From patchwork Wed Aug 12 15:00:43 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: John Crispin X-Patchwork-Id: 11710935 X-Patchwork-Delegate: johannes@sipsolutions.net Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 6686013B1 for ; Wed, 12 Aug 2020 15:01:13 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 4F4542080C for ; Wed, 12 Aug 2020 15:01:13 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726676AbgHLPBL (ORCPT ); Wed, 12 Aug 2020 11:01:11 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:51352 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726558AbgHLPBA (ORCPT ); Wed, 12 Aug 2020 11:01:00 -0400 Received: from nbd.name (nbd.name [IPv6:2a01:4f8:221:3d45::2]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 6CDE9C061384 for ; Wed, 12 Aug 2020 08:01:00 -0700 (PDT) Received: from [149.224.82.90] (helo=localhost.localdomain) by ds12 with esmtpa (Exim 4.89) (envelope-from ) id 1k5sFN-0002OP-Fk; Wed, 12 Aug 2020 17:00:57 +0200 From: John Crispin To: Johannes Berg Cc: linux-wireless@vger.kernel.org, ath11k@lists.infradead.org, John Crispin Subject: [PATCH V3 2/9] mac80211: add multiple bssid support to interface handling Date: Wed, 12 Aug 2020 17:00:43 +0200 Message-Id: <20200812150050.2683396-3-john@phrozen.org> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20200812150050.2683396-1-john@phrozen.org> References: <20200812150050.2683396-1-john@phrozen.org> MIME-Version: 1.0 Sender: linux-wireless-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-wireless@vger.kernel.org When bringing up multi bssid APs we need to track the parent-child relation of non-transmitting and transmitting VAPs. This patch checks the above by using a linked list to track the relations. The patch also ensures that when a non-transmitting interface is closed the transmitting one is also closed. Signed-off-by: John Crispin --- include/net/mac80211.h | 13 +++++++++- net/mac80211/cfg.c | 54 ++++++++++++++++++++++++++++++++++++++++++ net/mac80211/debugfs.c | 1 + net/mac80211/iface.c | 7 ++++++ 4 files changed, 74 insertions(+), 1 deletion(-) diff --git a/include/net/mac80211.h b/include/net/mac80211.h index f0ae718633d2..b409a5f1026c 100644 --- a/include/net/mac80211.h +++ b/include/net/mac80211.h @@ -1649,6 +1649,9 @@ enum ieee80211_vif_flags { * write-protected by sdata_lock and local->mtx so holding either is fine * for read access. * @cca_color: the color that we will have after the change. + * @multiple_bssid.parent: a non-transmitted bssid has a transmitted parent. + * @multiple_bssid.list: linked list for tracking parent - child relations. + * @multiple_bssid.non_transmitted: Is this a non-transmitted bssi */ struct ieee80211_vif { enum nl80211_iftype type; @@ -1675,6 +1678,11 @@ struct ieee80211_vif { bool rx_mcast_action_reg; bool txqs_stopped[IEEE80211_NUM_ACS]; + struct { + struct ieee80211_vif *parent; + struct list_head list; + bool non_transmitted; + } multiple_bssid; bool cca_active; u8 cca_color; @@ -2326,7 +2334,7 @@ struct ieee80211_txq { * @IEEE80211_HW_TX_STATUS_NO_AMPDU_LEN: Driver does not report accurate A-MPDU * length in tx status information * - * @IEEE80211_HW_SUPPORTS_MULTI_BSSID: Hardware supports multi BSSID + * @IEEE80211_HW_SUPPORTS_MULTI_BSSID: Hardware supports multi BSSID in STA mode * * @IEEE80211_HW_SUPPORTS_ONLY_HE_MULTI_BSSID: Hardware supports multi BSSID * only for HE APs. Applies if @IEEE80211_HW_SUPPORTS_MULTI_BSSID is set. @@ -2335,6 +2343,8 @@ struct ieee80211_txq { * aggregating MPDUs with the same keyid, allowing mac80211 to keep Tx * A-MPDU sessions active while rekeying with Extended Key ID. * + * @IEEE80211_HW_SUPPORTS_MULTI_BSSID_AP: Hardware supports multi BSSID in AP mode + * * @NUM_IEEE80211_HW_FLAGS: number of hardware flags, used for sizing arrays */ enum ieee80211_hw_flags { @@ -2387,6 +2397,7 @@ enum ieee80211_hw_flags { IEEE80211_HW_SUPPORTS_MULTI_BSSID, IEEE80211_HW_SUPPORTS_ONLY_HE_MULTI_BSSID, IEEE80211_HW_AMPDU_KEYBORDER_SUPPORT, + IEEE80211_HW_SUPPORTS_MULTI_BSSID_AP, /* keep last, obviously */ NUM_IEEE80211_HW_FLAGS diff --git a/net/mac80211/cfg.c b/net/mac80211/cfg.c index 37a218b89c9a..50a219d8a2cc 100644 --- a/net/mac80211/cfg.c +++ b/net/mac80211/cfg.c @@ -111,6 +111,36 @@ static int ieee80211_set_mon_options(struct ieee80211_sub_if_data *sdata, return 0; } +static int ieee80211_set_multiple_bssid_options(struct ieee80211_sub_if_data *sdata, + struct vif_params *params) +{ + struct ieee80211_local *local = sdata->local; + struct wiphy *wiphy = local->hw.wiphy; + struct net_device *parent; + struct ieee80211_sub_if_data *psdata; + + if (!ieee80211_hw_check(&local->hw, SUPPORTS_MULTI_BSSID_AP)) + return 0; + + if (params->multiple_bssid.non_transmitted) { + parent = __dev_get_by_index(wiphy_net(wiphy), + params->multiple_bssid.parent); + if (!parent || !parent->ieee80211_ptr) + return -EINVAL; + psdata = IEEE80211_WDEV_TO_SUB_IF(parent->ieee80211_ptr); + if (psdata->vif.multiple_bssid.non_transmitted) + return -EINVAL; + sdata->vif.multiple_bssid.parent = &psdata->vif; + list_add(&sdata->vif.multiple_bssid.list, + &psdata->vif.multiple_bssid.list); + sdata->vif.multiple_bssid.non_transmitted = true; + } else { + INIT_LIST_HEAD(&sdata->vif.multiple_bssid.list); + } + + return 0; +} + static struct wireless_dev *ieee80211_add_iface(struct wiphy *wiphy, const char *name, unsigned char name_assign_type, @@ -136,11 +166,35 @@ static struct wireless_dev *ieee80211_add_iface(struct wiphy *wiphy, } } + if (type == NL80211_IFTYPE_AP) { + err = ieee80211_set_multiple_bssid_options(sdata, params); + if (err) { + ieee80211_if_remove(sdata); + return NULL; + } + } + return wdev; } static int ieee80211_del_iface(struct wiphy *wiphy, struct wireless_dev *wdev) { + struct ieee80211_sub_if_data *sdata; + struct ieee80211_vif *child, *tmp; + + sdata = IEEE80211_WDEV_TO_SUB_IF(wdev); + if (sdata->vif.type == NL80211_IFTYPE_AP) { + if (!sdata->vif.multiple_bssid.non_transmitted) { + if (!list_empty(&sdata->vif.multiple_bssid.list)) + list_for_each_entry_safe(child, tmp, + &sdata->vif.multiple_bssid.list, + multiple_bssid.list) + dev_close(vif_to_sdata(child)->wdev.netdev); + } else { + list_del(&sdata->vif.multiple_bssid.list); + } + } + ieee80211_if_remove(IEEE80211_WDEV_TO_SUB_IF(wdev)); return 0; diff --git a/net/mac80211/debugfs.c b/net/mac80211/debugfs.c index 54080290d6e2..5d5c9185755a 100644 --- a/net/mac80211/debugfs.c +++ b/net/mac80211/debugfs.c @@ -408,6 +408,7 @@ static const char *hw_flag_names[] = { FLAG(SUPPORTS_MULTI_BSSID), FLAG(SUPPORTS_ONLY_HE_MULTI_BSSID), FLAG(AMPDU_KEYBORDER_SUPPORT), + FLAG(SUPPORTS_MULTI_BSSID_AP), #undef FLAG }; diff --git a/net/mac80211/iface.c b/net/mac80211/iface.c index 8060cdc102d4..e6397d0c788d 100644 --- a/net/mac80211/iface.c +++ b/net/mac80211/iface.c @@ -810,6 +810,13 @@ static void ieee80211_do_stop(struct ieee80211_sub_if_data *sdata, bool cancel_scan; struct cfg80211_nan_func *func; + if (sdata->vif.type == NL80211_IFTYPE_AP && + sdata->vif.multiple_bssid.non_transmitted) + /* make sure the parent is already down */ + if (sdata->vif.multiple_bssid.parent && + ieee80211_sdata_running(vif_to_sdata(sdata->vif.multiple_bssid.parent))) + dev_close(vif_to_sdata(sdata->vif.multiple_bssid.parent)->wdev.netdev); + clear_bit(SDATA_STATE_RUNNING, &sdata->state); cancel_scan = rcu_access_pointer(local->scan_sdata) == sdata;