cregit-Linux how code gets into the kernel

Release 4.11 net/wireless/reg.c

Directory: net/wireless
/*
 * 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
 *
 * 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/moduleparam.h>
#include <net/cfg80211.h>
#include "core.h"
#include "reg.h"
#include "rdev-ops.h"
#include "regdb.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 */

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);


static const struct ieee80211_regdomain *get_cfg80211_regdom(void) { return rtnl_dereference(cfg80211_regdomain); }

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const struct ieee80211_regdomain *get_wiphy_regdom(struct wiphy *wiphy) { return rtnl_dereference(wiphy->regd); }

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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"; }

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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; }

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static void rcu_free_regdom(const struct ieee80211_regdomain *r) { if (!r) return; kfree_rcu((struct ieee80211_regdomain *)r, rcu_head); }

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static struct regulatory_request *get_last_request(void) { return rcu_dereference_rtnl(last_request); }

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/* 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]; 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); }

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Johannes Berg825.81%125.00%
Luis R. Rodriguez722.58%250.00%
Total31100.00%4100.00%


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); }

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Luis R. Rodriguez1959.38%266.67%
Arik Nemtsov1340.62%133.33%
Total32100.00%3100.00%


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); }

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Total38100.00%3100.00%


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); }

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Johannes Berg8487.50%777.78%
Luis R. Rodriguez1212.50%222.22%
Total96100.00%9100.00%

/* * 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; }

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Johannes Berg3487.18%777.78%
Luis R. Rodriguez512.82%222.22%
Total39100.00%9100.00%


bool is_world_regdom(const char *alpha2) { if (!alpha2) return false; return alpha2[0] == '0' && alpha2[1] == '0'; }

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Luis R. Rodriguez2987.88%125.00%
Johannes Berg412.12%375.00%
Total33100.00%4100.00%


static bool is_alpha2_set(const char *alpha2) { if (!alpha2) return false; return alpha2[0] && alpha2[1]; }

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Luis R. Rodriguez2790.00%125.00%
Johannes Berg310.00%375.00%
Total30100.00%4100.00%


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'; }

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Luis R. Rodriguez3188.57%240.00%
Johannes Berg411.43%360.00%
Total35100.00%5100.00%


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'; }

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Luis R. Rodriguez3497.14%266.67%
Johannes Berg12.86%133.33%
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static bool is_an_alpha2(const char *alpha2) { if (!alpha2) return false; return isalpha(alpha2[0]) && isalpha(alpha2[1]); }

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Luis R. Rodriguez2569.44%116.67%
Johannes Berg822.22%350.00%
John W. Linville25.56%116.67%
Tomas Winkler12.78%116.67%
Total36100.00%6100.00%


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]; }

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Luis R. Rodriguez4389.58%125.00%
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Tomas Winkler24.17%125.00%
Total48100.00%4100.00%


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); }

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Johannes Berg1333.33%342.86%
Luis R. Rodriguez1333.33%342.86%
John W. Linville1333.33%114.29%
Total39100.00%7100.00%

/* * 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; }

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static const struct ieee80211_regdomain * reg_copy_regd(const struct ieee80211_regdomain *src_regd) { struct ieee80211_regdomain *regd; int size_of_regd; unsigned int i; size_of_regd = sizeof(struct ieee80211_regdomain) + src_regd->n_reg_rules * sizeof(struct ieee80211_reg_rule); regd = kzalloc(size_of_regd, GFP_KERNEL); if (!regd) return 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; }

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#ifdef CONFIG_CFG80211_INTERNAL_REGDB 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(); }

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Luis R. Rodriguez45.00%116.67%
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static DECLARE_WORK(reg_regdb_work, reg_regdb_apply);
static int reg_query_builtin(const char *alpha2) { const struct ieee80211_regdomain *regdom = NULL; struct reg_regdb_apply_request *request; unsigned int i; for (i = 0; i < reg_regdb_size; i++) { if (alpha2_equal(alpha2, reg_regdb[i]->alpha2)) { regdom = reg_regdb[i]; break; } } if (!regdom) return -ENODATA; request = kzalloc(sizeof(struct reg_regdb_apply_request), GFP_KERNEL); if (!request) return -ENOMEM; request->regdom = reg_copy_regd(regdom); if (IS_ERR_OR_NULL(request->regdom)) { kfree(request); return -ENOMEM; } 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; }

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Luis R. Rodriguez116.92%233.33%
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/* Feel free to add any other sanity checks here */
static void reg_regdb_size_check(void) { /* We should ideally BUILD_BUG_ON() but then random builds would fail */ WARN_ONCE(!reg_regdb_size, "db.txt is empty, you should update it..."); }

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#else
static inline void reg_regdb_size_check(void) {}

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static inline int reg_query_builtin(const char *alpha2) { return -ENODATA; }

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#endif /* CONFIG_CFG80211_INTERNAL_REGDB */ #ifdef CONFIG_CFG80211_CRDA_SUPPORT /* Max number of consecutive attempts to communicate with CRDA */ #define REG_MAX_CRDA_TIMEOUTS 10 static u32 reg_crda_timeouts; static void crda_timeout_work(struct work_struct *work); static DECLARE_DELAYED_WORK(crda_timeout, crda_timeout_work);
static void crda_timeout_work(struct work_struct *work) { pr_debug("Timeout while waiting for CRDA to reply, restoring regulatory settings\n"); rtnl_lock(); reg_crda_timeouts++; restore_regulatory_settings(true); rtnl_unlock(); }

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static void cancel_crda_timeout(void) { cancel_delayed_work(&crda_timeout); }

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static void cancel_crda_timeout_sync(void) { cancel_delayed_work_sync(&crda_timeout); }

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static void reset_crda_timeouts(void) { reg_crda_timeouts = 0; }

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/* * 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; }

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Ilan Peer1611.27%114.29%
Thomas Petazzoni32.11%114.29%
Joe Perches21.41%114.29%
Total142100.00%7100.00%

#else
static inline void cancel_crda_timeout(void) {}

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static inline void cancel_crda_timeout_sync(void) {}

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static inline void reset_crda_timeouts(void) {}

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static inline int call_crda(const char *alpha2) { return -ENODATA; }

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#endif /* CONFIG_CFG80211_CRDA_SUPPORT */
static bool reg_query_database(struct regulatory_request *request) { /* query internal regulatory database (if it exists) */ if (reg_query_builtin(request->alpha2) == 0) return true; if (call_crda(request->alpha2) == 0) return true; return false; }

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Ilan Peer24.65%116.67%
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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); }

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Luis R. Rodriguez2357.50%233.33%
Johannes Berg1742.50%466.67%
Total40100.00%6100.00%


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(); }

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Janusz Dziedzic51100.00%1100.00%
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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; }

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Janusz Dziedzic20699.04%150.00%
Arik Nemtsov20.96%150.00%
Total208100.00%2100.00%


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; }

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Total102100.00%1100.00%

/* 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; }

Contributors

PersonTokensPropCommitsCommitProp
Luis R. Rodriguez8090.91%360.00%
Roel Kluin66.82%120.00%
Johannes Berg22.27%120.00%
Total88100.00%5100.00%


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; }

Contributors

PersonTokensPropCommitsCommitProp
Luis R. Rodriguez8797.75%266.67%
Johannes Berg22.25%133.33%
Total89100.00%3100.00%

/** * 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 10 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 ? 10 * 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 }

Contributors

PersonTokensPropCommitsCommitProp
John W. Linville4560.00%120.00%
Vladimir Kondratiev2026.67%120.00%
Luis R. Rodriguez1013.33%360.00%
Total75100.00%5100.00%

/* * 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; }

Contributors

PersonTokensPropCommitsCommitProp
Luis R. Rodriguez29100.00%1100.00%
Total29100.00%1100.00%

/* * 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; 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; 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 (!is_valid_reg_rule(intersected_rule)) return -EINVAL; return 0; }

Contributors

PersonTokensPropCommitsCommitProp
Luis R. Rodriguez20562.50%240.00%
Janusz Dziedzic12337.50%360.00%
Total328100.00%5100.00%

/* 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; }

Contributors

PersonTokensPropCommitsCommitProp
Eliad Peller113100.00%1100.00%
Total113100.00%1100.00%

/* 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)++; }

Contributors

PersonTokensPropCommitsCommitProp
Eliad Peller113100.00%1100.00%
Total113100.00%1100.00%

/** * 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, size_of_regd; 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; size_of_regd = sizeof(struct ieee80211_regdomain) + num_rules * sizeof(struct ieee80211_reg_rule); rd = kzalloc(size_of_regd, GFP_KERNEL); if (!rd) return NULL; for (x = 0; x < rd1->n_reg_rules; x++) { 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; }

Contributors

PersonTokensPropCommitsCommitProp
Luis R. Rodriguez28792.88%350.00%
Eliad Peller134.21%116.67%
Janusz Dziedzic82.59%116.67%
Johannes Berg10.32%116.67%
Total309100.00%6100.00%

/* * 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; return channel_flags; }

Contributors

PersonTokensPropCommitsCommitProp
Arik Nemtsov5046.73%233.33%
Luis R. Rodriguez3734.58%233.33%
Seth Forshee109.35%116.67%
David Spinadel109.35%116.67%
Total107100.00%6100.00%


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 * was in center_freq's band, that's enough, so lets * 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); }

Contributors

PersonTokensPropCommitsCommitProp
Luis R. Rodriguez12886.49%660.00%
Johannes Berg1510.14%220.00%
Matthias May42.70%110.00%
Rafał Miłecki10.68%110.00%
Total148100.00%10100.00%


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 struct ieee80211_reg_rule *reg_rule = NULL; u32 bw; for (bw = MHZ_TO_KHZ(20); bw >= min_bw; bw = bw / 2) { reg_rule = freq_reg_info_regd(center_freq, regd, bw); if (!IS_ERR(reg_rule)) return reg_rule; } return reg_rule; }

Contributors

PersonTokensPropCommitsCommitProp
Matthias May6270.45%116.67%
Luis R. Rodriguez1415.91%116.67%
Johannes Berg1213.64%466.67%
Total88100.00%6100.00%


const struct ieee80211_reg_rule *freq_reg_info(struct wiphy *wiphy, u32 center_freq) { return __freq_reg_info(wiphy, center_freq, MHZ_TO_KHZ(20)); }

Contributors

PersonTokensPropCommitsCommitProp
Matthias May2172.41%150.00%
Luis R. Rodriguez827.59%150.00%
Total29100.00%2100.00%

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 IE"; default: WARN_ON(1); return "bug"; } }

Contributors

PersonTokensPropCommitsCommitProp
Luis R. Rodriguez50100.00%2100.00%
Total50100.00%2100.00%

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, bw_flags = 0; freq_range = &reg_rule->freq_range; max_bandwidth_khz = freq_range->max_bandwidth_khz; /* 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, MHZ_TO_KHZ(chan->center_freq), MHZ_TO_KHZ(10))) bw_flags |= IEEE80211_CHAN_NO_10MHZ; if (!cfg80211_does_bw_fit_range(freq_range, MHZ_TO_KHZ(chan->center_freq), MHZ_TO_KHZ(20))) bw_flags |= IEEE80211_CHAN_NO_20MHZ; 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; }

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PersonTokensPropCommitsCommitProp
Michal Sojka18598.93%150.00%
Rafał Miłecki21.07%150.00%
Total187100.00%2100.00%

/* * 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) { u32 flags, bw_flags = 0; const struct ieee80211_reg_rule *reg_rule = NULL; const struct ieee80211_power_rule *power_rule = NULL; struct wiphy *request_wiphy = NULL; struct regulatory_request *lr = get_last_request(); const struct ieee80211_regdomain *regd; request_wiphy = wiphy_idx_to_wiphy(lr->wiphy_idx); flags = chan->orig_flags; reg_rule = freq_reg_info(wiphy, MHZ_TO_KHZ(chan->center_freq)); if (IS_ERR(reg_rule)) { /* * We will disable all channels that do not match our * received regulatory rule unless the hint is coming * 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(reg_rule) == -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 MHz for good\n", chan->center_freq); chan->orig_flags |= IEEE80211_CHAN_DISABLED; chan->flags = chan->orig_flags; } else { pr_debug("Disabling freq %d MHz\n", chan->center_freq); chan->flags |= IEEE80211_CHAN_DISABLED; } return; } 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; }

Contributors

PersonTokensPropCommitsCommitProp
Luis R. Rodriguez28861.28%1745.95%
Janusz Dziedzic7916.81%410.81%
Stanislaw Gruszka377.87%12.70%
Johannes Berg326.81%821.62%
Simon Wunderlich122.55%12.70%
Rajkumar Manoharan61.28%12.70%
Hong Wu51.06%12.70%
Felix Fietkau40.85%12.70%
Matthias May30.64%12.70%
Lucas De Marchi20.43%12.70%
Michal Sojka20.43%12.70%
Total470100.00%37100.00%


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]); }

Contributors

PersonTokensPropCommitsCommitProp
Luis R. Rodriguez4575.00%375.00%
Johannes Berg1525.00%125.00%
Total60100.00%4100.00%


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; }

Contributors

PersonTokensPropCommitsCommitProp
Luis R. Rodriguez2793.10%150.00%
Johannes Berg26.90%150.00%
Total29100.00%2100.00%


bool reg_last_request_cell_base(void) { return reg_request_cell_base(get_last_request()); }

Contributors

PersonTokensPropCommitsCommitProp
Luis R. Rodriguez1071.43%125.00%
Johannes Berg321.43%250.00%
Mohammed Shafi Shajakhan17.14%125.00%
Total14100.00%4100.00%

#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; }

Contributors

PersonTokensPropCommitsCommitProp
Luis R. Rodriguez3469.39%125.00%
Johannes Berg1530.61%375.00%
Total49100.00%4100.00%

/* Device specific check */
static bool reg_dev_ignore_cell_hint(struct wiphy *wiphy) { return !(wiphy->features & NL80211_FEATURE_CELL_BASE_REG_HINTS); }

Contributors

PersonTokensPropCommitsCommitProp
Luis R. Rodriguez2095.24%150.00%
Johannes Berg14.76%150.00%
Total21100.00%2100.00%

#else
static enum reg_request_treatment reg_ignore_cell_hint(struct regulatory_request *pending_request) { return REG_REQ_IGNORE; }

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PersonTokensPropCommitsCommitProp
Luis R. Rodriguez1280.00%133.33%
Johannes Berg320.00%266.67%
Total15100.00%3100.00%


static bool reg_dev_ignore_cell_hint(struct wiphy *wiphy) { return true; }

Contributors

PersonTokensPropCommitsCommitProp
Luis R. Rodriguez1392.86%150.00%
Johannes Berg17.14%150.00%
Total14100.00%2100.00%

#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; }

Contributors

PersonTokensPropCommitsCommitProp
Luis R. Rodriguez34100.00%2100.00%
Total34100.00%2100.00%


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; }

Contributors

PersonTokensPropCommitsCommitProp
Luis R. Rodriguez10878.83%969.23%
Johannes Berg1813.14%323.08%
Jonathan Doron118.03%17.69%
Total137100.00%13100.00%


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; }

Contributors

PersonTokensPropCommitsCommitProp
Luis R. Rodriguez84100.00%5100.00%
Total84100.00%5100.00%


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(chan->center_freq != reg_beacon->chan.center_freq)) 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.center_freq = chan->center_freq; chan_before.flags = chan->flags; 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); }

Contributors

PersonTokensPropCommitsCommitProp
Luis R. Rodriguez15999.38%787.50%
Johannes Berg10.62%112.50%
Total160100.00%8100.00%

/* * 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); }

Contributors

PersonTokensPropCommitsCommitProp
Luis R. Rodriguez77100.00%1100.00%
Total77100.00%1100.00%

/* * 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); } }

Contributors

PersonTokensPropCommitsCommitProp
Luis R. Rodriguez87100.00%1100.00%
Total87100.00%1100.00%

/* 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); }

Contributors

PersonTokensPropCommitsCommitProp
Luis R. Rodriguez23100.00%2100.00%
Total23100.00%2100.00%


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; }

Contributors

PersonTokensPropCommitsCommitProp
Luis R. Rodriguez4285.71%250.00%
Felix Fietkau48.16%125.00%
Johannes Berg36.12%125.00%
Total49100.00%4100.00%


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; unsigned int i; 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; } /* * 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)) channel->flags |= IEEE80211_CHAN_NO_HT40MINUS; else channel->flags &= ~IEEE80211_CHAN_NO_HT40MINUS; if (!is_ht40_allowed(channel_after)) channel->flags |= IEEE80211_CHAN_NO_HT40PLUS; else channel->flags &= ~IEEE80211_CHAN_NO_HT40PLUS; }

Contributors

PersonTokensPropCommitsCommitProp
Luis R. Rodriguez15789.71%360.00%
Johannes Berg1810.29%240.00%
Total175100.00%5100.00%


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]); }

Contributors

PersonTokensPropCommitsCommitProp
Luis R. Rodriguez4074.07%150.00%
Johannes Berg1425.93%150.00%
Total54100.00%2100.00%


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]); }

Contributors

PersonTokensPropCommitsCommitProp
Luis R. Rodriguez4086.96%133.33%
Johannes Berg613.04%266.67%
Total46100.00%3100.00%


static void reg_call_notifier(struct wiphy *wiphy, struct regulatory_request *request) { if (wiphy->reg_notifier) wiphy->reg_notifier(wiphy, request); }

Contributors

PersonTokensPropCommitsCommitProp
Luis R. Rodriguez31100.00%1100.00%
Total31100.00%1100.00%


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; }

Contributors

PersonTokensPropCommitsCommitProp
Arik Nemtsov256100.00%4100.00%
Total256100.00%4100.00%


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); }

Contributors

PersonTokensPropCommitsCommitProp
Arik Nemtsov5398.15%150.00%
Johannes Berg11.85%150.00%
Total54100.00%2100.00%


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(); }

Contributors

PersonTokensPropCommitsCommitProp
Arik Nemtsov5598.21%150.00%
Johannes Berg11.79%150.00%
Total56100.00%2100.00%


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)); }

Contributors

PersonTokensPropCommitsCommitProp
Arik Nemtsov22100.00%1100.00%
Total22100.00%1100.00%


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) 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); }

Contributors

PersonTokensPropCommitsCommitProp
Luis R. Rodriguez9080.36%440.00%
Johannes Berg1916.96%440.00%
Sven Neumann32.68%220.00%
Total112100.00%10100.00%


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(); }

Contributors

PersonTokensPropCommitsCommitProp
Sven Neumann3162.00%120.00%
Rajkumar Manoharan1326.00%120.00%
Johannes Berg36.00%240.00%
Arik Nemtsov36.00%120.00%
Total50100.00%5100.00%


static void handle_channel_custom(struct wiphy *wiphy, struct ieee80211_channel *chan, const struct ieee80211_regdomain *regd) { u32 bw_flags = 0; const struct ieee80211_reg_rule *reg_rule = NULL; const struct ieee80211_power_rule *power_rule = NULL; u32 bw; for (bw = MHZ_TO_KHZ(20); bw >= MHZ_TO_KHZ(5); bw = bw / 2) { reg_rule = freq_reg_info_regd(MHZ_TO_KHZ(chan->center_freq), regd, bw); if (!IS_ERR(reg_rule)) break; } if (IS_ERR(reg_rule)) { pr_debug("Disabling freq %d MHz as custom regd has no rule that fits it\n", chan->center_freq); 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; }

Contributors

PersonTokensPropCommitsCommitProp
Luis R. Rodriguez12743.34%527.78%
Arik Nemtsov10234.81%316.67%
Matthias May4013.65%15.56%
Johannes Berg124.10%527.78%
Janusz Dziedzic51.71%15.56%
Felix Fietkau41.37%15.56%
Michal Sojka20.68%15.56%
Rostislav Lisovy10.34%15.56%
Total293100.00%18100.00%


static void handle_band_custom(struct wiphy *wiphy, struct ieee80211_supported_band *sband, const struct ieee80211_regdomain *regd) { unsigned int i; if (!sband) return; for (i = 0; i < sband->n_channels; i++) handle_channel_custom(wiphy, &sband->channels[i], regd); }

Contributors

PersonTokensPropCommitsCommitProp
Luis R. Rodriguez4877.42%150.00%
Johannes Berg1422.58%150.00%
Total62100.00%2100.00%

/* 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); }

Contributors

PersonTokensPropCommitsCommitProp
Luis R. Rodriguez8891.67%562.50%
Johannes Berg88.33%337.50%
Total96100.00%8100.00%

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); }

Contributors

PersonTokensPropCommitsCommitProp
Luis R. Rodriguez6396.92%150.00%
Johannes Berg23.08%150.00%
Total65100.00%2100.00%

/** * reg_process_hint_core - process core regulatory requests * @pending_request: a pending core regulatory request * * The wireless subsystem can use this function to process * a regulatory request issued by the regulatory core. */
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; }

Contributors

PersonTokensPropCommitsCommitProp
Luis R. Rodriguez2659.09%240.00%
Johannes Berg1840.91%360.00%
Total44100.00%5100.00%


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; }

Contributors

PersonTokensPropCommitsCommitProp
Luis R. Rodriguez10285.71%975.00%
Johannes Berg1714.29%325.00%
Total119100.00%12100.00%

/** * 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; }

Contributors

PersonTokensPropCommitsCommitProp
Luis R. Rodriguez7377.66%562.50%
Johannes Berg2122.34%337.50%
Total94100.00%8100.00%


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; }

Contributors

PersonTokensPropCommitsCommitProp
Luis R. Rodriguez68100.00%1100.00%
Total68100.00%1100.00%

/** * reg_process_hint_driver - process driver regulatory requests * @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; }

Contributors

PersonTokensPropCommitsCommitProp
Luis R. Rodriguez11875.16%116.67%
Johannes Berg2415.29%466.67%
Arik Nemtsov159.55%116.67%
Total157100.00%6100.00%


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; }

Contributors

PersonTokensPropCommitsCommitProp
Luis R. Rodriguez12484.35%866.67%
Johannes Berg2315.65%433.33%
Total147100.00%12100.00%

/** * reg_process_hint_country_ie - process regulatory requests from country IEs * @country_ie_request: a regulatory request from a country IE * * The wireless subsystem can use this function to process * a regulatory request issued by a country Information Element. * * Returns one of the different reg request treatment values. */
static enum reg_request_treatment reg_process_hint_country_ie(struct wiphy *wiphy, struct regulatory_request *country_ie_request) { enum reg_request_treatment treatment; treatment = __reg_process_hint_country_ie(wiphy, country_ie_request); switch (treatment) { case REG_REQ_OK: break; case REG_REQ_IGNORE: 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 IEs"); 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; }

Contributors

PersonTokensPropCommitsCommitProp
Luis R. Rodriguez6966.99%635.29%
Johannes Berg3332.04%1058.82%
Arik Nemtsov10.97%15.88%
Total103100.00%17100.00%

/* This processes *all* regulatory hints */
static void reg_process_hint(struct regulatory_request *reg_request) { struct wiphy *wiphy = NULL; enum reg_request_treatment treatment; if (reg_request->wiphy_idx != WIPHY_IDX_INVALID) wiphy = wiphy_idx_to_wiphy(reg_request->wiphy_idx); switch (reg_request->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", reg_request->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, reg_request->initiator); reg_check_channels(); } return; out_free: reg_free_request(reg_request); }

Contributors

PersonTokensPropCommitsCommitProp
Luis R. Rodriguez11561.50%1150.00%
Johannes Berg3920.86%731.82%
Ilan Peer2613.90%14.55%
Arik Nemtsov63.21%29.09%
John W. Linville10.53%14.55%
Total187100.00%22100.00%


static bool reg_only_self_managed_wiphys(void) { struct cfg80211_registered_device *rdev; struct wiphy *wiphy; bool self_managed_found = false; ASSERT_RTNL(); list_for_each_entry(rdev, &cfg80211_rdev_list, list) { wiphy = &rdev->wiphy; if (wiphy->regulatory_flags & REGULATORY_WIPHY_SELF_MANAGED) self_managed_found = true; else return false; } /* make sure at least one self-managed wiphy exists */ return self_managed_found; }

Contributors

PersonTokensPropCommitsCommitProp
Arik Nemtsov63100.00%1100.00%
Total63100.00%1100.00%

/* * 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) { reg_process_hint(lr); 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); if (reg_only_self_managed_wiphys()) { reg_free_request(reg_request); return; } 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); }

Contributors

PersonTokensPropCommitsCommitProp
Luis R. Rodriguez7652.41%654.55%
Ben Rosefeld3826.21%19.09%
Johannes Berg1812.41%327.27%
Arik Nemtsov138.97%19.09%
Total145100.00%11100.00%

/* 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); }

Contributors

PersonTokensPropCommitsCommitProp
Luis R. Rodriguez8195.29%266.67%
Johannes Berg44.71%133.33%
Total85100.00%3100.00%


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(); }

Contributors

PersonTokensPropCommitsCommitProp
Jonathan Doron19198.96%150.00%
Johannes Berg21.04%150.00%
Total193100.00%2100.00%


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(); }

Contributors

PersonTokensPropCommitsCommitProp
Luis R. Rodriguez1765.38%250.00%
Johannes Berg623.08%125.00%
Jonathan Doron311.54%125.00%
Total26100.00%4100.00%


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); }

Contributors

PersonTokensPropCommitsCommitProp
Luis R. Rodriguez4054.05%150.00%
John W. Linville3445.95%150.00%
Total74100.00%2100.00%

/* * 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; queue_regulatory_request(request); return 0; }

Contributors

PersonTokensPropCommitsCommitProp
Luis R. Rodriguez76100.00%3100.00%
Total76100.00%3100.00%

/* 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; 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; }

Contributors

PersonTokensPropCommitsCommitProp
Luis R. Rodriguez9487.85%450.00%
Johannes Berg1110.28%337.50%
Ilan Peer21.87%112.50%
Total107100.00%8100.00%


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; }

Contributors

PersonTokensPropCommitsCommitProp
Ilan Peer61100.00%3100.00%
Total61100.00%3100.00%


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(); }

Contributors

PersonTokensPropCommitsCommitProp
Ilan Peer46100.00%2100.00%
Total46100.00%2100.00%

/* 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; }

Contributors

PersonTokensPropCommitsCommitProp
Luis R. Rodriguez10288.70%350.00%
Johannes Berg119.57%233.33%
Ilan Peer21.74%116.67%
Total115100.00%6100.00%

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(); }

Contributors

PersonTokensPropCommitsCommitProp
Luis R. Rodriguez16571.74%952.94%
Johannes Berg6327.39%741.18%
Ilan Peer20.87%15.88%
Total230100.00%17100.00%


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"); }

Contributors

PersonTokensPropCommitsCommitProp
Luis R. Rodriguez18995.45%250.00%
Johannes Berg94.55%250.00%
Total198100.00%4100.00%


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; } } }

Contributors

PersonTokensPropCommitsCommitProp
Rajkumar Manoharan10793.04%133.33%
Paul Stewart65.22%133.33%
Johannes Berg21.74%133.33%
Total115100.00%3100.00%

/* * 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 does * not need to be remembered. */
static void restore_regulatory_settings(bool reset_user) { 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); } 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); }

Contributors

PersonTokensPropCommitsCommitProp
Luis R. Rodriguez17460.63%529.41%
Rajkumar Manoharan3110.80%15.88%
Ilan Peer3110.80%317.65%
Dmitry Shmidt2910.10%15.88%
Jonathan Doron113.83%15.88%
Johannes Berg103.48%529.41%
Maciej S. Szmigiero10.35%15.88%
Total287100.00%17100.00%


void regulatory_hint_disconnect(void) { pr_debug("All devices are disconnected, going to restore regulatory settings\n"); restore_regulatory_settings(false); }

Contributors

PersonTokensPropCommitsCommitProp
Luis R. Rodriguez1588.24%133.33%
Johannes Berg211.76%266.67%
Total17100.00%3100.00%


static bool freq_is_chan_12_13_14(u16 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; }

Contributors

PersonTokensPropCommitsCommitProp
Luis R. Rodriguez3886.36%133.33%
Johannes Berg36.82%133.33%
Bruno Randolf36.82%133.33%
Total44100.00%3100.00%


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 (beacon_chan->center_freq == pending_beacon->chan.center_freq) return true; return false; }

Contributors

PersonTokensPropCommitsCommitProp
Luis R. Rodriguez42100.00%1100.00%
Total42100.00%1100.00%


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 MHz (Ch %d) on %s\n", beacon_chan->center_freq, ieee80211_frequency_to_channel(beacon_chan->center_freq), 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; }

Contributors

PersonTokensPropCommitsCommitProp
Luis R. Rodriguez17298.29%240.00%
Johannes Berg31.71%360.00%
Total175100.00%5100.00%


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, %d 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); } }

Contributors

PersonTokensPropCommitsCommitProp
Luis R. Rodriguez10845.38%218.18%
Janusz Dziedzic10744.96%327.27%
Johannes Berg187.56%327.27%
Dave Young31.26%19.09%
Tony Vroon10.42%19.09%
Tomas Winkler10.42%19.09%
Total238100.00%11100.00%


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 uknown DFS master region: %d\n", dfs_region); return false; } }

Contributors

PersonTokensPropCommitsCommitProp
Luis R. Rodriguez4097.56%266.67%
Johannes Berg12.44%133.33%
Total41100.00%3100.00%


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); }

Contributors

PersonTokensPropCommitsCommitProp
Luis R. Rodriguez12263.54%746.67%
Johannes Berg5227.08%533.33%
Dave Young84.17%16.67%
Joe Perches52.60%16.67%
Tony Vroon52.60%16.67%
Total192100.00%15100.00%


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); }

Contributors

PersonTokensPropCommitsCommitProp
Luis R. Rodriguez3494.44%133.33%
Dave Young12.78%133.33%
Joe Perches12.78%133.33%
Total36100.00%3100.00%


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; }

Contributors

PersonTokensPropCommitsCommitProp
Luis R. Rodriguez34100.00%1100.00%
Total34100.00%1100.00%


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; }

Contributors

PersonTokensPropCommitsCommitProp
Luis R. Rodriguez11988.81%150.00%
Dave Young1511.19%150.00%
Total134100.00%2100.00%


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; }

Contributors

PersonTokensPropCommitsCommitProp
Luis R. Rodriguez16669.75%1152.38%
Johannes Berg4217.65%628.57%
Dave Young156.30%14.76%
Larry Finger135.46%14.76%
Kalle Valo10.42%14.76%
Joe Perches10.42%14.76%
Total238100.00%21100.00%


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; }

Contributors

PersonTokensPropCommitsCommitProp
Luis R. Rodriguez11286.82%562.50%
Dave Young1511.63%112.50%
Johannes Berg10.78%112.50%
Larry Finger10.78%112.50%
Total129100.00%8100.00%

/* * 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 (!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: 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); } 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; }

Contributors

PersonTokensPropCommitsCommitProp
Luis R. Rodriguez12454.63%939.13%
Johannes Berg5624.67%939.13%
Janusz Dziedzic2310.13%14.35%
Ilan Peer114.85%14.35%
Kalle Valo73.08%14.35%
Ola Olsson52.20%14.35%
John W. Linville10.44%14.35%
Total227100.00%23100.00%


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; }

Contributors

PersonTokensPropCommitsCommitProp
Jonathan Doron14596.03%150.00%
Arik Nemtsov63.97%150.00%
Total151100.00%2100.00%


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; }

Contributors

PersonTokensPropCommitsCommitProp
Arik Nemtsov3175.61%150.00%
Jonathan Doron1024.39%150.00%
Total41100.00%2100.00%

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; }

Contributors

PersonTokensPropCommitsCommitProp
Arik Nemtsov44100.00%1100.00%
Total44100.00%1100.00%

EXPORT_SYMBOL(regulatory_set_wiphy_regd_sync_rtnl);
void wiphy_regulatory_register(struct wiphy *wiphy) { struct regulatory_request *lr; /* self-managed devices ignore external hints */ if (wiphy->regulatory_flags & REGULATORY_WIPHY_SELF_MANAGED) wiphy->regulatory_flags |= REGULATORY_DISABLE_BEACON_HINTS | REGULATORY_COUNTRY_IE_IGNORE; if (!reg_dev_ignore_cell_hint(wiphy)) reg_num_devs_support_basehint++; lr = get_last_request(); wiphy_update_regulatory(wiphy, lr->initiator); }

Contributors

PersonTokensPropCommitsCommitProp
Luis R. Rodriguez2747.37%360.00%
Jonathan Doron1729.82%120.00%
Arik Nemtsov1322.81%120.00%
Total57100.00%5100.00%


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; }

Contributors

PersonTokensPropCommitsCommitProp
Luis R. Rodriguez5662.22%545.45%
Johannes Berg2628.89%436.36%
Chris Wright77.78%19.09%
Monam Agarwal11.11%19.09%
Total90100.00%11100.00%

/* * See http://www.fcc.gov/document/5-ghz-unlicensed-spectrum-unii, for * UNII band definitions */
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; return -EINVAL; }

Contributors

PersonTokensPropCommitsCommitProp
Ilan Peer82100.00%1100.00%
Total82100.00%1100.00%


bool regulatory_indoor_allowed(void) { return reg_is_indoor; }

Contributors

PersonTokensPropCommitsCommitProp
Ilan Peer10100.00%1100.00%
Total10100.00%1100.00%


int __init regulatory_init(void) { int err = 0; 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); reg_regdb_size_check(); rcu_assign_pointer(cfg80211_regdomain, cfg80211_world_regdom); user_alpha2[0] = '9'; user_alpha2[1] = '7'; /* We always try to get an update for the static regdomain */ err = regulatory_hint_core(cfg80211_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; }

Contributors

PersonTokensPropCommitsCommitProp
Luis R. Rodriguez9366.91%956.25%
Johannes Berg3021.58%318.75%
Ola Olsson75.04%16.25%
Ilan Peer64.32%16.25%
Joe Perches21.44%16.25%
Uwe Kleine-König10.72%16.25%
Total139100.00%16100.00%


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); } }

Contributors

PersonTokensPropCommitsCommitProp
Luis R. Rodriguez12386.62%753.85%
Johannes Berg139.15%538.46%
Arik Nemtsov64.23%17.69%
Total142100.00%13100.00%


Overall Contributors

PersonTokensPropCommitsCommitProp
Luis R. Rodriguez670955.83%10945.04%
Johannes Berg160113.32%5422.31%
Arik Nemtsov9057.53%145.79%
Janusz Dziedzic6025.01%62.48%
Jonathan Doron3933.27%10.41%
John W. Linville3753.12%62.48%
Ilan Peer3152.62%93.72%
Eliad Peller2412.01%10.41%
Michal Sojka1891.57%10.41%
Rajkumar Manoharan1571.31%31.24%
Matthias May1301.08%10.41%
Dave Young570.47%10.41%
Vladimir Kondratiev480.40%20.83%
Ben Rosefeld380.32%10.41%
Stanislaw Gruszka370.31%10.41%
Sven Neumann340.28%31.24%
Dmitry Shmidt290.24%10.41%
Joe Perches180.15%10.41%
Larry Finger140.12%10.41%
Simon Wunderlich120.10%10.41%
Felix Fietkau120.10%20.83%
Ola Olsson120.10%10.41%
Seth Forshee100.08%10.41%
David Spinadel100.08%10.41%
Kalle Valo80.07%10.41%
Chris Wright70.06%10.41%
Roel Kluin60.05%10.41%
Paul Gortmaker60.05%20.83%
Paul Stewart60.05%10.41%
Tony Vroon60.05%10.41%
Hong Wu50.04%10.41%
Tomas Winkler40.03%10.41%
Bruno Randolf30.02%10.41%
Rafał Miłecki30.02%10.41%
Thomas Petazzoni30.02%10.41%
Tejun Heo30.02%10.41%
Lucas De Marchi20.02%10.41%
Uwe Kleine-König10.01%10.41%
Jason Abele10.01%10.41%
Rostislav Lisovy10.01%10.41%
Monam Agarwal10.01%10.41%
Mohammed Shafi Shajakhan10.01%10.41%
Maciej S. Szmigiero10.01%10.41%
Total12016100.00%242100.00%
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