+.. SPDX-License-Identifier: GPL-2.0
-Netdev private dataroom for 6lowpan interfaces:
+==============================================
+Netdev private dataroom for 6lowpan interfaces
+==============================================
All 6lowpan able net devices, means all interfaces with ARPHRD_6LOWPAN,
must have "struct lowpan_priv" placed at beginning of netdev_priv.
-The priv_size of each interface should be calculate by:
+The priv_size of each interface should be calculate by::
dev->priv_size = LOWPAN_PRIV_SIZE(LL_6LOWPAN_PRIV_DATA);
Where LL_PRIV_6LOWPAN_DATA is sizeof linklayer 6lowpan private data struct.
-To access the LL_PRIV_6LOWPAN_DATA structure you can cast:
+To access the LL_PRIV_6LOWPAN_DATA structure you can cast::
lowpan_priv(dev)-priv;
to your LL_6LOWPAN_PRIV_DATA structure.
-Before registering the lowpan netdev interface you must run:
+Before registering the lowpan netdev interface you must run::
lowpan_netdev_setup(dev, LOWPAN_LLTYPE_FOOBAR);
wheres LOWPAN_LLTYPE_FOOBAR is a define for your 6LoWPAN linklayer type of
enum lowpan_lltypes.
-Example to evaluate the private usually you can do:
+Example to evaluate the private usually you can do::
-static inline struct lowpan_priv_foobar *
-lowpan_foobar_priv(struct net_device *dev)
-{
+ static inline struct lowpan_priv_foobar *
+ lowpan_foobar_priv(struct net_device *dev)
+ {
return (struct lowpan_priv_foobar *)lowpan_priv(dev)->priv;
-}
+ }
-switch (dev->type) {
-case ARPHRD_6LOWPAN:
+ switch (dev->type) {
+ case ARPHRD_6LOWPAN:
lowpan_priv = lowpan_priv(dev);
/* do great stuff which is ARPHRD_6LOWPAN related */
switch (lowpan_priv->lltype) {
...
}
break;
-...
-}
+ ...
+ }
In case of generic 6lowpan branch ("net/6lowpan") you can remove the check
on ARPHRD_6LOWPAN, because you can be sure that these function are called