---

yaml
---
r: 315583
b: refs/heads/master
c: 57b5ce0
h: refs/heads/master
i:
  315581: 4766862
  315579: 00310c9
  315575: 9f0163a
  315567: b0c635a
  315551: 19a28c4
  315519: c63b886
v: v3

[refs]

@@ -1,2 +1,2 @@
 ---
-refs/heads/master: b594bab9021f5225a24bcb69d7f7b7272419adb2
+refs/heads/master: 57b5ce072e7361218a8e2ea1d62960cbb71d9cff

trunk/include/linux/nl80211.h

@@ -1245,6 +1245,12 @@ enum nl80211_commands {
  * @NL80211_ATTR_BG_SCAN_PERIOD: Background scan period in seconds
  *      or 0 to disable background scan.
  *
+ * @NL80211_ATTR_USER_REG_HINT_TYPE: type of regulatory hint passed from
+ *	userspace. If unset it is assumed the hint comes directly from
+ *	a user. If set code could specify exactly what type of source
+ *	was used to provide the hint. For the different types of
+ *	allowed user regulatory hints see nl80211_user_reg_hint_type.
+ *
  * @NL80211_ATTR_MAX: highest attribute number currently defined
  * @__NL80211_ATTR_AFTER_LAST: internal use
  */
@@ -1498,6 +1504,8 @@ enum nl80211_attrs {
 
 	NL80211_ATTR_WDEV,
 
+	NL80211_ATTR_USER_REG_HINT_TYPE,
+
 	/* add attributes here, update the policy in nl80211.c */
 
 	__NL80211_ATTR_AFTER_LAST,
@@ -2060,6 +2068,26 @@ enum nl80211_dfs_regions {
 	NL80211_DFS_JP		= 3,
 };
 
+/**
+ * enum nl80211_user_reg_hint_type - type of user regulatory hint
+ *
+ * @NL80211_USER_REG_HINT_USER: a user sent the hint. This is always
+ *	assumed if the attribute is not set.
+ * @NL80211_USER_REG_HINT_CELL_BASE: the hint comes from a cellular
+ *	base station. Device drivers that have been tested to work
+ *	properly to support this type of hint can enable these hints
+ *	by setting the NL80211_FEATURE_CELL_BASE_REG_HINTS feature
+ *	capability on the struct wiphy. The wireless core will
+ *	ignore all cell base station hints until at least one device
+ *	present has been registered with the wireless core that
+ *	has listed NL80211_FEATURE_CELL_BASE_REG_HINTS as a
+ *	supported feature.
+ */
+enum nl80211_user_reg_hint_type {
+	NL80211_USER_REG_HINT_USER	= 0,
+	NL80211_USER_REG_HINT_CELL_BASE = 1,
+};
+
 /**
  * enum nl80211_survey_info - survey information
  *
@@ -2963,11 +2991,15 @@ enum nl80211_ap_sme_features {
  * @NL80211_FEATURE_HT_IBSS: This driver supports IBSS with HT datarates.
  * @NL80211_FEATURE_INACTIVITY_TIMER: This driver takes care of freeing up
  *	the connected inactive stations in AP mode.
+ * @NL80211_FEATURE_CELL_BASE_REG_HINTS: This driver has been tested
+ *	to work properly to suppport receiving regulatory hints from
+ *	cellular base stations.
  */
 enum nl80211_feature_flags {
 	NL80211_FEATURE_SK_TX_STATUS	= 1 << 0,
 	NL80211_FEATURE_HT_IBSS		= 1 << 1,
 	NL80211_FEATURE_INACTIVITY_TIMER = 1 << 2,
+	NL80211_FEATURE_CELL_BASE_REG_HINTS = 1 << 3,
 };
 
 /**

trunk/include/net/regulatory.h

@@ -52,6 +52,10 @@ enum environment_cap {
  *	DFS master operation on a known DFS region (NL80211_DFS_*),
  *	dfs_region represents that region. Drivers can use this and the
  *	@alpha2 to adjust their device's DFS parameters as required.
+ * @user_reg_hint_type: if the @initiator was of type
+ *	%NL80211_REGDOM_SET_BY_USER, this classifies the type
+ *	of hint passed. This could be any of the %NL80211_USER_REG_HINT_*
+ *	types.
  * @intersect: indicates whether the wireless core should intersect
  * 	the requested regulatory domain with the presently set regulatory
  * 	domain.
@@ -70,6 +74,7 @@ enum environment_cap {
 struct regulatory_request {
 	int wiphy_idx;
 	enum nl80211_reg_initiator initiator;
+	enum nl80211_user_reg_hint_type user_reg_hint_type;
 	char alpha2[2];
 	u8 dfs_region;
 	bool intersect;

trunk/net/wireless/core.c

@@ -542,6 +542,7 @@ int wiphy_register(struct wiphy *wiphy)
 	}
 
 	/* set up regulatory info */
+	wiphy_regulatory_register(wiphy);
 	regulatory_update(wiphy, NL80211_REGDOM_SET_BY_CORE);
 
 	list_add_rcu(&rdev->list, &cfg80211_rdev_list);

trunk/net/wireless/nl80211.c

@@ -354,6 +354,7 @@ static const struct nla_policy nl80211_policy[NL80211_ATTR_MAX+1] = {
 	[NL80211_ATTR_INACTIVITY_TIMEOUT] = { .type = NLA_U16 },
 	[NL80211_ATTR_BG_SCAN_PERIOD] = { .type = NLA_U16 },
 	[NL80211_ATTR_WDEV] = { .type = NLA_U64 },
+	[NL80211_ATTR_USER_REG_HINT_TYPE] = { .type = NLA_U32 },
 };
 
 /* policy for the key attributes */
@@ -3582,6 +3583,7 @@ 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;
 
 	/*
 	 * You should only get this when cfg80211 hasn't yet initialized
@@ -3601,7 +3603,21 @@ static int nl80211_req_set_reg(struct sk_buff *skb, struct genl_info *info)
 
 	data = nla_data(info->attrs[NL80211_ATTR_REG_ALPHA2]);
 
-	r = regulatory_hint_user(data);
+	if (info->attrs[NL80211_ATTR_USER_REG_HINT_TYPE])
+		user_reg_hint_type =
+		  nla_get_u32(info->attrs[NL80211_ATTR_USER_REG_HINT_TYPE]);
+	else
+		user_reg_hint_type = NL80211_USER_REG_HINT_USER;
+
+	switch (user_reg_hint_type) {
+	case NL80211_USER_REG_HINT_USER:
+	case NL80211_USER_REG_HINT_CELL_BASE:
+		break;
+	default:
+		return -EINVAL;
+	}
+
+	r = regulatory_hint_user(data, user_reg_hint_type);
 
 	return r;
 }
@@ -3971,6 +3987,11 @@ static int nl80211_get_reg(struct sk_buff *skb, struct genl_info *info)
 			cfg80211_regdomain->dfs_region)))
 		goto nla_put_failure;
 
+	if (reg_last_request_cell_base() &&
+	    nla_put_u32(msg, NL80211_ATTR_USER_REG_HINT_TYPE,
+			NL80211_USER_REG_HINT_CELL_BASE))
+		goto nla_put_failure;
+
 	nl_reg_rules = nla_nest_start(msg, NL80211_ATTR_REG_RULES);
 	if (!nl_reg_rules)
 		goto nla_put_failure;

trunk/net/wireless/reg.c

@@ -97,9 +97,16 @@ const struct ieee80211_regdomain *cfg80211_regdomain;
  *     - cfg80211_world_regdom
  *     - cfg80211_regdom
  *     - last_request
+ *     - reg_num_devs_support_basehint
  */
 static DEFINE_MUTEX(reg_mutex);
 
+/*
+ * Number of devices that registered to the core
+ * that support cellular base station regulatory hints
+ */
+static int reg_num_devs_support_basehint;
+
 static inline void assert_reg_lock(void)
 {
 	lockdep_assert_held(&reg_mutex);
@@ -911,6 +918,59 @@ static void handle_band(struct wiphy *wiphy,
 		handle_channel(wiphy, initiator, band, i);
 }
 
+static bool reg_request_cell_base(struct regulatory_request *request)
+{
+	if (request->initiator != NL80211_REGDOM_SET_BY_USER)
+		return false;
+	if (request->user_reg_hint_type != NL80211_USER_REG_HINT_CELL_BASE)
+		return false;
+	return true;
+}
+
+bool reg_last_request_cell_base(void)
+{
+	assert_cfg80211_lock();
+
+	mutex_lock(&reg_mutex);
+	return reg_request_cell_base(last_request);
+	mutex_unlock(&reg_mutex);
+}
+
+#ifdef CONFIG_CFG80211_CERTIFICATION_ONUS
+
+/* Core specific check */
+static int reg_ignore_cell_hint(struct regulatory_request *pending_request)
+{
+	if (!reg_num_devs_support_basehint)
+		return -EOPNOTSUPP;
+
+	if (reg_request_cell_base(last_request)) {
+		if (!regdom_changes(pending_request->alpha2))
+			return -EALREADY;
+		return 0;
+	}
+	return 0;
+}
+
+/* Device specific check */
+static bool reg_dev_ignore_cell_hint(struct wiphy *wiphy)
+{
+	if (!(wiphy->features & NL80211_FEATURE_CELL_BASE_REG_HINTS))
+		return true;
+	return false;
+}
+#else
+static int reg_ignore_cell_hint(struct regulatory_request *pending_request)
+{
+	return -EOPNOTSUPP;
+}
+static int reg_dev_ignore_cell_hint(struct wiphy *wiphy)
+{
+	return true;
+}
+#endif
+
+
 static bool ignore_reg_update(struct wiphy *wiphy,
 			      enum nl80211_reg_initiator initiator)
 {
@@ -944,6 +1004,9 @@ static bool ignore_reg_update(struct wiphy *wiphy,
 		return true;
 	}
 
+	if (reg_request_cell_base(last_request))
+		return reg_dev_ignore_cell_hint(wiphy);
+
 	return false;
 }
 
@@ -1307,6 +1370,13 @@ static int ignore_request(struct wiphy *wiphy,
 		return 0;
 	case NL80211_REGDOM_SET_BY_COUNTRY_IE:
 
+		if (reg_request_cell_base(last_request)) {
+			/* Trust a Cell base station over the AP's country IE */
+			if (regdom_changes(pending_request->alpha2))
+				return -EOPNOTSUPP;
+			return -EALREADY;
+		}
+
 		last_wiphy = wiphy_idx_to_wiphy(last_request->wiphy_idx);
 
 		if (unlikely(!is_an_alpha2(pending_request->alpha2)))
@@ -1351,6 +1421,12 @@ static int ignore_request(struct wiphy *wiphy,
 
 		return REG_INTERSECT;
 	case NL80211_REGDOM_SET_BY_USER:
+		if (reg_request_cell_base(pending_request))
+			return reg_ignore_cell_hint(pending_request);
+
+		if (reg_request_cell_base(last_request))
+			return -EOPNOTSUPP;
+
 		if (last_request->initiator == NL80211_REGDOM_SET_BY_COUNTRY_IE)
 			return REG_INTERSECT;
 		/*
@@ -1640,7 +1716,8 @@ static int regulatory_hint_core(const char *alpha2)
 }
 
 /* User hints */
-int regulatory_hint_user(const char *alpha2)
+int regulatory_hint_user(const char *alpha2,
+			 enum nl80211_user_reg_hint_type user_reg_hint_type)
 {
 	struct regulatory_request *request;
 
@@ -1654,6 +1731,7 @@ int regulatory_hint_user(const char *alpha2)
 	request->alpha2[0] = alpha2[0];
 	request->alpha2[1] = alpha2[1];
 	request->initiator = NL80211_REGDOM_SET_BY_USER;
+	request->user_reg_hint_type = user_reg_hint_type;
 
 	queue_regulatory_request(request);
 
@@ -1906,7 +1984,7 @@ static void restore_regulatory_settings(bool reset_user)
 	 * settings, user regulatory settings takes precedence.
 	 */
 	if (is_an_alpha2(alpha2))
-		regulatory_hint_user(user_alpha2);
+		regulatory_hint_user(user_alpha2, NL80211_USER_REG_HINT_USER);
 
 	if (list_empty(&tmp_reg_req_list))
 		return;
@@ -2081,9 +2159,16 @@ static void print_regdomain(const struct ieee80211_regdomain *rd)
 	else {
 		if (is_unknown_alpha2(rd->alpha2))
 			pr_info("Regulatory domain changed to driver built-in settings (unknown country)\n");
-		else
-			pr_info("Regulatory domain changed to country: %c%c\n",
-				rd->alpha2[0], rd->alpha2[1]);
+		else {
+			if (reg_request_cell_base(last_request))
+				pr_info("Regulatory domain changed "
+					"to country: %c%c by Cell Station\n",
+					rd->alpha2[0], rd->alpha2[1]);
+			else
+				pr_info("Regulatory domain changed "
+					"to country: %c%c\n",
+					rd->alpha2[0], rd->alpha2[1]);
+		}
 	}
 	print_dfs_region(rd->dfs_region);
 	print_rd_rules(rd);
@@ -2293,6 +2378,18 @@ int reg_device_uevent(struct device *dev, struct kobj_uevent_env *env)
 }
 #endif /* CONFIG_HOTPLUG */
 
+void wiphy_regulatory_register(struct wiphy *wiphy)
+{
+	assert_cfg80211_lock();
+
+	mutex_lock(&reg_mutex);
+
+	if (!reg_dev_ignore_cell_hint(wiphy))
+		reg_num_devs_support_basehint++;
+
+	mutex_unlock(&reg_mutex);
+}
+
 /* Caller must hold cfg80211_mutex */
 void reg_device_remove(struct wiphy *wiphy)
 {
@@ -2302,6 +2399,9 @@ void reg_device_remove(struct wiphy *wiphy)
 
 	mutex_lock(&reg_mutex);
 
+	if (!reg_dev_ignore_cell_hint(wiphy))
+		reg_num_devs_support_basehint--;
+
 	kfree(wiphy->regd);
 
 	if (last_request)
@@ -2367,7 +2467,8 @@ int __init regulatory_init(void)
 	 * as a user hint.
 	 */
 	if (!is_world_regdom(ieee80211_regdom))
-		regulatory_hint_user(ieee80211_regdom);
+		regulatory_hint_user(ieee80211_regdom,
+				     NL80211_USER_REG_HINT_USER);
 
 	return 0;
 }

trunk/net/wireless/reg.h

@@ -22,9 +22,11 @@ bool is_world_regdom(const char *alpha2);
 bool reg_is_valid_request(const char *alpha2);
 bool reg_supported_dfs_region(u8 dfs_region);
 
-int regulatory_hint_user(const char *alpha2);
+int regulatory_hint_user(const char *alpha2,
+			 enum nl80211_user_reg_hint_type user_reg_hint_type);
 
 int reg_device_uevent(struct device *dev, struct kobj_uevent_env *env);
+void wiphy_regulatory_register(struct wiphy *wiphy);
 void reg_device_remove(struct wiphy *wiphy);
 
 int __init regulatory_init(void);
@@ -33,6 +35,7 @@ void regulatory_exit(void);
 int set_regdom(const struct ieee80211_regdomain *rd);
 
 void regulatory_update(struct wiphy *wiphy, enum nl80211_reg_initiator setby);
+bool reg_last_request_cell_base(void);
 
 /**
  * regulatory_hint_found_beacon - hints a beacon was found on a channel