forked from Minki/linux
0bfbce18b9
"cfg80211: add assert_cfg80211_lock() to ensure proper protection" added assert_cfg80211_lock() calls into various places. At least one of them, nl80211_send_wiphy(), should not have been there. That triggers the BUG_ON in assert_cfg80211_lock() and pretty much kills the kernel whenever someone runs hostapd.. Remove that call and make assert_cfg80211_lock() use WARN_ON instead of BUG_ON to be a bit more friendly to users. Signed-off-by: Jouni Malinen <jouni.malinen@atheros.com> Acked-by: Johannes Berg <johannes@sipsolutions.net> Signed-off-by: John W. Linville <linville@tuxdriver.com>
146 lines
4.3 KiB
C
146 lines
4.3 KiB
C
/*
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* Wireless configuration interface internals.
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*
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* Copyright 2006, 2007 Johannes Berg <johannes@sipsolutions.net>
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*/
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#ifndef __NET_WIRELESS_CORE_H
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#define __NET_WIRELESS_CORE_H
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#include <linux/mutex.h>
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#include <linux/list.h>
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#include <linux/netdevice.h>
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#include <linux/kref.h>
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#include <linux/rbtree.h>
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#include <linux/mutex.h>
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#include <net/genetlink.h>
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#include <net/wireless.h>
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#include <net/cfg80211.h>
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#include "reg.h"
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struct cfg80211_registered_device {
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struct cfg80211_ops *ops;
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struct list_head list;
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/* we hold this mutex during any call so that
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* we cannot do multiple calls at once, and also
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* to avoid the deregister call to proceed while
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* any call is in progress */
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struct mutex mtx;
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/* ISO / IEC 3166 alpha2 for which this device is receiving
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* country IEs on, this can help disregard country IEs from APs
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* on the same alpha2 quickly. The alpha2 may differ from
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* cfg80211_regdomain's alpha2 when an intersection has occurred.
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* If the AP is reconfigured this can also be used to tell us if
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* the country on the country IE changed. */
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char country_ie_alpha2[2];
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/* If a Country IE has been received this tells us the environment
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* which its telling us its in. This defaults to ENVIRON_ANY */
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enum environment_cap env;
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/* wiphy index, internal only */
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int wiphy_idx;
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/* associate netdev list */
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struct mutex devlist_mtx;
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struct list_head netdev_list;
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/* BSSes/scanning */
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spinlock_t bss_lock;
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struct list_head bss_list;
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struct rb_root bss_tree;
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u32 bss_generation;
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struct cfg80211_scan_request *scan_req; /* protected by RTNL */
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unsigned long suspend_at;
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/* must be last because of the way we do wiphy_priv(),
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* and it should at least be aligned to NETDEV_ALIGN */
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struct wiphy wiphy __attribute__((__aligned__(NETDEV_ALIGN)));
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};
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static inline
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struct cfg80211_registered_device *wiphy_to_dev(struct wiphy *wiphy)
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{
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BUG_ON(!wiphy);
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return container_of(wiphy, struct cfg80211_registered_device, wiphy);
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}
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/* Note 0 is valid, hence phy0 */
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static inline
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bool wiphy_idx_valid(int wiphy_idx)
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{
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return (wiphy_idx >= 0);
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}
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extern struct mutex cfg80211_mutex;
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extern struct list_head cfg80211_drv_list;
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static inline void assert_cfg80211_lock(void)
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{
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WARN_ON(!mutex_is_locked(&cfg80211_mutex));
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}
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/*
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* You can use this to mark a wiphy_idx as not having an associated wiphy.
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* It guarantees cfg80211_drv_by_wiphy_idx(wiphy_idx) will return NULL
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*/
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#define WIPHY_IDX_STALE -1
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struct cfg80211_internal_bss {
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struct list_head list;
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struct rb_node rbn;
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unsigned long ts;
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struct kref ref;
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/* must be last because of priv member */
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struct cfg80211_bss pub;
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};
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struct cfg80211_registered_device *cfg80211_drv_by_wiphy_idx(int wiphy_idx);
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int get_wiphy_idx(struct wiphy *wiphy);
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/*
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* This function returns a pointer to the driver
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* that the genl_info item that is passed refers to.
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* If successful, it returns non-NULL and also locks
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* the driver's mutex!
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*
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* This means that you need to call cfg80211_put_dev()
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* before being allowed to acquire &cfg80211_mutex!
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*
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* This is necessary because we need to lock the global
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* mutex to get an item off the list safely, and then
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* we lock the drv mutex so it doesn't go away under us.
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*
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* We don't want to keep cfg80211_mutex locked
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* for all the time in order to allow requests on
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* other interfaces to go through at the same time.
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*
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* The result of this can be a PTR_ERR and hence must
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* be checked with IS_ERR() for errors.
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*/
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extern struct cfg80211_registered_device *
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cfg80211_get_dev_from_info(struct genl_info *info);
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/* requires cfg80211_drv_mutex to be held! */
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struct wiphy *wiphy_idx_to_wiphy(int wiphy_idx);
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/* identical to cfg80211_get_dev_from_info but only operate on ifindex */
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extern struct cfg80211_registered_device *
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cfg80211_get_dev_from_ifindex(int ifindex);
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extern void cfg80211_put_dev(struct cfg80211_registered_device *drv);
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/* free object */
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extern void cfg80211_dev_free(struct cfg80211_registered_device *drv);
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extern int cfg80211_dev_rename(struct cfg80211_registered_device *drv,
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char *newname);
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void ieee80211_set_bitrate_flags(struct wiphy *wiphy);
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void wiphy_update_regulatory(struct wiphy *wiphy, enum reg_set_by setby);
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void cfg80211_bss_expire(struct cfg80211_registered_device *dev);
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void cfg80211_bss_age(struct cfg80211_registered_device *dev,
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unsigned long age_secs);
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#endif /* __NET_WIRELESS_CORE_H */
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