mac80211: use cfg80211s BSS infrastructure

Remove all the code from mac80211 to keep track of BSSes
and use the cfg80211-provided code completely.

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

7 files changed, 114 insertions, 418 deletions

diff --git a/net/mac80211/ieee80211_i.h b/net/mac80211/ieee80211_i.h
index 87d63fe61bf9..678278344d79 100644
--- a/net/mac80211/ieee80211_i.h
+++ b/net/mac80211/ieee80211_i.h
@@ -72,43 +72,36 @@ struct ieee80211_fragment_entry {
 
 
 struct ieee80211_bss {
-        struct list_head list;
-        struct ieee80211_bss *hnext;
-        size_t ssid_len;
+        /* Yes, this is a hack */
+        struct cfg80211_bss cbss;
 
-        atomic_t users;
-
-        u8 bssid[ETH_ALEN];
+        /* don't want to look up all the time */
+        size_t ssid_len;
         u8 ssid[IEEE80211_MAX_SSID_LEN];
+
         u8 dtim_period;
-        u16 capability; /* host byte order */
-        enum ieee80211_band band;
-        int freq;
-        int signal, noise, qual;
-        u8 *ies; /* all information elements from the last Beacon or Probe
-                  * Response frames; note Beacon frame is not allowed to
-                  * override values from Probe Response */
-        size_t ies_len;
+
         bool wmm_used;
+
+        unsigned long last_probe_resp;
+
 #ifdef CONFIG_MAC80211_MESH
         u8 *mesh_id;
         size_t mesh_id_len;
         u8 *mesh_cfg;
 #endif
+
 #define IEEE80211_MAX_SUPP_RATES 32
         u8 supp_rates[IEEE80211_MAX_SUPP_RATES];
         size_t supp_rates_len;
-        u64 timestamp;
-        int beacon_int;
 
-        unsigned long last_probe_resp;
-        unsigned long last_update;
-
-        /* during assocation, we save an ERP value from a probe response so
+        /*
+         * During assocation, we save an ERP value from a probe response so
          * that we can feed ERP info to the driver when handling the
          * association completes. these fields probably won't be up-to-date
-         * otherwise, you probably don't want to use them. */
-        int has_erp_value;
+         * otherwise, you probably don't want to use them.
+         */
+        bool has_erp_value;
         u8 erp_value;
 };
 
@@ -668,9 +661,6 @@ struct ieee80211_local {
         struct ieee80211_sub_if_data *scan_sdata;
         enum nl80211_channel_type oper_channel_type;
         struct ieee80211_channel *oper_channel, *csa_channel;
-        struct list_head bss_list;
-        struct ieee80211_bss *bss_hash[STA_HASH_SIZE];
-        spinlock_t bss_lock;
 
         /* SNMP counters */
         /* dot11CountersTable */
@@ -936,8 +926,6 @@ ieee80211_rx_result
 ieee80211_scan_rx(struct ieee80211_sub_if_data *sdata,
                   struct sk_buff *skb,
                   struct ieee80211_rx_status *rx_status);
-void ieee80211_rx_bss_list_init(struct ieee80211_local *local);
-void ieee80211_rx_bss_list_deinit(struct ieee80211_local *local);
 int ieee80211_sta_set_extra_ie(struct ieee80211_sub_if_data *sdata,
                                char *ie, size_t len);
 
diff --git a/net/mac80211/main.c b/net/mac80211/main.c
index 954edfbb6b6f..b4973a1b6595 100644
--- a/net/mac80211/main.c
+++ b/net/mac80211/main.c
@@ -734,6 +734,9 @@ struct ieee80211_hw *ieee80211_alloc_hw(size_t priv_data_len,
 
         wiphy->privid = mac80211_wiphy_privid;
         wiphy->max_scan_ssids = 4;
+        /* Yes, putting cfg80211_bss into ieee80211_bss is a hack */
+        wiphy->bss_priv_size = sizeof(struct ieee80211_bss) -
+                               sizeof(struct cfg80211_bss);
 
         local = wiphy_priv(wiphy);
         local->hw.wiphy = wiphy;
@@ -877,8 +880,6 @@ int ieee80211_register_hw(struct ieee80211_hw *hw)
         mpriv->local = local;
         local->mdev = mdev;
 
-        ieee80211_rx_bss_list_init(local);
-
         local->hw.workqueue =
                 create_singlethread_workqueue(wiphy_name(local->hw.wiphy));
         if (!local->hw.workqueue) {
@@ -1018,7 +1019,6 @@ void ieee80211_unregister_hw(struct ieee80211_hw *hw)
 
         rtnl_unlock();
 
-        ieee80211_rx_bss_list_deinit(local);
         ieee80211_clear_tx_pending(local);
         sta_info_stop(local);
         rate_control_deinitialize(local);
diff --git a/net/mac80211/mesh.c b/net/mac80211/mesh.c
index 8a1fcaeee4f2..9a3e5de0410a 100644
--- a/net/mac80211/mesh.c
+++ b/net/mac80211/mesh.c
@@ -275,16 +275,6 @@ u32 mesh_table_hash(u8 *addr, struct ieee80211_sub_if_data *sdata, struct mesh_t
                 & tbl->hash_mask;
 }
 
-u8 mesh_id_hash(u8 *mesh_id, int mesh_id_len)
-{
-        if (!mesh_id_len)
-                return 1;
-        else if (mesh_id_len == 1)
-                return (u8) mesh_id[0];
-        else
-                return (u8) (mesh_id[0] + 2 * mesh_id[1]);
-}
-
 struct mesh_table *mesh_table_alloc(int size_order)
 {
         int i;
diff --git a/net/mac80211/mesh.h b/net/mac80211/mesh.h
index 9e064ee98ee0..d891d7ddccd7 100644
--- a/net/mac80211/mesh.h
+++ b/net/mac80211/mesh.h
@@ -196,7 +196,6 @@ struct mesh_rmc {
 
 /* Public interfaces */
 /* Various */
-u8 mesh_id_hash(u8 *mesh_id, int mesh_id_len);
 int ieee80211_get_mesh_hdrlen(struct ieee80211s_hdr *meshhdr);
 int ieee80211_new_mesh_header(struct ieee80211s_hdr *meshhdr,
                 struct ieee80211_sub_if_data *sdata);
diff --git a/net/mac80211/mlme.c b/net/mac80211/mlme.c
index c5991ec047be..c51860f66731 100644
--- a/net/mac80211/mlme.c
+++ b/net/mac80211/mlme.c
@@ -55,10 +55,10 @@ static u8 *ieee80211_bss_get_ie(struct ieee80211_bss *bss, u8 ie)
 {
         u8 *end, *pos;
 
-        pos = bss->ies;
+        pos = bss->cbss.information_elements;
         if (pos == NULL)
                 return NULL;
-        end = pos + bss->ies_len;
+        end = pos + bss->cbss.len_information_elements;
 
         while (pos + 1 < end) {
                 if (pos + 2 + pos[1] > end)
@@ -289,7 +289,7 @@ static void ieee80211_send_assoc(struct ieee80211_sub_if_data *sdata,
                                    local->hw.conf.channel->center_freq,
                                    ifsta->ssid, ifsta->ssid_len);
         if (bss) {
-                if (bss->capability & WLAN_CAPABILITY_PRIVACY)
+                if (bss->cbss.capability & WLAN_CAPABILITY_PRIVACY)
                         capab |= WLAN_CAPABILITY_PRIVACY;
                 if (bss->wmm_used)
                         wmm = 1;
@@ -300,7 +300,7 @@ static void ieee80211_send_assoc(struct ieee80211_sub_if_data *sdata,
                  * b-only mode) */
                 rates_len = ieee80211_compatible_rates(bss, sband, &rates);
 
-                if ((bss->capability & WLAN_CAPABILITY_SPECTRUM_MGMT) &&
+                if ((bss->cbss.capability & WLAN_CAPABILITY_SPECTRUM_MGMT) &&
                     (local->hw.flags & IEEE80211_HW_SPECTRUM_MGMT))
                         capab |= WLAN_CAPABILITY_SPECTRUM_MGMT;
 
@@ -816,12 +816,12 @@ static void ieee80211_set_associated(struct ieee80211_sub_if_data *sdata,
                                    ifsta->ssid, ifsta->ssid_len);
         if (bss) {
                 /* set timing information */
-                sdata->vif.bss_conf.beacon_int = bss->beacon_int;
-                sdata->vif.bss_conf.timestamp = bss->timestamp;
+                sdata->vif.bss_conf.beacon_int = bss->cbss.beacon_interval;
+                sdata->vif.bss_conf.timestamp = bss->cbss.tsf;
                 sdata->vif.bss_conf.dtim_period = bss->dtim_period;
 
                 bss_info_changed |= ieee80211_handle_bss_capability(sdata,
-                        bss->capability, bss->has_erp_value, bss->erp_value);
+                        bss->cbss.capability, bss->has_erp_value, bss->erp_value);
 
                 ieee80211_rx_bss_put(local, bss);
         }
@@ -1041,7 +1041,7 @@ static int ieee80211_privacy_mismatch(struct ieee80211_sub_if_data *sdata,
         if (!bss)
                 return 0;
 
-        bss_privacy = !!(bss->capability & WLAN_CAPABILITY_PRIVACY);
+        bss_privacy = !!(bss->cbss.capability & WLAN_CAPABILITY_PRIVACY);
         wep_privacy = !!ieee80211_sta_wep_configured(sdata);
         privacy_invoked = !!(ifsta->flags & IEEE80211_STA_PRIVACY_INVOKED);
 
@@ -1416,8 +1416,6 @@ static void ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata,
         /* Add STA entry for the AP */
         sta = sta_info_get(local, ifsta->bssid);
         if (!sta) {
-                struct ieee80211_bss *bss;
-
                 newsta = true;
 
                 sta = sta_info_alloc(sdata, ifsta->bssid, GFP_ATOMIC);
@@ -1427,15 +1425,6 @@ static void ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata,
                         rcu_read_unlock();
                         return;
                 }
-                bss = ieee80211_rx_bss_get(local, ifsta->bssid,
-                                           local->hw.conf.channel->center_freq,
-                                           ifsta->ssid, ifsta->ssid_len);
-                if (bss) {
-                        sta->last_signal = bss->signal;
-                        sta->last_qual = bss->qual;
-                        sta->last_noise = bss->noise;
-                        ieee80211_rx_bss_put(local, bss);
-                }
 
                 /* update new sta with its last rx activity */
                 sta->last_rx = jiffies;
@@ -1691,10 +1680,11 @@ static int ieee80211_sta_join_ibss(struct ieee80211_sub_if_data *sdata,
                                    struct ieee80211_bss *bss)
 {
         return __ieee80211_sta_join_ibss(sdata, ifsta,
-                                         bss->bssid, bss->beacon_int,
-                                         bss->freq,
+                                         bss->cbss.bssid,
+                                         bss->cbss.beacon_interval,
+                                         bss->cbss.channel->center_freq,
                                          bss->supp_rates_len, bss->supp_rates,
-                                         bss->capability);
+                                         bss->cbss.capability);
 }
 
 static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata,
@@ -1769,7 +1759,7 @@ static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata,
         }
 
         /* was just updated in ieee80211_bss_info_update */
-        beacon_timestamp = bss->timestamp;
+        beacon_timestamp = bss->cbss.tsf;
 
         /*
          * In STA mode, the remaining parameters should not be overridden
@@ -1784,8 +1774,8 @@ static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata,
         /* check if we need to merge IBSS */
         if (sdata->vif.type == NL80211_IFTYPE_ADHOC && beacon &&
             (!(sdata->u.sta.flags & IEEE80211_STA_BSSID_SET)) &&
-            bss->capability & WLAN_CAPABILITY_IBSS &&
-            bss->freq == local->oper_channel->center_freq &&
+            bss->cbss.capability & WLAN_CAPABILITY_IBSS &&
+            bss->cbss.channel == local->oper_channel &&
             elems->ssid_len == sdata->u.sta.ssid_len &&
             memcmp(elems->ssid, sdata->u.sta.ssid,
                                 sdata->u.sta.ssid_len) == 0) {
@@ -2230,37 +2220,6 @@ static void ieee80211_sta_reset_auth(struct ieee80211_sub_if_data *sdata,
         netif_carrier_off(sdata->dev);
 }
 
-
-static int ieee80211_sta_match_ssid(struct ieee80211_if_sta *ifsta,
-                                    const char *ssid, int ssid_len)
-{
-        int tmp, hidden_ssid;
-
-        if (ssid_len == ifsta->ssid_len &&
-            !memcmp(ifsta->ssid, ssid, ssid_len))
-                return 1;
-
-        if (ifsta->flags & IEEE80211_STA_AUTO_BSSID_SEL)
-                return 0;
-
-        hidden_ssid = 1;
-        tmp = ssid_len;
-        while (tmp--) {
-                if (ssid[tmp] != '\0') {
-                        hidden_ssid = 0;
-                        break;
-                }
-        }
-
-        if (hidden_ssid && (ifsta->ssid_len == ssid_len || ssid_len == 0))
-                return 1;
-
-        if (ssid_len == 1 && ssid[0] == ' ')
-                return 1;
-
-        return 0;
-}
-
 static int ieee80211_sta_create_ibss(struct ieee80211_sub_if_data *sdata,
                                      struct ieee80211_if_sta *ifsta)
 {
@@ -2319,8 +2278,6 @@ static int ieee80211_sta_find_ibss(struct ieee80211_sub_if_data *sdata,
 {
         struct ieee80211_local *local = sdata->local;
         struct ieee80211_bss *bss;
-        int found = 0;
-        u8 bssid[ETH_ALEN];
         int active_ibss;
 
         if (ifsta->ssid_len == 0)
@@ -2331,56 +2288,39 @@ static int ieee80211_sta_find_ibss(struct ieee80211_sub_if_data *sdata,
         printk(KERN_DEBUG "%s: sta_find_ibss (active_ibss=%d)\n",
                sdata->dev->name, active_ibss);
 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
-        spin_lock_bh(&local->bss_lock);
-        list_for_each_entry(bss, &local->bss_list, list) {
-                if (ifsta->ssid_len != bss->ssid_len ||
-                    memcmp(ifsta->ssid, bss->ssid, bss->ssid_len) != 0
-                    || !(bss->capability & WLAN_CAPABILITY_IBSS))
-                        continue;
-                if ((ifsta->flags & IEEE80211_STA_BSSID_SET) &&
-                    memcmp(ifsta->bssid, bss->bssid, ETH_ALEN) != 0)
-                        continue;
-#ifdef CONFIG_MAC80211_IBSS_DEBUG
-                printk(KERN_DEBUG "   bssid=%pM found\n", bss->bssid);
-#endif /* CONFIG_MAC80211_IBSS_DEBUG */
-                memcpy(bssid, bss->bssid, ETH_ALEN);
-                found = 1;
-                if (active_ibss || memcmp(bssid, ifsta->bssid, ETH_ALEN) != 0)
-                        break;
-        }
-        spin_unlock_bh(&local->bss_lock);
+
+        if (active_ibss)
+                return 0;
+
+        if (ifsta->flags & IEEE80211_STA_BSSID_SET)
+                bss = ieee80211_rx_bss_get(local, ifsta->bssid, 0,
+                                           ifsta->ssid, ifsta->ssid_len);
+        else
+                bss = (void *)cfg80211_get_ibss(local->hw.wiphy,
+                                                NULL,
+                                                ifsta->ssid, ifsta->ssid_len);
 
 #ifdef CONFIG_MAC80211_IBSS_DEBUG
-        if (found)
+        if (bss)
                 printk(KERN_DEBUG "   sta_find_ibss: selected %pM current "
-                       "%pM\n", bssid, ifsta->bssid);
+                       "%pM\n", bss->cbss.bssid, ifsta->bssid);
 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
 
-        if (found &&
-            ((!(ifsta->flags & IEEE80211_STA_PREV_BSSID_SET)) ||
-             memcmp(ifsta->bssid, bssid, ETH_ALEN) != 0)) {
+        if (bss &&
+            (!(ifsta->flags & IEEE80211_STA_PREV_BSSID_SET) ||
+             memcmp(ifsta->bssid, bss->cbss.bssid, ETH_ALEN))) {
                 int ret;
-                int search_freq;
-
-                if (ifsta->flags & IEEE80211_STA_AUTO_CHANNEL_SEL)
-                        search_freq = bss->freq;
-                else
-                        search_freq = local->hw.conf.channel->center_freq;
-
-                bss = ieee80211_rx_bss_get(local, bssid, search_freq,
-                                           ifsta->ssid, ifsta->ssid_len);
-                if (!bss)
-                        goto dont_join;
 
                 printk(KERN_DEBUG "%s: Selected IBSS BSSID %pM"
                        " based on configured SSID\n",
-                       sdata->dev->name, bssid);
+                       sdata->dev->name, bss->cbss.bssid);
+
                 ret = ieee80211_sta_join_ibss(sdata, ifsta, bss);
                 ieee80211_rx_bss_put(local, bss);
                 return ret;
-        }
+        } else if (bss)
+                ieee80211_rx_bss_put(local, bss);
 
-dont_join:
 #ifdef CONFIG_MAC80211_IBSS_DEBUG
         printk(KERN_DEBUG "   did not try to join ibss\n");
 #endif /* CONFIG_MAC80211_IBSS_DEBUG */
@@ -2436,51 +2376,44 @@ static int ieee80211_sta_config_auth(struct ieee80211_sub_if_data *sdata,
                                      struct ieee80211_if_sta *ifsta)
 {
         struct ieee80211_local *local = sdata->local;
-        struct ieee80211_bss *bss, *selected = NULL;
-        int top_rssi = 0, freq;
-
-        spin_lock_bh(&local->bss_lock);
-        freq = local->oper_channel->center_freq;
-        list_for_each_entry(bss, &local->bss_list, list) {
-                if (!(bss->capability & WLAN_CAPABILITY_ESS))
-                        continue;
-
-                if ((ifsta->flags & (IEEE80211_STA_AUTO_SSID_SEL |
-                        IEEE80211_STA_AUTO_BSSID_SEL |
-                        IEEE80211_STA_AUTO_CHANNEL_SEL)) &&
-                    (!!(bss->capability & WLAN_CAPABILITY_PRIVACY) ^
-                     !!sdata->default_key))
-                        continue;
-
-                if (!(ifsta->flags & IEEE80211_STA_AUTO_CHANNEL_SEL) &&
-                    bss->freq != freq)
-                        continue;
-
-                if (!(ifsta->flags & IEEE80211_STA_AUTO_BSSID_SEL) &&
-                    memcmp(bss->bssid, ifsta->bssid, ETH_ALEN))
-                        continue;
-
-                if (!(ifsta->flags & IEEE80211_STA_AUTO_SSID_SEL) &&
-                    !ieee80211_sta_match_ssid(ifsta, bss->ssid, bss->ssid_len))
-                        continue;
-
-                if (!selected || top_rssi < bss->signal) {
-                        selected = bss;
-                        top_rssi = bss->signal;
-                }
+        struct ieee80211_bss *bss;
+        u8 *bssid = ifsta->bssid, *ssid = ifsta->ssid;
+        u8 ssid_len = ifsta->ssid_len;
+        u16 capa_mask = WLAN_CAPABILITY_ESS;
+        u16 capa_val = WLAN_CAPABILITY_ESS;
+        struct ieee80211_channel *chan = local->oper_channel;
+
+        if (ifsta->flags & (IEEE80211_STA_AUTO_SSID_SEL |
+                            IEEE80211_STA_AUTO_BSSID_SEL |
+                            IEEE80211_STA_AUTO_CHANNEL_SEL)) {
+                capa_mask |= WLAN_CAPABILITY_PRIVACY;
+                if (sdata->default_key)
+                        capa_val |= WLAN_CAPABILITY_PRIVACY;
         }
-        if (selected)
-                atomic_inc(&selected->users);
-        spin_unlock_bh(&local->bss_lock);
 
-        if (selected) {
-                ieee80211_set_freq(sdata, selected->freq);
+        if (ifsta->flags & IEEE80211_STA_AUTO_CHANNEL_SEL)
+                chan = NULL;
+
+        if (ifsta->flags & IEEE80211_STA_AUTO_BSSID_SEL)
+                bssid = NULL;
+
+        if (ifsta->flags & IEEE80211_STA_AUTO_SSID_SEL) {
+                ssid = NULL;
+                ssid_len = 0;
+        }
+
+        bss = (void *)cfg80211_get_bss(local->hw.wiphy, chan,
+                                       bssid, ssid, ssid_len,
+                                       capa_mask, capa_val);
+
+        if (bss) {
+                ieee80211_set_freq(sdata, bss->cbss.channel->center_freq);
                 if (!(ifsta->flags & IEEE80211_STA_SSID_SET))
-                        ieee80211_sta_set_ssid(sdata, selected->ssid,
-                                               selected->ssid_len);
-                ieee80211_sta_set_bssid(sdata, selected->bssid);
-                ieee80211_sta_def_wmm_params(sdata, selected->supp_rates_len,
-                                                    selected->supp_rates);
+                        ieee80211_sta_set_ssid(sdata, bss->ssid,
+                                               bss->ssid_len);
+                ieee80211_sta_set_bssid(sdata, bss->cbss.bssid);
+                ieee80211_sta_def_wmm_params(sdata, bss->supp_rates_len,
+                                                    bss->supp_rates);
                 if (sdata->u.sta.mfp == IEEE80211_MFP_REQUIRED)
                         sdata->u.sta.flags |= IEEE80211_STA_MFP_ENABLED;
                 else
@@ -2489,14 +2422,14 @@ static int ieee80211_sta_config_auth(struct ieee80211_sub_if_data *sdata,
                 /* Send out direct probe if no probe resp was received or
                  * the one we have is outdated
                  */
-                if (!selected->last_probe_resp ||
-                    time_after(jiffies, selected->last_probe_resp
+                if (!bss->last_probe_resp ||
+                    time_after(jiffies, bss->last_probe_resp
                                         + IEEE80211_SCAN_RESULT_EXPIRE))
                         ifsta->state = IEEE80211_STA_MLME_DIRECT_PROBE;
                 else
                         ifsta->state = IEEE80211_STA_MLME_AUTHENTICATE;
 
-                ieee80211_rx_bss_put(local, selected);
+                ieee80211_rx_bss_put(local, bss);
                 ieee80211_sta_reset_auth(sdata, ifsta);
                 return 0;
         } else {
diff --git a/net/mac80211/scan.c b/net/mac80211/scan.c
index fc88e2e2f923..f883ab9f1e6e 100644
--- a/net/mac80211/scan.c
+++ b/net/mac80211/scan.c
@@ -12,10 +12,7 @@
  * published by the Free Software Foundation.
  */
 
-/* TODO:
- * figure out how to avoid that the "current BSS" expires
- * use cfg80211's BSS handling
- */
+/* TODO: figure out how to avoid that the "current BSS" expires */
 
 #include <linux/wireless.h>
 #include <linux/if_arp.h>
@@ -30,192 +27,29 @@
 #define IEEE80211_CHANNEL_TIME (HZ / 33)
 #define IEEE80211_PASSIVE_CHANNEL_TIME (HZ / 5)
 
-void ieee80211_rx_bss_list_init(struct ieee80211_local *local)
-{
-        spin_lock_init(&local->bss_lock);
-        INIT_LIST_HEAD(&local->bss_list);
-}
-
-void ieee80211_rx_bss_list_deinit(struct ieee80211_local *local)
-{
-        struct ieee80211_bss *bss, *tmp;
-
-        list_for_each_entry_safe(bss, tmp, &local->bss_list, list)
-                ieee80211_rx_bss_put(local, bss);
-}
-
 struct ieee80211_bss *
 ieee80211_rx_bss_get(struct ieee80211_local *local, u8 *bssid, int freq,
                      u8 *ssid, u8 ssid_len)
 {
-        struct ieee80211_bss *bss;
-
-        spin_lock_bh(&local->bss_lock);
-        bss = local->bss_hash[STA_HASH(bssid)];
-        while (bss) {
-                if (!bss_mesh_cfg(bss) &&
-                    !memcmp(bss->bssid, bssid, ETH_ALEN) &&
-                    bss->freq == freq &&
-                    bss->ssid_len == ssid_len &&
-                    (ssid_len == 0 || !memcmp(bss->ssid, ssid, ssid_len))) {
-                        atomic_inc(&bss->users);
-                        break;
-                }
-                bss = bss->hnext;
-        }
-        spin_unlock_bh(&local->bss_lock);
-        return bss;
-}
-
-/* Caller must hold local->bss_lock */
-static void __ieee80211_rx_bss_hash_add(struct ieee80211_local *local,
-                                        struct ieee80211_bss *bss)
-{
-        u8 hash_idx;
-
-        if (bss_mesh_cfg(bss))
-                hash_idx = mesh_id_hash(bss_mesh_id(bss),
-                                        bss_mesh_id_len(bss));
-        else
-                hash_idx = STA_HASH(bss->bssid);
-
-        bss->hnext = local->bss_hash[hash_idx];
-        local->bss_hash[hash_idx] = bss;
-}
-
-/* Caller must hold local->bss_lock */
-static void __ieee80211_rx_bss_hash_del(struct ieee80211_local *local,
-                                        struct ieee80211_bss *bss)
-{
-        struct ieee80211_bss *b, *prev = NULL;
-        b = local->bss_hash[STA_HASH(bss->bssid)];
-        while (b) {
-                if (b == bss) {
-                        if (!prev)
-                                local->bss_hash[STA_HASH(bss->bssid)] =
-                                        bss->hnext;
-                        else
-                                prev->hnext = bss->hnext;
-                        break;
-                }
-                prev = b;
-                b = b->hnext;
-        }
-}
-
-static struct ieee80211_bss *
-ieee80211_rx_bss_add(struct ieee80211_local *local, u8 *bssid, int freq,
-                     u8 *ssid, u8 ssid_len)
-{
-        struct ieee80211_bss *bss;
-
-        bss = kzalloc(sizeof(*bss), GFP_ATOMIC);
-        if (!bss)
-                return NULL;
-        atomic_set(&bss->users, 2);
-        memcpy(bss->bssid, bssid, ETH_ALEN);
-        bss->freq = freq;
-        if (ssid && ssid_len <= IEEE80211_MAX_SSID_LEN) {
-                memcpy(bss->ssid, ssid, ssid_len);
-                bss->ssid_len = ssid_len;
-        }
-
-        spin_lock_bh(&local->bss_lock);
-        /* TODO: order by RSSI? */
-        list_add_tail(&bss->list, &local->bss_list);
-        __ieee80211_rx_bss_hash_add(local, bss);
-        spin_unlock_bh(&local->bss_lock);
-        return bss;
-}
-
-#ifdef CONFIG_MAC80211_MESH
-static struct ieee80211_bss *
-ieee80211_rx_mesh_bss_get(struct ieee80211_local *local, u8 *mesh_id, int mesh_id_len,
-                          u8 *mesh_cfg, int freq)
-{
-        struct ieee80211_bss *bss;
-
-        spin_lock_bh(&local->bss_lock);
-        bss = local->bss_hash[mesh_id_hash(mesh_id, mesh_id_len)];
-        while (bss) {
-                if (bss_mesh_cfg(bss) &&
-                    !memcmp(bss_mesh_cfg(bss), mesh_cfg, MESH_CFG_CMP_LEN) &&
-                    bss->freq == freq &&
-                    mesh_id_len == bss->mesh_id_len &&
-                    (mesh_id_len == 0 || !memcmp(bss->mesh_id, mesh_id,
-                                                 mesh_id_len))) {
-                        atomic_inc(&bss->users);
-                        break;
-                }
-                bss = bss->hnext;
-        }
-        spin_unlock_bh(&local->bss_lock);
-        return bss;
+        return (void *)cfg80211_get_bss(local->hw.wiphy,
+                                        ieee80211_get_channel(local->hw.wiphy,
+                                                              freq),
+                                        bssid, ssid, ssid_len,
+                                        0, 0);
 }
 
-static struct ieee80211_bss *
-ieee80211_rx_mesh_bss_add(struct ieee80211_local *local, u8 *mesh_id, int mesh_id_len,
-                          u8 *mesh_cfg, int mesh_config_len, int freq)
+static void ieee80211_rx_bss_free(struct cfg80211_bss *cbss)
 {
-        struct ieee80211_bss *bss;
-
-        if (mesh_config_len != IEEE80211_MESH_CONFIG_LEN)
-                return NULL;
-
-        bss = kzalloc(sizeof(*bss), GFP_ATOMIC);
-        if (!bss)
-                return NULL;
-
-        bss->mesh_cfg = kmalloc(MESH_CFG_CMP_LEN, GFP_ATOMIC);
-        if (!bss->mesh_cfg) {
-                kfree(bss);
-                return NULL;
-        }
-
-        if (mesh_id_len && mesh_id_len <= IEEE80211_MAX_MESH_ID_LEN) {
-                bss->mesh_id = kmalloc(mesh_id_len, GFP_ATOMIC);
-                if (!bss->mesh_id) {
-                        kfree(bss->mesh_cfg);
-                        kfree(bss);
-                        return NULL;
-                }
-                memcpy(bss->mesh_id, mesh_id, mesh_id_len);
-        }
-
-        atomic_set(&bss->users, 2);
-        memcpy(bss->mesh_cfg, mesh_cfg, MESH_CFG_CMP_LEN);
-        bss->mesh_id_len = mesh_id_len;
-        bss->freq = freq;
-        spin_lock_bh(&local->bss_lock);
-        /* TODO: order by RSSI? */
-        list_add_tail(&bss->list, &local->bss_list);
-        __ieee80211_rx_bss_hash_add(local, bss);
-        spin_unlock_bh(&local->bss_lock);
-        return bss;
-}
-#endif
+        struct ieee80211_bss *bss = (void *)cbss;
 
-static void ieee80211_rx_bss_free(struct ieee80211_bss *bss)
-{
-        kfree(bss->ies);
         kfree(bss_mesh_id(bss));
         kfree(bss_mesh_cfg(bss));
-        kfree(bss);
 }
 
 void ieee80211_rx_bss_put(struct ieee80211_local *local,
                           struct ieee80211_bss *bss)
 {
-        local_bh_disable();
-        if (!atomic_dec_and_lock(&bss->users, &local->bss_lock)) {
-                local_bh_enable();
-                return;
-        }
-
-        __ieee80211_rx_bss_hash_del(local, bss);
-        list_del(&bss->list);
-        spin_unlock_bh(&local->bss_lock);
-        ieee80211_rx_bss_free(bss);
+        cfg80211_put_bss((struct cfg80211_bss *)bss);
 }
 
 struct ieee80211_bss *
@@ -228,7 +62,7 @@ ieee80211_bss_info_update(struct ieee80211_local *local,
                           bool beacon)
 {
         struct ieee80211_bss *bss;
-        int clen, freq = channel->center_freq;
+        int clen;
         enum cfg80211_signal_type sigtype = CFG80211_SIGNAL_TYPE_NONE;
         s32 signal = 0;
 
@@ -240,39 +74,14 @@ ieee80211_bss_info_update(struct ieee80211_local *local,
                 signal = (rx_status->signal * 100) / local->hw.max_signal;
         }
 
-        cfg80211_put_bss(
-                cfg80211_inform_bss_frame(local->hw.wiphy, channel,
-                                          mgmt, len, signal, sigtype,
-                                          GFP_ATOMIC));
+        bss = (void *)cfg80211_inform_bss_frame(local->hw.wiphy, channel,
+                                                mgmt, len, signal, sigtype,
+                                                GFP_ATOMIC);
 
-#ifdef CONFIG_MAC80211_MESH
-        if (elems->mesh_config)
-                bss = ieee80211_rx_mesh_bss_get(local, elems->mesh_id,
-                                elems->mesh_id_len, elems->mesh_config, freq);
-        else
-#endif
-                bss = ieee80211_rx_bss_get(local, mgmt->bssid, freq,
-                                           elems->ssid, elems->ssid_len);
-        if (!bss) {
-#ifdef CONFIG_MAC80211_MESH
-                if (elems->mesh_config)
-                        bss = ieee80211_rx_mesh_bss_add(local, elems->mesh_id,
-                                elems->mesh_id_len, elems->mesh_config,
-                                elems->mesh_config_len, freq);
-                else
-#endif
-                        bss = ieee80211_rx_bss_add(local, mgmt->bssid, freq,
-                                                  elems->ssid, elems->ssid_len);
-                if (!bss)
-                        return NULL;
-        } else {
-#if 0
-                /* TODO: order by RSSI? */
-                spin_lock_bh(&local->bss_lock);
-                list_move_tail(&bss->list, &local->bss_list);
-                spin_unlock_bh(&local->bss_lock);
-#endif
-        }
+        if (!bss)
+                return NULL;
+
+        bss->cbss.free_priv = ieee80211_rx_bss_free;
 
         /* save the ERP value so that it is available at association time */
         if (elems->erp_info && elems->erp_info_len >= 1) {
@@ -280,9 +89,6 @@ ieee80211_bss_info_update(struct ieee80211_local *local,
                 bss->has_erp_value = 1;
         }
 
-        bss->beacon_int = le16_to_cpu(mgmt->u.beacon.beacon_int);
-        bss->capability = le16_to_cpu(mgmt->u.beacon.capab_info);
-
         if (elems->tim) {
                 struct ieee80211_tim_ie *tim_ie =
                         (struct ieee80211_tim_ie *)elems->tim;
@@ -311,34 +117,11 @@ ieee80211_bss_info_update(struct ieee80211_local *local,
                 bss->supp_rates_len += clen;
         }
 
-        bss->band = rx_status->band;
-
-        bss->timestamp = le64_to_cpu(mgmt->u.beacon.timestamp);
-        bss->last_update = jiffies;
-        bss->signal = rx_status->signal;
-        bss->noise = rx_status->noise;
-        bss->qual = rx_status->qual;
         bss->wmm_used = elems->wmm_param || elems->wmm_info;
 
         if (!beacon)
                 bss->last_probe_resp = jiffies;
 
-        /*
-         * For probe responses, or if we don't have any information yet,
-         * use the IEs from the beacon.
-         */
-        if (!bss->ies || !beacon) {
-                if (bss->ies == NULL || bss->ies_len < elems->total_len) {
-                        kfree(bss->ies);
-                        bss->ies = kmalloc(elems->total_len, GFP_ATOMIC);
-                }
-                if (bss->ies) {
-                        memcpy(bss->ies, elems->ie_start, elems->total_len);
-                        bss->ies_len = elems->total_len;
-                } else
-                        bss->ies_len = 0;
-        }
-
         return bss;
 }
 
@@ -350,7 +133,7 @@ void ieee80211_rx_bss_remove(struct ieee80211_sub_if_data *sdata, u8 *bssid,
 
         bss = ieee80211_rx_bss_get(local, bssid, freq, ssid, ssid_len);
         if (bss) {
-                atomic_dec(&bss->users);
+                cfg80211_unlink_bss(local->hw.wiphy, (void *)bss);
                 ieee80211_rx_bss_put(local, bss);
         }
 }
diff --git a/net/mac80211/spectmgmt.c b/net/mac80211/spectmgmt.c
index 8d4ec2968f8f..47bb2aed2813 100644
--- a/net/mac80211/spectmgmt.c
+++ b/net/mac80211/spectmgmt.c
@@ -102,8 +102,9 @@ void ieee80211_chswitch_work(struct work_struct *work)
                 goto exit;
 
         sdata->local->oper_channel = sdata->local->csa_channel;
+        /* XXX: shouldn't really modify cfg80211-owned data! */
         if (!ieee80211_hw_config(sdata->local, IEEE80211_CONF_CHANGE_CHANNEL))
-                bss->freq = sdata->local->oper_channel->center_freq;
+                bss->cbss.channel = sdata->local->oper_channel;
 
         ieee80211_rx_bss_put(sdata->local, bss);
 exit:
@@ -158,7 +159,9 @@ void ieee80211_process_chanswitch(struct ieee80211_sub_if_data *sdata,
                                                 IEEE80211_QUEUE_STOP_REASON_CSA);
                 ifsta->flags |= IEEE80211_STA_CSA_RECEIVED;
                 mod_timer(&ifsta->chswitch_timer,
-                          jiffies + msecs_to_jiffies(sw_elem->count * bss->beacon_int));
+                          jiffies +
+                          msecs_to_jiffies(sw_elem->count *
+                                           bss->cbss.beacon_interval));
         }
 }