Merge branch 'master' of master.kernel.org:/pub/scm/linux/kernel/git/davem/net-2.6

[pandora-kernel.git] / net / core / net_namespace.c

diff --git a/net/core/net_namespace.c b/net/core/net_namespace.c
index 861b4cb..55cffad 100644 (file)
--- a/net/core/net_namespace.c
+++ b/net/core/net_namespace.c
@@ -324,6 +324,38 @@ void unregister_pernet_subsys(struct pernet_operations *module)
 }
 EXPORT_SYMBOL_GPL(unregister_pernet_subsys);
 
+int register_pernet_gen_subsys(int *id, struct pernet_operations *ops)
+{
+       int rv;
+
+       mutex_lock(&net_mutex);
+again:
+       rv = ida_get_new_above(&net_generic_ids, 1, id);
+       if (rv < 0) {
+               if (rv == -EAGAIN) {
+                       ida_pre_get(&net_generic_ids, GFP_KERNEL);
+                       goto again;
+               }
+               goto out;
+       }
+       rv = register_pernet_operations(first_device, ops);
+       if (rv < 0)
+               ida_remove(&net_generic_ids, *id);
+       mutex_unlock(&net_mutex);
+out:
+       return rv;
+}
+EXPORT_SYMBOL_GPL(register_pernet_gen_subsys);
+
+void unregister_pernet_gen_subsys(int id, struct pernet_operations *ops)
+{
+       mutex_lock(&net_mutex);
+       unregister_pernet_operations(ops);
+       ida_remove(&net_generic_ids, id);
+       mutex_unlock(&net_mutex);
+}
+EXPORT_SYMBOL_GPL(unregister_pernet_gen_subsys);
+
 /**
  *      register_pernet_device - register a network namespace device
  *     @ops:  pernet operations structure for the subsystem