From patchwork Thu May 23 10:09:49 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Johannes Berg X-Patchwork-Id: 798680 Received: from sipsolutions.net (s3.sipsolutions.net [168.119.38.16]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 1FBFD1448C9 for ; Thu, 23 May 2024 10:09:56 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=168.119.38.16 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1716458998; cv=none; b=qP06Wx5MSJZYbk4DKKTKSoHF+ZoINgEAqkY6ZWeBpP3WS45apLxII9NiJKWaMCEMI9ZEEXjpELEGWIo/pNqAGsTQHpfPUDDZWAx0QUzpIa6iG+1ytBZBYC5fzkZU8qjwyafEwS5+HH39TjYEDbc+cIoA87y/lNaY0617wpeIqjQ= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1716458998; c=relaxed/simple; bh=Yojg4/2cJQEBnbv9rkl+mbZjO9zQsAnc1vOIYxpTOms=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=UEXskcBU58f4Ad20D2toxk9U6Qx1prXT6Itk60NV+lSWUOoa5qyqpQA5ZOVkm0J+JEakgQh9d9Ir805FTtLjIuxUUAZ0bNTpze1aP68zh+TOzWeCnq1bomhkMowjL57vLkGtSu9okFBprTDDfKOaNP0p+8tDlkcnNDdLaZDJ/R4= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=sipsolutions.net; spf=pass smtp.mailfrom=sipsolutions.net; dkim=pass (2048-bit key) header.d=sipsolutions.net header.i=@sipsolutions.net header.b=VtoMAU/A; arc=none smtp.client-ip=168.119.38.16 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=sipsolutions.net Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=sipsolutions.net Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=sipsolutions.net header.i=@sipsolutions.net header.b="VtoMAU/A" DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=sipsolutions.net; s=mail; h=Content-Transfer-Encoding:MIME-Version: References:In-Reply-To:Message-ID:Date:Subject:Cc:To:From:Content-Type:Sender :Reply-To:Content-ID:Content-Description:Resent-Date:Resent-From:Resent-To: Resent-Cc:Resent-Message-ID; bh=pq1fukTBRBTSwtAr5BfNsLQfWEwt/a6s3UqV1nrYpr4=; t=1716458997; x=1717668597; b=VtoMAU/AZY/z0vPSf0LAZzPqTkHfy6EXYT68+A9auHMXzuL URMUbw0M+eQf2SDUk5cKxURn3/H7RMOdsn3hH/J3TA+0pVe8YjBuQqwfcxqV73AsEeOhXwwp9pu0p nMdYwWMT+RY0Y/OT10/h5Bihoau5HZ0em7FHC6VK2NGrS5pg1eUE950PutBRN8EhwwNH/Z1y1aY1j 2JI7Emog/vYSrTx3gX2XhADW0Xwjg8iflXkPLeaD+8ZAx6P+HqOehw8hAyv684vK7ev99a4+aM/Zn 9JDL7kDMDs1duO83wR7frz/jW2H8jmA/gW74jDNrCkPGcHNQ6Dzqwxyayr7e2Q3A==; Received: by sipsolutions.net with esmtpsa (TLS1.3:ECDHE_X25519__RSA_PSS_RSAE_SHA256__AES_256_GCM:256) (Exim 4.97) (envelope-from ) id 1sA5OU-00000005wvn-1jUc; Thu, 23 May 2024 12:09:54 +0200 From: Johannes Berg To: linux-wireless@vger.kernel.org Cc: Johannes Berg , Miriam Rachel Korenblit Subject: [PATCH 8/8] wifi: cfg80211: add regulatory flag to allow VLP AP operation Date: Thu, 23 May 2024 12:09:49 +0200 Message-ID: <20240523120945.63792ce19790.Ie2a02750d283b78fbf3c686b10565fb0388889e2@changeid> X-Mailer: git-send-email 2.45.1 In-Reply-To: <20240523120945.9a2c19a51e53.I50fa1b1a18b70f63a5095131ac23dc2e71f3d426@changeid> References: <20240523120945.9a2c19a51e53.I50fa1b1a18b70f63a5095131ac23dc2e71f3d426@changeid> Precedence: bulk X-Mailing-List: linux-wireless@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 From: Johannes Berg Add a regulatory flag to allow VLP AP operation even on channels otherwise marked NO_IR, which may be possible in some regulatory domains/countries. Note that this requires checking also when the beacon is changed, since that may change the regulatory power type. Reviewed-by: Miriam Rachel Korenblit Signed-off-by: Johannes Berg --- include/net/cfg80211.h | 6 ++++++ include/uapi/linux/nl80211.h | 6 ++++++ net/wireless/chan.c | 37 +++++++++++++++++++++++++----------- net/wireless/nl80211.c | 27 ++++++++++++++++++++++++-- net/wireless/reg.c | 2 ++ net/wireless/trace.h | 15 +++++++++------ 6 files changed, 74 insertions(+), 19 deletions(-) diff --git a/include/net/cfg80211.h b/include/net/cfg80211.h index dcb543344db6..3ae615e4cf20 100644 --- a/include/net/cfg80211.h +++ b/include/net/cfg80211.h @@ -125,6 +125,8 @@ struct wiphy; * @IEEE80211_CHAN_CAN_MONITOR: This channel can be used for monitor * mode even in the presence of other (regulatory) restrictions, * even if it is otherwise disabled. + * @IEEE80211_CHAN_ALLOW_6GHZ_VLP_AP: Allow using this channel for AP operation + * with very low power (VLP), even if otherwise set to NO_IR. */ enum ieee80211_channel_flags { IEEE80211_CHAN_DISABLED = BIT(0), @@ -152,6 +154,7 @@ enum ieee80211_channel_flags { IEEE80211_CHAN_NO_6GHZ_VLP_CLIENT = BIT(22), IEEE80211_CHAN_NO_6GHZ_AFC_CLIENT = BIT(23), IEEE80211_CHAN_CAN_MONITOR = BIT(24), + IEEE80211_CHAN_ALLOW_6GHZ_VLP_AP = BIT(25), }; #define IEEE80211_CHAN_NO_HT40 \ @@ -8806,9 +8809,12 @@ static inline void cfg80211_report_obss_beacon(struct wiphy *wiphy, * @relax: allow IR-relaxation conditions to apply (e.g. another * interface connected already on the same channel) * NOTE: If this is set, wiphy mutex must be held. + * @reg_power: &enum ieee80211_ap_reg_power value indicating the + * advertised/used 6 GHz regulatory power setting */ struct cfg80211_beaconing_check_config { enum nl80211_iftype iftype; + enum ieee80211_ap_reg_power reg_power; bool relax; }; diff --git a/include/uapi/linux/nl80211.h b/include/uapi/linux/nl80211.h index f917bc6c9b6f..6ae3997061b6 100644 --- a/include/uapi/linux/nl80211.h +++ b/include/uapi/linux/nl80211.h @@ -4277,6 +4277,8 @@ enum nl80211_wmm_rule { * @NL80211_FREQUENCY_ATTR_CAN_MONITOR: This channel can be used in monitor * mode despite other (regulatory) restrictions, even if the channel is * otherwise completely disabled. + * @NL80211_FREQUENCY_ATTR_ALLOW_6GHZ_VLP_AP: This channel can be used for a + * very low power (VLP) AP, despite being NO_IR. * @NL80211_FREQUENCY_ATTR_MAX: highest frequency attribute number * currently defined * @__NL80211_FREQUENCY_ATTR_AFTER_LAST: internal use @@ -4320,6 +4322,7 @@ enum nl80211_frequency_attr { NL80211_FREQUENCY_ATTR_NO_6GHZ_VLP_CLIENT, NL80211_FREQUENCY_ATTR_NO_6GHZ_AFC_CLIENT, NL80211_FREQUENCY_ATTR_CAN_MONITOR, + NL80211_FREQUENCY_ATTR_ALLOW_6GHZ_VLP_AP, /* keep last */ __NL80211_FREQUENCY_ATTR_AFTER_LAST, @@ -4529,6 +4532,8 @@ enum nl80211_sched_scan_match_attr { * Should be used together with %NL80211_RRF_DFS only. * @NL80211_RRF_NO_6GHZ_VLP_CLIENT: Client connection to VLP AP not allowed * @NL80211_RRF_NO_6GHZ_AFC_CLIENT: Client connection to AFC AP not allowed + * @NL80211_RRF_ALLOW_6GHZ_VLP_AP: Very low power (VLP) AP can be permitted + * despite NO_IR configuration. */ enum nl80211_reg_rule_flags { NL80211_RRF_NO_OFDM = 1<<0, @@ -4553,6 +4558,7 @@ enum nl80211_reg_rule_flags { NL80211_RRF_DFS_CONCURRENT = 1<<21, NL80211_RRF_NO_6GHZ_VLP_CLIENT = 1<<22, NL80211_RRF_NO_6GHZ_AFC_CLIENT = 1<<23, + NL80211_RRF_ALLOW_6GHZ_VLP_AP = 1<<24, }; #define NL80211_RRF_PASSIVE_SCAN NL80211_RRF_NO_IR diff --git a/net/wireless/chan.c b/net/wireless/chan.c index 8b1796130b28..bf2fdcd42019 100644 --- a/net/wireless/chan.c +++ b/net/wireless/chan.c @@ -1523,28 +1523,38 @@ static bool cfg80211_ir_permissive_chan(struct wiphy *wiphy, static bool _cfg80211_reg_can_beacon(struct wiphy *wiphy, struct cfg80211_chan_def *chandef, enum nl80211_iftype iftype, - bool check_no_ir) + u32 prohibited_flags, + u32 permitting_flags) { - bool res; - u32 prohibited_flags = IEEE80211_CHAN_DISABLED; + bool res, check_radar; int dfs_required; - trace_cfg80211_reg_can_beacon(wiphy, chandef, iftype, check_no_ir); + trace_cfg80211_reg_can_beacon(wiphy, chandef, iftype, + prohibited_flags, + permitting_flags); - if (check_no_ir) - prohibited_flags |= IEEE80211_CHAN_NO_IR; + if (!_cfg80211_chandef_usable(wiphy, chandef, + IEEE80211_CHAN_DISABLED, 0)) + return false; dfs_required = cfg80211_chandef_dfs_required(wiphy, chandef, iftype); - if (dfs_required != 0) - prohibited_flags |= IEEE80211_CHAN_RADAR; + check_radar = dfs_required != 0; if (dfs_required > 0 && cfg80211_chandef_dfs_available(wiphy, chandef)) { /* We can skip IEEE80211_CHAN_NO_IR if chandef dfs available */ - prohibited_flags = IEEE80211_CHAN_DISABLED; + prohibited_flags &= ~IEEE80211_CHAN_NO_IR; + check_radar = false; } - res = _cfg80211_chandef_usable(wiphy, chandef, prohibited_flags, 0); + if (check_radar && + !_cfg80211_chandef_usable(wiphy, chandef, + IEEE80211_CHAN_RADAR, 0)) + return false; + + res = _cfg80211_chandef_usable(wiphy, chandef, + prohibited_flags, + permitting_flags); trace_cfg80211_return_bool(res); return res; @@ -1555,6 +1565,7 @@ bool cfg80211_reg_check_beaconing(struct wiphy *wiphy, struct cfg80211_beaconing_check_config *cfg) { struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy); + u32 permitting_flags = 0; bool check_no_ir = true; /* @@ -1569,8 +1580,12 @@ bool cfg80211_reg_check_beaconing(struct wiphy *wiphy, chandef->chan); } + if (cfg->reg_power == IEEE80211_REG_VLP_AP) + permitting_flags |= IEEE80211_CHAN_ALLOW_6GHZ_VLP_AP; + return _cfg80211_reg_can_beacon(wiphy, chandef, cfg->iftype, - check_no_ir); + check_no_ir ? IEEE80211_CHAN_NO_IR : 0, + permitting_flags); } EXPORT_SYMBOL(cfg80211_reg_check_beaconing); diff --git a/net/wireless/nl80211.c b/net/wireless/nl80211.c index 00f7d36c66a5..7207e2bfb04d 100644 --- a/net/wireless/nl80211.c +++ b/net/wireless/nl80211.c @@ -1207,6 +1207,9 @@ static int nl80211_msg_put_channel(struct sk_buff *msg, struct wiphy *wiphy, if ((chan->flags & IEEE80211_CHAN_CAN_MONITOR) && nla_put_flag(msg, NL80211_FREQUENCY_ATTR_CAN_MONITOR)) goto nla_put_failure; + if ((chan->flags & IEEE80211_CHAN_ALLOW_6GHZ_VLP_AP) && + nla_put_flag(msg, NL80211_FREQUENCY_ATTR_ALLOW_6GHZ_VLP_AP)) + goto nla_put_failure; } if (nla_put_u32(msg, NL80211_FREQUENCY_ATTR_MAX_TX_POWER, @@ -5954,6 +5957,7 @@ static int nl80211_validate_ap_phy_operation(struct cfg80211_ap_settings *params static int nl80211_start_ap(struct sk_buff *skb, struct genl_info *info) { struct cfg80211_registered_device *rdev = info->user_ptr[0]; + struct cfg80211_beaconing_check_config beacon_check = {}; unsigned int link_id = nl80211_link_id(info->attrs); struct net_device *dev = info->user_ptr[1]; struct wireless_dev *wdev = dev->ieee80211_ptr; @@ -6103,8 +6107,13 @@ static int nl80211_start_ap(struct sk_buff *skb, struct genl_info *info) goto out; } - if (!cfg80211_reg_can_beacon_relax(&rdev->wiphy, ¶ms->chandef, - wdev->iftype)) { + beacon_check.iftype = wdev->iftype; + beacon_check.relax = true; + beacon_check.reg_power = + cfg80211_get_6ghz_power_type(params->beacon.tail, + params->beacon.tail_len); + if (!cfg80211_reg_check_beaconing(&rdev->wiphy, ¶ms->chandef, + &beacon_check)) { err = -EINVAL; goto out; } @@ -6261,6 +6270,7 @@ static int nl80211_start_ap(struct sk_buff *skb, struct genl_info *info) static int nl80211_set_beacon(struct sk_buff *skb, struct genl_info *info) { struct cfg80211_registered_device *rdev = info->user_ptr[0]; + struct cfg80211_beaconing_check_config beacon_check = {}; unsigned int link_id = nl80211_link_id(info->attrs); struct net_device *dev = info->user_ptr[1]; struct wireless_dev *wdev = dev->ieee80211_ptr; @@ -6287,6 +6297,19 @@ static int nl80211_set_beacon(struct sk_buff *skb, struct genl_info *info) if (err) goto out; + /* recheck beaconing is permitted with possibly changed power type */ + beacon_check.iftype = wdev->iftype; + beacon_check.relax = true; + beacon_check.reg_power = + cfg80211_get_6ghz_power_type(params->beacon.tail, + params->beacon.tail_len); + if (!cfg80211_reg_check_beaconing(&rdev->wiphy, + &wdev->links[link_id].ap.chandef, + &beacon_check)) { + err = -EINVAL; + goto out; + } + attr = info->attrs[NL80211_ATTR_FILS_DISCOVERY]; if (attr) { err = nl80211_parse_fils_discovery(rdev, attr, diff --git a/net/wireless/reg.c b/net/wireless/reg.c index 3cef0021a3db..4a27f3823e25 100644 --- a/net/wireless/reg.c +++ b/net/wireless/reg.c @@ -1600,6 +1600,8 @@ static u32 map_regdom_flags(u32 rd_flags) channel_flags |= IEEE80211_CHAN_NO_6GHZ_AFC_CLIENT; if (rd_flags & NL80211_RRF_PSD) channel_flags |= IEEE80211_CHAN_PSD; + if (rd_flags & NL80211_RRF_ALLOW_6GHZ_VLP_AP) + channel_flags |= IEEE80211_CHAN_ALLOW_6GHZ_VLP_AP; return channel_flags; } diff --git a/net/wireless/trace.h b/net/wireless/trace.h index 14cfa0aba93a..33c3c4c1b158 100644 --- a/net/wireless/trace.h +++ b/net/wireless/trace.h @@ -3389,23 +3389,26 @@ TRACE_EVENT(cfg80211_cqm_rssi_notify, TRACE_EVENT(cfg80211_reg_can_beacon, TP_PROTO(struct wiphy *wiphy, struct cfg80211_chan_def *chandef, - enum nl80211_iftype iftype, bool check_no_ir), - TP_ARGS(wiphy, chandef, iftype, check_no_ir), + enum nl80211_iftype iftype, u32 prohibited_flags, + u32 permitting_flags), + TP_ARGS(wiphy, chandef, iftype, prohibited_flags, permitting_flags), TP_STRUCT__entry( WIPHY_ENTRY CHAN_DEF_ENTRY __field(enum nl80211_iftype, iftype) - __field(bool, check_no_ir) + __field(u32, prohibited_flags) + __field(u32, permitting_flags) ), TP_fast_assign( WIPHY_ASSIGN; CHAN_DEF_ASSIGN(chandef); __entry->iftype = iftype; - __entry->check_no_ir = check_no_ir; + __entry->prohibited_flags = prohibited_flags; + __entry->permitting_flags = permitting_flags; ), - TP_printk(WIPHY_PR_FMT ", " CHAN_DEF_PR_FMT ", iftype=%d check_no_ir=%s", + TP_printk(WIPHY_PR_FMT ", " CHAN_DEF_PR_FMT ", iftype=%d prohibited_flags=0x%x permitting_flags=0x%x", WIPHY_PR_ARG, CHAN_DEF_PR_ARG, __entry->iftype, - BOOL_TO_STR(__entry->check_no_ir)) + __entry->prohibited_flags, __entry->permitting_flags) ); TRACE_EVENT(cfg80211_chandef_dfs_required,