Alexander Aring wrote:
> This patch will introduce a 6lowpan neighbour private data. Like the
> interface private data we handle private data for generic 6lowpan and
> for link-layer specific 6lowpan.
>
> The current first use case if to save the short address for a 802.15.4
> 6lowpan neighbour.
>
> Cc: David S. Miller <davem@xxxxxxxxxxxxx>
> Reviewed-by: Stefan Schmidt <stefan@xxxxxxxxxxxxxxx>
> Signed-off-by: Alexander Aring <aar@xxxxxxxxxxxxxx>
Acked-by: YOSHIFUJI Hideaki <yoshfuji@xxxxxxxxxxxxxx>
> ---
> include/linux/netdevice.h | 3 +--
> include/net/6lowpan.h | 10 ++++++++++
> net/ieee802154/6lowpan/core.c | 12 ++++++++++++
> 3 files changed, 23 insertions(+), 2 deletions(-)
>
> diff --git a/include/linux/netdevice.h b/include/linux/netdevice.h
> index d101e4d..36e43bd 100644
> --- a/include/linux/netdevice.h
> +++ b/include/linux/netdevice.h
> @@ -1483,8 +1483,7 @@ enum netdev_priv_flags {
> * @perm_addr: Permanent hw address
> * @addr_assign_type: Hw address assignment type
> * @addr_len: Hardware address length
> - * @neigh_priv_len; Used in neigh_alloc(),
> - * initialized only in atm/clip.c
> + * @neigh_priv_len: Used in neigh_alloc()
> * @dev_id: Used to differentiate devices that share
> * the same link layer address
> * @dev_port: Used to differentiate devices that share
> diff --git a/include/net/6lowpan.h b/include/net/6lowpan.h
> index da84cf9..2d9b9d3 100644
> --- a/include/net/6lowpan.h
> +++ b/include/net/6lowpan.h
> @@ -141,6 +141,16 @@ struct lowpan_dev {
> u8 priv[0] __aligned(sizeof(void *));
> };
>
> +struct lowpan_802154_neigh {
> + __le16 short_addr;
> +};
> +
> +static inline
> +struct lowpan_802154_neigh *lowpan_802154_neigh(void *neigh_priv)
> +{
> + return neigh_priv;
> +}
> +
> static inline
> struct lowpan_dev *lowpan_dev(const struct net_device *dev)
> {
> diff --git a/net/ieee802154/6lowpan/core.c b/net/ieee802154/6lowpan/core.c
> index 4e2b308..8c004a0 100644
> --- a/net/ieee802154/6lowpan/core.c
> +++ b/net/ieee802154/6lowpan/core.c
> @@ -81,11 +81,21 @@ static int lowpan_stop(struct net_device *dev)
> return 0;
> }
>
> +static int lowpan_neigh_construct(struct neighbour *n)
> +{
> + struct lowpan_802154_neigh *neigh = lowpan_802154_neigh(neighbour_priv(n));
> +
> + /* default no short_addr is available for a neighbour */
> + neigh->short_addr = cpu_to_le16(IEEE802154_ADDR_SHORT_UNSPEC);
> + 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,
> + .ndo_neigh_construct = lowpan_neigh_construct,
> };
>
> static void lowpan_setup(struct net_device *ldev)
> @@ -150,6 +160,8 @@ static int lowpan_newlink(struct net *src_net, struct net_device *ldev,
> wdev->needed_headroom;
> ldev->needed_tailroom = wdev->needed_tailroom;
>
> + ldev->neigh_priv_len = sizeof(struct lowpan_802154_neigh);
> +
> ret = lowpan_register_netdevice(ldev, LOWPAN_LLTYPE_IEEE802154);
> if (ret < 0) {
> dev_put(wdev);
>
--
Hideaki Yoshifuji <hideaki.yoshifuji@xxxxxxxxxxxxxxxx>
Technical Division, MIRACLE LINUX CORPORATION
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