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 27 static 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 netlink_set_err(ovs_dp_get_net(dp)->genl_sock, 0, 38 ovs_dp_vport_multicast_group.id, 39 PTR_ERR(notify)); 40 return; 41 } 42 43 genlmsg_multicast_netns(ovs_dp_get_net(dp), notify, 0, 44 ovs_dp_vport_multicast_group.id, 45 GFP_KERNEL); 46 } 47 48 void ovs_dp_notify_wq(struct work_struct *work) 49 { 50 struct ovs_net *ovs_net = container_of(work, struct ovs_net, dp_notify_work); 51 struct datapath *dp; 52 53 ovs_lock(); 54 list_for_each_entry(dp, &ovs_net->dps, list_node) { 55 int i; 56 57 for (i = 0; i < DP_VPORT_HASH_BUCKETS; i++) { 58 struct vport *vport; 59 struct hlist_node *n; 60 61 hlist_for_each_entry_safe(vport, n, &dp->ports[i], dp_hash_node) { 62 struct netdev_vport *netdev_vport; 63 64 if (vport->ops->type != OVS_VPORT_TYPE_NETDEV) 65 continue; 66 67 netdev_vport = netdev_vport_priv(vport); 68 if (!(netdev_vport->dev->priv_flags & IFF_OVS_DATAPATH)) 69 dp_detach_port_notify(vport); 70 } 71 } 72 } 73 ovs_unlock(); 74 } 75 76 static int dp_device_event(struct notifier_block *unused, unsigned long event, 77 void *ptr) 78 { 79 struct ovs_net *ovs_net; 80 struct net_device *dev = netdev_notifier_info_to_dev(ptr); 81 struct vport *vport = NULL; 82 83 if (!ovs_is_internal_dev(dev)) 84 vport = ovs_netdev_get_vport(dev); 85 86 if (!vport) 87 return NOTIFY_DONE; 88 89 if (event == NETDEV_UNREGISTER) { 90 /* upper_dev_unlink and decrement promisc immediately */ 91 ovs_netdev_detach_dev(vport); 92 93 /* schedule vport destroy, dev_put and genl notification */ 94 ovs_net = net_generic(dev_net(dev), ovs_net_id); 95 queue_work(system_wq, &ovs_net->dp_notify_work); 96 } 97 98 return NOTIFY_DONE; 99 } 100 101 struct notifier_block ovs_dp_device_notifier = { 102 .notifier_call = dp_device_event 103 }; 104