forked from luck/tmp_suning_uos_patched
e0a4b99773
netdev_upper_dev_link() is useful to manage lower/upper interfaces. And this function internally validates looping, maximum depth. All or most virtual interfaces that could have a real interface (e.g. macsec, macvlan, ipvlan etc.) use lower/upper infrastructure. Signed-off-by: Taehee Yoo <ap420073@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
137 lines
3.1 KiB
C
137 lines
3.1 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/* Copyright 2011-2014 Autronica Fire and Security AS
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*
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* Author(s):
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* 2011-2014 Arvid Brodin, arvid.brodin@alten.se
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*/
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#include <linux/netdevice.h>
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#include <linux/rculist.h>
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#include <linux/timer.h>
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#include <linux/etherdevice.h>
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#include "hsr_main.h"
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#include "hsr_device.h"
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#include "hsr_netlink.h"
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#include "hsr_framereg.h"
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#include "hsr_slave.h"
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static int hsr_netdev_notify(struct notifier_block *nb, unsigned long event,
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void *ptr)
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{
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struct net_device *dev;
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struct hsr_port *port, *master;
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struct hsr_priv *hsr;
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int mtu_max;
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int res;
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dev = netdev_notifier_info_to_dev(ptr);
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port = hsr_port_get_rtnl(dev);
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if (!port) {
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if (!is_hsr_master(dev))
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return NOTIFY_DONE; /* Not an HSR device */
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hsr = netdev_priv(dev);
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port = hsr_port_get_hsr(hsr, HSR_PT_MASTER);
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if (!port) {
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/* Resend of notification concerning removed device? */
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return NOTIFY_DONE;
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}
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} else {
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hsr = port->hsr;
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}
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switch (event) {
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case NETDEV_UP: /* Administrative state DOWN */
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case NETDEV_DOWN: /* Administrative state UP */
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case NETDEV_CHANGE: /* Link (carrier) state changes */
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hsr_check_carrier_and_operstate(hsr);
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break;
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case NETDEV_CHANGENAME:
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if (is_hsr_master(dev))
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hsr_debugfs_rename(dev);
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break;
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case NETDEV_CHANGEADDR:
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if (port->type == HSR_PT_MASTER) {
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/* This should not happen since there's no
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* ndo_set_mac_address() for HSR devices - i.e. not
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* supported.
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*/
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break;
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}
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master = hsr_port_get_hsr(hsr, HSR_PT_MASTER);
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if (port->type == HSR_PT_SLAVE_A) {
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ether_addr_copy(master->dev->dev_addr, dev->dev_addr);
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call_netdevice_notifiers(NETDEV_CHANGEADDR,
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master->dev);
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}
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/* Make sure we recognize frames from ourselves in hsr_rcv() */
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port = hsr_port_get_hsr(hsr, HSR_PT_SLAVE_B);
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res = hsr_create_self_node(hsr,
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master->dev->dev_addr,
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port ?
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port->dev->dev_addr :
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master->dev->dev_addr);
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if (res)
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netdev_warn(master->dev,
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"Could not update HSR node address.\n");
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break;
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case NETDEV_CHANGEMTU:
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if (port->type == HSR_PT_MASTER)
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break; /* Handled in ndo_change_mtu() */
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mtu_max = hsr_get_max_mtu(port->hsr);
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master = hsr_port_get_hsr(port->hsr, HSR_PT_MASTER);
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master->dev->mtu = mtu_max;
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break;
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case NETDEV_UNREGISTER:
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if (!is_hsr_master(dev))
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hsr_del_port(port);
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break;
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case NETDEV_PRE_TYPE_CHANGE:
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/* HSR works only on Ethernet devices. Refuse slave to change
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* its type.
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*/
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return NOTIFY_BAD;
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}
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return NOTIFY_DONE;
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}
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struct hsr_port *hsr_port_get_hsr(struct hsr_priv *hsr, enum hsr_port_type pt)
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{
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struct hsr_port *port;
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hsr_for_each_port(hsr, port)
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if (port->type == pt)
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return port;
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return NULL;
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}
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static struct notifier_block hsr_nb = {
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.notifier_call = hsr_netdev_notify, /* Slave event notifications */
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};
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static int __init hsr_init(void)
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{
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int res;
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BUILD_BUG_ON(sizeof(struct hsr_tag) != HSR_HLEN);
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register_netdevice_notifier(&hsr_nb);
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res = hsr_netlink_init();
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return res;
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}
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static void __exit hsr_exit(void)
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{
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unregister_netdevice_notifier(&hsr_nb);
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hsr_netlink_exit();
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hsr_debugfs_remove_root();
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}
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module_init(hsr_init);
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module_exit(hsr_exit);
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MODULE_LICENSE("GPL");
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