* rely on some SHA1 checksum of the regdomain for example.
*
*/
+
+#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
+
#include <linux/kernel.h>
#include <linux/slab.h>
#include <linux/list.h>
#ifdef CONFIG_CFG80211_REG_DEBUG
#define REG_DBG_PRINT(format, args...) \
do { \
- printk(KERN_DEBUG format , ## args); \
+ printk(KERN_DEBUG pr_fmt(format), ##args); \
} while (0)
#else
#define REG_DBG_PRINT(args...)
/* To trigger userspace events */
static struct platform_device *reg_pdev;
+static struct device_type reg_device_type = {
+ .uevent = reg_device_uevent,
+};
+
/*
* Central wireless core regulatory domains, we only need two,
* the current one and a world regulatory domain in case we have no
struct ieee80211_channel chan;
};
+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 = 5,
/*
* This lets us keep regulatory code which is updated on a regulatory
- * basis in userspace.
+ * basis in userspace. Country information is filled in by
+ * reg_device_uevent
*/
static int call_crda(const char *alpha2)
{
- char country_env[9 + 2] = "COUNTRY=";
- char *envp[] = {
- country_env,
- NULL
- };
-
if (!is_world_regdom((char *) alpha2))
- printk(KERN_INFO "cfg80211: Calling CRDA for country: %c%c\n",
+ pr_info("Calling CRDA for country: %c%c\n",
alpha2[0], alpha2[1]);
else
- printk(KERN_INFO "cfg80211: Calling CRDA to update world "
- "regulatory domain\n");
+ pr_info("Calling CRDA to update world regulatory domain\n");
/* query internal regulatory database (if it exists) */
reg_regdb_query(alpha2);
- country_env[8] = alpha2[0];
- country_env[9] = alpha2[1];
-
- return kobject_uevent_env(®_pdev->dev.kobj, KOBJ_CHANGE, envp);
+ return kobject_uevent(®_pdev->dev.kobj, KOBJ_CHANGE);
}
/* Used by nl80211 before kmalloc'ing our regulatory domain */
* Follow the driver's regulatory domain, if present, unless a country
* IE has been processed or a user wants to help complaince further
*/
- if (last_request->initiator != NL80211_REGDOM_SET_BY_COUNTRY_IE &&
+ if (!custom_regd &&
+ last_request->initiator != NL80211_REGDOM_SET_BY_COUNTRY_IE &&
last_request->initiator != NL80211_REGDOM_SET_BY_USER &&
wiphy->regd)
regd = wiphy->regd;
}
EXPORT_SYMBOL(freq_reg_info);
+#ifdef CONFIG_CFG80211_REG_DEBUG
+static const char *reg_initiator_name(enum nl80211_reg_initiator initiator)
+{
+ switch (initiator) {
+ case NL80211_REGDOM_SET_BY_CORE:
+ return "Set by core";
+ case NL80211_REGDOM_SET_BY_USER:
+ return "Set by user";
+ case NL80211_REGDOM_SET_BY_DRIVER:
+ return "Set by driver";
+ case NL80211_REGDOM_SET_BY_COUNTRY_IE:
+ return "Set by country IE";
+ default:
+ WARN_ON(1);
+ return "Set by bug";
+ }
+}
+
+static void chan_reg_rule_print_dbg(struct ieee80211_channel *chan,
+ u32 desired_bw_khz,
+ const struct ieee80211_reg_rule *reg_rule)
+{
+ const struct ieee80211_power_rule *power_rule;
+ const struct ieee80211_freq_range *freq_range;
+ char max_antenna_gain[32];
+
+ power_rule = ®_rule->power_rule;
+ freq_range = ®_rule->freq_range;
+
+ if (!power_rule->max_antenna_gain)
+ snprintf(max_antenna_gain, 32, "N/A");
+ else
+ snprintf(max_antenna_gain, 32, "%d", power_rule->max_antenna_gain);
+
+ REG_DBG_PRINT("Updating information on frequency %d MHz "
+ "for a %d MHz width channel with regulatory rule:\n",
+ chan->center_freq,
+ KHZ_TO_MHZ(desired_bw_khz));
+
+ REG_DBG_PRINT("%d KHz - %d KHz @ KHz), (%s mBi, %d mBm)\n",
+ freq_range->start_freq_khz,
+ freq_range->end_freq_khz,
+ max_antenna_gain,
+ power_rule->max_eirp);
+}
+#else
+static void chan_reg_rule_print_dbg(struct ieee80211_channel *chan,
+ u32 desired_bw_khz,
+ const struct ieee80211_reg_rule *reg_rule)
+{
+ return;
+}
+#endif
+
/*
* Note that right now we assume the desired channel bandwidth
* is always 20 MHz for each individual channel (HT40 uses 20 MHz
desired_bw_khz,
®_rule);
- if (r)
+ if (r) {
+ /*
+ * We will disable all channels that do not match our
+ * received regulatory rule unless the hint is coming
+ * from a Country IE and the Country IE had no information
+ * about a band. The IEEE 802.11 spec allows for an AP
+ * to send only a subset of the regulatory rules allowed,
+ * so an AP in the US that only supports 2.4 GHz may only send
+ * a country IE with information for the 2.4 GHz band
+ * while 5 GHz is still supported.
+ */
+ if (initiator == NL80211_REGDOM_SET_BY_COUNTRY_IE &&
+ r == -ERANGE)
+ return;
+
+ REG_DBG_PRINT("Disabling freq %d MHz\n", chan->center_freq);
+ chan->flags = IEEE80211_CHAN_DISABLED;
return;
+ }
+
+ chan_reg_rule_print_dbg(chan, desired_bw_khz, reg_rule);
power_rule = ®_rule->power_rule;
freq_range = ®_rule->freq_range;
request_wiphy && request_wiphy == wiphy &&
request_wiphy->flags & WIPHY_FLAG_STRICT_REGULATORY) {
/*
- * This gaurantees the driver's requested regulatory domain
+ * This guarantees the driver's requested regulatory domain
* will always be used as a base for further regulatory
* settings
*/
static bool ignore_reg_update(struct wiphy *wiphy,
enum nl80211_reg_initiator initiator)
{
- if (!last_request)
+ if (!last_request) {
+ REG_DBG_PRINT("Ignoring regulatory request %s since "
+ "last_request is not set\n",
+ reg_initiator_name(initiator));
return true;
+ }
+
if (initiator == NL80211_REGDOM_SET_BY_CORE &&
- wiphy->flags & WIPHY_FLAG_CUSTOM_REGULATORY)
+ wiphy->flags & WIPHY_FLAG_CUSTOM_REGULATORY) {
+ REG_DBG_PRINT("Ignoring regulatory request %s "
+ "since the driver uses its own custom "
+ "regulatory domain ",
+ reg_initiator_name(initiator));
return true;
+ }
+
/*
* wiphy->regd will be set once the device has its own
* desired regulatory domain set
*/
if (wiphy->flags & WIPHY_FLAG_STRICT_REGULATORY && !wiphy->regd &&
- !is_world_regdom(last_request->alpha2))
+ initiator != NL80211_REGDOM_SET_BY_COUNTRY_IE &&
+ !is_world_regdom(last_request->alpha2)) {
+ REG_DBG_PRINT("Ignoring regulatory request %s "
+ "since the driver requires its own regulaotry "
+ "domain to be set first",
+ reg_initiator_name(initiator));
return true;
+ }
+
return false;
}
regd);
if (r) {
+ REG_DBG_PRINT("Disabling freq %d MHz as custom "
+ "regd has no rule that fits a %d MHz "
+ "wide channel\n",
+ chan->center_freq,
+ KHZ_TO_MHZ(desired_bw_khz));
chan->flags = IEEE80211_CHAN_DISABLED;
return;
}
+ chan_reg_rule_print_dbg(chan, desired_bw_khz, reg_rule);
+
power_rule = ®_rule->power_rule;
freq_range = ®_rule->freq_range;
return -EINVAL;
}
+static void reg_set_request_processed(void)
+{
+ bool need_more_processing = false;
+
+ last_request->processed = true;
+
+ spin_lock(®_requests_lock);
+ if (!list_empty(®_requests_list))
+ need_more_processing = true;
+ spin_unlock(®_requests_lock);
+
+ if (last_request->initiator == NL80211_REGDOM_SET_BY_USER)
+ cancel_delayed_work_sync(®_timeout);
+
+ if (need_more_processing)
+ schedule_work(®_work);
+}
+
/**
* __regulatory_hint - hint to the wireless core a regulatory domain
* @wiphy: if the hint comes from country information from an AP, this
* have applied the requested regulatory domain before we just
* inform userspace we have processed the request
*/
- if (r == -EALREADY)
+ if (r == -EALREADY) {
nl80211_send_reg_change_event(last_request);
+ reg_set_request_processed();
+ }
return r;
}
BUG_ON(!reg_request->alpha2);
- mutex_lock(&cfg80211_mutex);
- mutex_lock(®_mutex);
-
if (wiphy_idx_valid(reg_request->wiphy_idx))
wiphy = wiphy_idx_to_wiphy(reg_request->wiphy_idx);
if (reg_request->initiator == NL80211_REGDOM_SET_BY_DRIVER &&
!wiphy) {
kfree(reg_request);
- goto out;
+ return;
}
r = __regulatory_hint(wiphy, reg_request);
/* This is required so that the orig_* parameters are saved */
if (r == -EALREADY && wiphy &&
- wiphy->flags & WIPHY_FLAG_STRICT_REGULATORY)
+ wiphy->flags & WIPHY_FLAG_STRICT_REGULATORY) {
wiphy_update_regulatory(wiphy, initiator);
-out:
- mutex_unlock(®_mutex);
- mutex_unlock(&cfg80211_mutex);
+ return;
+ }
+
+ /*
+ * We only time out user hints, given that they should be the only
+ * source of bogus requests.
+ */
+ if (reg_request->initiator == NL80211_REGDOM_SET_BY_USER)
+ schedule_delayed_work(®_timeout, msecs_to_jiffies(3142));
}
-/* Processes regulatory hints, this is all the NL80211_REGDOM_SET_BY_* */
+/*
+ * Processes regulatory hints, this is all the NL80211_REGDOM_SET_BY_*
+ * Regulatory hints come on a first come first serve basis and we
+ * must process each one atomically.
+ */
static void reg_process_pending_hints(void)
- {
+{
struct regulatory_request *reg_request;
+ mutex_lock(&cfg80211_mutex);
+ mutex_lock(®_mutex);
+
+ /* When last_request->processed becomes true this will be rescheduled */
+ if (last_request && !last_request->processed) {
+ REG_DBG_PRINT("Pending regulatory request, waiting "
+ "for it to be processed...");
+ goto out;
+ }
+
spin_lock(®_requests_lock);
- while (!list_empty(®_requests_list)) {
- reg_request = list_first_entry(®_requests_list,
- struct regulatory_request,
- list);
- list_del_init(®_request->list);
+ if (list_empty(®_requests_list)) {
spin_unlock(®_requests_lock);
- reg_process_hint(reg_request);
- spin_lock(®_requests_lock);
+ goto out;
}
+
+ reg_request = list_first_entry(®_requests_list,
+ struct regulatory_request,
+ list);
+ list_del_init(®_request->list);
+
spin_unlock(®_requests_lock);
+
+ reg_process_hint(reg_request);
+
+out:
+ mutex_unlock(®_mutex);
+ mutex_unlock(&cfg80211_mutex);
}
/* Processes beacon hints -- this has nothing to do with country IEs */
reg_process_pending_beacon_hints();
}
-static DECLARE_WORK(reg_work, reg_todo);
-
static void queue_regulatory_request(struct regulatory_request *request)
{
if (isalpha(request->alpha2[0]))
request->alpha2[1] = alpha2[1];
request->initiator = NL80211_REGDOM_SET_BY_CORE;
- /*
- * This ensures last_request is populated once modules
- * come swinging in and calling regulatory hints and
- * wiphy_apply_custom_regulatory().
- */
- reg_process_hint(request);
+ queue_regulatory_request(request);
return 0;
}
if (is_user_regdom_saved()) {
/* Unless we're asked to ignore it and reset it */
if (reset_user) {
- REG_DBG_PRINT("cfg80211: Restoring regulatory settings "
+ REG_DBG_PRINT("Restoring regulatory settings "
"including user preference\n");
user_alpha2[0] = '9';
user_alpha2[1] = '7';
* back as they were for a full restore.
*/
if (!is_world_regdom(ieee80211_regdom)) {
- REG_DBG_PRINT("cfg80211: Keeping preference on "
+ REG_DBG_PRINT("Keeping preference on "
"module parameter ieee80211_regdom: %c%c\n",
ieee80211_regdom[0],
ieee80211_regdom[1]);
alpha2[1] = ieee80211_regdom[1];
}
} else {
- REG_DBG_PRINT("cfg80211: Restoring regulatory settings "
+ REG_DBG_PRINT("Restoring regulatory settings "
"while preserving user preference for: %c%c\n",
user_alpha2[0],
user_alpha2[1]);
alpha2[1] = user_alpha2[1];
}
} else if (!is_world_regdom(ieee80211_regdom)) {
- REG_DBG_PRINT("cfg80211: Keeping preference on "
+ REG_DBG_PRINT("Keeping preference on "
"module parameter ieee80211_regdom: %c%c\n",
ieee80211_regdom[0],
ieee80211_regdom[1]);
alpha2[0] = ieee80211_regdom[0];
alpha2[1] = ieee80211_regdom[1];
} else
- REG_DBG_PRINT("cfg80211: Restoring regulatory settings\n");
+ REG_DBG_PRINT("Restoring regulatory settings\n");
}
/*
{
char alpha2[2];
struct reg_beacon *reg_beacon, *btmp;
+ struct regulatory_request *reg_request, *tmp;
+ LIST_HEAD(tmp_reg_req_list);
mutex_lock(&cfg80211_mutex);
mutex_lock(®_mutex);
reset_regdomains();
restore_alpha2(alpha2, reset_user);
+ /*
+ * If there's any pending requests we simply
+ * stash them to a temporary pending queue and
+ * add then after we've restored regulatory
+ * settings.
+ */
+ spin_lock(®_requests_lock);
+ if (!list_empty(®_requests_list)) {
+ list_for_each_entry_safe(reg_request, tmp,
+ ®_requests_list, list) {
+ if (reg_request->initiator !=
+ NL80211_REGDOM_SET_BY_USER)
+ continue;
+ list_del(®_request->list);
+ list_add_tail(®_request->list, &tmp_reg_req_list);
+ }
+ }
+ spin_unlock(®_requests_lock);
+
/* Clear beacon hints */
spin_lock_bh(®_pending_beacons_lock);
if (!list_empty(®_pending_beacons)) {
*/
if (is_an_alpha2(alpha2))
regulatory_hint_user(user_alpha2);
-}
+ if (list_empty(&tmp_reg_req_list))
+ return;
+
+ mutex_lock(&cfg80211_mutex);
+ mutex_lock(®_mutex);
+
+ spin_lock(®_requests_lock);
+ list_for_each_entry_safe(reg_request, tmp, &tmp_reg_req_list, list) {
+ REG_DBG_PRINT("Adding request for country %c%c back "
+ "into the queue\n",
+ reg_request->alpha2[0],
+ reg_request->alpha2[1]);
+ list_del(®_request->list);
+ list_add_tail(®_request->list, ®_requests_list);
+ }
+ spin_unlock(®_requests_lock);
+
+ mutex_unlock(®_mutex);
+ mutex_unlock(&cfg80211_mutex);
+
+ REG_DBG_PRINT("Kicking the queue\n");
+
+ schedule_work(®_work);
+}
void regulatory_hint_disconnect(void)
{
- REG_DBG_PRINT("cfg80211: All devices are disconnected, going to "
+ REG_DBG_PRINT("All devices are disconnected, going to "
"restore regulatory settings\n");
restore_regulatory_settings(false);
}
static bool freq_is_chan_12_13_14(u16 freq)
{
- if (freq == ieee80211_channel_to_frequency(12) ||
- freq == ieee80211_channel_to_frequency(13) ||
- freq == ieee80211_channel_to_frequency(14))
+ if (freq == ieee80211_channel_to_frequency(12, IEEE80211_BAND_2GHZ) ||
+ freq == ieee80211_channel_to_frequency(13, IEEE80211_BAND_2GHZ) ||
+ freq == ieee80211_channel_to_frequency(14, IEEE80211_BAND_2GHZ))
return true;
return false;
}
if (!reg_beacon)
return -ENOMEM;
- REG_DBG_PRINT("cfg80211: Found new beacon on "
+ REG_DBG_PRINT("Found new beacon on "
"frequency: %d MHz (Ch %d) on %s\n",
beacon_chan->center_freq,
ieee80211_frequency_to_channel(beacon_chan->center_freq),
const struct ieee80211_freq_range *freq_range = NULL;
const struct ieee80211_power_rule *power_rule = NULL;
- printk(KERN_INFO " (start_freq - end_freq @ bandwidth), "
- "(max_antenna_gain, max_eirp)\n");
+ pr_info(" (start_freq - end_freq @ bandwidth), (max_antenna_gain, max_eirp)\n");
for (i = 0; i < rd->n_reg_rules; i++) {
reg_rule = &rd->reg_rules[i];
* in certain regions
*/
if (power_rule->max_antenna_gain)
- printk(KERN_INFO " (%d KHz - %d KHz @ %d KHz), "
- "(%d mBi, %d mBm)\n",
+ pr_info(" (%d KHz - %d KHz @ %d KHz), (%d mBi, %d mBm)\n",
freq_range->start_freq_khz,
freq_range->end_freq_khz,
freq_range->max_bandwidth_khz,
power_rule->max_antenna_gain,
power_rule->max_eirp);
else
- printk(KERN_INFO " (%d KHz - %d KHz @ %d KHz), "
- "(N/A, %d mBm)\n",
+ pr_info(" (%d KHz - %d KHz @ %d KHz), (N/A, %d mBm)\n",
freq_range->start_freq_khz,
freq_range->end_freq_khz,
freq_range->max_bandwidth_khz,
rdev = cfg80211_rdev_by_wiphy_idx(
last_request->wiphy_idx);
if (rdev) {
- printk(KERN_INFO "cfg80211: Current regulatory "
- "domain updated by AP to: %c%c\n",
+ pr_info("Current regulatory domain updated by AP to: %c%c\n",
rdev->country_ie_alpha2[0],
rdev->country_ie_alpha2[1]);
} else
- printk(KERN_INFO "cfg80211: Current regulatory "
- "domain intersected:\n");
+ pr_info("Current regulatory domain intersected:\n");
} else
- printk(KERN_INFO "cfg80211: Current regulatory "
- "domain intersected:\n");
+ pr_info("Current regulatory domain intersected:\n");
} else if (is_world_regdom(rd->alpha2))
- printk(KERN_INFO "cfg80211: World regulatory "
- "domain updated:\n");
+ pr_info("World regulatory domain updated:\n");
else {
if (is_unknown_alpha2(rd->alpha2))
- printk(KERN_INFO "cfg80211: Regulatory domain "
- "changed to driver built-in settings "
- "(unknown country)\n");
+ pr_info("Regulatory domain changed to driver built-in settings (unknown country)\n");
else
- printk(KERN_INFO "cfg80211: Regulatory domain "
- "changed to country: %c%c\n",
+ pr_info("Regulatory domain changed to country: %c%c\n",
rd->alpha2[0], rd->alpha2[1]);
}
print_rd_rules(rd);
static void print_regdomain_info(const struct ieee80211_regdomain *rd)
{
- printk(KERN_INFO "cfg80211: Regulatory domain: %c%c\n",
- rd->alpha2[0], rd->alpha2[1]);
+ pr_info("Regulatory domain: %c%c\n", rd->alpha2[0], rd->alpha2[1]);
print_rd_rules(rd);
}
return -EINVAL;
if (!is_valid_rd(rd)) {
- printk(KERN_ERR "cfg80211: Invalid "
- "regulatory domain detected:\n");
+ pr_err("Invalid regulatory domain detected:\n");
print_regdomain_info(rd);
return -EINVAL;
}
nl80211_send_reg_change_event(last_request);
+ reg_set_request_processed();
+
mutex_unlock(®_mutex);
return r;
}
+#ifdef CONFIG_HOTPLUG
+int reg_device_uevent(struct device *dev, struct kobj_uevent_env *env)
+{
+ if (last_request && !last_request->processed) {
+ if (add_uevent_var(env, "COUNTRY=%c%c",
+ last_request->alpha2[0],
+ last_request->alpha2[1]))
+ return -ENOMEM;
+ }
+
+ return 0;
+}
+#else
+int reg_device_uevent(struct device *dev, struct kobj_uevent_env *env)
+{
+ return -ENODEV;
+}
+#endif /* CONFIG_HOTPLUG */
+
/* Caller must hold cfg80211_mutex */
void reg_device_remove(struct wiphy *wiphy)
{
mutex_unlock(®_mutex);
}
+static void reg_timeout_work(struct work_struct *work)
+{
+ REG_DBG_PRINT("Timeout while waiting for CRDA to reply, "
+ "restoring regulatory settings");
+ restore_regulatory_settings(true);
+}
+
int __init regulatory_init(void)
{
int err = 0;
if (IS_ERR(reg_pdev))
return PTR_ERR(reg_pdev);
+ reg_pdev->dev.type = ®_device_type;
+
spin_lock_init(®_requests_lock);
spin_lock_init(®_pending_beacons_lock);
* early boot for call_usermodehelper(). For now treat these
* errors as non-fatal.
*/
- printk(KERN_ERR "cfg80211: kobject_uevent_env() was unable "
- "to call CRDA during init");
+ pr_err("kobject_uevent_env() was unable to call CRDA during init\n");
#ifdef CONFIG_CFG80211_REG_DEBUG
/* We want to find out exactly why when debugging */
WARN_ON(err);
struct reg_beacon *reg_beacon, *btmp;
cancel_work_sync(®_work);
+ cancel_delayed_work_sync(®_timeout);
mutex_lock(&cfg80211_mutex);
mutex_lock(®_mutex);
Code Review / linux-2.6.git / blobdiff