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-rw-r--r--net/openvswitch/dp_notify.c66
1 files changed, 66 insertions, 0 deletions
diff --git a/net/openvswitch/dp_notify.c b/net/openvswitch/dp_notify.c
new file mode 100644
index 0000000..46736518
--- /dev/null
+++ b/net/openvswitch/dp_notify.c
@@ -0,0 +1,66 @@
+/*
+ * Copyright (c) 2007-2011 Nicira Networks.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of version 2 of the GNU General Public
+ * License as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+ * 02110-1301, USA
+ */
+
+#include <linux/netdevice.h>
+#include <net/genetlink.h>
+
+#include "datapath.h"
+#include "vport-internal_dev.h"
+#include "vport-netdev.h"
+
+static int dp_device_event(struct notifier_block *unused, unsigned long event,
+ void *ptr)
+{
+ struct net_device *dev = ptr;
+ struct vport *vport;
+
+ if (ovs_is_internal_dev(dev))
+ vport = ovs_internal_dev_get_vport(dev);
+ else
+ vport = ovs_netdev_get_vport(dev);
+
+ if (!vport)
+ return NOTIFY_DONE;
+
+ switch (event) {
+ case NETDEV_UNREGISTER:
+ if (!ovs_is_internal_dev(dev)) {
+ struct sk_buff *notify;
+
+ notify = ovs_vport_cmd_build_info(vport, 0, 0,
+ OVS_VPORT_CMD_DEL);
+ ovs_dp_detach_port(vport);
+ if (IS_ERR(notify)) {
+ netlink_set_err(init_net.genl_sock, 0,
+ ovs_dp_vport_multicast_group.id,
+ PTR_ERR(notify));
+ break;
+ }
+
+ genlmsg_multicast(notify, 0, ovs_dp_vport_multicast_group.id,
+ GFP_KERNEL);
+ }
+ break;
+ }
+
+ return NOTIFY_DONE;
+}
+
+struct notifier_block ovs_dp_device_notifier = {
+ .notifier_call = dp_device_event
+};
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