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123 lines · 3.0 KiB

1// SPDX-License-Identifier: GPL-2.0-or-later
2/* Copyright Amazon.com Inc. or its affiliates. */
3
4#include <linux/init.h>
5#include <linux/netdevice.h>
6#include <linux/notifier.h>
7#include <linux/rtnetlink.h>
8#include <net/net_namespace.h>
9#include <net/netdev_lock.h>
10#include <net/netns/generic.h>
11
12int netdev_debug_event(struct notifier_block *nb, unsigned long event,
13 void *ptr)
14{
15 struct net_device *dev = netdev_notifier_info_to_dev(ptr);
16 struct net *net = dev_net(dev);
17 enum netdev_cmd cmd = event;
18
19 /* Keep enum and don't add default to trigger -Werror=switch */
20 switch (cmd) {
21 case NETDEV_XDP_FEAT_CHANGE:
22 netdev_assert_locked(dev);
23 fallthrough;
24 case NETDEV_CHANGE:
25 case NETDEV_REGISTER:
26 case NETDEV_UP:
27 case NETDEV_DOWN:
28 case NETDEV_GOING_DOWN:
29 netdev_assert_locked_ops_compat(dev);
30 fallthrough;
31 case NETDEV_REBOOT:
32 case NETDEV_UNREGISTER:
33 case NETDEV_CHANGEMTU:
34 case NETDEV_CHANGEADDR:
35 case NETDEV_PRE_CHANGEADDR:
36 case NETDEV_FEAT_CHANGE:
37 case NETDEV_BONDING_FAILOVER:
38 case NETDEV_PRE_UP:
39 case NETDEV_PRE_TYPE_CHANGE:
40 case NETDEV_POST_TYPE_CHANGE:
41 case NETDEV_POST_INIT:
42 case NETDEV_PRE_UNINIT:
43 case NETDEV_RELEASE:
44 case NETDEV_NOTIFY_PEERS:
45 case NETDEV_JOIN:
46 case NETDEV_CHANGEUPPER:
47 case NETDEV_RESEND_IGMP:
48 case NETDEV_PRECHANGEMTU:
49 case NETDEV_CHANGEINFODATA:
50 case NETDEV_BONDING_INFO:
51 case NETDEV_PRECHANGEUPPER:
52 case NETDEV_CHANGELOWERSTATE:
53 case NETDEV_UDP_TUNNEL_PUSH_INFO:
54 case NETDEV_UDP_TUNNEL_DROP_INFO:
55 case NETDEV_CHANGE_TX_QUEUE_LEN:
56 case NETDEV_CVLAN_FILTER_PUSH_INFO:
57 case NETDEV_CVLAN_FILTER_DROP_INFO:
58 case NETDEV_SVLAN_FILTER_PUSH_INFO:
59 case NETDEV_SVLAN_FILTER_DROP_INFO:
60 case NETDEV_OFFLOAD_XSTATS_ENABLE:
61 case NETDEV_OFFLOAD_XSTATS_DISABLE:
62 case NETDEV_OFFLOAD_XSTATS_REPORT_USED:
63 case NETDEV_OFFLOAD_XSTATS_REPORT_DELTA:
64 ASSERT_RTNL();
65 break;
66
67 case NETDEV_CHANGENAME:
68 netdev_assert_locked_ops(dev);
69 ASSERT_RTNL_NET(net);
70 break;
71 }
72
73 return NOTIFY_DONE;
74}
75EXPORT_SYMBOL_NS_GPL(netdev_debug_event, "NETDEV_INTERNAL");
76
77static int rtnl_net_debug_net_id;
78
79static int __net_init rtnl_net_debug_net_init(struct net *net)
80{
81 struct notifier_block *nb;
82
83 nb = net_generic(net, rtnl_net_debug_net_id);
84 nb->notifier_call = netdev_debug_event;
85
86 return register_netdevice_notifier_net(net, nb);
87}
88
89static void __net_exit rtnl_net_debug_net_exit(struct net *net)
90{
91 struct notifier_block *nb;
92
93 nb = net_generic(net, rtnl_net_debug_net_id);
94 unregister_netdevice_notifier_net(net, nb);
95}
96
97static struct pernet_operations rtnl_net_debug_net_ops __net_initdata = {
98 .init = rtnl_net_debug_net_init,
99 .exit = rtnl_net_debug_net_exit,
100 .id = &rtnl_net_debug_net_id,
101 .size = sizeof(struct notifier_block),
102};
103
104static struct notifier_block rtnl_net_debug_block = {
105 .notifier_call = netdev_debug_event,
106};
107
108static int __init rtnl_net_debug_init(void)
109{
110 int ret;
111
112 ret = register_pernet_subsys(&rtnl_net_debug_net_ops);
113 if (ret)
114 return ret;
115
116 ret = register_netdevice_notifier(&rtnl_net_debug_block);
117 if (ret)
118 unregister_pernet_subsys(&rtnl_net_debug_net_ops);
119
120 return ret;
121}
122
123subsys_initcall(rtnl_net_debug_init);