diff options
Diffstat (limited to 'net/wireless/reg.c')
| -rw-r--r-- | net/wireless/reg.c | 1142 |
1 files changed, 514 insertions, 628 deletions
diff --git a/net/wireless/reg.c b/net/wireless/reg.c index 82c4fc7c994c..98532c00242d 100644 --- a/net/wireless/reg.c +++ b/net/wireless/reg.c @@ -48,7 +48,6 @@ #include <linux/export.h> #include <linux/slab.h> #include <linux/list.h> -#include <linux/random.h> #include <linux/ctype.h> #include <linux/nl80211.h> #include <linux/platform_device.h> @@ -66,6 +65,13 @@ #define REG_DBG_PRINT(args...) #endif +enum reg_request_treatment { + REG_REQ_OK, + REG_REQ_IGNORE, + REG_REQ_INTERSECT, + REG_REQ_ALREADY_SET, +}; + static struct regulatory_request core_request_world = { .initiator = NL80211_REGDOM_SET_BY_CORE, .alpha2[0] = '0', @@ -76,7 +82,8 @@ static struct regulatory_request core_request_world = { }; /* Receipt of information from last regulatory request */ -static struct regulatory_request *last_request = &core_request_world; +static struct regulatory_request __rcu *last_request = + (void __rcu *)&core_request_world; /* To trigger userspace events */ static struct platform_device *reg_pdev; @@ -88,16 +95,16 @@ static struct device_type reg_device_type = { /* * Central wireless core regulatory domains, we only need two, * the current one and a world regulatory domain in case we have no - * information to give us an alpha2 + * information to give us an alpha2. */ -const struct ieee80211_regdomain *cfg80211_regdomain; +const struct ieee80211_regdomain __rcu *cfg80211_regdomain; /* * Protects static reg.c components: - * - cfg80211_world_regdom - * - cfg80211_regdom - * - last_request - * - reg_num_devs_support_basehint + * - cfg80211_regdomain (if not used with RCU) + * - cfg80211_world_regdom + * - last_request (if not used with RCU) + * - reg_num_devs_support_basehint */ static DEFINE_MUTEX(reg_mutex); @@ -112,6 +119,31 @@ static inline void assert_reg_lock(void) lockdep_assert_held(®_mutex); } +static const struct ieee80211_regdomain *get_cfg80211_regdom(void) +{ + return rcu_dereference_protected(cfg80211_regdomain, + lockdep_is_held(®_mutex)); +} + +static const struct ieee80211_regdomain *get_wiphy_regdom(struct wiphy *wiphy) +{ + return rcu_dereference_protected(wiphy->regd, + lockdep_is_held(®_mutex)); +} + +static void rcu_free_regdom(const struct ieee80211_regdomain *r) +{ + if (!r) + return; + kfree_rcu((struct ieee80211_regdomain *)r, rcu_head); +} + +static struct regulatory_request *get_last_request(void) +{ + return rcu_dereference_check(last_request, + lockdep_is_held(®_mutex)); +} + /* Used to queue up regulatory hints */ static LIST_HEAD(reg_requests_list); static spinlock_t reg_requests_lock; @@ -177,28 +209,37 @@ static char user_alpha2[2]; module_param(ieee80211_regdom, charp, 0444); MODULE_PARM_DESC(ieee80211_regdom, "IEEE 802.11 regulatory domain code"); -static void reset_regdomains(bool full_reset) +static void reset_regdomains(bool full_reset, + const struct ieee80211_regdomain *new_regdom) { + const struct ieee80211_regdomain *r; + struct regulatory_request *lr; + + assert_reg_lock(); + + r = get_cfg80211_regdom(); + /* avoid freeing static information or freeing something twice */ - if (cfg80211_regdomain == cfg80211_world_regdom) - cfg80211_regdomain = NULL; + if (r == cfg80211_world_regdom) + r = NULL; if (cfg80211_world_regdom == &world_regdom) cfg80211_world_regdom = NULL; - if (cfg80211_regdomain == &world_regdom) - cfg80211_regdomain = NULL; + if (r == &world_regdom) + r = NULL; - kfree(cfg80211_regdomain); - kfree(cfg80211_world_regdom); + rcu_free_regdom(r); + rcu_free_regdom(cfg80211_world_regdom); cfg80211_world_regdom = &world_regdom; - cfg80211_regdomain = NULL; + rcu_assign_pointer(cfg80211_regdomain, new_regdom); if (!full_reset) return; - if (last_request != &core_request_world) - kfree(last_request); - last_request = &core_request_world; + lr = get_last_request(); + if (lr != &core_request_world && lr) + kfree_rcu(lr, rcu_head); + rcu_assign_pointer(last_request, &core_request_world); } /* @@ -207,30 +248,29 @@ static void reset_regdomains(bool full_reset) */ static void update_world_regdomain(const struct ieee80211_regdomain *rd) { - BUG_ON(!last_request); + struct regulatory_request *lr; + + lr = get_last_request(); + + WARN_ON(!lr); - reset_regdomains(false); + reset_regdomains(false, rd); cfg80211_world_regdom = rd; - cfg80211_regdomain = rd; } bool is_world_regdom(const char *alpha2) { if (!alpha2) return false; - if (alpha2[0] == '0' && alpha2[1] == '0') - return true; - return false; + return alpha2[0] == '0' && alpha2[1] == '0'; } static bool is_alpha2_set(const char *alpha2) { if (!alpha2) return false; - if (alpha2[0] != 0 && alpha2[1] != 0) - return true; - return false; + return alpha2[0] && alpha2[1]; } static bool is_unknown_alpha2(const char *alpha2) @@ -241,9 +281,7 @@ static bool is_unknown_alpha2(const char *alpha2) * Special case where regulatory domain was built by driver * but a specific alpha2 cannot be determined */ - if (alpha2[0] == '9' && alpha2[1] == '9') - return true; - return false; + return alpha2[0] == '9' && alpha2[1] == '9'; } static bool is_intersected_alpha2(const char *alpha2) @@ -255,39 +293,30 @@ static bool is_intersected_alpha2(const char *alpha2) * result of an intersection between two regulatory domain * structures */ - if (alpha2[0] == '9' && alpha2[1] == '8') - return true; - return false; + return alpha2[0] == '9' && alpha2[1] == '8'; } static bool is_an_alpha2(const char *alpha2) { if (!alpha2) return false; - if (isalpha(alpha2[0]) && isalpha(alpha2[1])) - return true; - return false; + return isalpha(alpha2[0]) && isalpha(alpha2[1]); } static bool alpha2_equal(const char *alpha2_x, const char *alpha2_y) { if (!alpha2_x || !alpha2_y) return false; - if (alpha2_x[0] == alpha2_y[0] && - alpha2_x[1] == alpha2_y[1]) - return true; - return false; + return alpha2_x[0] == alpha2_y[0] && alpha2_x[1] == alpha2_y[1]; } static bool regdom_changes(const char *alpha2) { - assert_cfg80211_lock(); + const struct ieee80211_regdomain *r = get_cfg80211_regdom(); - if (!cfg80211_regdomain) + if (!r) return true; - if (alpha2_equal(cfg80211_regdomain->alpha2, alpha2)) - return false; - return true; + return !alpha2_equal(r->alpha2, alpha2); } /* @@ -301,38 +330,36 @@ static bool is_user_regdom_saved(void) return false; /* This would indicate a mistake on the design */ - if (WARN((!is_world_regdom(user_alpha2) && - !is_an_alpha2(user_alpha2)), + if (WARN(!is_world_regdom(user_alpha2) && !is_an_alpha2(user_alpha2), "Unexpected user alpha2: %c%c\n", - user_alpha2[0], - user_alpha2[1])) + user_alpha2[0], user_alpha2[1])) return false; return true; } -static int reg_copy_regd(const struct ieee80211_regdomain **dst_regd, - const struct ieee80211_regdomain *src_regd) +static const struct ieee80211_regdomain * +reg_copy_regd(const struct ieee80211_regdomain *src_regd) { struct ieee80211_regdomain *regd; - int size_of_regd = 0; + int size_of_regd; unsigned int i; - size_of_regd = sizeof(struct ieee80211_regdomain) + - ((src_regd->n_reg_rules + 1) * sizeof(struct ieee80211_reg_rule)); + size_of_regd = + sizeof(struct ieee80211_regdomain) + + src_regd->n_reg_rules * sizeof(struct ieee80211_reg_rule); regd = kzalloc(size_of_regd, GFP_KERNEL); if (!regd) - return -ENOMEM; + return ERR_PTR(-ENOMEM); memcpy(regd, src_regd, sizeof(struct ieee80211_regdomain)); for (i = 0; i < src_regd->n_reg_rules; i++) memcpy(®d->reg_rules[i], &src_regd->reg_rules[i], - sizeof(struct ieee80211_reg_rule)); + sizeof(struct ieee80211_reg_rule)); - *dst_regd = regd; - return 0; + return regd; } #ifdef CONFIG_CFG80211_INTERNAL_REGDB @@ -347,9 +374,8 @@ static DEFINE_MUTEX(reg_regdb_search_mutex); static void reg_regdb_search(struct work_struct *work) { struct reg_regdb_search_request *request; - const struct ieee80211_regdomain *curdom, *regdom; - int i, r; - bool set_reg = false; + const struct ieee80211_regdomain *curdom, *regdom = NULL; + int i; mutex_lock(&cfg80211_mutex); @@ -360,14 +386,11 @@ static void reg_regdb_search(struct work_struct *work) list); list_del(&request->list); - for (i=0; i<reg_regdb_size; i++) { + for (i = 0; i < reg_regdb_size; i++) { curdom = reg_regdb[i]; - if (!memcmp(request->alpha2, curdom->alpha2, 2)) { - r = reg_copy_regd(®dom, curdom); - if (r) - break; - set_reg = true; + if (alpha2_equal(request->alpha2, curdom->alpha2)) { + regdom = reg_copy_regd(curdom); break; } } @@ -376,7 +399,7 @@ static void reg_regdb_search(struct work_struct *work) } mutex_unlock(®_regdb_search_mutex); - if (set_reg) + if (!IS_ERR_OR_NULL(regdom)) set_regdom(regdom); mutex_unlock(&cfg80211_mutex); @@ -434,15 +457,14 @@ static int call_crda(const char *alpha2) return kobject_uevent(®_pdev->dev.kobj, KOBJ_CHANGE); } -/* Used by nl80211 before kmalloc'ing our regulatory domain */ -bool reg_is_valid_request(const char *alpha2) +static bool reg_is_valid_request(const char *alpha2) { - assert_cfg80211_lock(); + struct regulatory_request *lr = get_last_request(); - if (!last_request) + if (!lr || lr->processed) return false; - return alpha2_equal(last_request->alpha2, alpha2); + return alpha2_equal(lr->alpha2, alpha2); } /* Sanity check on a regulatory rule */ @@ -460,7 +482,7 @@ static bool is_valid_reg_rule(const struct ieee80211_reg_rule *rule) freq_diff = freq_range->end_freq_khz - freq_range->start_freq_khz; if (freq_range->end_freq_khz <= freq_range->start_freq_khz || - freq_range->max_bandwidth_khz > freq_diff) + freq_range->max_bandwidth_khz > freq_diff) return false; return true; @@ -487,8 +509,7 @@ static bool is_valid_rd(const struct ieee80211_regdomain *rd) } static bool reg_does_bw_fit(const struct ieee80211_freq_range *freq_range, - u32 center_freq_khz, - u32 bw_khz) + u32 center_freq_khz, u32 bw_khz) { u32 start_freq_khz, end_freq_khz; @@ -518,7 +539,7 @@ static bool reg_does_bw_fit(const struct ieee80211_freq_range *freq_range, * regulatory rule support for other "bands". **/ static bool freq_in_rule_band(const struct ieee80211_freq_range *freq_range, - u32 freq_khz) + u32 freq_khz) { #define ONE_GHZ_IN_KHZ 1000000 /* @@ -540,10 +561,9 @@ static bool freq_in_rule_band(const struct ieee80211_freq_range *freq_range, * Helper for regdom_intersect(), this does the real * mathematical intersection fun */ -static int reg_rules_intersect( - const struct ieee80211_reg_rule *rule1, - const struct ieee80211_reg_rule *rule2, - struct ieee80211_reg_rule *intersected_rule) +static int reg_rules_intersect(const struct ieee80211_reg_rule *rule1, + const struct ieee80211_reg_rule *rule2, + struct ieee80211_reg_rule *intersected_rule) { const struct ieee80211_freq_range *freq_range1, *freq_range2; struct ieee80211_freq_range *freq_range; @@ -560,11 +580,11 @@ static int reg_rules_intersect( power_rule = &intersected_rule->power_rule; freq_range->start_freq_khz = max(freq_range1->start_freq_khz, - freq_range2->start_freq_khz); + freq_range2->start_freq_khz); freq_range->end_freq_khz = min(freq_range1->end_freq_khz, - freq_range2->end_freq_khz); + freq_range2->end_freq_khz); freq_range->max_bandwidth_khz = min(freq_range1->max_bandwidth_khz, - freq_range2->max_bandwidth_khz); + freq_range2->max_bandwidth_khz); freq_diff = freq_range->end_freq_khz - freq_range->start_freq_khz; if (freq_range->max_bandwidth_khz > freq_diff) @@ -575,7 +595,7 @@ static int reg_rules_intersect( power_rule->max_antenna_gain = min(power_rule1->max_antenna_gain, power_rule2->max_antenna_gain); - intersected_rule->flags = (rule1->flags | rule2->flags); + intersected_rule->flags = rule1->flags | rule2->flags; if (!is_valid_reg_rule(intersected_rule)) return -EINVAL; @@ -596,9 +616,9 @@ static int reg_rules_intersect( * resulting intersection of rules between rd1 and rd2. We will * kzalloc() this structure for you. */ -static struct ieee80211_regdomain *regdom_intersect( - const struct ieee80211_regdomain *rd1, - const struct ieee80211_regdomain *rd2) +static struct ieee80211_regdomain * +regdom_intersect(const struct ieee80211_regdomain *rd1, + const struct ieee80211_regdomain *rd2) { int r, size_of_regd; unsigned int x, y; @@ -607,12 +627,7 @@ static struct ieee80211_regdomain *regdom_intersect( struct ieee80211_reg_rule *intersected_rule; struct ieee80211_regdomain *rd; /* This is just a dummy holder to help us count */ - struct ieee80211_reg_rule irule; - - /* Uses the stack temporarily for counter arithmetic */ - intersected_rule = &irule; - - memset(intersected_rule, 0, sizeof(struct ieee80211_reg_rule)); + struct ieee80211_reg_rule dummy_rule; if (!rd1 || !rd2) return NULL; @@ -629,11 +644,8 @@ static struct ieee80211_regdomain *regdom_intersect( rule1 = &rd1->reg_rules[x]; for (y = 0; y < rd2->n_reg_rules; y++) { rule2 = &rd2->reg_rules[y]; - if (!reg_rules_intersect(rule1, rule2, - intersected_rule)) + if (!reg_rules_intersect(rule1, rule2, &dummy_rule)) num_rules++; - memset(intersected_rule, 0, - sizeof(struct ieee80211_reg_rule)); } } @@ -641,15 +653,15 @@ static struct ieee80211_regdomain *regdom_intersect( return NULL; size_of_regd = sizeof(struct ieee80211_regdomain) + - ((num_rules + 1) * sizeof(struct ieee80211_reg_rule)); + num_rules * sizeof(struct ieee80211_reg_rule); rd = kzalloc(size_of_regd, GFP_KERNEL); if (!rd) return NULL; - for (x = 0; x < rd1->n_reg_rules; x++) { + for (x = 0; x < rd1->n_reg_rules && rule_idx < num_rules; x++) { rule1 = &rd1->reg_rules[x]; - for (y = 0; y < rd2->n_reg_rules; y++) { + for (y = 0; y < rd2->n_reg_rules && rule_idx < num_rules; y++) { rule2 = &rd2->reg_rules[y]; /* * This time around instead of using the stack lets @@ -657,8 +669,7 @@ static struct ieee80211_regdomain *regdom_intersect( * a memcpy() */ intersected_rule = &rd->reg_rules[rule_idx]; - r = reg_rules_intersect(rule1, rule2, - intersected_rule); + r = reg_rules_intersect(rule1, rule2, intersected_rule); /* * No need to memset here the intersected rule here as * we're not using the stack anymore @@ -699,34 +710,16 @@ static u32 map_regdom_flags(u32 rd_flags) return channel_flags; } -static int freq_reg_info_regd(struct wiphy *wiphy, - u32 center_freq, - u32 desired_bw_khz, - const struct ieee80211_reg_rule **reg_rule, - const struct ieee80211_regdomain *custom_regd) +static const struct ieee80211_reg_rule * +freq_reg_info_regd(struct wiphy *wiphy, u32 center_freq, + const struct ieee80211_regdomain *regd) { int i; bool band_rule_found = false; - const struct ieee80211_regdomain *regd; bool bw_fits = false; - if (!desired_bw_khz) - desired_bw_khz = MHZ_TO_KHZ(20); - - regd = custom_regd ? custom_regd : cfg80211_regdomain; - - /* - * Follow the driver's regulatory domain, if present, unless a country - * IE has been processed or a user wants to help complaince further - */ - 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; - if (!regd) - return -EINVAL; + return ERR_PTR(-EINVAL); for (i = 0; i < regd->n_reg_rules; i++) { const struct ieee80211_reg_rule *rr; @@ -743,33 +736,36 @@ static int freq_reg_info_regd(struct wiphy *wiphy, if (!band_rule_found) band_rule_found = freq_in_rule_band(fr, center_freq); - bw_fits = reg_does_bw_fit(fr, - center_freq, - desired_bw_khz); + bw_fits = reg_does_bw_fit(fr, center_freq, MHZ_TO_KHZ(20)); - if (band_rule_found && bw_fits) { - *reg_rule = rr; - return 0; - } + if (band_rule_found && bw_fits) + return rr; } if (!band_rule_found) - return -ERANGE; + return ERR_PTR(-ERANGE); - return -EINVAL; + return ERR_PTR(-EINVAL); } -int freq_reg_info(struct wiphy *wiphy, - u32 center_freq, - u32 desired_bw_khz, - const struct ieee80211_reg_rule **reg_rule) +const struct ieee80211_reg_rule *freq_reg_info(struct wiphy *wiphy, + u32 center_freq) { - assert_cfg80211_lock(); - return freq_reg_info_regd(wiphy, - center_freq, - desired_bw_khz, - reg_rule, - NULL); + const struct ieee80211_regdomain *regd; + struct regulatory_request *lr = get_last_request(); + + /* + * Follow the driver's regulatory domain, if present, unless a country + * IE has been processed or a user wants to help complaince further + */ + if (lr->initiator != NL80211_REGDOM_SET_BY_COUNTRY_IE && + lr->initiator != NL80211_REGDOM_SET_BY_USER && + wiphy->regd) + regd = get_wiphy_regdom(wiphy); + else + regd = get_cfg80211_regdom(); + + return freq_reg_info_regd(wiphy, center_freq, regd); } EXPORT_SYMBOL(freq_reg_info); @@ -792,7 +788,6 @@ static const char *reg_initiator_name(enum nl80211_reg_initiator initiator) } 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; @@ -807,21 +802,16 @@ static void chan_reg_rule_print_dbg(struct ieee80211_channel *chan, 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("Updating information on frequency %d MHz with regulatory rule:\n", + chan->center_freq); REG_DBG_PRINT("%d KHz - %d KHz @ %d KHz), (%s mBi, %d mBm)\n", - freq_range->start_freq_khz, - freq_range->end_freq_khz, - freq_range->max_bandwidth_khz, - max_antenna_gain, + freq_range->start_freq_khz, freq_range->end_freq_khz, + freq_range->max_bandwidth_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; @@ -831,43 +821,25 @@ static void chan_reg_rule_print_dbg(struct ieee80211_channel *chan, /* * Note that right now we assume the desired channel bandwidth * is always 20 MHz for each individual channel (HT40 uses 20 MHz - * per channel, the primary and the extension channel). To support - * smaller custom bandwidths such as 5 MHz or 10 MHz we'll need a - * new ieee80211_channel.target_bw and re run the regulatory check - * on the wiphy with the target_bw specified. Then we can simply use - * that below for the desired_bw_khz below. + * per channel, the primary and the extension channel). */ static void handle_channel(struct wiphy *wiphy, enum nl80211_reg_initiator initiator, - enum ieee80211_band band, - unsigned int chan_idx) + struct ieee80211_channel *chan) { - int r; u32 flags, bw_flags = 0; - u32 desired_bw_khz = MHZ_TO_KHZ(20); const struct ieee80211_reg_rule *reg_rule = NULL; const struct ieee80211_power_rule *power_rule = NULL; const struct ieee80211_freq_range *freq_range = NULL; - struct ieee80211_supported_band *sband; - struct ieee80211_channel *chan; struct wiphy *request_wiphy = NULL; + struct regulatory_request *lr = get_last_request(); - assert_cfg80211_lock(); - - request_wiphy = wiphy_idx_to_wiphy(last_request->wiphy_idx); - - sband = wiphy->bands[band]; - BUG_ON(chan_idx >= sband->n_channels); - chan = &sband->channels[chan_idx]; + request_wiphy = wiphy_idx_to_wiphy(lr->wiphy_idx); flags = chan->orig_flags; - r = freq_reg_info(wiphy, - MHZ_TO_KHZ(chan->center_freq), - desired_bw_khz, - ®_rule); - - if (r) { + reg_rule = freq_reg_info(wiphy, MHZ_TO_KHZ(chan->center_freq)); + if (IS_ERR(reg_rule)) { /* * We will disable all channels that do not match our * received regulatory rule unless the hint is coming @@ -879,7 +851,7 @@ static void handle_channel(struct wiphy *wiphy, * while 5 GHz is still supported. */ if (initiator == NL80211_REGDOM_SET_BY_COUNTRY_IE && - r == -ERANGE) + PTR_ERR(reg_rule) == -ERANGE) return; REG_DBG_PRINT("Disabling freq %d MHz\n", chan->center_freq); @@ -887,15 +859,19 @@ static void handle_channel(struct wiphy *wiphy, return; } - chan_reg_rule_print_dbg(chan, desired_bw_khz, reg_rule); + chan_reg_rule_print_dbg(chan, reg_rule); power_rule = ®_rule->power_rule; freq_range = ®_rule->freq_range; if (freq_range->max_bandwidth_khz < MHZ_TO_KHZ(40)) bw_flags = IEEE80211_CHAN_NO_HT40; + if (freq_range->max_bandwidth_khz < MHZ_TO_KHZ(80)) + bw_flags |= IEEE80211_CHAN_NO_80MHZ; + if (freq_range->max_bandwidth_khz < MHZ_TO_KHZ(160)) + bw_flags |= IEEE80211_CHAN_NO_160MHZ; - if (last_request->initiator == NL80211_REGDOM_SET_BY_DRIVER && + if (lr->initiator == NL80211_REGDOM_SET_BY_DRIVER && request_wiphy && request_wiphy == wiphy && request_wiphy->flags & WIPHY_FLAG_STRICT_REGULATORY) { /* @@ -912,10 +888,14 @@ static void handle_channel(struct wiphy *wiphy, return; } + chan->dfs_state = NL80211_DFS_USABLE; + chan->dfs_state_entered = jiffies; + chan->beacon_found = false; chan->flags = flags | bw_flags | map_regdom_flags(reg_rule->flags); - chan->max_antenna_gain = min(chan->orig_mag, - (int) MBI_TO_DBI(power_rule->max_antenna_gain)); + chan->max_antenna_gain = + min_t(int, chan->orig_mag, + MBI_TO_DBI(power_rule->max_antenna_gain)); chan->max_reg_power = (int) MBM_TO_DBM(power_rule->max_eirp); if (chan->orig_mpwr) { /* @@ -935,68 +915,65 @@ static void handle_channel(struct wiphy *wiphy, } static void handle_band(struct wiphy *wiphy, - enum ieee80211_band band, - enum nl80211_reg_initiator initiator) + enum nl80211_reg_initiator initiator, + struct ieee80211_supported_band *sband) { unsigned int i; - struct ieee80211_supported_band *sband; - BUG_ON(!wiphy->bands[band]); - sband = wiphy->bands[band]; + if (!sband) + return; for (i = 0; i < sband->n_channels; i++) - handle_channel(wiphy, initiator, band, i); + handle_channel(wiphy, initiator, &sband->channels[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; + return request->user_reg_hint_type == NL80211_USER_REG_HINT_CELL_BASE; } bool reg_last_request_cell_base(void) { bool val; - assert_cfg80211_lock(); mutex_lock(®_mutex); - val = reg_request_cell_base(last_request); + val = reg_request_cell_base(get_last_request()); mutex_unlock(®_mutex); + return val; } #ifdef CONFIG_CFG80211_CERTIFICATION_ONUS - /* Core specific check */ -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) { + struct regulatory_request *lr = get_last_request(); + if (!reg_num_devs_support_basehint) - return -EOPNOTSUPP; + return REG_REQ_IGNORE; - if (reg_request_cell_base(last_request)) { - if (!regdom_changes(pending_request->alpha2)) - return -EALREADY; - return 0; - } - return 0; + if (reg_request_cell_base(lr) && + !regdom_changes(pending_request->alpha2)) + return REG_REQ_ALREADY_SET; + + return REG_REQ_OK; } /* 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; + return !(wiphy->features & NL80211_FEATURE_CELL_BASE_REG_HINTS); } #else static int reg_ignore_cell_hint(struct regulatory_request *pending_request) { - return -EOPNOTSUPP; + return REG_REQ_IGNORE; } -static int reg_dev_ignore_cell_hint(struct wiphy *wiphy) + +static bool reg_dev_ignore_cell_hint(struct wiphy *wiphy) { return true; } @@ -1006,18 +983,17 @@ static int reg_dev_ignore_cell_hint(struct wiphy *wiphy) static bool ignore_reg_update(struct wiphy *wiphy, enum nl80211_reg_initiator initiator) { - if (!last_request) { - REG_DBG_PRINT("Ignoring regulatory request %s since " - "last_request is not set\n", + struct regulatory_request *lr = get_last_request(); + + if (!lr) { + 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) { - REG_DBG_PRINT("Ignoring regulatory request %s " - "since the driver uses its own custom " - "regulatory domain\n", + REG_DBG_PRINT("Ignoring regulatory request %s since the driver uses its own custom regulatory domain\n", reg_initiator_name(initiator)); return true; } @@ -1028,22 +1004,35 @@ static bool ignore_reg_update(struct wiphy *wiphy, */ if (wiphy->flags & WIPHY_FLAG_STRICT_REGULATORY && !wiphy->regd && 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 regulatory " - "domain to be set first\n", + !is_world_regdom(lr->alpha2)) { + REG_DBG_PRINT("Ignoring regulatory request %s since the driver requires its own regulatory domain to be set first\n", reg_initiator_name(initiator)); return true; } - if (reg_request_cell_base(last_request)) + if (reg_request_cell_base(lr)) return reg_dev_ignore_cell_hint(wiphy); return false; } -static void handle_reg_beacon(struct wiphy *wiphy, - unsigned int chan_idx, +static bool reg_is_world_roaming(struct wiphy *wiphy) +{ + const struct ieee80211_regdomain *cr = get_cfg80211_regdom(); + const struct ieee80211_regdomain *wr = get_wiphy_regdom(wiphy); + struct regulatory_request *lr = get_last_request(); + + if (is_world_regdom(cr->alpha2) || (wr && is_world_regdom(wr->alpha2))) + return true; + + if (lr && lr->initiator != NL80211_REGDOM_SET_BY_COUNTRY_IE && + wiphy->flags & WIPHY_FLAG_CUSTOM_REGULATORY) + return true; + + return false; +} + +static void handle_reg_beacon(struct wiphy *wiphy, unsigned int chan_idx, struct reg_beacon *reg_beacon) { struct ieee80211_supported_band *sband; @@ -1051,8 +1040,6 @@ static void handle_reg_beacon(struct wiphy *wiphy, bool channel_changed = false; struct ieee80211_channel chan_before; - assert_cfg80211_lock(); - sband = wiphy->bands[reg_beacon->chan.band]; chan = &sband->channels[chan_idx]; @@ -1064,6 +1051,9 @@ static void handle_reg_beacon(struct wiphy *wiphy, chan->beacon_found = true; + if (!reg_is_world_roaming(wiphy)) + return; + if (wiphy->flags & WIPHY_FLAG_DISABLE_BEACON_HINTS) return; @@ -1094,8 +1084,6 @@ static void wiphy_update_new_beacon(struct wiphy *wiphy, unsigned int i; struct ieee80211_supported_band *sband; - assert_cfg80211_lock(); - if (!wiphy->bands[reg_beacon->chan.band]) return; @@ -1114,11 +1102,6 @@ static void wiphy_update_beacon_reg(struct wiphy *wiphy) struct ieee80211_supported_band *sband; struct reg_beacon *reg_beacon; - assert_cfg80211_lock(); - - if (list_empty(®_beacon_list)) - return; - list_for_each_entry(reg_beacon, ®_beacon_list, list) { if (!wiphy->bands[reg_beacon->chan.band]) continue; @@ -1128,18 +1111,6 @@ static void wiphy_update_beacon_reg(struct wiphy *wiphy) } } -static bool reg_is_world_roaming(struct wiphy *wiphy) -{ - if (is_world_regdom(cfg80211_regdomain->alpha2) || - (wiphy->regd && is_world_regdom(wiphy->regd->alpha2))) - return true; - if (last_request && - last_request->initiator != NL80211_REGDOM_SET_BY_COUNTRY_IE && - wiphy->flags & WIPHY_FLAG_CUSTOM_REGULATORY) - return true; - return false; -} - /* Reap the advantages of previously found beacons */ static void reg_process_beacons(struct wiphy *wiphy) { @@ -1149,39 +1120,29 @@ static void reg_process_beacons(struct wiphy *wiphy) */ if (!last_request) return; - if (!reg_is_world_roaming(wiphy)) - return; wiphy_update_beacon_reg(wiphy); } -static bool is_ht40_not_allowed(struct ieee80211_channel *chan) +static bool is_ht40_allowed(struct ieee80211_channel *chan) { if (!chan) - return true; + return false; if (chan->flags & IEEE80211_CHAN_DISABLED) - return true; + return false; /* This would happen when regulatory rules disallow HT40 completely */ - if (IEEE80211_CHAN_NO_HT40 == (chan->flags & (IEEE80211_CHAN_NO_HT40))) - return true; - return false; + if ((chan->flags & IEEE80211_CHAN_NO_HT40) == IEEE80211_CHAN_NO_HT40) + return false; + return true; } static void reg_process_ht_flags_channel(struct wiphy *wiphy, - enum ieee80211_band band, - unsigned int chan_idx) + struct ieee80211_channel *channel) { - struct ieee80211_supported_band *sband; - struct ieee80211_channel *channel; + struct ieee80211_supported_band *sband = wiphy->bands[channel->band]; struct ieee80211_channel *channel_before = NULL, *channel_after = NULL; unsigned int i; - assert_cfg80211_lock(); - - sband = wiphy->bands[band]; - BUG_ON(chan_idx >= sband->n_channels); - channel = &sband->channels[chan_idx]; - - if (is_ht40_not_allowed(channel)) { + if (!is_ht40_allowed(channel)) { channel->flags |= IEEE80211_CHAN_NO_HT40; return; } @@ -1192,6 +1153,7 @@ static void reg_process_ht_flags_channel(struct wiphy *wiphy, */ for (i = 0; i < sband->n_channels; i++) { struct ieee80211_channel *c = &sband->channels[i]; + if (c->center_freq == (channel->center_freq - 20)) channel_before = c; if (c->center_freq == (channel->center_freq + 20)) @@ -1203,28 +1165,27 @@ static void reg_process_ht_flags_channel(struct wiphy *wiphy, * if that ever changes we also need to change the below logic * to include that as well. */ - if (is_ht40_not_allowed(channel_before)) + if (!is_ht40_allowed(channel_before)) channel->flags |= IEEE80211_CHAN_NO_HT40MINUS; else channel->flags &= ~IEEE80211_CHAN_NO_HT40MINUS; - if (is_ht40_not_allowed(channel_after)) + if (!is_ht40_allowed(channel_after)) channel->flags |= IEEE80211_CHAN_NO_HT40PLUS; else channel->flags &= ~IEEE80211_CHAN_NO_HT40PLUS; } static void reg_process_ht_flags_band(struct wiphy *wiphy, - enum ieee80211_band band) + struct ieee80211_supported_band *sband) { unsigned int i; - struct ieee80211_supported_band *sband; - BUG_ON(!wiphy->bands[band]); - sband = wiphy->bands[band]; + if (!sband) + return; for (i = 0; i < sband->n_channels; i++) - reg_process_ht_flags_channel(wiphy, band, i); + reg_process_ht_flags_channel(wiphy, &sband->channels[i]); } static void reg_process_ht_flags(struct wiphy *wiphy) @@ -1234,34 +1195,29 @@ static void reg_process_ht_flags(struct wiphy *wiphy) if (!wiphy) return; - for (band = 0; band < IEEE80211_NUM_BANDS; band++) { - if (wiphy->bands[band]) - reg_process_ht_flags_band(wiphy, band); - } - + for (band = 0; band < IEEE80211_NUM_BANDS; band++) + reg_process_ht_flags_band(wiphy, wiphy->bands[band]); } static void wiphy_update_regulatory(struct wiphy *wiphy, enum nl80211_reg_initiator initiator) { enum ieee80211_band band; - - assert_reg_lock(); + struct regulatory_request *lr = get_last_request(); if (ignore_reg_update(wiphy, initiator)) return; - last_request->dfs_region = cfg80211_regdomain->dfs_region; + lr->dfs_region = get_cfg80211_regdom()->dfs_region; - for (band = 0; band < IEEE80211_NUM_BANDS; band++) { - if (wiphy->bands[band]) - handle_band(wiphy, band, initiator); - } + for (band = 0; band < IEEE80211_NUM_BANDS; band++) + handle_band(wiphy, initiator, wiphy->bands[band]); reg_process_beacons(wiphy); reg_process_ht_flags(wiphy); + if (wiphy->reg_notifier) - wiphy->reg_notifier(wiphy, last_request); + wiphy->reg_notifier(wiphy, lr); } static void update_all_wiphy_regulatory(enum nl80211_reg_initiator initiator) @@ -1269,6 +1225,8 @@ static void update_all_wiphy_regulatory(enum nl80211_reg_initiator initiator) struct cfg80211_registered_device *rdev; struct wiphy *wiphy; + assert_cfg80211_lock(); + list_for_each_entry(rdev, &cfg80211_rdev_list, list) { wiphy = &rdev->wiphy; wiphy_update_regulatory(wiphy, initiator); @@ -1280,53 +1238,40 @@ static void update_all_wiphy_regulatory(enum nl80211_reg_initiator initiator) if (initiator == NL80211_REGDOM_SET_BY_CORE && wiphy->flags & WIPHY_FLAG_CUSTOM_REGULATORY && wiphy->reg_notifier) - wiphy->reg_notifier(wiphy, last_request); + wiphy->reg_notifier(wiphy, get_last_request()); } } static void handle_channel_custom(struct wiphy *wiphy, - enum ieee80211_band band, - unsigned int chan_idx, + struct ieee80211_channel *chan, const struct ieee80211_regdomain *regd) { - int r; - u32 desired_bw_khz = MHZ_TO_KHZ(20); u32 bw_flags = 0; const struct ieee80211_reg_rule *reg_rule = NULL; const struct ieee80211_power_rule *power_rule = NULL; const struct ieee80211_freq_range *freq_range = NULL; - struct ieee80211_supported_band *sband; - struct ieee80211_channel *chan; - - assert_reg_lock(); - - sband = wiphy->bands[band]; - BUG_ON(chan_idx >= sband->n_channels); - chan = &sband->channels[chan_idx]; - r = freq_reg_info_regd(wiphy, - MHZ_TO_KHZ(chan->center_freq), - desired_bw_khz, - ®_rule, - regd); + reg_rule = freq_reg_info_regd(wiphy, MHZ_TO_KHZ(chan->center_freq), + 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)); + if (IS_ERR(reg_rule)) { + REG_DBG_PRINT("Disabling freq %d MHz as custom regd has no rule that fits it\n", + chan->center_freq); chan->flags = IEEE80211_CHAN_DISABLED; return; } - chan_reg_rule_print_dbg(chan, desired_bw_khz, reg_rule); + chan_reg_rule_print_dbg(chan, reg_rule); power_rule = ®_rule->power_rule; freq_range = ®_rule->freq_range; if (freq_range->max_bandwidth_khz < MHZ_TO_KHZ(40)) bw_flags = IEEE80211_CHAN_NO_HT40; + if (freq_range->max_bandwidth_khz < MHZ_TO_KHZ(80)) + bw_flags |= IEEE80211_CHAN_NO_80MHZ; + if (freq_range->max_bandwidth_khz < MHZ_TO_KHZ(160)) + bw_flags |= IEEE80211_CHAN_NO_160MHZ; chan->flags |= map_regdom_flags(reg_rule->flags) | bw_flags; chan->max_antenna_gain = (int) MBI_TO_DBI(power_rule->max_antenna_gain); @@ -1334,17 +1279,17 @@ static void handle_channel_custom(struct wiphy *wiphy, (int) MBM_TO_DBM(power_rule->max_eirp); } -static void handle_band_custom(struct wiphy *wiphy, enum ieee80211_band band, +static void handle_band_custom(struct wiphy *wiphy, + struct ieee80211_supported_band *sband, const struct ieee80211_regdomain *regd) { unsigned int i; - struct ieee80211_supported_band *sband; - BUG_ON(!wiphy->bands[band]); - sband = wiphy->bands[band]; + if (!sband) + return; for (i = 0; i < sband->n_channels; i++) - handle_channel_custom(wiphy, band, i, regd); + handle_channel_custom(wiphy, &sband->channels[i], regd); } /* Used by drivers prior to wiphy registration */ @@ -1354,60 +1299,50 @@ void wiphy_apply_custom_regulatory(struct wiphy *wiphy, enum ieee80211_band band; unsigned int bands_set = 0; - mutex_lock(®_mutex); for (band = 0; band < IEEE80211_NUM_BANDS; band++) { if (!wiphy->bands[band]) continue; - handle_band_custom(wiphy, band, regd); + handle_band_custom(wiphy, wiphy->bands[band], regd); bands_set++; } - mutex_unlock(®_mutex); /* * no point in calling this if it won't have any effect - * on your device's supportd bands. + * on your device's supported bands. */ WARN_ON(!bands_set); } EXPORT_SYMBOL(wiphy_apply_custom_regulatory); -/* - * Return value which can be used by ignore_request() to indicate - * it has been determined we should intersect two regulatory domains - */ -#define REG_INTERSECT 1 - /* This has the logic which determines when a new request * should be ignored. */ -static int ignore_request(struct wiphy *wiphy, +static enum reg_request_treatment +get_reg_request_treatment(struct wiphy *wiphy, struct regulatory_request *pending_request) { struct wiphy *last_wiphy = NULL; - - assert_cfg80211_lock(); + struct regulatory_request *lr = get_last_request(); /* All initial requests are respected */ - if (!last_request) - return 0; + if (!lr) + return REG_REQ_OK; switch (pending_request->initiator) { case NL80211_REGDOM_SET_BY_CORE: - return 0; + return REG_REQ_OK; case NL80211_REGDOM_SET_BY_COUNTRY_IE: - - if (reg_request_cell_base(last_request)) { + if (reg_request_cell_base(lr)) { /* Trust a Cell base station over the AP's country IE */ if (regdom_changes(pending_request->alpha2)) - return -EOPNOTSUPP; - return -EALREADY; + return REG_REQ_IGNORE; + return REG_REQ_ALREADY_SET; } - last_wiphy = wiphy_idx_to_wiphy(last_request->wiphy_idx); + last_wiphy = wiphy_idx_to_wiphy(lr->wiphy_idx); if (unlikely(!is_an_alpha2(pending_request->alpha2))) return -EINVAL; - if (last_request->initiator == - NL80211_REGDOM_SET_BY_COUNTRY_IE) { + if (lr->initiator == NL80211_REGDOM_SET_BY_COUNTRY_IE) { if (last_wiphy != wiphy) { /* * Two cards with two APs claiming different @@ -1416,23 +1351,23 @@ static int ignore_request(struct wiphy *wiphy, * to be correct. Reject second one for now. */ if (regdom_changes(pending_request->alpha2)) - return -EOPNOTSUPP; - return -EALREADY; + return REG_REQ_IGNORE; + return REG_REQ_ALREADY_SET; } /* * Two consecutive Country IE hints on the same wiphy. * This should be picked up early by the driver/stack */ if (WARN_ON(regdom_changes(pending_request->alpha2))) - return 0; - return -EALREADY; + return REG_REQ_OK; + return REG_REQ_ALREADY_SET; } return 0; case NL80211_REGDOM_SET_BY_DRIVER: - if (last_request->initiator == NL80211_REGDOM_SET_BY_CORE) { + if (lr->initiator == NL80211_REGDOM_SET_BY_CORE) { if (regdom_changes(pending_request->alpha2)) - return 0; - return -EALREADY; + return REG_REQ_OK; + return REG_REQ_ALREADY_SET; } /* @@ -1440,59 +1375,59 @@ static int ignore_request(struct wiphy *wiphy, * back in or if you add a new device for which the previously * loaded card also agrees on the regulatory domain. */ - if (last_request->initiator == NL80211_REGDOM_SET_BY_DRIVER && + if (lr->initiator == NL80211_REGDOM_SET_BY_DRIVER && !regdom_changes(pending_request->alpha2)) - return -EALREADY; + return REG_REQ_ALREADY_SET; - return REG_INTERSECT; + return REG_REQ_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 (reg_request_cell_base(lr)) + return REG_REQ_IGNORE; - if (last_request->initiator == NL80211_REGDOM_SET_BY_COUNTRY_IE) - return REG_INTERSECT; + if (lr->initiator == NL80211_REGDOM_SET_BY_COUNTRY_IE) + return REG_REQ_INTERSECT; /* * If the user knows better the user should set the regdom * to their country before the IE is picked up */ - if (last_request->initiator == NL80211_REGDOM_SET_BY_USER && - last_request->intersect) - return -EOPNOTSUPP; + if (lr->initiator == NL80211_REGDOM_SET_BY_USER && + lr->intersect) + return REG_REQ_IGNORE; /* * Process user requests only after previous user/driver/core * requests have been processed */ - if (last_request->initiator == NL80211_REGDOM_SET_BY_CORE || - last_request->initiator == NL80211_REGDOM_SET_BY_DRIVER || - last_request->initiator == NL80211_REGDOM_SET_BY_USER) { - if (regdom_changes(last_request->alpha2)) - return -EAGAIN; - } + if ((lr->initiator == NL80211_REGDOM_SET_BY_CORE || + lr->initiator == NL80211_REGDOM_SET_BY_DRIVER || + lr->initiator == NL80211_REGDOM_SET_BY_USER) && + regdom_changes(lr->alpha2)) + return REG_REQ_IGNORE; if (!regdom_changes(pending_request->alpha2)) - return -EALREADY; + return REG_REQ_ALREADY_SET; - return 0; + return REG_REQ_OK; } - return -EINVAL; + return REG_REQ_IGNORE; } static void reg_set_request_processed(void) { bool need_more_processing = false; + struct regulatory_request *lr = get_last_request(); - last_request->processed = true; + lr->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) + if (lr->initiator == NL80211_REGDOM_SET_BY_USER) cancel_delayed_work(®_timeout); if (need_more_processing) @@ -1508,116 +1443,122 @@ static void reg_set_request_processed(void) * The Wireless subsystem can use this function to hint to the wireless core * what it believes should be the current regulatory domain. * - * Returns zero if all went fine, %-EALREADY if a regulatory domain had - * already been set or other standard error codes. + * Returns one of the different reg request treatment values. * - * Caller must hold &cfg80211_mutex and ®_mutex + * Caller must hold ®_mutex */ -static int __regulatory_hint(struct wiphy *wiphy, - struct regulatory_request *pending_request) +static enum reg_request_treatment +__regulatory_hint(struct wiphy *wiphy, + struct regulatory_request *pending_request) { + const struct ieee80211_regdomain *regd; bool intersect = false; - int r = 0; - - assert_cfg80211_lock(); + enum reg_request_treatment treatment; + struct regulatory_request *lr; - r = ignore_request(wiphy, pending_request); + treatment = get_reg_request_treatment(wiphy, pending_request); - if (r == REG_INTERSECT) { + switch (treatment) { + case REG_REQ_INTERSECT: if (pending_request->initiator == NL80211_REGDOM_SET_BY_DRIVER) { - r = reg_copy_regd(&wiphy->regd, cfg80211_regdomain); - if (r) { + regd = reg_copy_regd(get_cfg80211_regdom()); + if (IS_ERR(regd)) { kfree(pending_request); - return r; + return PTR_ERR(regd); } + rcu_assign_pointer(wiphy->regd, regd); } intersect = true; - } else if (r) { + break; + case REG_REQ_OK: + break; + default: /* * If the regulatory domain being requested by the * driver has already been set just copy it to the * wiphy */ - if (r == -EALREADY && - pending_request->initiator == - NL80211_REGDOM_SET_BY_DRIVER) { - r = reg_copy_regd(&wiphy->regd, cfg80211_regdomain); - if (r) { + if (treatment == REG_REQ_ALREADY_SET && + pending_request->initiator == NL80211_REGDOM_SET_BY_DRIVER) { + regd = reg_copy_regd(get_cfg80211_regdom()); + if (IS_ERR(regd)) { kfree(pending_request); - return r; + return REG_REQ_IGNORE; } - r = -EALREADY; + treatment = REG_REQ_ALREADY_SET; + rcu_assign_pointer(wiphy->regd, regd); goto new_request; } kfree(pending_request); - return r; + return treatment; } new_request: - if (last_request != &core_request_world) - kfree(last_request); + lr = get_last_request(); + if (lr != &core_request_world && lr) + kfree_rcu(lr, rcu_head); - last_request = pending_request; - last_request->intersect = intersect; + pending_request->intersect = intersect; + pending_request->processed = false; + rcu_assign_pointer(last_request, pending_request); + lr = pending_request; pending_request = NULL; - if (last_request->initiator == NL80211_REGDOM_SET_BY_USER) { - user_alpha2[0] = last_request->alpha2[0]; - user_alpha2[1] = last_request->alpha2[1]; + if (lr->initiator == NL80211_REGDOM_SET_BY_USER) { + user_alpha2[0] = lr->alpha2[0]; + user_alpha2[1] = lr->alpha2[1]; } - /* When r == REG_INTERSECT we do need to call CRDA */ - if (r < 0) { + /* When r == REG_REQ_INTERSECT we do need to call CRDA */ + if (treatment != REG_REQ_OK && treatment != REG_REQ_INTERSECT) { /* * Since CRDA will not be called in this case as we already * have applied the requested regulatory domain before we just * inform userspace we have processed the request */ - if (r == -EALREADY) { - nl80211_send_reg_change_event(last_request); + if (treatment == REG_REQ_ALREADY_SET) { + nl80211_send_reg_change_event(lr); reg_set_request_processed(); } - return r; + return treatment; } - return call_crda(last_request->alpha2); + if (call_crda(lr->alpha2)) + return REG_REQ_IGNORE; + return REG_REQ_OK; } /* This processes *all* regulatory hints */ static void reg_process_hint(struct regulatory_request *reg_request, enum nl80211_reg_initiator reg_initiator) { - int r = 0; struct wiphy *wiphy = NULL; - BUG_ON(!reg_request->alpha2); + if (WARN_ON(!reg_request->alpha2)) + return; - if (wiphy_idx_valid(reg_request->wiphy_idx)) + if (reg_request->wiphy_idx != WIPHY_IDX_INVALID) wiphy = wiphy_idx_to_wiphy(reg_request->wiphy_idx); - if (reg_initiator == NL80211_REGDOM_SET_BY_DRIVER && - !wiphy) { + if (reg_initiator == NL80211_REGDOM_SET_BY_DRIVER && !wiphy) { kfree(reg_request); 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_update_regulatory(wiphy, reg_initiator); - return; + switch (__regulatory_hint(wiphy, reg_request)) { + case REG_REQ_ALREADY_SET: + /* This is required so that the orig_* parameters are saved */ + if (wiphy && wiphy->flags & WIPHY_FLAG_STRICT_REGULATORY) + wiphy_update_regulatory(wiphy, reg_initiator); + break; + default: + if (reg_initiator == NL80211_REGDOM_SET_BY_USER) + schedule_delayed_work(®_timeout, + msecs_to_jiffies(3142)); + break; } - - /* - * We only time out user hints, given that they should be the only - * source of bogus requests. - */ - if (r != -EALREADY && - reg_initiator == NL80211_REGDOM_SET_BY_USER) - schedule_delayed_work(®_timeout, msecs_to_jiffies(3142)); } /* @@ -1627,15 +1568,15 @@ static void reg_process_hint(struct regulatory_request *reg_request, */ static void reg_process_pending_hints(void) { - struct regulatory_request *reg_request; + struct regulatory_request *reg_request, *lr; mutex_lock(&cfg80211_mutex); mutex_lock(®_mutex); + lr = get_last_request(); /* 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...\n"); + if (lr && !lr->processed) { + REG_DBG_PRINT("Pending regulatory request, waiting for it to be processed...\n"); goto out; } @@ -1666,23 +1607,14 @@ static void reg_process_pending_beacon_hints(void) struct cfg80211_registered_device *rdev; struct reg_beacon *pending_beacon, *tmp; - /* - * No need to hold the reg_mutex here as we just touch wiphys - * and do not read or access regulatory variables. - */ mutex_lock(&cfg80211_mutex); + mutex_lock(®_mutex); /* This goes through the _pending_ beacon list */ spin_lock_bh(®_pending_beacons_lock); - if (list_empty(®_pending_beacons)) { - spin_unlock_bh(®_pending_beacons_lock); - goto out; - } - list_for_each_entry_safe(pending_beacon, tmp, ®_pending_beacons, list) { - list_del_init(&pending_beacon->list); /* Applies the beacon hint to current wiphys */ @@ -1694,7 +1626,7 @@ static void reg_process_pending_beacon_hints(void) } spin_unlock_bh(®_pending_beacons_lock); -out: + mutex_unlock(®_mutex); mutex_unlock(&cfg80211_mutex); } @@ -1706,10 +1638,8 @@ static void reg_todo(struct work_struct *work) static void queue_regulatory_request(struct regulatory_request *request) { - if (isalpha(request->alpha2[0])) - request->alpha2[0] = toupper(request->alpha2[0]); - if (isalpha(request->alpha2[1])) - request->alpha2[1] = toupper(request->alpha2[1]); + request->alpha2[0] = toupper(request->alpha2[0]); + request->alpha2[1] = toupper(request->alpha2[1]); spin_lock(®_requests_lock); list_add_tail(&request->list, ®_requests_list); @@ -1726,8 +1656,7 @@ static int regulatory_hint_core(const char *alpha2) { struct regulatory_request *request; - request = kzalloc(sizeof(struct regulatory_request), - GFP_KERNEL); + request = kzalloc(sizeof(struct regulatory_request), GFP_KERNEL); if (!request) return -ENOMEM; @@ -1746,13 +1675,14 @@ int regulatory_hint_user(const char *alpha2, { struct regulatory_request *request; - BUG_ON(!alpha2); + if (WARN_ON(!alpha2)) + return -EINVAL; request = kzalloc(sizeof(struct regulatory_request), GFP_KERNEL); if (!request) return -ENOMEM; - request->wiphy_idx = WIPHY_IDX_STALE; + request->wiphy_idx = WIPHY_IDX_INVALID; request->alpha2[0] = alpha2[0]; request->alpha2[1] = alpha2[1]; request->initiator = NL80211_REGDOM_SET_BY_USER; @@ -1768,8 +1698,8 @@ int regulatory_hint(struct wiphy *wiphy, const char *alpha2) { struct regulatory_request *request; - BUG_ON(!alpha2); - BUG_ON(!wiphy); + if (WARN_ON(!alpha2 || !wiphy)) + return -EINVAL; request = kzalloc(sizeof(struct regulatory_request), GFP_KERNEL); if (!request) @@ -1777,9 +1707,6 @@ int regulatory_hint(struct wiphy *wiphy, const char *alpha2) request->wiphy_idx = get_wiphy_idx(wiphy); - /* Must have registered wiphy first */ - BUG_ON(!wiphy_idx_valid(request->wiphy_idx)); - request->alpha2[0] = alpha2[0]; request->alpha2[1] = alpha2[1]; request->initiator = NL80211_REGDOM_SET_BY_DRIVER; @@ -1794,18 +1721,17 @@ EXPORT_SYMBOL(regulatory_hint); * We hold wdev_lock() here so we cannot hold cfg80211_mutex() and * therefore cannot iterate over the rdev list here. */ -void regulatory_hint_11d(struct wiphy *wiphy, - enum ieee80211_band band, - const u8 *country_ie, - u8 country_ie_len) +void regulatory_hint_11d(struct wiphy *wiphy, enum ieee80211_band band, + const u8 *country_ie, u8 country_ie_len) { char alpha2[2]; enum environment_cap env = ENVIRON_ANY; - struct regulatory_request *request; + struct regulatory_request *request, *lr; mutex_lock(®_mutex); + lr = get_last_request(); - if (unlikely(!last_request)) + if (unlikely(!lr)) goto out; /* IE len must be evenly divisible by 2 */ @@ -1828,9 +1754,8 @@ void regulatory_hint_11d(struct wiphy *wiphy, * We leave conflict resolution to the workqueue, where can hold * cfg80211_mutex. */ - if (likely(last_request->initiator == - NL80211_REGDOM_SET_BY_COUNTRY_IE && - wiphy_idx_valid(last_request->wiphy_idx))) + if (lr->initiator == NL80211_REGDOM_SET_BY_COUNTRY_IE && + lr->wiphy_idx != WIPHY_IDX_INVALID) goto out; request = kzalloc(sizeof(struct regulatory_request), GFP_KERNEL); @@ -1843,12 +1768,7 @@ void regulatory_hint_11d(struct wiphy *wiphy, request->initiator = NL80211_REGDOM_SET_BY_COUNTRY_IE; request->country_ie_env = env; - mutex_unlock(®_mutex); - queue_regulatory_request(request); - - return; - out: mutex_unlock(®_mutex); } @@ -1863,8 +1783,7 @@ static void restore_alpha2(char *alpha2, bool reset_user) if (is_user_regdom_saved()) { /* Unless we're asked to ignore it and reset it */ if (reset_user) { - REG_DBG_PRINT("Restoring regulatory settings " - "including user preference\n"); + REG_DBG_PRINT("Restoring regulatory settings including user preference\n"); user_alpha2[0] = '9'; user_alpha2[1] = '7'; @@ -1874,26 +1793,20 @@ static void restore_alpha2(char *alpha2, bool reset_user) * back as they were for a full restore. */ if (!is_world_regdom(ieee80211_regdom)) { - REG_DBG_PRINT("Keeping preference on " - "module parameter ieee80211_regdom: %c%c\n", - ieee80211_regdom[0], - ieee80211_regdom[1]); + 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("Restoring regulatory settings " - "while preserving user preference for: %c%c\n", - user_alpha2[0], - user_alpha2[1]); + REG_DBG_PRINT("Restoring regulatory settings while preserving user preference for: %c%c\n", + user_alpha2[0], user_alpha2[1]); alpha2[0] = user_alpha2[0]; alpha2[1] = user_alpha2[1]; } } else if (!is_world_regdom(ieee80211_regdom)) { - REG_DBG_PRINT("Keeping preference on " - "module parameter ieee80211_regdom: %c%c\n", - ieee80211_regdom[0], - ieee80211_regdom[1]); + 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 @@ -1948,7 +1861,7 @@ static void restore_regulatory_settings(bool reset_user) mutex_lock(&cfg80211_mutex); mutex_lock(®_mutex); - reset_regdomains(true); + reset_regdomains(true, &world_regdom); restore_alpha2(alpha2, reset_user); /* @@ -1958,49 +1871,35 @@ static void restore_regulatory_settings(bool reset_user) * 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_move_tail(®_request->list, &tmp_reg_req_list); - } + list_for_each_entry_safe(reg_request, tmp, ®_requests_list, list) { + if (reg_request->initiator != NL80211_REGDOM_SET_BY_USER) + continue; + list_move_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)) { - list_for_each_entry_safe(reg_beacon, btmp, - ®_pending_beacons, list) { - list_del(®_beacon->list); - kfree(reg_beacon); - } + list_for_each_entry_safe(reg_beacon, btmp, ®_pending_beacons, list) { + list_del(®_beacon->list); + kfree(reg_beacon); } spin_unlock_bh(®_pending_beacons_lock); - if (!list_empty(®_beacon_list)) { - list_for_each_entry_safe(reg_beacon, btmp, - ®_beacon_list, list) { - list_del(®_beacon->list); - kfree(reg_beacon); - } + list_for_each_entry_safe(reg_beacon, btmp, ®_beacon_list, list) { + list_del(®_beacon->list); + kfree(reg_beacon); } /* First restore to the basic regulatory settings */ - cfg80211_regdomain = cfg80211_world_regdom; - world_alpha2[0] = cfg80211_regdomain->alpha2[0]; - world_alpha2[1] = cfg80211_regdomain->alpha2[1]; + world_alpha2[0] = cfg80211_world_regdom->alpha2[0]; + world_alpha2[1] = cfg80211_world_regdom->alpha2[1]; list_for_each_entry(rdev, &cfg80211_rdev_list, list) { if (rdev->wiphy.flags & WIPHY_FLAG_CUSTOM_REGULATORY) restore_custom_reg_settings(&rdev->wiphy); } - mutex_unlock(®_mutex); - mutex_unlock(&cfg80211_mutex); - regulatory_hint_core(world_alpha2); /* @@ -2011,20 +1910,8 @@ static void restore_regulatory_settings(bool reset_user) if (is_an_alpha2(alpha2)) regulatory_hint_user(user_alpha2, NL80211_USER_REG_HINT_USER); - 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_move_tail(®_request->list, ®_requests_list); - } + list_splice_tail_init(&tmp_reg_req_list, ®_requests_list); spin_unlock(®_requests_lock); mutex_unlock(®_mutex); @@ -2037,8 +1924,7 @@ static void restore_regulatory_settings(bool reset_user) void regulatory_hint_disconnect(void) { - REG_DBG_PRINT("All devices are disconnected, going to " - "restore regulatory settings\n"); + REG_DBG_PRINT("All devices are disconnected, going to restore regulatory settings\n"); restore_regulatory_settings(false); } @@ -2051,31 +1937,48 @@ static bool freq_is_chan_12_13_14(u16 freq) return false; } +static bool pending_reg_beacon(struct ieee80211_channel *beacon_chan) +{ + struct reg_beacon *pending_beacon; + + list_for_each_entry(pending_beacon, ®_pending_beacons, list) + if (beacon_chan->center_freq == + pending_beacon->chan.center_freq) + return true; + return false; +} + int regulatory_hint_found_beacon(struct wiphy *wiphy, struct ieee80211_channel *beacon_chan, gfp_t gfp) { struct reg_beacon *reg_beacon; + bool processing; - if (likely((beacon_chan->beacon_found || - (beacon_chan->flags & IEEE80211_CHAN_RADAR) || + if (beacon_chan->beacon_found || + beacon_chan->flags & IEEE80211_CHAN_RADAR || (beacon_chan->band == IEEE80211_BAND_2GHZ && - !freq_is_chan_12_13_14(beacon_chan->center_freq))))) + !freq_is_chan_12_13_14(beacon_chan->center_freq))) + return 0; + + spin_lock_bh(®_pending_beacons_lock); + processing = pending_reg_beacon(beacon_chan); + spin_unlock_bh(®_pending_beacons_lock); + + if (processing) return 0; reg_beacon = kzalloc(sizeof(struct reg_beacon), gfp); if (!reg_beacon) return -ENOMEM; - REG_DBG_PRINT("Found new beacon on " - "frequency: %d MHz (Ch %d) on %s\n", + 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), wiphy_name(wiphy)); memcpy(®_beacon->chan, beacon_chan, - sizeof(struct ieee80211_channel)); - + sizeof(struct ieee80211_channel)); /* * Since we can be called from BH or and non-BH context @@ -2155,21 +2058,19 @@ static void print_dfs_region(u8 dfs_region) pr_info(" DFS Master region JP"); break; default: - pr_info(" DFS Master region Uknown"); + pr_info(" DFS Master region Unknown"); break; } } static void print_regdomain(const struct ieee80211_regdomain *rd) { + struct regulatory_request *lr = get_last_request(); if (is_intersected_alpha2(rd->alpha2)) { - - if (last_request->initiator == - NL80211_REGDOM_SET_BY_COUNTRY_IE) { + if (lr->initiator == NL80211_REGDOM_SET_BY_COUNTRY_IE) { struct cfg80211_registered_device *rdev; - rdev = cfg80211_rdev_by_wiphy_idx( - last_request->wiphy_idx); + rdev = cfg80211_rdev_by_wiphy_idx(lr->wiphy_idx); if (rdev) { pr_info("Current regulatory domain updated by AP to: %c%c\n", rdev->country_ie_alpha2[0], @@ -2178,22 +2079,21 @@ static void print_regdomain(const struct ieee80211_regdomain *rd) pr_info("Current regulatory domain intersected:\n"); } else pr_info("Current regulatory domain intersected:\n"); - } else if (is_world_regdom(rd->alpha2)) + } else if (is_world_regdom(rd->alpha2)) { pr_info("World regulatory domain updated:\n"); - else { + } else { if (is_unknown_alpha2(rd->alpha2)) pr_info("Regulatory domain changed to driver built-in settings (unknown country)\n"); else { - if (reg_request_cell_base(last_request)) - pr_info("Regulatory domain changed " - "to country: %c%c by Cell Station\n", + if (reg_request_cell_base(lr)) + 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", + 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); } @@ -2207,22 +2107,23 @@ static void print_regdomain_info(const struct ieee80211_regdomain *rd) /* Takes ownership of rd only if it doesn't fail */ static int __set_regdom(const struct ieee80211_regdomain *rd) { + const struct ieee80211_regdomain *regd; const struct ieee80211_regdomain *intersected_rd = NULL; struct wiphy *request_wiphy; + struct regulatory_request *lr = get_last_request(); + /* Some basic sanity checks first */ + if (!reg_is_valid_request(rd->alpha2)) + return -EINVAL; + if (is_world_regdom(rd->alpha2)) { - if (WARN_ON(!reg_is_valid_request(rd->alpha2))) - return -EINVAL; update_world_regdomain(rd); return 0; } if (!is_alpha2_set(rd->alpha2) && !is_an_alpha2(rd->alpha2) && - !is_unknown_alpha2(rd->alpha2)) - return -EINVAL; - - if (!last_request) + !is_unknown_alpha2(rd->alpha2)) return -EINVAL; /* @@ -2230,7 +2131,7 @@ static int __set_regdom(const struct ieee80211_regdomain *rd) * rd is non static (it means CRDA was present and was used last) * and the pending request came in from a country IE */ - if (last_request->initiator != NL80211_REGDOM_SET_BY_COUNTRY_IE) { + if (lr->initiator != NL80211_REGDOM_SET_BY_COUNTRY_IE) { /* * If someone else asked us to change the rd lets only bother * checking if the alpha2 changes if CRDA was already called @@ -2246,29 +2147,23 @@ static int __set_regdom(const struct ieee80211_regdomain *rd) * internal EEPROM data */ - if (WARN_ON(!reg_is_valid_request(rd->alpha2))) - return -EINVAL; - if (!is_valid_rd(rd)) { pr_err("Invalid regulatory domain detected:\n"); print_regdomain_info(rd); return -EINVAL; } - request_wiphy = wiphy_idx_to_wiphy(last_request->wiphy_idx); + request_wiphy = wiphy_idx_to_wiphy(lr->wiphy_idx); if (!request_wiphy && - (last_request->initiator == NL80211_REGDOM_SET_BY_DRIVER || - last_request->initiator == NL80211_REGDOM_SET_BY_COUNTRY_IE)) { + (lr->initiator == NL80211_REGDOM_SET_BY_DRIVER || + lr->initiator == NL80211_REGDOM_SET_BY_COUNTRY_IE)) { schedule_delayed_work(®_timeout, 0); return -ENODEV; } - if (!last_request->intersect) { - int r; - - if (last_request->initiator != NL80211_REGDOM_SET_BY_DRIVER) { - reset_regdomains(false); - cfg80211_regdomain = rd; + if (!lr->intersect) { + if (lr->initiator != NL80211_REGDOM_SET_BY_DRIVER) { + reset_regdomains(false, rd); return 0; } @@ -2284,20 +2179,19 @@ static int __set_regdom(const struct ieee80211_regdomain *rd) if (request_wiphy->regd) return -EALREADY; - r = reg_copy_regd(&request_wiphy->regd, rd); - if (r) - return r; + regd = reg_copy_regd(rd); + if (IS_ERR(regd)) + return PTR_ERR(regd); - reset_regdomains(false); - cfg80211_regdomain = rd; + rcu_assign_pointer(request_wiphy->regd, regd); + reset_regdomains(false, rd); return 0; } /* Intersection requires a bit more work */ - if (last_request->initiator != NL80211_REGDOM_SET_BY_COUNTRY_IE) { - - intersected_rd = regdom_intersect(rd, cfg80211_regdomain); + if (lr->initiator != NL80211_REGDOM_SET_BY_COUNTRY_IE) { + intersected_rd = regdom_intersect(rd, get_cfg80211_regdom()); if (!intersected_rd) return -EINVAL; @@ -2306,15 +2200,19 @@ static int __set_regdom(const struct ieee80211_regdomain *rd) * However if a driver requested this specific regulatory * domain we keep it for its private use */ - if (last_request->initiator == NL80211_REGDOM_SET_BY_DRIVER) - request_wiphy->regd = rd; - else + if (lr->initiator == NL80211_REGDOM_SET_BY_DRIVER) { + const struct ieee80211_regdomain *tmp; + + tmp = get_wiphy_regdom(request_wiphy); + rcu_assign_pointer(request_wiphy->regd, rd); + rcu_free_regdom(tmp); + } else { kfree(rd); + } rd = NULL; - reset_regdomains(false); - cfg80211_regdomain = intersected_rd; + reset_regdomains(false, intersected_rd); return 0; } @@ -2326,15 +2224,15 @@ static int __set_regdom(const struct ieee80211_regdomain *rd) /* * Use this call to set the current regulatory domain. Conflicts with * multiple drivers can be ironed out later. Caller must've already - * kmalloc'd the rd structure. Caller must hold cfg80211_mutex + * kmalloc'd the rd structure. */ int set_regdom(const struct ieee80211_regdomain *rd) { + struct regulatory_request *lr; int r; - assert_cfg80211_lock(); - mutex_lock(®_mutex); + lr = get_last_request(); /* Note that this doesn't update the wiphys, this is done below */ r = __set_regdom(rd); @@ -2343,23 +2241,25 @@ int set_regdom(const struct ieee80211_regdomain *rd) reg_set_request_processed(); kfree(rd); - mutex_unlock(®_mutex); - return r; + goto out; } /* This would make this whole thing pointless */ - if (!last_request->intersect) - BUG_ON(rd != cfg80211_regdomain); + if (WARN_ON(!lr->intersect && rd != get_cfg80211_regdom())) { + r = -EINVAL; + goto out; + } /* update all wiphys now with the new established regulatory domain */ - update_all_wiphy_regulatory(last_request->initiator); + update_all_wiphy_regulatory(lr->initiator); - print_regdomain(cfg80211_regdomain); + print_regdomain(get_cfg80211_regdom()); - nl80211_send_reg_change_event(last_request); + nl80211_send_reg_change_event(lr); reg_set_request_processed(); + out: mutex_unlock(®_mutex); return r; @@ -2367,20 +2267,26 @@ int set_regdom(const struct ieee80211_regdomain *rd) 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; + struct regulatory_request *lr; + u8 alpha2[2]; + bool add = false; + + rcu_read_lock(); + lr = get_last_request(); + if (lr && !lr->processed) { + memcpy(alpha2, lr->alpha2, 2); + add = true; } + rcu_read_unlock(); + if (add) + return add_uevent_var(env, "COUNTRY=%c%c", + alpha2[0], alpha2[1]); return 0; } void wiphy_regulatory_register(struct wiphy *wiphy) { - assert_cfg80211_lock(); - mutex_lock(®_mutex); if (!reg_dev_ignore_cell_hint(wiphy)) @@ -2395,32 +2301,32 @@ void wiphy_regulatory_register(struct wiphy *wiphy) void wiphy_regulatory_deregister(struct wiphy *wiphy) { struct wiphy *request_wiphy = NULL; - - assert_cfg80211_lock(); + struct regulatory_request *lr; mutex_lock(®_mutex); + lr = get_last_request(); if (!reg_dev_ignore_cell_hint(wiphy)) reg_num_devs_support_basehint--; - kfree(wiphy->regd); + rcu_free_regdom(get_wiphy_regdom(wiphy)); + rcu_assign_pointer(wiphy->regd, NULL); - if (last_request) - request_wiphy = wiphy_idx_to_wiphy(last_request->wiphy_idx); + if (lr) + request_wiphy = wiphy_idx_to_wiphy(lr->wiphy_idx); if (!request_wiphy || request_wiphy != wiphy) goto out; - last_request->wiphy_idx = WIPHY_IDX_STALE; - last_request->country_ie_env = ENVIRON_ANY; + lr->wiphy_idx = WIPHY_IDX_INVALID; + lr->country_ie_env = ENVIRON_ANY; out: 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\n"); + REG_DBG_PRINT("Timeout while waiting for CRDA to reply, restoring regulatory settings\n"); restore_regulatory_settings(true); } @@ -2439,13 +2345,13 @@ int __init regulatory_init(void) reg_regdb_size_check(); - cfg80211_regdomain = cfg80211_world_regdom; + rcu_assign_pointer(cfg80211_regdomain, cfg80211_world_regdom); user_alpha2[0] = '9'; user_alpha2[1] = '7'; /* We always try to get an update for the static regdomain */ - err = regulatory_hint_core(cfg80211_regdomain->alpha2); + err = regulatory_hint_core(cfg80211_world_regdom->alpha2); if (err) { if (err == -ENOMEM) return err; @@ -2457,10 +2363,6 @@ int __init regulatory_init(void) * errors as non-fatal. */ 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); -#endif } /* @@ -2474,7 +2376,7 @@ int __init regulatory_init(void) return 0; } -void /* __init_or_exit */ regulatory_exit(void) +void regulatory_exit(void) { struct regulatory_request *reg_request, *tmp; struct reg_beacon *reg_beacon, *btmp; @@ -2482,43 +2384,27 @@ void /* __init_or_exit */ regulatory_exit(void) cancel_work_sync(®_work); cancel_delayed_work_sync(®_timeout); - mutex_lock(&cfg80211_mutex); + /* Lock to suppress warnings */ mutex_lock(®_mutex); - - reset_regdomains(true); + reset_regdomains(true, NULL); + mutex_unlock(®_mutex); dev_set_uevent_suppress(®_pdev->dev, true); platform_device_unregister(reg_pdev); - spin_lock_bh(®_pending_beacons_lock); - if (!list_empty(®_pending_beacons)) { - list_for_each_entry_safe(reg_beacon, btmp, - ®_pending_beacons, list) { - list_del(®_beacon->list); - kfree(reg_beacon); - } + list_for_each_entry_safe(reg_beacon, btmp, ®_pending_beacons, list) { + list_del(®_beacon->list); + kfree(reg_beacon); } - spin_unlock_bh(®_pending_beacons_lock); - if (!list_empty(®_beacon_list)) { - list_for_each_entry_safe(reg_beacon, btmp, - ®_beacon_list, list) { - list_del(®_beacon->list); - kfree(reg_beacon); - } + list_for_each_entry_safe(reg_beacon, btmp, ®_beacon_list, list) { + list_del(®_beacon->list); + kfree(reg_beacon); } - spin_lock(®_requests_lock); - if (!list_empty(®_requests_list)) { - list_for_each_entry_safe(reg_request, tmp, - ®_requests_list, list) { - list_del(®_request->list); - kfree(reg_request); - } + list_for_each_entry_safe(reg_request, tmp, ®_requests_list, list) { + list_del(®_request->list); + kfree(reg_request); } - spin_unlock(®_requests_lock); - - mutex_unlock(®_mutex); - mutex_unlock(&cfg80211_mutex); } |