Return-path: Received: from mga11.intel.com ([192.55.52.93]:46421 "EHLO mga11.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753170AbaA0KU1 (ORCPT ); Mon, 27 Jan 2014 05:20:27 -0500 From: Ilan Peer To: linux-wireless@vger.kernel.org Cc: wireless-regdb@lists.infradead.org, Ilan Peer Subject: [PATCH v3 4/6] cfg80211: Add an option to hint indoor operation Date: Mon, 27 Jan 2014 12:21:56 +0200 Message-Id: <1390818118-27261-5-git-send-email-ilan.peer@intel.com> (sfid-20140127_112047_079973_9230A036) In-Reply-To: <1390818118-27261-1-git-send-email-ilan.peer@intel.com> References: <1390818118-27261-1-git-send-email-ilan.peer@intel.com> Sender: linux-wireless-owner@vger.kernel.org List-ID: Add the option to hint the wireless core that it is operating in an indoor environment. In addition add regulatory_ir_allowed(), that can be used to test if initiation radiation is allowed based on the channel flags and the wireless core indoor hint. Signed-off-by: Ilan Peer --- include/net/cfg80211.h | 14 +++++++++++ include/uapi/linux/nl80211.h | 3 +++ net/wireless/nl80211.c | 18 +++++++------- net/wireless/reg.c | 54 +++++++++++++++++++++++++++++++++++++++--- net/wireless/reg.h | 1 + 5 files changed, 77 insertions(+), 13 deletions(-) diff --git a/include/net/cfg80211.h b/include/net/cfg80211.h index 317bd06..6e6c42c 100644 --- a/include/net/cfg80211.h +++ b/include/net/cfg80211.h @@ -3627,6 +3627,20 @@ const struct ieee80211_reg_rule *freq_reg_info(struct wiphy *wiphy, */ const char *reg_initiator_name(enum nl80211_reg_initiator initiator); +/** + * regulatory_ir_allowed - is it allowed to initiate radiation on the channel. + * @wiphy: the wiphy for which we want to test channel. + * @chan: the channel + * + * Generally, it is not allowed to initiate radiation on a channel marked with + * IEEE80211_CHAN_NO_IR. The exception is operation on channels marked with + * IEEE80211_CHAN_INDOOR_ONLY. For such channels, initiating radiation is + * allowed iff the wireless core was notified that it operates in an indoor + * environment. + */ +bool regulatory_ir_allowed(struct wiphy *wiphy, + struct ieee80211_channel *chan); + /* * callbacks for asynchronous cfg80211 methods, notification * functions and BSS handling helpers diff --git a/include/uapi/linux/nl80211.h b/include/uapi/linux/nl80211.h index 06440ac..1dbf6d3 100644 --- a/include/uapi/linux/nl80211.h +++ b/include/uapi/linux/nl80211.h @@ -2533,10 +2533,13 @@ enum nl80211_dfs_regions { * present has been registered with the wireless core that * has listed NL80211_FEATURE_CELL_BASE_REG_HINTS as a * supported feature. + * @NL80211_USER_REG_HINT_INDOOR: a user sent an hint indicating that the + * platform is operating in an indoor environment. */ enum nl80211_user_reg_hint_type { NL80211_USER_REG_HINT_USER = 0, NL80211_USER_REG_HINT_CELL_BASE = 1, + NL80211_USER_REG_HINT_INDOOR = 2, }; /** diff --git a/net/wireless/nl80211.c b/net/wireless/nl80211.c index b37b36e..b33f346 100644 --- a/net/wireless/nl80211.c +++ b/net/wireless/nl80211.c @@ -4664,7 +4664,6 @@ static int parse_reg_rule(struct nlattr *tb[], static int nl80211_req_set_reg(struct sk_buff *skb, struct genl_info *info) { - int r; char *data = NULL; enum nl80211_user_reg_hint_type user_reg_hint_type; @@ -4677,11 +4676,6 @@ static int nl80211_req_set_reg(struct sk_buff *skb, struct genl_info *info) if (unlikely(!rcu_access_pointer(cfg80211_regdomain))) return -EINPROGRESS; - if (!info->attrs[NL80211_ATTR_REG_ALPHA2]) - return -EINVAL; - - data = nla_data(info->attrs[NL80211_ATTR_REG_ALPHA2]); - if (info->attrs[NL80211_ATTR_USER_REG_HINT_TYPE]) user_reg_hint_type = nla_get_u32(info->attrs[NL80211_ATTR_USER_REG_HINT_TYPE]); @@ -4691,14 +4685,18 @@ static int nl80211_req_set_reg(struct sk_buff *skb, struct genl_info *info) switch (user_reg_hint_type) { case NL80211_USER_REG_HINT_USER: case NL80211_USER_REG_HINT_CELL_BASE: - break; + if (!info->attrs[NL80211_ATTR_REG_ALPHA2]) + return -EINVAL; + + data = nla_data(info->attrs[NL80211_ATTR_REG_ALPHA2]); + return regulatory_hint_user(data, user_reg_hint_type); + case NL80211_USER_REG_HINT_INDOOR: + return regulatory_hint_indoor_user(); default: return -EINVAL; } - r = regulatory_hint_user(data, user_reg_hint_type); - - return r; + return 0; } static int nl80211_get_mesh_config(struct sk_buff *skb, diff --git a/net/wireless/reg.c b/net/wireless/reg.c index ec38f5d..2f2d5db 100644 --- a/net/wireless/reg.c +++ b/net/wireless/reg.c @@ -110,6 +110,14 @@ const struct ieee80211_regdomain __rcu *cfg80211_regdomain; */ static int reg_num_devs_support_basehint; +/* + * State variable indicating if the platform on which the devices + * are attached is operating in an indoor environment. The state variable + * is relevant for all registered devices. + * Note: currently not protected by any synchronization primitive. + */ +static bool reg_is_indoor; + static const struct ieee80211_regdomain *get_cfg80211_regdom(void) { return rtnl_dereference(cfg80211_regdomain); @@ -1014,6 +1022,13 @@ static bool reg_request_cell_base(struct regulatory_request *request) return request->user_reg_hint_type == NL80211_USER_REG_HINT_CELL_BASE; } +static bool reg_request_indoor(struct regulatory_request *request) +{ + if (request->initiator != NL80211_REGDOM_SET_BY_USER) + return false; + return request->user_reg_hint_type == NL80211_USER_REG_HINT_INDOOR; +} + bool reg_last_request_cell_base(void) { return reg_request_cell_base(get_last_request()); @@ -1450,6 +1465,11 @@ __reg_process_hint_user(struct regulatory_request *user_request) { struct regulatory_request *lr = get_last_request(); + if (reg_request_indoor(user_request)) { + reg_is_indoor = true; + return REG_REQ_ALREADY_SET; + } + if (reg_request_cell_base(user_request)) return reg_ignore_cell_hint(user_request); @@ -1685,9 +1705,6 @@ static void reg_process_hint(struct regulatory_request *reg_request) struct wiphy *wiphy = NULL; enum reg_request_treatment treatment; - if (WARN_ON(!reg_request->alpha2)) - return; - if (reg_request->wiphy_idx != WIPHY_IDX_INVALID) wiphy = wiphy_idx_to_wiphy(reg_request->wiphy_idx); @@ -1847,6 +1864,22 @@ int regulatory_hint_user(const char *alpha2, return 0; } +int regulatory_hint_indoor_user(void) +{ + struct regulatory_request *request; + + request = kzalloc(sizeof(struct regulatory_request), GFP_KERNEL); + if (!request) + return -ENOMEM; + + request->wiphy_idx = WIPHY_IDX_INVALID; + request->initiator = NL80211_REGDOM_SET_BY_USER; + request->user_reg_hint_type = NL80211_USER_REG_HINT_INDOOR; + queue_regulatory_request(request); + + return 0; +} + /* Driver hints */ int regulatory_hint(struct wiphy *wiphy, const char *alpha2) { @@ -2014,6 +2047,8 @@ static void restore_regulatory_settings(bool reset_user) ASSERT_RTNL(); + reg_is_indoor = false; + reset_regdomains(true, &world_regdom); restore_alpha2(alpha2, reset_user); @@ -2515,6 +2550,19 @@ int cfg80211_get_unii(int freq) return -EINVAL; } +bool regulatory_ir_allowed(struct wiphy *wiphy, struct ieee80211_channel *chan) +{ + if (config_enabled(CONFIG_CFG80211_REG_RELAX_NO_IR) && + !(wiphy->regulatory_flags & REGULATORY_DISABLE_RELAX_NO_IR) && + reg_is_indoor && (chan->flags & IEEE80211_CHAN_INDOOR_ONLY)) + return true; + + if (chan->flags & IEEE80211_CHAN_NO_IR) + return false; + return true; +} +EXPORT_SYMBOL(regulatory_ir_allowed); + int __init regulatory_init(void) { int err = 0; diff --git a/net/wireless/reg.h b/net/wireless/reg.h index 4d44cd4..2960024 100644 --- a/net/wireless/reg.h +++ b/net/wireless/reg.h @@ -25,6 +25,7 @@ enum nl80211_dfs_regions reg_get_dfs_region(struct wiphy *wiphy); int regulatory_hint_user(const char *alpha2, enum nl80211_user_reg_hint_type user_reg_hint_type); +int regulatory_hint_indoor_user(void); int reg_device_uevent(struct device *dev, struct kobj_uevent_env *env); void wiphy_regulatory_register(struct wiphy *wiphy); -- 1.7.10.4