From patchwork Wed Sep 27 16:47:04 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Miquel Raynal X-Patchwork-Id: 13401413 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 5420EE82CB0 for ; Wed, 27 Sep 2023 16:47:27 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229484AbjI0Qr0 (ORCPT ); Wed, 27 Sep 2023 12:47:26 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:40598 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229476AbjI0Qr0 (ORCPT ); Wed, 27 Sep 2023 12:47:26 -0400 Received: from relay5-d.mail.gandi.net (relay5-d.mail.gandi.net [217.70.183.197]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 65DC091; Wed, 27 Sep 2023 09:47:24 -0700 (PDT) Received: by mail.gandi.net (Postfix) with ESMTPSA id 3E70A1C0006; Wed, 27 Sep 2023 16:47:20 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=bootlin.com; s=gm1; t=1695833243; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=DQh+VL37lttml5PY/RZhphyyTOjmlGUq3/JRTV8uL1c=; b=QlwE6x3CQEKPOS28jI0vcQ3tGM0k0Lm56o1Bh0FEZ98n8wTVB9+jrilEMguqWKYsDe5qaG xzNBJdbSWPt5Pwx1vU3np8j4Qnb1sQOvpwWD5+bgyqwHytFY7Cdl+VnzRVkAjtp8FQ4wke HPqmdEujtBzY229Ru7UA11U9a+4h5CFewPY1XDHTOBCcOqWKRhVnERU+wIqCPnf5VgChyA a7FbqioD6C3LeKwpCN7mQ/Cwh0/254QhkB+E0KFLQHfbcvjcJROODpTRlO9ckU8/yU9WhK 5UU6+nno+6mVWFDq1HT9H1nElBD6rKlA6UeWMNaTbDKZMX44TNXwhHNbWTHiFA== From: Miquel Raynal To: Alexander Aring , Stefan Schmidt , linux-wpan@vger.kernel.org Cc: "David S. Miller" , Jakub Kicinski , Paolo Abeni , Eric Dumazet , netdev@vger.kernel.org, David Girault , Romuald Despres , Frederic Blain , Nicolas Schodet , Guilhem Imberton , Thomas Petazzoni , Miquel Raynal Subject: [PATCH wpan-next v5 01/11] ieee802154: Let PAN IDs be reset Date: Wed, 27 Sep 2023 18:47:04 +0200 Message-Id: <20230927164714.128476-2-miquel.raynal@bootlin.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20230927164714.128476-1-miquel.raynal@bootlin.com> References: <20230927164714.128476-1-miquel.raynal@bootlin.com> MIME-Version: 1.0 X-GND-Sasl: miquel.raynal@bootlin.com Precedence: bulk List-ID: X-Mailing-List: linux-wpan@vger.kernel.org Soon association and disassociation will be implemented, which will require to be able to either change the PAN ID from 0xFFFF to a real value when association succeeded, or to reset the PAN ID to 0xFFFF upon disassociation. Let's allow to do that manually for now. Signed-off-by: Miquel Raynal --- net/ieee802154/nl802154.c | 10 ---------- 1 file changed, 10 deletions(-) diff --git a/net/ieee802154/nl802154.c b/net/ieee802154/nl802154.c index d610c1886160..46ac6f599fe1 100644 --- a/net/ieee802154/nl802154.c +++ b/net/ieee802154/nl802154.c @@ -1087,16 +1087,6 @@ static int nl802154_set_pan_id(struct sk_buff *skb, struct genl_info *info) pan_id = nla_get_le16(info->attrs[NL802154_ATTR_PAN_ID]); - /* TODO - * I am not sure about to check here on broadcast pan_id. - * Broadcast is a valid setting, comment from 802.15.4: - * If this value is 0xffff, the device is not associated. - * - * This could useful to simple deassociate an device. - */ - if (pan_id == cpu_to_le16(IEEE802154_PAN_ID_BROADCAST)) - return -EINVAL; - return rdev_set_pan_id(rdev, wpan_dev, pan_id); } From patchwork Wed Sep 27 16:47:05 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Miquel Raynal X-Patchwork-Id: 13401414 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 44B5EE82CB1 for ; Wed, 27 Sep 2023 16:47:38 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229543AbjI0Qrh (ORCPT ); Wed, 27 Sep 2023 12:47:37 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:60218 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229538AbjI0Qrg (ORCPT ); Wed, 27 Sep 2023 12:47:36 -0400 Received: from relay5-d.mail.gandi.net (relay5-d.mail.gandi.net [217.70.183.197]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id B701EDD; Wed, 27 Sep 2023 09:47:33 -0700 (PDT) Received: by mail.gandi.net (Postfix) with ESMTPSA id 651E31C000B; Wed, 27 Sep 2023 16:47:23 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=bootlin.com; s=gm1; t=1695833252; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=4rtPivLzSckdytkanfMdxzHo6R/q5hrYYlGBT9vCarQ=; b=bnHsLz0YPjMOlvpd2zfOJNW87qUaC+MSchAjRW6lSAadUw3QzIY3PgDQW5zCJ0LvCQ+TWb //qICuGaX4wE+o20/gTcXLFkWqSMIEpmypMLZ6NfUITBmjuAgnBwWmL4B/F9sceghNjBie Z0SXeUxG44qf9MtarXTDUalPEMgol94MxdjhdwFfT/LsXcW/wxneXxPl18r115vFPnl0mn 1ZwoDt2dVyWYxwkMheFx6lWJYdsMQe1owx78Z8ZJRtJ6ah3J52/2hprT+PB0cwrMj8o28z n0QhI5anGgKYHp59QG1zwB6ZWUrjHais0Vgpv2w+mv+2WXOLVgQRojTjmzHnvw== From: Miquel Raynal To: Alexander Aring , Stefan Schmidt , linux-wpan@vger.kernel.org Cc: "David S. Miller" , Jakub Kicinski , Paolo Abeni , Eric Dumazet , netdev@vger.kernel.org, David Girault , Romuald Despres , Frederic Blain , Nicolas Schodet , Guilhem Imberton , Thomas Petazzoni , Miquel Raynal Subject: [PATCH wpan-next v5 02/11] ieee802154: Internal PAN management Date: Wed, 27 Sep 2023 18:47:05 +0200 Message-Id: <20230927164714.128476-3-miquel.raynal@bootlin.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20230927164714.128476-1-miquel.raynal@bootlin.com> References: <20230927164714.128476-1-miquel.raynal@bootlin.com> MIME-Version: 1.0 X-GND-Sasl: miquel.raynal@bootlin.com Precedence: bulk List-ID: X-Mailing-List: linux-wpan@vger.kernel.org Introduce structures to describe peer devices in a PAN as well as a few related helpers. We basically care about: - Our unique parent after associating with a coordinator. - Peer devices, children, which successfully associated with us. Signed-off-by: Miquel Raynal --- include/net/cfg802154.h | 47 ++++++++++++++++++++++++++++++ net/ieee802154/Makefile | 2 +- net/ieee802154/core.c | 2 ++ net/ieee802154/pan.c | 63 +++++++++++++++++++++++++++++++++++++++++ 4 files changed, 113 insertions(+), 1 deletion(-) create mode 100644 net/ieee802154/pan.c diff --git a/include/net/cfg802154.h b/include/net/cfg802154.h index f79ce133e51a..a89f1c9cea3f 100644 --- a/include/net/cfg802154.h +++ b/include/net/cfg802154.h @@ -303,6 +303,22 @@ struct ieee802154_coord_desc { bool gts_permit; }; +/** + * struct ieee802154_pan_device - PAN device information + * @pan_id: the PAN ID of this device + * @mode: the preferred mode to reach the device + * @short_addr: the short address of this device + * @extended_addr: the extended address of this device + * @node: the list node + */ +struct ieee802154_pan_device { + __le16 pan_id; + u8 mode; + __le16 short_addr; + __le64 extended_addr; + struct list_head node; +}; + /** * struct cfg802154_scan_request - Scan request * @@ -478,6 +494,11 @@ struct wpan_dev { /* fallback for acknowledgment bit setting */ bool ackreq; + + /* Associations */ + struct mutex association_lock; + struct ieee802154_pan_device *parent; + struct list_head children; }; #define to_phy(_dev) container_of(_dev, struct wpan_phy, dev) @@ -529,4 +550,30 @@ static inline const char *wpan_phy_name(struct wpan_phy *phy) void ieee802154_configure_durations(struct wpan_phy *phy, unsigned int page, unsigned int channel); +/** + * cfg802154_device_is_associated - Checks whether we are associated to any device + * @wpan_dev: the wpan device + * @return: true if we are associated + */ +bool cfg802154_device_is_associated(struct wpan_dev *wpan_dev); + +/** + * cfg802154_device_is_parent - Checks if a device is our coordinator + * @wpan_dev: the wpan device + * @target: the expected parent + * @return: true if @target is our coordinator + */ +bool cfg802154_device_is_parent(struct wpan_dev *wpan_dev, + struct ieee802154_addr *target); + +/** + * cfg802154_device_is_child - Checks whether a device is associated to us + * @wpan_dev: the wpan device + * @target: the expected child + * @return: the PAN device + */ +struct ieee802154_pan_device * +cfg802154_device_is_child(struct wpan_dev *wpan_dev, + struct ieee802154_addr *target); + #endif /* __NET_CFG802154_H */ diff --git a/net/ieee802154/Makefile b/net/ieee802154/Makefile index f05b7bdae2aa..7bce67673e83 100644 --- a/net/ieee802154/Makefile +++ b/net/ieee802154/Makefile @@ -4,7 +4,7 @@ obj-$(CONFIG_IEEE802154_SOCKET) += ieee802154_socket.o obj-y += 6lowpan/ ieee802154-y := netlink.o nl-mac.o nl-phy.o nl_policy.o core.o \ - header_ops.o sysfs.o nl802154.o trace.o + header_ops.o sysfs.o nl802154.o trace.o pan.o ieee802154_socket-y := socket.o CFLAGS_trace.o := -I$(src) diff --git a/net/ieee802154/core.c b/net/ieee802154/core.c index 57546e07e06a..cd69bdbfd59f 100644 --- a/net/ieee802154/core.c +++ b/net/ieee802154/core.c @@ -276,6 +276,8 @@ static int cfg802154_netdev_notifier_call(struct notifier_block *nb, wpan_dev->identifier = ++rdev->wpan_dev_id; list_add_rcu(&wpan_dev->list, &rdev->wpan_dev_list); rdev->devlist_generation++; + mutex_init(&wpan_dev->association_lock); + INIT_LIST_HEAD(&wpan_dev->children); wpan_dev->netdev = dev; break; diff --git a/net/ieee802154/pan.c b/net/ieee802154/pan.c new file mode 100644 index 000000000000..2b30e7b19ac3 --- /dev/null +++ b/net/ieee802154/pan.c @@ -0,0 +1,63 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * IEEE 802.15.4 PAN management + * + * Copyright (C) 2023 Qorvo US, Inc + * Authors: + * - David Girault + * - Miquel Raynal + */ + +#include +#include +#include + +/* Checks whether a device address matches one from the PAN list. + * This helper is meant to be used only during PAN management, when we expect + * extended addresses to be used. + */ +static bool cfg802154_pan_device_is_matching(struct ieee802154_pan_device *pan_dev, + struct ieee802154_addr *ext_dev) +{ + if (!pan_dev || !ext_dev) + return false; + + if (ext_dev->mode == IEEE802154_ADDR_SHORT) + return false; + + return pan_dev->extended_addr == ext_dev->extended_addr; +} + +bool cfg802154_device_is_associated(struct wpan_dev *wpan_dev) +{ + bool is_assoc; + + mutex_lock(&wpan_dev->association_lock); + is_assoc = !list_empty(&wpan_dev->children) || wpan_dev->parent; + mutex_unlock(&wpan_dev->association_lock); + + return is_assoc; +} + +bool cfg802154_device_is_parent(struct wpan_dev *wpan_dev, + struct ieee802154_addr *target) +{ + lockdep_assert_held(&wpan_dev->association_lock); + + return cfg802154_pan_device_is_matching(wpan_dev->parent, target); +} + +struct ieee802154_pan_device * +cfg802154_device_is_child(struct wpan_dev *wpan_dev, + struct ieee802154_addr *target) +{ + struct ieee802154_pan_device *child; + + lockdep_assert_held(&wpan_dev->association_lock); + + list_for_each_entry(child, &wpan_dev->children, node) + if (cfg802154_pan_device_is_matching(child, target)) + return child; + + return NULL; +}