net/wireless/core.h - kernel/msm-4.9 - Gitiles

 /*
  * Wireless configuration interface internals.
  *
  * Copyright 2006-2010	Johannes Berg <johannes@sipsolutions.net>
  */
 #ifndef __NET_WIRELESS_CORE_H
 #define __NET_WIRELESS_CORE_H
 #include <linux/mutex.h>
 #include <linux/list.h>
 #include <linux/netdevice.h>
 #include <linux/kref.h>
 #include <linux/rbtree.h>
 #include <linux/debugfs.h>
 #include <linux/rfkill.h>
 #include <linux/workqueue.h>
 #include <linux/rtnetlink.h>
 #include <net/genetlink.h>
 #include <net/cfg80211.h>
 #include "reg.h"

 struct cfg80211_registered_device {
 	const struct cfg80211_ops *ops;
 	struct list_head list;
 	/* we hold this mutex during any call so that
 	 * we cannot do multiple calls at once, and also
 	 * to avoid the deregister call to proceed while
 	 * any call is in progress */
 	struct mutex mtx;

 	/* rfkill support */
 	struct rfkill_ops rfkill_ops;
 	struct rfkill *rfkill;
 	struct work_struct rfkill_sync;

 	/* ISO / IEC 3166 alpha2 for which this device is receiving
 	 * country IEs on, this can help disregard country IEs from APs
 	 * on the same alpha2 quickly. The alpha2 may differ from
 	 * cfg80211_regdomain's alpha2 when an intersection has occurred.
 	 * If the AP is reconfigured this can also be used to tell us if
 	 * the country on the country IE changed. */
 	char country_ie_alpha2[2];

 	/* If a Country IE has been received this tells us the environment
 	 * which its telling us its in. This defaults to ENVIRON_ANY */
 	enum environment_cap env;

 	/* wiphy index, internal only */
 	int wiphy_idx;

 	/* associated wireless interfaces */
 	struct mutex devlist_mtx;
 	/* protected by devlist_mtx or RCU */
 	struct list_head wdev_list;
 	int devlist_generation, wdev_id;
 	int opencount; /* also protected by devlist_mtx */
 	wait_queue_head_t dev_wait;

 	struct list_head beacon_registrations;
 	spinlock_t beacon_registrations_lock;

 	/* protected by RTNL only */
 	int num_running_ifaces;
 	int num_running_monitor_ifaces;

 	/* BSSes/scanning */
 	spinlock_t bss_lock;
 	struct list_head bss_list;
 	struct rb_root bss_tree;
 	u32 bss_generation;
 	struct cfg80211_scan_request *scan_req; /* protected by RTNL */
 	struct cfg80211_sched_scan_request *sched_scan_req;
 	unsigned long suspend_at;
 	struct work_struct scan_done_wk;
 	struct work_struct sched_scan_results_wk;

 	struct mutex sched_scan_mtx;

 #ifdef CONFIG_NL80211_TESTMODE
 	struct genl_info *testmode_info;
 #endif

 	struct work_struct conn_work;
 	struct work_struct event_work;

 	struct cfg80211_wowlan *wowlan;

 	/* must be last because of the way we do wiphy_priv(),
 	 * and it should at least be aligned to NETDEV_ALIGN */
 	struct wiphy wiphy __attribute__((__aligned__(NETDEV_ALIGN)));
 };

 static inline
 struct cfg80211_registered_device *wiphy_to_dev(struct wiphy *wiphy)
 {
 	BUG_ON(!wiphy);
 	return container_of(wiphy, struct cfg80211_registered_device, wiphy);
 }

 /* Note 0 is valid, hence phy0 */
 static inline
 bool wiphy_idx_valid(int wiphy_idx)
 {
 	return wiphy_idx >= 0;
 }

 static inline void
 cfg80211_rdev_free_wowlan(struct cfg80211_registered_device *rdev)
 {
 	int i;

 	if (!rdev->wowlan)
 		return;
 	for (i = 0; i < rdev->wowlan->n_patterns; i++)
 		kfree(rdev->wowlan->patterns[i].mask);
 	kfree(rdev->wowlan->patterns);
 	kfree(rdev->wowlan);
 }

 extern struct workqueue_struct *cfg80211_wq;
 extern struct mutex cfg80211_mutex;
 extern struct list_head cfg80211_rdev_list;
 extern int cfg80211_rdev_list_generation;

 static inline void assert_cfg80211_lock(void)
 {
 	lockdep_assert_held(&cfg80211_mutex);
 }

 /*
  * You can use this to mark a wiphy_idx as not having an associated wiphy.
  * It guarantees cfg80211_rdev_by_wiphy_idx(wiphy_idx) will return NULL
  */
 #define WIPHY_IDX_STALE -1

 struct cfg80211_internal_bss {
 	struct list_head list;
 	struct rb_node rbn;
 	unsigned long ts;
 	struct kref ref;
 	atomic_t hold;

 	/* must be last because of priv member */
 	struct cfg80211_bss pub;
 };

 static inline struct cfg80211_internal_bss *bss_from_pub(struct cfg80211_bss *pub)
 {
 	return container_of(pub, struct cfg80211_internal_bss, pub);
 }

 static inline void cfg80211_hold_bss(struct cfg80211_internal_bss *bss)
 {
 	atomic_inc(&bss->hold);
 }

 static inline void cfg80211_unhold_bss(struct cfg80211_internal_bss *bss)
 {
 	int r = atomic_dec_return(&bss->hold);
 	WARN_ON(r < 0);
 }


 struct cfg80211_registered_device *cfg80211_rdev_by_wiphy_idx(int wiphy_idx);
 int get_wiphy_idx(struct wiphy *wiphy);

 /* requires cfg80211_rdev_mutex to be held! */
 struct wiphy *wiphy_idx_to_wiphy(int wiphy_idx);

 /* identical to cfg80211_get_dev_from_info but only operate on ifindex */
 extern struct cfg80211_registered_device *
 cfg80211_get_dev_from_ifindex(struct net *net, int ifindex);

 int cfg80211_switch_netns(struct cfg80211_registered_device *rdev,
 			  struct net *net);

 static inline void cfg80211_lock_rdev(struct cfg80211_registered_device *rdev)
 {
 	mutex_lock(&rdev->mtx);
 }

 static inline void cfg80211_unlock_rdev(struct cfg80211_registered_device *rdev)
 {
 	BUG_ON(IS_ERR(rdev) || !rdev);
 	mutex_unlock(&rdev->mtx);
 }

 static inline void wdev_lock(struct wireless_dev *wdev)
 	__acquires(wdev)
 {
 	mutex_lock(&wdev->mtx);
 	__acquire(wdev->mtx);
 }

 static inline void wdev_unlock(struct wireless_dev *wdev)
 	__releases(wdev)
 {
 	__release(wdev->mtx);
 	mutex_unlock(&wdev->mtx);
 }

 #define ASSERT_RDEV_LOCK(rdev) lockdep_assert_held(&(rdev)->mtx)
 #define ASSERT_WDEV_LOCK(wdev) lockdep_assert_held(&(wdev)->mtx)

 static inline bool cfg80211_has_monitors_only(struct cfg80211_registered_device *rdev)
 {
 	ASSERT_RTNL();

 	return rdev->num_running_ifaces == rdev->num_running_monitor_ifaces &&
 	       rdev->num_running_ifaces > 0;
 }

 enum cfg80211_event_type {
 	EVENT_CONNECT_RESULT,
 	EVENT_ROAMED,
 	EVENT_DISCONNECTED,
 	EVENT_IBSS_JOINED,
 };

 struct cfg80211_event {
 	struct list_head list;
 	enum cfg80211_event_type type;

 	union {
 		struct {
 			u8 bssid[ETH_ALEN];
 			const u8 *req_ie;
 			const u8 *resp_ie;
 			size_t req_ie_len;
 			size_t resp_ie_len;
 			u16 status;
 		} cr;
 		struct {
 			const u8 *req_ie;
 			const u8 *resp_ie;
 			size_t req_ie_len;
 			size_t resp_ie_len;
 			struct cfg80211_bss *bss;
 		} rm;
 		struct {
 			const u8 *ie;
 			size_t ie_len;
 			u16 reason;
 		} dc;
 		struct {
 			u8 bssid[ETH_ALEN];
 		} ij;
 	};
 };

 struct cfg80211_cached_keys {
 	struct key_params params[6];
 	u8 data[6][WLAN_MAX_KEY_LEN];
 	int def, defmgmt;
 };

 enum cfg80211_chan_mode {
 	CHAN_MODE_UNDEFINED,
 	CHAN_MODE_SHARED,
 	CHAN_MODE_EXCLUSIVE,
 };

 struct cfg80211_beacon_registration {
 	struct list_head list;
 	u32 nlportid;
 };

 /* free object */
 extern void cfg80211_dev_free(struct cfg80211_registered_device *rdev);

 extern int cfg80211_dev_rename(struct cfg80211_registered_device *rdev,
 			       char *newname);

 void ieee80211_set_bitrate_flags(struct wiphy *wiphy);

 void cfg80211_bss_expire(struct cfg80211_registered_device *dev);
 void cfg80211_bss_age(struct cfg80211_registered_device *dev,
                       unsigned long age_secs);

 /* IBSS */
 int __cfg80211_join_ibss(struct cfg80211_registered_device *rdev,
 			 struct net_device *dev,
 			 struct cfg80211_ibss_params *params,
 			 struct cfg80211_cached_keys *connkeys);
 int cfg80211_join_ibss(struct cfg80211_registered_device *rdev,
 		       struct net_device *dev,
 		       struct cfg80211_ibss_params *params,
 		       struct cfg80211_cached_keys *connkeys);
 void cfg80211_clear_ibss(struct net_device *dev, bool nowext);
 int __cfg80211_leave_ibss(struct cfg80211_registered_device *rdev,
 			  struct net_device *dev, bool nowext);
 int cfg80211_leave_ibss(struct cfg80211_registered_device *rdev,
 			struct net_device *dev, bool nowext);
 void __cfg80211_ibss_joined(struct net_device *dev, const u8 *bssid);
 int cfg80211_ibss_wext_join(struct cfg80211_registered_device *rdev,
 			    struct wireless_dev *wdev);

 /* mesh */
 extern const struct mesh_config default_mesh_config;
 extern const struct mesh_setup default_mesh_setup;
 int __cfg80211_join_mesh(struct cfg80211_registered_device *rdev,
 			 struct net_device *dev,
 			 struct mesh_setup *setup,
 			 const struct mesh_config *conf);
 int cfg80211_join_mesh(struct cfg80211_registered_device *rdev,
 		       struct net_device *dev,
 		       struct mesh_setup *setup,
 		       const struct mesh_config *conf);
 int cfg80211_leave_mesh(struct cfg80211_registered_device *rdev,
 			struct net_device *dev);
 int cfg80211_set_mesh_channel(struct cfg80211_registered_device *rdev,
 			      struct wireless_dev *wdev,
 			      struct cfg80211_chan_def *chandef);

 /* AP */
 int cfg80211_stop_ap(struct cfg80211_registered_device *rdev,
 		     struct net_device *dev);

 /* MLME */
 int __cfg80211_mlme_auth(struct cfg80211_registered_device *rdev,
 			 struct net_device *dev,
 			 struct ieee80211_channel *chan,
 			 enum nl80211_auth_type auth_type,
 			 const u8 *bssid,
 			 const u8 *ssid, int ssid_len,
 			 const u8 *ie, int ie_len,
 			 const u8 *key, int key_len, int key_idx,
 			 const u8 *sae_data, int sae_data_len);
 int cfg80211_mlme_auth(struct cfg80211_registered_device *rdev,
 		       struct net_device *dev, struct ieee80211_channel *chan,
 		       enum nl80211_auth_type auth_type, const u8 *bssid,
 		       const u8 *ssid, int ssid_len,
 		       const u8 *ie, int ie_len,
 		       const u8 *key, int key_len, int key_idx,
 		       const u8 *sae_data, int sae_data_len);
 int __cfg80211_mlme_assoc(struct cfg80211_registered_device *rdev,
 			  struct net_device *dev,
 			  struct ieee80211_channel *chan,
 			  const u8 *bssid, const u8 *prev_bssid,
 			  const u8 *ssid, int ssid_len,
 			  const u8 *ie, int ie_len, bool use_mfp,
 			  struct cfg80211_crypto_settings *crypt,
 			  u32 assoc_flags, struct ieee80211_ht_cap *ht_capa,
 			  struct ieee80211_ht_cap *ht_capa_mask);
 int cfg80211_mlme_assoc(struct cfg80211_registered_device *rdev,
 			struct net_device *dev, struct ieee80211_channel *chan,
 			const u8 *bssid, const u8 *prev_bssid,
 			const u8 *ssid, int ssid_len,
 			const u8 *ie, int ie_len, bool use_mfp,
 			struct cfg80211_crypto_settings *crypt,
 			u32 assoc_flags, struct ieee80211_ht_cap *ht_capa,
 			struct ieee80211_ht_cap *ht_capa_mask);
 int __cfg80211_mlme_deauth(struct cfg80211_registered_device *rdev,
 			   struct net_device *dev, const u8 *bssid,
 			   const u8 *ie, int ie_len, u16 reason,
 			   bool local_state_change);
 int cfg80211_mlme_deauth(struct cfg80211_registered_device *rdev,
 			 struct net_device *dev, const u8 *bssid,
 			 const u8 *ie, int ie_len, u16 reason,
 			 bool local_state_change);
 int cfg80211_mlme_disassoc(struct cfg80211_registered_device *rdev,
 			   struct net_device *dev, const u8 *bssid,
 			   const u8 *ie, int ie_len, u16 reason,
 			   bool local_state_change);
 void cfg80211_mlme_down(struct cfg80211_registered_device *rdev,
 			struct net_device *dev);
 void __cfg80211_connect_result(struct net_device *dev, const u8 *bssid,
 			       const u8 *req_ie, size_t req_ie_len,
 			       const u8 *resp_ie, size_t resp_ie_len,
 			       u16 status, bool wextev,
 			       struct cfg80211_bss *bss);
 int cfg80211_mlme_register_mgmt(struct wireless_dev *wdev, u32 snd_pid,
 				u16 frame_type, const u8 *match_data,
 				int match_len);
 void cfg80211_mlme_unregister_socket(struct wireless_dev *wdev, u32 nlpid);
 void cfg80211_mlme_purge_registrations(struct wireless_dev *wdev);
 int cfg80211_mlme_mgmt_tx(struct cfg80211_registered_device *rdev,
 			  struct wireless_dev *wdev,
 			  struct ieee80211_channel *chan, bool offchan,
 			  unsigned int wait, const u8 *buf, size_t len,
 			  bool no_cck, bool dont_wait_for_ack, u64 *cookie);
 void cfg80211_oper_and_ht_capa(struct ieee80211_ht_cap *ht_capa,
 			       const struct ieee80211_ht_cap *ht_capa_mask);

 /* SME */
 int __cfg80211_connect(struct cfg80211_registered_device *rdev,
 		       struct net_device *dev,
 		       struct cfg80211_connect_params *connect,
 		       struct cfg80211_cached_keys *connkeys,
 		       const u8 *prev_bssid);
 int cfg80211_connect(struct cfg80211_registered_device *rdev,
 		     struct net_device *dev,
 		     struct cfg80211_connect_params *connect,
 		     struct cfg80211_cached_keys *connkeys);
 int __cfg80211_disconnect(struct cfg80211_registered_device *rdev,
 			  struct net_device *dev, u16 reason,
 			  bool wextev);
 int cfg80211_disconnect(struct cfg80211_registered_device *rdev,
 			struct net_device *dev, u16 reason,
 			bool wextev);
 void __cfg80211_roamed(struct wireless_dev *wdev,
 		       struct cfg80211_bss *bss,
 		       const u8 *req_ie, size_t req_ie_len,
 		       const u8 *resp_ie, size_t resp_ie_len);
 int cfg80211_mgd_wext_connect(struct cfg80211_registered_device *rdev,
 			      struct wireless_dev *wdev);

 void cfg80211_conn_work(struct work_struct *work);
 void cfg80211_sme_failed_assoc(struct wireless_dev *wdev);
 bool cfg80211_sme_failed_reassoc(struct wireless_dev *wdev);

 /* internal helpers */
 bool cfg80211_supported_cipher_suite(struct wiphy *wiphy, u32 cipher);
 int cfg80211_validate_key_settings(struct cfg80211_registered_device *rdev,
 				   struct key_params *params, int key_idx,
 				   bool pairwise, const u8 *mac_addr);
 void __cfg80211_disconnected(struct net_device *dev, const u8 *ie,
 			     size_t ie_len, u16 reason, bool from_ap);
 void cfg80211_sme_scan_done(struct net_device *dev);
 void cfg80211_sme_rx_auth(struct net_device *dev, const u8 *buf, size_t len);
 void cfg80211_sme_disassoc(struct net_device *dev,
 			   struct cfg80211_internal_bss *bss);
 void __cfg80211_scan_done(struct work_struct *wk);
 void ___cfg80211_scan_done(struct cfg80211_registered_device *rdev, bool leak);
 void __cfg80211_sched_scan_results(struct work_struct *wk);
 int __cfg80211_stop_sched_scan(struct cfg80211_registered_device *rdev,
 			       bool driver_initiated);
 void cfg80211_upload_connect_keys(struct wireless_dev *wdev);
 int cfg80211_change_iface(struct cfg80211_registered_device *rdev,
 			  struct net_device *dev, enum nl80211_iftype ntype,
 			  u32 *flags, struct vif_params *params);
 void cfg80211_process_rdev_events(struct cfg80211_registered_device *rdev);
 void cfg80211_process_wdev_events(struct wireless_dev *wdev);

 int cfg80211_can_use_iftype_chan(struct cfg80211_registered_device *rdev,
 				 struct wireless_dev *wdev,
 				 enum nl80211_iftype iftype,
 				 struct ieee80211_channel *chan,
 				 enum cfg80211_chan_mode chanmode);

 static inline int
 cfg80211_can_change_interface(struct cfg80211_registered_device *rdev,
 			      struct wireless_dev *wdev,
 			      enum nl80211_iftype iftype)
 {
 	return cfg80211_can_use_iftype_chan(rdev, wdev, iftype, NULL,
 					    CHAN_MODE_UNDEFINED);
 }

 static inline int
 cfg80211_can_add_interface(struct cfg80211_registered_device *rdev,
 			   enum nl80211_iftype iftype)
 {
 	return cfg80211_can_change_interface(rdev, NULL, iftype);
 }

 static inline int
 cfg80211_can_use_chan(struct cfg80211_registered_device *rdev,
 		      struct wireless_dev *wdev,
 		      struct ieee80211_channel *chan,
 		      enum cfg80211_chan_mode chanmode)
 {
 	return cfg80211_can_use_iftype_chan(rdev, wdev, wdev->iftype,
 					    chan, chanmode);
 }

 void
 cfg80211_get_chan_state(struct wireless_dev *wdev,
 		        struct ieee80211_channel **chan,
 		        enum cfg80211_chan_mode *chanmode);

 int cfg80211_set_monitor_channel(struct cfg80211_registered_device *rdev,
 				 struct cfg80211_chan_def *chandef);

 int ieee80211_get_ratemask(struct ieee80211_supported_band *sband,
 			   const u8 *rates, unsigned int n_rates,
 			   u32 *mask);

 int cfg80211_validate_beacon_int(struct cfg80211_registered_device *rdev,
 				 u32 beacon_int);

 void cfg80211_update_iface_num(struct cfg80211_registered_device *rdev,
 			       enum nl80211_iftype iftype, int num);

 #define CFG80211_MAX_NUM_DIFFERENT_CHANNELS 10

 #ifdef CONFIG_CFG80211_DEVELOPER_WARNINGS
 #define CFG80211_DEV_WARN_ON(cond)	WARN_ON(cond)
 #else
 /*
  * Trick to enable using it as a condition,
  * and also not give a warning when it's
  * not used that way.
  */
 #define CFG80211_DEV_WARN_ON(cond)	({bool __r = (cond); __r; })
 #endif

 #endif /* __NET_WIRELESS_CORE_H */
	/*
	* Wireless configuration interface internals.
	*
	* Copyright 2006-2010 Johannes Berg <johannes@sipsolutions.net>
	*/
	#ifndef __NET_WIRELESS_CORE_H
	#define __NET_WIRELESS_CORE_H
	#include <linux/mutex.h>
	#include <linux/list.h>
	#include <linux/netdevice.h>
	#include <linux/kref.h>
	#include <linux/rbtree.h>
	#include <linux/debugfs.h>
	#include <linux/rfkill.h>
	#include <linux/workqueue.h>
	#include <linux/rtnetlink.h>
	#include <net/genetlink.h>
	#include <net/cfg80211.h>
	#include "reg.h"

	struct cfg80211_registered_device {
	const struct cfg80211_ops *ops;
	struct list_head list;
	/* we hold this mutex during any call so that
	* we cannot do multiple calls at once, and also
	* to avoid the deregister call to proceed while
	* any call is in progress */
	struct mutex mtx;

	/* rfkill support */
	struct rfkill_ops rfkill_ops;
	struct rfkill *rfkill;
	struct work_struct rfkill_sync;

	/* ISO / IEC 3166 alpha2 for which this device is receiving
	* country IEs on, this can help disregard country IEs from APs
	* on the same alpha2 quickly. The alpha2 may differ from
	* cfg80211_regdomain's alpha2 when an intersection has occurred.
	* If the AP is reconfigured this can also be used to tell us if
	* the country on the country IE changed. */
	char country_ie_alpha2[2];

	/* If a Country IE has been received this tells us the environment
	* which its telling us its in. This defaults to ENVIRON_ANY */
	enum environment_cap env;

	/* wiphy index, internal only */
	int wiphy_idx;

	/* associated wireless interfaces */
	struct mutex devlist_mtx;
	/* protected by devlist_mtx or RCU */
	struct list_head wdev_list;
	int devlist_generation, wdev_id;
	int opencount; /* also protected by devlist_mtx */
	wait_queue_head_t dev_wait;

	struct list_head beacon_registrations;
	spinlock_t beacon_registrations_lock;

	/* protected by RTNL only */
	int num_running_ifaces;
	int num_running_monitor_ifaces;

	/* BSSes/scanning */
	spinlock_t bss_lock;
	struct list_head bss_list;
	struct rb_root bss_tree;
	u32 bss_generation;
	struct cfg80211_scan_request scan_req; / protected by RTNL */
	struct cfg80211_sched_scan_request *sched_scan_req;
	unsigned long suspend_at;
	struct work_struct scan_done_wk;
	struct work_struct sched_scan_results_wk;

	struct mutex sched_scan_mtx;

	#ifdef CONFIG_NL80211_TESTMODE
	struct genl_info *testmode_info;
	#endif

	struct work_struct conn_work;
	struct work_struct event_work;

	struct cfg80211_wowlan *wowlan;

	/* must be last because of the way we do wiphy_priv(),
	* and it should at least be aligned to NETDEV_ALIGN */
	struct wiphy wiphy __attribute__((__aligned__(NETDEV_ALIGN)));
	};

	static inline
	struct cfg80211_registered_device wiphy_to_dev(struct wiphy wiphy)
	{
	BUG_ON(!wiphy);
	return container_of(wiphy, struct cfg80211_registered_device, wiphy);
	}

	/* Note 0 is valid, hence phy0 */
	static inline
	bool wiphy_idx_valid(int wiphy_idx)
	{
	return wiphy_idx >= 0;
	}

	static inline void
	cfg80211_rdev_free_wowlan(struct cfg80211_registered_device *rdev)
	{
	int i;

	if (!rdev->wowlan)
	return;
	for (i = 0; i < rdev->wowlan->n_patterns; i++)
	kfree(rdev->wowlan->patterns[i].mask);
	kfree(rdev->wowlan->patterns);
	kfree(rdev->wowlan);
	}

	extern struct workqueue_struct *cfg80211_wq;
	extern struct mutex cfg80211_mutex;
	extern struct list_head cfg80211_rdev_list;
	extern int cfg80211_rdev_list_generation;

	static inline void assert_cfg80211_lock(void)
	{
	lockdep_assert_held(&cfg80211_mutex);
	}

	/*
	* You can use this to mark a wiphy_idx as not having an associated wiphy.
	* It guarantees cfg80211_rdev_by_wiphy_idx(wiphy_idx) will return NULL
	*/
	#define WIPHY_IDX_STALE -1

	struct cfg80211_internal_bss {
	struct list_head list;
	struct rb_node rbn;
	unsigned long ts;
	struct kref ref;
	atomic_t hold;

	/* must be last because of priv member */
	struct cfg80211_bss pub;
	};

	static inline struct cfg80211_internal_bss bss_from_pub(struct cfg80211_bss pub)
	{
	return container_of(pub, struct cfg80211_internal_bss, pub);
	}

	static inline void cfg80211_hold_bss(struct cfg80211_internal_bss *bss)
	{
	atomic_inc(&bss->hold);
	}

	static inline void cfg80211_unhold_bss(struct cfg80211_internal_bss *bss)
	{
	int r = atomic_dec_return(&bss->hold);
	WARN_ON(r < 0);
	}


	struct cfg80211_registered_device *cfg80211_rdev_by_wiphy_idx(int wiphy_idx);
	int get_wiphy_idx(struct wiphy *wiphy);

	/* requires cfg80211_rdev_mutex to be held! */
	struct wiphy *wiphy_idx_to_wiphy(int wiphy_idx);

	/* identical to cfg80211_get_dev_from_info but only operate on ifindex */
	extern struct cfg80211_registered_device *
	cfg80211_get_dev_from_ifindex(struct net *net, int ifindex);

	int cfg80211_switch_netns(struct cfg80211_registered_device *rdev,
	struct net *net);

	static inline void cfg80211_lock_rdev(struct cfg80211_registered_device *rdev)
	{
	mutex_lock(&rdev->mtx);
	}

	static inline void cfg80211_unlock_rdev(struct cfg80211_registered_device *rdev)
	{
	BUG_ON(IS_ERR(rdev) \|\| !rdev);
	mutex_unlock(&rdev->mtx);
	}

	static inline void wdev_lock(struct wireless_dev *wdev)
	__acquires(wdev)
	{
	mutex_lock(&wdev->mtx);
	__acquire(wdev->mtx);
	}

	static inline void wdev_unlock(struct wireless_dev *wdev)
	__releases(wdev)
	{
	__release(wdev->mtx);
	mutex_unlock(&wdev->mtx);
	}

	#define ASSERT_RDEV_LOCK(rdev) lockdep_assert_held(&(rdev)->mtx)
	#define ASSERT_WDEV_LOCK(wdev) lockdep_assert_held(&(wdev)->mtx)

	static inline bool cfg80211_has_monitors_only(struct cfg80211_registered_device *rdev)
	{
	ASSERT_RTNL();

	return rdev->num_running_ifaces == rdev->num_running_monitor_ifaces &&
	rdev->num_running_ifaces > 0;
	}

	enum cfg80211_event_type {
	EVENT_CONNECT_RESULT,
	EVENT_ROAMED,
	EVENT_DISCONNECTED,
	EVENT_IBSS_JOINED,
	};

	struct cfg80211_event {
	struct list_head list;
	enum cfg80211_event_type type;

	union {
	struct {
	u8 bssid[ETH_ALEN];
	const u8 *req_ie;
	const u8 *resp_ie;
	size_t req_ie_len;
	size_t resp_ie_len;
	u16 status;
	} cr;
	struct {
	const u8 *req_ie;
	const u8 *resp_ie;
	size_t req_ie_len;
	size_t resp_ie_len;
	struct cfg80211_bss *bss;
	} rm;
	struct {
	const u8 *ie;
	size_t ie_len;
	u16 reason;
	} dc;
	struct {
	u8 bssid[ETH_ALEN];
	} ij;
	};
	};

	struct cfg80211_cached_keys {
	struct key_params params[6];
	u8 data[6][WLAN_MAX_KEY_LEN];
	int def, defmgmt;
	};

	enum cfg80211_chan_mode {
	CHAN_MODE_UNDEFINED,
	CHAN_MODE_SHARED,
	CHAN_MODE_EXCLUSIVE,
	};

	struct cfg80211_beacon_registration {
	struct list_head list;
	u32 nlportid;
	};

	/* free object */
	extern void cfg80211_dev_free(struct cfg80211_registered_device *rdev);

	extern int cfg80211_dev_rename(struct cfg80211_registered_device *rdev,
	char *newname);

	void ieee80211_set_bitrate_flags(struct wiphy *wiphy);

	void cfg80211_bss_expire(struct cfg80211_registered_device *dev);
	void cfg80211_bss_age(struct cfg80211_registered_device *dev,
	unsigned long age_secs);

	/* IBSS */
	int __cfg80211_join_ibss(struct cfg80211_registered_device *rdev,
	struct net_device *dev,
	struct cfg80211_ibss_params *params,
	struct cfg80211_cached_keys *connkeys);
	int cfg80211_join_ibss(struct cfg80211_registered_device *rdev,
	struct net_device *dev,
	struct cfg80211_ibss_params *params,
	struct cfg80211_cached_keys *connkeys);
	void cfg80211_clear_ibss(struct net_device *dev, bool nowext);
	int __cfg80211_leave_ibss(struct cfg80211_registered_device *rdev,
	struct net_device *dev, bool nowext);
	int cfg80211_leave_ibss(struct cfg80211_registered_device *rdev,
	struct net_device *dev, bool nowext);
	void __cfg80211_ibss_joined(struct net_device dev, const u8 bssid);
	int cfg80211_ibss_wext_join(struct cfg80211_registered_device *rdev,
	struct wireless_dev *wdev);

	/* mesh */
	extern const struct mesh_config default_mesh_config;
	extern const struct mesh_setup default_mesh_setup;
	int __cfg80211_join_mesh(struct cfg80211_registered_device *rdev,
	struct net_device *dev,
	struct mesh_setup *setup,
	const struct mesh_config *conf);
	int cfg80211_join_mesh(struct cfg80211_registered_device *rdev,
	struct net_device *dev,
	struct mesh_setup *setup,
	const struct mesh_config *conf);
	int cfg80211_leave_mesh(struct cfg80211_registered_device *rdev,
	struct net_device *dev);
	int cfg80211_set_mesh_channel(struct cfg80211_registered_device *rdev,
	struct wireless_dev *wdev,
	struct cfg80211_chan_def *chandef);

	/* AP */
	int cfg80211_stop_ap(struct cfg80211_registered_device *rdev,
	struct net_device *dev);

	/* MLME */
	int __cfg80211_mlme_auth(struct cfg80211_registered_device *rdev,
	struct net_device *dev,
	struct ieee80211_channel *chan,
	enum nl80211_auth_type auth_type,
	const u8 *bssid,
	const u8 *ssid, int ssid_len,
	const u8 *ie, int ie_len,
	const u8 *key, int key_len, int key_idx,
	const u8 *sae_data, int sae_data_len);
	int cfg80211_mlme_auth(struct cfg80211_registered_device *rdev,
	struct net_device dev, struct ieee80211_channel chan,
	enum nl80211_auth_type auth_type, const u8 *bssid,
	const u8 *ssid, int ssid_len,
	const u8 *ie, int ie_len,
	const u8 *key, int key_len, int key_idx,
	const u8 *sae_data, int sae_data_len);
	int __cfg80211_mlme_assoc(struct cfg80211_registered_device *rdev,
	struct net_device *dev,
	struct ieee80211_channel *chan,
	const u8 bssid, const u8 prev_bssid,
	const u8 *ssid, int ssid_len,
	const u8 *ie, int ie_len, bool use_mfp,
	struct cfg80211_crypto_settings *crypt,
	u32 assoc_flags, struct ieee80211_ht_cap *ht_capa,
	struct ieee80211_ht_cap *ht_capa_mask);
	int cfg80211_mlme_assoc(struct cfg80211_registered_device *rdev,
	struct net_device dev, struct ieee80211_channel chan,
	const u8 bssid, const u8 prev_bssid,
	const u8 *ssid, int ssid_len,
	const u8 *ie, int ie_len, bool use_mfp,
	struct cfg80211_crypto_settings *crypt,
	u32 assoc_flags, struct ieee80211_ht_cap *ht_capa,
	struct ieee80211_ht_cap *ht_capa_mask);
	int __cfg80211_mlme_deauth(struct cfg80211_registered_device *rdev,
	struct net_device dev, const u8 bssid,
	const u8 *ie, int ie_len, u16 reason,
	bool local_state_change);
	int cfg80211_mlme_deauth(struct cfg80211_registered_device *rdev,
	struct net_device dev, const u8 bssid,
	const u8 *ie, int ie_len, u16 reason,
	bool local_state_change);
	int cfg80211_mlme_disassoc(struct cfg80211_registered_device *rdev,
	struct net_device dev, const u8 bssid,
	const u8 *ie, int ie_len, u16 reason,
	bool local_state_change);
	void cfg80211_mlme_down(struct cfg80211_registered_device *rdev,
	struct net_device *dev);
	void __cfg80211_connect_result(struct net_device dev, const u8 bssid,
	const u8 *req_ie, size_t req_ie_len,
	const u8 *resp_ie, size_t resp_ie_len,
	u16 status, bool wextev,
	struct cfg80211_bss *bss);
	int cfg80211_mlme_register_mgmt(struct wireless_dev *wdev, u32 snd_pid,
	u16 frame_type, const u8 *match_data,
	int match_len);
	void cfg80211_mlme_unregister_socket(struct wireless_dev *wdev, u32 nlpid);
	void cfg80211_mlme_purge_registrations(struct wireless_dev *wdev);
	int cfg80211_mlme_mgmt_tx(struct cfg80211_registered_device *rdev,
	struct wireless_dev *wdev,
	struct ieee80211_channel *chan, bool offchan,
	unsigned int wait, const u8 *buf, size_t len,
	bool no_cck, bool dont_wait_for_ack, u64 *cookie);
	void cfg80211_oper_and_ht_capa(struct ieee80211_ht_cap *ht_capa,
	const struct ieee80211_ht_cap *ht_capa_mask);

	/* SME */
	int __cfg80211_connect(struct cfg80211_registered_device *rdev,
	struct net_device *dev,
	struct cfg80211_connect_params *connect,
	struct cfg80211_cached_keys *connkeys,
	const u8 *prev_bssid);
	int cfg80211_connect(struct cfg80211_registered_device *rdev,
	struct net_device *dev,
	struct cfg80211_connect_params *connect,
	struct cfg80211_cached_keys *connkeys);
	int __cfg80211_disconnect(struct cfg80211_registered_device *rdev,
	struct net_device *dev, u16 reason,
	bool wextev);
	int cfg80211_disconnect(struct cfg80211_registered_device *rdev,
	struct net_device *dev, u16 reason,
	bool wextev);
	void __cfg80211_roamed(struct wireless_dev *wdev,
	struct cfg80211_bss *bss,
	const u8 *req_ie, size_t req_ie_len,
	const u8 *resp_ie, size_t resp_ie_len);
	int cfg80211_mgd_wext_connect(struct cfg80211_registered_device *rdev,
	struct wireless_dev *wdev);

	void cfg80211_conn_work(struct work_struct *work);
	void cfg80211_sme_failed_assoc(struct wireless_dev *wdev);
	bool cfg80211_sme_failed_reassoc(struct wireless_dev *wdev);

	/* internal helpers */
	bool cfg80211_supported_cipher_suite(struct wiphy *wiphy, u32 cipher);
	int cfg80211_validate_key_settings(struct cfg80211_registered_device *rdev,
	struct key_params *params, int key_idx,
	bool pairwise, const u8 *mac_addr);
	void __cfg80211_disconnected(struct net_device dev, const u8 ie,
	size_t ie_len, u16 reason, bool from_ap);
	void cfg80211_sme_scan_done(struct net_device *dev);
	void cfg80211_sme_rx_auth(struct net_device dev, const u8 buf, size_t len);
	void cfg80211_sme_disassoc(struct net_device *dev,
	struct cfg80211_internal_bss *bss);
	void __cfg80211_scan_done(struct work_struct *wk);
	void ___cfg80211_scan_done(struct cfg80211_registered_device *rdev, bool leak);
	void __cfg80211_sched_scan_results(struct work_struct *wk);
	int __cfg80211_stop_sched_scan(struct cfg80211_registered_device *rdev,
	bool driver_initiated);
	void cfg80211_upload_connect_keys(struct wireless_dev *wdev);
	int cfg80211_change_iface(struct cfg80211_registered_device *rdev,
	struct net_device *dev, enum nl80211_iftype ntype,
	u32 flags, struct vif_params params);
	void cfg80211_process_rdev_events(struct cfg80211_registered_device *rdev);
	void cfg80211_process_wdev_events(struct wireless_dev *wdev);

	int cfg80211_can_use_iftype_chan(struct cfg80211_registered_device *rdev,
	struct wireless_dev *wdev,
	enum nl80211_iftype iftype,
	struct ieee80211_channel *chan,
	enum cfg80211_chan_mode chanmode);

	static inline int
	cfg80211_can_change_interface(struct cfg80211_registered_device *rdev,
	struct wireless_dev *wdev,
	enum nl80211_iftype iftype)
	{
	return cfg80211_can_use_iftype_chan(rdev, wdev, iftype, NULL,
	CHAN_MODE_UNDEFINED);
	}

	static inline int
	cfg80211_can_add_interface(struct cfg80211_registered_device *rdev,
	enum nl80211_iftype iftype)
	{
	return cfg80211_can_change_interface(rdev, NULL, iftype);
	}

	static inline int
	cfg80211_can_use_chan(struct cfg80211_registered_device *rdev,
	struct wireless_dev *wdev,
	struct ieee80211_channel *chan,
	enum cfg80211_chan_mode chanmode)
	{
	return cfg80211_can_use_iftype_chan(rdev, wdev, wdev->iftype,
	chan, chanmode);
	}

	void
	cfg80211_get_chan_state(struct wireless_dev *wdev,
	struct ieee80211_channel **chan,
	enum cfg80211_chan_mode *chanmode);

	int cfg80211_set_monitor_channel(struct cfg80211_registered_device *rdev,
	struct cfg80211_chan_def *chandef);

	int ieee80211_get_ratemask(struct ieee80211_supported_band *sband,
	const u8 *rates, unsigned int n_rates,
	u32 *mask);

	int cfg80211_validate_beacon_int(struct cfg80211_registered_device *rdev,
	u32 beacon_int);

	void cfg80211_update_iface_num(struct cfg80211_registered_device *rdev,
	enum nl80211_iftype iftype, int num);

	#define CFG80211_MAX_NUM_DIFFERENT_CHANNELS 10

	#ifdef CONFIG_CFG80211_DEVELOPER_WARNINGS
	#define CFG80211_DEV_WARN_ON(cond) WARN_ON(cond)
	#else
	/*
	* Trick to enable using it as a condition,
	* and also not give a warning when it's
	* not used that way.
	*/
	#define CFG80211_DEV_WARN_ON(cond) ({bool __r = (cond); __r; })
	#endif

	#endif /* __NET_WIRELESS_CORE_H */