Add the option to hint the wireless core that it is operating in an indoor
environment.
Change-Id: Ie082a09b41292c6e12d4b2ffb01117c14b6a94f6
Signed-off-by: Ilan Peer <ilan.peer@xxxxxxxxx>
---
include/net/cfg80211.h | 5 ++++
include/uapi/linux/nl80211.h | 3 ++
net/wireless/nl80211.c | 18 +++++-------
net/wireless/reg.c | 64 +++++++++++++++++++++++++++++++++++++++++-
net/wireless/reg.h | 1 +
5 files changed, 79 insertions(+), 12 deletions(-)
diff --git a/include/net/cfg80211.h b/include/net/cfg80211.h
index e872c9c..5c6053c 100644
--- a/include/net/cfg80211.h
+++ b/include/net/cfg80211.h
@@ -3626,6 +3626,11 @@ const struct ieee80211_reg_rule *freq_reg_info(struct wiphy *wiphy,
*/
const char *reg_initiator_name(enum nl80211_reg_initiator initiator);
+/**
+ * regulatory_indoor_allowed - is indoor operation allowed
+ */
+bool regulatory_indoor_allowed(void);
+
/*
* 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 061f8d4..42710e5 100644
--- a/include/uapi/linux/nl80211.h
+++ b/include/uapi/linux/nl80211.h
@@ -2583,10 +2583,13 @@ 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 2270d9b..50826a9 100644
--- a/net/wireless/nl80211.c
+++ b/net/wireless/nl80211.c
@@ -4659,7 +4659,6 @@ 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;
@@ -4672,11 +4671,6 @@ 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]);
@@ -4686,14 +4680,16 @@ 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;
}
static int nl80211_get_mesh_config(struct sk_buff *skb,
diff --git a/net/wireless/reg.c b/net/wireless/reg.c
index 8f5b460..50e41a5 100644
--- a/net/wireless/reg.c
+++ b/net/wireless/reg.c
@@ -65,11 +65,26 @@
#define REG_DBG_PRINT(args...)
#endif
+/**
+ * enum reg_request_treatment - regulatory request treatment
+ *
+ * @REG_REQ_OK: continue processing the regulatory request
+ * @REG_REQ_IGNORE: ignore the regulatory request
+ * @REG_REQ_INTERSECT: the regulatory domain resulting from this request should
+ * be intersected with the current one.
+ * @REG_REQ_ALREADY_SET: the regulatory request will not change the current
+ * regulatory settings, and no further processing is required.
+ * @REG_REQ_USER_HINT_HANDLED: a non alpha2 user hint was handled and no
+ * further processing is required, i.e., not need to update last_request
+ * etc. This should be used for user hints that do not provide an alpha2
+ * but some other type of regulatory hint, i.e., indoor operation.
+ */
enum reg_request_treatment {
REG_REQ_OK,
REG_REQ_IGNORE,
REG_REQ_INTERSECT,
REG_REQ_ALREADY_SET,
+ REG_REQ_USER_HINT_HANDLED,
};
static struct regulatory_request core_request_world = {
@@ -110,6 +125,14 @@ 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);
@@ -1104,6 +1127,13 @@ 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());
@@ -1546,6 +1576,11 @@ __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_USER_HINT_HANDLED;
+ }
+
if (reg_request_cell_base(user_request))
return reg_ignore_cell_hint(user_request);
@@ -1593,7 +1628,8 @@ reg_process_hint_user(struct regulatory_request *user_request)
treatment = __reg_process_hint_user(user_request);
if (treatment == REG_REQ_IGNORE ||
- treatment == REG_REQ_ALREADY_SET) {
+ treatment == REG_REQ_ALREADY_SET ||
+ treatment == REG_REQ_USER_HINT_HANDLED) {
kfree(user_request);
return treatment;
}
@@ -1654,6 +1690,7 @@ reg_process_hint_driver(struct wiphy *wiphy,
case REG_REQ_OK:
break;
case REG_REQ_IGNORE:
+ case REG_REQ_USER_HINT_HANDLED:
kfree(driver_request);
return treatment;
case REG_REQ_INTERSECT:
@@ -1753,6 +1790,7 @@ reg_process_hint_country_ie(struct wiphy *wiphy,
case REG_REQ_OK:
break;
case REG_REQ_IGNORE:
+ case REG_REQ_USER_HINT_HANDLED:
/* fall through */
case REG_REQ_ALREADY_SET:
kfree(country_ie_request);
@@ -1945,6 +1983,22 @@ 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)
{
@@ -2112,6 +2166,8 @@ static void restore_regulatory_settings(bool reset_user)
ASSERT_RTNL();
+ reg_is_indoor = false;
+
reset_regdomains(true, &world_regdom);
restore_alpha2(alpha2, reset_user);
@@ -2626,6 +2682,12 @@ int cfg80211_get_unii(int freq)
return -EINVAL;
}
+bool regulatory_indoor_allowed(void)
+{
+ return reg_is_indoor;
+}
+EXPORT_SYMBOL_GPL(regulatory_indoor_allowed);
+
int __init regulatory_init(void)
{
int err = 0;
diff --git a/net/wireless/reg.h b/net/wireless/reg.h
index 9c11e72..b350a30 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
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