5113f6f70
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kernel add
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/* Copyright 2011-2014 Autronica Fire and Security AS
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the Free
* Software Foundation; either version 2 of the License, or (at your option)
* any later version.
*
* Author(s):
* 2011-2014 Arvid Brodin, arvid.brodin@alten.se
*/
#include <linux/netdevice.h>
#include <linux/rculist.h>
#include <linux/timer.h>
#include <linux/etherdevice.h>
#include "hsr_prp_main.h"
#include "hsr_prp_device.h"
#include "hsr_netlink.h"
#include "hsr_prp_framereg.h"
#include "hsr_prp_slave.h"
static struct notifier_block hsr_nb = {
.notifier_call = hsr_prp_netdev_notify, /* Slave event notifications */
};
static struct notifier_block prp_nb = {
.notifier_call = hsr_prp_netdev_notify, /* Slave event notifications */
};
int hsr_prp_netdev_notify(struct notifier_block *nb, unsigned long event,
void *ptr)
{
struct net_device *dev;
struct hsr_prp_port *port, *master;
struct hsr_prp_priv *priv;
int mtu_max;
int res;
dev = netdev_notifier_info_to_dev(ptr);
port = hsr_prp_port_get_rtnl(dev);
if (!port) {
if (!is_hsr_prp_master(dev))
return NOTIFY_DONE; /* Not an HSR device */
priv = netdev_priv(dev);
port = hsr_prp_get_port(priv, HSR_PRP_PT_MASTER);
if (!port) {
/* Resend of notification concerning removed device? */
return NOTIFY_DONE;
}
} else {
priv = port->priv;
}
if ((priv->prot_version <= HSR_V1) &&
(nb != &hsr_nb))
return NOTIFY_DONE;
else if ((priv->prot_version == PRP_V1) &&
(nb != &prp_nb))
return NOTIFY_DONE;
switch (event) {
case NETDEV_UP: /* Administrative state DOWN */
case NETDEV_DOWN: /* Administrative state UP */
case NETDEV_CHANGE: /* Link (carrier) state changes */
hsr_prp_check_carrier_and_operstate(priv);
break;
case NETDEV_CHANGEADDR:
if (port->type == HSR_PRP_PT_MASTER) {
/* This should not happen since there's no
* ndo_set_mac_address() for HSR devices - i.e. not
* supported.
*/
break;
}
master = hsr_prp_get_port(priv, HSR_PRP_PT_MASTER);
if (port->type == HSR_PRP_PT_SLAVE_A) {
ether_addr_copy(master->dev->dev_addr, dev->dev_addr);
call_netdevice_notifiers(NETDEV_CHANGEADDR,
master->dev);
}
/* Make sure we recognize frames from ourselves in hsr_rcv() */
port = hsr_prp_get_port(priv, HSR_PRP_PT_SLAVE_B);
res = hsr_prp_create_self_node(&priv->self_node_db,
master->dev->dev_addr,
port ?
port->dev->dev_addr :
master->dev->dev_addr);
if (res)
netdev_warn(master->dev,
"Could not update HSR node address.
");
break;
case NETDEV_CHANGEMTU:
if (port->type == HSR_PRP_PT_MASTER)
break; /* Handled in ndo_change_mtu() */
mtu_max = hsr_prp_get_max_mtu(port->priv);
master = hsr_prp_get_port(port->priv, HSR_PRP_PT_MASTER);
master->dev->mtu = mtu_max;
break;
case NETDEV_UNREGISTER:
hsr_prp_del_port(port);
break;
case NETDEV_PRE_TYPE_CHANGE:
/* HSR works only on Ethernet devices. Refuse slave to change
* its type.
*/
return NOTIFY_BAD;
}
return NOTIFY_DONE;
}
struct hsr_prp_port *hsr_prp_get_port(struct hsr_prp_priv *priv,
enum hsr_prp_port_type pt)
{
struct hsr_prp_port *port;
hsr_prp_for_each_port(priv, port)
if (port->type == pt)
return port;
return NULL;
}
int hsr_prp_register_notifier(u8 proto)
{
if (proto == PRP)
return register_netdevice_notifier(&prp_nb);
return register_netdevice_notifier(&hsr_nb);
}
void hsr_prp_unregister_notifier(u8 proto)
{
if (proto == PRP)
unregister_netdevice_notifier(&prp_nb);
unregister_netdevice_notifier(&hsr_nb);
}
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