diff options
| author | Alan Ott <alan@signal11.us> | 2012-09-01 05:57:07 +0000 |
|---|---|---|
| committer | David S. Miller <davem@tempietto.lan> | 2012-09-01 22:48:02 -0400 |
| commit | a2dc375e12334b3d8f787a48b2fb6172ccfb80ae (patch) | |
| tree | 82caa348d85c5470deec9e4505695a9e58f99601 | |
| parent | a437d2744b0a4e5f405f6b9be284eb9e0a2d7741 (diff) | |
6lowpan: handle NETDEV_UNREGISTER event
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>
| -rw-r--r-- | net/ieee802154/6lowpan.c | 44 |
1 files changed, 37 insertions, 7 deletions
diff --git a/net/ieee802154/6lowpan.c b/net/ieee802154/6lowpan.c index b28ec790c7c8..d5291113584f 100644 --- a/net/ieee802154/6lowpan.c +++ b/net/ieee802154/6lowpan.c @@ -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. |