Commit 8626a0c8 authored by Alexander Aring's avatar Alexander Aring Committed by David S. Miller

6lowpan: add private neighbour data

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@davemloft.net>
Reviewed-by: default avatarStefan Schmidt <stefan@osg.samsung.com>
Acked-by: default avatarYOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org>
Signed-off-by: default avatarAlexander Aring <aar@pengutronix.de>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 60100978
...@@ -1483,8 +1483,7 @@ enum netdev_priv_flags { ...@@ -1483,8 +1483,7 @@ enum netdev_priv_flags {
* @perm_addr: Permanent hw address * @perm_addr: Permanent hw address
* @addr_assign_type: Hw address assignment type * @addr_assign_type: Hw address assignment type
* @addr_len: Hardware address length * @addr_len: Hardware address length
* @neigh_priv_len; Used in neigh_alloc(), * @neigh_priv_len: Used in neigh_alloc()
* initialized only in atm/clip.c
* @dev_id: Used to differentiate devices that share * @dev_id: Used to differentiate devices that share
* the same link layer address * the same link layer address
* @dev_port: Used to differentiate devices that share * @dev_port: Used to differentiate devices that share
......
...@@ -141,6 +141,16 @@ struct lowpan_dev { ...@@ -141,6 +141,16 @@ struct lowpan_dev {
u8 priv[0] __aligned(sizeof(void *)); 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 static inline
struct lowpan_dev *lowpan_dev(const struct net_device *dev) struct lowpan_dev *lowpan_dev(const struct net_device *dev)
{ {
......
...@@ -81,11 +81,21 @@ static int lowpan_stop(struct net_device *dev) ...@@ -81,11 +81,21 @@ static int lowpan_stop(struct net_device *dev)
return 0; 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 = { static const struct net_device_ops lowpan_netdev_ops = {
.ndo_init = lowpan_dev_init, .ndo_init = lowpan_dev_init,
.ndo_start_xmit = lowpan_xmit, .ndo_start_xmit = lowpan_xmit,
.ndo_open = lowpan_open, .ndo_open = lowpan_open,
.ndo_stop = lowpan_stop, .ndo_stop = lowpan_stop,
.ndo_neigh_construct = lowpan_neigh_construct,
}; };
static void lowpan_setup(struct net_device *ldev) static void lowpan_setup(struct net_device *ldev)
...@@ -150,6 +160,8 @@ static int lowpan_newlink(struct net *src_net, struct net_device *ldev, ...@@ -150,6 +160,8 @@ static int lowpan_newlink(struct net *src_net, struct net_device *ldev,
wdev->needed_headroom; wdev->needed_headroom;
ldev->needed_tailroom = wdev->needed_tailroom; ldev->needed_tailroom = wdev->needed_tailroom;
ldev->neigh_priv_len = sizeof(struct lowpan_802154_neigh);
ret = lowpan_register_netdevice(ldev, LOWPAN_LLTYPE_IEEE802154); ret = lowpan_register_netdevice(ldev, LOWPAN_LLTYPE_IEEE802154);
if (ret < 0) { if (ret < 0) {
dev_put(wdev); dev_put(wdev);
......
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