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, ovs_dp_get_net(dp), 34 0, 0, 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 47 void 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 72 static 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 97 struct notifier_block ovs_dp_device_notifier = { 98 .notifier_call = dp_device_event 99 }; 100