This commit was manufactured by cvs2svn to create branch 'vserver'.

[linux-2.6.git] / net / core / netevent.c

diff --git a/net/core/netevent.c b/net/core/netevent.c
new file mode 100644 (file)
index 0000000..35d02c3
--- /dev/null
+++ b/net/core/netevent.c
@@ -0,0 +1,69 @@
+/*
+ *     Network event notifiers
+ *
+ *     Authors:
+ *      Tom Tucker             <tom@opengridcomputing.com>
+ *      Steve Wise             <swise@opengridcomputing.com>
+ *
+ *     This program is free software; you can redistribute it and/or
+ *      modify it under the terms of the GNU General Public License
+ *      as published by the Free Software Foundation; either version
+ *      2 of the License, or (at your option) any later version.
+ *
+ *     Fixes:
+ */
+
+#include <linux/rtnetlink.h>
+#include <linux/notifier.h>
+
+static ATOMIC_NOTIFIER_HEAD(netevent_notif_chain);
+
+/**
+ *     register_netevent_notifier - register a netevent notifier block
+ *     @nb: notifier
+ *
+ *     Register a notifier to be called when a netevent occurs.
+ *     The notifier passed is linked into the kernel structures and must
+ *     not be reused until it has been unregistered. A negative errno code
+ *     is returned on a failure.
+ */
+int register_netevent_notifier(struct notifier_block *nb)
+{
+       int err;
+
+       err = atomic_notifier_chain_register(&netevent_notif_chain, nb);
+       return err;
+}
+
+/**
+ *     netevent_unregister_notifier - unregister a netevent notifier block
+ *     @nb: notifier
+ *
+ *     Unregister a notifier previously registered by
+ *     register_neigh_notifier(). The notifier is unlinked into the
+ *     kernel structures and may then be reused. A negative errno code
+ *     is returned on a failure.
+ */
+
+int unregister_netevent_notifier(struct notifier_block *nb)
+{
+       return atomic_notifier_chain_unregister(&netevent_notif_chain, nb);
+}
+
+/**
+ *     call_netevent_notifiers - call all netevent notifier blocks
+ *      @val: value passed unmodified to notifier function
+ *      @v:   pointer passed unmodified to notifier function
+ *
+ *     Call all neighbour notifier blocks.  Parameters and return value
+ *     are as for notifier_call_chain().
+ */
+
+int call_netevent_notifiers(unsigned long val, void *v)
+{
+       return atomic_notifier_call_chain(&netevent_notif_chain, val, v);
+}
+
+EXPORT_SYMBOL_GPL(register_netevent_notifier);
+EXPORT_SYMBOL_GPL(unregister_netevent_notifier);
+EXPORT_SYMBOL_GPL(call_netevent_notifiers);