From patchwork Tue Mar 22 13:15:08 2016 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Alexander Aring X-Patchwork-Id: 8642351 Return-Path: X-Original-To: patchwork-linux-wpan@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork2.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.29.136]) by patchwork2.web.kernel.org (Postfix) with ESMTP id CC24EC0553 for ; Tue, 22 Mar 2016 13:16:02 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id C1173201EF for ; Tue, 22 Mar 2016 13:16:01 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id BD8D9202A1 for ; Tue, 22 Mar 2016 13:16:00 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1758917AbcCVNPr (ORCPT ); Tue, 22 Mar 2016 09:15:47 -0400 Received: from metis.ext.4.pengutronix.de ([92.198.50.35]:60807 "EHLO metis.ext.4.pengutronix.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1758923AbcCVNPo (ORCPT ); Tue, 22 Mar 2016 09:15:44 -0400 Received: from gallifrey.ext.pengutronix.de ([2001:67c:670:201:5054:ff:fe8d:eefb] helo=omega.localdomain) by metis.ext.pengutronix.de with esmtp (Exim 4.80) (envelope-from ) id 1aiM9u-0008Dt-Vu; Tue, 22 Mar 2016 14:15:43 +0100 From: Alexander Aring 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 Subject: [RFC bluetooth-next 12/19] 6lowpan: add private neighbour data Date: Tue, 22 Mar 2016 14:15:08 +0100 Message-Id: <1458652515-7862-13-git-send-email-aar@pengutronix.de> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1458652515-7862-1-git-send-email-aar@pengutronix.de> References: <1458652515-7862-1-git-send-email-aar@pengutronix.de> X-SA-Exim-Connect-IP: 2001:67c:670:201:5054:ff:fe8d:eefb X-SA-Exim-Mail-From: aar@pengutronix.de X-SA-Exim-Scanned: No (on metis.ext.pengutronix.de); SAEximRunCond expanded to false X-PTX-Original-Recipient: linux-wpan@vger.kernel.org Sender: linux-wpan-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-wpan@vger.kernel.org X-Spam-Status: No, score=-6.9 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_HI, T_RP_MATCHES_RCVD, UNPARSEABLE_RELAY autolearn=ham version=3.3.1 X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on mail.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP 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 4e465c7..5784db7 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);