blob: 0a592e4295f0cbdca4a2ffbabc96dd01b4da619a [file] [log] [blame]
* Wireless configuration interface internals.
* Copyright 2006, 2007 Johannes Berg <>
#include <linux/mutex.h>
#include <linux/list.h>
#include <linux/netdevice.h>
#include <linux/kref.h>
#include <linux/rbtree.h>
#include <linux/mutex.h>
#include <net/genetlink.h>
#include <net/wireless.h>
#include <net/cfg80211.h>
#include "reg.h"
struct cfg80211_registered_device {
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;
/* 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;
/* associate netdev list */
struct mutex devlist_mtx;
struct list_head netdev_list;
/* 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 */
unsigned long suspend_at;
/* 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)
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);
extern struct mutex cfg80211_mutex;
extern struct list_head cfg80211_drv_list;
static inline void assert_cfg80211_lock(void)
* You can use this to mark a wiphy_idx as not having an associated wiphy.
* It guarantees cfg80211_drv_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;
bool hold, ies_allocated;
/* must be last because of priv member */
struct cfg80211_bss pub;
struct cfg80211_registered_device *cfg80211_drv_by_wiphy_idx(int wiphy_idx);
int get_wiphy_idx(struct wiphy *wiphy);
struct cfg80211_registered_device *
__cfg80211_drv_from_info(struct genl_info *info);
* This function returns a pointer to the driver
* that the genl_info item that is passed refers to.
* If successful, it returns non-NULL and also locks
* the driver's mutex!
* This means that you need to call cfg80211_put_dev()
* before being allowed to acquire &cfg80211_mutex!
* This is necessary because we need to lock the global
* mutex to get an item off the list safely, and then
* we lock the drv mutex so it doesn't go away under us.
* We don't want to keep cfg80211_mutex locked
* for all the time in order to allow requests on
* other interfaces to go through at the same time.
* The result of this can be a PTR_ERR and hence must
* be checked with IS_ERR() for errors.
extern struct cfg80211_registered_device *
cfg80211_get_dev_from_info(struct genl_info *info);
/* requires cfg80211_drv_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(int ifindex);
extern void cfg80211_put_dev(struct cfg80211_registered_device *drv);
/* free object */
extern void cfg80211_dev_free(struct cfg80211_registered_device *drv);
extern int cfg80211_dev_rename(struct cfg80211_registered_device *drv,
char *newname);
void ieee80211_set_bitrate_flags(struct wiphy *wiphy);
void wiphy_update_regulatory(struct wiphy *wiphy,
enum nl80211_reg_initiator setby);
void cfg80211_bss_expire(struct cfg80211_registered_device *dev);
void cfg80211_bss_age(struct cfg80211_registered_device *dev,
unsigned long age_secs);
#endif /* __NET_WIRELESS_CORE_H */