Add the rt linux 4.1.3-rt3 as base

[kvmfornfv.git] / kernel / net / openvswitch / dp_notify.c

diff --git a/kernel/net/openvswitch/dp_notify.c b/kernel/net/openvswitch/dp_notify.c
new file mode 100644 (file)
index 0000000..2c631fe
--- /dev/null
+++ b/kernel/net/openvswitch/dp_notify.c
@@ -0,0 +1,102 @@
+/*
+ * Copyright (c) 2007-2012 Nicira, Inc.
+ *
+ * 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 <net/netns/generic.h>
+
+#include "datapath.h"
+#include "vport-internal_dev.h"
+#include "vport-netdev.h"
+
+static void dp_detach_port_notify(struct vport *vport)
+{
+       struct sk_buff *notify;
+       struct datapath *dp;
+
+       dp = vport->dp;
+       notify = ovs_vport_cmd_build_info(vport, 0, 0,
+                                         OVS_VPORT_CMD_DEL);
+       ovs_dp_detach_port(vport);
+       if (IS_ERR(notify)) {
+               genl_set_err(&dp_vport_genl_family, ovs_dp_get_net(dp), 0,
+                            0, PTR_ERR(notify));
+               return;
+       }
+
+       genlmsg_multicast_netns(&dp_vport_genl_family,
+                               ovs_dp_get_net(dp), notify, 0,
+                               0, GFP_KERNEL);
+}
+
+void ovs_dp_notify_wq(struct work_struct *work)
+{
+       struct ovs_net *ovs_net = container_of(work, struct ovs_net, dp_notify_work);
+       struct datapath *dp;
+
+       ovs_lock();
+       list_for_each_entry(dp, &ovs_net->dps, list_node) {
+               int i;
+
+               for (i = 0; i < DP_VPORT_HASH_BUCKETS; i++) {
+                       struct vport *vport;
+                       struct hlist_node *n;
+
+                       hlist_for_each_entry_safe(vport, n, &dp->ports[i], dp_hash_node) {
+                               struct netdev_vport *netdev_vport;
+
+                               if (vport->ops->type != OVS_VPORT_TYPE_NETDEV)
+                                       continue;
+
+                               netdev_vport = netdev_vport_priv(vport);
+                               if (!(netdev_vport->dev->priv_flags & IFF_OVS_DATAPATH))
+                                       dp_detach_port_notify(vport);
+                       }
+               }
+       }
+       ovs_unlock();
+}
+
+static int dp_device_event(struct notifier_block *unused, unsigned long event,
+                          void *ptr)
+{
+       struct ovs_net *ovs_net;
+       struct net_device *dev = netdev_notifier_info_to_dev(ptr);
+       struct vport *vport = NULL;
+
+       if (!ovs_is_internal_dev(dev))
+               vport = ovs_netdev_get_vport(dev);
+
+       if (!vport)
+               return NOTIFY_DONE;
+
+       if (event == NETDEV_UNREGISTER) {
+               /* upper_dev_unlink and decrement promisc immediately */
+               ovs_netdev_detach_dev(vport);
+
+               /* schedule vport destroy, dev_put and genl notification */
+               ovs_net = net_generic(dev_net(dev), ovs_net_id);
+               queue_work(system_wq, &ovs_net->dp_notify_work);
+       }
+
+       return NOTIFY_DONE;
+}
+
+struct notifier_block ovs_dp_device_notifier = {
+       .notifier_call = dp_device_event
+};