[openib-general] [PATCH RFC 03/21] ofed_1_2 Backport netevents to SUSE9SP3.

[Steve Wise]

Backport netevents to SUSE9SP3.

Signed-off-by: Steve Wise <swise at opengridcomputing.com>
---

 .../2.6.5_sles9_sp3/include/net/netevent.h         |   33 +++++++++++
 .../2.6.5_sles9_sp3/include/src/netevent.c         |   71 +++++++++++++++++++++++
 2 files changed, 104 insertions(+), 0 deletions(-)

diff --git a/kernel_addons/backport/2.6.5_sles9_sp3/include/net/netevent.h b/kernel_addons/backport/2.6.5_sles9_sp3/include/net/netevent.h
new file mode 100644
index 0000000..e5d2162
--- /dev/null
+++ b/kernel_addons/backport/2.6.5_sles9_sp3/include/net/netevent.h
@@ -0,0 +1,33 @@
+#ifndef _NET_EVENT_H
+#define _NET_EVENT_H
+
+/*
+ *	Generic netevent notifiers
+ *
+ *	Authors:
+ *      Tom Tucker              <tom at opengridcomputing.com>
+ *      Steve Wise              <swise at opengridcomputing.com>
+ *
+ * 	Changes:
+ */
+#ifdef __KERNEL__
+
+#include <net/dst.h>
+
+struct netevent_redirect {
+	struct dst_entry *old;
+	struct dst_entry *new;
+};
+
+enum netevent_notif_type {
+	NETEVENT_NEIGH_UPDATE = 1, /* arg is struct neighbour ptr */
+	NETEVENT_PMTU_UPDATE,	   /* arg is struct dst_entry ptr */
+	NETEVENT_REDIRECT,	   /* arg is struct netevent_redirect ptr */
+};
+
+extern int register_netevent_notifier(struct notifier_block *nb);
+extern int unregister_netevent_notifier(struct notifier_block *nb);
+extern int call_netevent_notifiers(unsigned long val, void *v);
+
+#endif
+#endif
diff --git a/kernel_addons/backport/2.6.5_sles9_sp3/include/src/netevent.c b/kernel_addons/backport/2.6.5_sles9_sp3/include/src/netevent.c
new file mode 100644
index 0000000..5ffadd1
--- /dev/null
+++ b/kernel_addons/backport/2.6.5_sles9_sp3/include/src/netevent.c
@@ -0,0 +1,71 @@
+/*
+ *	Network event notifiers
+ *
+ *	Authors:
+ *      Tom Tucker             <tom at opengridcomputing.com>
+ *      Steve Wise             <swise at 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/module.h>
+#include <linux/skbuff.h>
+#include <linux/rtnetlink.h>
+#include <linux/notifier.h>
+
+static struct notifier_block *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 = 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 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 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);