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path: root/net/ieee802154/6lowpan/core.c
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Diffstat (limited to 'net/ieee802154/6lowpan/core.c')
-rw-r--r--net/ieee802154/6lowpan/core.c126
1 files changed, 68 insertions, 58 deletions
diff --git a/net/ieee802154/6lowpan/core.c b/net/ieee802154/6lowpan/core.c
index 953b1c49f5d1..20c49c724ba0 100644
--- a/net/ieee802154/6lowpan/core.c
+++ b/net/ieee802154/6lowpan/core.c
@@ -61,7 +61,7 @@ static struct header_ops lowpan_header_ops = {
static struct lock_class_key lowpan_tx_busylock;
static struct lock_class_key lowpan_netdev_xmit_lock_key;
-static void lowpan_set_lockdep_class_one(struct net_device *dev,
+static void lowpan_set_lockdep_class_one(struct net_device *ldev,
struct netdev_queue *txq,
void *_unused)
{
@@ -69,35 +69,47 @@ static void lowpan_set_lockdep_class_one(struct net_device *dev,
&lowpan_netdev_xmit_lock_key);
}
-static int lowpan_dev_init(struct net_device *dev)
+static int lowpan_dev_init(struct net_device *ldev)
{
- netdev_for_each_tx_queue(dev, lowpan_set_lockdep_class_one, NULL);
- dev->qdisc_tx_busylock = &lowpan_tx_busylock;
+ netdev_for_each_tx_queue(ldev, lowpan_set_lockdep_class_one, NULL);
+ ldev->qdisc_tx_busylock = &lowpan_tx_busylock;
+ return 0;
+}
+
+static int lowpan_open(struct net_device *dev)
+{
+ if (!open_count)
+ lowpan_rx_init();
+ open_count++;
+ return 0;
+}
+
+static int lowpan_stop(struct net_device *dev)
+{
+ open_count--;
+ if (!open_count)
+ lowpan_rx_exit();
return 0;
}
static const struct net_device_ops lowpan_netdev_ops = {
.ndo_init = lowpan_dev_init,
.ndo_start_xmit = lowpan_xmit,
+ .ndo_open = lowpan_open,
+ .ndo_stop = lowpan_stop,
};
-static void lowpan_setup(struct net_device *dev)
+static void lowpan_setup(struct net_device *ldev)
{
- dev->addr_len = IEEE802154_ADDR_LEN;
- memset(dev->broadcast, 0xff, IEEE802154_ADDR_LEN);
- dev->type = ARPHRD_6LOWPAN;
- /* Frame Control + Sequence Number + Address fields + Security Header */
- dev->hard_header_len = 2 + 1 + 20 + 14;
- dev->needed_tailroom = 2; /* FCS */
- dev->mtu = IPV6_MIN_MTU;
- dev->priv_flags |= IFF_NO_QUEUE;
- dev->flags = IFF_BROADCAST | IFF_MULTICAST;
- dev->watchdog_timeo = 0;
-
- dev->netdev_ops = &lowpan_netdev_ops;
- dev->header_ops = &lowpan_header_ops;
- dev->destructor = free_netdev;
- dev->features |= NETIF_F_NETNS_LOCAL;
+ memset(ldev->broadcast, 0xff, IEEE802154_ADDR_LEN);
+ /* We need an ipv6hdr as minimum len when calling xmit */
+ ldev->hard_header_len = sizeof(struct ipv6hdr);
+ ldev->flags = IFF_BROADCAST | IFF_MULTICAST;
+
+ ldev->netdev_ops = &lowpan_netdev_ops;
+ ldev->header_ops = &lowpan_header_ops;
+ ldev->destructor = free_netdev;
+ ldev->features |= NETIF_F_NETNS_LOCAL;
}
static int lowpan_validate(struct nlattr *tb[], struct nlattr *data[])
@@ -109,10 +121,10 @@ static int lowpan_validate(struct nlattr *tb[], struct nlattr *data[])
return 0;
}
-static int lowpan_newlink(struct net *src_net, struct net_device *dev,
+static int lowpan_newlink(struct net *src_net, struct net_device *ldev,
struct nlattr *tb[], struct nlattr *data[])
{
- struct net_device *real_dev;
+ struct net_device *wdev;
int ret;
ASSERT_RTNL();
@@ -120,58 +132,56 @@ static int lowpan_newlink(struct net *src_net, struct net_device *dev,
pr_debug("adding new link\n");
if (!tb[IFLA_LINK] ||
- !net_eq(dev_net(dev), &init_net))
+ !net_eq(dev_net(ldev), &init_net))
return -EINVAL;
- /* find and hold real wpan device */
- real_dev = dev_get_by_index(dev_net(dev), nla_get_u32(tb[IFLA_LINK]));
- if (!real_dev)
+ /* find and hold wpan device */
+ wdev = dev_get_by_index(dev_net(ldev), nla_get_u32(tb[IFLA_LINK]));
+ if (!wdev)
return -ENODEV;
- if (real_dev->type != ARPHRD_IEEE802154) {
- dev_put(real_dev);
+ if (wdev->type != ARPHRD_IEEE802154) {
+ dev_put(wdev);
return -EINVAL;
}
- if (real_dev->ieee802154_ptr->lowpan_dev) {
- dev_put(real_dev);
+ if (wdev->ieee802154_ptr->lowpan_dev) {
+ dev_put(wdev);
return -EBUSY;
}
- lowpan_dev_info(dev)->real_dev = real_dev;
+ lowpan_dev_info(ldev)->wdev = wdev;
/* Set the lowpan hardware address to the wpan hardware address. */
- memcpy(dev->dev_addr, real_dev->dev_addr, IEEE802154_ADDR_LEN);
-
- lowpan_netdev_setup(dev, LOWPAN_LLTYPE_IEEE802154);
-
- ret = register_netdevice(dev);
+ memcpy(ldev->dev_addr, wdev->dev_addr, IEEE802154_ADDR_LEN);
+ /* We need headroom for possible wpan_dev_hard_header call and tailroom
+ * for encryption/fcs handling. The lowpan interface will replace
+ * the IPv6 header with 6LoWPAN header. At worst case the 6LoWPAN
+ * header has LOWPAN_IPHC_MAX_HEADER_LEN more bytes than the IPv6
+ * header.
+ */
+ ldev->needed_headroom = LOWPAN_IPHC_MAX_HEADER_LEN +
+ wdev->needed_headroom;
+ ldev->needed_tailroom = wdev->needed_tailroom;
+
+ lowpan_netdev_setup(ldev, LOWPAN_LLTYPE_IEEE802154);
+
+ ret = register_netdevice(ldev);
if (ret < 0) {
- dev_put(real_dev);
+ dev_put(wdev);
return ret;
}
- real_dev->ieee802154_ptr->lowpan_dev = dev;
- if (!open_count)
- lowpan_rx_init();
-
- open_count++;
-
+ wdev->ieee802154_ptr->lowpan_dev = ldev;
return 0;
}
-static void lowpan_dellink(struct net_device *dev, struct list_head *head)
+static void lowpan_dellink(struct net_device *ldev, struct list_head *head)
{
- struct lowpan_dev_info *lowpan_dev = lowpan_dev_info(dev);
- struct net_device *real_dev = lowpan_dev->real_dev;
+ struct net_device *wdev = lowpan_dev_info(ldev)->wdev;
ASSERT_RTNL();
- open_count--;
-
- if (!open_count)
- lowpan_rx_exit();
-
- real_dev->ieee802154_ptr->lowpan_dev = NULL;
- unregister_netdevice(dev);
- dev_put(real_dev);
+ wdev->ieee802154_ptr->lowpan_dev = NULL;
+ unregister_netdevice(ldev);
+ dev_put(wdev);
}
static struct rtnl_link_ops lowpan_link_ops __read_mostly = {
@@ -196,9 +206,9 @@ static inline void lowpan_netlink_fini(void)
static int lowpan_device_event(struct notifier_block *unused,
unsigned long event, void *ptr)
{
- struct net_device *dev = netdev_notifier_info_to_dev(ptr);
+ struct net_device *wdev = netdev_notifier_info_to_dev(ptr);
- if (dev->type != ARPHRD_IEEE802154)
+ if (wdev->type != ARPHRD_IEEE802154)
goto out;
switch (event) {
@@ -207,8 +217,8 @@ static int lowpan_device_event(struct notifier_block *unused,
* also delete possible lowpan interfaces which belongs
* to the wpan interface.
*/
- if (dev->ieee802154_ptr && dev->ieee802154_ptr->lowpan_dev)
- lowpan_dellink(dev->ieee802154_ptr->lowpan_dev, NULL);
+ if (wdev->ieee802154_ptr->lowpan_dev)
+ lowpan_dellink(wdev->ieee802154_ptr->lowpan_dev, NULL);
break;
default:
break;
generated by cgit v1.2.3 (git 2.25.1) at 2024-04-19 14:08:07 +0000