1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3 * Copyright (c) 2007-2012 Nicira, Inc.
4 */
5
6 #include <linux/netdevice.h>
7 #include <net/genetlink.h>
8 #include <net/netns/generic.h>
9
10 #include "datapath.h"
11 #include "vport-internal_dev.h"
12 #include "vport-netdev.h"
13
14 static void dp_detach_port_notify(struct vport *vport)
15 {
16 struct sk_buff *notify;
17 struct datapath *dp;
18
19 dp = vport->dp;
20 notify = ovs_vport_cmd_build_info(vport, ovs_dp_get_net(dp),
21 0, 0, OVS_VPORT_CMD_DEL);
22 ovs_dp_detach_port(vport);
23 if (IS_ERR(notify)) {
24 genl_set_err(&dp_vport_genl_family, ovs_dp_get_net(dp), 0,
25 0, PTR_ERR(notify));
26 return;
27 }
28
29 genlmsg_multicast_netns(&dp_vport_genl_family,
30 ovs_dp_get_net(dp), notify, 0,
31 0, GFP_KERNEL);
32 }
33
34 void ovs_dp_notify_wq(struct work_struct *work)
35 {
36 struct ovs_net *ovs_net = container_of(work, struct ovs_net, dp_notify_work);
37 struct datapath *dp;
38
39 ovs_lock();
40 list_for_each_entry(dp, &ovs_net->dps, list_node) {
41 int i;
42
43 for (i = 0; i < DP_VPORT_HASH_BUCKETS; i++) {
44 struct vport *vport;
45 struct hlist_node *n;
46
47 hlist_for_each_entry_safe(vport, n, &dp->ports[i], dp_hash_node) {
48 if (vport->ops->type == OVS_VPORT_TYPE_INTERNAL)
49 continue;
50
51 if (!(netif_is_ovs_port(vport->dev)))
52 dp_detach_port_notify(vport);
53 }
54 }
55 }
56 ovs_unlock();
57 }
58
59 static int dp_device_event(struct notifier_block *unused, unsigned long event,
60 void *ptr)
61 {
62 struct ovs_net *ovs_net;
63 struct net_device *dev = netdev_notifier_info_to_dev(ptr);
64 struct vport *vport = NULL;
65
66 if (!ovs_is_internal_dev(dev))
67 vport = ovs_netdev_get_vport(dev);
68
69 if (!vport)
70 return NOTIFY_DONE;
71
72 if (event == NETDEV_UNREGISTER) {
73 /* upper_dev_unlink and decrement promisc immediately */
74 ovs_netdev_detach_dev(vport);
75
76 /* schedule vport destroy, dev_put and genl notification */
77 ovs_net = net_generic(dev_net(dev), ovs_net_id);
78 queue_work(system_wq, &ovs_net->dp_notify_work);
79 }
80
81 return NOTIFY_DONE;
82 }
83
84 struct notifier_block ovs_dp_device_notifier = {
85 .notifier_call = dp_device_event
86 };
87
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