/* Used to track the userspace process controlling the indoor setting */
static u32 reg_is_indoor_portid;
-/* Max number of consecutive attempts to communicate with CRDA */
-#define REG_MAX_CRDA_TIMEOUTS 10
-
-static u32 reg_crda_timeouts;
+static void restore_regulatory_settings(bool reset_user);
static const struct ieee80211_regdomain *get_cfg80211_regdom(void)
{
static void reg_todo(struct work_struct *work);
static DECLARE_WORK(reg_work, reg_todo);
-static void reg_timeout_work(struct work_struct *work);
-static DECLARE_DELAYED_WORK(reg_timeout, reg_timeout_work);
-
/* We keep a static world regulatory domain in case of the absence of CRDA */
static const struct ieee80211_regdomain world_regdom = {
.n_reg_rules = 8,
static void reg_free_request(struct regulatory_request *request)
{
+ if (request == &core_request_world)
+ return;
+
if (request != get_last_request())
kfree(request);
}
}
#ifdef CONFIG_CFG80211_INTERNAL_REGDB
-struct reg_regdb_search_request {
- char alpha2[2];
+struct reg_regdb_apply_request {
struct list_head list;
+ const struct ieee80211_regdomain *regdom;
};
-static LIST_HEAD(reg_regdb_search_list);
-static DEFINE_MUTEX(reg_regdb_search_mutex);
+static LIST_HEAD(reg_regdb_apply_list);
+static DEFINE_MUTEX(reg_regdb_apply_mutex);
-static void reg_regdb_search(struct work_struct *work)
+static void reg_regdb_apply(struct work_struct *work)
{
- struct reg_regdb_search_request *request;
- const struct ieee80211_regdomain *curdom, *regdom = NULL;
- int i;
+ struct reg_regdb_apply_request *request;
rtnl_lock();
- mutex_lock(®_regdb_search_mutex);
- while (!list_empty(®_regdb_search_list)) {
- request = list_first_entry(®_regdb_search_list,
- struct reg_regdb_search_request,
+ mutex_lock(®_regdb_apply_mutex);
+ while (!list_empty(®_regdb_apply_list)) {
+ request = list_first_entry(®_regdb_apply_list,
+ struct reg_regdb_apply_request,
list);
list_del(&request->list);
- for (i = 0; i < reg_regdb_size; i++) {
- curdom = reg_regdb[i];
-
- if (alpha2_equal(request->alpha2, curdom->alpha2)) {
- regdom = reg_copy_regd(curdom);
- break;
- }
- }
-
+ set_regdom(request->regdom, REGD_SOURCE_INTERNAL_DB);
kfree(request);
}
- mutex_unlock(®_regdb_search_mutex);
-
- if (!IS_ERR_OR_NULL(regdom))
- set_regdom(regdom, REGD_SOURCE_INTERNAL_DB);
+ mutex_unlock(®_regdb_apply_mutex);
rtnl_unlock();
}
-static DECLARE_WORK(reg_regdb_work, reg_regdb_search);
+static DECLARE_WORK(reg_regdb_work, reg_regdb_apply);
-static void reg_regdb_query(const char *alpha2)
+static int reg_query_builtin(const char *alpha2)
{
- struct reg_regdb_search_request *request;
+ const struct ieee80211_regdomain *regdom = NULL;
+ struct reg_regdb_apply_request *request;
+ unsigned int i;
+
+ for (i = 0; i < reg_regdb_size; i++) {
+ if (alpha2_equal(alpha2, reg_regdb[i]->alpha2)) {
+ regdom = reg_regdb[i];
+ break;
+ }
+ }
+
+ if (!regdom)
+ return -ENODATA;
- request = kzalloc(sizeof(struct reg_regdb_search_request), GFP_KERNEL);
+ request = kzalloc(sizeof(struct reg_regdb_apply_request), GFP_KERNEL);
if (!request)
- return;
+ return -ENOMEM;
- memcpy(request->alpha2, alpha2, 2);
+ request->regdom = reg_copy_regd(regdom);
+ if (IS_ERR_OR_NULL(request->regdom)) {
+ kfree(request);
+ return -ENOMEM;
+ }
- mutex_lock(®_regdb_search_mutex);
- list_add_tail(&request->list, ®_regdb_search_list);
- mutex_unlock(®_regdb_search_mutex);
+ mutex_lock(®_regdb_apply_mutex);
+ list_add_tail(&request->list, ®_regdb_apply_list);
+ mutex_unlock(®_regdb_apply_mutex);
schedule_work(®_regdb_work);
+
+ return 0;
}
/* Feel free to add any other sanity checks here */
}
#else
static inline void reg_regdb_size_check(void) {}
-static inline void reg_regdb_query(const char *alpha2) {}
+static inline int reg_query_builtin(const char *alpha2)
+{
+ return -ENODATA;
+}
#endif /* CONFIG_CFG80211_INTERNAL_REGDB */
+#ifdef CONFIG_CFG80211_CRDA_SUPPORT
+/* Max number of consecutive attempts to communicate with CRDA */
+#define REG_MAX_CRDA_TIMEOUTS 10
+
+static u32 reg_crda_timeouts;
+
+static void crda_timeout_work(struct work_struct *work);
+static DECLARE_DELAYED_WORK(crda_timeout, crda_timeout_work);
+
+static void crda_timeout_work(struct work_struct *work)
+{
+ REG_DBG_PRINT("Timeout while waiting for CRDA to reply, restoring regulatory settings\n");
+ rtnl_lock();
+ reg_crda_timeouts++;
+ restore_regulatory_settings(true);
+ rtnl_unlock();
+}
+
+static void cancel_crda_timeout(void)
+{
+ cancel_delayed_work(&crda_timeout);
+}
+
+static void cancel_crda_timeout_sync(void)
+{
+ cancel_delayed_work_sync(&crda_timeout);
+}
+
+static void reset_crda_timeouts(void)
+{
+ reg_crda_timeouts = 0;
+}
+
/*
* This lets us keep regulatory code which is updated on a regulatory
* basis in userspace.
{
char country[12];
char *env[] = { country, NULL };
+ int ret;
snprintf(country, sizeof(country), "COUNTRY=%c%c",
alpha2[0], alpha2[1]);
- /* query internal regulatory database (if it exists) */
- reg_regdb_query(alpha2);
-
if (reg_crda_timeouts > REG_MAX_CRDA_TIMEOUTS) {
pr_debug("Exceeded CRDA call max attempts. Not calling CRDA\n");
return -EINVAL;
else
pr_debug("Calling CRDA to update world regulatory domain\n");
- return kobject_uevent_env(®_pdev->dev.kobj, KOBJ_CHANGE, env);
+ ret = kobject_uevent_env(®_pdev->dev.kobj, KOBJ_CHANGE, env);
+ if (ret)
+ return ret;
+
+ queue_delayed_work(system_power_efficient_wq,
+ &crda_timeout, msecs_to_jiffies(3142));
+ return 0;
+}
+#else
+static inline void cancel_crda_timeout(void) {}
+static inline void cancel_crda_timeout_sync(void) {}
+static inline void reset_crda_timeouts(void) {}
+static inline int call_crda(const char *alpha2)
+{
+ return -ENODATA;
}
+#endif /* CONFIG_CFG80211_CRDA_SUPPORT */
-static bool reg_call_crda(struct regulatory_request *request)
+static bool reg_query_database(struct regulatory_request *request)
{
- if (call_crda(request->alpha2))
- return false;
+ /* query internal regulatory database (if it exists) */
+ if (reg_query_builtin(request->alpha2) == 0)
+ return true;
- queue_delayed_work(system_power_efficient_wq,
- ®_timeout, msecs_to_jiffies(3142));
- return true;
+ if (call_crda(request->alpha2) == 0)
+ return true;
+
+ return false;
}
bool reg_is_valid_request(const char *alpha2)
}
EXPORT_SYMBOL(reg_initiator_name);
-#ifdef CONFIG_CFG80211_REG_DEBUG
static void chan_reg_rule_print_dbg(const struct ieee80211_regdomain *regd,
struct ieee80211_channel *chan,
const struct ieee80211_reg_rule *reg_rule)
{
+#ifdef CONFIG_CFG80211_REG_DEBUG
const struct ieee80211_power_rule *power_rule;
const struct ieee80211_freq_range *freq_range;
char max_antenna_gain[32], bw[32];
if (!power_rule->max_antenna_gain)
snprintf(max_antenna_gain, sizeof(max_antenna_gain), "N/A");
else
- snprintf(max_antenna_gain, sizeof(max_antenna_gain), "%d",
+ snprintf(max_antenna_gain, sizeof(max_antenna_gain), "%d mBi",
power_rule->max_antenna_gain);
if (reg_rule->flags & NL80211_RRF_AUTO_BW)
REG_DBG_PRINT("Updating information on frequency %d MHz with regulatory rule:\n",
chan->center_freq);
- REG_DBG_PRINT("%d KHz - %d KHz @ %s), (%s mBi, %d mBm)\n",
+ REG_DBG_PRINT("(%d KHz - %d KHz @ %s), (%s, %d mBm)\n",
freq_range->start_freq_khz, freq_range->end_freq_khz,
bw, max_antenna_gain,
power_rule->max_eirp);
-}
-#else
-static void chan_reg_rule_print_dbg(const struct ieee80211_regdomain *regd,
- struct ieee80211_channel *chan,
- const struct ieee80211_reg_rule *reg_rule)
-{
- return;
-}
#endif
+}
/*
* Note that right now we assume the desired channel bandwidth
return !(wiphy->features & NL80211_FEATURE_CELL_BASE_REG_HINTS);
}
#else
-static int reg_ignore_cell_hint(struct regulatory_request *pending_request)
+static enum reg_request_treatment
+reg_ignore_cell_hint(struct regulatory_request *pending_request)
{
return REG_REQ_IGNORE;
}
need_more_processing = true;
spin_unlock(®_requests_lock);
- cancel_delayed_work(®_timeout);
+ cancel_crda_timeout();
if (need_more_processing)
schedule_work(®_work);
* The wireless subsystem can use this function to process
* a regulatory request issued by the regulatory core.
*/
-static void reg_process_hint_core(struct regulatory_request *core_request)
+static enum reg_request_treatment
+reg_process_hint_core(struct regulatory_request *core_request)
{
- if (reg_call_crda(core_request)) {
+ if (reg_query_database(core_request)) {
core_request->intersect = false;
core_request->processed = false;
reg_update_last_request(core_request);
+ return REG_REQ_OK;
}
+
+ return REG_REQ_IGNORE;
}
static enum reg_request_treatment
* The wireless subsystem can use this function to process
* a regulatory request initiated by userspace.
*/
-static void reg_process_hint_user(struct regulatory_request *user_request)
+static enum reg_request_treatment
+reg_process_hint_user(struct regulatory_request *user_request)
{
enum reg_request_treatment treatment;
treatment = __reg_process_hint_user(user_request);
if (treatment == REG_REQ_IGNORE ||
- treatment == REG_REQ_ALREADY_SET) {
- reg_free_request(user_request);
- return;
- }
+ treatment == REG_REQ_ALREADY_SET)
+ return REG_REQ_IGNORE;
user_request->intersect = treatment == REG_REQ_INTERSECT;
user_request->processed = false;
- if (reg_call_crda(user_request)) {
+ if (reg_query_database(user_request)) {
reg_update_last_request(user_request);
user_alpha2[0] = user_request->alpha2[0];
user_alpha2[1] = user_request->alpha2[1];
- } else {
- reg_free_request(user_request);
+ return REG_REQ_OK;
}
+
+ return REG_REQ_IGNORE;
}
static enum reg_request_treatment
case REG_REQ_OK:
break;
case REG_REQ_IGNORE:
- reg_free_request(driver_request);
- return treatment;
+ return REG_REQ_IGNORE;
case REG_REQ_INTERSECT:
- /* fall through */
case REG_REQ_ALREADY_SET:
regd = reg_copy_regd(get_cfg80211_regdom());
- if (IS_ERR(regd)) {
- reg_free_request(driver_request);
+ if (IS_ERR(regd))
return REG_REQ_IGNORE;
- }
tmp = get_wiphy_regdom(wiphy);
rcu_assign_pointer(wiphy->regd, regd);
nl80211_send_reg_change_event(driver_request);
reg_update_last_request(driver_request);
reg_set_request_processed();
- return treatment;
+ return REG_REQ_ALREADY_SET;
}
- if (reg_call_crda(driver_request))
+ if (reg_query_database(driver_request)) {
reg_update_last_request(driver_request);
- else
- reg_free_request(driver_request);
+ return REG_REQ_OK;
+ }
- return REG_REQ_OK;
+ return REG_REQ_IGNORE;
}
static enum reg_request_treatment
case REG_REQ_OK:
break;
case REG_REQ_IGNORE:
- /* fall through */
+ return REG_REQ_IGNORE;
case REG_REQ_ALREADY_SET:
reg_free_request(country_ie_request);
- return treatment;
+ return REG_REQ_ALREADY_SET;
case REG_REQ_INTERSECT:
- reg_free_request(country_ie_request);
/*
* This doesn't happen yet, not sure we
* ever want to support it for this case.
country_ie_request->intersect = false;
country_ie_request->processed = false;
- if (reg_call_crda(country_ie_request))
+ if (reg_query_database(country_ie_request)) {
reg_update_last_request(country_ie_request);
- else
- reg_free_request(country_ie_request);
+ return REG_REQ_OK;
+ }
- return REG_REQ_OK;
+ return REG_REQ_IGNORE;
}
/* This processes *all* regulatory hints */
switch (reg_request->initiator) {
case NL80211_REGDOM_SET_BY_CORE:
- reg_process_hint_core(reg_request);
- return;
+ treatment = reg_process_hint_core(reg_request);
+ break;
case NL80211_REGDOM_SET_BY_USER:
- reg_process_hint_user(reg_request);
- return;
+ treatment = reg_process_hint_user(reg_request);
+ break;
case NL80211_REGDOM_SET_BY_DRIVER:
if (!wiphy)
goto out_free;
goto out_free;
}
+ if (treatment == REG_REQ_IGNORE)
+ goto out_free;
+
+ WARN(treatment != REG_REQ_OK && treatment != REG_REQ_ALREADY_SET,
+ "unexpected treatment value %d\n", treatment);
+
/* This is required so that the orig_* parameters are saved.
* NOTE: treatment must be set for any case that reaches here!
*/
request->user_reg_hint_type = user_reg_hint_type;
/* Allow calling CRDA again */
- reg_crda_timeouts = 0;
+ reset_crda_timeouts();
queue_regulatory_request(request);
request->initiator = NL80211_REGDOM_SET_BY_DRIVER;
/* Allow calling CRDA again */
- reg_crda_timeouts = 0;
+ reset_crda_timeouts();
queue_regulatory_request(request);
request->country_ie_env = env;
/* Allow calling CRDA again */
- reg_crda_timeouts = 0;
+ reset_crda_timeouts();
queue_regulatory_request(request);
request = NULL;
}
request_wiphy = wiphy_idx_to_wiphy(driver_request->wiphy_idx);
- if (!request_wiphy) {
- queue_delayed_work(system_power_efficient_wq,
- ®_timeout, 0);
+ if (!request_wiphy)
return -ENODEV;
- }
if (!driver_request->intersect) {
if (request_wiphy->regd)
}
request_wiphy = wiphy_idx_to_wiphy(country_ie_request->wiphy_idx);
- if (!request_wiphy) {
- queue_delayed_work(system_power_efficient_wq,
- ®_timeout, 0);
+ if (!request_wiphy)
return -ENODEV;
- }
if (country_ie_request->intersect)
return -EINVAL;
}
if (regd_src == REGD_SOURCE_CRDA)
- reg_crda_timeouts = 0;
+ reset_crda_timeouts();
lr = get_last_request();
lr->country_ie_env = ENVIRON_ANY;
}
-static void reg_timeout_work(struct work_struct *work)
-{
- REG_DBG_PRINT("Timeout while waiting for CRDA to reply, restoring regulatory settings\n");
- rtnl_lock();
- reg_crda_timeouts++;
- restore_regulatory_settings(true);
- rtnl_unlock();
-}
-
/*
* See http://www.fcc.gov/document/5-ghz-unlicensed-spectrum-unii, for
* UNII band definitions
struct reg_beacon *reg_beacon, *btmp;
cancel_work_sync(®_work);
- cancel_delayed_work_sync(®_timeout);
+ cancel_crda_timeout_sync();
cancel_delayed_work_sync(®_check_chans);
/* Lock to suppress warnings */