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>

1 files changed, 12 insertions, 0 deletions

diff --git a/include/net/bonding.h b/include/net/bonding.h
index d1367ec74933..4e17095ad46a 100644
--- a/include/net/bonding.h
+++ b/include/net/bonding.h
@@ -150,6 +150,12 @@ struct bond_parm_tbl {
         int mode;
 };
 
+struct netdev_notify_work {
+        struct delayed_work     work;
+        struct slave            *slave;
+        struct net_device       *dev;
+};
+
 struct slave {
         struct net_device *dev; /* first - useful for panic debug */
         struct bonding *bond; /* our master */
@@ -243,6 +249,8 @@ struct bonding {
 #define bond_slave_get_rtnl(dev) \
         ((struct slave *) rtnl_dereference(dev->rx_handler_data))
 
+void bond_queue_slave_event(struct slave *slave);
+
 struct bond_vlan_tag {
         __be16          vlan_proto;
         unsigned short  vlan_id;
@@ -315,6 +323,7 @@ static inline void bond_set_active_slave(struct slave *slave)
 {
         if (slave->backup) {
                 slave->backup = 0;
+                bond_queue_slave_event(slave);
                 rtmsg_ifinfo(RTM_NEWLINK, slave->dev, 0, GFP_ATOMIC);
         }
 }
@@ -323,6 +332,7 @@ static inline void bond_set_backup_slave(struct slave *slave)
 {
         if (!slave->backup) {
                 slave->backup = 1;
+                bond_queue_slave_event(slave);
                 rtmsg_ifinfo(RTM_NEWLINK, slave->dev, 0, GFP_ATOMIC);
         }
 }
@@ -336,6 +346,7 @@ static inline void bond_set_slave_state(struct slave *slave,
         slave->backup = slave_state;
         if (notify) {
                 rtmsg_ifinfo(RTM_NEWLINK, slave->dev, 0, GFP_ATOMIC);
+                bond_queue_slave_event(slave);
                 slave->should_notify = 0;
         } else {
                 if (slave->should_notify)
@@ -493,6 +504,7 @@ static inline bool bond_is_slave_inactive(struct slave *slave)
 static inline void bond_set_slave_link_state(struct slave *slave, int state)
 {
         slave->link = state;
+        bond_queue_slave_event(slave);
 }
 
 static inline __be32 bond_confirm_addr(struct net_device *dev, __be32 dst, __be32 local)