590,6 +1631,7 @@
new_slave->link != BOND_LINK_DOWN ? "an up" : "a down");
/* enslave is successful */
+ bond_queue_slave_event(new_slave);
return 0;
/* Undo stages on error */