| 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 | 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 | }; |