cfg80211: keep track of BSSes

In order to avoid problems with BSS structs going away
while they're in use, I've long wanted to make cfg80211
keep track of them. Without the SME, that wasn't doable
but now that we have the SME we can do this too. It can
keep track of up to four separate authentications and
one association, regardless of whether it's controlled
by the cfg80211 SME or the userspace SME.

Signed-off-by: Johannes Berg <johannes@sipsolutions.net>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

1 files changed, 40 insertions, 1 deletions

diff --git a/net/wireless/core.h b/net/wireless/core.h
index 5209acb0ff7e..82918f5896a5 100644
--- a/net/wireless/core.h
+++ b/net/wireless/core.h
@@ -110,12 +110,30 @@ struct cfg80211_internal_bss {
         struct rb_node rbn;
         unsigned long ts;
         struct kref ref;
-        bool hold, ies_allocated;
+        atomic_t hold;
+        bool ies_allocated;
 
         /* 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_drv_by_wiphy_idx(int wiphy_idx);
 int get_wiphy_idx(struct wiphy *wiphy);
 
@@ -176,6 +194,26 @@ 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);
 
+/* 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);
+int cfg80211_mlme_assoc(struct cfg80211_registered_device *rdev,
+                        struct net_device *dev, struct ieee80211_channel *chan,
+                        const u8 *bssid, const u8 *ssid, int ssid_len,
+                        const u8 *ie, int ie_len, bool use_mfp,
+                        struct cfg80211_crypto_settings *crypt);
+int cfg80211_mlme_deauth(struct cfg80211_registered_device *rdev,
+                         struct net_device *dev, const u8 *bssid,
+                         const u8 *ie, int ie_len, u16 reason);
+int cfg80211_mlme_disassoc(struct cfg80211_registered_device *rdev,
+                           struct net_device *dev, const u8 *bssid,
+                           const u8 *ie, int ie_len, u16 reason);
+void cfg80211_mlme_down(struct cfg80211_registered_device *rdev,
+                        struct net_device *dev);
+
 /* SME */
 int cfg80211_connect(struct cfg80211_registered_device *rdev,
                      struct net_device *dev,
@@ -193,5 +231,6 @@ void __cfg80211_disconnected(struct net_device *dev, gfp_t gfp, 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, int idx);
 
 #endif /* __NET_WIRELESS_CORE_H */