Orange Pi5 kernel

/*
 * Copyright 2002-2005, Instant802 Networks, Inc.
 * Copyright 2005-2006, Devicescape Software, Inc.
 * Copyright 2007	Johannes Berg <johannes@sipsolutions.net>
 * Copyright 2008-2011	Luis R. Rodriguez <mcgrof@qca.qualcomm.com>
 * Copyright 2013-2014  Intel Mobile Communications GmbH
 * Copyright      2017  Intel Deutschland GmbH
 * Copyright (C) 2018 - 2019 Intel Corporation
 *
 * Permission to use, copy, modify, and/or distribute this software for any
 * purpose with or without fee is hereby granted, provided that the above
 * copyright notice and this permission notice appear in all copies.
 *
 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 */
 
 
/**
 * DOC: Wireless regulatory infrastructure
 *
 * The usual implementation is for a driver to read a device EEPROM to
 * determine which regulatory domain it should be operating under, then
 * looking up the allowable channels in a driver-local table and finally
 * registering those channels in the wiphy structure.
 *
 * Another set of compliance enforcement is for drivers to use their
 * own compliance limits which can be stored on the EEPROM. The host
 * driver or firmware may ensure these are used.
 *
 * In addition to all this we provide an extra layer of regulatory
 * conformance. For drivers which do not have any regulatory
 * information CRDA provides the complete regulatory solution.
 * For others it provides a community effort on further restrictions
 * to enhance compliance.
 *
 * Note: When number of rules --> infinity we will not be able to
 * index on alpha2 any more, instead we'll probably have to
 * rely on some SHA1 checksum of the regdomain for example.
 *
 */
 
#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
 
#include <linux/kernel.h>
#include <linux/export.h>
#include <linux/slab.h>
#include <linux/list.h>
#include <linux/ctype.h>
#include <linux/nl80211.h>
#include <linux/platform_device.h>
#include <linux/verification.h>
#include <linux/moduleparam.h>
#include <linux/firmware.h>
#include <net/cfg80211.h>
#include "core.h"
#include "reg.h"
#include "rdev-ops.h"
#include "nl80211.h"
 
/*
 * Grace period we give before making sure all current interfaces reside on
 * channels allowed by the current regulatory domain.
 */
#define REG_ENFORCE_GRACE_MS 60000
 
/**
 * enum reg_request_treatment - regulatory request treatment
 *
 * @REG_REQ_OK: continue processing the regulatory request
 * @REG_REQ_IGNORE: ignore the regulatory request
 * @REG_REQ_INTERSECT: the regulatory domain resulting from this request should
 *	be intersected with the current one.
 * @REG_REQ_ALREADY_SET: the regulatory request will not change the current
 *	regulatory settings, and no further processing is required.
 */
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',
<------>.alpha2[1] = '0',
<------>.intersect = false,
<------>.processed = true,
<------>.country_ie_env = ENVIRON_ANY,
};
 
/*
 * Receipt of information from last regulatory request,
 * protected by RTNL (and can be accessed with RCU protection)
 */
static struct regulatory_request __rcu *last_request =
<------>(void __force __rcu *)&core_request_world;
 
/* To trigger userspace events and load firmware */
static struct platform_device *reg_pdev;
 
/*
 * 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.
 * (protected by RTNL, can be read under RCU)
 */
const struct ieee80211_regdomain __rcu *cfg80211_regdomain;
 
/*
 * Number of devices that registered to the core
 * that support cellular base station regulatory hints
 * (protected by RTNL)
 */
static int reg_num_devs_support_basehint;
 
/*
 * State variable indicating if the platform on which the devices
 * are attached is operating in an indoor environment. The state variable
 * is relevant for all registered devices.
 */
static bool reg_is_indoor;
static spinlock_t reg_indoor_lock;
 
/* Used to track the userspace process controlling the indoor setting */
static u32 reg_is_indoor_portid;
 
static void restore_regulatory_settings(bool reset_user, bool cached);
static void print_regdomain(const struct ieee80211_regdomain *rd);
 
static const struct ieee80211_regdomain *get_cfg80211_regdom(void)
{
<------>return rcu_dereference_rtnl(cfg80211_regdomain);
}
 
const struct ieee80211_regdomain *get_wiphy_regdom(struct wiphy *wiphy)
{
<------>return rcu_dereference_rtnl(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;
 
<------>pr_debug("%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)
<------><------>return;
<------>kfree_rcu((struct ieee80211_regdomain *)r, rcu_head);
}
 
static struct regulatory_request *get_last_request(void)
{
<------>return rcu_dereference_rtnl(last_request);
}
 
/* Used to queue up regulatory hints */
static LIST_HEAD(reg_requests_list);
static spinlock_t reg_requests_lock;
 
/* Used to queue up beacon hints for review */
static LIST_HEAD(reg_pending_beacons);
static spinlock_t reg_pending_beacons_lock;
 
/* Used to keep track of processed beacon hints */
static LIST_HEAD(reg_beacon_list);
 
struct reg_beacon {
<------>struct list_head list;
<------>struct ieee80211_channel chan;
};
 
static void reg_check_chans_work(struct work_struct *work);
static DECLARE_DELAYED_WORK(reg_check_chans, reg_check_chans_work);
 
static void reg_todo(struct work_struct *work);
static DECLARE_WORK(reg_work, reg_todo);
 
/* We keep a static world regulatory domain in case of the absence of CRDA */
static const struct ieee80211_regdomain world_regdom = {
<------>.n_reg_rules = 8,
<------>.alpha2 =  "00",
<------>.reg_rules = {
<------><------>/* IEEE 802.11b/g, channels 1..11 */
<------><------>REG_RULE(2412-10, 2462+10, 40, 6, 20, 0),
<------><------>/* IEEE 802.11b/g, channels 12..13. */
<------><------>REG_RULE(2467-10, 2472+10, 20, 6, 20,
<------><------><------>NL80211_RRF_NO_IR | NL80211_RRF_AUTO_BW),
<------><------>/* 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_NO_IR |
<------><------><------>NL80211_RRF_NO_OFDM),
<------><------>/* IEEE 802.11a, channel 36..48 */
<------><------>REG_RULE(5180-10, 5240+10, 80, 6, 20,
                        NL80211_RRF_NO_IR |
                        NL80211_RRF_AUTO_BW),
 
<------><------>/* IEEE 802.11a, channel 52..64 - DFS required */
<------><------>REG_RULE(5260-10, 5320+10, 80, 6, 20,
<------><------><------>NL80211_RRF_NO_IR |
<------><------><------>NL80211_RRF_AUTO_BW |
<------><------><------>NL80211_RRF_DFS),
 
<------><------>/* IEEE 802.11a, channel 100..144 - DFS required */
<------><------>REG_RULE(5500-10, 5720+10, 160, 6, 20,
<------><------><------>NL80211_RRF_NO_IR |
<------><------><------>NL80211_RRF_DFS),
 
<------><------>/* IEEE 802.11a, channel 149..165 */
<------><------>REG_RULE(5745-10, 5825+10, 80, 6, 20,
<------><------><------>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),
<------>}
};
 
/* protected by RTNL */
static const struct ieee80211_regdomain *cfg80211_world_regdom =
<------>&world_regdom;
 
static char *ieee80211_regdom = "00";
static char user_alpha2[2];
static const struct ieee80211_regdomain *cfg80211_user_regdom;
 
module_param(ieee80211_regdom, charp, 0444);
MODULE_PARM_DESC(ieee80211_regdom, "IEEE 802.11 regulatory domain code");
 
static void reg_free_request(struct regulatory_request *request)
{
<------>if (request == &core_request_world)
<------><------>return;
 
<------>if (request != get_last_request())
<------><------>kfree(request);
}
 
static void reg_free_last_request(void)
{
<------>struct regulatory_request *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)
{
<------>struct regulatory_request *lr;
 
<------>lr = get_last_request();
<------>if (lr == request)
<------><------>return;
 
<------>reg_free_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;
 
<------>ASSERT_RTNL();
 
<------>r = get_cfg80211_regdom();
 
<------>/* avoid freeing static information or freeing something twice */
<------>if (r == cfg80211_world_regdom)
<------><------>r = NULL;
<------>if (cfg80211_world_regdom == &world_regdom)
<------><------>cfg80211_world_regdom = NULL;
<------>if (r == &world_regdom)
<------><------>r = NULL;
 
<------>rcu_free_regdom(r);
<------>rcu_free_regdom(cfg80211_world_regdom);
 
<------>cfg80211_world_regdom = &world_regdom;
<------>rcu_assign_pointer(cfg80211_regdomain, new_regdom);
 
<------>if (!full_reset)
<------><------>return;
 
<------>reg_update_last_request(&core_request_world);
}
 
/*
 * Dynamic world regulatory domain requested by the wireless
 * core upon initialization
 */
static void update_world_regdomain(const struct ieee80211_regdomain *rd)
{
<------>struct regulatory_request *lr;
 
<------>lr = get_last_request();
 
<------>WARN_ON(!lr);
 
<------>reset_regdomains(false, rd);
 
<------>cfg80211_world_regdom = rd;
}
 
bool is_world_regdom(const char *alpha2)
{
<------>if (!alpha2)
<------><------>return false;
<------>return alpha2[0] == '0' && alpha2[1] == '0';
}
 
static bool is_alpha2_set(const char *alpha2)
{
<------>if (!alpha2)
<------><------>return false;
<------>return alpha2[0] && alpha2[1];
}
 
static bool is_unknown_alpha2(const char *alpha2)
{
<------>if (!alpha2)
<------><------>return false;
<------>/*
<------> * Special case where regulatory domain was built by driver
<------> * but a specific alpha2 cannot be determined
<------> */
<------>return alpha2[0] == '9' && alpha2[1] == '9';
}
 
static bool is_intersected_alpha2(const char *alpha2)
{
<------>if (!alpha2)
<------><------>return false;
<------>/*
<------> * Special case where regulatory domain is the
<------> * result of an intersection between two regulatory domain
<------> * structures
<------> */
<------>return alpha2[0] == '9' && alpha2[1] == '8';
}
 
static bool is_an_alpha2(const char *alpha2)
{
<------>if (!alpha2)
<------><------>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;
<------>return alpha2_x[0] == alpha2_y[0] && alpha2_x[1] == alpha2_y[1];
}
 
static bool regdom_changes(const char *alpha2)
{
<------>const struct ieee80211_regdomain *r = get_cfg80211_regdom();
 
<------>if (!r)
<------><------>return true;
<------>return !alpha2_equal(r->alpha2, alpha2);
}
 
/*
 * The NL80211_REGDOM_SET_BY_USER regdom alpha2 is cached, this lets
 * you know if a valid regulatory hint with NL80211_REGDOM_SET_BY_USER
 * has ever been issued.
 */
static bool is_user_regdom_saved(void)
{
<------>if (user_alpha2[0] == '9' && user_alpha2[1] == '7')
<------><------>return false;
 
<------>/* This would indicate a mistake on the design */
<------>if (WARN(!is_world_regdom(user_alpha2) && !is_an_alpha2(user_alpha2),
<------><------> "Unexpected user alpha2: %c%c\n",
<------><------> user_alpha2[0], user_alpha2[1]))
<------><------>return false;
 
<------>return true;
}
 
static const struct ieee80211_regdomain *
reg_copy_regd(const struct ieee80211_regdomain *src_regd)
{
<------>struct ieee80211_regdomain *regd;
<------>unsigned int i;
 
<------>regd = kzalloc(struct_size(regd, reg_rules, src_regd->n_reg_rules),
<------><------>       GFP_KERNEL);
<------>if (!regd)
<------><------>return ERR_PTR(-ENOMEM);
 
<------>memcpy(regd, src_regd, sizeof(struct ieee80211_regdomain));
 
<------>for (i = 0; i < src_regd->n_reg_rules; i++)
<------><------>memcpy(&regd->reg_rules[i], &src_regd->reg_rules[i],
<------><------>       sizeof(struct ieee80211_reg_rule));
 
<------>return regd;
}
 
static void cfg80211_save_user_regdom(const struct ieee80211_regdomain *rd)
{
<------>ASSERT_RTNL();
 
<------>if (!IS_ERR(cfg80211_user_regdom))
<------><------>kfree(cfg80211_user_regdom);
<------>cfg80211_user_regdom = reg_copy_regd(rd);
}
 
struct reg_regdb_apply_request {
<------>struct list_head list;
<------>const struct ieee80211_regdomain *regdom;
};
 
static LIST_HEAD(reg_regdb_apply_list);
static DEFINE_MUTEX(reg_regdb_apply_mutex);
 
static void reg_regdb_apply(struct work_struct *work)
{
<------>struct reg_regdb_apply_request *request;
 
<------>rtnl_lock();
 
<------>mutex_lock(&reg_regdb_apply_mutex);
<------>while (!list_empty(&reg_regdb_apply_list)) {
<------><------>request = list_first_entry(&reg_regdb_apply_list,
<------><------><------><------><------>   struct reg_regdb_apply_request,
<------><------><------><------><------>   list);
<------><------>list_del(&request->list);
 
<------><------>set_regdom(request->regdom, REGD_SOURCE_INTERNAL_DB);
<------><------>kfree(request);
<------>}
<------>mutex_unlock(&reg_regdb_apply_mutex);
 
<------>rtnl_unlock();
}
 
static DECLARE_WORK(reg_regdb_work, reg_regdb_apply);
 
static int reg_schedule_apply(const struct ieee80211_regdomain *regdom)
{
<------>struct reg_regdb_apply_request *request;
 
<------>request = kzalloc(sizeof(struct reg_regdb_apply_request), GFP_KERNEL);
<------>if (!request) {
<------><------>kfree(regdom);
<------><------>return -ENOMEM;
<------>}
 
<------>request->regdom = regdom;
 
<------>mutex_lock(&reg_regdb_apply_mutex);
<------>list_add_tail(&request->list, &reg_regdb_apply_list);
<------>mutex_unlock(&reg_regdb_apply_mutex);
 
<------>schedule_work(&reg_regdb_work);
<------>return 0;
}
 
#ifdef CONFIG_CFG80211_CRDA_SUPPORT
/* Max number of consecutive attempts to communicate with CRDA  */
#define REG_MAX_CRDA_TIMEOUTS 10
 
static u32 reg_crda_timeouts;
 
static void crda_timeout_work(struct work_struct *work);
static DECLARE_DELAYED_WORK(crda_timeout, crda_timeout_work);
 
static void crda_timeout_work(struct work_struct *work)
{
<------>pr_debug("Timeout while waiting for CRDA to reply, restoring regulatory settings\n");
<------>rtnl_lock();
<------>reg_crda_timeouts++;
<------>restore_regulatory_settings(true, false);
<------>rtnl_unlock();
}
 
static void cancel_crda_timeout(void)
{
<------>cancel_delayed_work(&crda_timeout);
}
 
static void cancel_crda_timeout_sync(void)
{
<------>cancel_delayed_work_sync(&crda_timeout);
}
 
static void reset_crda_timeouts(void)
{
<------>reg_crda_timeouts = 0;
}
 
/*
 * This lets us keep regulatory code which is updated on a regulatory
 * basis in userspace.
 */
static int call_crda(const char *alpha2)
{
<------>char country[12];
<------>char *env[] = { country, NULL };
<------>int ret;
 
<------>snprintf(country, sizeof(country), "COUNTRY=%c%c",
<------><------> alpha2[0], alpha2[1]);
 
<------>if (reg_crda_timeouts > REG_MAX_CRDA_TIMEOUTS) {
<------><------>pr_debug("Exceeded CRDA call max attempts. Not calling CRDA\n");
<------><------>return -EINVAL;
<------>}
 
<------>if (!is_world_regdom((char *) alpha2))
<------><------>pr_debug("Calling CRDA for country: %c%c\n",
<------><------><------> alpha2[0], alpha2[1]);
<------>else
<------><------>pr_debug("Calling CRDA to update world regulatory domain\n");
 
<------>ret = kobject_uevent_env(&reg_pdev->dev.kobj, KOBJ_CHANGE, env);
<------>if (ret)
<------><------>return ret;
 
<------>queue_delayed_work(system_power_efficient_wq,
<------><------><------>   &crda_timeout, msecs_to_jiffies(3142));
<------>return 0;
}
#else
static inline void cancel_crda_timeout(void) {}
static inline void cancel_crda_timeout_sync(void) {}
static inline void reset_crda_timeouts(void) {}
static inline int call_crda(const char *alpha2)
{
<------>return -ENODATA;
}
#endif /* CONFIG_CFG80211_CRDA_SUPPORT */
 
/* code to directly load a firmware database through request_firmware */
static const struct fwdb_header *regdb;
 
struct fwdb_country {
<------>u8 alpha2[2];
<------>__be16 coll_ptr;
<------>/* this struct cannot be extended */
} __packed __aligned(4);
 
struct fwdb_collection {
<------>u8 len;
<------>u8 n_rules;
<------>u8 dfs_region;
<------>/* no optional data yet */
<------>/* aligned to 2, then followed by __be16 array of rule pointers */
} __packed __aligned(4);
 
enum fwdb_flags {
<------>FWDB_FLAG_NO_OFDM	= BIT(0),
<------>FWDB_FLAG_NO_OUTDOOR	= BIT(1),
<------>FWDB_FLAG_DFS		= BIT(2),
<------>FWDB_FLAG_NO_IR		= BIT(3),
<------>FWDB_FLAG_AUTO_BW	= BIT(4),
};
 
struct fwdb_wmm_ac {
<------>u8 ecw;
<------>u8 aifsn;
<------>__be16 cot;
} __packed;
 
struct fwdb_wmm_rule {
<------>struct fwdb_wmm_ac client[IEEE80211_NUM_ACS];
<------>struct fwdb_wmm_ac ap[IEEE80211_NUM_ACS];
} __packed;
 
struct fwdb_rule {
<------>u8 len;
<------>u8 flags;
<------>__be16 max_eirp;
<------>__be32 start, end, max_bw;
<------>/* start of optional data */
<------>__be16 cac_timeout;
<------>__be16 wmm_ptr;
} __packed __aligned(4);
 
#define FWDB_MAGIC 0x52474442
#define FWDB_VERSION 20
 
struct fwdb_header {
<------>__be32 magic;
<------>__be32 version;
<------>struct fwdb_country country[];
} __packed __aligned(4);
 
static int ecw2cw(int ecw)
{
<------>return (1 << ecw) - 1;
}
 
static bool valid_wmm(struct fwdb_wmm_rule *rule)
{
<------>struct fwdb_wmm_ac *ac = (struct fwdb_wmm_ac *)rule;
<------>int i;
 
<------>for (i = 0; i < IEEE80211_NUM_ACS * 2; i++) {
<------><------>u16 cw_min = ecw2cw((ac[i].ecw & 0xf0) >> 4);
<------><------>u16 cw_max = ecw2cw(ac[i].ecw & 0x0f);
<------><------>u8 aifsn = ac[i].aifsn;
 
<------><------>if (cw_min >= cw_max)
<------><------><------>return false;
 
<------><------>if (aifsn < 1)
<------><------><------>return false;
<------>}
 
<------>return true;
}
 
static bool valid_rule(const u8 *data, unsigned int size, u16 rule_ptr)
{
<------>struct fwdb_rule *rule = (void *)(data + (rule_ptr << 2));
 
<------>if ((u8 *)rule + sizeof(rule->len) > data + size)
<------><------>return false;
 
<------>/* mandatory fields */
<------>if (rule->len < offsetofend(struct fwdb_rule, max_bw))
<------><------>return false;
<------>if (rule->len >= offsetofend(struct fwdb_rule, wmm_ptr)) {
<------><------>u32 wmm_ptr = be16_to_cpu(rule->wmm_ptr) << 2;
<------><------>struct fwdb_wmm_rule *wmm;
 
<------><------>if (wmm_ptr + sizeof(struct fwdb_wmm_rule) > size)
<------><------><------>return false;
 
<------><------>wmm = (void *)(data + wmm_ptr);
 
<------><------>if (!valid_wmm(wmm))
<------><------><------>return false;
<------>}
<------>return true;
}
 
static bool valid_country(const u8 *data, unsigned int size,
<------><------><------>  const struct fwdb_country *country)
{
<------>unsigned int ptr = be16_to_cpu(country->coll_ptr) << 2;
<------>struct fwdb_collection *coll = (void *)(data + ptr);
<------>__be16 *rules_ptr;
<------>unsigned int i;
 
<------>/* make sure we can read len/n_rules */
<------>if ((u8 *)coll + offsetofend(typeof(*coll), n_rules) > data + size)
<------><------>return false;
 
<------>/* make sure base struct and all rules fit */
<------>if ((u8 *)coll + ALIGN(coll->len, 2) +
<------>    (coll->n_rules * 2) > data + size)
<------><------>return false;
 
<------>/* mandatory fields must exist */
<------>if (coll->len < offsetofend(struct fwdb_collection, dfs_region))
<------><------>return false;
 
<------>rules_ptr = (void *)((u8 *)coll + ALIGN(coll->len, 2));
 
<------>for (i = 0; i < coll->n_rules; i++) {
<------><------>u16 rule_ptr = be16_to_cpu(rules_ptr[i]);
 
<------><------>if (!valid_rule(data, size, rule_ptr))
<------><------><------>return false;
<------>}
 
<------>return true;
}
 
#ifdef CONFIG_CFG80211_REQUIRE_SIGNED_REGDB
static struct key *builtin_regdb_keys;
 
static void __init load_keys_from_buffer(const u8 *p, unsigned int buflen)
{
<------>const u8 *end = p + buflen;
<------>size_t plen;
<------>key_ref_t key;
 
<------>while (p < end) {
<------><------>/* Each cert begins with an ASN.1 SEQUENCE tag and must be more
<------><------> * than 256 bytes in size.
<------><------> */
<------><------>if (end - p < 4)
<------><------><------>goto dodgy_cert;
<------><------>if (p[0] != 0x30 &&
<------><------>    p[1] != 0x82)
<------><------><------>goto dodgy_cert;
<------><------>plen = (p[2] << 8) | p[3];
<------><------>plen += 4;
<------><------>if (plen > end - p)
<------><------><------>goto dodgy_cert;
 
<------><------>key = key_create_or_update(make_key_ref(builtin_regdb_keys, 1),
<------><------><------><------><------>   "asymmetric", NULL, p, plen,
<------><------><------><------><------>   ((KEY_POS_ALL & ~KEY_POS_SETATTR) |
<------><------><------><------><------>    KEY_USR_VIEW | KEY_USR_READ),
<------><------><------><------><------>   KEY_ALLOC_NOT_IN_QUOTA |
<------><------><------><------><------>   KEY_ALLOC_BUILT_IN |
<------><------><------><------><------>   KEY_ALLOC_BYPASS_RESTRICTION);
<------><------>if (IS_ERR(key)) {
<------><------><------>pr_err("Problem loading in-kernel X.509 certificate (%ld)\n",
<------><------><------>       PTR_ERR(key));
<------><------>} else {
<------><------><------>pr_notice("Loaded X.509 cert '%s'\n",
<------><------><------><------>  key_ref_to_ptr(key)->description);
<------><------><------>key_ref_put(key);
<------><------>}
<------><------>p += plen;
<------>}
 
<------>return;
 
dodgy_cert:
<------>pr_err("Problem parsing in-kernel X.509 certificate list\n");
}
 
static int __init load_builtin_regdb_keys(void)
{
<------>builtin_regdb_keys =
<------><------>keyring_alloc(".builtin_regdb_keys",
<------><------><------>      KUIDT_INIT(0), KGIDT_INIT(0), current_cred(),
<------><------><------>      ((KEY_POS_ALL & ~KEY_POS_SETATTR) |
<------><------><------>      KEY_USR_VIEW | KEY_USR_READ | KEY_USR_SEARCH),
<------><------><------>      KEY_ALLOC_NOT_IN_QUOTA, NULL, NULL);
<------>if (IS_ERR(builtin_regdb_keys))
<------><------>return PTR_ERR(builtin_regdb_keys);
 
<------>pr_notice("Loading compiled-in X.509 certificates for regulatory database\n");
 
#ifdef CONFIG_CFG80211_USE_KERNEL_REGDB_KEYS
<------>load_keys_from_buffer(shipped_regdb_certs, shipped_regdb_certs_len);
#endif
#ifdef CONFIG_CFG80211_EXTRA_REGDB_KEYDIR
<------>if (CONFIG_CFG80211_EXTRA_REGDB_KEYDIR[0] != '\0')
<------><------>load_keys_from_buffer(extra_regdb_certs, extra_regdb_certs_len);
#endif
 
<------>return 0;
}
 
static bool regdb_has_valid_signature(const u8 *data, unsigned int size)
{
<------>const struct firmware *sig;
<------>bool result;
 
<------>if (request_firmware(&sig, "regulatory.db.p7s", &reg_pdev->dev))
<------><------>return false;
 
<------>result = verify_pkcs7_signature(data, size, sig->data, sig->size,
<------><------><------><------><------>builtin_regdb_keys,
<------><------><------><------><------>VERIFYING_UNSPECIFIED_SIGNATURE,
<------><------><------><------><------>NULL, NULL) == 0;
 
<------>release_firmware(sig);
 
<------>return result;
}
 
static void free_regdb_keyring(void)
{
<------>key_put(builtin_regdb_keys);
}
#else
static int load_builtin_regdb_keys(void)
{
<------>return 0;
}
 
static bool regdb_has_valid_signature(const u8 *data, unsigned int size)
{
<------>return true;
}
 
static void free_regdb_keyring(void)
{
}
#endif /* CONFIG_CFG80211_REQUIRE_SIGNED_REGDB */
 
static bool valid_regdb(const u8 *data, unsigned int size)
{
<------>const struct fwdb_header *hdr = (void *)data;
<------>const struct fwdb_country *country;
 
<------>if (size < sizeof(*hdr))
<------><------>return false;
 
<------>if (hdr->magic != cpu_to_be32(FWDB_MAGIC))
<------><------>return false;
 
<------>if (hdr->version != cpu_to_be32(FWDB_VERSION))
<------><------>return false;
 
<------>if (!regdb_has_valid_signature(data, size))
<------><------>return false;
 
<------>country = &hdr->country[0];
<------>while ((u8 *)(country + 1) <= data + size) {
<------><------>if (!country->coll_ptr)
<------><------><------>break;
<------><------>if (!valid_country(data, size, country))
<------><------><------>return false;
<------><------>country++;
<------>}
 
<------>return true;
}
 
static void set_wmm_rule(const struct fwdb_header *db,
<------><------><------> const struct fwdb_country *country,
<------><------><------> const struct fwdb_rule *rule,
<------><------><------> struct ieee80211_reg_rule *rrule)
{
<------>struct ieee80211_wmm_rule *wmm_rule = &rrule->wmm_rule;
<------>struct fwdb_wmm_rule *wmm;
<------>unsigned int i, wmm_ptr;
 
<------>wmm_ptr = be16_to_cpu(rule->wmm_ptr) << 2;
<------>wmm = (void *)((u8 *)db + wmm_ptr);
 
<------>if (!valid_wmm(wmm)) {
<------><------>pr_err("Invalid regulatory WMM rule %u-%u in domain %c%c\n",
<------><------>       be32_to_cpu(rule->start), be32_to_cpu(rule->end),
<------><------>       country->alpha2[0], country->alpha2[1]);
<------><------>return;
<------>}
 
<------>for (i = 0; i < IEEE80211_NUM_ACS; i++) {
<------><------>wmm_rule->client[i].cw_min =
<------><------><------>ecw2cw((wmm->client[i].ecw & 0xf0) >> 4);
<------><------>wmm_rule->client[i].cw_max = ecw2cw(wmm->client[i].ecw & 0x0f);
<------><------>wmm_rule->client[i].aifsn =  wmm->client[i].aifsn;
<------><------>wmm_rule->client[i].cot =
<------><------><------>1000 * be16_to_cpu(wmm->client[i].cot);
<------><------>wmm_rule->ap[i].cw_min = ecw2cw((wmm->ap[i].ecw & 0xf0) >> 4);
<------><------>wmm_rule->ap[i].cw_max = ecw2cw(wmm->ap[i].ecw & 0x0f);
<------><------>wmm_rule->ap[i].aifsn = wmm->ap[i].aifsn;
<------><------>wmm_rule->ap[i].cot = 1000 * be16_to_cpu(wmm->ap[i].cot);
<------>}
 
<------>rrule->has_wmm = true;
}
 
static int __regdb_query_wmm(const struct fwdb_header *db,
<------><------><------>     const struct fwdb_country *country, int freq,
<------><------><------>     struct ieee80211_reg_rule *rrule)
{
<------>unsigned int ptr = be16_to_cpu(country->coll_ptr) << 2;
<------>struct fwdb_collection *coll = (void *)((u8 *)db + ptr);
<------>int i;
 
<------>for (i = 0; i < coll->n_rules; i++) {
<------><------>__be16 *rules_ptr = (void *)((u8 *)coll + ALIGN(coll->len, 2));
<------><------>unsigned int rule_ptr = be16_to_cpu(rules_ptr[i]) << 2;
<------><------>struct fwdb_rule *rule = (void *)((u8 *)db + rule_ptr);
 
<------><------>if (rule->len < offsetofend(struct fwdb_rule, wmm_ptr))
<------><------><------>continue;
 
<------><------>if (freq >= KHZ_TO_MHZ(be32_to_cpu(rule->start)) &&
<------><------>    freq <= KHZ_TO_MHZ(be32_to_cpu(rule->end))) {
<------><------><------>set_wmm_rule(db, country, rule, rrule);
<------><------><------>return 0;
<------><------>}
<------>}
 
<------>return -ENODATA;
}
 
int reg_query_regdb_wmm(char *alpha2, int freq, struct ieee80211_reg_rule *rule)
{
<------>const struct fwdb_header *hdr = regdb;
<------>const struct fwdb_country *country;
 
<------>if (!regdb)
<------><------>return -ENODATA;
 
<------>if (IS_ERR(regdb))
<------><------>return PTR_ERR(regdb);
 
<------>country = &hdr->country[0];
<------>while (country->coll_ptr) {
<------><------>if (alpha2_equal(alpha2, country->alpha2))
<------><------><------>return __regdb_query_wmm(regdb, country, freq, rule);
 
<------><------>country++;
<------>}
 
<------>return -ENODATA;
}
EXPORT_SYMBOL(reg_query_regdb_wmm);
 
static int regdb_query_country(const struct fwdb_header *db,
<------><------><------>       const struct fwdb_country *country)
{
<------>unsigned int ptr = be16_to_cpu(country->coll_ptr) << 2;
<------>struct fwdb_collection *coll = (void *)((u8 *)db + ptr);
<------>struct ieee80211_regdomain *regdom;
<------>unsigned int i;
 
<------>regdom = kzalloc(struct_size(regdom, reg_rules, coll->n_rules),
<------><------><------> GFP_KERNEL);
<------>if (!regdom)
<------><------>return -ENOMEM;
 
<------>regdom->n_reg_rules = coll->n_rules;
<------>regdom->alpha2[0] = country->alpha2[0];
<------>regdom->alpha2[1] = country->alpha2[1];
<------>regdom->dfs_region = coll->dfs_region;
 
<------>for (i = 0; i < regdom->n_reg_rules; i++) {
<------><------>__be16 *rules_ptr = (void *)((u8 *)coll + ALIGN(coll->len, 2));
<------><------>unsigned int rule_ptr = be16_to_cpu(rules_ptr[i]) << 2;
<------><------>struct fwdb_rule *rule = (void *)((u8 *)db + rule_ptr);
<------><------>struct ieee80211_reg_rule *rrule = &regdom->reg_rules[i];
 
<------><------>rrule->freq_range.start_freq_khz = be32_to_cpu(rule->start);
<------><------>rrule->freq_range.end_freq_khz = be32_to_cpu(rule->end);
<------><------>rrule->freq_range.max_bandwidth_khz = be32_to_cpu(rule->max_bw);
 
<------><------>rrule->power_rule.max_antenna_gain = 0;
<------><------>rrule->power_rule.max_eirp = be16_to_cpu(rule->max_eirp);
 
<------><------>rrule->flags = 0;
<------><------>if (rule->flags & FWDB_FLAG_NO_OFDM)
<------><------><------>rrule->flags |= NL80211_RRF_NO_OFDM;
<------><------>if (rule->flags & FWDB_FLAG_NO_OUTDOOR)
<------><------><------>rrule->flags |= NL80211_RRF_NO_OUTDOOR;
<------><------>if (rule->flags & FWDB_FLAG_DFS)
<------><------><------>rrule->flags |= NL80211_RRF_DFS;
<------><------>if (rule->flags & FWDB_FLAG_NO_IR)
<------><------><------>rrule->flags |= NL80211_RRF_NO_IR;
<------><------>if (rule->flags & FWDB_FLAG_AUTO_BW)
<------><------><------>rrule->flags |= NL80211_RRF_AUTO_BW;
 
<------><------>rrule->dfs_cac_ms = 0;
 
<------><------>/* handle optional data */
<------><------>if (rule->len >= offsetofend(struct fwdb_rule, cac_timeout))
<------><------><------>rrule->dfs_cac_ms =
<------><------><------><------>1000 * be16_to_cpu(rule->cac_timeout);
<------><------>if (rule->len >= offsetofend(struct fwdb_rule, wmm_ptr))
<------><------><------>set_wmm_rule(db, country, rule, rrule);
<------>}
 
<------>return reg_schedule_apply(regdom);
}
 
static int query_regdb(const char *alpha2)
{
<------>const struct fwdb_header *hdr = regdb;
<------>const struct fwdb_country *country;
 
<------>ASSERT_RTNL();
 
<------>if (IS_ERR(regdb))
<------><------>return PTR_ERR(regdb);
 
<------>country = &hdr->country[0];
<------>while (country->coll_ptr) {
<------><------>if (alpha2_equal(alpha2, country->alpha2))
<------><------><------>return regdb_query_country(regdb, country);
<------><------>country++;
<------>}
 
<------>return -ENODATA;
}
 
static void regdb_fw_cb(const struct firmware *fw, void *context)
{
<------>int set_error = 0;
<------>bool restore = true;
<------>void *db;
 
<------>if (!fw) {
<------><------>pr_info("failed to load regulatory.db\n");
<------><------>set_error = -ENODATA;
<------>} else if (!valid_regdb(fw->data, fw->size)) {
<------><------>pr_info("loaded regulatory.db is malformed or signature is missing/invalid\n");
<------><------>set_error = -EINVAL;
<------>}
 
<------>rtnl_lock();
<------>if (regdb && !IS_ERR(regdb)) {
<------><------>/* negative case - a bug
<------><------> * positive case - can happen due to race in case of multiple cb's in
<------><------> * queue, due to usage of asynchronous callback
<------><------> *
<------><------> * Either case, just restore and free new db.
<------><------> */
<------>} else if (set_error) {
<------><------>regdb = ERR_PTR(set_error);
<------>} else if (fw) {
<------><------>db = kmemdup(fw->data, fw->size, GFP_KERNEL);
<------><------>if (db) {
<------><------><------>regdb = db;
<------><------><------>restore = context && query_regdb(context);
<------><------>} else {
<------><------><------>restore = true;
<------><------>}
<------>}
 
<------>if (restore)
<------><------>restore_regulatory_settings(true, false);
 
<------>rtnl_unlock();
 
<------>kfree(context);
 
<------>release_firmware(fw);
}
 
static int query_regdb_file(const char *alpha2)
{
<------>ASSERT_RTNL();
 
<------>if (regdb)
<------><------>return query_regdb(alpha2);
 
<------>alpha2 = kmemdup(alpha2, 2, GFP_KERNEL);
<------>if (!alpha2)
<------><------>return -ENOMEM;
 
<------>return request_firmware_nowait(THIS_MODULE, true, "regulatory.db",
<------><------><------><------>       &reg_pdev->dev, GFP_KERNEL,
<------><------><------><------>       (void *)alpha2, regdb_fw_cb);
}
 
int reg_reload_regdb(void)
{
<------>const struct firmware *fw;
<------>void *db;
<------>int err;
 
<------>err = request_firmware(&fw, "regulatory.db", &reg_pdev->dev);
<------>if (err)
<------><------>return err;
 
<------>if (!valid_regdb(fw->data, fw->size)) {
<------><------>err = -ENODATA;
<------><------>goto out;
<------>}
 
<------>db = kmemdup(fw->data, fw->size, GFP_KERNEL);
<------>if (!db) {
<------><------>err = -ENOMEM;
<------><------>goto out;
<------>}
 
<------>rtnl_lock();
<------>if (!IS_ERR_OR_NULL(regdb))
<------><------>kfree(regdb);
<------>regdb = db;
<------>rtnl_unlock();
 
 out:
<------>release_firmware(fw);
<------>return err;
}
 
static bool reg_query_database(struct regulatory_request *request)
{
<------>if (query_regdb_file(request->alpha2) == 0)
<------><------>return true;
 
<------>if (call_crda(request->alpha2) == 0)
<------><------>return true;
 
<------>return false;
}
 
bool reg_is_valid_request(const char *alpha2)
{
<------>struct regulatory_request *lr = get_last_request();
 
<------>if (!lr || lr->processed)
<------><------>return false;
 
<------>return alpha2_equal(lr->alpha2, alpha2);
}
 
static const struct ieee80211_regdomain *reg_get_regdomain(struct wiphy *wiphy)
{
<------>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)
<------><------>return get_wiphy_regdom(wiphy);
 
<------>return get_cfg80211_regdom();
}
 
static unsigned int
reg_get_max_bandwidth_from_range(const struct ieee80211_regdomain *rd,
<------><------><------><------> const struct ieee80211_reg_rule *rule)
{
<------>const struct ieee80211_freq_range *freq_range = &rule->freq_range;
<------>const struct ieee80211_freq_range *freq_range_tmp;
<------>const struct ieee80211_reg_rule *tmp;
<------>u32 start_freq, end_freq, idx, no;
 
<------>for (idx = 0; idx < rd->n_reg_rules; idx++)
<------><------>if (rule == &rd->reg_rules[idx])
<------><------><------>break;
 
<------>if (idx == rd->n_reg_rules)
<------><------>return 0;
 
<------>/* get start_freq */
<------>no = idx;
 
<------>while (no) {
<------><------>tmp = &rd->reg_rules[--no];
<------><------>freq_range_tmp = &tmp->freq_range;
 
<------><------>if (freq_range_tmp->end_freq_khz < freq_range->start_freq_khz)
<------><------><------>break;
 
<------><------>freq_range = freq_range_tmp;
<------>}
 
<------>start_freq = freq_range->start_freq_khz;
 
<------>/* get end_freq */
<------>freq_range = &rule->freq_range;
<------>no = idx;
 
<------>while (no < rd->n_reg_rules - 1) {
<------><------>tmp = &rd->reg_rules[++no];
<------><------>freq_range_tmp = &tmp->freq_range;
 
<------><------>if (freq_range_tmp->start_freq_khz > freq_range->end_freq_khz)
<------><------><------>break;
 
<------><------>freq_range = freq_range_tmp;
<------>}
 
<------>end_freq = freq_range->end_freq_khz;
 
<------>return end_freq - start_freq;
}
 
unsigned int reg_get_max_bandwidth(const struct ieee80211_regdomain *rd,
<------><------><------><------>   const struct ieee80211_reg_rule *rule)
{
<------>unsigned int bw = reg_get_max_bandwidth_from_range(rd, rule);
 
<------>if (rule->flags & NL80211_RRF_NO_160MHZ)
<------><------>bw = min_t(unsigned int, bw, MHZ_TO_KHZ(80));
<------>if (rule->flags & NL80211_RRF_NO_80MHZ)
<------><------>bw = min_t(unsigned int, bw, MHZ_TO_KHZ(40));
 
<------>/*
<------> * HT40+/HT40- limits are handled per-channel. Only limit BW if both
<------> * are not allowed.
<------> */
<------>if (rule->flags & NL80211_RRF_NO_HT40MINUS &&
<------>    rule->flags & NL80211_RRF_NO_HT40PLUS)
<------><------>bw = min_t(unsigned int, bw, MHZ_TO_KHZ(20));
 
<------>return bw;
}
 
/* Sanity check on a regulatory rule */
static bool is_valid_reg_rule(const struct ieee80211_reg_rule *rule)
{
<------>const struct ieee80211_freq_range *freq_range = &rule->freq_range;
<------>u32 freq_diff;
 
<------>if (freq_range->start_freq_khz <= 0 || freq_range->end_freq_khz <= 0)
<------><------>return false;
 
<------>if (freq_range->start_freq_khz > freq_range->end_freq_khz)
<------><------>return false;
 
<------>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)
<------><------>return false;
 
<------>return true;
}
 
static bool is_valid_rd(const struct ieee80211_regdomain *rd)
{
<------>const struct ieee80211_reg_rule *reg_rule = NULL;
<------>unsigned int i;
 
<------>if (!rd->n_reg_rules)
<------><------>return false;
 
<------>if (WARN_ON(rd->n_reg_rules > NL80211_MAX_SUPP_REG_RULES))
<------><------>return false;
 
<------>for (i = 0; i < rd->n_reg_rules; i++) {
<------><------>reg_rule = &rd->reg_rules[i];
<------><------>if (!is_valid_reg_rule(reg_rule))
<------><------><------>return false;
<------>}
 
<------>return true;
}
 
/**
 * freq_in_rule_band - tells us if a frequency is in a frequency band
 * @freq_range: frequency rule we want to query
 * @freq_khz: frequency we are inquiring about
 *
 * This lets us know if a specific frequency rule is or is not relevant to
 * a specific frequency's band. Bands are device specific and artificial
 * definitions (the "2.4 GHz band", the "5 GHz band" and the "60GHz band"),
 * however it is safe for now to assume that a frequency rule should not be
 * part of a frequency's band if the start freq or end freq are off by more
 * than 2 GHz for the 2.4 and 5 GHz bands, and by more than 20 GHz for the
 * 60 GHz band.
 * This resolution can be lowered and should be considered as we add
 * regulatory rule support for other "bands".
 **/
static bool freq_in_rule_band(const struct ieee80211_freq_range *freq_range,
<------><------><------>      u32 freq_khz)
{
#define ONE_GHZ_IN_KHZ	1000000
<------>/*
<------> * From 802.11ad: directional multi-gigabit (DMG):
<------> * Pertaining to operation in a frequency band containing a channel
<------> * with the Channel starting frequency above 45 GHz.
<------> */
<------>u32 limit = freq_khz > 45 * ONE_GHZ_IN_KHZ ?
<------><------><------>20 * ONE_GHZ_IN_KHZ : 2 * ONE_GHZ_IN_KHZ;
<------>if (abs(freq_khz - freq_range->start_freq_khz) <= limit)
<------><------>return true;
<------>if (abs(freq_khz - freq_range->end_freq_khz) <= limit)
<------><------>return true;
<------>return false;
#undef ONE_GHZ_IN_KHZ
}
 
/*
 * 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;
}
 
static void reg_wmm_rules_intersect(const struct ieee80211_wmm_ac *wmm_ac1,
<------><------><------><------>    const struct ieee80211_wmm_ac *wmm_ac2,
<------><------><------><------>    struct ieee80211_wmm_ac *intersect)
{
<------>intersect->cw_min = max_t(u16, wmm_ac1->cw_min, wmm_ac2->cw_min);
<------>intersect->cw_max = max_t(u16, wmm_ac1->cw_max, wmm_ac2->cw_max);
<------>intersect->cot = min_t(u16, wmm_ac1->cot, wmm_ac2->cot);
<------>intersect->aifsn = max_t(u8, wmm_ac1->aifsn, wmm_ac2->aifsn);
}
 
/*
 * Helper for regdom_intersect(), this does the real
 * mathematical intersection fun
 */
static int reg_rules_intersect(const struct ieee80211_regdomain *rd1,
<------><------><------>       const struct ieee80211_regdomain *rd2,
<------><------><------>       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;
<------>const struct ieee80211_power_rule *power_rule1, *power_rule2;
<------>struct ieee80211_power_rule *power_rule;
<------>const struct ieee80211_wmm_rule *wmm_rule1, *wmm_rule2;
<------>struct ieee80211_wmm_rule *wmm_rule;
<------>u32 freq_diff, max_bandwidth1, max_bandwidth2;
 
<------>freq_range1 = &rule1->freq_range;
<------>freq_range2 = &rule2->freq_range;
<------>freq_range = &intersected_rule->freq_range;
 
<------>power_rule1 = &rule1->power_rule;
<------>power_rule2 = &rule2->power_rule;
<------>power_rule = &intersected_rule->power_rule;
 
<------>wmm_rule1 = &rule1->wmm_rule;
<------>wmm_rule2 = &rule2->wmm_rule;
<------>wmm_rule = &intersected_rule->wmm_rule;
 
<------>freq_range->start_freq_khz = max(freq_range1->start_freq_khz,
<------><------><------><------><------> freq_range2->start_freq_khz);
<------>freq_range->end_freq_khz = min(freq_range1->end_freq_khz,
<------><------><------><------>       freq_range2->end_freq_khz);
 
<------>max_bandwidth1 = freq_range1->max_bandwidth_khz;
<------>max_bandwidth2 = freq_range2->max_bandwidth_khz;
 
<------>if (rule1->flags & NL80211_RRF_AUTO_BW)
<------><------>max_bandwidth1 = reg_get_max_bandwidth(rd1, rule1);
<------>if (rule2->flags & NL80211_RRF_AUTO_BW)
<------><------>max_bandwidth2 = reg_get_max_bandwidth(rd2, rule2);
 
<------>freq_range->max_bandwidth_khz = min(max_bandwidth1, max_bandwidth2);
 
<------>intersected_rule->flags = rule1->flags | rule2->flags;
 
<------>/*
<------> * In case NL80211_RRF_AUTO_BW requested for both rules
<------> * set AUTO_BW in intersected rule also. Next we will
<------> * calculate BW correctly in handle_channel function.
<------> * In other case remove AUTO_BW flag while we calculate
<------> * maximum bandwidth correctly and auto calculation is
<------> * not required.
<------> */
<------>if ((rule1->flags & NL80211_RRF_AUTO_BW) &&
<------>    (rule2->flags & NL80211_RRF_AUTO_BW))
<------><------>intersected_rule->flags |= NL80211_RRF_AUTO_BW;
<------>else
<------><------>intersected_rule->flags &= ~NL80211_RRF_AUTO_BW;
 
<------>freq_diff = freq_range->end_freq_khz - freq_range->start_freq_khz;
<------>if (freq_range->max_bandwidth_khz > freq_diff)
<------><------>freq_range->max_bandwidth_khz = freq_diff;
 
<------>power_rule->max_eirp = min(power_rule1->max_eirp,
<------><------>power_rule2->max_eirp);
<------>power_rule->max_antenna_gain = min(power_rule1->max_antenna_gain,
<------><------>power_rule2->max_antenna_gain);
 
<------>intersected_rule->dfs_cac_ms = max(rule1->dfs_cac_ms,
<------><------><------><------><------>   rule2->dfs_cac_ms);
 
<------>if (rule1->has_wmm && rule2->has_wmm) {
<------><------>u8 ac;
 
<------><------>for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
<------><------><------>reg_wmm_rules_intersect(&wmm_rule1->client[ac],
<------><------><------><------><------><------>&wmm_rule2->client[ac],
<------><------><------><------><------><------>&wmm_rule->client[ac]);
<------><------><------>reg_wmm_rules_intersect(&wmm_rule1->ap[ac],
<------><------><------><------><------><------>&wmm_rule2->ap[ac],
<------><------><------><------><------><------>&wmm_rule->ap[ac]);
<------><------>}
 
<------><------>intersected_rule->has_wmm = true;
<------>} else if (rule1->has_wmm) {
<------><------>*wmm_rule = *wmm_rule1;
<------><------>intersected_rule->has_wmm = true;
<------>} else if (rule2->has_wmm) {
<------><------>*wmm_rule = *wmm_rule2;
<------><------>intersected_rule->has_wmm = true;
<------>} else {
<------><------>intersected_rule->has_wmm = false;
<------>}
 
<------>if (!is_valid_reg_rule(intersected_rule))
<------><------>return -EINVAL;
 
<------>return 0;
}
 
/* check whether old rule contains new rule */
static bool rule_contains(struct ieee80211_reg_rule *r1,
<------><------><------>  struct ieee80211_reg_rule *r2)
{
<------>/* for simplicity, currently consider only same flags */
<------>if (r1->flags != r2->flags)
<------><------>return false;
 
<------>/* verify r1 is more restrictive */
<------>if ((r1->power_rule.max_antenna_gain >
<------>     r2->power_rule.max_antenna_gain) ||
<------>    r1->power_rule.max_eirp > r2->power_rule.max_eirp)
<------><------>return false;
 
<------>/* make sure r2's range is contained within r1 */
<------>if (r1->freq_range.start_freq_khz > r2->freq_range.start_freq_khz ||
<------>    r1->freq_range.end_freq_khz < r2->freq_range.end_freq_khz)
<------><------>return false;
 
<------>/* and finally verify that r1.max_bw >= r2.max_bw */
<------>if (r1->freq_range.max_bandwidth_khz <
<------>    r2->freq_range.max_bandwidth_khz)
<------><------>return false;
 
<------>return true;
}
 
/* add or extend current rules. do nothing if rule is already contained */
static void add_rule(struct ieee80211_reg_rule *rule,
<------><------>     struct ieee80211_reg_rule *reg_rules, u32 *n_rules)
{
<------>struct ieee80211_reg_rule *tmp_rule;
<------>int i;
 
<------>for (i = 0; i < *n_rules; i++) {
<------><------>tmp_rule = &reg_rules[i];
<------><------>/* rule is already contained - do nothing */
<------><------>if (rule_contains(tmp_rule, rule))
<------><------><------>return;
 
<------><------>/* extend rule if possible */
<------><------>if (rule_contains(rule, tmp_rule)) {
<------><------><------>memcpy(tmp_rule, rule, sizeof(*rule));
<------><------><------>return;
<------><------>}
<------>}
 
<------>memcpy(&reg_rules[*n_rules], rule, sizeof(*rule));
<------>(*n_rules)++;
}
 
/**
 * regdom_intersect - do the intersection between two regulatory domains
 * @rd1: first regulatory domain
 * @rd2: second regulatory domain
 *
 * Use this function to get the intersection between two regulatory domains.
 * Once completed we will mark the alpha2 for the rd as intersected, "98",
 * as no one single alpha2 can represent this regulatory domain.
 *
 * Returns a pointer to the regulatory domain structure which will hold the
 * 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)
{
<------>int r;
<------>unsigned int x, y;
<------>unsigned int num_rules = 0;
<------>const struct ieee80211_reg_rule *rule1, *rule2;
<------>struct ieee80211_reg_rule intersected_rule;
<------>struct ieee80211_regdomain *rd;
 
<------>if (!rd1 || !rd2)
<------><------>return NULL;
 
<------>/*
<------> * First we get a count of the rules we'll need, then we actually
<------> * build them. This is to so we can malloc() and free() a
<------> * regdomain once. The reason we use reg_rules_intersect() here
<------> * is it will return -EINVAL if the rule computed makes no sense.
<------> * All rules that do check out OK are valid.
<------> */
 
<------>for (x = 0; x < rd1->n_reg_rules; x++) {
<------><------>rule1 = &rd1->reg_rules[x];
<------><------>for (y = 0; y < rd2->n_reg_rules; y++) {
<------><------><------>rule2 = &rd2->reg_rules[y];
<------><------><------>if (!reg_rules_intersect(rd1, rd2, rule1, rule2,
<------><------><------><------><------><------> &intersected_rule))
<------><------><------><------>num_rules++;
<------><------>}
<------>}
 
<------>if (!num_rules)
<------><------>return NULL;
 
<------>rd = kzalloc(struct_size(rd, reg_rules, num_rules), GFP_KERNEL);
<------>if (!rd)
<------><------>return NULL;
 
<------>for (x = 0; x < rd1->n_reg_rules; x++) {
<------><------>rule1 = &rd1->reg_rules[x];
<------><------>for (y = 0; y < rd2->n_reg_rules; y++) {
<------><------><------>rule2 = &rd2->reg_rules[y];
<------><------><------>r = reg_rules_intersect(rd1, rd2, rule1, rule2,
<------><------><------><------><------><------>&intersected_rule);
<------><------><------>/*
<------><------><------> * No need to memset here the intersected rule here as
<------><------><------> * we're not using the stack anymore
<------><------><------> */
<------><------><------>if (r)
<------><------><------><------>continue;
 
<------><------><------>add_rule(&intersected_rule, rd->reg_rules,
<------><------><------><------> &rd->n_reg_rules);
<------><------>}
<------>}
 
<------>rd->alpha2[0] = '9';
<------>rd->alpha2[1] = '8';
<------>rd->dfs_region = reg_intersect_dfs_region(rd1->dfs_region,
<------><------><------><------><------><------>  rd2->dfs_region);
 
<------>return rd;
}
 
/*
 * XXX: add support for the rest of enum nl80211_reg_rule_flags, we may
 * want to just have the channel structure use these
 */
static u32 map_regdom_flags(u32 rd_flags)
{
<------>u32 channel_flags = 0;
<------>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)
<------><------>channel_flags |= IEEE80211_CHAN_NO_OFDM;
<------>if (rd_flags & NL80211_RRF_NO_OUTDOOR)
<------><------>channel_flags |= IEEE80211_CHAN_INDOOR_ONLY;
<------>if (rd_flags & NL80211_RRF_IR_CONCURRENT)
<------><------>channel_flags |= IEEE80211_CHAN_IR_CONCURRENT;
<------>if (rd_flags & NL80211_RRF_NO_HT40MINUS)
<------><------>channel_flags |= IEEE80211_CHAN_NO_HT40MINUS;
<------>if (rd_flags & NL80211_RRF_NO_HT40PLUS)
<------><------>channel_flags |= IEEE80211_CHAN_NO_HT40PLUS;
<------>if (rd_flags & NL80211_RRF_NO_80MHZ)
<------><------>channel_flags |= IEEE80211_CHAN_NO_80MHZ;
<------>if (rd_flags & NL80211_RRF_NO_160MHZ)
<------><------>channel_flags |= IEEE80211_CHAN_NO_160MHZ;
<------>if (rd_flags & NL80211_RRF_NO_HE)
<------><------>channel_flags |= IEEE80211_CHAN_NO_HE;
<------>return channel_flags;
}
 
static const struct ieee80211_reg_rule *
freq_reg_info_regd(u32 center_freq,
<------><------>   const struct ieee80211_regdomain *regd, u32 bw)
{
<------>int i;
<------>bool band_rule_found = false;
<------>bool bw_fits = false;
 
<------>if (!regd)
<------><------>return ERR_PTR(-EINVAL);
 
<------>for (i = 0; i < regd->n_reg_rules; i++) {
<------><------>const struct ieee80211_reg_rule *rr;
<------><------>const struct ieee80211_freq_range *fr = NULL;
 
<------><------>rr = &regd->reg_rules[i];
<------><------>fr = &rr->freq_range;
 
<------><------>/*
<------><------> * We only need to know if one frequency rule was
<------><------> * in center_freq's band, that's enough, so let's
<------><------> * not overwrite it once found
<------><------> */
<------><------>if (!band_rule_found)
<------><------><------>band_rule_found = freq_in_rule_band(fr, center_freq);
 
<------><------>bw_fits = cfg80211_does_bw_fit_range(fr, center_freq, bw);
 
<------><------>if (band_rule_found && bw_fits)
<------><------><------>return rr;
<------>}
 
<------>if (!band_rule_found)
<------><------>return ERR_PTR(-ERANGE);
 
<------>return ERR_PTR(-EINVAL);
}
 
static const struct ieee80211_reg_rule *
__freq_reg_info(struct wiphy *wiphy, u32 center_freq, u32 min_bw)
{
<------>const struct ieee80211_regdomain *regd = reg_get_regdomain(wiphy);
<------>const u32 bws[] = {0, 1, 2, 4, 5, 8, 10, 16, 20};
<------>const struct ieee80211_reg_rule *reg_rule;
<------>int i = ARRAY_SIZE(bws) - 1;
<------>u32 bw;
 
<------>for (bw = MHZ_TO_KHZ(bws[i]); bw >= min_bw; bw = MHZ_TO_KHZ(bws[i--])) {
<------><------>reg_rule = freq_reg_info_regd(center_freq, regd, bw);
<------><------>if (!IS_ERR(reg_rule))
<------><------><------>return reg_rule;
<------>}
 
<------>return reg_rule;
}
 
const struct ieee80211_reg_rule *freq_reg_info(struct wiphy *wiphy,
<------><------><------><------><------>       u32 center_freq)
{
<------>u32 min_bw = center_freq < MHZ_TO_KHZ(1000) ? 1 : 20;
 
<------>return __freq_reg_info(wiphy, center_freq, MHZ_TO_KHZ(min_bw));
}
EXPORT_SYMBOL(freq_reg_info);
 
const char *reg_initiator_name(enum nl80211_reg_initiator initiator)
{
<------>switch (initiator) {
<------>case NL80211_REGDOM_SET_BY_CORE:
<------><------>return "core";
<------>case NL80211_REGDOM_SET_BY_USER:
<------><------>return "user";
<------>case NL80211_REGDOM_SET_BY_DRIVER:
<------><------>return "driver";
<------>case NL80211_REGDOM_SET_BY_COUNTRY_IE:
<------><------>return "country element";
<------>default:
<------><------>WARN_ON(1);
<------><------>return "bug";
<------>}
}
EXPORT_SYMBOL(reg_initiator_name);
 
static uint32_t reg_rule_to_chan_bw_flags(const struct ieee80211_regdomain *regd,
<------><------><------><------><------>  const struct ieee80211_reg_rule *reg_rule,
<------><------><------><------><------>  const struct ieee80211_channel *chan)
{
<------>const struct ieee80211_freq_range *freq_range = NULL;
<------>u32 max_bandwidth_khz, center_freq_khz, bw_flags = 0;
<------>bool is_s1g = chan->band == NL80211_BAND_S1GHZ;
 
<------>freq_range = &reg_rule->freq_range;
 
<------>max_bandwidth_khz = freq_range->max_bandwidth_khz;
<------>center_freq_khz = ieee80211_channel_to_khz(chan);
<------>/* Check if auto calculation requested */
<------>if (reg_rule->flags & NL80211_RRF_AUTO_BW)
<------><------>max_bandwidth_khz = reg_get_max_bandwidth(regd, reg_rule);
 
<------>/* If we get a reg_rule we can assume that at least 5Mhz fit */
<------>if (!cfg80211_does_bw_fit_range(freq_range,
<------><------><------><------><------>center_freq_khz,
<------><------><------><------><------>MHZ_TO_KHZ(10)))
<------><------>bw_flags |= IEEE80211_CHAN_NO_10MHZ;
<------>if (!cfg80211_does_bw_fit_range(freq_range,
<------><------><------><------><------>center_freq_khz,
<------><------><------><------><------>MHZ_TO_KHZ(20)))
<------><------>bw_flags |= IEEE80211_CHAN_NO_20MHZ;
 
<------>if (is_s1g) {
<------><------>/* S1G is strict about non overlapping channels. We can
<------><------> * calculate which bandwidth is allowed per channel by finding
<------><------> * the largest bandwidth which cleanly divides the freq_range.
<------><------> */
<------><------>int edge_offset;
<------><------>int ch_bw = max_bandwidth_khz;
 
<------><------>while (ch_bw) {
<------><------><------>edge_offset = (center_freq_khz - ch_bw / 2) -
<------><------><------><------>      freq_range->start_freq_khz;
<------><------><------>if (edge_offset % ch_bw == 0) {
<------><------><------><------>switch (KHZ_TO_MHZ(ch_bw)) {
<------><------><------><------>case 1:
<------><------><------><------><------>bw_flags |= IEEE80211_CHAN_1MHZ;
<------><------><------><------><------>break;
<------><------><------><------>case 2:
<------><------><------><------><------>bw_flags |= IEEE80211_CHAN_2MHZ;
<------><------><------><------><------>break;
<------><------><------><------>case 4:
<------><------><------><------><------>bw_flags |= IEEE80211_CHAN_4MHZ;
<------><------><------><------><------>break;
<------><------><------><------>case 8:
<------><------><------><------><------>bw_flags |= IEEE80211_CHAN_8MHZ;
<------><------><------><------><------>break;
<------><------><------><------>case 16:
<------><------><------><------><------>bw_flags |= IEEE80211_CHAN_16MHZ;
<------><------><------><------><------>break;
<------><------><------><------>default:
<------><------><------><------><------>/* If we got here, no bandwidths fit on
<------><------><------><------><------> * this frequency, ie. band edge.
<------><------><------><------><------> */
<------><------><------><------><------>bw_flags |= IEEE80211_CHAN_DISABLED;
<------><------><------><------><------>break;
<------><------><------><------>}
<------><------><------><------>break;
<------><------><------>}
<------><------><------>ch_bw /= 2;
<------><------>}
<------>} else {
<------><------>if (max_bandwidth_khz < MHZ_TO_KHZ(10))
<------><------><------>bw_flags |= IEEE80211_CHAN_NO_10MHZ;
<------><------>if (max_bandwidth_khz < MHZ_TO_KHZ(20))
<------><------><------>bw_flags |= IEEE80211_CHAN_NO_20MHZ;
<------><------>if (max_bandwidth_khz < MHZ_TO_KHZ(40))
<------><------><------>bw_flags |= IEEE80211_CHAN_NO_HT40;
<------><------>if (max_bandwidth_khz < MHZ_TO_KHZ(80))
<------><------><------>bw_flags |= IEEE80211_CHAN_NO_80MHZ;
<------><------>if (max_bandwidth_khz < MHZ_TO_KHZ(160))
<------><------><------>bw_flags |= IEEE80211_CHAN_NO_160MHZ;
<------>}
<------>return bw_flags;
}
 
static void handle_channel_single_rule(struct wiphy *wiphy,
<------><------><------><------>       enum nl80211_reg_initiator initiator,
<------><------><------><------>       struct ieee80211_channel *chan,
<------><------><------><------>       u32 flags,
<------><------><------><------>       struct regulatory_request *lr,
<------><------><------><------>       struct wiphy *request_wiphy,
<------><------><------><------>       const struct ieee80211_reg_rule *reg_rule)
{
<------>u32 bw_flags = 0;
<------>const struct ieee80211_power_rule *power_rule = NULL;
<------>const struct ieee80211_regdomain *regd;
 
<------>regd = reg_get_regdomain(wiphy);
 
<------>power_rule = &reg_rule->power_rule;
<------>bw_flags = reg_rule_to_chan_bw_flags(regd, reg_rule, chan);
 
<------>if (lr->initiator == NL80211_REGDOM_SET_BY_DRIVER &&
<------>    request_wiphy && request_wiphy == wiphy &&
<------>    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
<------><------> * settings
<------><------> */
<------><------>chan->flags = chan->orig_flags =
<------><------><------>map_regdom_flags(reg_rule->flags) | bw_flags;
<------><------>chan->max_antenna_gain = chan->orig_mag =
<------><------><------>(int) MBI_TO_DBI(power_rule->max_antenna_gain);
<------><------>chan->max_reg_power = chan->max_power = chan->orig_mpwr =
<------><------><------>(int) MBM_TO_DBM(power_rule->max_eirp);
 
<------><------>if (chan->flags & IEEE80211_CHAN_RADAR) {
<------><------><------>chan->dfs_cac_ms = IEEE80211_DFS_MIN_CAC_TIME_MS;
<------><------><------>if (reg_rule->dfs_cac_ms)
<------><------><------><------>chan->dfs_cac_ms = reg_rule->dfs_cac_ms;
<------><------>}
 
<------><------>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_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->flags & IEEE80211_CHAN_RADAR) {
<------><------>if (reg_rule->dfs_cac_ms)
<------><------><------>chan->dfs_cac_ms = reg_rule->dfs_cac_ms;
<------><------>else
<------><------><------>chan->dfs_cac_ms = IEEE80211_DFS_MIN_CAC_TIME_MS;
<------>}
 
<------>if (chan->orig_mpwr) {
<------><------>/*
<------><------> * 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->regulatory_flags & REGULATORY_COUNTRY_IE_FOLLOW_POWER)
<------><------><------>chan->max_power = chan->max_reg_power;
<------><------>else
<------><------><------>chan->max_power = min(chan->orig_mpwr,
<------><------><------><------><------>      chan->max_reg_power);
<------>} else
<------><------>chan->max_power = chan->max_reg_power;
}
 
static void handle_channel_adjacent_rules(struct wiphy *wiphy,
<------><------><------><------><------>  enum nl80211_reg_initiator initiator,
<------><------><------><------><------>  struct ieee80211_channel *chan,
<------><------><------><------><------>  u32 flags,
<------><------><------><------><------>  struct regulatory_request *lr,
<------><------><------><------><------>  struct wiphy *request_wiphy,
<------><------><------><------><------>  const struct ieee80211_reg_rule *rrule1,
<------><------><------><------><------>  const struct ieee80211_reg_rule *rrule2,
<------><------><------><------><------>  struct ieee80211_freq_range *comb_range)
{
<------>u32 bw_flags1 = 0;
<------>u32 bw_flags2 = 0;
<------>const struct ieee80211_power_rule *power_rule1 = NULL;
<------>const struct ieee80211_power_rule *power_rule2 = NULL;
<------>const struct ieee80211_regdomain *regd;
 
<------>regd = reg_get_regdomain(wiphy);
 
<------>power_rule1 = &rrule1->power_rule;
<------>power_rule2 = &rrule2->power_rule;
<------>bw_flags1 = reg_rule_to_chan_bw_flags(regd, rrule1, chan);
<------>bw_flags2 = reg_rule_to_chan_bw_flags(regd, rrule2, chan);
 
<------>if (lr->initiator == NL80211_REGDOM_SET_BY_DRIVER &&
<------>    request_wiphy && request_wiphy == wiphy &&
<------>    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
<------><------> * settings
<------><------> */
<------><------>chan->flags =
<------><------><------>map_regdom_flags(rrule1->flags) |
<------><------><------>map_regdom_flags(rrule2->flags) |
<------><------><------>bw_flags1 |
<------><------><------>bw_flags2;
<------><------>chan->orig_flags = chan->flags;
<------><------>chan->max_antenna_gain =
<------><------><------>min_t(int, MBI_TO_DBI(power_rule1->max_antenna_gain),
<------><------><------>      MBI_TO_DBI(power_rule2->max_antenna_gain));
<------><------>chan->orig_mag = chan->max_antenna_gain;
<------><------>chan->max_reg_power =
<------><------><------>min_t(int, MBM_TO_DBM(power_rule1->max_eirp),
<------><------><------>      MBM_TO_DBM(power_rule2->max_eirp));
<------><------>chan->max_power = chan->max_reg_power;
<------><------>chan->orig_mpwr = chan->max_reg_power;
 
<------><------>if (chan->flags & IEEE80211_CHAN_RADAR) {
<------><------><------>chan->dfs_cac_ms = IEEE80211_DFS_MIN_CAC_TIME_MS;
<------><------><------>if (rrule1->dfs_cac_ms || rrule2->dfs_cac_ms)
<------><------><------><------>chan->dfs_cac_ms = max_t(unsigned int,
<------><------><------><------><------><------><------> rrule1->dfs_cac_ms,
<------><------><------><------><------><------><------> rrule2->dfs_cac_ms);
<------><------>}
 
<------><------>return;
<------>}
 
<------>chan->dfs_state = NL80211_DFS_USABLE;
<------>chan->dfs_state_entered = jiffies;
 
<------>chan->beacon_found = false;
<------>chan->flags = flags | bw_flags1 | bw_flags2 |
<------><------>      map_regdom_flags(rrule1->flags) |
<------><------>      map_regdom_flags(rrule2->flags);
 
<------>/* reg_rule_to_chan_bw_flags may forbids 10 and forbids 20 MHz
<------> * (otherwise no adj. rule case), recheck therefore
<------> */
<------>if (cfg80211_does_bw_fit_range(comb_range,
<------><------><------><------>       ieee80211_channel_to_khz(chan),
<------><------><------><------>       MHZ_TO_KHZ(10)))
<------><------>chan->flags &= ~IEEE80211_CHAN_NO_10MHZ;
<------>if (cfg80211_does_bw_fit_range(comb_range,
<------><------><------><------>       ieee80211_channel_to_khz(chan),
<------><------><------><------>       MHZ_TO_KHZ(20)))
<------><------>chan->flags &= ~IEEE80211_CHAN_NO_20MHZ;
 
<------>chan->max_antenna_gain =
<------><------>min_t(int, chan->orig_mag,
<------><------>      min_t(int,
<------><------><------>    MBI_TO_DBI(power_rule1->max_antenna_gain),
<------><------><------>    MBI_TO_DBI(power_rule2->max_antenna_gain)));
<------>chan->max_reg_power = min_t(int,
<------><------><------><------>    MBM_TO_DBM(power_rule1->max_eirp),
<------><------><------><------>    MBM_TO_DBM(power_rule2->max_eirp));
 
<------>if (chan->flags & IEEE80211_CHAN_RADAR) {
<------><------>if (rrule1->dfs_cac_ms || rrule2->dfs_cac_ms)
<------><------><------>chan->dfs_cac_ms = max_t(unsigned int,
<------><------><------><------><------><------> rrule1->dfs_cac_ms,
<------><------><------><------><------><------> rrule2->dfs_cac_ms);
<------><------>else
<------><------><------>chan->dfs_cac_ms = IEEE80211_DFS_MIN_CAC_TIME_MS;
<------>}
 
<------>if (chan->orig_mpwr) {
<------><------>/* 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->regulatory_flags & REGULATORY_COUNTRY_IE_FOLLOW_POWER)
<------><------><------>chan->max_power = chan->max_reg_power;
<------><------>else
<------><------><------>chan->max_power = min(chan->orig_mpwr,
<------><------><------><------><------>      chan->max_reg_power);
<------>} else {
<------><------>chan->max_power = chan->max_reg_power;
<------>}
}
 
/* 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).
 */
static void handle_channel(struct wiphy *wiphy,
<------><------><------>   enum nl80211_reg_initiator initiator,
<------><------><------>   struct ieee80211_channel *chan)
{
<------>const u32 orig_chan_freq = ieee80211_channel_to_khz(chan);
<------>struct regulatory_request *lr = get_last_request();
<------>struct wiphy *request_wiphy = wiphy_idx_to_wiphy(lr->wiphy_idx);
<------>const struct ieee80211_reg_rule *rrule = NULL;
<------>const struct ieee80211_reg_rule *rrule1 = NULL;
<------>const struct ieee80211_reg_rule *rrule2 = NULL;
 
<------>u32 flags = chan->orig_flags;
 
<------>rrule = freq_reg_info(wiphy, orig_chan_freq);
<------>if (IS_ERR(rrule)) {
<------><------>/* check for adjacent match, therefore get rules for
<------><------> * chan - 20 MHz and chan + 20 MHz and test
<------><------> * if reg rules are adjacent
<------><------> */
<------><------>rrule1 = freq_reg_info(wiphy,
<------><------><------><------>       orig_chan_freq - MHZ_TO_KHZ(20));
<------><------>rrule2 = freq_reg_info(wiphy,
<------><------><------><------>       orig_chan_freq + MHZ_TO_KHZ(20));
<------><------>if (!IS_ERR(rrule1) && !IS_ERR(rrule2)) {
<------><------><------>struct ieee80211_freq_range comb_range;
 
<------><------><------>if (rrule1->freq_range.end_freq_khz !=
<------><------><------>    rrule2->freq_range.start_freq_khz)
<------><------><------><------>goto disable_chan;
 
<------><------><------>comb_range.start_freq_khz =
<------><------><------><------>rrule1->freq_range.start_freq_khz;
<------><------><------>comb_range.end_freq_khz =
<------><------><------><------>rrule2->freq_range.end_freq_khz;
<------><------><------>comb_range.max_bandwidth_khz =
<------><------><------><------>min_t(u32,
<------><------><------><------>      rrule1->freq_range.max_bandwidth_khz,
<------><------><------><------>      rrule2->freq_range.max_bandwidth_khz);
 
<------><------><------>if (!cfg80211_does_bw_fit_range(&comb_range,
<------><------><------><------><------><------><------>orig_chan_freq,
<------><------><------><------><------><------><------>MHZ_TO_KHZ(20)))
<------><------><------><------>goto disable_chan;
 
<------><------><------>handle_channel_adjacent_rules(wiphy, initiator, chan,
<------><------><------><------><------><------>      flags, lr, request_wiphy,
<------><------><------><------><------><------>      rrule1, rrule2,
<------><------><------><------><------><------>      &comb_range);
<------><------><------>return;
<------><------>}
 
disable_chan:
<------><------>/* We will disable all channels that do not match our
<------><------> * received regulatory rule unless the hint is coming
<------><------> * from a Country IE and the Country IE had no information
<------><------> * about a band. The IEEE 802.11 spec allows for an AP
<------><------> * to send only a subset of the regulatory rules allowed,
<------><------> * so an AP in the US that only supports 2.4 GHz may only send
<------><------> * a country IE with information for the 2.4 GHz band
<------><------> * while 5 GHz is still supported.
<------><------> */
<------><------>if (initiator == NL80211_REGDOM_SET_BY_COUNTRY_IE &&
<------><------>    PTR_ERR(rrule) == -ERANGE)
<------><------><------>return;
 
<------><------>if (lr->initiator == NL80211_REGDOM_SET_BY_DRIVER &&
<------><------>    request_wiphy && request_wiphy == wiphy &&
<------><------>    request_wiphy->regulatory_flags & REGULATORY_STRICT_REG) {
<------><------><------>pr_debug("Disabling freq %d.%03d MHz for good\n",
<------><------><------><------> chan->center_freq, chan->freq_offset);
<------><------><------>chan->orig_flags |= IEEE80211_CHAN_DISABLED;
<------><------><------>chan->flags = chan->orig_flags;
<------><------>} else {
<------><------><------>pr_debug("Disabling freq %d.%03d MHz\n",
<------><------><------><------> chan->center_freq, chan->freq_offset);
<------><------><------>chan->flags |= IEEE80211_CHAN_DISABLED;
<------><------>}
<------><------>return;
<------>}
 
<------>handle_channel_single_rule(wiphy, initiator, chan, flags, lr,
<------><------><------><------>   request_wiphy, rrule);
}
 
static void handle_band(struct wiphy *wiphy,
<------><------><------>enum nl80211_reg_initiator initiator,
<------><------><------>struct ieee80211_supported_band *sband)
{
<------>unsigned int i;
 
<------>if (!sband)
<------><------>return;
 
<------>for (i = 0; i < sband->n_channels; 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;
<------>return request->user_reg_hint_type == NL80211_USER_REG_HINT_CELL_BASE;
}
 
bool reg_last_request_cell_base(void)
{
<------>return reg_request_cell_base(get_last_request());
}
 
#ifdef CONFIG_CFG80211_REG_CELLULAR_HINTS
/* Core specific check */
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 REG_REQ_IGNORE;
 
<------>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)
{
<------>return !(wiphy->features & NL80211_FEATURE_CELL_BASE_REG_HINTS);
}
#else
static enum reg_request_treatment
reg_ignore_cell_hint(struct regulatory_request *pending_request)
{
<------>return REG_REQ_IGNORE;
}
 
static bool reg_dev_ignore_cell_hint(struct wiphy *wiphy)
{
<------>return true;
}
#endif
 
static bool wiphy_strict_alpha2_regd(struct wiphy *wiphy)
{
<------>if (wiphy->regulatory_flags & REGULATORY_STRICT_REG &&
<------>    !(wiphy->regulatory_flags & REGULATORY_CUSTOM_REG))
<------><------>return true;
<------>return false;
}
 
static bool ignore_reg_update(struct wiphy *wiphy,
<------><------><------>      enum nl80211_reg_initiator initiator)
{
<------>struct regulatory_request *lr = get_last_request();
 
<------>if (wiphy->regulatory_flags & REGULATORY_WIPHY_SELF_MANAGED)
<------><------>return true;
 
<------>if (!lr) {
<------><------>pr_debug("Ignoring regulatory request set by %s since last_request is not set\n",
<------><------><------> reg_initiator_name(initiator));
<------><------>return true;
<------>}
 
<------>if (initiator == NL80211_REGDOM_SET_BY_CORE &&
<------>    wiphy->regulatory_flags & REGULATORY_CUSTOM_REG) {
<------><------>pr_debug("Ignoring regulatory request set by %s since the driver uses its own custom regulatory domain\n",
<------><------><------> reg_initiator_name(initiator));
<------><------>return true;
<------>}
 
<------>/*
<------> * wiphy->regd will be set once the device has its own
<------> * desired regulatory domain set
<------> */
<------>if (wiphy_strict_alpha2_regd(wiphy) && !wiphy->regd &&
<------>    initiator != NL80211_REGDOM_SET_BY_COUNTRY_IE &&
<------>    !is_world_regdom(lr->alpha2)) {
<------><------>pr_debug("Ignoring regulatory request set by %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(lr))
<------><------>return reg_dev_ignore_cell_hint(wiphy);
 
<------>return false;
}
 
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->regulatory_flags & REGULATORY_CUSTOM_REG)
<------><------>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;
<------>struct ieee80211_channel *chan;
<------>bool channel_changed = false;
<------>struct ieee80211_channel chan_before;
 
<------>sband = wiphy->bands[reg_beacon->chan.band];
<------>chan = &sband->channels[chan_idx];
 
<------>if (likely(!ieee80211_channel_equal(chan, &reg_beacon->chan)))
<------><------>return;
 
<------>if (chan->beacon_found)
<------><------>return;
 
<------>chan->beacon_found = true;
 
<------>if (!reg_is_world_roaming(wiphy))
<------><------>return;
 
<------>if (wiphy->regulatory_flags & REGULATORY_DISABLE_BEACON_HINTS)
<------><------>return;
 
<------>chan_before = *chan;
 
<------>if (chan->flags & IEEE80211_CHAN_NO_IR) {
<------><------>chan->flags &= ~IEEE80211_CHAN_NO_IR;
<------><------>channel_changed = true;
<------>}
 
<------>if (channel_changed)
<------><------>nl80211_send_beacon_hint_event(wiphy, &chan_before, chan);
}
 
/*
 * Called when a scan on a wiphy finds a beacon on
 * new channel
 */
static void wiphy_update_new_beacon(struct wiphy *wiphy,
<------><------><------><------>    struct reg_beacon *reg_beacon)
{
<------>unsigned int i;
<------>struct ieee80211_supported_band *sband;
 
<------>if (!wiphy->bands[reg_beacon->chan.band])
<------><------>return;
 
<------>sband = wiphy->bands[reg_beacon->chan.band];
 
<------>for (i = 0; i < sband->n_channels; i++)
<------><------>handle_reg_beacon(wiphy, i, reg_beacon);
}
 
/*
 * Called upon reg changes or a new wiphy is added
 */
static void wiphy_update_beacon_reg(struct wiphy *wiphy)
{
<------>unsigned int i;
<------>struct ieee80211_supported_band *sband;
<------>struct reg_beacon *reg_beacon;
 
<------>list_for_each_entry(reg_beacon, &reg_beacon_list, list) {
<------><------>if (!wiphy->bands[reg_beacon->chan.band])
<------><------><------>continue;
<------><------>sband = wiphy->bands[reg_beacon->chan.band];
<------><------>for (i = 0; i < sband->n_channels; i++)
<------><------><------>handle_reg_beacon(wiphy, i, reg_beacon);
<------>}
}
 
/* Reap the advantages of previously found beacons */
static void reg_process_beacons(struct wiphy *wiphy)
{
<------>/*
<------> * Means we are just firing up cfg80211, so no beacons would
<------> * have been processed yet.
<------> */
<------>if (!last_request)
<------><------>return;
<------>wiphy_update_beacon_reg(wiphy);
}
 
static bool is_ht40_allowed(struct ieee80211_channel *chan)
{
<------>if (!chan)
<------><------>return false;
<------>if (chan->flags & IEEE80211_CHAN_DISABLED)
<------><------>return false;
<------>/* This would happen when regulatory rules disallow HT40 completely */
<------>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,
<------><------><------><------><------> struct ieee80211_channel *channel)
{
<------>struct ieee80211_supported_band *sband = wiphy->bands[channel->band];
<------>struct ieee80211_channel *channel_before = NULL, *channel_after = NULL;
<------>const struct ieee80211_regdomain *regd;
<------>unsigned int i;
<------>u32 flags;
 
<------>if (!is_ht40_allowed(channel)) {
<------><------>channel->flags |= IEEE80211_CHAN_NO_HT40;
<------><------>return;
<------>}
 
<------>/*
<------> * We need to ensure the extension channels exist to
<------> * be able to use HT40- or HT40+, this finds them (or not)
<------> */
<------>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))
<------><------><------>channel_after = c;
<------>}
 
<------>flags = 0;
<------>regd = get_wiphy_regdom(wiphy);
<------>if (regd) {
<------><------>const struct ieee80211_reg_rule *reg_rule =
<------><------><------>freq_reg_info_regd(MHZ_TO_KHZ(channel->center_freq),
<------><------><------><------><------>   regd, MHZ_TO_KHZ(20));
 
<------><------>if (!IS_ERR(reg_rule))
<------><------><------>flags = reg_rule->flags;
<------>}
 
<------>/*
<------> * Please note that this assumes target bandwidth is 20 MHz,
<------> * if that ever changes we also need to change the below logic
<------> * to include that as well.
<------> */
<------>if (!is_ht40_allowed(channel_before) ||
<------>    flags & NL80211_RRF_NO_HT40MINUS)
<------><------>channel->flags |= IEEE80211_CHAN_NO_HT40MINUS;
<------>else
<------><------>channel->flags &= ~IEEE80211_CHAN_NO_HT40MINUS;
 
<------>if (!is_ht40_allowed(channel_after) ||
<------>    flags & NL80211_RRF_NO_HT40PLUS)
<------><------>channel->flags |= IEEE80211_CHAN_NO_HT40PLUS;
<------>else
<------><------>channel->flags &= ~IEEE80211_CHAN_NO_HT40PLUS;
}
 
static void reg_process_ht_flags_band(struct wiphy *wiphy,
<------><------><------><------>      struct ieee80211_supported_band *sband)
{
<------>unsigned int i;
 
<------>if (!sband)
<------><------>return;
 
<------>for (i = 0; i < sband->n_channels; i++)
<------><------>reg_process_ht_flags_channel(wiphy, &sband->channels[i]);
}
 
static void reg_process_ht_flags(struct wiphy *wiphy)
{
<------>enum nl80211_band band;
 
<------>if (!wiphy)
<------><------>return;
 
<------>for (band = 0; band < NUM_NL80211_BANDS; band++)
<------><------>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 bool reg_wdev_chan_valid(struct wiphy *wiphy, struct wireless_dev *wdev)
{
<------>struct cfg80211_chan_def chandef = {};
<------>struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
<------>enum nl80211_iftype iftype;
 
<------>wdev_lock(wdev);
<------>iftype = wdev->iftype;
 
<------>/* make sure the interface is active */
<------>if (!wdev->netdev || !netif_running(wdev->netdev))
<------><------>goto wdev_inactive_unlock;
 
<------>switch (iftype) {
<------>case NL80211_IFTYPE_AP:
<------>case NL80211_IFTYPE_P2P_GO:
<------><------>if (!wdev->beacon_interval)
<------><------><------>goto wdev_inactive_unlock;
<------><------>chandef = wdev->chandef;
<------><------>break;
<------>case NL80211_IFTYPE_ADHOC:
<------><------>if (!wdev->ssid_len)
<------><------><------>goto wdev_inactive_unlock;
<------><------>chandef = wdev->chandef;
<------><------>break;
<------>case NL80211_IFTYPE_STATION:
<------>case NL80211_IFTYPE_P2P_CLIENT:
<------><------>if (!wdev->current_bss ||
<------><------>    !wdev->current_bss->pub.channel)
<------><------><------>goto wdev_inactive_unlock;
 
<------><------>if (!rdev->ops->get_channel ||
<------><------>    rdev_get_channel(rdev, wdev, &chandef))
<------><------><------>cfg80211_chandef_create(&chandef,
<------><------><------><------><------><------>wdev->current_bss->pub.channel,
<------><------><------><------><------><------>NL80211_CHAN_NO_HT);
<------><------>break;
<------>case NL80211_IFTYPE_MONITOR:
<------>case NL80211_IFTYPE_AP_VLAN:
<------>case NL80211_IFTYPE_P2P_DEVICE:
<------><------>/* no enforcement required */
<------><------>break;
<------>default:
<------><------>/* others not implemented for now */
<------><------>WARN_ON(1);
<------><------>break;
<------>}
 
<------>wdev_unlock(wdev);
 
<------>switch (iftype) {
<------>case NL80211_IFTYPE_AP:
<------>case NL80211_IFTYPE_P2P_GO:
<------>case NL80211_IFTYPE_ADHOC:
<------><------>return cfg80211_reg_can_beacon_relax(wiphy, &chandef, iftype);
<------>case NL80211_IFTYPE_STATION:
<------>case NL80211_IFTYPE_P2P_CLIENT:
<------><------>return cfg80211_chandef_usable(wiphy, &chandef,
<------><------><------><------><------>       IEEE80211_CHAN_DISABLED);
<------>default:
<------><------>break;
<------>}
 
<------>return true;
 
wdev_inactive_unlock:
<------>wdev_unlock(wdev);
<------>return true;
}
 
static void reg_leave_invalid_chans(struct wiphy *wiphy)
{
<------>struct wireless_dev *wdev;
<------>struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
 
<------>ASSERT_RTNL();
 
<------>list_for_each_entry(wdev, &rdev->wiphy.wdev_list, list)
<------><------>if (!reg_wdev_chan_valid(wiphy, wdev))
<------><------><------>cfg80211_leave(rdev, wdev);
}
 
static void reg_check_chans_work(struct work_struct *work)
{
<------>struct cfg80211_registered_device *rdev;
 
<------>pr_debug("Verifying active interfaces after reg change\n");
<------>rtnl_lock();
 
<------>list_for_each_entry(rdev, &cfg80211_rdev_list, list)
<------><------>if (!(rdev->wiphy.regulatory_flags &
<------><------>      REGULATORY_IGNORE_STALE_KICKOFF))
<------><------><------>reg_leave_invalid_chans(&rdev->wiphy);
 
<------>rtnl_unlock();
}
 
static void reg_check_channels(void)
{
<------>/*
<------> * Give usermode a chance to do something nicer (move to another
<------> * channel, orderly disconnection), before forcing a disconnection.
<------> */
<------>mod_delayed_work(system_power_efficient_wq,
<------><------><------> &reg_check_chans,
<------><------><------> msecs_to_jiffies(REG_ENFORCE_GRACE_MS));
}
 
static void wiphy_update_regulatory(struct wiphy *wiphy,
<------><------><------><------>    enum nl80211_reg_initiator initiator)
{
<------>enum nl80211_band band;
<------>struct regulatory_request *lr = get_last_request();
 
<------>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 &&
<------><------>    !(wiphy->regulatory_flags &
<------><------>      REGULATORY_WIPHY_SELF_MANAGED))
<------><------><------>reg_call_notifier(wiphy, lr);
<------><------>return;
<------>}
 
<------>lr->dfs_region = get_cfg80211_regdom()->dfs_region;
 
<------>for (band = 0; band < NUM_NL80211_BANDS; band++)
<------><------>handle_band(wiphy, initiator, wiphy->bands[band]);
 
<------>reg_process_beacons(wiphy);
<------>reg_process_ht_flags(wiphy);
<------>reg_call_notifier(wiphy, lr);
}
 
static void update_all_wiphy_regulatory(enum nl80211_reg_initiator initiator)
{
<------>struct cfg80211_registered_device *rdev;
<------>struct wiphy *wiphy;
 
<------>ASSERT_RTNL();
 
<------>list_for_each_entry(rdev, &cfg80211_rdev_list, list) {
<------><------>wiphy = &rdev->wiphy;
<------><------>wiphy_update_regulatory(wiphy, initiator);
<------>}
 
<------>reg_check_channels();
}
 
static void handle_channel_custom(struct wiphy *wiphy,
<------><------><------><------>  struct ieee80211_channel *chan,
<------><------><------><------>  const struct ieee80211_regdomain *regd,
<------><------><------><------>  u32 min_bw)
{
<------>u32 bw_flags = 0;
<------>const struct ieee80211_reg_rule *reg_rule = NULL;
<------>const struct ieee80211_power_rule *power_rule = NULL;
<------>u32 bw, center_freq_khz;
 
<------>center_freq_khz = ieee80211_channel_to_khz(chan);
<------>for (bw = MHZ_TO_KHZ(20); bw >= min_bw; bw = bw / 2) {
<------><------>reg_rule = freq_reg_info_regd(center_freq_khz, regd, bw);
<------><------>if (!IS_ERR(reg_rule))
<------><------><------>break;
<------>}
 
<------>if (IS_ERR_OR_NULL(reg_rule)) {
<------><------>pr_debug("Disabling freq %d.%03d MHz as custom regd has no rule that fits it\n",
<------><------><------> chan->center_freq, chan->freq_offset);
<------><------>if (wiphy->regulatory_flags & REGULATORY_WIPHY_SELF_MANAGED) {
<------><------><------>chan->flags |= IEEE80211_CHAN_DISABLED;
<------><------>} else {
<------><------><------>chan->orig_flags |= IEEE80211_CHAN_DISABLED;
<------><------><------>chan->flags = chan->orig_flags;
<------><------>}
<------><------>return;
<------>}
 
<------>power_rule = &reg_rule->power_rule;
<------>bw_flags = reg_rule_to_chan_bw_flags(regd, reg_rule, chan);
 
<------>chan->dfs_state_entered = jiffies;
<------>chan->dfs_state = NL80211_DFS_USABLE;
 
<------>chan->beacon_found = false;
 
<------>if (wiphy->regulatory_flags & REGULATORY_WIPHY_SELF_MANAGED)
<------><------>chan->flags = chan->orig_flags | bw_flags |
<------><------><------>      map_regdom_flags(reg_rule->flags);
<------>else
<------><------>chan->flags |= map_regdom_flags(reg_rule->flags) | bw_flags;
 
<------>chan->max_antenna_gain = (int) MBI_TO_DBI(power_rule->max_antenna_gain);
<------>chan->max_reg_power = chan->max_power =
<------><------>(int) MBM_TO_DBM(power_rule->max_eirp);
 
<------>if (chan->flags & IEEE80211_CHAN_RADAR) {
<------><------>if (reg_rule->dfs_cac_ms)
<------><------><------>chan->dfs_cac_ms = reg_rule->dfs_cac_ms;
<------><------>else
<------><------><------>chan->dfs_cac_ms = IEEE80211_DFS_MIN_CAC_TIME_MS;
<------>}
 
<------>chan->max_power = chan->max_reg_power;
}
 
static void handle_band_custom(struct wiphy *wiphy,
<------><------><------>       struct ieee80211_supported_band *sband,
<------><------><------>       const struct ieee80211_regdomain *regd)
{
<------>unsigned int i;
 
<------>if (!sband)
<------><------>return;
 
<------>/*
<------> * We currently assume that you always want at least 20 MHz,
<------> * otherwise channel 12 might get enabled if this rule is
<------> * compatible to US, which permits 2402 - 2472 MHz.
<------> */
<------>for (i = 0; i < sband->n_channels; i++)
<------><------>handle_channel_custom(wiphy, &sband->channels[i], regd,
<------><------><------><------>      MHZ_TO_KHZ(20));
}
 
/* Used by drivers prior to wiphy registration */
void wiphy_apply_custom_regulatory(struct wiphy *wiphy,
<------><------><------><------>   const struct ieee80211_regdomain *regd)
{
<------>enum nl80211_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 < NUM_NL80211_BANDS; band++) {
<------><------>if (!wiphy->bands[band])
<------><------><------>continue;
<------><------>handle_band_custom(wiphy, wiphy->bands[band], regd);
<------><------>bands_set++;
<------>}
 
<------>/*
<------> * no point in calling this if it won't have any effect
<------> * on your device's supported bands.
<------> */
<------>WARN_ON(!bands_set);
}
EXPORT_SYMBOL(wiphy_apply_custom_regulatory);
 
static void reg_set_request_processed(void)
{
<------>bool need_more_processing = false;
<------>struct regulatory_request *lr = get_last_request();
 
<------>lr->processed = true;
 
<------>spin_lock(&reg_requests_lock);
<------>if (!list_empty(&reg_requests_list))
<------><------>need_more_processing = true;
<------>spin_unlock(&reg_requests_lock);
 
<------>cancel_crda_timeout();
 
<------>if (need_more_processing)
<------><------>schedule_work(&reg_work);
}
 
/**
 * reg_process_hint_core - process core regulatory requests
 * @core_request: a pending core regulatory request
 *
 * The wireless subsystem can use this function to process
 * a regulatory request issued by the regulatory core.
 */
static enum reg_request_treatment
reg_process_hint_core(struct regulatory_request *core_request)
{
<------>if (reg_query_database(core_request)) {
<------><------>core_request->intersect = false;
<------><------>core_request->processed = false;
<------><------>reg_update_last_request(core_request);
<------><------>return REG_REQ_OK;
<------>}
 
<------>return REG_REQ_IGNORE;
}
 
static enum reg_request_treatment
__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;
<------>/*
<------> * 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 (!regdom_changes(user_request->alpha2))
<------><------>return REG_REQ_ALREADY_SET;
 
<------>return REG_REQ_OK;
}
 
/**
 * 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.
 */
static enum reg_request_treatment
reg_process_hint_user(struct regulatory_request *user_request)
{
<------>enum reg_request_treatment treatment;
 
<------>treatment = __reg_process_hint_user(user_request);
<------>if (treatment == REG_REQ_IGNORE ||
<------>    treatment == REG_REQ_ALREADY_SET)
<------><------>return REG_REQ_IGNORE;
 
<------>user_request->intersect = treatment == REG_REQ_INTERSECT;
<------>user_request->processed = false;
 
<------>if (reg_query_database(user_request)) {
<------><------>reg_update_last_request(user_request);
<------><------>user_alpha2[0] = user_request->alpha2[0];
<------><------>user_alpha2[1] = user_request->alpha2[1];
<------><------>return REG_REQ_OK;
<------>}
 
<------>return REG_REQ_IGNORE;
}
 
static enum reg_request_treatment
__reg_process_hint_driver(struct regulatory_request *driver_request)
{
<------>struct regulatory_request *lr = get_last_request();
 
<------>if (lr->initiator == NL80211_REGDOM_SET_BY_CORE) {
<------><------>if (regdom_changes(driver_request->alpha2))
<------><------><------>return REG_REQ_OK;
<------><------>return REG_REQ_ALREADY_SET;
<------>}
 
<------>/*
<------> * 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;
 
<------>return REG_REQ_INTERSECT;
}
 
/**
 * reg_process_hint_driver - process driver regulatory requests
 * @wiphy: the wireless device for the regulatory request
 * @driver_request: a pending driver regulatory request
 *
 * 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
reg_process_hint_driver(struct wiphy *wiphy,
<------><------><------>struct regulatory_request *driver_request)
{
<------>const struct ieee80211_regdomain *regd, *tmp;
<------>enum reg_request_treatment treatment;
 
<------>treatment = __reg_process_hint_driver(driver_request);
 
<------>switch (treatment) {
<------>case REG_REQ_OK:
<------><------>break;
<------>case REG_REQ_IGNORE:
<------><------>return REG_REQ_IGNORE;
<------>case REG_REQ_INTERSECT:
<------>case REG_REQ_ALREADY_SET:
<------><------>regd = reg_copy_regd(get_cfg80211_regdom());
<------><------>if (IS_ERR(regd))
<------><------><------>return REG_REQ_IGNORE;
 
<------><------>tmp = get_wiphy_regdom(wiphy);
<------><------>rcu_assign_pointer(wiphy->regd, regd);
<------><------>rcu_free_regdom(tmp);
<------>}
 
 
<------>driver_request->intersect = treatment == REG_REQ_INTERSECT;
<------>driver_request->processed = false;
 
<------>/*
<------> * 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_update_last_request(driver_request);
<------><------>reg_set_request_processed();
<------><------>return REG_REQ_ALREADY_SET;
<------>}
 
<------>if (reg_query_database(driver_request)) {
<------><------>reg_update_last_request(driver_request);
<------><------>return REG_REQ_OK;
<------>}
 
<------>return REG_REQ_IGNORE;
}
 
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 (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;
<------>}
 
<------>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) {
<------><------>/*
<------><------> * 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(country_ie_request->alpha2))
<------><------><------>return REG_REQ_IGNORE;
<------><------>return REG_REQ_ALREADY_SET;
<------>}
 
<------>if (regdom_changes(country_ie_request->alpha2))
<------><------>return REG_REQ_OK;
<------>return REG_REQ_ALREADY_SET;
}
 
/**
 * reg_process_hint_country_ie - process regulatory requests from country IEs
 * @wiphy: the wireless device for the regulatory request
 * @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:
<------><------>return REG_REQ_IGNORE;
<------>case REG_REQ_ALREADY_SET:
<------><------>reg_free_request(country_ie_request);
<------><------>return REG_REQ_ALREADY_SET;
<------>case REG_REQ_INTERSECT:
<------><------>/*
<------><------> * This doesn't happen yet, not sure we
<------><------> * ever want to support it for this case.
<------><------> */
<------><------>WARN_ONCE(1, "Unexpected intersection for country elements");
<------><------>return REG_REQ_IGNORE;
<------>}
 
<------>country_ie_request->intersect = false;
<------>country_ie_request->processed = false;
 
<------>if (reg_query_database(country_ie_request)) {
<------><------>reg_update_last_request(country_ie_request);
<------><------>return REG_REQ_OK;
<------>}
 
<------>return REG_REQ_IGNORE;
}
 
bool reg_dfs_domain_same(struct wiphy *wiphy1, struct wiphy *wiphy2)
{
<------>const struct ieee80211_regdomain *wiphy1_regd = NULL;
<------>const struct ieee80211_regdomain *wiphy2_regd = NULL;
<------>const struct ieee80211_regdomain *cfg80211_regd = NULL;
<------>bool dfs_domain_same;
 
<------>rcu_read_lock();
 
<------>cfg80211_regd = rcu_dereference(cfg80211_regdomain);
<------>wiphy1_regd = rcu_dereference(wiphy1->regd);
<------>if (!wiphy1_regd)
<------><------>wiphy1_regd = cfg80211_regd;
 
<------>wiphy2_regd = rcu_dereference(wiphy2->regd);
<------>if (!wiphy2_regd)
<------><------>wiphy2_regd = cfg80211_regd;
 
<------>dfs_domain_same = wiphy1_regd->dfs_region == wiphy2_regd->dfs_region;
 
<------>rcu_read_unlock();
 
<------>return dfs_domain_same;
}
 
static void reg_copy_dfs_chan_state(struct ieee80211_channel *dst_chan,
<------><------><------><------>    struct ieee80211_channel *src_chan)
{
<------>if (!(dst_chan->flags & IEEE80211_CHAN_RADAR) ||
<------>    !(src_chan->flags & IEEE80211_CHAN_RADAR))
<------><------>return;
 
<------>if (dst_chan->flags & IEEE80211_CHAN_DISABLED ||
<------>    src_chan->flags & IEEE80211_CHAN_DISABLED)
<------><------>return;
 
<------>if (src_chan->center_freq == dst_chan->center_freq &&
<------>    dst_chan->dfs_state == NL80211_DFS_USABLE) {
<------><------>dst_chan->dfs_state = src_chan->dfs_state;
<------><------>dst_chan->dfs_state_entered = src_chan->dfs_state_entered;
<------>}
}
 
static void wiphy_share_dfs_chan_state(struct wiphy *dst_wiphy,
<------><------><------><------>       struct wiphy *src_wiphy)
{
<------>struct ieee80211_supported_band *src_sband, *dst_sband;
<------>struct ieee80211_channel *src_chan, *dst_chan;
<------>int i, j, band;
 
<------>if (!reg_dfs_domain_same(dst_wiphy, src_wiphy))
<------><------>return;
 
<------>for (band = 0; band < NUM_NL80211_BANDS; band++) {
<------><------>dst_sband = dst_wiphy->bands[band];
<------><------>src_sband = src_wiphy->bands[band];
<------><------>if (!dst_sband || !src_sband)
<------><------><------>continue;
 
<------><------>for (i = 0; i < dst_sband->n_channels; i++) {
<------><------><------>dst_chan = &dst_sband->channels[i];
<------><------><------>for (j = 0; j < src_sband->n_channels; j++) {
<------><------><------><------>src_chan = &src_sband->channels[j];
<------><------><------><------>reg_copy_dfs_chan_state(dst_chan, src_chan);
<------><------><------>}
<------><------>}
<------>}
}
 
static void wiphy_all_share_dfs_chan_state(struct wiphy *wiphy)
{
<------>struct cfg80211_registered_device *rdev;
 
<------>ASSERT_RTNL();
 
<------>list_for_each_entry(rdev, &cfg80211_rdev_list, list) {
<------><------>if (wiphy == &rdev->wiphy)
<------><------><------>continue;
<------><------>wiphy_share_dfs_chan_state(wiphy, &rdev->wiphy);
<------>}
}
 
/* This processes *all* regulatory hints */
static void reg_process_hint(struct regulatory_request *reg_request)
{
<------>struct wiphy *wiphy = NULL;
<------>enum reg_request_treatment treatment;
<------>enum nl80211_reg_initiator initiator = reg_request->initiator;
 
<------>if (reg_request->wiphy_idx != WIPHY_IDX_INVALID)
<------><------>wiphy = wiphy_idx_to_wiphy(reg_request->wiphy_idx);
 
<------>switch (initiator) {
<------>case NL80211_REGDOM_SET_BY_CORE:
<------><------>treatment = reg_process_hint_core(reg_request);
<------><------>break;
<------>case NL80211_REGDOM_SET_BY_USER:
<------><------>treatment = reg_process_hint_user(reg_request);
<------><------>break;
<------>case NL80211_REGDOM_SET_BY_DRIVER:
<------><------>if (!wiphy)
<------><------><------>goto out_free;
<------><------>treatment = reg_process_hint_driver(wiphy, reg_request);
<------><------>break;
<------>case NL80211_REGDOM_SET_BY_COUNTRY_IE:
<------><------>if (!wiphy)
<------><------><------>goto out_free;
<------><------>treatment = reg_process_hint_country_ie(wiphy, reg_request);
<------><------>break;
<------>default:
<------><------>WARN(1, "invalid initiator %d\n", initiator);
<------><------>goto out_free;
<------>}
 
<------>if (treatment == REG_REQ_IGNORE)
<------><------>goto out_free;
 
<------>WARN(treatment != REG_REQ_OK && treatment != REG_REQ_ALREADY_SET,
<------>     "unexpected treatment value %d\n", treatment);
 
<------>/* This is required so that the orig_* parameters are saved.
<------> * NOTE: treatment must be set for any case that reaches here!
<------> */
<------>if (treatment == REG_REQ_ALREADY_SET && wiphy &&
<------>    wiphy->regulatory_flags & REGULATORY_STRICT_REG) {
<------><------>wiphy_update_regulatory(wiphy, initiator);
<------><------>wiphy_all_share_dfs_chan_state(wiphy);
<------><------>reg_check_channels();
<------>}
 
<------>return;
 
out_free:
<------>reg_free_request(reg_request);
}
 
static void notify_self_managed_wiphys(struct regulatory_request *request)
{
<------>struct cfg80211_registered_device *rdev;
<------>struct wiphy *wiphy;
 
<------>list_for_each_entry(rdev, &cfg80211_rdev_list, list) {
<------><------>wiphy = &rdev->wiphy;
<------><------>if (wiphy->regulatory_flags & REGULATORY_WIPHY_SELF_MANAGED &&
<------><------>    request->initiator == NL80211_REGDOM_SET_BY_USER)
<------><------><------>reg_call_notifier(wiphy, request);
<------>}
}
 
/*
 * Processes regulatory hints, this is all the NL80211_REGDOM_SET_BY_*
 * Regulatory hints come on a first come first serve basis and we
 * must process each one atomically.
 */
static void reg_process_pending_hints(void)
{
<------>struct regulatory_request *reg_request, *lr;
 
<------>lr = get_last_request();
 
<------>/* When last_request->processed becomes true this will be rescheduled */
<------>if (lr && !lr->processed) {
<------><------>pr_debug("Pending regulatory request, waiting for it to be processed...\n");
<------><------>return;
<------>}
 
<------>spin_lock(&reg_requests_lock);
 
<------>if (list_empty(&reg_requests_list)) {
<------><------>spin_unlock(&reg_requests_lock);
<------><------>return;
<------>}
 
<------>reg_request = list_first_entry(&reg_requests_list,
<------><------><------><------>       struct regulatory_request,
<------><------><------><------>       list);
<------>list_del_init(&reg_request->list);
 
<------>spin_unlock(&reg_requests_lock);
 
<------>notify_self_managed_wiphys(reg_request);
 
<------>reg_process_hint(reg_request);
 
<------>lr = get_last_request();
 
<------>spin_lock(&reg_requests_lock);
<------>if (!list_empty(&reg_requests_list) && lr && lr->processed)
<------><------>schedule_work(&reg_work);
<------>spin_unlock(&reg_requests_lock);
}
 
/* Processes beacon hints -- this has nothing to do with country IEs */
static void reg_process_pending_beacon_hints(void)
{
<------>struct cfg80211_registered_device *rdev;
<------>struct reg_beacon *pending_beacon, *tmp;
 
<------>/* This goes through the _pending_ beacon list */
<------>spin_lock_bh(&reg_pending_beacons_lock);
 
<------>list_for_each_entry_safe(pending_beacon, tmp,
<------><------><------><------> &reg_pending_beacons, list) {
<------><------>list_del_init(&pending_beacon->list);
 
<------><------>/* Applies the beacon hint to current wiphys */
<------><------>list_for_each_entry(rdev, &cfg80211_rdev_list, list)
<------><------><------>wiphy_update_new_beacon(&rdev->wiphy, pending_beacon);
 
<------><------>/* Remembers the beacon hint for new wiphys or reg changes */
<------><------>list_add_tail(&pending_beacon->list, &reg_beacon_list);
<------>}
 
<------>spin_unlock_bh(&reg_pending_beacons_lock);
}
 
static void reg_process_self_managed_hints(void)
{
<------>struct cfg80211_registered_device *rdev;
<------>struct wiphy *wiphy;
<------>const struct ieee80211_regdomain *tmp;
<------>const struct ieee80211_regdomain *regd;
<------>enum nl80211_band band;
<------>struct regulatory_request request = {};
 
<------>list_for_each_entry(rdev, &cfg80211_rdev_list, list) {
<------><------>wiphy = &rdev->wiphy;
 
<------><------>spin_lock(&reg_requests_lock);
<------><------>regd = rdev->requested_regd;
<------><------>rdev->requested_regd = NULL;
<------><------>spin_unlock(&reg_requests_lock);
 
<------><------>if (regd == NULL)
<------><------><------>continue;
 
<------><------>tmp = get_wiphy_regdom(wiphy);
<------><------>rcu_assign_pointer(wiphy->regd, regd);
<------><------>rcu_free_regdom(tmp);
 
<------><------>for (band = 0; band < NUM_NL80211_BANDS; band++)
<------><------><------>handle_band_custom(wiphy, wiphy->bands[band], regd);
 
<------><------>reg_process_ht_flags(wiphy);
 
<------><------>request.wiphy_idx = get_wiphy_idx(wiphy);
<------><------>request.alpha2[0] = regd->alpha2[0];
<------><------>request.alpha2[1] = regd->alpha2[1];
<------><------>request.initiator = NL80211_REGDOM_SET_BY_DRIVER;
 
<------><------>nl80211_send_wiphy_reg_change_event(&request);
<------>}
 
<------>reg_check_channels();
}
 
static void reg_todo(struct work_struct *work)
{
<------>rtnl_lock();
<------>reg_process_pending_hints();
<------>reg_process_pending_beacon_hints();
<------>reg_process_self_managed_hints();
<------>rtnl_unlock();
}
 
static void queue_regulatory_request(struct regulatory_request *request)
{
<------>request->alpha2[0] = toupper(request->alpha2[0]);
<------>request->alpha2[1] = toupper(request->alpha2[1]);
 
<------>spin_lock(&reg_requests_lock);
<------>list_add_tail(&request->list, &reg_requests_list);
<------>spin_unlock(&reg_requests_lock);
 
<------>schedule_work(&reg_work);
}
 
/*
 * Core regulatory hint -- happens during cfg80211_init()
 * and when we restore regulatory settings.
 */
static int regulatory_hint_core(const char *alpha2)
{
<------>struct regulatory_request *request;
 
<------>request = kzalloc(sizeof(struct regulatory_request), GFP_KERNEL);
<------>if (!request)
<------><------>return -ENOMEM;
 
<------>request->alpha2[0] = alpha2[0];
<------>request->alpha2[1] = alpha2[1];
<------>request->initiator = NL80211_REGDOM_SET_BY_CORE;
<------>request->wiphy_idx = WIPHY_IDX_INVALID;
 
<------>queue_regulatory_request(request);
 
<------>return 0;
}
 
/* User hints */
int regulatory_hint_user(const char *alpha2,
<------><------><------> enum nl80211_user_reg_hint_type user_reg_hint_type)
{
<------>struct regulatory_request *request;
 
<------>if (WARN_ON(!alpha2))
<------><------>return -EINVAL;
 
<------>if (!is_world_regdom(alpha2) && !is_an_alpha2(alpha2))
<------><------>return -EINVAL;
 
<------>request = kzalloc(sizeof(struct regulatory_request), GFP_KERNEL);
<------>if (!request)
<------><------>return -ENOMEM;
 
<------>request->wiphy_idx = WIPHY_IDX_INVALID;
<------>request->alpha2[0] = alpha2[0];
<------>request->alpha2[1] = alpha2[1];
<------>request->initiator = NL80211_REGDOM_SET_BY_USER;
<------>request->user_reg_hint_type = user_reg_hint_type;
 
<------>/* Allow calling CRDA again */
<------>reset_crda_timeouts();
 
<------>queue_regulatory_request(request);
 
<------>return 0;
}
 
int regulatory_hint_indoor(bool is_indoor, u32 portid)
{
<------>spin_lock(&reg_indoor_lock);
 
<------>/* It is possible that more than one user space process is trying to
<------> * configure the indoor setting. To handle such cases, clear the indoor
<------> * setting in case that some process does not think that the device
<------> * is operating in an indoor environment. In addition, if a user space
<------> * process indicates that it is controlling the indoor setting, save its
<------> * portid, i.e., make it the owner.
<------> */
<------>reg_is_indoor = is_indoor;
<------>if (reg_is_indoor) {
<------><------>if (!reg_is_indoor_portid)
<------><------><------>reg_is_indoor_portid = portid;
<------>} else {
<------><------>reg_is_indoor_portid = 0;
<------>}
 
<------>spin_unlock(&reg_indoor_lock);
 
<------>if (!is_indoor)
<------><------>reg_check_channels();
 
<------>return 0;
}
 
void regulatory_netlink_notify(u32 portid)
{
<------>spin_lock(&reg_indoor_lock);
 
<------>if (reg_is_indoor_portid != portid) {
<------><------>spin_unlock(&reg_indoor_lock);
<------><------>return;
<------>}
 
<------>reg_is_indoor = false;
<------>reg_is_indoor_portid = 0;
 
<------>spin_unlock(&reg_indoor_lock);
 
<------>reg_check_channels();
}
 
/* Driver hints */
int regulatory_hint(struct wiphy *wiphy, const char *alpha2)
{
<------>struct regulatory_request *request;
 
<------>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;
 
<------>request->wiphy_idx = get_wiphy_idx(wiphy);
 
<------>request->alpha2[0] = alpha2[0];
<------>request->alpha2[1] = alpha2[1];
<------>request->initiator = NL80211_REGDOM_SET_BY_DRIVER;
 
<------>/* Allow calling CRDA again */
<------>reset_crda_timeouts();
 
<------>queue_regulatory_request(request);
 
<------>return 0;
}
EXPORT_SYMBOL(regulatory_hint);
 
void regulatory_hint_country_ie(struct wiphy *wiphy, enum nl80211_band band,
<------><------><------><------>const u8 *country_ie, u8 country_ie_len)
{
<------>char alpha2[2];
<------>enum environment_cap env = ENVIRON_ANY;
<------>struct regulatory_request *request = NULL, *lr;
 
<------>/* IE len must be evenly divisible by 2 */
<------>if (country_ie_len & 0x01)
<------><------>return;
 
<------>if (country_ie_len < IEEE80211_COUNTRY_IE_MIN_LEN)
<------><------>return;
 
<------>request = kzalloc(sizeof(*request), GFP_KERNEL);
<------>if (!request)
<------><------>return;
 
<------>alpha2[0] = country_ie[0];
<------>alpha2[1] = country_ie[1];
 
<------>if (country_ie[2] == 'I')
<------><------>env = ENVIRON_INDOOR;
<------>else if (country_ie[2] == 'O')
<------><------>env = ENVIRON_OUTDOOR;
 
<------>rcu_read_lock();
<------>lr = get_last_request();
 
<------>if (unlikely(!lr))
<------><------>goto out;
 
<------>/*
<------> * We will run this only upon a successful connection on cfg80211.
<------> * We leave conflict resolution to the workqueue, where can hold
<------> * the RTNL.
<------> */
<------>if (lr->initiator == NL80211_REGDOM_SET_BY_COUNTRY_IE &&
<------>    lr->wiphy_idx != WIPHY_IDX_INVALID)
<------><------>goto out;
 
<------>request->wiphy_idx = get_wiphy_idx(wiphy);
<------>request->alpha2[0] = alpha2[0];
<------>request->alpha2[1] = alpha2[1];
<------>request->initiator = NL80211_REGDOM_SET_BY_COUNTRY_IE;
<------>request->country_ie_env = env;
 
<------>/* Allow calling CRDA again */
<------>reset_crda_timeouts();
 
<------>queue_regulatory_request(request);
<------>request = NULL;
out:
<------>kfree(request);
<------>rcu_read_unlock();
}
 
static void restore_alpha2(char *alpha2, bool reset_user)
{
<------>/* indicates there is no alpha2 to consider for restoration */
<------>alpha2[0] = '9';
<------>alpha2[1] = '7';
 
<------>/* The user setting has precedence over the module parameter */
<------>if (is_user_regdom_saved()) {
<------><------>/* Unless we're asked to ignore it and reset it */
<------><------>if (reset_user) {
<------><------><------>pr_debug("Restoring regulatory settings including user preference\n");
<------><------><------>user_alpha2[0] = '9';
<------><------><------>user_alpha2[1] = '7';
 
<------><------><------>/*
<------><------><------> * If we're ignoring user settings, we still need to
<------><------><------> * check the module parameter to ensure we put things
<------><------><------> * back as they were for a full restore.
<------><------><------> */
<------><------><------>if (!is_world_regdom(ieee80211_regdom)) {
<------><------><------><------>pr_debug("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 {
<------><------><------>pr_debug("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)) {
<------><------>pr_debug("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
<------><------>pr_debug("Restoring regulatory settings\n");
}
 
static void restore_custom_reg_settings(struct wiphy *wiphy)
{
<------>struct ieee80211_supported_band *sband;
<------>enum nl80211_band band;
<------>struct ieee80211_channel *chan;
<------>int i;
 
<------>for (band = 0; band < NUM_NL80211_BANDS; band++) {
<------><------>sband = wiphy->bands[band];
<------><------>if (!sband)
<------><------><------>continue;
<------><------>for (i = 0; i < sband->n_channels; i++) {
<------><------><------>chan = &sband->channels[i];
<------><------><------>chan->flags = chan->orig_flags;
<------><------><------>chan->max_antenna_gain = chan->orig_mag;
<------><------><------>chan->max_power = chan->orig_mpwr;
<------><------><------>chan->beacon_found = false;
<------><------>}
<------>}
}
 
/*
 * Restoring regulatory settings involves ingoring any
 * possibly stale country IE information and user regulatory
 * settings if so desired, this includes any beacon hints
 * learned as we could have traveled outside to another country
 * after disconnection. To restore regulatory settings we do
 * exactly what we did at bootup:
 *
 *   - send a core regulatory hint
 *   - send a user regulatory hint if applicable
 *
 * Device drivers that send a regulatory hint for a specific country
 * keep their own regulatory domain on wiphy->regd so that does
 * not need to be remembered.
 */
static void restore_regulatory_settings(bool reset_user, bool cached)
{
<------>char alpha2[2];
<------>char world_alpha2[2];
<------>struct reg_beacon *reg_beacon, *btmp;
<------>LIST_HEAD(tmp_reg_req_list);
<------>struct cfg80211_registered_device *rdev;
 
<------>ASSERT_RTNL();
 
<------>/*
<------> * Clear the indoor setting in case that it is not controlled by user
<------> * space, as otherwise there is no guarantee that the device is still
<------> * operating in an indoor environment.
<------> */
<------>spin_lock(&reg_indoor_lock);
<------>if (reg_is_indoor && !reg_is_indoor_portid) {
<------><------>reg_is_indoor = false;
<------><------>reg_check_channels();
<------>}
<------>spin_unlock(&reg_indoor_lock);
 
<------>reset_regdomains(true, &world_regdom);
<------>restore_alpha2(alpha2, reset_user);
 
<------>/*
<------> * If there's any pending requests we simply
<------> * stash them to a temporary pending queue and
<------> * add then after we've restored regulatory
<------> * settings.
<------> */
<------>spin_lock(&reg_requests_lock);
<------>list_splice_tail_init(&reg_requests_list, &tmp_reg_req_list);
<------>spin_unlock(&reg_requests_lock);
 
<------>/* Clear beacon hints */
<------>spin_lock_bh(&reg_pending_beacons_lock);
<------>list_for_each_entry_safe(reg_beacon, btmp, &reg_pending_beacons, list) {
<------><------>list_del(&reg_beacon->list);
<------><------>kfree(reg_beacon);
<------>}
<------>spin_unlock_bh(&reg_pending_beacons_lock);
 
<------>list_for_each_entry_safe(reg_beacon, btmp, &reg_beacon_list, list) {
<------><------>list_del(&reg_beacon->list);
<------><------>kfree(reg_beacon);
<------>}
 
<------>/* First restore to the basic regulatory settings */
<------>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.regulatory_flags & REGULATORY_WIPHY_SELF_MANAGED)
<------><------><------>continue;
<------><------>if (rdev->wiphy.regulatory_flags & REGULATORY_CUSTOM_REG)
<------><------><------>restore_custom_reg_settings(&rdev->wiphy);
<------>}
 
<------>if (cached && (!is_an_alpha2(alpha2) ||
<------><------>       !IS_ERR_OR_NULL(cfg80211_user_regdom))) {
<------><------>reset_regdomains(false, cfg80211_world_regdom);
<------><------>update_all_wiphy_regulatory(NL80211_REGDOM_SET_BY_CORE);
<------><------>print_regdomain(get_cfg80211_regdom());
<------><------>nl80211_send_reg_change_event(&core_request_world);
<------><------>reg_set_request_processed();
 
<------><------>if (is_an_alpha2(alpha2) &&
<------><------>    !regulatory_hint_user(alpha2, NL80211_USER_REG_HINT_USER)) {
<------><------><------>struct regulatory_request *ureq;
 
<------><------><------>spin_lock(&reg_requests_lock);
<------><------><------>ureq = list_last_entry(&reg_requests_list,
<------><------><------><------><------>       struct regulatory_request,
<------><------><------><------><------>       list);
<------><------><------>list_del(&ureq->list);
<------><------><------>spin_unlock(&reg_requests_lock);
 
<------><------><------>notify_self_managed_wiphys(ureq);
<------><------><------>reg_update_last_request(ureq);
<------><------><------>set_regdom(reg_copy_regd(cfg80211_user_regdom),
<------><------><------><------>   REGD_SOURCE_CACHED);
<------><------>}
<------>} else {
<------><------>regulatory_hint_core(world_alpha2);
 
<------><------>/*
<------><------> * This restores the ieee80211_regdom module parameter
<------><------> * preference or the last user requested regulatory
<------><------> * settings, user regulatory settings takes precedence.
<------><------> */
<------><------>if (is_an_alpha2(alpha2))
<------><------><------>regulatory_hint_user(alpha2, NL80211_USER_REG_HINT_USER);
<------>}
 
<------>spin_lock(&reg_requests_lock);
<------>list_splice_tail_init(&tmp_reg_req_list, &reg_requests_list);
<------>spin_unlock(&reg_requests_lock);
 
<------>pr_debug("Kicking the queue\n");
 
<------>schedule_work(&reg_work);
}
 
static bool is_wiphy_all_set_reg_flag(enum ieee80211_regulatory_flags flag)
{
<------>struct cfg80211_registered_device *rdev;
<------>struct wireless_dev *wdev;
 
<------>list_for_each_entry(rdev, &cfg80211_rdev_list, list) {
<------><------>list_for_each_entry(wdev, &rdev->wiphy.wdev_list, list) {
<------><------><------>wdev_lock(wdev);
<------><------><------>if (!(wdev->wiphy->regulatory_flags & flag)) {
<------><------><------><------>wdev_unlock(wdev);
<------><------><------><------>return false;
<------><------><------>}
<------><------><------>wdev_unlock(wdev);
<------><------>}
<------>}
 
<------>return true;
}
 
void regulatory_hint_disconnect(void)
{
<------>/* Restore of regulatory settings is not required when wiphy(s)
<------> * ignore IE from connected access point but clearance of beacon hints
<------> * is required when wiphy(s) supports beacon hints.
<------> */
<------>if (is_wiphy_all_set_reg_flag(REGULATORY_COUNTRY_IE_IGNORE)) {
<------><------>struct reg_beacon *reg_beacon, *btmp;
 
<------><------>if (is_wiphy_all_set_reg_flag(REGULATORY_DISABLE_BEACON_HINTS))
<------><------><------>return;
 
<------><------>spin_lock_bh(&reg_pending_beacons_lock);
<------><------>list_for_each_entry_safe(reg_beacon, btmp,
<------><------><------><------><------> &reg_pending_beacons, list) {
<------><------><------>list_del(&reg_beacon->list);
<------><------><------>kfree(reg_beacon);
<------><------>}
<------><------>spin_unlock_bh(&reg_pending_beacons_lock);
 
<------><------>list_for_each_entry_safe(reg_beacon, btmp,
<------><------><------><------><------> &reg_beacon_list, list) {
<------><------><------>list_del(&reg_beacon->list);
<------><------><------>kfree(reg_beacon);
<------><------>}
 
<------><------>return;
<------>}
 
<------>pr_debug("All devices are disconnected, going to restore regulatory settings\n");
<------>restore_regulatory_settings(false, true);
}
 
static bool freq_is_chan_12_13_14(u32 freq)
{
<------>if (freq == ieee80211_channel_to_frequency(12, NL80211_BAND_2GHZ) ||
<------>    freq == ieee80211_channel_to_frequency(13, NL80211_BAND_2GHZ) ||
<------>    freq == ieee80211_channel_to_frequency(14, NL80211_BAND_2GHZ))
<------><------>return true;
<------>return false;
}
 
static bool pending_reg_beacon(struct ieee80211_channel *beacon_chan)
{
<------>struct reg_beacon *pending_beacon;
 
<------>list_for_each_entry(pending_beacon, &reg_pending_beacons, list)
<------><------>if (ieee80211_channel_equal(beacon_chan,
<------><------><------><------><------>    &pending_beacon->chan))
<------><------><------>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 (beacon_chan->beacon_found ||
<------>    beacon_chan->flags & IEEE80211_CHAN_RADAR ||
<------>    (beacon_chan->band == NL80211_BAND_2GHZ &&
<------>     !freq_is_chan_12_13_14(beacon_chan->center_freq)))
<------><------>return 0;
 
<------>spin_lock_bh(&reg_pending_beacons_lock);
<------>processing = pending_reg_beacon(beacon_chan);
<------>spin_unlock_bh(&reg_pending_beacons_lock);
 
<------>if (processing)
<------><------>return 0;
 
<------>reg_beacon = kzalloc(sizeof(struct reg_beacon), gfp);
<------>if (!reg_beacon)
<------><------>return -ENOMEM;
 
<------>pr_debug("Found new beacon on frequency: %d.%03d MHz (Ch %d) on %s\n",
<------><------> beacon_chan->center_freq, beacon_chan->freq_offset,
<------><------> ieee80211_freq_khz_to_channel(
<------><------><------> ieee80211_channel_to_khz(beacon_chan)),
<------><------> wiphy_name(wiphy));
 
<------>memcpy(&reg_beacon->chan, beacon_chan,
<------>       sizeof(struct ieee80211_channel));
 
<------>/*
<------> * Since we can be called from BH or and non-BH context
<------> * we must use spin_lock_bh()
<------> */
<------>spin_lock_bh(&reg_pending_beacons_lock);
<------>list_add_tail(&reg_beacon->list, &reg_pending_beacons);
<------>spin_unlock_bh(&reg_pending_beacons_lock);
 
<------>schedule_work(&reg_work);
 
<------>return 0;
}
 
static void print_rd_rules(const struct ieee80211_regdomain *rd)
{
<------>unsigned int i;
<------>const struct ieee80211_reg_rule *reg_rule = NULL;
<------>const struct ieee80211_freq_range *freq_range = NULL;
<------>const struct ieee80211_power_rule *power_rule = NULL;
<------>char bw[32], cac_time[32];
 
<------>pr_debug("  (start_freq - end_freq @ bandwidth), (max_antenna_gain, max_eirp), (dfs_cac_time)\n");
 
<------>for (i = 0; i < rd->n_reg_rules; i++) {
<------><------>reg_rule = &rd->reg_rules[i];
<------><------>freq_range = &reg_rule->freq_range;
<------><------>power_rule = &reg_rule->power_rule;
 
<------><------>if (reg_rule->flags & NL80211_RRF_AUTO_BW)
<------><------><------>snprintf(bw, sizeof(bw), "%d KHz, %u KHz AUTO",
<------><------><------><------> freq_range->max_bandwidth_khz,
<------><------><------><------> reg_get_max_bandwidth(rd, reg_rule));
<------><------>else
<------><------><------>snprintf(bw, sizeof(bw), "%d KHz",
<------><------><------><------> freq_range->max_bandwidth_khz);
 
<------><------>if (reg_rule->flags & NL80211_RRF_DFS)
<------><------><------>scnprintf(cac_time, sizeof(cac_time), "%u s",
<------><------><------><------>  reg_rule->dfs_cac_ms/1000);
<------><------>else
<------><------><------>scnprintf(cac_time, sizeof(cac_time), "N/A");
 
 
<------><------>/*
<------><------> * There may not be documentation for max antenna gain
<------><------> * in certain regions
<------><------> */
<------><------>if (power_rule->max_antenna_gain)
<------><------><------>pr_debug("  (%d KHz - %d KHz @ %s), (%d mBi, %d mBm), (%s)\n",
<------><------><------><------>freq_range->start_freq_khz,
<------><------><------><------>freq_range->end_freq_khz,
<------><------><------><------>bw,
<------><------><------><------>power_rule->max_antenna_gain,
<------><------><------><------>power_rule->max_eirp,
<------><------><------><------>cac_time);
<------><------>else
<------><------><------>pr_debug("  (%d KHz - %d KHz @ %s), (N/A, %d mBm), (%s)\n",
<------><------><------><------>freq_range->start_freq_khz,
<------><------><------><------>freq_range->end_freq_khz,
<------><------><------><------>bw,
<------><------><------><------>power_rule->max_eirp,
<------><------><------><------>cac_time);
<------>}
}
 
bool reg_supported_dfs_region(enum nl80211_dfs_regions dfs_region)
{
<------>switch (dfs_region) {
<------>case NL80211_DFS_UNSET:
<------>case NL80211_DFS_FCC:
<------>case NL80211_DFS_ETSI:
<------>case NL80211_DFS_JP:
<------><------>return true;
<------>default:
<------><------>pr_debug("Ignoring unknown DFS master region: %d\n", dfs_region);
<------><------>return false;
<------>}
}
 
static void print_regdomain(const struct ieee80211_regdomain *rd)
{
<------>struct regulatory_request *lr = get_last_request();
 
<------>if (is_intersected_alpha2(rd->alpha2)) {
<------><------>if (lr->initiator == NL80211_REGDOM_SET_BY_COUNTRY_IE) {
<------><------><------>struct cfg80211_registered_device *rdev;
<------><------><------>rdev = cfg80211_rdev_by_wiphy_idx(lr->wiphy_idx);
<------><------><------>if (rdev) {
<------><------><------><------>pr_debug("Current regulatory domain updated by AP to: %c%c\n",
<------><------><------><------><------>rdev->country_ie_alpha2[0],
<------><------><------><------><------>rdev->country_ie_alpha2[1]);
<------><------><------>} else
<------><------><------><------>pr_debug("Current regulatory domain intersected:\n");
<------><------>} else
<------><------><------>pr_debug("Current regulatory domain intersected:\n");
<------>} else if (is_world_regdom(rd->alpha2)) {
<------><------>pr_debug("World regulatory domain updated:\n");
<------>} else {
<------><------>if (is_unknown_alpha2(rd->alpha2))
<------><------><------>pr_debug("Regulatory domain changed to driver built-in settings (unknown country)\n");
<------><------>else {
<------><------><------>if (reg_request_cell_base(lr))
<------><------><------><------>pr_debug("Regulatory domain changed to country: %c%c by Cell Station\n",
<------><------><------><------><------>rd->alpha2[0], rd->alpha2[1]);
<------><------><------>else
<------><------><------><------>pr_debug("Regulatory domain changed to country: %c%c\n",
<------><------><------><------><------>rd->alpha2[0], rd->alpha2[1]);
<------><------>}
<------>}
 
<------>pr_debug(" DFS Master region: %s", reg_dfs_region_str(rd->dfs_region));
<------>print_rd_rules(rd);
}
 
static void print_regdomain_info(const struct ieee80211_regdomain *rd)
{
<------>pr_debug("Regulatory domain: %c%c\n", rd->alpha2[0], rd->alpha2[1]);
<------>print_rd_rules(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 *intersected_rd = NULL;
 
<------>if (!regdom_changes(rd->alpha2))
<------><------>return -EALREADY;
 
<------>if (!is_valid_rd(rd)) {
<------><------>pr_err("Invalid regulatory domain detected: %c%c\n",
<------><------>       rd->alpha2[0], rd->alpha2[1]);
<------><------>print_regdomain_info(rd);
<------><------>return -EINVAL;
<------>}
 
<------>if (!user_request->intersect) {
<------><------>reset_regdomains(false, rd);
<------><------>return 0;
<------>}
 
<------>intersected_rd = regdom_intersect(rd, get_cfg80211_regdom());
<------>if (!intersected_rd)
<------><------>return -EINVAL;
 
<------>kfree(rd);
<------>rd = NULL;
<------>reset_regdomains(false, intersected_rd);
 
<------>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: %c%c\n",
<------><------>       rd->alpha2[0], rd->alpha2[1]);
<------><------>print_regdomain_info(rd);
<------><------>return -EINVAL;
<------>}
 
<------>request_wiphy = wiphy_idx_to_wiphy(driver_request->wiphy_idx);
<------>if (!request_wiphy)
<------><------>return -ENODEV;
 
<------>if (!driver_request->intersect) {
<------><------>if (request_wiphy->regd)
<------><------><------>return -EALREADY;
 
<------><------>regd = reg_copy_regd(rd);
<------><------>if (IS_ERR(regd))
<------><------><------>return PTR_ERR(regd);
 
<------><------>rcu_assign_pointer(request_wiphy->regd, regd);
<------><------>reset_regdomains(false, rd);
<------><------>return 0;
<------>}
 
<------>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);
 
<------>rd = NULL;
 
<------>reset_regdomains(false, intersected_rd);
 
<------>return 0;
}
 
static int reg_set_rd_country_ie(const struct ieee80211_regdomain *rd,
<------><------><------><------> struct regulatory_request *country_ie_request)
{
<------>struct wiphy *request_wiphy;
 
<------>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: %c%c\n",
<------><------>       rd->alpha2[0], rd->alpha2[1]);
<------><------>print_regdomain_info(rd);
<------><------>return -EINVAL;
<------>}
 
<------>request_wiphy = wiphy_idx_to_wiphy(country_ie_request->wiphy_idx);
<------>if (!request_wiphy)
<------><------>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
 * multiple drivers can be ironed out later. Caller must've already
 * kmalloc'd the rd structure.
 */
int set_regdom(const struct ieee80211_regdomain *rd,
<------>       enum ieee80211_regd_source regd_src)
{
<------>struct regulatory_request *lr;
<------>bool user_reset = false;
<------>int r;
 
<------>if (IS_ERR_OR_NULL(rd))
<------><------>return -ENODATA;
 
<------>if (!reg_is_valid_request(rd->alpha2)) {
<------><------>kfree(rd);
<------><------>return -EINVAL;
<------>}
 
<------>if (regd_src == REGD_SOURCE_CRDA)
<------><------>reset_crda_timeouts();
 
<------>lr = get_last_request();
 
<------>/* Note that this doesn't update the wiphys, this is done below */
<------>switch (lr->initiator) {
<------>case NL80211_REGDOM_SET_BY_CORE:
<------><------>r = reg_set_rd_core(rd);
<------><------>break;
<------>case NL80211_REGDOM_SET_BY_USER:
<------><------>cfg80211_save_user_regdom(rd);
<------><------>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);
<------><------>kfree(rd);
<------><------>return -EINVAL;
<------>}
 
<------>if (r) {
<------><------>switch (r) {
<------><------>case -EALREADY:
<------><------><------>reg_set_request_processed();
<------><------><------>break;
<------><------>default:
<------><------><------>/* Back to world regulatory in case of errors */
<------><------><------>restore_regulatory_settings(user_reset, false);
<------><------>}
 
<------><------>kfree(rd);
<------><------>return r;
<------>}
 
<------>/* This would make this whole thing pointless */
<------>if (WARN_ON(!lr->intersect && rd != get_cfg80211_regdom()))
<------><------>return -EINVAL;
 
<------>/* update all wiphys now with the new established regulatory domain */
<------>update_all_wiphy_regulatory(lr->initiator);
 
<------>print_regdomain(get_cfg80211_regdom());
 
<------>nl80211_send_reg_change_event(lr);
 
<------>reg_set_request_processed();
 
<------>return 0;
}
 
static int __regulatory_set_wiphy_regd(struct wiphy *wiphy,
<------><------><------><------>       struct ieee80211_regdomain *rd)
{
<------>const struct ieee80211_regdomain *regd;
<------>const struct ieee80211_regdomain *prev_regd;
<------>struct cfg80211_registered_device *rdev;
 
<------>if (WARN_ON(!wiphy || !rd))
<------><------>return -EINVAL;
 
<------>if (WARN(!(wiphy->regulatory_flags & REGULATORY_WIPHY_SELF_MANAGED),
<------><------> "wiphy should have REGULATORY_WIPHY_SELF_MANAGED\n"))
<------><------>return -EPERM;
 
<------>if (WARN(!is_valid_rd(rd), "Invalid regulatory domain detected\n")) {
<------><------>print_regdomain_info(rd);
<------><------>return -EINVAL;
<------>}
 
<------>regd = reg_copy_regd(rd);
<------>if (IS_ERR(regd))
<------><------>return PTR_ERR(regd);
 
<------>rdev = wiphy_to_rdev(wiphy);
 
<------>spin_lock(&reg_requests_lock);
<------>prev_regd = rdev->requested_regd;
<------>rdev->requested_regd = regd;
<------>spin_unlock(&reg_requests_lock);
 
<------>kfree(prev_regd);
<------>return 0;
}
 
int regulatory_set_wiphy_regd(struct wiphy *wiphy,
<------><------><------>      struct ieee80211_regdomain *rd)
{
<------>int ret = __regulatory_set_wiphy_regd(wiphy, rd);
 
<------>if (ret)
<------><------>return ret;
 
<------>schedule_work(&reg_work);
<------>return 0;
}
EXPORT_SYMBOL(regulatory_set_wiphy_regd);
 
int regulatory_set_wiphy_regd_sync_rtnl(struct wiphy *wiphy,
<------><------><------><------><------>struct ieee80211_regdomain *rd)
{
<------>int ret;
 
<------>ASSERT_RTNL();
 
<------>ret = __regulatory_set_wiphy_regd(wiphy, rd);
<------>if (ret)
<------><------>return ret;
 
<------>/* process the request immediately */
<------>reg_process_self_managed_hints();
<------>return 0;
}
EXPORT_SYMBOL(regulatory_set_wiphy_regd_sync_rtnl);
 
void wiphy_regulatory_register(struct wiphy *wiphy)
{
<------>struct regulatory_request *lr = get_last_request();
 
<------>/* self-managed devices ignore beacon hints and country IE */
<------>if (wiphy->regulatory_flags & REGULATORY_WIPHY_SELF_MANAGED) {
<------><------>wiphy->regulatory_flags |= REGULATORY_DISABLE_BEACON_HINTS |
<------><------><------><------><------>   REGULATORY_COUNTRY_IE_IGNORE;
 
<------><------>/*
<------><------> * The last request may have been received before this
<------><------> * registration call. Call the driver notifier if
<------><------> * initiator is USER.
<------><------> */
<------><------>if (lr->initiator == NL80211_REGDOM_SET_BY_USER)
<------><------><------>reg_call_notifier(wiphy, lr);
<------>}
 
<------>if (!reg_dev_ignore_cell_hint(wiphy))
<------><------>reg_num_devs_support_basehint++;
 
<------>wiphy_update_regulatory(wiphy, lr->initiator);
<------>wiphy_all_share_dfs_chan_state(wiphy);
}
 
void wiphy_regulatory_deregister(struct wiphy *wiphy)
{
<------>struct wiphy *request_wiphy = NULL;
<------>struct regulatory_request *lr;
 
<------>lr = get_last_request();
 
<------>if (!reg_dev_ignore_cell_hint(wiphy))
<------><------>reg_num_devs_support_basehint--;
 
<------>rcu_free_regdom(get_wiphy_regdom(wiphy));
<------>RCU_INIT_POINTER(wiphy->regd, NULL);
 
<------>if (lr)
<------><------>request_wiphy = wiphy_idx_to_wiphy(lr->wiphy_idx);
 
<------>if (!request_wiphy || request_wiphy != wiphy)
<------><------>return;
 
<------>lr->wiphy_idx = WIPHY_IDX_INVALID;
<------>lr->country_ie_env = ENVIRON_ANY;
}
 
/*
 * See FCC notices for UNII band definitions
 *  5GHz: https://www.fcc.gov/document/5-ghz-unlicensed-spectrum-unii
 *  6GHz: https://www.fcc.gov/document/fcc-proposes-more-spectrum-unlicensed-use-0
 */
int cfg80211_get_unii(int freq)
{
<------>/* UNII-1 */
<------>if (freq >= 5150 && freq <= 5250)
<------><------>return 0;
 
<------>/* UNII-2A */
<------>if (freq > 5250 && freq <= 5350)
<------><------>return 1;
 
<------>/* UNII-2B */
<------>if (freq > 5350 && freq <= 5470)
<------><------>return 2;
 
<------>/* UNII-2C */
<------>if (freq > 5470 && freq <= 5725)
<------><------>return 3;
 
<------>/* UNII-3 */
<------>if (freq > 5725 && freq <= 5825)
<------><------>return 4;
 
<------>/* UNII-5 */
<------>if (freq > 5925 && freq <= 6425)
<------><------>return 5;
 
<------>/* UNII-6 */
<------>if (freq > 6425 && freq <= 6525)
<------><------>return 6;
 
<------>/* UNII-7 */
<------>if (freq > 6525 && freq <= 6875)
<------><------>return 7;
 
<------>/* UNII-8 */
<------>if (freq > 6875 && freq <= 7125)
<------><------>return 8;
 
<------>return -EINVAL;
}
 
bool regulatory_indoor_allowed(void)
{
<------>return reg_is_indoor;
}
 
bool regulatory_pre_cac_allowed(struct wiphy *wiphy)
{
<------>const struct ieee80211_regdomain *regd = NULL;
<------>const struct ieee80211_regdomain *wiphy_regd = NULL;
<------>bool pre_cac_allowed = false;
 
<------>rcu_read_lock();
 
<------>regd = rcu_dereference(cfg80211_regdomain);
<------>wiphy_regd = rcu_dereference(wiphy->regd);
<------>if (!wiphy_regd) {
<------><------>if (regd->dfs_region == NL80211_DFS_ETSI)
<------><------><------>pre_cac_allowed = true;
 
<------><------>rcu_read_unlock();
 
<------><------>return pre_cac_allowed;
<------>}
 
<------>if (regd->dfs_region == wiphy_regd->dfs_region &&
<------>    wiphy_regd->dfs_region == NL80211_DFS_ETSI)
<------><------>pre_cac_allowed = true;
 
<------>rcu_read_unlock();
 
<------>return pre_cac_allowed;
}
EXPORT_SYMBOL(regulatory_pre_cac_allowed);
 
static void cfg80211_check_and_end_cac(struct cfg80211_registered_device *rdev)
{
<------>struct wireless_dev *wdev;
<------>/* If we finished CAC or received radar, we should end any
<------> * CAC running on the same channels.
<------> * the check !cfg80211_chandef_dfs_usable contain 2 options:
<------> * either all channels are available - those the CAC_FINISHED
<------> * event has effected another wdev state, or there is a channel
<------> * in unavailable state in wdev chandef - those the RADAR_DETECTED
<------> * event has effected another wdev state.
<------> * In both cases we should end the CAC on the wdev.
<------> */
<------>list_for_each_entry(wdev, &rdev->wiphy.wdev_list, list) {
<------><------>if (wdev->cac_started &&
<------><------>    !cfg80211_chandef_dfs_usable(&rdev->wiphy, &wdev->chandef))
<------><------><------>rdev_end_cac(rdev, wdev->netdev);
<------>}
}
 
void regulatory_propagate_dfs_state(struct wiphy *wiphy,
<------><------><------><------>    struct cfg80211_chan_def *chandef,
<------><------><------><------>    enum nl80211_dfs_state dfs_state,
<------><------><------><------>    enum nl80211_radar_event event)
{
<------>struct cfg80211_registered_device *rdev;
 
<------>ASSERT_RTNL();
 
<------>if (WARN_ON(!cfg80211_chandef_valid(chandef)))
<------><------>return;
 
<------>list_for_each_entry(rdev, &cfg80211_rdev_list, list) {
<------><------>if (wiphy == &rdev->wiphy)
<------><------><------>continue;
 
<------><------>if (!reg_dfs_domain_same(wiphy, &rdev->wiphy))
<------><------><------>continue;
 
<------><------>if (!ieee80211_get_channel(&rdev->wiphy,
<------><------><------><------><------>   chandef->chan->center_freq))
<------><------><------>continue;
 
<------><------>cfg80211_set_dfs_state(&rdev->wiphy, chandef, dfs_state);
 
<------><------>if (event == NL80211_RADAR_DETECTED ||
<------><------>    event == NL80211_RADAR_CAC_FINISHED) {
<------><------><------>cfg80211_sched_dfs_chan_update(rdev);
<------><------><------>cfg80211_check_and_end_cac(rdev);
<------><------>}
 
<------><------>nl80211_radar_notify(rdev, chandef, event, NULL, GFP_KERNEL);
<------>}
}
 
static int __init regulatory_init_db(void)
{
<------>int err;
 
<------>/*
<------> * It's possible that - due to other bugs/issues - cfg80211
<------> * never called regulatory_init() below, or that it failed;
<------> * in that case, don't try to do any further work here as
<------> * it's doomed to lead to crashes.
<------> */
<------>if (IS_ERR_OR_NULL(reg_pdev))
<------><------>return -EINVAL;
 
<------>err = load_builtin_regdb_keys();
<------>if (err)
<------><------>return err;
 
<------>/* We always try to get an update for the static regdomain */
<------>err = regulatory_hint_core(cfg80211_world_regdom->alpha2);
<------>if (err) {
<------><------>if (err == -ENOMEM) {
<------><------><------>platform_device_unregister(reg_pdev);
<------><------><------>return err;
<------><------>}
<------><------>/*
<------><------> * N.B. kobject_uevent_env() can fail mainly for when we're out
<------><------> * memory which is handled and propagated appropriately above
<------><------> * but it can also fail during a netlink_broadcast() or during
<------><------> * early boot for call_usermodehelper(). For now treat these
<------><------> * errors as non-fatal.
<------><------> */
<------><------>pr_err("kobject_uevent_env() was unable to call CRDA during init\n");
<------>}
 
<------>/*
<------> * Finally, if the user set the module parameter treat it
<------> * as a user hint.
<------> */
<------>if (!is_world_regdom(ieee80211_regdom))
<------><------>regulatory_hint_user(ieee80211_regdom,
<------><------><------><------>     NL80211_USER_REG_HINT_USER);
 
<------>return 0;
}
#ifndef MODULE
late_initcall(regulatory_init_db);
#endif
 
int __init regulatory_init(void)
{
<------>reg_pdev = platform_device_register_simple("regulatory", 0, NULL, 0);
<------>if (IS_ERR(reg_pdev))
<------><------>return PTR_ERR(reg_pdev);
 
<------>spin_lock_init(&reg_requests_lock);
<------>spin_lock_init(&reg_pending_beacons_lock);
<------>spin_lock_init(&reg_indoor_lock);
 
<------>rcu_assign_pointer(cfg80211_regdomain, cfg80211_world_regdom);
 
<------>user_alpha2[0] = '9';
<------>user_alpha2[1] = '7';
 
#ifdef MODULE
<------>return regulatory_init_db();
#else
<------>return 0;
#endif
}
 
void regulatory_exit(void)
{
<------>struct regulatory_request *reg_request, *tmp;
<------>struct reg_beacon *reg_beacon, *btmp;
 
<------>cancel_work_sync(&reg_work);
<------>cancel_crda_timeout_sync();
<------>cancel_delayed_work_sync(&reg_check_chans);
 
<------>/* Lock to suppress warnings */
<------>rtnl_lock();
<------>reset_regdomains(true, NULL);
<------>rtnl_unlock();
 
<------>dev_set_uevent_suppress(&reg_pdev->dev, true);
 
<------>platform_device_unregister(reg_pdev);
 
<------>list_for_each_entry_safe(reg_beacon, btmp, &reg_pending_beacons, list) {
<------><------>list_del(&reg_beacon->list);
<------><------>kfree(reg_beacon);
<------>}
 
<------>list_for_each_entry_safe(reg_beacon, btmp, &reg_beacon_list, list) {
<------><------>list_del(&reg_beacon->list);
<------><------>kfree(reg_beacon);
<------>}
 
<------>list_for_each_entry_safe(reg_request, tmp, &reg_requests_list, list) {
<------><------>list_del(&reg_request->list);
<------><------>kfree(reg_request);
<------>}
 
<------>if (!IS_ERR_OR_NULL(regdb))
<------><------>kfree(regdb);
<------>if (!IS_ERR_OR_NULL(cfg80211_user_regdom))
<------><------>kfree(cfg80211_user_regdom);
 
<------>free_regdb_keyring();
}