From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from metis.ext.4.pengutronix.de ([92.198.50.35]:35762 "EHLO metis.ext.4.pengutronix.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1757443AbcDGSyg (ORCPT ); Thu, 7 Apr 2016 14:54:36 -0400 From: Alexander Aring Subject: [RFCv2 bluetooth-next 12/21] 6lowpan: add private neighbour data Date: Thu, 7 Apr 2016 20:54:13 +0200 Message-Id: <1460055262-4330-13-git-send-email-aar@pengutronix.de> In-Reply-To: <1460055262-4330-1-git-send-email-aar@pengutronix.de> References: <1460055262-4330-1-git-send-email-aar@pengutronix.de> Sender: linux-wpan-owner@vger.kernel.org List-ID: To: linux-wpan@vger.kernel.org Cc: kernel@pengutronix.de, jukka.rissanen@linux.intel.com, hannes@stressinduktion.org, stefan@osg.samsung.com, mcr@sandelman.ca, werner@almesberger.net, Alexander Aring 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. Signed-off-by: Alexander Aring --- include/linux/netdevice.h | 3 +-- include/net/6lowpan.h | 24 ++++++++++++++++++++++++ net/bluetooth/6lowpan.c | 2 ++ net/ieee802154/6lowpan/core.c | 12 ++++++++++++ 4 files changed, 39 insertions(+), 2 deletions(-) diff --git a/include/linux/netdevice.h b/include/linux/netdevice.h index be693b3..26e1c8f 100644 --- a/include/linux/netdevice.h +++ b/include/linux/netdevice.h @@ -1478,8 +1478,7 @@ 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..61c6517 100644 --- a/include/net/6lowpan.h +++ b/include/net/6lowpan.h @@ -98,6 +98,9 @@ static inline bool lowpan_is_iphc(u8 dispatch) #define LOWPAN_PRIV_SIZE(llpriv_size) \ (sizeof(struct lowpan_dev) + llpriv_size) +#define LOWPAN_NEIGH_PRIV_SIZE(llneigh_priv_size) \ + (sizeof(struct lowpan_neigh) + llneigh_priv_size) + enum lowpan_lltypes { LOWPAN_LLTYPE_BTLE, LOWPAN_LLTYPE_IEEE802154, @@ -141,6 +144,27 @@ struct lowpan_dev { u8 priv[0] __aligned(sizeof(void *)); }; +struct lowpan_neigh { + /* 6LoWPAN neigh private data */ + /* must be last */ + u8 priv[0] __aligned(sizeof(void *)); +}; + +struct lowpan_802154_neigh { + __le16 short_addr; +}; + +static inline struct lowpan_neigh *lowpan_neigh(void *neigh_priv) +{ + return neigh_priv; +} + +static inline +struct lowpan_802154_neigh *lowpan_802154_neigh(void *neigh_priv) +{ + return (struct lowpan_802154_neigh *)lowpan_neigh(neigh_priv)->priv; +} + static inline struct lowpan_dev *lowpan_dev(const struct net_device *dev) { diff --git a/net/bluetooth/6lowpan.c b/net/bluetooth/6lowpan.c index 38e82dd..b7c4efa 100644 --- a/net/bluetooth/6lowpan.c +++ b/net/bluetooth/6lowpan.c @@ -833,6 +833,8 @@ static int setup_netdev(struct l2cap_chan *chan, struct lowpan_btle_dev **dev) list_add_rcu(&(*dev)->list, &bt_6lowpan_devices); spin_unlock(&devices_lock); + netdev->neigh_priv_len = LOWPAN_NEIGH_PRIV_SIZE(0); + err = lowpan_register_netdev(netdev, LOWPAN_LLTYPE_BTLE); if (err < 0) { BT_INFO("register_netdev failed %d", err); diff --git a/net/ieee802154/6lowpan/core.c b/net/ieee802154/6lowpan/core.c index dd085db..3162632 100644 --- a/net/ieee802154/6lowpan/core.c +++ b/net/ieee802154/6lowpan/core.c @@ -92,11 +92,21 @@ 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) @@ -161,6 +171,8 @@ 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 = LOWPAN_NEIGH_PRIV_SIZE(sizeof(struct lowpan_802154_neigh)); + ret = lowpan_register_netdevice(ldev, LOWPAN_LLTYPE_IEEE802154); if (ret < 0) { dev_put(wdev); -- 2.8.0