/* According to comments in the declaration of struct net_device, this function
* is "Called from unregister, can be used to call free_netdev". Ok then...
*/
static void hsr_dev_destroy(struct net_device *hsr_dev)
{
struct hsr_priv *hsr;
struct hsr_port *port;
hsr = netdev_priv(hsr_dev);
rtnl_lock();
hsr_for_each_port(hsr, port)
hsr_del_port(port);
rtnl_unlock();
del_timer_sync(&hsr->prune_timer);
del_timer_sync(&hsr->announce_timer);
synchronize_rcu();
}
static netdev_features_t hsr_features_recompute(struct hsr_priv *hsr,
netdev_features_t features)
{
netdev_features_t mask;
struct hsr_port *port;
mask = features;
/* Mask out all features that, if supported by one device, should be
* enabled for all devices (see NETIF_F_ONE_FOR_ALL).
*
* Anything that's off in mask will not be enabled - so only things
* that were in features originally, and also is in NETIF_F_ONE_FOR_ALL,
* may become enabled.
*/
features &= ~NETIF_F_ONE_FOR_ALL;
hsr_for_each_port(hsr, port)
features = netdev_increment_features(features,
port->dev->features,
mask);
return features;
}
int hsr_dev_finalize(struct net_device *hsr_dev, struct net_device *slave[2],
unsigned char multicast_spec, u8 protocol_version)
{
struct hsr_priv *hsr;
struct hsr_port *port;
int res;
hsr = netdev_priv(hsr_dev);
INIT_LIST_HEAD(&hsr->ports);
INIT_LIST_HEAD(&hsr->node_db);
INIT_LIST_HEAD(&hsr->self_node_db);
ether_addr_copy(hsr_dev->dev_addr, slave[0]->dev_addr);
/* Make sure we recognize frames from ourselves in hsr_rcv() */
res = hsr_create_self_node(&hsr->self_node_db, hsr_dev->dev_addr,
slave[1]->dev_addr);
if (res < 0)
return res;
spin_lock_init(&hsr->seqnr_lock);
/* Overflow soon to find bugs easier: */
hsr->sequence_nr = HSR_SEQNR_START;
hsr->sup_sequence_nr = HSR_SUP_SEQNR_START;
init_timer(&hsr->announce_timer);
hsr->announce_timer.function = hsr_announce;
hsr->announce_timer.data = (unsigned long) hsr;
init_timer(&hsr->prune_timer);
hsr->prune_timer.function = hsr_prune_nodes;
hsr->prune_timer.data = (unsigned long) hsr;
ether_addr_copy(hsr->sup_multicast_addr, def_multicast_addr);
hsr->sup_multicast_addr[ETH_ALEN - 1] = multicast_spec;
hsr->protVersion = protocol_version;
/* FIXME: should I modify the value of these?
*
* - hsr_dev->flags - i.e.
* IFF_MASTER/SLAVE?
* - hsr_dev->priv_flags - i.e.
* IFF_EBRIDGE?
* IFF_TX_SKB_SHARING?
* IFF_HSR_MASTER/SLAVE?
*/
/* Make sure the 1st call to netif_carrier_on() gets through */
netif_carrier_off(hsr_dev);
res = hsr_add_port(hsr, hsr_dev, HSR_PT_MASTER);
if (res)
return res;
res = register_netdevice(hsr_dev);
if (res)
goto fail;
res = hsr_add_port(hsr, slave[0], HSR_PT_SLAVE_A);
if (res)
goto fail;
res = hsr_add_port(hsr, slave[1], HSR_PT_SLAVE_B);
if (res)
goto fail;
hsr->prune_timer.expires = jiffies + msecs_to_jiffies(PRUNE_PERIOD);
add_timer(&hsr->prune_timer);
return 0;
fail:
hsr_for_each_port(hsr, port)
hsr_del_port(port);
return res;
}
