bonding: Manage /proc/net/bonding/ entries from the netdev events

It was recently reported that moving a bonding device between network
namespaces causes warnings from /proc.  It turns out after the move we
were trying to add and to remove the /proc/net/bonding entries from the
wrong network namespace.

Move the bonding /proc registration code into the NETDEV_REGISTER and
NETDEV_UNREGISTER events where the proc registration and unregistration
will always happen at the right time.

Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 6 insertions, 3 deletions

diff --git a/drivers/net/bonding/bond_main.c b/drivers/net/bonding/bond_main.c
index b9c2ae62166d..2ee76993f052 100644
--- a/drivers/net/bonding/bond_main.c
+++ b/drivers/net/bonding/bond_main.c
@@ -3227,6 +3227,12 @@ static int bond_master_netdev_event(unsigned long event,
         switch (event) {
         case NETDEV_CHANGENAME:
                 return bond_event_changename(event_bond);
+        case NETDEV_UNREGISTER:
+                bond_remove_proc_entry(event_bond);
+                break;
+        case NETDEV_REGISTER:
+                bond_create_proc_entry(event_bond);
+                break;
         default:
                 break;
         }
@@ -4411,8 +4417,6 @@ static void bond_uninit(struct net_device *bond_dev)
 
         bond_work_cancel_all(bond);
 
-        bond_remove_proc_entry(bond);
-
         bond_debug_unregister(bond);
 
         __hw_addr_flush(&bond->mc_list);
@@ -4814,7 +4818,6 @@ static int bond_init(struct net_device *bond_dev)
 
         bond_set_lockdep_class(bond_dev);
 
-        bond_create_proc_entry(bond);
         list_add_tail(&bond->bond_list, &bn->dev_list);
 
         bond_prepare_sysfs_group(bond);