LXR linux/net/openvswitch/dp

   1/*
   2 * Copyright (c) 2007-2012 Nicira, Inc.
   3 *
   4 * This program is free software; you can redistribute it and/or
   5 * modify it under the terms of version 2 of the GNU General Public
   6 * License as published by the Free Software Foundation.
   7 *
   8 * This program is distributed in the hope that it will be useful, but
   9 * WITHOUT ANY WARRANTY; without even the implied warranty of
  10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  11 * General Public License for more details.
  12 *
  13 * You should have received a copy of the GNU General Public License
  14 * along with this program; if not, write to the Free Software
  15 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
  16 * 02110-1301, USA
  17 */
  18
  19#include <linux/netdevice.h>
  20#include <net/genetlink.h>
  21#include <net/netns/generic.h>
  22
  23#include "datapath.h"
  24#include "vport-internal_dev.h"
  25#include "vport-netdev.h"
  26
  27static void dp_detach_port_notify(struct vport *vport)
  28{
  29        struct sk_buff *notify;
  30        struct datapath *dp;
  31
  32        dp = vport->dp;
  33        notify = ovs_vport_cmd_build_info(vport, 0, 0,
  34                                          OVS_VPORT_CMD_DEL);
  35        ovs_dp_detach_port(vport);
  36        if (IS_ERR(notify)) {
  37                genl_set_err(&dp_vport_genl_family, ovs_dp_get_net(dp), 0,
  38                             0, PTR_ERR(notify));
  39                return;
  40        }
  41
  42        genlmsg_multicast_netns(&dp_vport_genl_family,
  43                                ovs_dp_get_net(dp), notify, 0,
  44                                0, GFP_KERNEL);
  45}
  46
  47void ovs_dp_notify_wq(struct work_struct *work)
  48{
  49        struct ovs_net *ovs_net = container_of(work, struct ovs_net, dp_notify_work);
  50        struct datapath *dp;
  51
  52        ovs_lock();
  53        list_for_each_entry(dp, &ovs_net->dps, list_node) {
  54                int i;
  55
  56                for (i = 0; i < DP_VPORT_HASH_BUCKETS; i++) {
  57                        struct vport *vport;
  58                        struct hlist_node *n;
  59
  60                        hlist_for_each_entry_safe(vport, n, &dp->ports[i], dp_hash_node) {
  61                                if (vport->ops->type == OVS_VPORT_TYPE_INTERNAL)
  62                                        continue;
  63
  64                                if (!(vport->dev->priv_flags & IFF_OVS_DATAPATH))
  65                                        dp_detach_port_notify(vport);
  66                        }
  67                }
  68        }
  69        ovs_unlock();
  70}
  71
  72static int dp_device_event(struct notifier_block *unused, unsigned long event,
  73                           void *ptr)
  74{
  75        struct ovs_net *ovs_net;
  76        struct net_device *dev = netdev_notifier_info_to_dev(ptr);
  77        struct vport *vport = NULL;
  78
  79        if (!ovs_is_internal_dev(dev))
  80                vport = ovs_netdev_get_vport(dev);
  81
  82        if (!vport)
  83                return NOTIFY_DONE;
  84
  85        if (event == NETDEV_UNREGISTER) {
  86                /* upper_dev_unlink and decrement promisc immediately */
  87                ovs_netdev_detach_dev(vport);
  88
  89                /* schedule vport destroy, dev_put and genl notification */
  90                ovs_net = net_generic(dev_net(dev), ovs_net_id);
  91                queue_work(system_wq, &ovs_net->dp_notify_work);
  92        }
  93
  94        return NOTIFY_DONE;
  95}
  96
  97struct notifier_block ovs_dp_device_notifier = {
  98        .notifier_call = dp_device_event
  99};
 100