net/bonding: Destroy bonding master when last slave is gone

When bonding enslaves non Ethernet devices it takes pointers to functions
in the module that owns the slaves. In this case it becomes unsafe
to keep the bonding master registered after last slave was unenslaved
because we don't know if the pointers are still valid.  Destroying the bond when slave_cnt is zero
ensures that these functions be used anymore.

Signed-off-by: Moni Shoua <monis at voltaire.com>
Acked-by: Jay Vosburgh <fubar@us.ibm.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>

1 files changed, 3 insertions, 0 deletions

diff --git a/drivers/net/bonding/bonding.h b/drivers/net/bonding/bonding.h
index e0e06a84b5b..85e579b0d6f 100644
--- a/drivers/net/bonding/bonding.h
+++ b/drivers/net/bonding/bonding.h
@@ -188,6 +188,7 @@ struct bonding {
         s8       kill_timers;
         s8       do_set_mac_addr;
         s8       send_grat_arp;
+        s8       setup_by_slave;
         struct   net_device_stats stats;
 #ifdef CONFIG_PROC_FS
         struct   proc_dir_entry *proc_entry;
@@ -295,6 +296,8 @@ static inline void bond_unset_master_alb_flags(struct bonding *bond)
 struct vlan_entry *bond_next_vlan(struct bonding *bond, struct vlan_entry *curr);
 int bond_dev_queue_xmit(struct bonding *bond, struct sk_buff *skb, struct net_device *slave_dev);
 int bond_create(char *name, struct bond_params *params, struct bonding **newbond);
+void bond_destroy(struct bonding *bond);
+int  bond_release_and_destroy(struct net_device *bond_dev, struct net_device *slave_dev);
 void bond_deinit(struct net_device *bond_dev);
 int bond_create_sysfs(void);
 void bond_destroy_sysfs(void);