diff options
Diffstat (limited to 'net/wireless/reg.c')
| -rw-r--r-- | net/wireless/reg.c | 841 |
1 files changed, 513 insertions, 328 deletions
diff --git a/net/wireless/reg.c b/net/wireless/reg.c index 7da67fd0b418..f0541370e68e 100644 --- a/net/wireless/reg.c +++ b/net/wireless/reg.c @@ -120,6 +120,48 @@ static const struct ieee80211_regdomain *get_wiphy_regdom(struct wiphy *wiphy) return rtnl_dereference(wiphy->regd); } +static const char *reg_dfs_region_str(enum nl80211_dfs_regions dfs_region) +{ + switch (dfs_region) { + case NL80211_DFS_UNSET: + return "unset"; + case NL80211_DFS_FCC: + return "FCC"; + case NL80211_DFS_ETSI: + return "ETSI"; + case NL80211_DFS_JP: + return "JP"; + } + return "Unknown"; +} + +enum nl80211_dfs_regions reg_get_dfs_region(struct wiphy *wiphy) +{ + const struct ieee80211_regdomain *regd = NULL; + const struct ieee80211_regdomain *wiphy_regd = NULL; + + regd = get_cfg80211_regdom(); + if (!wiphy) + goto out; + + wiphy_regd = get_wiphy_regdom(wiphy); + if (!wiphy_regd) + goto out; + + if (wiphy_regd->dfs_region == regd->dfs_region) + goto out; + + REG_DBG_PRINT("%s: device specific dfs_region " + "(%s) disagrees with cfg80211's " + "central dfs_region (%s)\n", + dev_name(&wiphy->dev), + reg_dfs_region_str(wiphy_regd->dfs_region), + reg_dfs_region_str(regd->dfs_region)); + +out: + return regd->dfs_region; +} + static void rcu_free_regdom(const struct ieee80211_regdomain *r) { if (!r) @@ -163,35 +205,29 @@ static const struct ieee80211_regdomain world_regdom = { REG_RULE(2412-10, 2462+10, 40, 6, 20, 0), /* IEEE 802.11b/g, channels 12..13. */ REG_RULE(2467-10, 2472+10, 40, 6, 20, - NL80211_RRF_PASSIVE_SCAN | - NL80211_RRF_NO_IBSS), + NL80211_RRF_NO_IR), /* IEEE 802.11 channel 14 - Only JP enables * this and for 802.11b only */ REG_RULE(2484-10, 2484+10, 20, 6, 20, - NL80211_RRF_PASSIVE_SCAN | - NL80211_RRF_NO_IBSS | + NL80211_RRF_NO_IR | NL80211_RRF_NO_OFDM), /* IEEE 802.11a, channel 36..48 */ REG_RULE(5180-10, 5240+10, 160, 6, 20, - NL80211_RRF_PASSIVE_SCAN | - NL80211_RRF_NO_IBSS), + NL80211_RRF_NO_IR), /* IEEE 802.11a, channel 52..64 - DFS required */ REG_RULE(5260-10, 5320+10, 160, 6, 20, - NL80211_RRF_PASSIVE_SCAN | - NL80211_RRF_NO_IBSS | + NL80211_RRF_NO_IR | NL80211_RRF_DFS), /* IEEE 802.11a, channel 100..144 - DFS required */ REG_RULE(5500-10, 5720+10, 160, 6, 20, - NL80211_RRF_PASSIVE_SCAN | - NL80211_RRF_NO_IBSS | + NL80211_RRF_NO_IR | NL80211_RRF_DFS), /* IEEE 802.11a, channel 149..165 */ REG_RULE(5745-10, 5825+10, 80, 6, 20, - NL80211_RRF_PASSIVE_SCAN | - NL80211_RRF_NO_IBSS), + NL80211_RRF_NO_IR), /* IEEE 802.11ad (60gHz), channels 1..3 */ REG_RULE(56160+2160*1-1080, 56160+2160*3+1080, 2160, 0, 0, 0), @@ -208,11 +244,26 @@ static char user_alpha2[2]; module_param(ieee80211_regdom, charp, 0444); MODULE_PARM_DESC(ieee80211_regdom, "IEEE 802.11 regulatory domain code"); +static void reg_kfree_last_request(void) +{ + struct regulatory_request *lr; + + lr = get_last_request(); + + if (lr != &core_request_world && lr) + kfree_rcu(lr, rcu_head); +} + +static void reg_update_last_request(struct regulatory_request *request) +{ + reg_kfree_last_request(); + rcu_assign_pointer(last_request, request); +} + static void reset_regdomains(bool full_reset, const struct ieee80211_regdomain *new_regdom) { const struct ieee80211_regdomain *r; - struct regulatory_request *lr; ASSERT_RTNL(); @@ -235,10 +286,7 @@ static void reset_regdomains(bool full_reset, if (!full_reset) return; - lr = get_last_request(); - if (lr != &core_request_world && lr) - kfree_rcu(lr, rcu_head); - rcu_assign_pointer(last_request, &core_request_world); + reg_update_last_request(&core_request_world); } /* @@ -456,7 +504,15 @@ static int call_crda(const char *alpha2) return kobject_uevent(®_pdev->dev.kobj, KOBJ_CHANGE); } -static bool reg_is_valid_request(const char *alpha2) +static enum reg_request_treatment +reg_call_crda(struct regulatory_request *request) +{ + if (call_crda(request->alpha2)) + return REG_REQ_IGNORE; + return REG_REQ_OK; +} + +bool reg_is_valid_request(const char *alpha2) { struct regulatory_request *lr = get_last_request(); @@ -557,6 +613,20 @@ static bool freq_in_rule_band(const struct ieee80211_freq_range *freq_range, } /* + * Later on we can perhaps use the more restrictive DFS + * region but we don't have information for that yet so + * for now simply disallow conflicts. + */ +static enum nl80211_dfs_regions +reg_intersect_dfs_region(const enum nl80211_dfs_regions dfs_region1, + const enum nl80211_dfs_regions dfs_region2) +{ + if (dfs_region1 != dfs_region2) + return NL80211_DFS_UNSET; + return dfs_region1; +} + +/* * Helper for regdom_intersect(), this does the real * mathematical intersection fun */ @@ -687,6 +757,8 @@ regdom_intersect(const struct ieee80211_regdomain *rd1, rd->n_reg_rules = num_rules; rd->alpha2[0] = '9'; rd->alpha2[1] = '8'; + rd->dfs_region = reg_intersect_dfs_region(rd1->dfs_region, + rd2->dfs_region); return rd; } @@ -698,10 +770,8 @@ regdom_intersect(const struct ieee80211_regdomain *rd1, static u32 map_regdom_flags(u32 rd_flags) { u32 channel_flags = 0; - if (rd_flags & NL80211_RRF_PASSIVE_SCAN) - channel_flags |= IEEE80211_CHAN_PASSIVE_SCAN; - if (rd_flags & NL80211_RRF_NO_IBSS) - channel_flags |= IEEE80211_CHAN_NO_IBSS; + if (rd_flags & NL80211_RRF_NO_IR_ALL) + channel_flags |= IEEE80211_CHAN_NO_IR; if (rd_flags & NL80211_RRF_DFS) channel_flags |= IEEE80211_CHAN_RADAR; if (rd_flags & NL80211_RRF_NO_OFDM) @@ -854,8 +924,18 @@ static void handle_channel(struct wiphy *wiphy, PTR_ERR(reg_rule) == -ERANGE) return; - REG_DBG_PRINT("Disabling freq %d MHz\n", chan->center_freq); - chan->flags |= IEEE80211_CHAN_DISABLED; + if (lr->initiator == NL80211_REGDOM_SET_BY_DRIVER && + request_wiphy && request_wiphy == wiphy && + request_wiphy->regulatory_flags & REGULATORY_STRICT_REG) { + REG_DBG_PRINT("Disabling freq %d MHz for good\n", + chan->center_freq); + chan->orig_flags |= IEEE80211_CHAN_DISABLED; + chan->flags = chan->orig_flags; + } else { + REG_DBG_PRINT("Disabling freq %d MHz\n", + chan->center_freq); + chan->flags |= IEEE80211_CHAN_DISABLED; + } return; } @@ -873,7 +953,7 @@ static void handle_channel(struct wiphy *wiphy, if (lr->initiator == NL80211_REGDOM_SET_BY_DRIVER && request_wiphy && request_wiphy == wiphy && - request_wiphy->flags & WIPHY_FLAG_STRICT_REGULATORY) { + request_wiphy->regulatory_flags & REGULATORY_STRICT_REG) { /* * This guarantees the driver's requested regulatory domain * will always be used as a base for further regulatory @@ -899,13 +979,11 @@ static void handle_channel(struct wiphy *wiphy, chan->max_reg_power = (int) MBM_TO_DBM(power_rule->max_eirp); if (chan->orig_mpwr) { /* - * Devices that have their own custom regulatory domain - * but also use WIPHY_FLAG_STRICT_REGULATORY will follow the - * passed country IE power settings. + * Devices that use REGULATORY_COUNTRY_IE_FOLLOW_POWER + * will always follow the passed country IE power settings. */ if (initiator == NL80211_REGDOM_SET_BY_COUNTRY_IE && - wiphy->flags & WIPHY_FLAG_CUSTOM_REGULATORY && - wiphy->flags & WIPHY_FLAG_STRICT_REGULATORY) + wiphy->regulatory_flags & REGULATORY_COUNTRY_IE_FOLLOW_POWER) chan->max_power = chan->max_reg_power; else chan->max_power = min(chan->orig_mpwr, @@ -975,8 +1053,8 @@ static bool reg_dev_ignore_cell_hint(struct wiphy *wiphy) static bool wiphy_strict_alpha2_regd(struct wiphy *wiphy) { - if (wiphy->flags & WIPHY_FLAG_STRICT_REGULATORY && - !(wiphy->flags & WIPHY_FLAG_CUSTOM_REGULATORY)) + if (wiphy->regulatory_flags & REGULATORY_STRICT_REG && + !(wiphy->regulatory_flags & REGULATORY_CUSTOM_REG)) return true; return false; } @@ -994,7 +1072,7 @@ static bool ignore_reg_update(struct wiphy *wiphy, } if (initiator == NL80211_REGDOM_SET_BY_CORE && - wiphy->flags & WIPHY_FLAG_CUSTOM_REGULATORY) { + wiphy->regulatory_flags & REGULATORY_CUSTOM_REG) { REG_DBG_PRINT("Ignoring regulatory request set by %s " "since the driver uses its own custom " "regulatory domain\n", @@ -1032,7 +1110,7 @@ static bool reg_is_world_roaming(struct wiphy *wiphy) return true; if (lr && lr->initiator != NL80211_REGDOM_SET_BY_COUNTRY_IE && - wiphy->flags & WIPHY_FLAG_CUSTOM_REGULATORY) + wiphy->regulatory_flags & REGULATORY_CUSTOM_REG) return true; return false; @@ -1060,19 +1138,14 @@ static void handle_reg_beacon(struct wiphy *wiphy, unsigned int chan_idx, if (!reg_is_world_roaming(wiphy)) return; - if (wiphy->flags & WIPHY_FLAG_DISABLE_BEACON_HINTS) + if (wiphy->regulatory_flags & REGULATORY_DISABLE_BEACON_HINTS) return; chan_before.center_freq = chan->center_freq; chan_before.flags = chan->flags; - if (chan->flags & IEEE80211_CHAN_PASSIVE_SCAN) { - chan->flags &= ~IEEE80211_CHAN_PASSIVE_SCAN; - channel_changed = true; - } - - if (chan->flags & IEEE80211_CHAN_NO_IBSS) { - chan->flags &= ~IEEE80211_CHAN_NO_IBSS; + if (chan->flags & IEEE80211_CHAN_NO_IR) { + chan->flags &= ~IEEE80211_CHAN_NO_IR; channel_changed = true; } @@ -1205,14 +1278,30 @@ static void reg_process_ht_flags(struct wiphy *wiphy) reg_process_ht_flags_band(wiphy, wiphy->bands[band]); } +static void reg_call_notifier(struct wiphy *wiphy, + struct regulatory_request *request) +{ + if (wiphy->reg_notifier) + wiphy->reg_notifier(wiphy, request); +} + static void wiphy_update_regulatory(struct wiphy *wiphy, enum nl80211_reg_initiator initiator) { enum ieee80211_band band; struct regulatory_request *lr = get_last_request(); - if (ignore_reg_update(wiphy, initiator)) + if (ignore_reg_update(wiphy, initiator)) { + /* + * Regulatory updates set by CORE are ignored for custom + * regulatory cards. Let us notify the changes to the driver, + * as some drivers used this to restore its orig_* reg domain. + */ + if (initiator == NL80211_REGDOM_SET_BY_CORE && + wiphy->regulatory_flags & REGULATORY_CUSTOM_REG) + reg_call_notifier(wiphy, lr); return; + } lr->dfs_region = get_cfg80211_regdom()->dfs_region; @@ -1221,9 +1310,7 @@ static void wiphy_update_regulatory(struct wiphy *wiphy, reg_process_beacons(wiphy); reg_process_ht_flags(wiphy); - - if (wiphy->reg_notifier) - wiphy->reg_notifier(wiphy, lr); + reg_call_notifier(wiphy, lr); } static void update_all_wiphy_regulatory(enum nl80211_reg_initiator initiator) @@ -1236,15 +1323,6 @@ static void update_all_wiphy_regulatory(enum nl80211_reg_initiator initiator) list_for_each_entry(rdev, &cfg80211_rdev_list, list) { wiphy = &rdev->wiphy; wiphy_update_regulatory(wiphy, initiator); - /* - * Regulatory updates set by CORE are ignored for custom - * regulatory cards. Let us notify the changes to the driver, - * as some drivers used this to restore its orig_* reg domain. - */ - if (initiator == NL80211_REGDOM_SET_BY_CORE && - wiphy->flags & WIPHY_FLAG_CUSTOM_REGULATORY && - wiphy->reg_notifier) - wiphy->reg_notifier(wiphy, get_last_request()); } } @@ -1263,7 +1341,8 @@ static void handle_channel_custom(struct wiphy *wiphy, 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; + chan->orig_flags |= IEEE80211_CHAN_DISABLED; + chan->flags = chan->orig_flags; return; } @@ -1305,6 +1384,10 @@ void wiphy_apply_custom_regulatory(struct wiphy *wiphy, enum ieee80211_band band; unsigned int bands_set = 0; + WARN(!(wiphy->regulatory_flags & REGULATORY_CUSTOM_REG), + "wiphy should have REGULATORY_CUSTOM_REG\n"); + wiphy->regulatory_flags |= REGULATORY_CUSTOM_REG; + for (band = 0; band < IEEE80211_NUM_BANDS; band++) { if (!wiphy->bands[band]) continue; @@ -1320,225 +1403,285 @@ void wiphy_apply_custom_regulatory(struct wiphy *wiphy, } EXPORT_SYMBOL(wiphy_apply_custom_regulatory); -/* This has the logic which determines when a new request - * should be ignored. */ -static enum reg_request_treatment -get_reg_request_treatment(struct wiphy *wiphy, - struct regulatory_request *pending_request) +static void reg_set_request_processed(void) { - struct wiphy *last_wiphy = NULL; + bool need_more_processing = false; struct regulatory_request *lr = get_last_request(); - /* All initial requests are respected */ - if (!lr) - return REG_REQ_OK; + lr->processed = true; - switch (pending_request->initiator) { - case NL80211_REGDOM_SET_BY_CORE: - return REG_REQ_OK; - case NL80211_REGDOM_SET_BY_COUNTRY_IE: - if (reg_request_cell_base(lr)) { - /* Trust a Cell base station over the AP's country IE */ - if (regdom_changes(pending_request->alpha2)) - return REG_REQ_IGNORE; - return REG_REQ_ALREADY_SET; - } + spin_lock(®_requests_lock); + if (!list_empty(®_requests_list)) + need_more_processing = true; + spin_unlock(®_requests_lock); - last_wiphy = wiphy_idx_to_wiphy(lr->wiphy_idx); + if (lr->initiator == NL80211_REGDOM_SET_BY_USER) + cancel_delayed_work(®_timeout); - if (unlikely(!is_an_alpha2(pending_request->alpha2))) - return -EINVAL; - if (lr->initiator == NL80211_REGDOM_SET_BY_COUNTRY_IE) { - if (last_wiphy != wiphy) { - /* - * Two cards with two APs claiming different - * Country IE alpha2s. We could - * intersect them, but that seems unlikely - * to be correct. Reject second one for now. - */ - if (regdom_changes(pending_request->alpha2)) - 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 REG_REQ_OK; - return REG_REQ_ALREADY_SET; - } - return REG_REQ_OK; - case NL80211_REGDOM_SET_BY_DRIVER: - if (lr->initiator == NL80211_REGDOM_SET_BY_CORE) { - if (regdom_changes(pending_request->alpha2)) - return REG_REQ_OK; - return REG_REQ_ALREADY_SET; - } + if (need_more_processing) + schedule_work(®_work); +} - /* - * This would happen if you unplug and plug your card - * back in or if you add a new device for which the previously - * loaded card also agrees on the regulatory domain. - */ - if (lr->initiator == NL80211_REGDOM_SET_BY_DRIVER && - !regdom_changes(pending_request->alpha2)) - return REG_REQ_ALREADY_SET; +/** + * reg_process_hint_core - process core regulatory requests + * @pending_request: a pending core regulatory request + * + * The wireless subsystem can use this function to process + * a regulatory request issued by the regulatory core. + * + * Returns one of the different reg request treatment values. + */ +static enum reg_request_treatment +reg_process_hint_core(struct regulatory_request *core_request) +{ + + core_request->intersect = false; + core_request->processed = false; + + reg_update_last_request(core_request); + + return reg_call_crda(core_request); +} +static enum reg_request_treatment +__reg_process_hint_user(struct regulatory_request *user_request) +{ + struct regulatory_request *lr = get_last_request(); + + if (reg_request_cell_base(user_request)) + return reg_ignore_cell_hint(user_request); + + if (reg_request_cell_base(lr)) + return REG_REQ_IGNORE; + + if (lr->initiator == NL80211_REGDOM_SET_BY_COUNTRY_IE) 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 the user knows better the user should set the regdom + * to their country before the IE is picked up + */ + 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 ((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 (reg_request_cell_base(lr)) - return REG_REQ_IGNORE; + if (!regdom_changes(user_request->alpha2)) + return REG_REQ_ALREADY_SET; - 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 (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 ((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; + return REG_REQ_OK; +} - if (!regdom_changes(pending_request->alpha2)) - return REG_REQ_ALREADY_SET; +/** + * reg_process_hint_user - process user regulatory requests + * @user_request: a pending user regulatory request + * + * The wireless subsystem can use this function to process + * a regulatory request initiated by userspace. + * + * Returns one of the different reg request treatment values. + */ +static enum reg_request_treatment +reg_process_hint_user(struct regulatory_request *user_request) +{ + enum reg_request_treatment treatment; - return REG_REQ_OK; + treatment = __reg_process_hint_user(user_request); + if (treatment == REG_REQ_IGNORE || + treatment == REG_REQ_ALREADY_SET) { + kfree(user_request); + return treatment; } - return REG_REQ_IGNORE; + user_request->intersect = treatment == REG_REQ_INTERSECT; + user_request->processed = false; + + reg_update_last_request(user_request); + + user_alpha2[0] = user_request->alpha2[0]; + user_alpha2[1] = user_request->alpha2[1]; + + return reg_call_crda(user_request); } -static void reg_set_request_processed(void) +static enum reg_request_treatment +__reg_process_hint_driver(struct regulatory_request *driver_request) { - bool need_more_processing = false; struct regulatory_request *lr = get_last_request(); - lr->processed = true; - - spin_lock(®_requests_lock); - if (!list_empty(®_requests_list)) - need_more_processing = true; - spin_unlock(®_requests_lock); + if (lr->initiator == NL80211_REGDOM_SET_BY_CORE) { + if (regdom_changes(driver_request->alpha2)) + return REG_REQ_OK; + return REG_REQ_ALREADY_SET; + } - if (lr->initiator == NL80211_REGDOM_SET_BY_USER) - cancel_delayed_work(®_timeout); + /* + * This would happen if you unplug and plug your card + * back in or if you add a new device for which the previously + * loaded card also agrees on the regulatory domain. + */ + if (lr->initiator == NL80211_REGDOM_SET_BY_DRIVER && + !regdom_changes(driver_request->alpha2)) + return REG_REQ_ALREADY_SET; - if (need_more_processing) - schedule_work(®_work); + return REG_REQ_INTERSECT; } /** - * __regulatory_hint - hint to the wireless core a regulatory domain - * @wiphy: if the hint comes from country information from an AP, this - * is required to be set to the wiphy that received the information - * @pending_request: the regulatory request currently being processed + * reg_process_hint_driver - process driver regulatory requests + * @driver_request: a pending driver regulatory request * - * The Wireless subsystem can use this function to hint to the wireless core - * what it believes should be the current regulatory domain. + * The wireless subsystem can use this function to process + * a regulatory request issued by an 802.11 driver. * * Returns one of the different reg request treatment values. */ static enum reg_request_treatment -__regulatory_hint(struct wiphy *wiphy, - struct regulatory_request *pending_request) +reg_process_hint_driver(struct wiphy *wiphy, + struct regulatory_request *driver_request) { const struct ieee80211_regdomain *regd; - bool intersect = false; enum reg_request_treatment treatment; - struct regulatory_request *lr; - treatment = get_reg_request_treatment(wiphy, pending_request); + treatment = __reg_process_hint_driver(driver_request); switch (treatment) { - case REG_REQ_INTERSECT: - if (pending_request->initiator == - NL80211_REGDOM_SET_BY_DRIVER) { - regd = reg_copy_regd(get_cfg80211_regdom()); - if (IS_ERR(regd)) { - kfree(pending_request); - return PTR_ERR(regd); - } - rcu_assign_pointer(wiphy->regd, regd); - } - intersect = true; - 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 (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 REG_REQ_IGNORE; - } - treatment = REG_REQ_ALREADY_SET; - rcu_assign_pointer(wiphy->regd, regd); - goto new_request; - } - kfree(pending_request); + case REG_REQ_IGNORE: + kfree(driver_request); return treatment; + case REG_REQ_INTERSECT: + /* fall through */ + case REG_REQ_ALREADY_SET: + regd = reg_copy_regd(get_cfg80211_regdom()); + if (IS_ERR(regd)) { + kfree(driver_request); + return REG_REQ_IGNORE; + } + rcu_assign_pointer(wiphy->regd, regd); } -new_request: - lr = get_last_request(); - if (lr != &core_request_world && lr) - kfree_rcu(lr, rcu_head); - pending_request->intersect = intersect; - pending_request->processed = false; - rcu_assign_pointer(last_request, pending_request); - lr = pending_request; + driver_request->intersect = treatment == REG_REQ_INTERSECT; + driver_request->processed = false; + + reg_update_last_request(driver_request); + + /* + * 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 (treatment == REG_REQ_ALREADY_SET) { + nl80211_send_reg_change_event(driver_request); + reg_set_request_processed(); + return treatment; + } + + return reg_call_crda(driver_request); +} - pending_request = NULL; +static enum reg_request_treatment +__reg_process_hint_country_ie(struct wiphy *wiphy, + struct regulatory_request *country_ie_request) +{ + struct wiphy *last_wiphy = NULL; + struct regulatory_request *lr = get_last_request(); - if (lr->initiator == NL80211_REGDOM_SET_BY_USER) { - user_alpha2[0] = lr->alpha2[0]; - user_alpha2[1] = lr->alpha2[1]; + if (reg_request_cell_base(lr)) { + /* Trust a Cell base station over the AP's country IE */ + if (regdom_changes(country_ie_request->alpha2)) + return REG_REQ_IGNORE; + return REG_REQ_ALREADY_SET; + } else { + if (wiphy->regulatory_flags & REGULATORY_COUNTRY_IE_IGNORE) + return REG_REQ_IGNORE; } - /* When r == REG_REQ_INTERSECT we do need to call CRDA */ - if (treatment != REG_REQ_OK && treatment != REG_REQ_INTERSECT) { + if (unlikely(!is_an_alpha2(country_ie_request->alpha2))) + return -EINVAL; + + if (lr->initiator != NL80211_REGDOM_SET_BY_COUNTRY_IE) + return REG_REQ_OK; + + last_wiphy = wiphy_idx_to_wiphy(lr->wiphy_idx); + + if (last_wiphy != wiphy) { /* - * 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 + * Two cards with two APs claiming different + * Country IE alpha2s. We could + * intersect them, but that seems unlikely + * to be correct. Reject second one for now. */ - if (treatment == REG_REQ_ALREADY_SET) { - nl80211_send_reg_change_event(lr); - reg_set_request_processed(); - } - return treatment; + if (regdom_changes(country_ie_request->alpha2)) + 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(country_ie_request->alpha2))) + return REG_REQ_OK; + return REG_REQ_ALREADY_SET; +} - if (call_crda(lr->alpha2)) +/** + * reg_process_hint_country_ie - process regulatory requests from country IEs + * @country_ie_request: a regulatory request from a country IE + * + * The wireless subsystem can use this function to process + * a regulatory request issued by a country Information Element. + * + * Returns one of the different reg request treatment values. + */ +static enum reg_request_treatment +reg_process_hint_country_ie(struct wiphy *wiphy, + struct regulatory_request *country_ie_request) +{ + enum reg_request_treatment treatment; + + treatment = __reg_process_hint_country_ie(wiphy, country_ie_request); + + switch (treatment) { + case REG_REQ_OK: + break; + case REG_REQ_IGNORE: + /* fall through */ + case REG_REQ_ALREADY_SET: + kfree(country_ie_request); + return treatment; + case REG_REQ_INTERSECT: + kfree(country_ie_request); + /* + * This doesn't happen yet, not sure we + * ever want to support it for this case. + */ + WARN_ONCE(1, "Unexpected intersection for country IEs"); return REG_REQ_IGNORE; - return REG_REQ_OK; + } + + country_ie_request->intersect = false; + country_ie_request->processed = false; + + reg_update_last_request(country_ie_request); + + return reg_call_crda(country_ie_request); } /* This processes *all* regulatory hints */ -static void reg_process_hint(struct regulatory_request *reg_request, - enum nl80211_reg_initiator reg_initiator) +static void reg_process_hint(struct regulatory_request *reg_request) { struct wiphy *wiphy = NULL; + enum reg_request_treatment treatment; if (WARN_ON(!reg_request->alpha2)) return; @@ -1546,23 +1689,37 @@ static void reg_process_hint(struct regulatory_request *reg_request, 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_request->initiator == NL80211_REGDOM_SET_BY_DRIVER && !wiphy) { kfree(reg_request); 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); + switch (reg_request->initiator) { + case NL80211_REGDOM_SET_BY_CORE: + reg_process_hint_core(reg_request); + return; + case NL80211_REGDOM_SET_BY_USER: + treatment = reg_process_hint_user(reg_request); + if (treatment == REG_REQ_IGNORE || + treatment == REG_REQ_ALREADY_SET) + return; + schedule_delayed_work(®_timeout, msecs_to_jiffies(3142)); + return; + case NL80211_REGDOM_SET_BY_DRIVER: + treatment = reg_process_hint_driver(wiphy, reg_request); break; - default: - if (reg_initiator == NL80211_REGDOM_SET_BY_USER) - schedule_delayed_work(®_timeout, - msecs_to_jiffies(3142)); + case NL80211_REGDOM_SET_BY_COUNTRY_IE: + treatment = reg_process_hint_country_ie(wiphy, reg_request); break; + default: + WARN(1, "invalid initiator %d\n", reg_request->initiator); + return; } + + /* This is required so that the orig_* parameters are saved */ + if (treatment == REG_REQ_ALREADY_SET && wiphy && + wiphy->regulatory_flags & REGULATORY_STRICT_REG) + wiphy_update_regulatory(wiphy, reg_request->initiator); } /* @@ -1596,7 +1753,7 @@ static void reg_process_pending_hints(void) spin_unlock(®_requests_lock); - reg_process_hint(reg_request, reg_request->initiator); + reg_process_hint(reg_request); } /* Processes beacon hints -- this has nothing to do with country IEs */ @@ -1696,6 +1853,8 @@ int regulatory_hint(struct wiphy *wiphy, const char *alpha2) if (WARN_ON(!alpha2 || !wiphy)) return -EINVAL; + wiphy->regulatory_flags &= ~REGULATORY_CUSTOM_REG; + request = kzalloc(sizeof(struct regulatory_request), GFP_KERNEL); if (!request) return -ENOMEM; @@ -1888,7 +2047,7 @@ static void restore_regulatory_settings(bool reset_user) 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) + if (rdev->wiphy.regulatory_flags & REGULATORY_CUSTOM_REG) restore_custom_reg_settings(&rdev->wiphy); } @@ -2016,7 +2175,7 @@ static void print_rd_rules(const struct ieee80211_regdomain *rd) } } -bool reg_supported_dfs_region(u8 dfs_region) +bool reg_supported_dfs_region(enum nl80211_dfs_regions dfs_region) { switch (dfs_region) { case NL80211_DFS_UNSET: @@ -2031,27 +2190,6 @@ bool reg_supported_dfs_region(u8 dfs_region) } } -static void print_dfs_region(u8 dfs_region) -{ - if (!dfs_region) - return; - - switch (dfs_region) { - case NL80211_DFS_FCC: - pr_info(" DFS Master region FCC"); - break; - case NL80211_DFS_ETSI: - pr_info(" DFS Master region ETSI"); - break; - case NL80211_DFS_JP: - pr_info(" DFS Master region JP"); - break; - default: - pr_info(" DFS Master region Unknown"); - break; - } -} - static void print_regdomain(const struct ieee80211_regdomain *rd) { struct regulatory_request *lr = get_last_request(); @@ -2083,7 +2221,7 @@ static void print_regdomain(const struct ieee80211_regdomain *rd) } } - print_dfs_region(rd->dfs_region); + pr_info(" DFS Master region: %s", reg_dfs_region_str(rd->dfs_region)); print_rd_rules(rd); } @@ -2093,48 +2231,60 @@ static void print_regdomain_info(const struct ieee80211_regdomain *rd) print_rd_rules(rd); } -/* Takes ownership of rd only if it doesn't fail */ -static int __set_regdom(const struct ieee80211_regdomain *rd) +static int reg_set_rd_core(const struct ieee80211_regdomain *rd) +{ + if (!is_world_regdom(rd->alpha2)) + return -EINVAL; + update_world_regdomain(rd); + return 0; +} + +static int reg_set_rd_user(const struct ieee80211_regdomain *rd, + struct regulatory_request *user_request) { - 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 (is_world_regdom(rd->alpha2)) + return -EINVAL; + + if (!regdom_changes(rd->alpha2)) + return -EALREADY; - if (!reg_is_valid_request(rd->alpha2)) + if (!is_valid_rd(rd)) { + pr_err("Invalid regulatory domain detected:\n"); + print_regdomain_info(rd); return -EINVAL; + } - if (is_world_regdom(rd->alpha2)) { - update_world_regdomain(rd); + if (!user_request->intersect) { + reset_regdomains(false, rd); return 0; } - if (!is_alpha2_set(rd->alpha2) && !is_an_alpha2(rd->alpha2) && - !is_unknown_alpha2(rd->alpha2)) + intersected_rd = regdom_intersect(rd, get_cfg80211_regdom()); + if (!intersected_rd) return -EINVAL; - /* - * Lets only bother proceeding on the same alpha2 if the current - * rd is non static (it means CRDA was present and was used last) - * and the pending request came in from a 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 - */ - if (!regdom_changes(rd->alpha2)) - return -EALREADY; - } + kfree(rd); + rd = NULL; + reset_regdomains(false, intersected_rd); - /* - * Now lets set the regulatory domain, update all driver channels - * and finally inform them of what we have done, in case they want - * to review or adjust their own settings based on their own - * internal EEPROM data - */ + return 0; +} + +static int reg_set_rd_driver(const struct ieee80211_regdomain *rd, + struct regulatory_request *driver_request) +{ + const struct ieee80211_regdomain *regd; + const struct ieee80211_regdomain *intersected_rd = NULL; + const struct ieee80211_regdomain *tmp; + struct wiphy *request_wiphy; + + if (is_world_regdom(rd->alpha2)) + return -EINVAL; + + if (!regdom_changes(rd->alpha2)) + return -EALREADY; if (!is_valid_rd(rd)) { pr_err("Invalid regulatory domain detected:\n"); @@ -2142,29 +2292,13 @@ static int __set_regdom(const struct ieee80211_regdomain *rd) return -EINVAL; } - request_wiphy = wiphy_idx_to_wiphy(lr->wiphy_idx); - if (!request_wiphy && - (lr->initiator == NL80211_REGDOM_SET_BY_DRIVER || - lr->initiator == NL80211_REGDOM_SET_BY_COUNTRY_IE)) { + request_wiphy = wiphy_idx_to_wiphy(driver_request->wiphy_idx); + if (!request_wiphy) { schedule_delayed_work(®_timeout, 0); return -ENODEV; } - if (!lr->intersect) { - if (lr->initiator != NL80211_REGDOM_SET_BY_DRIVER) { - reset_regdomains(false, rd); - return 0; - } - - /* - * For a driver hint, lets copy the regulatory domain the - * driver wanted to the wiphy to deal with conflicts - */ - - /* - * Userspace could have sent two replies with only - * one kernel request. - */ + if (!driver_request->intersect) { if (request_wiphy->regd) return -EALREADY; @@ -2177,38 +2311,59 @@ static int __set_regdom(const struct ieee80211_regdomain *rd) return 0; } - /* Intersection requires a bit more work */ + intersected_rd = regdom_intersect(rd, get_cfg80211_regdom()); + if (!intersected_rd) + return -EINVAL; - if (lr->initiator != NL80211_REGDOM_SET_BY_COUNTRY_IE) { - intersected_rd = regdom_intersect(rd, get_cfg80211_regdom()); - if (!intersected_rd) - return -EINVAL; + /* + * We can trash what CRDA provided now. + * However if a driver requested this specific regulatory + * domain we keep it for its private use + */ + tmp = get_wiphy_regdom(request_wiphy); + rcu_assign_pointer(request_wiphy->regd, rd); + rcu_free_regdom(tmp); - /* - * We can trash what CRDA provided now. - * However if a driver requested this specific regulatory - * domain we keep it for its private use - */ - if (lr->initiator == NL80211_REGDOM_SET_BY_DRIVER) { - const struct ieee80211_regdomain *tmp; + rd = NULL; - tmp = get_wiphy_regdom(request_wiphy); - rcu_assign_pointer(request_wiphy->regd, rd); - rcu_free_regdom(tmp); - } else { - kfree(rd); - } + reset_regdomains(false, intersected_rd); - rd = NULL; + return 0; +} - reset_regdomains(false, intersected_rd); +static int reg_set_rd_country_ie(const struct ieee80211_regdomain *rd, + struct regulatory_request *country_ie_request) +{ + struct wiphy *request_wiphy; - return 0; + if (!is_alpha2_set(rd->alpha2) && !is_an_alpha2(rd->alpha2) && + !is_unknown_alpha2(rd->alpha2)) + return -EINVAL; + + /* + * Lets only bother proceeding on the same alpha2 if the current + * rd is non static (it means CRDA was present and was used last) + * and the pending request came in from a country IE + */ + + if (!is_valid_rd(rd)) { + pr_err("Invalid regulatory domain detected:\n"); + print_regdomain_info(rd); + return -EINVAL; } - return -EINVAL; -} + request_wiphy = wiphy_idx_to_wiphy(country_ie_request->wiphy_idx); + if (!request_wiphy) { + schedule_delayed_work(®_timeout, 0); + return -ENODEV; + } + + if (country_ie_request->intersect) + return -EINVAL; + reset_regdomains(false, rd); + return 0; +} /* * Use this call to set the current regulatory domain. Conflicts with @@ -2218,15 +2373,45 @@ static int __set_regdom(const struct ieee80211_regdomain *rd) int set_regdom(const struct ieee80211_regdomain *rd) { struct regulatory_request *lr; + bool user_reset = false; int r; + if (!reg_is_valid_request(rd->alpha2)) { + kfree(rd); + return -EINVAL; + } + lr = get_last_request(); /* Note that this doesn't update the wiphys, this is done below */ - r = __set_regdom(rd); + switch (lr->initiator) { + case NL80211_REGDOM_SET_BY_CORE: + r = reg_set_rd_core(rd); + break; + case NL80211_REGDOM_SET_BY_USER: + r = reg_set_rd_user(rd, lr); + user_reset = true; + break; + case NL80211_REGDOM_SET_BY_DRIVER: + r = reg_set_rd_driver(rd, lr); + break; + case NL80211_REGDOM_SET_BY_COUNTRY_IE: + r = reg_set_rd_country_ie(rd, lr); + break; + default: + WARN(1, "invalid initiator %d\n", lr->initiator); + return -EINVAL; + } + if (r) { - if (r == -EALREADY) + switch (r) { + case -EALREADY: reg_set_request_processed(); + break; + default: + /* Back to world regulatory in case of errors */ + restore_regulatory_settings(user_reset); + } kfree(rd); return r; |