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6lowpan: handle NETDEV_UNREGISTER event

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Before, it was impossible to remove a wpan device which had lowpan
attached to it.

Signed-off-by: Alan Ott <alan@signal11.us>
Signed-off-by: David S. Miller <davem@tempietto.lan>
This commit is contained in:
Alan Ott 2012-09-01 05:57:07 +00:00 committed by David S. Miller
parent a437d2744b
commit a2dc375e12
1 changed files with 37 additions and 7 deletions
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44
net/ieee802154/6lowpan.c
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@ -1063,12 +1063,6 @@ out:
return (err < 0 ? NETDEV_TX_BUSY : NETDEV_TX_OK);
}
static void lowpan_dev_free(struct net_device *dev)
{
dev_put(lowpan_dev_info(dev)->real_dev);
free_netdev(dev);
}
static struct wpan_phy *lowpan_get_phy(const struct net_device *dev)
{
struct net_device *real_dev = lowpan_dev_info(dev)->real_dev;
@ -1118,7 +1112,7 @@ static void lowpan_setup(struct net_device *dev)
dev->netdev_ops = &lowpan_netdev_ops;
dev->header_ops = &lowpan_header_ops;
dev->ml_priv = &lowpan_mlme;
dev->destructor = lowpan_dev_free;
dev->destructor = free_netdev;
}
static int lowpan_validate(struct nlattr *tb[], struct nlattr *data[])
@ -1244,6 +1238,34 @@ static inline void __init lowpan_netlink_fini(void)
rtnl_link_unregister(&lowpan_link_ops);
}
static int lowpan_device_event(struct notifier_block *unused,
unsigned long event,
void *ptr)
{
struct net_device *dev = ptr;
LIST_HEAD(del_list);
struct lowpan_dev_record *entry, *tmp;
if (dev->type != ARPHRD_IEEE802154)
goto out;
if (event == NETDEV_UNREGISTER) {
list_for_each_entry_safe(entry, tmp, &lowpan_devices, list) {
if (lowpan_dev_info(entry->ldev)->real_dev == dev)
lowpan_dellink(entry->ldev, &del_list);
}
unregister_netdevice_many(&del_list);
};
out:
return NOTIFY_DONE;
}
static struct notifier_block lowpan_dev_notifier = {
.notifier_call = lowpan_device_event,
};
static struct packet_type lowpan_packet_type = {
.type = __constant_htons(ETH_P_IEEE802154),
.func = lowpan_rcv,
@ -1258,6 +1280,12 @@ static int __init lowpan_init_module(void)
goto out;
dev_add_pack(&lowpan_packet_type);
err = register_netdevice_notifier(&lowpan_dev_notifier);
if (err < 0) {
dev_remove_pack(&lowpan_packet_type);
lowpan_netlink_fini();
}
out:
return err;
}
@ -1270,6 +1298,8 @@ static void __exit lowpan_cleanup_module(void)
dev_remove_pack(&lowpan_packet_type);
unregister_netdevice_notifier(&lowpan_dev_notifier);
/* Now 6lowpan packet_type is removed, so no new fragments are
* expected on RX, therefore that's the time to clean incomplete
* fragments.