1 // SPDX-License-Identifier: GPL-2.0
2 /* Copyright 2011-2014 Autronica Fire and Security AS
5 * 2011-2014 Arvid Brodin, arvid.brodin@alten.se
8 #include <linux/netdevice.h>
9 #include <linux/rculist.h>
10 #include <linux/timer.h>
11 #include <linux/etherdevice.h>
13 #include "hsr_device.h"
14 #include "hsr_netlink.h"
15 #include "hsr_framereg.h"
16 #include "hsr_slave.h"
18 static int hsr_netdev_notify(struct notifier_block *nb, unsigned long event,
21 struct net_device *dev;
22 struct hsr_port *port, *master;
27 dev = netdev_notifier_info_to_dev(ptr);
28 port = hsr_port_get_rtnl(dev);
30 if (!is_hsr_master(dev))
31 return NOTIFY_DONE; /* Not an HSR device */
32 hsr = netdev_priv(dev);
33 port = hsr_port_get_hsr(hsr, HSR_PT_MASTER);
35 /* Resend of notification concerning removed device? */
43 case NETDEV_UP: /* Administrative state DOWN */
44 case NETDEV_DOWN: /* Administrative state UP */
45 case NETDEV_CHANGE: /* Link (carrier) state changes */
46 hsr_check_carrier_and_operstate(hsr);
48 case NETDEV_CHANGEADDR:
49 if (port->type == HSR_PT_MASTER) {
50 /* This should not happen since there's no
51 * ndo_set_mac_address() for HSR devices - i.e. not
57 master = hsr_port_get_hsr(hsr, HSR_PT_MASTER);
59 if (port->type == HSR_PT_SLAVE_A) {
60 ether_addr_copy(master->dev->dev_addr, dev->dev_addr);
61 call_netdevice_notifiers(NETDEV_CHANGEADDR,
65 /* Make sure we recognize frames from ourselves in hsr_rcv() */
66 port = hsr_port_get_hsr(hsr, HSR_PT_SLAVE_B);
67 res = hsr_create_self_node(&hsr->self_node_db,
68 master->dev->dev_addr,
71 master->dev->dev_addr);
73 netdev_warn(master->dev,
74 "Could not update HSR node address.\n");
76 case NETDEV_CHANGEMTU:
77 if (port->type == HSR_PT_MASTER)
78 break; /* Handled in ndo_change_mtu() */
79 mtu_max = hsr_get_max_mtu(port->hsr);
80 master = hsr_port_get_hsr(port->hsr, HSR_PT_MASTER);
81 master->dev->mtu = mtu_max;
83 case NETDEV_UNREGISTER:
86 case NETDEV_PRE_TYPE_CHANGE:
87 /* HSR works only on Ethernet devices. Refuse slave to change
96 struct hsr_port *hsr_port_get_hsr(struct hsr_priv *hsr, enum hsr_port_type pt)
98 struct hsr_port *port;
100 hsr_for_each_port(hsr, port)
101 if (port->type == pt)
106 static struct notifier_block hsr_nb = {
107 .notifier_call = hsr_netdev_notify, /* Slave event notifications */
110 static int __init hsr_init(void)
114 BUILD_BUG_ON(sizeof(struct hsr_tag) != HSR_HLEN);
116 register_netdevice_notifier(&hsr_nb);
117 res = hsr_netlink_init();
122 static void __exit hsr_exit(void)
124 unregister_netdevice_notifier(&hsr_nb);
128 module_init(hsr_init);
129 module_exit(hsr_exit);
130 MODULE_LICENSE("GPL");